JPH1172841A - Supporter for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily couple a lens device with a camera main body in a supporter which supports a camera. SOLUTION: A rotating member 29 positioned on the outside of a tightening ring 28 and rotating together with the ring 28 is provided in this supporter 24 which supports the camera 21 constituted by coupling the lens device 22 with the camera main body 23 through a tightening ring 28. An operation knob 28a projecting from the outer periphery of the ring 28 is fit in a groove 29a formed on the inner peripheral surface of the member 29. A lever 29c provided on the outer periphery of the member 29 is visually confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera supporter for supporting, for example, a television camera formed by connecting a large-sized lens device and a portable camera body.

[0002]

2. Description of the Related Art In a conventional television camera of this type, it is possible to mount a lens device suitable for shooting conditions on a camera body, and these lens devices and the camera body have a coupling mechanism such as a bayonet mount. They are often connected via For example, as shown in a partially cutaway side view of FIG. 13, the lens device 1 and the camera body 2 are connected via a supporter 3. At this time, the upper portion 1a of the lens device 1 is hooked on the hook 4 of the supporter 3, and the lower portion 1b of the lens device 1 is fixed to the male screw 5 of the supporter 3 by the female screw 7 via the pressing member 6. The supporter 3 has a base 3a that comes into contact with the end face of the lens device 1, a hole 3b through which the flange portion 8 of the lens device 1 is inserted, and a rib 3c that protrudes from the periphery of the base 3a toward the camera body 2. I have.

[0003] The flange 8 of the lens device 1 and the tightening ring 9 of the camera body 2 are engaged with each other. As shown in a plan view of FIG. When driven by the finger F, the lens device 1 and the camera main body 2 are connected, and the camera main body 2 is fixed to the camera base 10 with the screws 11. Thereby, the lens device 1 and the camera body 2 are connected without adding the weight of the lens device 1 to the camera body 2.

On the other hand, since the operation knob 9a of the tightening ring 9 is groped and the finger F may be obstructed by the rib 3c of the supporter 3, as shown in the side view of FIG. A hole 12b similar to the rib 3 is provided in the base 12a, and a notch 12d is provided in a part of the rib 12c, so that the finger F is not obstructed by the rib 12c of the supporter 12 in some cases.

[0005] In general, the supporter 3 has a sectional shape as shown in Fig. 16, in which the width of the base 3a is 241mm, its thickness is 6mm, and the diameter of the hole 3b is 80mm. The height of the rib 3c including the base 3a is 40 mm, and its thickness is 5 mm. And the cross-sectional area is 1310m
m ² , the minimum extremum of the section modulus calculated from the principal moment of inertia of the area, that is, the extremum of the area moment of inertia, is 4150 m ³
It has been.

On the other hand, the supporter 12 has a sectional shape as shown in FIG. 17, and the base 12a has a width of 241 mm and a thickness of 10 m.
m, and the diameter of the hole 12b is 80 mm. The height of the rib 12c including the base 12a is 40 mm,
The thickness of c and 12e is 5 mm. Further, holes 12
The distance from the center of b to the rib 12e is 75 mm. The sectional area is 1900 mm ² , and the minimum extreme value of the section modulus is 3920 m ³ .

[0007]

However, in the conventional example shown in FIG. 15, the thickness t of the base 12a of the supporter 12 is reduced in order to prevent the strength of the supporter 12 from being reduced by the provision of the notch 12d. 6mm to 1
It is thickened to 0 mm. For this reason, the gap D into which the finger F enters
And the operation of the tightening ring 9 becomes difficult, and the weight of the supporter 12 increases to make the television camera difficult to handle.

An object of the present invention is to solve the above-mentioned problems,
It is an object of the present invention to provide a camera supporter that can easily connect a lens device and a camera body.

[0009]

According to the present invention, there is provided a camera supporter for supporting a camera, comprising a lens device and a camera body connected by a fastening ring. A rotating member is provided outside the attachment ring and rotates together with the fastening ring.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a plan view of the first embodiment shown with a camera 21 with a part cut away, and FIG. 2 is a cross-sectional view of FIG. 1 taken along line AA.
1 is formed by connecting a lens device 22 and a camera body 23,
It is supported by the supporter 24. A flange 26 is provided on the bayonet mount 25 of the lens device 22, and a fastening ring 28 having an operation knob 28a is screwed into a bayonet mount 27 of the camera body 23.

The supporter 24 is provided with a strength for supporting the weight of the camera 21, and is provided with a base 24 a that comes into contact with an end surface 22 a of the lens device 22. A hole 24b through which the mount 25 of the lens device 22 is inserted is formed in the center of the base 24a, and a rib 24c protruding toward the camera body 23 is provided on the outer periphery of the base 24a.

Here, the base 24a of the supporter 24 has
An annular rotating member 29 that fits around the outer periphery of the tightening ring 28,
It is rotatably mounted via an annular holding member 30. A groove 29a for receiving the operation knob 28a of the tightening ring 28 is provided on the inner peripheral surface of the rotating member 29, and a flange portion 29b is formed on the outer periphery of the rotating member 29 on the side of the lens device 22.
And a lever 29c is provided on the outer periphery of the rotating member 29 on the camera body 23 side. And the rotating member 2
9 is held between the supporter 24 and the holding member 30 and the holding member 30 is fixed to the supporter 24, whereby the rotating member 29 is rotatably supported by the supporter 24.

With this configuration, when the lens device 22 and the camera body 23 are connected, the lever 26 of the rotating member 29 is engaged after the flange portion 26 of the lens device 22 and the tightening ring 28 of the camera body 23 are engaged. 29c is visually confirmed and operated with the finger F. Accordingly, the rotation member 29 rotates and the tightening ring 28 rotates via the operation knob 28a. The tightening ring 28 connects the flange 26 of the lens device 22 to the bayonet mount 2 of the camera body 23.
7, the lens device 22 and the camera body 23 are connected.

In the first embodiment, since the rotating member 29 which fits on the outer circumference of the tightening ring 28 and rotates together with the tightening ring 28 is provided, the lever 29c of the rotating member 29 can be visually confirmed and operated. Therefore, the operation knob 28a
And the finger F
Can be prevented from being obstructed by the rib 24c of the supporter 24, and the lens device 22 and the camera body 23 can be easily coupled.

Therefore, the lens device 22 and the camera body 23
Can be connected in a short time, the installation cost can be reduced by reducing time and personnel, and the combination of the lens device 22 and the camera body 23 can be easily performed according to the shooting conditions, and the image quality of the camera 21 can be improved. Can be done.

FIG. 3 is a sectional view of the second embodiment, and FIG.
A fastening ring 31 and a rotating member 32 different from those of the first embodiment are provided. On the outer peripheral surface of the tightening ring 31, a number of spherical concave portions 31b are formed in addition to the operation knob 31a similar to that of the first embodiment. Further, in addition to the groove 32a similar to that of the first embodiment, at least one spherical convex portion 32b that fits into the concave portion 31b of the tightening ring 31 is formed on the inner peripheral surface of the rotating member 32. A flange 32c and a lever 32d similar to those of the first embodiment are formed on the outer peripheral surface of the member 32. It is preferable that the number of the protrusions 32b of the rotating member 32 is larger.

In the second embodiment, the same effects as those of the first embodiment can be obtained, and the concave portion 31b of the tightening ring 31 and the convex portion 32b of the rotating member 32 are fitted.
A large rotating torque can be transmitted from the rotating member 32 to the tightening ring 31, and the operation knob 31a can be prevented from being bent or damaged.

FIG. 4 is a sectional view of the third embodiment, and FIG.
A fastening ring 33 and a rotating member 34 different from those of the first embodiment are provided. On the outer peripheral surface of the tightening ring 33, one concave portion 33b is formed in addition to the operation knob 33a similar to that of the first embodiment. In addition, the first peripheral surface of the rotating member 34
In addition to the groove 34a similar to that of the first embodiment, a convex portion 34b that fits into the concave portion 33b of the tightening ring 33 is formed, and the outer peripheral surface of the rotating member 34 has the same flange portion 34 as that of the first embodiment.
c and a lever 34d are formed. Further, the inner peripheral surface of the concave portion 33b of the tightening ring 33 and the convex portion 34b of the rotating member 34
A gap is provided between the outer peripheral surfaces of the rotating members 34, so that the rotating member 34 can rattle against the tightening ring 33.

In the third embodiment, the same effects as those of the first and second embodiments can be obtained, and the inner peripheral surface of the concave portion 33b of the tightening ring and the outer peripheral surface of the convex portion 34b of the rotating member 34 can be obtained. Since there is a gap between the surfaces, the tightening ring 3
3 and the rotating member 34 can be fitted smoothly.

FIG. 5 is a partially cutaway plan view of the fourth embodiment shown together with the camera 21, and FIG. 6 is a rear view of the supporter 41. The rotating member 29 and the holding member 30 of the first embodiment are omitted. Instead, the supporter 41 is different from the supporter 24 of the first embodiment. The supporter 41 is given a strength for supporting the weight of the camera 21, and the end face 22 of the lens device 22 is provided.
A base 41a that abuts on a is provided. Base 41a
A hole 41b through which the mount 25 of the lens device 22 is inserted is formed in the center of
A rib 41c protruding to the third side is provided.

The rib 41c of the supporter 41 has
A cutout portion 41d having a height D 'is formed on the operation knob 28a side, and a reinforcing portion 41e having, for example, a U-shaped cross section is formed on the opposite side of the operation knob 28a to reinforce the strength. It is provided at a position symmetrical to the axis. In the reinforcing portion 41e, the end portion of the rib 41c extends from the end portion of the rib 41c to the optical axis side substantially perpendicularly to the optical axis.
A vertical portion 41f which is substantially parallel to 2a;
A parallel portion 41g is provided from the lower portion of f toward the base 41a in a direction substantially parallel to the rib 41c, and the portion between the rib 41c and the parallel portion 41g is omitted in the base 41a.

Here, the supporter 41 has a cross-sectional shape as shown in FIG. 7, the base 41a has a width of 241 mm, its thickness is 6 mm, and the diameter of the hole 41b is 80 mm.
The height of the rib 41c including the base 41a is 30 mm,
Its thickness is 5 mm together with the reinforcing portion 41e. The sectional area is 1200 mm ² , and the minimum extreme value of the section modulus is 4020 mm ³ . The minimum extremum of the section modulus is calculated from the principal moment of inertia of the area, that is, the extremum of the area moment of inertia.

In the fourth embodiment, it is the bending moment that is a problem in strength in the supporter 41. Generally, the bending stress σ, the applied moment M and the section modulus Z are σ = M. / Z is satisfied, the supporter 41 is configured as shown in FIG.
6, the same strength as the supporters 3 and 12 of the conventional example shown in FIG.

Further, the base 41a of the supporter 41 is
In addition to being thinner than the base 12a of the supporter 12 of the conventional example shown in FIG. 1, the height D 'of the notch 41d can be increased. Therefore, the operation space can be widened, the position of the operation knob 28a of the tightening ring 28 can be easily confirmed, and the operability can be improved.

Further, the cross-sectional area A of the supporter 41 is 6
Since it is about 5%, the weight can be reduced, and the handling at the time of shooting can be improved. In addition, since it is not necessary to provide the rotating members 29, 32, and 34 of the first to third embodiments, the manufacturing cost can be reduced.

8 to 1 in place of the supporter 41.
The supporters 42 to 46 having a sectional shape as shown in FIG.
Bases 42a to 46a, holes 42b to 46b, ribs 42c to 46c, notches 42d to 46d, and a reinforcement 42
e to 46e are provided.

[0027]

As described above, the supporter of the camera according to the present invention is provided with the rotating member which is located outside the tightening ring and rotates together with the tightening ring. By doing so, the tightening ring can be tightened, and the lens device and the camera body can be easily connected.

A notch is provided in the rib located on the operation knob side of the tightening ring, and a portion extending in a direction substantially orthogonal to the optical axis is provided in the rib positioned symmetrically to the notch with the optical axis interposed therebetween. If this is the case, it is possible to contribute to weight reduction, and it is possible to improve the handling during shooting.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a first embodiment shown together with a camera.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view of a second embodiment.

FIG. 4 is a sectional view of a third embodiment.

FIG. 5 is a partially cutaway plan view of a fourth embodiment shown together with a camera.

FIG. 6 is a rear view.

FIG. 7 is a sectional view.

FIG. 8 is a sectional view of a modification.

FIG. 9 is a sectional view of a modification.

FIG. 10 is a sectional view of a modification.

FIG. 11 is a sectional view of a modification.

FIG. 12 is a sectional view of a modification.

FIG. 13 is a partially cutaway side view shown together with a conventional camera.

FIG. 14 is a partially cutaway plan view.

FIG. 15 is a side view shown together with another conventional camera.

FIG. 16 is a sectional view of a conventional example.

FIG. 17 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Camera 22 Lens apparatus 23 Camera main body 24, 41-46 Supporter 26 Flange part 28, 31, 33 Tightening ring 28a, 31a, 33a Operation knob 29, 32, 34 Rotating member 29c, 32d, 34d Lever 41e-46e Reinforcing part

Claims (6)

[Claims] 1. A camera supporter for supporting a camera comprising a lens device and a camera body connected by a tightening ring, wherein a rotating member is provided outside the tightening ring and rotates together with the tightening ring. A camera supporter characterized in that: 2. The camera supporter according to claim 1, wherein the rotating member is fitted with play to the tightening ring. 3. The camera supporter according to claim 1, wherein an operation knob protruding from an outer periphery of the tightening ring is fitted into a groove formed on an inner peripheral surface of the rotating member. 4. A concave or convex portion is provided on an outer peripheral surface of the tightening ring, and a convex or concave portion is provided on an inner peripheral surface of the rotating member so as to enter the concave or convex portion of the tightening ring. Supporter of the camera described in 1. 5. The camera supporter according to claim 4, wherein the concave portion or the convex portion has a spherical shape or a rectangular shape. 6. A notch is provided in a rib located on the operation knob side of the tightening ring, and a rib extending symmetrically to the notch with the optical axis interposed therebetween extends in a direction substantially orthogonal to the optical axis. The camera supporter according to claim 1, further comprising: