KR101574006B1

KR101574006B1 - Attachable inline skate

Info

Publication number: KR101574006B1
Application number: KR1020140020162A
Authority: KR
Inventors: 김광수
Original assignee: 김광수
Priority date: 2014-02-21
Filing date: 2014-02-21
Publication date: 2015-12-02
Also published as: CN105980022A; KR20150098829A; WO2015126170A1

Abstract

According to an embodiment of the present invention, a user applies a sequential load to a rear foot portion of a foot plate and includes a brake mode, a walking mode in which the wheel is allowed to walk while suppressing the rotation of the wheel in the brake mode, And a plurality of wheels are rotatably attached to the wheel frame, wherein the wheel frame includes a conversion projection, and the hinge shaft is hinge-coupled to the wheel frame by a hinge shaft. The detachable inline skate according to claim 1, An ankle fixing part foldably attached to a rear surface of the footrest; and a control unit for controlling the rotation of the footrest to suppress the rotation of the wheel in the last one of the wheels to perform the brake mode A brake piece attached to a lower portion of the foot plate to provide an elastic force such that the brake piece is spaced apart from the wheel A sliding module having an elastic means, a mountain-shaped protrusion, and a plurality of walking mode protrusions to slide in the wheel frame according to the rotation of the footrest; and a mode conversion pin according to sliding of the sliding module And a mode changing means for moving the wheel frame in a sliding groove of the wheel frame.

Description

Removable inline skate {ATTACHABLE INLINE SKATE}

The present invention relates to a detachable inline skate which is simple in construction and assembly.

As is well known, inline skates are equipment for allowing wheels to be placed on the bottom of a shoe and for running on the ground by arranging the wheels in a row. The inline skates include fitness for fitness training, racing for racing, There are various kinds according to the purpose of use, such as for hockey for hockey, downhill for raising and lowering slope.

However, since such inline skates are difficult to walk when worn, they are worn only during skating, so that they must be transported using a separate carrying bag such as a sack in order to enjoy the skating, resulting in a great inconvenience.

Accordingly, various inline skates have been developed to solve the inconvenience of inline skates and the like. Especially, since the inline skates are easily supported by wheels capable of freely rotating, it is easy to cause an accident. Therefore, there is a need to develop a product that can secure the safety of use.

Conventional inline skates in accordance with this need have a problem in that it is difficult to walk when worn, and therefore, they are transported using a separate bag before use or after use, thereby causing discomfort.

In addition, the conventional inline skates cause serious injury when the attitude is tilted and fall, and it is difficult to walk by the free rotation of the wheel when worn. Especially, when a person tries to walk on stairs or a sloping place, I had an issue to make.

Thus, the detachable inline skates of the following patent documents by the present applicant have been able to prevent a safety accident by preventing the vehicle from falling back, and by allowing the rotation of the wheel to be inhibited when walking on a stairway or other places, safe walking is possible.

However, the conventional detachable inline skater disclosed in Patent Document 1 is inconvenient to carry and use due to elongation shrinkage of the expansion piece, and it is inconvenient to operate the pressure knob in the walking mode. The detachable inline skater of Patent Document 2 also has a problem It is difficult to adjust the height during the conversion and the assembly is complicated due to the complicated configuration.

Korean Registered Patent No. 10-0967653 (registered on June 25, 2010) Korean Registered Patent No. 10-1320349 (Registered November 11, 2013)

It is an object of the present invention to provide a detachable inline skate in which a brake mode and a walking mode are converted to simplify assembly.

According to an aspect of the present invention, there is provided a braking mode for a vehicle, the braking mode including a braking mode in which the rotation of the wheel is suppressed, And a switching mechanism for switching the operating mode to the traveling mode in the walking mode, the detachable inline skate comprising: a wheel frame having a sliding groove formed therein and having a plurality of wheels rotatably attached thereto; An ankle fixing part hinged to the wheel frame by a shaft and hinged by a user and seated by a user; an ankle fixing part foldably attached to a rear surface of the footrest; A brake piece attached to a lower portion of the footrest so as to perform the brake mode while suppressing rotation of the brake pedal, An elastic means for providing an elastic force to be spaced from the wheel; a sliding module having an elongated protrusion and a plurality of walking mode protrusions to slide in the wheel frame according to the rotation of the footrest; And a mode conversion means for moving the mode conversion pin in the sliding groove of the wheel frame according to the sliding of the wheel frame.

Wherein the wheel frame comprises a pair of frame bodies each having a shape corresponding to each other, wherein the sliding groove formed in each of the frame bodies has a vertical portion and a horizontal portion in an "L" shape, A bracket for receiving a mode release spring, a bracket for receiving a hinge shaft, a sliding piece and an escape preventing piece formed so that the sliding module can slide without being separated from each other, It is possible to provide a removable inline skate including a protruding bar.

The sliding module includes a sliding member, a mountain-shaped projection formed to abut the conversion projection of the foot plate, a mode conversion pin accommodating portion formed on a side surface subsequent to the mountain-shaped projection, and a first spring and a second spring And a pair of walking mode protrusions formed on the lower surface of the sliding member so as to be respectively positioned at the rear of the wheel, wherein the mode conversion pin is inserted into the mode conversion pin accommodating portion, May be provided with a removable inline skate which is exposed to the sliding groove of the wheel frame.

The conversion projection of the foot plate and the mountain-shaped protrusions of the sliding member each have a vertical surface and an inclined surface, and can face each other, and the lower surface of the sliding member is recessed so as not to interfere with the upper portion of the wheel .

Wherein the first spring and the second spring are biased toward the last wheel, the first spring is a pair, the elasticity thereof is smaller than the elasticity of the second spring, each one end is attached to the mode conversion pin, Wherein the first spring is fixed to the spring receiving portion of the sliding member and presses the mode conversion pin to the original position, the second spring is located between the first springs, one end thereof is fixed to the spring receiving portion, And a detachable inline skate attached to the protruding bar to press the sliding member to an original position.

Wherein the mode conversion module comprises a pair of mode conversion members that are screwed onto the foot plate, each of the mode conversion members includes a screw coupling portion and a mode conversion portion attached vertically to the screw coupling portion, Wherein the mode conversion member includes a mode conversion member and a guide piece attached to the inside of the mode conversion unit, wherein the guide member is composed of a vertical portion and an inclined portion, and in the running mode, And the elasticity of the first spring is applied to the detachable inline skate by pressing the inclined portion.

The mode conversion pin positioned at the contact point between the vertical part and the inclined part is moved to the boundary between the vertical part and the horizontal part of the sliding groove in the brake mode and elasticity is applied to the second spring, And a detachable inline skate positioned adjacent to the mode conversion pin immediately below the shifted mode conversion pin.

When the conversion projection of the footrest further rotates in the clockwise direction in the brake mode, the mountain-shaped projection of the sliding member and the conversion projection are released from the state in which their vertical surfaces are in contact with each other, and the first and second The sliding member is slid forward by a spring so that the inclined surfaces of the conversion protrusions and the mountain-shaped protrusions come into contact with each other, and the walking mode projections come into contact with the wheels, respectively.

Wherein the mode conversion pin moved at the boundary between the vertical part and the horizontal part of the sliding groove is supported on a vertical plane of the sliding groove to prevent the flow of the mode conversion pin, It is possible to provide a removable inline skate which is positioned adjacent to an upper portion of the mode conversion pin supported on the vertical surface of the sliding groove.

The embodiments of the present invention provide a structure in which a user can easily assemble and carry while being easy to carry and wear, and a user applies a sequential load to a rear foot portion of a foot plate. The brake mode includes a brake mode, It is possible to smoothly perform the switching between the walking mode capable of suppressing the rotation of the walking mode and the operation mode in the traveling mode in the walking mode.

1 is a perspective view showing a removable inline skate according to an embodiment of the present invention,
Fig. 2 is an exploded perspective view showing in detail the structure of the wheel frame of the inline skate of Fig. 1,
Fig. 3 is an exploded perspective view showing a state of engagement between a base plate and a wheel frame of the inline skate of Fig. 1,
Fig. 4 is a schematic view showing a running mode state of the inline skate of Fig. 1,
FIG. 5 is a schematic diagram showing a state in which the mode is changed from the traveling mode state to the brake mode in FIG. 4,
Fig. 6 is a schematic diagram showing a state in which the mode is changed from the break mode to the walking mode in Fig. 5; Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the following description, well-known functions or constructions are not described in detail since they may obscure the subject matter of the present invention.

FIG. 1 is an exploded perspective view showing a detachable inline skate according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing in detail the structure of a wheel frame of the inline skate of FIG. 1, Fig. 5 is an exploded perspective view showing a combined state of frames; Fig.

1 to 3, the detachable inline skate of the present invention is characterized in that the wearable inline skate can be used in a state in which the wearer wears the shoes, but it goes without saying that it is possible to wear the inline skate without wearing shoes.

Since the inline skate of the present invention can be worn by a user wearing his or her foot, the footrest 200 on which the shoe or foot is seated, the ankle fixing part 300 foldably attached to the back surface of the footrest 200, A wheel frame 400 attached to the lower portion of the foot plate 200 to which the wheels 111a to 111c are rotatably attached and the wheel 111 to which the wheel 111 is pushed down by the downward pressing by the user's heel, A sliding module 500 housed in the wheel frame 400 to perform a brake mode and a second side down pressing by a user's heel in a brake mode so as to perform a walking mode, And is returned to the traveling mode by the third downward pressure by the user's heel in the walking mode.

The wheel frame 400 may be provided to be arranged in a row with a plurality of wheels, in the present embodiment, three wheels 111a to 111c, for driving. The wheels 111a to 111c may be provided with unidirectional bearings on the respective axes of the wheels so as to rotate only in the forward direction when traveling, Is prevented.

Referring to FIGS. 1 and 4, the foot plate 200 of the removable inline skate of the present invention has a substantially foot shape, and a plurality of protrusions may be formed on the upper surface 202 to prevent slippage of shoes.

A screw fixing hole 206 is formed at the center of the heel so as to fix the wheel frame 400. An ankle fixing part 300 is attached to the heel part of the heel so that the shoe is separated from the foot plate 200 The rear leg support portion 208 is formed. A stop member 210 for preventing excessive rotation of the ankle fixing part 300 may be attached to the hind-

An insertion portion 222 is inserted in the rear of the lower surface 220 of the foot plate 200 so that the brake piece 230 is inserted and screwed into the spring insertion groove 222. Inside the spring insertion groove 222, (224) are formed.

The brake piece 230 may be formed so as to have a curvature corresponding to the outer circumferential surface of the wheel 111c by being in close contact with the wheel 111 to suppress the rotation of the wheel 111, A screw groove 232 is formed on an upper surface of the screw groove 232 and is inserted into the insertion portion 222 together with a brake spring 234, And the foot plate 200 is pressed and attached by the brake spring 234 so as to be pressed.

In addition, a hinge protrusion 228 is formed in front of the spring seating groove 224 into which the mode release spring 240 is inserted, into which the hinge shaft 260 is inserted.

A pair of attachment portions 270 formed with two screw grooves 272 are formed in front of the lower surface 220 so that the mode conversion module 600 is attached to the lower surface of the lower surface 220. Conversion protrusions 274 are formed in front of the center .

The ankle fixing part 300 includes a vertical frame 340 that is foldably attached to the rear foot support part 208 of the footrest 200 at a predetermined angle and the inner side of the vertical frame 340 smoothly surrounds the user's ankle The flexible cover 360 can be attached to the vertical frame 340. When the vertical frame 340 is pivoted about the hinge portion 350 to be folded, the volume is small and the movement is easy. On the contrary, if the vertical frame 340 is pivoted for use, The ankle fixing part 300 can be vertically held and used as the projection 342 under the vertical frame 340 contacts the stop member 210 of the ankle fixing part 208. [

In general, when the user wears the inline skates, the feet are pushed outward. To prevent this, when the user lays his / her foot inside, the footrest 200 can naturally assume a stable posture, When the frame 400 is horizontal, that is, when the wheel frame 400 is perpendicular to the ground, the inside can be formed slightly thicker than the outside so as to be tilted inward from the outside, and the vertical frame 340 can be formed outside It can be formed to be inclined outward by a slight angle.

In addition, fastening means 140 for fastening the user's foot and ankle to the foot plate 200 can be attached to the foot plate 200 and the upper portion of the vertical frame 340.

In this embodiment, male and female clips or a bulk tape are used as the fastening means 140, but it goes without saying that they can be variously configured as needed.

2 and 3, the wheel frame 400 includes a pair of frame bodies 420 having shapes corresponding to each other, and the sliding module 500 is accommodated therein.

Each of the frame bodies 420 is formed with a screw hole 426 which is screwed with a plurality of wheel axles 410 to which the three wheels 111 are rotatably inserted, A screw hole 424 into which the hinge shaft 260 inserted into the hinge protrusion 228 of the lower surface 220 of the foot plate 200 is screwed is formed in the middle of the screw holes 424 and 426, And a sliding groove 428 in which the horizontal portions form an "L"

The frame body 420 includes a bracket 430 on which the mode release spring 240 is seated, a bracket 432 on which the hinge shaft 260 is inserted, And the sliding module 434 is provided on the upper part of the sliding piece 434 so that the sliding module 500 can slide between the sliding piece 434 and the separation preventing piece 436 As shown in Fig. Further, the protruding bar 438 may protrude vertically from the upper portion of the release preventing piece 436.

2, the sliding module 500 includes a sliding member 520 and an upper front surface of the sliding member 520 so as to abut the conversion protrusion 274 formed on the front surface of the bottom surface 220 of the foot plate 200. [ And the first and second springs 540 and 542 that provide different elasticity are provided to receive the mode conversion pin accommodating portion 530 formed on the side surface subsequent to the mountain-shaped protrusion 522, And a pair of walking mode protrusions 550 formed on the lower surface of the sliding member 520 so as to be respectively positioned behind the wheels 111a and 111b.

A mode conversion pin 534 is inserted into the mode conversion pin accommodating portion 530, respectively. The mode conversion pin 534 is exposed in the sliding groove 428 of the wheel frame 400. [

The conversion protrusions 274 attached to the lower surface 220 and the mountain-shaped protrusions 522 of the sliding member 520 are protrusions of an equilateral triangle, but each of the vertical surfaces and the inclined surfaces can face each other, So that the upper portion of the upper surface 111b can be received without interference.

The first and second springs 540 and 542 are always pressed toward the last wheel or the third wheel 111c and the elasticity of the first spring 540 is smaller than the elasticity of the second spring 542 .

One end of each of the first springs 540 is attached to the mode conversion pin 534 and the other end of the first spring 540 is fixed to the spring receiving portion 532 of the suliding member 520, To the original position.

The second spring 542 is positioned between the first spring 540 and one end thereof is fixed to the spring receiving portion 532 and the other end is attached to the protruding bar 438, Lt; / RTI >

The mode conversion module 600 includes a pair of mode conversion members 620 which are respectively screwed to the attachment portions 270 of the foot plate 200 in which the two screw grooves 272 are buried, 620 are fixed to the screw coupling portion 622 in a substantially triangular shape by a rectangular coupling portion 622 screwed into the screw groove 272 so that the mode conversion pin 534 is moved vertically And a mode conversion unit 626 and a guide piece 628 are attached to the inner center of the mode conversion unit 630. [ The guide piece 628 is composed of a vertical portion 628a and an inclined portion 628b. In the running mode, the mode conversion pin 534 is positioned at a contact portion between the vertical portion 628a and the inclined portion 628b, As the portion 628b is pressed, the first spring 540 may be slightly elastic.

The operation of the detachable inline skate of the present invention constructed as described above will be described with reference to FIGS. 4 to 6. FIG.

4 shows a traveling mode in which a user travels while wearing a shoe on a foot plate 200. In the case where a brake mode for stopping travel in this state is to be executed, The foot spring 200 and the release spring 234 inserted into the insertion portion 222 of the foot plate 200 are compressed so that the foot plate 200 is pressed against the hinge projections The brake piece 230 screwed to the lower surface 220 of the foot plate 200 is moved in the direction of the center of the hinge axis 260 of the last wheel 111c of the plurality of wheels 111, The upper surface is pressed, so that the running is stopped.

At this time, the conversion projection 274 of the lower surface 220 of the foot plate 200 is slightly rotated in the clockwise direction, and the vertical surfaces of the mountain-shaped projection 522 and the conversion projection 274 of the sliding member 520 are vertically And can be moved adjacent to the vertex.

The mode conversion pin 534 located at the contact point between the vertical portion 628a and the slope portion 628b is raised slightly upward in accordance with the clockwise rotation of the conversion projection 274 to be inserted into the L- And the second spring 542 may be slightly elastic.

At this time, the mode conversion element 626 may be positioned immediately below the shifted mode conversion pin 534.

In this state, when the force applied by the user to the rear dream part is subtracted, the foot plate 200 is rotated about the hinge axis 260 by the elasticity of the compressed mode release spring 240 and the brake spring 234, To release the brake mode, so that all the components are returned to the traveling mode state.

Next, in a state where the user applies a force to the heel of the foot plate 200 to execute the brake mode, when the force is more strongly applied to the heel as shown in Fig. 6, the walking mode is executed.

More specifically, as the compressed mode release spring 240 and the brake spring 234 are further compressed, the foot plate 200 is further lowered around the hinge shaft 260 of the hinge protrusion 228, As a result, as the conversion projection 274 of the lower surface 220 of the foot plate 200 is slightly rotated in the clockwise direction, the conversion projection 274 of the mountain-shaped projection 522 and the lower surface 220 of the sliding module 500 The sliding member 520 of the sliding module 500 is further slid forward by the first and second springs 540 and 542 to which the resilient force is applied, 274 and the mountain-shaped protrusions 522 come into contact with each other and the walking mode protrusions 550 on the front and rear surfaces of the sliding member 520 are brought into contact with the rear surfaces of the wheels 111a, 111b, respectively.

At this time, the mode conversion pin 534 moved toward the L-shaped sliding groove 428 is further moved to the upper side of the sliding groove 428 to be supported on the upper surface to prevent the flow, The gait mode protrusions 550 formed on the first and second wheels 111a and 111b firmly fix the rear surfaces of the wheels 111a and 111b.

The mode conversion element 626 positioned adjacent to the mode conversion pin 534 immediately adjacent to the mode conversion pin 534 can be positioned adjacent to an upper portion of the mode conversion pin 534 supported on the upper surface of the sliding groove 424. [

As described above, since the two wheels 111a and 111b are firmly fixed and the mode conversion pin 534 is prevented from flowing, it is possible to walk safely even at a step or the like.

When the force is applied to the heel portion again strongly in the state of the walking mode, as the conversion projection 274 of the lower surface 220 of the foot plate 200 is rotated in the clockwise direction, The inclined surfaces of the conversion protrusions 274 and the mountain-shaped protrusions 522 are released from each other and the elasticity of the second spring 542 is stronger than the elasticity of the first spring 540, The mode conversion pin 534 is returned to the traveling mode state.

As described above, according to the embodiment of the present invention, it is possible to prevent an accident that occurs due to unstable posture such as a case where the mobile body is easily carried and worn and falls back, and the rotation of the wheel can be suppressed So that it is possible to carry out safe walking and also the operation mode to be switched by pushing the foot plate can be smoothly carried out with a simple configuration of the mode conversion member.

The above description is only one preferred embodiment of the detachable inline skate according to the present invention, and therefore, the present invention is not limited to the above-described embodiment, and therefore, the present invention is not limited to the above- It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. It should be understood that many other modifications and applications are possible within the scope of the basic technical idea of the present invention.

111a-111c: Wheel 200: Footstool
202: upper surface 206: screw fastening hole
208: Hook support 210: Stop member
220: lower surface 222:
224: spring seat 228: hinge protrusion
230: Brake piece 232: Screw groove
234: Brake spring 240: Mode release spring
260: hinge shaft 270: fastening part
272: screw groove 274: conversion projection
300: ankle fixing part 340: vertical frame
342: Projection 350: Hinge section
360: soft cover 400: wheel frame
410: wheel shaft 420: frame body
424, 426: screw hole 428: sliding groove
430, 432: Bracket 434: Sliding piece
436: Departure preventing piece 438: Extruding bar
500: sliding module 520: sliding member
522: a mountain-shaped projection 530: a mode conversion pin accommodating portion
532: spring receiving portion 534: mode conversion pin
540: first spring 542: second spring
550: Walking mode protrusion 600: Mode conversion module
620: Mode conversion member 622: Screw connection part
626: Mode conversion section 628: Guide section
630:

Claims

A user applies a sequential load to the rear foot portion of the foot plate, and the brake mode, the walking mode in which the rotation of the wheel is suppressed in the brake mode, and the operation mode in the running mode in the walking mode are changed In a removable inline skate that can be operated,
A wheel frame in which a plurality of wheels are rotatably attached,
A foot plate hinged to the wheel frame by a hinge shaft, the foot plate having a shoe worn by a user,
An ankle fixing part foldably attached to the back surface of the footrest,
A brake piece attached to a lower portion of the footrest so as to perform the brake mode by restricting the rotation of the wheel of the last one of the wheels by rotation of the footrest,
Elastic means for providing an elastic force such that the brake piece is spaced from the wheel;
A sliding module having a mountain-shaped protrusion and a plurality of walking mode protrusions and sliding in the wheel frame according to the rotation of the foot plate;
And mode conversion means for moving the mode conversion pin in the sliding groove of the wheel frame according to the sliding of the sliding module to perform the conversion of the operating mode,
Wherein the wheel frame comprises a pair of frame bodies having shapes corresponding to each other, the bracket including a bracket on which the mode release spring is seated when the frame body is coupled to each other, and a sliding member And a protruding bar vertically protruding from the upper portion of the release preventing member
Removable inline skates.

The method according to claim 1,
The sliding groove formed in each of the frame bodies has a shape in which the vertical portion and the horizontal portion form an "L"
Removable inline skates.

The method according to claim 1,
The sliding module
A sliding member,
A mountain-shaped protrusion formed so as to abut against the conversion projection of the foot plate,
A mode conversion pin accommodating portion formed on a side surface subsequent to the mountain-shaped protrusion,
A spring receiving portion formed to receive first and second springs which provide different elasticity,
And a pair of walking mode protrusions formed on the lower surface of the sliding member so as to be respectively positioned at the rear of the wheel,
Wherein the mode conversion pin is inserted into the mode conversion pin accommodating portion, and the mode conversion pin is exposed to the sliding groove of the wheel frame
Removable inline skates.

The method of claim 3,
The conversion projection of the foot plate and the mountain-shaped protrusions of the sliding member each have a vertical plane and an inclined plane,
The lower surface of the sliding member is concavely formed so as not to interfere with the upper portion of the wheel
Removable inline skates.

The method of claim 3,
The first and second springs being urged toward the last wheel,
Wherein the first spring is a pair and the elasticity thereof is smaller than the elasticity of the second spring and each one end is attached to the mode conversion pin and the other end is fixed to the spring receiving portion of the sliding member, Pressurize to its original position,
The second spring is located between the first springs, one end of which is fixed to the spring receiving portion and the other end is attached to the protruding bar to press the sliding member to the original position
Removable inline skates.

The method according to claim 1,
The mode conversion module
And a pair of mode conversion members screwed on the foot plate,
Each of the mode conversion members
And a mode converting unit vertically attached to the screw connecting unit and moving the mode converting pin,
And a mode conversion unit and a guide unit attached to the inside of the mode conversion unit,
Wherein the guide pin is composed of a vertical portion and an inclined portion, and in the traveling mode, the mode conversion pin is located at a contact portion between the vertical portion and the inclined portion, and elasticity is applied to the first spring as the inclined portion is pressed
Removable inline skates.

The method according to claim 6,
The mode conversion pin located at the contact point between the vertical part and the inclined part is moved to the boundary between the vertical part and the horizontal part of the sliding groove in the brake mode,
Wherein the mode conversion element is located adjacent to the mode conversion pin immediately below the shifted mode conversion pin
Removable inline skates.

The method of claim 3,
When the conversion projection of the footrest further rotates in the clockwise direction in the brake mode, the mountain-shaped projection of the sliding member and the conversion projection are released from the state in which their vertical surfaces are in contact with each other, and the first and second The sliding member is slid forward by a spring so that the inclined surfaces of the conversion projection and the mountain-shaped projection come into contact with each other,
And each of the walking mode projections abuts against the wheel.

8. The method of claim 7,
The mode conversion pin moved to the boundary between the vertical portion and the horizontal portion of the sliding groove is supported on the vertical surface of the sliding groove to prevent the sliding,
Wherein the mode conversion element positioned adjacent to a lower portion of the mode conversion pin is positioned adjacent to an upper portion of the mode conversion pin supported on a vertical surface of the sliding groove
Removable inline skates.