JP2016090953A - Front part of spectacle frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front part high in flexural rigidity in a spectacle frame manufactured by punching or cutting out and bending-forming a plate such as a metal plate.SOLUTION: A connection part 3 formed at a center of a front part 1 has a front side connection piece 13 projecting to the front side and a rear side connection piece 14 projecting to the rear side and the connection part 3 is so formed as not to be easily deformed when temples 15 and 15 are opened outwardly.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a front portion of a spectacle frame formed by punching or cutting a thin plate material.

The eyeglass frame is composed of a front part and two temples, and a rim can be provided on the front part to fit a lens. And the crane is attached to the both sides of this front part so that it can fold through a joint.
FIG. 4 shows a conventional general metal spectacle frame. The front portion (A) has both rims (B) and (B) on which the lens fits, and the rims (B) and (B) are connected via a connecting member (C).

  By the way, the rim (b) constituting the front portion (b) is formed by bending a thin wire rod into a ring shape, and the connecting member (c) is manufactured by cold forming (forging), and both rims (b), ( (B) is brazed to both ends of the connecting member (c). In addition, Yoroi (d), (d) brazed on both sides of the front part (b) is L-shaped and is manufactured by cold forming. Then, the ends of the armatures (d) and (d) are connected via joints (e) and (e) so that the cranes (f) and (f) can be folded.

When such a spectacle frame shown in FIG. 4 is manufactured, the number of steps increases, and the manufacturing cost increases accordingly.
Therefore, in recent years, a thin metal plate is used as a material, and a front part obtained by stamping or cutting by wire cutting or the like is known. Individual parts are cold-formed or bent and brazed. As a result, the number of man-hours is greatly reduced and the cost is relatively low as compared to the case of manufacturing.

Of course, if punching is required, a die for punching is required. However, if mass production is required, the die cost per piece is reduced, and if the wire is cut, the production is small. However, it will be possible to adapt to the cost. And the front part manufactured by these punching processes and wire cuts has almost no dimensional error, and can manufacture a uniform front part.
On the other hand, the appearance of the front part is also slimmed down, and a well-designed spectacle frame can be constructed.

  The “glasses with a thin front frame” according to Utility Model Registration No. 305864 has a thin front frame and a smart appearance, and also has excellent lens holding stability. Therefore, a pair of left and right rims of the metal front frame produced by punching or cutting a thin metal plate are fitted into the peripheral grooves of the lens to hold each lens, and the temples can be folded at both left and right ends of the front frame. Each is hinged.

By the way, the front part manufactured using a thin metal plate has low bending strength, and when opening both the temples when wearing glasses or removing the glasses, the opening force acting on the temples acts on the front part, The front part is curved. In particular, the largest bending moment is generated at the center of the front portion. As a result, an unreasonable stress acts on the lens fitted to the rim formed on the front portion, causing a situation where the lens is chipped or cracked.
"Glasses with a thin front frame" according to utility model registration No. 305864

  Thus, the front part manufactured using a thin metal plate has the above-described problems. The problem to be solved by the present invention is this problem, and provides a front portion of a spectacle frame having high bending strength.

  The front portion of the eyeglass frame according to the present invention uses a thin plate material as a material, and this plate material is processed into a front portion having a predetermined shape by press punching or wire cutting. Here, the specific shape of the front portion is not limited, but a rim portion into which the lens is fitted is provided, and a connecting portion that connects both rim portions is provided. And the yoroi part for connecting a vine is formed in both sides, and these rim | limb parts, a connection part, and a yoroi part are formed continuously.

And the said connection part is formed in three dimensions rather than a plane, and consists of the front side connection piece and the back side connection piece. That is, a slit is provided in the connecting portion to separate the upper and lower parts, the front connecting piece protrudes to the front side, and conversely the back connecting piece protrudes to the back side. After the outer shape of the front portion is processed, the connecting portion can be press-molded to form a front side connecting piece and a back side connecting piece.
Here, the rim is not limited to a ring shape that restrains the entire circumference so that the lens can be fitted, but a half rim that can restrain the upper half of the lens, and the lower side holds the lens with water thread or the like. You can also.

  The front portion of the present invention is processed using a thin plate, and can be easily manufactured by press punching or wire cutting, as in the case of a conventional thin front portion. And the thin front part which processed the board | plate material can be slimmed, and can comprise the spectacles frame preferable in design.

  On the other hand, the front center connecting portion of the present invention has a front side connecting piece and a back side connecting piece, and the bending rigidity of this portion becomes high, and therefore a bending moment generated by pushing the temple outward when the glasses are attached / detached. The bending of the central connecting portion of the front portion is suppressed. Therefore, the lens fitted to the rim does not come off, and the chipping or cracking of the lens is prevented.

The Example which shows the connection part of the spectacles frame which concerns on this invention. The front view of the spectacles frame provided with the front part of this invention. The top view of the spectacles frame provided with the front part of this invention. Conventional general metal eyeglass frame.

FIG. 1 is an embodiment showing a front part 1 of an eyeglass frame according to the present invention, where (a) is a plan view and (b) is a front view of a state cut out from a plate material.
The front part 1 has both rim parts 2 and 2, a connection part 3, and armor parts 4 and 4, and a nose pad that is paired below the connection part 3 at the center of the front part 1. 5 and 5 are provided. The nose pad 5, 5 is formed at the tip of the leg 6, 6 extending from the rim 2, 2.

  As described above, the present invention uses a flat plate material as a material, and is stamped by a die to produce the original shape of the front portion 1 shown in FIG. Of course, the present invention is not limited to press punching, and wire cutting is also possible, and wire cutting is more suitable for the production of small rods because rather expensive dies are not required.

  Incidentally, FIG. 1 (b) shows a case of cutting out from a plate material (not limited to a metal plate), and the rim portions 2, 2, connecting portion 3, armor portions 4, 4, and nose pad pads 5, 5 are continuous with each other. And are on the same plane. If this front part 1 is pressed and bent into a curved shape, it is configured as an actual front part 1 shown in FIG.

Here, the legs 6 and 6 forming the nose pad pats 5 and 5 at the tip are bent to the back side, and the nose pad pats 5 and 5 are formed in a convex surface so as to fit the nose.
Further, instead of the nose pads 5 and 5, it is also possible to use a base for attaching a resin pad. And the slits 7 and 7 are provided in the outer side of the said rim | limb parts 2 and 2, The perimeter of the rim | limb parts 2 and 2 is expanded by opening these slits 7 and 7. FIG.

Therefore, the rim lock is fixed with the slits 7 and 7 interposed therebetween, and the lens can be fitted by enlarging the peripheral length of the rim portions 2 and 2 by loosening the screws of the rim lock. The structure of this rim lock is well known and will not be described again.
Of course, the screw of the rim lock is tightened so that the lens does not come off when the lens is fitted to the rim portion 2.

In FIG. 1A, 8 indicated by a dotted line is a front rim piece, 9 is a back rim piece, and the front rim piece 8 and the back rim piece 9 form a ring shape. And stuck on the back. The width dimensions of the ring-shaped front rim piece 8 and the back rim piece 9 are larger than those of the rim part 2, and the rim part 2 is attached to the front and back surfaces of the rim part 1 so that the rim part 2 has the front rim piece 8 and the back rim piece. It is not sandwiched between 9 and surfaced.
Of course, the front part 1 may be configured without attaching the front rim piece 8 and the back rim piece 9 to the rim part 2.

Reference numeral 10 denotes a rim lock fixed at the position of the slit. Reference numeral 11 denotes a hinge brazed to the tip of the armor portion 4 and is attached to the hinge 11 so that the crane can be folded.
In the front part 1 of the present invention, a slit 12 is provided in the connecting part 3 and the connecting part 3 is separated into the upper and lower parts.

  By the way, when the flat front portion 1 of FIG. 1B is bent as shown in FIG. 1A, the connecting portion 3 is also bent and formed into the front side connecting piece 13 and the back side connecting piece 14. That is, with the slit 12 as a boundary, the front side connecting piece 13 is projected and molded to the front side, and the back side connecting piece 14 is projected and molded to the back side. Accordingly, the connecting portion 3 has a three-dimensional shape having a predetermined thickness dimension, and the bending rigidity is greatly improved.

  2 and 3 are specific examples showing a spectacle frame including the front portion 1 of the present invention. FIG. 2 is a front view, and FIG. 3 is a plan view. Hinges 11, 11 are brazed to the tips of the end portions 4, 4 extending outward from the rim parts 2, 2, and the temples 15, 15 are attached via the hinges 11, 11. 15 can be folded.

By the way, when the glasses are worn on the face, the temples 15 and 15 are opened, but if they are pushed outward, a moment is generated, and the largest bending moment is generated in the central connecting portion 3 of the front portion 1.
In the present invention, the connecting portion 3 has a front side connecting piece 13 protruding to the front side and a back side connecting piece 14 protruding to the back side. Therefore, the connecting portion 3 has a high bending rigidity, and when attaching and detaching glasses. Even if the temples 15 and 15 are pushed open, the front portion 1 is hardly curved.

On the other hand, the long holes 16 and 16 are provided in the armor portions 4 and 4 connecting the temples 15 and 15, and therefore the bending rigidity of the armor portions 4 and 4 is low. Accordingly, the moment when the temples 15 are opened is absorbed by the armor portions 4 and 4, and the armor portions 4 and 4 can be bent and deformed.
Therefore, the lens fitted to the rim portions 2 and 2 is not detached, and the lens is prevented from being chipped or cracked.

DESCRIPTION OF SYMBOLS 1 Front part 2 Rim part 3 Connection part 4 Yoroi part 5 Nose pad 6 Leg 7 Slit 8 Front rim piece 9 Back rim piece
10 Rim lock
11 Hinge
12 Slit
13 Front side connecting piece
14 Back side connecting piece
15 crane
16 Slotted hole

Claims (2)

In a front part of a spectacle frame manufactured by punching or cutting a plate material such as a metal plate and bending it, a connecting part formed at the center of the front part protrudes to a front side connecting piece and a rear side. A front part of the spectacle frame, characterized in that a back side connecting piece is provided. 2. The front portion of the spectacle frame according to claim 1, wherein a yoke portion for attaching a temple is provided continuously on both side ends of the front portion, and a hole is formed in the armor portion to reduce bending rigidity.

Images