KR102094713B1 - Continuously weight adjustable fitness equipment - Google Patents

Abstract

The present invention relates to exercise equipment. An exercise device according to an embodiment includes a first pulley rotatably provided around a first axis; A second pulley rotatably provided around a second axis parallel to the first axis; A belt winding the first pulley and the second pulley; It includes a radius adjusting unit for adjusting the radius of winding the first pulley of the belt and the radius of winding the second pulley, wherein the first pulley, the first plate and the first winding of the belt between one side facing each other It includes a second plate, and the second pulley includes a third plate and a fourth plate on which the belt is wound between one side facing each other, and on the one side of the first plate, the second plate along the circumferential direction. A first inclined surface inclined in the direction of the rotational center is formed toward the direction toward, and a second inclined surface inclined in the direction of the rotational center toward the first plate along the circumferential direction is formed on the one surface of the second plate. The third surface of the third plate is inclined toward the center of rotation as it goes toward the fourth plate along the circumferential direction. A slope is formed, and a fourth inclined surface is inclined in the rotational center direction toward the third plate along the circumferential direction on the one surface of the fourth plate, and both side ends of the belt are the first inclined surface, the first It is provided to be in contact with the two inclined surfaces, the third inclined surface and the fourth inclined surface, and the radius adjusting unit adjusts the space between the first plate and the second plate and the space between the third plate and the fourth plate. .

Description

CONTINUOUSLY WEIGHT ADJUSTABLE FITNESS EQUIPMENT}

The present invention relates to an exercise device, and more particularly, to an exercise device capable of continuously adjusting the weight.

When exercising using weight, it is very important to provide an appropriate weight according to the strength of the user. If the weight is too low, the effect of exercise may be reduced, and excessive weight may cause injury.

Therefore, in general, exercise equipment using weight is provided to enable weight adjustment according to a difference in muscle strength of the user. However, the weight control method of a general exercise equipment simply adjusts the weight by inserting pins into a plurality of stacked weights to control the number of weights. However, in this method of weight control, since the total weight is adjusted by the weight of the weight for each unit, a discontinuous section occurs when adjusting the weight.

Such a discontinuous section may cause an injury by providing a weight that is less than an appropriate weight depending on a user, or impairing an exercise effect or providing an excessive weight. Sudden excessive increase due to the discontinuous section may also cause injury.

The present invention is to provide an exercise device capable of continuously adjusting the weight.

In addition, the present invention is to provide an exercise device that can increase the exercise effect through fine weight control.

In addition, the present invention is to provide an exercise device capable of preventing injury due to excessive weight and excessive weight.

The problem to be solved by the present invention is not limited to this, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention provides an exercise device. According to an embodiment, the exercise device includes a first pulley rotatably provided about a first axis; A second pulley rotatably provided around a second axis parallel to the first axis; A belt winding the first pulley and the second pulley; And a radius adjusting unit for adjusting a radius of winding the first pulley and a radius of winding the second pulley of the belt, wherein the first pulley is a first plate and a first winding of the belt between one side facing each other. It includes a second plate, and the second pulley includes a third plate and a fourth plate in which the belt is wound between one side facing each other, and the second plate along the circumferential direction on the one side of the first plate. A first inclined surface inclined in the direction of the rotational center is formed toward the direction toward, and a second inclined surface inclined in the direction of the rotational center toward the first plate along the circumferential direction is formed on the one surface of the second plate. The third surface of the third plate is inclined toward the center of rotation as it goes toward the fourth plate along the circumferential direction. A slope is formed, and a fourth inclined surface is inclined in the rotational center direction toward the third plate along the circumferential direction on the one surface of the fourth plate, and both side ends of the belt are the first inclined surface, the first It is provided to be in contact with the two inclined surfaces, the third inclined surface and the fourth inclined surface, and the radius adjusting unit adjusts the space between the first plate and the second plate and the space between the third plate and the fourth plate. .

The exercise device includes a first line wound around the first axis; A second line wound around the second axis; A heavy object connected to the end of the first line; Further comprising a handle connected to the end of the second line, the first line and the second line is provided so that the first axis and the second axis are rotated in the same direction as each other, one is wound and the other is released. Can be.

The first plate and the third plate are provided at positions corresponding to each other, the second plate and the fourth plate are provided at positions corresponding to each other, and the first plate is provided to be movable along the first axis The fourth plate is provided to be movable along the second axis, and the radius adjustment unit can move the first plate and the fourth plate.

Between the first plate and the second plate is provided a first elastic member for applying a force in a direction away from the first plate and the second plate, between the third plate and the fourth plate, the A second elastic member is provided that applies a force in a direction in which the third plate and the fourth plate are spaced apart from each other, and the radius adjusting unit includes: a first contact member contacting an opposite surface of the one surface of the first plate; A second contact member contacting an opposite surface of the one surface of the fourth plate; A moving axis in which a longitudinal direction is provided parallel to the first axis and the second axis, and connected to the first contact member and the second contact member; It may include a driving unit for moving the moving shaft along the longitudinal direction.

A bearing may be provided on a surface of the first contact member facing the first plate and a surface of the second contact member facing the fourth plate.

The first contact member includes a first moving plate provided with a central portion penetrating through the first axis so as to be movable along the first axis, and in the second contact member, a central portion penetrating through the second axis is provided to the first contact member. A second moving plate is provided to be movable along two axes, and the bearings may be provided along the circumferential direction of the first moving plate and the circumferential direction of the second moving plate, respectively.

The driving part may include a screw part screwed to an end of the moving shaft.

The driving unit further includes a rotating plate connected to the side of the screw portion in a toothed gear manner, wherein the rotating plate is provided with a larger diameter than the screw portion, and an adjustment handle protruding outward may be provided on one surface of the rotating plate. have.

The radius adjustment unit may further include a graduation member indicating the position of the adjustment handle along the rotation path of the adjustment handle.

The inclination of the first inclined surface and the third inclined surface is the same, the inclination of the second inclined surface and the fourth inclined surface is the same, and corresponding to inclinations of the first inclined surface and the third inclined surface, respectively, on both side ends of the belt. An inclined surface having an inclined surface and an inclined surface having an inclined surface corresponding to the inclined surfaces of the second inclined surface and the fourth inclined surface may be formed.

The exercise device according to an embodiment of the present invention can continuously adjust the weight.

In addition, the exercise device according to an embodiment of the present invention can increase the exercise effect through fine weight control.

In addition, the exercise device according to an embodiment of the present invention can prevent an injury due to excessive weight and excessive increase.

The problem to be solved by the present invention is not limited to this, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a perspective view showing an exercise device according to an embodiment of the present invention so that one side is visible.
Figure 2 is a perspective view showing the other side of the exercise device of Figure 1 is visible.
FIG. 3 is an enlarged perspective view of the first pulley, the second pulley, the belt and the radius adjusting unit of FIGS. 1 and 2.
FIG. 4 is a plan view showing a part of the first pulley, the second pulley and the radius adjusting unit of FIG. 3.
5 is a cross-sectional view showing a cross section of the belt of FIG. 1.
6 is a perspective view showing the driving unit of FIG. 3.
7 is a cross-sectional view showing the connection relationship between the screw portion and the moving shaft of FIG. 6.
8 is a perspective view showing the graduation member of FIG. 3.
9 is a view for explaining the principle of continuous weight control of the exercise device of FIG.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the following embodiments. This embodiment is provided to more fully describe the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings has been exaggerated to emphasize a clearer explanation.

1 is a perspective view showing one side of the exercise device 10 according to an embodiment of the present invention. FIG. 2 is a perspective view showing the other side of the exercise device 10 of FIG. 1. 3 is an enlarged perspective view of the first pulley 100, the second pulley 200, the belt 300, and the radius adjustment unit 400 of FIGS. 1 and 2. FIG. 4 is a plan view showing a part of the first pulley 100, the second pulley 200 and the radius adjustment unit 400 of FIG. 3. 1 to 4, the exercise device 10 includes a first pulley 100, a second pulley 200, a belt 300, a radius adjusting unit 400, a weight 500 and a handle 600 It includes.

The first pulley 100 is rotatably provided around the first axis 101. The first pulley 100 includes a first plate 110 and a second plate 120.

The first plate 110 and the second plate 120 are provided to face one another. The belt 300 is wound between the first plate 110 and the second plate 120.

A first inclined surface 111 inclined in the rotational center direction is formed on the one surface of the first plate 110 toward the second plate 120 along the circumferential direction.

A second inclined surface 121 inclined in the rotational center direction is formed on the one surface of the second plate 120 toward the first plate 110 along the circumferential direction.

The second pulley 200 is rotatably provided about the second shaft 201. The second axis 201 is provided parallel to the first axis 101. The second pulley 200 includes a third plate 210 and a fourth plate 220.

The third plate 210 and the fourth plate 220 are provided to face one another. The belt 300 is wound between the third plate 210 and the fourth plate 220.

A third inclined surface 211 inclined in the rotational center direction is formed on the one surface of the third plate 210 toward the fourth plate 220 along the circumferential direction.

A fourth inclined surface 221 inclined in the rotational center direction is formed on the one surface of the fourth plate 220 toward the third plate 210 along the circumferential direction.

According to one embodiment, the first plate 110 and the third plate are provided at positions corresponding to each other. The second plate 120 and the fourth plate are provided at positions corresponding to each other.

According to an embodiment, the first elastic member 102 is provided between the first plate 110 and the second plate 120. The first elastic member 102 exerts a force in a direction in which the first plate 110 and the second plate 120 are spaced apart from each other. According to an embodiment, the first elastic member 102 may be provided as a spring provided to wind the first shaft 101 between the first plate 110 and the second plate 120. Alternatively, the first elastic member 102 may be provided in various configurations in which the first plate 110 and the second plate 120 can exert a force in a direction away from each other.

A second elastic member 202 is provided between the third plate 210 and the fourth plate 220. The second elastic member 202 exerts a force in a direction in which the third plate 210 and the fourth plate 220 are separated from each other. According to an embodiment, the second elastic member 202 may be provided as a spring provided to wind the second shaft 201 between the third plate 210 and the fourth plate 220. Alternatively, the second elastic member 202 may be provided in various configurations in which the third plate 210 and the fourth plate 220 can exert a force in a direction away from each other. The first elastic member 102 and the second elastic member 202 may be provided with the same configuration.

According to an embodiment, both ends of the first shaft 101 and the second shaft 201 may be rotatably connected to the first support plate 701 and the second support plate 702, respectively. The first support plate 701 and the second support plate 702 support the first shaft 101 and the second shaft 201 to be rotatable. The first support plate 701 and the second support plate 702 may support the moving shaft 430 to be described below. For example, both ends of the moving shaft 430 may be provided to penetrate the first support plate 701 and the second plate 120, respectively, so as to be linearly movable. The movement shaft 430 may be provided in an angled shape so that the movement shaft 430 is not rotated along the longitudinal direction, and the movement shaft 430 of the first support plate 701 and the second support plate 702 may be provided. The through hole may be provided in a shape corresponding to the shape of the cross section of the moving shaft 430. One end of the moving shaft 430 passes through one of the first support plate 701 and the second support plate 702 to the outer surface of the first support plate 701 and the second support plate 702. It may be screwed to the provided screw portion 441. In this case, the screw portion 441 is provided to be rotatable on the outer surface. Accordingly, the rotating plate 442 to be described later may also be provided to be rotatable by being gear-engaged with the screw portion 441 on the outer surface provided with the screw portion 441. In this case, the graduation member 444 to be described below is provided on the outer surface provided with the threaded portion 441, and may be provided in a shape in which graduations are formed in the housing surrounding the rotating plate 442 and the threaded portion 441.

5 is a cross-sectional view showing a cross section of the belt 300 of FIG. 1. 3 and 5, the belt 300 winds the first pulley 100 and the second pulley 200. Both side ends of the belt 300 are in contact with the first inclined surface 111, the second inclined surface 121, the third inclined surface 211 and the fourth inclined surface. According to an embodiment, the inclinations of the first inclined surface 111 and the third inclined surface 211 may be provided in the same way. The inclinations of the second inclined surface 121 and the fourth inclined surface 221 may be provided in the same manner. Slopes 301 and 302 may be formed at both side ends of the belt 300. An inclined surface 301 having an inclination corresponding to the inclinations of the first inclined surface 111 and the third inclined surface 211 is formed at the side ends of the belt 300 in contact with the first inclined surface 111 and the third inclined surface 211. do. An inclined surface 302 having an inclination corresponding to the inclination of the second inclined surface 121 and the fourth inclined surface 221 is formed on the side ends of the belt 300 in contact with the second inclined surface 121 and the fourth inclined surface 221. do.

Referring to FIGS. 1 to 4 again, the radius adjusting unit 400 adjusts the radius of winding the first pulley 100 of the belt 300 and the radius of winding the second pulley 200. The radius adjusting unit 400 adjusts the distance between the first plate 110 and the second plate 120 and the distance between the third plate 210 and the fourth plate 220, thereby controlling the first distance of the belt 300. The radius of winding the pulley 100 and the radius of winding the second pulley 200 are adjusted.

According to one embodiment, the first plate 110 is provided to be movable along the first axis 101. The fourth plate 220 is provided to be movable along the second axis 201. The radius adjustment unit 400 moves the first plate 110 and the fourth plate 220.

For example, the radius adjustment unit 400 may include a first contact member 410, a second contact member 420, a moving shaft 430, and a driving unit 440.

The first contact member 410 contacts the opposite surface of the one surface of the first plate 110. The second contact member 420 is in contact with the opposite surface of the one surface of the fourth plate 220. According to one embodiment, bearings 412 and 422 are provided on a surface facing the first plate 110 of the first contact member 410 and a surface facing the fourth plate 220 of the second contact member 420. Is provided.

For example, the first contact member 410 includes a first moving plate 411. The first moving plate 411 is provided so that the central portion penetrates the first shaft 101 and is movable along the first shaft 101. The second contact member 420 includes a second moving plate 421. The second moving plate 421 is provided so that the center portion thereof penetrates the second shaft 201 and is movable along the second shaft 201. The bearings 412 and 422 are arranged along the circumferential direction of the first moving plate 411 and the circumferential direction of the second moving plate 421, respectively. The bearings 412 and 422 may be provided as ball bearings made of a plurality of balls. As described above, by providing the bearings 412 and 422, the first plate 110 and the fourth plate 220 rotate while the first contact member 410 and the second contact member 420 are in contact. Can be.

The moving shaft 430 is provided in a longitudinal direction parallel to the first axis 101 and the second axis 201. The moving shaft 430 is connected to the first contact member 410 and the second contact member 420. The moving shaft 430 is coupled to the driving unit 440 to be described below and transmits the driving force of the driving unit 440 to the first contact member 410 and the second contact member 420. The rotational motion of the driving unit 440 is converted into a linear motion. The first contact member 410 and the second contact member 420 are linearly moved along the first axis 101 and the second axis 201, respectively, by the linear motion of the moving shaft 430.

6 is a perspective view showing the driving unit 440 of FIG. 3. 7 is a cross-sectional view showing a connection relationship between the screw portion 441 and the moving shaft 430 of FIG. 6. 6 and 7, the driving unit 440 moves the moving shaft 430 along the longitudinal direction. According to an embodiment, the driving part 440 includes a screw part 441 and a rotating plate 442.

The screw portion 441 is screwed to the end of the moving shaft 430. Therefore, as the screw portion 441 is rotationally coupled, the moving shaft 430 is provided to linearly move along the longitudinal direction.

The rotating plate 442 is connected to the side of the threaded portion 441 in the direction of a toothed gear. According to one embodiment, the rotating plate 442 may be provided with a larger diameter than the threaded portion 441. However, the ratio of the diameter of the screw portion 441 and the rotating plate 442 may be provided in various ways depending on the force required to move the moving shaft 430 or the precision required to move the moving shaft 430. For example, the diameter of the threaded portion 441 may be provided larger than the diameter of the rotating plate 442.

An adjusting handle 443 protruding outward may be provided on one surface of the rotating plate 442. The user can rotate the rotating plate 442 while holding the adjustment handle 443. The screw part 441 is rotated by the rotation of the rotation plate 442. Accordingly, the moving direction of the moving shaft 430 screwed with the screw portion 441 is determined according to the rotating direction of the rotating plate 442.

8 is a perspective view showing the graduation member 444 of FIG. 3. Referring to FIG. 8, the radius adjustment unit 400 may further include a graduation member 444 indicating the position of the adjustment handle 443 along the rotation path of the adjustment handle 443. By providing the graduation member 444, the user can more accurately adjust the desired weight. When a plurality of weights 500 are provided to be replaced with each other having different weights, the weight ratio for the weights 500 according to the position of the adjustment handle 443 may be displayed on the graduation member 444. Alternatively, when the weight 500 is provided as a single weight, the weight applied to the user may be displayed on the scale member 444 according to the position of the adjustment handle 443.

Referring back to FIGS. 1 and 2, according to an embodiment, the exercise device 10 may further include a weight 500 and a handle 600.

The heavy object 500 is connected to the first shaft 101 by the first line 501. The first line 501 is wound around the first axis 101. The weight 500 is connected to the end of the first line 501. The heavy object 500 may be provided detachably to the first line 501. Therefore, the weight 500 is provided in a plurality of different weights, it is possible to connect the weight 500 of different weights to the first line 501 according to the user's selection.

The handle 600 is connected to the second shaft 201 by a second line 601. The second line 601 is wound around the second axis 201. The handle 600 is connected to the end of the second line 601.

The first line 501 and the second line 601 may be provided so that when the first axis 101 and the second axis 201 rotate in the same direction, one is wound and the other is released.

Therefore, when the user pulls the handle 600, the weight 500 is raised, thereby having an exercise effect.

As described above, the present invention has been described as an example applied to an exercise device 10 that causes an exercise effect by pulling the handle 600 and lifting the heavy object 500. On the other hand, the exercise device 10 can apply a configuration that can continuously adjust the exercise intensity by adjusting the radius of the first pulley 100 and the second pulley 200 of the belt 300 described above. It can be applied to various exercise equipment.

9 is a view for explaining the principle of continuous weight control of the exercise device 10 of FIG. 1. 3, 5 and 9, when the user rotates the adjustment handle 443 in one direction, by rotating the rotating plate 442 and the screw portion 441, the screw portion 441 and the screw coupling direction Accordingly, the moving shaft 430 may be moved away from the driving unit 440. In this case, the first contact member 410 pushes the first plate 110 toward the second plate 120 so that the first plate 110 and the second plate 120 are close. Therefore, the area around the first pulley 100 of the belt 300 is moved to a position distant from the rotation center of the first pulley 100 along the first inclined surface 111 and the second inclined surface 121. Conversely, the second contact member 420 is moved in a direction away from the fourth plate 220, and the third plate 210 and the fourth plate 220 are separated from each other by the second elastic member 202. . Therefore, the area around the second pulley 200 of the belt 300 is moved to a position close to the center of rotation of the second pulley 200 along the third inclined surface 211 and the fourth inclined surface 221.

Alternatively, when the user rotates the adjustment handle 443 in the opposite direction to the one direction, the moving shaft 430 may be closer to the driving unit 440 on the same principle as the above-described principle. In this case, the first contact member 410 is moved away from the first plate 110, and the first plate 110 and the second plate 120 are moved away from each other by the first elastic member 102. . Therefore, the area around the first pulley 100 of the belt 300 is moved to a position close to the center of rotation of the first pulley 100 along the first inclined surface 111 and the fourth inclined surface 221. On the contrary, the second contact member 420 pushes the fourth plate 220 in the direction of the third plate 210 so that the third plate 210 and the fourth plate 220 are close. Therefore, the area around the second plate 120 of the belt 300 is moved to a position distant from the rotation center of the second pulley 200 along the third inclined surface 211 and the fourth inclined surface 221.

As such, the weight 500 transferred to the handle 600 as the ratio between the rotation radius of winding the first pulley 100 of the belt 300 and the rotation radius of winding the second pulley 200 changes according to the user's control The lifting force can be continuously adjusted. Therefore, the exercise apparatus according to an embodiment of the present invention can increase the exercise effect through fine weight control and prevent injury due to excessive weight and excessive weight increase.

The above detailed description is to illustrate the present invention. In addition, the above-described content is to describe and describe preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications and environments. That is, it is possible to change or modify the scope of the concept of the invention disclosed herein, the scope equivalent to the disclosed contents, and / or the scope of the art or knowledge in the art. The embodiments described describe the best conditions for implementing the technical spirit of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Accordingly, the detailed description of the invention is not intended to limit the invention to the disclosed embodiments. In addition, the appended claims should be construed to include other embodiments.

10: exercise equipment 100: first pulley
102: first elastic member 110: first plate
111: first slope 120: second plate
121: second slope 200: second pulley
202: second elastic member 210: third plate
211: 3rd slope 220: 4th plate
221: fourth slope 300: belt
301, 302: slope 400: radius adjustment unit
410: first contact member 411: first moving plate
420: second contact member 421: second moving plate
430: moving shaft 440: drive unit
441: screw 442: rotating plate
443: adjustment handle 500: heavy
600: handle

Claims (10)

A first pulley rotatably provided around a first axis;
A second pulley rotatably provided around a second axis parallel to the first axis;
A belt winding the first pulley and the second pulley;
It includes a radius adjusting unit for adjusting the radius of winding the first pulley and the radius of the second pulley of the belt,
The first pulley includes a first plate and a second plate in which the belt is wound between one side facing each other,
The second pulley includes a third plate and a fourth plate in which the belt is wound between one side facing each other,
A first inclined surface inclined in the rotational center direction is formed on the one surface of the first plate toward the second plate along the circumferential direction,
A second inclined surface inclined in the rotational center direction is formed on the one surface of the second plate toward the first plate along the circumferential direction,
A third inclined surface inclined in the rotational center direction is formed on the one surface of the third plate toward the fourth plate along the circumferential direction,
A fourth inclined surface inclined in the rotational center direction is formed on the one surface of the fourth plate toward the third plate along the circumferential direction,
Both side ends of the belt are provided to contact the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface,
The radius adjustment unit adjusts the distance between the first plate and the second plate, and the distance between the third plate and the fourth plate,
The first plate and the third plate are provided at positions corresponding to each other,
The second plate and the fourth plate are provided at positions corresponding to each other,
The first plate is provided to be movable along the first axis,
The fourth plate is provided to be movable along the second axis,
The radius adjustment unit moves the first plate and the fourth plate,
The radius adjustment unit,
A first contact member in contact with the opposite surface of the one surface of the first plate;
A second contact member contacting an opposite surface of the one surface of the fourth plate;
A moving axis in which a longitudinal direction is provided parallel to the first axis and the second axis, and connected to the first contact member and the second contact member;
An exercise device comprising a driving unit for moving the moving shaft along the longitudinal direction.
According to claim 1,
A first line wound around the first axis;
A second line wound around the second axis;
A heavy object connected to the end of the first line;
Further comprising a handle connected to the end of the second line,
The first line and the second line are exercise devices provided that the first axis and the second axis are rotated in the same direction to each other, one is wound and the other is released. delete According to claim 1,
Between the first plate and the second plate is provided a first elastic member for applying a force in a direction away from the first plate and the second plate,
An exercise device provided between the third plate and the fourth plate is a second elastic member that applies a force in a direction in which the third plate and the fourth plate are spaced apart from each other. The method of claim 4,
An exercise device provided with bearings on a surface of the first contact member facing the first plate and a surface of the second contact member facing the fourth plate. The method of claim 5,
The first contact member includes a first moving plate whose central portion penetrates the first axis and is provided to be movable along the first axis,
The second contact member includes a second moving plate whose central portion penetrates the second axis and is provided to be movable along the second axis,
The bearings are respectively provided along the circumferential direction of the first moving plate and the circumferential direction of the second moving plate. The method of claim 4,
The driving unit is a movement mechanism including a screw portion screwed to the end of the moving shaft. The method of claim 7,
The driving unit further comprises a rotating plate connected to the side of the screw portion in a toothed gear manner,
The rotating plate is provided with a larger diameter than the threaded portion,
An exercise device provided with an adjustment handle protruding outward on one surface of the rotating plate. The method of claim 8,
The radius adjustment unit further comprises a graduation member indicating the position of the adjustment handle along the rotation path of the adjustment handle. According to claim 1,
The inclination of the first inclined surface and the third inclined surface is the same,
The inclination of the second inclined surface and the fourth inclined surface is the same,
An exercise device having inclined surfaces having inclinations corresponding to inclinations of the first inclined surface and the third inclined surface, and inclined surfaces having inclinations corresponding to inclinations of the second inclined surface and the fourth inclined surface, respectively, on both side ends of the belt. .

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