DE7525298U - PHOTOGRAPHIC CAMERA WITH A PIEZOELECTRIC CRYSTAL AND THIS STRIKER - Google Patents

Description

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AGPA-GEVAERT A ^ TIENGESELLSCHAPT · August 7th, 1975

! 10-Eh-ro

Leverkusen !

PP 860 / MP 1371

Photographic camera with a piezoelectric crystal and a slap song that acts on this "

The invention relates to a photographic camera with a striker arranged in the camera housing through which at least! a piezoelectric crystal to generate it a high-voltage ignition pulse for a flash lamp arrangement for igniting the latter can be acted upon is. Cameras of this type are already known. The invention is now based on the object of the vibrations Camera through the impact of the striking link on the piezoelectric To keep crystal as small as possible or to avoid it.

To solve this problem it is proposed that the piezoelectric Crystal or the piezoelectric crystals are arranged in a structural unit and that the structural unit is mounted swinging in the camera housing. According to one embodiment it is provided that the structural unit

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mounted rotatably about a fixed axis and with a flap in a slight movement permitting, housing-fixed recess is guided and with another arm on a camera-fixed, elastic Attenuator rests. Effects on the camera housing by the striking link and structural unit can be avoided reduce when the impact member is rotatably mounted about the same axis as the assembly and a drive spring is braced for the striker between the striker and the structural unit.

In order to avoid any impact in the absence of flashlights, it is advantageous that the camera trigger, the impact link and shutter release are arranged such that when the camera release is actuated, the striking member and this de ^ L shutter release releases ^ and that a locking member is provided is that the impact link via a slide depending on a flash lamp inserted in a socket releases for complete expiry and is arranged in the run-off path of the striking link in the absence of a flash lamp, that this only releases the shutter release when the trigger is actuated and then wiede before reaching the assembly is locked against movement.

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-3-PP 860 / MF 1371

The invention is explained in more detail with reference to drawings. Figures 1 and 2 show perspective representations of parts of two embodiments according to the invention.

Of a photographic camera, the shutter plate 1 with the shutter passage opening 2, a trigger 3 and a cocking slide 31 as well as the parts interacting therewith are shown. The camera has a structural unit with at least one piezoelectric crystal 5, which is held in the structural unit 4 by means of an insulating body 8, possibly together with two anvils 6 and 7. If the anvil 6 is subjected to appropriate energy, a voltage is generated in the piezoelectric crystal, which voltage is fed to a suitable flash lamp, also not shown, to ignite it via a line not shown in FIG.

In order to avoid that the ignition strike on the anvil If excessive vibrations are transmitted to the camera and / or its other parts, the structural unit 4 is suspended swinging on the locking plate 1. She knows

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PF 860 / M? 1371

this has two lever arms 4a and 4b. The lever arm 4b can be rotated together with the entire structural unit 4 about the axis 9 mounted in the locking plate 1, an angled tab 4c engaging in a recess 1a of the locking plate 1, which allows the structural unit 4 to fluctuate only slightly. The lever arm 4a is angled and rests with an angled part on an elastic damping member 10 fastened to the board 1. If the anvil 6 is hit in the direction of arrow 11, on the one hand the ignition voltage arises in the piezoelectric crystal 5 'while on the other hand the excess impact energy is used up by a slight resilient movement of the assembly 4 in a clockwise direction and thus hardly or not at all on the circuit board 1 and the rest of the camera is transmitted.

The impact member 12, which is used to act on the anvil 6, is also rotatable about the axis 9 and a Spring 13 and the tabs 4d, 12a braced with the lever arm 4b. It has a release tab 12b, a clamping pin 12c and a shutter release curve 12d. In the tensioned position, which is shown in the figure, lies with the

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Release lever Trigger 3 operationally related

in the direction of rotation of the striking link 12

in front of the release tab 12b, while at the same time the Release curve 12d in the movement path of a pin 15a a shutter clamping and release member 15 is arranged is. The shutter cocking and release member 15 comprises also a dowel pin 15b and lies with a Edge 15c in front of the dowel pin 16a of a shutter opening sector 16 under the action of a spring 17, one of which is under the action of its own Spring 18 standing closing sector 19 is assigned. In the drainage path of the closing sector 19 is an inhibiting mechanism 20 for Achieving different exposure times arranged adjustable in different positions.

Wim the trigger 3 actuated in the direction of arrow 21, so the release lever 14- releases the striking member 12. This runs clockwise and sets that Shutter tensioning and release member 15 free to expire counterclockwise, so that the shutter expiry in a certain time sequence after actuation of the trigger 3 begins. Since the distance between the striking member 12 and anvil 6 is also adjusted, it also looks up

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PF 860 / MP 1371

a certain synchronized timing the impact member 12 on the anvil 6 and thereby causes the ignition of the piezoelectrically ignitable flash lamp, not shown.

After the end of the shutter along the guide rod 22 displaceable clamping slide 2M is in the direction of arrow 23

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shifted and! rotates via its clamping edges on the clamping pins 12) c and 15b all parts in their in Figure 1 shown, tense situation back.

The exemplary embodiment according to FIG. 2 corresponds to the exemplary embodiment according to FIG. 1. In FIG. 2, however, is

ignitable a socket 25 for a piezoelectric / flash lamp shown, under which a slide 26 is provided which acts on a lever 27. There is no flashlight in the socket 25 used, the slide 26 holds the lever 27 in a position in which the latter the impact member 12 only so far to Sequence after camera release releases that the shutter tensioning and release member 15 is released, the striking member 12 then, however, starts again before the ignition strike on the anvil 6. This creates unnecessary stress

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of parts 4, 4c, 10 and 12 avoided in daylight shots without a flash. If, however, a flash lamp is inserted into the fitting 25, the slide 26 is moved downwards and pivots the lever 27 in a clockwise direction completely out of the drainage path of the striking member 12.

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Claims (6)

I I I II II Il I Il II! • t · ♦ AGFA-GEVAERT AZ ^ IENGESELLSOHAJT "7 · August 1975 ^ Q-Eh-ro Leverkusen PF 860 / HF 1371 claims 1. Photographic camera with a striker arranged in the camera housing through which at least one piezoelectric Crystal for generating a high voltage i
pulse for! a flash lamp arrangement for igniting the latter can be acted upon, characterized in that the piezoelectric crystal or the piezoelectric electrical crystals (5) are arranged in a structural unit (4) and that the structural unit (4) in the camera housing (1) is mounted swinging. 2. Camera according to claim 1, characterized in that the The structural unit (4) is rotatably mounted about a fixed axis (9) and is guided with a tab (4c) in a recess (1a) which is fixed to the housing and allows slight movements and with another arm (4a) on a camera-fixed, elastic attenuator (10) rests. -9- 7525298 07/29/76 Il »» I · III «I · I« I 'I ItII ι tl | "t" "ti ι I ItIt ι ■ · Il Il I -9- PP 860 / MP 1371 3. Camera according to one of the preceding claims, characterized in that the striking member (12) is rotatable about the same axis (9) as the structural unit (4) is stored. 4. Camera after one of the preceding claims, characterized characterized in that a drive spring (13) for the Striking member; (12 between the striking member (12) and the structural unit ^ 4, 4b) is braced. 5. Camera according to one of the preceding claims, characterized in that the camera trigger (3) »impact member (12) and shutter release (15) are arranged in such a way that when the camera release (3) is actuated the Impact link (12) and this the shutter release (15) releases. 6. Camera according to claim 5 »characterized in that a locking member (27) is provided which has a Slide (26) depending on a flashlight inserted in a socket (25) the striking link (12) releases for complete expiry and in the absence of lightning -10- 7575298 07/29/76 PF 860 / MF 1371 lamp like this in the drainage path of the striking link (12) is arranged that this only releases the shutter release (15) when the trigger (3) is actuated and then before reaching unit 4> 6 is again blocked against movement. For this purpose 2 sheets of drawings 75? 5298 07/29/76