ACTUATOR AND METHOD FOR MANUFACTURING ACTUATOR

To provide an actuator having constitution in which a magnetic drive mechanism revolving, around a fixed body, a movable body holding an optical element, and in which even when the movable body can be held at a predetermined position in the direction of revolving movement of the movable body around...

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Bibliographic Details
Main Authors ARAI TSUTOMU, SUE TAKESHI
Format Patent
LanguageEnglish
Japanese
Published 28.08.2023
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
GENERATION
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:To provide an actuator having constitution in which a magnetic drive mechanism revolving, around a fixed body, a movable body holding an optical element, and in which even when the movable body can be held at a predetermined position in the direction of revolving movement of the movable body around the fixed body when the drive coil of the magnetic drive mechanism is in an unpowered state, and which enables reduction of the cost of the actuator even the actuator has the aforementioned constitution.SOLUTION: In an actuator 1, a magnetic attraction force for holding a movable body 3 at a given position in the direction of rotational movement of the movable body when a drive coil 16 is an unpowered state is generated between a magnetic plate 8 which is formed in a tabular shape and a holding magnet 7. A magnetic plate arrangement hole 4e is formed in a fixed body 4, in which hole the magnetic plate 8 is arranged and fixed in place, the face of the magnetic plate arrangement hole 4e on the holding magnet 7 side constituting a contact face 4f that the magnetic plate 8 is brought into contact by the magnetic attraction force generated between the magnetic plate 8 and the holding magnet 7. A concave portion 4g which is recessed toward the holding magnet 7 side is formed in the contact face 4f.SELECTED DRAWING: Figure 2 【課題】光学要素を保持する可動体を固定体に対して回動させる磁気駆動機構を備えるアクチュエータにおいて、磁気駆動機構の駆動用コイルが非通電状態であるときに、固定体に対する可動体の回動方向において可動体を一定位置で保持することが可能であっても、コストを低減することが可能なアクチュエータを提供する。【解決手段】アクチュエータ１では、平板状に形成される磁性板８と保持用磁石７との間に、駆動用コイル１６が非通電状態であるときに可動体回動方向において可動体３を一定位置で保持するための磁気的吸引力が生じている。固定体４には、磁性板８が配置されて固定される磁性板配置穴４ｅが形成されており、磁性板配置穴４ｅの、保持用磁石７側の面は、磁性板８と保持用磁石７との間に生じる磁気的吸引力によって磁性板８が接触する接触面４ｆとなっている。接触面４ｆには、保持用磁石７側に向かって窪む凹部４ｇが形成されている。【選択図】図２
Bibliography:Application Number: JP20220021780