KR20060126294A - Roller board - Google Patents

Abstract

A roller board is provided, which enables a user to maintain easily a valance and to convert easily a direction even in a narrow space by adding a twisted rotating and horizontal rotating function of a front and rear board to a connection element to connect the front and rear board. The roller board includes boards(100a,100b), fixing frames(310a,310b) fixed to the bottom of the boards, arms(320a,320b) supporting rollers(330a,330b) and rotatably connected to the fixing frames, bolts(340a,340b) and nuts(360a,360b) for fastening the arms and fixing frames, and a brake unit for generating braking power by arresting rotation of the rollers. The brake unit comprises a brake shaft(440) that ascends and descends with respect to the arms and a pressure part for pressing the rollers through the brake shaft.

Description

ROLLER BOARD {ROLLER BOARD}

1 is an exploded perspective view showing a roller board according to an embodiment of the present invention.

Figure 2 is a perspective view of the combined state of Figure 1 combined.

3 is a cross-sectional view along the A-A direction of Figure 2 showing the compression and extension of the torsion spring during the torsional motion of the board.

Figure 4 is an operating state showing the horizontal rotation operation of the board by the horizontal spring in FIG.

Figure 5 is a cross-sectional view showing a state before braking as showing the structure of the brake unit according to the present invention.

FIG. 6 is a cross-sectional view showing a state after braking of FIG. 5; FIG.

7 is an exemplary view showing a folded state of the present invention.

<Explanation of symbols for the main parts of the drawings>

100a, 100b: Front and rear board 102: Hall

200: connector 210a, 210b: housing

212a, 212b: Extension 214a, 214b: Supporting jaw

216a, 216b: projecting hinge 220a, 222a, 220b, 222b: torsion spring

230a, 230b: Frame fixing tool 234a, 234b, 242a, 242b: Fixed end

240a, 240b: Board Fixture 250a, 250b: Connection Frame

260a, 260b: Horizontal spring 262a, 264a, 262b, 262b: Fixed part

310a, 310b: Fixed frame 320a, 320b: Arm

330a, 330b: Roller 332a, 332: Roller Shaft

340a, 340b: Bolt 352a, 354a, 352b, 354b: Bearing

360a, 360b: Nut 370a, 370b: Spring

380a, 380b: Pin 402: Brake Handle

404: brake cable 410: pressing member

412,414 Hinge 420 Axial bolt

422: ball 424: spring

440: brake shaft 430: shaft block

The present invention relates to a roller board to obtain a driving force by the motion of shaking the ankles or torso, and more particularly, easy to control the operation of the roller board during the running of the balance, easy to maintain balance and easy to change the direction even in a narrow space It is about a roller board to be able to perform.

As is well known, a skate board is known as a sports goods (exercise device) which puts both feet on a board and runs.

The basic configuration of such a skateboard has a wide, long oval plate having an area on which both feet can be placed, and a pair of rollers fixedly fixed to the bottom of the plate to make a rolling motion with the ground.

However, when the roller is traveling through the rolling motion with the ground as described above, the driver must perform the act of spurting the ground with one foot to obtain the speed, or the rotation radius increases when the direction is changed, and thus a lot of play space is required.

Due to this point, the conventional method of obtaining foot propulsion by rolling the foot as described above, in Korean Patent Publication No. 10-0394848, separates the front board and the rear board and fixes them through a connecting element, and at least one of the two boards. At least one directional caster attached to the bottom surface is attached, and a 'skateboard with directional casters' is provided, which is configured to elastically restore the torsional elements.

According to the skateboard of the above configuration, the user puts both feet on the front board and the back board of the skateboard, the directional caster repetitively about one axis by twisting the connecting element formed by the elastic body each time both feet are alternately inclined The driving is achieved by gaining the driving force during the angular movement.

However, the above-described conventional skateboard has only a torsional operation in which two spaced apart front boards and rear boards connected by an elastic body are rotated in opposite directions with respect to the axis of the elastic body, and the front board and the rear side with respect to the propulsion direction are provided. The disadvantage was that the board could not be turned left and right.

For this reason, the user's footing was only a torsional movement, so the footing flexibility was not free, and there was a limit to increasing the propulsion speed of the skateboard. There was no problem.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention by adding a function to enable the torsional rotation and horizontal rotation of the front and rear board to the connecting element connecting the front, rear board. It is to provide a roller board that can improve the reversibility even in a narrow space because the ease of manipulation and balance is easy and the rotation radius is small due to the free operation of the roller board.

Roller board of the present invention for achieving the above object is a board; A fixed frame fixed to the bottom of the board; An arm supported by the roller and rotatably coupled to the fixed frame; Bolts and nuts for fastening the arm and the fixed frame; And a brake unit for preventing a rotation of the roller and generating a braking force, wherein the brake unit includes a brake shaft which is lifted up and down with respect to the arm, and a pressing unit which presses the roller through the brake shaft. It features.

Here, the bolt is a hollow bolt having a hollow portion is employed therein, the pressing portion is configured to include a shaft bolt which is raised and lowered in the hollow bolt, and a shaft block coupled to the shaft shaft coupled to the brake shaft. It is desirable to.

The pressing unit may include a pressing member hinged to the board so as to press the shaft bolt, a brake cable connected to an end side of the pressing member facing the shaft bolt, and pulling the brake cable. It may be configured to further include a brake handle for rotating the pressing member.

In addition, the hollow bolt may be configured by further installing a spring for elastically supporting the shaft bolt.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing in detail the configuration of a roller board according to an embodiment of the present invention, Figure 2 is a perspective view showing a combined state shown in FIG.

As shown in Figure 1 and 2, the roller board of the present invention is largely the front board (100a), the rear board (100b) which is arranged at a predetermined distance apart from the rear side of the front board (100a), and the front , The connecting body 200 to elastically connect the rear board (100a) (100b), and the roller unit is installed on the bottom of the front, rear board (100a) (100b).

The front board (100a) and the rear board (100b) is a plate-shaped structure in which the feet can be raised, each upper surface is embossed in order to prevent the foot from slipping when running. In addition, a predetermined portion of the front and rear boards (100a, 100b) is formed with a plurality of holes 102 of a predetermined shape for the drainage of each board as well as to reduce the weight.

The connector 200 has a long shaft shape for elastically connecting the front and rear boards (100a, 100b), the front and rear boards around the longitudinal axis of the connector (200) A torsional rotation unit that enables the elastic torsional rotation operation of (100a) and (100b) and a horizontal rotation unit that enables the elastic horizontal rotation of the front and rear boards (100a, 100b).

The torsional rotation unit may include a housing 210a and 210b surrounding the horizontal springs 260a and 260b to be described later, and a pair of torsion springs 220a and 222a installed inside the housings 210a and 210b. 220b and 222b, frame fixtures 230a and 230b rotatably coupled to the housings 210a and 210b, and the torsion springs 220a, 222a, 220b and 222b are supported. Support jaws 214a and 214b are formed to face the housings 210a and 210b and the frame fixtures 230a and 230b, respectively.

The housings 210a and 210b have extended portions 212a and 212b which are portions having diameters extended at one end thereof, and a pair of torsion springs 220a formed on the inner circumferential surface of the expanded portions 212a and 212b. ) 222a, 220b and 222b are closely received so as to be symmetrical.

In this case, support jaws 214a and 214b protrude from the upper ends of the extension parts 212a and 212b so that each upper end of the torsion springs 220a, 222a, 220b and 222b can be supported from both sides. It is.

The frame fixtures 230a and 230b are fitted to the housings 210a and 210b with the torsion springs 220a, 222a, 220b, and 222b stored inside the extension portions 212a and 212b. Will be combined.

The torsion spring (230a, 230b) is fitted to the housing (210a, 210b) in the coupled state by the torsion springs (232a, 232b) formed in the center of the frame fixture (230a, 230b) 220a, 222a, 220b, and 222b are completely covered so that they do not escape to the outside.

In such a coupled state, relative rotation is possible about the longitudinal axis between the frame fixtures 230a and 230b and the housings 210a and 210b, wherein the frame fixtures 230a and 230b At the lower end of the support jaw (214a) (214b) formed in the expansion portion (212a) (212b), another support jaw is supported on both lower end portions of the torsion spring (220a) (222a) (220b) (222b) 214a and 214b are formed.

In addition, a flat plate-shaped fixed end 234a, 234b is formed at the end of the frame fixing tool 230a, 230b so that the fixing ends 234a, 234b are connected to each other by using bolts and nuts. It is fastened and fixed on the 250a) 250b.

FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 2 and schematically illustrates a process of compressing and extending the torsion spring inside the housing during the torsional rotation of the board.

Here, only the front board 100a side is illustrated and described for convenience, but the operation structure of the rear board 100b side is also the same as above.

As can be seen in Figure 3, when the front board (100a) is rotated in the right direction (clockwise) about the axis while the housing 210a is rotated in conjunction with the frame fixture 230a, upper and lower support jaw (214a) ( The right torsion spring 222a is compressed and the left torsion spring 220a is stretched and elastically deformed according to the gap change between 214b). On the contrary, when the front board 100a is rotated to the left (counterclockwise), the right torsion spring 222a is compressed. The spring 222a is elongated and the left torsion spring 220a is elastically deformed while being compressed. Therefore, even if left and right torsional rotation of the front board 100a is caused by the load, elasticity can be restored to its original state by the elasticity of the left and right torsion springs 220a and 222a installed therein.

On the other hand, the horizontal rotation unit of the present invention is coupled to the housing 210a, the board fixtures 240a and 240b fixed on the front and rear boards 100a and 100b, and the frame fixtures 230a and 230b. Connection frames (250a) and (b) coupled to the front and rear boards (100a) and (b) include horizontal springs (260a, 260b) fixed to the connection frame (250a, 250b) at the same time.

The board fixtures 240a and 240b form a cylindrical structure in which the horizontal springs 260a and 260b can be accommodated, and at one end, the fixed ends 242a in the form of flat plates, such as the frame fixtures 230a and 230b described above. A 242b is formed to fasten and fix the fixed ends 242a and 242b onto the front and rear boards 100a and 100b using bolts and nuts.

The board fixtures 240a and 240b may be rotated horizontally and right through bolts and nuts in a state of being enclosed in the protruding hinge portions 216a and 216b formed at the upper and lower portions of the housings 210a and 210b. Hinged so as to.

In addition, the ends of the board fixtures 240a and 240b on which the fixed ends 242a and 242b are formed, the upper ends of the board fixtures 242a and 242b are closed, and the lower ends are horizontal springs 260a and 260b. It has an open structure so that one end of the can pass.

The horizontal springs 260a and 260b are horizontally disposed along the longitudinal direction of the connecting body 200, and are formed at both ends of the horizontal springs 260a and 260b when the board fixtures 240a and 240b are fixed. The hook-shaped fixing portions 262a and 262b are passed through the open lower side of the board fixtures 240a and 240b and interposed between the fixing ends 242a and 242b and the front and rear boards 100a and 100b. It is fixed with the board fixtures 240a, 240b through the bolt and nut in the state.

In addition, the ends of the frame fixtures 230a and 230b are closed so that the upper side is closed and the lower side is opened so that the other end of the horizontal springs 260a and 260b can pass through the fixing ends 234a and 234b. Has a structure.

Therefore, when fixing the frame fixtures 230a and 230b, the fixed ends 234a and 234b of the horizontal springs 260a and 260b pass through the open lower side. In the state interposed between the front and rear boards (100a) (100b) is fastened and fixed through the bolt and nut.

At this time, the upper surface or the board fixture 240a (240b) of the front and rear boards (100a, 100b) in contact with both fixing portions (262a) (262b) (264a) (264b) of the horizontal spring (260a) (260b). The fixing parts 262a, 262b, 264a, and 264b may be inserted into the bottom of the fixing ends 242a and 242b of the bottom surface or the fixing ends 234a and 234b of the frame fixing tools 230a and 230b. By forming a groove having a predetermined shape, it is possible to prevent the increase of the fixing force of the fixing parts 264a and 264b and of course, the appearance of the beauty.

 The connecting frames 250a and 250b have a structure in which two left and right sides are engaged with each other in an uneven form, and they are coupled to each other by a hinge bolt 256 and a nut. Due to this structure, the left and right sides of the connecting body 200 can be folded and folded around the hinge portions of the connecting frames 250a and 250b, so as not to occupy much place during storage of the roller board.

In addition, in order to maintain the connector 200 in an unfolded state, a through hole is formed at an adjacent portion of the hinge parts of the connection frames 250a and 250b so that the fixing pin 254 is inserted into the through hole. In the state, the connection frames 250a and 250b are bent so that they cannot be folded.

4 schematically illustrates the horizontal rotation and elastic restoration of the board by the horizontal rotating unit.

Here, only the front board 100a side is illustrated and described, but the rear board 10b side, which is not shown, is also operated by the same operation structure.

As can be seen in Figure 4, the front board (100a) is a state capable of rotating in the horizontal left, right direction by the hinge coupling of the board fixture 240a and the housing 210a, such a front board (100a) When the horizontal left and right turns, the elastic restoring force can be restored to its original state by the elasticity of the horizontal spring 260a in the housing 210a.

The structure of the connection body 200 of the present invention is configured so that each of the front and rear boards (100a) and (100b) through the torsion rotation unit and the horizontal rotation unit to enable the elastic torsion rotation and horizontal rotation at the same time, the connector (200) At least one of the front and rear boards (100a) (100b) to change the structure so that at least one of the front and rear boards (100a, 100b) to perform the elastic torsional rotation operation It may be configured to perform an elastic horizontal rotation operation.

For example, only the front board 100a makes the torsional rotation and the horizontal rotation while the rear board 100b is fixed, or the front board 100a makes the torsional rotation only the rear board 100b the horizontal rotation, or the front side. The board 100a may be torsionally rotated and rotated horizontally, but the rear board 100b may be implemented by various implementation methods such as horizontal rotation only.

On the other hand, the roller unit of the present invention, as shown in Figure 1, the fixed frame 310a (310b) and the rollers (330a, 330b) fixed to each bottom surface of the front and rear boards (100a, 100b) is supported Hollow bolts (340a) (310a) (320b) rotatably coupled to the fixed frame (310a) (310b), the arm (320a) (320b) and the fastening frame (310a) (310b) for fastening 340b) and nuts 360a and 360b.

A pair of rollers 330a and 330b are rotatably fixed to the arms 320a and 320b through roller shafts 332a and 332b and bolts 334a and 334b.

Bearing frames 352a, 354b, 352b, and 354b are mounted on the fixing frames 310a and 310b, and the hollow bolts 340a and 340b are provided from the lower portions of the arms 320a and 320b. Nuts 360a and 360b at the ends of the hollow bolts 340a and 340b while being inserted through the bearings 352a, 354b, 352b and 354b and the fixing frames 310a and 310b. And are rotatably coupled to the arms 320a and 320b.

At this time, the hollow bolts 340a and 340b have a bolt shape in which a hollow penetrates along the longitudinal direction therein, and the nuts 360a and 360b are provided with two upper and lower parts, and each nut ( 360a and 360b are coupled to each other via washers 390a and 390b.

In addition, the roller unit is provided with springs 370a and 370b to forcibly hold the traveling directions of the rollers 330a and 330b in a predetermined direction.

That is, the pins 380a and 380b are coupled to the pins 380a and 380b on the fixing frames 310a and 310b fixed to the front and rear boards 100a and 100b. And one end of the springs 370a and 370b is formed in the washers 390a and 390b which are rotated together with the arms 320a and 320b. It is.

Therefore, even when a situation in which the front and rear boards 100a and 100b are lifted when the roller board is driven occurs, the predetermined positions (eg, forward directions) of the arms 320a and 320b are caused by the elasticity of the springs 370a and 370b. As a result, the rollers 330a and 330b are always held in a stable position so that a stable landing operation can be realized.

5 and 6 are cross-sectional views showing in detail the structure of the brake unit according to the present invention. FIG. 5 shows a state before the roller is braked, and FIG. 6 shows a state after the braking according to FIG.

1 and 5, 6, the roller board of the present invention is equipped with a brake unit capable of generating a braking force by preventing the rotation of the roller.

The brake unit is composed of a brake shaft 440 that is raised and lowered relative to the arm 320b, and a pressing unit for pressing the roller 330b through the brake shaft 440.

The pressing part includes an axial bolt 420 inserted into the hollow bolt 340b to move up and down, and a shaft block 430 coupled to the brake shaft 440 and fastened to the axial bolt 420.

In addition, the pressing member 410 hinged to the rear board (100b) so as to press the shaft bolt 420, and the end side of the pressing member 410 facing the shaft bolt 420 And a brake handle 402 connected to the brake cable 404 and connected to the brake cable 404 and pulling the brake cable 404 to rotate the pressing member 410.

The hollow bolt 340b is provided with a spring 424 for elastically supporting the shaft bolt 420.

A pair of hinge pieces 412 and 414 for mounting the pressing member 410 is fixed to the bottom of the rear board 100b through bolts and nuts, and the pressing member 410 is connected to both side hinge pieces ( 412 and 414 are hinged by the hinge shaft 316 in an interposed state.

One end of the pressing member 410 is connected to the brake cable 404 penetrating downward through the rear board 100b, and when the brake cable 404 is pulled upward, it can be rotated about the hinge shaft 316. It is supposed to be.

The shaft bolt 420 is inserted into the inner hollow of the hollow bolt 340b fastened through the arm 320b and the fixing frame 310b of the roller unit together with the spring 424 in the nut at the end thereof. It is fixed by fastening the 360b, so that it can be pressed downward through the pressing member 410 in the elastically supported state by the spring 424.

At this time, the pressing member 410 and the shaft bolt 420 is in contact with the ball 422 is preferably installed for smooth operation between the two contact members. Of course, the upper head of the shaft bolt 420 is configured by providing a groove in which the ball 422 is seated.

On the other hand, the arm 320b is provided with a brake shaft 440 for pressing and braking the roller 330b. The brake shaft 440 is fitted through the long hole 322 formed in the arm 320b and is guided along the long hole 322 when braking and presses and brakes the roller 330b located below.

The brake shaft 440 is coupled with the shaft block 430 which is fastened to the end of the shaft bolt 420 by a nut to interlock when the shaft bolt 420 is raised and lowered.

According to this configuration, as can be seen in the operating state of Figures 5 and 6, when the brake handle 402 is pulled during braking of the roller board by the rotation of the pressing member 410 connected to the brake cable 404 The shaft bolt 420 is pushed downward while receiving the elasticity of the spring 424, and the brake shaft 440 is lowered in conjunction with the spring 424 to generate a braking force by pressing the roller 330b.

Hereinafter, the operation of the present invention will be described with reference to the accompanying drawings.

First, if the user tilts the foot on the front board (100a) to the right in the direction of travel when the roller board is running, the arms (320a, 320b) of the front board (100a) is returned to the left of the opposite direction and the roller (330a) 330b is rolled toward the right to rotate the right side. On the contrary, when the foot on the rear board 100b is inclined to the right in the direction of travel, the arms 320a and 320b of the rear board 100b return to the left in the opposite direction and the rollers 330a and 330b roll to the right. The rear board 100b rotates to the left as a result of the right rotation.

As described above, the user generates the thrust of the roller board through the process of repeatedly twisting the front board 100a and the rear board 100b to the left and the right in the traveling direction by using both feet. will be.

In this process, the front and rear boards 100a and 100b have an interaction between the support jaw 214a and 214b and the torsion springs 220a, 222a, 220b and 222b shown in FIG. By the elastic restoring force is to always return to a predetermined position.

In addition, the front and rear boards (100a, 100b) can be rotated in the horizontal left and right with respect to the traveling direction by the hinge coupling between the board fixture 240a (240b) and the housing (210a, 210b). In the horizontal rotation, as shown in the operation diagram shown in FIG. 4, the elastic restoring force acts by the horizontal springs 260a and 260b inside the housings 210a and 210b to always elastically restore to a predetermined position. .

Thus, the roller board of the present invention is provided with a torsion rotation unit capable of elastic torsion rotation and restoration and a horizontal rotation unit capable of elastic horizontal rotation and restoration on the connecting body 200 connecting the front and rear boards (100a) (100b). Since the torsional rotation and horizontal left and right rotational movements about the longitudinal axis are induced through the torsional rotation unit and the horizontal rotational unit at the time of running the roller board, the user's footing is free and flexible, which makes it easier to balance the rollers. Not only can it increase the propulsion speed of the board, but it can also be used effectively in narrow driving spaces due to improved left and right turnability while driving.

On the other hand, during braking of the roller board of the present invention, when the brake handle 402 of the brake unit is pulled out, the pressing member 410 presses the shaft bolt 420 downward and the brake coupled to the bottom of the shaft bolt 420. Since the shaft 440 is configured to brake by pressing the roller 330b, the shaft 440 eliminates the hassle and risk of braking by using the foot as in the related art, and has an advantage of implementing a safe and easy braking.

In addition, when the roller board is stored, it is possible to fold the connecting body 200 by separating the fixing pins 254 coupled between the connection frames 250a and 250b, so that the space according to the storage of the roller board is maintained. It is very useful for securing.

As described above, although described with reference to preferred embodiments of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below And can be changed.

According to the present invention having the above-described configuration, the following effects can be expected.

First, the torsional rotation unit capable of rotating and restoring the elastic torsion unit and the horizontal rotation unit capable of elastic horizontal rotation and restoration on the connecting body connecting the front and rear boards, the torsional rotation between the front and rear boards and horizontal left and right rotation This freedom makes it easy for users to operate and maintain balance, which not only reduces the risk of safety accidents, but also increases the roller board's quality as well as the propulsion speed of the roller board. The right turn is improved, so there is an excellent effect that can be usefully used even in a narrow driving space.

In addition, by implementing a mechanical configuration that enables torsional rotation and horizontal rotation of the front and rear boards to be possible within a single connection body can implement the product compactly without a separate complex configuration, the performance of the product is conventional While it is much better, the cost of production can be improved without much increase.

In addition, the horizontal spring employed in the horizontal rotating unit is not only elastic restoring function during horizontal rotation of the front and rear boards but also elastic restoring function during torsional rotation. Function can be performed.

Second, by adopting the brake unit in the roller board of the present invention, because the roller board can be braked by controlling the rotation of the roller through the brake unit when the roller board is running, safety accidents due to overspeed or breakage of the roller board while driving It can prevent it beforehand.

In addition, by employing a hollow bolt having a hollow formed therein in the brake unit to fasten the arm and the fixed frame, the shaft bolt is raised and lowered inside the hollow bolt, so that a braking action is performed. There is no need to install a separate structure for the lifting operation can be simplified structure and prevent the appearance is impaired.

Further, when the brake unit adopts a configuration of a brake shaft which is raised and lowered with respect to the arm, an axis bolt which is raised and lowered in the hollow bolt, and a shaft block coupled with the brake shaft and fastened to the shaft bolt, Braking may be achieved by a simple operation of pressing the shaft bolt with a foot.

Further, a pressing member fixed to the hinge on the board to press the shaft bolt, a brake cable connected to the end side of the pressing member facing the shaft bolt, and a brake handle for pulling the brake cable to rotate the pressing member. If the configuration is further added, the braking can be achieved by a simple operation of pulling the brake handle while the roller board is running, thereby reducing the hassle and risk of braking by using the foot, and thus safe and easy braking action. There is an advantage to this.

In addition, the brake shaft and the roller interfere with each other because the shaft bolt can always be returned to its original position through the spring after the brake of the roller is released by installing a spring capable of elastically supporting the shaft bolt in the hollow bolt. Can be prevented.

Third, by adopting an elastic member for forcibly holding the position of the arm in the roller unit of the present invention to elastically restore the advancing direction of the roller in a certain direction, a situation occurs in which the front and rear boards are lifted while the roller board is running. In addition, since the arm is elastically restored to its original position by the elastic member, it is possible to prevent the unsafe landing phenomenon caused by the rotation of the roller in any direction, thereby eliminating the risk of safety accident.

In addition, by fastening the two nuts to the bolt inserted through the arm and the fixed frame of the roller unit, and configured to support the elastic member to the washer and the fixed frame through the washer between the nut, thereby supporting the elastic member. In order to have a hole in a thick structure such as a nut there is an advantage that does not have to support the elastic member.

Fourth, by constructing a structure that can fold the connecting body connecting the front and rear boards, there is a very advantageous advantage in securing the space when storing the roller board, and when using it is realized by a simple operation to expand the connecting body by plugging the fixing pin By doing so, there is an effect of improving the convenience of the user.

Fifth, by adopting a pair of rollers on the front and rear boards, respectively, it is easier to maintain the balance of the roller board than the conventional single roller configuration, thereby improving the safety problem.

Sixth, by embossing the upper surface of the front and rear boards, it is possible to prevent the shape of the foot slipping during driving, and by forming a plurality of holes of the predetermined shape in the front and rear boards, the effect of weight reduction and weight reduction of the board There is an advantage to get.

Claims (4)

board; A fixed frame fixed to the bottom of the board; An arm supported by the roller and rotatably coupled to the fixed frame; Bolts and nuts for fastening the arm and the fixed frame; And It comprises a brake unit for generating a braking force by preventing the rotation of the roller, The brake unit is a roller board, characterized in that consisting of a brake shaft which is raised and lowered relative to the arm, and a pressing portion for pressing the roller through the brake shaft. According to claim 1, The bolt is a hollow bolt having a hollow portion therein, The pressurizing portion is a roller board, characterized in that it comprises a shaft bolt which is raised and lowered in the hollow bolt, and the shaft block coupled to the brake shaft and coupled to the shaft bolt. The method of claim 2, wherein the pressing member is hinged on the board so as to press the shaft bolt, A brake cable connected to an end side of the pressing member facing the shaft bolt; And a brake handle for pulling the brake cable to rotate the pressing member. The roller board according to claim 2 or 3, further comprising a spring installed in the hollow bolt to elastically support the shaft bolt.

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