JPH0511337A - Strap mounting device for optical instrument - Google Patents

Abstract

PURPOSE:To prevent the twisting of a strap without impairing the degree of freedom of strap handling at the time of photographing and carrying by providing stoppers respectively in a lens barrel fixing part and mounting fittings. CONSTITUTION:The strap mounting fittings 2 are mounted to the lens barrel fixing part 1 rotatably around the axis in the direction perpendicular to the fixing part. The stoppers 1C, 2C are provided respectively in the fixing part 1 and the mounting fittings 2 so that rotation can be regulated by the contact of the stoppers 1C, 2C with each other. The strap mounting fittings 2 are so constituted that the fittings can rotate within a specified rotating angle range around the axis in the direction perpendicular to the lens barrel fixing part 1. The strap can rotate without twisting with the optical instruments, such as interchangeable lenses, without impairing the degree of freedom of the strap handling. The strap does not hinder the operation at the time of photographing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strap attaching device for a portable device such as a camera, and more particularly to a strap attaching device for an interchangeable lens for a camera.

[0002]

2. Description of the Related Art Conventionally, among interchangeable lenses for single-lens reflex cameras, a relatively heavy telephoto lens and the like often include a lens barrel equipped with a strap fitting.

These are fixed to the lens barrel by directly providing a strap mounting hole in the lens barrel, fixing a mounting bracket with a screw or the like, or in a direction perpendicular to the fixing portion of the lens barrel. There is a structure in which a strap mounting bracket is supported so as to be rotatable around an axis.

[0006] Usually, these strap attachment portions are provided at a plurality of places on the lens barrel, and the strap is normally connected to two places out of the plurality of places.

[0005]

However, the one in which the mounting bracket is fixed to the lens barrel can be used in various situations such as when a strap is hung on the shoulder, the lens barrel is mounted on a tripod, or when the camera is held by hand. In order to achieve this, since the connecting portion of the strap has a low degree of freedom, there is a problem that unreasonable force is applied to the connecting portion and the durability is poor, and the strap interferes with the operation during shooting.

The above-mentioned problem is solved in the case where the mounting bracket is rotatably supported around the axis of the vertical direction with respect to the fixed portion of the lens barrel, but the mounting brackets at two locations are free. Since the strap is twisted, the strap is twisted, and when the strap is to be hung on the shoulder, there is the trouble of restoring the twist of the strap.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems inherent in the above-mentioned prior art, and to provide a strap attaching device configured so that the strap can be rotated with respect to an optical device such as an interchangeable lens without being twisted. Is.

[0008]

According to the apparatus of the present invention, a strap mounting member is mounted so as to be rotatable about an axis in a vertical direction with respect to a fixing portion of a lens barrel, and stoppers are provided on the fixing portion and the mounting member, respectively. Since the stoppers are brought into contact with each other so that the rotation can be regulated, the strap mounting member can be supported rotatably within a certain rotation angle range around the axis perpendicular to the fixed portion of the lens barrel. It is configured as follows.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a fixed portion of the lens barrel, which is a mounting recess 1a, a shaft hole 1b, a stopper 1c, and
have.

Reference numeral 2 is a strap mounting member, which has a strap mounting hole 2a, a shaft foot portion 2b, and a stopper 2c.

Reference numeral 3 denotes a shaft screw for fixing, which is a screw portion 3a,
It has a shaft portion 3b.

As shown in FIG. 2, the strap mounting bracket 2
Is attached to the fixed portion 1 with the shaft screw 3, but since the length of the shaft portion 3b of the shaft screw 3 is set to be slightly longer than the depth of the shaft hole 1b of the fixed portion 1, the strap mounting metal fitting 2 Are supported so that they can rotate around the shaft hole 1b of the fixed portion 1.

In the above structure, the strap mounting bracket 2
As shown in FIG. 3, the range of rotation of the stopper 2c from the state in which one surface of the stopper 2c of the strap mounting member 2 is in contact with one surface of the stopper 1c of the fixed portion 1 Is a range of the angle A until the surface a comes into contact with the other surface of the stopper 1c of the fixed portion 1.

The range of the angle A can be freely set to some extent by changing the thickness of the stopper 1c and the stopper 2c in the rotation direction.

FIG. 4 shows a rotation range A when the strap is attached to the strap fitting having the above-mentioned structure.

[0017]

As described above, the strap mounting bracket is rotatably mounted on the fixed part of the lens barrel about the axis in the vertical direction, and the fixed part and the mounting bracket are provided with stoppers so that the fixed parts can be fixed. The rotation of the mounting bracket is restricted within the rotation angle range, and it is possible to prevent the strap from twisting without impairing the degree of freedom in handling the strap during shooting or carrying.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a strap attaching device according to the present invention.

FIG. 2 is a vertical cross-sectional view of the device shown in FIG.

FIG. 3 is a diagram showing the range of rotation of the strap attachment fitting in the device shown in FIGS. 1 and 2.

FIG. 4 is a perspective view of a camera with a lens having the device of the present invention.

[Explanation of symbols]

1: Fixed part of lens barrel 2: Strap mounting bracket 1c: Stopper 2c: Stopper

Claims (2)

[Claims] 1. A recess formed in an outer wall surface of an optical device or the like, or an outer wall surface of a member fixed to the outer surface of the optical device, and a first stopper projecting at a predetermined position in the recess. A strap attachment member rotatably fitted in the recess, and a strap attachment member formed on the strap attachment member so as to come into contact with the first stopper when the strap attachment member is rotated by a maximum angle in the recess. A strap attachment device for an optical device or the like, which has a second stopper. 2. The strap attaching device according to claim 1, wherein the optical device is an interchangeable lens for a camera, and the recess is formed on an outer peripheral surface of the interchangeable lens.