JP2020162694A - Opening/closing member drive device - Google Patents

Opening/closing member drive device Download PDF

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JP2020162694A
JP2020162694A JP2019064167A JP2019064167A JP2020162694A JP 2020162694 A JP2020162694 A JP 2020162694A JP 2019064167 A JP2019064167 A JP 2019064167A JP 2019064167 A JP2019064167 A JP 2019064167A JP 2020162694 A JP2020162694 A JP 2020162694A
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spring
case
output shaft
opening
motor
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JP7309410B2 (en
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昭夫 石水
Akio Iwami
昭夫 石水
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Nidec Sankyo Corp
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Nidec Sankyo Corp
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Priority to JP2019064167A priority Critical patent/JP7309410B2/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Toilet Supplies (AREA)

Abstract

To provide an opening/closing member drive device which can deal with various load patterns.SOLUTION: An opening/closing member drive device 1 comprises: an output shaft 2 which protrudes from a case 10; a motor 3 being the drive source; a transmission mechanism 4 which transmits the rotation of the motor 3 to the output shaft 2; and an assist spring 5 which biases the output shaft 2. The case 10 includes an intermediate case 16. The intermediate case 16 includes: an intermediate plate 161; and a support part 6 which protrudes from the intermediate plate 161 to the other side Z2 in a first direction Z. The assist spring 5 is supported by the intermediate plate 161. The output shaft 2 is rotatably supported by the tip of the support part 6 arranged in the inner periphery of the assist spring 5. The motor 3 includes a reception part 33 which supports the intermediate plate 161 and the support part 6 from one side Z1 in the first direction Z (opposite side to the output shaft 2 and the assist spring 5).SELECTED DRAWING: Figure 3

Description

本発明は、開閉部材が連結される出力軸と、出力軸を駆動する駆動源と、駆動源を収容するケースを備えた開閉部材駆動装置に関する。 The present invention relates to an opening / closing member driving device including an output shaft to which an opening / closing member is connected, a drive source for driving the output shaft, and a case for accommodating the drive source.

洋式トイレの便座や便蓋等の開閉部材を開閉する開閉装置として、モータ等の駆動源の回転を、減速輪列などの伝達機構を介して出力軸に伝達する開閉部材駆動装置が用いられる。特許文献１には、この種の開閉部材駆動装置（蓋体開閉装置）が開示される。特許文献１の蓋体開閉装置には、出力軸を付勢して開閉部材の開閉をアシストするアシストバネが組み込まれている。また、開閉部材が急に開閉された場合にモータや伝達機構に過大な負荷がかかって破損することを防止するため、トルクリミッタが組み込まれている。 As an opening / closing device for opening / closing an opening / closing member such as a toilet seat or a toilet lid of a Western-style toilet, an opening / closing member driving device that transmits the rotation of a drive source such as a motor to an output shaft via a transmission mechanism such as a reduction wheel train is used. Patent Document 1 discloses this type of opening / closing member driving device (lid opening / closing device). The lid opening / closing device of Patent Document 1 incorporates an assist spring that urges the output shaft to assist the opening / closing of the opening / closing member. Further, a torque limiter is incorporated in order to prevent the motor and the transmission mechanism from being damaged due to an excessive load when the opening / closing member is suddenly opened / closed.

特開２０１４−２００４５８号公報Japanese Unexamined Patent Publication No. 2014-400858

特許文献１の蓋体開閉装置は、ケース内にモータおよび減速輪列が収容される。出力軸は、減速輪列の最終歯車と噛み合う歯車部と、歯車部の中心から軸線方向に延びる軸部を備えており、軸部の先端がケースの外部へ突出している。出力軸は、ケースの底板部に固定された支軸に回転可能に支持される。また、アシストバネは、軸部の外周側に配置されている。アシストバネの一端は歯車部の端面に設けられた固定孔に配置され、他端はケースの内壁に設けられた係止部に係止される。 In the lid opening / closing device of Patent Document 1, a motor and a reduction wheel train are housed in a case. The output shaft includes a gear portion that meshes with the final gear of the reduction wheel train and a shaft portion that extends in the axial direction from the center of the gear portion, and the tip of the shaft portion projects to the outside of the case. The output shaft is rotatably supported by a support shaft fixed to the bottom plate of the case. Further, the assist spring is arranged on the outer peripheral side of the shaft portion. One end of the assist spring is arranged in a fixing hole provided on the end face of the gear portion, and the other end is locked by a locking portion provided on the inner wall of the case.

特許文献１のように、出力軸がケースに固定される支軸に支持される構造では、支軸を介してケースの１箇所に出力軸からの負荷が集中する。従って、ケースが樹脂製である場合に、ケースの変形や破損が発生するおそれがある。 In a structure in which the output shaft is supported by a support shaft fixed to the case as in Patent Document 1, the load from the output shaft is concentrated at one location on the case via the support shaft. Therefore, when the case is made of resin, the case may be deformed or damaged.

また、ケースには、アシストバネの端部からの負荷も加わっており、アシストバネの端部が支軸の近傍でケースに係止される場合には、ケースへの負荷が更に集中するので、ケースの変形や破損が発生するおそれがある。また、ケースが変形すれば、アシストバネのバネ力が低下するという問題もある。 In addition, a load from the end of the assist spring is also applied to the case, and when the end of the assist spring is locked to the case near the support shaft, the load on the case is further concentrated. The case may be deformed or damaged. Further, if the case is deformed, there is a problem that the spring force of the assist spring is reduced.

以上の問題点に鑑みて、本発明の課題は、出力軸からケースに加わる負荷によるケースの変形や破損を抑制することにある。 In view of the above problems, an object of the present invention is to suppress deformation and breakage of the case due to a load applied from the output shaft to the case.

上記課題を解決するために、本発明の開閉部材駆動装置は、ケースと、前記ケースから突出する出力軸と、前記ケースに収容されるモータと、前記ケースに収容され、前記モータの回転を前記出力軸に伝達する伝達機構と、を有し、前記ケースは、前記出力軸を回転可能に支持する支持部を備え、前記モータは、前記出力軸とは軸線方向で反対側から前記支持部を支持する受け部を備えることを特徴とする。 In order to solve the above problems, the opening / closing member driving device of the present invention includes a case, an output shaft protruding from the case, a motor housed in the case, and the rotation of the motor housed in the case. The case has a transmission mechanism that transmits to the output shaft, the case includes a support portion that rotatably supports the output shaft, and the motor supports the support portion from the side opposite to the output shaft in the axial direction. It is characterized by having a receiving portion that supports it.

本発明によれば、出力軸を回転させる駆動源であるモータが、出力軸を支持する支持部に対して軸線方向で反対側から支持部を支持する受け部を備えている。例えば、モータの側面を構成するモータケースを受け部として機能させる。このようにすると、モータケー
スなどの強固な部品によって支持部を背面側から支持できる。従って、出力軸に連結される開閉部材等から出力軸に加わる荷重等による支持部の変形や破損を抑制でき、支持部が設けられたケースの変形や破損を抑制できる。 According to the present invention, the motor, which is a drive source for rotating the output shaft, includes a receiving portion that supports the support portion from the opposite side in the axial direction with respect to the support portion that supports the output shaft. For example, the motor case that constitutes the side surface of the motor functions as a receiving portion. In this way, the support portion can be supported from the back side by a strong component such as a motor case. Therefore, the deformation and breakage of the support portion due to the load applied to the output shaft from the opening / closing member or the like connected to the output shaft can be suppressed, and the deformation or breakage of the case provided with the support portion can be suppressed.

本発明において、前記受け部は、前記モータに設けられた平坦面であることが好ましい。平坦面によって支持部を受けることにより、支持部を安定して支持できる。従って、支持部の変形や破損を抑制でき、支持部が設けられたケースの変形や破損を抑制できる。 In the present invention, the receiving portion is preferably a flat surface provided on the motor. By receiving the support portion by the flat surface, the support portion can be stably supported. Therefore, the deformation and breakage of the support portion can be suppressed, and the deformation and breakage of the case provided with the support portion can be suppressed.

本発明において、前記出力軸の第１回転方向への回転に伴い、前記出力軸を前記第１回転方向とは反対側の第２回転方向へ付勢するアシスト力を発生させるアシストばねを有し、前記アシストばねは、ねじりコイルばねであり、前記支持部は、前記アシストばねの内周側に配置され、前記アシストばねから突出する前記支持部の先端部に、前記出力軸が支持されることが好ましい。このように、出力軸だけでなくアシストばねを支持部によって保持する場合には、支持部に負荷が集中するが、本発明では、この場合でも、支持部の変形や破損を抑制でき、支持部が設けられたケースの変形や破損を抑制できる。また、支持部の変形を抑制することにより、アシストばねの変形も抑制できるので、ばね力の低下を抑制できる。従って、アシスト力の低下を抑制できる。 In the present invention, there is an assist spring that generates an assist force that urges the output shaft in the second rotation direction opposite to the first rotation direction as the output shaft rotates in the first rotation direction. The assist spring is a torsion coil spring, the support portion is arranged on the inner peripheral side of the assist spring, and the output shaft is supported by the tip end portion of the support portion protruding from the assist spring. Is preferable. In this way, when the assist spring is held by the support portion as well as the output shaft, the load is concentrated on the support portion. However, in the present invention, even in this case, deformation or breakage of the support portion can be suppressed, and the support portion can be suppressed. It is possible to suppress deformation and breakage of the case provided with. Further, by suppressing the deformation of the support portion, the deformation of the assist spring can also be suppressed, so that the decrease in the spring force can be suppressed. Therefore, it is possible to suppress a decrease in the assist force.

本発明において、前記ケースは、前記アシストばねの端部が配置されるばね係止穴が設けられたばね保持部を備え、前記モータは、前記ばね係止穴の開口方向と交差する方向から前記ばね保持部を受けるばね受け部を備えることが好ましい。このようにすると、モータケースなどの強固な部品によってばね保持部を背面側から支持できる。従って、ばね端からケースに加わる負荷によってケースが変形あるいは破損するおそれを少なくすることができる。 In the present invention, the case includes a spring holding portion provided with a spring locking hole in which an end portion of the assist spring is arranged, and the motor uses the spring from a direction intersecting the opening direction of the spring locking hole. It is preferable to provide a spring receiving portion for receiving the holding portion. In this way, the spring holding portion can be supported from the back side by a strong component such as a motor case. Therefore, it is possible to reduce the possibility that the case will be deformed or damaged due to the load applied to the case from the spring end.

本発明において、前記ケースは、内部空間を仕切る中間板を備え、前記支持部は、前記中間板から前記出力軸の側へ突出し、前記アシストばねは、前記中間板に支持され、前記受け部は、前記支持部および前記アシストばねとは反対側から前記中間板を支持することが好ましい。このように、アシストばねを背面側から支持する中間板を設けることにより、アシストばねを安定して支持できる。また、中間板をモータによって支持することにより、中間板の変形や破損を抑制でき、中間板が設けられたケースの変形や破損を抑制できる。また、中間板の変形を抑制することにより、アシストばねの変形も抑制できるので、ばね力の低下を抑制できる。従って、アシスト力の低下を抑制できる。 In the present invention, the case includes an intermediate plate that partitions the internal space, the support portion projects from the intermediate plate toward the output shaft side, the assist spring is supported by the intermediate plate, and the receiving portion is It is preferable to support the intermediate plate from the side opposite to the support portion and the assist spring. By providing the intermediate plate that supports the assist spring from the back surface side in this way, the assist spring can be stably supported. Further, by supporting the intermediate plate by the motor, the deformation and breakage of the intermediate plate can be suppressed, and the deformation and breakage of the case provided with the intermediate plate can be suppressed. Further, by suppressing the deformation of the intermediate plate, the deformation of the assist spring can also be suppressed, so that the decrease in the spring force can be suppressed. Therefore, it is possible to suppress a decrease in the assist force.

本発明によれば、出力軸を回転させる駆動源であるモータが、出力軸を支持する支持部に対して軸線方向で反対側から支持部を支持する受け部を備えている。例えば、モータの側面を構成するモータケースを受け部として機能させる。このようにすると、モータケースなどの強固な部品によって支持部を背面側から支持できる。従って、出力軸に連結される開閉部材等から出力軸に加わる荷重等による支持部の変形や破損を抑制でき、支持部が設けられたケースの変形や破損を抑制できる。 According to the present invention, the motor, which is a drive source for rotating the output shaft, includes a receiving portion that supports the support portion from the opposite side in the axial direction with respect to the support portion that supports the output shaft. For example, the motor case that constitutes the side surface of the motor functions as a receiving portion. In this way, the support portion can be supported from the back side by a strong component such as a motor case. Therefore, the deformation and breakage of the support portion due to the load applied to the output shaft from the opening / closing member or the like connected to the output shaft can be suppressed, and the deformation or breakage of the case provided with the support portion can be suppressed.

本発明を適用した開閉部材駆動装置の外観斜視図である。It is an external perspective view of the opening / closing member drive device to which this invention is applied. 図１の開閉部材駆動装置１を備えた洋式便器の説明図である。It is explanatory drawing of the Western-style toilet equipped with the opening / closing member driving device 1 of FIG. 図１の開閉部材駆動装置の断面図である。It is sectional drawing of the opening / closing member drive device of FIG. 図１の開閉部材駆動装置の分解斜視図である。It is an exploded perspective view of the opening / closing member driving device of FIG. モータ、駆動力伝達機構および出力軸を第１方向の他方側から見た斜視図である。It is a perspective view which looked at the motor, the driving force transmission mechanism and the output shaft from the other side of the 1st direction. 出力歯車および出力軸の分解斜視図である。It is an exploded perspective view of an output gear and an output shaft. 出力歯車、出力軸、およびアシストばねの分解斜視図である。It is an exploded perspective view of an output gear, an output shaft, and an assist spring. 第１ケースおよび中間ケースを第１方向の他方側から見た斜視図である。It is a perspective view which looked at the 1st case and the intermediate case from the other side of the 1st direction. 出力軸が基準位置にあるときのアシストばねの状態を示す説明図である。It is explanatory drawing which shows the state of the assist spring when the output shaft is in a reference position. 出力軸が第２ばねの作用開始位置にあるときのアシストばねの状態を示す説明図である。It is explanatory drawing which shows the state of the assist spring when the output shaft is in the action start position of the 2nd spring. 出力軸が第１ばねの作用開始位置にあるときのアシストばねの状態を示す説明図である。It is explanatory drawing which shows the state of the assist spring when the output shaft is in the action start position of the 1st spring.

以下、図面を参照して、本発明の実施の形態を説明する。図１は、本発明を適用した開閉部材駆動装置１の外観斜視図である。図２は、図１の開閉部材駆動装置１を備えた洋式便器１００の説明図である。図３は、図１の開閉部材駆動装置１の断面図である。図４は、図１の開閉部材駆動装置１の分解斜視図である。図５は、モータ３、伝達機構４および出力軸２を第１方向Ｚの他方側Ｚ２から見た斜視図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of an opening / closing member driving device 1 to which the present invention is applied. FIG. 2 is an explanatory view of a Western-style toilet bowl 100 provided with the opening / closing member driving device 1 of FIG. FIG. 3 is a cross-sectional view of the opening / closing member driving device 1 of FIG. FIG. 4 is an exploded perspective view of the opening / closing member driving device 1 of FIG. FIG. 5 is a perspective view of the motor 3, the transmission mechanism 4, and the output shaft 2 as viewed from the other side Z2 of the first direction Z.

本明細書において、互いに直交する３方向を、第１方向Ｚ、第２方向Ｙおよび第３方向Ｘとする。第１方向Ｚは、出力軸２の軸線Ｌの方向であり、第２方向Ｙはケース１０の長手方向であり、第３方向Ｘは、ケース１０の短手方向（幅方向）である。また、第１方向Ｚの一方側をＺ１、他方側をＺ２とし、第２方向Ｙの一方側をＹ１、他方側をＹ２とし、第３方向Ｘの一方側をＸ１、他方側をＸ２とする。ケース１０から出力軸２が突出する側は第１方向Ｚの他方側Ｚ２であり、ケース１０において出力軸２が配置される側は第２方向Ｙの一方側Ｙ１である。 In the present specification, the three directions orthogonal to each other are referred to as a first direction Z, a second direction Y, and a third direction X. The first direction Z is the direction of the axis L of the output shaft 2, the second direction Y is the longitudinal direction of the case 10, and the third direction X is the lateral direction (width direction) of the case 10. Further, one side of the first direction Z is Z1, the other side is Z2, one side of the second direction Y is Y1, the other side is Y2, one side of the third direction X is X1, and the other side is X2. .. The side where the output shaft 2 protrudes from the case 10 is the other side Z2 of the first direction Z, and the side where the output shaft 2 is arranged in the case 10 is the one side Y1 of the second direction Y.

（全体構成）
図１に示す開閉部材駆動装置１は、蓋や扉などの開閉部材を回動させて開閉する装置である。図２に示す洋式便器１００は、便器本体１１０、便座１２０、便蓋１３０、およびタンク１４０を有する。便座１２０および便蓋１３０は、それぞれ、開閉部材駆動装置１の出力軸２（図３参照）に連結される。便座１２０および便蓋１３０は、出力軸２の回転により、便器本体１１０に被さる閉姿勢、および、便器本体１１０から立ち上がる開姿勢に変位する。なお、洋式便器１００は、便座１２０および便蓋１３０の一方のみを開閉部材駆動装置１によって回動させる構成であってもよい。 (overall structure)
The opening / closing member driving device 1 shown in FIG. 1 is a device that opens / closes by rotating an opening / closing member such as a lid or a door. The Western-style toilet bowl 100 shown in FIG. 2 has a toilet bowl body 110, a toilet seat 120, a toilet lid 130, and a tank 140. The toilet seat 120 and the toilet lid 130 are respectively connected to the output shaft 2 (see FIG. 3) of the opening / closing member driving device 1. The toilet seat 120 and the toilet lid 130 are displaced by the rotation of the output shaft 2 into a closed posture that covers the toilet body 110 and an open posture that rises from the toilet body 110. The Western-style toilet bowl 100 may be configured such that only one of the toilet seat 120 and the toilet lid 130 is rotated by the opening / closing member driving device 1.

図３に示すように、開閉部材駆動装置１は、モータ３と、出力軸２と、モータ３の駆動力を出力軸２に伝達する伝達機構４と、出力軸２を付勢するアシストばね５と、モータ３および伝達機構４を収容するケース１０と、を有する。出力軸２は、ケース１０に収容される基部２１と、ケース１０の開口部９から突出する連結軸２２を備える。連結軸２２には、図２に示す便座１２０、便蓋１３０などの開閉部材が連結される。図１に示すように、ケース１０は、出力軸２の軸線方向である第１方向Ｚから見た場合に、第２方向Ｙに細長い形状を備える。出力軸２が配置されるケース１０の開口部９は、ケース１０の長手方向である第２方向Ｙの一方側の端部に位置している。 As shown in FIG. 3, the opening / closing member driving device 1 includes a motor 3, an output shaft 2, a transmission mechanism 4 that transmits the driving force of the motor 3 to the output shaft 2, and an assist spring 5 that urges the output shaft 2. And a case 10 for accommodating the motor 3 and the transmission mechanism 4. The output shaft 2 includes a base portion 21 housed in the case 10 and a connecting shaft 22 protruding from the opening 9 of the case 10. An opening / closing member such as the toilet seat 120 and the toilet lid 130 shown in FIG. 2 is connected to the connecting shaft 22. As shown in FIG. 1, the case 10 has an elongated shape in the second direction Y when viewed from the first direction Z, which is the axial direction of the output shaft 2. The opening 9 of the case 10 in which the output shaft 2 is arranged is located at one end of the second direction Y, which is the longitudinal direction of the case 10.

ケース１０は樹脂製である。図１に示すように、ケース１０は、第２方向Ｙに平行に延びる第１側壁１１および第２側壁１２を備える。また、ケース１０は、第１側壁１１および第２側壁１２の第２方向Ｙの他方側Ｙ２の端を接続する第３側壁１３、および、第１側壁１１および第２側壁１２の第２方向Ｙの一方側Ｙ１の端を接続する第４側壁１４を備える。第３側壁１３は、第３方向Ｘに直線状に延びている。第４側壁１４は、第２方向Ｙの一方側Ｙ１へ突出する凸形状である。本形態では、第４側壁１４は第１方向Ｚの他方側Ｚ２から見て半円状の湾曲面である。 The case 10 is made of resin. As shown in FIG. 1, the case 10 includes a first side wall 11 and a second side wall 12 extending parallel to the second direction Y. In addition, the case 10 has a third side wall 13 connecting the ends of the other side Y2 of the first side wall 11 and the second side wall 12 in the second direction Y, and a second side wall Y of the first side wall 11 and the second side wall 12. A fourth side wall 14 connecting the ends of Y1 on one side is provided. The third side wall 13 extends linearly in the third direction X. The fourth side wall 14 has a convex shape protruding toward one side Y1 of the second direction Y. In this embodiment, the fourth side wall 14 is a semicircular curved surface when viewed from the other side Z2 of the first direction Z.

図１、図３に示すように、ケース１０は、第１方向Ｚに沿って配列された第１ケース１
５、中間ケース１６、および第２ケース１７を備える。第１ケース１５は中間ケース１６の第１方向Ｚの一方側Ｚ１に位置し、第２ケース１７は中間ケース１６の第１方向Ｚの他方側Ｚ２に位置する。第１ケース１５に中間ケース１６が固定され、第２ケース１７が中間ケース１６に固定されることによって、ケース１０が組み立てられている。 As shown in FIGS. 1 and 3, the case 10 is a first case 1 arranged along the first direction Z.
5. An intermediate case 16 and a second case 17 are provided. The first case 15 is located on one side Z1 of the first direction Z of the intermediate case 16, and the second case 17 is located on the other side Z2 of the first direction Z of the intermediate case 16. The case 10 is assembled by fixing the intermediate case 16 to the first case 15 and fixing the second case 17 to the intermediate case 16.

第１ケース１５は、底板１５１と、底板１５１の外周縁から第１方向Ｚの他方側Ｚ２に延びる枠部１５２とを備える。枠部１５２は、ケース１０の第１側壁１１、第２側壁１２、第３側壁１３、および第４側壁１４の第１方向Ｚの一方側Ｚ１の端部分を構成する。第１ケース１５にはモータ３が固定されている。モータ３は、モータ本体３０と、モータ本体３０から突出する回転軸３１を備える。回転軸３１は、出力軸２の軸線Ｌと交差する方向を向いている。本例では、回転軸３１の回転中心線Ｌ１（図４参照）は、出力軸２の軸線Ｌと直交する。また、回転軸３１は、第１方向Ｚから見た場合に、第２方向Ｙ（ケース１０の長手方向）に対して傾斜している。回転軸３１の先端は、第１ケース１５に保持される軸受部材３２によって回転可能に支持されている。 The first case 15 includes a bottom plate 151 and a frame portion 152 extending from the outer peripheral edge of the bottom plate 151 to the other side Z2 in the first direction Z. The frame portion 152 constitutes an end portion of one side Z1 of the first side wall 11, the second side wall 12, the third side wall 13, and the fourth side wall 14 of the case 10. The motor 3 is fixed to the first case 15. The motor 3 includes a motor main body 30 and a rotating shaft 31 protruding from the motor main body 30. The rotation shaft 31 faces in a direction intersecting the axis L of the output shaft 2. In this example, the rotation center line L1 of the rotation axis 31 (see FIG. 4) is orthogonal to the axis line L of the output axis 2. Further, the rotation shaft 31 is inclined with respect to the second direction Y (longitudinal direction of the case 10) when viewed from the first direction Z. The tip of the rotating shaft 31 is rotatably supported by a bearing member 32 held in the first case 15.

中間ケース１６は、中間板１６１と、中間板１６１の外周縁から第１方向Ｚの他方側Ｚ２に延びる中間枠部１６２とを備える。中間枠部１６２は、ケース１０の第１側壁１１、第２側壁１２、第３側壁１３、および第４側壁１４の第１方向Ｚの中間部分を構成する。中間ケース１６には、伝達機構４を構成する複数の歯車のうちの一部の歯車が収容される。また、中間ケース１６には、出力軸２の基部２１が収容される。 The intermediate case 16 includes an intermediate plate 161 and an intermediate frame portion 162 extending from the outer peripheral edge of the intermediate plate 161 to the other side Z2 in the first direction Z. The intermediate frame portion 162 constitutes an intermediate portion of the first side wall 11, the second side wall 12, the third side wall 13, and the fourth side wall 14 in the first direction Z of the case 10. The intermediate case 16 accommodates a part of the gears constituting the transmission mechanism 4. Further, the intermediate case 16 accommodates the base 21 of the output shaft 2.

中間ケース１６における第２ケース１７の側の端部分には、板状の補強部材１８が固定される。補強部材１８は、ケース１０よりも剛性が高い。本例において、補強部材１８は、金属製である。補強部材１８には、補強部材側開口部１８１が設けられており、補強部材側開口部１８１からは、出力軸２が第１方向Ｚの他方側Ｚ２に突出する。また、補強部材１８には、ポテンショメータ８が取り付けられている。ポテンショメータ８は、第２方向Ｙにおいて、出力軸２とは反対側（第２方向Ｙの他方側Ｙ２）の端部分に配置される。 A plate-shaped reinforcing member 18 is fixed to the end portion of the intermediate case 16 on the side of the second case 17. The reinforcing member 18 has a higher rigidity than the case 10. In this example, the reinforcing member 18 is made of metal. The reinforcing member 18 is provided with a reinforcing member side opening 181, and the output shaft 2 projects from the reinforcing member side opening 181 to the other side Z2 in the first direction Z. Further, a potentiometer 8 is attached to the reinforcing member 18. The potentiometer 8 is arranged at the end portion of the second direction Y on the side opposite to the output shaft 2 (the other side Y2 of the second direction Y).

ポテンショメータ８は、伝達機構４を構成する複数の歯車のうちのいずれかの歯車に噛合するポテンショ歯車８１（図５参照）と、ポテンショ歯車８１の回転角度位置を検出する検出部８２（図３、図４参照）を備える。検出部８２は、回路基板を備える。ポテンショ歯車８１は、補強部材１８の第１方向Ｚの一方側Ｚ１に位置して、第３歯車の第３小径歯車に噛合する。検出部８２は、補強部材１８の他方側Ｚ２に位置し、回路基板が補強部材１８に固定されている。 The potentiometer 8 includes a potentiometer 81 (see FIG. 5) that meshes with one of a plurality of gears constituting the transmission mechanism 4, and a detection unit 82 (FIG. 3, FIG. 3) that detects the rotational angle position of the potentiometer 81. (See FIG. 4). The detection unit 82 includes a circuit board. The potentiometer 81 is located on one side Z1 of the first direction Z of the reinforcing member 18 and meshes with the third small diameter gear of the third gear. The detection unit 82 is located on the other side Z2 of the reinforcing member 18, and the circuit board is fixed to the reinforcing member 18.

第２ケース１７は、板状であり、第１方向Ｚの他方側Ｚ２から中間ケース１６に被せられている。第２ケース１７は、ケース１０の第１側壁１１、第２側壁１２、第３側壁１３、および第４側壁１４の第１方向Ｚの他方側Ｚ２の端部分に接続され、第１方向Ｚの他方側Ｚ２から補強部材１８を被う。第２ケース１７は、第１方向Ｚから見て補強部材側開口部１８１と重なる部位を貫通する開口部９を備える。図３に示すように、開口部９に配置される出力軸２と開口部９の内周面との隙間は、Ｏリング１９によって封止される。 The second case 17 has a plate shape and covers the intermediate case 16 from the other side Z2 of the first direction Z. The second case 17 is connected to the end portion of the first side wall 11, the second side wall 12, the third side wall 13, and the fourth side wall 14 of the case 10 on the other side Z2 of the first direction Z, and is connected to the end portion of the first side wall Z. The reinforcing member 18 is covered from the other side Z2. The second case 17 includes an opening 9 that penetrates a portion that overlaps with the reinforcing member side opening 181 when viewed from the first direction Z. As shown in FIG. 3, the gap between the output shaft 2 arranged in the opening 9 and the inner peripheral surface of the opening 9 is sealed by the O-ring 19.

図５に示すように、伝達機構４は、駆動力伝達経路の上流側から下流側に向かって、ウォーム４０、第１歯車４１、第２歯車４２、第３歯車４３、第４歯車４４、および出力歯車４５を備える。ウォーム４０は、モータ３の回転軸３１の外周側に固定されている。図４に示すように、ウォーム４０および第１歯車４１は、第１ケース１５内に配置される。図３に示すように、第２歯車４２、第３歯車４３、第４歯車４４、および出力歯車４５は中間ケース１６内に配置される。 As shown in FIG. 5, the transmission mechanism 4 has a worm 40, a first gear 41, a second gear 42, a third gear 43, a fourth gear 44, and a worm 40 from the upstream side to the downstream side of the driving force transmission path. The output gear 45 is provided. The worm 40 is fixed to the outer peripheral side of the rotating shaft 31 of the motor 3. As shown in FIG. 4, the worm 40 and the first gear 41 are arranged in the first case 15. As shown in FIG. 3, the second gear 42, the third gear 43, the fourth gear 44, and the output gear 45 are arranged in the intermediate case 16.

第１歯車４１は、ウォーム４０に噛合する第１大径歯車４１１と、第１大径歯車４１１
と同軸で第１大径歯車４１１よりも外径寸法が小さい第１小径歯車４１２を備える。第１大径歯車４１１は、第１小径歯車４１２の第１方向Ｚの一方側Ｚ１に位置する。第１歯車４１は、第１方向Ｚに延びる第１支軸４１３（図４参照）に回転可能に支持されている。第１支軸４１３は、一方の端部分が第１ケース１５の底板１５１に保持され、他方の端部分が中間ケース１６の中間板１６１に保持されている。第１歯車４１は、第１大径歯車４１１と第１小径歯車４１２との間に駆動力の伝達を継断するトルクリミッタ４６を備える。 The first gear 41 includes a first large-diameter gear 411 that meshes with the worm 40 and a first large-diameter gear 411.
A first small-diameter gear 412 that is coaxial with the first large-diameter gear and has an outer diameter smaller than that of the first large-diameter gear 411 is provided. The first large-diameter gear 411 is located on one side Z1 of the first small-diameter gear 412 in the first direction Z. The first gear 41 is rotatably supported by a first support shaft 413 (see FIG. 4) extending in the first direction Z. One end portion of the first support shaft 413 is held by the bottom plate 151 of the first case 15, and the other end portion is held by the intermediate plate 161 of the intermediate case 16. The first gear 41 includes a torque limiter 46 that connects and disconnects the transmission of the driving force between the first large-diameter gear 411 and the first small-diameter gear 412.

第２歯車４２は、第１小径歯車４１２に噛合する第２大径歯車４２１と、第２大径歯車４２１と同軸で第２大径歯車４２１よりも外径寸法が小さい第２小径歯車４２２を備える複合歯車である。第２大径歯車４２１は、第２小径歯車４２２の第１方向Ｚの一方側Ｚ１に位置する。第２大径歯車４２１は、中間ケース１６の中間板１６１に設けられた開口部１６３（図８参照）を介して第１小径歯車４１２に噛合する。第２歯車４２は、第１方向Ｚに延びる第２支軸４２３（図５参照）に回転可能に支持される。 The second gear 42 includes a second large-diameter gear 421 that meshes with the first small-diameter gear 412 and a second small-diameter gear 422 that is coaxial with the second large-diameter gear 421 and has an outer diameter smaller than that of the second large-diameter gear 421. It is a compound gear provided. The second large-diameter gear 421 is located on one side Z1 of the first direction Z of the second small-diameter gear 422. The second large-diameter gear 421 meshes with the first small-diameter gear 412 via an opening 163 (see FIG. 8) provided in the intermediate plate 161 of the intermediate case 16. The second gear 42 is rotatably supported by a second support shaft 423 (see FIG. 5) extending in the first direction Z.

第３歯車４３は、第２小径歯車４２２に噛合する第３大径歯車４３１と、第３大径歯車４３１と同軸で第３大径歯車４３１よりも外径寸法が小さい第３小径歯車４３２を備える複合歯車である。第３大径歯車４３１は、第３小径歯車４３２の第１方向Ｚの一方側Ｚ１に位置する。第３歯車４３は、第１方向Ｚに延びる第３支軸４３３に回転可能に支持される。第３支軸４３３は、一方の端部分が中間ケース１６の中間板１６１に保持され、他方の端部分は、補強部材１８を貫通して第２ケース１７に保持されている。 The third gear 43 includes a third large-diameter gear 431 that meshes with the second small-diameter gear 422 and a third small-diameter gear 432 that is coaxial with the third large-diameter gear 431 and has an outer diameter smaller than that of the third large-diameter gear 431. It is a compound gear provided. The third large-diameter gear 431 is located on one side Z1 of the first direction Z of the third small-diameter gear 432. The third gear 43 is rotatably supported by a third support shaft 433 extending in the first direction Z. One end portion of the third support shaft 433 is held by the intermediate plate 161 of the intermediate case 16, and the other end portion is held by the second case 17 through the reinforcing member 18.

第４歯車４４は、第３小径歯車４３２および出力歯車４５に噛合する平歯車である。第４歯車４４と出力歯車４５とは第２方向Ｙに配列されている。第４歯車４４は、第２歯車４２と同軸に配置されて、第２支軸４２３に回転可能に支持されている。第２支軸４２３は、一方の端部分が中間ケース１６に保持され、他方の端部分が補強部材１８に保持されている。すなわち、補強部材１８は、第２歯車４２および第４歯車４４を支持する第２支軸４２３を保持する軸保持部１８２（図３参照）を備える。 The fourth gear 44 is a spur gear that meshes with the third small diameter gear 432 and the output gear 45. The fourth gear 44 and the output gear 45 are arranged in the second direction Y. The fourth gear 44 is arranged coaxially with the second gear 42 and is rotatably supported by the second support shaft 423. One end portion of the second support shaft 423 is held by the intermediate case 16, and the other end portion is held by the reinforcing member 18. That is, the reinforcing member 18 includes a shaft holding portion 182 (see FIG. 3) that holds the second support shaft 423 that supports the second gear 42 and the fourth gear 44.

図６は、出力歯車４５および出力軸２の分解斜視図である。出力歯車４５は金属製である。出力歯車４５には、樹脂製の出力軸２が同軸に固定される。出力歯車４５は、第１方向Ｚに開口する中心穴４５１を備えた環状部材である。中心穴４５１の内周面には周方向に複数の凹部４５２が設けられ、出力軸２の基部２１の外周面には、出力歯車４５の内周面の凹部４５２に嵌る複数の凸部２３が設けられている。従って、出力歯車４５と出力軸２とは、軸線Ｌ周りに相対回転不能な状態で連結される。出力軸２の基部２１は樹脂部であり、熱カシメによって出力歯車４５に固定される。 FIG. 6 is an exploded perspective view of the output gear 45 and the output shaft 2. The output gear 45 is made of metal. A resin output shaft 2 is coaxially fixed to the output gear 45. The output gear 45 is an annular member provided with a center hole 451 that opens in the first direction Z. A plurality of recesses 452 are provided in the circumferential direction on the inner peripheral surface of the center hole 451, and a plurality of convex portions 23 fitted in the recesses 452 on the inner peripheral surface of the output gear 45 are provided on the outer peripheral surface of the base 21 of the output shaft 2. It is provided. Therefore, the output gear 45 and the output shaft 2 are connected around the axis L in a state in which they cannot rotate relative to each other. The base 21 of the output shaft 2 is a resin portion and is fixed to the output gear 45 by thermal caulking.

出力歯車４５は、補強部材１８によって、回転可能に支持されている。出力歯車４５は、第１方向Ｚの他方側Ｚ２の端部分に外周面に歯部を有さない円環状部４５０を備える。一方、補強部材１８は、補強部材側開口部１８１の外周縁部分に、出力歯車の円環状部４５０を外周側から回転可能に支持する出力歯車受部１８３を備える（図３参照）。出力歯車受部１８３は、補強部材１８における補強部材側開口部１８１の第１方向の他方側に屈曲して延びる環状筒部であり、例えば、バーリング加工により形成される。 The output gear 45 is rotatably supported by the reinforcing member 18. The output gear 45 includes an annular portion 450 having no tooth portion on the outer peripheral surface at the end portion of Z2 on the other side of the first direction Z. On the other hand, the reinforcing member 18 includes an output gear receiving portion 183 that rotatably supports the annular portion 450 of the output gear from the outer peripheral side at the outer peripheral edge portion of the reinforcing member side opening 181 (see FIG. 3). The output gear receiving portion 183 is an annular tubular portion that bends and extends to the other side of the reinforcing member side opening 181 in the reinforcing member 18 in the first direction, and is formed by, for example, burring.

図７は、出力歯車４５、出力軸２、およびアシストばね５の分解斜視図である。図３、図７に示すように、アシストばね５は、第１ばね５１および第２ばね５２を備える。第１ばね５１および第２ばね５２はねじりコイルばねである。図３に示すように、第２ばね５２は、第１ばね５１の内周側に配置される。第１ばね５１は、出力歯車４５の第１方向Ｚの一方側Ｚ１に位置する。また、第２ばね５２は、出力軸２の第１方向Ｚの一方側Ｚ１に位置し、第１ばね５１の内周側に位置する。 FIG. 7 is an exploded perspective view of the output gear 45, the output shaft 2, and the assist spring 5. As shown in FIGS. 3 and 7, the assist spring 5 includes a first spring 51 and a second spring 52. The first spring 51 and the second spring 52 are torsion coil springs. As shown in FIG. 3, the second spring 52 is arranged on the inner peripheral side of the first spring 51. The first spring 51 is located on one side Z1 of the output gear 45 in the first direction Z. Further, the second spring 52 is located on one side Z1 of the first direction Z of the output shaft 2 and is located on the inner peripheral side of the first spring 51.

図７に示すように、第１ばね５１は、断面矩形の線材５０Ａを螺旋状に巻いたばね部５１０と、ばね部５１０から第１方向Ｚの一方側Ｚ１へ延びる第１端部５１１と、ばね部５１０からから第１方向Ｚの他方側Ｚ２へ延びる第２端部５１２を備える。図５に示すように、第１ばね５１の第２端部５１２は、出力歯車４５の外周面を内周側へ切り欠いた切欠き部４５３に配置される。出力歯車４５は、切欠き部４５３を除く範囲の外周面に歯部が形成されている。切欠き部４５３は、周方向の一端に設けられた第１面４５４、および、周方向の他端に設けられた第２面４５５を備える。後述するように、出力軸２が所定の角度位置まで回転すると、第２面４５５に第２端部５１２が接触する。さらに出力軸２が回転すると、出力歯車４５を介して出力軸２が第１ばね５１によって付勢される。 As shown in FIG. 7, the first spring 51 includes a spring portion 510 in which a wire rod 50A having a rectangular cross section is spirally wound, a first end portion 511 extending from the spring portion 510 to one side Z1 of the first direction Z, and a spring. A second end portion 512 extending from the portion 510 to the other side Z2 in the first direction Z is provided. As shown in FIG. 5, the second end portion 512 of the first spring 51 is arranged in the notch portion 453 notched from the outer peripheral surface of the output gear 45 toward the inner peripheral side. The output gear 45 has teeth formed on the outer peripheral surface of the range excluding the notch 453. The notch 453 includes a first surface 454 provided at one end in the circumferential direction and a second surface 455 provided at the other end in the circumferential direction. As will be described later, when the output shaft 2 rotates to a predetermined angular position, the second end portion 512 comes into contact with the second surface 455. When the output shaft 2 further rotates, the output shaft 2 is urged by the first spring 51 via the output gear 45.

図８は、第１ケース１５よび中間ケース１６を第１方向Ｚの他方側Ｚ２から見た斜視図である。図３、図８に示すように、中間ケース１６は、中間板１６１から第１方向Ｚの他方側Ｚ２へ突出する支持部６を備える。図３に示すように、支持部６は、第１ばね５１および第２ばね５２の内周側に位置し、第１ばね５１および第２ばね５２よりも第１方向Ｚの他方側Ｚ２に突出する。すなわち、第１ばね５１および第２ばね５２は、支持部６によって保持されると共に、中間板１６１によって第１方向Ｚの一方側Ｚ１から支持される。 FIG. 8 is a perspective view of the first case 15 and the intermediate case 16 as viewed from the other side Z2 of the first direction Z. As shown in FIGS. 3 and 8, the intermediate case 16 includes a support portion 6 projecting from the intermediate plate 161 to the other side Z2 in the first direction Z. As shown in FIG. 3, the support portion 6 is located on the inner peripheral side of the first spring 51 and the second spring 52, and protrudes from the first spring 51 and the second spring 52 to the other side Z2 in the first direction Z. To do. That is, the first spring 51 and the second spring 52 are held by the support portion 6 and supported by the intermediate plate 161 from one side Z1 of the first direction Z.

本形態では、中間板１６１の第１方向Ｚの一方側Ｚ１にモータ３が配置される。中間板１６１は、ケース１０の内部空間をモータ３が配置される下部空間と、出力軸２およびアシストばね５等が配置される上部空間とに区画する。モータ３は、中間板１６１を第１方向Ｚの一方側Ｚ１から支持する受け部３３を備える。受け部３３は、モータ本体３０の第１方向Ｚの他方側Ｚ２の側面であり、例えば、金属製のモータケースによって構成される。本形態では、モータ本体３０は断面角型であるため、受け部３３は軸線Ｌに対して垂直な平坦面である。受け部３３は、中間板１６１を支持すると共に、出力軸２とは軸線Ｌ方向で反対側（すなわち、第１方向Ｚの一方側Ｚ１）から支持部６を支持している。 In this embodiment, the motor 3 is arranged on one side Z1 of the first direction Z of the intermediate plate 161. The intermediate plate 161 divides the internal space of the case 10 into a lower space in which the motor 3 is arranged and an upper space in which the output shaft 2 and the assist spring 5 and the like are arranged. The motor 3 includes a receiving portion 33 that supports the intermediate plate 161 from one side Z1 of the first direction Z. The receiving portion 33 is a side surface of the motor body 30 on the other side Z2 of the first direction Z, and is composed of, for example, a metal motor case. In this embodiment, since the motor body 30 has a square cross section, the receiving portion 33 is a flat surface perpendicular to the axis L. The receiving portion 33 supports the intermediate plate 161 and also supports the supporting portion 6 from the side opposite to the output shaft 2 in the axis L direction (that is, one side Z1 of the first direction Z).

出力軸２および出力歯車４５は、支持部６の先端部分によって回転可能に支持される。出力軸２は、基部２１の第１方向Ｚの一方側Ｚ１の端面に他方側Ｚ２に窪む円形凹部２４が設けられており、支持部６は、その先端部分が円形凹部２４に配置され、円形凹部２４の底面に接触している。ここで、支持部６の第１方向Ｚの他方側Ｚ２の先端は、出力歯車４５の円環状部４５０を回転可能に支持している補強部材１８の出力歯車受部１８３の内周側の位置まで延びている。 The output shaft 2 and the output gear 45 are rotatably supported by the tip portion of the support portion 6. The output shaft 2 is provided with a circular recess 24 recessed in the other side Z2 on the end surface of one side Z1 of the first direction Z of the base 21, and the tip portion of the support portion 6 is arranged in the circular recess 24. It is in contact with the bottom surface of the circular recess 24. Here, the tip of the other side Z2 of the support portion 6 in the first direction Z is a position on the inner peripheral side of the output gear receiving portion 183 of the reinforcing member 18 that rotatably supports the annular portion 450 of the output gear 45. Extends to.

図８に示すように、中間ケース１６には、中間板１６１を第１方向Ｚに貫通する開口部１６４が設けられている。開口部１６４は、中間ケース１６の中間枠部１６２において、第２方向Ｙに平行に延びる一対の枠部分のうち、第３方向Ｘの一方側Ｘ１に位置する枠部分１６５と支持部６との間に設けられている。開口部１６４は、支持部６の外周側に第１ばね５１および第２ばね５２を装着した場合に、第１ばね５１の第１端部５１１を配置可能な位置に設けられている。また、第１ケース１５には、第１方向Ｚから見て中間ケース１６の開口部１６４と重なる位置にばね保持部１５３が設けられている。ばね保持部１５３は、第１方向Ｚの一方側Ｚ１に窪むばね係止穴１５４を備える。第１ばね５１は、第１端部５１１が中間ケース１６の開口部１６４から第１方向Ｚの一方側Ｚ１に突出し、第１ケース１５のばね保持部１５３に設けられたばね係止穴１５４に挿入される。 As shown in FIG. 8, the intermediate case 16 is provided with an opening 164 that penetrates the intermediate plate 161 in the first direction Z. The opening 164 is an intermediate frame portion 162 of the intermediate case 16 that includes a frame portion 165 and a support portion 6 located on one side X1 of the third direction X among a pair of frame portions extending parallel to the second direction Y. It is provided in between. The opening 164 is provided at a position where the first end portion 511 of the first spring 51 can be arranged when the first spring 51 and the second spring 52 are mounted on the outer peripheral side of the support portion 6. Further, the first case 15 is provided with a spring holding portion 153 at a position overlapping the opening 164 of the intermediate case 16 when viewed from the first direction Z. The spring holding portion 153 includes a spring locking hole 154 that is recessed in one side Z1 of the first direction Z. The first spring 51 is inserted into a spring locking hole 154 provided in the spring holding portion 153 of the first case 15 with the first end portion 511 protruding from the opening 164 of the intermediate case 16 to one side Z1 of the first direction Z. Will be done.

第１ケース１５において、ばね保持部１５３は、ばね係止穴１５４が開口する方向である第１方向Ｚと交差する方向からモータ３によって支持される。すなわち、モータ３は、ばね係止穴１５４の開口方向（第１方向Ｚ）と交差する方向からばね保持部１５３を受けるばね受け部３４を備える。図８に示すように、ばね保持部１５３は、第１ケース１５の枠部１５２の内面からモータ本体３０が位置する側（第３方向Ｘの他方側Ｘ２）へ突出す
る。ばね保持部１５３は、第３方向Ｘの他方側Ｘ２の端部にモータ本体３０の側面と平行になるように切り欠かれた傾斜面１５５を備える。第１ケース１５にモータ３を収容すると、ばね保持部１５３の傾斜面１５５がモータ本体３０の側面によって第３方向Ｘの他方側Ｘ２から支持される。すなわち、ばね受け部３４は、モータ本体３０の側面であり、例えば、金属製のモータケースによって構成される。 In the first case 15, the spring holding portion 153 is supported by the motor 3 from a direction intersecting the first direction Z, which is the direction in which the spring locking hole 154 opens. That is, the motor 3 includes a spring receiving portion 34 that receives the spring holding portion 153 from a direction intersecting the opening direction (first direction Z) of the spring locking hole 154. As shown in FIG. 8, the spring holding portion 153 projects from the inner surface of the frame portion 152 of the first case 15 to the side where the motor body 30 is located (the other side X2 in the third direction X). The spring holding portion 153 includes an inclined surface 155 cut out at the end of the other side X2 in the third direction X so as to be parallel to the side surface of the motor main body 30. When the motor 3 is housed in the first case 15, the inclined surface 155 of the spring holding portion 153 is supported by the side surface of the motor body 30 from the other side X2 in the third direction X. That is, the spring receiving portion 34 is a side surface of the motor main body 30, and is composed of, for example, a metal motor case.

図７に示すように、第２ばね５２は、断面円形の線材５０Ｂを螺旋状に巻いたばね部５２０と、ばね部５２０の第１方向Ｚの一方側Ｚ１の端部から径方向内側へ屈曲して直線状に延びる第１端部５２１と、ばね部５２０から第１方向Ｚの他方側Ｚ２へ延びる第２端部５２２を備える。第２ばね５２の第１端部５２１は、支持部６に設けられた溝部６１（図８、図９（ｂ）、図１０（ｂ）参照）に配置される。これにより、第２ばね５２の第１端部５２１が中間ケース１６に係止される。また、図７に示すように、出力軸２は、基部２１の他方側Ｚ２の端面に設けられたばね係止穴２５を備える。第２ばね５２の第２端部５２２は、出力軸２のばね係止穴２５に配置される。 As shown in FIG. 7, the second spring 52 is bent inward in the radial direction from a spring portion 520 in which a wire rod 50B having a circular cross section is spirally wound and an end portion of one side Z1 of the first direction Z of the spring portion 520. It includes a first end portion 521 extending linearly and a second end portion 522 extending from the spring portion 520 to the other side Z2 in the first direction Z. The first end portion 521 of the second spring 52 is arranged in the groove portion 61 (see FIGS. 8, 9 (b) and 10 (b)) provided in the support portion 6. As a result, the first end portion 521 of the second spring 52 is locked to the intermediate case 16. Further, as shown in FIG. 7, the output shaft 2 includes a spring locking hole 25 provided on the end surface of the other side Z2 of the base portion 21. The second end portion 522 of the second spring 52 is arranged in the spring locking hole 25 of the output shaft 2.

図８に示すように、中間ケース１６は、支持部６の外周側において周方向に延びるリブ７を備える。リブ７は、中間板１６１から第１方向Ｚの他方側Ｚ２へ突出する。支持部６の外周側に第１ばね５１および第２ばね５２を装着したとき、リブ７の周方向の一端は、第１ばね５１と第２ばね５２との間に配置される（図３参照）。リブ７の内周縁７１は円弧状である。すなわち、リブ７の内周縁７１は、内周側に配置されるばねである第２ばね５２のばね部５２０の外周に沿う形状である。一方、リブ７の外周縁は、周方向の両端にそれぞれ、第１ばね５１のばね部５１０の内周に沿う円弧部７２Ａ、７２Ｂが設けられ、周方向の中央に、径方向外側へ突出する突出部７３が設けられている。突出部７３は、開口部１６４の内側へ突出する形状になっている。また、リブ７の外周縁は、突出部７３の先端の周方向の両側がそれぞれ、円弧部７２の接線方向に延びる直線部７４Ａ、７４Ｂが設けられている。 As shown in FIG. 8, the intermediate case 16 includes ribs 7 extending in the circumferential direction on the outer peripheral side of the support portion 6. The rib 7 projects from the intermediate plate 161 to the other side Z2 in the first direction Z. When the first spring 51 and the second spring 52 are mounted on the outer peripheral side of the support portion 6, one end of the rib 7 in the circumferential direction is arranged between the first spring 51 and the second spring 52 (see FIG. 3). ). The inner peripheral edge 71 of the rib 7 has an arc shape. That is, the inner peripheral edge 71 of the rib 7 has a shape along the outer peripheral edge of the spring portion 520 of the second spring 52, which is a spring arranged on the inner peripheral side. On the other hand, the outer peripheral edge of the rib 7 is provided with arc portions 72A and 72B along the inner circumference of the spring portion 510 of the first spring 51 at both ends in the circumferential direction, and projects radially outward at the center in the circumferential direction. A protruding portion 73 is provided. The protruding portion 73 has a shape that protrudes inward of the opening 164. Further, the outer peripheral edge of the rib 7 is provided with straight portions 74A and 74B extending in the tangential direction of the arc portion 72 on both sides in the circumferential direction of the tip of the protruding portion 73, respectively.

図７に示すように、第１ばね５１は、ばね部５１０の１巻目５１０Ａの巻き始め位置から１巻目５１０Ａの接線方向へ延びる直線状部分５１３を備えており、第１端部５１１は、直線状部分５１３の先端から第１方向Ｚの一方側Ｚ１へ屈曲して延びている。中間ケース１６に設けられたリブ７は、周方向の一方側の端部に設けられた円弧部７２Ａが、ばね部５１０の１巻目５１０Ａの巻き始め部分内周に沿って延びている。また、円弧部７２Ａから突出部７３の先端まで延びる直線部７４Ａは、直線状部分５１３に沿って延びている。第１ばね５１は、ばね部５１０の１巻目５１０Ａの巻き始め部分および直線状部分５１３がリブ７の外周縁に沿って延びる状態に配置される。これにより、リブ７の突出部７３によって第１ばね５１の回り止めがなされるとともに、第１ばね５１の直線状部分５１３が開口部１６４へ向かって延びる角度位置に位置決めされる。 As shown in FIG. 7, the first spring 51 includes a linear portion 513 extending in the tangential direction of the first winding 510A from the winding start position of the first winding 510A of the spring portion 510, and the first end portion 511 , It bends and extends from the tip of the linear portion 513 to one side Z1 of the first direction Z. In the rib 7 provided in the intermediate case 16, the arc portion 72A provided at one end in the circumferential direction extends along the inner circumference of the winding start portion of the first winding 510A of the spring portion 510. Further, the straight portion 74A extending from the arc portion 72A to the tip of the protruding portion 73 extends along the linear portion 513. The first spring 51 is arranged so that the winding start portion and the linear portion 513 of the first winding 510A of the spring portion 510 extend along the outer peripheral edge of the rib 7. As a result, the protrusion 73 of the rib 7 prevents the first spring 51 from rotating, and the linear portion 513 of the first spring 51 is positioned at an angular position extending toward the opening 164.

リブ７の第１方向Ｚの突出高さは、第１ばね５１を構成する線材５０Ａの線径よりも小さい。第１ばね５１は、ばね部５１０の１巻目５１０Ａの巻き終り部分が、リブの突出部７３の第１方向Ｚの一方側Ｚ１において周方向に延在する。従って、突出部７３は、第１ばね５１を第１方向Ｚの一方側Ｚ１から支持する受け部として機能している。 The protruding height of the rib 7 in the first direction Z is smaller than the wire diameter of the wire rod 50A constituting the first spring 51. In the first spring 51, the winding end portion of the first winding 510A of the spring portion 510 extends in the circumferential direction on one side Z1 of the first direction Z of the protruding portion 73 of the rib. Therefore, the protruding portion 73 functions as a receiving portion that supports the first spring 51 from one side Z1 of the first direction Z.

（動作）
閉部材駆動装置１は、モータ３が正方向あるいは逆方向に駆動されると、モータ３の駆動力が伝達機構４を介して出力軸２に伝達され、出力軸２が第１回転方向ＣＷあるいは第２回転方向ＣＣＷに回転する。これにより、出力軸２に固定された便座、便蓋などの開閉部材は、開方向あるいは閉方向に回転する。開閉部材が回転すると、ポテンショメータ８からは、開閉部材の位置に対応する信号が出力される。また、出力軸２に連結された開閉部材が第１回転方向ＣＷに回転すると、アシストばね５は、出力軸２を軸線Ｌ周りで第１
回転方向ＣＷとは反対の第２回転方向ＣＣＷに回転させる付勢力を出力軸２に加える。つまり、開閉部材を駆動する際に、出力軸２を付勢するアシスト力が出力軸２に加えられる。また、伝達機構４は、第１歯車４１にトルクリミッタ４６を備えているので、開閉部材から出力軸２を介して伝達機構４に過大な負荷が加わった場合には、トルクリミッタ４６が機能して、伝達機構４による駆動力伝達の伝達を遮断する。これにより、外部からの過大な負荷に起因して、伝達機構４が破損することを防止できる。 (motion)
In the closing member driving device 1, when the motor 3 is driven in the forward direction or the reverse direction, the driving force of the motor 3 is transmitted to the output shaft 2 via the transmission mechanism 4, and the output shaft 2 is transferred to the first rotation direction CW or It rotates in the second rotation direction CCW. As a result, the opening / closing members such as the toilet seat and the toilet lid fixed to the output shaft 2 rotate in the opening direction or the closing direction. When the opening / closing member rotates, the potentiometer 8 outputs a signal corresponding to the position of the opening / closing member. Further, when the opening / closing member connected to the output shaft 2 rotates in the first rotation direction CW, the assist spring 5 first rotates the output shaft 2 around the axis L.
An urging force for rotating in the second rotation direction CCW opposite to the rotation direction CW is applied to the output shaft 2. That is, when driving the opening / closing member, an assist force for urging the output shaft 2 is applied to the output shaft 2. Further, since the transmission mechanism 4 includes the torque limiter 46 on the first gear 41, the torque limiter 46 functions when an excessive load is applied to the transmission mechanism 4 from the opening / closing member via the output shaft 2. The transmission of the driving force transmission by the transmission mechanism 4 is cut off. As a result, it is possible to prevent the transmission mechanism 4 from being damaged due to an excessive load from the outside.

（アシストばねの作用角度範囲）
アシストばね５は、第１ばね５１と第２ばね５２の作用角度範囲（付勢力を発生させる角度範囲）が異なる。開閉部材が便座や便蓋である場合に、開閉部材を基準位置から所定角度回転させる際の回転負荷と基準位置からの回転角度との関係を示す負荷曲線は、単純な比例関係を示す形状ではない。そこで、作用角度範囲が異なる複数のばねを組み合わせることにより、モータ３の駆動力と第１ばね５１および第２ばね５２による付勢力とを合計した力と回転角度との関係を示すグラフを負荷曲線に近づけている。 (Working angle range of assist spring)
The assist spring 5 has different working angle ranges (angle ranges for generating urging force) between the first spring 51 and the second spring 52. When the opening / closing member is a toilet seat or a toilet lid, the load curve showing the relationship between the rotational load when rotating the opening / closing member from the reference position by a predetermined angle and the rotation angle from the reference position has a shape showing a simple proportional relationship. Absent. Therefore, by combining a plurality of springs having different working angle ranges, a graph showing the relationship between the total force of the driving force of the motor 3 and the urging force of the first spring 51 and the second spring 52 and the rotation angle is shown as a load curve. Is approaching.

図９は、出力軸２が基準位置Ｒ０にあるときのアシストばね５の状態を示す説明図である。図１０は、出力軸２が第２ばね５２の作用開始位置Ｒ２にあるときのアシストばね５の状態を示す説明図である。図９（ａ）、図１０（ａ）は出力軸２の回転位置を示し、図９（ｂ）、図１０（ｂ）はアシストばね５の状態を示す。図１１は、出力軸２が第１ばね５１の作用開始位置Ｒ１にあるときのアシストばね５の状態を示す説明図である。 FIG. 9 is an explanatory diagram showing a state of the assist spring 5 when the output shaft 2 is at the reference position R0. FIG. 10 is an explanatory diagram showing a state of the assist spring 5 when the output shaft 2 is at the action start position R2 of the second spring 52. 9 (a) and 10 (a) show the rotation position of the output shaft 2, and FIGS. 9 (b) and 10 (b) show the state of the assist spring 5. FIG. 11 is an explanatory diagram showing a state of the assist spring 5 when the output shaft 2 is at the action start position R1 of the first spring 51.

図９（ａ）に示すように、出力軸２が基準位置Ｒ０にあるとき、第１ばね５１は、第２端部５１２が出力歯車４５の切欠き部４５３の周方向の一方寄りに位置し、第２面４５５から離れている。従って、第１ばね５１から出力歯車４５へ付勢力は加わらない。また、図９（ｂ）に示すように、支持部６に設けられた溝部６１の周方向の中央に第２ばね５２の第１端部５２１が位置する。溝部６１は、支持部６の径方向の中心か径方向外側へ向かうに従って周方向の幅（溝幅）が大きくなっており、溝部６１の内面と接触しない範囲で第１端部５２１が周方向に動ける形状である。従って、第２ばね５１から出力軸２へ付勢力は加わらない。 As shown in FIG. 9A, when the output shaft 2 is at the reference position R0, the second end portion 512 of the first spring 51 is located on one side of the notch portion 453 of the output gear 45 in the circumferential direction. , Away from the second surface 455. Therefore, no urging force is applied from the first spring 51 to the output gear 45. Further, as shown in FIG. 9B, the first end portion 521 of the second spring 52 is located at the center in the circumferential direction of the groove portion 61 provided in the support portion 6. The width of the groove portion 61 in the circumferential direction (groove width) increases toward the center of the support portion 6 in the radial direction or the outer side in the radial direction, and the first end portion 521 is in the circumferential direction within a range that does not contact the inner surface of the groove portion 61. It is a shape that can be moved. Therefore, no urging force is applied from the second spring 51 to the output shaft 2.

図１０（ａ）に示すように、出力軸２が第２ばね５２の作用開始位置Ｒ２まで第１回転方向ＣＷに回転すると、第１ばね５１は、第２端部５１２が第２面４５５に近づくが、まだ第２面４５５から離れている。従って、第１ばね５１から出力歯車４５へ付勢力は加わらない。一方、図１０（ｂ）に示すように、第２ばね５２は、出力軸２の回転に伴って第１端部５２１が溝部６１内で第１回転方向ＣＷに傾き、溝部６１の内面と接触している。従って、ここからさらに出力軸２が第１回転方向ＣＷに回転した場合には、第２ばね５２が変形して付勢力を発生させることになる。 As shown in FIG. 10A, when the output shaft 2 rotates in the first rotation direction CW to the action start position R2 of the second spring 52, the second end portion 512 of the first spring 51 becomes the second surface 455. It approaches, but is still far from the second side 455. Therefore, no urging force is applied from the first spring 51 to the output gear 45. On the other hand, as shown in FIG. 10B, in the second spring 52, the first end portion 521 of the second spring 52 tilts in the groove portion 61 in the first rotation direction CW as the output shaft 2 rotates, and comes into contact with the inner surface of the groove portion 61. are doing. Therefore, when the output shaft 2 further rotates in the first rotation direction CW from here, the second spring 52 is deformed to generate an urging force.

次に、図１１に示すように、出力軸２がさらに第１回転方向ＣＷに回転して、第１ばね５１の作用開始位置Ｒ１に至ると、第１ばね５１は、第２端部５１２が第２面４５５に接触する。従って、ここからさらに出力軸２が第１回転方向ＣＷに回転した場合には、第１ばね５１が変形して付勢力を発生させることになる。以上より、アシストばね５は、基準位置Ｒ０から第２ばね５２の作用開始位置Ｒ２まではアシスト力を発生させず、作用開始位置Ｒ２から作用開始位置Ｒ１までは、第２ばね５２のみが付勢力を発生させるので、１つのばねのみでアシスト力を発生させる。そして、作用開始位置Ｒ１からは、第２ばね５２と第１ばね５１の両方が付勢力を発生させるので、その合計がアシスト力となる。 Next, as shown in FIG. 11, when the output shaft 2 further rotates in the first rotation direction CW and reaches the action start position R1 of the first spring 51, the first spring 51 has a second end portion 512. It contacts the second surface 455. Therefore, when the output shaft 2 further rotates in the first rotation direction CW from here, the first spring 51 is deformed to generate an urging force. From the above, the assist spring 5 does not generate an assist force from the reference position R0 to the action start position R2 of the second spring 52, and only the second spring 52 has an urging force from the action start position R2 to the action start position R1. Is generated, so that the assist force is generated by only one spring. Then, from the action start position R1, both the second spring 52 and the first spring 51 generate an urging force, so that the total becomes the assist force.

本形態において、基準位置Ｒ０における出力軸２の回転角度を０°とし、最大回転位置における出力軸２の回転角度をＲｍａｘ°とするとき、第１ばね５１の作用角度範囲（第１作用角度範囲）は、第１ばね５１の作用開始位置Ｒ１から最大回転位置までの範囲であ
る。また、第２ばね５２の作用角度範囲（第２作用角度範囲）は、第２ばね５２の作用開始位置Ｒ２から最大回転位置までの範囲である。例えば、Ｒｍａｘ°が１２０°であり、第１ばね５１の作用開始位置Ｒ１における回転角度が５０°である場合には、第１作用角度範囲は５０°〜１２０°である。また、第２ばね５２の作用開始位置Ｒ２における回転角度が２０°である場合には、第２作用角度範囲は、２０°〜１２０°である。従って、出力軸２が基準位置Ｒ０から２０°回転するまではアシスト力が発生せず、基準位置Ｒ０からの回転角度が２０°〜５０°の範囲では第２ばね５２の付勢力がアシスト力となり、基準位置Ｒ０からの回転角度が５０°〜１２０°の範囲では第２ばね５２の付勢力と第１ばね５１の付勢力の合計がアシスト力となる。 In the present embodiment, when the rotation angle of the output shaft 2 at the reference position R0 is 0 ° and the rotation angle of the output shaft 2 at the maximum rotation position is Rmax °, the working angle range of the first spring 51 (first working angle range). ) Is the range from the action start position R1 of the first spring 51 to the maximum rotation position. The action angle range of the second spring 52 (second action angle range) is a range from the action start position R2 of the second spring 52 to the maximum rotation position. For example, when Rmax ° is 120 ° and the rotation angle of the first spring 51 at the action start position R1 is 50 °, the first action angle range is 50 ° to 120 °. When the rotation angle of the second spring 52 at the action start position R2 is 20 °, the second action angle range is 20 ° to 120 °. Therefore, no assist force is generated until the output shaft 2 rotates 20 ° from the reference position R0, and the urging force of the second spring 52 becomes the assist force when the rotation angle from the reference position R0 is in the range of 20 ° to 50 °. When the rotation angle from the reference position R0 is in the range of 50 ° to 120 °, the sum of the urging force of the second spring 52 and the urging force of the first spring 51 is the assist force.

アシストばね５は、第１ばね５１のばね定数が第２ばね５２のばね定数より大きい。第１ばね５１は断面角型の線材５０Ａからなり、第２ばね５２は断面円形の線材５０Ｂからなり、線材５０Ａ、線材５０Ｂの線径は同一である。線径が同一である場合には、断面円形の線材によって形成されるコイルばねより、断面角型の線材によって形成されるコイルばねの方が、ばね定数は大きい。 In the assist spring 5, the spring constant of the first spring 51 is larger than the spring constant of the second spring 52. The first spring 51 is made of a wire rod 50A having a square cross section, the second spring 52 is made of a wire rod 50B having a circular cross section, and the wire diameters of the wire rod 50A and the wire rod 50B are the same. When the wire diameters are the same, the spring constant of the coil spring formed of the wire having a square cross section is larger than that of the coil spring formed of the wire having a circular cross section.

また、アシストばね５は、ばね定数が大きい第１ばね５１の作用角度範囲（第１作用角度範囲）が、ばね定数が小さい第２ばね５２の作用角度範囲（第２作用角度範囲）より小さい。上記のように、第１ばね５１の作用開始位置Ｒ１が５０°、第２ばね５２の作用開始位置Ｒ２が２０°である場合には、閉位置から開位置まで開閉部材を回転させる際に、ばね定数が小さい第２ばね５２の方が先に付勢力を発生させ始める。 Further, in the assist spring 5, the working angle range (first working angle range) of the first spring 51 having a large spring constant is smaller than the working angle range (second working angle range) of the second spring 52 having a small spring constant. As described above, when the action start position R1 of the first spring 51 is 50 ° and the action start position R2 of the second spring 52 is 20 °, when the opening / closing member is rotated from the closed position to the open position, the opening / closing member is rotated. The second spring 52, which has a smaller spring constant, starts to generate the urging force first.

（本形態の主な効果）
以上説明したように、本形態の開閉部材駆動装置１は、ケース１０と、ケース１０から突出する出力軸２と、ケース１０に収容されるモータ３と、ケース１０に収容され、モータ３の回転を出力軸２に伝達する伝達機構４と、を有し、ケース１０は、中間ケース１６を備え、中間ケース１６は、出力軸２を回転可能に支持する支持部６を備え、モータ３は、出力軸２とは軸線Ｌ方向で反対側から支持部６を支持する受け部３３を備えている。 (Main effect of this form)
As described above, the opening / closing member driving device 1 of the present embodiment includes the case 10, the output shaft 2 protruding from the case 10, the motor 3 housed in the case 10, and the rotation of the motor 3 housed in the case 10. The case 10 is provided with an intermediate case 16, the intermediate case 16 is provided with a support portion 6 for rotatably supporting the output shaft 2, and the motor 3 is provided with a transmission mechanism 4 for transmitting the output shaft 2. A receiving portion 33 that supports the support portion 6 from the opposite side in the axis L direction from the output shaft 2 is provided.

本形態では、出力軸２を回転させる駆動源であるモータ３が、出力軸２を支持する支持部６に対して軸線Ｌ方向で反対側から支持部６を支持する受け部３３を備えている。例えば、モータ３の側面を構成するモータケースを受け部３３として機能させる。このようにすると、金属製のモータケースなどの強固な部品によって支持部６を背面側から支持できる。従って、出力軸２に連結される開閉部材等から出力軸２に加わる荷重等による支持部６の変形や破損を抑制でき、支持部６が設けられた中間ケース１６の変形や破損を抑制できる。 In this embodiment, the motor 3, which is a drive source for rotating the output shaft 2, includes a receiving portion 33 that supports the support portion 6 from the opposite side in the axis L direction with respect to the support portion 6 that supports the output shaft 2. .. For example, the motor case forming the side surface of the motor 3 is made to function as a receiving portion 33. In this way, the support portion 6 can be supported from the back side by a strong component such as a metal motor case. Therefore, the deformation and breakage of the support portion 6 due to the load applied to the output shaft 2 from the opening / closing member or the like connected to the output shaft 2 can be suppressed, and the deformation or breakage of the intermediate case 16 provided with the support portion 6 can be suppressed.

本形態では、受け部３３は、モータ３に設けられた平坦面であり、平坦面によって支持部６を受けることにより、支持部６を安定して支持できる。従って、支持部６の変形や破損を抑制でき、支持部６が設けられた中間ケース１６の変形や破損を抑制できる。 In the present embodiment, the receiving portion 33 is a flat surface provided on the motor 3, and by receiving the supporting portion 6 by the flat surface, the supporting portion 6 can be stably supported. Therefore, the deformation and breakage of the support portion 6 can be suppressed, and the deformation and breakage of the intermediate case 16 provided with the support portion 6 can be suppressed.

本形態では、出力軸２の第１回転方向ＣＷへの回転に伴い、出力軸２を第１回転方向ＣＷとは反対側の第２回転方向ＣＣＷへ付勢するアシスト力を発生させるアシストばね５を有する。アシストばね５は、ねじりコイルばねである。また、支持部６は、アシストばね５の内周側に配置され、アシストばね５から突出する支持部６の先端部に、出力軸２が支持されている。このように、出力軸２だけでなくアシストばね５を支持部６によって保持しており、支持部６に負荷が集中する場合でも、モータ３が受け部３３を備えていれば、支持部６の変形や破損を抑制できる。従って、支持部６が設けられた中間ケース１６の変形や破損を抑制できる。また、支持部６の変形を抑制することにより、アシストばね５の変形も抑制できるので、ばね力の低下を抑制できる。従って、アシスト力の低下を抑制で
きる。 In this embodiment, the assist spring 5 generates an assist force that urges the output shaft 2 to the second rotation direction CCW opposite to the first rotation direction CW as the output shaft 2 rotates in the first rotation direction CW. Has. The assist spring 5 is a torsion coil spring. Further, the support portion 6 is arranged on the inner peripheral side of the assist spring 5, and the output shaft 2 is supported by the tip end portion of the support portion 6 protruding from the assist spring 5. In this way, not only the output shaft 2 but also the assist spring 5 is held by the support portion 6, and even when the load is concentrated on the support portion 6, if the motor 3 includes the receiving portion 33, the support portion 6 Deformation and breakage can be suppressed. Therefore, the deformation and breakage of the intermediate case 16 provided with the support portion 6 can be suppressed. Further, by suppressing the deformation of the support portion 6, the deformation of the assist spring 5 can also be suppressed, so that the decrease in the spring force can be suppressed. Therefore, it is possible to suppress a decrease in the assist force.

本形態では、ケース１０は、アシストばね５の端部が配置されるばね係止穴１５４が設けられたばね保持部１５３を備え、モータ３は、ばね係止穴１５４の開口方向である第１方向Ｚと交差する方向からばね保持部１５３を受けるばね受け部３４を備えている。従って、ばね端からばね保持部１５３が設けられた第１ケース１５に加わる負荷によって第１ケース１５が変形あるいは破損するおそれを少なくすることができる。ばね保持部１５３を支持するばね受け部３４は、金属製のモータケースによって構成されている。従って、剛性の高い部品によってばね保持部１５３を支持できる。なお、第１ばね５１でなく第２ばね５２の端部を同様の構造で保持することもできる。 In the present embodiment, the case 10 includes a spring holding portion 153 provided with a spring locking hole 154 in which the end portion of the assist spring 5 is arranged, and the motor 3 is in the first direction which is the opening direction of the spring locking hole 154. A spring receiving portion 34 that receives the spring holding portion 153 from the direction intersecting with Z is provided. Therefore, it is possible to reduce the possibility that the first case 15 is deformed or damaged by the load applied from the spring end to the first case 15 provided with the spring holding portion 153. The spring receiving portion 34 that supports the spring holding portion 153 is composed of a metal motor case. Therefore, the spring holding portion 153 can be supported by a highly rigid component. It is also possible to hold the end portion of the second spring 52 instead of the first spring 51 with the same structure.

本形態では、中間ケース１６は、ケース１０の内部空間を仕切る中間板１６１を備え、支持部６は、中間板１６１から出力軸２の側へ突出している。アシストばね５は、中間板１６１に支持され、受け部３３は、支持部６およびアシストばね５とは反対側から中間板１６１を支持している。このように、アシストばね５を背面側から支持する中間板１６１を設けることにより、アシストばね５を安定して支持できる。また、中間板１６１をモータ３によって支持することにより、中間板１６１の変形や破損を抑制でき、中間板１６１が設けられたケース１０の変形や破損を抑制できる。また、中間板１６１の変形を抑制することにより、アシストばね５の変形も抑制できるので、ばね力の低下を抑制できる。従って、アシスト力の低下を抑制できる。 In the present embodiment, the intermediate case 16 includes an intermediate plate 161 that partitions the internal space of the case 10, and the support portion 6 projects from the intermediate plate 161 toward the output shaft 2. The assist spring 5 is supported by the intermediate plate 161 and the receiving portion 33 supports the intermediate plate 161 from the side opposite to the support portion 6 and the assist spring 5. By providing the intermediate plate 161 that supports the assist spring 5 from the back surface side in this way, the assist spring 5 can be stably supported. Further, by supporting the intermediate plate 161 by the motor 3, the deformation or damage of the intermediate plate 161 can be suppressed, and the deformation or damage of the case 10 provided with the intermediate plate 161 can be suppressed. Further, by suppressing the deformation of the intermediate plate 161, the deformation of the assist spring 5 can also be suppressed, so that the decrease in the spring force can be suppressed. Therefore, it is possible to suppress a decrease in the assist force.

１…開閉部材駆動装置、２…出力軸、３…モータ、４…伝達機構、５…アシストばね、６…支持部、７…リブ、８…ポテンショメータ、９…開口部、１０…ケース、１１…第１側壁、１２…第２側壁、１３…第３側壁、１４…第４側壁、１５…第１ケース、１６…中間ケース、１７…第２ケース、１８…補強部材、１９…Ｏリング、２１…基部、２２…連結軸、２３…凸部、２４…円形凹部、２５…ばね係止穴、３０…モータ本体、３１…回転軸、３２…軸受部材、３３…受け部、３４…ばね受け部、４０…ウォーム、４１…第１歯車、４２…第２歯車、４３…第３歯車、４４…第４歯車、４５…出力歯車、４６…トルクリミッタ、５０Ａ…線材、５０Ｂ…線材、６１…溝部、７１…内周縁、７２Ａ、７２Ｂ…円弧部、７３…突出部、７４Ａ、７４Ｂ…直線部、８１…ポテンショ歯車、８２…検出部、１００…洋式便器、１１０…便器本体、１２０…便座、１３０…便蓋、１４０…タンク、１５１…底板、１５２…枠部、１５３…ばね保持部、１５４…ばね係止穴、１５５…傾斜面、１６１…中間板、１６２…中間枠部、１６３…開口部、１６４…開口部、１６５…枠部分、１８１…補強部材側開口部、１８２…軸保持部、１８３…出力歯車受部、４１１…第１大径歯車、４１２…第１小径歯車、４１３…第１支軸、４２１…第２大径歯車、４２２…第２小径歯車、４２３…第２支軸、４３１…第３大径歯車、４３２…第３小径歯車、４３３…第３支軸、４５０…円環状部、４５１…中心穴、４５２…凹部、４５３…切欠き部、４５４…第１面、４５５…第２面、５１０Ａ…１巻目、５１０…ばね部、５１１…第１端部、５１２…第２端部、５１３…直線状部分、５２０…ばね部、５２１…第１端部、５２２…第２端部、ＣＣＷ…第２回転方向、ＣＷ…第１回転方向、Ｌ…出力軸の軸線、Ｌ１…モータの回転中心線、Ｒ１…第１作用開始位置、Ｒ２…第２作用開始位置、Ｘ…第３方向、Ｙ…第２方向、Ｚ…第１方向
1 ... Opening / closing member drive device, 2 ... Output shaft, 3 ... Motor, 4 ... Transmission mechanism, 5 ... Assist spring, 6 ... Support part, 7 ... Rib, 8 ... Potential meter, 9 ... Opening, 10 ... Case, 11 ... 1st side wall, 12 ... 2nd side wall, 13 ... 3rd side wall, 14 ... 4th side wall, 15 ... 1st case, 16 ... intermediate case, 17 ... 2nd case, 18 ... reinforcing member, 19 ... O ring, 21 ... base, 22 ... connecting shaft, 23 ... convex, 24 ... circular recess, 25 ... spring locking hole, 30 ... motor body, 31 ... rotating shaft, 32 ... bearing member, 33 ... receiving part, 34 ... spring receiving part , 40 ... worm, 41 ... 1st gear, 42 ... 2nd gear, 43 ... 3rd gear, 44 ... 4th gear, 45 ... output gear, 46 ... torque limiter, 50A ... wire rod, 50B ... wire rod, 61 ... groove , 71 ... Inner peripheral edge, 72A, 72B ... Arc part, 73 ... Protruding part, 74A, 74B ... Straight part, 81 ... Potential gear, 82 ... Detection part, 100 ... Western style toilet, 110 ... Toilet body, 120 ... Toilet seat, 130 ... Toilet lid, 140 ... Tank, 151 ... Bottom plate, 152 ... Frame part, 153 ... Spring holding part, 154 ... Spring locking hole, 155 ... Inclined surface, 161 ... Intermediate plate, 162 ... Intermediate frame part, 163 ... Opening 164 ... Opening, 165 ... Frame part, 181 ... Reinforcing member side opening, 182 ... Shaft holding part, 183 ... Output gear receiving part, 411 ... First large diameter gear, 412 ... First small diameter gear, 413 ... 1 support shaft, 421 ... 2nd large diameter gear, 422 ... 2nd small diameter gear, 423 ... 2nd support shaft, 431 ... 3rd large diameter gear, 432 ... 3rd small diameter gear, 433 ... 3rd support shaft, 450 ... Circular portion, 451 ... Center hole, 452 ... Recess, 453 ... Notch, 454 ... First surface, 455 ... Second surface, 510A ... 1st roll, 510 ... Spring part, 511 ... 1st end, 512 ... 2nd end, 513 ... Linear part, 520 ... Spring part, 521 ... 1st end, 522 ... 2nd end, CCW ... 2nd rotation direction, CW ... 1st rotation direction, L ... Output shaft Axis line, L1 ... Motor rotation center line, R1 ... 1st action start position, R2 ... 2nd action start position, X ... 3rd direction, Y ... 2nd direction, Z ... 1st direction

Claims (5)

ケースと、
前記ケースから突出する出力軸と、
前記ケースに収容されるモータと、
前記ケースに収容され、前記モータの回転を前記出力時に伝達する伝達機構と、を有し、
前記ケースは、前記出力軸を回転可能に支持する支持部を備え、
前記モータは、前記出力軸とは軸線方向で反対側から前記支持部を支持する受け部を備えることを特徴とする開閉部材駆動装置。 With the case
The output shaft protruding from the case and
The motor housed in the case and
It has a transmission mechanism housed in the case and transmitting the rotation of the motor at the time of output.
The case includes a support that rotatably supports the output shaft.
The motor is an opening / closing member driving device including a receiving portion that supports the support portion from a side opposite to the output shaft in the axial direction. 前記受け部は、前記モータに設けられた平坦面であることを特徴とする請求項１に記載の開閉部材駆動装置。 The opening / closing member driving device according to claim 1, wherein the receiving portion is a flat surface provided on the motor. 前記出力軸の第１回転方向への回転に伴い、前記出力軸を前記第１回転方向とは反対側の第２回転方向へ付勢するアシスト力を発生させるアシストばねを有し、
前記アシストばねは、ねじりコイルばねであり、
前記支持部は、前記アシストばねの内周側に配置され、
前記アシストばねから突出する前記支持部の先端部に、前記出力軸が支持されることを特徴とする請求項１または２に記載の開閉部材駆動装置。 It has an assist spring that generates an assist force that urges the output shaft in the second rotation direction opposite to the first rotation direction as the output shaft rotates in the first rotation direction.
The assist spring is a torsion coil spring.
The support portion is arranged on the inner peripheral side of the assist spring.
The opening / closing member driving device according to claim 1 or 2, wherein the output shaft is supported by a tip end portion of the supporting portion protruding from the assist spring. 前記ケースは、前記アシストばねの端部が配置されるばね係止穴が設けられたばね保持部を備え、
前記モータは、前記ばね係止穴の開口方向と交差する方向から前記ばね保持部を受けるばね受け部を備えることを特徴とする請求項３に記載の開閉部材駆動装置。 The case comprises a spring holding portion provided with a spring locking hole in which the end of the assist spring is arranged.
The opening / closing member driving device according to claim 3, wherein the motor includes a spring receiving portion that receives the spring holding portion from a direction intersecting the opening direction of the spring locking hole. 前記ケースは、内部空間を仕切る中間板を備え、
前記支持部は、前記中間板から前記出力軸の側へ突出し、
前記受け部は、前記支持部とは反対側から前記中間板に当接して、前記中間板を介して前記支持部を支持することを特徴とする請求項１から４の何れか一項に記載の開閉部材駆動装置。 The case is provided with an intermediate plate that partitions the internal space.
The support portion projects from the intermediate plate toward the output shaft, and
The aspect according to any one of claims 1 to 4, wherein the receiving portion abuts on the intermediate plate from a side opposite to the support portion and supports the support portion via the intermediate plate. Opening and closing member drive device.
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