JPH0132016Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to opera glasses that can be assembled by folding a single sheet.

Prior Art and Its Problems In the case of simple opera glasses made of paper or the like, they are made in the form of a simple box in order to reduce costs as much as possible. For this reason,
The back edge of the opera glasses came into contact with the nose when held against the eyes, making it inconvenient to use.

Therefore, the present inventor has proposed a V-shaped concave part formed on the eyepiece side of the opera glasses to escape the nose, as shown in Fig. 1. The drawback was that it was not possible to fold opera glasses using a single piece of mount, and the production process was labor-intensive and expensive.

Purpose of the present invention The purpose of the present invention is to propose opera glasses that can be manufactured by folding up a single sheet and have a V-shaped recess formed on the eyepiece side to escape the user's nose. .

Structure of the Present Invention As a means of achieving the above object, the present invention provides a structure in which the unfolded state of a single sheet has the same width as the front surface to which the objective lens is attached and the front surface extending behind the front surface via a fold line. A bottom surface provided with an insertion slit and a V-shaped fold, tapered left and right side surfaces extending through a fold line on the left and right sides of the front, and a fold line formed on the rear of the left and right sides. A fold-out piece is attached to the folded piece, a sleeve piece is attached to the front of the left and right sides via the fold line, and the sleeve piece is extended further forward through the fold line, and the outer edge is attached via the fold line. A fold-in piece with an extended tongue and a V formed on the outside between the sleeve piece and the fold-in piece.
a letter-shaped notch, an upper surface extending in front of the front surface through a fold line, a rear surface to which an eyepiece is attached extending further forward of this upper surface through a fold line, and a rear surface that is folded to the left and right of this rear surface. A folding piece extending through the line, a cutting piece extending further forward of the rear surface through the folding line, a tongue piece formed at the tip of this folding piece, and a tongue piece formed at a constant interval in the center of the rear surface. To propose an opera glass comprising a cutout, a concave part formed by protruding two triangular pieces in opposite directions from the fold line through a V-shaped fold line on one side of the upper surface and the fold line.

Embodiment FIG. 2 shows an embodiment of the present invention, in which a sheet of mount is unfolded and shows a front surface 1 with objective lenses 2, 2' attached, and an extension to the rear of this front surface 1 via a fold line a. A bottom surface 3 having the same width as the front surface 1 and provided with an insertion slit 4 and a V-shaped notch 5; and tapered left and right side surfaces extending from the left and right sides of the front surface 1 via the fold line a. 6, 6', fold-in pieces 7, 7' attached to the rear of the left and right sides 6, 6' via the fold line a, and left and right sides 6,
A sleeve piece 8 attached to the front of 6' via a fold line a,
8', and a fold-in piece 9 with tongue pieces 9a and 9b extending further forward of the sleeve pieces 8 and 8' through the fold line a and extending through the fold line a at the outer end.
9', V-shaped cuts 10, 10' formed on the outside between the folded pieces 9, 9' of the sleeve pieces 8, 8',
An upper surface 11 extending in front of the front surface 1 via a fold line a, and a fold line a further forward of this upper surface 11.
A rear surface 12 to which eyepiece lenses 13, 13' are attached, extending through the rear surface 12, and folding pieces 14, 14' extending from the left and right sides of the rear surface 12 through fold lines a.
A folded piece 15 extending further forward of the rear surface 12 via the fold line a, a tongue piece 16a formed at the tip of this folded piece 15, and the center of the rear surface 12 cut out at regular intervals. 11 and the V on the folded piece 15 side
A letter-shaped fold line a is inserted, and triangular pieces 16, 16' and 17, 1 are formed in opposite directions from this fold line a.
A concave forming portion 18 formed by protruding two pieces of 7' each.
It consists of. Note that the mount 1 may be made of other materials than paper.

Next, a method for assembling opera glasses by folding the unfolded mount will be explained.

First, the front 1 with the objective lenses 2 and 2' attached.
With the bottom facing down, the bottom surface 3 and left and right side surfaces 6, 6' are bent along the fold line a and each is stood vertically. Next, fold the sleeve pieces 8, 8' attached to the left and right side surfaces 6, 6' horizontally by 90 degrees along the fold line a, and further fold the folded pieces 9, 9' by 90 degrees along the fold line a. Set it to the state shown in the figure.

Next, fold up the top surface 11 vertically along the fold line a, and then fold the rear surface 12 horizontally by 90 degrees along the fold line a, and fold the folded piece 15 along the fold line a.
Bend it 90 degrees downward and insert the tongue piece 16a into the slit 4.

Next, the folded pieces 9, 9' exposed in the concave forming part 18 are folded so as to cover the triangular pieces 16, 16', 17, 17', respectively.
b into the gap 20 on the rear surface 12 and stop. FIG. 4 shows this state.

Effects of the present invention As described above, the present invention allows opera glasses with recesses to be assembled using a sheet-like material made by cutting out a piece of mount, making it easy to manufacture and reducing production costs. This has the effect of making it cheaper. Furthermore, it is convenient for transportation because it can be unfolded and formed into a single sheet.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of opera glasses according to the present invention;
Figure 2 is a developed view of the opera glasses, and Figures 3 and 4 are illustrations of how to assemble them. 1... Front, 3... Bottom, 6, 6'... Left and right sides, 8, 8'... Sleeve piece, 9, 9'... Fold-in piece,
11...Top surface, 12...Rear surface, 15...Folded piece,
a...Fold line.

Claims (1)

[Scope of utility model registration request] When a single sheet is unfolded, the front side with the objective lens attached thereto has the same width as the front side extending through the fold line behind this front side, and has an insertion slit and a V-shaped cut. The bottom and
Tapered left and right side surfaces extending through the fold lines to the left and right of the front, folding pieces attached to the rear of the left and right sides via the fold lines, and fold lines in front of the left and right sides. A sleeve piece attached through the sleeve piece, a fold-in piece with a tongue piece extending further forward of the sleeve piece through the fold line and extending through the fold line at the outer end, and a fold-in piece between the sleeve piece and the fold-in piece. a V-shaped notch formed on the outside of the front surface, an upper surface extending through the fold line in front of the front surface, and a rear surface attached with an eyepiece extending further forward of the upper surface through the fold line; , a folding piece extending from left to right of the rear surface via the folding line, a folding piece extending further forward from the rear surface via the folding line, a tongue piece formed at the tip of this folding piece, and the rear surface. A concave portion is formed by cutting out the center at regular intervals, making a V-shaped fold line on the top surface and one side of the fold, and having two triangular pieces protrude from the fold line in opposite directions;
Opera glasses consisting of.