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AssigneeMinolta Co., Ltd.
InventorsHitoshi Hagimori, Yoshifumi Harada, Hiroshi Sugiyama, Haruki Yoshida, Hideki Nagata
Estimating the term…
A structure for holding lenses in which they are inserted into a lens frame in an axial direction thereof for their mounting thereon, and in which a lens that is first inserted into the lens frame is fixed thereto by caulking a part of the lens frame against the lens, so that an enlargement in a radial direction of the lens frame is prevented. The lens frame has three through-holes in a circumferential direction with an equal space therebetween in which the through-holes form around an intermediate position thereof relative to the axial direction, a stepped surface on a first end opposite a second end from which the lens is inserted, and a partial caulking projection which forms inside each hole as a part of the lens frame. After the first lens is inserted from the second end into the lens frame, the partial caulking projection is thermally caulked against a periphery, of the lens, which is downstream relative to the direction in which the lens is inserted, so that the first lens is held between the stepped surface and the partial caulking projection.
A lens holding structure comprising:
A method for assembling a lens holding structure in which a plurality of lenses are held by a lens frame thereof, in which at least a pair of the lenses are mounted on the lens frame by inserting them into the lens frame in a same axial direction of the lens frame, wherein the lens frame has a plastically deformable part which is provided generally at a central part thereof relative to the axial direction, in which the central part thereof relative thereto generally corresponds to a location of a first lens which is to be first mounted on the lens frame, and in which the plastically deformable part is exposed outside, the method comprising the steps of:
A lens holding structure comprising:
A method for determining a dimension of a lens holding structure which has:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
For lenses: using retaining rings or springs
For lenses: for more than one lens
Optical elements, systems or apparatus
Term ended 9 Apr 2018 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This application is based upon applications Nos. 9-92266 and 9-92276 filed in Japan, the contents of which are hereby incorporated by reference.
1. Field of the Invention
The present invention generally relates to a lens holding structure, a method for assembling the lens holding structure, and a method for determining a dimension of the lens holding structure, and particularly relates to the lens holding structure in which the lens is held inside a lens frame by caulking, to the assembling method by caulking, to the lens holding structure in which an optical axis of the lens and a center of the lens frame can be aligned to each other, and to the method for determining the dimension of the lens holding structure.
FIG. 1 is a sectional view showing a conventional lens holding structure;
FIG. 2 is a sectional view showing a conventional lens holding structure;
FIG. 3 is a sectional view showing a lens holding structure according to a first embodiment of the present invention;
Before the description of the present invention proceeds, it is to be noted that like or corresponding parts are designated by like reference numerals throughout the accompanying drawings.
Referring to FIGS. 3 to 12, a detailed description is made below on four embodiments of the present invention.
First, referring to FIGS. 3, 4 and 7, it is explained about a lens holding structure and its assembling method, according to a first embodiment of the present invention.