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JP5376141B2 - Motor and spring for fixing magnet of motor - Google Patents

Motor and spring for fixing magnet of motor Download PDF

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Publication number
JP5376141B2
JP5376141B2 JP2009140409A JP2009140409A JP5376141B2 JP 5376141 B2 JP5376141 B2 JP 5376141B2 JP 2009140409 A JP2009140409 A JP 2009140409A JP 2009140409 A JP2009140409 A JP 2009140409A JP 5376141 B2 JP5376141 B2 JP 5376141B2
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leaf spring
permanent magnets
portions
spring
yoke
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JP2010288376A (en
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優 庄司
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Mahle Electric Drive Systems Co Ltd
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Kokusan Denki Co Ltd
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Abstract

Provided is a motor, comprising a plurality of arc-shaped permanent magnets which are assembled on the inner periphery of a yoke in parallel, and a magnetic fixing spring inserted in adjacent permanent magnets. The magnetic fixing spring comprises a first and a second plate spring which are disposed in parallel, a connecting part connected to the two plate springs, an arm part disposed at the front end of the second plate spring, and a separating part disposed at the front end of the arm part in an integral body. The magnetic fixing spring is inserted into adjacent permanent magnets, and the separating part is inserted into the two plate springs of the magnetic fixing plate, and a plurality of permanent magnets are suppressed along the circumferential direction and are fixed with respect to the yoke.

Description

本発明は、ヨークの内周に並べて配置した複数の永久磁石をヨークに対して固定するために、隣り合う磁石間に挿入される磁石固定用バネ及びこの磁石固定用バネにより磁石がヨークに対して固定されたモータに関するものである。   In the present invention, in order to fix a plurality of permanent magnets arranged side by side on the inner periphery of the yoke to the yoke, the magnet is fixed to the yoke by the magnet fixing spring inserted between adjacent magnets and the magnet fixing spring. It relates to a fixed motor.

ヨークの内周に複数の円弧状の永久磁石を並べて配置して界磁を構成するモータにおいては、例えば特許文献1に示されているように、磁石相互間に挿入したバネで磁石を周方向に付勢することにより磁石をヨークに対して固定している。   In a motor in which a plurality of arc-shaped permanent magnets are arranged side by side on the inner circumference of a yoke to form a field, for example, as shown in Patent Document 1, the magnet is circumferentially moved by a spring inserted between the magnets. By urging the magnet, the magnet is fixed to the yoke.

特許文献1に示されたモータでは、円筒状に形成されたステータヨークの内周に2個の永久磁石を周方向に並べて配置した状態で、両磁石の間にU字形の磁石固定用バネを圧入することにより、2つの磁石を周方向に付勢してヨークに固定している。   In the motor disclosed in Patent Document 1, a U-shaped magnet fixing spring is interposed between two magnets in a state where two permanent magnets are arranged in the circumferential direction on the inner periphery of a cylindrical stator yoke. By press-fitting, the two magnets are urged in the circumferential direction and fixed to the yoke.

このように、ヨークの内周に永久磁石を固定する手段として、磁石相互間に圧入される磁石固定用バネを用いる場合には、バネを磁石間に圧入する際に、バネから磁石に大きな力が加わる。永久磁石としては通常、欠け易い焼結磁石が用いられるため、磁石固定用バネを磁石に直接接触させた状態で圧入すると、磁石が損傷するおそれがある。   As described above, when a magnet fixing spring that is press-fitted between magnets is used as a means for fixing the permanent magnet to the inner periphery of the yoke, a large force is applied from the spring to the magnet when the spring is pressed between the magnets. Will be added. As a permanent magnet, a sintered magnet that is easily chipped is usually used. If the magnet fixing spring is pressed into contact with the magnet, the magnet may be damaged.

そこで、特許文献1に示されたモータにおいては、磁石固定用バネと磁石との間に樹脂などからなる緩衝材を介在させている。   Therefore, in the motor disclosed in Patent Document 1, a buffer material made of resin or the like is interposed between the magnet fixing spring and the magnet.

特開2000−324733号公報JP 2000-324733 A

特許文献1に示されたように、磁石固定用バネと磁石との間に合成樹脂などからなる緩衝材を介在させた場合には、緩衝材の厚み分だけヨークの周長を長くすることが必要になるため、モータの大形化を招くという問題があった。   As shown in Patent Document 1, when a cushioning material made of synthetic resin or the like is interposed between the magnet fixing spring and the magnet, the circumferential length of the yoke can be increased by the thickness of the cushioning material. Since this is necessary, there is a problem that the size of the motor is increased.

また磁石固定用バネと磁石との間に緩衝材を介在させた場合には、緩衝材により磁石に加わる付勢力が弱められるため、磁石の固定強度が低下するおそれがあった。   In addition, when a cushioning material is interposed between the magnet fixing spring and the magnet, the biasing force applied to the magnet by the cushioning material is weakened, which may reduce the fixing strength of the magnet.

本発明の目的は、磁石の固定強度の低下を招いたり、モータの大形化を招いたりすること無く、磁石をヨークに固定することができる磁石固定用バネ及びこのバネを用いて磁石をヨークに固定したモータを提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a magnet fixing spring that can fix a magnet to a yoke without causing a decrease in the fixing strength of the magnet or an increase in the size of the motor, and a magnet using the spring. It is to provide a motor fixed to the motor.

本願においては、上記の目的を達成するために第1ないし第10の発明が開示される。第1ないし第6の発明は、円筒面状の内周面を有するモータのヨークの内周に並べて配置された複数の円弧状の永久磁石をヨークに対して固定するために、ヨークの内周に配置された隣り合う2つの永久磁石の間に挿入されて複数の永久磁石を周方向に付勢する磁石固定用バネを対象とする。   In the present application, the first to tenth inventions are disclosed in order to achieve the above object. In the first to sixth aspects of the invention, in order to fix a plurality of arc-shaped permanent magnets arranged side by side on the inner periphery of the yoke of the motor having a cylindrical inner peripheral surface to the yoke, the inner periphery of the yoke The object is a magnet fixing spring that is inserted between two adjacent permanent magnets arranged in the direction and biases a plurality of permanent magnets in the circumferential direction.

第1の発明に係わる磁石固定用バネは、幅方向を同方向に向けて並べて配置された第1及び第2の板バネ部と、これら第1及び第2の板バネ部の後端部を相互に連結している連結部と、第1及び第2の板バネ部の少なくとも一方の先端に後端部が連接されて他方の板バネ部側に突出して伸びる腕部とを一体に有して、第1及び第2の板バネ部を隣り合う2つの永久磁石の相対する周方向端面に接触させた状態で両永久磁石の間に挿入されるように構成される。   The magnet fixing spring according to the first aspect of the present invention includes first and second leaf spring portions arranged side by side in the same width direction, and rear end portions of the first and second leaf spring portions. A connecting portion that is connected to each other and an arm portion that has a rear end portion connected to at least one tip of the first and second leaf spring portions and protrudes and extends toward the other leaf spring portion. Thus, the first and second leaf spring portions are configured to be inserted between the two permanent magnets in a state in which the first and second leaf spring portions are in contact with opposite circumferential end surfaces of the two adjacent permanent magnets.

上記腕部は、第1及び第2の板バネ部の間に挿入された際に両板バネ部を互いに離反させる方向に付勢するスペーサとして機能するスペーサ機能部を先端部に有していて、腕部の後端部とスペーサ機能部との間の部分を変位させることによりスペーサ機能部を第1の板バネ部と第2の板バネ部との間に挿入し得るように形成され、2つの永久磁石の間に挿入された第1及び第2の板バネ部の間に上記腕部のスペーサ機能部を挿入した状態にしたときに複数の永久磁石をヨークに固定するために必要な付勢力を発生するように構成されている。   The arm portion has a spacer function portion at the tip portion that functions as a spacer that urges the leaf spring portions in a direction to separate them from each other when inserted between the first and second leaf spring portions. The spacer function portion is formed so as to be inserted between the first leaf spring portion and the second leaf spring portion by displacing the portion between the rear end portion of the arm portion and the spacer function portion, Necessary for fixing a plurality of permanent magnets to the yoke when the spacer function portion of the arm portion is inserted between the first and second leaf spring portions inserted between the two permanent magnets. It is comprised so that a biasing force may be generated.

上記のように構成すると、腕部の先端部のスペーサ機能部を第1の板バネ部と第2の板バネ部との間から離脱させた状態でバネを磁石間に挿入することにより、バネを軽圧入状態で磁石間に挿入することができるため、バネを磁石間に挿入する際に磁石が損傷するおそれをなくすことができる。またバネを磁石間に挿入した後に、腕部の後端部とスペーサ機能部との間の部分を変位させてスペーサ機能部を第1の板バネ部と第2の板バネ部との間に挿入することにより、第1の板バネ部と第2の板バネ部とを押し広げて、磁石をヨークに固定するために必要な付勢力で付勢することができるため、磁石をヨークに強固に固定することができる。   When configured as described above, the spring is inserted between the magnets with the spacer function portion at the tip of the arm portion detached from between the first leaf spring portion and the second leaf spring portion. Can be inserted between the magnets in a light press-fit state, so that the possibility of damaging the magnet when inserting the spring between the magnets can be eliminated. Further, after inserting the spring between the magnets, the portion between the rear end portion of the arm portion and the spacer function portion is displaced so that the spacer function portion is placed between the first leaf spring portion and the second leaf spring portion. By inserting, the first leaf spring portion and the second leaf spring portion can be expanded to be biased with a biasing force necessary to fix the magnet to the yoke. Can be fixed to.

本発明によれば、バネと磁石との間に緩衝材を介在させる必要がないため、バネから磁石に加わる付勢力が弱まるのを防いで、磁石を強固に固定することができる。   According to the present invention, since it is not necessary to interpose a buffer material between the spring and the magnet, it is possible to prevent the biasing force applied to the magnet from the spring from being weakened, and to firmly fix the magnet.

第2の発明に係わる磁石固定用バネは、幅方向を同方向に向けて並べて配置された第1及び第2の板バネ部と、第1及び第2の板バネ部の後端部を相互に連結している連結部と、第1及び第2の板バネ部の一方の先端に後端部が連接されて他方の板バネ部側に突出して伸びる腕部とを一体に備えている。   According to a second aspect of the present invention, there is provided a magnet fixing spring including a first plate spring portion and a second plate spring portion, which are arranged side by side in the same width direction, and a rear end portion of the first and second plate spring portions. And an arm portion that is connected to the tip end of one of the first and second leaf spring portions and has an arm portion that protrudes and extends toward the other leaf spring portion.

本発明においては、第1及び第2の板バネ部のそれぞれの長手方向の中間部に頂部を内側に向けた状態で対向するV字形の第1及び第2のくびれ部が形成されて、該第1のくびれ部と連結部との間の部分の外側及び第2のくびれ部と連結部との間の部分の外側にそれぞれ第1及び第2の後端部側磁石当接面が形成されている。また第1の板バネ部の先端部の外側及び第2の板バネ部の先端部の外側にそれぞれ第1及び第2の先端部側磁石当接面が形成されて、隣り合う2つの永久磁石の間に挿入された際に第1の後端部側磁石当接面と第1の先端部側磁石当接面及び第2の後端部側磁石当接面と第2の先端部側磁石当接面がそれぞれ隣り合う2つの永久磁石の相対する周方向端面の一方及び他方に接するように構成されている。   In the present invention, V-shaped first and second constricted portions facing each other in a state where the top portion is directed inward are formed at the intermediate portions in the longitudinal direction of the first and second leaf spring portions, First and second rear end side magnet contact surfaces are formed on the outside of the portion between the first constriction and the connecting portion and on the outside of the portion between the second constriction and the connecting portion, respectively. ing. Two adjacent permanent magnets having first and second tip side magnet contact surfaces formed on the outside of the tip of the first leaf spring and the tip of the second leaf spring, respectively. When inserted between the first rear end side magnet contact surface and the first front end side magnet contact surface, the second rear end side magnet contact surface and the second front end side magnet. The contact surfaces are configured to contact one and the other of the opposing circumferential end surfaces of two adjacent permanent magnets.

また腕部は、第1及び第2の板バネ部のくびれ部の間に挿入された際に両板バネ部を互いに離反させる方向に付勢するスペーサとして機能するスペーサ機能部を先端部に有して、腕部の後端部とスペーサ機能部との間の部分を変位させることによりスペーサ機能部を第1のくびれ部の頂部と第2のくびれ部の頂部との間に挿入し得るように構成され、2つの永久磁石の間に挿入された状態で第1及び第2の板バネ部のくびれ部の間に腕部の先端部のスペーサ機能部が挿入されたときに複数の永久磁石をヨークに固定するために必要な付勢力を発生するように構成されている。   The arm portion has a spacer function portion at the distal end portion that functions as a spacer that urges the leaf spring portions in a direction to separate them from each other when inserted between the constricted portions of the first and second leaf spring portions. Then, the spacer function part can be inserted between the top part of the first constriction part and the top part of the second constriction part by displacing the part between the rear end part of the arm part and the spacer function part. A plurality of permanent magnets when the spacer function portion at the tip of the arm portion is inserted between the constricted portions of the first and second leaf spring portions in a state of being inserted between the two permanent magnets Is configured to generate a biasing force necessary to fix the motor to the yoke.

第3の発明に係わる磁石固定用バネは、幅方向を同方向に向けて並べて配置された第1及び第2の板バネ部と、第1及び第2の板バネ部の後端部を相互に連結している連結部と、第1及び第2の板バネ部の先端にそれぞれ後端部が連接されて第2の板バネ部側及び第1の板バネ部側に突出して伸びる第1及び第2の腕部とを一体に備えている。   According to a third aspect of the present invention, there is provided a magnet fixing spring including a first leaf spring portion and a second leaf spring portion arranged with the width direction aligned in the same direction, and the rear end portions of the first and second leaf spring portions. And a first end that is connected to the front end of each of the first and second leaf springs and that protrudes and extends toward the second leaf spring and the first leaf spring. And a second arm part.

本発明においても、第1及び第2の板バネ部のそれぞれの長手方向の中間部に頂部を内側に向けた状態で対向するV字形の第1及び第2のくびれ部が形成されて、該第1のくびれ部と連結部との間の部分の外側及び第2のくびれ部と連結部との間の部分の外側にそれぞれ第1及び第2の後端部側磁石当接面が形成される。また第1の板バネ部の先端部の外側及び第2の板バネ部の先端部の外側にそれぞれ第1及び第2の先端部側磁石当接面が形成され、第1及び第2の板バネ部を隣り合う2つの永久磁石の間に挿入した際に第1の後端部側磁石当接面と第1の先端部側磁石当接面及び第2の後端部側磁石当接面と第2の先端部側磁石当接面がそれぞれ隣り合う2つの永久磁石の相対する周方向端面の一方及び他方に接した状態で配置される。   Also in the present invention, V-shaped first and second constricted portions that are opposed to each other in a state in which the top portion is directed inward are formed at intermediate portions in the longitudinal direction of the first and second leaf spring portions, First and second rear end side magnet contact surfaces are formed on the outside of the portion between the first constriction and the connecting portion and on the outside of the portion between the second constriction and the connecting portion, respectively. The Also, first and second tip side magnet contact surfaces are formed on the outside of the tip portion of the first leaf spring portion and on the outside of the tip portion of the second leaf spring portion, respectively, and the first and second plates The first rear end side magnet contact surface, the first front end side magnet contact surface, and the second rear end side magnet contact surface when the spring portion is inserted between two adjacent permanent magnets. And the 2nd tip part side magnet contact surface is arranged in the state which touched one and the other of the peripheral direction end face which two permanent magnets which adjoin, respectively.

上記第1及び第2の腕部はそれぞれ、第1及び第2の板バネ部のくびれ部の間に重ね合せた状態で挿入された際に両板バネ部を互いに離反させる方向に付勢するスペーサとして機能する第1及び第2のスペーサ機能部を先端部を有して、第1及び第2の腕部のそれぞれの後端部と第1及び第2のスペーサ機能部との間の部分を変位させることにより第1及び第2のスペーサ機能部を第1及び第2のくびれ部の間に挿入し得るように構成され、2つの永久磁石の間に挿入された状態で第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に第1及び第2の腕部にそれぞれ形成された第1及び第2のスペーサ機能部が重ね合された状態で挿入されたときに複数の永久磁石をヨークに固定するために必要な付勢力を発生するように構成されている。   When the first and second arm portions are inserted in a state of being overlapped between the constricted portions of the first and second leaf spring portions, the first and second arm portions are urged in a direction to separate the leaf spring portions from each other. The first and second spacer function parts functioning as spacers have tip parts, and portions between the rear end parts of the first and second arm parts and the first and second spacer function parts. The first and second spacer function parts can be inserted between the first and second constriction parts by displacing the first plate, and the first plate is inserted between the two permanent magnets. The first and second spacer function portions respectively formed on the first and second arm portions are inserted between the constriction portion of the spring portion and the constriction portion of the second leaf spring portion in a state of being overlapped. It is configured to generate the biasing force necessary to fix a plurality of permanent magnets to the yoke when There.

第4の発明に係わる磁石固定用バネは、平板状に形成された帯板状の第1の板バネ部と、幅方向を第1の板バネ部の幅方向と同方向に向けた状態で第1の板バネ部と並べて配置されて長手方向の中間部に頂部を第1の板バネ部側に向けた状態で該第1の板バネ部に対向するV字形のくびれ部が形成された第2の板バネ部と、第1及び第2の板バネ部の後端部を相互に連結している連結部と、第2の板バネ部の先端に後端部が連接されて第1の板バネ部側に突出して伸びる腕部とを一体に備えている。   A magnet fixing spring according to a fourth aspect of the present invention is a strip-shaped first plate spring portion formed in a flat plate shape, with the width direction directed in the same direction as the width direction of the first plate spring portion. A V-shaped constricted portion facing the first leaf spring portion is formed in a state where the top portion is directed to the first leaf spring portion side and is arranged side by side with the first leaf spring portion. A second leaf spring portion, a coupling portion that interconnects the rear end portions of the first and second leaf spring portions, and a rear end portion that is connected to the tip of the second leaf spring portion; And an arm portion that protrudes and extends toward the leaf spring portion side.

本発明においては、第2の板バネ部のくびれ部と連結部との間の部分の外側に後端部側磁石当接面が形成されるとともに、第2の板バネ部の先端部の外側に先端部側磁石当接面が形成されて、隣り合う2つの永久磁石の間に挿入された際に第1の板バネ部の外面が一方の永久磁石の周方向端面に接すると共に、第2の板バネ部の後端部側磁石当接面と先端部側磁石当接面とが他方の永久磁石の周方向端面に接した状態で配置されるように構成されている。   In the present invention, the rear end side magnet contact surface is formed outside the portion between the constricted portion and the connecting portion of the second leaf spring portion, and the outside of the tip portion of the second leaf spring portion. And the outer surface of the first leaf spring portion is in contact with the circumferential end surface of one of the permanent magnets when the tip side magnet contact surface is formed between the two adjacent permanent magnets. The rear end side magnet contact surface and the front end side magnet contact surface of the leaf spring portion are arranged in contact with the circumferential end surface of the other permanent magnet.

また腕部は、第1の板バネ部と第2の板バネ部のくびれ部の頂部との間に挿入された際に両板バネ部を互いに離反させようとする方向に付勢するスペーサとして機能するスペーサ機能部を先端部を有して、腕部の後端部とスペーサ機能部との間の部分をくびれ部側に変位させることによりスペーサ機能部を第1の板バネ部と第2の板バネ部のくびれ部との間に挿入し得るように構成され、ヨークの内周に配置された隣り合う2つの永久磁石の間に挿入された状態で第1の板バネ部と第2の板バネ部のくびれ部との間に腕部のスペーサ機能部が挿入されたときに、複数の永久磁石をヨークに固定するために必要な付勢力を発生するように構成されている。   The arm portion is a spacer that urges the leaf spring portions in a direction to separate them from each other when inserted between the first leaf spring portion and the top of the constricted portion of the second leaf spring portion. The functioning spacer function part has a tip part, and the part between the rear end part of the arm part and the spacer function part is displaced toward the constriction part side, thereby moving the spacer function part to the first leaf spring part and the second leaf spring part. The first leaf spring portion and the second leaf spring portion are inserted between two adjacent permanent magnets arranged on the inner periphery of the yoke. When the spacer function portion of the arm portion is inserted between the constricted portion of the leaf spring portion, a biasing force necessary for fixing the plurality of permanent magnets to the yoke is generated.

第5の発明は、第2の発明に適用されるもので、本発明においては、スペーサ機能部を第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に挿入したときに第1の板バネ部のくびれ部の内面または第2の板バネ部のくびれ部に係合してスペーサ機能部が第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間から離脱するのを阻止する係合部がスペーサ機能部の先端に設けられている。   The fifth invention is applied to the second invention. In the present invention, the spacer function portion is inserted between the constriction portion of the first leaf spring portion and the constriction portion of the second leaf spring portion. The spacer function portion engages with the inner surface of the constricted portion of the first leaf spring portion or the constricted portion of the second leaf spring portion, so that the spacer function portion moves between the constricted portion of the first leaf spring portion and the second leaf spring portion. An engaging portion for preventing separation from the constricted portion is provided at the tip of the spacer function portion.

上記のように、スペーサ機能部の先端に係合部を設けて、スペーサ機能部を第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に挿入した状態で、スペーサ機能部の先端の係合部が板バネ部のくびれ部に係合するようにしておくと、振動などにより、スペーサ機能部が第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間から離脱するのを防ぐことができる。   As described above, with the engagement portion provided at the tip of the spacer function portion, the spacer function portion is inserted between the constriction portion of the first leaf spring portion and the constriction portion of the second leaf spring portion, If the engaging part at the tip of the spacer function part is engaged with the constriction part of the leaf spring part, the spacer function part is caused to vibrate by the neck part of the first leaf spring part and the second leaf spring part due to vibration or the like. It is possible to prevent detachment from between the constricted part.

第6の発明は、第4の発明に適用されるもので、本発明においては、スペーサ機能部を第1の板バネ部と第2の板バネ部のくびれ部との間に挿入したときに第2の板バネ部のくびれ部に係合してスペーサ機能部が第1の板バネ部と第2の板バネ部のくびれ部との間から離脱するのを阻止する係合部がスペーサ機能部の先端に設けられている。このように構成した場合も、第5の発明と同様の効果を得ることができる。   The sixth invention is applied to the fourth invention. In the present invention, when the spacer function portion is inserted between the first leaf spring portion and the constriction portion of the second leaf spring portion. An engagement portion that engages with the constriction portion of the second leaf spring portion and prevents the spacer function portion from being separated from between the first leaf spring portion and the constriction portion of the second leaf spring portion is a spacer function. It is provided at the tip of the part. Also when comprised in this way, the effect similar to 5th invention can be acquired.

本願に開示された第7ないし第10の発明は、円筒面状の内周面を有するヨークと、周方向に並べた状態でヨークの内周に配置された複数の円弧状の永久磁石と、隣り合わせに配置された2つの永久磁石の周方向端面の間に挿入された磁石固定用バネとを備えて、該磁石固定用バネにより複数の永久磁石が周方向に付勢された状態でヨークに対して固定されているモータを対象とする。   The seventh to tenth inventions disclosed in the present application are a yoke having a cylindrical inner peripheral surface, a plurality of arc-shaped permanent magnets arranged on the inner periphery of the yoke in a state of being arranged in the circumferential direction, A magnet fixing spring inserted between the circumferential end faces of two permanent magnets arranged side by side, and the plurality of permanent magnets being urged in the circumferential direction by the magnet fixing spring to the yoke The target is a fixed motor.

第7の発明に係わるモータにおいては、磁石固定用バネとして、第1の発明に係わる磁石固定用バネが用いられて、隣り合う永久磁石の間に該磁石固定用バネが挿入され、第1及び第2の板バネ部の間に腕部の先端部のスペーサ機能部が挿入されて複数の永久磁石がヨークに対して固定されている。   In the motor according to the seventh invention, the magnet fixing spring according to the first invention is used as the magnet fixing spring, and the magnet fixing spring is inserted between adjacent permanent magnets. A spacer function portion at the tip of the arm portion is inserted between the second leaf spring portions, and a plurality of permanent magnets are fixed to the yoke.

第8の発明に係わるモータにおいては、磁石固定用バネとして、第2の発明に係わる磁石固定用バネが用いられて、隣り合う永久磁石の間に該磁石固定用バネが挿入され、第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に腕部の先端部のスペーサ機能部が挿入されて複数の永久磁石がヨークに対して固定されている。   In the motor according to the eighth invention, the magnet fixing spring according to the second invention is used as the magnet fixing spring, and the magnet fixing spring is inserted between the adjacent permanent magnets. A spacer function portion at the tip of the arm portion is inserted between the constriction portion of the leaf spring portion and the constriction portion of the second leaf spring portion, and a plurality of permanent magnets are fixed to the yoke.

第9の発明に係わるモータにおいては、磁石固定用バネとして、第3の発明に係わる磁石固定用バネが用いられて、隣り合う永久磁石の間に該磁石固定用バネが挿入され、第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に第1及び第2の腕部にそれぞれ形成された第1及び第2のスペーサ機能部が重ね合せた状態で挿入されて複数の永久磁石がヨークに対して固定されている。   In the motor according to the ninth invention, the magnet fixing spring according to the third invention is used as the magnet fixing spring, and the magnet fixing spring is inserted between adjacent permanent magnets. The first and second spacer function portions respectively formed on the first and second arm portions are inserted between the constriction portion of the leaf spring portion and the constriction portion of the second leaf spring portion in a state of being overlapped. A plurality of permanent magnets are fixed to the yoke.

第10の発明に係わるモータにおいては、磁石固定用バネとして、第4の発明に係わる磁石固定用バネが用いられて、隣り合う永久磁石の間に該磁石固定用バネが挿入され、第1の板バネ部と第2の板バネ部のくびれ部との間に腕部のスペーサ機能部が挿入されて複数の永久磁石がヨークに対して固定されている。   In the motor according to the tenth invention, the magnet fixing spring according to the fourth invention is used as the magnet fixing spring, and the magnet fixing spring is inserted between the adjacent permanent magnets. A spacer function portion of an arm portion is inserted between the leaf spring portion and the constriction portion of the second leaf spring portion, and a plurality of permanent magnets are fixed to the yoke.

上記のように、本発明によれば、腕部の先端部のスペーサ機能部を第1の板バネ部と第2の板バネ部との間から離脱させた状態でバネを磁石間に挿入することにより、バネを軽圧入状態で磁石間に挿入することができるため、バネを磁石間に挿入する際に磁石が損傷するおそれをなくすことができる。   As described above, according to the present invention, the spring is inserted between the magnets in a state where the spacer function portion at the tip of the arm portion is detached from between the first leaf spring portion and the second leaf spring portion. Thus, since the spring can be inserted between the magnets in a light press-fit state, the possibility of damaging the magnet when inserting the spring between the magnets can be eliminated.

また本発明によれば、バネを磁石間に挿入した後に、腕部の後端部とスペーサ機能部との間の部分を変位させてスペーサ機能部を第1の板バネ部と第2の板バネ部との間に挿入することにより、第1の板バネ部と第2の板バネ部とを押し広げて、磁石をヨークに固定するために必要な付勢力で付勢することができるため、磁石をヨークに強固に固定することができる。   According to the invention, after the spring is inserted between the magnets, the portion between the rear end portion of the arm portion and the spacer function portion is displaced so that the spacer function portion becomes the first leaf spring portion and the second plate. By inserting between the spring portion, the first leaf spring portion and the second leaf spring portion can be spread and biased with the biasing force necessary to fix the magnet to the yoke. The magnet can be firmly fixed to the yoke.

また第5の発明または第6の発明のように、スペーサ機能部の先端に係合部を設けて、スペーサ機能部を第1の板バネ部と第2の板バネ部との間に挿入した状態で、この係合部をいずれかの板バネ部のくびれ部に係合させるように構成した場合には、振動などによりスペーサ機能部が第1の板バネ部と第2の板バネ部との間から離脱するのを確実に防ぐことができるため、磁石の固定を確実に行わせることができる。   Further, as in the fifth or sixth invention, an engaging portion is provided at the tip of the spacer function portion, and the spacer function portion is inserted between the first leaf spring portion and the second leaf spring portion. In this state, when the engaging portion is configured to be engaged with the constricted portion of one of the leaf spring portions, the spacer function portion is caused by vibration or the like so that the first leaf spring portion and the second leaf spring portion are Since it is possible to reliably prevent separation from between the two, the magnet can be securely fixed.

本発明によれば、バネと磁石との間に緩衝材を介在させる必要がないため、バネから磁石に加わる付勢力が弱まるのを防いで、磁石を強固に固定することができる。またバネと磁石との間に緩衝材を介在させる必要がないため、ヨークの周長が長くなるのを防いで、モータが大形化するのを防ぐことができる。   According to the present invention, since it is not necessary to interpose a buffer material between the spring and the magnet, it is possible to prevent the biasing force applied to the magnet from the spring from being weakened, and to firmly fix the magnet. Further, since it is not necessary to interpose a buffer material between the spring and the magnet, it is possible to prevent the yoke from becoming long and prevent the motor from becoming large.

本発明に係わるモータの一実施形態で用いるステータを示した正面図である。It is the front view which showed the stator used with one Embodiment of the motor concerning this invention. 同実施形態において、磁石をステータヨークに固定するために用いる磁石固定用バネの一実施形態を示した正面図である。In the same embodiment, it is the front view which showed one Embodiment of the spring for magnet fixation used in order to fix a magnet to a stator yoke. (A)は図2に示した磁石固定用バネを磁石間に挿入する過程を説明するための縦断面図、(B)は同磁石固定用バネを磁石間に挿入した後バネの腕部の先端のスペーサ機能部を第1及び第2の板バネ部の間に挿入する過程を説明するための縦断面図である。(A) is a longitudinal sectional view for explaining the process of inserting the magnet fixing spring shown in FIG. 2 between the magnets, and (B) is the arm part of the spring after the magnet fixing spring is inserted between the magnets. It is a longitudinal cross-sectional view for demonstrating the process in which the spacer function part of a front-end | tip is inserted between the 1st and 2nd leaf | plate spring part. 本発明に係わる磁石固定用バネの他の実施形態を示したもので、(A)は同バネを磁石間に挿入する前の状態を示した正面図、(B)は同バネを磁石間に挿入した後腕部の先端のスペーサ機能部を第1及び第2の板バネ部の間に挿入した状態を示した正面図である。The other embodiment of the magnet fixing spring concerning this invention is shown, (A) is the front view which showed the state before inserting the spring between magnets, (B) is the same spring between magnets. It is the front view which showed the state which inserted the spacer function part of the front-end | tip of the inserted rear arm part between the 1st and 2nd leaf | plate spring part. (A)は本発明に係わる磁石固定用バネの更に他の実施形態を示した正面図、(B)は(A)の磁石固定用バネの腕部の先端のスペーサ機能部を第1及び第2の板バネ部の間に挿入した状態を示した正面図である。(A) is a front view showing still another embodiment of the magnet fixing spring according to the present invention, (B) is the first and first spacer function part at the tip of the arm part of the magnet fixing spring of (A). It is the front view which showed the state inserted between 2 leaf | plate spring parts. (A)は本発明に係わる磁石固定用バネの更に他の実施形態を示した正面図、(B)は(A)の磁石固定用バネの腕部の先端のスペーサ機能部を第1及び第2の板バネ部の間に挿入した状態を示した正面図である。(A) is a front view showing still another embodiment of the magnet fixing spring according to the present invention, (B) is the first and first spacer function part at the tip of the arm part of the magnet fixing spring of (A). It is the front view which showed the state inserted between 2 leaf | plate spring parts.

以下図1ないし図3を参照して本発明に係わるモータの一実施形態及び該モータで用いる磁石固定用バネの一実施形態を説明する。
図1は本実施形態に係わるモータのステータを示したもので、同図において1は鉄等の強磁性材料からなるステータヨークである。図示のステータヨーク1は、カップ状に形成されたヨーク本体101と、ヨーク本体101の開口端から外側に突出した状態で設けられた鍔板部102とからなっている。ヨーク本体101の底壁部の中央には図示しないロータの回転軸を支持するためのボス部材2が取付けられている。鍔板部102には取り付け孔104が設けられている。
Hereinafter, an embodiment of a motor according to the present invention and an embodiment of a magnet fixing spring used in the motor will be described with reference to FIGS.
FIG. 1 shows a stator of a motor according to the present embodiment. In FIG. 1, reference numeral 1 denotes a stator yoke made of a ferromagnetic material such as iron. The illustrated stator yoke 1 includes a yoke body 101 formed in a cup shape, and a flange plate portion 102 provided so as to protrude outward from the opening end of the yoke body 101. A boss member 2 for supporting a rotating shaft of a rotor (not shown) is attached to the center of the bottom wall portion of the yoke body 101. A mounting hole 104 is provided in the saddle plate portion 102.

ステータヨーク1は、そのヨーク本体101の周壁部の内周に永久磁石を取り付けるための内周面105を有し、4個の円弧状の永久磁石3aないし3dは、それぞれの周方向をヨーク1の内周面105の周方向に一致させ、かつそれぞれの軸線方向の一端をヨーク1の底面に当接させた状態で、ヨークの内周面105上に並べて配置されている。   The stator yoke 1 has an inner peripheral surface 105 for attaching a permanent magnet to the inner periphery of the peripheral wall portion of the yoke body 101, and the four arc-shaped permanent magnets 3a to 3d are arranged in the circumferential direction of the yoke 1 respectively. These are arranged side by side on the inner peripheral surface 105 of the yoke in a state where they are aligned with the circumferential direction of the inner peripheral surface 105 and one end in the axial direction is in contact with the bottom surface of the yoke 1.

図示の例では、磁石3aと3b及び磁石3cと3dがそれぞれの隣接する周方向端面を互いに接触させた状態で配置され、磁石3bと3cの隣接する周方向端面の間及び磁石3dと3eの隣接する周方向端面の間にそれぞれ磁石固定用バネを挿入するための隙間が形成されている。   In the illustrated example, the magnets 3a and 3b and the magnets 3c and 3d are arranged with their adjacent circumferential end faces in contact with each other, and between the adjacent circumferential end faces of the magnets 3b and 3c and between the magnets 3d and 3e. A gap for inserting a magnet fixing spring is formed between adjacent end faces in the circumferential direction.

磁石3bと3cの隣接する周方向端面の間に形成された隙間内及び磁石3dと3aの隣接する周方向端面の間に形成された隙間内に磁石固定用バネ4が挿入され、各隙間内に挿入された磁石固定用バネ4により永久磁石3a〜3dが周方向に付勢されている。永久磁石3a〜3dは、バネ4によって周方向に付勢されることにより相互に拘束されてヨーク1の内周面105に固定されている。   The magnet fixing spring 4 is inserted into the gap formed between the adjacent circumferential end faces of the magnets 3b and 3c and into the gap formed between the adjacent circumferential end faces of the magnets 3d and 3a. The permanent magnets 3a to 3d are urged in the circumferential direction by the magnet fixing spring 4 inserted into the magnet. The permanent magnets 3 a to 3 d are fixed to the inner peripheral surface 105 of the yoke 1 by being urged in the circumferential direction by the spring 4 and restrained from each other.

ステータヨーク1と、その内周に配置された永久磁石3aないし3dと、これらの永久磁石をステータヨーク1に対して固定している磁石固定用バネ4とにより、モータのステータ5が構成されている。永久磁石3aないし3dは、ステータヨーク1の周方向に並ぶ所定数の磁極を形成するように着磁され、これらの永久磁石によりステータの界磁が構成されている。   The stator 5 of the motor is constituted by the stator yoke 1, the permanent magnets 3a to 3d disposed on the inner periphery thereof, and the magnet fixing spring 4 that fixes these permanent magnets to the stator yoke 1. Yes. The permanent magnets 3a to 3d are magnetized so as to form a predetermined number of magnetic poles arranged in the circumferential direction of the stator yoke 1, and the field of the stator is constituted by these permanent magnets.

ステータ5の永久磁石3a〜3dの内側には、ステータ5と共にモータを構成する図示しないロータが配置される。ロータの回転軸は、ステータヨーク1の底壁部に取り付けられたボス部材2に支持された軸受けと、ステータヨーク1の開口部を閉じる図示しないカバーに支持された軸受けとにより回転自在に支持される。   A rotor (not shown) that constitutes a motor together with the stator 5 is disposed inside the permanent magnets 3 a to 3 d of the stator 5. The rotating shaft of the rotor is rotatably supported by a bearing supported by a boss member 2 attached to the bottom wall portion of the stator yoke 1 and a bearing supported by a cover (not shown) that closes the opening of the stator yoke 1. The

本実施形態で用いる磁石固定用バネ4は、バネ性を持たせることができる帯板状の金属板(例えばバネ用鋼板)を図2に示したように成形してバネ性を与えるための熱処理を行うことにより形成される。図示の磁石固定用バネ4は、幅方向を同方向に向けて並べて配置された第1及び第2の板バネ部401及び402と、第1及び第2の板バネ部401及び402の後端部を相互に連結している連結部403とからなるバネ本体部と、第1及び第2の板バネ部の一方(図示の例では第2の板バネ部402)の先端に後端部が連接されて他方の板バネ部(図示の例では第1の板バネ部401)側に突出して伸びる腕部404とを一体に有している。   The magnet fixing spring 4 used in the present embodiment is a heat treatment for providing a spring property by forming a strip-like metal plate (for example, a spring steel plate) as shown in FIG. It is formed by performing. The illustrated magnet fixing spring 4 includes first and second leaf spring portions 401 and 402 arranged side by side in the same width direction, and rear ends of the first and second leaf spring portions 401 and 402. A rear end portion at the front end of one of the spring main body portion and the first and second leaf spring portions (second leaf spring portion 402 in the illustrated example). An arm portion 404 that is connected and protrudes toward the other leaf spring portion (the first leaf spring portion 401 in the illustrated example) is integrally provided.

図2に示された磁石固定用バネ4の第1及び第2の板バネ部401及び402は、それぞれの長手方向の中間部に頂部を内側に向けたV字形の第1及び第2のくびれ部401a及び402aを有して、第1及び第2のくびれ部401a及び402aの頂部401a1及び402a1同士が対向した状態で配置されるように形成され、第1のくびれ部401aと連結部403との間の部分の外側及び第2のくびれ部402aと連結部403との間の部分の外側にそれぞれ第1及び第2の後端部側磁石当接面401b及び402bが形成されている。   The first and second leaf spring portions 401 and 402 of the magnet fixing spring 4 shown in FIG. 2 are V-shaped first and second constrictions with the tops facing inward in the middle portions of the respective longitudinal directions. The first and second constricted portions 401a and 402a are arranged such that the top portions 401a1 and 402a1 of the first and second constricted portions 401a and 402a face each other; the first constricted portion 401a and the connecting portion 403; First and second rear end side magnet contact surfaces 401b and 402b are respectively formed on the outside of the portion between and the outside of the portion between the second constricted portion 402a and the connecting portion 403.

また第1及び第2の板バネ部401及び402の先端部の外側にそれぞれ外側に凸に湾曲した第1及び第2の先端部側磁石当接面401c及び402cが形成され、第1及び第2の板バネ部401及び402と連結部403とからなるバネ本体部が、正面から見てほぼ鼓(つづみ)形を呈するように形成されている。   Also, first and second tip side magnet contact surfaces 401c and 402c that are convexly curved outward are formed on the outside of the tip portions of the first and second leaf spring portions 401 and 402, respectively. The spring main body portion composed of the two leaf spring portions 401 and 402 and the connecting portion 403 is formed to have a substantially drum shape when viewed from the front.

磁石固定用バネ4の腕部404は、第1及び第2の板バネ部401及び402の間に挿入された際に両板バネ部を互いに離反させる方向に付勢するスペーサとして機能するスペーサ機能部404aを先端部に有して、腕部404の後端部とスペーサ機能部404aとの間の部分404bをくびれ部401a及び402a側に変位させて腕部404を変形させることにより、スペーサ機能部404aを第1の板バネ部401と第2の板バネ部402との間に挿入し得るように構成されている。   The arm portion 404 of the magnet fixing spring 4 functions as a spacer that functions as a spacer that urges the two leaf spring portions in a direction to move away from each other when inserted between the first and second leaf spring portions 401 and 402. By having the portion 404a at the tip, and displacing the portion 404b between the rear end portion of the arm portion 404 and the spacer function portion 404a toward the constricted portions 401a and 402a to deform the arm portion 404, the spacer function The portion 404 a is configured to be inserted between the first leaf spring portion 401 and the second leaf spring portion 402.

図示の例では、腕部404の先端部寄りの部分が第1及び第2のくびれ部401a及び402a側に直角に折り曲げられて、腕部404全体がほぼ逆L字形を呈するように形成され、腕部404のくびれ部401a及び402a側に伸びる先端部が板状を呈するスペーサ機能部404aとなっている。本実施形態では、腕部404の後端部とスペーサ機能部404aとの間の部分404bをくびれ部401a及び402a側に変位させて腕部404を変形させることにより、図3(B)に示すように、スペーサ機能部404aを、くびれ部401aの頂部401a1とくびれ部402aの頂部402a1との間に挿入し得るようになっている。   In the illustrated example, the portion near the tip of the arm portion 404 is bent at a right angle toward the first and second constricted portions 401a and 402a, and the entire arm portion 404 is formed to have a substantially inverted L shape, A distal end portion of the arm portion 404 extending toward the constricted portions 401a and 402a is a spacer function portion 404a having a plate shape. In the present embodiment, the portion 404b between the rear end portion of the arm portion 404 and the spacer function portion 404a is displaced toward the constricted portions 401a and 402a to deform the arm portion 404, as shown in FIG. Thus, the spacer function part 404a can be inserted between the top part 401a1 of the constricted part 401a and the top part 402a1 of the constricted part 402a.

磁石固定用バネ4を成形した後、その全体にバネ性を持たせるように熱処理した場合、腕部404もバネ性を有することになるが、スペーサ機能部404aを第1の板バネ部401のくびれ部401aの頂部401a1と第2の板バネ部402のくびれ部402aの頂部402a1との間に挿入した状態で、磁石固定用バネ4が発生する付勢力を十分に大きくして、スペーサ機能部404aとくびれ部401aの頂部及びくびれ部402aの頂部との間に働く摩擦抵抗を十分に大きくするようにしておけば、スペーサ機能部404aを第1の板バネ部401のくびれ部401aと第2の板バネ部402のくびれ部402aとの間に挟み込まれた状態に保持することができる。   When the magnet fixing spring 4 is molded and then heat-treated so as to give the whole spring property, the arm portion 404 also has the spring property, but the spacer function portion 404 a is formed on the first plate spring portion 401. In a state where the magnet fixing spring 4 is sufficiently increased in a state of being inserted between the top portion 401a1 of the constricted portion 401a and the top portion 402a1 of the constricted portion 402a of the second leaf spring portion 402, the spacer function portion If the frictional resistance acting between 404a and the top of the constricted part 401a and the top of the constricted part 402a is made sufficiently large, the spacer function part 404a is connected to the constricted part 401a and the second part of the first leaf spring part 401. The plate spring portion 402 can be held in a state of being sandwiched between the constricted portion 402a.

また腕部404の部分を、塑性変形が可能になるように局部的に熱処理しておくと、スペーサ機能部404aを、くびれ部401aの頂部401a1とくびれ部402aの頂部402a1との間に介在させた状態により確実に保持することができる。   Further, if the arm portion 404 is locally heat-treated so that plastic deformation is possible, the spacer function portion 404a is interposed between the top portion 401a1 of the constricted portion 401a and the top portion 402a1 of the constricted portion 402a. It can be reliably held by the state.

図示の磁石固定用バネ4は、腕部404のスペーサ機能部404aをくびれ部401a及び402aの頂部401a1,402a1間から離脱させた図2の状態で、第1及び第2の板バネ部401及び402と連結部403とからなるバネ本体部が、隣り合う2つの永久磁石の間に挿入されて、第1及び第2の後端部側磁石当接面401b及び402bと第1及び第2の先端部側磁石当接面401c及び402cとを、隣り合う2つの永久磁石の相対する周方向端面に接触させた状態で配置される。   The illustrated magnet fixing spring 4 has the first and second leaf spring portions 401 and 401 in the state shown in FIG. 2 in which the spacer function portion 404a of the arm portion 404 is separated from the top portions 401a1 and 402a1 of the constricted portions 401a and 402a. A spring main body portion composed of 402 and a connecting portion 403 is inserted between two adjacent permanent magnets, and the first and second rear end side magnet contact surfaces 401b and 402b and the first and second It arrange | positions in the state which made the front-end | tip part magnet contact surface 401c and 402c contact the circumferential direction end surface which two adjacent permanent magnets oppose.

本実施形態において、磁石固定用バネ4を隣り合う永久磁石相互間に挿入する前の状態では、図2に示すように、スペーサ機能部404aを第1及び第2の板バネ部401及び402のくびれ部の間から離脱させた状態にしておく。磁石固定用バネを隣り合う永久磁石の間の隙間に挿入する前の状態では、図2に示したように、第1及び第2のくびれ部401a及び402aの頂部401a1及び402a1同士が隙間を介して対向している状態にあって、第1及び第2の後端部側磁石当接面401b及び402b相互間の間隔並びに第1及び第2の先端部側磁石当接面401c及び402c相互間の間隔が隣り合う永久磁石相互間の間隔(磁石固定用バネを挿入する隙間の大きさ)よりも大きい値を示すように、第1及び第2の後端部側磁石当接面401b及び402b相互間の間隔並びに第1及び第2の先端部側磁石当接面401c及び402c相互間の間隔が設定されている。   In the present embodiment, in a state before the magnet fixing spring 4 is inserted between the adjacent permanent magnets, the spacer function portion 404a is connected to the first and second leaf spring portions 401 and 402 as shown in FIG. Keep it separated from the constriction. In a state before the magnet fixing spring is inserted into the gap between the adjacent permanent magnets, as shown in FIG. 2, the top portions 401a1 and 402a1 of the first and second constricted portions 401a and 402a pass through the gap. The distance between the first and second rear end side magnet contact surfaces 401b and 402b and the distance between the first and second tip end side magnet contact surfaces 401c and 402c. The first and second rear end side magnet contact surfaces 401b and 402b are set so that the distance between them is larger than the distance between adjacent permanent magnets (the size of the gap for inserting the magnet fixing spring). The distance between each other and the distance between the first and second tip side magnet contact surfaces 401c and 402c are set.

また磁石固定用バネ4の本体部(板バネ部401及び402と連結部403とからなる部分)が発生するバネ力は、磁石固定用バネのバネ本体部を隣り合う2つの永久磁石3a,3d間及び3b,3c間に軽圧入状態で圧入することができる程度の大きさに設定されている。   Further, the spring force generated by the main body portion of the magnet fixing spring 4 (the portion consisting of the leaf spring portions 401 and 402 and the connecting portion 403) generates two permanent magnets 3a and 3d adjacent to the spring main body portion of the magnet fixing spring. It is set to such a size that it can be press-fitted in a light press-fitted state between the gaps 3b and 3c.

更に、この磁石固定用バネ4のバネ本体部全体を隣り合う永久磁石の間に挿入した状態にしたときに、両くびれ部の頂部401a1及び402a1が、隙間が零の状態で対向した状態で(互いに接した状態で)配置されるように、第1及び第2の後端部側磁石当接面401b及び402b相互間の間隔と、第1及び第2の先端部側磁石当接面401c及び402c相互間の間隔とが設定されている。   Furthermore, when the whole spring body of the magnet fixing spring 4 is inserted between the adjacent permanent magnets, the tops 401a1 and 402a1 of both constricted portions are opposed to each other with zero gap ( The first and second rear end side magnet contact surfaces 401b and 402b, and the first and second front end side magnet contact surfaces 401c and An interval between 402c is set.

ここで、「軽圧入状態」とは、第1及び第2の後端部側磁石当接面401b及び402bと第1及び第2の先端部側磁石当接面401c及び402cとを隣り合う磁石の周方向端面に、磁石を損傷するおそれがない程度の比較的小さな圧力で摺動接触させながら圧入が行われる状態を意味する。   Here, the “light press-fitted state” means that the first and second rear end side magnet contact surfaces 401b and 402b and the first and second tip end side magnet contact surfaces 401c and 402c are adjacent to each other. This is a state in which press-fitting is performed while making sliding contact with a relatively small pressure such that there is no possibility of damaging the magnet.

また、図3(B)に示すように、隣り合う永久磁石の間に挿入された磁石固定用バネのくびれ部401a,402aの間に腕部404の先端のスペーサ機能部404aを挿入したときに、第1及び第2の板バネ部401及び402が押し広げられて、磁石固定用バネ4から永久磁石3aないし3dに、これらの永久磁石を固定するために必要にして十分な付勢力Fが与えられるように、バネ本体部が発生するバネ力とスペーサ機能部404aの厚さとが設定されている。   Further, as shown in FIG. 3B, when the spacer function portion 404a at the tip of the arm portion 404 is inserted between the constricted portions 401a and 402a of the magnet fixing spring inserted between the adjacent permanent magnets. The first and second leaf springs 401 and 402 are spread out, and a sufficient urging force F is necessary to fix the permanent magnets from the magnet fixing spring 4 to the permanent magnets 3a to 3d. As shown, the spring force generated by the spring body and the thickness of the spacer function part 404a are set.

本実施形態の磁石固定用バネ4を用いて永久磁石3aないし3dをヨーク1に固定する際には、図3(A)に示したようにヨーク本体101の周壁部の内周面105に永久磁石3aないし3dを並べて配置した後、磁石固定用バネ4を、その連結部403をヨーク1の底面側に向けた状態で、隣り合う2つの永久磁石3a,3d間及び3b,3c間に挿入して、連結部403をヨーク本体101の底壁部に当接させる。   When the permanent magnets 3a to 3d are fixed to the yoke 1 using the magnet fixing spring 4 of the present embodiment, the inner peripheral surface 105 of the peripheral wall portion of the yoke body 101 is permanently attached as shown in FIG. After the magnets 3a to 3d are arranged side by side, the magnet fixing spring 4 is inserted between the two adjacent permanent magnets 3a, 3d and 3b, 3c with the connecting portion 403 facing the bottom surface of the yoke 1. Then, the connecting portion 403 is brought into contact with the bottom wall portion of the yoke body 101.

次いで、図3(B)に示したように、磁石固定用バネ4の腕部404の後端部とスペーサ機能部404aとの間の部分404bを工具6により第1及び第2の板バネ部のくびれ部401a及び402a側に押して変形させることにより、スペーサ機能部404aをくびれ部401a,402aの頂部401a1,402a1間に圧入する。これにより、第1及び第2の板バネ部401及び402を押し広げて、磁石固定用バネ4の付勢力を増大させ、永久磁石3aないし3dを固定に必要な付勢力Fで周方向に付勢して、ヨーク1の内周面105に固定する。なお、図3(A),(B)においては、ボス部2の図示が省略されている。   Next, as shown in FIG. 3 (B), the tool 404 is used to remove the first and second leaf spring portions 404b between the rear end portion of the arm portion 404 of the magnet fixing spring 4 and the spacer function portion 404a. The spacer function portion 404a is press-fitted between the top portions 401a1 and 402a1 of the constricted portions 401a and 402a by being pushed and deformed toward the constricted portions 401a and 402a. As a result, the first and second leaf springs 401 and 402 are expanded to increase the urging force of the magnet fixing spring 4, and the permanent magnets 3a to 3d are applied in the circumferential direction with the urging force F necessary for fixing. This is fixed to the inner peripheral surface 105 of the yoke 1. 3A and 3B, the illustration of the boss portion 2 is omitted.

上記のように構成すると、磁石取付け用バネ4の磁石間への挿入を軽圧入状態で行うことができるため、磁石の端面を損傷することなくバネの挿入を行うことができる。また磁石固定用バネを磁石間に挿入した後に、腕部404の後端部とスペーサ機能部との間の部分を変位させてスペーサ機能部404aを第1の板バネ部401と第2の板バネ部402との間に挿入することにより、第1の板バネ部401と第2の板バネ部402とを押し広げて、一連の磁石3aないし3dをヨークに固定するために必要な付勢力Fで付勢することができるため、磁石をヨークに確実に固定することができる。   If comprised as mentioned above, since the insertion between the magnets of the spring 4 for magnet attachment can be performed in a light press-fit state, a spring can be inserted without damaging the end surface of a magnet. In addition, after inserting the magnet fixing spring between the magnets, the portion between the rear end portion of the arm portion 404 and the spacer function portion is displaced so that the spacer function portion 404a is replaced with the first plate spring portion 401 and the second plate. The biasing force necessary for expanding the first leaf spring portion 401 and the second leaf spring portion 402 and fixing the series of magnets 3a to 3d to the yoke by inserting the spring portion 402 between them. Since it can be urged by F, the magnet can be securely fixed to the yoke.

上記の実施形態では、第1及び第2の板バネ部401及び402の双方にくびれ部を形成して、磁石固定用バネ全体がほぼ鼓形を呈するように構成したが、本発明は、磁石固定用バネを上記実施形態のような形状に形成する場合に限定されるものではない。例えば、いずれか一方の板バネ部のみにくびれ部を形成するようにしてもよい。   In the above embodiment, the constriction is formed in both the first and second leaf springs 401 and 402 so that the entire magnet fixing spring has a substantially drum shape. The present invention is not limited to the case where the fixing spring is formed in the shape as in the above embodiment. For example, the constricted portion may be formed only in one of the leaf spring portions.

図4(A),(B)は、一方の板バネ部のみにくびれ部を形成した磁石固定用バネの実施形態を示したものである。本実施形態に係わる磁石固定用バネは、平板状に形成された帯板状の第1の板バネ部401と、幅方向を第1の板バネ部401の幅方向と同方向に向けた状態で第1の板バネ部と並べて配置されて長手方向の中間部に頂部を第1の板バネ部401側に向けたV字形のくびれ部402aが形成された第2の板バネ部402と、第1及び第2の板バネ部の後端部を相互に連結している連結部403と、第2の板バネ部の先端に後端部が連接されて第1の板バネ部401側に突出して伸びる腕部404とを一体に備えている。   4A and 4B show an embodiment of a magnet fixing spring in which a constricted portion is formed only in one leaf spring portion. The magnet fixing spring according to the present embodiment includes a flat plate-like first plate spring portion 401 formed in a flat plate shape, and a state in which the width direction is directed in the same direction as the width direction of the first plate spring portion 401. And a second leaf spring portion 402 that is arranged side by side with the first leaf spring portion and has a V-shaped constricted portion 402a formed at the middle portion in the longitudinal direction with the top facing the first leaf spring portion 401 side, The connecting portion 403 that connects the rear end portions of the first and second leaf spring portions to each other, and the rear end portion is connected to the front end of the second leaf spring portion so that the first leaf spring portion 401 side is connected. The arm portion 404 that protrudes and extends is integrally provided.

また第2の板バネ部402のくびれ部402aと連結部403との間の部分の外側に後端部側磁石当接面402bが形成され、第2の板バネ部402の先端部の外側に先端部側磁石当接面402cが形成されている。この磁石固定用バネを隣り合う2つの永久磁石の間に挿入した際には、帯板状の第1の板バネ部401の外面が一方の永久磁石の周方向端面に接すると共に、第2の板バネ部402の後端部側磁石当接面402bと先端部側磁石当接面402cとが他方の永久磁石の周方向端面に接して、第2の板バネ部402のくびれ部402aの頂部402a1が第1の板バネ部401に対向した状態で配置される。   A rear end side magnet contact surface 402b is formed outside the portion between the constricted portion 402a and the connecting portion 403 of the second leaf spring portion 402, and outside the tip portion of the second leaf spring portion 402. A tip end side magnet contact surface 402c is formed. When this magnet fixing spring is inserted between two adjacent permanent magnets, the outer surface of the first plate spring portion 401 in the form of a strip plate comes into contact with the circumferential end surface of one permanent magnet, and the second The rear end side magnet contact surface 402b and the front end side magnet contact surface 402c of the leaf spring portion 402 are in contact with the circumferential end surface of the other permanent magnet, and the top of the constricted portion 402a of the second leaf spring portion 402 402a1 is arranged in a state of facing the first leaf spring portion 401.

腕部404は、くびれ部を有しない第1の板バネ部401と第2の板バネ部402のくびれ部402aの頂部402a1との間に挿入された際に両板バネ部を互いに離反させようとする方向に付勢するスペーサとして機能するスペーサ機能部404aを先端部に有して、腕部404の後端部とスペーサ機能部404aとの間の部分404bをくびれ部402a側に変位させることにより、スペーサ機能部404aを第1の板バネ部401と第2の板バネ部402のくびれ部の頂部402a1との間に挿入し得るように構成されている。   When the arm portion 404 is inserted between the first leaf spring portion 401 having no constricted portion and the top portion 402a1 of the constricted portion 402a of the second leaf spring portion 402, the two leaf spring portions are separated from each other. And having a spacer function part 404a functioning as a spacer urging in the direction to be at the tip part, and displacing a part 404b between the rear end part of the arm part 404 and the spacer function part 404a toward the constriction part 402a. Thus, the spacer function portion 404a can be inserted between the first leaf spring portion 401 and the top portion 402a1 of the constricted portion of the second leaf spring portion 402.

本実施形態においても、磁石固定用バネ4を隣り合う永久磁石相互間に挿入する前の状態では、図4(A)に示すように、スペーサ機能部404aを第1及び第2の板バネ部401及び402のくびれ部の間から離脱させた状態にしておく。磁石固定用バネを隣り合う永久磁石の間の隙間に挿入する前の状態では、図4(A)に示したように、平板状の第1の板バネ部401と第2の板バネ部のくびれ部402aの頂部402a1とが隙間を介して対向している状態にあって、第1の板バネ部401の外面と後端部側磁石当接面402bとの間の間隔及び第1の板バネ部401の外面と先端部側磁石当接面402cとの間の間隔が隣り合う永久磁石相互間の間隔(磁石固定用バネを挿入する隙間の大きさ)よりも大きい値を示すように、第1の板バネ部401の外面と後端部側磁石当接面402bとの間の間隔及び第1の板バネ部401の外面と先端部側磁石当接面402cとの間の間隔が設定されている。   Also in the present embodiment, in a state before the magnet fixing spring 4 is inserted between the adjacent permanent magnets, the spacer function portion 404a is provided with the first and second leaf spring portions as shown in FIG. The state is made to be separated from the constricted portions 401 and 402. In a state before the magnet fixing spring is inserted into the gap between the adjacent permanent magnets, as shown in FIG. 4A, the flat plate-like first leaf spring portion 401 and the second leaf spring portion are arranged. The gap between the outer surface of the first leaf spring portion 401 and the rear end side magnet contact surface 402b and the first plate in a state in which the top portion 402a1 of the constricted portion 402a faces the gap 402a1. The interval between the outer surface of the spring portion 401 and the tip end side magnet contact surface 402c is larger than the interval between adjacent permanent magnets (the size of the gap for inserting the magnet fixing spring), The distance between the outer surface of the first leaf spring portion 401 and the rear end magnet contact surface 402b and the distance between the outer surface of the first leaf spring portion 401 and the tip end magnet contact surface 402c are set. Has been.

また磁石固定用バネ4の本体部(板バネ部401及び402と連結部403とからなる部分)が発生するバネ力は、磁石固定用バネのバネ本体部を隣り合う2つの永久磁石3a,3d間及び3b,3c間に軽圧入状態で圧入することができる程度の大きさに設定されている。   Further, the spring force generated by the main body portion of the magnet fixing spring 4 (the portion consisting of the leaf spring portions 401 and 402 and the connecting portion 403) generates two permanent magnets 3a and 3d adjacent to the spring main body portion of the magnet fixing spring. It is set to such a size that it can be press-fitted in a light press-fitted state between the gaps 3b and 3c.

更に、本実施形態では、磁石固定用バネ4を隣り合う永久磁石の間に挿入した状態にしたときに、第1の板バネ部401とくびれ部402aの頂部402a1とが接した状態で配置されるように、第1の板バネ部401と後端部側磁石当接面402bとの間の間隔及び第1の板バネ部401と先端部側磁石当接面402cとの間の間隔が設定されている。   Further, in the present embodiment, when the magnet fixing spring 4 is inserted between adjacent permanent magnets, the first leaf spring portion 401 and the top portion 402a1 of the constricted portion 402a are arranged in contact with each other. As described above, the distance between the first leaf spring portion 401 and the rear end side magnet contact surface 402b and the distance between the first leaf spring portion 401 and the front end side magnet contact surface 402c are set. Has been.

また本実施形態の磁石固定用バネは、ヨーク1の内周に配置された隣り合う2つの永久磁石3a,3d間及び3b,3c間に挿入された状態で第1の板バネ部401と第2の板バネ部402のくびれ部402aの頂部との間にスペーサ機能部404aが挿入されたときに永久磁石3aないし3dをヨークに固定するために必要な付勢力を発生するように、そのバネ力とスペーサ機能部404aの厚さとが設定されている。   Further, the magnet fixing spring of this embodiment includes the first leaf spring portion 401 and the first spring portion inserted between two adjacent permanent magnets 3a, 3d and 3b, 3c arranged on the inner periphery of the yoke 1. The springs so as to generate a biasing force necessary to fix the permanent magnets 3a to 3d to the yoke when the spacer function part 404a is inserted between the top part of the constricted part 402a of the second leaf spring part 402. The force and the thickness of the spacer function part 404a are set.

本実施形態の磁石固定用バネ4を用いて永久磁石3aないし3dをヨーク1に固定する際には、ヨーク本体101の周壁部の内周面105に永久磁石3aないし3dを並べて配置した後、磁石固定用バネ4を、その連結部403をヨークの底面側に向けた状態で、隣り合う2つの永久磁石3a,3d間及び3b,3c間に挿入する。   When the permanent magnets 3a to 3d are fixed to the yoke 1 by using the magnet fixing spring 4 of the present embodiment, after the permanent magnets 3a to 3d are arranged side by side on the inner peripheral surface 105 of the peripheral wall portion of the yoke body 101, The magnet fixing spring 4 is inserted between two adjacent permanent magnets 3a, 3d and 3b, 3c with the connecting portion 403 facing the bottom surface of the yoke.

次いで、磁石固定用バネ4の腕部404の後端部とスペーサ機能部404aとの間の部分404bをバネのくびれ部402a側に押して変形させることにより、図4(B)に示すようにスペーサ機能部404aを第1の板バネ部401と第2の板バネ部のくびれ部402aの頂部402a1との間に圧入する。これにより、第1及び第2の板バネ部401及び402を押し広げて、磁石固定用バネ4の付勢力を増大させ、永久磁石3aないし3dを固定に必要な付勢力で周方向に付勢して、ヨーク1の内周面105に固定する。   Next, the portion 404b between the rear end portion of the arm portion 404 of the magnet fixing spring 4 and the spacer function portion 404a is pushed and deformed toward the constricted portion 402a of the spring, so that the spacer as shown in FIG. The functional portion 404a is press-fitted between the first leaf spring portion 401 and the top portion 402a1 of the constricted portion 402a of the second leaf spring portion. As a result, the first and second leaf spring portions 401 and 402 are expanded to increase the urging force of the magnet fixing spring 4, and the permanent magnets 3a to 3d are urged in the circumferential direction with the urging force necessary for fixing. Then, it is fixed to the inner peripheral surface 105 of the yoke 1.

上記のように構成した場合も、磁石取付け用バネ4の磁石間への挿入を軽圧入状態で行うことができるため、磁石の端面を損傷することなく磁石固定用バネの挿入を行うことができる。また磁石固定用バネを磁石間に挿入した後に、腕部404の後端部とスペーサ機能部との間の部分を変位させてスペーサ機能部404aを第1の板バネ部401と第2の板バネ部402のくびれ部の頂部402a1との間に挿入することにより、第1の板バネ部401と第2の板バネ部402とを押し広げて、一連の磁石3aないし3dをヨークに固定するために必要な付勢力で付勢することができるため、磁石をヨークに強固に固定することができる。   Also when comprised as mentioned above, since the magnet mounting spring 4 can be inserted between the magnets in a light press-fit state, the magnet fixing spring can be inserted without damaging the end face of the magnet. . In addition, after inserting the magnet fixing spring between the magnets, the portion between the rear end portion of the arm portion 404 and the spacer function portion is displaced so that the spacer function portion 404a is replaced with the first plate spring portion 401 and the second plate. By inserting it between the top part 402a1 of the constricted part of the spring part 402, the first plate spring part 401 and the second plate spring part 402 are expanded and the series of magnets 3a to 3d are fixed to the yoke. Therefore, the magnet can be firmly fixed to the yoke because it can be biased with a necessary biasing force.

図5(A)及び(B)は、本発明に係わる磁石固定用バネの更に他の実施形態を示したものである。本実施形態の磁石固定用バネは、幅方向を同方向に向けて並べて配置された第1及び第2の板バネ部401,402と、第1及び第2の板バネ部401及び402の後端部を相互に連結している連結部403と、第1及び第2の板バネ部401及び402の先端にそれぞれ後端部が連接されて第2の板バネ部402側及び第1の板バネ部401側に突出して伸びる第1の腕部404A及び第2の腕部404Bとを一体に備えている。   5A and 5B show still another embodiment of a magnet fixing spring according to the present invention. The magnet fixing spring according to the present embodiment includes first and second leaf spring portions 401 and 402 that are arranged side by side in the same width direction, and the rear of the first and second leaf spring portions 401 and 402. The rear end portion is connected to the front ends of the connecting portion 403 that connects the end portions to each other and the first and second leaf spring portions 401 and 402, respectively, and the second leaf spring portion 402 side and the first plate. A first arm portion 404A and a second arm portion 404B that protrude and extend toward the spring portion 401 are integrally provided.

図2に示した実施形態と同様に、第1及び第2の板バネ部401及び402のそれぞれの長手方向の中間部に、頂部を内側に向けたV字形の第1及び第2のくびれ部401a及び402aが形成されている。第1のくびれ部401aと連結部403との間の部分の外側及び第2のくびれ部402aと連結部403との間の部分の外側にそれぞれ第1及び第2の後端部側磁石当接面401b及び402bが形成され、第1の板バネ部401の先端部の外側及び第2の板バネ部402の先端部の外側にそれぞれ第1及び第2の先端部側磁石当接面401c及び402cが形成されている。   Similar to the embodiment shown in FIG. 2, V-shaped first and second constricted portions with apexes facing inward in the longitudinal intermediate portions of the first and second leaf spring portions 401 and 402, respectively. 401a and 402a are formed. First and second rear end side magnet contacts on the outside of the portion between the first constricted portion 401a and the connecting portion 403 and on the outside of the portion between the second constricted portion 402a and the connecting portion 403, respectively. Surfaces 401b and 402b are formed, and the first and second tip end side magnet contact surfaces 401c and the outer side of the tip end portion of the first leaf spring portion 401 and the tip end portion of the second leaf spring portion 402, respectively. 402c is formed.

図5に示した実施形態において、磁石取付け用バネの本体部の構成は図2に示した実施形態と同様であり、隣り合う2つの永久磁石の間に挿入された際に第1の後端部側磁石当接面401bと第1の先端部側磁石当接面401c及び第2の後端部側磁石当接面402bと第2の先端部側磁石当接面402cがそれぞれ隣り合う2つの永久磁石の相対する周方向端面の一方及び他方に接するとともに、第1及び第2のくびれ部の頂部401a1,402a1同士が対向した状態で配置される。   In the embodiment shown in FIG. 5, the configuration of the main body portion of the magnet mounting spring is the same as that of the embodiment shown in FIG. 2, and the first rear end when inserted between two adjacent permanent magnets. The part side magnet contact surface 401b and the first front end part side magnet contact surface 401c and the second rear end part side magnet contact surface 402b and the second front end part side magnet contact surface 402c are adjacent to each other. The permanent magnets are arranged in contact with one and the other circumferential end faces of the permanent magnet and with the top portions 401a1, 402a1 of the first and second constricted portions facing each other.

第1の腕部404A及び第2の腕部404Bがほぼ逆L字形に形成されて、第1の腕部404Aの先端部及び第2の腕部404Bの先端部にそれぞれくびれ部401a側及びくびれ部402a側に突出した平板状の第1のスペーサ機能部404Aa及び第2のスペーサ機能部404Baが形成され、第1及び第2の腕部404A及び404Bのそれぞれの後端部とスペーサ機能部との間の部分404Ab及び404Bbを変位させることにより、図5(B)に示したように第1及び第2のスペーサ機能部404A及び404Bを第1のくびれ部401aの頂部と第2のくびれ部402aの頂部との間に重ね合せた状態で挿入し得るようになっている。   The first arm portion 404A and the second arm portion 404B are formed in a substantially inverted L shape, and the constriction portion 401a side and the constriction are respectively formed at the distal end portion of the first arm portion 404A and the distal end portion of the second arm portion 404B. A flat plate-like first spacer function part 404Aa and second spacer function part 404Ba projecting to the part 402a side are formed, the rear end part of each of the first and second arm parts 404A and 404B, the spacer function part, By shifting the portions 404Ab and 404Bb between the first and second spacer function portions 404A and 404B as shown in FIG. 5B, the top portion of the first constricted portion 401a and the second constricted portion are arranged. It can be inserted in a state of being overlapped with the top of 402a.

本実施形態の磁石固定用バネ4は、第1のスペーサ機能部404Aa及び第2のスペーサ機能部404Baが、互いに重ね合わされた状態で第1及び第2の板バネ部のくびれ部の頂部401a1,402a1の間に挿入された際に、両スペーサ機能部が板バネ部401及び402を互いに離反させる方向に付勢するスペーサとして機能して、永久磁石を固定するために必要な付勢力を発生するように構成されている。   The magnet fixing spring 4 according to the present embodiment includes the first and second spacer function portions 404Aa and 404Ba, and the top portions 401a1 and the top portions 401a1 of the constricted portions of the first and second leaf spring portions. When inserted between 402 a 1, both spacer function parts function as spacers that urge the leaf spring parts 401 and 402 away from each other, and generate a biasing force required to fix the permanent magnet. It is configured as follows.

図5に示したように構成した場合にも、図2に示した実施形態または図4に示した実施形態のように構成した場合と同様の効果を得ることができる。   Even when configured as shown in FIG. 5, the same effects as those obtained when configured as in the embodiment shown in FIG. 2 or the embodiment shown in FIG. 4 can be obtained.

上記の各実施形態において、腕部の板厚が十分でなく、腕部の先端部をそのままスペーサ機能部としたのでは、スペーサ機能部の厚みが不足する場合には、腕部の先端部を折り返す等して腕部の先端部の板厚を厚くすることにより、スペーサ機能部の厚みを増大させるようにすることができる。   In each of the above embodiments, the arm thickness is not sufficient, and the tip of the arm is used as it is as a spacer function.If the spacer function is insufficient in thickness, the tip of the arm is The thickness of the spacer function portion can be increased by increasing the thickness of the tip of the arm portion by folding it back.

また上記の各実施形態では、スペーサ機能部404aが平板状に形成されていたが、スペーサ機能部404aを第1の板バネ部401と第2の板バネ部402との間に挿入した状態を確実に維持し得るようにするために、スペーサ機能部404aが第1の板バネ部401と第2の板バネ部との間から離脱しようとした際に第1の板バネ部または第2の板バネ部に係合して該スペーサ機能部が両板バネ部の間から離脱するのを阻止する係合部をスペーサ機能部の先端に設けることもできる。   In each of the above embodiments, the spacer function portion 404a is formed in a flat plate shape, but the spacer function portion 404a is inserted between the first leaf spring portion 401 and the second leaf spring portion 402. In order to ensure that the spacer function portion 404a can be reliably maintained, the first leaf spring portion or the second leaf spring portion when the spacer function portion 404a is to be detached from between the first leaf spring portion 401 and the second leaf spring portion. An engaging portion that engages with the leaf spring portion and prevents the spacer function portion from being detached from between the leaf spring portions may be provided at the tip of the spacer function portion.

図6(A),(B)は、本発明の更に他の実施形態を示したものである。本実施形態において、第1の板バネ部401及び第2の板バネ部402は、図2に示した実施形態と同様に構成されているが、本実施形態では、スペーサ機能部404aを第1の板バネ部401の頂部401aと第2の板バネ部402の頂部402aとの間に挿入したときに第1の板バネ部401のくびれ部の内面または第2の板バネ部のくびれ部の内面に係合してスペーサ機能部404aが第1の板バネ部のくびれ部の頂部と第2の板バネ部のくびれ部の頂部との間から離脱するのを阻止する係合部404a1がスペーサ機能部404aの先端に設けられている。   6A and 6B show still another embodiment of the present invention. In the present embodiment, the first leaf spring portion 401 and the second leaf spring portion 402 are configured in the same manner as in the embodiment shown in FIG. 2, but in this embodiment, the spacer function portion 404 a is a first feature. The inner surface of the constricted portion of the first leaf spring portion 401 or the constricted portion of the second leaf spring portion when inserted between the top portion 401a of the second leaf spring portion 401 and the top portion 402a of the second leaf spring portion 402. An engaging portion 404a1 that engages with the inner surface and prevents the spacer function portion 404a from being separated from between the top of the constricted portion of the first leaf spring portion and the top of the constricted portion of the second leaf spring portion is a spacer. It is provided at the tip of the functional unit 404a.

図示の例では、係合部404a1が、スペーサ機能部404aの先端をレの字形に折り返すことにより形成された折り返し部からなっていて、スペーサ機能部404aを第1の板バネ部401のくびれ部401aの頂部401a1と第2の板バネ部402のくびれ部402aの頂部402a1との間に挿入した状態で、係合部404a1がくびれ部401aの内面に係合する(引っ掛かる)ことにより、スペーサ機能部404aが第1の板バネ部401のくびれ部の頂部と第2の板バネ部402のくびれ部の頂部との間から離脱するのを阻止するようになっている。   In the illustrated example, the engaging portion 404a1 is formed of a folded portion formed by folding the tip of the spacer function portion 404a into a square shape, and the spacer function portion 404a is connected to the constricted portion of the first leaf spring portion 401. When the engaging portion 404a1 is engaged (hooked) with the inner surface of the constricted portion 401a in a state of being inserted between the apex portion 401a1 of 401a and the constricted portion 402a1 of the constricted portion 402a of the second leaf spring portion 402, the spacer function The portion 404 a is prevented from separating from between the top of the constricted portion of the first leaf spring portion 401 and the top of the constricted portion of the second leaf spring portion 402.

このように構成しておくと、腕部404がバネ性を有する場合でも、スペーサ機能部404aを、板バネ部401及び402のくびれ部の間に挿入された状態に確実に保持することができ、スペーサ機能部404aが振動などにより板バネ部401及び402のくびれ部の頂部の間から離脱するのを防ぐことができる。   With this configuration, even when the arm portion 404 has a spring property, the spacer function portion 404a can be reliably held in a state of being inserted between the constricted portions of the leaf spring portions 401 and 402. The spacer function portion 404a can be prevented from being detached from between the tops of the constricted portions of the leaf spring portions 401 and 402 due to vibration or the like.

図6に示した実施形態では、スペーサ機能部404aの先端の係合部(折り返し部)404a1をくびれ部401aの内面に係合させるようにしているが、スペーサ機能部404aの先端を図示と反対側に折り返して形成した折り返し部を係合部404a1として、該係合部404a1をくびれ部402aの内面に係合させるようしてもよい。   In the embodiment shown in FIG. 6, the engaging portion (folding portion) 404a1 at the tip of the spacer function portion 404a is engaged with the inner surface of the constricted portion 401a, but the tip of the spacer function portion 404a is opposite to the illustration. The folded portion formed by folding back to the side may be used as the engaging portion 404a1, and the engaging portion 404a1 may be engaged with the inner surface of the constricted portion 402a.

図4に示した実施形態においても、スペーサ機能部404aを第1の板バネ部401と第2の板バネ部402のくびれ部402aの頂部402a1との間に挿入したときに第2の板バネ部402のくびれ部402aの内面に係合してスペーサ機能部404aが第1の板バネ部401と第2の板バネ部402のくびれ部の頂部との間から離脱するのを阻止する係合部をスペーサ機能部の先端に設けることができる。例えば、腕部404のスペーサ機能部404aの先端をくびれ部402a側に折り返すことによりレの字形の折り返し部からなる係合部を形成して、スペーサ機能部404aを板バネ部401と板バネ部402のくびれ部402aの頂部との間に挿入した状態で、スペーサ機能部404aの先端の係合部(折り返し部)をくびれ部402aの内面に係合させるように構成することができる。   In the embodiment shown in FIG. 4 as well, the second leaf spring is obtained when the spacer function portion 404a is inserted between the first leaf spring portion 401 and the top portion 402a1 of the constricted portion 402a of the second leaf spring portion 402. Engagement with the inner surface of the constricted portion 402a of the portion 402 to prevent the spacer function portion 404a from being detached from between the first leaf spring portion 401 and the top of the constricted portion of the second leaf spring portion 402. The part can be provided at the tip of the spacer function part. For example, by engaging the tip of the spacer function part 404a of the arm part 404 toward the constriction part 402a, an engagement part made up of a letter-shaped folding part is formed, and the spacer function part 404a is made to be a leaf spring part 401 and a leaf spring part. In a state where it is inserted between the top part of the constricted part 402a of 402, the engaging part (folded part) at the tip of the spacer function part 404a can be configured to be engaged with the inner surface of the constricted part 402a.

上記の実施形態では、磁石固定用バネ4を金属板により形成するとしたが、磁石固定用バネは弾性を有する合成樹脂により形成することもできる。   In the above embodiment, the magnet fixing spring 4 is formed of a metal plate. However, the magnet fixing spring may be formed of a synthetic resin having elasticity.

上記の実施形態では、4個の永久磁石3aないし3dをヨークに取り付けているが、本発明に係わるモータにおいて、永久磁石の数は4個に限定されるものではなく、本発明は2個以上の永久磁石をヨークの内周面に固定するモータに広く適用することができる。   In the above embodiment, four permanent magnets 3a to 3d are attached to the yoke. However, in the motor according to the present invention, the number of permanent magnets is not limited to four, and the present invention includes two or more permanent magnets. The present invention can be widely applied to motors that fix the permanent magnets to the inner peripheral surface of the yoke.

上記の実施形態では、4個の永久磁石相互間に形成される4個の突き合わせ部のうち、2カ所の突き合わせ部に磁石固定用バネ4を挿入する隙間を設けているが、磁石固定用バネを挿入する隙間を1つの突き合わせ部のみに設けるようにしてもよく、複数の永久磁石の隣り合う端部の突き合わせ部のすべてに磁石固定用バネを挿入するようにしてもよい。   In the above embodiment, the gap for inserting the magnet fixing springs 4 is provided in two butted portions among the four butted portions formed between the four permanent magnets. A gap for inserting the magnet may be provided only in one butting portion, or a magnet fixing spring may be inserted in all of the butting portions at adjacent ends of the plurality of permanent magnets.

図2及び図5に示した実施形態においては、第1の板バネ部401のくびれ部の頂部401a1と第2の板バネ部402のくびれ部の頂部402a1とが相対向しているとしたが、第1の板バネ部401のくびれ部401a及び第2の板バネ部402のくびれ部402aは必ずしも頂部同士が正確に相対向した状態で設けられていなくてもよく、第1の板バネ部401のくびれ部の頂部401a1の位置と第2の板バネ部402のくびれ部の頂部402a1の位置とが板バネ部の長手方向に多少ずれていても差し支えない。   In the embodiment shown in FIGS. 2 and 5, the top 401 a 1 of the constricted portion of the first leaf spring portion 401 and the top 402 a 1 of the constricted portion of the second leaf spring portion 402 are opposed to each other. The constricted portion 401a of the first leaf spring portion 401 and the constricted portion 402a of the second leaf spring portion 402 do not necessarily have to be provided with the tops facing each other accurately. The position of the top portion 401a1 of the constricted portion 401 and the position of the top portion 402a1 of the constricted portion of the second leaf spring portion 402 may be slightly shifted in the longitudinal direction of the leaf spring portion.

上記の説明では、図2及び図5に示した実施形態において、スペーサ機能部が第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に挿入される前の状態では、磁石固定用バネを隣り合う永久磁石の間に挿入した際に、第1の板バネ部のくびれ部と第2の板バネ部のくびれ部とが接した状態になるとしたが、隣り合う永久磁石の間に挿入された磁石固定用バネの第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間にスペーサ機能部が挿入された状態で、磁石を固定するために必要な付勢力が得られるのであれば、スペーサ機能部が第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に挿入される前の状態で、隣り合う永久磁石の間に挿入された磁石固定用バネの第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に僅かな隙間が形成されていても差し支えがない。要は、隣り合う永久磁石の間に挿入された磁石固定用バネの第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間にスペーサ機能部が挿入された状態で、磁石を固定するために必要な付勢力が発生するように構成されていればよい。図4に示した実施形態においても同様である。   In the above description, in the embodiment shown in FIGS. 2 and 5, the state before the spacer function portion is inserted between the constriction portion of the first leaf spring portion and the constriction portion of the second leaf spring portion. Then, when the magnet fixing spring is inserted between adjacent permanent magnets, the constricted portion of the first leaf spring portion and the constricted portion of the second leaf spring portion are in contact with each other. The magnet is fixed in a state where the spacer function portion is inserted between the constriction portion of the first leaf spring portion and the constriction portion of the second leaf spring portion of the magnet fixing spring inserted between the permanent magnets. If the urging force required for this is obtained, the spacer function portions are adjacent to each other in a state before being inserted between the constriction portion of the first leaf spring portion and the constriction portion of the second leaf spring portion. The constriction of the first leaf spring part and the second leaf spring part of the magnet fixing spring inserted between the permanent magnets No harm be formed a slight gap between the being part. The point is that the spacer function part is inserted between the constriction part of the first leaf spring part and the constriction part of the second leaf spring part of the magnet fixing spring inserted between the adjacent permanent magnets. It is sufficient that the urging force necessary for fixing the magnet is generated. The same applies to the embodiment shown in FIG.

1 ヨーク
105 ヨークの内周面
3a〜3d 永久磁石
4 磁石固定用バネ
401 第1の板バネ部
401a くびれ部
401a1 くびれ部の頂部
401b 第1の後端部側磁石当接面
401c 第1の先端部側磁石当接面
402 第2の板バネ部
402a くびれ部
402a1 くびれ部の頂部
402b 第2の後端部側磁石当接面
402c 第2の先端部側磁石当接面
403 連結部
404 腕部
404a スペーサ機能部
404b 腕部の後端部とスペーサ機能部との間の部分
DESCRIPTION OF SYMBOLS 1 Yoke 105 Inner peripheral surface of yoke 3a-3d Permanent magnet 4 Magnet fixing spring 401 1st leaf | plate spring part 401a Constriction part 401a1 Top part of a constriction part 401b 1st rear end side magnet contact surface 401c 1st front-end | tip Part side magnet contact surface 402 Second leaf spring part 402a Neck part 402a1 Top part of neck part 402b Second rear end part magnet contact surface 402c Second tip part side magnet contact surface 403 Connection part 404 Arm part 404a Spacer function part 404b The part between the rear end part of the arm part and the spacer function part

Claims (10)

円筒面状の内周面を有するモータのヨークの内周に並べて配置された複数の円弧状の永久磁石を前記ヨークに対して固定するために前記ヨークの内周に配置された隣り合う2つの永久磁石の間に挿入されて前記複数の永久磁石を周方向に付勢する磁石固定用バネであって、
幅方向を同方向に向けて並べて配置された第1及び第2の板バネ部と、前記第1及び第2の板バネ部の後端部を相互に連結している連結部と、前記第1及び第2の板バネ部の少なくとも一方の先端に後端部が連接されて他方の板バネ部側に突出して伸びる腕部とを一体に有して、前記第1及び第2の板バネ部を前記隣り合う2つの永久磁石の相対する周方向端面に接触させた状態で両永久磁石の間に挿入されるように構成され、
前記腕部は、前記第1及び第2の板バネ部の間に挿入された際に両板バネ部を互いに離反させる方向に付勢するスペーサとして機能するスペーサ機能部を先端部に有して、前記腕部の後端部とスペーサ機能部との間の部分を変位させることにより前記スペーサ機能部を前記第1の板バネ部と前記第2の板バネ部との間に挿入し得るように構成され、
前記2つの永久磁石の間に挿入された前記第1及び第2の板バネ部の間に前記腕部の先端部のスペーサ機能部を挿入した状態にしたときに前記複数の永久磁石を前記ヨークに固定するために必要な付勢力を発生するように構成されていること、
を特徴とするモータの磁石固定用バネ。
Two adjacent arcs arranged on the inner circumference of the yoke to fix a plurality of arc-shaped permanent magnets arranged side by side on the inner circumference of the yoke of the motor having a cylindrical inner circumference. A magnet fixing spring that is inserted between permanent magnets and biases the plurality of permanent magnets in the circumferential direction,
First and second leaf spring portions arranged side by side in the same direction in the width direction, a connecting portion for connecting rear end portions of the first and second leaf spring portions, and the first The first and second leaf springs integrally have a rear end portion connected to at least one tip of the first and second leaf spring portions and projecting and extending to the other leaf spring portion side. The portion is configured to be inserted between the two permanent magnets in a state of contacting the opposing circumferential end surfaces of the two adjacent permanent magnets,
The arm portion has a spacer function portion at a tip portion that functions as a spacer that urges the two leaf spring portions in a direction to move away from each other when inserted between the first and second leaf spring portions. The spacer function portion can be inserted between the first leaf spring portion and the second leaf spring portion by displacing a portion between the rear end portion of the arm portion and the spacer function portion. Composed of
When the spacer function portion at the tip of the arm portion is inserted between the first and second leaf spring portions inserted between the two permanent magnets, the plurality of permanent magnets are moved to the yoke. Configured to generate the biasing force required to secure the
A magnet fixing spring for a motor.
円筒面状の内周面を有するモータのヨークの内周に並べて配置された複数の円弧状の永久磁石を前記ヨークに対して固定するために前記ヨークの内周に配置された隣り合う2つの永久磁石の間に挿入されて前記複数の永久磁石を周方向に付勢する磁石固定用バネであって、
幅方向を同方向に向けて並べて配置された第1及び第2の板バネ部と、前記第1及び第2の板バネ部の後端部を相互に連結している連結部と、前記第1及び第2の板バネ部の一方の先端に後端部が連接されて他方の板バネ部側に突出して伸びる腕部とを一体に備え、
前記第1及び第2の板バネ部のそれぞれの長手方向の中間部に頂部を内側に向けたV字形の第1及び第2のくびれ部が形成されて、該第1のくびれ部と前記連結部との間の部分の外側及び第2のくびれ部と前記連結部との間の部分の外側にそれぞれ第1及び第2の後端部側磁石当接面が形成され、
前記第1の板バネ部の先端部の外側及び第2の板バネ部の先端部の外側にそれぞれ第1及び第2の先端部側磁石当接面が形成されて、隣り合う2つの永久磁石の間に挿入された際に前記第1及び第2の後端部側磁石当接面と前記第1及び第2の先端部側磁石当接面とが前記隣り合う2つの永久磁石の相対する周方向端面の一方及び他方に接するように構成され、
前記腕部は、前記第1及び第2の板バネ部のくびれ部の間に挿入された際に両板バネ部を互いに離反させる方向に付勢するスペーサとして機能するスペーサ機能部を先端部に有して、前記腕部の後端部とスペーサ機能部との間の部分を変位させることにより前記スペーサ機能部を前記第1及び第2のくびれ部の間に挿入し得るように構成され、
前記2つの永久磁石の間に挿入された前記第1及び第2の板バネ部のくびれ部の間に前記腕部の先端部のスペーサ機能部を挿入した状態にしたときに前記複数の永久磁石を前記ヨークに固定するために必要な付勢力を発生するように構成されていること、
を特徴とするモータの磁石固定用バネ。
Two adjacent arcs arranged on the inner circumference of the yoke to fix a plurality of arc-shaped permanent magnets arranged side by side on the inner circumference of the yoke of the motor having a cylindrical inner circumference. A magnet fixing spring that is inserted between permanent magnets and biases the plurality of permanent magnets in the circumferential direction,
First and second leaf spring portions arranged side by side in the same direction in the width direction, a connecting portion for connecting rear end portions of the first and second leaf spring portions, and the first A rear end connected to one tip of each of the first and second leaf springs and an arm that protrudes and extends toward the other leaf spring;
V-shaped first and second constricted portions having apexes facing inward are formed at intermediate portions in the longitudinal direction of the first and second leaf spring portions, and the first constricted portion and the connection are formed. First and second rear end side magnet contact surfaces are formed on the outside of the portion between the first portion and the outer portion of the portion between the second constricted portion and the connecting portion,
Two adjacent permanent magnets having first and second tip side magnet contact surfaces formed on the outside of the tip of the first leaf spring and the tip of the second leaf spring, respectively. The first and second rear end side magnet contact surfaces and the first and second front end side magnet contact surfaces are opposed to each other between the two adjacent permanent magnets. Configured to contact one and the other of the circumferential end faces;
The arm portion has a spacer function portion at its distal end portion that functions as a spacer that urges the leaf spring portions in a direction separating them from each other when inserted between the constricted portions of the first and second leaf spring portions. And having the spacer function part inserted between the first and second constricted parts by displacing a portion between the rear end part of the arm part and the spacer function part,
The plurality of permanent magnets when the spacer function portion at the tip of the arm portion is inserted between the constricted portions of the first and second leaf spring portions inserted between the two permanent magnets. Is configured to generate a biasing force necessary for fixing the yoke to the yoke,
A magnet fixing spring for a motor.
円筒面状の内周面を有するモータのヨークの内周に並べて配置された複数の円弧状の永久磁石を前記ヨークに対して固定するために前記ヨークの内周に配置された隣り合う2つの永久磁石の間に挿入されて前記複数の永久磁石を周方向に付勢する磁石固定用バネであって、
幅方向を同方向に向けて並べて配置された第1及び第2の板バネ部と、前記第1及び第2の板バネ部の後端部を相互に連結している連結部と、前記第1及び第2の板バネ部の先端にそれぞれ後端部が連接されて第2の板バネ部側及び第1の板バネ部側に突出して伸びる第1及び第2の腕部とを一体に備え、
前記第1及び第2の板バネ部のそれぞれの長手方向の中間部に頂部を内側に向けたV字形の第1及び第2のくびれ部が形成されて、該第1のくびれ部と前記連結部との間の部分の外側及び第2のくびれ部と前記連結部との間の部分の外側にそれぞれ第1及び第2の後端部側磁石当接面が形成され、
前記第1の板バネ部の先端部の外側及び第2の板バネ部の先端部の外側にそれぞれ第1及び第2の先端部側磁石当接面が形成されて、隣り合う2つの永久磁石の間に挿入された際に前記第1の後端部側磁石当接面と前記第1の先端部側磁石当接面及び前記第2の後端部側磁石当接面と前記第2の先端部側磁石当接面がそれぞれ前記隣り合う2つの永久磁石の相対する周方向端面の一方及び他方に接するように構成され、
前記第1及び第2の腕部はそれぞれ、前記第1及び第2の板バネ部のくびれ部の間に重ね合せた状態で挿入された際に両板バネ部を互いに離反させる方向に付勢するスペーサとして機能する第1及び第2のスペーサ機能部を先端部に有して、前記第1及び第2の腕部のそれぞれの後端部とスペーサ機能部との間の部分を変位させることにより前記第1及び第2のスペーサ機能部を前記第1のくびれ部と第2のくびれ部との間に挿入し得るように構成され、
前記2つの永久磁石の間に挿入された状態で前記第1及び第2の板バネ部のくびれ部の間に前記第1及び第2のスペーサ機能部が重ね合されて挿入されたときに前記複数の永久磁石を前記ヨークに固定するために必要な付勢力を発生するように構成されていること、
を特徴とするモータの永久磁石固定用バネ。
Two adjacent arcs arranged on the inner circumference of the yoke to fix a plurality of arc-shaped permanent magnets arranged side by side on the inner circumference of the yoke of the motor having a cylindrical inner circumference. A magnet fixing spring that is inserted between permanent magnets and biases the plurality of permanent magnets in the circumferential direction,
First and second leaf spring portions arranged side by side in the same direction in the width direction, a connecting portion for connecting rear end portions of the first and second leaf spring portions, and the first The rear ends of the first and second leaf spring portions are connected to the front ends of the first and second leaf spring portions, and the first and second arm portions that protrude and extend toward the second leaf spring portion side and the first leaf spring portion side are integrated. Prepared,
V-shaped first and second constricted portions having apexes facing inward are formed at intermediate portions in the longitudinal direction of the first and second leaf spring portions, and the first constricted portion and the connection are formed. First and second rear end side magnet contact surfaces are formed on the outside of the portion between the first portion and the outer portion of the portion between the second constricted portion and the connecting portion,
Two adjacent permanent magnets having first and second tip side magnet contact surfaces formed on the outside of the tip of the first leaf spring and the tip of the second leaf spring, respectively. When inserted between the first rear end side magnet contact surface, the first front end side magnet contact surface, the second rear end side magnet contact surface, and the second The tip side magnet contact surface is configured to contact one and the other of the circumferential end surfaces facing each other of the two adjacent permanent magnets, respectively.
When the first and second arm portions are inserted in a state of being overlapped between the constricted portions of the first and second leaf spring portions, the two leaf spring portions are biased in a direction away from each other. Having first and second spacer function portions functioning as spacers at the distal end, and displacing portions between the rear end portions of the first and second arm portions and the spacer function portions. The first and second spacer function parts can be inserted between the first constriction part and the second constriction part by
When the first and second spacer function portions are overlapped and inserted between the constricted portions of the first and second leaf spring portions while being inserted between the two permanent magnets, Being configured to generate a biasing force necessary to fix a plurality of permanent magnets to the yoke;
A spring for fixing a permanent magnet of a motor.
円筒面状の内周面を有するモータのヨークの内周に並べて配置された複数の円弧状の永久磁石を前記ヨークに対して固定するために前記ヨークの内周に配置された隣り合う2つの永久磁石の間に挿入されて前記複数の永久磁石を周方向に付勢する磁石固定用バネであって、
平板状に形成された帯板状の第1の板バネ部と、幅方向を前記第1の板バネ部の幅方向と同方向に向けた状態で前記第1の板バネ部と並べて配置されて長手方向の中間部に頂部を前記第1の板バネ部側に向けたV字形のくびれ部が形成された第2の板バネ部と、前記第1及び第2の板バネ部の後端部を相互に連結している連結部と、前記第2の板バネ部の先端に後端部が連接されて前記第1の板バネ部側に突出して伸びる腕部とを一体に備え、
前記第2の板バネ部のくびれ部と前記連結部との間の部分の外側に後端部側磁石当接面が形成されるとともに、前記第2の板バネ部の先端部の外側に先端部側磁石当接面が形成されて、隣り合う2つの永久磁石の間に挿入された際に前記第1の板バネ部の外面が一方の永久磁石の周方向端面に接すると共に、前記第2の板バネ部の後端部側磁石当接面と先端部側磁石当接面とが他方の永久磁石の周方向端面に接するように構成され、
前記腕部は、前記第1の板バネ部と第2の板バネ部のくびれ部との間に挿入された際に両板バネ部を互いに離反させようとする方向に付勢するスペーサとして機能するスペーサ機能部を先端部に有して、前記腕部の後端部とスペーサ機能部との間の部分を前記くびれ部側に変位させることにより前記スペーサ機能部を前記第1の板バネ部と第2の板バネ部のくびれ部との間に挿入し得るように構成され、
前記ヨークの内周に配置された隣り合う2つの永久磁石の間に挿入された状態で前記第1の板バネ部と第2の板バネ部のくびれ部との間に前記スペーサ機能部が挿入されたときに前記複数の永久磁石を前記ヨークに固定するために必要な付勢力を発生するように構成されていること、
を特徴とするモータの磁石固定用バネ。
Two adjacent arcs arranged on the inner circumference of the yoke to fix a plurality of arc-shaped permanent magnets arranged side by side on the inner circumference of the yoke of the motor having a cylindrical inner circumference. A magnet fixing spring that is inserted between permanent magnets and biases the plurality of permanent magnets in the circumferential direction,
A strip-shaped first leaf spring portion formed in a flat plate shape and arranged side by side with the first leaf spring portion in a state in which the width direction is in the same direction as the width direction of the first leaf spring portion. A second leaf spring portion having a V-shaped constricted portion with a top portion facing the first leaf spring portion at the middle in the longitudinal direction, and rear ends of the first and second leaf spring portions A connecting part that connects the parts to each other, and an arm part that has a rear end connected to the tip of the second leaf spring part and protrudes and extends toward the first leaf spring part.
A rear end side magnet contact surface is formed outside the portion between the constricted portion of the second leaf spring portion and the connecting portion, and the tip is located outside the tip portion of the second leaf spring portion. When the part side magnet contact surface is formed and inserted between two adjacent permanent magnets, the outer surface of the first leaf spring part contacts the circumferential end surface of one permanent magnet, and the second The leaf spring portion rear end side magnet contact surface and the tip end side magnet contact surface are configured to contact the circumferential end surface of the other permanent magnet,
The arm portion functions as a spacer that urges the two leaf spring portions in a direction to move them apart from each other when inserted between the first leaf spring portion and the constriction portion of the second leaf spring portion. A spacer function part at the tip part, and by displacing the part between the rear end part of the arm part and the spacer function part toward the constriction part side, the spacer function part is moved to the first leaf spring part. And a constriction part of the second leaf spring part so that it can be inserted,
The spacer function portion is inserted between the first leaf spring portion and the constriction portion of the second leaf spring portion while being inserted between two adjacent permanent magnets disposed on the inner periphery of the yoke. Configured to generate a biasing force necessary to fix the plurality of permanent magnets to the yoke when
A magnet fixing spring for a motor.
前記スペーサ機能部を前記第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に挿入したときに前記第1の板バネ部のくびれ部の内面または第2の板バネ部のくびれ部の内面に係合して前記スペーサ機能部が前記第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間から離脱するのを阻止する係合部が前記スペーサ機能部の先端に設けられている請求項2に記載のモータの磁石固定用バネ。   When the spacer function part is inserted between the constriction part of the first leaf spring part and the constriction part of the second leaf spring part, the inner surface or the second plate of the constriction part of the first leaf spring part An engaging portion that engages with the inner surface of the constricted portion of the spring portion and prevents the spacer function portion from being separated from between the constricted portion of the first leaf spring portion and the constricted portion of the second leaf spring portion. The magnet fixing spring for a motor according to claim 2, wherein is provided at a tip of the spacer function part. 前記スペーサ機能部を前記第1の板バネ部と第2の板バネ部のくびれ部との間に挿入したときに前記第2の板バネ部のくびれ部の内面に係合して前記スペーサ機能部が前記第1の板バネ部と第2の板バネ部のくびれ部との間から離脱するのを阻止する係合部が前記スペーサ機能部の先端に設けられている請求項4に記載のモータの磁石固定用バネ。   When the spacer function portion is inserted between the first leaf spring portion and the constriction portion of the second leaf spring portion, the spacer function portion is engaged with the inner surface of the constriction portion of the second leaf spring portion. The engagement part which prevents a part from detaching | leave from between the constriction part of a said 1st leaf | plate spring part and a 2nd leaf | plate spring part is provided in the front-end | tip of the said spacer function part. Spring for fixing the magnet of the motor. 円筒面状の内周面を有するヨークと、周方向に並べた状態で前記ヨークの内周に配置された複数の円弧状の永久磁石と、隣り合わせに配置された2つの永久磁石の周方向端面の間に挿入された磁石固定用バネとを備えて、該磁石固定用バネにより前記複数の永久磁石が周方向に付勢された状態で前記ヨークに対して固定されているモータにおいて、
前記磁石固定用バネとして、請求項1に記載された磁石固定用バネが用いられて、隣り合う永久磁石の間に該磁石固定用バネが挿入され、
前記隣り合う永久磁石の間に挿入された磁石固定用バネの第1及び第2の板バネ部の間に前記腕部の先端部のスペーサ機能部が挿入されて前記複数の永久磁石が前記ヨークに対して固定されていること、
を特徴とするモータ。
A yoke having a cylindrical inner circumferential surface, a plurality of arc-shaped permanent magnets arranged on the inner circumference of the yoke in a state of being arranged in the circumferential direction, and circumferential end surfaces of two permanent magnets arranged next to each other A magnet fixing spring inserted between the plurality of permanent magnets, wherein the plurality of permanent magnets are fixed to the yoke while being biased in the circumferential direction by the magnet fixing spring.
As the magnet fixing spring, the magnet fixing spring described in claim 1 is used, and the magnet fixing spring is inserted between adjacent permanent magnets,
A spacer function portion at the tip of the arm portion is inserted between the first and second leaf spring portions of the magnet fixing spring inserted between the adjacent permanent magnets, and the plurality of permanent magnets are connected to the yoke. Being fixed against,
A motor characterized by
円筒面状の内周面を有するヨークと、周方向に並べた状態で前記ヨークの内周に配置された複数の円弧状の永久磁石と、隣り合わせに配置された2つの永久磁石の周方向端面の間に挿入された磁石固定用バネとを備えて、該磁石固定用バネにより前記複数の永久磁石が周方向に付勢された状態で前記ヨークに対して固定されているモータにおいて、
前記磁石固定用バネとして、請求項2に記載された磁石固定用バネが用いられて、隣り合う永久磁石の間に該磁石固定用バネが挿入され、
前記磁石固定用バネの第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に前記腕部の先端部のスペーサ機能部が挿入されて前記複数の永久磁石が前記ヨークに対して固定されていること、
を特徴とするモータ。
A yoke having a cylindrical inner circumferential surface, a plurality of arc-shaped permanent magnets arranged on the inner circumference of the yoke in a state of being arranged in the circumferential direction, and circumferential end surfaces of two permanent magnets arranged next to each other A magnet fixing spring inserted between the plurality of permanent magnets, wherein the plurality of permanent magnets are fixed to the yoke while being biased in the circumferential direction by the magnet fixing spring.
As the magnet fixing spring, the magnet fixing spring described in claim 2 is used, and the magnet fixing spring is inserted between adjacent permanent magnets,
A spacer function portion at the tip of the arm portion is inserted between the constriction portion of the first leaf spring portion and the constriction portion of the second leaf spring portion of the magnet fixing spring, and the plurality of permanent magnets are Being fixed to the yoke,
A motor characterized by
円筒面状の内周面を有するヨークと、周方向に並べた状態で前記ヨークの内周に配置された複数の円弧状の永久磁石と、隣り合わせに配置された2つの永久磁石の周方向端面の間に挿入された磁石固定用バネとを備えて、該磁石固定用バネにより前記複数の永久磁石が周方向に付勢された状態で前記ヨークに対して固定されているモータにおいて、
前記磁石固定用バネとして、請求項3に記載された磁石固定用バネが用いられて、隣り合う永久磁石の間に該磁石固定用バネが挿入され、
前記磁石固定用バネの第1の板バネ部のくびれ部と第2の板バネ部のくびれ部との間に前記第1及び第2の腕部にそれぞれ形成された第1及び第2のスペーサ機能部が重ね合せた状態で挿入されて前記複数の永久磁石が前記ヨークに対して固定されていること、
を特徴とするモータ。
A yoke having a cylindrical inner circumferential surface, a plurality of arc-shaped permanent magnets arranged on the inner circumference of the yoke in a state of being arranged in the circumferential direction, and circumferential end surfaces of two permanent magnets arranged next to each other A magnet fixing spring inserted between the plurality of permanent magnets, wherein the plurality of permanent magnets are fixed to the yoke while being biased in the circumferential direction by the magnet fixing spring.
The magnet fixing spring described in claim 3 is used as the magnet fixing spring, and the magnet fixing spring is inserted between adjacent permanent magnets.
First and second spacers formed on the first and second arm portions, respectively, between the constriction portion of the first leaf spring portion and the constriction portion of the second leaf spring portion of the magnet fixing spring. The plurality of permanent magnets are fixed with respect to the yoke by being inserted in a state where the functional parts are overlapped,
A motor characterized by
円筒面状の内周面を有するヨークと、周方向に並べた状態で前記ヨークの内周に配置された複数の円弧状の永久磁石と、隣り合わせに配置された2つの永久磁石の周方向端面の間に挿入された磁石固定用バネとを備えて、該磁石固定用バネにより前記複数の永久磁石が周方向に付勢された状態で前記ヨークに対して固定されているモータにおいて、
前記磁石固定用バネとして、請求項4に記載された磁石固定用バネが用いられて、隣り合う永久磁石の間に該磁石固定用バネが挿入され、
前記磁石固定用バネの第1の板バネ部と第2の板バネ部のくびれ部との間に前記腕部のスペーサ機能部が挿入されて前記複数の永久磁石が前記ヨークに対して固定されていること、
を特徴とするモータ。
A yoke having a cylindrical inner circumferential surface, a plurality of arc-shaped permanent magnets arranged on the inner circumference of the yoke in a state of being arranged in the circumferential direction, and circumferential end surfaces of two permanent magnets arranged next to each other A magnet fixing spring inserted between the plurality of permanent magnets, wherein the plurality of permanent magnets are fixed to the yoke while being biased in the circumferential direction by the magnet fixing spring.
As the magnet fixing spring, the magnet fixing spring described in claim 4 is used, and the magnet fixing spring is inserted between adjacent permanent magnets,
A spacer function portion of the arm portion is inserted between a first leaf spring portion and a second leaf spring portion of the magnet fixing spring to fix the plurality of permanent magnets to the yoke. That
A motor characterized by
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