JP4091731B2

JP4091731B2 - Hinge mechanism

Info

Publication number: JP4091731B2
Application number: JP2000195707A
Authority: JP
Inventors: 悟志山田; 智子渡部
Original assignee: Piolax Inc
Current assignee: Piolax Inc
Priority date: 2000-06-29
Filing date: 2000-06-29
Publication date: 2008-05-28
Anticipated expiration: 2020-06-29
Also published as: JP2002013524A

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば、自動車のカップホルダーなどに応用できるヒンジ機構の改良に関するものである。
【０００２】
【従来の技術】
従来のヒンジ機構を備えるカップホルダーとして、特開２０００−１６１３８号公報に示すものが存する。
該従来のカップホルダーは、具体的には図示しないが、自動車のドアトリム側に固定されるベース部材と、該ベース部材の一端部側に回転可能に軸支されるアーム部材とから成り、前者のベース部材は、その一端部上下方向に２個の凹部を形成して、該各凹部を画成する上下壁に軸受孔部を穿設し、後者のアーム部材は、その一端部上下方向に上記各凹部に嵌め込まれる２個の凸部を形成して、該各凸部の上下面に上記軸受孔部に係入する軸部を突設する構成となっている。
【０００３】
この為、実際の使用に際しては、アーム部材側の凸部をベース部材側の凹部内に嵌め込みながら、各凸部の上下面に突設された軸部を凹部の上下壁に穿設された軸受孔部内に係入すると、アーム部材がベース部材に回動可能に軸支されるので、斯かる状態を得た後は、ベース部材をドアトリム側に固定して、アーム部材を開放方向に回転させると、カップはベース部材の底壁に載置された状態をもってベース部材とアーム部材間に保持されることとなる。従って、従来のカップホルダーにあっては、ベース部材に軸支されたアーム部材を開放方向と閉塞方向に回転させれば、その使用状態と不使用状態が簡単に得られることとなる。
【０００４】
【発明が解決しようとする課題】
しかし、従来のヒンジ機構にあっては、アーム部材をベース部材に回転可能に軸支するためには、アーム部材側の凸部をベース部材側の凹部内に嵌め込みながら、各凸部の上下面に突設された軸部を凹部の上下壁に穿設された軸受孔部に無理矢理に係入しなければならないので、組付作業性に劣る嫌いがあった。
【０００５】
【課題を解決するための手段】
本発明は、斯かる従来のヒンジ機構の課題を有効に解決するために開発されたもので、請求項１記載の発明は、固定部材に可動部材を回転可能に軸支するヒンジ機構において、固定部材は、その一端部側に上下方向に連続する凹部を設け、該凹部を画成する上壁に軸受孔部を穿設すると共に、同下壁に第一軸部を突設し、可動部材は、その一端部側に上記固定部材の凹部に嵌め込まれる凸部を上下方向に連続して設け、該凸部を画成する上壁に上記固定部材の軸受孔部に係入する第二軸部を突設すると共に、同下壁に上記固定部材の第一軸部が係入する筒部を設けて、該筒部の周壁の一部に固定部材の第一軸部の係入口となる切欠部を形成する一方、その先端部が当該切欠部側に臨む弾性ロック片を上記凸部の下壁の先端側にその基端部が連結された状態をもって設けると共に、該弾性ロック片の第一軸部が摺接する面は上下方向に撓み得るように第一軸部の摺接方向に対して下り傾斜しており、第一軸部と筒部及び第二軸部と軸受孔部の夫々は、第二軸部が軸受孔部に係入した状態で、可動部材を該第二軸部を中心として固定部材側へ回転させて、第一軸部を上記弾性ロック片に宛がう状態を得て、そのまま、可動部材を固定部材側に押し込むと、第一軸部が弾性ロック片に摺接しながら該弾性ロック片を押し退けて、上記切欠部から筒部内に係入する構成を採用した。
【０００６】
請求項２記載の発明は、請求項１を前提として、第一軸部の付根に筒部の先端縁が当接する段部を設け、筒部の外側に上記筒部の先端縁と段部との当接状態を覆う覆い壁を設ける構成を採用した。
【０００８】
依って、請求項１記載の発明にあっては、可動部材を固定部材に回転可能に軸支する場合には、第一軸部の先端を弾性ロック片に宛がいながら軽く押し込むだけで、第一軸部は弾性ロック片を撓ませながら押し退けて、係入口となる切欠部から筒部内に係入されると同時に、弾性ロック片が原形に復帰して、その先端部で切欠部を塞ぐので、これにより、可動部材が固定部材に対して簡単に軸支されることとなる。又、第一軸部が弾性ロック片の下り傾斜する面に摺接して、弾性ロック片を容易に押し退けることが可能となるので、可動部材の固定部材に対する組付作業がより簡単となる。更に、固定部材の凹部側に軸受孔部と第一軸部を設けたので、ヒンジ機構自体を凹部内に隠せることが可能となり、見栄えが良い。且つ、可動部材に固定部材の凹部に嵌め込まれる凸部を設けたので、可動部材の回転時の回転規制として機能させることができると共に、弾性ロック片が凸部の下壁に連設されているので、可動部材の組み付け時に、凸部と凹部のガイドを得て、第一軸部の先端を弾性ロック片に確実に摺接させることができる。
【０００９】
請求項２記載の発明にあっては、筒部の先端縁と段部の当接状態を覆い壁で覆ったので、可動部材の回転に伴い生じる磨耗粉を隠すことが可能となる。
【００１０】
【発明の実施の形態】
以下、本発明を図示する好適な実施の形態に基づいて詳述すれば、該実施の形態に係るヒンジ機構も、自動車用のカップホルダーに応用したもので、当該対象となるカップホルダー自体の構造は、従来と同様に、図１に示す如く、自動車のドアトリム側に固定される固定部材たるベース部材１と、該ベース部材１の一端部側に回転可能に軸支される可動部材たるアーム部材２とから成る。
【００１１】
そして、ベース部材１に関しては、図２にも示す如く、その中央にカップの側面を支持する湾曲部３を形成して、該湾曲部３を挟んだ両端部の上下方向に連続する凹部４・５を設け、一端部側の凹部４を画成する上壁に軸受孔部６を穿設し、同下壁に軸部７を突設すると共に、該軸部７の付根に後述するアーム部材２の筒部１３の先端縁を当接する円盤状の段部８を設け、且つ、上壁寄りの内面に３つの規制溝９ａ・９ｂ・９ｃを有するガイド壁９を一体に設ける構成となっている。尚、図中、１０はベース部材１の底壁で、カップホルダーとしての使用時には、ここでカップの底部を載置支持することとなる。
【００１２】
アーム部材２に関しては、図３・図４にも示す如く、その中央にカップの側面を支持する湾曲部１１を形成して、該湾曲部１１の一端部側の上面に上記ベース部材１の軸受孔部６に係入する軸部１２を突設すると共に、同一端部の下面側に上記ベース部材１側の軸部７を係入する筒部１３を設けて、該筒部１３の周壁の一部に軸部７の係入口となる切欠部１４を形成し、その先端部が当該切欠部１４側に臨む弾性ロック片１５を設け、且つ、筒部１３の外側に上記筒部１３の先端縁と段部８の当接状態を覆う筒状の覆い壁１６を設ける構成となっている。
【００１３】
尚、上記弾性ロック片１５は、ベース部材１の一端部側の凹部４に嵌め込まれる凸部１７側にその基端部を連設して、上下方向に撓み得る構成となっているが、該基端部側は肉薄となし、先端部側を肉厚となして、弾性ロック片１５の軸部７が摺接する下面を軸部７の摺接方向に対して下り傾斜させる構成となっている。
【００１４】
又、上記凸部１７の上部側には、圧縮コイルばね１８で付勢される規制ピン１９を装着して、該規制ピン１９を上記ガイド壁９の３つの規制溝９ａ・９ｂ・９ｃに選択的に係止させることにより、アーム部材２を使用位置と不使用位置とに位置決めできる構成となしている。
【００１５】
依って、斯かる構成のカップホルダーを組み付ける場合には、ベース部材１側の軸受孔部６内にアーム部材２側の軸部１２を係入しながら、軸部７を弾性ロック片１５の下り傾斜する下面に宛がう状態を得て、そのまま、アーム部材２の凸部１７をベース部材１の対応する凹部４内に押し込むと、図５のＡに示す如く、軸部７が弾性ロック片１５の下り傾斜する下面を摺接しながら、弾性ロック片１５を上方に押し退けて、係入口たる切欠部１４から筒部１３内に係入すると同時に、図５のＢに示す如く、軸部７の筒部１３に対する係入後は、弾性ロック片１５が原形に復帰して、その先端部で切欠部１４を塞ぐので、これにより、軸部７の筒部１３からの抜け外れを自動的に防止して、アーム部材２をベース部材１に対していとも簡単に組み付けることが可能となる。
【００１６】
そして、実際の使用に際して、図６に示す如く、ベース部材１をドアトリム（図示せず）側に固定して、規制ピン１９がガイド壁９の図中右側の規制溝９ａに係止するまで、アーム部材２を閉塞方向に回転すると、アーム部材２の他端部がベース部材１の他端部に形成される凹部５内に嵌り込んで、その不使用状態が得られる。又、ベース部材１を開放方向に回転して、今度は、図７に示す如く、規制ピン１９を図中中央と左側の規制溝９ｂ・９ｃに係止させると、ベース部材１の底壁１０に載置された状態をもって、径の異なるカップＣ１・Ｃ２がベース部材１の湾曲部３とアーム部材２の湾曲部１１間に保持されることとなる。
【００１７】
又、長期使用によっては、特に、ベース部材１側の軸部７とアーム部材２側の筒部１３とが擦れ合って磨耗粉を生じる場合があるが、図８に示す如く、筒部１３の先端縁が軸部７の段部８に当接すると同時に、該当接状態を筒部１３よりも長い覆い壁１６で覆っている関係で、磨耗粉を隠すことが可能となる。
【００１８】
尚、上記実施の形態にあっては、ベース部材１側に軸部７を設け、アーム部材２側に該軸部７を係入する筒部１３を設けたものであるが、逆に、ベース部材１側に筒部１３を設け、アーム部材２側に軸部７を設けても、同様な作用効果を期待できることは言うまでもない。
【００１９】
又、実施の形態にあっては、アーム部材２の一端部上面側に軸部１２を設け、同下面側に筒部１３と弾性ロック片１５等を設けたものであるが、本発明は、これに限定されるものではなく、図９に示す如く、アーム部材２の上面側にも下面側と同様な筒部１３と弾性ロック片１５等を設けて、ベース部材１側の対応部位に軸部７を設けることも実施に応じ任意である。特に、この場合には、アーム部材２をベース部材１に組み付ける場合には、上下とも、軸部７を弾性ロック片１５に摺接させながら押し込むだけで、アーム部材２をベース部材１側に軸支することが可能となるので、その組付作業が一層容易となる。
【００２０】
【発明の効果】
以上の如く、本発明は、上記構成の採用により、可動部材を固定部材に回転可能に軸支する場合には、第一軸部の先端を弾性ロック片に宛がいながら軽く押し込むだけで、第一軸部は弾性ロック片を撓ませながら押し退けて、係入口となる切欠部から筒部内に係入されると同時に、弾性ロック片が原形に復帰して、その先端部で切欠部を塞ぐので、これにより、可動部材が固定部材に対して簡単に軸支されることとなる。又、第一軸部が弾性ロック片の下り傾斜する面に摺接して、弾性ロック片を容易に押し退けることが可能となるので、可動部材の固定部材に対する組付作業がより簡単となる。更に、固定部材の凹部側に軸受孔部と第一軸部を設けたので、ヒンジ機構自体を凹部内に隠せることが可能となり、見栄えが良い。且つ、可動部材に固定部材の凹部に嵌め込まれる凸部を設けたので、可動部材の回転時の回転規制として機能させることができると共に、弾性ロック片が凸部の下壁に連設されているので、可動部材の組み付け時に、凸部と凹部のガイドを得て、第一軸部の先端を弾性ロック片に確実に摺接させることができる。
【図面の簡単な説明】
【図１】本発明の実施の形態に係るヒンジ機構を応用したカップホルダーを示す分解斜視図である。
【図２】ベース部材の横断面図である。
【図３】（Ａ）はアーム部材の平面図、（Ｂ）は同底面図、（Ｃ）は同縦断面図である。
【図４】筒部と弾性ロック片との関係を示す要部斜視図である。
【図５】（Ａ）（Ｂ）はアーム部材をベース部材に組み付ける工程を示す縦断面図である。
【図６】カップホルダーの不使用状態を示す横断面図である。
【図７】（Ａ）は小径なカップを保持した状態を示す横断面図、（Ｂ）は大径なカップを保持した状態を示す横断面図である。
【図８】筒部の先端縁と段部の当接状態を覆い壁で覆った状態を説明する要部拡大断面図である。
【図９】本発明の他例を示す断面図である。
【符号の説明】
１ベース部材（固定部材）
２アーム部材（可動部材）
３湾曲部
４一端部側の凹部
５他端部側の凹部
６軸受孔部
７軸部
８段部
９ガイド壁
９ａ規制溝
９ｂ規制溝
９ｃ規制溝
１０底壁
１１湾曲部
１２軸部
１３筒部
１４切欠部
１５弾性ロック片
１６覆い壁
１７凸部
１８圧縮コイルばね
１９規制ピン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a hinge mechanism that can be applied to, for example, a cup holder of an automobile.
[0002]
[Prior art]
As a cup holder provided with a conventional hinge mechanism, there is one shown in Japanese Patent Laid-Open No. 2000-16138.
Although not shown specifically, the conventional cup holder is composed of a base member fixed to the door trim side of the automobile and an arm member rotatably supported on one end side of the base member. The base member is formed with two recesses in the vertical direction at one end thereof, and a bearing hole is formed in the upper and lower walls defining the respective recesses. Two convex portions to be fitted into the respective concave portions are formed, and a shaft portion that engages with the bearing hole portion protrudes from the upper and lower surfaces of each convex portion.
[0003]
For this reason, in actual use, bearings in which the protruding portions on the arm member side are fitted into the concave portions on the base member side and the shaft portions projecting on the upper and lower surfaces of the respective convex portions are formed in the upper and lower walls of the concave portions. When engaged in the hole, the arm member is pivotally supported by the base member so that the arm member is pivotally supported. After obtaining such a state, the base member is fixed to the door trim side and the arm member is rotated in the opening direction. Then, the cup is held between the base member and the arm member with being placed on the bottom wall of the base member. Therefore, in the conventional cup holder, when the arm member pivotally supported by the base member is rotated in the opening direction and the closing direction, the use state and the non-use state can be easily obtained.
[0004]
[Problems to be solved by the invention]
However, in the conventional hinge mechanism, in order to pivotally support the arm member on the base member, the upper and lower surfaces of each convex portion are fitted while the convex portions on the arm member side are fitted into the concave portions on the base member side. Since the shaft portion projecting from the shaft must be forcedly inserted into the bearing hole portion formed in the upper and lower walls of the concave portion, there is a dislike that the assembly workability is inferior.
[0005]
[Means for Solving the Problems]
The present invention was developed in order to effectively solve the problems of the conventional hinge mechanism. The invention according to claim 1 is a hinge mechanism in which a movable member is rotatably supported by a fixed member. The member is provided with a concave portion continuous in the vertical direction on one end side thereof, and a bearing hole portion is formed in the upper wall defining the concave portion, and a first shaft portion is projected from the lower wall, and the movable member Is a second shaft that is provided on one end thereof with a convex portion that is fitted in the concave portion of the fixing member in the vertical direction, and is engaged with the bearing hole portion of the fixing member on the upper wall that defines the convex portion. A cylindrical portion in which the first shaft portion of the fixing member is engaged with the lower wall, and a portion of the peripheral wall of the cylindrical portion serves as an engagement inlet for the first shaft portion of the fixing member. While forming the notch, the elastic locking piece with the tip facing the notch is connected to the tip of the bottom wall of the convex part. The surface of the elastic lock piece that is in sliding contact with the first shaft portion is inclined downward with respect to the sliding contact direction of the first shaft portion so as to bend in the vertical direction, Each of the cylindrical portion, the second shaft portion, and the bearing hole portion rotates the movable member around the second shaft portion toward the fixed member side with the second shaft portion engaged with the bearing hole portion. When the movable member is pushed into the fixed member side as it is, the first shaft portion slides against the elastic lock piece and pushes out the elastic lock piece. A configuration in which the cut-out portion is inserted into the cylindrical portion is adopted.
[0006]
According to a second aspect of the present invention, on the premise of the first aspect, a step portion with which the tip edge of the tube portion abuts is provided at the root of the first shaft portion, and the tip edge and step portion of the tube portion are provided outside the tube portion. The structure which provided the cover wall which covers the contact state of this was employ | adopted.
[0008]
Therefore, in the first aspect of the present invention, when the movable member is rotatably supported on the fixed member, the first shaft portion is only pushed lightly while being in contact with the elastic lock piece. One shaft part is pushed away while bending the elastic lock piece, and at the same time, the elastic lock piece returns to its original shape from the cutout part that becomes the entrance, and the cutout part is closed by the tip part. As a result, the movable member is simply pivotally supported with respect to the fixed member. In addition, since the first shaft portion is in sliding contact with the downwardly inclined surface of the elastic lock piece and the elastic lock piece can be easily pushed away, the assembly work of the movable member with respect to the fixed member becomes easier. Furthermore, since the bearing hole portion and the first shaft portion are provided on the concave portion side of the fixing member, the hinge mechanism itself can be hidden in the concave portion, and the appearance is good. And since the convex part fitted in the recessed part of a fixed member was provided in the movable member, while being able to function as rotation regulation at the time of rotation of a movable member, the elastic lock piece is connected with the lower wall of the convex part. Therefore, at the time of assembling the movable member, it is possible to obtain a guide for the convex portion and the concave portion, and to reliably bring the tip of the first shaft portion into sliding contact with the elastic lock piece.
[0009]
In the invention according to claim 2, since the contact state between the tip edge of the cylindrical portion and the stepped portion is covered with the covering wall, it is possible to hide the abrasion powder generated with the rotation of the movable member.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, if the present invention is described in detail based on a preferred embodiment illustrated, the hinge mechanism according to the embodiment is also applied to a cup holder for an automobile, and the structure of the target cup holder itself. As in the prior art, as shown in FIG. 1, a base member 1 as a fixing member fixed to the door trim side of an automobile, and an arm member as a movable member rotatably supported on one end of the base member 1 It consists of two.
[0011]
As for the base member 1, as shown in FIG. 2, a curved portion 3 that supports the side surface of the cup is formed at the center, and concave portions 4 that are continuous in the vertical direction at both ends sandwiching the curved portion 3 are formed. 5, a bearing hole 6 is formed in the upper wall defining the recess 4 on one end side, a shaft 7 is projected from the lower wall, and an arm member to be described later at the root of the shaft 7. The disc-shaped step portion 8 that abuts the leading edge of the second cylindrical portion 13 is provided, and the guide wall 9 having three restriction grooves 9a, 9b, and 9c is integrally provided on the inner surface near the upper wall. Yes. In the figure, reference numeral 10 denotes a bottom wall of the base member 1, and when used as a cup holder, the bottom of the cup is placed and supported here.
[0012]
As shown in FIGS. 3 and 4, the arm member 2 is formed with a curved portion 11 that supports the side surface of the cup at the center, and the bearing of the base member 1 is formed on the upper surface on one end side of the curved portion 11. A shaft portion 12 that engages with the hole portion 6 protrudes, and a cylindrical portion 13 that engages the shaft portion 7 on the base member 1 side is provided on the lower surface side of the same end portion, and a peripheral wall of the cylindrical portion 13 is provided. A notch 14 serving as an entrance for the shaft 7 is formed in part, an elastic locking piece 15 is provided with the tip facing the notch 14, and the tip of the tube 13 is outside the tube 13. A cylindrical covering wall 16 that covers the contact state between the edge and the step portion 8 is provided.
[0013]
The elastic lock piece 15 has a configuration in which the base end portion is continuously provided on the convex portion 17 side to be fitted in the concave portion 4 on the one end portion side of the base member 1 and can be bent in the vertical direction. The base end side is thin, the tip end side is thick, and the bottom surface of the elastic lock piece 15 that is in sliding contact with the shaft portion 7 is inclined downward with respect to the sliding contact direction of the shaft portion 7. .
[0014]
Further, a restriction pin 19 that is urged by a compression coil spring 18 is mounted on the upper side of the convex portion 17, and the restriction pin 19 is selected as the three restriction grooves 9 a, 9 b, 9 c of the guide wall 9. Therefore, the arm member 2 can be positioned at the use position and the non-use position by being locked.
[0015]
Therefore, when the cup holder having such a configuration is assembled, the shaft portion 7 is moved down the elastic lock piece 15 while the shaft portion 12 on the arm member 2 side is engaged in the bearing hole portion 6 on the base member 1 side. When a state of reaching the inclined lower surface is obtained and the convex portion 17 of the arm member 2 is pushed into the corresponding concave portion 4 of the base member 1 as it is, as shown in FIG. While sliding down the lower inclined surface of 15, the elastic lock piece 15 is pushed upward and engaged into the cylindrical portion 13 from the notch portion 14 serving as an entrance, and at the same time, as shown in FIG. After the engagement with the cylindrical portion 13, the elastic lock piece 15 returns to its original shape and closes the notch portion 14 at its tip, thereby automatically preventing the shaft portion 7 from coming off from the cylindrical portion 13. As a result, the arm member 2 can be assembled to the base member 1 easily. It can be attached to become.
[0016]
In actual use, as shown in FIG. 6, until the base member 1 is fixed to the door trim (not shown) side and the restriction pin 19 is locked in the restriction groove 9 a on the right side of the guide wall 9 in the drawing, When the arm member 2 is rotated in the closing direction, the other end portion of the arm member 2 is fitted into the recess 5 formed in the other end portion of the base member 1, and the unused state is obtained. Further, when the base member 1 is rotated in the opening direction and this time, as shown in FIG. 7, the restriction pin 19 is engaged with the restriction grooves 9b and 9c at the center and the left side in the figure, the bottom wall 10 of the base member 1 is obtained. The cups C <b> 1 and C <b> 2 having different diameters are held between the curved portion 3 of the base member 1 and the curved portion 11 of the arm member 2.
[0017]
In addition, depending on long-term use, the shaft portion 7 on the base member 1 side and the cylindrical portion 13 on the arm member 2 side may rub against each other to generate wear powder. However, as shown in FIG. At the same time that the leading edge abuts against the step portion 8 of the shaft portion 7, the wear powder can be hidden because the corresponding contact state is covered by the covering wall 16 longer than the cylindrical portion 13.
[0018]
In the above embodiment, the shaft portion 7 is provided on the base member 1 side, and the cylindrical portion 13 for engaging the shaft portion 7 is provided on the arm member 2 side. Needless to say, similar effects can be expected even when the cylindrical portion 13 is provided on the member 1 side and the shaft portion 7 is provided on the arm member 2 side.
[0019]
Further, in the embodiment, the shaft portion 12 is provided on the upper surface side of one end portion of the arm member 2, and the cylindrical portion 13 and the elastic lock piece 15 are provided on the lower surface side. However, the present invention is not limited to this, and as shown in FIG. 9, the upper surface side of the arm member 2 is provided with a cylindrical portion 13 and an elastic locking piece 15 similar to those on the lower surface side, and a shaft is attached to the corresponding portion on the base member 1 side. The provision of the part 7 is also optional depending on the implementation. In particular, in this case, when the arm member 2 is assembled to the base member 1, the arm member 2 can be pivoted toward the base member 1 simply by pushing the shaft portion 7 in sliding contact with the elastic lock piece 15 both vertically. Since it can be supported, the assembling work is further facilitated.
[0020]
【The invention's effect】
As described above, according to the present invention, when the movable member is rotatably supported by the fixed member by adopting the above-described configuration, the first shaft portion is only pushed lightly while being addressed to the elastic lock piece. One shaft part is pushed away while bending the elastic lock piece, and at the same time, the elastic lock piece returns to its original shape from the cutout part that becomes the entrance, and the cutout part is closed by the tip part. As a result, the movable member is simply pivotally supported with respect to the fixed member. In addition, since the first shaft portion is in sliding contact with the downwardly inclined surface of the elastic lock piece and the elastic lock piece can be easily pushed away, the assembly work of the movable member with respect to the fixed member becomes easier. Furthermore, since the bearing hole portion and the first shaft portion are provided on the concave portion side of the fixing member, the hinge mechanism itself can be hidden in the concave portion, and the appearance is good. And since the convex part fitted in the recessed part of a fixed member was provided in the movable member, while being able to function as rotation regulation at the time of rotation of a movable member, the elastic lock piece is connected with the lower wall of the convex part. Therefore, at the time of assembling the movable member, it is possible to obtain a guide for the convex portion and the concave portion, and to reliably bring the tip of the first shaft portion into sliding contact with the elastic lock piece.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a cup holder to which a hinge mechanism according to an embodiment of the present invention is applied.
FIG. 2 is a cross-sectional view of a base member.
3A is a plan view of an arm member, FIG. 3B is a bottom view thereof, and FIG. 3C is a longitudinal sectional view thereof.
FIG. 4 is a perspective view of a main part showing a relationship between a cylinder part and an elastic lock piece.
FIGS. 5A and 5B are longitudinal sectional views showing a process of assembling the arm member to the base member. FIGS.
FIG. 6 is a cross-sectional view showing the cup holder in a non-use state.
7A is a cross-sectional view showing a state in which a small-diameter cup is held, and FIG. 7B is a cross-sectional view showing a state in which a large-diameter cup is held.
FIG. 8 is an enlarged cross-sectional view of a main part for explaining a state in which a contact state between a tip edge of a cylindrical portion and a stepped portion is covered with a covering wall.
FIG. 9 is a cross-sectional view showing another example of the present invention.
[Explanation of symbols]
1 Base member (fixing member)
2 Arm member (movable member)
DESCRIPTION OF SYMBOLS 3 Curved part 4 Recessed part 5 on one end side Recessed part 6 on the other end side Bearing hole part 7 Shaft part 8 Step part 9 Guide wall 9a Restricting groove 9b Restricting groove 9c Restricting groove 10 Bottom wall 11 Curved part 12 Shaft part 13 Tube part 14 notch 15 elastic lock piece 16 covering wall 17 convex part 18 compression coil spring 19 regulating pin

Claims

In a hinge mechanism that rotatably supports a movable member on a fixed member, the fixed member is provided with a concave portion continuous in the vertical direction at one end thereof, and a bearing hole is formed in an upper wall that defines the concave portion. At the same time, a first shaft portion is projected on the lower wall, and the movable member is provided with a convex portion that is continuously fitted in the concave portion of the fixed member on one end portion thereof to define the convex portion. A second shaft portion that engages with the bearing hole portion of the fixing member protrudes from the upper wall, and a cylindrical portion that engages the first shaft portion of the fixing member is provided on the lower wall. A cutout portion is formed on a part of the peripheral wall to be an entrance of the first shaft portion of the fixing member, and an elastic lock piece whose front end portion faces the cutout portion is provided on the front end side of the lower wall of the convex portion. The first end is provided so that the end portion is connected, and the surface with which the first shaft portion of the elastic lock piece comes into sliding contact can be bent in the vertical direction. The first shaft portion and the cylindrical portion, and the second shaft portion and the bearing hole portion are movable while the second shaft portion is engaged with the bearing hole portion. When the member is rotated about the second shaft portion toward the fixed member side to obtain a state where the first shaft portion is applied to the elastic lock piece, and the movable member is pushed into the fixed member side as it is, A hinge mechanism characterized in that the shaft portion is configured to push away the elastic lock piece while slidingly contacting the elastic lock piece, and to be engaged into the cylindrical portion from the cutout portion.

A step portion with which the tip edge of the tube portion abuts is provided at the root of the first shaft portion, and a cover wall is provided outside the tube portion to cover the contact state between the tip edge of the tube portion and the step portion. The hinge mechanism according to claim 1.