JPH07225424A - Fitting structure for lens - Google Patents

Abstract

PURPOSE:To facilitate the fitting of a lens on the side of a camera by providing a guide member guiding an engaging part on the side of the lens to a lens engaging part on the side of the camera at least either the side of the camera (lens supporter side) or the side of the lens and engaging the lens along the guide plate. CONSTITUTION:The lens 18 is inclined upward, and the upper end part 20A of the mount 20 of the lens 18 is inserted between the guide plates 50, and the upper end part 20A abuts on a lens fitting surface 38 at the upper side of the engaging plate 40 of a lens supporter 14. When both-side surfaces 18A of the lens 18 is guided by the guide plates 50 and the lens 18 is lowered along the guide plates 50, the engaging plate 40 is immersed in the recessed part 26 of the mount 20 and the hooks 44 of the engaging plate 40 are hooked on the hooks 32 of the engaging plate. When the front part of the lens 18 is inclined downward and the lens 18 is gradually made to be horizontal, the tapered surface 42 of the hook 44 starts to be engaged with the tapered surface 30 of the hook 32, and then the tapered surfaces 30 and 42 are completely engaged with each other and a positioning pin 34 is engaged with the groove 46 of the engaging plate 40 at the point of the time of making the lens horizontal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens mounting structure, and more particularly, to mounting a so-called box-shaped lens such as a lens for EFP (electric field production) on a TV camera fixed to a tripod or a lens supporter. The present invention relates to a lens mounting structure.

[0002]

2. Description of the Related Art As shown in FIG. 7, when a box lens 1 of a heavy object such as an EFP lens is attached to a handy type television camera body 2 such as an ENG (electric news gathering) camera, After the lens supporter 4 is fixed to the tripod 3, the lens 1 is fixed to one side of the lens supporter 4 and the camera body 2 is fixed to the other side, so that the weight of the lens 1 is directly applied to the camera 2. I try not to.

In order to fix the lens 1 to the lens supporter 4, first, the front portion 1A of the lens 1 is tilted upward, and the rear portion (mount) 1B of the lens 1 is brought into contact with the lens supporter 4. Then, when the lens 1 is lowered along the lens mounting surface 4A of the lens supporter 4, the mount 1B
The hook 5 (indicated by the dotted line) formed in the recess 1C of the mount engages with the hook 6 formed in the lens supporter 4 so that the positioning pin 7 (indicated by the dotted line) protruding from the recess 1C of the mount 1B It engages with the groove 8 (shown by the dotted line) formed in the hook 6. Thereby, the lens 1 is attached so that the optical axis 9A of the lens 1 coincides with the optical axis 9B of the camera body 2.

[0004]

As described above, when the lens 1 is attached to the camera side or the lens supporter side, the lens 1 is placed at the position of the lens supporter 4 (specifically, the height of the shoulder of the photographer). Must be lifted up to the However, in the conventional lens mounting structure,
Lens mounting surface 4A with the heavy lens 1 lifted
It is not easy to stably lower the lens 1 along with, and it becomes difficult to see the hooks 5 and 6 and the positioning pin 7, so that there is a drawback that it takes time to attach the lens 1.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a lens mounting structure in which the lens can be easily mounted on the camera side.

[0006]

In order to achieve the above-mentioned object, the present invention provides a lens by engaging a lens-side engaging portion with a lens-engaging portion formed on a camera side or a lens supporter side. In the lens mounting structure for mounting the lens on the camera side, at least one of the camera side, the lens supporter side, or the lens side, the position in the lens width direction is restricted, and the lens is attached to the camera side engaging portion. It is characterized in that a guide member for guiding is provided.

[0007]

According to the present invention, the position in the lens width direction is regulated by the guide member provided on at least one of the camera side, the lens supporter side, and the lens side, and the engagement portion on the lens side is controlled by the camera. Engages with the side engaging portion.
Accordingly, in the present invention, by providing the guide member, the lens can be stably engaged with the engagement portion on the camera side, so that the engagement portions are engaged with each other even when the engagement portions are difficult to see. Can be made. Therefore, in the present invention,
The lens can be easily attached to the camera side.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a lens mounting structure according to the present invention will be described in detail below with reference to the accompanying drawings. Figure 1
1 is an overall view showing an embodiment of a studio camera to which a lens mounting structure according to the present invention is applied.

As shown in the figure, a lens-shaped lens supporter 14 is fixed on the tripod head 12 of the tripod 10, and a studio camera body 16 is provided on the right side of the figure with the lens supporter 14 sandwiched therebetween. EFP lenses 18 are fixed to the middle left side, respectively. As shown in FIG. 2, the lens 18 is provided with a bayonet mount 22 at the center of a mount 20, and the bayonet mount 22 is provided through the opening 24 of the lens supporter 14 to the camera body 1 shown in FIG.
6 is connected.

A rectangular recess 26 is horizontally formed on the mount 20. An engaging plate 28 is fixed to the concave portion 26 along the concave portion 26, and hooks 32, 32 having tapered surfaces 30 are integrally formed at both ends of the engaging plate 28. Further, a positioning pin 34 is planted in the center of the recess 26 in parallel with the optical axis 36 of the lens 18.

The lens supporter 14 is formed such that the width B of the lens mounting surface 38 is equal to the width B of the mount 20 of the lens 18. An engaging plate 40 is horizontally fixed to the upper portion of the lens mounting surface 38, and the engaging plate 4
Hook 4 with tapered surfaces 42 formed on both ends
4, 44 are integrally formed. Furthermore, an arcuate groove 46 is formed in the center of the engagement plate 40.

When the lens mounting surface 38 of the lens supporter 14 and the mount 20 of the lens 18 are brought into close contact with each other in the width direction, the hooks 44, 44 are engaged with the hooks 32, 32 between the tapered surfaces 30, 42 ( (See FIG. 4), and the optical axis 36 on the lens 18 side and the optical axis 48 on the camera body 16 side coincide in the vertical direction. Further, the groove 46 engages with the positioning pin 34, and the optical axis 36 and the optical axis 48 are aligned in the horizontal direction. Thereby, the optical axes 36, 48
They match each other.

On both sides of the lens supporter 14, L
The character-shaped guide plates 50, 50 are fixed by screws 52. The guide plates 50, 50 are located on both sides of the engaging plate 40, the long portions 54, 54 are perpendicular to the lens mounting surface 38, and the distance C between them is equal to the width B of the mount 20 of the lens 18. Is set to. Next, a lens mounting procedure by the lens mounting structure configured as described above will be described.

As shown in FIG. 3, first, the lens 18 is lifted to the position of the lens supporter 14 and the front portion of the lens 18 is tilted upward. Next, the upper end portion 20A of the mount 20 of the lens 18 is inserted between the guide plates 50, 50, and the upper end portion 20A is brought into contact with the lens mounting surface 38 above the engagement plate 40 of the lens supporter 14.

Then, both side surfaces 18A of the lens 18 are guided by the guide plates 50, 50, and the lens 18 is lowered along the guide plates 50, 50.
The engaging plate 40 is immersed in the hook 32, 32 of the engaging plate 28.
The hooks 44, 44 of the engagement plate 40 are hooked on the. Then, when the front portion of the lens 18 is tilted downward and the lens 18 is gradually made horizontal, the taper surface 30 of the hook 32 starts to engage with the taper surface 42 of the hook 44. And
When the lens 18 is made horizontal, the tapered surfaces 30, 42
The two are completely engaged as shown in FIG.
4 engages with the groove 46 of the engaging plate 40. This completes the mounting of the lens 18.

That is, in this embodiment, the lens supporter 14
By providing guide plates 50, 50 on the lens 18,
Since it can be stably lowered with respect to the lens mounting surface 38, even if the hooks 32, 44 and the positioning pin 34 cannot be seen, the hooks 32, 44 and the positioning pin 34 are not visible.
Can be engaged in the groove 46. Therefore, in this embodiment, the lens 18 can be easily attached to the camera side as compared with the conventional lens attachment structure that does not use the guide plate 50.

FIG. 5 is a perspective view of a lens supporter to which a second embodiment of the lens mounting structure according to the present invention is applied. The lens supporter is the same as or similar to the first embodiment shown in FIGS. The same reference numerals are given to the members of the above, and the description thereof will be omitted. The guide plates 60, 60 shown in FIG.
The lens supporter 14 is fixed to both sides of the lens supporter 14, and the upper surface portion 64 of the lens supporter 14 extends in a direction perpendicular to the lens mounting surface 38 by a predetermined length. Further, as shown in FIG. 6, the upper surface portion 64 is positioned with respect to the upper end portion 14A of the lens supporter 14 via a predetermined gap 66.

By using the guide plate 60 thus constructed, the upper surface portion 18B of the lens 18 is brought into contact with the corner portion 65 of the guide plate 60, so that the mounting start position of the lens 18 can be easily positioned. You can As a result, in this embodiment, the mounting work of the lens 18 can be smoothly performed. In this embodiment, the lens supporter 1
Although the guide plates 50 and 60 are provided on the guide plate 4 to guide the EFP lens 18, the guide plate may be provided on the EFP lens 18 side to guide the lens.

Further, in this embodiment, the EFP lens 18 is used.
Although the example in which the lens is attached to the camera body 16 via the lens supporter 14 has been described, the present invention is not limited to this, and the present invention can also be applied to a specification in which the lens is directly attached to the camera body. Further, in the present embodiment, the example in which the studio camera 16 is used has been described.
It can also be applied with a camera.

[0020]

As described above, according to the lens mounting structure of the present invention, the position in the lens width direction can be adjusted by the guide member provided on at least one of the camera side, the lens supporter side, and the lens side. Since it is regulated so that the lens side engaging portion can be stably engaged with the camera side engaging portion, the lens can be easily attached to the camera side.

[Brief description of drawings]

FIG. 1 is an overall view of a studio camera to which a lens mounting structure according to the present invention is applied.

FIG. 2 is a perspective view showing a positional relationship between an EFP lens and a lens supporter.

FIG. 3 is an explanatory view showing a lens mounting method by the lens mounting structure of the present invention.

FIG. 4 is a cross-sectional view of essential parts showing an engaged state of an EFP lens and a lens supporter.

FIG. 5 is a perspective view showing a second embodiment of the guide plate.

6 is an explanatory view showing a lens mounting method using the guide plate shown in FIG.

FIG. 7 is an explanatory view showing a lens mounting method using a conventional lens mounting structure.

[Explanation of symbols]

 14 ... Lens supporter 16 ... Camera body 18 ... EFP lens 20 ... Mount 30, 44 ... Hook 34 ... Positioning pin 46 ... Groove 50, 60 ... Guide plate

Claims (1)

[Claims] 1. A lens mounting structure for mounting a lens on a camera side by engaging a lens-side engaging portion with a lens engaging portion formed on the camera side, wherein the camera side or the lens supporter side is provided. Alternatively, at least one of the lens side is provided with a guide member that regulates the position in the lens width direction and guides the lens to the engagement portion on the camera side.