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Electromagnetic drive

An electromagnetically driven and driven technology, applied to electromagnets, electromagnets with armatures, circuits, etc., can solve the problem that the old solenoid device 100 cannot fully adapt to the miniaturization of lens barrels or cameras

Inactive Publication Date: 2002-09-04
OLYMPUS OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the above-mentioned solenoid device 100 needs to be arranged between the inner circumference of the lens frame 111 and the outer diameter portion of the photographic lens 112, then the outer diameter D0 of the lens frame that determines the outer diameter of the lens barrel 110 cannot be smaller than the specified size, and the old-fashioned spiral Tube device 100 does not adequately accommodate lens barrel or camera miniaturization

Method used

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Embodiment Construction

[0033] Embodiments of the present invention will be described in detail below using the drawings.

[0034] Fig. 1 is an exploded perspective view of a lens barrel according to a first embodiment of the present invention, in which an electromagnetic drive device for exposure control is assembled. figure 2 , 3 It is the A-A sectional view of Fig. 1, figure 2 Indicates that the shutter blades are closed, image 3 Indicates the shutter blade open state. Figure 4 Yes figure 2 The B-B cross-sectional view. Fig. 5 is a view of the above-mentioned electromagnetic drive device viewed from the protruding surface side of the plunger. Fig. 6 is a sectional view taken along line C-C of Fig. 5, which shows the protruding state of the plunger core. Figure 7 It is the F direction view of Fig. 6. Figure 8 It is an enlarged view of part D in FIG. 6 . Figure 9 It is an enlarged view of part E of FIG. 6 . In addition, in the following description, the turning direction is indicate...

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Abstract

The invention provides an electromagnetic driving device which can effectively utilize the layout space and contribute to the miniaturization of assembled equipment. DC solenoid device used for electromagnetic drive device for exposure control of lens barrel, has two solenoid coils clamped by yokes, and movable plunger core (movable core) is inserted freely forward and backward The hollow part of the coil. Through the magnetic circuit formed by the magnetic flux of the coil, the movable plunger-type iron core is driven to attract and protrude, and the shutter blades are opened and closed. The outer diameter of the coil can be smaller than the outer diameter of a single coil of the conventional solenoid device, which reduces the arrangement space of the solenoid device and contributes to the miniaturization of the lens barrel.

Description

technical field [0001] The invention relates to a structure of an electromagnetic driving device with a movable iron core and a solenoid. Background technique [0002] In the past, the driving source of the exposure control device of the camera used an electromagnetic drive device with a movable iron core (rod core) and a solenoid, that is, a DC solenoid plunger core (hereinafter referred to as the solenoid device) . For example, in the exposure control device of the conventional camera lens barrel shown in the sectional view of FIG. Figure 19 An old-fashioned electromagnetic control device of the structure shown in the cross-sectional view. [0003] The above-mentioned old-fashioned lens barrel 110 has a taking lens 112 supported by a lens frame 111, and an aperture portion 111a is provided behind the taking lens of the lens cabinet 111. Around the aperture portion 111a, two shutter blades 113, 114 are rotatably supported by support pins 117b, 117a. The shutter blades 1...

Claims

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Application Information

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IPC IPC(8): G03B9/10G03B9/08G03B9/26H01F5/00H01F7/06H01F7/16
Inventor 片桐护八高桥敬太
Owner OLYMPUS OPTICAL CO LTD
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