CN2217226Y

CN2217226Y - Structure of viewfinder of camera

Info

Publication number: CN2217226Y
Application number: CN 94239351
Authority: CN
Inventors: 许和雄
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-15
Filing date: 1994-09-15
Publication date: 1996-01-10
Anticipated expiration: 2004-09-15

Abstract

The utility model relates to a structure of a viewfinder of a camera, which is composed of a focus frame, an upper cover, an objective, a semi-penetrating reflector and an eyepiece. The objective and the semi-penetrating reflector are formed into a piece of synthetic eyeglass to shorten the length of the eyeglass of the camera and reduce the manufacturing cost in the structure, and the structure is a concave mirror in which the focus of catoptric imaging and the focus of penetrating imaging are at the same point. The synthetic eyeglass is arranged in a tabling seat positioned at the front point of the focus frame, the eyepiece is arranged in a second tabling seat positioned at the rear point of the focus frame, thereby, the visual field of shot scenery is wide for the viewfinder. The utility model has the advantages of low cost and favorable popularization.

Description

The structure of camera slide viewer

The utility model relates to a kind of structure of camera slide viewer.

The structure of traditional camera slide viewer is referring to Fig. 1, great majority are made of the eyeglass of three layers of different-thickness and pattern, wherein object lens A is used for the concavees lens of printing opacity virtual image focal length, semi-penetrate through reflective mirror B is that the light perspective rate of process special processing is 50% eyeglass, eyepiece C one has the number of degrees and plates the convex lens of square mercury frame 1, the three arrange in regular turn place in the focal length shelf before, during and after in three embedding seats 3, form a slide viewer.Because the distance of arranging between these three eyeglasses has certain ratio regulation, the basic width of camera is restricted with this always, so far do not break through yet, and semi-penetrate through reflective mirror B only is used for showing reflecting effect with its light penetration rate 50%, removing does not have other function but still processing and manufacturing individually when making in addition, not only time-consuming, take a lot of work but also take material.

The purpose of this utility model be design a kind of will former responsible virtual image focal length object lens A with have that the semi-penetrate through reflective mirror B that partly penetrates the light ability makes that a making that has the synthetic eyeglass AB of both functions simultaneously saves time, saving of labor's material-saving again, and can shorten the structure of a kind of camera slide viewer that the mirror of slide viewer grows.

Realize that main technical schemes of the present utility model is: the utility model is made up of focal length frame, loam cake, object lens, semi-penetrate through reflective mirror and eyepiece, it is characterized in that object lens and semi-penetrate through reflective mirror are synthetic eyeglasses, it is a catoptric imaging focal length and penetrates the same concavees lens on one point of imaging focal length, its front is the object lens that printing opacity virtual image focal length is arranged, its back side is the semi-penetrate through reflective mirror that 50% light perspective rate is arranged, synthetic eyeglass places in preceding place first embedding seat of focal length frame, and eyepiece places in back place second embedding seat of focal length frame.

Use slide viewer of the present utility model can see the wider visual field, be beneficial to the choice of subject angle.The making of this slide viewer has broken through prior art, has adopted behind the synthetic eyeglass mirror that has not only shortened camera long but also saved artificial and material, has reduced cost of manufacture, and the utmost point has the value of promoting the use of.

Description of drawings:

Fig. 1 is the structural drawing of existing camera slide viewer;

Fig. 2 is the three-dimensional exploded view of camera slide viewer structure of the present utility model;

Fig. 3 is the three-dimensional combination figure of camera slide viewer structure of the present utility model.

Details are as follows to structure of the present utility model below in conjunction with accompanying drawing:

Referring to Fig. 2, the utility model comprises eyepiece C, focal length frame 2, synthetic eyeglass AB, loam cake 6.Eyepiece C is the convex lens that the number of degrees arranged and be coated with square cement frame 1, also is that eyes are seen the photographed part of wanting from here.Focal length frame 2 is a rectangular awl, and its forward and backward, last three is opening surface, respectively is provided with first embedding seat 4 and second embedding seat 5 of ditch mortise shape at forward and backward place, and first embedding seat 4 at preceding place is for inserting synthetic eyeglass AB, and second embedding seat 5 at place, back is for inserting eyepiece C.Synthetic eyeglass AB is a catoptric imaging focal length and penetrates the same concavees lens on one point of imaging focal length, it will be responsible for the latter half of place of object lens A of virtual image focal length in the traditional camera slide viewer, make it have function through the mode of special processing, become a kind of special new combination with semi-penetrate through reflective mirror B.Loam cake 6 is a trapezoidal thin plate sheet, be installed in first embedding seat 4 and second embedding seat 5 of focal length frame 2 respectively when eyeglass after, again loam cake 6 is placed on the opening face up of focal length frame 2, constitute the structure of a camera slide viewer thus.

Order is referring to Fig. 2, Fig. 3 during the utility model assembling, forward and backward, top with focal length frame 2 is facing up of opening earlier, to synthesize eyeglass AB then inserts in first embedding seat 4, its eyeglass be the plane a side outwardly, a recessed side places inwardly, eyepiece C is placed in second embedding seat 5 again, eyeglass protrudes a little face outside, a side who is the plane places inwardly, loam cake 6 is covered on the opening face up of focal length frame 2 more at last, dresses up the slide viewer of a camera.

Claims

A kind of structure of camera slide viewer, form by focal length frame, loam cake, object lens, semi-penetrate through reflective mirror and eyepiece, it is characterized in that object lens and semi-penetrate through reflective mirror are synthetic eyeglasses, it is a catoptric imaging focal length and penetrates the same concavees lens on one point of imaging focal length, its front is the object lens that printing opacity virtual image focal length is arranged, there is the semi-penetrate through reflective mirror at its back side for 50% light perspective rate is arranged, and synthetic eyeglass places in preceding place first embedding seat of focal length frame, and eyepiece places in back place second embedding seat of focal length frame.