JPH01259512A - Electromagnetic actuator - Google Patents
Electromagnetic actuatorInfo
- Publication number
- JPH01259512A JPH01259512A JP8738688A JP8738688A JPH01259512A JP H01259512 A JPH01259512 A JP H01259512A JP 8738688 A JP8738688 A JP 8738688A JP 8738688 A JP8738688 A JP 8738688A JP H01259512 A JPH01259512 A JP H01259512A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- suction
- attraction
- piece
- coil core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000696 magnetic material Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Shutters For Cameras (AREA)
- Electromagnets (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はカメラ等の精密小型機器に使用する２個の吸
着片を備えた電磁アクチエイタ−に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic actuator equipped with two suction pieces for use in small precision equipment such as cameras.
従来の電磁アクチエイタ−は、１個のコイル芯に対して
１個の吸着片を備えているから、当然のことながら、吸
着片によって操作される機器類の操作部材も１個である
。したがって、電磁アクチエイタ−を用いて複数の操作
部材を操作しようとするときは、操作部材の数だけの電
磁アクチエイタ−を必要としていた。Since a conventional electromagnetic actuator has one suction piece for one coil core, it goes without saying that there is also one operation member for equipment that is operated by the suction piece. Therefore, when attempting to operate a plurality of operating members using electromagnetic actuators, as many electromagnetic actuators as there are operating members are required.
カメラ等の小型の精密機械のように、多数の操作部材を
電磁アクチエイタ−で操作するとき、操作部材の数だけ
の電磁アクチエイタ−を装備することは、装置の小型化
を阻害する原因の１つともなる。これを解決するために
１つのコイル芯に対して２個の吸着片を配置することで
、１個の電磁マグネットで２個の操作部材を操作するこ
とが可能になり、アクチエイタ−の数を半減することも
できる。When operating a large number of operating members using electromagnetic actuators, such as in a small precision machine such as a camera, equipping as many electromagnetic actuators as there are operating members is one of the reasons that hinders miniaturization of the device. It also becomes. To solve this problem, by arranging two adsorption pieces for one coil core, it becomes possible to operate two operating members with one electromagnetic magnet, reducing the number of actuators by half. You can also.
しかしながら、１つのコイル芯に２個の吸着片を配置す
ることは、吸着片とコイル芯との間の空隙も２個存在す
ることになり、形成される磁路の磁気抵抗を増大させる
。この結果、１つのコイル芯に対して１個の吸着片を備
えた従来の電磁マグネットよりも大電力を供給しなけれ
ば操作部材の操作ができないことになる。However, arranging two attraction pieces on one coil core means that there are also two gaps between the attraction piece and the coil core, which increases the magnetic resistance of the formed magnetic path. As a result, the operation member cannot be operated unless a larger amount of power is supplied than in a conventional electromagnetic magnet that has one attraction piece for one coil core.
この発明は上記問題点を解決するため、コイルの非励磁
状態のとき、２個の吸着片のうち１個をコイル芯に当接
させて磁路上に形成される空隙を１個として作動せしめ
るようにしたものであって、磁性材からなるコイル芯と
、該コイル芯の周りに捲回されたコイルと、前記コイル
芯に平行に配置された磁性材からなるヨークと、該ヨー
クの両端−部にその一端が支持され、前記コイル芯の両
端部に対向する位置に配置され、前記コイル芯に吸着さ
れる吸着位置およびその位置から離れた離反位置の間を
移動する磁性材からなる第１及び第２の吸着片と、前記
第１の吸着片の移動により駆動される第１の操作部材と
、前記第２の吸着片の移動により駆動される第２の操作
部材と、前記コイル芯による一方の吸着片の吸引動作を
先立って他方の吸着片を吸着位置に位置させ、保持する
当接機構とを備えたことを特徴とするものである。In order to solve the above-mentioned problems, the present invention has a structure in which, when the coil is in a non-excited state, one of the two attraction pieces is brought into contact with the coil core, and the air gap formed on the magnetic path is operated as one. A coil core made of a magnetic material, a coil wound around the coil core, a yoke made of a magnetic material arranged parallel to the coil core, and both ends of the yoke. A first magnetic material is supported at one end thereof, is disposed at a position facing both ends of the coil core, and is made of a magnetic material and moves between an attraction position where the coil core is attracted and a separation position away from the attraction position. a second suction piece, a first operation member driven by movement of the first suction piece, a second operation member driven by movement of the second suction piece, and one by the coil core. The present invention is characterized by comprising a contact mechanism that positions and holds the other suction piece at a suction position prior to the suction operation of the other suction piece.
コイルが励磁されていない初期状態にあるとき、第２の
吸着片は当接機構により吸着位置に保持されている。コ
イルが励磁されると第１の吸着片はコイル芯に吸着し、
第１操作部材を第２位置に回動する。このとき、第２吸
着片はコイル芯に当接しており、磁路の空隙は１個であ
るから、第１吸着片を吸引するとき従来の１個の吸着片
を備えた電磁マグネットと同一吸引力で第１操作部材を
回動する。また、このとき、第２吸着片も吸着状態にあ
るので第２操作部材は回動を阻止されて第１位置に留ま
る。When the coil is in an initial state where it is not excited, the second attraction piece is held at the attraction position by the contact mechanism. When the coil is excited, the first attraction piece attracts the coil core,
Rotating the first operating member to the second position. At this time, the second attraction piece is in contact with the coil core, and there is only one gap in the magnetic path, so when the first attraction piece is attracted, it is the same as the conventional electromagnetic magnet with one attraction piece. The first operating member is rotated by force. Further, at this time, since the second suction piece is also in the suction state, the second operating member is prevented from rotating and remains at the first position.
コイルの励磁が解放されると第１操作部材は第１位置に
復帰し、第２操作部材は第２位置に回動する。When the excitation of the coil is released, the first operating member returns to the first position, and the second operating member rotates to the second position.
以下、この発明の実施例について説明する。 Examples of the present invention will be described below.
第１図はこの発明を実施した電磁アクチエイタ−の分解
図である。図において、１は磁性材料からなるコイル芯
、２はコイル芯であって、コイル芯１の一端には大径の
吸着部１ａが形成され、他端は細径突起１ｂ′が形成さ
れ、コイル芯１にコイル２を挿入した後、細径突起１ｂ
’に吸着部１ｂが挿入され溶接等により固定される。３
は電磁石の磁路の一部を形成するヨーク、４及び５は吸
着片であって、それぞれ下方が細く絞り込まれ、先端４
ａ。FIG. 1 is an exploded view of an electromagnetic actuator embodying the present invention. In the figure, 1 is a coil core made of magnetic material, 2 is a coil core, one end of the coil core 1 is formed with a large-diameter adsorption part 1a, the other end is formed with a small-diameter protrusion 1b', and the coil After inserting the coil 2 into the core 1, the small diameter protrusion 1b
The suction part 1b is inserted into ' and fixed by welding or the like. 3
4 is a yoke forming a part of the magnetic path of the electromagnet, and 4 and 5 are adsorption pieces, each of which is narrowed at the bottom and has a tip 4.
a.
５ａを形成している。また、吸着片４の上部には２個の
切欠４ｂが形成され、吸着片５の上部には２個の切欠５
ｂが形成され、吸着片４．５をヨーク３の端部３ｃ 、
３ｄと回動可能に係止する。5a. Furthermore, two notches 4b are formed at the top of the suction piece 4, and two notches 5 are formed at the top of the suction piece 5.
b is formed, and the suction piece 4.5 is attached to the end 3c of the yoke 3,
Rotatably locks with 3d.
６は板ばねであって、ヨーク３の上に位置し、左右の端
部には吸着片４の抜は出しを防ぐ係止部６ｅ、吸着片５
の抜は出しを防ぐ係止部６ｆが設けられ、吸着片４，５
がヨーク３に係止した状態にあるとき、板ばねの係止部
６ｅ、６ｆはそれぞれ吸着片４，５の上部に設けられた
切欠４ｄ 、 ５ｄに係合する。また、板ばね６の係止
部６ｅ、６ｆの左右にはばね片６ｃ 、 ６ｄが設けら
れ、第２図に拡大して示すように吸着片４，５の切欠４
ｂ、５ｂの上面の半分未満に当接して、吸着片４，５を
上方に力Ｆで付勢する。これにより吸着片４，５は内側
、即ちコイル芯１の吸着部１ａ、ｌｂに向う回転モーメ
ントＭを受け、吸着部１ａ、ｌｂに当接する。Reference numeral 6 denotes a leaf spring, which is located on the yoke 3, and has locking portions 6e on the left and right ends to prevent the suction piece 4 from being pulled out, and a leaf spring 6 on the suction piece 5.
A locking portion 6f is provided to prevent the suction pieces 4 and 5 from being pulled out.
When the plate springs are locked to the yoke 3, the locking portions 6e and 6f of the leaf springs engage with the notches 4d and 5d provided in the upper parts of the suction pieces 4 and 5, respectively. Further, spring pieces 6c and 6d are provided on the left and right sides of the locking parts 6e and 6f of the leaf spring 6, and as shown in an enlarged view in FIG.
The suction pieces 4 and 5 are urged upward with a force F by contacting less than half of the upper surfaces of the suction pieces b and 5b. As a result, the suction pieces 4, 5 receive a rotational moment M toward the inner side, that is, the suction parts 1a, lb of the coil core 1, and come into contact with the suction parts 1a, lb.
７はマグネットホルダーで、ヨーク取付部７ａにはビス
孔７ｂ、ボス孔７ｃが設けられ、ヨーク３及びその上に
位置する板ばね６がヨーク３に設けたボス３ｅとビス孔
３ｆに螺着するビス８によって固定される。マグネット
ホルダー７の後方は下方に向う延長部７ｄがあり、ここ
から左右にコイル芯保持部７ｅ、７’ｆが前方に延び、
その先端部にはコイル芯を保持するそれぞれ２本の指７
ｇ及び７ｈを有する開孔７乙７ｍがあり、コイル芯１の
左右の吸着板１ａ、ｌｂの内側を挟持する。マグネット
ホルダー７の延長部７ｄには、取付板９に固定するビス
孔７ｐ。7 is a magnet holder, the yoke mounting part 7a is provided with a screw hole 7b and a boss hole 7c, and the yoke 3 and the plate spring 6 located above it are screwed into the boss 3e and screw hole 3f provided on the yoke 3. It is fixed with screw 8. At the rear of the magnet holder 7, there is a downward extending portion 7d, from which coil core holding portions 7e and 7'f extend forward from left and right.
At its tip, there are two fingers 7 each that hold the coil core.
There is an opening 7 m having diameters g and 7h, which sandwich the insides of the left and right suction plates 1a and lb of the coil core 1. The extension portion 7d of the magnet holder 7 has a screw hole 7p for fixing it to the mounting plate 9.
ボス孔７ｑがあり、取付板９に設けられたボス９Ｃとビ
ス孔７ｐに螺着するビス１０で固定することができる構
成となっている。There is a boss hole 7q, and it can be fixed with a screw 10 screwed into a boss 9C provided on the mounting plate 9 and a screw hole 7p.
１１は吸着片４によって作動される第１作動レバー、１
２は吸着片５によって作動される第２作動レバーであり
、それぞれ吸着片４，５の内側に配置されている。11 is a first operating lever operated by the adsorption piece 4;
A second operating lever 2 is operated by the suction piece 5, and is arranged inside the suction pieces 4 and 5, respectively.
次に、京、イル芯の先端の吸着板１ａ 、 ｌｂの形状
について説明する。Next, the shapes of the suction plates 1a and 1b at the tip of the core will be explained.
吸着部の表面１ａ 、 ｌｂは第３図（ｂ）に示すよう
に曲率の小さなゆるやかな球面、あるいは頂角のきわめ
て大きい円錐面などからなる***面とし、その頂点Ｑを
吸着片４，５のヨーク３に対する支点Ｓからみて、コイ
ル芯の中心点より外側の位置としである。As shown in FIG. 3(b), the surfaces 1a and lb of the suction portion are raised surfaces consisting of a gentle spherical surface with a small curvature or a conical surface with an extremely large apex angle, and the apex Q thereof is the surface of the suction piece 4, 5. When viewed from the fulcrum S relative to the yoke 3, this is a position outside the center point of the coil core.
これにより、吸着片４，５が吸着部１ａ、ｌｂに吸着さ
れたとき、接触点は***面の頂点Ｑとなるから、吸着片
の支点Ｓからの距離が一定となる。また、表面がゆるや
かな球面あるいは頂角がきわめて大きい円錐面であるの
で吸着片４，５と吸着部ｌａ、ｌｂとの空隙が小さく、
磁気抵抗が小さくなる。As a result, when the suction pieces 4, 5 are attracted to the suction parts 1a, 1b, the contact point becomes the apex Q of the raised surface, so that the distance from the fulcrum S of the suction pieces becomes constant. In addition, since the surface is a gentle spherical surface or a conical surface with an extremely large apex angle, the gap between the suction pieces 4 and 5 and the suction parts la and lb is small.
Magnetic resistance becomes smaller.
第３図（ａ）は吸着部１ｂと吸着片５とが片当りして１
点Ｐで接触している状態を示し、第３図（Ｃ）は吸着部
１ｂの曲率が大きい場合を示し、いづれも空隙が大きく
、吸引力が小さくなってしまう例である。FIG. 3(a) shows that the suction part 1b and the suction piece 5 are in partial contact with each other.
A state in which they are in contact at a point P is shown, and FIG. 3(C) shows a case where the curvature of the suction portion 1b is large. In both cases, the gap is large and the suction force is small.
次に、本発明の電磁アクチエイタ−の動作につ℃・て説
明する。Next, the operation of the electromagnetic actuator of the present invention will be explained in detail.
第４図は初期状態を示すもので、コイル２には通電され
ていない。また、図面で左側の第２作動レバー１２は図
示してない本電磁アクチエイタ−を適用した装置の係止
機構により、図面に示す位置に係止され、吸着片５と接
触していないから吸着片５は吸着部１ｂに当接している
。一方、図面で右側の第１作動レバー１１は、これも図
示しない本電磁アクチエイタ−を適用した装置により時
計方向に付勢され、図面に示す位置で停止している。こ
の付勢力は板ばね６のばね片６ｃによって吸着片４に付
勢されている反時計方向の付勢力よりも太きいから、吸
着片４は吸着部１ａから離れた状態にある。FIG. 4 shows an initial state, in which the coil 2 is not energized. Further, the second actuating lever 12 on the left side in the drawing is locked at the position shown in the drawing by a locking mechanism (not shown) of a device to which this electromagnetic actuator is applied, and is not in contact with the suction piece 5. 5 is in contact with the suction portion 1b. On the other hand, the first operating lever 11 on the right side of the drawing is biased clockwise by a device to which this electromagnetic actuator is applied, which is also not shown, and is stopped at the position shown in the drawing. Since this biasing force is greater than the counterclockwise biasing force biased against the suction piece 4 by the spring piece 6c of the leaf spring 6, the suction piece 4 is in a state away from the suction portion 1a.
この状態で、コイル２に電流を流すと、コイル芯、吸着
部、吸着片、ヨークで磁路が形成され、第５図に示すよ
うに吸着バ４は吸着部１ａに吸着され、第１作動レバー
１１を反時計方向に回動する。In this state, when current is applied to the coil 2, a magnetic path is formed by the coil core, the attraction part, the attraction piece, and the yoke, and the attraction bar 4 is attracted to the attraction part 1a as shown in FIG. Rotate the lever 11 counterclockwise.
一方、吸着片５は吸着部１ｂに当接しているから変化は
ない。On the other hand, since the suction piece 5 is in contact with the suction portion 1b, there is no change.
第１作動レバー１１が反時計方向に回動すると、図示し
てない本電磁アクチエイタ−を適用した装置の係止機構
が解除されて、第６図に示すように、左側の第２作動レ
バー１２は反時計方向に回動するよう付勢される。しか
し、この時点ではコイルには通電されているから、吸着
片５は吸着部１ｂに吸着されており、第２作動レバー１
２は吸着片５に当接し、それ以上の回動を阻止される。When the first operating lever 11 rotates counterclockwise, the locking mechanism of the device to which this electromagnetic actuator (not shown) is applied is released, and the second operating lever 11 on the left side is rotated as shown in FIG. is biased to rotate counterclockwise. However, at this point, since the coil is energized, the attraction piece 5 is attracted to the attraction part 1b, and the second actuation lever 1
2 comes into contact with the suction piece 5 and is prevented from rotating further.
更に、コイル２への通電を断つと、第７図に示すように
吸着片５は開放され、第２作動レバー１２は図示しない
装置の付勢力により反時計方向に回動し、また、第１作
動レバー１１は時計方向の付勢力により回動する。Furthermore, when the current to the coil 2 is cut off, the adsorption piece 5 is released as shown in FIG. The operating lever 11 is rotated by a clockwise biasing force.
図示しない装置の係止機構が操作されることによって第
２作動レバー１２は吸着片５と当接しない位置に係止さ
れ、第４図に示す初期状態に復帰する。By operating the locking mechanism of the device (not shown), the second operating lever 12 is locked in a position where it does not come into contact with the suction piece 5, and returns to the initial state shown in FIG. 4.
第５図に示すように、左右の吸着片４，５が吸着部１ａ
、ｌｂに吸着すると磁路が閉じて磁気抵抗が減少し、磁
束密度が増大して飽和するに至る。これは無駄な電力を
消費することになるので、吸着片が吸着したことを作動
レバー１１に連動する図示してないスイッチ、あるいは
コイルに生ずる逆起電流によって検知し、コイルに流れ
る電流を減らす。第８図は、その制御回路の一例で、検
出信号をマイコンに入力し、検出信号が吸着片が吸着し
たことを示したとき、マイコンの出力ボートに接続され
たトランジスタＱｌ、 Ｑ２の一方をＯＦＦ状態として
コイル２に流れる電流を減らすものである。As shown in FIG. 5, the left and right suction pieces 4 and 5 are attached to the suction portion 1a.
, lb, the magnetic path closes, the magnetic resistance decreases, and the magnetic flux density increases, leading to saturation. Since this results in wasted power consumption, the fact that the suction piece is attracted is detected by a switch (not shown) linked to the operating lever 11 or by a back electromotive current generated in the coil, and the current flowing through the coil is reduced. Figure 8 shows an example of the control circuit, which inputs a detection signal to the microcomputer and turns off one of the transistors Ql and Q2 connected to the output port of the microcomputer when the detection signal indicates that the suction piece has been adsorbed. The state is to reduce the current flowing through the coil 2.
以上説明したように、この発明によれば１個のコイルに
対して２個の吸着片を設け、このうち第２の吸着片をコ
イル芯に当接させた状態でコイルを励磁し、第１吸着片
の吸着動作で第１操作部材を操作し、コイルの励磁を解
除したときの第２吸着片の解放で第２操作部材の操作を
おこなうから、できる。そして、電磁マグネットの磁路
上には１個の空隙のみ存在するから、磁気抵抗は１個の
吸着片を備えた従来の電磁アクチエイタ−と変らず、従
来の電磁アクチエイタ−と同一の電力で２個の操作部材
を操作することができる。As explained above, according to the present invention, two suction pieces are provided for one coil, and the coil is excited with the second suction piece in contact with the coil core, and the first This is possible because the first operation member is operated by the attraction operation of the attraction piece, and the second operation member is operated by the release of the second attraction piece when the coil is de-energized. Since there is only one air gap on the magnetic path of the electromagnet, the magnetic resistance is the same as a conventional electromagnetic actuator with one attraction piece, and with the same power as a conventional electromagnetic actuator, two can operate the operating members.
第１図は本発明に係る電磁アクチエイタ−の分解図、第
２図はヨークと吸着片の係合状態を説明する拡大断面図
、第３図はコイル芯の先端吸着部の形状説明図、第４図
乃至第７図は電磁アクチエイタ−の動作説明図、第８図
はコイルの通電制御回路図である。
１：コイル芯、ｌａ、ｌｂ ：吸着部、２：コイル、−
３＝ヨーク、４，５：吸着片、６：板ばね、７：マグネ
ットホルダー。
第２図
（ａ） （ｂ） （ｃ）
第３図
第８図Fig. 1 is an exploded view of the electromagnetic actuator according to the present invention, Fig. 2 is an enlarged sectional view illustrating the state of engagement between the yoke and the adsorption piece, Fig. 3 is an explanatory diagram of the shape of the adsorption part at the tip of the coil core, and Fig. 4 to 7 are explanatory diagrams of the operation of the electromagnetic actuator, and FIG. 8 is a diagram of a coil energization control circuit. 1: Coil core, la, lb: Adsorption part, 2: Coil, -
3 = Yoke, 4, 5: Adsorption piece, 6: Leaf spring, 7: Magnet holder. Figure 2 (a) (b) (c)
Figure 3 Figure 8
Claims (1)
れたコイルと、前記コイル芯に平行に配置された磁性材
からなるヨークと、該ヨークの両端部にその一端が支持
され、前記コイル芯の両端部に対向する位置に配置され
、前記コイル芯に吸着される吸着位置およびその位置か
ら離れた離反位置の間を移動する磁性材からなる第１及
び第２の吸着片と、前記第１の吸着片の移動により駆動
される第１の操作部材と、前記第２の吸着片の移動によ
り駆動される第２の操作部材と、前記コイル芯による一
方の吸着片の吸引動作に先立って他方の吸着片を吸着位
置に位置させ、保持する当接機構とを備えたことを特徴
とする電磁アクチエイター。a coil core made of a magnetic material, a coil wound around the coil core, a yoke made of a magnetic material arranged parallel to the coil core, one end of which is supported by both ends of the yoke; first and second attraction pieces made of a magnetic material that are disposed at positions facing both ends of the coil core and move between an attraction position where the coil core is attracted and a separation position away from the attraction position; A first operation member driven by the movement of the first attraction piece, a second operation member driven by the movement of the second attraction piece, and prior to the suction operation of one attraction piece by the coil core. An electromagnetic actuator comprising: a contact mechanism for positioning and holding the other suction piece at a suction position.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8738688A JP2512317B2 (en) | 1988-04-11 | 1988-04-11 | Electromagnetic actuator |
| US07/330,450 US5025239A (en) | 1988-04-01 | 1989-03-30 | Electromagnetic actuator for cameras and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8738688A JP2512317B2 (en) | 1988-04-11 | 1988-04-11 | Electromagnetic actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01259512A true JPH01259512A (en) | 1989-10-17 |
| JP2512317B2 JP2512317B2 (en) | 1996-07-03 |
Family
ID=13913452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8738688A Expired - Fee Related JP2512317B2 (en) | 1988-04-01 | 1988-04-11 | Electromagnetic actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2512317B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097182A (en) * | 2014-05-23 | 2015-11-25 | 三菱电机株式会社 | Electromagnet drive device |
-
1988
- 1988-04-11 JP JP8738688A patent/JP2512317B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097182A (en) * | 2014-05-23 | 2015-11-25 | 三菱电机株式会社 | Electromagnet drive device |
| WO2015177919A1 (en) * | 2014-05-23 | 2015-11-26 | 三菱電機株式会社 | Electromagnet drive device |
| JPWO2015177919A1 (en) * | 2014-05-23 | 2017-04-20 | 三菱電機株式会社 | Electromagnet drive device |
| CN105097182B (en) * | 2014-05-23 | 2018-12-14 | 三菱电机株式会社 | Electromagnet driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2512317B2 (en) | 1996-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |