JPH11218800A - Filter device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter device allowed to be simply and easily fitted to a disposable camera or the like and capable of applying various filter effects to a subject to be photographed. SOLUTION: The filter device 1 is composed of a camera holder 2, a front cover 3 and a filter plate 4. The holder 2 is provided with supporting plates 5, 6 to be relatively moved and holds a camera between the plates 5, 6. The cover 3 can be moved in the back-and-forth direction of the holder 2 and is prevented from interfering with a photographing lens projected from the camera. The plate 4 is rotatably fitted to the cover 3 and peripherally arranges plural filters 20. The holder 2 is fixed on the camera so that one filter 20 is arranged in the front of the photographing lens of the camera and the plate 4 is rotated in accordance with a photographing purpose to take a picture through a required filter 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device that can be mounted on a camera, and more particularly to a filter device for a camera suitable for mounting on a compact camera such as a disposable camera.

[0002]

2. Description of the Related Art In recent years, film makers have sold compact cameras with built-in films, commonly called "disposable cameras", and because of their excellent mobility and low cost, it is more familiar to take pictures. It is becoming. Under such circumstances, recently, there has been a demand for applying a special effect such as soft focus to a subject photographed by a compact camera.

In response to such needs, recently,
A compact camera (product name: pre-patch camera) that allows a filter to be mounted inside the camera, and a filter device (product name: Magic Photo Filter) for mounting a disposable camera are commercially available.

[0004]

When a special effect such as soft focus is to be applied to a subject, for example, 35 mm
In the case of a single-lens reflex camera, a method of attaching a special filter dedicated to the front side of the taking lens is generally used. On the other hand, in the case of a “pre-patch camera” in which a filter is directly mounted inside the camera, there is a problem that once the filter is set, the same special effect is applied to all subjects in the photograph until the film is completely removed.

On the other hand, "Magic Photo Filter"
Is a rubber band that can be wrapped around the camera and various filters can be mounted in front of the taking lens. By attaching / detaching / replacing the filter, it is possible to apply different filter effects to one film or switch to normal shooting. Is also possible. However, photographers using this Magic Photo Filter must keep in mind the storage location of other filters, as they must carry multiple filters constantly in case they need to be removed or replaced. And the replacement of the filter itself is troublesome.

An object of the present invention is to make it possible to take a picture with various filter effects in one film,
It is an object of the present invention to provide a camera filter device that can be easily exchanged from one filter to another filter. It is another object of the present invention to provide a camera filter device which can be attached to various types of cameras having different body dimensions and lens positions, which are sold by respective manufacturers.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera holder having a pair of support plates which are opposed to each other and are relatively movable, a front cover slidably mounted on the camera holder, and A filter plate mounted rotatably and having a plurality of filters arranged around a center of rotation thereof. Thus, since the support plate can be relatively moved, it is possible to cope with the depth dimension of a plurality of types of cameras. In addition, the filter plate that arranges the filters circumferentially,
Since the filter is rotatably mounted on the front cover, if one filter is adjusted to the taking lens of the camera, it can be easily changed to another filter by rotating the filter plate.

In the above-described camera filter device, the camera holder may have a support plate moving means for moving one of the support plates. In this case, by operating the support plate moving means, the camera can be held in response to the changing camera depth dimension. In the above-described camera filter device, the support plate moving means may include a feed screw associated with one support plate and a set dial screwed to the feed screw. In this case, by rotating the set dial, the feed screw can be rotated to move one of the support plates.

In the above-described camera filter device, the front cover may have an opening formed larger than any of the filters of the filter plate. As a result, one filter can occupy a plurality of positions in the opening, and can correspond to subtly different lens positions of a plurality of types of cameras.

In the above-described camera filter device, the front cover has a leg inserted into the camera holder, and a protrusion is formed near an end of the leg inserted. A recess for receiving the projection may be formed in the interior, and the front cover may be movable within a range in which the projection is received in the recess inside the camera holder. As a result, it is possible to prevent the protrusion from moving in the recess and dropping the front cover from the camera holder.

In the above-described camera filter device, the recess may have an uneven bottom surface, and the projection of the front cover may engage with the unevenness of the recess. As a result, the projections are engaged with the unevenness, and unintended sliding of the front cover can be prevented. In the above-described camera filter device, the filter plate may be provided with a large number of irregularities on the outer periphery thereof, and the front cover may be provided with a projection that engages with the irregularities on the outer periphery of the filter plate. . As a result, the filter plate can be rotated by clicking, and unintended rotation of the filter plate can be prevented.

The object of the present invention is to provide a camera holder having a pair of support plates disposed to be opposed to each other and movable relative to each other, a filter plate rotatably mounted on the camera holder, and having a plurality of filters arranged around the center of rotation thereof. This is also achieved by a camera filter device having the following.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera filter device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the appearance of a camera filter device according to the present embodiment. As shown in FIG. 1, a camera filter device 1 of the present embodiment includes a camera holder 2 that holds a camera body, a front cover 3 that is slidably mounted on the camera holder 2, and a front cover 3. It is constituted by a filter plate 4 which is rotatably mounted.

FIG. 2 is a side view including a partial cross section of the filter device 1. Camera holder 2 for holding the camera
Is provided with a pair of support plates 5 and 6. One support plate 5 is integrated with the camera holder body 7 side, and the other support plate 6 has its base 8 inserted into a cavity inside the camera holder 2 so that the position with respect to the support plate 5 can be changed.

The base 8 of the support plate 6 is screwed into a feed screw 10 of a set dial 9 provided on the camera holder body 7. As a result, the user can move the base 8 screwed to the feed screw 10 by rotating the set dial 9, and can change the amount of protrusion of the support plate 6 from the camera holder body 7. This makes it possible to change the length m between the support plates 5 and 6 according to the camera to be mounted.

Camera fixing rubbers 11 and 12 are adhered to the support plates 5 and 6 on the surfaces facing each other. Thereby, the camera can be held in a stable state by the elasticity of the rubber. The front cover 3
For example, it is formed of a transparent material or a translucent material such as acrylic or plastic, and includes a rectangular plate portion 13 and a pair of parallel legs 14 inserted into the camera holder body 7 below the plate portion 13. Since the front cover 3 is made of a transparent or translucent material, the filters on the filter plate 4 can be seen through the front cover 3 and the position of the desired filter can be confirmed.

FIG. 3 is a sectional view from above of the camera filter device 1 showing the moving mechanism of the support plate 6 and the structure of the parallel legs 14. As shown in FIG. 3, a small projection 15 is provided at the tip of each parallel leg 14.
A recess 16 for receiving the projection 15 is formed inside the side wall of the camera holder body 7. Thereby, the sliding of the front cover 3 in the direction of the arrow A (FIG. 1) is limited to the movement range of the projection 15 in the recess 16, and the falling off of the front cover 3 from the camera holder 2 can be prevented.

The bottom surface of the recess 16 is formed with minute irregularities, and the engagement of the irregularities with the minute projections 15 can prevent unintended sliding of the front cover 3.
An adjustment knob 17 is provided near the parallel leg portion 14 of the front cover 3 so as to project in a direction substantially perpendicular to the moving direction of the front cover 3. The adjustment knob 17 is used by a photographer to put his / her finger when adjusting the amount of protrusion of the front cover 3 from the camera holder 2 when setting the camera, and facilitates the sliding operation.

As shown in FIG. 2, a boss 18 is formed on the plate portion 13 of the front cover 3 so as to project toward the camera holder 2 when the front cover is assembled, and the circular filter plate 4 is rotatable there. Mated. In the filter plate 4, a plurality of (five in FIG. 2) filter mounting windows 19 are formed at equal intervals around a boss 18 serving as a rotation axis. One of the filter mounting windows 19 is open for normal photographing, and the other window 19 has a predetermined special effect filter 20 mounted thereon. As the special effect filter, for example, a color effect filter such as pink or sepia, a soft effect filter, a multiplex photographing effect filter capable of photographing another person, a filter with illustration, and the like can be attached. As one type of filter, a lens such as a cut lens may be mounted.

The filter plate 4 has a large number of projections and depressions 21 formed on the outer periphery thereof, and a projection 22 for engaging with the projections and depressions 21 is formed below the front cover 3. By the engagement of the projections and depressions 21 and the projections 22, the photographer can click and rotate the filter plate 4 when selecting a filter, and the desired filter 20 can be stably disposed in front of the photographing lens of the camera.

The front cover 3 is provided with a window (opening) 23 for exposing each filter 20 including a transparent window. The opening 23 serves as a guide for positioning of the taking lens when the camera is mounted on the camera filter device 1. The openings 23 are provided in the filters 20 corresponding to the photographing lens positions of a plurality of types of cameras to be mounted.
It is formed with a larger diameter than that. Thereby, each filter 20 can be set at various height positions in the opening 23, and can correspond to the photographing lens positions of different cameras. FIG. 4 shows a state where the filter device 1 is mounted on the camera 24 in this manner.

An adjusting mechanism for the camera of the camera filter device 1 according to the present embodiment will be described. FIG. 5 shows one model of a camera 24 (for example, a disposable camera) to which the filter device 1 is attached. As described above, the various cameras marketed by the respective manufacturers are not the same in dimensions, but have different camera depth dimensions D, lens protrusion lengths d, and lens heights H. In view of such a current situation, consideration has been given to the camera filter device 1 according to the present embodiment so that the camera filter device 1 can be attached to each camera with various adjustment mechanisms.

The different camera depth dimension D is dealt with by rotating the set dial 9 below the camera holder 2 and changing the distance m between the support plates 5 and 6 as described above. Also, for different lens protrusion lengths d, put a finger on the adjustment knob 17 and move the front cover 13
Is slid with respect to the camera holder 2.

Further, for different lens heights H (distances between the bottom surface of the camera and the center of the photographing lens), as shown in FIG. With the lens a and the lens b having the smallest lens height H positioned on the rotation trajectory of the filter, an opening 2 having a size sufficient to include both lenses a and b.
3 is formed on the front cover 3.

Next, a specific procedure for mounting the camera filter device 1 of the present embodiment on the camera 24 by operating each of the adjusting mechanisms described above will be described with reference to FIGS. First, the set dial 9 is rotated, the distance m between the support plates 5 and 6 is appropriately expanded, the adjustment knob 17 is picked up, and the front cover 3 is slid in a direction away from the camera holder 2, and the photographing lens of the camera 24 is taken. The mounting target camera 24 is inserted between the support plates 5 and 6 so that the filter plate 4 and the filter plate 4 do not interfere with each other.

Next, the camera 24 is generally moved in the direction of arrow B (FIG. 4) with respect to the filter device 1 so that the taking lens 25 of the camera 24 is included in the opening 23 of the front cover 13, and then the filter is further moved. The camera position with respect to the filter device 1 is further finely adjusted while rotating the filter plate 4 so that the center of the camera 20 coincides with the center of the photographing lens of the camera 24.

Next, when the position of the camera 24 in the direction B is determined in this manner, the set dial 9 is turned while maintaining the position, the distance m between the support plates is reduced, and the camera 24 is moved to the support plates 5 and 6. And fix it. Next, the front cover 3 is returned to the camera holder 2 side via the adjustment knob 17, and the filter 20 is brought closest to the taking lens 25 of the camera 24.

Next, the filter plate 4 is rotated,
A desired filter 20 or a transparent window 19 is aligned with the photographing lens 25 to photograph a subject. Thus, the camera filter device 1 is mounted on the camera. In order to remove the camera filter device 1 from the camera 24, the set dial 9 may be turned in a direction opposite to the direction when the set dial 9 is mounted to increase the distance between the support plates.

As described above, according to this embodiment, various special effects can be applied to a subject in one film only by rotating the filter plate 4. Since the filter plate 4 of the present camera filter device 1 also has a transparent window in which the filter 20 is not provided, normal photographing is possible. Furthermore, the camera filter device 1 has a configuration in which each filter 20 is circumferentially arranged on a rotatable filter plate 4 and a large opening 23 is provided at a front cover portion on the filter rotation orbit, so that all cameras to be mounted are mounted. The center of each photographing lens 25 of 24 and the center of each filter 20
B direction movement of the camera 24 with respect to the filter device 1;
The adjustment can be made by rotating the filter plate 4.

Since the filter plate 4 is configured to be click-rotated with respect to the front cover 3, a desired filter 20 can be stably disposed in front of the photographing lens 25 of the camera 24. In addition,
The finer the rotating click, the better the accuracy of aligning the lens center with the filter center. Further, since the front cover 3 is formed of a transparent material, the position of each filter 20 can be confirmed from the outside through the front cover 3, and the photographer can see how much the filter plate 4
By rotating, it can be easily grasped whether the desired filter 20 can be set on the taking lens.

The present invention is not limited to the above embodiment, and various modifications are possible. For example, the number of filters 20 mounted on the filter plate 4, the shapes of the front cover 3, the openings 23, and the respective adjustment mechanisms described above are not limited to those described in the above embodiment, but may be various. Variations are possible. For example, without a front cover,
The filter plate may be directly rotatably provided on the camera holder body 7.

The filter device for a camera of the present invention is not limited to a disposable camera, but may be mounted on another compact camera (35 mm camera, APS).
Needless to say, it can be attached to a camera or the like.
Furthermore, if each dimension is adapted, a filter device for mounting a general single-lens reflex camera or a medium format camera (brownie size) can be provided.

[0033]

As described above, according to the present invention, the filter plate is rotated as required, and the desired filter is brought close to the photographing lens, thereby continuously applying various filter effects to the subject and photographing. can do. Further, the filter device for a camera according to the present invention can be easily mounted by using various adjustment mechanisms in correspondence with a large number of cameras sold by various manufacturers, and the user can easily enjoy the filter shooting.

[Brief description of the drawings]

FIG. 1 is an external view of a camera filter device according to an embodiment of the present invention.

FIG. 2 is a side view including a partial cross section of the camera filter device of FIG. 1;

FIG. 3 is a sectional view of the camera filter device of FIG. 1;

FIG. 4 is an external perspective view of the camera filter device in a state where the camera is mounted.

FIG. 5 is a diagram showing one model of a camera mounted on the camera filter device.

FIG. 6 is a conceptual diagram of forming an opening of a front cover in a camera filter device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Camera filter device 2 ... Camera holder 3 ... Front cover 4 ... Filter plate 5, 6 ... Support plate 7 ... Camera holder main body 8 ... Base 9 ... Set dial 10 ... Feed screw 11, 12 ... Camera fixing rubber 13 ... Plate part 14 ... Parallel leg 15 ... Protrusion 16 ... Recess 17 ... Adjustment knob 18 ... Boss 19 ... Filter mounting window 20 ... Special effect filter 21 ... Unevenness 22 ... Protrusion 23 ... Opening 24 ... Camera 25 ... Shooting lens

Claims (8)

[Claims] 1. A camera holder having a pair of support plates disposed to be opposed to each other and movable relative to each other; a front cover slidably mounted on the camera holder; A filter device for a camera, comprising: a filter plate on which a plurality of filters are arranged around a center. 2. The camera filter device according to claim 1, wherein the camera holder has a support plate moving means for moving one of the support plates. 3. The camera filter device according to claim 2, wherein the support plate moving means has a feed screw associated with one of the support plates, and a set dial screwed to the feed screw. Camera filter device. 4. The camera filter device according to claim 1, wherein the front cover has an opening formed to be larger than any of the filters of the filter plate. Camera filter device. 5. The camera filter device according to claim 1, wherein the front cover has a leg inserted into the camera holder, and the leg is inserted. A protrusion is formed near the end, a recess for receiving the protrusion is formed inside the camera holder, and the front cover moves within a range where the protrusion is received in the recess inside the camera holder. A filter device for a camera, characterized in that it is possible. 6. The camera filter device according to claim 5, wherein a bottom surface of the recess is uneven, and the projection of the front cover is engaged with the unevenness of the recess. Filter device. 7. The filter device for a camera according to claim 1, wherein the filter plate has a large number of irregularities on the outer periphery thereof, and the front cover has a plurality of irregularities on the outer periphery of the filter plate. What is claimed is: 1. A filter device for a camera, comprising: a projection that engages with the unevenness. 8. A camera holder having a pair of support plates which are disposed to be opposed to each other and are relatively movable, and a filter plate which is rotatably mounted on the camera holder and has a plurality of filters arranged around a center of rotation thereof. A filter device for a camera.