KR200368816Y1 - Metallic eyelet for snap fastener - Google Patents

Abstract

The object of the present invention is to provide a metal snap button eyelet manufactured by assembling two parts made of a metal head and an eyelet main body, for example, through an assembly process using a press process. The object of the present invention is to provide a metal head 2 having a circular recess 22 formed on one surface thereof so that the diameter d of the open end is smaller than the diameter D of the inner end, and the head 2 and An eyelet body (3) having a tubular shank (32) and a hatch flange portion (34) integrally with the shank portion (32) in a suit, wherein the hatch flange portion (34) By expanding and deforming radially and discoticly at the inner end of the depression 22, the head 2 and the eyelet body 3 are realized by providing a snap fastener for the metal material formed by assembling each other.

Description

Eyelet for metal snap fastener {METALLIC EYELET FOR SNAP FASTENER}

The present invention relates to a metal snap fastener eyelet, and more particularly, to a metal snap fastener eyelet manufactured to have excellent strength and durability with a small number of parts.

Typically, snap fasteners are often used to attach clothes, bags, or other items to quickly join the two parts. The snap fastener is composed of a button portion made of a male and female and an eyelet for attaching the button portion to various articles such as clothing.

The eyelets for snap fasteners are mainly made of metals, and the eyelets of these metals are excellent in their use in attaching snap fasteners to clothes and the like, and also because of their excellent physical properties such as strength and luster of metals, Usability is also great.

The eyelet has a shank portion for drilling an article such as cloth in the assembled state and a head portion externally provided integrally with the shank portion. Conventionally, the combination of the head portion and the shank portion is used for welding. Techniques for integrating together to form one eyelet have been used in the art.

However, the eyelets manufactured by the above-described techniques have problems such as severe surface defects, heavy manual labor costs, and consideration of welding conditions according to metal materials.

On the other hand, the technique which manufactures the eyelet for snap fasteners by assembling a head part, a shank part, and the connection part which connects the said head part and the shank part with each other, for example through press work, has been proposed.

However, such a prior art causes an increase in cost due to the increase in the number of parts, and also causes a problem such that the eyelet is easily broken during use due to a large drop in coupling force between the head part and the shank part in the assembled state.

Accordingly, the present invention, which is devised to solve the problems of the prior art, is a metal snap manufactured by assembling two parts of the head and the eyelet body of the metal material, for example, firmly and durable through an assembling process using press working. It aims at providing the eyelets for buttons.

1 is an exploded perspective view illustrating a state before assembly of the snap fastener eyelet according to an embodiment of the present invention.

Figure 2 is an assembled perspective view illustrating a state after assembly of the eyelet for Figure 1 snap fastener.

3A is a cross-sectional view of the snap fastener eyelet immediately before assembly.

3B is a sectional view of the eyelets for snap fasteners immediately after assembly;

Figure 4 is a flow chart showing a process for producing a snap fastener eyelet according to the present invention.

<Description of main parts of drawing>

1: eyelet 2: snap for fastener

3: eyelet main body 22: depression

32: shank portion 34: hatch flange portion

34 ': Disk flange 34a: Mild slope

34b: steep slope

An object of the present invention described above is to provide a snap fastener eyelet of a metal material for attaching a snap fastener to a predetermined article, the metal material having a circular recessed portion formed on one surface thereof so that the diameter of the open end is smaller than the diameter of the inner end. A head and a eyelet body having a tubular shank and a hatched flange portion integral with the shank portion, the shade flange portion being radially at the inner end of the depression; It is realized through the provision of eyelets for snap fasteners made of a metal material which is fixed to the depression by expanding and deforming to a disk shape.

The diameter of the open end is determined by the diameter of the tip of the hatched flange portion is smaller than the diameter of the open end of the depression, the expansion of the hatched flange portion by the press working at the inner end of the depression. It is desirable to achieve a disk structure of larger diameter.

In addition, the hatshade flange portion has a rounded shape formed at the contact with the shank portion and has an inclined surface extending from the border toward its tip, and the inclined surface is predetermined at the border with the shank portion. It is preferably composed of a steep slope leading to a critical point and a steep slope extending from the critical point to the tip of the bobbin flange.

<Example>

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view illustrating a pre-assembly state of the snap fastener eyelet 1 according to an embodiment of the present invention, Figure 2 is an assembly perspective view illustrating a post-assembly state of Figure 1 snap fastener eyelet (1). 3A and 3B are cross-sectional views illustrating states before and after assembling the eyelets 1 of FIGS. 1 and 2, respectively.

As shown in Figs. 1 to 3B, the snap fastener eyelet 1 of the present embodiment is made of a metal material such as brass, for example, with few cracks during press working, and the head 2 and the eyelet main body. It is formed through the assembly with (3).

The head 2 of this embodiment is formed by cutting a brass material to have a disk shape as a whole, and has one circular recess 22 for assembling with the eyelet main body 3 on one surface thereof, and the opposite surface thereof. Is provided with another recessed area 25 in which a logo (not shown) or the like is engraved or engraved.

The circular depression 22 of the head is formed by cutting the inner diameter of a lathe (not shown) on one surface of the head 2, and the diameter d of the open end is the diameter of the inner end. It is tapered to be smaller than (D).

On the other hand, the eyelet body 3 forms a pair with the head 2, and is directly used for coupling with a button portion (not shown) of a snap fastener through, for example, clothing or the like, and the head ( It forms a structure that one end is fixed in the depression 22 of 2).

To this end, the eyelet body 3 is provided with a tubular shank portion 32 and a hatched flange portion 34 integrally formed by a casting process. The shank portion 32 is a sharp edge (32a) is formed at the leading end to penetrate articles such as clothing, the hatched flange portion 34 is the eyelet while being integral with the shank portion (32) It is a part for coupling the main body 3 to the head 2 mentioned above.

The shaded flange portion 34 has its own tip from the vicinity of the abutment with the shank portion 32 while the diameter d ₁ of the tip is set smaller than the opening end diameter d of the recess 22 mentioned above. It has an inclined surface leading toward the shape of a hat. Further, the hatched flange portion 34 is deformed radially and in the form of a disk by press working in a state where its tip is located in the depression 22 of the head 2, and thus the disk flange portion 34 '. It has the form of and forms a structure fixed to the inner end of the head (2).

At this time, the hatched flange portion 34 has a rounding portion 33 formed with a predetermined curvature near the contact with the shank portion 32, and the rounding portion 33 is an expansion deformation of the flange portion 34. It serves to strictly limit the cracks between the flange portion 34 and the shank portion 32 caused when the.

In addition, the inclined surface of the bobbin-shaped flange portion 34 is a gentle slope (34a) and a critical point (c) of a gentle inclination α that extends from the shank portion 32 to a predetermined critical point (c) in contact with the shank portion (32). Is composed of a steep inclined surface (34b) of the steep slope (β) leading to the tip of the bushing flange portion (34). The inclined surface of the dual structure consisting of the mildly inclined surface 34a and the steeply inclined surface 34b has a wider and more stable expansion of the flange portion 34 under the tip diameter d ₁ of the hatched flange portion 34. Makes it possible. As used herein, the term "threshold point" means any point where the inclined plane angle of the hatched flange portion 34 suddenly changes significantly.

As described above, the snap-button eyelet 1 of the present invention has the hatched flange portion 34 shown in FIGS. 1 and 3A extended and radially deformed by a vertical force due to press working. Disc shaped flange portion 34 ', the disc shaped flange portion 34' being larger than the open end diameter d of the head depression 22 and even the inner end diameter of the depression 22. It has a diameter (d ₂ ) of a size similar to (D) to be firmly fixed in the depression 22 of the head (2) to be assembled in the form shown in Figures 2 and 3b.

FIG. 4 is a flowchart illustrating a manufacturing process of the above-described metal snap button eyelets. Hereinafter, a manufacturing process of the snap button eyelets according to the present invention will be described with reference to FIG. 4.

As shown in FIG. 4, the eyelet manufacturing process of the present embodiment includes a part forming step S1 for forming and forming a metal head 2 and an eyelet body 3 of metal, respectively, the head 2 and eyelet. An assembling preparation step (S2) for arranging the main body (3) to a predetermined position; and an assembling step (S3) for assembling the head (2) and the eyelet main body (3) using an arbitrary press.

In the component forming step (S1), the head 2 and the eyelet body 3 are formed by lathe processing and casting, respectively. At this time, the head 2 is manufactured by forming a tapered recess 22 on one surface such that the diameter D of the inner end is larger than the diameter d of the open end on the disk of the brass material. The eyelet body 3 is integrally formed with a hatched flange portion 34 having a tip diameter d ₁ smaller than the open end diameter d of the head 2 and its hatched flange portion 34. It is manufactured by casting a brass to have a tubular shank portion 32 to form.

The assembling preparation step (S2) supports the head (2) with a jig (J) and then places a hat-shaped flange portion (32) on the depression (22) of the head (2) of the head (2). Through the process of setting up the eyelet body 3 on the depression 22.

Finally, the assembling step (s3) by hitting the hatched flange portion 34 using a tubular punch (P) having a hollow of the inner diameter larger than the outer diameter of the shank portion 32 of the eyelet body (3), It is made through the process of fixing the hatch flange portion 34 to the inner end of the head (2) by expanding and deforming radially and disc-shaped. In this assembling step (S3), the tubular punch (P) passes through the shank portion (32) through its own hollow, and its front end surface strikes the hatch flange portion (34).

At this time, it is preferable that the head 2 is formed in a disk shape, and the logo is formed on the other surface of the head 2 on which the depression 22 is formed in an intaglio or embossed form. In addition, the manufactured snap button eyelet 1 is used as an accessory of the snap button after the plating process.

As described above, the present invention makes it possible to provide an eyelet for a snap button that is durable, robust and free from surface defects, using only two parts consisting of an eyelet body and a head.

In particular, the present invention provides an effect of solving the problem that the eyelet body is separated from the head by being firmly coupled to the eyelet body and the head.

In addition, the present invention allows the flange portion of the eyelet main body to have a double slope composed of a mild slope and a steep slope, which makes it possible to expand more stably and broadly when the flange portion is hit within the depression of the head.

Claims (3)

In the eyelet 1 for a snap fastener made of metal for attaching a snap fastener to a predetermined article, A metal head 2 having a circular recess 22 formed on one surface thereof so as to have a tapered shape such that the diameter d of the open end is smaller than the diameter D of the inner end; And And an eyelet body (3) having a tubular shank (32) and a hatch flange (34) integrally with the shank (32), forming a pair with the head (2), The hatched flange portion 34 is extended and deformed radially and discoidally at the inner end of the depression 22, characterized in that the head 2 and the eyelet body 3 is assembled to each other Eyelets for snap fasteners made of metal. The method of claim 1, The hatched flange portion 34 has its tip diameter d ₁ smaller than the open end diameter d of the depression 22, For the snap fastener of the metal material characterized in that the hatched flange 34 is expanded deformation by press working at the inner end of the depression 22 to form a disk structure of a diameter larger than the open end (d) Eyelet. The method of claim 1, The hatched flange portion 34 has a rounded surface 33 formed at the contact with the shank portion 32 and has an inclined surface extending from the border toward its tip, thereby forming the above hatched structure. The inclined surface is a gentle slope 34a extending from the shank portion 32 to a predetermined critical point c and a steep slope 34b extending from the critical point c to the tip of the hatched flange portion 34. Eyelets for snap fasteners made of metal, characterized in that consisting of).