What is claimed is:
1. A case connection structure for connecting a first case member having a first connection end portion and a second case member having a second connection end portion corresponding to the first connection end portion of the first case member in a connection direction, the case connection structure comprising:
a boss portion provided to protrude from one of the first and second connection end portions toward the other one of first and second connection end portions in the connection direction, the boss portion having a slit;
a recess portion provided in the other one of the first and second connection end portions, into which the boss portion is fitted; and
a press-fitting portion provided in the recess portion, wherein,
when both the first and second case members are connected in the connection direction, the boss portion is fitted into the recess portion, and the press-fitting portion is press-fitted into the slit to press-expand the boss portion to an outer side, in such a manner that an outer wall surface of the boss portion press-contacts an inner wall surface of the recess portion.
2. The case connection structure according to claim 1, wherein the press-fitting portion has a taper portion for increasing a press-expanding amount of the boss portion to the outer side, the press-fitting portion being tapered toward the boss portion.
3. The case connection structure according to claim 2, wherein:
the press-fitting portion is disposed to protrude from a bottom surface of the recess portion to have a base portion on the bottom surface;
the taper portion is provided on the base portion; and
the press-fitting portion has a top taper portion at a top end of the press-fitting portion, the top taper portion having a radial dimension smaller than that of the taper portion on the base portion.
4. The case connection structure according to claim 1, wherein:
the press-fitting portion is disposed to protrude from a bottom surface of the recess portion to have a base side on the bottom surface and a protrusion top side; and
the taper portion is provided at both the base side and the protrusion top side in the press-fitting portion.
5. The case connection structure according to claim 1, further comprising a connection member for integrally connecting both the first and second case members after the boss portion is fitted into the recess portion.
6. The case connection structure according to claim 5, wherein the connection member is a screw member.
7. The case connection structure according to claim 1, wherein:
the boss portion has an approximate cylindrical shape;
the slit is provided to penetrate through a center portion of the approximate cylindrical shape and to extend in the connection direction;
the slit has a circular portion at the center portion; and
the press-fitting portion has a body portion formed into a cylindrical shape, the boss portion being press-fitted into the circular portion.
8. The case connection structure according to claim 7, wherein the press-fitting portion has a taper portion at a base portion of the body portion, for increasing a press-expanding amount of the boss portion.
9. The case connection structure according to claim 1, wherein:
the boss portion is molded integrally with one of the first and second case members using a resin; and
the recess portion and the press-fitting portion are molded integrally with the other one of the first and second case members using a resin.
10. The case connection structure according to claim 1, wherein:
the boss portion has an approximate cylindrical shape;
the slit is provided to extend in the connection direction by a predetermined dimension and to division the boss portion into two parts in the predetermined dimension; and
the press-fitting portion is press-fitted into the slit to increase a press-expansion amount of the boss portion in a direction perpendicular to the connection direction.
11. The case connection structure according to claim 10, wherein:
the slit has a circular recess recessed to a radial outer side at a center portion of the approximate cylindrical shape; and
the press-fitting portion is press-fitted into the circular recess.
12. The case connection structure according to claim 11, wherein:
the press-fitting portion has a top taper portion tapered toward a top end of the press-fitting portion, a body portion extending from the top taper portion to have a certain radial dimension, and a base taper portion tapered from a base portion of the press-fitting portion to the body portion;
a top part of the top taper portion has a radial dimension smaller than that of the circular recess;
the body portion has a radial dimension larger than that of the circular recess; and
the base taper portion has a radial dimension gradually increasing from the body portion toward the base portion.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. Reversible headband eyeglasses comprising:
a reversible body includes a double nose bridge, a first lens retainer, a first support arm, a second lens retainer and a second support arm, said reversible body having a substantial headband shape, said double nose bridge includes a bottom concave surface and a top concave surface, one end of said first lens retainer extends from one side of said double nose bridge, one end of said second lens retainer extends from the other side of said double nose bridge, said first support arm extends from the other end of said first lens retainer, said second support arm extends from the other end of said second lens retainer;
a first eyeglass lens is retained in said first lens retainer; and
a second eyeglass lens is retained in said second lens retainer.
2. The reversible headband eyeglasses of claim 1, wherein:
said first and second concave surfaces are sized to receive a bridge of a human nose.
3. The reversible headband eyeglasses of claim 1, wherein:
said first and second eyeglass lenses are spaced apart for a pair of human eyes.
4. The headband eyeglasses of claim 1, wherein:
a plurality of first openings are formed through said first support arm, a plurality of second openings are formed through said second support arm.
5. The headband eyeglasses of claim 4, wherein:
said plurality of first openings are created by a plurality of first strands that are contained in said first support arm, said plurality of second openings are created by a plurality of second strands that are contained in said second support arm.
6. The headband eyeglasses of claim 1, further comprising:
said substantial headband shape is sized to fit around a top of a human head in a substantially vertically orientation.
7. The headband eyeglasses of claim 1, further comprising:
said reversible body is fabricated from a material having memory.
8. Reversible headband eyeglasses comprising:
a reversible body includes a double nose bridge, a first lens retainer, a first support arm, a second lens retainer and a second support arm, said reversible body having a substantial headband shape, said double nose bridge includes a bottom concave surface and a top concave surface, one end of said first lens retainer extends from one side of said double nose bridge, one end of said second lens retainer extends from the other side of said double nose bridge, said first support arm extends from the other end of said first lens retainer, said second support arm extends from the other end of said second lens retainer, said reversible body is fabricated from a material having memory;
a first eyeglass lens is retained in said first lens retainer; and
a second eyeglass lens is retained in said second lens retainer.
9. The reversible headband eyeglasses of claim 8, wherein:
said first and second concave surfaces are sized to receive a bridge of a human nose.
10. The reversible headband eyeglasses of claim 8, wherein:
said first and second eyeglass lenses are spaced apart for a pair of human eyes.
11. The headband eyeglasses of claim 8, wherein:
a plurality of first openings are formed through said first support arm, a plurality of second openings are formed through said second support arm.
12. The headband eyeglasses of claim 11, wherein:
said plurality of first openings are created by a plurality of first strands that are contained in said first support arm, said plurality of second openings are created by a plurality of second strands that are contained in said second support arm.
13. The headband eyeglasses of claim 8, further comprising:
said substantial headband shape is sized to fit around a top of a human head in a substantially vertically orientation.
14. Reversible headband eyeglasses comprising:
a reversible body includes a double nose bridge, a first lens retainer, a first support arm, a second lens retainer and a second support arm, said reversible body having a substantial headband shape, said double nose bridge includes a bottom concave surface and a top concave surface, said first and second concave surfaces are sized to receive a bridge of a human nose, one end of said first lens retainer extends from one side of said double nose bridge, one end of said second lens retainer extends from the other side of said double nose bridge, said first support arm extends from the other end of said first lens retainer, said second support arm extends from the other end of said second lens retainer;
a first eyeglass lens is retained in said first lens retainer; and
a second eyeglass lens is retained in said second lens retainer.
15. The reversible headband eyeglasses of claim 14, wherein:
said first and second eyeglass lenses are spaced apart for a pair of human eyes.
16. The headband eyeglasses of claim 14, wherein:
said reversible body is fabricated from a material having memory.
17. The headband eyeglasses of claim 14, wherein:
a plurality of first openings are formed through said-first support arm, a plurality of second openings are formed through said second support arm.
18. The headband eyeglasses of claim 17, wherein:
said plurality of first openings are created by a plurality of first strands that are contained in said first support arm, said plurality of second openings are created by a plurality of second strands that are contained in said second support arm.
19. The headband eyeglasses of claim 14, further comprising:
said substantial headband shape is sized to fit around a top of a human head in a substantially vertically orientation.