WO2013162186A1

WO2013162186A1 - Jump rope device including optical fiber

Info

Publication number: WO2013162186A1
Application number: PCT/KR2013/002801
Authority: WO
Inventors: 배병영
Original assignee: Bae Byoung-Young
Priority date: 2012-04-23
Filing date: 2013-04-04
Publication date: 2013-10-31

Abstract

Disclosed is a jump rope device that includes an optical fiber. The jump rope device according to the present disclosure includes a rope in which the optical fiber is integrated in a transparent tube, and light emitted from a light source built into the handle is transmitted to the optical fiber in order to emit light from the optical fiber. At least one light-emitting area is formed in the optical fiber, and the light-emitting area has multiple micro grooves formed in a cladding that surrounds the core of the optical fiber so that light progressing along the core can be emitted to the outside of the optical fiber.

Description

Rope skipping mechanism with optical fiber

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope skipping mechanism having an optical fiber, and more particularly, to a rope skipping mechanism which receives and emits light from a light source embedded in a handle through a string consisting of an optical fiber and a transparent soft tube having the optical fiber embedded therein.

Conventional rope skipping mechanisms include a pair of handles and a string of predetermined length connected between the pair of handles. Nowadays, a rope skipping mechanism having various light emitters installed inside the rope of the rope skipping mechanism so that various effects, for example, can be enjoyed even in a place where lighting is dark, has been disclosed. That is, a variety of rope skipping mechanisms using conventional light emitters are disclosed in Korean Patent Publication No. 2001-0007781, Domestic Utility Model Publication No. 2001-0007754, Domestic Utility Model Publication No. 2001-0035400 and Domestic Utility Model Publication No. 2001-0025909, respectively. Is disclosed.

Such a conventional rope skipping structure uses an optical fiber or LED in which a light emitter is inserted into a string. The optical fiber applied to the optical fiber is processed to remove a portion of the cladding surrounding the core for this purpose, because light traveling along the core must be emitted to the outside of the optical fiber. In this case, the cladding of the optical fiber is removed by spraying sand on the optical fiber through sandblasting, or by thermal or chemical change.

However, in the case of using a sanding spray, it is difficult to narrow the removal of the cladding, and the sand sprayed with high pressure removes not only the cladding but also a large part of the core more than necessary (processed to be larger than a predetermined area and depth). Losses occur and only the machining area is brightened and the tensile strength is weakened after machining. Further processing to evenly circumferentially brighten the tensile strength is drastically weakened and the loss of light is even greater. This is also the case when the cladding is removed through thermal or chemical change, which is a problem that the tension strength is maintained and evenly circumferentially brightened to the desired length, and the user pulls a little while jumping rope. It became weaker than the required tensile strength, making it difficult or commercialized, and has died.

In addition, when the LED is inserted into the transparent tube, the user is broken and cannot use because of the impact that occurs when the rope repeatedly collides with the ground while jumping.

In order to solve the above problems, the present invention is to provide a rope skipping mechanism that can maintain the tensile strength of the optical fiber, and can emit light with a suitable brightness at a desired position by using a transparent tube surrounding the optical fiber as a light emitting body along with the optical fiber The purpose is.

In order to achieve the above object, the present invention is provided with a string in which the optical fiber is embedded in a transparent tube, and a rope skipping mechanism for transmitting light emitted from the light source embedded in the handle to the optical fiber, wherein the optical fiber is at least One light emitting area is formed, and the light emitting area includes a plurality of fine grooves formed in a cladding surrounding a core of the optical fiber so that light traveling along the core can be emitted to the outside of the optical fiber. A rope skipping mechanism is provided.

The light emitting area is preferably formed along the circumferential direction of the optical fiber.

A plurality of light emitting regions may be formed at intervals along the longitudinal direction of the optical fiber.

The light emitting regions may be formed at intervals along the circumferential direction.

The light emitting region may have a band shape along a length direction of the optical fiber.

The optical fiber may include at least first to third optical fibers that are continuously connected by a connector, and the light emitting region may be limited to only the second optical fiber disposed between the first and third optical fibers.

The tube is made of soft and can be used as a light emitter by the light emitted from the light source, polymethyl methacrylate (polymethyl methacrylate), polystyrene (polystyrene), acrylonitrile styrene (polyrylyl), polyvinyl chloride It is preferably made of a synthetic resin containing any one of chloride), polycarbonate, polyurethane (polyurethane) and fluorine resin.

The handle includes first to third holders rotatably mounted at both ends of the string to the pair of handles, wherein the first holder is configured to fix both ends of the optical fiber to both ends of the tube. It is inserted between and the tube, the second holder is fixed to the tube to the third holder, the third holder may be rotatably connected inside the handle.

The first holder may have an insertion hole into which the optical fiber is inserted, and a tapered surface may be formed at the tip of the insertion hole.

Preferably, the first holder has a cutout portion formed along a longitudinal direction.

The first holder may have at least three contact protrusions formed on an outer circumferential surface of the first holder along a length direction of the first holder, and the at least three contact protrusions may be formed at equal intervals from each other.

The second holder may form a plurality of cutouts at the distal ends.

Preferably, the second holder is formed with a cutout in the longitudinal direction.

The second holder may have at least three contact protrusions formed on an outer circumferential surface of the second holder along a length direction of the second holder, and the at least three contact protrusions may be formed at equal intervals from each other.

The second holder may form a tapered surface on the outer circumference of the second holder such that the diameter gradually increases from the front end to the rear end.

Preferably, the third holder has a coupling hole into which the second holder is inserted, and the coupling hole has a tapered surface.

The third holder may be rotatably supported at the rear end of the rope skipping mechanism so that the optical fiber and the light source are coaxially disposed.

The light source is made of an LED, and the optical fiber and the LED are preferably coaxially disposed with each other.

The light source may further include a light source protection cover detachably coupled to the PCB on which the light source is mounted to surround the light source.

The light source protective cover forms a light passage and a hole through which light emitted from the light source can pass, and the light passage and the hole are disposed concentrically with the light source and a reflective film is formed on an inner circumferential surface thereof.

The light source protective cover may include a plurality of spacer protrusions formed on one surface of the light source protective cover to space the outer surface of the light source and the inner surface of the light source protective cover.

Furthermore, it is of course possible to integrally form the tube and the optical fiber by extruding the tube with the optical fiber embedded so that the optical fiber is located inside the tube.

In this case, the handle may include an inner holder and an outer holder for rotatably installing both ends of the string to the pair of handles, wherein the inner holder has one end of the tube inserted therein and the outer side The holder is preferably inserted into the inner holder and is rotatably disposed inside the handle.

As described above, in the present invention, since the light emitting region formed in the cladding is formed of a plurality of fine grooves to minimize the damage of the core of the optical fiber, there is an advantage of minimizing the decrease in the overall tensile strength of the optical fiber and the light circumferentially It can evenly transmit light while brightening evenly.

In addition, the present invention is capable of fully exhibiting the function of the rope skipping mechanism by providing a transparent tube having a flexible thickness formed in a thin thickness, and furthermore, the tube is made of a synthetic resin containing a good component of light transmission together with the optical fiber Because it can be used as a light emitting body, it is possible to produce various light emission without deteriorating the brightness of light.

1 is a perspective view showing a rope skipping mechanism having an optical fiber according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view showing part II shown in FIG. 1,

3 is a cross-sectional view showing a part III shown in FIG.

4 is a schematic perspective view showing an example in which light emitting regions formed in an optical fiber are formed at predetermined intervals in the circumferential direction of the optical fiber,

5 is a schematic perspective view showing another example of a light emitting region formed in an optical fiber,

6 is a cross-sectional view showing an example of inserting a plurality of optical fibers in the tube,

7 is a cross-sectional view showing an example in which a tube is used as a light emitter together with an optical fiber while limiting a light emitting area to a central section of a string;

8 is a cross-sectional view illustrating an example in which an optical fiber having a light emitting area and an optical fiber without a light emitting area are connected by a connector;

9 is a cross-sectional view showing a VIII portion shown in FIG.

10 is an enlarged perspective view illustrating the first holder illustrated in FIG. 9;

11 to 13 are enlarged perspective views respectively illustrating various embodiments of the first holder,

14 is a view sequentially illustrating a process of inserting the second holder shown in FIG. 9 into the third holder;

15 to 19 are perspective views illustrating various embodiments of the second holder,

20 is a perspective view illustrating the light source protection cover illustrated in FIG. 9.

Hereinafter, with reference to the accompanying drawings will be described a rope skipping mechanism having an optical fiber according to an embodiment of the present invention. Meanwhile, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Referring to FIG. 1, a rope skipping mechanism having an optical fiber according to an embodiment of the present invention includes a rope 10 having a predetermined length and a pair of handles 30 rotatably installed at both ends of the rope 10. , 50).

The string 10 includes a transparent soft tube 11 and an optical fiber 20 inserted along the inner passage 10a of the tube 11.

The optical fiber 20 serves as a light emitter and receives light from a light source (for example, LED) embedded in at least one of the pair of

handles

30 and 50.

2 and 3, the optical fiber 20 includes a core 21 serving as a light propagation in the center, a cladding 23 surrounding the core 21, and a plurality of light emitting regions 25. Include.

In the plurality of light emitting regions 25, a plurality of fine grooves (not shown) are formed so that light traveling along the core 21 may diverge to the outside of the optical fiber 20. In this case, the plurality of fine grooves are formed by removing a very small amount of the cladding 23 so that a part of the core 21 may be exposed to the outside of the cladding 23.

Such a fine groove is formed by wearing a portion of the cladding 23 and can emit light of a predetermined brightness without removing a large portion of the cladding 23 to emit light as in the related art. Accordingly, the optical fiber 20 has an effective structure that can maintain a good tensile strength as a whole and efficiently transmit light evenly radiating light in the circumferential direction.

The plurality of light emitting regions 25 may be formed on the outer circumferential surface of the optical fiber 20 at predetermined intervals as shown in FIG. 2, wherein each light emitting region 25 is continuously formed along the circumferential direction. Can be. In this case, as shown in FIG. 4, the light emitting regions 25a may be formed at predetermined intervals along the circumferential direction.

Referring to FIG. 5, the plurality of light emitting regions 27 may be continuously formed along the optical fiber 20 to have a predetermined length to effectively realize side light emission. In this case, the plurality of light emitting regions 27 may be set at the same angle to each other. In addition, when the light emitting regions 27 are continuously formed in a band shape as described above, only one light emitting region 27 may be formed in consideration of the brightness of light emitted through the light emitting regions 27.

Referring to FIG. 6, it is also possible to use the

optical fibers

20a, 20b, and 20c as a bundle. In this case, the plurality of light emitting regions 25 formed in each of the

optical fibers

20a, 20b, and 20c do not overlap each other. It may be formed in the sections D1, D2, and D3. This is an arrangement in consideration of the brightness of the light emitted from each light emitting region (25).

Referring to FIG. 7, the light emitting region 25 formed in the optical fiber corresponds to approximately 1/3 to 1/2 of the central section L2 of the entire string 10 (the entire section L of the string 10). It is preferable to form only the part corresponding to the section). Thus, limiting the formation position of the light emitting region 25 to the center section L2 takes into account the intensity of light emitted from the light sources built in the

handles

30 and 50, respectively. In other words. When a plurality of light emitting regions 25 are formed in the entirety of the optical fiber 20 to correspond to the entire section L of the string 10, the light emitting regions 25 are located far from the light sources disposed at both ends of the optical fiber 20. ), The brightness is gradually lowered. Therefore, as shown in FIG. 6, when a plurality of light emitting regions 25 are formed in the center section L2, light may be emitted through the light emitting regions 25 without deterioration of light intensity.

In this case, in order to emit light even in both side sections (L1, L3) of the string 10, the tube 11 can also be used as a light emitter so that the light proceeds smoothly even through the transparent soft tube (11). . To this end, the tube 11 is transparent, soft and has good light propagation, that is, polymethyl methacrylate, polystyrene, acrylonitrile styrene, and polyvinyl chloride. , Polycarbonate, polyurethane, and a fluororesin (for example, TEFLON) is preferably made of a synthetic resin containing any one of the main components. In addition, in the present embodiment, the tube 11 is made of a transparent soft material as an example, but the present invention is not limited thereto. It is of course possible to use a material made of a semi-transparent soft material having a somewhat low transparency.

Referring to FIG. 8, it is also possible to use an optical fiber 20 in which the light emitting region 25 is formed and an optical fiber 20a in which the light emitting region 25 is not formed. That is, the optical fiber 20 in which the light emitting region 25 is formed is disposed in the center, and the optical fibers 20d in which the light emitting region 25 is not formed are connected to both sides thereof through the connector C. FIG. In this case, one end of each optical fiber 20d is fixed to the tube 11 by the first holder 31, respectively. In addition, instead of the optical fiber 20, it is of course possible to have a wire capable of side-emitting light made of the same material as the tube 11 made of a synthetic resin including a transparent, soft, and good propagation of light.

Since the pair of

handles

30 and 50 have the same internal structure, only the configuration of one handle 30 will be described.

Referring to FIG. 9, the handle 30 includes a first holder 31, a second holder 33, a third holder 35, a light source 37, and a PCB 39.

Referring to drafting 10, one holder 31 has a substantially cylindrical shape, and an insertion hole 31a into which one end of the optical fiber 20 is inserted is formed inside. In this case, the taper surface 31b is formed in the inner peripheral surface of the front end of the insertion hole 31a so that one end of the optical fiber 20 can be easily inserted into the insertion hole 31a.

In addition, the first holder 31 is inserted into the tube 11 together with the optical fiber 20 to fix one end of the optical fiber 20 to the tube 11. In this case, it is preferable that the first holder 31 is made of rubber having elasticity or synthetic resin having elasticity so as to be pressure-coupled between the optical fiber 20 and the tube 11. In addition, the first holder 31 has a tapered surface 31c formed on the outer circumferential surface of the distal end of the insertion hole 31a to facilitate insertion into the tube 11.

In addition, in the structure in which the transparent tube 11 is inserted and assembled, when the distance between the optical fiber 20 and the tube 11 is large, the first holder 31 is necessary and may be omitted when the distance is small. And unlike the structure of the string 10 that is assembled by inserting the optical fiber 20 into the tube 11, the tube 11 and the optical fiber (20) by extrusion molding in a state in which the optical fiber 20 is embedded in the transparent tube 11 In the case of adopting the structure of the string in which) is integrated, the first holder 31 can be omitted.

On the other hand, the first holder 31 can also be made of various modified structures, as shown in Figs.

That is, as shown in FIG. 11, the cutout portion 31d is formed along the longitudinal direction of the first holder 131, so that one end of the optical fiber 20 can be more easily inserted into the insertion hole 31a.

In addition, as shown in FIG. 12, the first holder 231 may form a plurality of contact protrusions 31e along the longitudinal direction of the first holder 231. In this case, the plurality of contact protrusions 31e are spaced apart at approximately the same distance. The plurality of contact protrusions 31e minimize the contact area between the first holder 231 and the inner circumferential surface of the tube 11 when the first holder 231 is inserted into the tube 11. Accordingly, when the first holder 231 is drawn out from the tube 11 for maintenance such as replacing the optical fiber 20, it may be easily performed.

Furthermore, as shown in FIG. 13, the first holder 331 may of course include the cutout 31d and the plurality of contact protrusions 31e together.

Referring to FIG. 14, the second holder 33 has a cylindrical shape in which the outer diameter gradually increases from the front end to the rear end. In this case, the inclination angle α of the tapered surface 33f formed on the outside of the second holder 33 is smaller than the inclination angle β of the tapered surface 35b of the third holder 35 described later. Accordingly, when the second holder 33 is inserted into the coupling hole 35a of the third holder 35, the second holder 33 may be gradually engaged in a pressing state. For this compression coupling, the second holder 33 is preferably made of a material having elasticity.

In addition, the second holder 33 is formed with an insertion hole 33a into which one end of the tube 11 is inserted, and a plurality of cutouts 33b are formed at the front end thereof.

The plurality of cutouts 33b are for allowing the second holder 33 to be easily inserted into the coupling hole 35a having the tapered surface 35b of the third holder 35. That is, when the second holder 33 is inserted into the engaging hole 35a of the third holder 35, the tip of the second holder 33 is formed by the plurality of cutouts 33b. As the opening of the insertion hole (33a) of the squeeze the natural pressure on the tube (11) and the second holder (33) is pressed against the coupling hole (35a) of the third holder (35) to ensure a firm coupling between the coupling configuration Can be achieved.

15 to 17, the second holder 33 may form two or more cutouts 33b formed at the distal end portion, preferably 2-4. The second holder 33 may be further formed to have a notch 33c in one side along the longitudinal direction, so that the cross section of the second holder 33 may have a “C” shape. The tube 11 can be easily inserted into the insertion hole 33a of the second holder 33 through the cutout 33c. In addition, a cutout groove 33d corresponding to the cutout portion 33c may be formed, and the cutout groove 33d (see FIG. 16) may be formed in the longitudinal direction of the second holder 33 on the inner circumference of the second holder 33. It is formed along. Although notch 33d does not appear in the second holder 33 illustrated in FIGS. 15 and 17, respectively, the notched groove 33d is formed inside each second holder 33 similarly to the illustrated second holder 33 of FIG. 16. ) Is formed.

18 and 19, a plurality of contact protrusions 33e may be formed along the longitudinal direction of the second holder 33 on the outer circumference of the second holder 33 having various shapes. In this case, the tip portion of the second holder 33 is formed in a plurality of arc shapes by the plurality of cutouts 33b, but the plurality of contact protrusions 33e are preferably set at positions corresponding to the centers of the arcs. Do.

Again, referring to FIG. 9, the third holder 35 has a substantially cylindrical shape, a coupling hole 35a into which the second holder 33 is inserted, and a through hole through which the tube 11 penetrates. 35c) is formed. In this case, the coupling hole 35a and the through hole 35c of the third holder 35 communicate with each other and are located coaxially.

In addition, the third holder 35 has a neck portion 35d that is rotatably coupled to the through hole 30a of the handle 30 at one side thereof. The third holder 35 is rotatably supported by a support protrusion 30b having an outer circumferential surface formed inside the handle 30. Accordingly, the third holder 35 may be smoothly rotated while being coupled to the tube 11. In this case, the third holder 35 is rotatably inserted outside the through hole 30c of the support rib 30b having the rear end 35e formed inside the handle 30. Therefore, since the third holder 35 is supported by the support ribs 30b, the optical fiber 20 is coaxial with the light source 37 even while the third holder 35 is rotated.

The light source 37 may be applied to, for example, an LED, and is mounted on the PCB 39. The PCB 39 is mounted on the fixed slot 30d formed inside the handle 30.

In this case, the light source 37 preferably has a center thereof coaxially with the center of the optical fiber 20, which means that when the centers of the light source 37 and the optical fiber 20 are eccentric with each other, This is to prevent the amount of light transmitted to the target 20) from being reduced.

In this embodiment, the light source 37 and the PCB 39 are described as being installed on both of the pair of

handles

30 and 50, but the present invention is not limited thereto and is installed only on one of the pair of

handles

30 and 50. It is also possible.

The PCB 39 is formed with

snap coupling holes

39a and 39b to which the light source protective cover 40 is detachably coupled.

The light source protection cover 40 is to protect the light source 37 and is installed on the PCB 39 to surround the light source 37. The light source protection cover 40 has a pair of

coupling legs

41a and 41b snapped to the

snap coupling holes

39a and 39b at both sides, and light passing through the light emitted from the light source 37 at the center thereof. The through hole 43 is formed.

The light passage hole 43 is disposed coaxially with the light source and may be formed with a diameter corresponding to the diameter of the light source 37. In addition, the light passage hole 43 is formed with a reflective film for reflecting light on the inner peripheral surface. The reflective film can be formed by a method such as chromium plating.

Referring to FIG. 20, the light source protection cover 40 forms a plurality of spacer protrusions 45 on one surface thereof. In the plurality of spacer protrusions 45, the front and side surfaces of the light source 40 are spaced apart from the inner surface of the light source protective cover 40 by a predetermined distance (for example, 0.1 to 0.3 mm) (see FIG. 9). Accordingly, even when an impact is applied to the light source protection cover 40, the impact energy may be prevented from being directly transmitted to the light source 37, thereby preventing damage to the light source 37.

On the other hand, the

handles

30 and 50 preferably include a battery (not shown) for supplying power to the light source 37.

In the present invention configured as described above, as the light emitting region 25 formed in the cladding 23 is formed of a plurality of fine grooves so as to minimize the damage of the optical fiber core 21, the decrease in the overall tensile strength of the optical fiber is reduced. It can be minimized.

In addition, the present invention can fully exhibit the function of the rope for rope skipping mechanism by providing a transparent tube 11 having a thin thickness and having flexibility.

In addition, since the transparent tube 11 is made of a synthetic resin containing a component having good light transmission, the transparent tube can be used as a light emitting body together with the optical fiber, so that various light emission can be produced without deteriorating the brightness of the light.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

Claims

A translucent or transparent tube having a string with an optical fiber embedded therein, and a rope skipping mechanism for transmitting light emitted from a light source embedded in a handle to an optical fiber to emit light from the optical fiber,

At least one light emitting region is formed in the optical fiber, and the light emitting region includes a plurality of fine formed in a cladding surrounding a core of the optical fiber so that light traveling along the core can be emitted to the outside of the optical fiber. A rope skipping device comprising a groove.
The method of claim 1,

And the light emitting area is formed along the circumferential direction of the optical fiber.
The method according to claim 1 or 2,

And a plurality of light emitting regions are formed at intervals along the longitudinal direction of the optical fiber.
The method of claim 3,

The light emitting region is a rope skipping mechanism, characterized in that formed at intervals along the circumferential direction.
The method of claim 1,

The light emitting region is a rope skipping mechanism, characterized in that formed in a band shape along the longitudinal direction of the optical fiber.
The method of claim 1,

The optical fiber consists of at least first to third optical fibers that are continuously connected by a connector,

The rope skipping mechanism, characterized in that the light emitting region is formed only limited to the second optical fiber disposed between the first and third optical fibers.
The method of claim 1,

The tube is made of soft and can be used as a light emitter by the light emitted from the light source, polymethyl methacrylate, polystyrene, acrylonitrile styrene, polyvinyl chloride Jump rope mechanism, characterized in that made of a synthetic resin containing any one of chloride, polycarbonate, polyurethane (polyurethane) and fluorine resin.
The method of claim 1,

The handle includes first to third holders for rotatably installing both ends of the string to the pair of handles,

The first holder is inserted between the optical fiber and the tube to fix both ends of the optical fiber to both ends of the tube,

The second holder fixes the tube to the third holder,

The third holder is a rope skipping mechanism, characterized in that rotatably connected inside the handle.
The method of claim 8,

The first holder has an insertion hole into which the optical fiber is inserted, and a tipping portion of the insertion hole has a tapered surface.
The method of claim 9,

The first holder is a rope skipping mechanism, characterized in that the cutout is formed along the longitudinal direction.
The method of claim 9 or 10,

The first holder has at least three contact protrusions formed on an outer circumferential surface of the first holder along a length direction of the first holder.

The at least three contact protrusions may be formed at equal intervals from each other.
The method of claim 8,

The second holder is a rope skipping mechanism, characterized in that the cutout is formed along the longitudinal direction.
The method according to claim 8 or 12, wherein

The second holder is a rope skipping mechanism, characterized in that to form a plurality of cutouts at the distal end.
The method of claim 8,

The second holder is formed with at least three contact protrusions along the longitudinal direction of the second holder on the outer circumferential surface,

The at least three contact protrusions may be formed at equal intervals from each other.
The method of claim 13,

The second holder is formed with at least three contact protrusions along the longitudinal direction of the second holder on the outer circumferential surface,

The at least three contact protrusions may be formed at equal intervals from each other.
The method of claim 8,

The second holder is a rope skipping mechanism, characterized in that to form a tapered surface on the outer periphery of the second holder such that the diameter gradually increases from the front end to the rear end.
The method according to claim 8 or 16,

And the third holder has a coupling hole into which the second holder is inserted, and the coupling hole has a tapered surface.
The method of claim 8,

The third holder is a rope skipping mechanism, characterized in that the rear end is rotatably supported inside the rope skipping mechanism so that the optical fiber and the light source are coaxially disposed.
The method of claim 1,

The light source is made of an LED, the rope skipping mechanism, characterized in that the optical fiber and the LED is disposed coaxially with each other.
The method of claim 19,

The rope skipping mechanism further comprises a light source protection cover detachably coupled to the PCB on which the light source is mounted to surround the light source.
The method of claim 20,

The light source protective cover forms a light passage and a hole through which light emitted from the light source can pass,

The light passage and the hole are arranged concentrically with the light source, characterized in that the rope skipping mechanism is formed on the inner peripheral surface.
The method of claim 20,

The light source protective cover includes a plurality of spacer protrusions formed on one surface of the light source protective cover to separate the outer surface of the light source and the inner surface of the light source protective cover.
The method of claim 1,

The rope is a rope skipping mechanism, characterized in that the tube and the optical fiber are integrally formed by extruding the tube with the optical fiber embedded so that the optical fiber is located inside the tube.
The method of claim 23, wherein

The handle includes an inner holder and an outer holder for rotatably installing both ends of the string to the pair of handles,

One end of the tube is inserted into the inner holder,

The outer holder is a rope skipping mechanism, characterized in that the inner holder is inserted in the inside, rotatably disposed inside the handle.