JPH03174527A - Optical equipment - Google Patents

Abstract

PURPOSE:To obtain optical equipment in which no flaw is prominent even when a mount is molded with a plastic material by forming plural ring studs on the abutting plane of the mount. CONSTITUTION:Since a camera mount 1 is provided with plural concentrical circle shape ring studs 1e with the mount, only the apex part of the ring stud 1e receives a frictional force when it is slided with the mount plane 3b of a lens mount 3. In other words, only the tip of the ring stud 1e is abutted with the mount plane 3b of the lens even when the camera mount 1 is molded with the plastic material. Thereby, a scratch generated when a plane is a flat plane exists at the tip of the ring stud 1e observing from a macro standpoint, however, it is not recognized with human eyes, and is not entirely prominent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to optical instruments such as cameras and lenses having a coupling mount.

[Prior Art] Conventional camera and lens mounts have been created by cutting out metal, or by sintering stainless steel material and then subjecting it to partial processing.

[Problems to be Solved by the Invention] For this reason, conventional camera and lens mounts require a long manufacturing process and are very expensive components.

Therefore, it is possible to mold the mount from plastic material, but parts molded from plastic material are
Its surface hardness is weaker than that of metal materials. Therefore, for example, when a lens is attached to a camera, the surface of the camera mount that comes into contact with the metal lens mount on the lens side, especially the surface that receives force, is easily scratched, which seriously degrades the quality of the product. It ends up.

[Means (and actions) to solve the problem] Therefore,
In the present invention, a plurality of annular protrusions are integrally molded on the contact surface of the mount in order to make scratches caused by sliding less noticeable and to maintain the quality of the product, even in optical devices that have a mount molded from a plastic material. It is characterized by a structure in which the abutting portion is limited so that even if scratches occur, they do not become scratches and are not noticeable.

[Example] Fig. 1 shows only the mount 1 of a camera embodying the present invention, and Fig. 1(a) shows the shape of the camera as seen from the front;
FIG. 1(b) shows the shape seen from the back side, and is integrally molded from a plastic material. Reference numeral 1a indicates a plurality of claws protruding inwardly from the mount surface, and 1b indicates a plurality of protrusions protruding toward the rear surface of the mount 1 (FIG. 1(b)) on the claws 1a. It has two protrusions 1b. 1c is a hole for a lens lock bottle, 1d is a hole for a mount installation screw, and 1e is a plurality of annular protrusions, which are integrally molded concentrically with the mount 1.

Figure 2 shows the shape of the mount spring 2 that comes into contact with a part of the mount on the lens side when the camera is attached to the lens, and generates a force that presses the lens mount toward the camera mount. In the figure, 2a is on the lens side. This is a spring part that comes into contact with the mount.

FIG. 3 is a front view of the lens mount 3, showing the claw portion 3a that comes into contact with the spring portion 2a of the mount spring 2 and receives force, and the so-called mount that comes into contact with the mount surface 1e of the camera mount 1 and determines the position of the lens. It has a surface 3b.

FIG. 4 shows a conventional camera mount 4 formed by cutting out metal, with FIG. 4(a) showing its front view and FIG. 4(b) showing its back view.

The mount 4 has a plurality of claws 4a, protrusions 4b protruding from the claws 4a to the back side, screw holes 4d for attaching the mount 4 to the camera, and a mount surface 4e that contacts the lens mount.

FIG. 5 shows a state in which a lens is deposited on the mount 4 of a conventional camera.

FIG. 6 shows a state in which the lens 20 is attached to the mount 1 of the camera 10 according to the present invention. In the figure, 11 is a pentaprism, and 12 is a mirror 21, which is a lens optical system. Next, the engagement of the conventional camera mount 4 and lens mount 3 will be explained using FIGS. 3 to 5.

The lens mount 3 is moved from the left direction in FIG. 5 toward the camera mount 4, and the lens claw 3a is aligned with the non-claw part 4g of the mount 4, so that the camera mount surface 4e and the lens mount surface 3b are aligned. After moving until they come into contact, they are rotated, and then rotated and stopped until they are stopped by a stopper 1 member (not shown).

At this time, the claw part 3a of the lens mount 3 is urged into contact with the spring part 2a of the mount spring 2, and receives a biasing force in the direction of close contact, so that the camera mount surface 4e and the lens mount surface 3b abut, and the lens and camera The connection is completed.

Now, at this time, since the lens mount 3 rotates while receiving the force of the mount spring 2 during the above-mentioned lens mounting operation, a large frictional force is applied to the camera mount 4, causing the camera mount 4 to move as much as or more than the lens mount 3. If a member with surface hardness, that is, a metal material, is not used, large scratches will occur, which will significantly reduce the product value.

Next, an embodiment will be explained with reference to FIG.

The method of attaching the lens mount 3 to the camera mount 1 is the same as that of the conventional example, so a description thereof will be omitted.

The camera mount 1 has a plurality of annular protrusions 1e concentric with the mount, so the mount surface 3 of the lens mount 3
Only the apex portion of the annular protrusion 1e receives a frictional force when it comes into sliding contact with the annular protrusion 1e.

That is, even if the camera mount 1 is molded from a plastic material, only the tip of the annular projection 1e comes into contact with the lens mount surface 3b.
If you look at the scratches on the surface from a macroscopic point of view, the scratches appear on the ring-shaped protrusion 1.
Although it exists at the tip of e, it cannot be felt by the human eye and is completely inconspicuous.

[Effects of the Invention] As explained above, by forming a plurality of annular protrusions on the contact surface of the mount, it is possible to provide an optical device in which scratches are completely inconspicuous even when the mount is molded from a plastic material. Compared to conventional metal mounts, the number of processes can be significantly reduced, and costs can also be significantly lowered.

[Brief explanation of the drawing]

Figure 1(a) is a front view of only the mount of a camera embodying the present invention. Figure 1(b) is a back view of only the mount of a camera embodying the present invention. Figure 2 is a front view of only the mount spring. The figure is a front view of only the lens mount. Figure 4 (a) is a front view of only a conventional camera mount. Figure 4 (b) is a back view of only a conventional camera mount. Figure 5 is a front view of a conventional camera mount and a lens mount. 6 is a cross-sectional view of the main part when the lens mount is mounted on the camera mount according to the present invention. 1... Camera mount 2... Mount spring 3... Lens mount 1e... Annular protrusion Figure 5

Claims (1)

[Claims] (1) An optical device having a mount for coupling with other equipment, characterized in that the mount is molded from a plastic material and a plurality of annular protrusions are integrally molded on the contact surface.