WO2006135196A1

WO2006135196A1 - Tricycle kick board

Info

Publication number: WO2006135196A1
Application number: PCT/KR2006/002280
Authority: WO
Inventors: Byeong Su Park
Original assignee: Mski Corporation
Priority date: 2005-06-14
Filing date: 2006-06-14
Publication date: 2006-12-21
Also published as: WO2006135196B1

Abstract

There is provided a tricycle kick board used as play equipment or sports equipment. The tricycle kick board comprises a front wheel, a pair of decks connected to one side of the front wheel to be opened and shut and integrated with foot boards on which the feet of a rider are put and with braking devices for braking wheels, a pair of link frames in one of which a shaft is mounted to rotate at a uniform angle, and a joint device in which the other ends of the pair of link frames are mounted together with shafts so that shock is absorbed by a buffering device such as a spring and under which the front wheel is mounted together with a shaft. Therefore, the rider can generate a driving force without stamping his or her foot on the earth to run forward and backward, can brake one of the right and left braking devices to easily change the direction, and can freely use his or her hands to safely enjoy riding.

Description

TRICYCLE KICK BOARD

Technical Field

[1] The present invention relates to a tricycle kick board used as play equipment or sports equipment.

Background Art

[2] A kick board is new sports equipment provided with a foot board of 50cm with two wheels on which a rider puts his or her one foot to stamp his or her the other foot on the earth and provided with a handle having a height of about Im by which the rider changes the direction. The kick board is also referred to as a stick board, a push scooter, a roller board, a roller scooter, and a kick scooter board. At home, the kick board that is the model name of K2 that developed the equipment first is used as a proper noun.

[3] The kick board is used as a traffic means when a rider moves in a short distance, for example, from one lecture room to another lecture room or from an office to a subway station or is used as sports equipment of a child.

[4] The body frame of the kick board is made of aluminum that is light and can be unfolded and folded so that the kick board can be easily carried. Also, since the rider can jump when he or she is used to riding on the kick board, the rider can have a fun while taking an exercise.

[5] The rider can learn how to ride on the kick board within about 10 minutes. The rider grasps the handle with his or her hands, puts only half of his or her one foot on the center of the foot board, stamps his or her the other foot on the earth, and puts his or her the other foot on the foot board together with the foot that was previously put on the foot board. At this time, the right and left feet must be uniformly put on the foot board for safety. The rider puts his or her feet on the foot board to enjoy speed in a downhill. The rider steps on the cover of the rear wheel that is referred to as a foot brake to stop the kick board.

[6] According as the number of riders increases, various techniques such as one hand riding, ferryboat riding in which the rider rides on the kick board so that the front and the rear are reversed, turning in the air, spin turning in which the rider lifts the front wheel to change the traveling direction by 180 degrees, stopping by one wheel, stepping down stairs, Handleya of turning the handle by 180 degrees, bunny hop that is a jump technique, and Glove in which the rider grasps the foot board in the air as well as a technique of simply riding on the kick board have been developed.

[7] It is preferable to ride on the kick board on a bright and less crowded paved road. Since the kick board does not have a rear view mirror so that the rider cannot look back, it is dangerous to ride on the kick board on a crowded road.

[8] Also, when water stays on the road, when the road is steep, or when the rider runs at high speed, the brake does not work well. Therefore, the rider is not allowed to run at excessive speed. When the brake does not work well, the rider has no choice but to put his or her one foot on the road or to jump off the kick board so that the rider may be injured. For safety, when a child below the age of 13 rides on the kick board, the child must wear a helmet and a safeguard.

[9] As described above, since a shaft is provided to run parallel with the wheels in order to brake the kick board, the rider must balance him or herself in a state where the feet of the rider are put on the foot board. When the rider runs at high speed, the rider must step the foot brake while balancing himself or herself. Therefore, it can be dangerous to a rider who is slow in his or her movements.

[10] While riding on the conventional kick board, the rider must balance himself or herself on one foot, which requires a lot of practice. Also, since the conventional kick board has no driving force, the rider must repeat the action of stamping his or her foot on the earth to operate the kick board. Therefore, the method of operating the kick board is too simple so that the effect of exercise deteriorates.

[11] In order to solve the problem of the conventional kick board, Korean Utility Model

Registration No. 20-0351826 entitled 'Kick Board' is provided.

[12] In the conventional kick board, a pair of foot board frames are provided in a handle in which a steering wheel is provided, wheels are provided on the rear end bottom surface of each foot board frame on which a foot board is provided, and a folding device is provided between the handle and each foot board frame.

[13] The folding device comprises a fixed frame fixed to the handle, a foot board frame provided by coupling a hinge shaft with the fixed frame, a locker provided in the fixed frame to comprise a locking groove, a fixed locker elastically provided in the leading end of the foot board frame, and a foldable cover connected to the fixed locker.

[14] That is, in the conventional kick board, a rider shakes the handle from side to side and applies his or her weight on the right and left foot boards to generate the driving force. When the kick board is kept, the kick board is folded by the folding device to minimize the volume of the kick board.

[15] In the folding device, when the foldable cover is pulled backward, a spring is compressed so that the fixed locker and the locker are separated from each other. In this state, when the kick board is unfolded or folded and then, the force applied to the foldable cover is removed, the spring is recovered so that the fixed locker and the locker are engaged with each other to be fixed.

[16] Meanwhile the conventional kick board has an advantage in that the volume of the kick board is reduced by the folding device, the timing at which the direction of the steering wheel is controlled and the timing at which the weight of the rider is shifted must tally with each other to generate the driving force in the traveling direction, which is difficult. It is difficult to increase speed on a plane road. An additional brake for reducing speed on a downhill road is not provided, which is dangerous.

[17] The kick board can travel only forward and cannot travel backward, which makes the rider bored. The rider must exert more efforts than the distance by which the kick board travels, which makes the rider easily give up running forward.

[18] In order to solve the above-described problem, Korean Utility Model Registration

No. 20-0380850 entitled 'Tricycle' is provided as another example.

[19] The tricycle comprises a fork comprising a front wheel and a handle, right and left foot boards rotatably coupled with the fork, a driving plate formed on the rear end top surface of each foot board to rotate, and rear wheels positioned on the bottom surfaces of the foot boards to be connected to the driving plates.

[20] The foot boards comprise angle controlling devices for controlling the degree to which the right and left foot boards are separated from each other on the front end top or bottom surfaces thereof.

[21] The foot board comprises a front member whose one end is connected to the fork and whose the other end has an opening, a rear member whose one end is inserted into the opening so as to move from front to rear and whose the other end has the driving plate and the rear wheel in the vicinity, and an elastic body disposed in a part where the front member and the rear member are connected to each other.

[22] The foot board is divided into two in a horizontal direction to be connected to each other by a hinge and to be folded. The wheels provided on the bottom surfaces of the foot boards together with shafts are formed to change the direction as the rider wishes. A brake is provided in the handle.

[23] The foot boards are folded to keep or move the tricycle. The rider applies his or her weight on the right and left foot boards and stamps the foot opposite to the foot put on the foot board to which his or her weight is applied on the earth to generate the driving force.

[24] A shock absorber is provided in the tricycle so that the rear wheels can absorb the shock. However, since the wheels are made of an elastic material, it is not necessary to provide the shock absorber that increases the price of the product.

[25] The angle controlling devices control the angle at which the feet are separated from each other to limit the angle at which the left foot is separated from the right foot (or the right foot is separated from the left foot). When the rider is out of balance in a state where the legs of the rider are not separated from each other, it could be more dangerous. When the upper or lower part of the body of the rider leans to one side, the rider must balance himself or herself by the leg opposite to the leg on the side where the upper or lower part of the body of the rider leans. However, since the angle at which one foot board and the other foot board are separated from each other is limited, it is difficult for the rider to balance himself or herself.

[26] Since the hands of the rider grip the handle so that the hands of the rider are not free, it is difficult for the rider to balance himself or herself.

[27] In order to supplement the monotony and the danger of the two wheel kick board, sports equipment in which a front wheel and two decks on which the feet of a rider are put are connected to each other by a link frame, the front wheel comprises a handle member the same as or similar to the handle of a bicycle, each deck comprises at least one wheel together with a shaft, and the grip of the handle member comprises a brake so that the wheels provided in the decks together with the shafts are braked was developed. The sports equipment is referred to as a trikke or a tricycle kick board.

[28] Since the above-described tricycle kick board are supported in three parts (the front wheel and the two decks on which the feet of the rider are put), the rider can stably run compared with the conventional kick board with two wheels and can run at higher speed. However, the rider cannot know how fast he or she is running.

[29] The rider shifts his or her weight from front to rear and from right to left to the rhythm at proper points of time and moves the handle in zigzags at the same time to generate the driving force of the tricycle kick board.

[30] In particular, the rider can run at higher speed by applying his or her weight on the right and left decks to thrust the opposite foot (deck) in the opposite direction.

[31] When the rider shifts his or her weight from right to left at proper points of time, the deck on which the weight of the rider is not applied must be lifted so that it is possible to easily thrust the other deck. In the conventional tricycle kick board, the front wheel and the decks are connected to each other by a link frame and no element for lifting the decks is provided.

[32] Also, in the conventional tricycle kick board, the length of the link frame for connecting the front wheel and the decks to each other is limited so that the rider thrusts the opposite deck in the opposite direction only by a limited length. Disclosure of Invention Technical Problem

[33] In order to solve the above problems, it is an aspect of the present invention to provide a tricycle kick board in which a pair of decks on which the feet of a rider are put to generate a driving force are separated from each other from side to side by mounting a shaft in a joint device so that the limitations on the degree to which the decks are separated from each other are controlled and that it is possible to safely obtain the driving force.

[34] It is another aspect of the present invention to provide a tricycle kick board in which decks can rotate at a uniform angle and the feet of a rider can be opened and shut so that the rider can run forward and backward in accordance with the direction of the feet of the rider and the direction in which a force is applied.

[35] It is still another aspect of the present invention to provide a tricycle kick board in which the height of a handle member and grips can be determined in accordance with the height of the rider without an additional device.

[36] It is still another aspect of the present invention to provide a tricycle kick board in which brake levers are mounted in grips and the grips are not fixed to a specific position so that the rider can freely use his or her hands and that the rider can easily balance himself or herself.

[37] It is still another aspect of the present invention to provide a tricycle kick board in which a detector is mounted on one side of a front wheel and a gauge board is mounted in a handle member so that the rotation of the front wheel is detected by the detector, that the detected signal is converted into an electric signal to be displayed on the gauge board, and that traveling speed and distance are visually displayed.

[38] It is still another aspect of the present invention to provide a tricycle kick board in which a front wheel and decks on which the feet of a rider are put are connected to each other by link frames and elastic connector members are mounted between a fixed pipe for supporting the front wheel and the link frames so that the link frames for connecting the decks to each other are lifted when the rider thrusts one deck in order to obtain a driving force and that the rider can easily obtain the driving force.

[39] It is still another aspect of the present invention to provide a tricycle kick board in which a front wheel and decks on which the feet of a rider are put are connected to each other by link frames and the link frames are elastically formed so that the length of the link frames increases when a force is applied to the decks and that the link frames are automatically contracted when the force is not applied to the decks to easily obtain a driving force.

Technical Solution

[40] In order to achieve the above objects, according to a first embodiment of the present invention, there is provided a tricycle kick board, comprising a connector pipe vertically provided in the center of a handle member having brake levers in both ends thereof, a fixed member partially accommodating the lower end of the connector pipe to control the height of the connector pipe and functioning as a vertical pole, a joint device fixed to the lower end of the fixed member, a front wheel provided in the lower end of the joint device to change a direction, and a pair of link frames one end of each of which is a fixed end mounted in the joint device to rotate at a uniform angle and the other end of each of which is a free end mounted in a deck under which wheels are mounted.

[41] The the joint device comprise upper and lower plates that remain separated from each other by a uniform distance by a side wall extended on one side, a pair of shafts interposed between the upper and lower plates, link frames inserted into the shafts, and springs provided on and under the link frames.

[42] At least one wheel is provided in each of the pair of decks together with a shaft and a frame is provided under the deck together with a shaft. A braking device is provided in the vicinity of one of the wheels to stop the rotation of the wheels by the brake levers. A shaft protrudes above the frame and a housing is formed to surround the shaft so that one side of the housing is opened and that each of the link frames is provided in the housing together with a shaft. Taps are formed on one side of the housing so that a foot board is fixed by a fastening device such as a bolt.

[43] The braking device comprises a lever frame elastically provided on one side of the frame by a spring, a lining mounted in the internal end of the lever frame toward the outer circumference of the wheel, a brake line fixed to one side of the frame, and an inner wire provided in the brake line so that one end thereof is connected to the brake levers and the other end thereof is connected to the lever frame.

[44] According to a second embodiment of the present invention, there is provided a tricycle kick board, comprising a joint device having a front wheel for changing a direction in the lower end thereof and a pair of link frames one end of each of which is a fixed end mounted in the joint device to rotate and the other end of each of which is a free end mounted in a deck under which wheels are mounted. One end is connected to the joint device and the other ends comprise hand brakes.

[45] The joint device comprise upper and lower plates that remain separated from each other by a uniform distance by a side wall extended on one side, a pair of shafts interposed between the upper and lower plates, link frames inserted into the shafts, and springs provided on and under the link frames.

[46] At least one wheel is provided in each of the pair of decks together with a shaft and a frame is provided under the deck together with a shaft. A braking device is provided in the vicinity of one of the wheels to stop the rotation of the wheels by the brake levers. A shaft protrudes above the frame and a housing is formed to surround the shaft so that one side of the housing is opened and that each of the link frames is provided in the housing together with a shaft. Taps are formed on one side of the housing so that a foot board is fixed by a fastening device such as a bolt.

[47] The braking device comprises a lever frame elastically provided on one side of the frame by a spring, a lining mounted in the internal end of the lever frame toward the outer circumference of the wheel, a brake line fixed to one side of the frame, and an inner wire provided in the brake line so that one end thereof is connected to the brake levers and the other end thereof is connected to the lever frame.

[48] According to a third embodiment of the present invention, there is provided a tricycle kick board, comprising a front wheel provided in the lower end of a vertically arranged pole shaped fixed member together with a shaft, a handle member arranged in the upper end of the fixed member from side to side and having grips in both ends thereof, a fixed pipe provided in the lower end of the fixed member positioned on the front wheel together with a shaft and in which a joint is mounted, a pair of link frames one end of each of which is connected to the joint, and decks that are provided in the other ends of the link frames and under which wheels are arranged.

[49] A pair of connector members formed of gas springs are arranged on both sides of the fixed pipe and under the pair of link frames.

[50] The tricycle kick board further comprises a detector mounted under the fixed member to generate an electric signal for detecting the rotation of the wheels and a gauge board mounted in the handle member to compute the electric signal generated by the detector and to display traveling speed and distance.

Advantageous Effects

[51] In the tricycle kick board according to the present invention, the rider applies his or her weight on the right and left decks and thrusts the opposite deck to which the weight of the rider is not applied in the opposite direction so that it is possible to safely obtain the driving force.

[52] Also, the decks on which the feet of the rider are put can rotate at a uniform angle and the feet of the rider can be opened and shut so that it is possible to generate the driving force, to run forward and backward in accordance with the direction of the feet and the direction in which the force is applied, and to implement various techniques that may interest the rider.

[53] Also, it is possible to determine the height of the handle member and the grips in accordance with the height of the rider without an additional device.

[54] Also, the brake levers are mounted in the grips and the grips are not fixed to a specific position so that the rider can freely use his or her hands to maximally protect his or her body when the rider falls.

[55] Also, when the tricycle kick board is kept or carried, the tricycle kick board is folded by a folding device or the decks are gathered so that it is possible to reduce the volume of the tricycle kick board and to easily carry or keep the tricycle kick board.

[56] Also, in the tricycle kick board according to the present invention, the decks are lifted by a physical force so that it is possible to easily obtain the driving force and the length of the link frames varies so that it is possible to obtain a larger driving force. [57] Also, information such as traveling speed and distance is displayed during traveling.

Best Mode for Carrying Out the Invention

[58] FIG. 1 illustrates an example of a tricycle kick board according to a first embodiment of the present invention. [59] FIG. 2 illustrates another example of the tricycle kick board according to the first embodiment of the present invention. [60] FIG. 3 illustrates a length determining device that is a main part of the tricycle kick board according to the first embodiment of the present invention. [61] FIG. 4 illustrates a joint device that is a main part of the tricycle kick board according to the first embodiment of the present invention. [62] FIGs. 5 and 6 illustrate a deck that is a main part of the tricycle kick board according to the first embodiment of the present invention. [63] FIG. 7 illustrates a tricycle kick board according to a second embodiment of the present invention. [64] FIGs. 8 and 9 are a detailed view and a side view illustrating a joint that is a main part of the tricycle kick board according to the second embodiment of the present invention. [65] FIG. 10 is a sectional view illustrating the joint of a link frame that is a main part of the tricycle kick board according to the second embodiment of the present invention.

Mode for the Invention [66] (Embodiment 1)

[67] A tricycle kickboard 1 according to the present invention comprises a connector pipe 5 vertically provided in the center of a handle 4 on whose both ends brake levers

3 a and 3b are provided. [68] The connector pipe 5 is connected to a fixed member 7 that accommodates a part of the lower end of the connector pipe 5 to control height and that functions as a vertical pole. [69] A joint device 11 is fixed to the lower end of the fixed member 7. A front wheel 14 is provided in the lower end of the joint device 11 to change the direction. [70] A pair of link frames 20a and 20b one end of each of which is a fixed end that is mounted in the joint device 11 to rotate at a uniform angle and the other end of each of which is a free end that is mounted in each of decks 23 a and 23b on the bottom surfaces of which wheels are mounted are provided in the joint device 11. [71] In order to effectively implement the above embodiment, in the joint device 11, upper and lower plates 12 and 13 that remain separated from each other by a uniform distance by a side wall 16 extended on one side are arranged with a pair of shafts 15a and 15b interposed. One end of each of the link frames 20a and 20b is inserted into each of the shafts 15a and 15b.

[72] Springs 17a 17b, 18a, and 18b for buffering and shock absorbing are provided on and under the link frames 20a and 20b.

[73] At least one wheel 28 or 29 is provided in each of the pair of decks 23a and 23b together with a shaft. A frame 24 is provided under each of the decks 23 a and 23b together with a shaft. A brake device 30 for stopping the rotation of the wheels by the brake levers 3 a and 3b is provided in the vicinity of the wheel 29.

[74] A shaft 25 protrudes above the frame 24. A housing 26 that is formed to surround the shaft 25 such that one side thereof is opened and that each of the link frames 20a and 20b is provided therein together with a shaft is provided. Taps 27 are provided on one side of the housing 26 so that a foot board 36 comprises a fastening device such as a bolt.

[75] The brake device 30 comprises a lever frame 31 elastically provided on one side of the frame 24 by a spring 33. A lining 32 is mounted in the internal end of the lever frame 31 toward the outer circumference of the wheel 29.

[76] A brake line 34 is fixed to one side of the frame 24. An inner wire 35 whose one end is connected to the brake levers 3 a and 3b and whose the other end is connected to the lever frame 31 is provided in the brake line 34.

[77] (Embodiment 2)

[78] According to a second embodiment of the present invention, a joint device 11 having a front wheel 14 for changing the direction in the lower end thereof is provided. A pair of link frames 20a and 20b one end of each of which is a fixed end that is mounted in the joint device 11 to rotate and the other end of each of which is a free end that is mounted in each of decks 23 a and 23b on the bottom surfaces of which wheels are mounted are provided.

[79] Each one end is connected to the joint device 11 and the other ends comprise brake levers 3 a and 3b.

[80] The joint device 11 comprises upper and lower plates 12 and 13 that remain separated from each other by a uniform distance by a side wall 16 extended on one side, a pair of shafts 15a and 15b interposed between the upper and lower plates 12 and 13, the link frames 20a and 20b inserted into the shafts 15a and 15b, and springs 17a 17b, 18a, and 18b provided on and under the link frames 20a and 20b.

[81] At least one wheel 28 or 29 is provided in each of the pair of decks 23a and 23b together with a shaft. A frame 24 is provided under each of the decks 23 a and 23b together with a shaft. A brake device 30 for stopping the rotation of the wheels by the brake levers 3a and 3b is provided in the vicinity of one of the wheels 28 and 29.

[82] A shaft 25 protrudes above the frame 24. A housing 26 that is formed to surround the shaft 25 such that one side thereof is opened and that the link frames 20a and 20b are provided therein together with a shaft is provided. Taps 27 are provided on one side of the housing 26 so that a foot board 36 comprises a fastening device such as a bolt.

[83] The brake device 30 comprises a lever frame 31 elastically provided on one side of the frame 24 by a spring 33. A lining 32 is mounted in the internal end of the lever frame 31 toward the outer circumference of the wheel 29. A brake line 34 is fixed to one side of the frame 24. An inner wire 35 whose one end is connected to the brake levers 3 a and 3b and whose the other end is connected to the lever frame 31 is provided in the brake line 34.

[84] (Embodiment 3)

[85] According to a third embodiment of the present invention, a front wheel is provided together with a shaft in the lower end of a vertically arranged pole shaped fixed member 7. A handle member 4 that are arranged from side to side and that comprise grips on both ends thereof is mounted in the upper end of the fixed member 7.

[86] A fixed pipe 51 mounted in a joint 50 is provided under the fixed member 7 positioned on the front wheel.

[87] A pair of link frames 55 one end of each of which is connected to the joint 50 are provided. Decks 23c under which wheels 14 are arranged are provided in the other ends of the link frames 55.

[88] A pair of connector members 57 composed of gas springs are provided on both sides of the fixed pipe 51 and under the pair of link frames 55.

[89] A detector 42 for generating an electric signal for detecting the rotation of the wheels is mounted under the fixed member 7. A gauge board 41 for computing the electric signal generated by the detector 42 to display traveling speed and distance is provided in the handle member 4.

[90] Hereinafter, the operations of the present invention will be described with reference to FIGs. 1 and 2.

[91] A rider repeats the operations of shutting and opening his or her ankles in a V shape to go forward.

[92] The rider repeats the operations of opening and shutting his or her ankles in a V shape to go backward.

[93] When the rider pulls the brake lever 3a or 3b on the side to which the rider wishes to change the direction, the corresponding deck 23a or 23b is braked and the opposite deck rotates using the braked deck as a shaft so that the direction is changed.

[94] In another traveling method, the rider may apply his or her weight to one deck 23a and thrust the other deck 23b. At this time, the opposite deck 23b to which the weight of the rider is not applied is lifted from the earth. With the deck lifted from the earth, the rider twists his or her ankles on the foot boards and thrusts the deck in a state where the direction of the wheels 28 and 29 is at 90 degrees or 45 degrees with respect to the direction in which the rider thrusts the deck. Therefore, the traveling force doubles so that the rider can increase speed as if riding on an inline skate.

[95] In still another traveling method, when the rider thrusts his or her legs in zigzags with his or her knees bent while running at certain speed, the speed increases. Such a method is similar to a method of riding on a roller skate.

[96] The rider may be out of balance while the decks 23a and 23b are separated from each other during traveling. In this case, when the weight of the rider is applied to the left deck 23a, the rider thrust the right deck 23a to balance himself or herself.

[97] When the rider is out of balance during traveling or collides with an obstacle in a state where the brake levers are not operated, the rider may take off his or her feet from the decks 23a and 23b to safely fall since his or her hands are free.

[98] When the road is not even during traveling, shock is applied. At this time, the wheels 28 and 29 absorb the shock and the link frames 20a and 20b and the joint device 11 absorb the shock by the plurality of springs 17a, 17b, 18a, and 18b so that the rider can safely run.

[99] Also, in the downhill road, the rider may pull the right and left brake levers 3a and

3b to reduce speed.

[100] When the rider keeps or carries the tricycle kick board, the tricycle kick board is folded by a folding device 19. In the embodiment where the handle member 4 is not formed, the decks 23a and 23b are gathered to reduce the volume of the tricycle so that the tricycle is kept and carried.

[101] In an embodiment where the handle member 4 for determining the direction of the front wheel 14 and a length determining device 6 for determining the height of the handle member 4 are excluded like in a second embodiment of the present invention, it is possible to prevent the rider from being injured by the handle member 4 when the rider unexpectedly falls forward. In particular, since the hands of the rider are free, the rider can safely fall.

[102] As illustrated in FIG. 7, in a tricycle kick board 1 according to a second embodiment of the present invention, a front wheel 14 is mounted under a fixed member 7 together with a shaft. The fixed member 7 is mounted in a fixed pipe 51 together with a shaft. A connector pipe 5 is mounted on the fixed member 7 so that the height of the connector pipe 5 is determined by the length determining device 6. A handle member 4 is mounted on the connector pipe 5 in a horizontal direction. Grips 2a and 2b are mounted in both ends of the handle member 4. A joint 50 for connecting a pair of link frames 55 to each other is formed under the fixed pipe 51. A deck 23c is formed in one end of each of the link frames 55.

[103] A fork is formed under the fixed member 7. The front wheel 14 is mounted in the fork together with a shaft. A detector 42 is mounted in the fork of the fixed member 7 to detect the number of rotations of the front wheel 14 and to generate an electric signal.

[104] A gauge board 41 is mounted in the handle member 4 to receive the electric signal generated by the detector 42 and to display traveling distance and speed by numbers.

[105] Since a well-known technology is used for the detector 42 and the gauge board 41, detailed description of the detector 42 and the gauge board 41 will be omitted.

[106] Brake levers 3a and 3b are mounted in the grips 2a and 2b and the structure of a common inline skate is applied to the decks 23c. When the brake levers 3a and 3b are operated, the wheels mounted in the decks 23c together with shafts are braked. Since a well-known technology is applied to such a brake device, detailed description of the brake device will be omitted.

[107] In the length determining device 6, the connector pipe 5 is inserted into the fixed member 7, a tapered screw is formed in the upper end of the fixed member 7, and a nut is fastened to the screw so that the connector pipe 5 is fastened or released in accordance with the fastening of the nut, to which a well-known technology is applied.

[108] The joint 50 will be described in detail with reference to FIGs. 8 and 9.

[109] As illustrated in FIGs. 8 and 9, the pair of link frames 55 are hinged on one side of the fixed pipe 51 and elastic connector members 57 are mounted in the lower end of the fixed pipe 51 and under the link frames 55.

[110] In particular, in the structure where the fixed pipe 51 and the pair of link frames 55 are hinged to each other, fixed members 52 are integrated with the fixed pipe 51, balls 53 are formed in the ends of the fixed members 52, and ball housings 54 are formed in the ends of the link frames 55 so that the balls 53 are inserted into the ball housings 54.

[I l l] That is, the link frames 55 may freely move in unspecified directions.

[112] Gas springs or hydraulic springs may be used as the connector members 57. The connector members 57 are contracted when a force is applied and are recovered when the applied force is removed. One end of each of the connector members 57 is connected to the lower end of the fixed pipe 51 by a hinge 56. The other ends of the connector members 57 are connected to the bottom surfaces of the link frames 55 by hinges 58.

[113] That is, when a force is applied downward to the link frames 55, the connector members 57 are contracted. When the applied force is removed, the connector members 57 are extended to lift the link frames 55.

[114] As illustrated in FIGs. 6 and 9, elastic extending units 60 with joints 65 whose length varies are formed in the link frames 55 so that the link frames 55 are folded in a horizontal direction.

[115] Fixed outer pipes 61 are extended in the ends of the link frames 55. Insertion pipes 62 are inserted into the fixed outer pipes 61. Tensile springs 63 are mounted between the inner ends of the fixed outer pipes 61 and the ends of the insertion pipes 62. The insertion pipes 62 move to the outside by the force applied by the rider so that the length of the link frames 55 increases. When the applied force is removed, the insertion pipes 62 are pulled by the tensile springs 63 so that the length of the link frames 55 is reduced.

[116] The joints 65 are formed so that the insertion pipes 62 extended from the link frames 55 and connector members 64 extended from the decks 23c are curved in the horizontal direction. Hinge coupling may be performed by shafts or bearings may be horizontally mounted.

[117] Hereinafter, the operations of the tricycle kick board according to the second embodiment of the present invention will be described with reference to FIGs. 6 to 9.

[118] A method of riding on the tricycle kick board is the same as the method of riding on the conventional kick board. A rider steps on the decks 23c and grasps the grips 2a and 2b to be prepared to run forward.

[119] Then, the rider moves the grips 2a and 2b in zigzags and shifts his or her weights from right to left and from front to rear to generate a driving force and to run forward.

[120] In particular, the rider thrusts the opposite foot to which his or her weight is not applied in the opposite direction to increase speed. In order to thrust the opposite foot, the opposite deck 23c must be lifted. In the tricycle kick board 1 according to the present invention, the opposite deck 23c is lifted to easily obtain the driving force.

[121] According to the present invention, since the fixed pipe 51 and the link frames 55 are connected to each other by the elastic connector members 57, the deck 23c is lifted by the connector members 57 so that it is possible to easily obtain the driving force.

[122] To be specific, the rider applies a force in zigzags when riding on a speed skate, an inline skate, and a roller skate. When the force is applied, the rider thrusts the opposite foot in the direction that forms a right angle with respect to the direction in which the tricycle kick board travels to obtain the driving force. When the front wheel 14 is moved in zigzags, it is possible to obtain the driving force.

[123] The driving force varies according as the weight of the rider is applied to which side at any point of time while the rider runs in zigzags. Such a technique is obtained by the effort of the rider.

[124] As described above, while the weight of the rider is shifted, the rider thrusts the opposite deck 23c to which the weight of the rider is not applied in the opposite direction. When the rider thrusts the opposite deck 23c, the opposite deck 23c is lifted by the connector members 57.

[125] In order to increase speed, the rider thrust the opposite deck in the direction that forms a right angle with respect to the direction in which the tricycle board travels. The distance by which the rider thrusts the opposite deck varies with the physical condition of the rider. When the rider thrusts the opposite deck, the insertion pipes 62 of the elastic extending units 60 are extended.

[126] When the weight of the rider is shifted to the other side so that the rider thrusts the opposite deck to the deck where the weight of the rider is applied, the force is not applied to the elastic extending units 60. In this state, the length of the link frames 55 is reduced by the tensile springs 63.

[127] The front wheel 14 rotates during traveling. The detector detects the rotation of the front wheel 14 to generate an electric signal. The generated electric signal is transmitted to the gauge board 41 so that the traveling distance and speed are displayed by numbers.

[128] When the rider wishes to stop, the rider operates the brake levers 3a and 3b mounted in the grips 2a and 2b so that the decks 23c are braked to reduce speed. As a result, the tricycle kick board is stopped.

[129] While this invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Industrial Applicability

[130] In the tricycle kick board according to the present invention, the rider can generate the driving force without stamping his or her foot on the earth to run forward and backward, can easily change the direction by braking one of the right and left braking devices, and can freely use his or her hands to safely enjoy riding.

[131] In the tricycle kick board according to the present invention, the decks on which the rider can step are integrated with each other so that the rider can generate the driving force without stamping his or her foot on the earth to run forward and backward. The elastic connector members are mounted in the link frames for connecting the front wheel and the decks to each other so that it is possible to easily obtain the driving force. The gauge board is mounted in the handle member so that information such as the traveling speed and the amount of exercise is displayed.

Claims

[1] A tricycle kick board, comprising: a connector pipe vertically provided in the center of a handle member having brake levers in both ends thereof; a fixed member partially accommodating the lower end of the connector pipe to control the height of the connector pipe and functioning as a vertical pole; a joint device fixed to the lower end of the fixed member; a front wheel provided in the lower end of the joint device to change a direction; and a pair of link frames one end of each of which is a fixed end mounted in the joint device to rotate at a uniform angle and the other end of each of which is a free end mounted in a deck under which wheels are mounted. [2] The tricycle kick board as claimed in claim 1, wherein the joint device comprise: upper and lower plates that remain separated from each other by a uniform distance by a side wall extended on one side; a pair of shafts interposed between the upper and lower plates; link frames inserted into the shafts; and springs provided on and under the link frames. [3] The tricycle kick board as claimed in claim 1, wherein at least one wheel is provided in each of the pair of decks together with a shaft and a frame is provided under the deck together with a shaft, wherein a braking device is provided in the vicinity of one of the wheels to stop the rotation of the wheels by the brake levers, wherein a shaft protrudes above the frame and a housing is formed to surround the shaft so that one side of the housing is opened and that each of the link frames is provided in the housing together with a shaft, and wherein taps are formed on one side of the housing so that a foot board is fixed by a fastening device such as a bolt. [4] The tricycle kick board as claimed in claim 3, wherein the braking device comprises: a lever frame elastically provided on one side of the frame by a spring; a lining mounted in the internal end of the lever frame toward the outer circumference of the wheel; a brake line fixed to one side of the frame; and an inner wire provided in the brake line so that one end thereof is connected to the brake levers and the other end thereof is connected to the lever frame. [5] A tricycle kick board, comprising: a joint device having a front wheel for changing a direction in the lower end thereof; and a pair of link frames one end of each of which is a fixed end mounted in the joint device to rotate and the other end of each of which is a free end mounted in a deck under which wheels are mounted, wherein one end is connected to the joint device and the other ends comprise hand brakes. [6] The tricycle kick board as claimed in claim 5, wherein the joint device comprise: upper and lower plates that remain separated from each other by a uniform distance by a side wall extended on one side; a pair of shafts interposed between the upper and lower plates; link frames inserted into the shafts; and springs provided on and under the link frames. [7] The tricycle kick board as claimed in claim 5, wherein at least one wheel is provided in each of the pair of decks together with a shaft and a frame is provided under the deck together with a shaft, wherein a braking device is provided in the vicinity of one of the wheels to stop the rotation of the wheels by the brake levers, wherein a shaft protrudes above the frame and a housing is formed to surround the shaft so that one side of the housing is opened and that each of the link frames is provided in the housing together with a shaft, and wherein taps are formed on one side of the housing so that a foot board is fixed by a fastening device such as a bolt. [8] The tricycle kick board as claimed in claim 7, wherein the braking device comprises: a lever frame elastically provided on one side of the frame by a spring; a lining mounted in the internal end of the lever frame toward the outer circumference of the wheel; a brake line fixed to one side of the frame; and an inner wire provided in the brake line so that one end thereof is connected to the brake levers and the other end thereof is connected to the lever frame. [9] A tricycle kick board, comprising: a front wheel provided in the lower end of a vertically arranged pole shaped fixed member together with a shaft; a handle member arranged in the upper end of the fixed member from side to side and having grips in both ends thereof; a fixed pipe provided in the lower end of the fixed member positioned on the front wheel together with a shaft and in which a joint is mounted; a pair of link frames one end of each of which is connected to the joint; and decks that are provided in the other ends of the link frames and under which wheels are arranged. [10] The tricycle kick board as claimed in claim 9, wherein a pair of connector members formed of gas springs are arranged on both sides of the fixed pipe and under the pair of link frames. [11] The tricycle kick board as claimed in claim 9, further comprising: a detector mounted under the fixed member to generate an electric signal for detecting the rotation of the wheels; and a gauge board mounted in the handle member to compute the electric signal generated by the detector and to display traveling speed and distance.