WO2007091785A1

WO2007091785A1 - Board apparatus

Info

Publication number: WO2007091785A1
Application number: PCT/KR2007/000284
Authority: WO
Inventors: Ji-Hoon Kim
Original assignee: Ji-Hoon Kim
Priority date: 2006-02-07
Filing date: 2007-01-17
Publication date: 2007-08-16
Also published as: KR100609653B1

Abstract

The present invention relates to a board apparatus, and more specifically to a board apparatus that enables the user to drive the board by a power applied from a power generating unit to a plurality of wheels through the gears mounted on the board panel.

Description

BOARD APPARATUS

Technical Field

[1] The present invention relates to a board apparatus, and more specifically to a board apparatus that enables the user to drive the board by a power applied from a power generating unit to a plurality of wheels through the gears mounted on the board panel.

Background Art [2] A conventional roller board comprises a board panel or two board panels pivotally connected each other and two wheel sets provided with two rollers each on the bottom of the board panel(s). [3] Also, a conventional kickboard has a long board panel and wheels mounted on the bottom of the long board panel, and a handle unit mounted on the front side of the board panel. [4] Such the conventional kickboard or roller board are propelled by the user kicking them during level ground driving. [5] Therefore, they had a problem that a lot of physical strength is required during a long time driving, and more strength is needed especially on an uphill road.

Disclosure of Invention

Technical Problem [6] Accordingly, to solve such problems, it is an object of the present invention to provide a board apparatus that enables the user to propel the board without kicking the ground by a power applied from a power generating unit to a plurality of wheels through the gears mounted on the board panel.

Technical Solution [7] To achieve the above objects, there is provided a board apparatus comprising: a board panel; a plurality of wheels mounted rotatably under said board panel; a first gear mounted on the bottom of said board panel; a second gear which is mounted on the outer circumference of the rotating axis of said wheel and is meshed with said first gear; and a power generating unit for rotating said first gear. [8] Wherein, said power generating unit comprises a push board whose one end is pivotally engaged with the upper side of said board panel; a tension spring mounted on said board panel; a wire one end of which is connected to said push board and the other of which is connected to said tension spring, and which winds said first gear; and a one-way clutch provided in said first gear or said second gear. [9] Preferably, the bottom of said push board and the upper side of said board panel are connected by stopper wire. [10] Preferably, a supporting pulley is mounted at upper end of a support which is fixed to said board panel, and one end of said wire winds said supporting pulley and is connected to the bottom of said push board.

[11] Preferably, hinge springs are mounted on one side of said push board and the hinge- mounting portion of said board panel.

[12] And, in accordance with the present invention, there is provided a board apparatus comprising: a board panel consisting of a front board panel and a rear board panel pivotally engaged with the front board panel; a plurality of wheels mounted rotatably under said board panel; a first gear mounted on the bottom of said board panel; a second gear which is mounted on the outer circumference of the rotating axis of said wheels and is meshed with said first gear; and a power generating unit for rotating said first gear, wherein said power generating unit comprises: a push board whose one side is pivotally engaged on the upper side of said board panel; tension springs mounted on said board panel; wires each one end of which is connected to said push board and the other end of which is connected to one of said tension springs and which winds said first gear; and a one-way clutch provided in said first gear or said second gear, a supporting pulley is mounted at upper end of a support which is fixed to said board panel, and each one end of said wires winds said supporting pulley and is connected to the bottom of said push board, and each wire winds the first gear mounted on said front board panel and the first gear mounted on the rear board panel in opposite direction each other.

[13] Preferably, a handle unit having a directional wheel is mounted on the front of said board panel, said push board consists of a left push board and a right push board, and a first gear and a second gear, a power generating unit and a supporting pulley which respectively correspond to said left push board and right push board, are mounted respectively on said board panel.

[14] Further, the power generating unit comprises a motor mounted on said board panel; a power supply unit for supplying power to said motor; a switch for operating said motor; and a connecting member which connects said motor and said first gear to transmit the rotatory force of said motor to said first gear.

Advantageous Effects

[15] According to the board apparatus of the present invention as described above, there are many advantageous effects as follows: [16] First, without the user kicking the ground, the board apparatus can move by means of a first gear and a second gear driven by the power applied from the power generating unit. [17] Second, by constructing the power generating unit with a push board, wire, tension spring and one-way clutch, the board apparatus can move by the user pushing the push board or taking his foot off the push board. [18] Also, when the user pushes the push board, he or she has an exercise effect like going up and down stairs, so there is an effect of exercising his or her lower part of the body while driving the board apparatus. [19] Third, the push board and board panel are connected with stopper wire, so that it is possible to lift the push board up while rotating within a predetermined angle range. [20] Fourth, supporting pulleys are mounted to make wire to be pulled more, so that it is possible to make the first gear rotate more rapidly when the user pushed the push board once. [21] In addition, wires are connected to the bottom of the board panel, so that the user can be prevented from being caught by the wire, and the wire can be prevented from being easily separated from the board panel.

[22] Fifth, since hinge springs are mounted between the push board and a hinge- mounting portion of the board panel, so that the push board can be easily lifted up. [23] Sixth, the board panel is separated in two to be pivotally engaged and wires are wound in different directions, so that the push board can be pushed by using both feet to make the board apparatus move more quickly. [24] Seventh, a handle unit is mounted on the front of the board panel for easy changing direction of the driving, and the push board is divided into a left and a right push boards for the user to advance by pushing the push board alternately while watching ahead. [25] Eighth, motor is used for the power generating unit, the board apparatus can be moved by a motorized system.

Brief Description of the Drawings [26] These and other features, aspects, and advantages of preferred embodiments of the present invention will be more fully described in the following detailed description, taken accompanying drawings. In the drawings: [27] Fig. 1 is a side view of a board apparatus according a first embodiment of the present invention; [28] Fig. 2 is a plan view of the board apparatus according the first embodiment of the present invention; [29] Fig. 3 is a front view of the board apparatus according the first embodiment of the present invention; [30] Fig. 4 is a bottom view of a push board of the board apparatus according to the first embodiment of the present invention; [31] Fig. 5 a side view of a board apparatus according to a third embodiment of the present invention; [32] Fig. 6 is a plan view of the board apparatus according to the third embodiment of the present invention; [33] Fig. 7 is a rear view of the board apparatus according to the third embodiment of the present invention; [34] Fig. 8 is bottom view of a push board of the board apparatus according to the third embodiment of the present invention; [35] Fig. 9 is a bottom view of a board apparatus according to a sixth embodiment of the present invention; [36] Fig. 10 is a schematic view showing principle of the power transmission of the boa rd apparatus according to the sixth embodiment of the present invention; and [37] Fig. 11 is a side view of a board apparatus of a seventh embodiment of the present invention.

Best Mode for Carrying Out the Invention [38] A plurality of preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. [39]

[40] First Embodiment

[41] Fig. 1 is a side view of a board apparatus according a first embodiment of the present invention, Fig. 2 is a plan view of the board apparatus according the first embodiment of the present invention, Fig. 3 is a front view of the board apparatus according the first embodiment of the present invention, and Fig. 4 is a bottom view of a push board of the board apparatus according to the first embodiment of the present invention. [42] As shown in Figs. 1 to 4, the board apparatus according to the first embodiment of the present invention comprises a board panel 110, wheels 120, a first gear 140, a second gear 150, and a power generating unit 130. [43] The board panel 110 may consist of one long panel, or consist of two panels connected each other by hinge engaging means. [44] In the present first embodiment, as shown in Figs. 1 and 2, two panels, that is, the front board panel 110a and the rear board panel 110b are pivotally engaged each othre to make the board panel 110. [45] Wheels 120 are rotatably mounted on the front board panel 110a and the rear board panel 110b respectively, and they include rollers 121 which are placed one each or left and right on the board panel 110 and a rotating axis 122 to rotatably install the rollers

121 at the opposite side of the board panels through support frames. [46] The first gear 140, as shown in Fig. 3, is rotatably mounted on the bottom of the board panel 110, and for this end, a rotating axis 141 is fixed on the bottom of the board panel 110, and the first gear 140 is mounted at lower end of the rotating axis 141 in parallel with the board panel 110.

[47] The second gear 150, as shown in Fig. 3, is mounted on the outer circumference of the rotating axis 122 of the wheels 120 and is meshed with the first gear 140.

[48] At this time, the first gear 140 is meshed with the second gear 150 at a right angle, and the first gear 140 and the second gear 150 are to use as a bevel gear or helical gear for transmitting power at a right angle.

[49] The power generating unit 130 transmits power to the first gear 140 to rotate it, and includes a push board 131, tension springs 133, wires 132, one-way clutch 134, supporting pulleys 160 and a plurality of pulleys 135, 136 and 137.

[50] On the front board panel 110a and the rear board panel 110b may be mounted respectively one tension spring 133, one wire 132, one supporting pulley 160 and a plurality of pulleys 135, 136 and 137 for use, but more preferably, as shown in Figs. 1 to 4, two tension springs 133, two wires 132, two supporting pulleys 160 and a plurality of pulleys are mounted.

[51] As shown in Fig. 1, one side of the push board 131 is pivotally engaged on the top of the board panel 110, and as shown in Fig. 4, has stepped portions 135a formed on the left and right sides, and on the stepped portions 135a are mounted the first pulleys 135 toward the hinge-mounting portion for operatively connecting the push board and the board panel 110.

[52] The supporting pulley 160 is mounted at upper end of a support which is fixed to the board panel 110 respectively, on both sides of the board panel 110 corresponding to the first pulleys 135.

[53] Also, it is preferable that the bottom of the push board 131 and the upper side the board panel 110 are connected by at least one stopper wire 170.

[54] Also, on one side of the push board 131 and the hinge-mounting portion of the board panel 110 are to be mounted hinge springs 139, as shown in Figs. 3 and 4.

[55] On the board panel 110 are formed through hole 112 adjacent to the supports of the supporting pulleys 160, and on the bottom of the board panel 110 are mounted the second pulleys 136 adjacent to the through holes 112, and on the bottom of the board panel 110 are mounted tension springs 133.

[56] One end of wire 132 is connected to the push board 131, and the other end goes through the first pulley 135, supporting pulley 160, through hole 112 and second pulley 136, winds the first gear 140, and is connected to the tension spring 133.

[57] At this time, the wire 132 winds the first gear 140, more specifically the rotating axis 141 of the first gear 140, and the rotating axis 141 is provided with a grid or a plurality of grooves to increase frictional force with the wire 132. [58] Also, it is preferable that the tension spring 133 is connected with the wire 132 in slacked condition to make it pull the wire 132 tautly.

[59] If the wire 132 is configured of two wires as shown in Fig. 2, each wire 132 is to wind the first gear 140 in the same direction.

[60] One end of the wire 132 may be connected to the top of the push board 131, but it is preferably connected to the bottom of the push board 131.

[61] Also, as shown in Fig. 1 and Fig. 2, a third pulley 137 may be mounted in the opposite direction of the tension spring 133, so that the other end of the wire 132 winds the first gear 140 and then goes through the third pulley 137 before it is connected to the tension spring 133.

[62] At this time, in the case of two wires 132, one of the two wires 132 winds the first gear 140 in a counterclockwise direction and goes through the third pulley 137 before it is connected to one of the tension springs 133, and the other wire 132 winds the first gear 140 in a counterclockwise direction, goes through the third pulley 137 before it is connected to the other tension spring 133.

[63] It is preferable that two rollers are mounted up and down one rotating axis of the third pulley 137 so that each of two wires 132 winds each roller in the third pulley 137.

[64] And, on the first gear 140 or the second gear 150 is provided with a one-way clutch

134, which is also called an overrunning clutch. This refers to a clutch which transmits rotatory force only in one direction while idling in the reverse direction.

[65] The first embodiment configured in the above structure is operated as follows:

[66] As shown in Fig. 1, when the user gets on board and pushes the push board 131 by foot with the push board 131 lifted up, the push board 131 is pivoted, with the center on the portion that is pivotally engaged with the upper side of the board panel 110 by a hinge pin, and at this time the wire 132 connected to the push board 131 is pulled.

[67] At this time, because the supporting pulley 160 is mounted at the upper end of the support in upwardly protruded state, the wire 132 can be pulled more by the rotation of the push board 131.

[68] The wire 132 goes through the first pulley 135, supporting pulley 160, through hole

112, and the second pulley 136 to wind the first gear 140, and again goes through the third pulley 137 before it is connected to the tension spring 133.

[69] Therefore, when one end of the wire 132 is pulled, the first gear 140 with the wire

132 wound is rotated, and the second gear 150, which is fixed on the outer circumference of the rotating axis in mesh with the first gear 140, is rotated by the rotation of the first gear 140, and eventually the wheels 120 are rotated through the rotating axis to make the board apparatus advance.

[70] When the user takes his or her foot off the push board 131, the wire 132 is moved in the direction of the tension spring 133 by the elastic energy stored in the tension spring 133 and the hinge spring 139 during the pushing process of the push board.

[71] Accordingly, the first gear 140 makes reverse rotation, and at this time, since oneway clutch 134 is provided in the first gear 140 or the second gear 150, it only idles without transmitting rotatory force to the wheels 120.

[72] By the elastic energy stored in the tension spring 133, the wire 132 is moved in the direction of the tension spring 133 to lift up the push board 131 again.

[73] At this time, the push board 131 is rotated by the stopper wire 170 to be lifted up within a predetermined angle range.

[74] The above operating sequence is repeated to make the board apparatus advance.

[75] Only one power transmission set of the power generating unit 130, the first gear 140 and the second gear 150 may be mounted on the board panel 110, or two power transmission set thereof may be mounted respectively on the front board panel 110a and the rear board panel 110b, as shown in Fig. 1 and Fig. 2, to be operated by using two feet.

[76] At this time, as shown in Fig. 2, the wire winding the first gear mounted on the front board panel 110a and the wire winding the first gear mounted on the rear board panel 110b are to wind the first gear in opposite direction each other.

[77] This way, pushing the push board mounted on the front board panel 110a and pushing the push board mounted on the rear board panel 110b can make the board apparatus move forward.

[78] Also, by making the wire winding the first gear mounted on the front board panel

110a and the wire winding the first gear mounted on the rear board panel 110b wind the first gear in the mutually same direction, it is also possible to push the push board mounted on the rear board panel 110b to make it play a role of brake.

[79] Also, by mounting the one-way clutch 134 in opposite direction, it is also possible to advance the board apparatus by taking the foot off the push board 131 and idle by pushing the push board 131. Mode for the Invention

[80] Second Embodiment

[81] The second embodiment is to rotate wheels by using motor; compared with the first embodiment, only the power generating unit is different; description will be centered on this.

[82] The power generating unit comprises a motor mounted on the board panel, a power supply unit for supplying power to the motor, a switch for operating the motor, and a connecting member as a power transmission means for transmitting the rotatory force of the motor to the first gear.

[83] The power supply unit is preferably to use battery as a power supply, and the connecting member is sufficient as long as it is a means of transmitting the rotatory force of motor to the first gear, such as wire, chain, timing pulley, and belt. [84] If chain or timing pulley is used for the connecting member, gear is to be mounted on the rotating axis of the motor. [85] In the second embodiment of the above structure, when the user turns the switch on, the motor is rotated, and the rotatory force of the motor is transmitted to the first gear through the connecting member. [86] As the first gear is rotated, the second gear in mesh with the first gear is rotated, and eventually wheels are rotated to make the board apparatus advance. [87]

[88] Third Embodiment

[89] Fig. 5 is a side view of a board apparatus according to the third embodiment of the present invention; Fig. 6 is a plan view of the board apparatus according to the third embodiment of the present invention; Fig. 7 is a rear view of the board apparatus according to the third embodiment of the present invention; and Fig. 8 is bottom view of a push board of the board apparatus according to the third embodiment of the present invention. [90] As shown in Figs. 5 to 8, the third embodiment of the present invention includes a board panel 310, wheels 320, a first gear 340, a second gear 350, a power generating unit 330 and a handle unit 380, and has a shape of an ordinary kickboard. [91] Only one set of the first gear 340, the second gear 350 and the power generating unit 330 may be mounted on one board panel 310, and two set thereof may be mounted on two board panels in parallel shown in Fig. 6 and Fig. 7. [92] The board panel 310 is made in a long rectangular shape, and has wheels 320 mounted rotatably on the bottom of the board panel 310, and includes rollers 321 placed under the left and right of the board panel 310 and a rotating axis 322 for rotatably connecting rollers 321 against the board panel through frames. [93] As shown in Fig. 7, the first gear 340 is rotatably mounted on the bottom of the board panel 310 by means of bearing. For this, on the bottom of the board panel 310 is fixed a rotating axis 341, on which is mounted the first gear 340 in parallel with the board panel 310. [94] The second gear 350 is mounted on the outer circumference of the rotating axis 322 having wheels 320 in mesh with the first gear 340, as shown in Fig. 7. [95] At this time, the first gear 340 is meshed with the second gear 350 at a right angle, and the first gear 340 and the second gear 350 are to use as a bevel gear or helical gear for transmitting power at a right angle. [96] The handle unit 380 includes a column vertically mounted on the front of the board panel 310, a grasp bar horizontally inserted at upper end of the column, a directional wheel 381 rotatably mounted at lower end of the column, and a hand lever 391 mounted on the grasp bar for operating a brake 390 mounted on the rotating axis 322 of the wheel 320. [97] The power generating unit 330 for transmitting power to the first gear 340 to rotate it includes a push board 331, tension springs 333, wires 332, one-way clutch 334, supporting pulley 360 and a plurality of pulleys. [98] The push board 331 includes a left push board 33 Ia and right push boar 33 Ib, which can be operated by using respectively one tension spring 333, one wire 332, one supporting pulley 360 and a plurality of pulleys. But more preferably, as shown in

Figs. 5 to 8, the left push board 331a and right push board 331b can be operated by using respectively two tension springs 333, two wires 332, one supporting pulley 360 and a plurality of pulleys. [99] The push board 331, as shown in Fig. 5, is pivotally mounted on the front side of the board panel 310, and as shown in Fig. 8, has the first pulley 335 mounted on the rear side by a support. [100] At this time, it is preferable to connect the bottom of the push board 331 and the upper side of the board panel 310 by the stopper wire 370. [101] The supporting pulleys 360 are mounted at upper end of supports which are fixed to the rear both side of the board panel 310 corresponding to the first pulleys 335. [102] On the board panel 310 are formed through holes 312 adjacent to supports of the supporting pulleys 360, and on the bottom of the board panel 310 are mounted second pulleys 336 adjacent to the through holes 312, and on the bottom of the board panel

310 are mounted tension springs 333. [103] The wire 332 has its one end connected to the push board 331 and the other end goes through the first pulley 335, the supporting pulley 360, the through hole 312 and the second pulley 336 and winds the first gear 340 before it is connected to the tension spring 333. [104] At this time, the wire 332 winds the first gear 340, specifically the rotating axis 341 of the first gear 340, and the rotating axis 341 has a grid or a plurality of groove formed to increase the frictional force with the wire 332. [105] Also, the tension spring 333 is preferably connected with the wire 332 in slacked condition so as to pull the wire 332 tautly. [106] If two wires 332 are mounted respectively on the left push board 331a and the right push board 331b as shown in Fig. 6, the wires 332 are to wind the first gear 340 in the same direction. [107] One end of the wire 332 may be connected to the top of the push board 331, but it is preferable to be connected to the bottom of the push board 331. [108] As shown in Fig. 5 and Fig. 6, a third pulley 337 may be mounted in the opposite direction of the tension spring 333, so that the other end of the wire 332 winds the first gear 340 and again goes through the third pulley 337 to be connected to the tension spring 333.

[109] At this time, in case of two wires 332, one of the two wires 332 winds the first gear

340 in counterclockwise direction, goes through the third pulley 337 to be connected to the tension spring 333, and the other wire 332 winds the first gear 340 in counterclockwise direction and goes through the third pulley 337 to be connected to the tension spring 333.

[110] It is preferable that the third pulley 137 has two rollers mounted up and down on one rotating axis and each of the two wires 132 winds each of the rollers in the third pulley 137.

[I l l] And, to the first gear 340 or the second gear 350 is provided with one-way clutch

334, which is also called an overrunning clutch. This refers to a clutch which transmits rotatory force only in one direction while idling in the reverse direction.

[112] The third embodiment configured in the above structure is operated as follows.

[113] As shown in Fig. 5, when the user gets on board and pushes the push board 331 by foot with the push board 331 lifted up, the push board 331 is pivoted, with the center on the portion that is pivotally engaged with the board panel 310, and at this time the wire 332 connected to the push board 331 is pulled.

[114] At this time, because the supporting pulley 360 is mounted at the upper end of the support in upwardly protruded state, the wire 332 can be pulled more by the rotation of the push board 331.

[115] The wire 332 goes through the first pulley 335, supporting pulley 360, through hole

312, and the second pulley 336 to wind the first gear 340, and again goes through the third pulley 337 before it is connected to the tension spring 333.

[116] Therefore, when one end of the wire 332 is pulled, the first gear 340 with the wire

332 wound is rotated, and the second gear 350, which is fixed on the outer circumference of the rotating axis in mesh with the first gear 340, is rotated by the rotation of the first gear 340, and eventually the wheels 320 are rotated through the rotating axis to make the board apparatus advance.

[117] When the user takes his or her foot off the push board 331 , the wire 332 is moved in the direction of the tension spring 333 by the elastic energy stored in the tension spring

333 and the hinge spring 339 during the pushing process of the push board.

[118] Accordingly, the first gear 340 makes reverse rotation, and at this time, since oneway clutch 334 is provided in the first gear 340 or the second gear 350, it only idles without transmitting rotatory force to the wheels 320.

[119] By the elastic energy stored in the tension spring 333, the wire 332 is moved in the direction of the tension spring 333 to lift up the push board 131 again. [120] At this time, the push board 331 is rotated by the stopper wire 370 to be lifted up within a predetermined angle range.

[121] The above operating sequence is repeated to make the board apparatus advance.

[122] Only one power transmission set of the power generating unit 330, the first gear 340 and the second gear 350 may be mounted respectively on the board panel 310, or as shown in Fig. 6 and Fig. 7, two power transmission set thereof are mounted on the left and right to be operated by using two feet. [123] Also, the one-way clutch 334 may be mounted in the opposite direction, so that the board apparatus can be advanced by taking foot off the push board 331 and idled by pushing the push board 331. [124]

[125] Fourth Embodiment

[126] The fourth embodiment is to rotate the wheels by using motor; compared with the third embodiment, only the power generating unit is different, so description will be focused on this. [127] The power generating unit comprises a motor mounted on the board panel, a power supply unit for supplying power to the motor, a switch for operating the motor, and a connecting member as a power transmission means for transmitting the rotatory force of the motor to the first gear. [128] The power supply unit preferably uses battery as power supply, and the connecting member is good enough if it is a means of transmitting rotatory force of the motor to the first gear, such as wire, chain, timing pulley or belt. [129] At this time, in the case of using chain or timing pulley for the connecting member, a gear is mounted on the rotating axis of the motor. [130] In the fourth embodiment of the aforementioned structure, when the user turns the switch on, the motor is rotated, so rotatory force of the motor is transmitted to the first gear by the connecting member. [131] As the first gear rotates, the second gear, which is in mesh with the first gear, is rotated, and eventually the wheels are rotated to advance the board apparatus. [132]

[133] Fifth Embodiment

[134] The fifth embodiment is to rotate the wheels by adding a gear so as to increase the speed, compared with the third embodiment, only the power generating unit is different, so description will be focused on this. [135] In accordance with the fifth embodiment, a left push board 331a and a right push board 331b are mounted on the board panel 310; one first gear 340 and one second gear 350 are mounted; concentric first spur gear (not shown) and second spur gear (not shown) are mounted on the rotating axis 341 of the first gear 340; and a third spur gear (not shown) in mesh with the first spur gear and a fourth spur gear (not shown) in mesh with the second spur gear are mounted on the bottom of the board panel 310. Also, it is possible that wire whose one end is connected to a left push board 331a is wound on the rotating axis of the third spur gear, and then the other end is connected to a tension spring 333, and wire 332 whose one end is connected to a right push board 331b is wound on the rotating axis of the fourth spur gear, and then the other end is connected to the tension spring 333.

[136] At this time, it is preferable that the third spur gear and the fourth spur gear have the diameter greater than that of the first spur gear and the second spur gear, so that the first gear and the second gear can be rotated more by the movement of wire for the board apparatus to move at faster speed.

[137]

[138] Sixth Embodiment

[139] Fig. 9 is a bottom view of a board apparatus according to the sixth embodiment of the present invention, and Fig. 10 is a schematic view of the board apparatus according to the sixth embodiment of the present invention.

[140] Also the sixth embodiment is to rotate the wheels by adding gear so as to increase the speed; compared with the third embodiment, only the power generating unit is different, so description will be focused on this.

[141] A left push board 331a and a right push board 331b are pivotally engaged on the board panel 310, one first gear 340 and one second gear 350 are mounted, a concentric first spur gear 340a is mounted on the lower end of the rotating axis 341 of the first gear 340, a second spur gear 340b in mesh with the first spur gear and a third spur gear 340c in mesh with the first spur gear are mounted on the bottom of the board panel 310, and a fourth spur gear 340c in mesh with the third spur gear is mounted.

[142] It is also possible that wire 332 whose one end is connected to the left push board

331a is wound on the rotating axis of the second spur gear, and then the other end is connected to the tension spring 333, and wire whose one end is connected to the right push board 331b is wound on the rotating axis of the fourth spur gear, and then the other end is connected to the tension spring 333.

[143] At this time, it is preferable that the second spur gear and the fourth spur gear have the diameter greater than that of the first spur gear, so that the first gear and the second gear are rotated more by the movement of wire for the board apparatus to move at faster speed.

[144]

[145] Seventh Embodiment

[146] Fig. 11 is a side view of a board apparatus according to the seventh embodiment of the present invention. [147] The seventh embodiment, as shown in Fig. 11, is to place the spur gears, which are mounted on the bottom of the board panel 310 in the fifth embodiment and the sixth embodiment, on the top of the board panel 310. Industrial Applicability

[148] The board apparatus according to the present invention can be applied to carts, wheelchairs, baby carriages and even to leisure footwear.

[149] Although the present invention has been described in detail reference to its presently preferred embodiment, it will be understood by those skilled in the art that various modifications and equivalents can be made without departing from the spirit and scope of the present invention, as set forth in the appended claims.

[150]

Claims

[1] A board apparatus comprising: a board panel; a plurality of wheels mounted rotatably under said board panel; a first gear mounted on the bottom of said board panel; a second gear which is mounted on the outer circumference of the rotating axis of said wheel and is meshed with said first gear; and a power generating unit for rotating said first gear, wherein said power generating unit comprises: a push board whose one end is pivotally engaged with the upper side of said board panel; a tension spring mounted on said board panel; a wire one end of which is connected to said push board and the other of which is connected to said tension spring, and which winds said first gear; and a one-way clutch provided in said first gear or said second gear. [2] The board apparatus of claim 1, wherein the bottom of said push board and the upper side of said board panel are connected by stopper wire. [3] The board apparatus of claim 1 or claim 2, wherein a supporting pulley is mounted at upper end of a support which is fixed to said board panel, and one end of said wire winds said supporting pulley and is connected to the bottom of said push board. [4] The board apparatus of claim 1 or claim 2, wherein hinge springs are mounted on one side of said push board and the hinge-mounting portion of said board panel. [5] A board apparatus comprising: a board panel consisting of a front board panel and a rear board panel pivotally engaged with the front board panel; a plurality of wheels mounted rotatably under said board panel; a first gear mounted on the bottom of said board panel; a second gear which is mounted on the outer circumference of the rotating axis of said wheels and is meshed with said first gear; and a power generating unit for rotating said first gear, wherein said power generating unit comprises: a push board whose one side is pivotally engaged on the upper side of said board panel; tension springs mounted on said board panel; wires each one end of which is connected to said push board and the other end of which is connected to one of said tension springs and which winds said first gear; and a one-way clutch provided in said first gear or said second gear, a supporting pulley is mounted at upper end of a support which is fixed to said board panel, and each one end of said wires winds said supporting pulley and is connected to the bottom of said push board, and each wire winds the first gear mounted on said front board panel and the first gear mounted on the rear board panel in opposite direction each other. [6] The board apparatus of claim 3, wherein a handle unit having a directional wheel is mounted on the front of said board panel, said push board consists of a left push board and a right push board, and a first gear and a second gear, a power generating unit and a supporting pulley which correspond respectively to said left push board and right push board, are mounted respectively on said board panel. [7] A board apparatus made by comprising: a board panel; a plurality of wheels mounted rotatably under said board panel; a first gear mounted on the bottom of said board panel; a second gear which is mounted on the outer circumference of the rotating axis of said wheels and is meshed with said first gear; and a power generating unit for rotating said first gear, wherein said power generating unit comprises: a motor mounted on said board panel; a power supply unit for supplying power to said motor; a switch for operating said motor; and a connecting member which connects said motor and said first gear to transmit the rotatory force of said motor to said first gear. [8] A board apparatus comprising: a board panel; a plurality of wheels mounted rotatably under said board panel; a first gear mounted on the bottom of said board panel; a second gear which is mounted on the outer circumference of the rotating axis of said wheels and is meshed with said first gear; and a power generating unit for rotating said first gear, wherein said power generating unit comprises: a push board whose one side is pivotally engaged with the upper side of said board panel; a tension spring mounted on said board panel; one or more spur gears mounted on the rotating axis of said first gear; one or more spur gears which are mounted on said board panel and are in mesh with said spur gears mounted on the rotating axis of said first gear; a wire one end of which is connected to said push board and the other end of which is connected to said tension spring, and winds the spur gear that is in mesh with the spur gear mounted on the rotating axis of said first gear; and a one-way clutch provided in said first gear or said second gear and said spur gears.