JPH0357203Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] This invention relates to an improvement of an optometry frame.

[Conventional technology]

Generally, in an optometry frame, a rotating ring that temporarily holds an optometry lens is loosely fitted onto the inner diameter edge of a fixed frame body and can be freely rotated around it. The rotating ring simply rotates, but it does not have a sense of moderation when rotating, and not only is it difficult to maintain and adjust the rotational position, but when used for a long time, it may loosely fit into the inner diameter edge of the fixed frame. The problem was that the fitting of the rotating ring caused some looseness, making it impossible to perform an accurate eye examination.

[Problem that the invention attempts to solve]

The present invention was proposed in view of the above-mentioned drawbacks of the conventional technology.The rotation of the rotating ring has a sense of moderation, and the rotational position is easy to maintain and adjust, and even after long-term use, the rotation of the rotating ring does not wobble. The aim is to provide an optometry framework that allows accurate eye examinations.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has been developed to provide a rotary ring that is loosely fitted and held on the inner diameter edge of the fixed frame and is rotatable around the rotating ring, which is fixed in a predetermined manner in the circumferential direction on the sliding contact surface with the fixed frame. Concave grooves are engraved radially at intervals, and the ball bearing is housed in the hole made in the fixed frame, and a leaf spring attached to the back of the fixed frame allows the ball bearing to be inserted into the notch carved in the rotating ring. It is characterized in that the optometry frame is formed by pressing into the groove.

[Effect]

The optometry frame of the present invention is constructed as described above, so when the rotating ring is rotated, the ball bearings pressed by the leaf springs align with the grooves radially carved on the sliding surface of the rotating ring. Every,
This will create a sense of moderation. Further, since the ball bearing is constantly pressed by the leaf spring, there is no wobbling in the rotation of the rotating ring, and stable rotation is maintained for a long period of time.

〔Example〕

Hereinafter, the present invention will be specifically explained based on the illustrated embodiments.

FIG. 1 is a partially cutaway front view of an optometry frame showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view of the sliding contact portion between the rotating ring and the fixed frame shown in FIG. 1. ,
FIG. 3 is a partially broken back view.
In the figure, 1 is a fixed frame that constitutes an optometry frame, and the left and right fixed frames 1 are connecting plates 3 that hold nose pads 2.
It is supported by and fixed with screws 4.

Reference numeral 5 denotes an inner diameter edge of the fixed frame 1, which protrudes from the front side in a brim shape and is slightly folded back to the outside.

6 is a rotating ring formed in a ring shape from a lightweight and strong titanium or titanium alloy plate, the inner diameter of which is loosely fitted into the inner diameter edge 5 of the fixed frame 1, and is held;
It is designed to be able to rotate freely around it.

Reference numeral 7 denotes a lens holder located at a predetermined interval on the circumferential surface of the rotating ring 6, which is formed integrally by bending a part of the rotating ring 6, and its cross section is shaped so that it can easily hold the optometric lens. It has a waveform.

Reference numeral 8 denotes a lens holding spring for stably holding the optometric lens held in the lens receiver 7, and is attached to one of the lens receivers 7 with screws 9.

Furthermore, grooves 10 are radially carved on the sliding surface of the rotating ring 6 with the fixed frame 1 at predetermined intervals in the circumferential direction. A ball bearing 11 is housed in a hole 12 provided in the fixed frame 1. Reference numeral 13 denotes a leaf spring attached to the back surface of the fixed frame 1 with screws 14, and is adapted to press the ball bearing 11 housed in the hole 12 against the groove 10 carved in the rotary ring 6.

Note that 15 indicates a trajectory along which the rotating ring 6 slides into contact with the ball bearing 11.

In the optometry frame of the present invention having the above configuration,
If the outer periphery of an optometry lens for astigmatism testing or the like is held by the lens holder 7 and the outer periphery is pressed by the lens presser spring 8, the optometry lens will be stably held by the rotating ring 6.

Further, the optometry lens held by the rotating ring 6 can be rotated together with the rotating ring 6 and stopped at any position by rotating the rotating ring 6 along the inner diameter edge 5 of the fixed frame 1. .
By the way, when the rotating ring 6 is rotated, the ball bearing 11 pressed by the leaf spring 13 moves into the grooves 10 radially carved on the sliding surface of the rotating ring 6.
Every time you agree with this, you will feel a sense of moderation.
Further, since the ball bearing 11 is constantly pressed by the leaf spring 13, the rotating ring 6 does not wobble, and stable rotation is maintained for a long period of time.

In this embodiment, the ball bearing 11 is provided at only one location, but the rotating ring 6
They may be arranged at two or three locations in the circumferential direction.

[Effect of idea]

As specifically explained above, in the optometry frame of the present invention, while the rotating ring is rotating, the ball bearing pressed by the leaf spring aligns with the grooves radially carved on the sliding surface of the rotating ring. This creates a sense of moderation, making it easier to maintain and adjust the rotational position. In addition, since the ball bearing is constantly pressed against the rotating ring by a leaf spring, there is no wobbling in the rotation of the rotating ring, and stable rotation is maintained for a long period of time. This provides an extremely effective optometry framework for practical use.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of an optometry frame showing an embodiment of the present invention; FIG. 2 is a cross-sectional view of the sliding contact portion between the rotating ring and the fixed frame shown in FIG. 1; FIG. 3 is a partially broken back view. 1...Fixed frame body, 2...Nose pad, 3...
Connecting plate, 4...screw, 5...inner diameter edge, 6...rotating ring, 7...lens holder, 8...lens holding spring, 9...screw, 10...concave groove, 11...ball bearing, 12... Hole, 13... Leaf spring, 14
...Bis, 15...Trajectory.

Claims (1)

[Scope of utility model registration request] Concave grooves are radially carved at predetermined intervals in the circumferential direction on the sliding surface of a rotating ring that is loosely fitted and held on the inner diameter edge of the fixed frame and can freely rotate around it. A ball bearing is housed in a hole provided in a fixed frame, and a leaf spring attached to the back of the fixed frame presses the ball bearing into a groove carved in a rotary ring. Optometry frame.