WO2013012129A1

WO2013012129A1 - A skateboard with an auxiliary caster module

Info

Publication number: WO2013012129A1
Application number: PCT/KR2011/007719
Authority: WO
Inventors: Young Seung Ko
Original assignee: Young Seung Ko
Priority date: 2011-07-21
Filing date: 2011-10-18
Publication date: 2013-01-24
Also published as: KR20130011509A; KR101265864B1

Abstract

The present invention relates to a skateboard with an auxiliary caster module, and more particularly, to a skateboard which includes a detachable caster module with two auxiliary casters on it and it is assembled to the connecting part of the skateboard which has the front and the rear board separately. A teenager or a beginner can enjoy stable riding on the skateboard accoding to the present invention. Moreover the twisting angle of the front board or rear board is limited by projected stoppers for safer riding on the skateboard of the present invention and a user can take apart the auxiliary caster module if not necessary and enjoy riding on the skateboard without it.

Description

A SKATEBOARD WITH AN AUXILIARY CASTER MODULE

The present invention relates to a skateboard with an auxiliary caster module, and more particularly, to a skateboard which includes a detachable caster module with two auxiliary casters on it and it is assembled to the connecting part of the skateboard which has the front and the rear board separately.

A teenager or a beginner can enjoy stable riding on the skateboard accoding to the present invention. Moreover the twisting angle of the front board or rear board is limited by projected stoppers for safer riding on the skateboard of the present invention and a user can take apart the auxiliary caster module if not necessary and enjoy riding on the skateboard without it.

In general, a skateboard includes a longitudinal oval plate and two sets of wheels each having two rollers mounted on the bottom of the plate. This conventional skateboard can be accelerated by a rider's stamping on the ground at the time of straightly traveling and can be steered by the rider's leaning to the left and the right side at the time of turning.

And, a skateboard which is divided into a front board and a rear board has been recently proposed. The skateboard divided into two parts includes a plate divided into a front board and a rear board, a hinge unit connecting the front board and the rear board, and casters movably mounted on the bottoms of the divided boards.

Such a skateboard divided into two parts is disclosed in U.S. Patent No. 4,076,267, U.S. Patent No. 4,082,306, JP-UM-A-1-117385, JP-UM-A-13-29663, and Korean Patent Nos. 394848 and 505754. On the other hand, the technique of accelerating a skateboard divided into two parts by twisting the skateboard is disclosed in U.S. Patent No. 1,056,357 and Korean Unexamined Patent Application Publication No. 2002-28361.

The publications disclose a structure in which a skateboard is divided into two boards, the divided boards are connected by an elastic hinge unit, and casters are mounted on the bottoms of the boards.

Fig. 1 is a perspective view illustrating a conventional skateboard with two casters installed.

Referring to Fig. 1, in the prior art, the skateboard includes hinge structure and casters. The hinge structure connects the front board (FB) and the rear board (RB) and with which the twisted front board or rear board can be restored to its original position. The casters are installed on the bottom of the front board and the rear board one by one.

Fig. 2 is a diagram illustrating a usage of the conventional skateboard in the prior art.

As shown in Fig. 2, when a rider places his or her feet on the front board (FB) and the rear board (RB) of the skateboard in the prior art and twists the front board (FB) and the rear board (RB) with snaps of ankles and legs, the twisted front board (FB) is force to get back in parallel with the rear board (RB) by the elastic restoring means such as spring installed in the hinge structure, the skate board acquires the driving force.

In the prior art, since the skateboard has casters placed at the front and the rear one by one it is very difficult for a beginner to ride on it. He has a hard time keeping his balance on the skateboard with two casters installed when he is beginning to ride on it. Especially, in case the rider is a teenager he is apt to be fallen off and injured while riding on the skateboard.

Therefore, the present invention is invented to solve the conventional problems and the object of the present invention is to provide the skateboard with an auxiliary caster module which is detachable to the connecting part of the skateboard in a user's need. A beginner can ride on the skateboard with the auxiliary caster module attached in the beginning and he may take apart the auxiliary caster module when he is accustomed to riding on the skateboard of the present invention.

To accomplish the above-mentioned object, according to an aspect of the invention, there is provided a skateboard with an auxiliary caster module comprising: a front board; a rear board; and said auxiliary caster module which being installed on a connecting part which connecting said front board and said rear board, wherein said auxiliary caster module including projected stoppers being installed two by two at front and rear .

In the skateboard with an auxiliary caster module, wherein on top of said projected stoppers 810, a cushion part being installed on respectively.

In the skateboard with an auxiliary caster module, wherein in said each projected stopper a groove is installed and a coil spring is installed in said each groove, and a cushion part is installed on top of said coil spring.

In the skateboard with an auxiliary caster module according to claim 1, wherein said connecting part is in concavo-convex shape.

In according with the present invention of the skateboard with an auxiliary caster module, a user can put together the auxiliary caster module with the skateboard or take it apart off the skateboard in the user's need.

Additionally, the auxiliary caster module has four projected stoppers and two stoppers on the front and the other two stoppers on the rear. When the front board or rear board is twisted at more than a certain angle the declination stops at the top of the projected stoppers so that the beginner can ride on the skateboard of the present invention safer and earlier.

Moreover, because a cushion part which made of soft rubber or silicon is installed on the top of the each projected stopper the front and the rear board are placed in parallel with the ground when no one ride on the skateboard. When the user ride on the skateboard of the present invention by twisting the front and the rear board with his both feet the cushion parts cushion the impact of the bottom of the front and the rear board to the projected stoppers thereby extending the lifetime of the product.

And since the connecting part of the skateboard of the present invention is in concavo-convex shape and the upper and lower fitting parts of the auxiliary caster module are in reverse concavo-convex shape, it prevents the auxiliary caster module from being assembled in the reverse direction.

Fig. 3 is a perspective view illustrating the skateboard with an auxiliary caster module installed according to the present invention.

Fig. 4 is a sectional view of A-A' in Fig. 3 illustrating that the left and the right bottoms are upheld by the projected stoppers.

Fig. 5 is an exploded perspective view of the skateboard with an auxiliary caster module installed according to the present invention.

Fig. 6 is a partially enlarged perspective view of the projected stoppers of the auxiliary caster module according to the present invention.

Fig. 7 is an assembly view illustrating that the auxiliary caster module is assembled to the connecting part of the skateboard according to the present invention.

Fig. 8 is a side view of the skateboard with the auxiliary caster module installed according to the present invention.

Fig. 9 is a partially enlarged view of C of Fig. 8.

Fig. 10 is a partially enlarged view of an internal structure of a modified projected stopper according to the present invention.

Fig. 11 is a bottom view of the skateboard with the auxiliary caster module installed according to the present invention.

Description of Reference Numerals and Signs

800: auxiliary caster module

805: cushion part

810: projected stopper

812: groove

814: coil spring

820: caster

830: cover

832: upper fitting part

834: nut

836: hole

840: underbody

842: coupling means

844: lower fitting part

900: connecting part

H: HINGE UNIT

FB: FRONT BOARD

RB: REAR BOARD

The configuration and operation of a skateboard with the auxiliary caster module according to an embodiment of the invention will be described in detail with reference to the accompanying drawings.

Fig. 3 is a perspective view illustrating the skateboard with the auxiliary caster module installed according to the present invention. Fig. 4 is a sectional view of A-A' in Fig. 3 illustrating that the left and the right bottoms are upheld by the projected stoppers.

As shown in Fig. 3 and Fig. 4, in the skateboard with the auxiliary caster module, the auxiliary caster module is installed and assembled to the connecting part 900 which connects the front board (FB) and the rear board (RB) of the conventional skateboard with two casters installed according to the embodiment of the present invention.

The auxiliary caster module 800 includes two casters 820 of which each installed at the right and left side, and it prevents the skateboard according to the present invention from being declined to the left or right side. The user can enjoy safer riding on the skateboard according to the present invention.

The auxiliary caster module 800 comprises totally four projected stoppers 810 and two stoppers 810 are installed at the front and the other two projected stoppers 810 are installed at the rear. A cushion part 805, which being made of soft rubber or silicon is installed on the top of the each projected stopper 810.

The top surface of each projected stopper 810 is spaced out from the bottom of the front board (FB) and the rear board (RB) of the skateboard at a small interval according to the embodiment of the present invention.

Without the cushion part 805 installed on the top of each projected stopper 810 the front board (FB) and/or the rear board (RB) of the skateboard is likely to be declined to one side so that the bottom of the front board (FB) or the rear board (RB) is in touch with the top of the projected stopper 810.

The cushion part 805 is made of soft rubber or silicon and installed on the top of the projected stoppers respectively. Because the each interval between the top of the projected stopper 810 and either the bottom of the front board (FB) or the rear board (RB) is occupied with the cushion part 805, the front board (FB) and the rear board (RB) of the skateboard can stand in parallel with the ground when it is placed on the ground as it is.

When a user places each foot on the front board (FB) and the rear board (RB) of the skateboard according to the embodiment of the present invention, the twisting angle in the arrow pointing direction may be limited by the each projected stopper 810. Under this structure the front board (FB) or the rear board (RB) of the skateboard may not be twisted over the limit of the top of the projected stopper 810 so that the user may enjoy safer riding on the skateboard according the embodiment of the present invention.

In the present invention, the maximum twisting angle of the front board (FB) or the rear board (RB) is limited to 8 ~ 13 degree for safer riding, and it is favorable to have 10 degree of the twisting angle.

Referring to Fig. 5, the auxiliary caster module 800 is comprised of an underbody 840 on which two casters 820 are installed, one caster 820 at the right side and the other caster 820 at the left side, and a cover 830. A lower fitting part 844 in the middle of the underbody 840 wears the lower half of the connecting part 900 and the cover 830 wears the upper half of the connecting part 900 of the skateboard according to the present invention.

Each caster 820 according to the present invention is coupled with the underbody 840 with a coupling means 842 such as a bolt and a nut. The lower fitting part 844 is in reverse shape to the concavo-convex shape of the connecting part 900 of the skateboard to get the connecting part 900 of the skateboard fit into the lower fitting part 844. This structure prevents the auxiliary caster module 900 from being coupled with the connecting part 900 of the skateboard in the opposition direction. If the auxiliary caster module 800 is assembled reversely, namely back to front, the direction of the casters 820 may be placed in the opposite direction.

The upper fitting part 832 of the cover 830 of the skateboard according to the embodiment of the present invention is in reverse shape to the concavo-convex shape of the connecting part 900 of the skateboard to get the connecting part 900 of the skateboard fit into the upper fitting part 832. This structure prevents the auxiliary caster module 900 from being coupled with the connecting part 900 of the skateboard in the opposition direction and it may couple the auxiliary caster module 800 with connecting part 900 of the skateboard tightly.

When the connecting part 900 is coupled with the lower fitting part 840 and the upper fitting part 832, a nut 834 is inserted into the hole 836 of the cover 830 and is fastened with the coupling means 842 and the assembly of the auxiliary caster module 800 with the connecting part 900 of the skateboard is finished.

When the auxiliary caster module 800 is assembled to the connecting part 900 of the skateboard, the each bottom of the front board (FB) and the rear board (RB) is touched on the each surface of the cushion parts 805 of the projected stoppers 810.

Since the cushion part 805 is made of soft rubber or silicon, the cushion part 805 is easy to be pressed down as much as its height.

Fig. 6 is a partially enlarged perspective view of the projected stopper of the auxiliary caster module according to the present invention.

As shown in Fig. 6, the enlarged view of the composition of the projected stopper 810 and the cushion part 805 is easily illustrated and the stoppers 810 are projected and installed two by two at the front and the rear of the underbody 840 of the auxiliary caster module 800 respectively.

Referring to Fig. 7, the connecting part 900 of the skateboard which is in concavo-convex shape according to the embodiment of the present invention is fit to the lower fitting part 844 of the underbody 840 of the skateboard according to the present invention which is in reverse shape to the connecting part 900. By this reason it may not be assembled in reverse.

The upper fitting part 832 of the cover 830 is in the same concave-convex shape as the lower fitting part 844 of the skateboard according to the embodiment of the present invention

Fig. 8 is a side view of the skateboard with an auxiliary caster module installed according to the present invention. Fig. 9 is a partially enlarged view of C in Fig. 8.

Referring to Fig. 8 and Fig. 9, the each bottom of the front board (FB) and the rear board (RB) is in touch with the each top of each projected stopper 810.

Fig. 10 is a partially enlarged view of an internal structure of a modified projected stopper according to the modification of the present invention.

As shown in Fig. 10, in the modified embodiment of the present invention, a groove 812 is installed inside the each projected stopper 810 and a coil spring 814 is installed in it. The cushion part 805 is connected with the top of the coil spring 814.

In the modified embodiment of the present invention, as the front board (FB) or the rear board (RB) is twisted, the cushion part 805 is pressed, and the cushion part 805 under which the coil spring 814 being installed is pushed into the groove 812 of the projected stopper 810.

In the modified embodiment of the present invention, the cushion part 805 may not be necessarily soft rubber or silicon. It may be made of plastic.

Fig. 11 is a bottom view of the skateboard with an auxiliary caster module installed according to the present invention.

Referring to Fig. 11, there are four projected stoppers 810 in total which are placed two by two at the front and the rear of the underbody 840 of the auxiliary caster module according to the embodiment of the present invention.

The bottoms of the front board (FB) and rear board (RB) are located right above the four projected stopper 810 of the present invention.

While specific embodiments of the invention have been described, it will be obvious to those skilled in the art that the invention may be modified in various forms without departing from the scope of the invention and the modifications belongs to the scope of the appended claims.

Claims

A skateboard with an auxiliary caster module comprising:

a front board;

a rear board; and

said auxiliary caster module which being installed on a connecting part which connecting said front board and said rear board

wherein said auxiliary caster module including projected stoppers being installed two by two at front and rear .
The skateboard with an auxiliary caster module according to claim 1, wherein on top of said projected stoppers 810, a cushion part being installed on respectively.
The skateboard with an auxiliary caster module according to claim 1, wherein in said each projected stopper a groove is installed and a coil spring is installed in said each groove, and a cushion part is installed on top of said coil spring.
The skateboard with an auxiliary caster module according to claim 1, wherein said connecting part is in concavo-convex shape.