JPH05276419A - Lens cap - Google Patents

Abstract

PURPOSE:To easily and surely make a picture horizontal while observing the finder picture of a camera and to easily confirm the horizontal state. CONSTITUTION:A lens cap 1 is composed of a main body 2 of the cap, attaching/detaching knob 3, lens fitting part 4 and hook 5, and the main body 2 of the lens is formed by a semitransparent material. Then, a shaft 6 is provided at the center of this main body 2 of the cap, a pendulum 7 to transmit external light at a certain degree is fitted to this shaft 6, and horizontal and vertical reference lines are provided on the lens side faces of this pendulum 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a VTR integrated with a camera.
The present invention relates to a lens cap capable of confirming the horizontal state of a camera when attached to a tripod or the like.

[0002]

2. Description of the Related Art At present, a camera-integrated VTR is often used with a tripod because its lens magnification is also increased.

The camera mounted on the tripod is leveled by looking for a horizontal line in the image while looking at the screen and aligning with the horizontal line.

On the other hand, the lens cap of the conventional camera is
It is composed of a cap body, a detachable knob, a lens attachment part, a hook for hooking the cap on a strap, etc., and is used only for the purpose of protecting the lens.

[0005]

Therefore, when there is no reference line in the screen to be photographed, it is difficult to level the camera. Further, a tripod with a spirit level has a problem that it is difficult to fit when it is not convenient and unfamiliar and the user cannot directly see the screen, which causes anxiety.

Further, since the cap itself is not used at the time of photographing, it often becomes an obstacle when it is removed from the lens. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a lens cap having a function as a level in addition to the function of protecting the lens by covering the lens at the time of photographing.

[0007]

In order to achieve the above-mentioned object, the lens cap of the present invention is constructed by providing a level member in the cap body as shown in FIG. 1, for example. Further, a shaft is provided at the center of the cap body, a pendulum as a level member is attached to the shaft, and horizontal and vertical reference lines are provided on the lens side surface of the pendulum.

[0008]

Since the lens cap of the present invention is constructed as described above, by covering the front end of the lens of the camera, it is possible to prevent dust and the like from directly adhering to the lens surface when not in use, and by the leveling member during photography. Check horizontal or vertical state. For example, when a pendulum is provided as the level member, the pendulum rotates appropriately about the axis to keep the horizontal reference line parallel to the horizon and the vertical reference line parallel to the vertical line. By aligning the viewfinder image frame with this reference line, the horizontal state of the camera is secured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lens cap to which the present invention is applied will be described below with reference to FIGS.

The lens cap 1 of this embodiment is provided with a cap body 2, detachable knobs 3 and 3, a lens mounting portion 4, a hook 5 and the like as in the conventional example, and a display plate as a level member is provided in the cap body 2. 7 is provided.

That is, a cap body 2 capable of taking in external light into a lens while being covered by a camera or the like is formed of a semitransparent material, and a shaft 6 is fitted in a center of the cap body 2 in a state of supporting both sides. A disc-shaped display plate 7 made of a semitransparent material is attached to 6 and a horizontal reference line 8 which can be fitted on the lens side surface of the display plate 7 within the focal point of the lens and can match the image frame F of the finder, vertical A reference line 9 is provided and configured.

Of these, the display plate 7 is formed of a thin film-like plate, and as shown in FIG. 2, a thick portion 7a is formed in the lower half of the center of rotation to serve as a pendulum about the shaft 6. It is supposed to work.

The horizontal reference line 8 and the vertical reference line 9 are horizontal and vertical reference lines, and the vertical reference line 9 is orthogonal to the horizontal reference line 8. The horizontal reference line 8 is
In order to make it easier to align when looking through the viewfinder, it is preferable to provide several lines near the image frame F, as shown in FIG.
Furthermore, a pattern 2 for facilitating focusing of the lens
0 is provided at the center of the display plate.

The operation of the lens cap 1 of the present embodiment thus constructed will be described below.

The camera is mounted on a tripod with the lens cap 1 still attached, and the mode is switched to the macro mode. The pattern 10 on the display plate of the lens cap 1, the horizontal reference line 8 and the vertical reference line 9
Focus on.

Next, the camera is fixed by adjusting a tripod so that the horizontal reference line 8 on the display plate 7 functioning as a pendulum becomes parallel to the image frame F of the finder, and the camera is fixed below the display plate 7. Half of them play the role of weights and rotate about the axis 6 as appropriate, so that the horizontal reference line 8 is always horizontal with respect to the horizontal line.
Further, the vertical reference line 9 is always kept parallel to the vertical line.

Therefore, the camera can be easily and surely kept horizontal simply by aligning the horizontal and vertical reference lines 8 and 9 with the image frame F of the finder.

As described above, according to this embodiment, even if the user is unfamiliar with the tripod, the camera can be leveled without anxiety while directly looking at the screen in the viewfinder without using the spirit level attached to the tripod. It is possible.

In particular, this embodiment has an effect that it is easy to level the VTR even when there is no horizontal or vertical reference line on the screen to be photographed.

The present invention can be variously modified without departing from the gist thereof. For example, as shown in FIG. 4, the shaft 16 is supported on one side with respect to the cap body 2, and the shaft 16 functions as a pendulum. The display plate 7 may be rotatably provided, and the horizontal reference line 8 and the vertical reference line 9 on the display plate 7 may be provided.
The number, arrangement, etc. of can be appropriately changed.

Further, in place of the display plate 7, a colored or non-colored liquid is enclosed in the cap body 2 so that the uppermost surface of the liquid is on the optical axis of the lens, and this is used as a horizontal reference line. May be.

[0022]

As described above, according to the lens cap of the present invention, it is possible to easily and reliably adjust the level while watching the screen of the finder or the like, and to easily check the horizontal state. Further, since it has a simple structure, it can be provided at a low cost without any failure, and when the camera is not used, it also functions as a cap for protecting the lens.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a lens cap of the present invention.

FIG. 2 is a partially cutaway side view of the same.

FIG. 3 is a diagram showing an image in the viewfinder when the lens cap is attached.

FIG. 4 is a sectional side view of another example of the lens cap.

[Explanation of symbols]

 1 Lens cap 2 Cap body 3 Detachment knob 4 Lens mounting part 6 Axis 7 Level member (display board) 8 Horizontal reference line 9 Vertical reference line

Claims (2)

[Claims] 1. A lens cap, wherein a level member is provided in the cap body. 2. A lens cap characterized in that a shaft is provided at the center of the cap body, a pendulum as a level member is attached to the shaft, and horizontal and vertical reference lines are provided on the lens side surface of the pendulum.