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A technology of actuators and driving devices, which is applied to the rotating parts of magnetic circuits, synchronous motors with stationary armatures and rotating magnets, apertures, etc., which can solve problems such as difficulties and high cost of actuators

Inactive Publication Date: 2002-11-20
COPAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the reduction in size of the parts, it is difficult to assemble the parts one by one by gluing or press-fitting and ensure a good product, and the cost of the actuator thus produced is of course high.

Method used

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Examples

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no. 1 example

[0032] This embodiment applies the actuator of the present invention to a shutter mechanism of a camera. First, the structure of the first embodiment will be described. In the description, it is assumed that obverse refers to the surface side and reverse refers to the rear side. figure 1 Among them, a shutter base plate 1 made of synthetic resin has an opening 1a and an arcuate groove 1b (1b is not in figure 1 but again Figure 5 indicated in). The cross-sectional view of the arcuate groove 1b can be seen figure 2 . In order to install the actuator described later, the shutter base plate 1 has many positioning holes 1c, one of which is shown in figure 2 middle. There are also two clips 1d and 1e on the surface of the shutter base plate 1, each of which is elastic. The back of the shutter base plate has three pivots 1f, 1g and 1h for mounting three shutter blades, which will be described later.

[0033] A blade clamping plate 2 having the same profile as the shutter b...

no. 2 example

[0051] The actuator of this embodiment has the same structure as that of the first embodiment except for the configuration of the rotor. Therefore, a description of the configuration of the stator is omitted. The description of the stator alone and the relative relationship between the stator and the rotor in the first embodiment are also applicable to the case of the second embodiment. Refer below Figures 6A-6D The rotor in the second embodiment will be described.

[0052] The rotor of the second embodiment includes an approximately cylindrical permanent magnet 18 and a frame body 19 integrally formed with the permanent magnet body 18 by spray casting. On the two surfaces of the permanent magnet 18 perpendicular to the center line of rotation, straight V-shaped grooves 18a and 18b passing through the center of rotation are provided, and on the circumferential surface of the permanent magnet 18, straight V-shaped grooves 18c and 18d are provided, and The V-shaped grooves 1...

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Abstract

An actuator is designed to rotate the rotor within a predetermined angular range in a direction determined by the current passed through the stator coils. The rotor includes: a columnar permanent magnet with two surfaces perpendicular to the centerline of rotation and one surface surrounding the centerline of rotation, and a frame integrally formed with the permanent magnet. The frame covers the central part of the permanent magnet and the surfaces surrounding the rotation centerline of the permanent magnet, thus providing multiple exposed surfaces. Each area of ​​the covered central part houses a shaft supported by a stator. And a component protrudes radially from the rotation center part, on which a transmission pin parallel to the rotation center line is assembled.

Description

[0001] technical field of invention [0002] The invention relates to a miniature electric current control actuator. In this actuator, when current is applied to the stator coils, a rotor with permanent magnets rotates by a predetermined angle in a direction determined by the current passing through the stator coils. Background technique [0003] A miniature current-controlled actuator, sometimes called a moving magnet motor, is known in the field of camera technology. The actuator is designed so that when current is applied to the stator coils, a rotor with permanent magnets rotates within a predetermined angular range in a direction determined by the current passing through the stator coils. Simultaneously, a drive pin is actuated with a permanent magnet and pushes the driven member. Compared with stepping motors, this actuator has the obvious advantages of low cost, small size and low energy consumption. In cameras, therefore, it is mainly used as a power source for shut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B9/02G03B9/10H02K1/27H02K21/12H02K33/00H02K33/16
CPCH02K33/16
Inventor 黑须富男武井敏明
Owner COPAL CO LTD