JP5909437B2

JP5909437B2 - Sun visor shaft structure

Info

Publication number: JP5909437B2
Application number: JP2012275004A
Authority: JP
Inventors: 岡崎　豊; 豊岡崎; 金敷　昭; 昭金敷
Original assignee: Kasai Kogyo Co Ltd
Current assignee: Kasai Kogyo Co Ltd
Priority date: 2012-12-17
Filing date: 2012-12-17
Publication date: 2016-04-26
Anticipated expiration: 2032-12-17
Also published as: JP2014118057A

Description

本発明は、サンバイザのシャフト構造に関する。 The present invention relates to a shaft structure of a sun visor.

従来のサンバイザのシャフトには、鋼管で形成した筒状芯材の外周を、耐摩耗性を高めた熱可塑性樹脂（以下、被覆樹脂という）で同心円状に被覆したものがある（例えば、特許文献１参照）。この場合、サンバイザ本体は、係止ばねの抵抗力をもってシャフトに回動可能に取付けられている。このとき、シャフト外周の一部には、サンバイザ本体の特定の回動位置で係止ばねの規制力を高めるために被覆樹脂の外側に面取り部が形成され、この面取り部に係止ばねが面接触するようになっている。 Some conventional sun visor shafts are formed by concentrically covering the outer periphery of a cylindrical core member formed of a steel pipe with a thermoplastic resin (hereinafter referred to as a coating resin) with improved wear resistance (for example, Patent Documents). 1). In this case, the sun visor body is rotatably attached to the shaft with the resistance force of the locking spring. At this time, a chamfered portion is formed on the outside of the coating resin on a part of the outer periphery of the shaft in order to increase the regulating force of the locking spring at a specific rotation position of the sun visor body. It comes to contact.

特開２００９−２６９５１４号公報JP 2009-269514 A

しかしながら、特許文献１に記載されたシャフトの筒状芯材は、面取り部の内部に対応した箇所が断面円形状となっているため、面取り部の形成部分で被覆樹脂が薄肉化してしまう。このため、係止ばねが面取り部に面接触した状態でサンバイザ本体を急激に回動した場合等にあっては、被覆樹脂に過大なトルクが作用するため、被覆樹脂がねじれて筒状芯材から剥がれ易くなってしまう。 However, since the cylindrical core material of the shaft described in Patent Document 1 has a circular cross-section at a portion corresponding to the inside of the chamfered portion, the coating resin is thinned at the portion where the chamfered portion is formed. For this reason, when the sun visor main body is suddenly rotated with the locking spring in surface contact with the chamfered portion, an excessive torque acts on the coating resin, so that the coating resin is twisted and the cylindrical core material It will be easy to peel off.

また、特許文献１には、筒状芯材の外周面の一部に突起が形成されているが、この突起は面取り部から外れた隣接部位に位置しているため、面取り部において被覆樹脂のねじれを積極的に阻止する機能は低下し、依然として被覆樹脂が剥がれ易いという虞がある。 Further, in Patent Document 1, a protrusion is formed on a part of the outer peripheral surface of the cylindrical core member. However, since this protrusion is located at an adjacent portion that is removed from the chamfered portion, the coating resin is not formed in the chamfered portion. There is a possibility that the function of positively preventing twisting is lowered and the coating resin is still easily peeled off.

本発明は、かかる点に鑑みてなされたものであり、過大なトルクが作用した場合にも被覆樹脂の剥がれを抑制できるサンバイザのシャフト構造を提供することを目的とする。 This invention is made | formed in view of this point, and it aims at providing the shaft structure of the sun visor which can suppress peeling of coating resin, even when an excessive torque acts.

請求項１に記載の発明の前段は、
筒状芯材の外周に被覆樹脂が設けられたシャフトと、前記シャフトに回動可能に取り付けられるサンバイザ本体と、前記シャフトと前記サンバイザ本体との間に介在され、前記シャフトの外周に弾接して前記サンバイザ本体に回動抵抗力を付与するばね部材と、前記被覆樹脂の外周の一部に形成され前記ばね部材が面接触する面取り部と、を備え、
前記筒状芯材が前記面取り部に対応する部位に、前記面取り部の形成側を筒状芯材の中心側に設定して、該面取り部と略平行でかつ該面取り部と略相似形の、凹陥部が凹設され、前記凹陥部が前記面取り部と略平行な状態では、前記面取り部が凹設されるため、該凹陥部が前記面取り部に対し、概ね平行といえる程度の傾きを示す、サンバイザのシャフト構造である。 The first stage of the invention according to claim 1 is:
A shaft provided with a coating resin on the outer periphery of the cylindrical core material, a sun visor main body rotatably attached to the shaft, and interposed between the shaft and the sun visor main body, elastically contacting the outer periphery of the shaft A spring member that imparts rotational resistance to the sun visor body, and a chamfered portion that is formed on a part of the outer periphery of the coating resin and is in surface contact with the spring member,
At a site the cylindrical core material corresponding to the chamfered portion, the formation side of the chamfered portion is set to the center side of the cylindrical core member, substantially parallel and chamfer the shape similar with the chamfer , recess is recessed in the substantially parallel with said recessed portion is the chamfer, since the chamfer is recessed with respect to the recessed portion is the chamfered portion, the inclination of the extent to which it can be said generally parallel It is the shaft structure of a sun visor shown .

請求項１に記載の発明の後段は、
前記凹陥部は、前記被覆樹脂が陥入する窪みを有し、該陥入した被覆樹脂は、該被覆樹脂が前記筒状芯材に対し回動してねじれ変形する、のを抑制する、サンバイザのシャフト構造である。 The subsequent stage of the invention according to claim 1 is:
The recessed portion has a recess into which the coating resin is recessed, and the recessed coating resin suppresses the coating resin from rotating and twisting with respect to the cylindrical core material. The shaft structure.

請求項２に記載の発明は、
筒状芯材の外周に被覆樹脂が設けられたシャフトと、前記シャフトに回動可能に取り付けられるサンバイザ本体と、前記シャフトと前記サンバイザ本体との間に介在され、前記シャフトの外周に弾接して前記サンバイザ本体に回動抵抗力を付与するばね部材と、前記被覆樹脂の外周の一部に形成され前記ばね部材が面接触する面取り部と、を備え、前記筒状芯材が前記面取り部に対応する部位に、前記面取り部の形成側を筒状芯材の中心側に設定して、該面取り部と略平行でかつ該面取り部と略相似形の、凹陥部が凹設され、前記凹陥部が前記面取り部と略平行な状態では、前記面取り部が凹設されるため、該凹陥部が前記面取り部に対し、概ね平行といえる程度の傾きを示し、
前記凹陥部は、前記面取り部と略平行な方向に凹設され、さらに、前記凹陥部は、前記被覆樹脂が陥入する窪みを有し、該陥入した被覆樹脂は、該被覆樹脂が前記筒状芯材に対し回動してねじれ変形する、のを抑制する、サンバイザのシャフト構造である。 The invention described in claim 2
A shaft provided with a coating resin on the outer periphery of the cylindrical core material, a sun visor main body rotatably attached to the shaft, and interposed between the shaft and the sun visor main body, elastically contacting the outer periphery of the shaft A spring member that imparts rotational resistance to the sun visor body; and a chamfered portion that is formed on a part of the outer periphery of the coating resin and that is in surface contact with the spring member, and the cylindrical core member is provided on the chamfered portion. In the corresponding part, the chamfered portion is formed on the center side of the cylindrical core member, and a concave portion that is substantially parallel to the chamfered portion and substantially similar to the chamfered portion is provided in the concave portion. In a state where the portion is substantially parallel to the chamfered portion, the chamfered portion is recessed, so that the recessed portion shows an inclination that can be said to be substantially parallel to the chamfered portion,
The recessed portion is recessed in a direction substantially parallel to the beveled portion, further, the recessed portion has a recess wherein the coating resin is invaginated, the invaginated coating resin, the coating resin is the This is a shaft structure of a sun visor that suppresses torsional deformation by rotating with respect to the cylindrical core material .

請求項１に記載の発明の前段によれば、凹陥部により面取り部の形成部分で被覆樹脂を厚く確保して被覆樹脂の剥がれを抑制できる。 According to the first stage of the invention described in claim 1, it is possible to prevent the coating resin from peeling off by securing a thick coating resin at the chamfered portion formed by the recessed portion.

請求項１に記載の発明の後段によれば、凹陥部の窪みに被覆樹脂が陥入することにより、被覆樹脂がねじれるのを阻止する効果を高めることができる。 According to the latter stage of the invention described in claim 1 , the effect of preventing the coating resin from being twisted can be enhanced by the coating resin intruding into the depression of the recessed portion .

請求項２に記載の発明によれば、凹陥部は面取り部と略平行な方向に凹設されているので、面取り部での被覆樹脂をより厚く確保できる。 According to the second aspect of the present invention, since the recessed portion is recessed in a direction substantially parallel to the chamfered portion, the coating resin at the chamfered portion can be secured thicker .

実施形態のシャフト構造を適用したサンバイザの取付状態を示し斜視図である。It is a perspective view which shows the attachment state of the sun visor which applied the shaft structure of embodiment. 本実施形態のサンバイザのシャフト構造を示す分解斜視図である。It is a disassembled perspective view which shows the shaft structure of the sun visor of this embodiment. 図１中I−I線に沿った拡大断面図である。It is an expanded sectional view along the II line in FIG. ばね部材がシャフトの面取り部に面接触した状態を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the state which the spring member surface-contacted with the chamfered part of the shaft. 図２中II−II線に沿った拡大断面図である。It is an expanded sectional view along the II-II line in FIG. 図５中III−III線に沿った断面図である。It is sectional drawing along the III-III line in FIG. （ａ）〜（ｃ）は、本実施形態の変形例をそれぞれ示す図６に対応した断面図である。(A)-(c) is sectional drawing corresponding to FIG. 6 which shows the modification of this embodiment, respectively.

以下、本発明の一実施形態について図面を参照して説明する。図１は、本実施形態のサンバイザ１の取付状態を示し、このサンバイザ１は、サンバイザ本体２とこのサンバイザ本体２を回動可能に取り付けるシャフト３とを備えて、運転席側と助手席側に設けられる。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a mounting state of a sun visor 1 according to the present embodiment. The sun visor 1 includes a sun visor main body 2 and a shaft 3 on which the sun visor main body 2 is rotatably mounted. Provided.

シャフト３は、図２示すように、取付け側となる基端部に略直角に折曲した取付け部３１が設けられて、全体として略Ｌ字状に形成される。取付け部３１には、図１に示すようにブラケット３２が回転可能に取り付けられ、このブラケット３２が、フロントウインドウＦＷの上側部内方に配設された図外のルーフ骨格部材の車幅方向端部に固定される。 As shown in FIG. 2, the shaft 3 is provided with an attachment portion 31 that is bent at a substantially right angle at a base end portion on the attachment side, and is formed in a substantially L shape as a whole. As shown in FIG. 1, a bracket 32 is rotatably attached to the attachment portion 31, and this bracket 32 is arranged at the end in the vehicle width direction of a roof skeleton member (not shown) disposed inside the upper portion of the front window FW. Fixed to.

ブラケット３２が固定された状態では、シャフト３はフロントウインドウＦＷの上縁に沿って略水平方向に配置されるとともに、取付け部３１は略上下方向に配置される。そして、シャフト３は、サンバイザ本体２が取り付いた状態で、ブラケット３２をピボットとしてフロントウインドウＦＷ側とサイドウインドウＳＷ側との間で旋回可能となっている。図１中、ＦＰはフロントピラー、ＲＣは室内天井である。 In a state where the bracket 32 is fixed, the shaft 3 is disposed in a substantially horizontal direction along the upper edge of the front window FW, and the attachment portion 31 is disposed in a substantially vertical direction. The shaft 3 is pivotable between the front window FW side and the side window SW side with the bracket 32 as a pivot, with the sun visor body 2 attached. In FIG. 1, FP is a front pillar and RC is an indoor ceiling.

サンバイザ本体２は、図２に示すシャフト保持部材４によってシャフト３に取り付けられる。シャフト保持部材４は、サンバイザ本体２のシャフト３が挿通される上縁内部に固定されている。シャフト保持部材４は、シャフト３の長さ方向に配置されるベース部４１の両端部に、一対の円筒状の軸受部４２が所定間隔をもって立設されることにより、全体的に略コ字状に形成される。そして、サンバイザ本体２の上側縁部に差し込んだシャフト３の先端部を、シャフト保持部材４の一対の軸受部４２に挿入し、軸受部４２から突出したシャフト３先端のキー３３によって抜止めされる。この状態で、サンバイザ本体２は、図３に示すように、シャフト３を中心として上下回動が可能となっている。 The sun visor body 2 is attached to the shaft 3 by a shaft holding member 4 shown in FIG. The shaft holding member 4 is fixed inside the upper edge through which the shaft 3 of the sun visor body 2 is inserted. The shaft holding member 4 has a generally U-shape as a whole when a pair of cylindrical bearing portions 42 are erected at predetermined intervals on both ends of a base portion 41 arranged in the length direction of the shaft 3. Formed. And the front-end | tip part of the shaft 3 inserted in the upper edge part of the sun visor main body 2 is inserted in a pair of bearing part 42 of the shaft holding member 4, and it is prevented by the key 33 at the front-end | tip of the shaft 3 which protruded from the bearing part 42. . In this state, the sun visor body 2 can be rotated up and down around the shaft 3 as shown in FIG.

このとき、シャフト３とサンバイザ本体２との間には、シャフト３の外周に弾接してサンバイザ本体２に回動抵抗力を付与する金属製のばね部材５が介在されている。ばね部材５は、図２に示すようにシャフト３の外周を包み込み、その周方向一部が分離される断面円弧状に形成されたシャフト挟持部５１と、このシャフト挟持部５１の分離部両側から互いに平行に延設される一対の固定脚壁５２とを有している。一対の固定脚壁５２の先端部は、互いの対向方向に断面Ｌ字状に折曲され、それぞれの折曲面５２ａは相互に重ね合わされている。このとき、シャフト挟持部５１は、シャフト３の外周に弾接する部分となる。 At this time, a metal spring member 5 is provided between the shaft 3 and the sun visor body 2 so as to elastically contact the outer periphery of the shaft 3 and to impart a rotational resistance force to the sun visor body 2. As shown in FIG. 2, the spring member 5 wraps around the outer periphery of the shaft 3, and a shaft holding portion 51 formed in a circular arc shape in which a part in the circumferential direction is separated from both sides of the separating portion of the shaft holding portion 51. It has a pair of fixed leg wall 52 extended in parallel mutually. The distal ends of the pair of fixed leg walls 52 are bent in an L-shaped cross section in opposite directions, and the respective bent curved surfaces 52a are overlapped with each other. At this time, the shaft clamping portion 51 is a portion that elastically contacts the outer periphery of the shaft 3.

ばね部材５は、シャフト保持部材４の一対の軸受部４２間に形成される凹部４３に、シャフト挟持部５１と一対の軸受部４２とが略同軸となるように配置される。一方、シャフト保持部材４には、一対の軸受部４２間に跨がってベース部４１と平行に桟部４４が一体に設けられており、ばね部材５の一対の固定脚壁５２は、自己の弾発力により桟部４４に弾性挟持されることにより、ばね部材５はシャフト保持部材４に保持される。また、シャフト挟持部５１の周方向一部には平坦部５３が形成されており、この平坦部５３は、シャフト挟持部５１の長手方向両端部に所定間隔を設けて一対設けられている。 The spring member 5 is disposed in a recess 43 formed between the pair of bearing portions 42 of the shaft holding member 4 so that the shaft clamping portion 51 and the pair of bearing portions 42 are substantially coaxial. On the other hand, the shaft holding member 4 is integrally provided with a crosspiece 44 that extends between the pair of bearing portions 42 and parallel to the base portion 41, and the pair of fixed leg walls 52 of the spring member 5 are self-supporting. The spring member 5 is held by the shaft holding member 4 by being elastically held by the crosspiece 44 by the elastic force of the shaft. Further, a flat portion 53 is formed in a part of the circumferential direction of the shaft clamping portion 51, and a pair of the flat portions 53 is provided at both ends in the longitudinal direction of the shaft clamping portion 51 with a predetermined interval.

シャフト３は、図４〜図６に示すように、鋼管等の金属管で形成される筒状芯材３Ａと、この筒状芯材３Ａの外周に、合成樹脂を射出成形等により密着して被覆した被覆樹脂３Ｂとを備えている。被覆樹脂３Ｂは、キー３３が取り付けられる先端部３ａおよびブラケット３２が取り付けられる基端部３ｂを除いたシャフト３の全体に設けられる。 As shown in FIGS. 4 to 6, the shaft 3 has a cylindrical core 3 A formed of a metal pipe such as a steel pipe, and a synthetic resin adhered to the outer periphery of the cylindrical core 3 A by injection molding or the like. And a coated resin 3B. The coating resin 3B is provided on the entire shaft 3 except for the distal end portion 3a to which the key 33 is attached and the proximal end portion 3b to which the bracket 32 is attached.

ところで、ばね部材５は、シャフト挟持部５１がシャフト３の外周に弾接して、サンバイザ本体２を任意の回動位置で静止できるように回動抵抗が付与される。しかし、本実施形態では、サンバイザ本体２の特定位置でより確実に静止できるように、図４に示すように、被覆樹脂３Ｂの外周の一部にシャフト挟持部５１が面接触する面取り部３４が形成されている。面取り部３４は、図５に示すように、シャフト挟持部５１の長手方向両端部に形成した一対の平坦部５３に対応した位置に一対設けられる。 By the way, the spring member 5 is provided with a rotation resistance so that the shaft clamping portion 51 is in elastic contact with the outer periphery of the shaft 3 so that the sun visor body 2 can be stopped at an arbitrary rotation position. However, in the present embodiment, as shown in FIG. 4, the chamfered portion 34 in which the shaft clamping portion 51 is in surface contact with a part of the outer periphery of the coating resin 3 B is provided so that the sun visor body 2 can be more securely stopped at a specific position. Is formed. As shown in FIG. 5, a pair of chamfered portions 34 are provided at positions corresponding to a pair of flat portions 53 formed at both ends in the longitudinal direction of the shaft clamping portion 51.

ここで、本実施形態では、図６に示すように、筒状芯材３Ａが面取り部３４に対応する部位に、面取り部３４の形成側を筒状芯材３Ａの中心側に凹設した凹陥部３５を設けてある。凹陥部３５は、面取り部３４と略平行な方向に凹設され、同図に示すように、筒状芯材３Ａの凹陥部３５の形成部分での断面形状は、被覆樹脂３Ｂの面取り部３４の形成部分での断面形状と略相似形となっている。このように凹陥部３５が設けられることにより、筒状芯材３Ａは面取り部３４の形成部分で非円形断面となる。 Here, in this embodiment, as shown in FIG. 6, the concave portion in which the cylindrical core material 3 A is provided at the portion corresponding to the chamfered portion 34 and the formation side of the chamfered portion 34 is recessed in the center side of the cylindrical core material 3 A. A portion 35 is provided. The recessed portion 35 is recessed in a direction substantially parallel to the chamfered portion 34. As shown in the figure, the cross-sectional shape of the cylindrical core 3A where the recessed portion 35 is formed has a chamfered portion 34 of the coating resin 3B. The cross-sectional shape at the forming portion is substantially similar. By providing the recessed portion 35 in this way, the cylindrical core material 3 A has a non-circular cross section at the portion where the chamfered portion 34 is formed.

また、凹陥部３５は、面取り部３４に対応して一対設けられたことにより、それら凹陥部３５は、図５に示すようにシャフト３の軸方向に分離して設けられている。尚、本実施形態では、凹陥部３５を一対の面取り部３４に対応させたので、凹陥部３５は軸方向に一対設けられるが、面取り部３４が３箇所以上設けられる場合は、それぞれの面取り部３４に対応させて凹陥部３５を３箇所以上設けることができる。 Further, since a pair of recessed portions 35 are provided corresponding to the chamfered portions 34, the recessed portions 35 are provided separately in the axial direction of the shaft 3 as shown in FIG. In this embodiment, since the recessed portions 35 correspond to the pair of chamfered portions 34, a pair of recessed portions 35 are provided in the axial direction. However, when three or more chamfered portions 34 are provided, each chamfered portion 35 is provided. 3 or more can be provided in correspondence with 34.

このように構成された本実施形態のサンバイザ１では、サンバイザ本体２を上下回動する際に、このサンバイザ本体２と一体となってばね部材５が回動し、このばね部材５は、シャフト３に対してシャフト挟持部５１の回動抵抗をもって相対回転することになる。このとき、サンバイザ本体２の特定の回動位置で、図４に示すように、シャフト挟持部５１の平坦部５３が被覆樹脂３Ｂの面取り部３４に位置して、それら面取り部３４と平坦部５３が面接触することになる。このように、面取り部３４と平坦部５３が面接触することにより、サンバイザ本体２の静止力を増大することができる。 In the sun visor 1 of the present embodiment configured as described above, when the sun visor body 2 is rotated up and down, the spring member 5 is rotated integrally with the sun visor body 2, and the spring member 5 is connected to the shaft 3. On the other hand, it rotates relative to the shaft clamping portion 51 with the rotational resistance. At this time, as shown in FIG. 4, the flat portion 53 of the shaft clamping portion 51 is positioned at the chamfered portion 34 of the coating resin 3 B at a specific rotation position of the sun visor body 2. Will come into surface contact. Thus, the resting force of the sun visor body 2 can be increased by the surface contact between the chamfered portion 34 and the flat portion 53.

従って、面取り部３４と平坦部５３の形成位置を、サンバイザ本体２が図３中実線位置に示す格納位置に対応するように予め設定しておくことにより、自動車の走行時の振動やラフロードでの衝撃が入力された場合にも、サンバイザ本体２が走行振動などにより格納位置から勝手に下がってしまうのを抑えることができる。尚、サンバイザ本体２の格納位置とは、サンバイザ本体２を上方に回動して室内天井ＲＣに沿うように回動した位置である。勿論、面取り部３４と平坦部５３の形成位置は、サンバイザ本体２の格納位置に限ることなく所望の回動位置に対応させて設定させておくこともできる。 Therefore, by setting the formation position of the chamfered portion 34 and the flat portion 53 in advance so that the sun visor main body 2 corresponds to the storage position indicated by the solid line position in FIG. Even when an impact is input, it is possible to prevent the sun visor body 2 from being arbitrarily lowered from the storage position due to traveling vibration or the like. The storage position of the sun visor main body 2 is a position where the sun visor main body 2 is rotated upward and rotated along the indoor ceiling RC. Of course, the formation position of the chamfered portion 34 and the flat portion 53 is not limited to the storage position of the sun visor body 2 and can be set in correspondence with a desired rotation position.

以上が実施形態のサンバイザ１のシャフト３構造である。このような実施形態によれば、筒状芯材３Ａが被覆樹脂３Ｂの面取り部３４に対応する部位に凹陥部３５が設けられている。凹陥部３５は、面取り部３４の形成側を筒状芯材３Ａの中心側に凹設して形成してあるので、筒状芯材３Ａの外周に被覆樹脂３Ｂを射出成形した際に、面取り部３４の形成部分で被覆樹脂３Ｂを厚肉に形成することができる。 The above is the structure of the shaft 3 of the sun visor 1 of the embodiment. According to such embodiment, the recessed part 35 is provided in the site | part in which the cylindrical core material 3A respond | corresponds to the chamfer 34 of the coating resin 3B. The recessed portion 35 is formed by recessing the forming side of the chamfered portion 34 to the center side of the cylindrical core material 3A. Therefore, when the coating resin 3B is injection-molded on the outer periphery of the cylindrical core material 3A, the chamfered portion 35 is chamfered. The coating resin 3B can be formed thick at the portion where the portion 34 is formed.

従って、ばね部材５（シャフト挟持部５１の平坦部５３）が面取り部３４に面接触した状態で、乗員がサンバイザ本体２を急激に回動するなどして、ばね部材５とシャフト３との間に過大な相対回動力が作用した場合に、被覆樹脂３Ｂが大きくねじれ変形しようとする。このとき、本実施形態では、面取り部３４の形成部分で被覆樹脂３Ｂが厚肉に形成されているので、厚肉となった被覆樹脂３Ｂの肉厚部分でねじれ変形力を分散できるため、被覆樹脂３Ｂの剥がれを抑制できる。 Accordingly, the occupant suddenly rotates the sun visor body 2 while the spring member 5 (the flat portion 53 of the shaft clamping portion 51) is in surface contact with the chamfered portion 34. When excessive relative rotational force is applied to the coating resin 3B, the coating resin 3B tends to be largely twisted and deformed. At this time, in the present embodiment, since the coating resin 3B is formed thick at the portion where the chamfered portion 34 is formed, the torsional deformation force can be dispersed at the thick portion of the coating resin 3B that has become thick. Peeling of the resin 3B can be suppressed.

また、本実施形態によれば、図６に示すように、凹陥部３５は面取り部３４と略平行な方向に凹設されているので、面取り部３４における被覆樹脂３Ｂをより厚く確保でき、ひいては、被覆樹脂３Ｂの剥がれを抑制する効果を更に高めることができる。 Further, according to the present embodiment, as shown in FIG. 6, since the recessed portion 35 is recessed in a direction substantially parallel to the chamfered portion 34, the coating resin 3 B in the chamfered portion 34 can be secured thicker, and thus Moreover, the effect which suppresses peeling of coating resin 3B can further be heightened.

更に、本実施形態では、図５に示すように、一対の凹陥部３５がシャフト３の軸方向に分離して設けられたことにより、被覆樹脂３Ｂが軸方向にズレるのを抑制できる。 Further, in the present embodiment, as shown in FIG. 5, the pair of recessed portions 35 are provided separately in the axial direction of the shaft 3, thereby preventing the coating resin 3 B from shifting in the axial direction.

図７（ａ）〜（ｃ）は、凹陥部３５の他の実施形態をそれぞれ示し、上記実施形態と同一構成部分に同一符号を付して重複する説明を省略して述べるものとする。即ち、それぞれの凹陥部３５に、被覆樹脂３Ｂが陥入する窪み３６ａ〜３６ｃを設けるようになっている。 7 (a) to 7 (c) show other embodiments of the recessed portion 35, respectively, and the same components as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. That is, the recesses 35a to 36c into which the coating resin 3B is inserted are provided in the respective recessed portions 35.

即ち、図７（ａ）に示す窪み３６ａは、凹陥部３５の両側部の断面形状を円弧状にして、それら円弧部分３５ａ、３５ｂが交わる部分Ｃで形成されるようになっており、このときの筒状芯材３Ａの断面形状は略ハートマーク状となっている。図７（ｂ）に示す窪み３６ｂは、凹陥部３５全体を断面Ｖ字状に凹設させ、そのＶ字状の凹設部分で形成されている。図７（ｃ）に示す窪み３６ｃは、凹陥部３５を図６と同様に平坦に形成し、その平坦な凹陥部３５の中央部を断面コ字状に凹設させた部分で形成されている。 That is, the recess 36a shown in FIG. 7 (a) is formed at a portion C where the arc portions 35a and 35b intersect, with the cross-sectional shape of both sides of the recessed portion 35 being an arc shape. The cross-sectional shape of the cylindrical core material 3A is substantially a heart mark shape. The recess 36b shown in FIG. 7 (b) is formed of a V-shaped recessed portion, with the entire recessed portion 35 being recessed in a V-shaped cross section. The recess 36c shown in FIG. 7C is formed by a portion in which the recessed portion 35 is formed flat similarly to FIG. 6, and the central portion of the flat recessed portion 35 is recessed in a U-shaped cross section. .

このように、それぞれの凹陥部３５に窪み３６ａ〜３６ｃを形成したことにより、筒状芯材３Ａの外周に被覆樹脂３Ｂを射出成形した際に、被覆樹脂３Ｂが窪み３６ａ〜３６ｃに陥入する。すると、それぞれの窪み３６ａ〜３６ｃに陥入した被覆樹脂３Ｂが、面取り部３４の被覆樹脂３Ｂを筒状芯材２３Ａに対して回転方向に係止する機能を果たすことができる。これにより、面取り部３４における被覆樹脂３Ｂのねじれをより効果的に抑制でき、ひいては、被覆樹脂３Ｂの剥がれの阻止効果をより高めることができる。
尚、図７（ａ）〜（ｃ）に示す窪み３６ａ〜３６ｃは一例であり、これら以外にも窪みの形状は各種設定できる。 Thus, by forming the depressions 36a to 36c in the respective recessed portions 35, when the coating resin 3B is injection-molded on the outer periphery of the cylindrical core member 3A, the coating resin 3B is recessed into the depressions 36a to 36c. . Then, the coating resin 3B invaded in each of the recesses 36a to 36c can perform a function of locking the coating resin 3B of the chamfered portion 34 with respect to the cylindrical core member 23A in the rotation direction. Thereby, the twist of coating resin 3B in chamfer 34 can be suppressed more effectively, and the prevention effect of peeling of coating resin 3B can be further enhanced.
The depressions 36a to 36c shown in FIGS. 7A to 7C are examples, and various shapes of depressions can be set in addition to these.

ところで、上述した各実施形態では、シャフト３外周の面取り部３４およびばね部材５の平坦部５３は、周方向の１箇所で互いに面接触させるようにしたが、これに限ることなく面取り部３４および平坦部５３の少なくとも一方を周方向に複数箇所設けることができる。これにより、サンバイザ本体２は上下方向の回動範囲中でより確実に静止できる位置を複数設定することができる。 Incidentally, in each of the above-described embodiments, the chamfered portion 34 on the outer periphery of the shaft 3 and the flat portion 53 of the spring member 5 are brought into surface contact with each other at one place in the circumferential direction. At least one of the flat portions 53 can be provided at a plurality of locations in the circumferential direction. As a result, the sun visor body 2 can set a plurality of positions where the sun visor body 2 can be more surely stopped within the vertical rotation range.

１サンバイザ
２サンバイザ本体
３シャフト
３Ａ筒状芯材
３Ｂ被覆樹脂
３４面取り部
３５凹陥部
３６ａ〜３６ｃ窪み
５ばね部材 DESCRIPTION OF SYMBOLS 1 Sun visor 2 Sun visor main body 3 Shaft 3A Cylindrical core material 3B Coating resin 34 Chamfering part 35 Recessed part 36a-36c Depression 5 Spring member

Claims

A shaft provided with a coating resin on the outer periphery of the cylindrical core;
A sun visor body rotatably attached to the shaft;
A spring member interposed between the shaft and the sun visor body, elastically contacting the outer periphery of the shaft and applying a rotational resistance force to the sun visor body;
A chamfered portion formed on a part of the outer periphery of the coating resin and in contact with the spring member,
At a site the cylindrical core material corresponding to the chamfered portion, the formation side of the chamfered portion is set to the center side of the cylindrical core member, substantially parallel and chamfer the shape similar with the chamfer , The recess is recessed ,
In the state in which the recessed portion is substantially parallel to the chamfered portion, the chamfered portion is recessed, so that the recessed portion has an inclination that can be said to be substantially parallel to the chamfered portion,
The recessed portion has a recess into which the coating resin is recessed, and the recessed coating resin prevents the coating resin from rotating and twisting with respect to the cylindrical core material. Sun visor shaft structure characterized by

A shaft provided with a coating resin on the outer periphery of the cylindrical core;
A sun visor body rotatably attached to the shaft;
A spring member interposed between the shaft and the sun visor body, elastically contacting the outer periphery of the shaft and applying a rotational resistance force to the sun visor body;
A chamfered portion formed on a part of the outer periphery of the coating resin and in contact with the spring member,
The cylindrical core material corresponds to the chamfered portion, the chamfered portion is formed on the center side of the cylindrical core material, and is substantially parallel to the chamfered portion and substantially similar to the chamfered portion. , The recess is recessed,
In the state in which the recessed portion is substantially parallel to the chamfered portion, the chamfered portion is recessed, so that the recessed portion has an inclination that can be said to be substantially parallel to the chamfered portion,
The recessed portion is recessed in a direction substantially parallel to the chamfered portion,
Further, the recessed portion has a recess into which the coating resin is inserted, and the indented coating resin suppresses the coating resin from rotating and twisting with respect to the cylindrical core member. ,
A shaft structure of a sun visor characterized by that.