Freewheel adjustable wheel and exercise bicycle with freewheel adjustable wheel

Abstract

Disclosed is a freewheel adjustable wheel and a fitness bicycle having the same, characterized in that the freewheel adjustable wheel can be switched between a freewheel mode and a non-freewheel mode in a fitness bicycle and can guide through a gear engaged by magnetic force when operated in the freewheel mode and the non-freewheel mode.

Description

Technical Field

[0001] This disclosure relates to a freewheel adjustable wheel for adjusting the position of a moving gear unit that transmits power by using magnetic force, and to an exercise bike having a freewheel adjustable wheel. Background Technology

[0002] Typically, indoor exercise equipment for increasing muscle strength, weight training equipment for increasing muscle strength, and aerobic exercise equipment for improving cardiovascular function are widely used as fitness equipment.

[0003] Aerobic exercise equipment is mainly divided into treadmills that allow users to walk or run on a circular track, exercise bikes that allow users to rotate pedals to strengthen leg muscles, and cardio exercise equipment that provides the effect of climbing stairs.

[0004] Exercise bikes are installed in a designated location and are used to exercise by rotating the wheels through the action of pedaling. These exercise bikes can be divided into rotary bikes that allow for rotational exercises and indoor bikes, such as regular bikes, that rotate the wheels by rotating the pedals in a forward direction.

[0005] The freewheel structure used in indoor bicycles is configured to transmit power to the wheels only when the pedals are turned in the forward direction, and not when the pedals are turned in the reverse direction.

[0006] Prior art 1 disclosed herein is disclosed in Korean Patent Registration No. 10-1641429B1 (granted on July 14, 2016, publication title: Spinning bike).

[0007] The rotary bicycle of the prior art has a non-free wheel structure due to the exercise characteristics of pedaling, while ordinary indoor bicycles have a free wheel structure.

[0008] The non-freewheel structure used in rotary bicycles is configured to transmit power to the wheel to rotate the wheel when the pedal is rotated forward and when the pedal is rotated backward.

[0009] However, the power transmission structure of the rotary bicycle in the prior art 1 differs from that of the indoor bicycle. Therefore, when rotary exercise and bicycle exercise are performed alternately, there is a problem of increased purchase costs for exercise equipment due to the need to purchase a rotary bicycle and an indoor bicycle separately.

[0010] In addition, since the prior art 1 does not have a separate device for guiding and avoiding hot gear engagement when operating in freewheel mode and non-freewheel mode, it has the disadvantage of increased gear wear.

[0011] Furthermore, since the prior art 1 does not have a separate sensor for sensing gear motion when operating in freewheel mode or non-freewheel mode, there is another drawback: reduced operational reliability.

[0012] Prior art 2 is Korean Patent Registration No. 10-1641429B1 (granted on July 14, 2016, published as: Spinning bike, in which electricity is generated from a generator during bicycle movement).

[0013] In prior art 2, a permanent magnet is mounted on a rotating wheel, and a coil component is mounted on a ring having a shape surrounding the rotating wheel. Therefore, electricity is generated when the rotating wheel rotates, thus saving power.

[0014] However, prior art 2 does not include a separate power transmission device for switching between non-freewheel and freewheel modes. Another drawback is that when rotational and cycling exercises are alternated, the cost of the exercise equipment increases because separate purchases of the rotational bike and indoor bike are required.

[0015] In addition, the prior art 2 has a magnet mounted on the rotating wheel. However, this magnet is used to generate electricity. When switching between non-free wheel mode and free wheel mode, the prior art 2 does not have a separate device to guide the engagement of the gears. Therefore, there is also the disadvantage of increased wear on the gears.

[0016] Prior art 3 is Korean Utility Model Registration Publication No. 20-0472220Y1 (Publication Title: Joint structure of toy), which makes it easy to install and remove gears by using magnets.

[0017] In the prior art 3, a first gear is formed in a first rotating body along the outer surface of an insertion slot in the circumferential direction. A second gear is formed in a second rotating body along the outer surface of an insertion slot in the circumferential direction.

[0018] In the prior art 3, magnets are disposed at the center of each of the first and second gears, so that the gears can be connected to each other by magnetic force.

[0019] However, the magnet used in prior art 3 only guides the connection between the first and second gears by magnetic force, without preventing the ends of the teeth from protruding sharply and colliding with each other when the gears engage. Therefore, there is also the disadvantage of increased gear wear. Summary of the Invention

[0020] Technical issues

[0021] Therefore, one object of this disclosure is to provide a freewheel adjustable wheel that can be switched between freewheel mode and non-freewheel mode in an exercise bike, and an exercise bike having a freewheel adjustable wheel.

[0022] Another object of this disclosure is to provide a freewheel adjustable wheel that can be guided by a magnetically engaged gear when operating in freewheel mode and non-freewheel mode, and an exercise bike having a freewheel adjustable wheel.

[0023] Another object of this disclosure is to provide a freewheel adjustable wheel and an exercise bike having a freewheel adjustable wheel, the freewheel adjustable wheel including gear units that are rotatable when engaged with each other to avoid collision between the tips of the gear teeth.

[0024] Another object of this disclosure is to provide a freewheel adjustable wheel and an exercise bike having the freewheel adjustable wheel, the freewheel adjustable wheel including a separate sensor configured to sense gear movement when operating in freewheel mode and non-freewheel mode.

[0025] Another object of this disclosure is to provide a freewheel adjustable wheel that can selectively use the freewheel function via a motor drive, and an exercise bike having a freewheel adjustable wheel.

[0026] The aspects of this disclosure are not limited to those described above, and other aspects and advantages not mentioned above will become apparent from the following description, and will be further understood from the embodiments set forth herein. Furthermore, the aspects and advantages of this disclosure can be realized by means of the means and combinations thereof described in the appended claims.

[0027] Technical solution

[0028] To achieve the above objectives, a freewheel adjustable wheel is characterized by being able to switch between freewheel mode and non-freewheel mode in an exercise bike, and an exercise bike having a freewheel adjustable wheel.

[0029] Specifically, the moving gear can be moved vertically by the operation of the drive unit, and the rotation of the clutch gear and the rotation of the clutch hub can be synchronized, thereby adjusting the freewheel mode and the non-freewheel mode.

[0030] Furthermore, this disclosure is characterized by providing a gear position adjustment unit to guide the gears engaged by magnetic force when operating in freewheel mode and non-freewheel mode.

[0031] Specifically, a first adjustment unit including magnetic force can be disposed in a first gear with restricted rotation, and a second adjustment unit including magnetic force can be disposed in a second gear with rotatable rotation. Therefore, the second gear can be guided to rotate by magnetic force, and phenomena such as tooth jamming can be prevented.

[0032] The first adjustment unit may be disposed along the outer periphery of the first connecting gear disposed in the first gear, and may include magnetic force. The second adjustment unit may be disposed facing the first adjustment unit and along the outer periphery of the second gear disposed in the moving gear, and may also include magnetic force. The first and second adjustment units may use attractive or repulsive forces to adjust the engagement position of the second gear and the first gear.

[0033] Furthermore, this disclosure is characterized in that, when the gears are engaged in freewheel mode and non-freewheel mode, the gears can be rotatably mounted and gear teeth engagement is avoided.

[0034] Specifically, the second gear, which engages with the first gear, can move vertically via the inner moving unit, and a connecting bearing can be positioned between the second gear and the inner moving unit to freely rotate the second gear. Therefore, when the teeth of the second gear are about to collide with each other, the second gear moving towards the first gear can rotate, thus preventing tooth engagement.

[0035] Furthermore, this disclosure is characterized by providing a protrusion detection sensor for detecting gear movement when the gear is operating in freewheel mode and non-freewheel mode.

[0036] Specifically, a sensing target protrusion can be provided in a movable gear that moves in the axial direction to engage with the first gear, and a protrusion detection sensor can be provided to detect the movement of the sensing target protrusion, thereby detecting the movement of the sensing target protrusion in both freewheel mode and non-freewheel mode.

[0037] The sensing target protrusion may include a first protrusion extending from an internal gear disposed in a moving gear and a second protrusion extending from the internal gear, the second protrusion being longer than the first protrusion.

[0038] The protrusion detection sensor may include: a first sensor mounted on the movement path of a first protrusion and detecting the movement of the first protrusion; and a second sensor mounted on the movement path of a second protrusion and detecting the movement of the second protrusion.

[0039] Furthermore, this disclosure is characterized by selectively using freewheel mode and non-freewheel mode by using the rotational power of the drive unit.

[0040] Specifically, when the outer rotating gear rotates under the power of the drive unit, the inner gear inside the outer rotating gear can engage with the outer rotating gear to move in the axial direction. The second gear disposed in the inner gear can engage with the first gear connected to the inner housing, so that the power of the rotating gear that rotates together with the pedal unit can be transmitted to the inner housing through the inner gear and the first gear.

[0041] The rotating gear can receive power from the pedal unit to rotate, and the gear can be set along the outer periphery.

[0042] The fixed housing can rotatably support the rotating gear.

[0043] The inner housing can receive the power from the rotating gear and can be rotatably connected to the fixed housing.

[0044] The clutch bearing can be positioned between the rotating gear and the inner housing, and can transmit power when the rotating gear rotates in the forward direction.

[0045] The first gear may have a shape in which one side is fixed to the inner housing and the other side surrounds the outer surface of the clutch bearing, and may receive power through the clutch bearing.

[0046] The drive unit can be fixed to the fixed housing and provide rotational power.

[0047] The moving gear can be moved by the power of the drive unit and operates in a non-free wheel mode engaged with the first gear and a free wheel mode spaced apart from the first gear.

[0048] Additionally, the movable gear may include: an internal gear that engages with a splined gear disposed in a rotating gear to rotate together, and transmits power while the rotating gear moves in the axial direction and engages with a first gear; and an external rotating gear disposed on the outer surface of the internal gear, and moves the internal gear in the axial direction of the rotating gear by the operation of rotating it with power transmitted from the drive unit.

[0049] The internal gear may include: a second gear that receives power from a splined gear to receive power from a rotating gear and moves toward a first gear to engage with the first gear; an internal moving gear disposed between the second gear and the outer rotating gear, the internal moving gear including a helical gear engaging with the inner surface of the outer rotating gear and moving by the rotation of the outer rotating gear to move the second gear in the axial direction; and a guide rod having a rod shape fixed to a fixed housing and restricting the rotation of the internal moving gear and guiding the axial movement of the internal moving gear.

[0050] The second gear may include: a second gear body extending in an annular shape, in which a linear gear engaging with a splined gear is disposed along the inner circumference; a second connecting gear having a plurality of teeth formed along the outer circumference of the second gear body facing the first gear; and a connecting bearing disposed between the second gear and the inner moving gear.

[0051] The second gear can rotate in the circumferential direction and is connected to the gear position adjustment unit to rotate by magnetic force.

[0052] The gear position adjustment unit can be installed in each of the first gear and the moving gear, and the position of the first gear and the moving gear engaging with each other can be adjusted by magnetic force.

[0053] The gear position adjustment unit may include: a first adjustment unit disposed in a first gear and including magnetic force; and a second adjustment unit disposed in a second gear, facing the first adjustment unit, and including magnetic force.

[0054] The first adjustment unit and the second adjustment unit can adjust the rotational position of the first gear and the second gear by the repulsive force or attractive force that engages with each other.

[0055] The first adjustment unit may include a plurality of first magnets connected to a first gear and arranged along the circumference of a first connecting gear that engages with a second gear.

[0056] The second adjustment unit may include a plurality of second magnets connected to a second gear and arranged along the circumference of a second connecting gear that engages with a first gear.

[0057] The first gear may include: a first gear body surrounding the outer surface of the clutch bearing and fixed to the inner housing; and a first connecting gear forming a gear at one end of the first gear body facing the moving gear and engaging with a second connecting gear disposed in the moving gear.

[0058] The exercise bicycle according to this disclosure may include: a frame unit supporting a saddle and handlebars; a pedal unit disposed in a turntable on a side surface of the frame unit; a rotating gear that rotates by power transmitted from the pedal unit and is rotatably connected to an outer surface of a shaft, and has a spline gear disposed on the outer surface; a fixed housing that rotatably supports the rotating gear, the rotation of the fixed housing being restricted; an inner housing that rotates by power transmitted from the rotating gear and is rotatably connected to the fixed housing; a clutch bearing disposed between the rotating gear and the inner housing, and transmitting power when the rotating gear rotates in the forward direction; a first tooth. The system comprises: a first gear having one side fixed to the inner housing and the other side surrounding the outer surface of the clutch bearing, and receiving power through the clutch bearing; a drive unit fixed to the fixed housing and providing rotational power; a moving gear moved by the power of the drive unit and operating in a non-free wheel mode engaged with the first gear and a free wheel mode spaced apart from the first gear; a gear position adjustment unit disposed in each of the first gear and the moving gear, and adjusting the engagement position of the first gear and the moving gear with each other by magnetic force; and a protrusion detection sensor disposed in the fixed housing and detecting the movement of the moving gear.

[0059] The gear position adjustment unit may include: a first adjustment unit disposed in a first gear and having magnetic force; and a second adjustment unit disposed in a movable gear, facing the first adjustment unit, and having magnetic force.

[0060] The first adjustment unit may include a plurality of first magnets connected to a first gear and arranged along the circumference of a first connecting gear that engages with a moving gear.

[0061] The second adjustment unit may include a plurality of second magnets connected to a movable gear and arranged along the circumference of a second connecting gear that engages with the first gear.

[0062] The movable gear may include: an internal gear that engages with a splined gear disposed in a rotating gear to rotate together and transmits power while moving in the axial direction of the rotating gear and engaging with a first gear; an external rotating gear disposed on the outer surface of the internal gear and causing the internal gear to move in the axial direction of the rotating gear by rotational operation of power transmitted from the drive unit; and a sensing target protrusion having a protrusion protruding from the internal gear and detected by a protrusion detection sensor.

[0063] Beneficial effects

[0064] Based on freewheel adjustable wheels and exercise bikes including freewheel adjustable wheels, the operation switching between freewheel mode and non-freewheel mode is performed in an exercise bike, thereby reducing the purchase cost of fitness equipment.

[0065] In addition, the engagement position of the first gear and the second gear can be adjusted by a gear position adjustment unit with magnetic force, thereby sufficiently reducing gear wear and lowering maintenance costs.

[0066] Furthermore, the second gear that engages with the first gear can be rotatably connected, which prevents the teeth of the first gear and the second gear from engaging with each other, thereby reducing maintenance costs.

[0067] In addition, the protrusion detection sensor can detect the movement of the sensing target protrusion set in the moving gear, making it easy to detect gear movement when operating in freewheel mode and non-freewheel mode, thereby increasing operational reliability.

[0068] In addition, the freewheel function can be selectively used by operating the moving gear, which is moved by the operation of the drive unit, thereby improving the usability of the fitness equipment.

[0069] The specific effects, as well as the effects described above, are described in the detailed description section. Attached Figure Description

[0070] Figure 1 This is a perspective view of an exercise bike including a freewheel adjustable wheel according to one embodiment;

[0071] Figure 2 This is a front view showing the state in which a freewheel adjustable wheel according to an embodiment of the present disclosure is installed in an exercise bike;

[0072] Figure 3 This is a perspective view showing a freewheel adjustable wheel according to an embodiment of the present disclosure;

[0073] Figure 4 This is a cross-sectional view showing a freewheel adjustable wheel according to an embodiment of the present disclosure;

[0074] Figure 5 This is an exploded perspective view showing a freewheel adjustable wheel according to an embodiment of the present disclosure;

[0075] Figure 6 This is a perspective view showing the movable gear unit and drive unit installed in a second fixed housing according to an embodiment of the present disclosure;

[0076] Figure 7 This is an exploded perspective view showing a first gear and a second gear according to an embodiment of the present disclosure;

[0077] Figure 8 This is a perspective view showing a moving gear unit, a power transmission unit, and a drive unit according to an embodiment of the present disclosure;

[0078] Figure 9 This is a cross-sectional perspective view of a freewheel adjustable wheel according to an embodiment of the present disclosure;

[0079] Figure 10 This is a cross-sectional view of a freewheel adjustable wheel according to an embodiment of the present disclosure;

[0080] Figure 11 This is a perspective view showing a first gear and a first adjusting unit according to an embodiment of the present disclosure;

[0081] Figure 12 This is a perspective view showing the internal gear portion and the second adjustment unit according to an embodiment of the present disclosure;

[0082] Figure 13 This is a perspective view showing a first adjustment unit and a second adjustment unit according to an embodiment of the present disclosure;

[0083] Figure 14 This is a perspective view showing the first gear and the second gear engaged with each other according to an embodiment of the present disclosure;

[0084] Figure 15 This is a front view showing the state in which the first and second sensors detect the sensing target protrusion according to an embodiment of the present disclosure; and

[0085] Figure 16 This is a front view showing a state in which only the second sensor detects the sensing target protrusion according to an embodiment of the present disclosure. Detailed Implementation

[0086] The above aspects, features, and advantages are described in detail below with reference to the accompanying drawings, enabling those skilled in the art to readily implement the technical spirit of this disclosure. In this disclosure, detailed descriptions of known technologies related to this disclosure are omitted if they unnecessarily obscure the key points of this disclosure. Preferred embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals may denote the same or similar components.

[0087] The terms "first," "second," etc., are used in this document only to distinguish one component from another. Therefore, components should not be limited by these terms. Of course, a first component can be a second component unless otherwise stated.

[0088] In the following text, the phrase "a component is disposed or arranged in the upper or lower part" may mean that a component is disposed or arranged to contact the upper or lower surface. This disclosure is not intended to limit the provision of other elements between components or on or below components.

[0089] It should be understood that when a component is said to be "connected" to another component, the component can be directly connected to the other component, or there may be an intermediate component. Conversely, when a component is said to be "directly connected" to another component, there is no intermediate component.

[0090] Throughout this specification, unless otherwise stated, each element may be singular or plural.

[0091] Singular representations may include plural representations unless their meaning is explicitly different from that in the context. Terms such as “comprising” or “having” are used herein and should be understood to indicate the presence of certain components, functions, or steps disclosed in the specification, and should also be understood to mean that more or fewer components, functions, or steps may be utilized.

[0092] Throughout this disclosure, the term “A and / or B” as used herein may mean A, B, or A and B, and the term “C to D” may mean C or greater and D or less, unless otherwise stated.

[0093] In the following, a freewheel adjustable wheel 200 and an exercise bike having a freewheel adjustable wheel according to embodiments of the present disclosure will be described.

[0094] Figure 1 This is a perspective view of an exercise bike including a freewheel adjustable wheel 200 according to an embodiment of the present disclosure. Figure 2 This is a front view showing the state in which a freewheel adjustable wheel according to an embodiment of the present disclosure is installed inside an exercise bike.

[0095] like Figure 1 and Figure 2 As shown, the exercise bike according to an embodiment of the present disclosure has a motion that switches between freewheel mode and non-freewheel mode by using the operation of the drive unit 280 of the motor.

[0096] When the two gears are engaged in non-freewheel mode by operating the gear position adjustment section located in the exercise bike, the gears can rotate magnetically, thus preventing the gear teeth from colliding with each other.

[0097] Because it uses n one-way clutch bearings to transmit power only during forward rotation and not in reverse, the exercise bike can transmit power only during forward rotation. Therefore, when the exercise bike is operating in freewheel mode, power transmission is performed only through clutch bearing 260, which will be described later.

[0098] Since power is transmitted to the inner housing 250 even during the reverse rotation of the pedal unit 40 by engaging the moving gear unit 300, which is moved by the drive unit 280, with the first gear 270, the exercise bike can operate in non-freewheel mode.

[0099] When the bicycle is operated in freewheel mode, power transmission is performed through the clutch bearing 260 and low-noise drive can be achieved.

[0100] When the exercise bike is operating in non-freewheel mode, the second gear 320 located in the moving gear unit 300 can engage with the first gear 270 fixed to the inner housing 250 to transmit power.

[0101] The exercise bike can be modified in various ways within the technical scope of controlling freewheel mode operation and non-freewheel mode operation, because the moving gear unit 300 moves via the operation of the drive unit 280. The freewheel adjustable wheel 200 can be installed inside the exercise bike, and the drive unit 280 can be installed inside the freewheel adjustable wheel 200.

[0102] The exercise bike according to embodiments of the present disclosure may include at least one of a frame unit 10, a belt member 20, a disc unit 30, a pedal unit 40, a swivel support shaft 50, a base 60, a seat housing 70, handlebars 80, a display 90, a seat post 100, a seat 110, and freewheel adjustable wheels 200.

[0103] When the pedal unit 40 rotates in the forward or reverse direction, the mode of the exercise bike according to the embodiments of the present disclosure can be easily switched between freewheel mode and non-freewheel mode by operating the drive unit 280.

[0104] The frame unit 10 supporting the saddle and handlebars 80 can be modified in various ways within the technical scope of forming the body of the exercise bike. According to embodiments of this disclosure, the frame unit 10 may include an outer frame 2, an inner frame 14, and side frames 16.

[0105] The outer frame 12 has openings on two open side surfaces and is mounted on the base 60 to be fixed to the seat pillar 100. Freewheel adjustable wheels 200, a rotating disc, and an inner disc are disposed within the outer frame 12.

[0106] The inner frame 14 can be disposed within the outer frame 12. The inner frame 14 can support the freewheel adjustable wheel 200 disposed within the frame unit 10. The inner frame 14 can have a shape with multiple connecting beam members. The inner frame 14 has one side fixed to the seat support 100 and the other side supporting the axle 220 of the freewheel adjustable wheel 200.

[0107] The side frame 16 can be attached to the two open sides of the outer frame 12. The side frame 16 can be plate-shaped and can be detachably attached to the two side surfaces of the outer frame 12 to facilitate the repair and replacement of parts inside the exercise bike.

[0108] Such a frame unit 10 can be formed into various structures according to the load distribution and structure of the exercise bike.

[0109] The rotating support shaft 50 can be disposed within the frame unit 10 and is arranged in a horizontal direction. The rotating support shaft 50 can be connected to a disk unit 30 having a disk shape. The disk unit 30 according to an embodiment of the present disclosure may include a rotating disk and an inner disk 34.

[0110] Both sides of the rotating support shaft 50 can be connected to the inner disk. According to an embodiment of this disclosure, both sides of the rotating support shaft 50 can be connected to the center of the inner disk.

[0111] A circular rotating disk 32 can be fixed to the outside of the inner disk 34, and the pedal unit 40 can be detachably connected to the edge of the rotating disk 32. The pedal unit 40 can be connected to the rotating disk 32 and forms a right angle with the rotating disk 32. Therefore, when the user steps on the pedal unit 40, the rotating disk and the inner disk rotate relative to the rotation support shaft 50.

[0112] The rotating disk 32 can be formed in the shape of a circular panel. The side frame 16 can have a circular hole for mounting the rotating disk 32. Since the rotating disk 32 and the inner disk 34 are disposed in the circular hole provided in the side frame 16, the components disposed within the frame unit 10 can be shielded.

[0113] Therefore, it can prevent users, infants and companion animals from approaching the interior of the frame unit 10, and when the pedal unit 40 is rotated, it can prevent the pedal unit 40 and the components disposed in the frame from getting stuck in the pedal unit.

[0114] The belt member 20 can be disposed on the outer edge of the inner disc, and the rotation of the inner disc can cause the rotating gear 210 disposed in the freewheel adjustable wheel 200 to rotate. One side of the belt member 20 can be connected to the inner disc, and the other side can be connected to the pulley member 212 of the rotating gear 210.

[0115] The pedal unit 40 can be rotatably mounted to a rotating disk, which is mounted to the side surface of the frame unit 10. The pedal unit 40 can be mounted to the rotating disk by rotating it and fastening it into a fastening slot provided in the rotating disk 32.

[0116] The rotating support shaft 50 can pass through the center of the rotating disk 32 and the center of the inner disk 34, which are rotated by the pedal. The rotating disk 32 and the inner disk 34 can serve as drive wheels and can be connected to the pulley member 212 of the rotating gear 210 by means of a belt or chain, which will be described later. When the user presses the pedal unit 40, the rotating disk 32 and the inner disk 34 rotate. When the inner disk 34 rotates, the belt member 20 and the rotating gear 210 rotate.

[0117] The base 60 can be disposed at the bottom of the frame unit 10 to support the frame unit 10. The base 60 can be plate-shaped and spaced apart from the lower surface of the frame unit 10. The base 60 can be formed in various shapes.

[0118] The seat housing 70 is disposed along the upper surface of the base 60. The seat housing 70 has a square tube shape and extends upward from the base 60 to penetrate the interior of the frame unit 10. Furthermore, the frame unit 10 is fixed to the seat housing 70. Thus, the frame unit 10 can be mounted above the base 60 and spaced apart from the base 60.

[0119] The seat housing 70 can be tilted in the vertical direction of the frame unit 10. The seat housing 70 can be disposed between the rotary support shaft 50 and the shaft 220. The seat housing 70 can have the shape of a polygonal tube or a circular tube.

[0120] The handlebar 80 can be fixed to one side of the frame unit 10. A display 90 for easily checking the operating status of the exercise bike and exercise records can be mounted on the upper surface of the frame unit 10, adjacent to the handlebar 80.

[0121] The display 90 can be configured to output exercise information on the screen, such as the speed of the exercise bike, rotational load, etc.

[0122] A seat pillar 100 supporting the lower part of the seat 110 can be disposed on the upper surface of the seat housing 70. The seat pillar 100 can be installed inside the seat housing 70 for height adjustment. The seat pillar 100 can be fixed inside the seat housing 70. The cross-sectional area of ​​the seat pillar 100 can be formed in various ways based on the shape of the seat housing 70.

[0123] Since the seat support 100 is installed inside the seat housing 70 for height adjustment, the height of the seat 110 can be appropriately adjusted based on the user's height, physical condition, and exercise preferences.

[0124] In the exercise bike according to this disclosure, the freewheel adjustable wheel 200 can be positioned in the rear or front region relative to the swivel support axle 50. The shape of the frame unit 10 can be changed based on the position of the freewheel adjustable wheel 200. Additionally, the positions of the swivel support axle 50 and the shaft 220 can be changed.

[0125] Figure 3 This is a perspective view showing a freewheel adjustable wheel 200 according to an embodiment of the present disclosure. Figure 4 This is a cross-sectional view showing a freewheel adjustable wheel 200 according to an embodiment of the present disclosure. Figure 5 This is an exploded perspective view showing a freewheel adjustable wheel 200 according to an embodiment of the present disclosure.

[0126] like Figures 3 to 5 As shown, the freewheel adjustable wheel 200 may include at least one of the following: a rotating gear 210, a shaft 220, a fixed housing 240, a rotating housing 250, a clutch bearing 260, a first gear 270, a drive unit 280, a power transmission unit 290, a moving gear unit 300, a bearing unit 400, a gear position adjustment unit 500, a protrusion detection sensor 600, and a magnetic force generating unit 700.

[0127] When the mode changes from freewheel mode to non-freewheel mode, the moving gear unit 300 can move upward, and the second gear 320 disposed in the moving gear unit 300 can engage with the first gear 270 to transmit power. At this time, a magnet can be disposed on the first gear 270 and the second gear 320 to guide the rotation of the second gear 320 and to prevent the sharp parts of the gear teeth from colliding with each other.

[0128] By installing a gear position adjustment unit 500 with magnetic force, the teeth of the first gear 270 and the second gear 320 will not collide with each other and can be properly engaged.

[0129] The rotary gear 210 can be modified in various ways within the technical features of being rotatably coupled to the outer surface of the shaft 220. The rotary gear 210 may include a gear extending along the outer periphery in the axial direction.

[0130] The rotary gear 210 according to embodiments of the present disclosure may include a pulley member 212, a rotating body 214, and a spline gear 216.

[0131] The pulley member 212 can be connected to the belt member 20 and is configured to rotate in response to power transmitted from the pedal unit 40. Since the gears are arranged along the outer periphery of the pulley member 212, sliding of the pulley member 212 occurs on its outer surface. The pulley member 212 can be disposed outside the fixed housing 240 and provides power to the pedal unit 40 via the belt member 20.

[0132] The rotating body 214 may extend into the interior of the fixed housing 240 and may rotate together with the pulley member 212. The rotating body 214 according to an embodiment of the present disclosure may have a tubular shape.

[0133] The spline gear 216 can be fixed to the outer surface of the rotating body 214 and can be modified in various ways within the technical features that allow it to rotate together with the rotating body 214. According to one embodiment, the spline gear can be a gear coupled to or integrally formed with the outer surface of the rotating body 214, and can extend in the axial direction of the rotating body 214.

[0134] Since the gear is formed on the outer surface of the splined gear 216, the second gear 320 of the movable gear unit 300 can move along the splined gear 216 in the axial direction of the rotating gear 210.

[0135] The rotating gear 210 can be mounted in the fixed housing 240 and the inner housing 250 to rotate under the power of the pedal unit 40. A shaft 220 can be disposed within the rotating gear 210. Both sides of the shaft 220 can be non-rotatably connected to the inner frame 14. The rotating gear 210 can be mounted to the outside of the shaft 220. The rotating gear 210 can be configured to be concentric with the shaft 220. A shaft bearing 404 can be disposed between the shaft 220 and the rotating gear 210. Therefore, when the rotating gear 210 is rotated by the belt member 20, the shaft 220 can remain stationary.

[0136] Shaft 220 can be horizontally connected through the interior of rotating gear 210 and can be fixed to frame unit 10. Shaft 220 according to an embodiment of the present disclosure may have a rod shaft passing through the center of rotation of the housing.

[0137] The fixed housing 240 can be modified in various ways within the technical feature of rotatably supporting the rotating gear 210 while its rotation is restricted. The fixed housing 240 can be fixed to the frame unit 10 of the exercise bike, thereby restricting the rotation of the fixed housing 240, and the inner housing 250 can be rotatably mounted within the fixed housing 240.

[0138] The shaft 220 can be installed in the frame unit 10 after passing through the fixed housing 240 and the inner housing 250, and the rotating gear 210 can be disposed on the outer surface of the shaft 220. The rotating gear 210 can have a shape that penetrates the fixed housing 240 and the inner housing 250.

[0139] The fixing housing 240 according to embodiments of the present disclosure may include a first fixing housing 242 and a second fixing housing 245. The first fixing housing 242 and the second fixing housing 245 may have a shape that covers the outer surface of the inner housing 250, with the inner housing 250 inserted therebetween.

[0140] The magnetic force generating unit 700 can be disposed between the first fixed housing 242 and the second fixed housing 245. The magnetic force generating unit 700 can generate magnetic force on the rotational speed or rotational load of the inner housing 250, which includes iron.

[0141] The drive unit 280, the power transmission unit 290, and the moving gear unit 300 can be disposed in the second fixed housing 245.

[0142] Figure 6 This is a perspective view showing the state in which the moving gear unit 300 and the drive unit 280, according to an embodiment of the present disclosure, are installed within the second fixed housing 245. Figure 7 This is an exploded perspective view showing a first gear 270 and a second gear 320 according to an embodiment of the present disclosure.

[0143] The rotating housing 250 can rotate with the power transmitted from the rotating gear 210, and it can be modified in various ways within its technical feature of rotatably mounting onto the fixed housing 240. According to embodiments of the present disclosure, the rotating housing 250 can rotate with a first gear 270, which contacts a clutch bearing 260. Therefore, rotational power generated by forward rotation can be provided to the rotating housing 250 via the clutch bearing 260.

[0144] The rotating gear 210 and shaft 220 can be configured to pass through the center of the rotating housing 250. The rotating housing 250 can be axially connected to the rotating gear 210 and can rotate in both freewheel and non-freewheel modes. The rotating gear 210 can be connected to the rotation center of the rotating housing 250.

[0145] When the rotating gear 210 rotates forward in freewheel mode, the rotating housing 250 can also rotate forward. When the rotating gear 210 rotates in reverse, the rotating housing 250 may not rotate. In freewheel mode, when the rotating gear 210 rotates in reverse, the rotating housing 250 may not rotate and the rotating gear 210 may idle within the rotating housing 250.

[0146] In non-freewheel mode, the rotating housing 250 can rotate when the rotating gear 210 can rotate in either the forward or reverse direction. Since the power input through the rotating gear 210 is transmitted to the first gear 270 through the moving gear unit 300 in non-freewheel mode, the rotating housing 250 and the rotating gear 210 can rotate together.

[0147] The second fixed housing 245 of the fixed housing 240 can support the drive unit 280 and can be installed in the opening of the rotating housing 250. The second fixed housing 245 can be modified in various ways within the technical features of having a shape that seals the opening of the rotating housing 250 and restricting its rotation.

[0148] The rotating housing 250 can be integrally formed in a disc shape. The rotating gear 210 can pass through the center of the rotating housing 250. The outer casing for some areas surrounding the rotating housing 250 can be formed along the circumference of the rotating housing 250.

[0149] The wheel bearing 402 can be disposed between the second fixed housing 245 and the rotating housing 250. When the rotating housing 250 rotates under a state where the rotation of the fixed housing 240 is restricted, the wheel bearing 402 disposed between the rotating housing 250 and the fixed housing 240 can reduce friction.

[0150] The clutch bearing 260 can be disposed between the rotating gear 210 and the rotating housing 25. When the rotating gear 210 rotates in the forward direction, the clutch bearing can be modified in various ways within the technical features of transmitting power to the rotating housing 250.

[0151] A circular seat groove may be formed at the center of the rotating housing to allow the clutch bearing 260 to be seated thereon. The seat groove may be concentric with the rotating gear 210 and the rotating housing 250. The clutch bearing 260 may be a one-way bearing, allowing only unidirectional rotation of the rotating gear 210. When the rotating gear 210 rotates forward, the clutch bearing 260 can transmit power to the first gear 270 fixed to the rotating housing 250, causing the rotating gear 210 and the rotating housing 250 to rotate together. When the rotating gear 210 rotates in the reverse direction, only the rotating gear 210 can rotate, without transmitting power to the rotating housing 250.

[0152] Since the clutch bearing 260 causes the rotating housing 250 to rotate only when the rotating gear 210 rotates in the forward direction, a freewheel mode of the rotating housing 250 can be enabled. The clutch bearing 260 may have a structure in which a bearing (not shown) is inserted between an inner race (not shown) and an outer race (not shown). When the clutch bearing 260 rotates in the forward direction, the bearing can rotate together as a whole by restricting the inner race and the outer race.

[0153] Figure 11 This is a perspective view showing a first gear 270 and a first adjustment unit 510 according to an embodiment of the present disclosure.

[0154] like Figure 11 As shown, the first gear 270 may have a shape in which one side is fixed to the rotating housing 250 and the other side surrounds the outer surface of the clutch bearing 260. When the rotating gear 210 rotates in the forward direction, the first gear 270 can provide rotational power through the clutch bearing 260.

[0155] The forward rotation of the rotary gear 210 refers to when Figure 1 The pedal unit 40 shown rotates clockwise.

[0156] According to embodiments of the present disclosure, the first gear 270 may include a first gear body 272 and a first connecting gear 274. The first gear body 272 may be fixed to the rotating housing 250 and surround the outer surface of the clutch bearing 260. One end of the first gear body 272 may be fixed to the inner housing 250, and the other end may extend toward the second gear 320, as will be described below. The first gear body 272 may be configured to contact the outer surface of the clutch bearing 260 and may be provided with rotational power by the clutch bearing 260 to rotate together with the rotating housing 250.

[0157] The first connecting gear 274 may be formed at one end of the first gear body 272 facing the moving gear unit 300, and may engage or be spaced apart from the second connecting gear 326 disposed in the moving gear unit 300. The first connecting gear 274 may be formed as a circumferentially shaped gear. In addition, the teeth of the first connecting gear may have a shape that is inclined in one direction of rotation.

[0158] The second gear 320 and the second connecting gear 326 that engage with the first connecting gear 274 can form a gear.

[0159] Therefore, when the rotating gear 210 rotates in the opposite direction, the first connecting gear can form a gear with a circumferential shape. In addition, the teeth of the second connecting gear can have a shape that is inclined in the other direction of rotation to engage with the first connecting gear 274.

[0160] Figure 8 This is a perspective view showing a moving gear unit 300, a power transmission unit 290, and a drive unit 280 according to an embodiment of the present disclosure.

[0161] like Figure 8 As shown, the drive unit 280 can be fixed to the fixed housing 240 and can be modified in various ways within the technical features that provide rotational power and move the moving gear unit 300. The drive unit 280 according to embodiments of this disclosure may include a drive body 282 and an output shaft 284. Additionally, a power gear 286 may be mounted circumferentially on the output shaft 284.

[0162] The drive body 282 can use a motor, and the output shaft 284, protruding outside the drive body 282, can be rotated by the operation of the drive body 282. A power gear 286, disposed along the outer periphery of the output shaft 284, can extend annularly and may include a linear gear 324 extending longitudinally along the output shaft 284. The power gear 286, rotating with the output shaft 284, can engage with the gears of the power transmission unit 290.

[0163] The internal gear 310 of the moving gear unit 300 can move vertically by operating the drive unit 280. Since the moving gear unit 300 transmits power from the power gear 286, which rotates via the drive unit 280, to the first gear 270, causing the rotating housing 250 to rotate, the freewheel mode and the non-freewheel mode can be adjusted. Furthermore, users do not need to purchase separate fitness equipment based on the freewheel mode or the non-freewheel mode, thus reducing the cost of purchasing fitness equipment.

[0164] The power transmission unit 290 can be modified in various ways within its technical feature of rotating the external rotating gear 360 disposed in the moving gear unit 300 by transmitting the power of the drive unit 280 to the external rotating gear 360.

[0165] The power transmission unit 290 can transmit power from the drive unit 280 to the external rotating gear 360 via multiple gears. According to embodiments of this disclosure, the power transmission unit 290 may include a first transmission gear 292 and a second transmission gear 294.

[0166] The first transmission gear 292 can be a gear that rotates simultaneously with the power gear 286 disposed in the drive unit 280, and gears with different diameters can be configured in two stages. The second transmission gear 294 can engage with the main gear 362 disposed outside the outer rotating gear 360 and the first transmission gear 292, and can transmit the power of the first transmission gear 292 to the main gear 362.

[0167] Figure 9 This is a cross-sectional perspective view of a freewheel adjustable wheel 200 according to an embodiment of the present disclosure. Figure 10 This is a cross-sectional view of a freewheel adjustable wheel 200 according to an embodiment of the present disclosure. Figure 12 This is a perspective view showing the internal gear 310 and the second adjustment unit 520 according to an embodiment of the present disclosure.

[0168] like Figures 8 to 12 As shown, the movable gear unit 300 can be moved by the power of the drive unit 280 and can operate in non-free wheel mode and free wheel mode. In non-free wheel mode, the movable gear unit 300 engages with the first connecting gear 274 of the first gear 270. In free wheel mode, the movable gear unit 300 is separated from the first connecting gear 274.

[0169] When the moving gear unit 300 becomes spaced apart from the first connecting gear 274, the power for forward rotation of the pedal unit 40 can be transmitted to the inner housing 250 via the rotating gear 210, clutch bearing 260, and first gear 270, causing the inner housing 250 to rotate. The power for reverse rotation of the pedal unit 40 can only rotate the splined gear 216 and the second gear 320; therefore, rotational power is not transmitted to the inner housing 250. Thus, only when the rotating gear 210 rotates forward can the rotation of the clutch bearing 260 be synchronized with the rotation of the inner housing 250, allowing the freewheel adjustable wheel 200 to be driven in freewheel mode.

[0170] Furthermore, when rotation is synchronized by engaging the first connecting gear 274 of the moving gear unit 300 with the first connecting gear 274 of the first gear 270, the freewheel adjustable wheel 200 can be driven in non-freewheel mode. In non-freewheel mode, the power of the pedal unit 40 can be transmitted in the sequence of the rotating gear 210, the spline gear 216, the second gear 320 of the internal gear 310, the first gear 270, and the rotating housing 250.

[0171] The moving gear unit 300 according to embodiments of the present disclosure may include an internal gear 310, an external rotary gear 360, and a sensing target protrusion 390.

[0172] The internal gear 310 can engage with the splined gear 216 disposed in the rotating gear 210 to rotate together with the rotating gear 210. Furthermore, the internal gear 310 can provide power to the drive unit 280 and move along the splined gear 216 in the axial direction of the rotating gear 210, which is a linear direction. The internal gear including the second gear 320 can be modified in various ways within its technical feature of engaging with the first gear 270 to transmit power.

[0173] The second gear 320 can engage with the splined gear 216 and receive power from the rotating gear 210. The second gear 320 can be disposed outside the splined gear 26 and move in a linear direction along the splined gear 216. The second gear 320 can move toward the first gear 270 to engage with the first gear 270 or move to be spaced apart from the first gear 270.

[0174] The second gear 320 according to embodiments of the present disclosure may include a second gear body 322, a linear gear 324, and a second connecting gear 326.

[0175] The second gear body 322 may extend annularly, and the linear gear 324 that engages with the spline gear 216 may be disposed along its inner circumference. The second gear body 322 may have a tubular shape and may be disposed outside the spline gear 216. The linear gear 324 may be disposed along the inner circumference of the second gear body 322 and may be coupled to the outer surface of the spline gear 216.

[0176] The second connecting gear 326 may have teeth formed along the outer periphery of the first connecting gear 274 facing the second gear body 322. The second connecting gear 326 may be formed at one end of the second gear body 322 and continuously arranged along the circumferential surface.

[0177] The connecting bearing 340 can be disposed between the second gear 320 and the inner moving gear 330, and can guide the second gear 320 to rotate by magnetic force.

[0178] When the first connecting gear 274 and the second connecting gear 326 are spaced apart, the forward rotational power transmitted through the clutch bearing 260 can be transmitted to the inner housing 250 through the first gear 270. When the second connecting gear 326 is in contact with the first connecting gear 274, the reverse rotational power transmitted to the rotating gear 210 can be transmitted to the first gear 270 through the moving gear unit 300.

[0179] A groove may be provided for providing a connecting bearing 340 along the outer periphery of the second gear body 322.

[0180] The second gear 320 can be rotatably connected in the circumferential direction and connected to the gear position adjustment unit 500 to rotate using magnetic force.

[0181] The inner moving gear 330 can be disposed between the second gear 320 and the outer rotating gear 360, and can be modified in various ways within the technical feature of moving the second gear 320 in the axial direction along the shaft 220.

[0182] The inner moving gear 330 may include a helical gear that engages internally with the outer rotating gear 360. The inner moving gear 330 may be moved by rotation of the outer rotating gear 360 to move the second gear 320 in the axial direction.

[0183] According to embodiments of the present disclosure, the inner moving gear 330 can be geared to the outer rotating gear 360, and can move in a linear direction together with the second gear 320 by the rotation of the outer rotating gear 360.

[0184] The rotation of the inner moving gear 330 can be limited by the guide rod 350, so that when the outer rotating gear 360 rotates, the inner moving gear 330 can move in a linear direction along the guide rod 350.

[0185] According to embodiments of the present disclosure, the inner moving gear 330 may include an inner moving body 332, an inner extension 334, and an outer moving gear 336.

[0186] The inner movable body 332 can extend circumferentially along the outer periphery of the second gear 320 and can be connected to the second gear 320 via a connecting bearing 340. The inner movable body 332 can be disposed on the outer surface of the second gear body 322 and can extend along the outer periphery of the second gear body 322.

[0187] The inner moving body 332 and the second gear body 322 can be connected by a connecting bearing 340, so that the second gear body 322 disposed in the inner moving body 332 can be rotatably connected.

[0188] The inner extension 334 can extend axially from the edge of the inner moving body 332. The inner extension 334 may have a tubular shape, and the outer moving gear 336 may be disposed on the outer surface of the inner extension 334 and the inner moving body 332.

[0189] The outer moving gear 336 may have a gear disposed on the outer surface of the inner extension 334 to engage with a gear disposed within the outer rotating gear 360. The outer moving gear 336 may have an external thread shape and may engage with the inner rotating gear 366 of the outer rotating gear 360.

[0190] A connecting bearing 340 can be disposed between the second gear 320 and the inner moving gear 330. Therefore, the second gear 320 and the inner moving gear 330 can move together in the axial direction of the shaft 220, and the second gear 320, which engages with the spline gear 216, can rotate together with the spline gear 216.

[0191] In addition, the rotation of the inner moving gear 330 can be limited by the guide rod 350, and its movement can be limited to the longitudinal direction of the guide rod 350.

[0192] The guide rod 350 can be fixed to the second fixed housing 245 of the fixed housing 240 and can have a rod shape. The guide rod 350 can be inserted into a groove provided in the inner moving gear 330 and can guide the linear movement of the inner moving gear 330. Multiple guide rods 350 can be provided, and multiple guide rods can pass through the inner moving body 332 or be inserted into a groove provided on the inner surface of the inner moving body 332 to limit the rotation of the inner moving body 332.

[0193] The rotation of the inner moving gear 330 can be restricted by the guide rod 350, and only its axial movement can be guided by the guide rod 350.

[0194] The outer rotary gear 360 may be disposed on the outer surface of the inner gear 310 and may be modified in various ways within the technical features of the inner gear 310, which is rotated by power transmitted from the drive unit 280 to move in the axial direction of the rotary gear 210. The outer rotary gear 360 according to embodiments of the present disclosure may include a main gear 362, a rotary gear body 364, and an inner rotary gear 366.

[0195] The main gear 362 can be connected to the power transmission unit 290 to provide power, and can include a gear disposed on the outer peripheral surface and extending in a ring shape.

[0196] The rotating gear body 364 can be fixed inside the main gear 362 and can have a shape surrounding the outer surface of the inner gear 310. The rotating gear body 364 can have a tubular shape and can be rotatably connected to the outer surface of the inner movable gear 330.

[0197] The inner rotating gear 366 can be formed to engage with the gear on the outer surface of the inner gear provided on the inner surface of the rotating gear body 364. The inner rotating gear 366 can engage with the outer moving gear 336, and the inner moving gear 330, whose rotation is limited by the rotation of the inner rotating gear 366, can move in a linear direction along the guide rod 350.

[0198] The sensing target protrusion 390 may have the shape of a protrusion projecting from an internal gear, and may be modified in various ways within the technical features of the sensing target protrusion 390 measured by the protrusion detection sensor 600. The sensing target protrusion 390 according to embodiments of the present disclosure may include a first protrusion 392 and a second protrusion 394.

[0199] The first protrusion 392 can protrude from the internal gear 310 and can be detected by the protrusion detection sensor 600.

[0200] The second protrusion 394 can protrude from the internal gear 310 and can be formed to be longer than the first protrusion 392 for detection by the protrusion detection sensor 600.

[0201] The first protrusion 392 and the second protrusion 394 can be arranged in parallel. When the first gear 270 is positioned above the internal gear 310, the first protrusion 392 and the second protrusion 394 can extend to the lower region of the internal gear 310.

[0202] The first protrusion 392 and the second protrusion 394 may extend along the direction of movement of the internal gear 310 and may have different lengths. The first protrusion 392 and the second protrusion 394 may have the shape of a hollow rectangular frame.

[0203] Meanwhile, in the freewheel adjustable wheel 200, the bearing unit 400 that rotatably supports the rotating component may include multiple bearings. According to embodiments of this disclosure, the bearing unit 400 may include a wheel bearing 402 and a shaft bearing 404.

[0204] The wheel bearing 402 can be disposed between the inner housing 250 and the fixed housing 240, thereby reducing friction between the fixed housing, which is restricted in rotation, and the inner housing, which performs rotation.

[0205] The shaft bearing 404 can be disposed between the shaft 220 and the rotating gear 210, and can reduce the friction generated during the rotation of the shaft 220.

[0206] Figure 13 This is a perspective view showing the first adjustment unit 510 and the second adjustment unit 520 according to embodiments of the present disclosure.

[0207] like Figures 10 to 13 As shown, the gear position adjustment unit 500 can be respectively disposed in the first gear 270 and the moving gear unit 300, and can be modified in various ways within the technical feature of adjusting the position of the first gear 270 and the moving gear unit 300 by magnetic engagement.

[0208] According to an embodiment, the gear position adjustment unit 500 may include a first adjustment unit 510 and a second adjustment unit 520. The first adjustment unit 510 and the second adjustment unit 520 may adjust the position of the second gear 320 to be engaged with the first gear 270 by using attractive or repulsive forces.

[0209] The gear position adjustment unit 500 can use a permanent magnet to provide a semi-permanent functional structure. The gear position adjustment unit 500 can rotate the second gear 320 by using a repulsive or attractive force, which is the magnetic force of the magnets attached to the first gear 270 and the second gear 320. Therefore, the ends of the gear teeth of the first gear 270 and the second gear 320 can be prevented from colliding with each other and being worn.

[0210] Since the first adjustment unit 510 and the second adjustment unit 520 have the same magnetic polarity, the repulsive force can cause the second gear 320 to rotate. For example, the magnetic polarity of the first adjustment unit 510 and the second adjustment unit 520 can be unified as N pole or S pole.

[0211] When the ends of the teeth of the first gear 270 and the second gear 320 attempt to collide with each other, the repulsive force (a property that pushes each other when they have the same magnetic polarity) can cause the second gear 320 to rotate.

[0212] Since the magnetic polarities of the first adjustment unit 510 and the second adjustment unit 520 are different from each other, the attraction force can cause the second gear 320 to rotate. For example, when the magnetic polarity of the first adjustment unit 510 is N, the magnetic polarity of the second adjustment unit 520 can be S. Alternatively, when the magnetic polarity of the first adjustment unit 510 is S, the magnetic polarity of the second adjustment unit 520 can be N.

[0213] When the ends of the teeth of the first gear 270 and the second gear 320 attempt to collide with each other, the attraction force, which is a property that attracts different magnetic polarities, can cause the second gear 320 to rotate.

[0214] The first adjustment unit 510 and the second adjustment unit 520 can be arranged in a ring and can have the same number of magnets. Since the magnets are evenly aligned, the position of gear engagement can be controlled.

[0215] When the power is switched to non-freewheel mode, the gear engagement operation can be smoothly initiated, and errors can be prevented during the gear engagement operation.

[0216] The first adjustment unit 510 can be modified in various ways by magnetic force within its technical features located in the first gear 270.

[0217] The first adjustment unit 510 may be disposed along the outer periphery of the first connecting gear 274 disposed in the first gear 270. The first adjustment unit 510 may have a plurality of magnets disposed along an arc on the outer surface of the arc-shaped first connecting gear 274.

[0218] The first adjustment unit 510 can be integrally formed with the first gear 270, and various modifications are possible. For example, if needed, the first adjustment unit 510 can be disposed as a separate component on the outer surface of the first gear 270.

[0219] The first adjustment unit 510 according to an embodiment of the present disclosure may include a first magnet 512. The first magnet 512 may be connected to a first gear 270 and may be modified in various ways within technical features disposed along the outer periphery of a first connecting gear 274 that engages with a moving gear unit 300.

[0220] According to embodiments of the present disclosure, a plurality of first magnets 512 may be provided and installed in a state of being inserted into a first gear body 272 provided on the outer surface of a first connecting gear 274. The first magnet 512 may be a permanent magnet having a cylindrical shape and is configured such that a set polarity faces the second gear 320.

[0221] The number of first magnets 512 can be proportional to the number of gear teeth provided in the first connecting gear 274. When the number of gear teeth of the first connecting gear 274 according to the embodiment is N1 and the number of first magnets 512 is S1, N1 = S1 * N. Here, N is a natural number.

[0222] The number of first magnets 512 according to embodiments of the present disclosure may be equal to the number of gear teeth provided in the first connecting gear 274, and this number may be changed if necessary.

[0223] The first magnet 512 can be connected to the first gear 270 and is arranged along the circumference of the first connecting gear 274 that engages with the second gear 320.

[0224] The second adjustment unit 520 can be modified in various ways within its technical feature of being disposed in the movable gear unit 300 and having magnetic force while facing the first adjustment unit 510. The second adjustment unit 520 can be disposed in a position facing the first adjustment unit 510, and can be disposed along the outer periphery of the second gear 320 disposed in the movable gear unit 300 using magnetic force.

[0225] The second adjustment unit 520 according to embodiments of the present disclosure may include a second magnet 522. The second magnet 522 may be connected to the moving gear unit 300 and may be modified in various ways within the technical features of its arrangement along the circumference of the second connecting gear 326 that engages with the first gear 270.

[0226] According to embodiments of the present disclosure, the second magnet 522 can be installed in a state where it is inserted into the second gear body 322 disposed on the outer surface of the second connecting gear 326. The second magnet 522 can be a permanent magnet having a cylindrical shape and is configured such that its set polarity faces the first gear 270.

[0227] The number of second magnets 522 can be proportional to the number of gear teeth provided in the second connecting gear 326. When the number of gear teeth of the second connecting gear 326 according to the embodiment is N1 and the number of second magnets 522 is S1, N1 = S1 * N. Here, N is a natural number. Moreover, the number of first magnets 512 can be equal to the number of second magnets 522.

[0228] The number of second magnets 522 according to embodiments of the present disclosure can be equal to the number of gear teeth provided in the second connecting gear 326, and this number can be changed if necessary.

[0229] The second magnet 522 can be connected to the second gear 320 and is arranged along the circumference of the second connecting gear 326 that engages with the first gear 270.

[0230] When the gear position adjustment unit 500 is operated by repulsive force, the first magnet 512 can be positioned at a position corresponding to the gear teeth of the first gear 270. When an extension line is radially extended from the center of the first gear 270, the first magnet 512 and the gear teeth of the first gear 270 are on the same extension line.

[0231] The second magnet 522 can be positioned at a location corresponding to the gear teeth of the second gear 320. When an extension line is radially extended from the center of the second gear 320, the second magnet 522 and the gear teeth of the second gear 320 are on the same extension line.

[0232] Therefore, with the first magnet 512 and the second magnet 522 facing each other, the gear teeth of the first gear 270 and the gear teeth of the second gear 320 also face each other. At this time, the repulsive force causes the second magnet 522 to move in a direction spaced apart from the first magnet 512, and the second gear 320 can also rotate together with the second magnet 522, so that the gear teeth of the first gear 270 and the gear teeth of the second gear 320 can be geared together without colliding with each other.

[0233] When the gear position adjustment unit 500 is operated by attractive force, the first magnet 512 can be positioned at a location that is not aligned with the gear teeth of the first gear 270. When an extension line is provided radially from the center of the first gear 270, the first magnet 512 and the gear teeth of the first gear 270 are arranged such that they are not on the same extension line.

[0234] The second magnet 522 can be positioned at a location that is not aligned with the gear teeth of the second gear 320. When an extension line is provided radially from the center of the second gear 320, the second magnet 522 and the gear teeth of the second gear 320 are arranged such that they are not on the same extension line.

[0235] Therefore, when the first magnet 512 and the second magnet 522 are facing each other, the gear teeth of the first gear 270 and the gear teeth of the second gear 320 are not facing each other. At this time, because the attraction force moves the second magnet 522 in the direction of contact between the second magnet 522 and the first magnet 512, the second gear 320 can rotate together with the second magnet 522, so that the gear teeth of the first gear 270 and the gear teeth of the second gear 320 can be geared together without colliding with each other.

[0236] Figure 15 This is a front view showing the state in which the first sensor 610 and the second sensor 620 detect the sensing target protrusion 390 according to an embodiment of the present disclosure. Figure 16 This is a front view showing a state in which only the second sensor 620 detects the sensing target protrusion 390 according to an embodiment of the present disclosure.

[0237] like Figure 15 and Figure 16 As shown, the protrusion detection sensor 600 can be disposed in the fixed housing 240 and can be modified in various ways within the technical features of detecting the movement of the moving gear unit 300. The protrusion detection sensor 600 according to embodiments of this disclosure may include a first sensor 610 and a second sensor 620.

[0238] The first sensor 610 can be positioned on the movement path of the first protrusion 392 and can detect the movement of the first protrusion 392. The second sensor 620 can be positioned on the movement path of the second protrusion 394 and can detect the movement of the second protrusion 394.

[0239] The first sensor 610 and the second sensor 620 can face each other and be arranged on the same straight line. The first sensor 610 and the second sensor 620 can be installed at the same height. When the internal gear 310 moves upward, the first sensor 610, which is used to sense the first protrusion 392, can be deactivated, and only the second sensor 620, which is used to sense the second protrusion 394, can be activated.

[0240] When the internal gear 310 moves downward, the first sensor for sensing the first protrusion 392 and the second sensor 620 for sensing the second protrusion 394 can operate simultaneously.

[0241] The first sensor 610 and the second sensor 620 may be sensors comprising a light receiving portion and a light emitting portion that use infrared light. Alternatively, the first sensor 610 and the second sensor 620 may be limit sensors that operate in direct contact with the sensing target protrusion 390.

[0242] The operation of the first sensor 610 and the second sensor 620 can appropriately detect the position of the internal gear 310, including the second connecting gear 326. Therefore, the normal operating state of the freewheel mode and the normal operating state of the non-freewheel mode can be easily and quickly sensed.

[0243] In the following, with reference to the accompanying drawings, the operating state of the freewheel adjustable wheel 200 and the operating state of the exercise bike including the freewheel adjustable wheel 200 according to embodiments of the present disclosure will be described in detail.

[0244] Figure 14 This is a perspective view showing the first gear 270 and the second gear 320 engaged with each other according to an embodiment of the present disclosure.

[0245] like Figure 8 and Figure 14As shown, when the axial shaft rotates through the operation of the drive unit 280, the power gear 286 rotates together with the axial force shaft to rotate the first transmission gear 292 and the second transmission gear 294. When the outer rotating gear 360, which engages with the second transmission gear 294, rotates, the inner moving gear 330 disposed within the outer rotating gear 360 rotates and moves toward the first gear 270.

[0246] When the inner moving gear 330 moves upward to the first gear 270, the position of the second gear 320 can be adjusted by the magnetic force of the first adjusting unit 510 located on the circumference of the first connecting gear 274 and the magnetic force of the second adjusting unit 520 located on the circumference of the second connecting gear 326.

[0247] Since the second gear 320 can be rotated by the magnetic force of the gear position adjustment unit 500, the second gear 320 can be moved to a position where the gear teeth of the first connecting gear 274 and the gear teeth of the second connecting gear 326 will not collide with each other.

[0248] With the second gear 320 rotating, the inner moving gear 330 can move upward, allowing the second connecting gear 326 of the second gear 320 to engage with the first connecting gear 274 of the first gear 270. When the pedal unit 40 rotates in the opposite direction with the second connecting gear 326 engaged with the first connecting gear 274, the power transmitted to the rotating gear 210 can be transmitted to the first gear 270 via the spline gear 216 and the second gear 320 to rotate the inner housing 250.

[0249] When the pedal unit 40 rotates forward, power can be transmitted to the first gear 270 via the clutch bearing 260, allowing the inner housing 250 to rotate forward together with the first gear 270. Therefore, the freewheel adjustable wheel 200 and the exercise bike including the freewheel adjustable wheel 200 can operate in non-freewheel mode.

[0250] like Figures 8 to 10 As shown, when the axial force shaft is operated by the drive unit 280, the power gear 286 can rotate together with the axial force shaft to rotate the first transmission gear 292 and the second transmission gear 294. When the outer rotating gear 360, which engages with the second transmission gear 294, rotates, the inner moving gear 330 disposed within the outer rotating gear 360 can rotate and move in a direction spaced apart from the first gear 270.

[0251] As the inner moving gear 330 moves, the second gear 320 can also be spaced apart from the first gear 270. When the second connecting gear 326 is spaced apart from the first connecting gear 274, when the pedal unit 40 rotates, the power of the rotating gear 210 cannot be transmitted to the inner housing 250 through the first gear 270.

[0252] When the pedal unit 40 rotates forward, power is transmitted to the first gear 270 via the clutch bearing 260. Therefore, the inner housing 250 can rotate forward together with the first gear 270. The freewheel adjustable wheel 200 and the exercise bike including the freewheel adjustable wheel can operate in freewheel mode.

[0253] These embodiments have been described above with reference to several illustrative examples. However, this disclosure is not intended to limit the embodiments and drawings set forth herein, and many other modifications and embodiments can be devised by those skilled in the art. Furthermore, although not explicitly described in the description of the embodiments, the effects and predictable effects based on the configurations in this disclosure will be included within the scope of this disclosure.

Claims

1. A freewheel adjustable wheel, the freewheel adjustable wheel comprising: A rotating gear, which rotates by power transmitted from the pedal unit, and includes gears arranged along its outer periphery; A fixed housing that rotatably supports the rotating gear; An inner housing, which is installed within the fixed housing; A clutch bearing is disposed between the rotating gear and the inner housing, and transmits power when the rotating gear rotates in the forward direction; A first gear has a shape in which one side is fixed to the inner housing and the other side surrounds the outer surface of the clutch bearing, and the first gear receives power through the clutch bearing; A drive unit, which is fixed to the fixed housing and provides rotational power; A movable gear, which is powered by the drive unit and operates in a non-free wheel mode engaged with the first gear and in a free wheel mode spaced apart from the first gear; as well as A gear position adjustment unit is disposed in each of the first gear and the moving gear, and the position of the first gear and the moving gear engaging with each other is adjusted by magnetic force.

2. The freewheel adjustable wheel according to claim 1, wherein, The gear position adjustment unit includes: A first adjusting unit, the first adjusting unit being disposed along the outer periphery of a first connecting gear disposed in the first gear and including magnetic force; and The second adjustment unit is disposed at a position facing the first adjustment unit, and the second adjustment unit is disposed along the outer periphery of the second gear disposed in the moving gear and includes magnetic force.

3. The freewheel adjustable wheel according to claim 2, wherein, The first adjustment unit and the second adjustment unit adjust the engagement position of the second gear with the first gear by using attractive or repulsive forces.

4. The freewheel adjustable wheel according to claim 1, wherein, The movable gear includes: An internal gear, which engages with a splined gear disposed in the rotating gear to rotate together, and transmits power while moving in the axial direction of the rotating gear and engaging with the first gear; and An external rotating gear is disposed on the outer surface of the internal gear, and the internal gear is moved along the axial direction of the rotating gear by the operation of rotating the gear by power transmitted from the drive unit.

5. The freewheel adjustable wheel according to claim 4, wherein, The internal gear includes: The second gear receives power from the splined gear to receive power from the rotating gear, and moves toward the first gear to engage with the first gear; An internal moving gear, disposed between the second gear and the external rotating gear, the internal moving gear comprising a helical gear engaging the inner surface of the external rotating gear, and moving by rotation of the external rotating gear to move the second gear in the axial direction; and A guide rod having a rod shape fixed to the fixed housing, and the guide rod restricting the rotation of the inner moving gear and guiding the axial movement of the inner moving gear.

6. The freewheel adjustable wheel according to claim 5, wherein, The second gear includes: A second gear body extends in a ring shape, in which a linear gear that engages with the splined gear is arranged along the inner circumference; A second connecting gear, wherein the second connecting gear has teeth formed along the outer periphery of the first gear facing the second gear body; and A connecting bearing is disposed between the second gear and the internal moving gear.

7. The freewheel adjustable wheel according to claim 5, wherein, The second gear is rotatable in the circumferential direction and is connected to the gear position adjustment unit to rotate by magnetic force.

8. The freewheel adjustable wheel according to claim 5, wherein, The gear position adjustment unit includes: A first adjusting unit, disposed within the first gear and including magnetic force; and The second adjustment unit is disposed in the second gear and faces the first adjustment unit, and the second adjustment unit includes magnetic force.

9. The freewheel adjustable wheel according to claim 8, wherein, The first adjustment unit and the second adjustment unit adjust the position of the rotating first gear and the second gear engaging with each other by means of repulsive force or attractive force.

10. The freewheel adjustable wheel according to claim 8, wherein, The first adjustment unit includes a plurality of first magnets connected to the first gear and arranged along the circumference of a first connecting gear that engages with the second gear.

11. The freewheel adjustable wheel according to claim 8, wherein, The second adjustment unit includes a plurality of second magnets connected to the second gear and arranged along the circumference of a second connecting gear that engages with the first gear.

12. The freewheel adjustable wheel according to claim 1, wherein, The first gear includes: A first gear body, the first gear body surrounding the outer surface of the clutch bearing and fixed to the inner housing; and A first connecting gear is formed at one end of the first gear body facing the movable gear and engages with a second connecting gear disposed in the movable gear.

13. An exercise bike, said exercise bike comprising: Frame unit, which supports the saddle and handle; A pedal unit, wherein the pedal unit is disposed in a turntable disposed on a side surface of the frame unit; A rotating gear, which rotates by power transmitted from the pedal unit, and is rotatably coupled to the outer surface of a shaft and has a spline gear disposed on the outer surface; A fixed housing rotatably supports the rotating gear, and the rotation of the fixed housing is restricted. An inner housing, which is installed within the fixed housing; A clutch bearing is disposed between the rotating gear and the inner housing, and transmits power when the rotating gear rotates in the forward direction; A first gear has a shape in which one side is fixed to the inner housing and the other side surrounds the outer surface of the clutch bearing, and the first gear receives power through the clutch bearing; A drive unit, which is fixed to the fixed housing and provides rotational power; A movable gear, which is powered by the drive unit and operates in a non-free wheel mode engaged with the first gear and in a free wheel mode spaced apart from the first gear; A gear position adjustment unit is disposed in each of the first gear and the moving gear, and the position of the first gear and the moving gear engaging with each other is adjusted by magnetic force; as well as A protrusion detection sensor is disposed in the fixed housing and detects the movement of the moving gear.

14. The exercise bike according to claim 13, wherein, The gear position adjustment unit includes: A first adjusting unit, disposed within the first gear and possessing magnetic force; and A second adjustment unit is disposed in the moving gear and faces the first adjustment unit, and the second adjustment unit has magnetic force.

15. The exercise bike according to claim 14, wherein, The first adjustment unit includes a plurality of first magnets connected to the first gear and arranged along the circumference of a first connecting gear that engages with the moving gear.

16. The exercise bike according to claim 14, wherein, The second adjustment unit includes a plurality of second magnets connected to the moving gear and arranged along the circumference of a second connecting gear that engages with the first gear.

17. The exercise bike according to claim 14, wherein, The movable gear includes: An internal gear, which engages with a splined gear disposed in the rotating gear to rotate together, and transmits power while moving in the axial direction of the rotating gear and engaging with the first gear; and An external rotating gear, disposed on the outer surface of the internal gear, and whose rotational operation, powered by a force transmitted from the drive unit, causes the internal gear to move along the axial direction of the rotating gear; and A sensing target protrusion, the sensing target protrusion having a protrusion protruding from the internal gear, and being detected by the protrusion detection sensor.

18. The exercise bike according to claim 17, wherein, The sensing target protrusion includes: A first protrusion protruding from the internal gear; and A second protrusion protrudes from the internal gear, the length of the second protrusion being longer than the length of the first protrusion.

19. The exercise bike according to claim 18, wherein, The protrusion detection sensor includes: A first sensor, positioned along the movement path of the first protrusion, detects the movement of the first protrusion; and A second sensor is positioned on the movement path of the second protrusion and detects the movement of the second protrusion.

20. The exercise bike according to claim 13, wherein, The inner housing rotates by power transmitted from the rotating gear and is rotatably connected to the fixed housing.

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