JP2003149707A - Unit for adjusting rotational effect filter for camera lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adjusting unit which makes it possible to easily operate a rotational effect filter while peeping in a viewfinder with a camera lens hood attached on a lens barrel part without spoiling the original function of the camera lens hood mounted on the lens barrel of a camera. SOLUTION: The adjusting unit is freely attached and detached at one of circumferential positions of the camera lens hood and can be engaged with the rotational effect filter at a proper position. Various problems are solved by providing the adjusting unit for the rotational effect filter for a camera lens characterized in that a rotary filter adjusting dial, a rotary handle for driving the rotary filter adjusting dial, and an adjustment moving dial for engaging the rotary filter adjusting dial with the rotational effect filter are constituted on a rack part and various rotational effect filters can easily be adjusted by transmitting rotation from the adjustment moving dial and rotary handle.

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a polarizing filter and a cross filter used to enhance a photographing effect when photographing using a lens hood in a camera. The present invention relates to a device for easily adjusting a rotation effect filter as a focus adjustment assisting member. 2. Description of the Related Art Conventionally, a camera lens hood has been prepared for a camera lens to block light from an area outside the angle of view, and is attached to the tip of a lens barrel.
On the other hand, in order to enhance the shooting effect, various filters such as a polarizing filter and a cross filter are mounted on the front end of the lens barrel to enhance the shooting 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 the captured image is sharpened. In the case of a cross filter, the direction of the cross-shaped blur is changed by changing the rotational position around the optical axis. [0003] Various filters called rotation effect filters are mounted on the distal end of a lens barrel as filters capable of changing the photographing effect by changing the rotation position around the optical axis. Since the color of the subject itself is faithfully reproduced as a filter that removes the surface reflection of light, a polarizing filter (PL filter) is used as an indispensable element for landscape photography. When a filter called a filter is used in a single-lens reflex camera, it is necessary to check the effect of the rotation effect filter with a viewfinder, and the camera is attached to the tip of the lens barrel similarly to the rotation effect filter. The lens hood is
It is desirable that the camera be configured so that shooting can be performed while rotating the rotation effect filter even when the camera lens hood is mounted. [0004] For example, FIG. 12 is a partial cross-sectional view showing an example in which a polarization filter is used as a rotation effect filter. The polarizing filter X1 includes a movable frame 31 that supports a peripheral portion of the polarizing filter X1 formed in a disk shape, and a fixed frame 32 that supports the movable frame 31 rotatably around an optical axis. The fixed frame 32 is screwed into a male screw groove 33 formed on the outer peripheral surface thereof into a female screw groove 34 formed on the inner peripheral surface of the distal end portion of the lens barrel 30, so that the fixed frame 32 is fixed to the lens barrel 30. Attachment is possible, and when attached, the movable frame 31 is operated to rotate with respect to the fixed frame 22 so that the rotational position of the polarizing filter X1 around the optical axis can be adjusted arbitrarily. A camera lens hood Y1 is attached to the outer peripheral surface of the distal end of the lens barrel 30. As the attachment structure of the camera lens hood Y1, for example, a bayonet structure is used. As described above, the camera lens hood Y1 is provided with the polarizing filter X1 so as to enable the rotation operation of the polarizing filter X1, which is a kind of a rotation effect filter, even when the camera lens hood Y1 is attached. The outer diameter of the lens barrel 30 is formed sufficiently large relative to the outer diameter of the lens barrel 30 so as to secure a space around the X1 where a fingertip of a photographer can enter. Therefore, when performing photographing using the polarizing filter X1 using the camera lens hood Y1, as shown in FIG. 12, the photographer inserts a finger from the front opening of the camera lens hood Y1 and uses the polarizing filter with a fingertip. It becomes possible to rotate the movable frame 31 of X1 with respect to the lens barrel 30 by operating it. As shown in FIG. 13, an opening Y2a having a hole through 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. Has been proposed in which the rotation operation of the polarizing filter X1 is enabled by inserting. In the camera lens hood Y2, since a space for inserting a finger around the polarizing filter X1 is not secured, the diameter of the camera lens hood Y2 can be reduced, and the photographer's hand when adjusting the polarizing filter X1 can be used. It is possible to avoid blurring of the field of view in the viewfinder. [0007] In addition to the above-mentioned techniques, as a technique for easily operating a rotation effect filter with a camera lens hood attached, as disclosed in Japanese Patent Application Laid-Open No. H11-295780,
There has been proposed a technique in which an opening is provided in a camera lens hood, a lid member fitted to the opening is provided, the lid member is removed at the time of use, and the lid member is mounted again after adjustment. However, in the conventional camera lens hood Y1 shown in FIG. 12, when the photographer operates the polarizing filter X1 with one hand while looking through the viewfinder to check the subject. Since the hand inserted through the front opening of the camera lens hood Y1 blocks a part of the lens barrel 30, the finder field of view may be blurred, which is not preferable for checking the photographing screen. In order to secure a space for inserting a finger in the camera lens hood, the camera lens hood Y
The outer diameter of 1 is likely to be larger than the lens barrel 30. Further, as shown in FIGS. 12 and 13, there is a flower-shaped cut in the front part of the camera lens hood, which is called a flower shape, and has a front opening. In many cases, the shape shown in FIG. 3 is not suitable for preventing light from entering, and is fixed when it is attached to the lens barrel 30 side. May not be prevented. Therefore, in particular, many camera lens hoods are long in order to prevent light from entering, and many cannot be adjusted by inserting a finger. In addition, in this case, generally, in order to obtain an optimal position by rotating the polarizing filter to confirm the subject, a problem that a finger does not enter the camera lens hood occurs. After obtaining the optimum conditions, there is a trouble that the user needs to re-attach. Further, since light enters directly from the state where the camera lens hood is detached, the effect of the polarizing filter cannot be grasped, and it is a normal operation to finally attach the camera lens hood and see the result. In other words, it can be said that it is impossible to adjust the polarizing filter 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 view of the above point, the technique of FIG. 13 in which an opening is provided above the camera lens hood is different from the technique of FIG.
If a is present, light outside the angle of view is incident on the lens barrel 30 through the opening Y2a at the time of release, for example, when a finger is pulled out from the opening Y2a to actually perform photographing, and the camera lens The original function of the hood will be impaired. Japanese Patent Application Laid-Open No. H11-295780 (not shown), which attempts to solve these disadvantages, discloses a camera lens hood having a small opening or an opening formed in the hood so that the filter can be easily operated with a finger. Is provided, the lid member must be removed at the time of adjusting the rotation effect filter, and the lid member must be attached again after the adjustment, and the trouble of having to attach and detach the lid each time occurs.
In particular, since the opening area is required until the lid material is removed and the finger enters, even if the adjustment is performed with the finger inserted, the light always enters through the opening, so the rotation effect is required to enhance the shooting effect Although an attempt was made to make adjustments using a filter, satisfactory results were never obtained, so that it was of poor practicality. In addition, there are several types of camera lens hoods according to the lens diameter, and each time a dedicated mold must be made, the cost is high, and it is impossible to use existing camera lens hoods. there were. Therefore, means for solving these various problems described above while utilizing a conventional camera lens hood has been desired. The present invention has been made in view of these problems in the prior art, and in order to solve the problems, it is possible to easily turn the rotation effect filter while looking through the viewfinder with the camera lens hood mounted on the lens barrel. SUMMARY OF THE INVENTION An object of the present invention is to provide a camera lens rotation effect filter adjusting device to be mounted on a camera lens hood so that it can be operated, and to solve the above-mentioned drawbacks. In addition, the applicant has
To overcome the drawbacks of the prior art, Japanese Patent Application No. 2000-124984 has filed an application concerning a camera lens hood, but provides and uses a more effective device. As a result of various studies to solve the above problems, the above object can be effectively achieved by the present invention. That is, the apparatus for adjusting a rotation effect filter for a camera lens according to the present invention is an apparatus for adjusting a rotation effect filter such as a polarizing filter and a cross filter which are mounted on a camera lens and used. In order to easily operate a rotation effect filter mounted on the distal end of the lens barrel, the camera lens hood is mounted on a camera lens hood that can be detachably mounted on the lens barrel so as to surround the distal end. A detachable adjusting device is provided at any one of the circumferential positions of the above and at a position where the adjusting device is engaged with the rotating effect filter at an appropriate position. The adjusting device includes a rotating filter adjusting dial and the rotating filter adjusting device. Engage the rotating handle that drives the dial and the rotating filter adjustment dial with the rotating effect filter. And a rotary filter adjusting dial, the rotary filter adjusting dial being brought into contact with various rotary effect filters mounted on the tip of the lens barrel by the adjusting mobile dial, and then a rotary filter adjusting dial. By providing a rotary handle for rotating the rotary handle, by rotating the rotary handle to transmit rotation to the rotary filter adjustment dial, it was possible to easily adjust various rotary effect filters as a focus adjustment auxiliary member, Provide an adjustment device for the rotation effect filter for camera lens,
The various problems described above have been solved. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is directed to a camera lens hood, which can be easily operated with a rotation effect filter attached to the front end of a lens barrel, at any one of the circumferential portions of the camera lens hood. In addition, it is provided at a position where it can be engaged with the rotation effect filter at an appropriate position, and by applying it to any one of the so-called hood circumferential surfaces on the hood side surface or upper surface, work can be performed on any surface. is there. The device of the present invention
The present invention can be applied to an existing camera lens hood, and the camera lens hood may be formed with a groove for receiving a rotary dial and a hole for mounting a gantry. Also, it is only necessary to provide a new camera lens hood that is integrated from the beginning. Since the shape is sufficient to turn the dial and the handle with a finger, the shape of the hood is not limited, and therefore, it can be applied to various hoods such as a cylindrical shape and a flower shape. An embodiment of an apparatus for adjusting a rotation effect filter for a camera lens according to the present invention will be specifically described below with reference to the accompanying drawings of FIGS. FIG. 1 is an internal configuration diagram of a main part of the apparatus according to the first embodiment, which is attached to a camera lens hood attached to a lens barrel, before the rotary filter adjustment dial 3 is moved. FIG. 2 is an internal configuration diagram showing a state before the movement operation separated from the rotation effect filter 17, and FIG. 2 shows a state in which the rotation filter adjustment dial 3 is appropriately engaged with the rotation effect filter 17 and can be adjusted. As shown in each of these drawings, the component configuration is roughly divided into a configuration of an adjustment movement dial 2, a rotation filter adjustment dial 3, and a rotation handle 1. By rotating the adjustment movement dial 2, the rotation filter adjustment dial is rotated. 3 linearly moves so as to come into contact with the rotation effect filter 17. By rotating the rotary handle 1, the rotary filter adjustment dial 3, which is in contact with the rotary filter 1, transmits a rotary motion, and can rotate the rotary effect filter 17. The operation and operation will be described below with reference to FIGS. 1 and 2. The adjusting and moving dial 2 is connected to a fixed shaft 6, and the adjusting and moving dial 2 and the pinion 4 (small gear) are connected to the fixed shaft 6. The adjustment moving dial 2 and the pinion 4 are connected to each other, and the pinion 4 that is interlocked with the rotation of the adjustment moving dial 2 follows the linear tooth shape of the rack 5. Linear movement becomes possible. At this time, the rotary filter adjustment dial slide plate 13 orthogonal to the moving axis of the rack 5 is also provided.
(Hereinafter, simply referred to as a slide plate 13) is connected to the rack 5, and a fixed shaft 14 is connected to the slide plate 13,
The rotary filter adjustment dial 3 is attached to the fixed shaft 14. After the rotary filter adjustment dial 3 is brought into contact with the rotary effect filter 17 by the rotation of the adjustment moving dial 2, the rotary handle 1 is provided on the upper part of the gantry to provide a rotary operation for filter adjustment. A rotary shaft cylinder 8 is connected to the handle 1.
A rotary shaft 7 that moves through the internal cavity is inserted into the
Is connected to a pinion 11 for a rotating shaft. The rotating shaft cylinder 8 is provided with a rotating slide hole 9 for moving and stopping the rotating shaft 7 on the upper surface of the rotating shaft. The rotating shaft 7 is provided with an anti-spin / stop screw 10 protruding from the upper surface of the rotating shaft cylinder 8. When the rotating handle 1 is rotated while the slotted hole of the rotating slide hole 9 is moved and the rotating handle 1 is rotated, the rotating shaft cylinder 8 is prevented from idling and the rotating shaft 7 and the rotating shaft pinion 11 are simultaneously rotated. You. That is, the rotating force at this time is transmitted to the rotating shaft 7 by the idling prevention and stop screw 10. A rotating shaft pinion 11 connected to the rotating shaft 7 is engaged with a rotating gear 12 to transmit rotation from the rotating handle 1, and the rotating gear 12 is a fixed shaft passing through a slide plate 13. The rotation filter adjustment dial 3 is fixed to the fixed shaft 14 with the rotation filter adjustment dial 3 fixed to the fixed filter 14 and the rotation filter adjustment dial 3 and the rotation gear 1 at the same time.
2 is fixed. As a result, the rotation driving force of the rotary handle 1 is transmitted to the rotary shaft cylinder 8, and at the same time, the rotary gear 12 rotates while the rotary shaft pinion 11 connected to the rotary shaft 7 is engaged with the rotary gear 12,
The rotary filter adjustment dial 3 connected and fixed to the rotary gear 12 is rotated, and the rotary effect filter 17 engaged and engaged is rotated, so that various effect filters can be operated while looking through the camera finder. FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is a sectional view taken along line AA of FIG. FIG. 4 shows a sectional view of the relevant part in a state before the moving operation, which has been separated,
FIG. 5 is a sectional view taken along line BB, and FIG. 6 is a sectional view taken along line CC. 7 and 8 are second embodiment views showing the shape of the gantry assembly frame 15 when the diameter of the rotary gear 12 is increased, and are sectional views taken along the same arrows as in FIGS. 3 and 5, respectively. It is. FIG. 9 is a left front perspective view showing a state in which the rotary filter adjusting dial 3 is brought into contact with the rotary effect filter 17. FIG. 10 shows the rotary filter adjusting dial 3 separated from the rotary effect filter 17. FIG. 11 is a perspective view of the right rear perspective excluding the camera lens hood in a contact engagement state.
As shown in these figures, by providing the fixed shaft 14 and the slide plate 13 with the bearings 20, friction and backlash can be prevented. This also applies to the places where the shafts come into contact with the respective shafts. By providing a bearing or the like, a more stable rotational motion can be given. As for the stop of the moving distance, the moving distance can be maintained by the moving hole 19 of the slide plate 13 or stopped by the part where the gear cutting of the rack 5 has been completed. Since the moving distance can be controlled also by the anti-spin stop / stop screw 10, the transmission distance by the rotation of the adjustment moving dial 2 can be controlled in various places. As shown in FIGS. 9 and 10, the camera lens hood 18 is provided with an adjustment dial hole 21 at a position where it is engaged with the rotation effect filter 17 at an appropriate position, and the apparatus body is mounted. As a wearing method, the main body is fixed to the camera lens hood 18 with screws, or a knock pin is mounted on the main body base 16 and a knock pin hole is provided on the camera lens hood 18 side, or vice versa so that the apparatus main body can be attached and detached. be able to. Here, the attaching means of the main body device is not particularly limited, and an appropriate attaching means for attaching the camera lens hood 18 side to the main body side may be provided. Adjustment dial hole 2
1 is to form a hole in a range in which the rotary filter adjustment dial 3 can move smoothly. At this time, the role of light shielding is completely blocked by the gantry 16 and light is prevented from entering. In FIGS. 9 to 11, the rotary handle 1 has a dial-shaped knob and a knob. The knob to be stored (handle using a foldable knob)
1 may be used as long as the dial circumference can be turned directly by a finger or a palm. Therefore, all handles for transmitting rotation are included in the present invention. In addition, after being in contact with the rotation effect filter 17, a rubber ring is attached to the contact outer peripheral surface of the rotation filter adjustment dial 3 so that the rotation can be easily adjusted and closely contacted, thereby preventing slippage. In addition, since the movable frame of most of the polarizing filters is provided with a notch, the circumferential portion of the rotary filter adjusting dial 3 may be subjected to knurling (knurling) processing. May be made of a rubber material. Here, it is desirable to use a lightweight material for the entire apparatus of the present invention, but the material of the apparatus is not limited at all. Similarly to the above, by performing the same processing on the rotating handle 1 and the adjustment moving dial 2 which are the handles on the operation side, slip when rotating with a finger or a hand can be prevented, which is useful for fine adjustment. The range of movement of the rotary filter adjustment dial 3 varies substantially depending on the diameter and thickness of the camera lens hood and the rotation effect filter 17 attached to the lens barrel which is the lens diameter. Can be sufficiently compensated for from a small diameter to a large diameter with a moving distance of about 20 mm. Therefore, in the combination of the gears as shown in the embodiment, a gear having a small diameter is sufficient in consideration of the moving distance, and the weight can be reduced by using a gear made of a plastic resin material or the like. Further, the gear as the transmission means for movement is an example showing the present embodiment in each drawing, and it is possible to reduce the size by combining gears of appropriate shapes to perform movement transmission in the horizontal and vertical directions. It is desirable to transmit a smoother operation. In addition, as an example of the means for transmitting to the rotary filter adjustment dial 3 in the present embodiment, the transmission means using gears has been described, but the rotary filter adjustment dial 3 is provided from the rotary handle 1 and the adjustment moving dial 2.
Means for transmitting the movement and rotation is not limited to the method in the present embodiment, and a so-called cam that obtains the moving means according to the eccentric groove and transmits periodic linear motion to the follower by rotating motion. It can be transmitted in the same way by using the exercise of the movement. The present invention also includes that various rotation effect filters can be adjusted by motion transmission by each crank device such as a means using a ratchet mechanism. According to the apparatus for adjusting a rotation effect filter for a camera lens of the present invention, a circle of a camera lens hood is required to operate a component such as a polarizing filter attached to the tip of a lens barrel. It can be attached to any one of the peripheral parts, and at any position, the photographer can put his / her finger on each dial and turn while looking through the viewfinder. It is possible to check the mounting effect without removing, and it is possible to instantly find the point of the polarizing filter effect. In addition, light outside the angle of view is prevented from entering the lens barrel, and the inherent shading effect of the camera lens hood can be secured, making it extremely effective in achieving high-quality shooting with high shadow effects. It will be. In particular, the fact that the main apparatus of the present invention can be used by applying a mounting process to a conventional camera lens hood does not require a new camera lens hood to be easily erected. In addition, since the camera body is detachable and can be used while being replaced with another camera lens hood many times by removing the main body of the apparatus, unnecessary purchase can be avoided and a special economic effect can be achieved. As described above, the effect produced by the adjustment device for a rotation effect filter for a camera lens according to the present invention is enormous, and provides an excellent economic effect that is extremely practical and useful.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an internal configuration diagram showing a state before a moving operation in a state sufficiently separated from a rotation effect filter according to the first embodiment of the present invention. FIG. 2 is an internal configuration diagram showing a state of contact with a rotation effect filter in the embodiment. FIG. 3 is a cross-sectional view of a main part taken along line AA in FIG. 2; FIG. 4 is a sectional view of a main part viewed from the same arrow in a state before the movement operation in which the rotary filter adjustment dial 3 in FIG. 5 is a cross-sectional view of a main part taken along line BB in FIG. 2; FIG. 6 is a sectional view of a principal part taken along line CC in FIG. 2; FIG. 7 is a sectional view of a main part taken along line AA in the second embodiment. FIG. 8 is a cross-sectional view of a main part taken along line BB in the second embodiment. FIG. 9 is a left front perspective external view showing a state in contact with a rotation effect filter according to the first embodiment of the present invention. FIG. 10 is a left front perspective view showing a state in which the rotary effect filter 17 according to the first embodiment of the present invention is separated from the rotary effect filter 17; FIG. 11 is a right rear perspective external view of the first embodiment of the present invention excluding the camera lens hood in a contact engagement state with the camera lens hood. FIG. 12 is a partial cross-sectional view showing another conventional example 1. FIG. 13 is a partial cross-sectional view showing another conventional example 2. [Explanation of reference numerals] 1: Rotating handle 2: Adjustable moving dial 3: Rotating filter adjusting dial 4: Pinion 5: Rack 6: Fixed shaft 7: Rotating shaft 8: Rotating shaft cylinder 9: Rotating shaft slide hole 10: Rotating idle Prevention and stop screw 11: Pinion for rotating shaft 12: Rotating gear 13: Rotating filter adjustment dial slide plate 14: Fixed shaft 15: Mounting frame 16: Mounting base 17: Rotating effect filter 18: Camera lens hood 19: Moving hole 20: Bearing 21: Adjustment dial 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 screw groove 34: Female screw groove

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[Procedure for Amendment] [Date of Submission] October 5, 2001 (2001.10.
5) [Procedure amendment 1] [Document name to be amended] Description [Item name to be amended] 0024 [Correction method] Change [Details of amendment] As an example, the transmission means using gears has been described, but a rotary filter 1 and a rotary filter adjustment dial 3
Means for transmitting the movement and rotation is not limited to the method in the present embodiment, and a so-called cam that obtains the moving means according to the eccentric groove and transmits periodic linear motion to the follower by rotating motion. It can be transmitted in the same way by using the exercise of the movement. The present invention also includes that various rotation effect filters can be adjusted by motion transmission by each crank device such as a means using a ratchet mechanism. Especially the camera lens hood on the camera side
Rotating effect filter for camera lens with attached to
The mechanism of the device that enables operations such as
Although it is conceivable, attach the lens hood to the camera side.
The rotating device is directly attached to the lens hood while wearing
All means for rotating the rotation effect filter etc.
It is included in the present invention .

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 5/225 H04N 5/225 D

Claims (1)

Claims: 1. An apparatus for adjusting a rotation effect filter, such as a polarizing filter or a cross filter, mounted on a camera lens and used, surrounding a tip of a lens barrel of the camera. As described above, in order to easily operate the rotation effect filter attached to the distal end of the lens barrel with respect to the camera lens hood that can be detachably attached to the lens barrel, a circumferential portion of the camera lens hood is provided. A detachable adjusting device is provided at any one of the positions and at a position where the adjusting device is engaged with the rotating effect filter at an appropriate position. The adjusting device includes a rotating filter adjusting dial and a rotating device for driving the rotating filter adjusting dial. A handle and an adjustment movement dial for engaging the rotation filter adjustment dial with the rotation effect filter After the rotation filter adjustment dial is brought into contact with various rotation effect filters attached to the tip of the lens barrel by the adjustment movement dial, a rotation handle for rotating the rotation filter adjustment dial is provided. An apparatus for adjusting a rotary effect filter for a camera lens, wherein the rotary handle is rotated to transmit rotation to a rotary filter adjustment dial, and various rotary effect filters serving as a focus adjustment auxiliary member can be easily adjusted.