Training Device for Self-Defense

CROSS-REFERENCE TO RELATED APPLICATION

[0001]The present application claims priority to, and the benefit of, U.S. Provisional Application No. 63/742,276 which was filed on Jan. 6, 2025, and is incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

[0002]The present invention generally relates to training devices for martial arts practice. More specifically, the present invention relates to a flexible training apparatus constructed as a safe alternative to the traditional metal kusari-fundo. The invention comprises an elongated central body formed as a multi-strand braid constructed from at least four strands of paracord or equivalent tensile-strength cord. The central body extends between a first weighted end and an opposite (i.e., opposing) second weighted end, each weighted end including a spherical core enclosed within a ‘monkey fist knot’ formed of braided cord. Locking knots are positioned adjacent to each ‘monkey fist knot’ to prevent loosening and secure the ends of the braid. The flexible rope construction is designed to improve the movement and effectiveness of a kusari-fundo while absorbing impact and reducing the risk of injury. Accordingly, the present disclosure makes specific reference thereto. Nonetheless, it is to be appreciated that aspects of the present invention are also equally applicable to other like applications, devices, and methods of manufacture.

BACKGROUND

[0003]By way of background, kusari-fundo is a traditional martial arts weapon comprising a short length of metal chain with weighted ends. The handheld chain has historically been used in certain martial arts disciplines for striking, entangling, and restraining techniques. kusari-fundo is effective as a combat tool, however, presents challenges when used in a training environment.

[0004]Because the kusari-fundo is constructed from metal chain links and heavy metal weights, martial arts practitioners face a high risk of injury during practice. Impacts from the weapon can result in bruising, cuts, or even bone injuries, making routine training hazardous. Consequently, the potential for injury often limits the extent to which practitioners can realistically train with the kusari-fundo in martial arts classes or self-defense exercises. Accordingly, individuals desire a safer and more effective training solution that improves the structure and functionality of a kusari-fundo while significantly reducing the likelihood of injury during practice.

[0005]Therefore, there exists a long-felt need in the art for a safe self-defense training apparatus that eliminates the shortcomings of conventional metal kusari-fundo weapons. There is a need for a device that enables martial arts practitioners to safely practice swinging, striking, entangling, and restraining techniques without the high risk of bruising, cuts, or bone injuries associated with metal chains and weights. Further, there is a need for a kusari-fundo training tool that improves the dynamics and balance of the traditional weapon while using lightweight, durable, and cushioned components. Additionally, there is a need in the art for a practice weapon that can be customized in length and weight to accommodate different training applications and user preferences. Finally, there exists a need for a self-defense training apparatus that improves safety, usability, and accessibility in martial arts practice, while preserving the authenticity of technique execution.

[0006]The subject matter disclosed and claimed herein, in one embodiment, comprises a flexible training apparatus featuring a braided paracord central body with weighted ‘monkey fist knot’ ends. The apparatus includes an elongated central body formed of at least four strands of 450-650 paracord or equivalent tensile-strength cord, interwoven into a multi-strand braid. Opposite ends of the elongated body have weighted ends, each weighted end comprises a spherical core enclosed within a ‘monkey fist knot’ formed of braided cord. A practitioner grips the apparatus by one end or by the braided body and employs the device to practice martial arts or self-defense techniques, including striking, blocking, entangling, trapping, or restraining, in a safe and controlled manner.

[0007]In one embodiment, the spherical cores enclosed within the ‘monkey fist knots’ may be made from wood, plastic, rubber, or composite resins, depending on the desired weight and balance of the apparatus. In another embodiment, the braided central body may be formed in lengths ranging from about 20 centimeters to about 60 centimeters to suit different training applications, skill levels, or martial arts disciplines.

[0008]In this manner, the flexible training apparatus of the present invention addresses longstanding shortcomings in conventional kusari-fundo training by enabling a safe and effective alternative to the traditional metal weapon. The invention enables practitioners to engage in realistic martial arts training, including solo drills, paired practice, and flow training, without getting injured. The apparatus improves the mechanics of the kusari-fundo while integrating safety, portability, and customizability into a streamlined solution.

SUMMARY OF THE INVENTION

[0009]The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed innovation. This summary is not an extensive overview, and it is not intended to identify key/critical elements or to delineate the scope thereof. Its sole purpose is to present some general concepts in a simplified form as a prelude to the more detailed description that is presented later.

[0010]The subject matter disclosed and claimed herein, in one embodiment thereof, comprises a flexible training apparatus. The apparatus comprises an elongated central body that extends between a first weighted end and a second weighted end. The elongated central body is formed from a multi-strand braid, which is constructed of at least four strands of 450-650 paracord or an equivalent tensile-strength cord. The braided structure of the elongated central body is constructed to mimic the chain movement of a traditional metal kusari-fundo while maintaining safety for the user. The first weighted end includes a spherical core that is enclosed within a ‘monkey fist knot’. The second weighted end includes a spherical core that is enclosed within a corresponding ‘monkey fist knot’. Each spherical core provides weight distribution, and each ‘monkey fist knot’ provides cushioning and secure retention of the corresponding core. A first locking knot is disposed adjacent to the first ‘monkey fist knot’, and a second locking knot is disposed adjacent to the second ‘monkey fist knot’, wherein the locking knots are integrated with the elongated central body and prevent loosening of the ‘monkey fist knots’.

[0011]The flexible training apparatus is designed to improve the structure and function of a traditional kusari-fundo while reducing the risk of injury. The apparatus enables a practitioner to perform swinging, striking, entangling, and trapping techniques in a realistic manner. The elongated central body, formed of braided paracord, replaces the metal chain of a traditional kusari-fundo. The weighted ends, which are enclosed by ‘monkey fist knots’, replace the rigid metal weights. The apparatus uses rope and cushioned weighted ends instead of metal and therefore absorbs impact during training.

[0012]In one embodiment, the braided elongated member is specifically designed for use in the flexible training apparatus. The braided elongated member includes a plurality of strands, which are interwoven in a four-strand braided configuration. Each strand alternates between an over-crossing and under-crossing position relative to adjacent strands along a longitudinal axis. The braided elongated member produces a symmetrical and continuous interlaced structure. The braided elongated member provides longitudinal flexibility that permits swinging and wrapping motions similar to a chain.

[0013]In yet another embodiment, each ‘monkey fist knot’ is formed from a plurality of sets of turns of the cord. A first set of turns comprises horizontal wraps. A second set of turns comprises vertical wraps that are orthogonal to the horizontal wraps. A third set of turns comprises diagonal or transverse wraps.

[0014]In still another embodiment, a method of practicing martial arts with the flexible training apparatus is described. Firstly, the practitioner provides the apparatus, which includes an elongated central body formed of a multi-strand braid constructed from at least four strands of paracord. The elongated central body extends between a first weighted end and a second weighted end. Each weighted end includes a spherical core that is enclosed within a ‘monkey fist knot’. The practitioner grips the apparatus by at least one of the weighted ends or by the elongated central body. The practitioner then swings the apparatus to simulate the striking and chain movement of a traditional kusari-fundo. The practitioner applies the apparatus in at least one martial arts technique, which may include striking, entangling, trapping, restraining, blocking, controlling distance, or immobilizing an opponent. During training, the paracord and cushioned ‘monkey fist knots’ absorb impact forces.

[0015]Numerous benefits and advantages of this invention will become apparent to those skilled in the art to which it pertains upon reading and understanding of the following detailed specification.

[0016]To the accomplishment of the foregoing and related ends, certain illustrative aspects of the disclosed innovation are described herein in connection with the following description and the annexed drawings. These aspects are indicative, however, of but a few of the various ways in which the principles disclosed herein can be employed and are intended to include all such aspects and their equivalents. Other advantages and novel features will become apparent from the following detailed description when considered in conjunction with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0017]The description refers to provided drawings in which similar reference characters refer to similar parts throughout the different views, and in which:

[0018]FIG. 1 illustrates a perspective view of flexible training apparatus of the present invention in accordance with the disclosed structure;

[0019]FIG. 2 illustrates an isolated view of the elongated central body of the flexible training apparatus of the present invention in accordance with the disclosed structure;

[0020]FIG. 3 illustrates a perspective view of weighted end used in the flexible training apparatus of the present invention in accordance with the disclosed structure;

[0021]FIG. 4 illustrates an exemplary application of the flexible rope training apparatus of the present invention during a martial arts or self-defense technique in accordance with the disclosed structure;

[0022]FIG. 5 illustrates another exemplary application of the flexible rope training apparatus during martial arts practice in accordance with the disclosed structure; and

[0023]FIG. 6 illustrates a perspective view of the flexible rope training apparatus in a stowed or suspended configuration, being wrapped around a support structure for convenient storage or transport in accordance with the disclosed structure.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

[0024]The innovation is now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding thereof. It may be evident, however, that the innovation can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate a description thereof. Various embodiments are discussed hereinafter. It should be noted that the figures are described only to facilitate the description of the embodiments. They are not intended as an exhaustive description of the invention and do not limit the scope of the invention. Additionally, an illustrated embodiment need not have all the aspects or advantages shown. Thus, in other embodiments, any of the features described herein from different embodiments may be combined.

[0025]As noted above, there exists a long-felt need in the art for a safe self-defense training apparatus that eliminates the shortcomings of conventional metal kusari-fundo weapons. There is a need for a device that enables martial arts practitioners to safely practice swinging, striking, entangling, and restraining techniques without the high risk of bruising, cuts, or bone injuries associated with metal chains and weights. Further, there is a need for a kusari-fundo training tool that improves the dynamics and balance of the traditional weapon while using lightweight, durable, and cushioned components. Additionally, there is a need in the art for a practice weapon that can be customized in length and weight to accommodate different training applications and user preferences. Finally, there exists a need for a self-defense training apparatus that improves safety, usability, and accessibility in martial arts practice, while preserving the authenticity of technique execution.

[0026]The present invention, in one exemplary embodiment, is a method of practicing martial arts with the flexible training apparatus. Firstly, the practitioner provides the apparatus, which includes an elongated central body formed of a multi-strand braid constructed from at least four strands of paracord. The elongated central body extends between a first weighted end and a second weighted end. Each weighted end includes a spherical core that is enclosed within a ‘monkey fist knot’. The practitioner grips the apparatus by at least one of the weighted ends or by the elongated central body. The practitioner then swings the apparatus to simulate the striking and chain movement of a traditional kusari-fundo. The practitioner applies the apparatus in at least one martial arts technique, which may include striking, entangling, trapping, restraining, blocking, controlling distance, or immobilizing an opponent. During training, the paracord and cushioned ‘monkey fist knots’ absorb impact forces.

[0027]Reference will now be made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0028]Referring initially to the drawings, FIG. 1 illustrates a perspective view of flexible training apparatus of the present invention in accordance with the disclosed structure. The flexible training apparatus 100 of the present invention is designed as a safer alternative to the traditional metal kusari-fundo and is constructed to improve the structure and function of the metal kusari-fundo weapon but replaces the rigid and dangerous metal with durable paracord and weighted ends as described later in the disclosure. The flexible training apparatus 100 can be used in martial arts practice, drills, and self-defense training for reducing the risk of injury. More specifically, the flexible training apparatus 100 includes an elongated central body 102 extending between a first weighted end 104 and an opposite (i.e., opposing) second weighted end 106. The elongated central body 102 includes a multi-strand braid 108 which is constructed from at least four strands of 450-650 paracord or equivalent tensile-strength cord. The elongated central body 102 models chain movement of the traditional metal kusari-fundo while maintaining safety for the user.

[0029]The first weighted end 104 includes a first spherical core 110 enclosed within a first ‘monkey fist knot’ 112. The first ‘monkey fist knot’ 112 is formed from a braided cord. Similarly, the second weighted end 106 includes a corresponding second spherical core 114 enclosed within a second ‘monkey fist knot’ 116. The cores 110, 114 can be made from a durable material such as wood, plastic, rubber, or composite resins. The ‘monkey fist knots’ 112, 116 provide both protective cushioning and secure retention of the central body 102 to the corresponding cores 110, 114. The ‘monkey fist knots’ 112, 116 provide weight distribution and improve the striking ends of a traditional kusari-fundo while being softer and safer than metal weights.

[0030]A first locking knot 118 is disposed adjacent to the first ‘monkey fist knot’ 112 and an opposite (i.e., opposing) second locking knot 120 is disposed adjacent to the second ‘monkey fist knot’ 116. The locking knots 118, 120 are integrated into the elongated central body 102 and prevent loosening of the ‘monkey fist knots’ 112, 116 respectively.

[0031]The flexible training apparatus 100 functions as a safe practice version of the kusari-fundo, enabling martial artists to train realistic swinging, striking, entangling, and trapping techniques. Further, the flexible training apparatus 100 can be used for solo drills, paired practice, or flow training and is effective for simulating a plurality of scenarios such as striking, blocking, controlling distance, and binding an opponent. It should be noted that the flexible training apparatus 100 does not use the metal chain and weights and therefore absorbs impact and significantly reduces the likelihood of bruising, cuts, or bone injuries during training.

[0032]FIG. 2 illustrates an isolated view of the elongated central body of the flexible training apparatus of the present invention in accordance with the disclosed structure. The braided elongated member 102 includes a plurality (preferably four) of strands 202, 204, 206, 208, each strand can be of same or different tensile strength and shown as partially unbraided in the present embodiment. The plurality of strands 202, 204, 206, 208 are arranged and interwoven in a four-strand braided configuration. Each strand of the plurality of strands 202, 204, 206, 208 alternates between an over-crossing and under-crossing position relative to adjacent strands along the longitudinal axis 210 of the braided elongated member 102, thereby producing a symmetrical and continuous interlaced structure.

[0033]The braided elongated member 102 provides longitudinal flexibility for enabling swinging and wrapping motions similar to a chain and has tensile strength for distributing stress evenly across all the strands 202, 204, 206, 208 to resist breakage during impact or pulling forces. The length of the elongated braided body 102 between the opposite ends 212, 214 is configurable within a range of about 20 centimeters to about 60 centimeters to accommodate various training applications of the training device 100.

[0034]FIG. 3 illustrates a perspective view of weighted end used in the flexible training apparatus of the present invention in accordance with the disclosed structure. The weighted end 104 includes a cord 302 which is disposed over a spherical core 304 (same as 110 of FIG. 1) made from wood, plastic, rubber, or composite material. The core 304 provides weight distribution for striking and balance during training use and is retained within the braided closure of the cord 302.

[0035]The weighted end 104 includes a first set of turns 306 which can be horizontal wraps of the cord 302, a second set of turns 308 which are vertical wraps orthogonal to the first set of turns 306 and a third set of turns 310 which are diagonal or transverse wraps. The set of turns 306, 308, 310 form the interwoven spherical enclosure to enclose the core 304.

[0036]FIG. 4 illustrates an exemplary application of the flexible rope training apparatus of the present invention during a martial arts or self-defense technique in accordance with the disclosed structure. In this embodiment, the apparatus 100 is shown being manipulated by a practitioner 402 to demonstrate the utility of the apparatus 100. The elongated braided body 102 extending between the first weighted end 104 and the second weighted end 106 (held by the practitioner 402), each formed of the monkey fist knots is used in a restraining maneuver whereby the apparatus 100 is looped around a weapon 404 of an opponent 406, thereby simulating a control or immobilization technique.

[0037]FIG. 5 illustrates another exemplary application of the flexible rope training apparatus during martial arts practice in accordance with the disclosed structure. In this embodiment, the flexible rope training apparatus 100 is shown being applied by a practitioner 502 against an opponent 504 in a body-lock restraining maneuver. As illustrated, the practitioner 502 positions the rope device 100 around the hand 506 and neck 508 of the opponent 504, utilizing leverage and body positioning to achieve control and immobilization. Accordingly, the apparatus 100 can be used for striking or entanglement and for non-lethal grappling techniques, including securing, restraining, or redirecting an opponent's movement.

[0038]FIG. 6 illustrates a perspective view of the flexible rope training apparatus in a stowed or suspended configuration, being wrapped around a support structure for convenient storage or transport in accordance with the disclosed structure. In this embodiment, the flexible rope training apparatus 100 is tied around a vertical support 602 with the braided body 102 is coiled around the vertical support 602 and the weighted ends 104, 106 hang freely. The apparatus 100 can be easily carried, stored, or displayed without compromising the functionality thereof.

[0039]Certain terms are used throughout the following description and claims to refer to particular features or components. As one skilled in the art will appreciate, different persons may refer to the same feature or component by different names. This document does not intend to distinguish between components or features that differ in name but not structure or function. As used herein “non-metallic Kusari-Fundo training device”, “flexible training apparatus”, “flexible rope training apparatus”, and “apparatus” are interchangeable and refer to the non-metallic Kusari-Fundo training device 100 of the present invention.

[0040]Notwithstanding the forgoing, the non-metallic Kusari-Fundo training device 100 of the present invention can be of any suitable configuration as is known in the art without affecting the overall concept of the invention, provided that it accomplishes the above stated objectives. One of ordinary skill in the art will appreciate that the non-metallic Kusari-Fundo training device 100 shown in the FIGS. are for illustrative purposes only, and that many other configurations of the non-metallic Kusari-Fundo training device 100 are well within the scope of the present disclosure. Although the dimensions of the non-metallic Kusari-Fundo training device 100 are important design parameters for user convenience, the non-metallic Kusari-Fundo training device 100 may be of any size that ensures optimal performance during use and/or that suits the user's needs and/or preferences.

[0041]Various modifications and additions can be made to the exemplary embodiments discussed without departing from the scope of the present invention. While the embodiments described above refer to particular features, the scope of this invention also includes embodiments having different combinations of features and embodiments that do not include all of the described features. Accordingly, the scope of the present invention is intended to embrace all such alternatives, modifications, and variations as fall within the scope of the claims, together with all equivalents thereof.

[0042]What has been described above includes examples of the claimed subject matter. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the claimed subject matter, but one of ordinary skill in the art may recognize that many further combinations and permutations of the claimed subject matter are possible. Accordingly, the claimed subject matter is intended to embrace all such alterations, modifications and variations that fall within the spirit and scope of the appended claims. Furthermore, to the extent that the term “includes” is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term “comprising” as “comprising” is interpreted when employed as a transitional word in a claim.