JP4021517B2 - Support shaft structure for vehicle sun visor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a support shaft structure for a vehicle sun visor, and more specifically, in order to stably rotate the sun visor main body around a horizontal shaft portion of a support shaft, The present invention relates to a support shaft structure for a vehicle sun visor in which a support shaft that is pivotably latched on a stationary latch hook is formed.
[0002]
[Prior art]
In this type of vehicle sun visor support shaft structure, as shown in FIGS. 7 and 8, the sun visor body 111 is formed into a hollow shape by blow molding of a thermoplastic synthetic resin or the like, and the support visor shaft is formed on the sun visor body 111. A structure in which the body 113 is integrally formed is known.
As described above, in order to construct the support shaft 130 by assembling the cylindrical shaft body 131 from the outer peripheral side with respect to the support core shaft body 113 of the sun visor body 111 made of a thermoplastic synthetic resin molded body, The body 131 is divided by a pair of half cylinder shafts 131 made of thermoplastic synthetic resin. On the split surfaces of the pair of half cylinder shafts 132, welding concave portions 134 and welding convex portions 135 are alternately formed.
[0003]
In a state where both ends of the support core shaft body 113 are covered with the core shaft cover portion 121 formed of a part of the outer skin 120 that covers the sun visor body 111, a pair of half shafts are supported with respect to the support core shaft body 113. The split cylinder shaft 132 is put on, and the support shaft 130 is configured by joining the welding concave portion 134 and the welding convex portion 135 by ultrasonic welding. And the support shaft 130 is rotatably latched by the latch hook fixed to a vehicle interior ceiling surface.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional support shaft structure of the sun visor for a vehicle, the sun visor body 111 is rotated around the horizontal shaft portion of the support shaft while the support shaft 130 is hooked on the hook. In some cases, the support core shaft 113 of the support shaft 130 and the cylindrical shaft body 131 including the pair of half-split cylindrical shafts 132 may rotate relatively.
Then, due to the relative rotation between the support core shaft body 113 and the cylindrical shaft body 131, abnormal noise is generated between the core shaft covered portion 121 of the outer skin 120 and the cylindrical shaft body 131. Alternatively, there is a case where the core shaft covered part 121 is twisted and damaged.
[0005]
An object of the present invention is, in view of the above-described conventional problems, due to relative rotation between a support core shaft body that constitutes a support shaft of a sun visor body and a cylindrical shaft body that includes a pair of halved cylindrical shafts. It is providing the support shaft structure of the vehicle sun visor which can eliminate the malfunction which becomes.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a support shaft structure for a vehicle sun visor according to the present invention includes a support core shaft body integrally formed at a predetermined position of a sun visor body formed of a molded body of a thermoplastic synthetic resin, and the support thereof. A cylindrical shaft body composed of a pair of half-split cylindrical shafts made of a thermoplastic synthetic resin that is divided in half so as to be assembled from the outer peripheral side of the core shaft body and is bonded by ultrasonic welding and covers the support core shaft body; A support shaft of the vehicle sun visor, wherein a support shaft is configured, and a core shaft covered portion formed of a part of an outer skin covering the sun visor body is inserted between the support core shaft body and the cylindrical shaft body Structure,
A welding concave portion and a welding convex portion are respectively formed on the split surfaces of the pair of half cylinder shafts, and on the inner peripheral wall surface of at least one half cylinder shaft among the pair of half cylinder shafts. The welding projection is formed, and the welding projection is ultrasonically welded to the outer peripheral surface of the support core shaft body, so that the cylindrical shaft body is non-rotatably coupled to the support core shaft body ,
Further, the welding concave portion and the welding convex portion of the pair of half cylinder shafts are ultrasonically welded and coupled, whereby a cylindrical shaft body is formed by the pair of half cylinder shafts, and the support A support shaft is constituted by the core shaft body and the cylindrical shaft body .
[0007]
Therefore, when the sun visor main body is rotated around the horizontal shaft portion of the support shaft with the support shaft hooked to the hook, the cylinder shaft with respect to the support core shaft body of the support shaft The body does not rotate relatively, and the support shaft smoothly rotates in the hook.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
In FIG. 6, the vehicle sun visor 1 is mainly composed of a support shaft 3 and a sun visor body 11.
The support shaft 3 includes a vertical axis portion 4 and a horizontal axis portion 5 and is formed in a substantially L shape. The vertical axis portion 4 is attached to the front corner of the vehicle compartment ceiling surface via the mounting bracket 2. It is done.
The sun visor body 11 is formed into a hollow shape by blow molding of a thermoplastic synthetic resin such as polypropylene, and the outer peripheral surface thereof is covered with an outer skin 20. The sun visor main body 11 is rotatably mounted around the horizontal shaft portion 5 by inserting the horizontal shaft portion 5 of the support shaft 3 in a bearing portion provided at one corner of the sun visor body 11. ing.
[0009]
In order to stably rotate the sun visor main body 11 around the horizontal shaft portion 5 of the support shaft 3, a portion near the free end of the sun visor main body 11 is rotated by a latch hook 6 fixed to the ceiling surface of the passenger compartment. A support shaft 30 is formed which can be latched.
As shown in FIGS. 1 and 2, the support shaft 30 includes a support core shaft body 13 and a cylindrical shaft body 31.
The support core shaft 13 is molded at a predetermined position of the sun visor body 11 at the same time as the sun visor body 11 is molded, and an opening 14 through which the hook 6 can be inserted is formed in the lower part. .
Further, both end portions of the support core shaft body 13 are covered with a core shaft covering portion 21 formed of a part of the outer skin 20.
[0010]
The cylindrical shaft body 31 is divided by a pair of half cylindrical shafts 32 that are formed in a semicylindrical cross section so that they can be assembled from the outer peripheral side of the support core shaft body 13.
The pair of half cylinder shafts 32 are injection-molded from the same material or compatible thermoplastic synthetic resin as the sun visor body 11. On the divided surfaces of the pair of half cylinder shafts 32, welding concave portions 34 and welding convex portions 35 are alternately formed.
A skin insertion portion 33 for covering the core shaft covered portion 21 of the outer skin 20 is formed on the inner peripheral wall surfaces of both ends of the pair of half cylinder shafts 32.
On the inner peripheral wall surface of the pair of half cylinder shafts 32, welding projections 40 are provided so as to be ultrasonically welded to the outer peripheral surface of the support core shaft body 13.
[0011]
That is, in a state in which both ends of the support core shaft body 13 are covered with the core shaft cover portion 21 formed of a part of the outer skin 20 covering the sun visor body 11, the support core shaft body 13 is A pair of halved cylinder shafts 32 is placed.
Thereafter, as shown in FIG. 5B, the welding projections 40 of the pair of half cylinder shafts 32 are ultrasonically welded to the outer peripheral surface of the support core shaft body 13. Subsequently, as shown in FIG. 5C, the welding concave portions 34 and the welding convex portions 35 of the pair of half cylinder shafts 32 are ultrasonically welded and joined together, so that the pair of pairs The half cylinder shaft 32 forms a cylindrical shaft body 31 having a circular cross section, and the support core shaft body 13 and the cylindrical shaft body 31 form a support shaft 130.
And the support shaft 30 is latched and latched by the latching hook 6 fixed to a vehicle interior ceiling surface.
[0012]
This embodiment is configured as described above. Therefore, the sun visor main body 11 is rotated around the horizontal shaft portion 5 of the support shaft 3 under the state where the support shaft 30 is hooked on the hook hook 6, so that the sun visor main body 11 is in the passenger compartment. Are switched between a storage position along the ceiling surface and a light shielding position along the windshield.
When the sun visor main body 11 is rotated, the sun visor main body 11 is stably supported by the supporting force of the hook 6 and the support shaft 30 located at a portion from the free end of the sun visor main body 11 without rattling.
[0013]
A cylindrical shaft body 31 made up of a pair of halved cylindrical shafts 32 is ultrasonically welded to the outer peripheral surface of the support core shaft body 13 of the support shaft 30 and joined integrally. For this reason, when the sun visor body 11 is rotated around the horizontal shaft portion 5 of the support shaft 3 with the support shaft 30 hooked on the hook 6, the support shaft 30 is supported. The cylindrical shaft body 31 does not rotate relative to the core shaft body 13, and the support shaft 30 smoothly rotates in the latching hook 6.
As a result, unlike the conventional case, the relative rotation between the support core shaft 13 and the cylindrical shaft body 31 causes a difference between the core shaft covered portion 21 of the outer skin 20 and the cylindrical shaft body 31. The problem that the sound is generated or the core shaft cover 21 is twisted and damaged is eliminated.
[0014]
【The invention's effect】
As described above, according to the present invention, the support core shaft body that constitutes the support shaft of the sun visor body and the cylindrical shaft body composed of the pair of half-split cylindrical shafts do not relatively rotate. Due to the relative rotation of the support core shaft body and the cylindrical shaft body, abnormal noise is generated between the core shaft covering portion of the outer skin and the cylindrical shaft body, or the outer skin is The problem that the core shaft cover is twisted and broken can be solved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a half cylinder shaft constituting a cylindrical shaft body is separated from a support core shaft body of a sun visor body according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a state in which a half cylindrical shaft constituting the cylindrical shaft body is assembled on the outer periphery of the supporting core shaft body.
3 is a cross-sectional view based on the line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is an explanatory view sequentially showing the steps of constructing a support shaft by ultrasonically welding a pair of halved cylindrical shafts to the outer peripheral surface of the support core shaft body.
FIG. 6 is a front view showing the entire vehicle sun visor.
FIG. 7 is a perspective view showing a state in which a half cylinder shaft constituting a cylinder shaft body is separated from a support core shaft body of a conventional sun visor body.
FIG. 8 is an explanatory view sequentially showing the steps of forming a support shaft by ultrasonically welding a pair of half cylinder shafts to the outer peripheral surface of the support core shaft body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle sun visor 11 Sun visor main body 13 Support core shaft body 20 Outer skin 21 Core shaft covered part 30 Support shaft 31 Cylindrical body body 32 Half split cylinder shaft 34 Welding recessed part 35 Welding convex part 40 Welding protrusion

Claims (1)

A support core shaft body integrally formed at a predetermined position of a sun visor main body made of a thermoplastic synthetic resin molded body, and divided into half parts that can be assembled from the outer peripheral side of the support core shaft body, and joined by ultrasonic welding A support shaft comprising a pair of halved cylindrical shafts made of a thermoplastic synthetic resin covering the support core shaft body, and a part of an outer skin covering the sun visor body A support shaft structure of a vehicle sun visor in which a core shaft covered portion is inserted between the support core shaft body and the cylindrical shaft body,
A welding concave portion and a welding convex portion are respectively formed on the split surfaces of the pair of half cylinder shafts, and on the inner peripheral wall surface of at least one half cylinder shaft among the pair of half cylinder shafts. The welding projection is formed, and the welding projection is ultrasonically welded to the outer peripheral surface of the support core shaft body, so that the cylindrical shaft body is non-rotatably coupled to the support core shaft body ,
Further, the welding concave portion and the welding convex portion of the pair of half cylinder shafts are ultrasonically welded and coupled, whereby a cylindrical shaft body is formed by the pair of half cylinder shafts, and the support A support shaft structure for a vehicle sun visor, characterized in that a support shaft is constituted by the core shaft body and the cylindrical shaft body .

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