JP2020089446A

JP2020089446A - Turning body holding mechanism and damper unit using the same

Info

Publication number: JP2020089446A
Application number: JP2018226849A
Authority: JP
Inventors: 貴志横尾; Takashi Yokoo
Original assignee: Fuji Latex Co Ltd
Current assignee: Fuji Latex Co Ltd
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2020-06-11
Anticipated expiration: 2038-12-03
Also published as: JP7265746B2

Abstract

To provide a turning body holding mechanism that is capable of holding a turning body in a predetermined rotation position by suppressing abnormal noise and simplifying a structure.SOLUTION: A turning body holding mechanism includes: a columnar rotating member 15 rotating around a shaft in conjunction with a turning shaft; elastic pieces 27a, 27b arranged oppositely to an outer surface 15c of the rotating member 15; first pins 17a, 17b protruding from the outer face of the rotating member 15; second pins 35a, 35b protruded from an inner face 27c of the elastic pieces 27a, 27b opposed to an outer surface 15c of the rotating member 15, and getting over the first pins 17a, 17b by the elastic deformation of the elastic pieces 27a, 27b according to the rotation of the rotating member 15; and bulging parts 19a, 19b and 39a, 39b provided at both sides in the circumferential direction of the rotating member 15 to the first pins 17a, 17b and the second pins 35a, 35b, and reducing a step difference by the protrusion of the first pins 17a, 17b and the second pins 35a, 35b.SELECTED DRAWING: Figure 5

Description

本発明は、トイレの便座等の回動体を所定の回動位置に保持するための回動体の保持機構及びこれを用いたダンパーユニットに関する。 The present invention relates to a rotating body holding mechanism for holding a rotating body such as a toilet seat in a predetermined rotating position, and a damper unit using the same.

従来の回動体の保持機構としては、例えば特許文献１に記載の回転ダンパにおける自立機構がある。 As a conventional rotating body holding mechanism, for example, there is a self-supporting mechanism in a rotary damper described in Patent Document 1.

この自立機構は、回転ダンパのダンパ軸に外表面から突出する長棒からなる第１ニードルを設け、ダンパ軸の外側に嵌め込まれる円筒状の外枠のスリットから内側に突出する長棒からなる第２ニードルを設け、さらに外枠を包囲して第２ニードルを内側に付勢する板状のリングばねを設けている。 In this self-supporting mechanism, the damper shaft of the rotary damper is provided with a first needle made of a long rod protruding from the outer surface, and the first rod made of a long rod protruding inward from a slit of a cylindrical outer frame fitted to the outside of the damper shaft. Two needles are provided, and a plate-shaped ring spring that surrounds the outer frame and biases the second needle inward is provided.

そして、ダンパ軸が回転して第１ニードルと第２ニードルとが接触すると、リングばねを弾性変形させることにより第２ニードルが第１ニードルを乗り越えるようになっている。 When the damper shaft rotates and the first needle and the second needle come into contact with each other, the ring spring is elastically deformed so that the second needle gets over the first needle.

これにより、ダンパ軸は、所定のトルクを与えない限り逆回転できず、ダンパ軸に支持された便座等の回動体は、所定の回動位置に保持され、例えば自立した状態となる。 As a result, the damper shaft cannot rotate in the reverse direction unless a predetermined torque is applied, and the rotating body such as the toilet seat supported by the damper shaft is held at a predetermined rotating position and becomes, for example, in a self-supporting state.

かかる自立機構では、第２ニードルが第１ニードルを乗り越える際の節度感をもって回動体を確実に所定の回動位置に保持することができる。 With such a self-supporting mechanism, it is possible to reliably hold the rotating body at a predetermined rotating position with a sense of moderation when the second needle rides over the first needle.

しかし、第２ニードルが第１ニードルを乗り越えた際に、第２ニードルがダンパ軸にリングばねの弾性力によって衝突して異音が発生するという問題があった。 However, when the second needle crosses over the first needle, there is a problem that the second needle collides with the damper shaft by the elastic force of the ring spring to generate abnormal noise.

また、ダンパ軸の外側に嵌め込まれる外枠をさらにリングばねで包囲するため、構造が複雑化するという問題があった。 Further, since the outer frame fitted to the outside of the damper shaft is further surrounded by the ring spring, there is a problem that the structure becomes complicated.

特許第２７３９１６４号公報Japanese Patent No. 2739164

解決しようとする問題点は、回動体を所定の回動位置で保持するために異音が発生していたと共に構造が複雑化していた点にある。 The problem to be solved is that abnormal noise is generated and the structure is complicated because the rotating body is held at a predetermined rotating position.

本発明は、異音を抑制すると共に構造を簡素化して回動体を所定の回動位置で保持するために、回動軸を中心に回動する回動体を所定の回動位置で保持する回動体の保持機構であって、前記回動軸と連動して軸周りに回転する円柱状の回転部材と、該回転部材の外面に対向して配置された弾性片と、前記回転部材の外面から突出する被乗越え部と、前記回転部材の外面に対向する前記弾性片の内面から突出し前記回転部材の回転に応じて前記被乗越え部を前記弾性片の弾性変形により乗り越える乗越え部と、前記被乗越え部及び前記乗越え部の少なくとも一方に対し前記回転部材の周方向における両側に設けられ前記被乗越え部及び前記乗越え部の少なくとも一方の前記突出による段差を小さくする膨出部とを備えたことを回動体の保持機構の最も主な特徴とする。 The present invention, in order to suppress abnormal noise, simplify the structure, and hold the rotating body at a predetermined rotating position, a rotating body that rotates around a rotating shaft is held at a predetermined rotating position. A moving body holding mechanism, comprising a cylindrical rotating member that rotates around an axis in conjunction with the rotating shaft, an elastic piece that is arranged to face an outer surface of the rotating member, and an outer surface of the rotating member. A projecting crossover portion and a crossover portion projecting from the inner surface of the elastic piece facing the outer surface of the rotary member and riding over the crossover portion by elastic deformation of the elastic piece in response to rotation of the rotary member; And a bulge portion which is provided on both sides in the circumferential direction of the rotating member with respect to at least one of the crossover portion and the crossover portion and which reduces a step due to the protrusion of at least one of the crossover portion and the crossover portion. The main feature of the moving body holding mechanism.

本発明では、構造を簡素化しつつ回動体を所定の回動位置に保持することができる。しかも、乗越え部が被乗越え部を乗り越えたときに、乗越え部又は被乗越え部が膨出部に当接することによって乗越え部の回転部材への衝突による異音を抑制することができる。 According to the present invention, the rotating body can be held at a predetermined rotating position while simplifying the structure. Moreover, when the overpassing portion passes over the overpassed portion, the overpassing portion or the overpassed portion abuts the bulging portion, so that abnormal noise due to collision of the overpassing portion with the rotating member can be suppressed.

回転ダンパーに保持機構を設けたダンパーユニットの正面図である（実施例１）。FIG. 3 is a front view of a damper unit in which a rotary damper is provided with a holding mechanism (Example 1). 図１のダンパーユニットのＩＩ−ＩＩ線断面図である（実施例１）。FIG. 2 is a sectional view taken along line II-II of the damper unit in FIG. 1 (Example 1). 図１のダンパーユニットの右側面図である（実施例１）。It is a right view of the damper unit of FIG. 1 (Example 1). 図１のダンパーユニットの左側面図である（実施例１）。It is a left view of the damper unit of FIG. 1 (Example 1). 図２のダンパーユニットのＶ−Ｖ線断面図である（実施例１）。FIG. 5 is a sectional view taken along line VV of the damper unit in FIG. 2 (Example 1). 図５の要部拡大図である（実施例１）。It is a principal part enlarged view of FIG. 5 (Example 1). 図２のダンパーユニットのＶＩＩ−ＶＩＩ線断面図である（実施例１）。It is the VII-VII sectional view taken on the line of the damper unit of FIG. 2 (Example 1). 保持機構を適用したダンパーユニットの断面図である（実施例２）。It is a sectional view of a damper unit to which a holding mechanism is applied (Example 2). 保持機構を適用したダンパーユニットの断面図である（実施例３）。It is a sectional view of a damper unit to which a holding mechanism is applied (Example 3). 保持機構を適用したダンパーユニットの要部断面図である（実施例４）。It is a principal part sectional view of the damper unit to which the holding mechanism is applied (Example 4).

異音を抑制すると共に構造を簡素化して回動体を所定の回動位置で保持するという目的を、回転部材の外面から突出する乗越え部及び弾性片の内面から突出する被乗越え部の少なくとも一方に対し、突出による段差を小さくする膨出部を設けた回転体の保持機構によって実現した。 For the purpose of suppressing abnormal noise and simplifying the structure to hold the rotating body at a predetermined rotating position, at least one of the riding-over portion projecting from the outer surface of the rotating member and the riding-over portion projecting from the inner surface of the elastic piece. On the other hand, it is realized by a rotating body holding mechanism provided with a bulging portion that reduces the step due to the protrusion.

すなわち、回転体の保持機構は、回動軸を中心に回動する回動体を所定の回動位置で保持する回動体の保持機構であって、回動軸と連動して軸周りに回転する円柱状の回転部材と、回転部材の外面に対向して配置された弾性片と、回転部材の外面から突出する被乗越え部と、回転部材の外面に対向する弾性片の内面から突出し回転部材の回転に応じて被乗越え部を弾性片の弾性変形により乗り越える乗越え部と、被乗越え部及び乗越え部の少なくとも一方に対し回転部材の周方向における両側に設けられ被乗越え部及び乗越え部の少なくとも一方の突出による段差を小さくする膨出部とを備えている。 That is, the rotating body holding mechanism is a rotating body holding mechanism that holds the rotating body that rotates about the rotating shaft at a predetermined rotating position, and rotates about the axis in conjunction with the rotating shaft. A cylindrical rotating member, an elastic piece arranged to face the outer surface of the rotating member, a crossover portion protruding from the outer surface of the rotating member, and an elastic piece protruding from the inner surface of the elastic piece facing the outer surface of the rotating member. Depending on the rotation, the overriding portion is overridden by elastic deformation of the elastic piece, and at least one of the overriding portion and the overriding portion provided on both sides in the circumferential direction of the rotating member with respect to at least one of the overriding portion and the overriding portion. And a bulge portion that reduces a step due to the protrusion.

膨出部は、被乗越え部及び乗越え部の少なくとも一方に対し周方向に近接するにつれて段差を漸次小さくするスロープ状であってもよい。 The bulging portion may have a slope shape in which a step is gradually reduced as it approaches in the circumferential direction with respect to at least one of the riding-over portion and the riding-over portion.

また、回転部材を内部に収容し回転部材の外周に位置する筒状壁部を備え、弾性片は、筒状壁部に周方向に沿って設けられた一対のスリットにより区画され筒状壁部に一体の板バネである構成であってもよい。 Further, the rotary member is provided with a tubular wall portion which is housed inside and is located on the outer periphery of the rotary member, and the elastic piece is divided by a pair of slits provided in the tubular wall portion along the circumferential direction to form the tubular wall portion. The leaf spring may be integral with the above.

乗越え部は、板バネの周方向での中央部に設けられ、板バネの中央部及び両端部は、板バネの他の部分に対して板厚が増加され、膨出部は、少なくとも乗越え部の両側に設けられ、板バネの中央部の板厚が増加された部分からなる構成であってもよい。 The ride-over portion is provided at the central portion in the circumferential direction of the leaf spring, the thickness of the central portion and both end portions of the leaf spring is increased with respect to other portions of the leaf spring, and the bulge portion is at least the ride-over portion. May be provided on both sides of the plate spring, and the plate spring may have a central portion with an increased plate thickness.

筒状壁部は、断面円形又は断面楕円形であってもよい。 The tubular wall portion may have a circular cross section or an elliptical cross section.

ケースは、筒状壁部の開口部に取り付けられ回転部材の端部を覆う蓋部を備え、筒状壁部と蓋部との間には、弾性片の変位方向に対する交差方向に隙間が設けられている構成であってもよい。 The case includes a lid part that is attached to the opening part of the tubular wall part and covers the end part of the rotating member. A gap is provided between the tubular wall part and the lid part in a direction intersecting with the displacement direction of the elastic piece. It may be configured.

乗越え部及び被乗越え部は、それぞれ回転部材及び弾性片とは別体に形成されると共に回転部材及び弾性片に支持された耐摩耗性のピンであってもよい。 The riding-over portion and the riding-over portion may be wear-resistant pins that are formed separately from the rotating member and the elastic piece and are supported by the rotating member and the elastic piece, respectively.

回転部材及び前記弾性片は、ピンを保持する保持凹部を備え、保持凹部の少なくとも一部は、膨出部により区画される構成であってもよい。 The rotating member and the elastic piece may include a holding recess that holds the pin, and at least a part of the holding recess may be defined by the bulging portion.

回動体の保持機構は、回転ダンパーと共にダンパーユニットを構成してもよい。この場合、回転ダンパーは、ダンピングトルクを生じさせる本体部と、この本体部に対して回転自在に支持されたダンパー軸とを備え、保持機構の回転部材は、ダンパー軸に一体回転可能に支持される。 The rotating body holding mechanism may constitute a damper unit together with the rotary damper. In this case, the rotary damper includes a main body that produces a damping torque and a damper shaft that is rotatably supported by the main body, and the rotating member of the holding mechanism is supported by the damper shaft so as to be integrally rotatable. It

図１は、回転ダンパーに保持機構を設けたダンパーユニットの正面図、図２は、図１のダンパーユニットのＩＩ−ＩＩ線断面図、図３及び図４は、図１のダンパーユニットの右側面図及び左側面図、図５は、図２のダンパーユニットのＶ−Ｖ線断面図であり、図６は、図５の要部拡大図、図７は、図２のＶＩＩ−ＶＩＩ線断面図である。 1 is a front view of a damper unit in which a holding mechanism is provided on a rotary damper, FIG. 2 is a sectional view taken along the line II-II of the damper unit of FIG. 1, and FIGS. 3 and 4 are right side surfaces of the damper unit of FIG. 5 and a left side view, FIG. 5 is a sectional view taken along line VV of the damper unit shown in FIG. 2, FIG. 6 is an enlarged view of an essential part of FIG. 5, and FIG. 7 is a sectional view taken along line VII-VII of FIG. Is.

本実施例のダンパーユニット１は、図１〜図７のように、ケース３と、回転ダンパー５と、保持機構７とで構成されている。このダンパーユニット１は、例えば便座や便座カバー等の回動軸を中心に回動する回動体を所定の回動位置で保持し、且つ回動位置から回動前の初期位置に戻る際の回動体の回動を緩やかに行わせるものである。 As shown in FIGS. 1 to 7, the damper unit 1 according to the present embodiment includes a case 3, a rotary damper 5, and a holding mechanism 7. The damper unit 1 holds, for example, a rotating body that rotates around a rotating shaft such as a toilet seat or a toilet seat cover at a predetermined rotation position, and also rotates when returning from the rotation position to the initial position before rotation. The moving body is gently rotated.

なお、ダンパーユニット１は、便座等の回動体への適用に限られるものではなく、他の回動体への適用も可能である。また、本実施例では、回転ダンパー５と共に保持機構７をダンパーユニット１として適用しているが、回転ダンパー５を省略することも可能である。 The damper unit 1 is not limited to being applied to a rotating body such as a toilet seat, but can be applied to other rotating bodies. Further, in this embodiment, the holding mechanism 7 is applied as the damper unit 1 together with the rotary damper 5, but the rotary damper 5 may be omitted.

ケース３は、ポリアセタール、ポリブチレンテレフタレート、ナイロン等の樹脂によって形成され、ダンパー保持部９及び保持機構７の筒状壁部１１とが軸方向で一体に設けられている。なお、軸方向とは、後述する回転部材１５の回転軸Ｘに沿った方向をいう。本実施例では、回転部材１５の回転軸Ｘが回動体の回転軸と一致している。 The case 3 is made of a resin such as polyacetal, polybutylene terephthalate, or nylon, and the damper holding portion 9 and the tubular wall portion 11 of the holding mechanism 7 are integrally provided in the axial direction. The axial direction means a direction along a rotation axis X of the rotating member 15 described later. In this embodiment, the rotation axis X of the rotating member 15 coincides with the rotation axis of the rotating body.

ダンパー保持部９は、円筒形状に形成され、内部に回転ダンパー５を収容する。ダンパー保持部９の一端は、回転ダンパー５を位置決める一端壁部９ａが設けられている。一端壁部９ａには、ダンパー保持部９の内外を貫通する開口部９ｂが形成されている。 The damper holding portion 9 is formed in a cylindrical shape and accommodates the rotary damper 5 therein. One end wall portion 9a for positioning the rotary damper 5 is provided at one end of the damper holding portion 9. An opening 9b penetrating the inside and outside of the damper holding portion 9 is formed in the one end wall portion 9a.

ダンパー保持部９の他端には、フランジ部１３を介して筒状壁部１１が一体に設けられている。なお、筒状壁部１１については、保持機構７の一部として後述する。 A cylindrical wall portion 11 is integrally provided at the other end of the damper holding portion 9 via a flange portion 13. The tubular wall portion 11 will be described later as a part of the holding mechanism 7.

回転ダンパー５は、本体部５ａからダンパー軸５ｂが突出して形成されている。本体部５ａは、ダンパー軸５ｂから入力されたトルクに対するダンピングトルクを生じさせる。かかるダンピングトルクにより、回動位置から回動前の初期位置に戻る際の回動体の回動を緩やかに行わせることを可能とする。 The rotary damper 5 is formed with a damper shaft 5b protruding from the main body 5a. The main body portion 5a produces damping torque with respect to the torque input from the damper shaft 5b. The damping torque makes it possible to gently rotate the rotating body when returning from the rotating position to the initial position before the rotation.

この本体部５ａは、ダンパー保持部９の内部形状に応じた円柱形状に形成され、ダンパー保持部９内に収容されている。本体部５ａの一端には、突起部５ｃが設けられている。突起部５ｃは、ダンパー保持部９の一端壁部９ａの開口部９ｂに対して挿通により係合している。この係合により、回転ダンパー５の回り止めを行っている。本体部５ａの他端には、ダンパー軸５ｂが設けられている。 The main body portion 5 a is formed in a cylindrical shape corresponding to the internal shape of the damper holding portion 9 and is housed in the damper holding portion 9. A protrusion 5c is provided at one end of the main body 5a. The protruding portion 5c is engaged with the opening 9b of the one end wall portion 9a of the damper holding portion 9 by insertion. By this engagement, the rotation damper 5 is prevented from rotating. A damper shaft 5b is provided at the other end of the body portion 5a.

ダンパー軸５ｂは、本体部５ａに対して回転自在に支持され、回動体の回動に応じたトルクが保持機構７の回転部材１５を介して入力される。 The damper shaft 5b is rotatably supported by the main body 5a, and torque according to the rotation of the rotating body is input via the rotating member 15 of the holding mechanism 7.

保持機構７は、回転部材１５と、筒状壁部１１とを備えている。 The holding mechanism 7 includes a rotating member 15 and a cylindrical wall portion 11.

回転部材１５は、回動体の回動軸と連動して軸周りに回転するものである。この回転部材１５は、ポリブチレンテレフタレート等の樹脂によって、円柱状に形成されている。回転部材１５の外径は、回転ダンパー５の本体部５ａの外径とほぼ同一に形成されている。 The rotating member 15 rotates about the axis in conjunction with the rotating shaft of the rotating body. The rotating member 15 is made of a resin such as polybutylene terephthalate and has a cylindrical shape. The outer diameter of the rotary member 15 is formed to be substantially the same as the outer diameter of the main body portion 5a of the rotary damper 5.

回転部材１５は、一端部がダンパー保持部９内に入れ込まれ、径方向において位置決められている。また、回転部材１５の一端部は、ダンパー保持部９内で回転ダンパー５の本体部５ａに当接している。これにより、回転部材１５は、回転ダンパー５をダンパー保持部９の一端壁部９ａとの間で位置決めている。 One end of the rotary member 15 is inserted into the damper holding portion 9 and is positioned in the radial direction. Further, one end of the rotary member 15 is in contact with the main body 5 a of the rotary damper 5 inside the damper holding portion 9. Thereby, the rotary member 15 positions the rotary damper 5 with the one end wall portion 9 a of the damper holding portion 9.

回転部材１５の一端側の軸心部には、嵌合凹部１５ａが設けられており、嵌合凹部１５ａ内に回転ダンパー５のダンパー軸５ｂが嵌合している。これにより、回転部材１５は、ダンパー軸５ｂに一体回転可能に支持されている。 A fitting recess 15a is provided in the shaft center portion on one end side of the rotating member 15, and the damper shaft 5b of the rotary damper 5 is fitted in the fitting recess 15a. As a result, the rotating member 15 is supported by the damper shaft 5b so as to be integrally rotatable.

回転部材１５の他端側の軸心部には、結合軸１５ｂが設けられている。結合軸１５ｂは、回転部材１５の他端から突設され、回動体側に結合される。これにより、回転部材１５を回動体の回動軸と連動して軸周りに回転可能とする。 A coupling shaft 15b is provided at the shaft center portion on the other end side of the rotating member 15. The coupling shaft 15b is projected from the other end of the rotating member 15 and is coupled to the rotating body side. As a result, the rotary member 15 can be rotated about the axis in conjunction with the rotary shaft of the rotary body.

本実施例のダンパーユニット１では、結合軸１５ｂにより回動体を回転自在に支持するようになっている。ただし、回転部材１５は回動体の回転軸と連動すればよいので、結合軸１５ｂは回動体を支持せずに回動体の回転軸と連動するようにギア等によって連結する構成としてもよい。 In the damper unit 1 of this embodiment, the rotating body is rotatably supported by the coupling shaft 15b. However, since the rotary member 15 may be interlocked with the rotary shaft of the rotary body, the coupling shaft 15b may be connected by a gear or the like so as to interlock with the rotary shaft of the rotary body without supporting the rotary body.

回転部材１５の外面には、径方向に突出した凸部１５ｃが設けられている。凸部１５ｃは、ダンパー保持部９の他端側の端面９ｃに当接しつつ、後述する筒状壁部１１の一方のスリット２９ａ内に配置されている。これにより、回転部材１５は、スリット２９ａを利用して軸方向への抜け止めがなされている。 The outer surface of the rotating member 15 is provided with a convex portion 15c protruding in the radial direction. The convex portion 15c is arranged in one slit 29a of the cylindrical wall portion 11 described later while contacting the end surface 9c on the other end side of the damper holding portion 9. As a result, the rotary member 15 is prevented from coming off in the axial direction by utilizing the slit 29a.

また、回転部材１５の外面１５ｃには、被乗越え部としての第１ピン１７ａ，１７ｂが設けられている。本実施例では、第１ピン１７ａ，１７ｂが回転部材１５の外面１５ｃの周方向で１８０度ずれた２ヶ所に配置されている。ただし、第１ピン１７ａ，１７ｂは、回転部材１５の外面１５ｃの１ヶ所に設けてもよい。 Further, the outer surface 15c of the rotating member 15 is provided with first pins 17a and 17b as over-ridden portions. In the present embodiment, the first pins 17a and 17b are arranged at two positions that are offset by 180 degrees in the circumferential direction of the outer surface 15c of the rotating member 15. However, the first pins 17a and 17b may be provided at one location on the outer surface 15c of the rotating member 15.

各第１ピン１７ａ，１７ｂは、回転部材１５とは別体に形成されると共に回転部材１５に支持され、回転部材１５の外面から径方向に突出した構成となっている。なお、被乗越え部は、第１ピン１７ａ，１７ｂに代えて、回転部材１５と一体の突起部として形成することも可能である。従って、被乗越え部は、回転部材１５に対する突起部であればよい。 Each of the first pins 17a and 17b is formed separately from the rotating member 15, is supported by the rotating member 15, and is configured to project radially from the outer surface of the rotating member 15. It should be noted that the riding-over portion may be formed as a protrusion integral with the rotating member 15 instead of the first pins 17a and 17b. Therefore, the riding-over portion may be a protrusion for the rotating member 15.

第１ピン１７ａ，１７ｂは、耐摩耗性の材料、例えばステンレス等の金属からなり、円柱状に形成されている。なお、第１ピン１７ａ，１７ｂの材質は、樹脂等とすることも可能である。また、第１ピン１７ａ，１７ｂは、球状に形成することも可能である。 The first pins 17a and 17b are made of a wear resistant material, for example, a metal such as stainless steel, and are formed in a cylindrical shape. The material of the first pins 17a and 17b may be resin or the like. The first pins 17a and 17b can also be formed in a spherical shape.

この第１ピン１７ａ，１７ｂは、回転部材１５の外面１５ｃに設けられた保持凹部１５ｄに保持されている。保持凹部１５ｄは、回転部材１５の外面１５ｃから径方向に凹状に形成されている。保持凹部１５ｄは、軸方向の一端が閉止され、軸方向の他端が回転部材１５の端面１５ｅ上に開放されている。また、保持凹部１５ｄの径方向の開口縁部１５ｆは、後述する膨出部１９ａ，１９ｂによって形成されている。これにより、保持凹部１５ｄの一部は、膨出部１９ａ，１９ｂによって区画されている。 The first pins 17a and 17b are held in a holding recess 15d provided on the outer surface 15c of the rotating member 15. The holding recess 15d is formed in a radial shape from the outer surface 15c of the rotary member 15. One end in the axial direction of the holding recess 15d is closed, and the other end in the axial direction is open on the end surface 15e of the rotating member 15. The radial opening edge 15f of the holding recess 15d is formed by bulges 19a and 19b described later. As a result, a part of the holding recess 15d is partitioned by the bulges 19a and 19b.

この保持凹部１５ｄに対し、第１ピン１７ａ，１７ｂは、軸方向で挿入されている。この第１ピン１７ａ，１７ｂは、その一端が保持凹部１５ｄの軸方向の一端に突き当たった状態で、他端が保持凹部１５ｄの端面１５ｅから突出して後述する蓋部４１の裏面に対向している。また、径方向において、第１ピン１７ａ，１７ｂは、開口縁部１５ｆから一部が突出している。 The first pins 17a and 17b are axially inserted into the holding recess 15d. One end of each of the first pins 17a and 17b abuts on one end of the holding recess 15d in the axial direction, and the other end thereof projects from the end surface 15e of the holding recess 15d and faces the rear surface of the lid 41 described later. .. Further, in the radial direction, the first pins 17a and 17b partially project from the opening edge portion 15f.

回転部材１５の周方向において、保持凹部１５ｄの両側には、膨出部１９ａ，１９ｂが設けられている。従って、膨出部１９ａ，１９ｂは、被乗越え部である第１ピン１７ａ，１７ｂに対し回転部材１５の周方向における両側に設けられている。この膨出部１９ａ，１９ｂは、第１ピン１７ａ，１７ｂの回転部材１５の外面１５ｃからの突出による段差を小さくする。 Swelling portions 19a and 19b are provided on both sides of the holding recess 15d in the circumferential direction of the rotating member 15. Therefore, the bulging portions 19a and 19b are provided on both sides in the circumferential direction of the rotating member 15 with respect to the first pins 17a and 17b, which are the over-ridden portions. The bulging portions 19a and 19b reduce the step due to the protrusion of the first pins 17a and 17b from the outer surface 15c of the rotating member 15.

本実施例の膨出部１９ａ，１９ｂは、回転部材１５と一体に設けられ、第１ピン１７ａ，１７ｂに対して周方向に近接するにつれて段差を漸次小さくするスロープ状に形成されている。なお、膨出部１９ａ，１９ｂは、回転部材１５とは別体に設け、回転部材１５に結合する構成としてもよい。 The bulging portions 19a and 19b of the present embodiment are provided integrally with the rotating member 15, and are formed in a slope shape in which the step difference is gradually reduced as they approach the first pins 17a and 17b in the circumferential direction. The bulging portions 19a and 19b may be provided separately from the rotating member 15 and connected to the rotating member 15.

膨出部１９ａ，１９ｂの膨出量は、後述する異音を低減可能な範囲で適宜変更することが可能である。ただし、膨出部１９ａ，１９ｂの膨出量は、最大でも後述するように第２ピン３５ａ，３５ｂが第１ピン１７ａ，１７ｂを乗り越える際に、両者が摺動する部分を避けるように設定される。 The bulging amounts of the bulging portions 19a and 19b can be appropriately changed within a range in which abnormal noise described later can be reduced. However, the bulging amount of the bulging portions 19a and 19b is set so as to avoid a sliding portion between the second pins 35a and 35b when the second pins 35a and 35b pass over the first pins 17a and 17b, as will be described later. It

筒状壁部１１は、回転部材１５を内部に収容し、回転部材１５の外周に位置するようになっている。筒状壁部１１は、断面楕円形の筒状であり、内部の回転部材１５を収容する収容空間Ｓもほぼ楕円形となっている。なお、筒状壁部１１は、断面円形にすることも可能である。 The tubular wall portion 11 accommodates the rotating member 15 inside and is positioned on the outer periphery of the rotating member 15. The tubular wall portion 11 has a tubular shape with an elliptical cross section, and the accommodation space S for accommodating the rotating member 15 therein is also substantially elliptical. The tubular wall portion 11 may have a circular cross section.

本実施例の筒状壁部１１は、相互に対向した短径上の円弧部２１ａ，２１ｂと、円弧部２１ａ，２１ｂに隣接して相互に対向した長径上の角部２３ａ，２３ｂとで構成されている。円弧部２１ａ，２１ｂは、それぞれ筒状壁部１１の中心を曲率中心とする１／４円の円弧状に形成されている。角部２３ａ，２３ｂは、円弧部２１ａ，２１ｂから相互に交差する方向に延びる連結部２５ａ，２５ｂを円弧部２１ａ，２１ｂよりも曲率半径が小さい弧状部２５ｃによって結合することで構成されている。 The tubular wall portion 11 of the present embodiment is composed of arcuate portions 21a and 21b having a short diameter and facing each other, and corner portions 23a and 23b having a long diameter which are adjacent to the arcuate portions 21a and 21b and face each other. Has been done. The circular arc portions 21a and 21b are each formed in a circular arc shape of a quarter circle having the center of curvature as the center of the cylindrical wall portion 11. The corner portions 23a, 23b are configured by connecting the connecting portions 25a, 25b extending from the arc portions 21a, 21b in a direction intersecting with each other by the arc-shaped portion 25c having a smaller radius of curvature than the arc portions 21a, 21b.

筒状壁部１１の円弧部２１ａ，２１ｂの中央部及び角部２３ａ，２３ｂの弧状部２５ｃは、他の部分に対して板厚が増加している。 The central portions of the arcuate portions 21a and 21b of the tubular wall portion 11 and the arcuate portions 25c of the corner portions 23a and 23b are thicker than the other portions.

この筒状壁部１１には、弾性片２７ａ，２７ｂが一体に設けられている。 Elastic pieces 27a and 27b are integrally provided on the tubular wall portion 11.

弾性片２７ａ，２７ｂは、回転部材１５の外面１５ｃに対向して配置されている。本実施例の弾性片２７ａ，２７ｂは、筒状壁部１１に周方向に沿って設けられた一対のスリット２９ａ，２９ｂにより区画され、筒状壁部１１に一体の板バネとなっている。 The elastic pieces 27a and 27b are arranged to face the outer surface 15c of the rotating member 15. The elastic pieces 27a, 27b of the present embodiment are partitioned by a pair of slits 29a, 29b provided in the tubular wall portion 11 along the circumferential direction, and are elastic springs integrated with the tubular wall portion 11.

弾性片２７ａ，２７ｂの周方向の長さは、スリット２９ａ，２９ｂの長さによって設定される。本実施例において、各弾性片２７ａ，２７ｂは、筒状壁部１１の円弧部２１ａ，２１ｂから両側の連続する角部２３ａ，２３ｂの連結部２５ａ，２５ｂにわたる部分を、筒状壁部１１に設けられたスリット２９ａ，２９ｂによって軸方向両側で切り離した両持ちの板バネ状部分となっている。なお、弾性片２７ａ，２７ｂは、周方向の一端を筒状壁部１１から切り離して片持ち状にしてもよい。 The circumferential lengths of the elastic pieces 27a and 27b are set by the lengths of the slits 29a and 29b. In this embodiment, each elastic piece 27a, 27b has a portion extending from the arcuate portions 21a, 21b of the tubular wall portion 11 to the connecting portions 25a, 25b of the continuous corner portions 23a, 23b on both sides on the tubular wall portion 11. The slits 29a and 29b are provided to form a leaf spring-like portion having both ends that are separated on both sides in the axial direction. The elastic pieces 27a, 27b may be cantilevered by separating one end in the circumferential direction from the cylindrical wall portion 11.

弾性片２７ａ，２７ｂの周方向の中央部３１及び両端部３３ａ，３３ｂは、弾性片２７ａ，２７ｂの他の部分に対して板厚が増加されている。本実施例において、弾性片２７ａ，２７ｂの中央部３１は、中央部３１に対する周方向の両側から漸次肉厚が増加している。弾性片２７ａ，２７ｂの両端部３３ａ，３３ｂは、それぞれ筒状壁部１１の角部２３ａ，２３ｂの弧状部２５ｃにわたって漸次肉厚が増加している。 The circumferential center portion 31 and both end portions 33a, 33b of the elastic pieces 27a, 27b are increased in plate thickness with respect to the other portions of the elastic pieces 27a, 27b. In the present embodiment, the central portions 31 of the elastic pieces 27a and 27b gradually increase in thickness from both sides in the circumferential direction with respect to the central portions 31. Both ends 33a, 33b of the elastic pieces 27a, 27b have a wall thickness gradually increasing over the arcuate portions 25c of the corners 23a, 23b of the tubular wall portion 11, respectively.

弾性片２７ａ，２７ｂの中央部３１には、乗越え部としての第２ピン３５ａ，３５ｂを保持する保持凹部３７が形成されている。従って、本実施例では、板バネである弾性片２７ａ，２７ｂの周方向での中央部に第２ピン３５ａ，３５ｂが設けられた構成となっている。 In the central portion 31 of the elastic pieces 27a and 27b, a holding concave portion 37 that holds the second pins 35a and 35b as the overcoming portion is formed. Therefore, in this embodiment, the second pins 35a and 35b are provided at the central portions of the elastic pieces 27a and 27b, which are leaf springs, in the circumferential direction.

保持凹部３７は、回転部材１５の保持凹部１５ｄと同様に構成され、弾性片２７ａ，２７ｂの内面２７ｃから径方向に凹状に形成されている。保持凹部３７の周方向の両側では、弾性片２７ａ，２７ｂの板厚が増加された部分からなる膨出部３９ａ，３９ｂが形成されている。 The holding recess 37 is configured similarly to the holding recess 15d of the rotating member 15, and is formed in a radial shape from the inner surfaces 27c of the elastic pieces 27a and 27b. On both sides of the holding recess 37 in the circumferential direction, bulging portions 39a, 39b formed by portions of the elastic pieces 27a, 27b in which the plate thickness is increased are formed.

従って、膨出部３９ａ，３９ｂは、第２ピン３５ａ，３５ｂに対して周方向に近接するにつれて第２ピン３５ａ，３５ｂの突出による段差を漸次小さくするスロープ状となっている。また、弾性片２７ａ，２７ｂの保持凹部３７は、全体として膨出部３９ａ，３９ｂによって区画されている。 Therefore, the bulging portions 39a, 39b have a slope shape that gradually reduces the step difference due to the protrusion of the second pins 35a, 35b as they approach the second pins 35a, 35b in the circumferential direction. Further, the holding recess 37 of the elastic pieces 27a, 27b is divided by the bulges 39a, 39b as a whole.

この弾性片２７ａ，２７ｂの保持凹部３７に対し、第２ピン３５ａ，３５ｂが軸方向で挿入されて保持され、径方向で保持凹部３７の開口縁部３７ａから一部が突出している。 The second pins 35a and 35b are axially inserted and held in the holding recesses 37 of the elastic pieces 27a and 27b, and a part of the second pins 35a and 35b projects in the radial direction from the opening edge 37a of the holding recess 37.

従って、第２ピン３５ａ，３５ｂは、回転部材１５の外面１５ｃに対向する弾性片２７ａ，２７ｂの内面２７ｃから突出している。この第２ピン３５ａ，３５ｂは、回転部材１５の回転に応じて、第１ピン１７ａ，１７ｂを弾性片２７ａ，２７ｂの弾性変形により乗り越える構成となっている。 Therefore, the second pins 35a and 35b project from the inner surfaces 27c of the elastic pieces 27a and 27b facing the outer surface 15c of the rotating member 15. The second pins 35a and 35b are configured to overcome the first pins 17a and 17b by elastic deformation of the elastic pieces 27a and 27b according to the rotation of the rotating member 15.

弾性片２７ａ，２７ｂの弾性変形は、筒状壁部１１の楕円形状の短径方向に変位することで行われる。 The elastic deformation of the elastic pieces 27a and 27b is performed by displacing the tubular wall portion 11 in the direction of the short diameter of the elliptical shape.

なお、第２ピン３５ａ，３５ｂは、第１ピン１７ａ，１７ｂと同一構成となっている。また、乗り越え部としての第２ピン３５ａ，３５ｂも、第１ピン１７ａ，１７ｂと同様、弾性片２７ａ，２７ｂと一体に設けたり、或いは球状等とすることも可能である。従って、乗越え部は、弾性片２７ａ，２７ｂに対する突起部であればよい。 The second pins 35a and 35b have the same structure as the first pins 17a and 17b. Further, the second pins 35a, 35b as the overcoming portion may be provided integrally with the elastic pieces 27a, 27b, or may be spherical, like the first pins 17a, 17b. Therefore, the overriding portion may be a protrusion for the elastic pieces 27a and 27b.

第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂを共に球状とする場合は、第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂの形状や位置決めの精度が要求されるため、第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂの一方をピン状にするのが好ましい。 When both the first pins 17a and 17b and the second pins 35a and 35b are spherical, the first pins 17a and 17b and the second pins 35a and 35b are required to have a precise shape and positioning accuracy. , 17b and one of the second pins 35a, 35b are preferably pin-shaped.

筒状壁部１１は、開口部１１ａに取り付けられた蓋部４１を備えている。蓋部４１は、第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂの抜け止めを行わせる。蓋部４１には、係合突起４１ａが設けられており、係合突起４１ａは、筒状壁部１１のスリット２９ｂに径方向で入り込んで係合している。これにより、本実施例では、スリット２９ｂを利用して蓋部４１を固定している。 The tubular wall portion 11 includes a lid portion 41 attached to the opening 11a. The lid 41 prevents the first pins 17a and 17b and the second pins 35a and 35b from coming off. The lid portion 41 is provided with an engagement protrusion 41a, and the engagement protrusion 41a is inserted into the slit 29b of the tubular wall portion 11 in the radial direction and engaged with the slit 29b. As a result, in this embodiment, the lid 41 is fixed by using the slit 29b.

係合突起４１ａは、軸方向において第２ピン３５ａ，３５ｂに係合して、第２ピン３５ａ，３５ｂの抜け止めを行っている。また、蓋部４１は、その裏面が第１ピン１７ａ，１７ｂに隣接し、それら第１ピン１７ａ，１７ｂの抜け止めを行っている。 The engagement protrusion 41a engages with the second pins 35a and 35b in the axial direction to prevent the second pins 35a and 35b from coming off. The back surface of the lid portion 41 is adjacent to the first pins 17a and 17b to prevent the first pins 17a and 17b from coming off.

蓋部４１と筒状壁部１１との間には、弾性片２７ａ，２７ｂの変位方向に対する交差方向に隙間Ｇ１，Ｇ２が設けられている。弾性片２７ａ，２７ｂの変位方向は、筒状壁部１１の短径に沿った方向であり、交差方向は、筒状壁部１１の長径に沿った方向である。 Gaps G1 and G2 are provided between the lid portion 41 and the tubular wall portion 11 in a direction intersecting with the displacement direction of the elastic pieces 27a and 27b. The elastic pieces 27a, 27b are displaced along the minor axis of the tubular wall portion 11, and the intersecting direction is along the major axis of the tubular wall portion 11.

本実施例では、蓋部４１が円形の板状であり、筒状壁部１１の開口部１１ａが楕円形となっており、この形状の相違によって隙間Ｇ１，Ｇ２が形成されている。 In this embodiment, the lid portion 41 has a circular plate shape, the opening 11a of the tubular wall portion 11 has an elliptical shape, and the gaps G1 and G2 are formed due to the difference in shape.

［ダンパーユニットの動作］
本実施例のダンパーユニット１は、初期位置にある便座や便座カバー等の回動体を、手動により所定の回動位置まで回動させると、回動体の回動位置が節度感をもって保持される。 [Operation of damper unit]
In the damper unit 1 of this embodiment, when the rotating body such as the toilet seat or the toilet seat cover in the initial position is manually rotated to a predetermined rotating position, the rotating position of the rotating body is held with a feeling of moderation.

すなわち、本実施例では、保持機構７の回転部材１５が回動体の回動に連動して軸周りに回転し、回動体が所定の回動位置になる直前で、回転部材１５の外面１５ｃから突出する第１ピン１７ａ，１７ｂが筒状壁部１１の弾性片２７ａ，２７ｂの内面２７ｃから突出する第２ピン３５ａ，３５ｂにそれぞれ周方向で突き当る。 That is, in the present embodiment, the rotating member 15 of the holding mechanism 7 rotates about the axis in association with the rotation of the rotating body, and immediately before the rotating body reaches the predetermined rotating position, the rotating member 15 is removed from the outer surface 15c of the rotating member 15. The protruding first pins 17a and 17b abut circumferentially on the second pins 35a and 35b protruding from the inner surfaces 27c of the elastic pieces 27a and 27b of the tubular wall portion 11, respectively.

そして、所定のトルク以上で回動体をさらに所定の回動位置へと回動させると、第１ピン１７ａ，１７ｂが第２ピン３５ａ，３５ｂを周方向に押圧して弾性片２７ａ，２７ｂを弾性変形させ、この弾性変形によって第２ピン３５ａ，３５ｂが第１ピン１７ａ，１７ｂ上を摺動しつつ乗り越える。 Then, when the rotating body is further rotated to a predetermined rotation position with a predetermined torque or more, the first pins 17a and 17b press the second pins 35a and 35b in the circumferential direction to elastically elastic the elastic pieces 27a and 27b. The second pins 35a and 35b slide over the first pins 17a and 17b by sliding due to this elastic deformation.

こうして、第２ピン３５ａ，３５ｂが第１ピン１７ａ，１７ｂを乗り越えると、弾性片２７ａ，２７ｂが自身の弾性力によって元の状態に復帰して、回動体が所定の回動位置に保持されることになる。 In this way, when the second pins 35a, 35b get over the first pins 17a, 17b, the elastic pieces 27a, 27b return to their original state by their own elastic force, and the rotating body is held at a predetermined rotating position. It will be.

このとき、第１ピン１７ａ，１７ｂを乗り越えた第２ピン３５ａ，３５ｂは、それぞれ膨出部１９ｂにより第１ピン１７ａ，１７ｂの突出による段差が小さくなっているため、回転部材１５への衝突による異音を抑制することができる。 At this time, the second pins 35a and 35b that have passed over the first pins 17a and 17b have a small step due to the protrusion of the first pins 17a and 17b due to the bulging portion 19b, respectively, so that the second pin 35a and 35b may collide with the rotating member 15. It is possible to suppress abnormal noise.

特に、本実施例では、膨出部１９ｂが第１ピン１７ａ，１７ｂに対し周方向に近接するにつれて徐々に段差を小さくするスロープ状である。 In particular, in this embodiment, the bulging portion 19b has a slope shape in which the level difference is gradually reduced as the bulging portion 19b approaches the first pins 17a and 17b in the circumferential direction.

従って、第２ピン３５ａ，３５ｂが第１ピン１７ａ，１７ｂを乗り越えた直後は、第１ピン１７ａ，１７ｂの突出による段差が最も小さく、第２ピン３５ａ，３５ｂが膨出部１９ｂに当接して異音が抑制され、その後は、膨出部１９ｂに沿って第２ピン３５ａ，ｂ３５ｂが異音なく案内されつつ弾性片２７ａ，２７ｂの復帰を許容する。 Therefore, immediately after the second pins 35a and 35b have passed over the first pins 17a and 17b, the step due to the protrusion of the first pins 17a and 17b is the smallest, and the second pins 35a and 35b come into contact with the bulging portion 19b. The abnormal noise is suppressed, and thereafter, the second pins 35a, b35b are guided along the bulging portion 19b without abnormal noise, and the elastic pieces 27a, 27b are allowed to return.

このため、本実施例では、第２ピン３５ａ，３５ｂの回転部材１５への衝突による異音を確実に抑制される。 Therefore, in the present embodiment, the abnormal noise due to the collision of the second pins 35a and 35b with the rotating member 15 is reliably suppressed.

しかも、本実施例では、第２ピン３５ａ，３５ｂの膨出部３９ｂにより第２ピン３５ａ，３５ｂの突出による段差も小さくなっているので、第１ピン１７ａ，１７ｂが弾性片２７ａ，２７ｂに衝突することによる異音も抑制できると共に第２ピン３５ａ，３５ｂが回転部材１５に衝突することによる異音をより確実に抑制できる。 Moreover, in this embodiment, since the stepped portion due to the protrusion of the second pins 35a and 35b is also small due to the bulging portion 39b of the second pins 35a and 35b, the first pins 17a and 17b collide with the elastic pieces 27a and 27b. It is possible to suppress the abnormal noise caused by doing so, and it is possible to more reliably suppress the abnormal noise caused by the collision of the second pins 35a and 35b with the rotating member 15.

また、膨出部３９ｂも、膨出部１９ｂと同様、第２ピン３５ａ，３５ｂに対し周方向に近接するにつれて徐々に段差を小さくするスロープ状であるため、第１ピン１７ａ，１７ｂを膨出部３９ｂによって案内することで、第１ピン１７ａ，１７ｂの弾性片２７ａ，２７ｂへの衝突による異音を確実に抑制することができる。結果として、第２ピン３５ａ，３５ｂも案内されるので、第２ピン３５ａ，３５ｂの回転部材１５への衝突による異音をより確実に抑制できる。 Further, like the bulge portion 19b, the bulge portion 39b is also in the shape of a slope that gradually decreases in level as it approaches the second pins 35a and 35b in the circumferential direction, and thus the first pins 17a and 17b bulge. By guiding with the portion 39b, it is possible to reliably suppress abnormal noise due to the collision of the first pins 17a, 17b with the elastic pieces 27a, 27b. As a result, since the second pins 35a and 35b are also guided, abnormal noise due to the collision of the second pins 35a and 35b with the rotating member 15 can be suppressed more reliably.

また、本実施例では、第２ピン３５ａ，３５ｂが第１ピン１７ａ，１７ｂを乗り越える際、弾性片２７ａ，２７ｂの中央部３１及び両端部３３ａ，３３ｂの板厚が他の部分に対して増加されているので、弾性片２７ａ，２７ｂの変形のバランスが良くなる。 Further, in this embodiment, when the second pins 35a and 35b pass over the first pins 17a and 17b, the plate thickness of the central portion 31 and both end portions 33a and 33b of the elastic pieces 27a and 27b is increased with respect to the other portions. Therefore, the deformation of the elastic pieces 27a and 27b is well balanced.

また、弾性片２７ａ，２７ｂの応力が高くなる中央部３１及び両端部３３ａ，３３ｂの肉厚を増加することによって、弾性片２７ａ，２７ｂの応力の均等化を図ることができる。 Further, by increasing the wall thickness of the central portion 31 and the both end portions 33a, 33b where the stress of the elastic pieces 27a, 27b becomes high, the stress of the elastic pieces 27a, 27b can be equalized.

かかる弾性片２７ａ，２７ｂの変形時には、ケース３の筒状壁部１１も変形するが、筒状壁部１１は、弾性片２７ａ，２７ｂの変形方向に伸び、変形方向に交差方向に縮むことになる。この交差方向への縮みは、筒状壁部１１と蓋部４１との間の隙間Ｇ１，Ｇ２により許容されるので、弾性片２７ａ，２７ｂは、円滑且つ確実に弾性変形することができる。 When the elastic pieces 27a and 27b are deformed, the cylindrical wall portion 11 of the case 3 is also deformed, but the cylindrical wall portion 11 extends in the deformation direction of the elastic pieces 27a and 27b and contracts in the intersecting direction in the deformation direction. Become. Since the contraction in the intersecting direction is allowed by the gaps G1 and G2 between the tubular wall portion 11 and the lid portion 41, the elastic pieces 27a and 27b can be elastically deformed smoothly and reliably.

こうして所定の回動位置に回動体が保持された後は、手動により初期位置側に節度感をもって戻されると、回動体の自重によって初期位置側へと回動し、この回動が回転ダンパー５によって緩やかに行われることになる。 After the turning body is held at the predetermined turning position in this way, when it is manually returned to the initial position side with a moderation sensation, the turning body is turned to the initial position side by its own weight, and this turning is performed by the rotation damper 5. Will be done slowly.

回動体を所定の回動位置から初期位置側に戻す際は、所定の回動位置まで回動させた場合と逆側の膨出部１９ａ，３９ａによって異音の発生が抑制される。 When the rotating body is returned from the predetermined rotating position to the initial position side, the bulging portions 19a and 39a on the opposite side to the case where the rotating body is rotated to the predetermined rotating position suppress the generation of abnormal noise.

［実施例１の効果］
以上説明したように、本実施例のダンパーユニット１に用いられた保持機構７は、回動軸と連動して軸周りに回転する円柱状の回転部材１５と、回転部材１５の外面１５ｃに対向して配置された弾性片２７ａ，２７ｂと、回転部材１５の外面から突出する第１ピン１７ａ，１７ｂと、回転部材１５の外面１５ｃに対向する弾性片２７ａ，２７ｂの内面２７ｃから突出し回転部材１５の回転に応じて第１ピン１７ａ，１７ｂを弾性片２７ａ，２７ｂの弾性変形により乗り越える第２ピン３５ａ，３５ｂと、第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂに対し回転部材１５の周方向における両側に設けられ第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂの突出による段差を小さくする膨出部１９ａ，１９ｂ及び３９ａ，３９ｂとを備えている。 [Effect of Example 1]
As described above, the holding mechanism 7 used in the damper unit 1 of the present embodiment faces the cylindrical rotating member 15 that rotates around the axis in conjunction with the rotating shaft and the outer surface 15c of the rotating member 15. Elastic pieces 27a and 27b, which are arranged in parallel, the first pins 17a and 17b protruding from the outer surface of the rotating member 15, and the inner surface 27c of the elastic pieces 27a and 27b facing the outer surface 15c of the rotating member 15, protruding from the rotating member 15 2nd pins 35a, 35b that overcome the first pins 17a, 17b by elastic deformation of the elastic pieces 27a, 27b in accordance with the rotation of the first pin 17a, 17b and the second pins 35a, 35b. It is provided with bulging portions 19a, 19b and 39a, 39b which are provided on both sides in the direction and reduce a step due to the protrusion of the first pins 17a, 17b and the second pins 35a, 35b.

従って、本実施例では、構造を簡素化しつつ回動体を所定の回動位置に保持する保持機構７を実現することができる。 Therefore, in this embodiment, it is possible to realize the holding mechanism 7 that holds the rotating body at a predetermined rotating position while simplifying the structure.

しかも、本実施例では、第２ピン３５ａ，３５ｂが第１ピン１７ａ，１７ｂを乗り越えたときに、膨出部１９ａ，１９ｂ又は３９ａ，３９ｂにより第１ピン１７ａ，１７ｂ又は第２ピン３５ａ，３５ｂの突出による段差が小さくなっているため、第１ピン１７ａ，１７ｂ又は第２ピン３５ａ，３５ｂが膨出部１９ａ，１９ｂ又は３９ａ，３９ｂに当接することによって第２ピン３５ａ，３５ｂが回転部材１５への衝突による異音を抑制することができる。 Moreover, in the present embodiment, when the second pins 35a, 35b get over the first pins 17a, 17b, the bulges 19a, 19b or 39a, 39b cause the first pins 17a, 17b or the second pins 35a, 35b. Since the step difference due to the protrusion of the first pin 17a, 17b or the second pin 35a, 35b abuts on the bulging portions 19a, 19b or 39a, 39b, the second pin 35a, 35b is rotated. Noise due to collision with can be suppressed.

また、本実施例では、膨出部１９ａ，１９ｂ及び３９ａ，３９ｂが第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂに対し周方向に近接するにつれて徐々に段差を小さくするスロープ状であるため、異音を確実に抑制することができる。 Further, in this embodiment, since the bulging portions 19a, 19b and 39a, 39b have a slope shape in which the step is gradually reduced as they approach the first pins 17a, 17b and the second pins 35a, 35b in the circumferential direction. It is possible to reliably suppress abnormal noise.

また、本実施例の保持機構７は、回転部材１５を内部に収容し回転部材１５の外周に位置する筒状壁部１１を備え、弾性片２７ａ，２７ｂが筒状壁部１１に周方向に沿って設けられた一対のスリット２９ａ，２９ｂにより区画され筒状壁部１１に一体の板バネである。 Further, the holding mechanism 7 of the present embodiment is provided with the cylindrical wall portion 11 which houses the rotating member 15 inside and is located on the outer periphery of the rotating member 15, and the elastic pieces 27a and 27b are arranged on the cylindrical wall portion 11 in the circumferential direction. It is a leaf spring which is divided by a pair of slits 29 a and 29 b provided along the tubular wall portion 11 and is integral with the tubular wall portion 11.

従って、本実施例では、より確実に構造を簡素化することができる。 Therefore, in this embodiment, the structure can be more surely simplified.

第２ピン３５ａ，３５ｂは、板バネである弾性片２７ａ，２７ｂの周方向での中央部３１に設けられ、弾性片２７ａ，２７ｂの中央部３１及び両端部３３ａ，３３ｂは、他の部分に対して板厚が増加され、膨出部３９ａ，３９ｂは、弾性片２７ａ，２７ｂの中央部３１の板厚が増加された部分からなる。 The second pins 35a and 35b are provided in the central portion 31 of the elastic pieces 27a and 27b, which are leaf springs, in the circumferential direction, and the central portion 31 and both end portions 33a and 33b of the elastic pieces 27a and 27b are provided in other portions. On the other hand, the plate thickness is increased, and the bulging portions 39a and 39b are formed by the plate portions of the central portions 31 of the elastic pieces 27a and 27b where the plate thickness is increased.

従って、弾性片２７ａ，２７ｂは、中央部３１及び両端部３３ａ，３３ｂの板厚の増加によって、変形のバランスが良くなり、且つ応力の均等化を図ることができる。しかも、弾性片２７ａ，２７ｂの中央部３１及び両端部３３ａ，３３ｂの板厚の増加を利用して膨出部３９ａ，３９ｂを形成することができる。 Therefore, the elastic pieces 27a and 27b can improve the balance of deformation and equalize the stress by increasing the plate thicknesses of the central portion 31 and both end portions 33a and 33b. Moreover, the bulging portions 39a and 39b can be formed by utilizing the increase in the plate thickness of the central portion 31 of the elastic pieces 27a and 27b and the both end portions 33a and 33b.

本実施例の保持機構７は、筒状壁部１１が断面楕円形であるので、省スペース化を実現することができる。 In the holding mechanism 7 of the present embodiment, the tubular wall portion 11 has an elliptical cross section, so that space saving can be realized.

ケース３は、筒状壁部１１の開口部１１ａに取り付けられる蓋部４１を備え、筒状壁部１１と蓋部４１との間には、弾性片２７ａ，２７ｂの変位方向に対する交差方向に隙間Ｇ１，Ｇ２が設けられている。 The case 3 includes a lid portion 41 attached to the opening 11a of the tubular wall portion 11, and a gap is provided between the tubular wall portion 11 and the lid portion 41 in a direction intersecting the displacement direction of the elastic pieces 27a and 27b. G1 and G2 are provided.

従って、本実施例では、蓋部４１を設けても、隙間Ｇ１，Ｇ２によって弾性片２７ａ，２７ｂの変形を許容することができる。 Therefore, in the present embodiment, even if the lid portion 41 is provided, the deformation of the elastic pieces 27a and 27b can be allowed by the gaps G1 and G2.

第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂは、それぞれ回転部材１５及び弾性片２７ａ，２７ｂとは別体に形成されると共に回転部材１５及び弾性片２７ａ，２７ｂに支持された耐摩耗性のピンである。 The first pins 17a and 17b and the second pins 35a and 35b are formed separately from the rotating member 15 and the elastic pieces 27a and 27b, and are supported by the rotating member 15 and the elastic pieces 27a and 27b. It is a pin.

従って、本実施例では、回動体を繰り返し回動させても、第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂの摩耗を抑制して、所定の回動位置での回動体の保持を確実に行うことができる。 Therefore, in the present embodiment, even if the rotating body is repeatedly rotated, the wear of the first pins 17a and 17b and the second pins 35a and 35b is suppressed, and the rotating body is reliably held at the predetermined rotating position. Can be done.

回転部材１５及び弾性片２７ａ，２７ｂは、第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂを保持する保持凹部１５ｄ、３７を備え、保持凹部１５ｄ、３７の少なくとも一部は、膨出部１５ｄ、３７により区画される。 The rotating member 15 and the elastic pieces 27a and 27b include holding recesses 15d and 37 that hold the first pins 17a and 17b and the second pins 35a and 35b, and at least a part of the holding recesses 15d and 37 is the bulging portion 15d. , 37.

従って、本実施例では、第１ピン１７ａ，１７ｂ及び第２ピン３５ａ，３５ｂの一部を膨出部１９ａ，１９ｂ，３９ａ，３９ｂで受けることができ、応力の分散性を向上することができる。 Therefore, in the present embodiment, a part of the first pins 17a, 17b and the second pins 35a, 35b can be received by the bulges 19a, 19b, 39a, 39b, and the dispersibility of stress can be improved. ..

かかる保持機構７を有するダンパーユニット１は、例えば便座や便座カバー等の回動軸を中心に回動する回動体を所定の回動位置で保持し、且つ回動位置から回動前の初期位置に戻る際の回動体の回動を緩やかに行わせることができる。 The damper unit 1 having such a holding mechanism 7 holds, for example, a rotating body that rotates around a rotating shaft such as a toilet seat or a toilet seat cover at a predetermined rotating position, and at the initial position before rotating from the rotating position. The rotating body can be gently rotated when returning to.

図８は、本発明の実施例２に係る保持機構を適用したダンパーユニットの断面図であり、図５に対応した断面を示す。なお、実施例２の基本構造は、実施例１と同一であるため、対応する構成に同符号を付して重複した説明を省略する。 FIG. 8 is a cross-sectional view of a damper unit to which the holding mechanism according to the second embodiment of the present invention is applied, and shows a cross section corresponding to FIG. Since the basic structure of the second embodiment is the same as that of the first embodiment, the same reference numerals are given to the corresponding configurations and the duplicated description will be omitted.

本実施例のダンパーユニット１は、保持機構７の第１ピン１７ａ，１７ｂの周方向の両側にのみ膨出部１９ａ，１９ｂを設け、第２ピン３５ａ，３５ｂの周方向の両側の膨出部を省略したものである。その他は、実施例１と同様である。 In the damper unit 1 of this embodiment, the bulging portions 19a and 19b are provided only on both sides in the circumferential direction of the first pins 17a and 17b of the holding mechanism 7, and the bulging portions on both sides in the circumferential direction of the second pins 35a and 35b. Is omitted. Others are the same as in the first embodiment.

かかる構成の実施例２でも、実施例１と同様の作用効果を奏することができる。 The second embodiment having such a configuration can also achieve the same effects as the first embodiment.

図９は、本発明の実施例３に係る保持機構を適用したダンパーユニットの断面図であり、図５に対応した断面を示す。なお、実施例３の基本構造は、実施例１と同一であるため、対応する構成に同符号を付して重複した説明を省略する。 FIG. 9 is a cross-sectional view of a damper unit to which the holding mechanism according to the third embodiment of the present invention is applied, and shows a cross section corresponding to FIG. Since the basic structure of the third embodiment is the same as that of the first embodiment, the same reference numerals are given to the corresponding configurations and the duplicated description will be omitted.

本実施例のダンパーユニット１は、保持機構７の第２ピン３５ａ，３５ｂの周方向の両側にのみ膨出部３９ａ，３９ｂを設け、第１ピン１７ａ，１７ｂの周方向の両側の膨出部を省略したものである。その他は、実施例１と同様である。 In the damper unit 1 of this embodiment, the bulging portions 39a and 39b are provided only on both sides in the circumferential direction of the second pins 35a and 35b of the holding mechanism 7, and the bulging portions on both sides in the circumferential direction of the first pins 17a and 17b. Is omitted. Others are the same as in the first embodiment.

かかる構成の実施例３でも、実施例１と同様の作用効果を奏することができる。 Also in the third embodiment having such a configuration, the same operational effect as that of the first embodiment can be obtained.

図１０は、本発明の実施例４に係る保持機構を適用したダンパーユニットの要部断面図である。なお、実施例４の基本構造は、実施例１と同一であるため、対応する構成に同符号を付して重複した説明を省略する。 FIG. 10 is a cross-sectional view of essential parts of a damper unit to which the holding mechanism according to the fourth embodiment of the present invention is applied. Since the basic structure of the fourth embodiment is the same as that of the first embodiment, the corresponding components are designated by the same reference numerals and the duplicate description will be omitted.

本実施例のダンパーユニット１は、保持機構７の膨出部１９ａ，１９ｂの形状を多段の階段状にしたものである。階段状の段数は増減可能であり、増加させるほどスロープに近くなる。また、膨出部１９ａ，１９ｂは、一段とすることも可能である。なお、膨出部３９ａ，３９ｂを階段状にすることも可能である。その他は、実施例１と同様である。 In the damper unit 1 of this embodiment, the bulging portions 19a and 19b of the holding mechanism 7 are formed in a multi-stepped shape. The number of stairs can be increased or decreased, and the closer it is, the closer it becomes to the slope. Further, the bulged portions 19a and 19b can be formed in a single stage. The bulging portions 39a and 39b may be stepwise. Others are the same as in the first embodiment.

かかる構成の実施例４でも、実施例１と同様の作用効果を奏することができる。 The fourth embodiment having such a configuration can also achieve the same effects as the first embodiment.

７保持機構
１１筒状壁部
１１ａ開口部
１５回転部材
１５ｃ外面
１５ｄ，３７保持凹部
１７ａ，１７ｂ第１ピン（被乗越え部）
１９ａ，１９ｂ膨出部
２７ａ，２７ｂ弾性片
２７ｃ内面
２９ａ，２９ｂスリット
３１中央部
３３ａ，３３ｂ両端部
３５ａ，３５ｂ第２ピン（乗越え部）
３９ａ，３９ｂ膨出部
４１蓋部 7 Holding Mechanism 11 Cylindrical Wall 11a Opening 15 Rotating Member 15c Outer Surfaces 15d, 37 Holding Recesses 17a, 17b First Pin (Passed-over Part)
19a, 19b Swelling portions 27a, 27b Elastic piece 27c Inner surfaces 29a, 29b Slit 31 Central portions 33a, 33b Both end portions 35a, 35b Second pin (overpass portion)
39a, 39b Swelling portion 41 Lid portion

Claims

A rotating body holding mechanism for holding a rotating body that rotates about a rotating shaft at a predetermined rotating position,
A cylindrical rotation member that rotates around the axis in conjunction with the rotation axis,
An elastic piece arranged to face the outer surface of the rotating member,
A riding-over portion protruding from the outer surface of the rotating member,
A riding-over portion which projects from the inner surface of the elastic piece facing the outer surface of the rotating member and which rides over the riding-over portion by elastic deformation of the elastic piece in response to rotation of the rotating member;
A bulging portion that is provided on both sides in the circumferential direction of the rotating member with respect to at least one of the crossed-over portion and the crossed-over portion and that reduces a step due to the protrusion of at least one of the cross-overed portion and the cross-over portion,
A holding mechanism for a rotating body, comprising:

The holding mechanism for the rotating body according to claim 1,
The bulging portion has a slope shape that gradually decreases the step as it approaches the at least one of the overriding portion and the overpassing portion in the circumferential direction,
A rotating body holding mechanism characterized by the above.

The rotating body holding mechanism according to claim 1 or 2, wherein
A cylindrical wall portion that houses the rotating member and is located on the outer periphery of the rotating member,
The elastic piece is a leaf spring which is partitioned by a pair of slits provided in the tubular wall portion along the circumferential direction and is integral with the tubular wall portion.
A rotating body holding mechanism characterized by the above.

The holding mechanism for the rotating body according to claim 3,
The crossing-over portion is provided in a central portion of the elastic piece in the circumferential direction,
The central portion and both end portions of the elastic piece have a plate thickness increased with respect to other portions of the elastic piece,
The bulging portion is provided on at least both sides of the riding-over portion, and includes a portion where the plate thickness of the central portion of the elastic piece is increased.
A rotating body holding mechanism characterized by the above.

The rotating body holding mechanism according to claim 3 or 4, wherein
The tubular wall portion has a circular cross section or an elliptical cross section,
A rotating body holding mechanism characterized by the above.

The holding mechanism for the rotating body according to any one of claims 3 to 5,
The case includes a lid portion attached to the opening of the tubular wall portion,
Between the tubular wall portion and the lid portion, a gap is provided in a direction intersecting the displacement direction of the elastic piece,
A rotating body holding mechanism characterized by the above.

The holding mechanism for the rotating body according to any one of claims 1 to 6,
The riding-over portion and the riding-over portion are wear-resistant pins that are formed separately from the rotating member and the elastic piece and are supported by the rotating member and the elastic piece, respectively.
A rotating body holding mechanism characterized by the above.

The holding mechanism for the rotating body according to claim 7,
The rotating member and the elastic piece include a holding recess for holding the pin,
At least a part of the holding recess is partitioned by the bulging portion,
A rotating body holding mechanism characterized by the above.

A damper unit comprising the rotating body holding mechanism according to any one of claims 1 to 8 and a rotary damper,
The rotary damper includes a main body that generates a damping torque, and a damper shaft that is rotatably supported with respect to the main body.
The rotating member of the holding mechanism is supported by the damper shaft so as to be integrally rotatable.
This is a damper unit.