DE1942183A1 - Camera viewfinder - Google Patents

Description

DR. BERG DIPL.-ING. STAPF

8 MUNICH 2. HILBLESTRASSE 2O

Dr, mountain Dipl.-Ing. Stopf, 8 MOntfian 2, HllblastroBa 20

18 761 - _{| 9t}

Attorney's File 18 76 I.

Kabushiki Kaisha Iticoh, Tokyo / Japan

Camera viewfinder

The invention relates to a camera viewfinder and in particular a cover for a Eye level eyepiece of an eye level and brast level camera viewer.

If the eye level finder (for viewing at eye level) and chest level finder (for viewing at chest level ) is used, the chest

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ocular no light from outside in daa Oi ^ ti ^ uchersystem a. If, however, the breast throat seeker or the breast liohenocular is used, light entering the optical Juchers system from outside through the eye level eyepiece System diffusely reflected and to the chest height olcular directed thereby worsens itself the Konirast of Hildes visible through the seeker, and scattered light and reflections are created.

The invention therefore aims primarily to those described above To eliminate disadvantages in that a cover device for the eye level eyepiece is provided, by means of which the eye level ocular automatically depending on the switch from eye level eyepiece to chest height eyepiece in one Eye level and chest level finder optically shielded can be.

Briefly, the invention provides an eye level and chest level finder in which a chest level eyepiece is attached / - ... . .

is arranged. At a light outlet opening of the roof mirror assembly an eye level eyepiece is provided. A level deflecting mirror can be swiveled between the broth height eyepiece and the ßndreflexions-

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fläcije arranged so that the light object to entä iv by means of the Fo the Augenhb'henokular äachartigen ueflexionsflachen the i ^J -. 'uachspiegelanorcnung and .ündreflexionsfläche achieved when Aich egg flat deflection mirror is in its retracted position * When the. On the other hand, if the plane deflecting mirror is in its deflection position, the light arrives at the urust high ocular by means of the uacL-like reflection surfaces and the plane deflecting mirror.

In addition to a side ^{wall of the i J} enta- • Uachspiegelano relining, there is a control disk with a high control curve (the edge of the control curve is at a great distance from the control disk), a central control curve (the x * on the middle control cam is located at a medium distance from the part of the control disc and a lower control cam (the j ^ on this control cam is close to the part of the control disc). Furthermore, a pivotable cover plate is provided for optically shielding or releasing the eye level eyepiece, a lever which can be pivoted together with the flat deflecting mirror and a drive lever connected to the cover plate via a lever mechanism normally engage with the control disk. The control disk can have two or more than two each around

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a predetermined angle fromeiiiaiidei ^ lying original layers rotated i / earth so that; the flat deflecting mirror in its zuriic ^ drawn or be pivoted into its deflection position, can, the ebeneUmlenkspiegel --enn in its retracted ^ division is, the .abdeckplatte is in its optically Au.'yeinhöhenokular the releasing position, on the other hand .leim The flat deflecting mirror is in its Uralenkstteilung, the cover plate shields the AU; -; enliohenocular optically from ₀ - Therefore, when the original height eyepiece is used, the eye level eyepiece is automatically optically covered so that unwanted eyesight cannot enter the oaciiersystem the image seen through the viewfinder is always sharp and clear, and precise focusing can be carried out for better photography. . · ■ '.. "■ _ ■

In the following, the invention will be based on the drawings are explained in more detail.

Fig. 1 shows a side view of Augenhöhen- ßrusthöhensuchers and having a pre - - direction gemäi3 Krfindung has.

Fig. 2 shows a plan view of the oucher with some parts broken away.

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BAD ORlQlMAL

- ^ in Penta-iJachholilkörperspiegel 1 has ^ achreflexionsflachen la, a - ^ ndreflexioiis-mirror Ib, a Lichteiiiiaßöf f mm> - Id and a light exit opening Ic o, m ^ renaend to the light exit opening ic a ^ u '^ enliöheriokular 2 is arranged , while above the. ^ nd reflection mirror or the Lndreflexionsflache Ib a - ^ rusthöhenokular 3 is arranged. A flat deflecting mirror 4 is arranged pivotably between the eye level 3 and the reflective mirror 1b. - By operating from outside the camera, the flat deflecting mirror 4 can be moved into and out of the I-enta ^ axis mirror arrangement "1, so that the flat deflecting mirror 4 can be moved into a retracted position (indicated by the dash-dotted line in i ' ig-, 1) or . a deflection position (which is shown by the dashed line in Fig. 1) are brought, when the deflection mirror 4 is in its retracted position, the viewfinder from the focusing plane 5a of the focusing Plate 5 entering light by means of the achreflection surface la and the i ^ ndreflexionsflache Ib to the eye level eyepiece 2, and the flat deflecting mirror 4 shields the chest height eyepiece 3 so that no light can reach it flat deflection mirror 4 is in its deflection position,

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BÄDQftiQfNÄL

the light that enters the earlier reaches by means of the lJachreflexionsfleiche la unc; aera levels imlonlcs.Aegel 4 sun iirust height eyepiece 3

Trabrahmeη ό and Gn. are attached to the camera by means of their outer parts 6a or 7. baa fastened between the - "ahmen- υ and 6a extends rotatably a ... rope / which deceives the deflecting mirror 4. '^ ± e shaft 7 normally strives to be clockwise through a not shown edder (seen in Je'ir. 1), - ^ in one end of a lever 8 is attached to a 4näe of the v / elle 7, while its other ^ end carries a otift 9. x2in three-armed lever 10 is pivotable attached to the frame 6 by means of a pin 11. The lever 10 tends, by a spring (not shown), to pivot in a clockwise direction (as seen in FIG. 1). pin 12, while the front linden of a second arm 10b is forked at l'Oba «The front end of the third arm lüc is bent at lOaa , ώίηβ cam 13 with a high • control curve 10a, a middle control curve lüb and a low control curve 10c is rotatably attached to the frame 6 by means of a pin l4 and can go through a button that can be operated outside the camera can be turned. The pin 9 of the lever 8 and the pin 12 of the lever 10 are normally in engagement with the cam disk 13 if the pin 9 of the lever 8 009815/1278 BAOÖRtGJNÄL

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on the low cam l'3c of the control disc starts up, i.e. when the flat deflecting mirror 4 is in its deflecting position, the pin engages des liebels 1 »on the high, control curve 13a of the control disc Ij -u.n. ..emi on the other hand pin 9 on the high control curve 13a is applied, i.e. when the deflection mirror 4 is in its retracted position, the pin 12 can be attached to both the middle control curve IJb as well as on the low control curve 13c attack, rie pins 9 and 12 can be in your three engagement positions described above are brought, by the control disc 13 by the button 15 by one predetermined ..angle rotated wira.

On the take ο is a two-ar-r through an I'.äpfen 17 migor // wischonixebel 16 pivotally attached «From the At the free end of the one »irms lba protrudes a pen 18 and is in engagement with the forked Xeil lüba des Rebels IU. jJas free ends of the ancleren Arms 10b is through a pin 20 with a first connecting lever 19 articulated, A> 'er first connecting lever 19 has an elongated slot 19a. -> Through the lateral walls 21a of the eye level ocular age Rotatable pins 22 protrude from 21 and carry a cover plate 23. J ^ in end of a first reciprocating lever 24 is on one Pin 22 attached, both the cover plate 23 and

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Eg first levers 2 <V, which can be swiveled back and forth, normally have the sprinkling of a spring (not shown) to swivel in the direction of each clock (seen in Fig. 1). A pin 25 protrudes from the other cortex of the first pivotable back and forth lever 24, which is in engagement with the rural slit 19a of the first connecting lever, "part 26" sits rotatably in the side wall 21a and carries a light measuring element 27 and one end of a second pivotable lever 28 Articulated with the ^ r in l6b of the intermediate lever lo through the pin 20, whereby a lever linkage is created the high control curve 13a is applied, the movement of the cover plate 23 is limited by the first connecting lever 19 by means of the first reciprocating love element 24, so that the cover plate 23 in its indicated with dashed lines in Fig. 1 Abdec ketteilung is held and thereby covers the eye level eyepiece 2. At the same time there is a Lichtmeßeleraent 27 in a Lichtmeßstellung (which is indicated in Fig. Ι with dashed lines), in which it is on the focusing plane 5 » the

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BADORlQtNAL

Fokussiorim ^ üplatte 5 directed isi ;. - <enn the pin rests on the envelope control curve 13a, while the pin 12 rests on the central control curve 13b, the first / binding lever 19 is free in relation to the first lever 24 that can be pivoted back and forth, so that the -a -cover plate 23 is threatened by the eder im ^ erjenuhrseigersiiin and does not cover the ocular elevation ocular. Jas l.Ieioelemeiit 2 ^r / remains in its partial light division. .. 'hen the .-> pin 9 rests on the high control curve 13a, while the ^ tift- 12 rests on the low control curve 13d, the cover plate 23 is in its open position releasing the eye level eyepiece 2, whereas the photometric or light measuring element 27 is pivoted into a division for measuring the average brightness directed at the reflecting mirror Ib.

The control disk 13 can be turned into one of the engagement positions described above by means of the knob 15. On the other hand, if the planar deflecting mirror 4 is in its retracted position, that is, when the eye level eyepiece is used, the cover plate 23 does not cover the eye level eyepiece 2. Of course, if

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BAPORiQlNAL - 10 -

the photometric or light measurement takes place 27 in the device according to the invention is not provided, only two

of the three engagement positions described above are required. -

A load device is preferably provided, to the control disc 13 in their respective position hold and just turn the control disc 13 in Counterclockwise (seen in i'ig. 1) to allow.

The invention thus creates an outer oil eyepiece covering device for a camera in which a -urust height eyepiece is provided above a reflecting surface of a pentagonal mirror arrangement of an optical viewfinder system of a single-lens reflex camera. The eye level eyepiece is provided in the vicinity of the light exit of the penta mirror mounting. A flat deflecting mirror is provided between the chest level eyepiece and the end reflection surface. A cover plate, which can cover and release the eye level eyepiece, is arranged in front of the eye level eyepiece. The cover plate can "or release the Augenhöhenokular depending on the Urehung of the plane deflection mirror through a titeuerscheibenme mechanism and e inen lifting lme chani sinus. Opt is oh off ^ cover, so that when the BrusthÖhenokular is used, the outside light not through the The eye level eyepiece can enter the optical viewfinder system.

Claims (1)

Iy uucliersysteiii for a single-lens reflex camera with a renta -> - acuspiegelanordm.uii} -, a ^ rusthohGiiokular., Which is arranged above a ^ ndreflection surface of the i cnta-- axis ^ iegel arrangement, a -Hi. ^ Aihol.cnokulai- , which is adjacent to the Liclitaustr ittsöf f ntm ;; the * erita-j - ac.i ε υ ie ^ e lano r dnun · j ange - or> iiat, a schu'enkbar Hirisciien deia ^ rusthöhenokular and the lndreflection surface arranged flat deflecting mirror, in the withdrawn -toilung light from the i 'Oto lens of the camera in diis -i-iVioiiiiüiLenokular over ax Jachrei'lexionsilachen ηηά the -.-. Ndreflexionsflache falls and in whose deflection the light falls through the j- »rusth oular by means of the -dachref lexionsflachen and the level ünilenksjoiegels , and with a cover device for the -iugiHiIiöhenokular, characterized in that a control disk 0-3) is provided, on which the "pushbutton element (9, 12) of the lobel mechanisms (S ₁ 10, Ib, 19) engage one of which is connected to the flat deflecting mirror (4) and the other to a cover plate (23) for the eye level xiocular (2) , and that the arrangement is made in such a way that the deflecting mirror ( 4) divided into its withdrawn ^ division schv / enlct is and the cover plate (23) "in a 00 3815/127 1 9 Λ 2 1 8 3 ^ division swiveled 'is in which the --1.15011-height eyepiece (2) releases, and that with another free position of the control disc (13 ") of the deflection mirror (4) is pivoted into its deflection position and uie cover plate (23) in a position covering the eye level eyepiece (2) is ο ^ juciiersystem according to claim 1, characterized in that the cam disc (13) in addition to a eite ^ of penta- ^ ^ achspie gimbal assembly (l) and a high "-tuerkurve a medium and has a low -teuerkurve, and · the AEAL other Ilebelmechanismus (lO, l6, 19) a joined by other lever (l6, 19) with the cover plate (23) ¹ lever (LO) to V, ^T eist, an arm (lOA) cifessen norraalervreise against the control surface of the cam disk (13) S ^e ~ is pressed, and the other arm (lOb) is connected to the other levers (l6, 19) for pivoting the cover plate (23). 0098 15/127 8 _ BADOFIIGINAL ι ^Λ · »Blank page