JPH036485B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of the Invention The present invention relates to eyeglasses in which the interpupillary distance between the left and right lenses can be adjusted to the interpupillary distance of the wearer.

(b) Background of the Invention In general, eyeglasses have left and right lenses fixedly held in a frame, so it has not been possible to adjust the interpupillary distance of the lenses to match the interpupillary distance of the wearer.

Therefore, eyeglasses have been developed in which the interpupillary distance can be adjusted by sliding the left and right lenses in the horizontal direction by rotating a rod screw or the like.

However, although this configuration is suitable for finely adjusting the lens spacing, if you want to vary the interpupillary distance between the lenses between the maximum and minimum widths, you have to turn the bar screw several times, which makes the operation laborious. In the past, there was a problem in that quick adjustments could not be made.

Additionally, since there is no standard stopping position for the lenses, the left and right lenses may be biased to one side of the frame, making it difficult to accurately align the center of the lens' pupil with the position of the wearer's pupil. There were also problems.

C. Purpose of the Invention This invention provides eyeglasses that can quickly and accurately adjust the distance between the lenses to the interpupillary distance of the wearer by sequentially changing the lenses to a regulating position in the interpupillary direction by a pressing operation. With the goal.

(d) Structure of the Invention This invention provides a lens holder that is constantly pressed outward and is slidably attached to an eyeglass frame that is formed into a groove with a U-shaped cross section with openings on the lower surface sides of both left and right sides. A support shaft is fixed to the lens holder so that both ends thereof protrude outward, and each outer end pressing part is installed in a protruding state on an outer support piece provided on the eyeglass frame, and each inner end is fixed to the inner side. A locking groove is installed on the support piece, and has a locking groove provided with a plurality of sawtooth locking steps and a continuous long groove on either the inner surface of the eyeglass frame or the outer surface of the lens holder, and the locking groove on the other side. The eyeglasses are provided with a protrusion that is movable within a stop groove, and the distance between the left and right lenses can be adjusted by selectively engaging the protrusion with a plurality of locking steps by pressing the outer end pressing portion of the support shaft. It is characterized by

(e) Effects of the Invention This invention adjusts the interpupillary distance of the lenses by sliding the left and right lenses in the interpupillary direction only by pressing the pressing parts protruding from the left and right sides of the eyeglass frame. There is no need for a return operation to return from the narrow width to the maximum width, and the interpupillary distance of the lens can be adjusted quickly and easily.

In addition, the regulation position of the left and right lenses can be changed step by step with just a single press, making it possible to precisely match the pupil center of the left and right lenses with the wearer's pupil position, allowing for the selection of the interpupillary distance. can be done easily.

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

The drawings show eyeglasses for vision correction;
In the figure, eyeglasses 1 include an eyeglass frame 2, a pair of left and right lenses 3, 3 attached to both lower sides of the eyeglass frame 2 so as to be slidable in the interpupillary direction, and lenses provided inside the eyeglass frame 2, respectively. Alternate mechanism 4 for adjusting the interpupillary distance of 3, 3; Ear hooks 5, 5 foldably pivoted on both sides of the eyeglass frame 2; and a nose pad hanging down in the center of the eyeglass frame 2. It consists of 6 and 6.

As shown in FIGS. 3 and 4, the above-mentioned eyeglass frame 2 has an open bottom side formed into a U-shaped groove, and resin lens holders 7, 7 inside both sides. It is slidably attached.

The above-mentioned lens holders 7, 7 are fixed to support shafts 8, 8, and both ends thereof protrude outward.

The support shafts 8, 8 are respectively installed on support pieces 2a, 2a formed on both sides of the eyeglass frame 2 and support pieces 2b, 2b vertically provided inside, and are supported slidably in the axial direction. has been done. Outer end pressing portions 8a, 8a are formed at the outer ends of the support shafts 8, 8, and retainers 8b, 8b are formed at the inner ends.

Further, a spring 9 is interposed on the support shaft 8 between the lens holder 7 and the inner support piece 2b, so that the left and right lenses 3, 3 are always held in the direction outward, that is, in the direction in which they are separated from each other. The tools 7, 7 are energized.

Further, a plate spring 1 is attached to the top surface of the lens holders 7, 7.
0,10 are fixed, and this leaf spring 10,10
is in contact with the upper wall surface inside the eyeglass frame 2,
The lens holders 7, 7 are pressed downward.

The above-mentioned lenses 3, 3 have a metal holding frame 1 whose upper part is fitted onto the lower surface of the lens holders 7, 7, and whose both ends are fixed to the lens holders 7, 7 on the outer peripheral edge of the lower part.
1 and 11 are fitted and held.

As shown in FIGS. 4 and 5, the above-mentioned alternate mechanism 4 includes protrusions 7a, 7a protruding from the side surface of the lens holder 7, and a locking groove 12 formed on the opposing wall surface inside the eyeglass frame 2. 12.

In the locking groove 12 described above, a plurality of sawtooth locking step portions 12a are formed in the horizontal direction, and a protrusion 7 is formed from the final locking step portion 12a to the first locking step portion 12a.
A long groove 12b is formed for returning the a.

A case will be described in which the interpupillary distance between the lenses 3, 3 of the glasses 1 configured in this manner is adjusted.

First, the outer end pressing parts 8a, 8a protruding from both sides of the eyeglass frame 2 are pressed against the springs 9, 9, and both lenses 3, 3 are pushed through the support shafts 8, 8 and lens holders 7, 7. slide it inward.

At this time, the protrusion 7a of the lens holder 7 is inserted into the locking groove 1.
The position of the lens 3 can be varied by sequentially locking the two locking steps 12a, and the interpupillary distance between the lenses 3 can be adjusted.

When the protrusion 7a is locked to the final locking step 12a, it escapes from the locking step 12a and enters the long groove 12b on the return side, and then, due to the biasing force of the spring 9. and returns to the initial position.

In this way, the interpupillary distance between the left and right lenses 3, 3 can be adjusted simply by pressing the outer end pressing portion 8a, and the adjustment can be performed quickly and easily.

Moreover, since the regulating positions of the left and right lenses 3, 3 are varied stepwise, the optimum state can be selected to match the interpupillary distance of the wearer.

Note that the locking groove 12 may be formed on the lens holder 7 side, and the protrusion 7a may be provided on the eyeglass frame 2 side.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of the glasses, FIG. 2 is a front view of the glasses, FIG. 3 is an enlarged sectional view taken along the line A-A in FIG. 1, and FIG. 4 is a perspective view of the glasses. 1 is an enlarged sectional view taken along the line B-B in FIG. 1, and FIG. 5 is an enlarged sectional view showing the alternate mechanism. 1... Glasses, 2... Glasses frame, 2a... Support piece,
3... Lens, 4... Alternate mechanism, 7... Lens holder, 7a... Projection, 8... Support shaft, 8a... Support shaft outer end pressing portion, 12... Locking groove, 12a... Locking step, 12
b...Long groove.

Claims (1)

[Scope of Claims] 1. A lens holder that is constantly pressed outward is slidably attached to an eyeglass frame that is formed into a groove with a U-shaped cross section with openings on the lower surface sides of both the left and right sides. A support shaft is fixed to the lens holder so that its both ends protrude outward, each outer end pressing part is installed in a protruding state on an outer support piece provided on the eyeglass frame, and each inner end is attached to an inner support piece. The inner surface of the eyeglass frame or the outer surface of the lens holder is provided with a locking groove having a plurality of sawtooth locking steps and a continuous long groove, and the other side is provided with a locking groove provided with a plurality of sawtooth locking steps and a continuous long groove. The eyeglasses are provided with a protrusion that is movable, and the protrusion is selectively engaged with a plurality of locking steps by pressing the outer end pressing portion of the support shaft, thereby making it possible to adjust the distance between the left and right lenses.