JPH0722815U - Support structure of vehicle sun visor - Google Patents

Abstract

(57) [Summary] [Purpose] The vertical axis of the sun visor body is fragile only when an excessive load is applied to the support shaft in the direction perpendicular to the sun visor body at the light blocking position. The durability is improved by giving the required rigidity. [Structure] A vertical axis portion 12 that is attached to a front edge portion of a vehicle interior ceiling surface via an attachment member 3, and a sun visor body 2 that extends substantially horizontally from one end of the vertical axis portion 12 and has a vehicle interior ceiling surface. In the support shaft 11 of the vehicle sun visor 1 provided with a horizontal shaft portion 18 rotatably fitted in a storage position along the windshield surface and a light shielding position along the windshield surface, a plane perpendicular to the sun visor body 2 in the light shielding position. When an excessive load in the direction acts on the support shaft 11, the vertical axis portion 12 easily breaks and has a required rigidity in other directions. ,
A stress concentrating portion 15 having a wall thickness dimension 16 at the front and rear portions smaller than a wall thickness dimension 17 at the left and right portions is provided as a recess.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a support shaft structure for a vehicle sun visor.

[0002]

[Prior art]

 The support shaft of the vehicle sun visor is a vertical axis portion that is attached to the front edge of the cabin ceiling surface via a mounting member, and extends substantially horizontally from one end of the vertical axis portion, and the sun visor body is A structure having a horizontal shaft portion rotatably fitted in a storage position along the ceiling surface and a light-shielding position along the windshield surface is generally used. In such a support shaft, when an excessive load in the direction perpendicular to the sun visor body in the light-shielding position acts on the support shaft, the support shaft is broken at the vertical axis to improve safety. What you have done is known.

Conventionally, for example, a structure disclosed in Japanese Utility Model Publication No. 60-40321 is known as a structure in which a vertical axis portion of a support shaft is bent under a load of a predetermined value or more. That is, in this structure, a notched thin neck portion as a stress concentrating portion is provided as a recess on the outer peripheral surface of the vertical axis portion (base portion) of the support shaft.

[0004]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional type, when a downward load is applied to the support shaft when the sun visor body is rotated, the narrow neck part of the vertical axis part is unexpectedly deformed or broken. There was a problem with durability. In view of the conventional problems described above, an object of the present invention is to provide a structure in which the vertical axis portion of the sun visor main body is easily broken only when an excessive load in the direction perpendicular to the sun visor main body at the light shielding position acts on the spindle. The purpose of the present invention is to provide a support structure for a vehicle sun visor that can improve durability by providing the required rigidity in other directions.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a vertical axis portion that is attached to a front edge portion of a vehicle cabin ceiling surface through a mounting member, and extends substantially horizontally from one end of the vertical axis portion and is a samba. In a spindle of a vehicle sun visor having a horizontal shaft portion rotatably fitted in a retracted position along the vehicle interior ceiling surface and a light shield position along the windshield surface, a sun visor at the light shield position is provided. When an excessive load in the direction perpendicular to the surface of the main body acts on the support shaft, the vertical axis portion is easily broken, and in order to have the required rigidity in other directions, one of the outer peripheral surfaces of the vertical axis portion is broken. The stress concentrating portion is recessed in the portion, the thickness of the front and rear portions of which is smaller than the thickness of the left and right portions.

[0006]

[Action]

 In the vehicle sun visor support shaft structure configured as described above, only when the excessive load in the direction perpendicular to the sun visor body in the light-shielding position acts on the support shaft, It breaks at the stress concentration part and has the required rigidity in other directions, so the vertical axis of the spindle is prevented from being deformed or broken at the stress concentration part when the sun visor body is rotated. It

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, a vehicle sun visor 1 mainly includes a sun visor body 2, a support shaft 11, and a mounting member 3. The mounting member 3 integrally includes a boss portion 4 having a tapered bearing hole for the spindle 11, and a mounting flange 5 extending from the outer peripheral surface of the boss portion 4. Then, the mounting member 3 is fixed to the front edge portion of the ceiling surface of the vehicle compartment with a screw at the mounting flange 5. Further, a plurality of locking claws 6 for retaining and holding 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 contractable by means of split grooves.

The support shaft 11 for supporting the sun visor body 2 at the front edge of the ceiling surface of the vehicle compartment via the mounting member 3 is made of a hard resin such as nylon resin containing glass fiber. The vertical axis portion 12 and the horizontal axis portion 18 extending from one end of the vertical axis portion 12 are integrally provided to form a substantially L shape. The sun visor body 2 is rotatably fitted into the horizontal shaft portion 18 at a storage position along the ceiling surface of the passenger compartment and a light shielding position along the windshield surface. A taper shaft portion 13 is formed on the vertical axis portion 12 of the support shaft 11 so as to be inserted into the mounting member 3 in a tapered shape. The taper shaft portion 13 is formed on the outer peripheral surface of the tip end of the taper shaft portion 13. A locking groove 14 that is engaged with the locking claw 6 and is prevented from being pulled out when the taper hole is fitted and inserted to a predetermined position is annularly recessed.

On the outer peripheral surface of the vertical axis portion 12, a stress concentrating portion 15 is provided in a portion adjacent to the large diameter side of the tapered shaft portion 13. As shown in FIG. 2, the stress concentrating portion 15 is formed such that the front and rear wall thickness dimensions 16 thereof are smaller than the left and right wall thickness dimensions 17 of the stress concentrating portion 15. The structure is easy to break when an excessive load is applied in the direction perpendicular to the surface, and has the required rigidity in other directions, making it difficult to break.

Therefore, when a downward load is applied to the support shaft 11 when the sun visor body 2 is rotated around the horizontal shaft portion 18 of the support shaft 11, the stress concentration portion of the vertical axis part 12 is applied. Since 15 has a required rigidity with respect to the downward load, it is possible to prevent the stress concentration portion 15 from being deformed or broken. Further, when an excessive load acts on the sun visor body 2 arranged at the light shielding position in the direction perpendicular to the surface, the load is concentrated on the stress concentration portion 15 of the vertical axis portion 12 of the support shaft 11 to operate. Since the stress concentrating portion 15 is broken, the sun visor main body 2 falls off, so that the safety is improved.

[0011]

[Effect of device]

 As described above, according to the present invention, only when the excessive load in the direction perpendicular to the surface of the sun visor body in the light-shielding position acts on the support shaft, the vertical axis of the support shaft will concentrate its stress concentration. It is possible to prevent the problem that the vertical axis of the support shaft is deformed or broken at the stress concentrating part when the sun visor body is rotated by making it bend at the part and having the required rigidity in other directions. Therefore, the durability can be improved.

[Brief description of drawings]

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

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

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

[Explanation of symbols]

 1 Vehicle sun visor 2 Sun visor body 3 Mounting member 11 Spindle 12 Vertical axis 15 Stress concentration area 16 Wall thickness of front and rear 17 Wall thickness of left and right 18 Horizontal axis

Claims (1)

[Scope of utility model registration request] 1. A vertical axis portion which is attached to a front edge portion of a vehicle cabin ceiling surface via a mounting member, and a sun visor body which extends substantially horizontally from one end of the vertical axis portion and extends along the vehicle cabin ceiling surface. In a spindle of a vehicle sun visor having a horizontal shaft portion rotatably fitted in a retracted position and a light blocking position along a windshield surface, an excessive load in a direction perpendicular to the sun visor body at the light blocking position. The vertical axis portion is easily broken when acting on the support shaft, and has a required rigidity in other directions, a part of the outer peripheral surface of the vertical axis portion has a front and rear wall thickness. A support structure for a sun visor for a vehicle, characterized in that a stress concentration portion having a dimension smaller than the thickness of the left and right portions is recessed.