JPH0116085Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting/fixing device for an accessory mounted on an accessory shoe provided in a camera, and particularly to a mounting/fixing device having a tightening means on the accessory side.

Conventionally, when attaching an accessory to a camera's accessory shoe (hereinafter simply referred to as "the shoe"), the mounting foot member on the accessory side inserted into the shoe is moved by a spring means provided on the shoe side. In either case, a friction-based fixing method was used, in which the mounting foot member was pushed up and fixed to the shoe by pressure, or the mounting foot member was tightened and fixed to the inner surface of the shoe using a tightening member provided on the accessory side. However, in the former case, it is not possible to increase the force of the spring in order to reduce the resistance when inserting the mounting foot member into the shoe and facilitate the insertion, and as a result, there is a risk that the attachment foot member may fall off from the shoe due to vibration. The latter also has the disadvantage that the tightening member loosens due to vibration, and as with the former, the mounting leg member falls out of the shoe during photographing.

The present invention solves the drawbacks of the above-mentioned conventionally known accessory mounting and fixing devices, and has a simple structure that prevents the tightening member from loosening, and even if it loosens to some extent due to strong vibrations, does not fall off from the shoe. Its purpose is to provide a mounting and fixing device for accessories.

Hereinafter, the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a sectional view of the embodiment of FIG. 1 in a state where it is attached to a camera shoe, and FIG. 2A is a left side view of FIG. 2. In Fig. 1, a main body attachment part 1 that forms a part of the accessory main body is provided with a threaded part 1a that screws into a tightening ring 2, and a leaf spring 3, which will be described in detail later, is attached to the end surface of this threaded part 1a. The mounting leg member 4 is fixed therebetween with machine screws 5. On both sides of the mounting leg member 4, there are formed a central plane part 4a which is connected to the threaded part 1a via the leaf spring 3, and a step part 4b one step lower on both sides of the central plane part 4a.
As shown in Figure A, it is configured to be inserted into a groove 6a formed inside a shoe 6 provided on the camera body and to be able to engage with a shoe jaw 6b.

The leaf spring 3 is made of a metal plate material with high elasticity.
The outer shape is a rectangle as shown in Figure A, and the inside thereof is cut out as shown by the thick line by press working, and at the same time, it is bent and formed along the dotted line to form a Z-shaped leaf spring as shown in Figure 1. This Z-shaped leaf spring 3
is formed by connecting a U-shaped upper plane part 3a and a T-shaped lower plane part 3b by two belt-like inclined parts 3c, and the upper and lower plane parts 3a and 3b are planes parallel to each other. The inclined portion 3c is configured to act as a spring. Moreover, the upper plane part 3a
A bent part 3d bent at a right angle is formed at one end, and a machine screw 5 passes through the lower flat part 3b.
holes 3b are provided. The inner width l ₃ (see Fig. 1A) of the upper plane portion 3a is formed to be slightly narrower than the width l 4 of the central plane portion 4A of the mounting foot member ₄ , and the interval d between the two band-shaped inclined portions 3c (see Fig. 1A) (see figure)
is narrower than the diameter of the threaded portion 1a of the main body attachment portion 1, so the threaded portion 1a has a flat portion 1b (see Fig. 1) cut out on both sides of the threaded portion 1a so as not to interfere with this distance d. It is formed.

2 and 2A show a state in which the mounting foot member 4 is inserted into the shoe 6. In this state, the tightening ring 2 is at the top of the threaded part 1a of the main body mounting part 1, and the plate spring 3 is A bent portion 3d formed at one end of the upper flat portion 3a is located above the upper surface of the shoe 6. Therefore, in FIG. 2, when the mounting foot member 4 is inserted into the shoe 6 from the left side, the inclined portion 3c and the threaded portion 1a of the leaf spring 3 are placed between the shoe jaws 6b as shown in FIG. 2A,
The bent portion 3d passes through the upper part of the shoe 6 and is located at the right end of the shoe 6. Also, the upper flat part 3 of the leaf spring 3
a covers the upper surface of the shoe jaw portion 6b.

Next, the tightening ring 2 is rotated to push down the upper flat part 3a of the leaf spring 3 against the biasing force of the leaf spring 3, and the upper flat part 3a is applied to the upper surface of the shoe jaw 6b.
When pressed, the bent portion 3d engages with the right end of the shoe 6 as shown in FIG. In the fixed state shown in FIG. 3, the upper plane part 3a of the leaf spring 3 is in pressure contact with the upper surface of the jaw part 6a of the shoe 6, and the step part 4b of the mounting foot member 4 is in pressure contact with the lower surface. The body mounting portion 1 is firmly fixed to the shoe 6 by the frictional force generated by the pressure from both of them. Further, due to the urging force of the leaf spring 3, the tightening ring 2 will not loosen even if there is some vibration. Furthermore, even if the tightening ring 2 is slightly loosened due to some force, the bent portion 3d remains engaged with the end of the shoe 6, so that the entire accessory including the mounting foot member 4 will not fall off from the shoe 6. Nothing happens.

When removing this device from the shoe 6, first loosen the tightening ring 2 and connect the bent portion 3d to the shoe 6.
2, the upper flat part 3a of the leaf spring 3 is lifted from the upper surface of the shoe 6 by the urging force applied to the inclined part. After that,
Simply slide the main body mounting portion 1 to the left in FIG. 2 and remove the mounting leg member 4 from the shoe 6.

The threaded portion 1a and the tightening ring 2 constitute a tightening means, and in FIG. 1, the threaded portion 1a is integrally formed with the main body mounting portion 1. However, the threaded portion 1a is formed integrally with the mounting foot member, a hole is provided in the main body mounting portion 1, the threaded portion is fitted into this hole, and a pin is driven into the threaded portion of the tightening means to connect the threaded portion 1a. may be formed. Further, in the above embodiment, the leaf spring 3 is made of a metal material, but it goes without saying that it may be formed of a plastic material.

As described above, according to the present invention, a leaf spring having a bent portion to be engaged with the end of the shoe is fixed to the mounting leg member, and the leaf spring is tightened and fixed to the shoe by the tightening means via the leaf spring. Because of this structure, it can be easily installed and fixed, and the fixation is reliable. Furthermore, even if the screw is loosely tightened, the attached accessory will not fall off from the shoe due to vibration. Furthermore, since the structure is extremely simple, the device can be provided at low cost.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of one embodiment of the present invention.
Figure A is a developed view of the leaf spring in Figure 1, Figure 2 is a sectional view of the embodiment shown in Figure 1 attached to a shoe, and Figure 2A is a developed view of the leaf spring in Figure 1.
The figure is a left side view of FIG. 2, and FIG. 3 is a cross-sectional view of the embodiment of FIG. 1 attached and fixed to a shoe. 1a, 2... Tightening means, 3... Leaf spring, 3d
...Bending portion, 4...Mounting leg member, 6...Accessory shoe.

Claims (1)

[Scope of utility model registration request] In a camera accessory having a mounting foot member to be inserted and fixed into an accessory shoe and a tightening means, a leaf spring covering the upper surface of the accessory shoe is fixed to the mounting foot member, and a free end of the leaf spring is fixed to the mounting foot member. A bent portion is formed at the end of the accessory shoe in the insertion direction, and when the accessory shoe is tightened by the tightening means via the leaf spring, the bent portion engages with one edge of the accessory shoe. A mounting and fixing device for camera accessories, characterized in that the device is configured to fit together.