JP7192157B1 - rotary damper - Google Patents

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JP7192157B1
JP7192157B1 JP2022088512A JP2022088512A JP7192157B1 JP 7192157 B1 JP7192157 B1 JP 7192157B1 JP 2022088512 A JP2022088512 A JP 2022088512A JP 2022088512 A JP2022088512 A JP 2022088512A JP 7192157 B1 JP7192157 B1 JP 7192157B1
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rotary damper
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知寿 藤川
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Origin Co Ltd
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Abstract

【課題】弾性部材と雄部材及び雌部材との間に異物が侵入することが可及的に防止されることで安定的に動作して且つ長寿命であり、更に比較的大きな抵抗トルクをも設定可能な、新規のロータリーダンパーを提供すること。【解決手段】雌螺条１６が形成された穴１８に底壁２０を設け、弾性部材８が穴１８に収容されて底壁２０に支持されるように構成する。【選択図】図４An object of the present invention is to stably operate and have a long service life by preventing foreign matter from entering between an elastic member and a male member and a female member as much as possible, and to have a relatively large resistance torque. To provide a novel configurable rotary damper. A bottom wall (20) is provided in a hole (18) formed with a female thread (16), and an elastic member (8) is accommodated in the hole (18) and supported by the bottom wall (20). [Selection drawing] Fig. 4

Description

本発明は、ロータリーダンパーに関する。 The present invention relates to rotary dampers.

複写機のカバーや炊飯器の蓋等の旋回部材はヒンジ手段を介して本体部に取り付けられ、本体部に対しヒンジ手段を旋回中心として、本体部の上面を覆う閉位置と上面を露呈させる開位置との間で往復旋回自在である。旋回部材が複写機のカバー等の場合、旋回部材は本体部に対して手動で操作される。そのため、旋回部材が開位置から閉位置まで旋回する際には、旋回部材は重力によって加速しながら（つまり付勢されて）旋回する。一方、旋回部材が炊飯器の蓋等の場合、旋回部材は任意の付勢手段によって付勢された状態で閉位置に保持され、適宜の操作によって上記保持が解除されると、旋回部材は付勢されて閉位置から開位置へ旋回する。付勢されて旋回する旋回部材は閉位置又は開位置にて本体部と激しく衝突して損傷する虞があることから、かような衝突を回避するためにロータリーダンパーが用いられることがある。 A rotating member such as a cover of a copier or a lid of a rice cooker is attached to the main body via a hinge means, and is rotated with respect to the main body by the hinge means as a center of rotation. It is reciprocatingly rotatable between positions. If the pivot member is a copier cover or the like, the pivot member is manually operated with respect to the main body. Therefore, when the turning member turns from the open position to the closed position, the turning member turns while being accelerated (that is, biased) by gravity. On the other hand, when the turning member is a lid of a rice cooker or the like, the turning member is held in the closed position while being biased by an arbitrary biasing means, and when the holding is released by an appropriate operation, the turning member is attached. Forced to pivot from the closed position to the open position. A rotary damper is sometimes used to avoid such collisions because the biased pivoting member may collide violently with the main body in the closed or open position and may be damaged.

ロータリーダンパーの一例として、下記特許文献１には、雄螺条が形成された雄部材と、前記雄螺条と螺合する雌螺条が形成された雌部材と、前記雄部材及び前記雌部材の間に介在して前記雄部材及び前記雌部材を付勢する弾性部材とを具備し、前記雄部材が前記雌部材に対して螺進することで、前記弾性部材は圧縮せしめられ、前記雄部材が前記雌部材に対して回転する際の抵抗トルクが漸次増大するロータリーダンパーが開示されている。かようなダンパーは揺動ダンパー又はダンパーヒンジと称されることもある。上述したロータリーダンパーにおいて、雄部材及び雌部材のいずれか一方を旋回部材に、いずれか他方を本体部に夫々連結すれば、付勢されて旋回する旋回部材が閉位置又は開位置にて本体部と激しく衝突することは回避される。 As an example of a rotary damper, Patent Document 1 below discloses a male member having a male thread formed thereon, a female member having a female thread formed thereon to be screwed with the male thread, and the male member and the female member. An elastic member is interposed between and biases the male member and the female member, and the male member is screwed with respect to the female member so that the elastic member is compressed and the male member is compressed. A rotary damper is disclosed in which the resistive torque increases progressively as the member rotates relative to the female member. Such dampers are sometimes referred to as oscillating dampers or damper hinges. In the rotary damper described above, if one of the male member and the female member is connected to the turning member and the other is connected to the main body, the turning member that is urged to turn is in the closed position or the open position of the main body. to avoid violent collisions with

特開平１１－８２５８６号公報JP-A-11-82586

而して、上記特許文献１に開示されたロータリーダンパーにあっては、弾性部材である皿ばねは雄部材に形成された雄螺条の外周面を囲繞した状態で雄部材と雌部材との間に配設されている、つまり弾性部材は雌部材において雌螺条が形成された穴の外側に配設されていることに起因して、弾性部材と雄部材又は雌部材との間にごみや塵等の異物が侵入し、安定的な動作が困難、又は使用寿命が低下する等の虞がある。また、弾性部材によって付勢された雄部材及び雌部材の間で生じる軸方向の力は全て雄螺条及び雌螺条に作用するところ、雄螺条及び雌螺条のねじ径は皿ばねの内径よりも小さく設定されることから雄螺条及び雌螺条の径は小さく、雄螺条及び雌螺条が受ける上記力の単位面積当たりの大きさは大きくなってしまう。そのため、抵抗トルクを増大せしめるべく弾性部材による付勢を強めた場合には、上記力によって雄螺条及び雌螺条が損傷してしまう虞もある。 In the rotary damper disclosed in Patent Document 1, the disc spring, which is an elastic member, surrounds the outer peripheral surface of the male thread formed on the male member, and the male member and the female member are connected. In other words, the elastic member is arranged outside the hole in which the female thread is formed in the female member. There is a risk that foreign matter such as dust and dirt will enter, making it difficult to operate stably or shortening the service life. In addition, the axial force generated between the male and female members urged by the elastic member acts on the male and female threads. Since they are set to be smaller than the inner diameter, the diameters of the male and female threads are small, and the magnitude of the force per unit area that the male and female threads receive increases. Therefore, when the force applied by the elastic member is strengthened in order to increase the resistance torque, the force may damage the male and female threads.

本発明は上記事実に鑑みてなされたものであり、その主たる技術的課題は、弾性部材と雄部材及び雌部材との間に異物が侵入することが可及的に防止されることで安定的に動作して且つ長寿命であり、更に比較的大きな抵抗トルクをも設定可能な、新規且つ改良されたロータリーダンパーを提供することである。 The present invention has been made in view of the above facts, and its main technical problem is to stably prevent foreign matter from entering between the elastic member and the male and female members as much as possible. To provide a new and improved rotary damper which operates smoothly, has a long life, and can set a relatively large resistance torque.

本発明者は、鋭意検討の結果、雌螺条が形成された穴に底壁を設け、弾性部材が穴に収容されて底壁に支持されるように構成することで、上記主たる技術的課題を解決できることを見出した。 As a result of intensive studies, the inventor of the present invention has solved the above main technical problem by providing a bottom wall in a hole in which a female thread is formed, and by constructing the hole so that the elastic member is accommodated in the hole and supported by the bottom wall. found to be able to solve

即ち、本発明によれば、上記主たる技術的課題を解決するロータリーダンパーとして、雄螺条が形成された雄部材と、前記雄螺条と螺合する雌螺条が形成された雌部材と、前記雄部材及び前記雌部材の間に介在して前記雄部材及び前記雌部材を付勢する皿ばねとを具備し、
前記雄部材が前記雌部材に対して螺進することで、前記皿ばねは圧縮せしめられ、前記雄部材が前記雌部材に対して回転する際の抵抗トルクが漸次増大するロータリーダンパーにおいて、
前記雌部材において前記雌螺条が形成された穴には底壁が設けられており、前記皿ばねは前記穴に収容されて前記底壁によって支持され、
前記穴には前記底壁によって支持される円環形状の補助リングも収容されており、前記皿ばねは前記補助リングの内側に配置されてこれによって支持される、ことを特徴とするロータリーダンパーが提供される。 That is, according to the present invention, a rotary damper that solves the above-described main technical problem includes a male member having a male thread formed thereon, a female member having a female thread threadedly engaged with the male thread, a disc spring interposed between the male member and the female member and biasing the male member and the female member;
A rotary damper in which the disc spring is compressed by the male member spiraling with respect to the female member, and resistance torque gradually increases when the male member rotates with respect to the female member,
A bottom wall is provided in the hole in the female member in which the female thread is formed, and the disc spring is accommodated in the hole and supported by the bottom wall ,
An annular auxiliary ring supported by the bottom wall is also accommodated in the hole, and the disk spring is arranged inside and supported by the auxiliary ring. provided.

好ましくは、前記雄部材及び前記底壁には夫々、前記雄螺条及び前記雌螺条の中心軸上で軸方向に貫通する貫通穴が形成されている。前記雄部材の内径は前記皿ばねの内径よりも小さいのが好適である。 Preferably, the male member and the bottom wall are formed with through-holes axially penetrating on central axes of the male thread and the female thread, respectively . Preferably, the inner diameter of the male member is smaller than the inner diameter of the disc spring .

本発明のロータリーダンパーにあっては、弾性部材は雌螺条が形成された穴に収容されることから、弾性部材と雄部材及び雌部材との間に異物が侵入することが可及的に防止され、動作の安定性が良好となり使用寿命も延びる。更に、雄螺条及び雌螺条のねじ径は皿ばねの外径以上となるため、雄螺条及び雌螺条が受ける軸方向の力（弾性部材によって付勢された雄部材及び雌部材の間で生じる軸方向の力）の単位面積当たりの大きさを小さくすることができる。これにより、抵抗トルクを大きく設定するために弾性部材による付勢を強めても、上記力によって雄螺条及び雌螺条が損傷することは防止されるため、大きな抵抗トルクをも設定可能となる。 In the rotary damper of the present invention, since the elastic member is accommodated in the hole in which the female thread is formed, it is possible to prevent foreign matter from entering between the elastic member and the male and female members. It is prevented, the stability of the operation is improved, and the service life is extended. Furthermore, since the thread diameters of the male and female threads are equal to or greater than the outer diameter of the disk spring, the axial force received by the male and female threads (the force exerted by the male and female members urged by the elastic member) The magnitude per unit area of the axial force generated between them can be reduced. As a result, even if the force of the elastic member is increased in order to set a large resistance torque, the male and female threads are prevented from being damaged by the above force, so it is possible to set a large resistance torque. .

本発明に従って構成された好適実施形態のロータリーダンパーの正面図。1 is a front view of a preferred embodiment rotary damper constructed in accordance with the present invention; FIG. 図１に示すロータリーダンパーの側面図。FIG. 2 is a side view of the rotary damper shown in FIG. 1; 図１に示すロータリーダンパーの背面図。FIG. 2 is a rear view of the rotary damper shown in FIG. 1; 図１に示すロータリーダンパーのＡ－Ａ線断面図。FIG. 2 is a cross-sectional view of the rotary damper shown in FIG. 1 along the line AA; 図１に示すロータリーダンパーを構成する各部品の分解斜視図。FIG. 2 is an exploded perspective view of each component constituting the rotary damper shown in FIG. 1; 図１に示すロータリーダンパーにおいて雄部材が雌部材に対して螺進した状態のＡ－Ａ線断面図。FIG. 2 is a cross-sectional view taken along line AA of the rotary damper shown in FIG. 1 in a state where the male member is screwed with respect to the female member;

以下、本発明に従って構成されたロータリーダンパーの好適実施形態を示す添付図面を参照して、更に詳細に説明する。 A more detailed description will now be given with reference to the accompanying drawings showing a preferred embodiment of a rotary damper constructed in accordance with the present invention.

図１乃至図５を参照して説明すると、全体を番号２で示すロータリーダンパーは、雄部材４と、雌部材６と、弾性部材８とを具備する。 1 to 5, a rotary damper generally designated 2 comprises a male member 4, a female member 6 and an elastic member 8. As shown in FIG.

雄部材４は所要軸方向長さを有し、外周面には軸方向に向かって螺旋状に延びる雄螺条１０が形成されている。雄螺条１０は右螺子であって雄部材４の外周面全体に亘って存在する。図示の実施形態においては、雄部材４には雄螺条１０の中心軸上で軸方向に貫通する断面円形の貫通穴１２が形成されている。雄部材４の軸方向片側面の径方向中間部には、軸方向他側に向かって軸方向に延びる円形で有底の接続穴１４が周方向に等角度間隔をおいて４つ形成されている。この接続穴１４を介して雄部材４は図示しない旋回部材に連結せしめられてこれと一体的に回転する。 The male member 4 has a required axial length, and a male thread 10 extending spirally in the axial direction is formed on its outer peripheral surface. The male thread 10 is a right-handed screw and exists over the entire outer peripheral surface of the male member 4 . In the illustrated embodiment, a through hole 12 having a circular cross section is formed in the male member 4 so as to extend axially through the male thread 10 on the central axis thereof. Four circular bottomed connection holes 14 extending in the axial direction toward the other axial side are formed at equal angular intervals in the circumferential direction in the radially intermediate portion of one axial side surface of the male member 4 . there is Through this connection hole 14, the male member 4 is connected to a turning member (not shown) and rotates integrally therewith.

図示の実施形態においては、雌部材６は円筒形状であり、内周面には雄部材４の雄螺条１０と螺合する雌螺条１６が形成されている。雌螺条１６が形成された穴（この穴を「ねじ穴」と称して番号１８で示す。図５を参照されたい。）には底壁２０が設けられている。図示の実施形態においては、底壁２０は軸方向に対して垂直であって、雌部材６の軸方向片側端に設けられている。底壁２０の中心には軸方向に貫通する円形の貫通穴２２が形成されている。雌部材６の外周面には軸方向に直線状に延びる断面弧状の凹溝２４が周方向に等角度間隔をおいて３つ形成されている。この凹溝２４を介して雌部材６は図示しない壁等の本体部に固定される。 In the illustrated embodiment, the female member 6 has a cylindrical shape, and a female thread 16 to be screwed with the male thread 10 of the male member 4 is formed on the inner peripheral surface. A bottom wall 20 is provided in a hole in which the female thread 16 is formed (this hole is called a "screw hole" and indicated by number 18; see FIG. 5). In the illustrated embodiment, the bottom wall 20 is perpendicular to the axial direction and is provided at one axial end of the female member 6 . A circular through hole 22 is formed through the center of the bottom wall 20 in the axial direction. Three recessed grooves 24 having an arcuate cross-section extending linearly in the axial direction are formed on the outer peripheral surface of the female member 6 at equal angular intervals in the circumferential direction. Through this groove 24, the female member 6 is fixed to a main body such as a wall (not shown).

弾性部材８は雄部材４及び雌部材６の間に介在して雄部材４及び雌部材６を付勢する。本発明のロータリーダンパーにおいては、弾性部材８が雌部材６において雌螺条１６が形成された穴（つまりねじ穴１８）に収容されて底壁２０によって支持されることが重要である。弾性部材８は皿ばねであって（以下では、皿ばねを番号８で示す）、複数（図示の実施形態においては４つ）の皿ばね８が軸方向に積層して配置されている。図４を参照することによって理解されるとおり、皿ばね８は何らの力も付与されていない自由状態においては円錐台形状をしており、裾側が底壁２０によって軸方向に支持される。皿ばね８の内径は雄部材４の内径（つまり貫通穴１２の径）よりも大きい。ねじ穴１８には底壁２０によって支持される円環形状の補助リング２６も収容されており、皿ばね８は補助リング２６の内側に配置される。補助リング２６の軸方向幅は、軸方向に積層された複数の皿ばね８の各々の板厚の合計と略同一である。これにより、皿ばね８は雌螺条１６ではなく補助リング２６によって径方向から支持されるため、皿ばね８がねじ穴１８内で倒れることが防止される。皿ばね８及び補助リング２６が所要とおりにねじ穴１８に配置された後に、雄部材４の雄螺条１０が雌部材６の雌螺条１６に螺合せしめられる。これにより、皿ばね８及び補助リング２６は雄部材４の軸方向端面と雌部材６の底壁２０との間の閉空間に配置される。 The elastic member 8 is interposed between the male member 4 and the female member 6 to bias the male member 4 and the female member 6 . In the rotary damper of the present invention, it is important that the elastic member 8 is accommodated in the hole (that is, the threaded hole 18) in which the female thread 16 is formed in the female member 6 and supported by the bottom wall 20. As shown in FIG. The elastic member 8 is a disk spring (hereinbelow, the disk spring is denoted by number 8), and a plurality of (four in the illustrated embodiment) disk springs 8 are arranged in layers in the axial direction. As understood by referring to FIG. 4, the disc spring 8 has a truncated cone shape in a free state where no force is applied, and the skirt side is axially supported by the bottom wall 20 . The inner diameter of the disc spring 8 is larger than the inner diameter of the male member 4 (that is, the diameter of the through hole 12). The threaded hole 18 also accommodates an annular auxiliary ring 26 supported by the bottom wall 20 , the disk spring 8 being located inside the auxiliary ring 26 . The axial width of the auxiliary ring 26 is substantially the same as the total plate thickness of each of the plurality of axially laminated disc springs 8 . As a result, the disc spring 8 is supported radially by the auxiliary ring 26 instead of the female thread 16 , so that the disc spring 8 is prevented from collapsing in the screw hole 18 . After the Belleville spring 8 and auxiliary ring 26 have been placed in the threaded hole 18 as desired, the male thread 10 of the male member 4 is screwed onto the female thread 16 of the female member 6 . Thereby, the disc spring 8 and the auxiliary ring 26 are arranged in the closed space between the axial end face of the male member 4 and the bottom wall 20 of the female member 6 .

次に、図４と共に図６を参照してロータリーダンパー２の作動について説明する。図４に示す状態から、雄部材４が雌部材６に対して時計方向（図４の左側から見て）に回転すると、雄部材４は雌部材６に対して螺進する。つまり雄部材４の雄螺条１０と雌部材６の雌螺条１６との螺合によって、雄部材４は雌部材６に対して紙面上右方向に進行する。そうすると、図４と図６とを比較参照することによって理解されるとおり、雄部材４の軸方向端面と雌部材６の底壁２０との間の閉空間の軸方向距離が漸次低減せしめられ、雄部材４の軸方向端面が皿ばね８を軸方向に押圧してこれを圧縮する。つまり、雄部材４は皿ばね８による付勢に抗して進行する。このとき、雄部材４が進行するに従って弾性体である皿ばね８の変位量は漸次増大することから、フックの法則により、雄部材４が皿ばね８から受ける抵抗も漸次増大する。これにより、雄部材４が雌部材６に対して回転する際の抵抗トルクが漸次増大する。 Next, the operation of the rotary damper 2 will be described with reference to FIG. 6 together with FIG. When the male member 4 rotates clockwise (as seen from the left side of FIG. 4) with respect to the female member 6 from the state shown in FIG. That is, the male member 4 advances in the right direction on the paper surface with respect to the female member 6 by screwing the male thread 10 of the male member 4 and the female thread 16 of the female member 6 together. Then, as understood by comparing FIGS. 4 and 6, the axial distance of the closed space between the axial end surface of the male member 4 and the bottom wall 20 of the female member 6 is gradually reduced, The axial end face of the male member 4 presses axially against the disc spring 8 to compress it. That is, the male member 4 advances against the urging force of the disc spring 8 . At this time, as the male member 4 advances, the amount of displacement of the disc spring 8, which is an elastic body, gradually increases. As a result, the resistance torque when the male member 4 rotates with respect to the female member 6 gradually increases.

本発明のロータリーダンパーにあっては、皿ばね８（弾性部材）は雌螺条１６が形成されたねじ穴１８に収容されることから、皿ばね８（弾性部材）と雄部材４及び雌部材６との間に異物が侵入することが可及的に防止され、動作の安定性が良好となり使用寿命も延びる。更に、雄螺条１０及び雌螺条１６のねじ径は皿ばね８（弾性部材）の外径以上となるため、雄螺条１０及び雌螺条１６が受ける軸方向の力（図示の実施形態では皿ばね８である弾性部材によって付勢された雄部材４及び雌部材６の間で生じる軸方向の力）の単位面積当たりの大きさを小さくする、換言すれば上記力を分散する、ことができる。これにより、抵抗トルクを大きく設定するために皿ばね８（弾性部材）による付勢を強めても、上記力によって雄螺条１０及び雌螺条１６が損傷することは防止されるため、大きな抵抗トルクをも設定可能となる。図示の実施形態においては、雄部材４及び底壁２０には夫々、雄螺条１０及び雌螺条１６の中心軸上で軸方向に貫通する貫通穴１２、２２が形成されていることから、所要用途によっては貫通穴１２、２２に配線を通すことができる。なお、貫通穴１２、２２を閉塞すれば、皿ばね８（弾性部材）と雄部材４及び雌部材６との間に異物が侵入することをより一層効果的に防止することができる。 In the rotary damper of the present invention, since the disc spring 8 (elastic member) is accommodated in the screw hole 18 having the female thread 16 formed therein, the disc spring 8 (elastic member), the male member 4 and the female member 6 is prevented as much as possible from entering, stability of operation is improved, and service life is extended. Furthermore, since the thread diameters of the male thread 10 and the female thread 16 are equal to or greater than the outer diameter of the disk spring 8 (elastic member), the axial force received by the male thread 10 and the female thread 16 (in the illustrated embodiment) Then, the size per unit area of the axial force generated between the male member 4 and the female member 6 urged by the elastic member, which is the disk spring 8, is reduced, in other words, the force is dispersed. can be done. This prevents the male thread 10 and the female thread 16 from being damaged by the above force even if the force applied by the disk spring 8 (elastic member) is strengthened in order to set a large resistance torque. Torque can also be set. In the illustrated embodiment, through holes 12 and 22 are formed in the male member 4 and the bottom wall 20, respectively, so as to extend axially through the central axes of the male thread 10 and the female thread 16. Wiring can be passed through the through holes 12, 22 depending on the required application. If the through holes 12 and 22 are closed, it is possible to more effectively prevent foreign matter from entering between the disk spring 8 (elastic member) and the male member 4 and female member 6 .

以上、本発明に従って構成されたロータリーダンパーについて添付した図面を参照して詳述したが、本発明は上述した実施形態に限定されるものではなく、本発明を逸脱しない範囲内において適宜の修正や変更が可能である。例えば、図示の実施形態においては、弾性部材である皿ばねは軸方向に積層して複数配置されていたが、皿ばねは単一であってもよい。また皿ばねの材質も金属製に限定されず合成樹脂製であってもよい。雄部材及び雌部材も任意の材質で良い。 As described above, the rotary damper constructed according to the present invention has been described in detail with reference to the attached drawings. Change is possible. For example, in the illustrated embodiment, a plurality of disc springs, which are elastic members, are stacked in the axial direction, but a single disc spring may be provided. Also, the material of the disk spring is not limited to metal, and synthetic resin may be used. The male and female members may also be made of any material.

２：ロータリーダンパー
４：雄部材
６：雌部材
８：弾性部材
１０：雄螺条
１６：雌螺条
１８：（ねじ）穴
２０：底壁
２６：補助リング
2: Rotary damper 4: Male member 6: Female member 8: Elastic member 10: Male thread 16: Female thread 18: (Screw) hole 20: Bottom wall 26: Auxiliary ring

Claims (3)

雄螺条が形成された雄部材と、前記雄螺条と螺合する雌螺条が形成された雌部材と、前記雄部材及び前記雌部材の間に介在して前記雄部材及び前記雌部材を付勢する皿ばねとを具備し、
前記雄部材が前記雌部材に対して螺進することで、前記皿ばねは圧縮せしめられ、前記雄部材が前記雌部材に対して回転する際の抵抗トルクが漸次増大するロータリーダンパーにおいて、
前記雌部材において前記雌螺条が形成された穴には底壁が設けられており、前記皿ばねは前記穴に収容されて前記底壁によって支持され、
前記穴には前記底壁によって支持される円環形状の補助リングも収容されており、前記皿ばねは前記補助リングの内側に配置されてこれによって支持される、ことを特徴とするロータリーダンパー。 a male member formed with a male thread; a female member formed with a female thread screwed with the male thread; and the male member and the female member interposed between the male member and the female member. and a disc spring for biasing the
A rotary damper in which the disc spring is compressed by the male member spiraling with respect to the female member, and resistance torque gradually increases when the male member rotates with respect to the female member,
A bottom wall is provided in the hole in the female member in which the female thread is formed, and the disc spring is accommodated in the hole and supported by the bottom wall ,
A rotary damper according to claim 1, wherein said hole also accommodates an annular auxiliary ring supported by said bottom wall, said disc spring being arranged inside said auxiliary ring and supported by said auxiliary ring . 前記雄部材及び前記底壁には夫々、前記雄螺条及び前記雌螺条の中心軸上で軸方向に貫通する貫通穴が形成されている、請求項１に記載のロータリーダンパー。 2. The rotary damper according to claim 1 , wherein the male member and the bottom wall are formed with through-holes axially penetrating on central axes of the male thread and the female thread, respectively. 前記雄部材の内径は前記皿ばねの内径よりも小さい、請求項２に記載のロータリーダンパー。 3. The rotary damper according to claim 2 , wherein the inner diameter of said male member is smaller than the inner diameter of said disc spring.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1025388A (en) * 1910-12-03 1912-05-07 Highland T Finnell Shock-absorber for vehicles.
JPS58134571U (en) * 1982-03-03 1983-09-10 八木　克己 Door stop operating mechanism
JPH1182586A (en) * 1997-09-08 1999-03-26 Nakagawa Electric Ind Co Ltd Speed governor device for rotor
JP2004316912A (en) * 2003-04-14 2004-11-11 Arturo Salice Spa Spiral motion type attenuating device
US20080265729A1 (en) * 2007-04-30 2008-10-30 Emanuel Netzer Furniture item having a furniture body
CN101520078A (en) * 2009-04-10 2009-09-02 罗世春 Shock absorber for bicycle or baby carrier
JP2013053635A (en) * 2011-08-31 2013-03-21 Oiles Corp Damper

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1025388A (en) * 1910-12-03 1912-05-07 Highland T Finnell Shock-absorber for vehicles.
JPS58134571U (en) * 1982-03-03 1983-09-10 八木　克己 Door stop operating mechanism
JPH1182586A (en) * 1997-09-08 1999-03-26 Nakagawa Electric Ind Co Ltd Speed governor device for rotor
JP2004316912A (en) * 2003-04-14 2004-11-11 Arturo Salice Spa Spiral motion type attenuating device
US20080265729A1 (en) * 2007-04-30 2008-10-30 Emanuel Netzer Furniture item having a furniture body
CN101520078A (en) * 2009-04-10 2009-09-02 罗世春 Shock absorber for bicycle or baby carrier
JP2013053635A (en) * 2011-08-31 2013-03-21 Oiles Corp Damper

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