JP3116953U - Adjusting device for rotation effect filter for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily operate a rotation effect filter while looking into a viewfinder in a state where a camera lens hood is mounted on a lens barrel portion without impairing an original function of a camera lens hood attached to a lens barrel of a camera. An object of the present invention is to provide an adjustment device for the purpose.
SOLUTION: An adjustment device that is detachable is provided at any one of the circumferential portions of a camera lens hood and at a position that is engaged with a rotation effect filter at an appropriate position. Rotation effect filter outer periphery by rotating the filter rotation dial up and down by connecting the drive of the rotation drive arm by the rotation operation of the direction movement dial with the rotation drive arm and filter rotation dial connected to the dial and driving It is characterized in that the rotation can be adjusted by contacting the surface.
[Selection] Figure 1

Description

  The present invention easily adjusts the rotation effect filter, which is a focus adjustment auxiliary member such as a polarizing filter and a cross filter, which is used to enhance the shooting effect when shooting using a lens hood for the camera. It is related with the apparatus for doing.

  2. Description of the Related Art Conventionally, camera lens hoods have been prepared in the camera lens to shield light from an area outside the shooting angle of view, and are attached to the tip of the lens barrel. On the other hand, in order to enhance the photographing effect, various kinds of filters such as a polarizing filter and a cross filter are attached to the tip of the lens barrel to enhance the photographing effect. For example, in the case of a polarizing filter, the rotation position around the optical axis is changed to limit the polarization from the subject and to sharpen the captured image. In the case of the cross filter, the cross-shaped blur direction is changed by changing the rotational position around the optical axis.

Various types of filters, called rotation effect filters, are mounted on the tip of the lens barrel as filters that can change the shooting effect by changing the rotational position around the optical axis. Since the subject's own color is faithfully reproduced as a filter for removing reflection, a polarizing filter (PL filter) or the like is adopted as an indispensable item for landscape photography. These are referred to as rotation effect filters. When using a filter with a single-lens reflex camera, it is necessary to check the effect of the rotation effect filter with a viewfinder. Like the rotation effect filter, the above-mentioned camera lens hood attached to the tip of the lens barrel is Even while wearing this camera lens hood, take a picture while rotating the rotation effect filter. Those it is desirable has a configuration capable of performing.

Therefore, for example, FIG. 9 is a partial cross-sectional view showing an example in which a polarizing filter is used as a rotation effect filter. The polarizing filter X1 includes a movable frame 31 that supports the periphery of the polarizing filter X1 formed in a disk shape, and a fixed frame 32 that supports the movable frame 31 so as to be rotatable about the optical axis. The fixed frame 32 is engaged with the lens barrel 30 by screwing a male screw groove 33 formed on the outer peripheral surface of the fixed frame 32 with a female screw groove 34 formed on the inner peripheral surface of the distal end portion of the lens barrel 30. When attached, the movable frame 31 is operated and rotated with respect to the fixed frame 32 so that the rotational position of the polarizing filter X1 around the optical axis can be arbitrarily adjusted. A camera lens hood Y1 is attached to the outer peripheral surface of the tip of the lens barrel 30. For example, a bayonet structure is used as the attachment structure of the camera lens hood Y1.

Therefore, as described above, the camera lens hood Y1 is disposed around the polarizing filter X1 in order to enable the rotation operation of the polarizing filter X1, which is a kind of rotation effect filter, even when the camera lens hood Y1 is attached. The outer diameter of the lens barrel 30 is sufficiently large so as to secure a space that allows the photographer's fingertip to enter. Therefore, when photographing using the polarizing filter X1 using the camera lens hood Y1, as shown in FIG. 9, the photographer inserts a finger through the front opening of the camera lens hood Y1, and uses the fingertip to filter the polarizing filter. The movable frame 31 of X1 can be operated and rotated with respect to the lens barrel 30.

Further, as shown in FIG. 10, an opening Y2a having a hole into which a user's finger can be inserted is provided in a part of the camera lens hood Y2, and the finger is inserted into the camera lens hood Y2 through the opening Y2a. Thus, a filter that enables the rotation of the polarizing filter X1 has been proposed. In this camera lens hood Y2, a space for inserting a finger around the polarizing filter X1 is not ensured. Therefore, the diameter of the camera lens hood Y2 can be reduced and the photographer's hand can adjust the polarizing filter X1. This makes it possible to avoid losing the field of view in the viewfinder.

In addition to the above-described techniques, as a technique for easily operating the rotation effect filter with the camera lens hood attached, an opening is provided in the camera lens hood as in JP-A-11-295780, and the opening is fitted into the opening. A technique has been proposed in which a lid member is provided, the lid member is removed during use, and the lid member is attached again after adjustment.

However, in the conventional camera lens hood Y1 in FIG. 9, when the photographer operates the polarizing filter X1 with one hand while looking through the viewfinder and checking the subject, the hand is inserted through the front opening of the camera lens hood Y1. May block part of the lens barrel 30, which may cause the viewfinder field to be blurred, which is not preferable in confirming the photographing screen. In addition, the outer diameter of the camera lens hood Y1 tends to be larger than the lens barrel 30 in order to secure a space for inserting a finger into the camera lens hood.

Further, as shown in FIG. 9 and FIG. 10, there is a flower shape called a flower shape, and a flower-shaped cut is made at the front part of the camera lens hood to form a front side opening. The shape of the figure cut to the extent that a finger can be inserted is often inappropriate, and since it is fixed when attached to the lens barrel 30 side, it cannot be rotated, thus preventing light from entering. May not be possible. Therefore, in particular, camera lens hoods are often long for the purpose of preventing the incidence of light, and many cannot be adjusted with a finger. In this case, in general, in order to check the subject, the polarizing filter is rotated to obtain an optimal location, and there is a problem that the finger does not enter the camera lens hood. After obtaining the optimum conditions, there was a hassle of mounting again. Further, since the effect of the polarizing filter cannot be grasped because the light is directly intruded from the state in which the camera lens hood is removed, it is a normal operation to finally attach the camera lens hood and view the result. In other words, it can be said that adjustment of the polarizing filter is impossible when the camera lens hood is not used, and the photographic results are not satisfactory, so it is desirable to be able to adjust the polarizing filter when wearing the camera lens hood to obtain satisfaction Met.

In the above point, with respect to the technique of FIG. 10 in which an opening is provided on the upper part of the camera lens hood, if the opening Y2a exists, the finger is pulled out from the opening Y2a at the time of actual release and the like. In this case, light outside the angle of view from the opening Y2a is incident on the lens barrel 30, and the original function of the camera lens hood is impaired.

In Japanese Patent Application Laid-Open No. 11-295780 (not shown) which attempts to eliminate these drawbacks, for example, the camera lens hood is made smaller in size or provided with an opening in the hood so that the filter can be easily operated with a finger. However, the lid member must be removed when the rotation effect filter is adjusted, and the lid member must be attached again after the adjustment, which causes the inconvenience of having to remove and remove the lid each time. In particular, it requires an opening area until the lid is removed and the finger is inserted, so that the adjustment is performed by inserting the finger, so that light always enters from the opening to increase the shooting effect. Although an effect filter was used for adjustment, satisfactory results were never obtained, so the practicality was poor. In addition, there are several types of camera lens hoods according to the lens aperture, and a dedicated mold must be made each time, which increases the cost, and it is impossible to use existing camera lens hoods. there were. Therefore, there has been a demand for means for solving these various problems described above while utilizing a conventional camera lens hood.

In addition, a lens hood with an adjusting device such as that disclosed in Japanese Patent Application Laid-Open No. 9-292647 has been disclosed. However, this technique is intended to abut the outer peripheral surface of the filter while pushing a rotating roller into the filter. For example, it is a mechanism that returns to a predetermined position by the force of the roller support spring that is always elastically contacted.Therefore, when adjusting, the roller must be rotated while being pushed in many times. It is difficult to make fine adjustments to the filter because it is too involved, and if it is too weak, there are drawbacks such as hindering hood attachment and removal while remaining in contact with the filter. Further, there is also disclosed a technique in which a rotating device having a belt-suspended shape is fitted to two wheels as disclosed in Japanese Patent Laid-Open No. 9-258300. Etc., and the wheel of the rotating part is rotated with a finger while pushing it into contact with the filter. Depending on the force, an excessive force is applied to the filter, so the rotation effect is deteriorated and the filter is deformed. It becomes easy. Also, when there is a gap between the two wheels when the belt comes into contact, the finger pressure is biased to one of the wheel-shaped dials, and the adjustment by the belt is attempted, but the filter cannot slip and rotate. Will occur. Since each of the above-mentioned two disclosed technologies depends on finger pressure, adjusting while pressing causes many drawbacks.

In view of these problems in the prior art, the present invention can easily operate the rotation effect filter while looking into the viewfinder with the camera lens hood attached to the lens barrel to solve the problems. Furthermore, the present invention provides an adjustment device for a rotation effect filter for a camera that is used by being mounted on a camera lens hood, and intends to eliminate the above-mentioned drawbacks.

  As a result of various studies to solve the above problems, the above object can be achieved effectively by the present invention.

That is, the present invention is an apparatus for adjusting a rotation effect filter such as a polarizing filter or a cross filter that is mounted on a camera lens and used so as to surround the tip of the lens barrel of the camera. In order to easily operate the rotation effect filter attached to the tip of the lens barrel with respect to the camera lens hood that can be detachably attached to the camera lens hood, the lens mirror can be rotated around a rotation axis parallel to the optical axis and the lens mirror. An adjustment device is provided that is supported so as to be movable in the radial direction of the cylinder, and is detachable at any one of the circumferential portions of the camera lens hood and at a position where it is engaged with the rotation effect filter at an appropriate position. The adjusting device includes a rotary drive arm and a filter rotary dial that are connected to and driven by the direction moving dial, and the rotary drive arm is internally provided with a rotation clutch. A click rotation mechanism is provided to transmit a sense of click, and a filter rotation dial that is pivotally supported by the rotation drive arm is constructed. The filter rotation dial is connected to the drive of the rotation drive arm by the rotation operation of the direction moving dial. By moving up and down, the lens is opposed to the outer peripheral surface of the rotation effect filter mounted on the lens barrel, moved inward in the radial direction of the camera lens hood, and brought into contact with the outer peripheral surface of the rotation effect filter. By rotating the dial, it can be transmitted to the rotation effect filter to adjust the rotation, and is detachable from the camera lens hood.

According to the adjustment device for a rotation effect filter for a camera of the present invention, it is attached to any one of the circumferential portions of the camera lens hood in order to operate a part such as a polarizing filter attached to the tip of the lens barrel. The photographer can look at the viewfinder at any position and turn the dial with his / her finger to check the attachment effect without removing the camera lens hood each time the polarizing filter rotates. Since the point of the polarizing filter effect can be found instantly, the operability is greatly improved. In addition, light outside the angle of view is prevented from entering the lens barrel, and the original light shielding effect of the camera lens hood can be secured, which is extremely effective in realizing high-quality shooting with a high shooting effect. It will be a thing.
In particular, the fact that the main device of the present invention can be used by performing a mounting process on a conventional camera lens hood does not require a new camera lens hood to be set up easily. In addition, since it is detachable, being able to be used while being removed and replaced with another camera lens hood many times, it is possible to refrain from extra purchases and to achieve a particular economic effect.
As described above, the effect produced by the camera rotation effect filter adjusting device according to the present invention is tremendous, and provides an excellent economic effect that is extremely practical and beneficial.

  In order to easily operate the rotation effect filter attached to the distal end of the lens barrel, the present invention relates to any one of the circumferential parts of the camera lens hood and at an appropriate position with respect to the rotation effect filter. It is provided at a suitable location, and can be applied to any surface by applying it to any one of the side surfaces of the hood or the so-called hood peripheral surface on the top surface. The device of the present invention can also be applied to an existing camera lens hood, and it is only necessary to provide a groove for receiving a filter rotation dial and a hole for attaching a gantry to the camera lens hood. Of course, it is only necessary to provide a new camera lens hood from the beginning. Since the size of the dial and the handle is sufficient to be turned with a finger, the shape of the hood is not particularly limited, so that it can be applied to various hoods such as a cylindrical shape and a flower shape.

  Hereinafter, an embodiment of a camera lens rotation effect filter adjusting device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a use state of an embodiment of the present invention, FIG. 2 is a front view of the embodiment, FIG. 3 is a sectional view of the operation of the embodiment, and FIG. It is the top view showing an internal structure, sectional drawing, and a bottom view.

As shown in FIG. 1, with the apparatus main body 1 attached to the outer periphery of a camera lens hood 10 attached so as to enclose a lens barrel 11, a filter rotation dial 4 moves to the camera lens hood 10 to rotate the rotation effect filter. In order to make the filter rotation dial 4 contact the rotation effect filter 12, the hood removal hole 13 for making contact with the lens barrel 11 is processed and the rotation effect filter 12 fitted to the lens barrel 11 is rotated. By rotating the direction moving dial 2 as shown in FIG. 1 to FIG. 3, the filter rotating dial 4 moves up and down in conjunction with each other so as to move inward or outward in the radial direction. In this case, since the distance from the camera lens hood 10 to the rotation effect filter 12 fitted to the lens barrel 11 varies depending on the outer diameter and thickness of the hood, the barrel diameter and the filter diameter, the filter rotation dial As shown in FIG. 2, it is desirable that the vertical movement distance of 4 is normally 15 to 25 mm as shown in FIG.

In the operation procedure, the direction moving dial 2 is rotated with the finger A, the filter rotating dial 4 is moved inward in the radial direction and brought into contact with the rotation effect filter 12, and the filter rotating dial 4 is rotated with the finger A to rotate the dial ring. The rotation effect filter 12 is rotationally adjusted by contact rotation with 9. The rotation effect filter 12 is composed of a movable frame that supports the periphery of the rotation effect filter 12 formed in a disc shape, and a fixed frame that supports the movable frame so as to be rotatable around the optical axis. The fixing frame can be attached to the lens barrel 11 by screwing a male screw groove formed on the outer peripheral surface thereof into a female screw groove formed on the inner peripheral surface of the front end portion of the lens barrel 11, and When attached, the movable frame is operated and rotated with respect to the fixed frame, so that the rotational position of the rotation effect filter 12 around the optical axis can be arbitrarily adjusted. The state of FIG. 1 shows a state in which the filter rotation dial 4 is in contact with and engaged with a movable frame that rotates the rotation effect filter 12. In order to adjust the color of the subject faithfully while looking through the viewfinder, By rotating the filter rotation dial 4 with the photographer's finger A, the movable frame rotates in conjunction with each other, and the polarization can be adjusted. Since the rotation direction can be either left or right, the polarization point can be found instantly.

Next, the internal structure will be described in detail with reference to FIGS. From each figure, the body body 1a includes a rotation drive arm 3 and a filter rotation dial 4 that pivotally support and connect the direction moving dial 2, and a movement adjusting pin 7 fixed to the direction moving dial 2 by a set screw 8. The rotation drive arm 3 is engaged with the movement adjustment pin 7. The direction moving dial 2 and the movement adjusting pin 7 are screwed together so that the movement adjusting pin 7 moves up and down in accordance with the rotation of the direction moving dial 2 and is connected to the up and down movement to drive the rotary drive arm 3 up and down. . A filter rotation dial 4 is fitted in the rotation drive arm 3 and fixed by a dial mounting screw 6. Further, a click spring 5 is fitted inside the filter rotation dial 4 as a click mechanism for transmitting a click feeling during rotation, and the click spring 5 is applied as an internal shape of the rotary drive arm 3 as shown in the figure. It is fitted in a plurality of pinion-shaped protruding gear-type dial diameter grooves, and is provided so that a reliable rotation operation is transmitted when the filter rotary dial 4 is rotated.

From these figures, the moving range of the filter rotation dial 4 varies substantially depending on the camera lens hood diameter and thickness and the rotation effect filter 12 attached to the lens barrel as the lens diameter as described above. Even at the time of use, it can be sufficiently compensated with a moving distance of about 20 mm from a small diameter to a large diameter. Therefore, in the combination of the direction moving dial 2 and the rotation driving arm 3 interlocked with the movement adjusting pin 7 as shown in the embodiment, the direction moving dial 2 and the movement adjusting pin 7 have a moving distance by screwing as described above. Since it becomes the transmission distance, the moving distance can be freely changed by the screw length of the direction moving dial 2.

Next, FIG. 7 shows a structural diagram of the filter rotary dial 4, in which FIG. A is a front view and FIG. B is a cross-sectional view along A-A ′. From the figure, the filter rotation dial 4 has a circular shape, and the dial circumference is directly rotated by a finger or palm. After the contact with the rotation effect filter 12, the filter rotation dial 4 A dial ring 9 made of a rubber material is fitted on the contact outer peripheral surface of the rotary dial 4 to improve the rotation by friction and prevent slipping. In addition, since most of the polarizing filter movable frame is engraved with a finger so that it can be easily turned with a finger, the dial ring 9 fitted to the filter rotation dial 4 can prevent slipping when the rotation effect filter 12 is rotated. Since a material having a large frictional force may be used, it may be appropriately made of a material instead of the rubber material. Similarly to the above, the direction moving dial 2 may be processed to prevent slipping when rotated by a finger or hand, or a rubber ring or the like may be fitted, and in this case, it is useful for fine adjustment in the moving operation. .

FIG. 8 is a structural diagram of the rotary drive arm 3, wherein FIG. C is a plan view and FIG. D is a right side view. As described above, the projecting gear type dial shape is provided inside the substantially circular shape of the rotation drive arm 3, and the click spring 5 fitted to the valley portion repels and urges the spring each time it is rotated to give a click feeling. introduce. A filter rotation dial 4 is fitted on the gear-shaped dial shape side of the rotation drive arm 3 and both are fixed by a dial mounting screw 6 from the back side.

In addition, although the transmission means by the direction moving dial 2 and the rotation drive arm 3 is described as the means for transmitting and transmitting to the filter rotation dial 4 in the present embodiment, the means for transmitting the movement and rotation is in this embodiment. Without using the direction moving dial 2, the rotation drive arm 3 is encased with a spring material that conveys the vertical movement, and the filter rotating dial 4 and dial ring 9 are directly pushed inward in the radial direction from above. The present invention also includes adjustment of various rotation effect filters as a simple structure in which the filter 12 is brought into contact and adjusted while turning the dial and the upward movement is returned by a repulsive biasing force by a biasing member such as a spring material. It is what is done. In the present embodiment, in order to reduce the weight, the main structural member such as the main body 1a, the rotation drive arm 3 and the filter rotation dial 4 is made of aluminum die-cast material. Although it is desirable to use a lightweight material in the entire apparatus, the material of each apparatus is not limited at all.

It is a front view of the use condition in one Example of this invention. The front view of the apparatus main body of the Example. The action sectional view of the example. The top view showing the internal structure of the Example. Sectional drawing showing the internal structure of the Example. The bottom view showing the internal structure of the Example. The block diagram of a filter rotation dial. The block diagram of a rotation drive arm. FIG. 10 is a partial cross-sectional view showing another conventional example 1; It is a partial sectional view showing other conventional example 2.

Explanation of symbols

1: Device body 1a: Body body 2: Direction moving dial 3: Rotating drive arm 4: Filter rotating dial 5: Click spring 6: Dial mounting screw 7: Movement adjusting pin 8: Set screw 9: Dial ring A: Finger B: Hood hole 10: Camera lens hood 11: Lens barrel 12: Rotation effect filter 13: Hood hole Y1: Camera lens hood Y2: Camera lens hood Y2a: Opening X1: Polarizing filter 30: Lens barrel 31: Movable frame 32: Fixed frame 33: Male thread groove 34: Female thread groove

Claims (1)

A device for adjusting rotation effect filters such as polarizing filters and cross filters used on camera lenses, and is detachably attached to the lens barrel so as to surround the tip of the camera lens barrel. The camera lens hood can be rotated around a rotation axis parallel to the optical axis and in the radial direction of the lens barrel in order to easily operate the rotation effect filter attached to the tip of the lens barrel. An adjustment device is provided that is movably supported and is detachable at any one of the circumferential portions of the camera lens hood and engages the rotation effect filter at an appropriate position. Is equipped with a rotary drive arm and a filter rotary dial that are connected to and driven by the direction moving dial, and the rotary drive arm transmits the click feeling during rotation to the inside. A filter rotation dial that is pivotally supported by the rotation drive arm, and the filter rotation dial is connected to the drive of the rotation drive arm by the rotation operation of the direction movement dial and is operated to move up and down. By facing the outer peripheral surface of the rotation effect filter mounted on the lens barrel, moving inward in the radial direction of the camera lens hood, contacting the outer peripheral surface of the rotation effect filter, and rotating the filter rotation dial An apparatus for adjusting a rotation effect filter for a camera, characterized in that it can be transmitted to a rotation effect filter and adjusted for rotation, and is detachable from a camera lens hood.

Images