JPH0143691Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of the invention This invention relates to reading glasses that can be used by selecting two different diopters by sliding the lenses up and down.

(b) Background of the invention In general, two types of reading glasses are commercialized: one in which a part of the lens is formed for presbyopia, and the other in which the entire lens is formed for presbyopia.

The former type of reading glasses requires viewing objects such as letters through the lens part for presbyopia, so
When the object is located below, the viewing direction is downward, which causes eye fatigue and shoulders to become stiff.

The latter type of reading glasses is inconvenient because it is necessary to put on another pair of reading glasses each time you want to see an object clearly, and there are also problems such as misplacing or losing the glasses.

Therefore, as a means to solve the above problems,
When the front and rear surfaces and the top and bottom surfaces of the lens are formed to have different dioptric powers and the lens is rotatably attached to an eyeglass frame, the lens is positioned in front of the eye, which stabilizes the viewing direction and reduces eye fatigue. It also eliminates the trouble of changing reading glasses, making it convenient.

However, with this configuration, there is a problem that when rotating the lens, the front and rear surfaces of the lens may be set incorrectly, and three-dimensional lens processing is required because the front and rear surfaces and the top and bottom surfaces of the lens are processed. Compared to conventional lens processing of only the front and rear surfaces, the processing technology is more difficult and the manufacturing cost is higher.

(c) Purpose of the invention This invention is based on the ability to slide the lens up and down.
To provide reading glasses that can be used by accurately selecting two different dioptric powers.

(d) Summary of the invention This invention is a pair of reading glasses in which a pair of left and right lenses are slidably attached to an eyeglass frame at an upper position and a lower position, and the upper and lower sides of the pair of lenses are formed to have different powers. It is characterized by

(e) Effects of the device With this device, when the user visually observes objects such as letters, the user selects the power by sliding the lens up and down, so there is no chance of making a mistake in selecting the power, and the user can easily see the object. You can select the appropriate power side that allows you to see things clearly.

Moreover, since there is no need to change the reading glasses to another one, there is no risk of misplacing or losing the reading glasses.

Furthermore, since it is only necessary to process the front and rear surfaces of the lens, the upper and lower sides of the lens can be processed to different powers using conventional processing techniques, resulting in lower manufacturing costs.

(F) Embodiment of the invention An embodiment of the invention will be described below in detail based on the drawings.

The drawings show reading glasses that can be used by selecting the power of the lens.
consists of an eyeglass frame 2, a pair of left and right lenses 3, 3 attached to both sides of the eyeglass frame 2 so as to be vertically slidable, and ear hooks 4, 4 pivotably attached to both ends of the eyeglass frame 2 so as to be foldable. , and nose pads 5, 5, which are vertically disposed on the central portion 2a of the eyeglass frame 2.

As shown in FIG. 2, the above-mentioned eyeglass frame 2 has both sides of the eyeglass frame 2 curved in a U-shape,
And the center part 2a of the eyeglass frame 2 and the end part 2
A pair of left and right lenses 3, 3 are individually supported between the lenses 2b and 2b.

The above-mentioned lens 3 has an upper part and a lower part formed with two different powers, and has long grooves 3a, 3a vertically formed on both sides of the lens 3, and further faces the central part 2a of the eyeglass frame 2. Positioning recesses 3b and 3c for setting the vertical sliding position of the lens 3 are formed on the surface at vertical positions.

To attach the lens 3 described above, the guide protrusions 2c formed on both sides of the center portion 2a of the eyeglass frame 2 are engaged with the long grooves 3a inside the lens 3, and then the screws 6 screwed into the end portion 2b of the eyeglass frame 2 are engaged. is inserted into the long groove 3a on the outside of the lens 3 and supported so as to be vertically slidable.

Further, a lens 3 is provided near the guide protrusion 2c described above.
A locking protrusion 2d is formed which always engages with one of the recesses 3b and 3c of the lens 3. When the lens 3 is slid up and down, the locking protrusion 2d engages with the recess 3b formed at the upper position of the lens 3.
When engaged with the concave portion 3c formed at the lower position of the lens 3, the lower part of the lens 3 is held in a state aligned with the center of the pupil of the user. to hold.

When using the reading glasses 1 configured in this way, the lens 3 is slid up and down to select two types of diopter power, upper and lower, so that when the user visually observes objects such as letters, etc. , you can select and use the appropriate power that allows you to clearly see the object.

Moreover, since there is no need to change reading glasses every time, there is no chance of misplacing or losing them.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, with FIG. 1 being a perspective view of reading glasses, and FIG. 2 being a longitudinal sectional front view of the main parts. 1... Reading glasses, 2... Glasses frame, 2c...
Guide protrusion, 2d...locking protrusion, 3...lens,
3a...Long groove, 6...Screw.

Claims (1)

[Scope of Claim for Utility Model Registration] Reading glasses in which a pair of left and right lenses are slidably attached to an eyeglass frame at upper and lower positions, and the upper and lower portions of the pair of lenses are formed to have different powers.