WO2002089933A2 - Detachable type roller skate capable of preventing backward motion - Google Patents

Abstract

The present invention relates to a detachable type roller skate capable of preventing a backward motion which includes a front plate unit in which a slanted female threaded portion is formed in a plate-shaped upper center portion, a rear member in which a female threaded portion corresponding to the male threaded portion is formed in one side, a left and right fixing plate member in which a male threaded portion corresponding to the female threaded portion of the front member is formed in one side, a front roller portion in which a front roller is installed in both sides of a rotary shaft having a plurality of male threaded portions each having a certain slanted angle, a rear roller portion in which a rear roller is installed at both sides of the rotary shaft having a plurality of male threaded portions each slanted at a certain angle, a brake roller formed in the same circular shape as the front and rear rollers, in which a rubber braking portion is attached on an outer circumferential surface, an elongated hole is formed in the center portion of the side plate at a certain slanted angle, a shaft is inserted into the elongated hole, and the brake roller is installed just behind the rear roller for thereby providing a braking force; and a binding band formed of binding clips and having an adjustable length.

Description

DETACHABLE TYPE ROLLER SKATE CAPABLE OF PREVENTING BACKWARD

MOTION

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a detachable type roller skate capable of

preventing a backward motion, and in particular to a detachable roller skate

capable of preventing a backward motion in which it is possible to prevent a

backward motion in a slanted surface and freely adjust a lengthwise and widthwise

size, so that it is possible to stably and economically use a roller skate irrespective

of a foot size of a user by providing a plurality of rollers and brake rollers in a lower

portion of a body of a roller skate and size-adjustable left and right plate members,

front and rear plate units and a binding band, whereby a detachable type skate

capable of preventing a backward motion is well adapted as an exercise

instrument as well as a short-distance transportation unit.

2. Description of the Background Art

Generally, a roller skate is widely used as a leisure and sports gear for

kids and adults by installing a plurality of rollers in the lower surfaces of certain

shaped shoes, so that it operates on the ground for thereby obtaining a certain exercise effect.

Recently, the above roller skate is designed to be used for obtaining a

simple exercise effect and to be used as a leisure and sports gear as well as a

short-distance moving unit.

Namely, a user stores the roller skate in a bag and uses the same if

necessary.

However, the above conventional roller skate has a disadvantage in that it

takes a long time for changing the shoes with a roller skate for use. So, it is very

inconvenient for use.

Therefore, in order to overcome the above-described problems, a

detachable roller skate is disclosed in the Korean Patent Laid-open No. 2001-

0009771. The above conventional detachable roller skate is capable of directly

putting on the roller skate under the shoes for thereby decreasing a time required

for changing the roller skate with the shoes and enhancing a convenience. The

above conventional detachable roller skate includes a body having a plurality of

rollers and brakes, a semi-circular front portion, a rear portion capable of

supporting a rear end of a foot, leather stripes for binding the shoes and a support

member for protecting an ankle of the user.

However, the above detachable roller skate is fabricated based on a

previously determined size matching with the size of the foot of the user. Therefore,

if the conventional detachable roller skate is used for a user having a different foot size, a shoe wearing feel is bad. In addition, in the case that other users use the

conventional detachable roller skate having a different foot size, it is impossible to

use the same. Therefore, the user must buy his own roller skate for thereby

increasing the cost.

In addition, since the conventional roller skate does not have a function for

preventing a reverse rotation of the rollers, it is possible to use on the flat ground,

but it is impossible to use on the slanted ground. In this case, when a user runs on

the slanted ground and tries by applying a certain force to his grounded roller

skate, the user may be backwardly slipped, so that it is impossible to run in the

forward direction on the slanted ground. When the user is slipped down, the user

may be damaged.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a detachable

type roller skate capable of preventing a backward motion which is capable of

preventing a backward motion on a slanted ground surface and freely adjusting

the lengthwise and widthwise sizes, so that a user uses a roller skate irrespective

of the foot size of a user for thereby implementing an economic use of the roller

skate.

To achieve the above objects, there is provided a detachable type roller

skate capable of preventing a backward motion which includes a front plate unit in which a slanted female threaded portion is formed in a plate-shaped upper center

portion, a male threaded portion having an elongated hole is formed in one side,

and an insertion groove is formed at both side surfaces; a rear member in which a

female threaded portion corresponding to the male threaded portion is formed in

one side, and a side wall having a plurality of insertion grooves is formed in an

outer circumferential surface; a left and right fixing plate member in which a male

threaded portion corresponding to the female threaded portion of the front member

is formed in one side, and a side wall having an engaging groove is formed in the

other side; a front roller portion in which a front roller is installed in both sides of a

rotary shaft having a plurality of male threaded portions each having a certain

slanted angle, a female threaded portion corresponding to a male threaded portion

of the rotary shaft is formed in one side, an insertion portion having an insertion

hole is formed in the other side, and a stopper having a certain length is formed on

the upper portion of the rotary shaft, and the front roller portion is installed below

the front plate unit; a rear roller portion in which a rear roller is installed at both

sides of the rotary shaft having a plurality of male threaded portions each slanted

at a certain angle, a female threaded portion corresponding to a male threaded

portion of the rotary shaft is formed in one side, an insertion portion having an

insertion hole is formed in the other side, and a stopper is installed in an upper

portion of the rotary shaft, and the rear roller portion is installed below the rear

plate unit; a brake roller formed in the same circular shape as the front and rear rollers, in which a rubber braking portion is attached on an outer circumferential

surface, an elongated hole is formed in the center portion of the side plate at a

certain slanted angle, a shaft is inserted into the elongated hole, and the brake

roller is installed just behind the rear roller for thereby providing a braking force;

and a binding band formed of binding clips and having an adjustable length.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become better understood with reference to the

accompanying drawings which are given only by way of illustration and thus are

not limitative of the present invention, wherein;

Figure 1 is a disassembled perspective view illustrating a detachable type

roller skate capable of preventing a backward motion according to the present

invention;

Figure 2 is a perspective view illustrating a detachable type roller skate

capable of preventing a backward motion according to the present invention;

Figure 3 is a cross-sectional view illustrating a detachable type roller skate

capable of preventing a backward motion according to the present invention;

Figures 4 and 5 are side views illustrating an operation state of a brake

roller according to the present invention;

Figures 6 and 7 are front cross-sectional views illustrating an operation

state of a detachable type roller skate capable of preventing a backward motion according to the present invention;

Figures 8 and 9 are views illustrating horizontal cross-sectional views

illustrating an operation state of a detachable type roller skate capable of

preventing a backward motion according to the present invention; and

Figure 10 is a perspective view illustrating a state of use of a detachable

type roller skate capable of preventing a backward motion according to the present

invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The preferred embodiments of the present invention will be explained with

reference to the accompany drawings.

The detachable roller skate 1 capable of preventing a backward motion

according to the present invention includes:

a front plate unit 2 in which a female threaded portion 10 has a protrusion

200 having an engaging hole 204 in a plate-shaped upper surface center portion

and formed of a plurality of threaded portions each formed at a certain slanted

angle and is formed in left and right portions, respectively, in an opposite direction,

and a male threaded portion 14 has an insertion hole 5 and is formed in one side,

and an insertion groove 8 is formed a both side surfaces;

a rear plate unit 16 in which a female threaded portion 11 has a protrusion

202 formed of an engaging hole 204 in a plate-shaped upper center portion and is _ _ _

formed of a plurality of threaded portions each formed at a certain slanted angle in

a left and right portions in an opposite direction, and an elongated hole 24 is

formed in an upper surface, and a female threaded portion 22 is formed to

correspond with the male threaded portion 14 of the front plate unit 2, and an

insertion groove 9 is formed at both side surfaces;

front side left and right fixing plate members 26 and 29 in which an

elongated hole 4 is formed, a male threaded portion 32 corresponding to the

female threaded portion 10 of the front plate unit 2 is formed in a lower surface of

one side, and a side wall 28 having an engaging groove 30 at the other side is

formed;

rear side left and right fixing plate members 21 and 23 in which an

elongated hole 7 is formed, and a male threaded portion 27 matching with the

female threaded portion 11 of the rear plate unit 16 is formed is a lower surface of

one side, and a side wall 18 having an engaging groove 20 is formed in the other

side;

a front roller portion 34 installed in a lower portion of the front plate unit 2,

in which front rollers 36 are installed at both sides of a rotary shaft 38 having a

plurality of male threaded portions 40 each formed at a certain slanted angle, and

an insertion portion 46 includes a female threaded portion 44 corresponding with

the male threaded portion 40 of the rotary shaft 38 in one side, and an insertion

protrusion 48 formed in the other side, and a front stopper 42 is formed in an upper portion of the rotary shaft 38;

a rear roller portion 70 installed in a lower portion of the rear plate unit 16,

in which rear rollers 76 are installed at both sides of a rotary shaft 74 having a

plurality of male threaded portions 78 each formed at a certain slanted angle, and

an insertion portion 82 is formed in which a male threaded portion 72

corresponding to a male threaded portion 78 of the rotary shaft 74 is formed in one

side, and an insertion protrusion 80 is formed in the other side, and a rear stopper

84 is formed in an upper portion of the rotary shaft 74;

a brake roller 50 installed just behind the rear rollers 70, in which a rubber

braking member 56 is formed in the same circular shape as the front and rear

rollers 34 and 70 and is formed in an outer circumferential surface of the same,

and an elongated hole 52 is formed in the center portion of the side plate 3 at a

certain slanted angle, and a shaft 54 is inserted into the elongated hole 52, for

thereby providing a certain braking force; and

a binding band 60 in which male and female Velcro fasteners 58 and 62 are

installed in both ends, and the length of the same is adjustable.

The embodiments of the present invention will be explained in detail with

reference to the accompanying drawings.

Figure 1 is a disassembled perspective view illustrating a detachable type

roller skate capable of preventing a backward motion according to the present

invention, Figure 2 is a perspective view illustrating a detachable type roller skate capable of preventing a backward motion according to the present invention,

Figure 3 is a cross-sectional view illustrating a detachable type roller skate

capable of preventing a backward motion according to the present invention,

Figures 4 and 5 are side views illustrating an operation state of a brake roller

according to the present invention, Figures 6 and 7 are front cross-sectional views

illustrating an operation state of a detachable type roller skate capable of

preventing a backward motion according to the present invention, Figures 8 and 9

are views illustrating horizontal cross-sectional views illustrating an operation state

of a detachable type roller skate capable of preventing a backward motion

according to the present invention, and Figure 10 is a perspective view illustrating

a state of use of a detachable type roller skate capable of preventing a backward

motion according to the present invention.

As shown in Figure 1 , the front plate unit 2 is positioned at a front end of a

shoe 100 and is formed in a certain plate shape and includes a certain thickness.

A protrusion 200 having an engaging hole 204 is formed in the center portion of

the upper surface of the same. The female threaded portions 10 are formed in the

left and right sides and are opposite each other in such a manner that the slanted

surface 12 having a certain angle is formed in an outer direction. The male

threaded portion 14 includes an elongated hole 4 formed in the center portion and

having a certain length and is integrally formed in the low surface of the rear

portion. An insertion groove 8 is formed at both side surfaces. An engaging hole 102 having a lower portion to which the insertion portion 46 of the front stopper 42

is engaged, is formed in one side, and the front roller engaging portion 104 having

the engaging hole 103 into which the engaging shaft 35 of the front roller 36 is

inserted, is formed in the other side.

At this time, as shown in Figure 1 , the female threaded portion 10 and the

male threaded portion 14 are formed in multiple numbers in such a manner that

one side of each of the same has a slanted surface 12 and the other side of each

of the same has a vertical surface.

The rear plate unit 16 is positioned in the rear portion of the bottom of the

shoe 100 and is formed of a plate shape and includes a certain thickness. The

rear female threaded portions 11 are formed in the left and right sides in an

opposite direction in such a manner that the surface slanted at a certain angle is

formed in an outer direction. The front female threaded portion 22 includes a

plurality of threaded portions each slanted at a certain angle for corresponding

with the male threaded portion 14 of the front plate unit 2 and is formed in the front

upper surface. An insertion groove 9 is formed at both side surfaces. An engaging

hole 112 into which the insertion portion 82 of the rear stopper 84 is inserted, is

formed at both sides of the same. The rear roller engaging portion 114 having the

engaging hole 113 into which the engaging shaft 75 of the rear roller 76 is inserted,

is formed in the other side.

At this time, the female threaded portion 22 of the rear plate unit 16 is positioned below the male threaded portion 14 of the front plate unit 2, and the

insertion hole 5 and the elongated hole 24 are arranged, and the bolt 11 and the

nut 13 are engaged using the engaging member 15, so that the front plate unit 2

and the rear plate unit 16 are fixed at a certain length.

The front side left and right fixing plate members 26 and 29 are formed in

the plate shape threaded with the front plate unit 2. An elongated hole 4 is formed,

and the male threaded portion 32 corresponding to the female threaded portion 10

of the front plate unit 2 is formed in a lower surface of one side. A side wall 28

having an engaging groove 30 formed in a lengthy direction is formed in the other

side.

The rear side left and right fixing members 21 and 23 are formed in the

plate shape threaded with the rear plate unit 16. An elongated hole 7 is formed,

and the male threaded portion 27 corresponding to the female threaded portion 11

of the rear plate unit 16 is formed in a lower surface of one side, and a side wall 18

having an engaging groove 20 formed in a lengthy direction is formed in the other

side.

In the front roller portion 34, the front rollers 36 are installed at both sides of

the rotary shaft 38 in which a plurality of male threaded portions 40 each having a

certain slanted angle are formed. The female threaded portion 44 corresponding to

'the male threaded portion 40 of the rotary shaft 38 are formed in one side, and the

insertion portion 46 having the insertion protrusion 48 is formed in the other side. A front stopper 42 having a certain length is installed in the upper portion of the

rotary shaft 38. The front roller portion 34 is installed below the front plate unit 2.

In addition, the bearing 208 is installed in a side surface of the front roller 36,

and an engaging shaft 35 is protruded from the center portion of the same.

At this time, as shown in Figure 1 , the male threaded portion 40 of the

rotary shaft 38 is formed in such a manner that the slanted surfaces of the

threaded portions are formed in the forward direction. The female threaded portion

44 of the front stopper 42 is positioned on the upper portion of the same. When the

roller skate 1 runs in a forward direction, the normal rotation of the front rollers 34

are not affected. When the roller skate 1 runs in a backward direction, the female

threaded portion 44 of the front stopper 42 is engaged with the male threaded

portion 40 of the rotary shaft 38 for thereby generating a braking effect.

In the rear roller portion 70, the rear roller 76 is installed at both sides of the

rotary shaft 74 in which a plurality of male threaded portions 78 each having a

certain threaded angle are formed. The female threaded portion 72 corresponding

to the male threaded portion 78 of the rotary shaft 74 is formed in one side, and

the insertion portion 82 having an insertion protrusion 80 is formed in the other

side. A rear stopper 84 having a certain length is formed in the upper portion of the

rotary shaft 74. The rear roller portion 70 is installed below the rear plate unit 16.

At this time, the bearing 208 is installed in a side surface of the rear roller

76. An engaging shaft 75 is protruded from the center portion of the same. Therefore, the reverse direction rotation of the rear roller 76 is prevented in the

same manner as the front stopper 42.

The brake roller 50 is formed in the same circular shape as the front and

rear rollers 36 and 76. A braking member 56 formed of a rubber material is formed

in an outer circumferential surface. A bearing 208 is installed in a side surface. In

addition, an engaging shaft 54 is installed. The brake roller 50 is inserted into the

elongated hole 52 which is formed in one side of the side plate 3 at a certain

slanted angle and is installed just behind the rear roller 76 for thereby generating a

certain braking force.

At this time, the elongated hole 52 is formed from the front upper portion to

the rear lower portion at a certain slanted angle, and a shaft 54 is installed in the

center portion.

As shown in Figures 4 and 5, when braking the roller skate 1, the user

applies a certain force to the heel of the foot for thereby pressing the rear plate

member 16, so that the brake roller 50 is moved to the front upper portion along

the elongated hole 52 and comes close with the rear roller 76 which is installed in

front of the same, whereby the braking member 56 comes close to the rear roller

76 for thereby generating a braking force.

In the binding band 60, the male and female Velcro fasteners 58 and 62 are

installed at the end portions of each of both sides for thereby adjusting the length.

The above method is well known in the art. In the drawings, reference numeral 210 represents a screw, and 120

represents a safety support rod which operates as a support member for

preventing a user's fall down due to an unbalance.

The operation of the present invention will be explained with reference to

the accompanying drawings.

In order to match with the size of the user's shoe 100, the female threaded

portion 22 of the rear plate unit 16 is placed below the male threaded portion 14 of

the front plate unit 2 in which the binding band 60 is engaged, and then the

elongated holes 4 and 24 are arranged and engaged using the engaging member

15 of the bolt 11 and the nut 13. Thereafter, the front plate unit 2 and the rear plate

unit 16 are fixed by a certain length.

The front and rear side left and right fixing plate members 26, 29, 21 and 23

are placed on the upper surfaces of the fixed rear plate unit 16 and front plate unit

2, and the female threaded portions 10 and 11 and the male threaded portions 32

and 27 are thread-engaged for thereby adjusting the size and fixing the same. At

this time, the female threaded portions 10 and 11 are formed in such a manner

that the slanted surface 12 is formed in an outer direction, and the left and right

sides of the same opposite each other. Therefore, it is easy to insert the front and

rear side left and right fixing plate members 26, 29, 21 and 23 for thereby

preventing an easier escape of the same.

The shoes 100 are placed on the upper portion of the front and rear plate units 16 and 2 of which the sizes are adjusted. Thereafter, the length of the binding

band 60 inserted through the insertion grooves 8 and 9 and the engaging grooves

20 and 30 is adjusted. In this state, when using on the slanted ground surface or

on the steps, the user applies a certain force to the heel of the grounded foot for

forwardly walking. At this time, when applying a certain force to the heel of the

grounded foot, the reverse rotation of the roller is prevented by the front and rear

stoppers 42 and 84 thread-engaged with the rotary shafts 38 and 74 of the front

roller portion 34 and the rear roller portion 70 for thereby decreasing a load applied

to the user's feet.

In addition, when the user wants to stop walking, the user applies a certain

force to the heel of the user's foot and presses the rear plate unit 16, so that the

brake 50 is moved to the front upper portion along the elongated hole 52 and

comes close to the rear roller 76 which is installed in front of the same, for thereby

generating a certain braking force by the braking member 56.

Therefore, in the present invention, it is possible to freely adjust the

lengthwise and widthwise sizes of the roller skate, so that the user uses the roller

skate irrespective of the foot size. In addition, many people may use one roller

skate irrespective of the foot size. In addition, when the user uses the roller skate

on the slanted ground surface or the steps, since the backward motion of the roller

skate is prevented, it is safe and convenient.

As described above, the detachable roller skate capable of preventing a backward motion according to the present invention may be used as an exercise

gear as well as a short-distance transportation unit by providing a plurality of

rollers and a plurality of brake rollers in the lower portion of the body of the roller

skate, and the size adjustable left and right plate members and front and rear plate

units and binding band. Therefore, the users may economically use the roller skate

irrespective of the user's feet size by freely adjusting the lengthwise and widthwise

sizes of the roller skate. In addition, many people may use one roller skate

irrespective of the user's feet sizes. When the users use the roller skate on the

slanted ground surface or the steps, the backward motion of the roller skate is

prevented, it is safe and convenient to use the roller skate.

As the present invention may be embodied in several forms without

departing from the spirit or essential characteristics thereof, it should also be

understood that the above-described embodiments are not limited by any of the

details of the foregoing description, unless otherwise specified, but rather should

be construed broadly within its spirit and scope as defined in the appended

claims, and therefore all changes and modifications that fall within the meets

and bounds of the claims, or equivalences of such meets and bounds are

therefore intended to be embraced by the appended claims.

Claims

What is claimed is:

1. A detachable type roller skate capable of preventing a backward motion,

comprising:

a front plate unit formed in a plate shape and having a certain thickness, in

which a protrusion having an engaging hole therein is formed in an upper center

portion, and a female threaded portion is formed opposite each other at left and

right sides in such a manner that a slanted surface is formed at a certain angle in

an outer direction, and a male threaded portion having an elongated hole of a

certain length and slanted at a certain angle is formed in a center portion, and an

insertion groove is formed at both side surfaces of the same, and an engaging

hole having a lower portion to which an insertion portion of a front stopper is

engaged is formed in one side, and a front roller engaging portion having an

engaging hole into which an engaging shaft of the front roller is inserted is formed

in the other side;

a rear plate unit formed in a certain plate shape and having a certain

thickness, in which a protrusion having an engaging hole is formed in an upper

surface of the same, and a rear female threaded portion is formed opposite each

other in left and right sides in such a manner that a slanted surface is formed at a

certain angle in an outer direction, and a front female threaded portion having an

elongated hole in a center portion and formed of slanted threaded portions each

having a certain slanted angle for corresponding with a male threaded portion of the front plate unit is formed in a front upper surface, and an insertion groove is

formed at both side surfaces, and an engaging hole having a lower portion to

which an insertion portion of the rear stopper is engaged, is formed at both sides,

and a rear roller engaging portion having an engaging hole into which an engaging

shaft of the rear roller is inserted is formed in the other side;

an engaging means in which a female threaded portion of the rear plate

unit is positioned in a lower portion of the male threaded portion of the front plate

unit, and the elongated holes are arranged and engaged using an engaging

means of the bolt and nut, and the front plate unit and the rear plate unit are fixed

by a certain length;

front side left and right fixing plate members formed in a plate shape and

being thread-engaged with the front plate unit, in which an elongated hole is

formed, and a male threaded portion corresponding to the female threaded portion

of the front plate unit is formed in a lower surface of one side, and a side wall

having an elongated engaging groove is formed in the other side;

rear side left and right fixing plate members formed in a plate shape and

being thread-engaged with the rear plat unit, in which an elongated hole is formed,

and a male threaded portion corresponding to the female threaded portion of the

rear plate unit is formed in a lower surface of one side, and a side wall having an

elongated engaging groove is formed in the other side;

a front roller portion installed at both sides of a rotary shaft having a plurality of male threaded portions each slanted at a certain angle, in which a

bearing is installed in a side surface of the same, and a front roller having an

engaging shaft is formed in the center portion, and a female threaded portion

corresponding to the male threaded portion of the rotary shaft is formed in on side,

and an insertion portion having an insertion protrusion is formed in the other side,

and a front stopper having a certain length is formed on an upper portion of the

rotary shaft, and said front roller being installed below the front plate unit;

a rear roller portion installed at both sides of the rotary shaft having a

plurality of male threaded portions each slanted at a certain angle, in which a

bearing is installed in a side surface of the same, and a rear roller having an

engaging shaft is installed in the center portion, and a female threaded portion

corresponding to the male threaded portion of the rotary shaft is formed in one

side, and an insertion portion having an insertion protrusion is formed on the other

side, and a rear stopper is formed on an upper portion of the rotary shaft, and said

rear roller portion being installed below the rear plate unit;

a brake roller formed in the same circular shape as the front and rear

rollers, in which a rubber braking member is installed in an outer circumferential

surface, and an elongated hole is formed in the center portion of the side plate at a

certain slanted angle, and a shaft is inserted into the elongated hole, and said

brake roller being installed just behind the rear roller; and

a binding band having female and male Velcro fasteners installed at both end portions of the same, a length of the binding band being adjustable.