SLIP-RESISTENT SHOELACE

Abstract

A slip-resistant shoelace of the present invention includes a body having an external tube. The external tube is manufactured by weaving. Each of Pluralities of sections of a cavity of the external tube is filled with a center core respectively. The center cores are arranged at intervals to be discontinuous. Thus, sections having the center core are solid, and sections without the center core are hollow. The hollow sections can be used to be disposed in a shoelace hole stably or to be tied and knotted tightly. Thereby, the slip-resistant shoelace of the present invention can prevent the knot from slipping.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a shoelace, more especially to a slip-resistant shoelace.

2. Description of the Prior Art

A conventional shoelace after being knotted is easy to slip when being torn by external force. A slipped shoelace brings about danger.

Pluralities of slip-resistant shoelaces are disclosed in prior art. A typical form is disclosed in the patents TW M479474, TW M240854, TW 253245, and TW

M337982. A solid shoelace is arranged with thick sections and thin sections at intervals, wherein the thin sections can be replaced by flat sections. If the shoelace is tied and knotted at the thin sections, the shoelace is unable to slip due to blocking by the thick sections when being torn by external force. A more specific form disclosed in TW M339939 and U.S. Pat. No. 5,946,779 defines that the thin sections have density larger than the thick sections.

However, the structures mentioned above have some problems. First, the shoelace has a ragged appearance due to the thick and the thin sections arranged at intervals. Moreover, to obtain the thick sections, material needed for weaving is more than normal uniform shoelaces. Besides, the shoelace with various diameters is difficult to manufacture, and it is also time-consuming. Manufacture of shoelace with sections of different density is even more difficult.

On the other hand, a structure with no difference in thickness in appearance is disclosed in U.S. Pat. No. 3,110,945. A hollow external tube is filled with a continuous core, wherein pluralities of protrusions are disposed on the core. For example, the protrusions can be formed by knotting of the core directly. This kind of shoelace can achieve the goal of slip-resist. However, the core is continuous. In other words, the core exists at any position of the shoelace. Thus, the shoelace can be knotted tight enough. Also, the continuous arrangement increases the quantity of material for weaving, and also fails to performance of lightweight. Furthermore, the protrusions are formed by the core knotting directly, so material is consumed more.

The present invention is, therefore, arisen to obviate or at least mitigate the above mentioned disadvantages.

SUMMARY OF THE INVENTION

The main object of the present invention is to provide a slip-resistant shoelace to improve the problem of knot slipping. Also, the slip-resistant shoelace has a finer appearance.

To achieve the above and other objects, a slip-resistant shoelace of the present invention includes a body. The body includes an external tube which is woven. Each of pluralities of sections of cavity of the external tube is filled with a center core. The center cores are arranged at intervals. Sections without the center cores are hollow, and sections having the center cores are solid. The hollow sections of the body are able to be disposed in a shoelace hole stably and to be tied and knotted tightly. In addition, the external tube has a constant outer diameter.

Thereby, the hollow sections of the body can be compressed flat when being tied to prevent from slipping. Besides, due to the constant diameter of the external tube, the body has no difference from normal shoelaces in appearance and is pleasing to the eye. Moreover, the center cores are arranged at intervals, so material and cost are economized in contrast with shoelaces with continuous center cores.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an illustration showing a slip-resistant shoelace of the present invention;

FIG. 2 is an axial cross-section view showing a slip-resistant shoelace of the present invention;

FIG. 2a is a radial cross-section view of FIG. 2 indicated as a-a;

FIG. 2b is a radial cross-section view of FIG. 2 indicated as b-b;

FIG. 2c is an axial cross-section view showing another embodiment of a slip-resistant shoelace of the present invention;

FIG. 3 is an illustration of using showing a slip-resistant shoelace of the present invention;

FIG. 3a is a partial enlargement of FIG. 3.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIG. 1 and FIG. 2, the slip-resistant shoelace of the present invention includes a body 1. The body 1 includes an external tube 11 which is woven toward a longitudinal direction of the external tube 11. Each of pluralities of sections of the external tube 11 is filled with a center core 12 which is woven toward a longitudinal direction of the center core 12. Sections without the center core 12 are hollow, as shown in FIG. 2b, and sections having center cores 12 are solid, as shown in FIG. 2a. The center cores 12 are arranged at intervals and are discontinuous. The center cores 12 and the external tube 11 are woven respectively, wherein the center cores 12 are filled into a cavity of the external tube 11 simultaneously when the external tube 11 is being woven. The center cores 12 are positioned but not fixed by the external tube 11, so the center cores 12 are able to be separated from the external tube 11. Besides, the external tube 11 has a constant outer diameter, so the body 1 has a smooth appearance, as shown in FIG. 2c. In another embodiment of the present invention, the external tube 11 is slightly elastic because the external tube 11 is woven. Thus, the external tube 11 is expanded by the center cores 12 inside, so solid sections of the body 1 have slightly larger diameters than hollow sections, as shown in FIG. 2. The whole structure of the body 1 is thereby stabler. However, the difference of diameter is neglectable by naked eyes, as shown in FIG. 1.

Please refer to FIG. 2, FIG. 3, and FIG. 3a. In practical use, the slip-resistant shoelace of the present invention can be used on a shoe 2 for knotting. The hollow sections of the body 1 can be arranged in a shoelace hole and the position of knotting. The hollow sections of the body 1 become compressed flat due to pulling by the shoelace hole or the knot. When the body 1 is torn by external force, the solid sections prevent the body 1 from slipping. Furthermore, the body 1 has no difference with a normal shoelace in appearance. Besides, due to the discontinuous arrangement of the center cores, material and cost are economized comparing with continuous center cores of normal shoelaces. Also, the external tube has a uniform thickness and diameter. Comparing to conventional shoelaces in a ragged appearance, the shoelace of the present invention is easier to manufacture and is more economical. In addition, the discontinuous arrangement is lightweighting, and the center cores which are able to be removed are available for free arrangement.

Claims

1. A slip-resistant shoelace, including a body, the body including an external tube which is formed by weaving, a center core being filled in a section of a cavity of the external tube, the section of the body having the center core being solid, a section of the body without the center core being hollow, the hollow section of the body is able to be disposed in a shoelace hole stably and to be tied and knotted tightly.

2. The slip-resistant shoelace of claim 1, wherein the body has a plurality of center core, the center cores are arranged in the cavity of the external tube at intervals.

3. The slip-resistant shoelace of claim 1, wherein the center core and the external tube are manufactured by weaving respectively, the center core is installed into the cavity of the external tube simultaneously when the external tube is being manufactured by weaving.

4. The slip-resistant shoelace of claim 1, wherein the external tube has a constant outer diameter.

5. The slip-resistant shoelace of claim 1, wherein the center core is positioned but not fixed by the external tube, the center core is able to be separated from the external tube.