JP2001264853A - Filter adjustment camera lens hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter adjustment camera lens hood by which a rotational effect filter is easily operated by viewing through a finder in a state in which a camera lens hood is attached to a lens barrel part without spoiling the original function of the camera lens hood attached to the lens barrel of a camera. SOLUTION: This filter adjustment camera lens hood 30 attached to the lens barrel 20 of the camera is provided with an adjusting dial device at either one part of the circumferential part of the camera lens hood 30 so as to adjust a polarizing filter 31 attached at the top part of the lens barrel 20, and the adjusting dial device constitutes a rotary dial part and a frame part, and is provided with a light-shielding cover 6 which is freely attachable/detachable so as to cover an entire adjusting dial device, and the upper part of the light- shielding cover 6 is opened and the rotary dial part is projected, so that filter adjustment is attained in a cover attached state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens hood, and more particularly to a camera lens hood, which is used for a camera lens, and is used to prevent unwanted light from entering a lens, a finder, or a focus adjustment assisting member. About.

[0002]

2. Description of the Related Art Conventionally, a camera lens has been provided with a camera lens hood for blocking light from an area outside the angle of view of the camera, and is mounted on the tip of a lens barrel.
On the other hand, in order to enhance the photographing effect, various filters such as a polarizing filter and a cross filter are mounted on 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 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.

A filter called a rotation effect filter is used as a filter capable of changing a photographing effect by changing a rotation position around the optical axis.
In particular, since the color of the subject itself is faithfully reproduced as a filter for removing surface reflection of light, a polarizing filter (PL filter) or the like is employed as an indispensable element for landscape photography. When using a filter called an effect filter in a single-lens reflex camera, it is necessary to check the effect of the rotation effect filter with a finder, and as described above, attached to the tip of the lens barrel similarly to the rotation effect filter It is desirable that the camera lens hood is configured to be able to perform photographing while rotating the rotation effect filter even when the camera lens hood is mounted.

[0006] For example, FIG. 16 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 21 that supports a peripheral portion of the polarizing filter X1 formed in a disk shape, and a fixed frame 22 that supports the movable frame 21 rotatably around an optical axis. The fixed frame 22 is screwed into a male screw groove 23 formed on the outer peripheral surface thereof with a female screw groove 24 formed on the inner peripheral surface of the distal end portion of the lens barrel 20, so that the fixed frame 22 is fixed to the lens barrel 20. Attachment is possible, and when attached, the movable frame 21 is rotated with respect to the fixed frame 22 so that the rotation 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 20. 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 20 is sufficiently large relative to the outer diameter of the lens barrel 20 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. 16, the photographer inserts his / her finger through the front opening of the camera lens hood Y1 and uses the polarizing filter with his / her fingertip. The movable frame 21 of X1 can be operated to be rotated with respect to the lens barrel 20.

As shown in FIG. 17, 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. 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.

In addition to the above-mentioned techniques, as a technique for easily operating the rotation effect filter with the camera lens hood attached, as disclosed in Japanese Patent Application No. 10-104782,
A technique has been proposed 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.

[0008]

However, in the camera lens hood Y1 in FIG. 16, when the photographer operates the polarizing filter X1 with one hand while checking the subject by looking through the viewfinder, the camera lens hood Y1 is Since the hand inserted through the front opening blocks a part of the lens barrel 20, the finder field of view may be blurred, which is not preferable for checking the photographing screen. Further, the outer diameter of the camera lens hood Y1 is likely to be larger than the lens barrel 20 in order to secure a space for inserting a finger in the camera lens hood.

Further, as shown in FIGS. 16 and 17, there is a type called a flower shape, which is a flower shape cut at the front of the camera lens hood and has a front opening. In many cases, the shape of the figure cut to the extent that a finger enters to prevent it is inappropriate, and moreover, it is fixed when it is attached to the lens barrel 20 side. It may not be possible to prevent it. 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. Furthermore, since the light is directly invaded from the state where the camera lens hood is removed, 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 that the polarizing filter can be adjusted when wearing the camera lens hood to obtain satisfaction Met.

In view of the above, the technique of FIG. 17 in which an opening is provided above the camera lens hood, the opening Y
If 2 'is present, light outside the angle of view will be incident on the lens barrel 20 through the opening Y2' at the time of a release or the like in which a finger is pulled out from the opening Y2 'and actual shooting is performed. However, the original function of the camera lens hood will be impaired.

In Japanese Patent Application No. 10-104782 (not shown), which is a technique for solving these disadvantages, even if the outer shape of the camera lens hood is reduced or the filter can be easily operated with a finger. In addition, when adjusting the rotation effect filter, the lid member must be removed, and after the adjustment, the lid member must be mounted again, and the inconvenience of having to attach and detach the lid every time occurs. In addition, there are many types of camera lens hoods according to the lens aperture, and each time a special mold must be made, which increases the cost and makes it impossible to utilize existing camera lens hoods. Was. Therefore, there has been a demand for means for solving the above-mentioned various problems while utilizing the conventional camera lens hood.

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. An object of the present invention is to provide a camera lens hood for adjusting a filter that can be operated, and to solve the above-mentioned disadvantages.

[0013]

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 camera lens hood for filter adjustment according to the present invention is a camera lens hood that can be removably attached to the lens barrel so as to surround the distal end of the lens barrel of the camera. In order to easily operate a part mounted on the tip of the lens barrel, an adjusting dial device is provided at any one of circumferential positions of the camera lens hood, and the adjusting dial device includes a rotating dial unit. A mounting portion, and a detachable light-shielding cover for covering and hiding the whole of the adjusting dial device. The upper portion of the light-shielding cover is opened, and the rotary dial portion is protruded, so that the cover is mounted. It is characterized in that the filter can be adjusted more.

The rotary dial of the adjusting dial device is moved vertically and horizontally so as to engage with a component mounted on the tip of the lens barrel at an appropriate position.

Typically, the adjusting dial device comprises:
Parts that are detachable from the camera lens hood and mounted on the lens barrel include a rotation of a polarization filter, a cross filter, etc., which adjusts a rotation position around an optical axis to cause a difference in a photographing effect. An effect filter, wherein the rotary dial portion and the rotary effect filter are brought into contact with each other, and by rotating the rotary dial portion, the rotary effect filter can be engaged so as to rotate together. In addition, a filter lens camera hood for adjusting the rotational position of the rotary effect filter by applying a rubber ring or a concave and convex notch on the circumferential portion of the rotary dial is provided. Have solved the point.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The camera lens hood for filter adjustment of the present invention can be applied to an existing camera lens hood. The camera lens hood is formed with a groove for receiving a rotary dial and a hole for mounting a gantry. That is fine. Also, it is only necessary to provide a new camera lens hood that is integrated from the beginning. The rotary dial can be applied to various types of hoods, such as a cylindrical shape and a flower shape, because it is not necessary to stick to the outer shape of the hood because it is sufficient to engage the filter and turn the upper part of the dial with a finger. It is.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a camera lens hood for adjusting a filter according to the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a main part of a state in which a camera lens hood for filter adjustment according to a first embodiment of the present invention is attached to a lens barrel, and FIG. 2 shows an operation state of the apparatus of the present invention. FIG. 3 is a sectional view of a main part, and FIG. FIG.
A light-shielding cover 6 according to a second embodiment of the present invention.
FIG. 5 is a right side view of the embodiment, and FIG. 6 is a plan view of the embodiment. FIG. 7 is a front view showing a second embodiment of the present invention with a light shielding cover 6 attached thereto, FIG. 8 is a sectional view taken along the line AA of the same embodiment, and FIG. It is an external appearance perspective view of an example.

As shown in FIG. 1, the camera lens hood for filter adjustment of the present invention comprises a camera lens hood 30 provided with a dial insertion hole 8 and a mounting hole for a fixing screw 11, and an adjustment dial device. It has a dial rotating portion composed of a rotating shaft 3 and a movable spring 5 fixed to the rotating dial 1, a vertical adjusting shaft 9, a vertical adjusting male screw portion 9a, and a vertical adjusting knob 4 at an upper end. It consists of a gantry composed of an adjusting dial device main body 2 provided with an adjusting female screw portion 10. The vertical adjustment knob 4 is
The light-shielding cover 6 may be detachable from the vertical adjustment shaft 9 so as not to disturb the attachment and detachment of the light-shielding cover 6.

The polarizing filter 31 is composed of a movable frame 21 for supporting a peripheral portion of the polarizing filter 31 formed in a disk shape.
And a fixed frame 22 that supports the movable frame 21 so as to be rotatable around the optical axis. The fixed frame 22 has a male screw groove 23 formed on the outer peripheral surface thereof formed in the lens barrel 20. It can be attached to the lens barrel 20 by screwing into a female thread groove 24 formed on the inner peripheral surface of the distal end portion, and when it is attached, the movable frame 21 is operated to rotate with respect to the fixed frame 22. Thus, the rotation position of the polarization filter 31 around the optical axis can be adjusted arbitrarily. This figure shows a state in which the rotary dial 1 and the movable frame 21 for rotating the polarizing filter 31 are appropriately engaged with each other. In order to adjust so that the color of the object is faithfully reproduced while looking through the viewfinder, the photographer's finger is used. By rotating the rotary dial 1 at 15, the movable frame 21 rotates interlockingly, and the polarization can be adjusted.
Since the direction of rotation can be either left or right, the polarization point can be searched instantaneously.

Further, the rotary dial 1 is inserted into the dial insertion hole 8 provided in the camera lens hood 30 from above, and the adjustment dial device main body 2 is attached to the camera lens hood 30 with the fixing screw 11. At this time, in order to adjust the movable frame 21 and the rotary dial 1 in an appropriate position in the front-rear direction, the fixing screw 11 is attached.
Is provided, it is possible to cope with various polarization filters 31 attached to the lens barrel 20.

In the sectional view of the main part of FIG. 1, a rotary shaft 3 fixed to a rotary dial 1 is provided in a space 2a of the apparatus main body.
A movable spring 5 for pressing the rotating shaft 3 from above,
It has a vertical adjustment shaft 9 for vertically moving the rotary dial 1 interlocked with the rotary shaft 3 by variably pressurizing the movable spring 5 from above, and the vertical adjustment shaft 9 is adjusted by a vertical adjustment male screw portion 9a. By screwing up and down adjusting female screw part 10 provided on the upper surface of dial device main body 2
This indicates that the dial is moved up and down. At this time, when inserting the rotary dial 1, the width of the dial insertion hole 8 may be given a groove width with a margin in front and rear so as to correspond to various thicknesses of the polarization filter device. . Further, as shown in the figure, a state is shown in which a light-shielding cover 6 is covered so as to cover and cover the entire adjustment dial device in order to prevent light from entering through the dial insertion hole 8.

FIG. 1 is a sectional view of a main part showing one mode of use as an adjusting means of the polarizing filter 31, and the use form will be described in detail with reference to a sectional view of the main part showing an operation state of FIG.
As shown in FIG. 2, when the rotary dial 1 attaches the adjustment dial device main body 2 (hereinafter, referred to as “device main body 2”) to the camera lens hood 30, it appropriately engages with the movable frame 21 of the polarizing filter 31. In order to adjust the horizontal direction, that is, in the front-rear direction with respect to the lens barrel 20, the fixing screw 11 is used to secure the fixing barrel 11 using the moving groove width of the long hole of the mounting adjustment hole 7 formed in the apparatus main body 2. Will be. At this time, it is sufficient that the rotary dial 1 reaches a distance at which the rotary dial 1 can rotate with the movable frame 21.

Next, a vertical adjustment shaft 9 for pressing down the rotary shaft 3 fixed to the rotary dial 1 from above, and a vertical adjustment knob 4 at the upper end thereof are provided in the internal space 2a of the device main body 2 in the device main body. Rotate this up / down adjustment knob 4,
The vertically adjustable female screw 10 provided on the ceiling of the apparatus body 2 and the male screw 9a provided on the vertical adjustment shaft 9 are screwed together, and the movable spring 5 is pressed from the lower end of the vertical adjustment shaft 9. With such rotation, the pressing force is transmitted to the movable spring 5 and pushes the rotating shaft 3, whereby the rotary dial 1 is lowered. Also, by turning the vertical adjustment knob 4 in the direction opposite to the pressing direction,
The movable spring 5 acts to return upward, and the rotary shaft 3 is pushed up to raise the rotary dial 1. FIG. 3 shows the movement of the rotary dial 1 and the rotary shaft 3 and the expansion and contraction state of the movable spring 5. Here, in the present invention, the form of the movable spring added to the rotation axis is not particularly limited, and a leaf spring shape or a spring (spiral) may be used, and the rotation axis can be adjusted up and down. The mechanism is not particularly limited as long as the rotary dial 1 moves up and down and reaches the movable frame 21 so that it can be engaged with the movable frame 21 and rotated. Things.

Here, the dotted line portion of the dial rotating portion in FIG. 2 indicates the movement within the internal space 2a of the apparatus main body, and is used when attaching the filter adjusting camera lens hood of the present invention to the lens barrel 20. When the lens barrel 20 and the camera lens hood 30 are to be fitted, when the rotary dial 1 is lowered, it comes into contact with the movable frame 21 and a problem occurs. Therefore, the problem can be solved by raising the dial rotating portion.

Next, as shown in FIGS. 4 to 7 showing the second embodiment of the present invention, when the movable frame 21 and the rotary dial 1 are engaged with each other, a smooth rotation operation is transmitted. For example, by attaching a rubber ring to a circumferential portion of the rotary dial 1, slippage can be prevented. In addition, since the movable frame of most of the polarizing filters is provided with a notch, the circumferential portion of the rotary dial 1 may be subjected to knurling (knurling), and the material of the rotary dial 1 may be a rubber material. It may be. Here, it is desirable to use a lightweight material in the entire device of the present invention, but the material of the rotary dial 1 and other devices is not limited at all.

As is clear from the plan view in FIG. 6, the long holes of the mounting adjustment holes 7 formed in the apparatus main body 2 are formed to be somewhat longer in the moving direction so as to widen the adjustment range. I just need. Further, the horizontal movement is not limited to the processing using the long holes. For example, the apparatus main body 2 may be provided with a dial and moved by a gear slide by a rack and pinion method (not shown). This mechanism is not limited, and any mechanism that can be adjusted to reach the movable frame 21 for adjusting the polarization filter 31 by moving horizontally is included in the present invention.

FIG. 8 is a sectional view taken along line AA in a state where the light shielding cover 6 of FIG. 7 is mounted. The shapes shown in FIGS. 6 to 9 are one-sided or half-sided, but the appearance in the present invention is not necessarily limited to this shape, and as a result of an experiment, a design suitable for the appearance of the camera lens hood is obtained. It is desirable.

FIGS. 10 to 13 are external perspective views of the adjustment dial device showing a state where the light shielding cover 6 is removed. FIG. 14 is an external perspective view of the camera lens hood attached to the camera lens hood, and the light-shielding cover 6 is removed. FIG. 15 is attached to a cylindrical camera lens hood.
FIG. 4 is an external perspective view illustrating a state where a light shielding cover 6 is mounted.

The apparatus main body according to the present invention may be mounted on any one of the circumferential portions of the camera lens hood 30. In this case, the dial insertion hole 8 and the mounting hole for the rotary dial 1 to enter. As a method of simplifying attachment and detachment, a knock pin is embedded in the camera lens hood 30 side, a pin hole is processed so that the mounting portion of the apparatus main body 2 can insert the pin, and it is possible to move back and forth. It may be possible to perform a proper hole processing. Further, when the light-shielding cover 6 is mounted, the lower adjustment knob 4 is detachable from the vertical adjustment shaft 9, so that after the apparatus main body is mounted on the camera lens hood, the vertical adjustment knob 4 is removed. After the light-shielding cover 6 is attached so as to cover the vertical axis, the vertical adjustment knob 4 may be attached to the vertical adjustment shaft 9 again.

[0030]

According to the filter lens adjusting camera lens hood of the present invention, in order to operate a component such as a polarizing filter attached to the tip of the lens barrel, any one of the circumferential portions of the camera lens hood is required. Since the camera is equipped with an adjustment dial device, the photographer can turn his finger on the rotary dial while looking through the viewfinder at any position, and remove the camera lens hood each time the polarizing filter rotates. It is possible to check the mounting effect without the need, and it is possible to instantly find the point of the polarizing filter effect. In addition, it prevents light outside the angle of view from entering the lens barrel, ensuring the inherent light-blocking effect of the camera lens hood, and is extremely effective in achieving high-quality shooting with high shadow effects. It will be. In particular, the fact that the main device 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 it is detachable, it is possible to remove the apparatus main body and use it while replacing it with another camera lens hood many times, so that unnecessary purchase can be avoided and a special economic effect can be achieved. As described above, the effect produced by the camera lens hood for filter adjustment 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 a cross-sectional view of a main part in a state where a camera lens hood for filter adjustment according to a first embodiment of the present invention is attached to a lens barrel.

FIG. 2 is a sectional view of a main part showing an operation state of the device of the present invention.

FIG. 3 is a front view showing a moving state of a rotary dial.

FIG. 4 is a front view without a light-shielding cover according to a second embodiment of the present invention.

FIG. 5 is a right side view in FIG.

FIG. 6 is a plan view of FIG.

FIG. 7 is a front view showing a second embodiment of the present invention with a light shielding cover.

FIG. 8 is a sectional view taken along line AA in FIG. 7;

FIG. 9 is an external perspective view of FIG.

FIG. 10 is a perspective view of the adjusting dial device in a state where a light shielding cover is removed.

FIG. 11 is a perspective view of the adjustment dial device in a state where a light shielding cover is removed.

FIG. 12 is a perspective view of the adjustment dial device in a state where a light shielding cover is removed.

FIG. 13 is a perspective view of the adjusting dial device in a state where a light shielding cover is removed.

FIG. 14 is an external perspective view showing a state where the camera is attached to a camera lens hood and a light shielding cover is removed.

FIG. 15 is an external perspective view of a state in which the cover is attached to a cylindrical camera lens hood and a light-shielding cover is attached.

FIG. 16 is a partial cross-sectional view showing another conventional example 1.

FIG. 17 is a partial cross-sectional view showing another conventional example 2.

[Explanation of symbols]

1: Rotary dial 2: Adjustment dial device main body 2a: Device main body internal space 3: Rotation axis 4: Up / down adjustment knob 5: Movable spring 6: Light shielding cover 7: Mounting adjustment hole 8: Dial insertion hole 9: Vertical adjustment shaft 9a: Male screw part for vertical adjustment 10: Female screw part for vertical adjustment 11: Fixing screw 12: Rubber ring Y1: Camera lens hood Y2: Camera lens hood Y2a: Opening X1: Polarizing filter X2: Polarizing filter 20: Lens barrel 21 : Movable frame 22: Fixed frame 23: Male screw groove 24: Female screw groove 30: Camera lens hood 31: Polarizing filter

Claims (4)

[Claims] 1. A camera lens hood detachably attachable to a lens barrel so as to surround the tip of the lens barrel of the camera, wherein the camera lens hood has a tip attached to the lens barrel. In order to easily operate the mounted components, an adjusting dial device is provided at any one of the circumferential portions of the camera lens hood, and the adjusting dial device forms a rotary dial portion and a bridge portion, A light-shielding cover that is detachable for covering and hiding the whole of the adjusting dial device is provided. By opening an upper part of the light-shielding cover and projecting a rotary dial portion, a filter can be adjusted from a state where the cover is mounted. A camera lens hood for adjusting filters. 2. The apparatus according to claim 1, wherein the rotary dial portion of the adjusting dial device moves vertically and horizontally so as to engage with a component mounted on the tip of the lens barrel at an appropriate position. The camera lens hood for filter adjustment according to claim 1. 3. The camera lens hood for filter adjustment according to claim 1, wherein the adjustment dial device is detachable from the camera lens hood. 4. The component mounted on the lens barrel,
A rotation filter such as a polarization filter or a cross filter that adjusts the rotation position around the optical axis to cause a difference in a photographing effect, wherein the rotation dial filter and the rotation effect filter are brought into contact with each other, By rotating, the rotation effect filter can be engaged so as to rotate together, by applying a rubber ring or a concave and convex notch on the circumference of the rotary dial, the rotation effect filter 4. The camera lens hood for filter adjustment according to claim 1, wherein a rotation position of the filter is adjustable.