JP4072406B2 - Thin metal frame glasses - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to eyeglasses using a metal frame.
[0002]
[Prior art]
[Patent Document 1]
JP 2000-249988 A [Patent Document 2]
Japanese Patent Laid-Open No. 08-304742
Glasses are composed of many parts. Although it depends on the type of glasses, in general, the main components of glasses are the lens, the rim for fixing the lens, the bridge connecting the left and right lenses, and the purpose of stabilizing the glasses and when the edge of the glasses (front frame) hits the nose Pads that soften the bumps, pad feet that connect the pad and the front frame, temples to stabilize the glasses on the face, chi that connects the temple and the front frame, when the temple end (the part that hangs on the ear) hits the ear There are hinges that make up the hinge mechanism of the temple that modernizes the impact of the temple. In order to connect the respective parts, various methods such as screwing, brazing, adhesive fastening, fitting, caulking, and tacking are adopted depending on the parts and types of glasses.
[0004]
The purpose of use of eyeglasses is to correct vision, but there is no single purpose of use, such as fashionable so-called Date spectacles or eye protection from sun rays like sunglasses. To reduce the weight, reduce the number of parts, add a decorative part that is different from the original purpose of the eyeglasses to create a luxurious appearance, or eliminate the lens rim to widen the field of view. Various glasses are made for each purpose.
[0005]
By reducing the number of eyeglass parts, advantages such as cost reduction, weight reduction, and simplification of the assembly process can be obtained. Many low-cost eyeglasses are made of synthetic resin and have a front frame (front frame) in which a rim and a bridge are integrally formed. “Thin-built thin spectacles front frame and manufacturing method by punching and twisting the spectacles front frame” (Patent Document 1) aims to improve the efficiency of the front frame manufacturing process and tough, thin and light spectacle front frame The eyeglass frame manufacturing method is mentioned. In this published patent, a metal plate is punched to manufacture a front frame (a frame in which right and left rims, bridges, and brackets are referred to as brackets in the publication), and a temple is also manufactured by punching the same metal. The bracket is cut so that the rim can be slightly opened up and down, the rim is fitted into the groove of the lens with a groove on the periphery, and the bracket is closed to fix the lens to the rim. Furthermore, the eyeglasses are assembled by connecting the hinges to the temples with brackets.
[0006]
In “Fiber Reinforcement for Glasses Frame and Method for Producing the Same” (Patent Document 2), high-strength fibers are organized in a braid shape, and the entire spectacle frame (rim, bridge, temple) is integrally formed with the braid A method for manufacturing a spectacle frame is mentioned.
[0007]
[Problems to be solved by the invention]
Presbyopia progresses with age. Unlike myopia, presbyopia usually does not require glasses (myopia is presbyopia, but here we talk about hyperopia). Recently, there are glasses for both near and far, but usually there is resistance to wearing glasses at all times. When I first became presbyopic, many people use a magnifying glass instead of glasses only to see small letters and small details. However, as the degree of hyperopia progresses, it becomes inconvenient with a loupe and has to use glasses. However, unlike people with myopia, people with farsightedness who are not so advanced need only to look at letters and details, so they carry them around like glasses.
[0008]
I often forget it because I don't wear it all the time. Even when at home, it is rare to carry from room to room. For this reason, it is often misplaced and searched with a single pair of glasses. Recently, eyeglasses have become cheaper, and an increasing number of people use a plurality of eyeglasses at each location. For example, some reading glasses for living room, study, bedroom, and portable are prepared. This way, you don't have to go to other rooms to get your glasses, and you won't forget it when you go out.
[0009]
The problem to be solved by the present invention is to provide a method for manufacturing a spectacle frame having a structure that is thin, light and durable, has few parts, and keeps the production cost low, and spectacles assembled with the frame. It is to be.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is a pair of spectacles made of a metal frame formed by punching or cutting a thin plate. (1) The lower rim, bridge, and temple are integrated, and the temple and provided bent connecting portion provided with a slit between the lower rim arranged bending the temple to the bridge side and the upper rim in the right and left separate, molded by punching or cutting from sheet metal, respectively, ( 2) A lens fixing fitting locking portion is provided near the bridge and temple of the lower rim, and a lens fixing fitting locking portion is provided at a position corresponding to the lens fixing fitting locking portion of the upper rim. The lower rim and the upper rim are fitted into the groove of the spectacle lens having a groove on the periphery, and the lens fixing fitting locking portions provided respectively corresponding to the upper rim and the lower rim are fitted. A sheet metal frame glasses, characterized in that to fix the lens.
[0011]
The invention described in claim 2 is the sheet metal frame glasses according to claim 1, wherein a grooved nose pad is fitted and fixed to the lower rim.
[0012]
The invention described in claim 3 is the sheet metal frame glasses according to claim 1 or 2, wherein the sheet metal is a nickel titanium alloy.
[0013]
In the present invention, a thin metal is processed to reduce the number of parts, and a spectacle structure that does not require screwing, brazing, adhesive use, or the like is obtained. For this purpose, the sheet metal is sheared, the lower rim, the bridge, and the temple are integrally formed, and the upper rim for fixing the spectacle lens together with the lower rim is formed in a separated form. As a shearing method, a method of punching a metal plate (die cutting press) or cutting (cutting by NC <numerical control> using a laser or the like) is used.
[0014]
The spectacle frame of the present invention is formed from a thin metal plate. There are methods of stamping and cutting for molding. The parts cut out from the metal plate when manufacturing a pair of eyeglasses are composed of a total of three points: a main part in which the lower rim, the bridge and the temple are integrated, and an upper rim (two on the left and right) for fixing the lens. Since the lower rim is cut out in a form connected by a bridge, a connecting step between the bridge and the rim is unnecessary. Since the temple and the lower rim are also cut out integrally, there is no need for a rim lock or chin, and there is no need to connect the rim and the temple.
[0015]
The upper rim is molded separately to make it easier to fix the lens. In order to stably fix the lens with the rim, a groove is formed on the periphery of the lens, the upper rim and the lower rim are fitted into the groove on the periphery of the lens, and the lens is fixed by pressing with the upper rim and the lower rim. However, in this state, the upper rim and the lower rim are not fixed, so there are groove holes or the like as fitting locking parts at both ends of the lower rim (two locations on the bridge side and temple side, and a total of four locations on the left and right lower rims). Protrusions or the like are provided at both ends of the rim, and both are fitted so that the upper rim and the lower rim are not separated.
[0016]
The bridge is formed integrally with the lower rim. Because the bridge is made of metal, it can be painful if you hit the nose directly for a long time. Therefore, a nose pad can be attached along the peripheral shape of the bridge. There is a method in which a groove for inserting into the bridge is formed in the nose pad, and the groove is inserted into the edge of the bridge.
[0017]
The temple is formed integrally with the lower rim. The temple is for fixing the glasses to the face with the face sandwiched by bending. It uses only the elastic force of metal, and when not in use (when removed from the face), it is folded by the elastic force (metal spring force). That is, the portion where the slit between the temple and the lower rim is inserted forms a spring hinge mechanism. The connecting portion between the temple and the lower rim is plate-shaped, and twisting occurs when the temple is opened. Therefore, several slits are inserted in the connecting portion between the temple and the lower rim to facilitate twisting.
[0018]
The eyeglasses of the present invention should be as thin as possible when folded, and convenient when carried around. When assembled to the glasses, it is preferable that the temples overlap with each other in contact with the periphery of the upper rim. In other words, in a folded state, it is ideal to design the temple, the upper rim, the lens, and the lower rim so that they are aligned on the same plane without any gap. Therefore, when the lens is fixed with the upper rim and the lower rim, the temple is sheared so that the temple overlaps with the upper edge of the upper rim. As a result of the above shearing, the left and right temple ends are in contact with each other when the temple is folded.
[0019]
Therefore, the temple is slightly shorter than normal glasses. The structure is such that the temple end is part of the earlobe, and the glasses are basically stabilized on the face by sandwiching the face with the elastic force of metal. For this reason, when the metal part directly touches the skin, the touch is not good, and the metal part becomes slippery. Therefore, the area that corresponds to the temple temple is formed wider, and the interior is cut through, and the pad is inserted into the cut-out portion. A synthetic resin such as rubber or silicon resin is used as a material for the pad.
[0020]
Various materials are conceivable as the metal plate, but a nickel titanium alloy (NT material) is suitable as a material that is strong even with a thin plate and does not cause allergies. The NT material is elastic, resistant to rust, and lightweight, so that it is an optimal material for achieving the gist of the present invention.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing components of the thin metal frame eyeglasses of the present invention. The lower rim 1, the temple 3, and the bridge 4 are integrally sheared from a metal thin plate, and the upper rim 2 is sheared from the metal plate. As the shearing method, die cutting with a press or cutting with NC can be used. Although not shown in this figure, the only other necessary parts for the glasses are a temple pad and a lens. The nose pad 5 is a portion that hits the nose, and those made of silicon-based resin are suitable for the softness of the hit. The temple pad is made of the same material as the nose pad and is inserted into the hole 320 for the temple pad.
[0022]
The lens is fixed between the lower rim and the upper rim. FIG. 2 is a perspective view showing a state when the lens is fixed to the rim. A groove 610 is carved along the periphery of the lens 6, the lower rim 1 is inserted into the groove at the bottom of the lens, and the upper rim 2 is inserted into the groove at the top of the lens. However, since the lens cannot be stably fixed in this state, the convex portions 211 and 212 are provided at both ends of the upper rim, and the groove holes 111 and 112 are provided at both ends of the lower rim. Insert the part into the slot. As described above, the lens is stably fixed by the upper and lower rims.
[0023]
The temple 3 and the lower rim 1 are connected by a connecting portion 310. The connecting portion also serves as a hinge mechanism. In the state of a single metal plate, not only a force is applied when the temple is opened and closed, but also a strain is applied to the metal because of twisting. Therefore, as shown in FIG. 1, a gap (slit-like cavity 330) is provided in the connecting portion that moves from the lower rim to the temple, and crescent-shaped slits 311 and 312 are opened in the bent portion of the connecting portion. The outer slit 311 is structurally longer than the inner slit 312. FIG. 3 shows a state in which the temple is opened. When the temple is opened, a force is applied to the connecting portion. Since the notched portion (slit portion) absorbs and disperses this force, the load applied to the connecting portion is reduced. Moreover, since there is a slit, the temple is easy to open. When the glasses are attached to the face, the temples sandwich the face by the elastic force of the metal, and the glasses are stably attached to the face. If it is removed from the face, it will return to its original shape by the elastic force of the metal. That is, the hinge mechanism formed by the connecting portion is a spring hinge mechanism that uses the elastic force of metal. FIG. 4 conceptually illustrates the state when the temple is opened. Although it depends on the metal material used, the temple 3 is generally opened in the shape of a bow in the case of thin metal with elasticity. When the temple is hung on the face in an open state and released, the temple is in a state of pressing the face at the position of the pad hole 320 (see FIG. 1).
[0024]
FIG. 5 is a completed view of the glasses of the present invention. The temple 3 is in a closed state (folded state), and the temple is superimposed on the upper rim 2 in a state of being in contact with the peripheral edge. That is, in the state where the temple is closed, the thickness of the glasses becomes ultrathin glasses with only the thickness of the metal plate and the lens. FIG. 6 is a cross-sectional view of the slot 111 in FIG. 5, in which the convex portion 211 of the upper rim 2 is bent at a right angle and inserted into the slot 111 so that the upper rim cannot be removed. Since the rim is fitted in the groove of the lens, the lens can still be stably fixed. In order to make it stronger, the upper rim and the lower rim are perfectly fixed by making the convex part slightly longer as shown in FIG. 7 and bending the part protruding from the slot. When the NK material is used as a metal plate, it can be sufficiently strong with a thickness of about 0.2 mm (thickness of about a prepaid card), so the protruding portion in FIG. 7 does not matter.
[0025]
FIG. 8 is a cross-sectional view of the lens when cut at substantially the center in FIG. The lower rim 1 and the upper rim 2 are fitted in a groove 610 cut in the periphery of the lens 6, and the temple 3 is in contact with the upper rim 2. It is preferable to design the temple and the upper rim so that the temple and the upper rim are in perfect contact with each other, but a slight gap may be opened depending on the portion.
[0026]
In FIG. 5, a nose pad 5 and a temple pad 321 are parts that touch the skin, and are parts using materials such as rubber and synthetic resin. In the present invention, a silicon-based resin is suitable. As can be seen, the temple is shorter than normal glasses. Therefore, rather than holding the temple around the ear and stabilizing it, the face (around the temple) is sandwiched by the elastic force of the metal. In order to fix the glasses to the face at the three points of the left and right temple pads and the nose pad, a structure in which the temple pad hole is designed to be large and the frictional force is increased is preferable. In addition, the above-mentioned silicone resin is suitable as a material that softens the contact with the skin and generates frictional force.
[0027]
【The invention's effect】
The thin metal frame eyeglasses of the present invention are characterized in that they have a small number of parts, and are small, light and thin. There are a total of 8 parts: 1 point for the lower rim, temple bridge, 2 points for the left and right upper rims, 2 points for the left and right lenses, 1 point for the nose pad, and 2 points for the left and right temple pads. Since the former three points, that is, the spectacle frame, are formed from a single metal plate, mass production is easy if performed by punching or cutting. Assembling of the parts is only done by fixing the left and right lenses and fitting the nose pads and the left and right temple pads, so there is no need for screwing, brazing, caulking, bonding with adhesives, etc. (Amateurs can purchase only parts and assemble glasses). The hinge mechanism that opens and closes the temple is a simple one that uses the elasticity of metal, so there is no need for hinges or screws. For this reason, it is possible to provide the customer with extremely lightweight and low-cost glasses.
[0028]
When nickel titanium alloy (NT alloy) is used as a metal plate, sufficient strength can be maintained even with a plate thickness of about 0.2 mm. And since it is rich in elasticity, the connection part of the flame | frame which cut out the lower rim and the temple integrally can be used as a spring hinge mechanism. When the temple is closed, the temple comes into contact with the upper rim, and the left and right temple ends come into contact with each other, so that the glasses are compact like a loupe. It is an ultra-thin spectacle that is only the thickness of the lens and metal plate (basically the maximum thickness of the lens), making it a compact and lightweight spectacle that is convenient to carry.
[0029]
As mentioned earlier, people with presbyopia usually don't have to wear glasses. If it is, it will be in the way, but if it is not, it will be troubled with reading glasses. For this reason, reading glasses are often misplaced. I often use it at home, leave it at home, and go out without glasses. In order to solve this problem, presbyopic people have a plurality of spectacles, and decide to use them anywhere in the house or for going out. Since the thin metal frame eyeglasses of the present invention are low in cost, there is little economic burden even if a plurality of sheets are purchased, and a plurality of sheets can be purchased and placed for each place. The glasses are extremely thin and light, so you can keep them out of the way if you leave them in a bag. Since it is strong with a metal frame, it is unlikely to break immediately at the hinges like the inexpensive plastic glasses that have been around recently. It is an attractive feature of the thin metal frame glasses of the present invention that it can be easily used as a loupe and can be used as glasses.
[Brief description of the drawings]
FIG. 1 is a plan view for explaining a thin metal frame spectacle component of the present invention.
FIG. 2 is a perspective view for explaining a method of fixing a lens with a lower rim and an upper rim of thin metal frame glasses of the present invention.
FIG. 3 is a perspective view for explaining a hinge mechanism of the thin metal frame eyeglasses of the present invention.
FIG. 4 is a plan view (a diagram showing only a skeleton) for explaining the shape of the temple when the temple of the thin metal frame glasses of the present invention is opened.
FIG. 5 is a plan view for explaining a completed state of the sheet metal frame glasses of the present invention.
FIG. 6 is a cross-sectional view for explaining how to fix the upper rim to the lower rim in the thin metal frame glasses of the present invention.
FIG. 7 is a cross-sectional view for explaining how to fix the upper rim to the lower rim in the sheet metal frame glasses of the present invention.
FIG. 8 is a cross-sectional view of the thin metal frame eyeglasses of the present invention when the temple is closed and cut near the center of the lens.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower rim 111 Groove hole 112 Groove hole 2 Upper rim 211 Convex part 212 Convex part 3 Temple 310 Connection part (hinge part)
311 Slit 312 Slit 320 Pad hole (cavity)
321 pad (pad for temple)
330 slit-like cavity 4 bridge 5 nose pad 6 lens 610 groove (lens peripheral groove)

Claims (3)

In eyeglasses consisting of a metal frame made by punching or cutting a thin plate,
(1) A lower rim, a bridge, and a temple are integrated, and a bent connection part having a slit is provided between the temple and the lower rim so that the temple is bent to the bridge side, and the upper rim is separated into left and right parts, respectively. It is formed by punching or cutting from a thin plate,
(2) A lens fixing fitting locking portion is provided near the bridge and temple of the lower rim, and a lens fixing fitting locking portion is provided at a position corresponding to the lens fixing fitting locking portion of the upper rim. The lower rim and the upper rim are fitted into the groove of the spectacle lens having a groove formed in the lens, and the lens fixing fitting locking portions provided respectively corresponding to the upper rim and the lower rim are fitted to fit the lens. Thin metal frame eyeglasses characterized by being fixed.   2. The thin metal frame glasses according to claim 1, wherein a grooved nose pad is fitted and fixed to the lower rim.   3. The thin metal frame glasses according to claim 1, wherein the thin metal is a nickel titanium alloy.

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