DE102006048888A1 - Camera e.g. movie camera, for receiving image, has closing device e.g. electric motor attached to lens opening and adjusted between opened and closed positions, so that lens opening is completely closed in closed position - Google Patents

Abstract

The camera has a camera housing (10) and a removable and/or replaceable lens (12), where the camera housing has a lens opening (14). The lens is removably fastened in and/or on the lens opening. The camera housing has a closing device (22) e.g. electric motor, that is attached to the lens opening and is adjusted between opened and closed positions, so that the lens opening is completely closed in the closed position. The closing device is adjusted by loosening the lens from the camera housing in the closed position.

Description

The The invention relates to a camera according to the preamble of the claim 1. Furthermore, the invention relates to a closing device for one Camera according to the generic term of claim 24.

at many cameras, especially with most SLR cameras is the lens detachable and replaceable on the camera body attached. Thereby can with the same camera different lenses with different optical properties are used. In particular, alternately Lenses with different focal lengths and / or intensities used become. Usually Are the lenses with a threaded or bayonet lock on a lens opening on the camera body solvable attached.

At the Solve the Lens becomes the camera body open, otherwise hermetically sealed to the outside. there can Dust, moisture and dirt penetrate into the interior of the camera body. As sensitive components and components inside the camera body can be opened by opening of the camera body the functionality the camera is affected become. For example, there are sensors inside the camera body, around the lighting conditions and to record distances and from this the required exposure time, aperture and / or lens setting. A faulty measurement through the sensors thus leads to wrong recording data.

at Digital cameras, in particular, the image sensor is sensitive to dust. The dust particles on the image sensor cause that in the pictures disturbing Points or even spots appear.

Of the Invention has for its object to provide a camera, at the same time during the Changing the lenses prevents the ingress of dust into the camera body becomes.

These The object is achieved by the subject matter of claim 1.

According to the invention, it is provided that the camera body at least one closing device that has the lens opening assigned and between an open and closed state is switched or switchable, wherein when closed, the lens opening completely closed is.

Of the The core of the invention is that by the additional closing the lens opening Completely lockable is, so the camera body outward closed is. This is especially the case when the lens is changed and is currently not on the camera body. In this way it is possible that the camera body always remains closed and its interior is not exposed to external influences is. In addition to the actual shutter of the camera during the Exposure is opened, is the closing device according to the invention in Principle another closure, which always with unmounted lens closed and always open when the lens is mounted.

Preferably is provided that the closing device automatically between the opened one and closed state is switched or switchable. Thereby is guaranteed that the camera body also independent always remains closed by the behavior of the user.

For example can be provided that the closing device by releasing the Lens from the camera body in the closed to stand switched or is switchable. This leaves can be achieved with a relatively low design effort.

at the preferred embodiment it is provided that the closing device by attaching of the lens to the camera body in the opened one State is switched or switchable. This will then be the immediate functionality the camera ensures.

For example is provided that the closing device mechanically between the opened one and closed state is switched or switchable. A mechanical closing device is very reliable, because it works without a power supply.

For the concrete Embodiment may be provided that the closing device has at least one spring through which the closing device is kept in the closed state or is durable. On this way is the closing device with little design effort and thus inexpensive to produce.

Farther the closing device can at least have a mechanical element through which the closing device in the open Condition is maintained or durable. With the mechanical element can automatically by the attached lens the closing device in the open Condition are kept.

Preferably, it is provided that by the mechanical element, the closing device against the tension of the spring in the open Condition is maintained or durable. As a result, the closing device can be reliably brought back into the closed state.

alternative to the mechanical closing device can be provided that the closing device electrically between the opened one and closed state is switched or switchable. Also an electric closing device is with a low design cost and thus cost feasible.

for example can the closing device have at least one electric motor. Alternatively or additionally be provided that the closing device at least one Magnetic switch has. Also for these components, the design complexity is relatively low.

The closing may be formed, for example, as a lamellar closure. It acts It is a mature and reliable technology that has been around Generations used in cameras.

If the geometry of the camera body it allows, can the closing device identify at least one cover pivotally attached to the closing device is appropriate.

at a further embodiment has the closing device at least one cover, which is displaceable on the closing device is appropriate. This embodiment is with a flat camera body especially advantageous.

There is also the possibility, that the cover is designed as a blind. This is a special one space-saving embodiment.

alternative or additionally to the automatic closing device can be provided that the closing device manually between the opened one and closed state is switched or switchable. For example With professional cameras it is often desirable that as many as possible Functions are manually controllable.

When additional and particularly advantageous measure it can be provided that the closing device and / or the cover are made of an antistati rule material. This will additionally prevents dust from being attracted and entering the camera body can.

Farther it is possible, that adjacent, relatively movable or movable parts the closing device and / or the cover or at least their surfaces made of different materials with such properties are so that the electrostatic charge of these parts as possible is low. By a suitable combination of materials for each other rubbing parts or their surfaces can be electrostatic Charging be minimized. This also prevents dust from attracting and in the camera body can penetrate.

To For example, it may be provided that adjacent slats of the Lamellar closure or at least their surfaces of different Materials are made with such properties, so that the electrostatic charge of these parts is minimized. The different ones Materials from adjacent lamellae that rub against each other so selected that minimizes electrostatic charge due to this friction becomes. Alternatively you can also the surfaces the adjacent lamellae may be made of such materials.

A further advantageous possibility To avoid dust is realized by the moving or movable parts of the closing device and / or the cover made of an abrasion-free or at least abrasion-resistant material are. This ensures that within the camera body the Generation of dust due to abrasion is as low as possible.

Especially is the camera according to the invention a reflex camera. As with SLR cameras the lenses relatively common is the closing device for SLR cameras especially advantageous.

at further embodiments it is provided that the camera is provided for taking moving pictures is. For example, the camera can be used as a film camera, video camera, Camcorder or the like may be formed. Even such cameras can with be equipped interchangeable lenses, so that the closing device the interior of the camera body protects.

In addition, can the camera has an image sensor. The picture quality of the image sensor is particularly sensitive to dust. Thus, for cameras with image sensor the closing device especially advantageous.

Farther the object is achieved by the subject matter of claim 24.

According to the invention a closing device is provided, which is associated with the lens opening and is switched between an open and closed state or is switchable, wherein the lens opening completely in the closed state is closed.

By the closing device is the lens opening closable so that the entire camera body outward closed is. This is especially the case when the lens is changed and is currently not on the camera body. In this way it is possible that the camera body always remains closed and its interior is not exposed to external influences is.

For example is the closing device as a separate part formed between the camera body and the lens can be solved is fastened. In this embodiment can the closing device as a special accessory provided as needed. In addition, can this closing device for retrofitting used by existing cameras.

advantageously, can be provided that the closing device at least one lens having. As with the intermediate closing device the distance between the lens and the camera body is increased, the optical Properties of the lens to be adapted. With the lens or a suitable lens system, this increased distance can be compensated.

Finally is the closing device especially for provided the camera described above.

Further Features, advantages and particular embodiments of the invention are the subject of the dependent claims.

below becomes a preferred embodiment the camera according to the invention with reference to the attached Drawings explained in more detail. It demonstrate:

1 a schematic partial side sectional view of a preferred embodiment of a camera according to the invention with a disassembled lens, and

2 a schematic partial side sectional view of the preferred embodiment of the camera according to the invention with the attached lens.

A preferred embodiment of the camera according to the invention is in 1 shown. The camera includes a camera body 10 and a lens 12 , The camera body 10 is shown as a side sectional view. The objective 12 shown as a side view. The objective 12 is in 1 detached from the camera body. The camera body 10 has a lens opening 14 on, on the lens 12 detachable on the camera body 10 is fastened. Opposite the lens opening 14 is inside the camera body 10 a photosensitive layer 24 , In a classic analog camera, the photosensitive layer is 24 trained as a film. For a digital camera, the photosensitive layer is 24 designed as an electronic image sensor.

The objective 12 is by means of a coupling device on the camera body 10 fixable. The coupling device has a first coupling element 16 and a second coupling element 18 on. The first coupling element 16 is on the camera body 10 around the lens opening 14 attached around and formed substantially annular. The second coupling element 18 is on the lens 12 attached and also formed substantially annular. The first coupling element 16 and the second coupling element 18 are formed at least partially complementary to each other.

In this specific embodiment the coupling device is designed as a bayonet closure. Alternatively, the coupling device can also be used as a screw cap be educated. Other known coupling devices are possible.

Inside the camera body 10 is located behind the lens opening 14 a closing device 22 , The closing device 22 includes a movable cover 20 for opening and closing the lens opening 14 , The cover 20 the closing device 22 will be with the lens removed 12 closed and with mounted lens 12 open.

In 1 is the lens 12 from the camera body 10 dismantled and the closing device 22 is in the closed state.

2 shows the preferred embodiment of the camera according to the invention, wherein the lens 12 to the camera body 10 is mounted and the closing device 22 is in the open state.

Closing and opening the closing device 22 done automatically and / or manually. The closing device 22 can be mechanically and / or electrically closed. The mechanical closing device 22 For example, it may have one or more springs, which in the relaxed state cover 20 keep closed. In the tensioned state of the springs, the cover 20 by means of a mechanical switch held open against the tension of the spring or springs. In the electric closing device 22 can the cover 20 be opened and closed for example by means of an electric motor or magnetic switch.

In an automatic closing device 22 will the cover 20 then open when the lens 12 to the camera body 10 is mounted. These are located on the camera body 10 or on the first coupling element 16 one or more mechanical contact elements or electrical contacts. The mechanical contact elements or electrical contacts and the lens 12 are designed so that attaching the lens 12 to the camera body 10 opening the cover 20 causes.

For a manual closing device 22 located on the camera body 10 a switch, lever or the like for closing and opening the cover 20 , There is also the possibility that by the on-off switch of the camera, the closing device 22 is controlled. It would be with the camera off the cover 20 closed and always open when the camera is switched on. For the manual closing device 22 The user may want to change or remove the lens 12 by pressing the appropriate switch the cover 20 Close and after changing or removing the lens 12 to open again.

In this particular embodiment, the closing device works 22 in principle like a lamellar shutter. The cover 20 comprises a plurality of fins, which are arranged according to a specific scheme. When closed, the slats form the cover 20 to close the lens opening 14 , When opening the closing device 22 The blades are moved by the optical axis by means of a pivoting and / or sliding movement to the outside.

The cover 20 can also be designed as a blind. In this case, the shutter when opening the closing device 22 be wound up. Furthermore, there is the possibility that the blind when opening the closing device 22 in the upper and / or lower area of the camera body 10 is pushed. The cover 20 can also consist of two or more blinds.

In addition, the cover can 20 also consist of one or more surface pieces which are pivotally and / or displaceable on the closing device 22 are attached, so that by the pivoting movement or displacement movement of the patches, the lens opening 14 opened and closed.

The closing device 22 in particular has the feature that if the lens 12 not on the camera body 10 is attached, no dust inside the camera body 10 can penetrate. In particular, the image sensor of a digital camera is sensitive to dust. Also the other sensors and optical elements inside the camera body 10 are sensitive to dust, so that the quality of the recording can be affected. By the closing device according to the invention 22 Ensures that there is no dust or dirt in the camera body 10 can penetrate.

The The preferred embodiment described above merely provides a concrete example of the camera according to the invention.

In an alternative embodiment according to the invention, the closing device is designed as a separate device which is located between the camera housing 10 and lens 12 is releasably attachable. The alternati ve closing device is just like the lens 12 in 2 on the camera body 10 attached. Then the lens is 12 attachable to the alternative closing device. The alternative closing device is designed as an intermediate piece with coupling devices which are connected to the coupling devices of the camera housing 10 and the lens 12 are compatible. The alternative closure device can also be offered as a special accessory that is used when needed.

For existing cameras, the alternative closing device can be retrofitted. For this purpose, it may be provided that the alternative closing device has a lens or a lens system to the greater distance between the camera body 10 and the lens 12 to compensate. Thus, the same lens can be used either with or without the alternative closing device.

For the technical Realization of the closing device according to the invention The technology of known devices can be accessed. The closing device according to the invention can be constructed, for example, like a lamellar shutter. Of the Design effort is less, since no exact and short opening times required are.

Likewise, the closing device according to the invention can be constructed in principle like a diaphragm with adjustable aperture. In this case, the cover of the closing device, in contrast to the aperture must be completely closed. The closing device only has to be switchable between a closed and an opened state. Exact intermediate settings are not required, so that the design effort is relatively low.

The Closing device according to the invention can be mechanically and / or electrically opened and closed.

10

camera housing

12

lens

14

lens opening

16

first coupling element

18

second coupling element

20

cover

22

closing

24

photosensitive layer

Claims (27)

Camera with a camera body ( 10 ) and at least one detachable and / or interchangeable lens ( 12 ), wherein the camera body ( 10 ) at least one lens opening ( 14 ) and the lens ( 12 ) in and / or on the lens opening ( 14 ) is detachably fastened or attachable, characterized in that the camera body ( 10 ) at least one closing device ( 22 ), the lens opening ( 14 ) and is switched between an open and closed state or is switchable, wherein in the closed state, the lens opening ( 14 ) is completely closed. Camera according to claim 1, characterized in that the closing device ( 22 ) is automatically switched between the open and closed states or is switchable. Camera according to claim 2, characterized in that the closing device ( 22 ) by loosening the lens ( 12 ) of the camera body ( 10 ) is switched to the closed state or is switchable. Camera according to claim 2 or 3, characterized in that the closing device ( 22 ) by attaching the lens ( 12 ) to the camera body ( 10 ) is switched to the open state or is switchable. Camera according to one of the preceding claims, characterized in that the closing device ( 22 ) is switched mechanically between the open and closed state or is switchable. Camera according to claim 5, characterized in that the closing device ( 22 ) has at least one spring, by which the closing device ( 22 ) is kept in the closed state or is durable. Camera according to claim 5 or 6, characterized in that the closing device ( 22 ) has at least one mechanical element, by which the closing device ( 22 ) is kept in the opened state or is durable. Camera according to claim 6 and 7, characterized in that by the mechanical element, the closing device ( 22 ) is held against the tension of the spring in the opened state or is durable. Camera according to one of claims 1 to 4, characterized in that the closing device ( 22 ) is switched electrically between the open and closed state or is switchable. Camera according to claim 9, characterized in that the closing device ( 22 ) has at least one electric motor. Camera according to claim 9 or 10, characterized in that the closing device ( 22 ) has at least one magnetic switch. Camera according to one of the preceding claims, characterized in that the closing device ( 22 ) is designed as a lamellar closure. Camera according to one of claims 1 to 11, characterized in that the closing device ( 22 ) at least one cover ( 20 ) pivotally mounted on the closing device ( 22 ) is attached. Camera according to one of claims 1 to 11, characterized in that the closing device ( 22 ) at least one cover ( 20 ) which is displaceable on the closing device ( 22 ) is attached. Camera according to claim 14, characterized in that the cover ( 20 ) is designed as a blind. Camera according to one of the preceding claims, characterized in that the closing device ( 22 ) is manually switched between the open and closed state or is switchable. Camera after one of the previous An claims, characterized in that the closing device ( 22 ) and / or the cover ( 20 ) are made of an antistatic material. Camera according to one of the preceding claims, characterized in that the adjacent, relatively movable or movable parts of the closing device ( 22 ) and / or the cover ( 20 ) or at least whose surfaces are made of different materials having such properties, so that the electrostatic charge of these parts is minimized. A camera as claimed in claim 12 or any claim of claim 12 back Claims, characterized in that the adjacent lamellae of the lamella closure or at least their surfaces made of different materials with such properties are so that the electrostatic charge of these parts as low as possible is. Camera according to one of the preceding claims, characterized in that the movable or movable parts of the closing device ( 22 ) and / or the cover ( 20 ) are made of an abrasion-free or at least abrasion-resistant material. Camera according to one of the preceding claims, characterized characterized in that the camera is a single-lens reflex camera. Camera according to one of the preceding claims, characterized in that the camera is provided for taking moving pictures is. Camera according to one of the preceding claims, characterized in that the camera has an image sensor ( 24 ) having. Closing device for a camera with a camera housing ( 10 ) and at least one detachable and / or interchangeable lens ( 12 ), wherein the camera body ( 10 ) at least one lens opening ( 14 ) and the lens ( 12 ) in and / or on the lens opening ( 14 ) is detachably fastened or fastened, characterized in that the closing device ( 22 ) of the lens opening ( 14 ) and is switched between an open and closed state or is switchable, wherein in the closed state, the lens opening ( 14 ) is completely closed. Closing device according to claim 24, characterized in that the closing device ( 22 ) is formed as a separate part, which between the camera body ( 10 ) and the lens ( 12 ) is releasably attachable. Closing device according to claim 25, characterized in that the closing device ( 22 ) has at least one lens. Closing device according to one of claims 24 to 26, characterized in that the closing device ( 22 ) is provided for a camera according to one of claims 1 to 23.