DE1044601B - Film rewinding device for photo devices, especially for interchangeable cassettes to be inserted in roll film cameras - Google Patents

Description

LIBRARY

DES OEUTSCHEfJ

PATENT OFFICE

The invention relates to a film rewinding device for photographic devices, in particular for interchangeable cassettes, which are inserted into roll film cameras, with one engaging in the core of the supply reel and from this rewind key which can be pulled out in the axial direction.

There are known rewind keys or buttons which have a drive fork engaging the film reel press when this film reel is inserted with the film capsule in the housing of the photo device is.

In the usual photo devices such. B. roll film cameras, there is sufficient under the cover plate Space to accommodate a correspondingly long warehouse in which the shaft of the rewind fork can be moved is stored so that the film spool can be inserted or removed. The storage of the actuator, for example the rotary knob with the shaft connecting the fork which engages in the film reel in the housing is generally carried out by bearing parts attached to the housing of the photo device, the allow a rotary movement and an axial displacement of this shaft. For film winding devices of this type, which are to serve as film transport at the same time, it is also known to use the actuating member, for example the actuating button, to be connected to the film transport mechanism via a fixed coupling, while the axial displaceable shaft is rotatably mounted in this actuator and its rotational movement via a Receives friction clutch from film transport.

It is also known in such film rewinders the axially displaceable rewind shaft within certain limits radially displaceable in the housing to store the photo device. This ensures the exact centering of this shaft with respect to the

saved film reel and this shaft is centered by the film reel itself. With all these well-known However, facilities for the storage of the axially displaceable rewind shaft is a considerable one Space is required that is not available when an interchangeable cassette is inserted into the camera stands. The cassette must not require any significant space for its upper and lower walls, because this would enlarge the camera beyond the tolerable level. They are also in many In some cases, additional safeguards are also desired, for example when the rear wall of the Prevent the removable cassette or the photo device from pulling out the rewind fork.

Opposite all known film rewinding devices sits in the device according to the invention the rewind key, consisting of fork and handle, axially movable in a bridge, which in turn carries a pin parallel to the axis of the unwind film rewinder

for photo devices,

especially for roll film cameras

exchangeable cassettes to be inserted

Applicant:

ADOX Kamerawerk G. mb H.,
Wiesbaden-Biebrich, Rheingaustr. 48

Hermann Ploss, Frankfurt / M.,

and Hans Hell, Wiesbaden-Freudenberg,

have been named as inventors

coil is axially displaceable and is under the influence of a spring that it in his camp and so that seeks to pull the rewind key into engagement with the supply reel. It is thereby achieved that the storage of the rewind key practically completely from the wall of the photo device is separated. This wall can therefore be made relatively thin and light. this has its particular advantages with interchangeable cartridges in roll film cameras, where the There is no space available for the rewind key in the direction of the coil axis. Through the attachment the rewind key on the axially movable bridge is also achieved that the storage of Rewinding key shaft can be very simplified because the bearing of this shaft has the axial displacement the bridge can do with. The simplification of this storage of the shaft is simplified also the light sealing of the shaft feedthrough through the wall of the photo device is essential.

In a particularly useful embodiment of the invention, the rewind fork is closed Rear wall of the photo device, in particular the interchangeable cassette, through the closed rear wall in their retracted state blocked against unintentional pulling out. With interchangeable cartridges for On roll film cameras, this offers the significant advantage that it is made impossible to get out of the camera With the cassette removed, pull the rewinder out of the cassette. Namely, this would have the consequence that the film strip lying ready for recording in such a cassette relaxes and at least the next exposure would have blurred areas. Appropriate can

80S 679/568

3 4

the blocking of the rewind fork against unwanted- Fig. 7 the rewind key system according to Fig. 1 in

tes can be pulled out by means of a locking lever, in the pulled-out state and with the opened

which engages in the pin by being pushed through the handle,

closed rear wall of the interchangeable cassette in a groove Fig. 8 the locking lever for the rewind key

of the pin is pressed in, from which the locking 5 closed cassette rear wall,

lever when opening the rear wall as a result of its pressure- Fig. 9 the locking lever according to Fig. 8 when open

spring swings out automatically. The locking lever for the cassette back wall,

the pin or the rewind fork can / thereby by Fig. 10 as a brake for the rewind key

one on the rear wall or on the locking lever or on the special spring used in an enlarged plan view,

Housing of the exchangeable cassette attached compression spring ίο Fig. 11 the spring according to FIG. 10 'in an enlarged

against the compression spring of the locking lever when closing side view.

The rear wall is locked into the groove of the pin. In the example shown, the rewinding. The device on the rear wall or on the locking lever according to the invention on a change or The compression spring attached to the housing is used as a cassette for a roll film camera. For such designed so that it can evade so far that in 15 cases the rewinding device is according to the invention If the pin is not completely retracted, it is particularly useful because of such an interchangeable rear panel is prevented. The locking cassette advantageously has particularly little space for storage lever in the space under the frame of the photo - this rewinding device is available. At the in device arranged. the embodiment shown in the drawing of the

In the case of a rewinding device for a change, the bearing bracket 48 on the one hand carries the rotary cassette it is particularly useful to put the pin in the cash rewind key 47, 44 and other frames to arrange the exchangeable cassette. Especially those stored in the frame 35 of the cassette It is also advantageous to detach the pin with the bearing guide pin 60. In the normal bridge shown in FIG to connect to ensure that this position is the handle 47 of the rewind key Pin folded over in a simple manner during the production of the light 25 and the rewind fork 44 in the engagement image device can be used. In addition, the film reel 66 is positioned in a film capsule 15. This gives the possibility of a simple manner. The locking lever 62 is at the same time in the locking groove 63 the rewind key from the housing of the photo of the pin 60 is engaged. As from Fig. 1 continues to expand the device if this should be necessary. can be seen, around the guide pin 60 the pressure

To secure the spring mounted on the pin 30 spring 61 placed, which her an abutment on a

against stress, the rewind fork can have a ring 81 which is screwed to the frame 35

have two locking lugs with which it is when it is out. With the bearing bridge 48 is the bearing 69 for

pull out of the film capsule chamber into a recess firmly connected rewind key. Between the hand

of the bearing or the guidance of the bearing of the reverse have 47 of the reverse wrench and the bearing bridge

The bobbin winder fork dips and thus a washer 82 is arranged against too far forward 35 48, so that not

take off is secured. At the same time, by rotating the handle 47, the surface of the

also ensures that the passage opening bearing bridge 48 cannot be damaged. The return

the rewind key through the cassette wall spulergaibel 44 is supported with its sleeve 83 rotatably in the

by completely pulling out the key exposed bearing 69 of the bearing bracket 48. This sleeve 83 is with

and light enters the inside of the cassette. 40 provided an internal thread 84, by means of which the

In order to support the rewind key on the shaft 78 of the handle 47 with the rewind fork 44 Bridge to give a particularly good hold can be connected. The film capsule 15 that holds the film spool 66 according to the invention, the bearing for the rewind fork contains, is as shown in FIG. 1 so one solid be connected to the bearing bridge and placed for this purpose that the film 10 is centered in the image field 24 (Fig. 5) a part of the interchangeable cassette 11, 13 is pulled up as a ring 45 on the bearing bridge. As Fig. 1 shows, is be. It is useful, for better light between the film capsule 15 and the lower wall seal, if the bearing for the rewind fork, 11 of the interchangeable cassette still has a certain amount of play raised ring on the storage bridge and the space available that allows it, also a bit oversized The outer diameter of the rewind fork is the same as failed film capsules in the interchangeable cassette to have. 50 increase.

For the braking of the rewind fork and thus As Fig. 2 shows, the bearing bracket 48 is with a for the secure tensioning of the film in the exposure gain 79 provided, the bearing bridge 48 area a spring washer can be used, which only protects against bending. The guide pin 60 is with one Represents gear of a coil spring. This means of a screw 85 on the bearing bracket 48 firmly Spring washer can, viewed in cross section, be attached in a rectangular shape 55. To the handle 47 for the rewind and be designed on its cold cuts so that the key can be folded down, it is by means of a Section is inclined to the central axis of the spring ring. Bearing shaft 75 pivotably attached to its rotating shaft 78

A possible embodiment of the invention is given. The handle 47 has in the illustrated

shown in the drawing by way of example. It shows embodiment roughly the shape of half a ring

Fig. 1 shows the entire rewind key system after 60 total. This allows it to be folded back

of the invention in section I-I of Fig. 2, rotate state with its rotary shaft 78 without her

2 shows the bearing bridge in a top view, in part, opposing any obstacles. Through this

broke, design of the handle 47, any friction

3 shows the bottom view of an interchangeable cassette with a coupling or the like on the rewind key unnecessarily. Around

Rewinding device according to the invention, 65 to the handle in the opened operating position

4, holding the interchangeable cassette with the rear wall open, it is attached to the washer 82 with two

5, the interchangeable cassette according to FIG. 4 is provided with support surfaces 77 in section.

V-V, Fig. 3 shows the arrangement of the film rewinding

6 shows the interchangeable cassette according to FIG. 5 in the partial direction according to the invention on the underside of the

cut according to VI-VI, 70 interchangeable cassette. As can be seen from this figure,

5 6

If the rewinding device is found according to the invention locking lever 62 would have to be made so thin that

on the same side of the exchangeable cassette that the operational safety would be questioned,

which also the coupling pieces 9 and 110 with the because through the film capsule 15 of the locking lever 62 in

Lock levers 6 and 7 are located. While one of its functions could be disturbed. It's over In the placed state of the interchangeable cassette, this coupling 5 is more expedient for this reason, the locking lever 62 in

'Un pieces 9 and 110 with their locks on the one to put the space under the frame 35.

End of the bottom of the camera, which is the position- To brake the rewind key is a

tion of the film transport mechanism and the magazine picture - special spring 68 provided between the rear

Corresponding to the window closure device, the rewinding fork 44 and the winding device on the bridge 48 are fixed according to the invention at the other end io brought bearing part 69 is mounted. Through this pen

the bottom of the camera below the space 21 to 68, a certain tension of the film 10 is over

Admission of the film capsule. To increase the light the frame 35 ensures and thus causes

Security is on the lower surface 5 of the exchange that the recordings made in all areas

selkassette a bead 86, which have around part of the sharpness given by the lens. the Bearing bridge 48 sets. The handle 47 is inserted in 15 Spring 68 also serves to hold the handle 47 in

locked in the folded state not to hold higher than one of its two locking positions. this happens

Bead 31 on the rear part of the cassette in such a way that the rewind fork "44 with the

page; the shaft 78 running perpendicular to the section plane I-I can be axially displaced within the bearing part 69

Line OA represents the optical axis of the changeable bearing. By lifting the handle 47 from cassette is. ^Ao her the folded position, first the rear

As can be seen from FIG. 6, below the blender winder fork 44 is opposite by a small amount

frame 35 of the cassette 11 of the bridge 48 engaging in the groove 63 against the action of the spring 68

fende locking lever 62 pivotally mounted at 96. The- pulled outwards. As the

This locking lever 62 is through the closed Kas handle 47 puts this on with its contact surfaces set back wall 13 via the tongue 64 in the groove 63 25 77 on the washer 82 and leaves the

depressed. Fig. 6 also shows the mounting of the rewind fork 44, the effect of the spring 68 fol-

The film 10 on the picture frame 35 and the film pressing, step inside again a little. Through this

plate 40 with its pressure spring 41. takes the handle 47 in the opened state

As can be seen in particular from FIGS. 8 and 9, a stable position is a. When folding the handle According to the invention, a locking lever 62 is provided, then the rewind fork 44 is somewhat again

which jumps into the groove 63 of the pin 60, pulled to the outside until the handle 47 comes with it

unintentional withdrawal of the rewind key puts its side surface on the washer 82 and

with the bridge 48, as long as the rewind fork 44, the effect of the spring

wall 13 of the interchangeable cassette is closed. This is following the 68, lets something step inside,
necessary if a film 10 is in the image field 24 of 35. As FIGS. 10 and 11 show, the spring ring 68,

Removable cassette. Namely, the back would be seen in cross-section, rectangular and on his

bobbin fork pulled out with the rear wall closed, cold cuts designed so that the cut 70 is oblique to the

then the film 10 would once its tension lies against the center axis 94 of the spring ring 68, while the

On the other hand, there would be the risk that acute-angled edges 95 of the cut surface 70 would pass through the withdrawn rewind fork 44 light is flattened in 40.

the inside of the interchangeable cassette penetrates and spoils the operation of the rewinding device after the film 10. Invention is very simple. When the rear wall 13 of the exchange should be inserted into the empty change-To avoid that a film capsule 15 is inserted when the cassette 11/13 is not completely retracted, the rewind fork 44, the rear wall 13 is opened. In the process, the cassette snaps in place and can be bent, the locking lever 4-5 locking lever 62 is released from the locking groove 63 of the pin 60. The handle 47 of the rewind key is pressed into its locking position when the handle 47 of the rewind key is pushed into its latching position when it is tilted and pulled out. With this rewind - the rear wall 13 is closed. So if you pull the key at the same time the bearing bridge 48 improper operation, the rewind fork 44 with the attached pin 60 against the pressure on the web 65 of the coil 66 of the film capsule 15 spring 61 so far out until the two locking lugs are supported , then the compression spring 64 of the rear wall 87 of the rewind fork 44 in the bearing 73 (FIG. 7) will support the locking lever 62, which hits the pin 60. Thus, the further withdrawal of the back of the closing movement of the rear wall 13 is pressed and the winder fork 44 is limited. Dodge the path for insertion until the rear wall 13 of the film capsule 15 is completely free. When the same is inserted, it is closed. In addition, in this position, the handle 47 is released so that the position of the rewind fork 44 is even possible for the rewind fork to lay on the film reel 66. If the compression spring 61 does not pull up the pin 60 with its groove 88 in the web 65 of the film reel 66 winder key when the locking position engages, the handle 47 can be rotated into the web 65 of the film reel 66 for as long Will rewind until this is done. But this is achieved in the fork 44. Except for the compression spring 64 of the 60 rule not necessary, because when pulling out the rear wall 13, a weaker compression spring 67 film strip from the film capsule 15 is already provided for the locking lever 62, which turns the locking lever of the film reel 66, so that the rewinding device opens the Rear wall 13 from groove 63 of fork 44 snaps into web 65. After the film pin 60 lifts. 10, over the frame 35 and into the teeth of the It would also be conceivable that the locking lever 62 has been placed on the film reel 17 on the bearing 69 of the rewind fork 44, the rear wall 13 of the change - acts. In such a case, the locking lever 62 would have to be closed cassette. The spring 64 of the rear can be arranged under the film capsule 15. This would wall 13 now presses against the locking lever 62. However, either an enlargement of the interchangeable locking lever 62 engages in the groove 63 of the pin 60. require cassette in relation to its height, or the 70 This is the pulling out of the pin 60 and the

Rewinding fork 44 blocked as long as the rear wall the exchangeable cassette 11 is closed.

When the film IO is unwound from the film capsule 15 and wound onto the film spool 17, can it can be rewound back into the film capsule 15 by means of the rewinding device according to the invention. For this purpose, the film transport roller 16 is uncoupled from the gear wheels 89/90. After the film 10 is complete is rewound into the film capsule 15, the film capsule 15 can be removed from the interchangeable cassette 11, be removed after «as described above, the rear wall 13 opened and the Rückpttlergabel 44 has been pulled out.

In order to give the film capsule 15 as much space as possible for insertion, the noses 87 of the rear * 5 The winder fork 44 must be completely sunk into the lower wall 11 of the interchangeable cassette when it is pulled out. For this purpose, the bearing 73 is shaped like a bowl. This bearing 73 serves as a guide for the Bearing 69 "of the rewind fork 44. It's inside so fastened in the cast housing 11 of the interchangeable cassette that the screws or rivets 74 only have to keep this camp 69.

If in the illustrated embodiment, the rewinding device according to the invention in particular is described on the basis of an interchangeable cassette for roll film cameras, it is also available for * other photo devices into consideration. In particular, it can also be used in 35mm cameras in which emphasis is placed on a very compact structure.

Claims (16)

Patent claims: 1. Film rewinding device for photo devices, especially for interchangeable cassettes used in roll film cameras are inserted with a rewind key that engages in the core of the supply reel and can be withdrawn from it in the axial direction, characterized in that the rewinding key, consisting of fork (44) and handle (47), is axially immovable in a bridge (48) sits, which in turn carries a pin (60) which is axially parallel to the axis of the supply reel (66) is displaceably mounted and is under the influence of a spring (61), which him in his camp and so that seeks to pull the rewind key into engagement with the supply reel. 2. rewinding device according to claim 1 with an interchangeable cassette, characterized in that that the rewind fork (44) with the 5 »rear wall (13) of the interchangeable cassette (11) closed the closed rear wall (13) in the retracted state against unintentional pulling out is blocked. 3. rewinding device according to claim 2, characterized in that the rewinding fork (44) is blocked against unintentional pulling out by a locking lever (62) which engages in the pin (60) by being pushed through the closed rear wall (13) of the interchangeable cassette ( U) is pressed into a groove (63) of the pin (60), from which the locking lever (62) automatically swings out when the rear wall (13) is opened due to its compression spring (67). 4. rewinding device according to claim 2 or 3, characterized in that the locking lever (62) for the pin (60) or for the rewind fork (44) by one on the rear wall (13) or on the Locking lever (62) or pressure spring attached to the housing (11) of the exchangeable cassette (11, 13) (64) against the compression spring (67) of the locking lever (62) when closing the rear wall (13) in the groove (63) of the pin (60) is engaged. 5. rewinding device according to claim 4, characterized in that the on the rear wall (13) or on the locking lever (62) or on the housing (11) attached compression spring (64) so far can prevent the rear wall (13) from bending when the pin (60) is not fully retracted will. 6. Rückspuleinrchtung according to claim 3 to 5, characterized in that the locking lever (62) is arranged in the space under the frame (35) is. 7. rewinding device according to claim 1 to 6 for an interchangeable cassette, characterized in that that the pin (60) is arranged in the frame (35) of the exchangeable cassette (11). 8. Rückspuleiitrichtung according to claim 1 to 7, characterized in that the pin (60) is detachably connected to the bearing bracket (48). 9. rewinding device according to claim 1 to 8, characterized in that a reinforcement (79) is attached to / in the bearing bracket (48). 10. rewinding device according to claim 1 to 9, characterized in that the bearing bracket (48) is designed as a deep-drawn part. 11. rewinding device according to claim 1 to 10, characterized in that the rewind fork (44) has two locking lugs (87) with which when pulled out of the film capsule space (21) in a recess (91) of the Bearing (73) or the guide of the bearing (69) of the rewind fork (44) dips and thus against it is secured against being pulled out too far. 12. rewinding device according to claim 1 to 11, characterized in that the axis (78) of the rewinding key (47) is provided with a thread (92) through which the rewinding fork (44) is connected to the key (47). 13. rewinding device according to claim 1 to 12, characterized in that the bearing (69) for the rewind fork. (44) is firmly connected to the bearing bracket (48) and that for this purpose part of the bearing bridge (48) is pulled up as a ring (71). 14. rewinding device according to claim 1 to 13, characterized in that the bearing (69) for the rewind fork (44), the raised ring (71) on the bearing bracket (48) and the outer knife of the rewind fork (44) have the same diameter. 15. rewinding device according to claim 1 to 14, characterized in that for the braking the rewind fork (44) a spring ring (68) is used, which has only one gear. Represents helical spring. 16. rewinding device according to claim 15, characterized in that the spring ring (68), im Cross-section seen, is rectangular and is designed on its cut so that the cut is oblique is designed to the central axis (94) of the spring ring (68). _____ Considered publications: German Patent Specifications No. 816190, 815296. In addition 3 sheets of drawings © aO9 679 / S68 11.58