Multistage combined type diaphragm shutter device
An aperture shutter, composite technology, applied in the direction of shutter, optics, camera, etc., can solve the problems such as difficult fine-tuning of the aperture size of the aperture hole 703, difficult maintenance of aperture positioning accuracy, and inability to adjust the aperture size, etc., so as to achieve fast shutter switching speed and good performance. The Effect of Aperture Positioning Accuracy
Inactive Publication Date: 2009-12-23
ASIA OPTICAL CO INC
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Problems solved by technology
Like this, often can cause this aperture hole 703 to produce the problem that aperture positioning accuracy is difficult to maintain
At the same time, since the brushless motor 8 can only accurately rotate the guide rods 801 to a predetermined angle, the opening edges 701 can accurately reach the predetermined opening degree. Therefore, it is difficult to fine-tune the aperture size of the aperture hole 703. question
[0007] Furthermore, since the opening variation between the opening edges 701 is in constant linear relationship with the angle variation of the guide rods 801 rotated by the brushless motor 8 from the neutral position, therefore, the guide rods 801 When turning one degree, the variation of aperture size of the aperture hole 703 is a fixed value, and more detailed adjustment of the aperture size cannot be performed.
Method used
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[0025] Relevant detailed description and technical contents of the present invention are as follows now in conjunction with the accompanying drawings:
[0026] Such as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a preferred embodiment of the multi-stage composite aperture shutter device of the present invention includes: a base 10, an aperture shutter unit 20, an aperture adjustment ring 30, a first drive unit 40, a second drive unit 50, and An outer cover 60.
[0027] The base 10 has a first end surface 11, a second end surface 12 opposite to the first end surface 11 along an axial direction X, and an end surface extending from the first end surface 11 to the second end surface 12 along the axial direction X. The first through hole 13, a surrounding wall 14 disposed on the second end surface 12 surrounding the first through hole 13, a plurality of surrounding walls 14 extending radially outward from an outer peripheral surface of the surrounding wall 14 and ...
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A multi-stage composite aperture shutter device includes a base with a first through hole, an aperture shutter unit with two aperture shutter plates, an aperture adjustment ring, a first drive unit, and a second drive unit. The aperture adjusting ring has a through hole, a driven gear part and a cam surface. The first drive unit includes a solenoid valve with a rotating part, two second linkage parts arranged on the rotating part, and an aperture adjusting part arranged on the rotating part. The second driving unit has a motor and a driving gear meshed with the driven gear part. The aperture and shutter plates respectively have a first linkage part slidingly connected with the second linkage parts. When the aperture shutter plates move to open the aperture, the aperture adjusting part keeps in contact with the cam surface; when the aperture shutter plates move to close the aperture, the aperture adjusting part stays away from the cam surface.
Description
technical field [0001] The invention relates to a composite aperture shutter device, in particular to a multi-segment composite aperture shutter device with fast shutter switching speed and good aperture positioning accuracy. Background technique [0002] figure 1 , figure 2 Shown is an existing compound aperture shutter device for a camera (Taiwan Model Patent Application No. 89214900 disclosed). The aperture shutter device includes a base 1, a lens 2 mounted on the base 1, an aperture shutter assembly 3 pivotally mounted on the base 1, and a stepper that can drive the aperture shutter assembly 3. motor 4. The aperture shutter assembly 3 has a pivot portion 301 pivotally connected to the base 1 and formed with a plurality of gear teeth, a first aperture hole 302 with a smaller aperture, a second aperture hole 303 with a larger aperture, and A light-shielding portion 304 interposed between the first and the two aperture holes 302 , 303 . The stepping motor 4 has a driv...
Claims
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IPC IPC(8): G03B9/08
Inventor 洪朝钦陈淙泽
Owner ASIA OPTICAL CO INC