JP2002303928A - Adapter for attaching camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adapter for attaching a camera by which attaching supporting form to the tripod or the like of the camera is freely changed even in both a long sideways direction and a vertically long direction in the case of photographing. SOLUTION: An arm for moving a camera 4 is erectly provided to freely tilt and rise at base end of a horizontal base for fixing 1. Then, a base frame for attaching a camera 6 constituted by perpendicularly forming a base plate part for attaching a camera 6b at the leading edge of a plate part for supporting 6a is pivotally attached to rotate and move by 180 deg. near to the end of the arm 4. Thus, the camera is rotated by 90 deg. centering around the optical axis line of a lens.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera mounting system in which a photographer can freely change the composition of a camera mounted on a tripod or the like in any of a horizontal direction and a vertical direction. For adapter.

[0002]

2. Description of the Related Art Conventionally, a camera is mounted using a camera mounting base as shown in FIG. As shown in FIG. 6, the camera mounting base has a movable base part c pivotally attached to a rising piece b of a base frame part a via a pivot d at a side edge thereof. It was equipped with. Then, the camera mounting table A
Is usually mounted on the top of the tripod B as shown in FIG.

[0003]

In the conventional camera mounting table A as described above, the camera C mounted in the horizontal direction as shown by a solid line in FIG. When the lens is displaced to the position (1), the position of the lens necessarily moves sideways as the camera rotates.

By the way, when taking a picture, it is better to set the focus of the camera on the subject, and in this state, rotate the camera in the vertical or horizontal direction to make the finished photo horizontal. In some cases, it is necessary to make a compositional selection as to whether or not it should be vertically long.
That is, a general film has a horizontally long shape, and therefore, whether it is used horizontally or vertically is
This is because the composition of the photograph is determined based on the supporting form of the camera.

On the other hand, in photography using a tripod,
With the focus on the subject, there is a case where the compositional selection of whether the photograph should be landscape or portrait should be made visually while looking through the viewfinder.

However, in the case of the conventional camera mounting table A, as described above, the position of the lens also moves laterally with the rotation of the camera (see FIG. 6). When the camera that has been focused on the camera is rotated in the vertical direction, the optical axis position of the lens is shifted, so that adjustment for centering the subject must be performed. That is, each time the camera is moved from the horizontal position to the vertical position, the composition must be adjusted. In addition, in the case of a camera that does not have an autofocus function, if such a position movement is performed, the focus will be deviated, so that there is a problem that it is necessary to focus on each movement. became.

The present invention has been made to provide a new technique called a camera mounting adapter which solves such a conventional problem.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a camera moving arm 4 is erected at the base end of a horizontal fixing base 1 for mounting to a fixing device such as a tripod. A fixing means for fixing the arm 4 in a horizontal state and a vertical state is provided, and a camera mounting base frame 6 formed by forming a camera mounting base plate part 6b at a right angle on a leading edge of the supporting plate part 6a. Near the distal end of the camera moving arm 4, at the base end center position of the supporting plate portion 6a, the camera mounting base frame 6 is attached to the arm 4 in the vertical state.
Is pivotally mounted so that it can be rotated 180 degrees symmetrically and provided with fixing means for fixing at both extreme points of the 180 degrees, whereby the camera can be rotated 90 degrees around the optical axis of the lens. It can be rotated by degrees. "

The dimensional conditions according to the present invention are as follows: the length from the pivot point 5 of the camera moving arm 4 to the pivot point 7 of the camera mounting frame 6, and the camera mounting frame 6;
Of the length of the supporting plate 6a (distance from the pivot point to the camera mounting plate 6b) is set to "the camera can rotate around the optical axis of the lens". The dimensions are set so as to satisfy Specifically, as shown in FIG. 1, the length S from the center of the pivot point 5 of the camera moving arm 4 to the center of the pivot point 7 of the camera mounting underframe 6 and the camera mounting arm The dimension T obtained by adding the length T1 from the top surface of the supporting plate portion 6a to the center of the pivot point 7 thereof to the length T2 from the bottom surface of the camera M to the center of the lens in the underframe 6 becomes equal. It is important to set up. That is, it is important to set the dimensions so that the mathematical expression of S = T = (T1 + T2) holds.

The present invention has solved the conventional problems based on the adoption of the above-described configuration.

[0011]

The camera M is mounted on the camera mounting frame 6 with the camera moving arm 4 parallel to the horizontal fixing base 1 as shown in FIG. In this state (the state shown in FIG. 1), an image is taken by the camera in the horizontally long state.

Next, when it is desired to convert the camera into a vertically long state, the latching pin 4a is pulled out from the first locking hole 2a to release the locking, and the camera moving arm 4 is raised vertically. . Thereafter, the arm 4 can be stabilized in a rising state by projecting the latching pin 4a into the second locking hole 2b (see FIG. 4).

In the above state, the camera mounting underframe 6 is rotated by 180 degrees as indicated by the arrow in FIG. 4 and the locking projection pin 4b is pushed into the second locking hole 2b, so that the camera is mounted. The mounting frame 6 is rotated and moved to the position shown in FIG. 5, and the camera M is converted to a vertically long state.

The center of the lens of the camera M in the state converted to the vertically long state is the same as the center position of the lens in the horizontally long state because the rotation of the camera is performed about the optical axis of the lens. Position. Therefore, even if the camera M is focused in a landscape orientation and the camera is turned vertically in relation to the composition, the center position of the lens does not change, so that the subject can always be positioned at the center. Since there is no defocus, there is no need to perform focusing again.

[0015]

1 to 3 show a state in which an adapter for mounting a camera according to the present invention is set so that the camera is mounted in a horizontally long state. The camera is fixed in a form shown by a chain line in FIG.

In FIG. 1, reference numeral 1 denotes a horizontal fixing base, which is for securely attaching to a fixing device such as a tripod. Reference numeral 2 denotes a front side pivot support piece erected on one end side of the fixing horizontal base 1, 3 denotes a rear side support piece, and the two pivot support pieces 2, 3 are kept at a predetermined interval. They are erected so as to face each other.

Reference numeral 4 denotes a camera moving arm. The arm 4 is pivotally supported at its base end via a pivot shaft 5 with respect to the front and rear pivot pieces 2 and 3 via a pivot shaft 5. Have been.

Reference numerals 2a and 2b denote first and second locking holes provided on the inner surface side of the front pivoting piece 2, respectively, for holding the camera moving arm 4 in one of a horizontal state and a vertical state. It is for fixing in position. Reference numeral 4a denotes a locking and retracting pin provided on the back side of the camera moving arm 4,
When the pin 4a is inserted into the first locking hole 2a, the arm 4 is fixed in a horizontal state (the state shown in FIGS. 1 to 3).

Then, the camera moving arm 4 is raised in a state in which the locking by the pin 4a is released, and then the locking retracting pin 4a is pushed into the second locking hole 2b. , The arm 4 is fixed in a vertical state (the state shown in FIGS. 4 and 5).

A spring (not shown) is attached to the latching pin 4a so that the spring can stabilize the locking holes 2a and 2b in the state of being inserted. It is configured to apply force.

Reference numeral 6 denotes a camera mounting base frame which has a form in which a camera mounting base plate portion 6b is bent at a right angle to a leading edge of a supporting plate portion 6a. The frame 6 is rotatably pivotally connected to the center of the other end of the camera moving arm 4 via the pivot 7 at the center of the base edge of the supporting plate 6a. I have. Also,
The camera mounting frame 6 is configured to support the camera M in a form that receives the camera M at the base plate portion 6b. That is, the camera is configured to be supported in a state where there is no support member on the back side of the camera and around the lens barrel. This not only causes no obstruction to the viewfinder, but also attaches a camera with a built-in “operational mechanism”, “LCD monitor for displaying photographed data, etc.” to the camera back cover. However, since there is no dying member on the rear side, there is no inconsistency in these operations. Further, the opening / closing operation of the back cover for taking in / out the film can be performed with the camera attached.

Reference numerals 6c and 6d denote first and second locking holes provided on the inner surface side of the camera mounting underframe 6, respectively.
When the camera mounting underframe 6 is symmetrically rotated by 180 degrees from one side of the arm to the other side (from left to right in FIG. 4) in a rising state of the camera moving arm 4, This is for fixing the symmetrical state at the extreme positions.

Reference numeral 4b denotes a locking and retracting pin provided on the back side of the camera moving arm 4, and when the pin 4b protrudes into the first locking hole 6c, the camera mounting base frame 6 is provided.
Is fixed in a state where the camera is placed horizontally (horizontally long) (the state shown in FIGS. 1 to 3).

Then, when the arm 4 is raised, the camera mounting frame 6 is rotated by 180 degrees, and the latching pin 4b is pushed into the second locking hole 6d, as shown in FIG. Then, the camera mounting underframe 6 is fixed at a position where the camera is rotated in a state where the camera is placed vertically (vertically long).

Incidentally, it is important that such a 180-degree rotation of the camera mounting underframe 6 be symmetrical in the left-right direction. Therefore, it is important that the pivoting position by the pivot 7 is pivotally attached at the center of the base edge of the supporting plate 6a and at the center of the other end of the camera moving arm 4 as described above. And the pivot is at least one
It is an absolute requirement to pivot so that an 80 degree rotation is allowed.

When the camera M is mounted on the camera mounting frame 6 with the camera moving arm 4 parallel to the fixing horizontal base 1 as shown in FIG. Photographing in the composition of the state is performed.

In this state, when it is desired to convert the camera into a vertically long state, the locking projection pin 4a is moved to the first position.
It is pulled out from the locking hole 2a to release the locking, and the camera moving arm 4 is raised vertically.
After that, the arm 4 can be stabilized in the vertical state by projecting the latching pin 4a into the second locking hole 2b (see FIG. 4).

In the above state, the camera mounting underframe 6 is rotated by 180 degrees as indicated by the arrow in FIG. 4 and the locking projection pin 4b is pushed into the second locking hole 6d, whereby the camera is mounted. The mounting frame 6 is rotated and moved to the position shown in FIG. 5, and the camera M is converted to a vertically long state.
Therefore, in this state, photographing in a vertically long composition is performed.

At this time, the center of the lens of the camera M is at the same position as the center of the lens in the horizontally long state. Therefore, even if the camera M is focused in the landscape state and the camera is changed to the portrait state in view of the composition, since the center position of the lens does not change, the composition in which the subject is located in the center position is maintained. . At the same time, there is no defocus, so there is no need to perform focusing again.

In order to rotate the camera so as not to move the center of the lens, the camera needs to rotate around the center of the lens, that is, the optical axis of the lens.

For this purpose, the dimensional conditions in the present invention are as follows: the length from the pivot point 5 of the camera moving arm 4 to the pivot point 7 of the camera mounting frame 6, and the camera mounting frame. The setting of the length dimension (distance dimension from the pivot point to the camera mounting plate section 6b) of the supporting plate section 6a at 6
The dimensions are set so as to satisfy the condition that the camera can rotate around the optical axis of the lens. Specifically, as shown in FIG. 1, the length S from the center of the pivot point 5 of the camera moving arm 4 to the center of the pivot point 7 of the camera mounting underframe 6 and the camera mounting arm The dimension T obtained by adding the length T1 from the top surface of the supporting plate portion 6a to the center of the pivot point 7 thereof to the length T2 from the bottom surface of the camera M to the center of the lens in the underframe 6 becomes equal. It is important to set up. That is, S = T = (T1 + T2)
It is important to set the dimensions so that the following equation is satisfied.

[0032]

According to the present invention, a structure as described in claim 1 is provided.
That is, an arm 4 for camera movement is erected at the base end of a horizontal base 1 for fixing to a fixing device such as a tripod, and the arm 4 is fixed in a horizontal state and a vertical state. A camera mounting base frame 6 formed by forming a camera mounting base plate portion 6b at a right angle on the front end edge of the support plate portion 6a is provided near the front end of the camera moving arm 4. At the base center position of the supporting plate portion 6a, the camera mounting frame 6 is pivotally attached to the vertical arm 4 so that the camera mounting frame 6 can be rotated 180 degrees symmetrically to the left and right. The fixing means for fixing at the two extreme points is provided, so that the camera can be rotated around the optical axis of the lens. Vertically Even if transferred, or off-center of the subject is the lens, there is no it or gone out of focus.

Therefore, when the camera is rotated from the horizontal direction to the vertical direction, which occurs when the conventional camera mounting table A as shown in FIG. 6 is used, the subject is previously aligned with the center of the viewfinder. However, the subject may be located in an unnatural state due to the movement of the lens, or may be out of the viewfinder in extreme cases, and may be out of focus due to the movement of the lens. The problem that re-focusing is required is completely eliminated according to the present invention.

The present invention is configured as described in claim 2, that is, the length from the pivot point of the camera moving arm 4 to the pivot point of the camera mounting frame 6, and the camera mounting frame 6 The setting of the length dimension (distance dimension from the pivot point to the camera mounting plate section 6b) of the supporting plate section 6a in
Since the dimensions are set so as to satisfy the condition that "the camera can rotate around the optical axis of the lens", it is extremely reasonable and easy to achieve the condition.

According to a third aspect of the present invention, there is provided a camera having a structure in which the support of the camera is fixed in such a form that there is no support member on the rear side and around the lens barrel. Not only does not cause any obstruction when looking through the viewfinder, but even if a camera with a built-in "operational mechanism" or "LCD monitor for displaying shooting data" is attached to the back of the camera, Since there is no die member on the side, there is no inconsistency in these operations. Further, the opening / closing operation of the back cover for taking in / out the film is also performed with the camera attached.

[Brief description of the drawings]

FIG. 1 is a front view of the present invention in a state where a camera is supported in a horizontally long state.

FIG. 2 is a plan view of the present invention in a state where the camera is supported in a horizontally long state.

FIG. 3 is a rear view of the present invention in a state where the camera is supported in a landscape state.

FIG. 4 is a front view showing the present invention in a state where the support of the camera is being shifted to a vertically long state.

FIG. 5 is a front view showing the present invention in a state where the camera is supported in a vertically long direction.

FIG. 6 is an explanatory front view showing a form of supporting a camera by a conventional camera mounting base A;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing horizontal base 2 Front side pivot support piece 2a 1st locking hole 2b 2nd locking hole 3 Rear side support piece 4 Camera moving arm 4a Hanging pin 4b Hanging pin 5 pivot Support shaft 6 Camera mounting base frame 6a Supporting plate 6b Camera mounting base plate 6c First locking hole for position stop 6d Second locking hole for position stop 7 Axis M Camera A Camera mounting base

Claims (3)

[Claims] 1. A camera moving arm (4) is erected at the base end of a horizontal fixing base (1) for mounting to a fixing device such as a tripod, and the arm (4) is erected. Fixing means for fixing the camera in a horizontal state and a vertical state, and a camera mounting base plate (6b) formed at a right angle on a leading edge of the supporting plate (6a). (6) near the front end of the camera moving arm (4) at the base center position of the supporting plate (6a);
To pivotally mount the camera mounting frame (6) to the vertical arm (4) so as to be able to rotate 180 degrees symmetrically to the left and right, and to fix the camera mounting frame (6) at the two extreme points of the 180 degrees. An adapter for mounting a camera, the fixing means being provided so that the camera can be rotated by 90 degrees about the optical axis of the lens. 2. The length from the center of the pivot point (5) of the camera moving arm (4) to the center of the pivot point (7) of the camera mounting frame (6), and the camera mounting frame (6). ), The setting of the length dimension (distance dimension from the pivot point to the camera mounting plate section 6b) of the supporting plate section (6a) is set to "the camera can rotate around the optical axis of the lens". The camera mounting adapter according to claim 1, wherein the dimensions are set so as to satisfy the following condition. 3. The camera mounting adapter according to claim 1, wherein the support of the camera is fixed such that no support member is present on the rear side and around the lens barrel.