Patent ID: 9658516
Date: 2017-05-23
CPC Classifications: G03B

Claim:
1. A blade drive device comprising: a partition plate having an opening and being extensive between a base plate of the blade drive device and a support plate of the blade drive device, wherein the partition plate creates a layer of first space between the partition plate and the base plate, and a layer of second space between the partition plate and the support plate; a set of blades arranged in an overlapping matter in a thickness direction of the blade drive device and stored in one of the first and second spaces, wherein the set of blades are operable in the one of the first and second spaces to deploy to first positions where the set of blades reduces their overlapping areas among them to close the opening and retract to second positions where the set of blades increases their overlapping areas among them to open the opening, and the set of blades includes a leading blade being deployed ahead of a rest of the blades in the set; and a regulating portion integrally formed on the partition plate and positioned to come in abutment with the leading blade overrunning its first position upon arrival of the leading blade at the first position from the second position, wherein one of the base plate and the support plate is formed with a guide hole through which the regulating portion is inserted with a clearance formed between the regulating portion and an inner peripheral of the guide hole.