KR20180084031A - Treadmill - Google Patents

Abstract

Disclosed is a treadmill. The disclosed treadmill comprises: a plurality of slats which extend in a first direction, and are arranged in a second direction vertical to the first direction; and a frame structure which supports both side portions of the plurality of slats so as to allow the plurality of slats to move in the second direction. In particular, the frame structure comprises: first and second frames which are placed in parallel to each other; first and second rotation modules which are respectively provided on the first and second frames to movably support the plurality of slats; and a load sensor which is provided in front or in back of at least one of the first and second frames, and includes a front sensor and a back sensor configured to detect the load of a user delivered via the first and second rotation modules and applied to the plurality of slats.

Description

Treadmill {Treadmill}

The present invention relates to a treadmill.

The treadmill is called a treadmill, which is a fitness device that can bring about a walking or beating effect in a narrow space using a belt rotating in an infinite orbit. The demand for treadmills is increasing day by day, because they can walk or run in indoor at moderate temperatures regardless of the weather.

Recently, a new type of treadmill has been developed to meet the various demands of the consumer for such a treadmill.

As an example, in order to reproduce the landing effect felt on an actual track, a treadmill having a track structure composed of a plurality of slats capable of supporting a load of a user without a deck has been developed.

In this track structure, each of the plurality of slats extends in a direction perpendicular to the rotational direction, and a plurality of slats are arranged along the rotational direction. The user is brought into contact with the slat in place of the rubber belt to perform the exercise and thus the feeling of being closer to the actual track can be obtained as compared with the case in which the exercise is performed using the conventional simple rubber belt structure.

In the course of the user's exercise in such a track structure, the load of the user acts on a plurality of rotating slats. In other words, in a treadmill having such a track structure, unlike a general treadmill in which a user's load acts on a deck fixed to a lower portion of a track belt, a load of a user is applied to a part of a plurality of slats rotating and moving.

As described above, since the slat, which is the portion where the load of the user is applied, moves without being fixed, it is considerably difficult to provide a load sensor for detecting the load of the user.

It is an object of the present invention to provide a treadmill including a load sensor that can easily maintain and repair a user while accurately detecting a load of a user while adopting a track structure in which a plurality of slats rotatably movable.

Another object of the present invention is to provide a treadmill for controlling the movement of a plurality of slats by using such a load sensor.

A treadmill according to one aspect of the present invention,

A plurality of slats extending in a first direction and arranged in a second direction perpendicular to the first direction,

And a frame structure for supporting both sides of the plurality of slats so that the plurality of slats are movable in the second direction,

The frame structure includes:

First and second frames arranged parallel to each other;

First and second rotation modules provided on the first and second frames, respectively, for supporting the plurality of slats movably; And

A front sensor and a rear sensor provided at front and rear of at least one of the first and second frames for detecting a load of a user acting on the plurality of slats transmitted via the first and second rotation modules, And a load sensor including the load sensor.

In one embodiment, each of the plurality of slats includes both side portions overlapping the first and second frames and a central portion disposed between the both side portions, and the load sensor is disposed at a central portion of the plurality of slats They can be arranged so as not to overlap.

In one embodiment, each of the first and second frames includes a center frame disposed at a lower portion of the plurality of slats, a side frame disposed outside the center frame, a plurality of As shown in FIG.

In one embodiment, the load sensor may be disposed between the center frame and the side frame.

In one embodiment, the apparatus further includes a connection frame connecting the center frame and the side frame, and the load sensor may be disposed in the connection frame.

In one embodiment, the load sensor may be disposed between the side frame and the plurality of legs.

In one embodiment, each of the first and second rotary modules includes a front pulley and a rear pulley provided forward and rearward of the first and second frames, and a front pulley and a rear pulley disposed between the front pulley and the rear pulley, And may include a plurality of bearings having diameters smaller than the diameter of the pulleys and the rear pulleys.

In one embodiment, the apparatus further comprises first and second belts disposed on the lower surface of both sides of the plurality of slats, the first and second belts connecting the plurality of slats, , The rear pulley and the plurality of bearings.

In one embodiment, the control unit may further include a control unit for controlling the movement of the plurality of slats based on the detected load of the user.

According to another aspect of the present invention,

A plurality of slats extending in a first direction and arranged in a second direction perpendicular to the first direction and a plurality of slats arranged in a frame supporting the both sides of the plurality of slats so as to be movable in the second direction, ≪ / RTI >

The frame structure includes:

First and second frames arranged parallel to each other;

First and second rotation modules provided on the first and second frames, respectively, for supporting the plurality of slats movably; And

And at least one load sensor provided on at least one of the first and second frames for detecting a load of a user acting on the plurality of slats transmitted via the first rotation module or the second rotation module can do.

In one embodiment, each of the plurality of slats includes both side portions overlapping the first and second frames and a central portion disposed between the both side portions, and the load sensor is disposed at a central portion of the plurality of slats They can be arranged so as not to overlap.

In one embodiment, each of the first and second frames includes a center frame disposed at a lower portion of the plurality of slats, a side frame disposed outside the center frame, a plurality of As shown in FIG.

In one embodiment, the load sensor may be disposed between the center frame and the side frame.

In one embodiment, the apparatus further includes a connection frame connecting the center frame and the side frame, and the load sensor may be disposed in the connection frame.

In one embodiment, the load sensor may be disposed between the side frame and the plurality of legs.

In one embodiment, each of the first and second rotary modules includes a front pulley and a rear pulley provided forward and rearward of the first and second frames, and a front pulley and a rear pulley disposed between the front pulley and the rear pulley, And may include a plurality of bearings having diameters smaller than the diameter of the pulleys and the rear pulleys.

In one embodiment, the apparatus further comprises first and second belts disposed on the inner surface of both sides of the plurality of slats and connecting the plurality of slats, wherein the first and second belts are disposed on the front pulley, Pulleys and a plurality of bearings.

In one embodiment, the control unit may further include a control unit for controlling the movement of the plurality of slats based on the detected load of the user.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

These general and specific aspects may be implemented by using a system, method, computer program, or any combination of systems, methods, and computer programs.

INDUSTRIAL APPLICABILITY As described above, the treadmill according to the present invention can easily maintain and repair the load sensor while accurately detecting the load of the user even though the track structure of the plurality of slats rotatably movable is used.

Further, the treadmill according to the present invention can control the movement of a plurality of slats while adopting a track structure in which the value of a plurality of slats rotatably movable is worth.

1 is a perspective view showing a treadmill according to an embodiment,
Fig. 2 is a perspective view showing the interior of the treadmill of Fig. 1;
Figure 3 is an exploded perspective view of the frame structure of Figure 2;
Fig. 4 is a partial plan view showing a state in which the frame structure of Fig. 3 is assembled.
5A and 5B show the use state of the treadmill according to the embodiment.
6A and 6B are views for explaining an example in which a load sensor is arranged in a treadmill according to an embodiment.
7A and 7B are views for explaining another example in which the load sensor is arranged in the treadmill according to the embodiment.

Hereinafter, a configuration of a treadmill according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

1 is a perspective view showing a treadmill 1 according to an embodiment, and Fig. 2 is a perspective view showing the inside of the treadmill 1 of Fig.

Referring to Fig. 1, the treadmill 1 includes a plurality of slats 10, first and second side covers 21 and 22, a handle post 50, and the like.

The slats 10 may extend in a first direction and may be arranged in a second direction perpendicular to the first direction. 1, the first direction may be the X-axis direction, and the second direction may be the Y-axis direction. The slats 10 can be moved along the second direction by the user's foot motion.

First and second side covers 21 and 22 are provided on both sides of the slats 10 in the longitudinal direction (first direction). The first and second side covers 21 and 22 may be provided to cover the first and second side frames 412 and 422 (see FIG. 2).

The upper portions of the first and second side covers 21 and 22 may have a flat shape. The material of the first and second side covers 21 and 22 may include plastic.

The handle post 50 may be connected to the first and second side frames 412 and 422 (see FIG. 2) by supporting a mounted handle for safety during movement of the user.

Referring to FIG. 2, a frame structure 40 is provided inside the plurality of slats 10, the first and second side covers 21 and 22. The frame structure 40 supports both sides of the plurality of slats 10 so that the plurality of slats 10 can move in the second direction (Y-axis direction).

3 is an exploded perspective view of the frame structure 40 of FIG. Referring to FIG. 3, the frame structure 40 includes first and second frames 410 and 420 disposed in parallel so as to have a first width in a first direction.

The first frame 410 includes a first center frame 411 and a first side frame 412 and a plurality of first legs 413. The second frame 420 includes a second center frame 421, A second side frame 422, and a plurality of second legs 423.

The first frame 410 and the second frame 420 are fixedly connected by a plurality of center connection frames 473.

4 is a partial plan view showing a state in which the frame structure 40 of FIG. 3 is assembled. Referring to FIGS. 3 and 4, the first side frame 412 is disposed outside the first center frame 411 and connected to the first center frame 411. The first side frame 412 may not overlap with the plurality of slats 10 in the vertical direction (Z-axis direction).

The second side frame 422 is disposed outside the second center frame 421 and connected to the second center frame 421. The second side frame 422 may not overlap with the plurality of slats 10 in the vertical direction (Z-axis direction).

The first center frame 411 and the first side frame 412 can be fixedly connected to the front and rear regions by a plurality of connection frames 471 and 472. The front and rear regions of the second center frame 421 and the second side frame 422 can be fixedly connected by a plurality of connection frames 471 and 472.

For example, the first center frame 411 and the first side frame 412 are fixed by the front connection frame 471 and the rear connection frame 472, and the second center frame 421 and the second side frame 412, The rear connecting frame 422 can be fixed by the front connecting frame 471 and the rear connecting frame 472. [

The front connection frame 471 and the rear connection frame 472 are disposed in the front area and the rear area of the first frame 410 and the second frame 420, respectively. The front connection frame 471 and the rear connection frame 472 are protruded from the first center frame 411 and the second center frame 421 and are overlapped with the first side frame 412 and the second side frame 422 do. The front connecting frame 471 and the rear connecting frame 472 are fixedly connected to the first center frame 411 and the second center frame 421 and at the same time the first side frame 412 and the second side frame 422 As shown in Fig.

The plurality of first leg portions 413 are disposed between the first side frame 412 and the bottom surface and support a load acting on the first side frame 412. The plurality of first leg portions 413 may be fixedly connected to the first side frame 412.

The plurality of second leg portions 423 are disposed between the second side frame 422 and the bottom surface and support a load acting on the second side frame 422. The plurality of second leg portions 423 may be fixedly connected to the second side frame 422.

The frame structure 40 further includes first and second rotation modules 430 and 440 provided on each of the first and second frames 410 and 420 to movably support the plurality of slats 10.

The first rotation module 430 includes a front pulley 451 provided in front of the first frame 410 and a rear pulley 452 provided behind the first frame 410 and a front pulley 451 and a rear pulley 452, 452 disposed between the first and second bearings 452, 453. The diameter of each of the plurality of bearings 453 is smaller than the diameter of the front pulley 451 and the diameter of the rear pulley 452.

The second rotation module 440 includes a front pulley 451 provided in front of the second frame 420 and a rear pulley 452 provided at the rear of the second frame 420 and a front pulley 451 and a rear pulley 452, 452 disposed between the first and second bearings 452, 453. Each of the plurality of bearings 453 is smaller than the diameter of the front pulley 451 and the diameter of the rear pulley 452.

The plurality of bearings 453 may be arranged flat. For example, the plurality of bearings 453 may be arranged at the same height as the bearings 453 in which the bearings 453 disposed in the front region and the rear region are disposed in the central region.

The frame structure 40 further includes at least one load sensor 500 for detecting the load of the user and a control unit 600 for controlling the movement of the plurality of slats 10 based on the detected load of the user .

The load sensor 500 may be a load cell. The load sensor 500 may measure at least one of a tensile stress, a compressive stress, a bending stress, and a shear stress of the frame structure 40 due to a load by a user. As described above, by using the load cell as the load sensor 500, the cost is lower than that of the optical sensor and the ultrasonic sensor, and the measurement accuracy can be improved.

When the treadmill 1 according to the embodiment is a power-driven treadmill driven by power, the control unit may further include a motor 700 that provides a driving force. The control unit 600 is connected to the motor 700 and can control the rotation speed of the motor 700. [ As an example, the motor 700 may be connected to the front pulley 451 by a belt 710 and may control the rotational speed of the front pulley 451.

The control unit 600 controls the load applied to at least one of the first and second rotation modules 430 and 440 so that the load applied to at least one of the first and second rotation modules 430 and 440 is controlled. (Not shown) for adjusting the inclination of the track part or a slope adjusting part (not shown) for adjusting the inclination of the track part.

5A and 5B show the use state of the treadmill according to the embodiment.

5A and 5B, a plurality of slats 10 are connected by first and second belts 461 and 462 disposed on both sides 11 and 12, respectively. The first and second belts 461 and 462 have a closed loop shape. The first and second belts 461 and 462 can be fixed to the inner surfaces of the side portions 11 and 12 of the plurality of slats 10. These first and second belts 461 and 462 are wound and rotated by a front pulley 451, a rear pulley 452 and a plurality of bearings 453.

The plurality of slats 10 are movable relative to the frame structure 40 by first and second belts 461 and 462, a front pulley 451, a rear pulley 452 and a plurality of bearings 453 do. As the user U is placed on the plurality of slats 10, a plurality of slats 10 can be rotated by the foot U of the user U as the exercise is performed.

5B, in the course of the user U performing a movement on the plurality of slats 10, the slat 10, which is in contact with the user U among the plurality of slats 10, The load is applied. Here, the load by the user U may vary depending on the weight of the user U and the amount of impact applied by the user U in the course of the exercise.

As described above, in the treadmill 1 according to the embodiment, unlike a general treadmill in which a user's load acts on a deck fixed to the lower portion of the track belt, a portion of the plurality of slats 10, The load is applied. In other words, since the slat 10, which is the part of the load of the user U, moves without being fixed, the method of installing the load sensor 500 on the fixed deck can no longer be applied.

However, the transmission path of the load acting on the plurality of slats 10 will be described below.

Referring to FIG. 3, loads acting on the plurality of slats 10 are transmitted to the frame structure 40 via the first and second rotation modules 430 and 440. For example, the load acting on the slats 10 is transmitted to the bearings 453 which support the opposite sides 11, 12 of the slats 10, and the loads transmitted to the bearings 453 are transmitted to the first and second And are transmitted to the outside via the frames 410 and 420.

Even if the load of the user U is applied to a plurality of rotating slats 10, rather than a fixed deck, the load of the user U acting on the slats 10 is reduced by the first and second rotations And transmitted to the first and second frames 410 and 420 through the modules 430 and 440.

In the treadmill 1 according to the embodiment, the load sensor 500 is disposed on at least one of the first and second frames 410 and 420 in consideration of the load transmission path. Accordingly, even if the load of the user U acts on the rotating slat 10, the load sensor 500 can detect the load of the user U accurately.

Referring again to FIGS. 1 and 4, the slat 10 includes two side portions 11, 12 overlapping the first and second frames 410, 420 and a central portion 13). Both sides 11 and 12 may overlap the first center frame 411 of the first frame 410 and the second center frame 421 of the second frame 420. [ The central portion 13 overlaps the spacing space between the first and second center frames 411 and 421.

As an example, the load sensor 500 may be provided in the first frame 410. The load sensor 500 may not overlap the central portion 13 of the plurality of slats 10 in the vertical direction. Accordingly, the first side cover 21 can be separated from the treadmill 1, and the load sensor 500 can be easily exposed to the outside. Accordingly, not only can the load sensor 500 be easily installed, but maintenance and repair can be facilitated even after installation.

A typical treadmill includes a deck having a plate shape and a track belt that rotates relative to the deck. The load of the user located on the track belt acts on the deck located at the bottom of the track belt. Accordingly, in order to detect the position of the user, the load sensor 500 is disposed at a position overlapping the deck. However, in order to install or replace the load sensor 500, since the load sensor 500 is disposed at a position where the load sensor 500 overlaps with the track belt on the track belt in the vertical direction, Which had to be separated.

However, in the treadmill according to the embodiment, the load sensor 500 is disposed on at least one of the first frame 410 and the second frame 420 which are not overlapped with the central portion 13 of the plurality of slats 10 The installation or replacement becomes very easy as compared with the case in which it is installed in the deck.

The load sensor 500 may be disposed in a load transmission path through which a load of a user acting on the slat 10 is transmitted to the outside.

The load acting on the slat 10 is transmitted to the first and second center frames 411 and 421 via the bearing 453. [ The loads transmitted to the first and second center frames 411 and 421 are transmitted to the first and second side frames 412 and 422 via at least one of the front connection frame 471 and the rear connection frame 472 do. The load transmitted to the first and second side frames 412 and 422 is transmitted to the outside by the first and second leg portions 413 and 423.

6A and 6B are views for explaining an example in which the load sensor 500 is disposed in the treadmill according to the embodiment. 6A, as an example, the load sensor 500 may be disposed on a front connection frame 471 connecting the first center frame 411 and the first side frame 412. Referring to FIG. 6B, as another example, the load sensor 500 may be disposed between the first side frame 412 and the first leg portion 413.

As described above, in the treadmill 1 according to the embodiment, the load sensor 500 is disposed on the path through which the load acting on the user is transmitted, whereby the load of the user can be detected.

On the other hand, the plurality of slats 10 may include plastic. Accordingly, in the treadmill 1 according to the embodiment, in the course of the load acting on the slats 10 by the user, the impact can be absorbed by bending the slats 10 themselves. As described above, since the slats 10 themselves can absorb the shocks by bending, a separate structure for shock absorption can be avoided, The load transmitted to the structure 40 can be transmitted to the load sensor 500 without loss. Therefore, the load sensor 500 can be precisely measured without a separate signal amplification configuration.

The load sensor 500 disposed in the first frame 410 can detect whether or not the user is located on the slat 10. As an example, the load sensor 500 may detect whether the user is located on the plurality of slats 10 when the detected load is greater than a predetermined reference load.

The treadmill 1 can control the movement of the plurality of slats 10 based on the information detected by the load sensor 500. [

For example, in the case of a treadmill 1 in which a plurality of slats 10 are rotated by a user's action, a load greater than a reference load such that a presence of a user is detected on the plurality of slats 10 The control unit can change the plurality of slats 10 from the non-movable state to the movable state. For example, it is possible to reduce resistance forces acting on the first and second rotation modules 430 and 440, and to change a plurality of slats 10 from a non-movable state to a movable state.

As described above, a plurality of slats 10 can be changed into a movable state by only climbing on a plurality of slats 10 without the user pressing a separate input button by hand.

However, the load sensor 500 is not limited to a single number, and may be plural. For example, the load sensor 500 may include a front sensor 501 and a rear sensor 502 provided at the front and rear of the first and second frames 410 and 420, respectively.

7A and 7B are views for explaining another example in which the load sensor 500 is disposed in the treadmill 1A and 1B according to the embodiment. 7A, the front sensor 501 and the rear sensor 502 in the treadmill 1A according to another embodiment include first and second center frames 411 and 421, first and second center frames 411 and 421, And may be disposed in the front and rear connecting frames 474, 472 connecting the side frames 412, 422. Referring to FIG. 7B, as another example, in the treadmill 1B according to the embodiment, the front sensor 501 and the rear sensor 502 include first and second side frames 412 and 422, Two leg portions 413 and 423, respectively.

The front sensor 501 and the rear sensor 502 can detect at least one of the position and the moving direction of the user. Based on the detected information, the rotational speed of the plurality of slats 10 can be adjusted.

As an example, the rotation speed of the plurality of slats 10 can be adjusted according to the position of the user detected by the front sensor 501 and the rear sensor 502. [ For example, when the user's position is the front region, the rotational speed of the plurality of slats 10 can be increased. For example, when the user's position is the reference area, the rotational speed of the plurality of slats 10 can be maintained. For example, when the user's position is the rear region, the rotational speed of the plurality of slats 10 can be reduced.

As another example, the rotational speeds of the plurality of slats 10 can be adjusted according to the direction of movement of the user detected by the front sensor 501 and the rear sensor 502. [ For example, when the user is detected to move forward by the front sensor 501 and the rear sensor 502, the rotational speed of the plurality of slats 10 can be increased. For example, when the user is detected to move backward by the front sensor 501 and the rear sensor 502, the rotational speed of the plurality of slats 10 can be reduced.

The front sensor 501 and the rear sensor 502 may include a plurality of strain gauges. Accordingly, the front sensor 501 and the rear sensor 502 can constitute one Wheatstone bridge circuit, and the position of the user can be grasped by the bridge voltage difference.

On the other hand, in the treadmill 1, 1A, and 1B according to the above-described embodiment, the example in which the plurality of slats 10 move linearly in the upper region has been described. However, the structure for rotational movement of the plurality of slats 10 of the treadmill 1, 1A, 1B is not limited thereto and can be variously modified. For example, the treadmill 1 may have a structure in which a plurality of slats 10 are inclined and moved in the front region and the rear region in the upper region of the treadmill 1C.

Although the above embodiment has been described with reference to the non-powered treadmill in which the plurality of slats 10 of the treadmill 1, 1A, 1B, are rotated by the foot driving of the user, the present invention is not limited thereto. , It can also be applied to a power treadmill. For example, although not shown in the drawings, in the treadmill according to the embodiment, a motor for rotating the front pulley 451 may be disposed inside the plurality of slats 10.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention. These general and specific aspects may be implemented by using a system, method, computer program, or any combination of systems, methods, and computer programs.

1: Treadmill
10: Slats
11, 12: Both sides
13: Center
21, 22: first and second side covers
30: Handle column
40: frame structure
410: first frame
420: second frame
411: first center frame
421: second center frame
412: first side frame
422: second side frame
413: first leg
423: second leg
430: first rotation module
440: second rotation module
451: Front pulley
452: rear pulley
453: Bearings
461: first belt
462: second belt
471: front connection frame
472: rear connection frame
473: Center connection frame
500: Load sensor
501: Front sensor
502: rear sensor

Claims (15)

A plurality of slats extending in a first direction and arranged in a second direction perpendicular to the first direction,
A frame structure supporting both sides of the plurality of slats so that the plurality of slats are movable in the second direction; And
And a control unit for controlling movement of the plurality of slats,
The frame structure includes:
First and second frames arranged parallel to each other;
First and second rotation modules provided on the first and second frames, respectively, for supporting the plurality of slats movably; And
A front sensor and a rear sensor provided at front and rear of at least one of the first and second frames for detecting a load of a user acting on the plurality of slats transmitted via the first and second rotation modules, And a load sensor,
Wherein each of the plurality of slats includes both side portions overlapping the first and second frames and a central portion disposed between the both side portions,
Wherein the load sensor is disposed so as not to overlap the central portion of the plurality of slats,
Wherein the control unit controls the movement of the plurality of slats based on a load of the user detected by the load sensor. The method according to claim 1,
Wherein the control unit adjusts the rotational speed of the plurality of slats according to a position of the user detected by the front sensor and the rear sensor. 3. The method of claim 2,
When the position of the user is detected as the front region by the front sensor and the rear sensor, the control unit increases the rotational speed of the plurality of slats,
Wherein the controller reduces the rotational speed of the plurality of slats when the position of the user is detected as a rear region by the front sensor and the rear sensor. The method according to claim 1,
Wherein the control unit adjusts the rotational speed of the plurality of slats in accordance with a direction of movement of the user detected by the front sensor and the rear sensor. 5. The method of claim 4,
The control unit increases the rotational speed of the plurality of slats when the user is detected to move forward by the front sensor and the rear sensor,
Wherein when the user is detected to move backward by the front sensor and the rear sensor, the control unit reduces the rotational speed of the plurality of slats. The method according to claim 2 or 4,
Further comprising a motor coupled to at least one of the first and second rotating modules and providing a driving force,
And the control unit controls the rotation speed of the motor. The method according to claim 1,
Wherein each of the first and second frames comprises:
A center frame disposed at a lower portion of the plurality of slats,
A side frame disposed outside the center frame,
And a plurality of legs supporting a load of the side frame. 8. The method of claim 7,
Wherein the load sensor is disposed between the center frame and the side frame. 9. The method of claim 8,
And a connection frame connecting the center frame and the side frame,
Wherein the load sensor is disposed in the connection frame. 8. The method of claim 7,
Wherein the load sensor is disposed between the side frame and the plurality of legs. The method according to claim 1,
Wherein each of the first and second rotation modules includes:
A front pulley and a rear pulley provided forward and rearward of the first and second frames,
And a plurality of bearings disposed between the front and rear pulleys and having a diameter less than a diameter of the front and rear pulleys. 12. The method of claim 11,
Further comprising first and second belts disposed on the lower surface of both sides of the plurality of slats and connecting the plurality of slats,
Wherein the first and second belts are wound on the front pulley, the rear pulley and the plurality of bearings. A plurality of slats extending in a first direction and arranged in a second direction perpendicular to the first direction,
A frame structure supporting both sides of the plurality of slats so that the plurality of slats are movable in the second direction; And
And a control unit for controlling movement of the plurality of slats,
The frame structure includes:
First and second frames arranged parallel to each other;
First and second rotation modules provided on the first and second frames, respectively, for supporting the plurality of slats movably; And
And at least one load sensor provided on at least one of the first and second frames for detecting a load of a user acting on the plurality of slats transmitted via the first rotation module or the second rotation module In addition,
Wherein each of the plurality of slats includes both side portions overlapping the first and second frames and a central portion disposed between the both side portions,
Wherein the load sensor is disposed so as not to overlap the central portion of the plurality of slats,
Wherein the control unit controls the movement of the plurality of slats based on a load of the user detected by the load sensor. 14. The method of claim 13,
Wherein the control unit changes the plurality of slats from a non-movable state to a movable state when a load greater than a predetermined reference load is detected by the load sensor. 15. The method of claim 14,
Wherein the control unit reduces resistance forces acting on the first and second rotation modules to change the plurality of slats from a non-movable state to a movable state.

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