Foldable binocular and blank therefor
First Claim
1. A blank for a foldable binocular comprising a substantially rectangular sheet of relatively thin semi-rigid material divided by parallel foldlines into a series of rectangular panels comprisinga first rectangular panel having a first outwardly folding foldline parallel to its longitudinal axis;
- a second rectangular panel hingedly attached to said first rectangular panel along a second outwardly folding foldline, said rectangular panel having a first pair of spaced apertures for receiving a pair of ocular lenses and having a trapezoidal flap hingedly attached to each of its short sides along third and fourth outwardly folding foldlines, respectively;
a third rectangular panel hingedly attached to said second rectangular panel along a fifth outwardly folding foldline and having an intermediate sixth outwardly folding foldline parallel to its longitudinal axis; and
a fourth rectangular panel hingedly attached to said third rectangular panel along a seventh outwardly folding foldline and having first and second inwardly folding foldlines defining a central rectangular panel having a second pair of spaced apertures for receiving a pair of objective lenses and a second trapezoidal flap hingedly attached to each short side of said central rectangular panel along eighth and ninth outwardly folding foldlines, respectively;
wherein the outer end of each of said first trapezoidal flaps on said second rectangular panel is capable of interlocking with the outer end of each second trapezoidal flap on said fourth rectangular panel.
3 Assignments
0 Petitions
Accused Products
Abstract
A one-piece blank of thin semi-rigid material, such as cardboard, formed into a series of rectangular panels hingedly connected at parallel foldlines and two trapezoidal pairs of interlocking flaps, may be easily assembled to form a foldable binocular. One panel contains a pair of objective lenses and another panel contains a pair of ocular lenses. When folded, the objective lenses, and optionally the ocular lenses, are protected from scratches and smudges by a pair of rectangular flaps formed by glueing certain panels together before assembly.
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Citations
8 Claims
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1. A blank for a foldable binocular comprising a substantially rectangular sheet of relatively thin semi-rigid material divided by parallel foldlines into a series of rectangular panels comprising
a first rectangular panel having a first outwardly folding foldline parallel to its longitudinal axis; -
a second rectangular panel hingedly attached to said first rectangular panel along a second outwardly folding foldline, said rectangular panel having a first pair of spaced apertures for receiving a pair of ocular lenses and having a trapezoidal flap hingedly attached to each of its short sides along third and fourth outwardly folding foldlines, respectively; a third rectangular panel hingedly attached to said second rectangular panel along a fifth outwardly folding foldline and having an intermediate sixth outwardly folding foldline parallel to its longitudinal axis; and
a fourth rectangular panel hingedly attached to said third rectangular panel along a seventh outwardly folding foldline and having first and second inwardly folding foldlines defining a central rectangular panel having a second pair of spaced apertures for receiving a pair of objective lenses and a second trapezoidal flap hingedly attached to each short side of said central rectangular panel along eighth and ninth outwardly folding foldlines, respectively;wherein the outer end of each of said first trapezoidal flaps on said second rectangular panel is capable of interlocking with the outer end of each second trapezoidal flap on said fourth rectangular panel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification