Flywheel-regulated wheel and exercise bicycle having same

Abstract

The present invention relates to a flywheel adjustment type wheel and a fitness bicycle having the same. In more detail, it can include a rotation gear part rotating together with a pulley fixed to an outer side thereof, a circular gear being provided along an outer side circumference thereof; a housing part supporting the rotation gear part to be rotatable; a first power transmission part transmitting power transmitted to the rotation gear part to the housing part only in the case where the rotation gear part is forwardly rotated; and a second power transmission part transmitting power transmitted to the rotation gear part to the housing part in the case where the rotation gear part is reversely rotated.

Description

TECHNICAL FIELD

[0001] The present application relates to a flywheel adjustment wheel capable of adjusting whether power of a pedal is transmitted to a wheel when the pedal is reversely rotated, and a fitness bicycle having the same. BACKGROUND

[0002] In general, as an indoor exercise machine for enhancing muscle strength, a weight machine for enhancing muscle strength and an aerobic exercise machine for enhancing cardio-pulmonary function are widely used as a fitness machine.

[0003] The aerobic exercise machine is roughly classified into a treadmill that allows a user to walk or run on an endless track, a fitness bicycle that enables cardio-pulmonary exercise while enhancing leg muscles by rotating a pedal, a stair climber for providing a stair climbing effect, and the like.

[0004] The fitness bicycle is installed at a designated place and enables exercise by rotating a wheel by the action of stepping on a pedal. Such a fitness bicycle can be classified into a dynamic bicycle that enables dynamic exercise and an indoor bicycle that rotates a wheel by forward rotation of a pedal like a bicycle.

[0005] Since the dynamic bicycle has a characteristic of exercising by stepping on a pedal, a non-freewheel structure is adopted, and the indoor bicycle adopts a freewheel structure.

[0006] Since the non-freewheel structure applied to the dynamic bicycle transmits power to a wheel in the case of forward rotation of a pedal and in the case of reverse rotation of a pedal, the wheel is rotated.

[0007] In addition, the freewheel structure applied to the indoor bicycle transmits power to a wheel only in the case of forward rotation of a pedal, and does not transmit power to a wheel in the case of reverse rotation of a pedal.

[0008] In the related art, since the power transmission structures of the dynamic bicycle and the indoor bicycle are different, in the case of alternately performing dynamic exercise and bicycle exercise, it is necessary to separately purchase the dynamic bicycle and the indoor bicycle, and thus there is a problem in that the cost of exercise machines increases. Therefore, it is necessary to improve this.

[0009] Korean Patent No. 10-1641429 (Filing Date: 2016.07.14, Invention Name: Dynamic Bicycle) discloses the background art of the present application. SUMMARY

[0010] Problems to be Solved by the Invention

[0011] The present application aims to provide a flywheel adjustment wheel capable of selectively using a flywheel function and a fitness bicycle having the same.

[0012] In addition, the present application aims to provide a flywheel adjustment wheel capable of performing a dynamic exercise and a bicycle exercise using one exercise machine and a fitness bicycle having the same.

[0013] The objects of the present application are not limited to the above-mentioned objects, and other objects and advantages of the present application not mentioned above can be understood from the following description, and can be more clearly understood from the embodiments of the present application. In addition, it will be easily known to those skilled in the art that the objects and advantages of the present application can be achieved by the means given in the claims and combinations thereof.

[0014] Technical solutions to solve problems

[0015] The flywheel adjustment wheel of the present application and the fitness bicycle having the same for solving the problems as described above are characterized in that a flywheel action of the wheel is easily controlled by engaging or disengaging the second power transmission part with the rotation gear part.

[0016] Specifically, in the case where the pedal part is forwardly rotated, the rotational power transmitted to the rotation gear part through the belt wheel is transmitted to the housing part through the first power transmission part, thereby rotating the housing part.

[0017] In addition, in the case where the pedal part is reversely rotated, the rotational power transmitted to the rotation gear part through the belt wheel is transmitted to the housing part through the locking gear part of the second power transmission part which is in contact with the rotation gear part, thereby rotating the housing part.

[0018] In addition, the flywheel adjustment wheel of the present application can include at least any one of a belt wheel, a rotation gear part, a housing part, a first power transmission part, and a second power transmission part.

[0019] In addition, the belt wheel can be rotated by receiving power of the pedal part, the rotation gear part can be rotated together with the belt wheel fixed to the outside thereof, and a circular gear is provided along the outer circumferential edge thereof.

[0020] In addition, the housing part can support the rotation gear part to be rotatable.

[0021] In addition, the first power transmission part can be connected with the rotation gear part and the housing part, and support the rotation gear part to be rotatable. In addition, the first power transmission part can transmit power transmitted to the rotation gear part to the housing part only in the case where the rotation gear part is forwardly rotated.

[0022] Further, a second power transmission portion is provided in the housing portion, and is engaged with the circular gear by an external force. Further, the second power transmission portion can transmit power transmitted to the rotation gear portion to the housing portion when the rotation gear portion is reversely rotated.

[0023] Further, the rotation gear portion includes a rotation shaft member extending from a center portion of the circular gear to both sides, and the pulley is detachably provided to the rotation shaft member, and the rotation shaft member rotates together with the pulley. Further, the circular gear is provided with teeth along an outer circumferential edge of the rotation shaft member, and rotates together with the rotation shaft member.

[0024] Further, the housing portion can include an outer housing portion, the second power transmission portion is detachably provided to the outer housing portion, the pulley is located outside the outer housing portion, and the first power transmission portion is located inside the outer housing portion. Further, the housing portion can include an inner housing portion fixed inside the outer housing portion, connected to the first power transmission portion, and supporting the second power transmission portion to be rotatable.

[0025] Further, the inner housing portion can include an inner housing main body fixed inside the outer housing portion, and the rotation gear portion is located at a center portion of the inner housing main body. Further, the inner housing portion can include a rotation support portion provided in a shape protruding from the inner housing main body and surrounding the first power transmission portion, and supporting the rotation gear portion to be rotatable.

[0026] Further, the inner housing portion can include a separation maintaining protrusion protruding from the inner housing main body toward the housing portion, and maintaining a separation between the inner housing main body and the housing portion.

[0027] Further, the inner housing portion can further include a first guide portion forming a groove in a surface opposite to the second power transmission portion, and guiding rotation of the second power transmission portion.

[0028] Further, the first guide portion can include a first guide groove portion guiding rotation of an engagement gear portion provided to the second power transmission portion, and forming a groove portion in a shape of a sector in a surface opposite to the engagement gear portion in the inner housing portion. Further, the first guide portion can include a second guide groove portion located inside the first guide groove portion, and forming a groove in a shape of a circular arc along a movement path of the engagement gear portion.

[0029] Further, the first power transmission portion can include a first power transmission main body in a shape of a ring. The first power transmission main body can be configured by a one-way clutch bearing.

[0030] In addition, the first power transmission part can include a first key member connecting the inner side of the first power transmission body and the outer side of the rotation gear part. In addition, the first power transmission part can include a second key member connecting the outer side of the first power transmission body and the housing part.

[0031] In addition, the second power transmission part can include a power transmission housing detachably provided to the housing part, a handle part rotatably provided to the power transmission housing, and a locking gear part connected to the handle part across the power transmission housing. The locking gear part is rotatably provided to the housing part, rotates together with the handle part, and is locked to the circular gear, and thus the flywheel function can be disabled.

[0032] In addition, the locking gear part can include a locking gear body connected to the handle part and rotating together with the handle part, engaging with the circular gear, a coupling body coupled to the locking gear body, and an elastic locking part located at the inner side of the locking gear body and the coupling body, moving by an elastic force and being locked to the power transmission housing.

[0033] In addition, the locking gear body can include a first body provided with a connection groove part into which the handle part is inserted and locked, and rotatably provided to the housing part, and a second body extending from the first body, rotating together with the first body and engaging with the teeth of the circular gear, and being fastened to the coupling body across the elastic locking part.

[0034] In addition, the elastic locking part can include a moving protrusion located at the boundary of the locking gear body and the coupling body, protruding to the outside of the locking gear part, and an elastic member located at the boundary of the locking gear body and the coupling body, pressing the moving protrusion in the direction toward the outside of the locking gear part.

[0035] In addition, the power transmission housing can further include a second guide part forming a groove in the face opposite to the second power transmission part, guiding the rotation of the second power transmission part.

[0036] In addition, the second guide part can include an inner side guide groove forming a circular arc-shaped groove along the moving path of the locking gear part, and a fixed groove forming a groove at the position where the locking gear part stops, at both sides of the inner side guide groove.

[0037] In addition, the exercise bicycle of the present application can include a frame portion, a pedal portion, a belt wheel, and a flywheel adjustment wheel. The frame portion can support a seat portion and a handle portion. In addition, the pedal portion can be rotatably provided to the frame portion, and can be rotated in a forward direction or a reverse direction by a user. The belt wheel is rotated by receiving power of the pedal portion through a chain or a belt, and is connected to the flywheel adjustment wheel.

[0038] In addition, the rotation gear portion includes a rotation shaft member and a circular gear, and a flat outer side surface portion provided at an outer side of the rotation shaft member is provided in a state of being in contact with an inner side surface portion of the belt wheel located at an outer side of the rotation shaft member.

[0039] Effects of the Invention

[0040] In the flywheel adjustment wheel of the present application and the exercise bicycle having the same, since the flywheel function can be selectively used by the operation of the second power transmission portion, the use convenience of the exercise equipment can be improved.

[0041] In addition, in the present application, depending on the presence or absence of the flywheel function, it is not necessary to separately purchase the exercise equipment, and thus the purchase cost of the exercise equipment can be saved.

[0042] In addition, in the present application, the second power transmission portion is operated by the user's operation without using an additional driving motor, and thus the electricity fee can be saved.

[0043] In addition, in the present application, since the second power transmission portion is configured as a module and is detachably provided to the housing portion, the time and cost required for the replacement and repair work of the second power transmission portion can be saved.

[0044] In addition, in the present application, since the elastic locking portion can be inserted into the fixing groove of the power transmission housing and maintained in a stopped state, the operation reliability of the second power transmission portion can be improved.

[0045] In addition to the above effects, specific effects of the present application will be described together with the description of the following specific matters for implementing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a perspective view illustrating an exercise bicycle having a flywheel adjustment wheel according to an embodiment of the present application.

[0047] Figure 2 is a perspective view illustrating a state in which the flywheel adjustment wheel is separated from the exercise bicycle according to an embodiment of the present application.

[0048] Figure 3 is a perspective view illustrating a flywheel adjustment wheel according to an embodiment of the present application.

[0049] Figure 4is an exploded perspective view of a flywheel adjustment type wheel of an embodiment of the present application.

[0050] Figure 5 is a perspective view showing a band wheel and a rotary gear portion of an embodiment of the present application.

[0051] Figure 6 is a perspective view showing a second power transmission portion of an embodiment of the present application.

[0052] Figure 7 is a perspective view showing a back surface of a power transmission housing of an embodiment of the present application.

[0053] Figure 8 is a sectional view showing a state in which a moving projection of an embodiment of the present application is seated in an inner guide groove.

[0054] Figure 9 is a sectional view showing a state in which a moving projection of an embodiment of the present application is seated in a fixed groove.

[0055] Figure 10 is an exploded perspective view of a first power transmission portion of an embodiment of the present application.

[0056] Figure 11 is a perspective view showing a state in which a second power transmission portion is provided on a side surface of a rotary gear portion of an embodiment of the present application.

[0057] Figure 12 is a perspective view showing a state in which a locking gear portion of an embodiment of the present application is locked in a circular gear.

[0058] Figure 13 is a sectional view of a flywheel adjustment type wheel of an embodiment of the present application.

[0059] Figure 14 is a sectional view showing force transmission of a flywheel adjustment type wheel of an embodiment of the present application.

[0060] Figure 15 is a front view showing a state in which a locking gear portion of an embodiment of the present application is locked in a circular gear.

[0061] Figure 16 is a front view showing a state in which a locking gear portion of an embodiment of the present application is spaced apart from a circular gear. DETAILED DESCRIPTION

[0062] The above objects, features and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art to which the present application pertains can easily implement the technical idea of the present application. In the course of the description of the present application, if it is judged that detailed description of the well-known technology related to the present application can obscure the gist of the present application, the detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals refer to the same or similar constituent elements.

[0063] Figure 1 is a perspective view showing an exercise bicycle 1 having a flywheel adjustment wheel 10 according to an embodiment of the present application, Figure 2 is a perspective view showing a state in which the flywheel adjustment wheel 10 is detached from the exercise bicycle 1 according to an embodiment of the present application.

[0064] As shown in Figure 1 and Figure 2 , the exercise bicycle 1 according to an embodiment of the present application can include a frame part 200, a pedal part 230, a belt wheel 20, and the flywheel adjustment wheel 10.

[0065] The frame part 200 can be deformed into various shapes within the technical idea of supporting the seat part 210 and the handle part 220 and supporting the pedal part 230 to be rotatable. The frame part 200 according to an embodiment can include a first frame 201 supporting the flywheel adjustment wheel 10, and a second frame supporting the seat part 210.

[0066] The pedal part 230 is rotatably provided to the frame part 200, and can be rotated in a forward direction or a reverse direction by a user. The belt wheel 20 can be rotated by receiving power of the pedal part 230 through a chain or a belt, and is connected with the flywheel adjustment wheel 10. In addition, a display part 240 outputting information related to exercise can also be supported to the frame part 200.

[0067] Figure 3 is a perspective view showing the flywheel adjustment wheel 10 according to an embodiment of the present application, Figure 4 is an exploded perspective view of the flywheel adjustment wheel 10 according to an embodiment of the present application.

[0068] As shown in Figure 3 and Figure 4 , the flywheel adjustment wheel 10 according to an embodiment of the present application can include at least any one of the belt wheel 20, a rotation gear part 30, a housing part 40, a first power transmission part 100, and a second power transmission part 110.

[0069] In the flywheel adjustment wheel 10, diverse deformation implementations can be made within the technical idea of easily controlling flywheel action of the wheel by engaging or disengaging the second power transmission part 110 with the rotation gear part 30.

[0070] In the freewheel-regulated wheel 10 of the present application, a user can easily select two power transmission methods of freewheel and non-freewheel by rotating the handle portion 120 provided at the second power transmission portion 110.

[0071] For example, in the case where the pedal portion 230 is forwardly rotated, the rotational power transmitted to the rotation gear portion 30 through the belt wheel 20 is transmitted to the housing portion 40 through the first power transmission portion 100, and the housing portion 40 is rotated. Also, in the case where the pedal portion 230 is reversely rotated, the rotational power transmitted to the rotation gear portion 30 through the belt wheel 20 is transmitted to the housing portion 40 through the locking gear portion 130 of the second power transmission portion 110 which is engaged with the rotation gear portion 30, and the housing portion 40 is rotated.

[0072] Figure 5 FIG. 1 is a perspective view showing a belt wheel 20 and a rotation gear portion 30 according to an embodiment of the present application.

[0073] As shown in FIGS. 1 and 2, the belt wheel 20 is provided at the outer side thereof with a groove portion for mounting at least one of a belt member, a chain, and a rope. Thus, the belt wheel 20 can be rotated by the power of the pedal portion 230 through at least one of the belt member, the chain, and the rope. Figure 4 Figure 5 As shown in FIGS. 1 and 2, the belt wheel 20 is provided at the outer side thereof with a groove portion for mounting at least one of a belt member, a chain, and a rope. Thus, the belt wheel 20 can be rotated by the power of the pedal portion 230 through at least one of the belt member, the chain, and the rope.

[0074] The belt wheel 20 according to an embodiment of the present application is formed in a cylindrical shape, and a belt member is provided at the outer side of the belt wheel 20, and a rotation gear portion 30 is connected at the inner side of the belt wheel 20. A hollow portion is formed at the inner side of the belt wheel 20, and a planar inner flat portion 22 is provided at the inner side of the belt wheel 20 opposite to the rotation gear portion 30.

[0075] The belt wheel 20 is fixed at the outer side of the rotation gear portion 30, and the belt wheel 20 is rotated together with the rotation gear portion 30. Also, a circular gear 37 can be provided along the outer side periphery of the rotation gear portion 30. The rotation gear portion 30 can be variously modified within the technical idea that the belt wheel 20 is rotated together with the rotation gear portion 30 and the circular gear 37 engaged with the second power transmission portion 110 is provided at the outer side thereof. The rotation gear portion 30 according to an embodiment of the present application includes a rotation shaft member 31 and the circular gear 37.

[0076] The rotation shaft member 31 is a bar shape extended to both sides from the center portion of the circular gear 37, and a hole 32 is formed at one side of the rotation shaft member 31. Figure 5 ​As a reference, the right side) is detachably provided with a pulley 20. In addition, an outer side flat portion 33 corresponding to an inner side flat portion 22 of the pulley 20 is provided on the outer side of the rotation shaft member 31. Since the outer side flat portion 33 forms a flat on the outer side of the rotation shaft member 31, the pulley 20 is coupled to the outer side of the rotation shaft member 31 so that the inner side flat portion 22 and the outer side flat portion 33 are disposed opposite to each other. Therefore, the outer side flat portion 33 of the flat shape provided on the outer side of the rotation shaft member 31 is disposed in a state of being in contact with the inner side flat portion 22 of the pulley 20 located on the outer side of the rotation shaft member 31, and the rotation shaft member 31 also rotates together when the pulley 20 rotates.

[0077] A through hole portion is provided on the inner side of the rotation shaft member 31. The through hole portion penetrates the inner side of the rotation shaft member 31 and extends in the length direction of the rotation shaft member 31. Therefore, a shaft 180 described later is located on the inner side of the rotation shaft member 31 through the through hole portion. In addition, both sides of the shaft 180 protrude to both sides of the rotation shaft member 31 and are fixed to the frame portion 200.

[0078] The circular gear 37 can be variously deformed within the technical idea that the gear can be formed with teeth along the outer side circumference of the rotation shaft member 31 and rotate together with the rotation shaft member 31. The circular gear 37 of an embodiment of the present application is a gear in a disc shape and is formed with teeth in the circumferential direction along the outer side circumference. The circular gear 37 is fixed to the outer side of the rotation shaft member 31, and the circular gear 37 and the rotation shaft member 31 rotate together.

[0079] In addition, an outer side key groove 34 in a groove shape for connecting with the first power transmission portion 100 is provided on the outer side of the rotation shaft member 31. A first key member 103 of the first power transmission portion 100 described later is inserted into the outer side key groove 34, and a rotational power is transmitted to the first power transmission body 101.

[0080] As shown in FIG. 1, Figure 4 The housing portion 40 can support the rotation gear portion 30 to be rotatable. In addition, the housing portion 40 can be variously deformed within the technical idea of supporting the first power transmission portion 100 and the second power transmission portion 110. The housing portion 40 of an embodiment of the present application can include an outer side housing portion 50 and an inner side housing portion 60. In addition, the housing portion 40 can further include a cover portion 90.

[0081] The outer side housing portion 50 can be variously deformed within the technical idea of detachably providing the second power transmission portion 110. The outer side housing portion 50 of an embodiment of the present application can include an outer side housing body 51 and a mounting portion 52.

[0082] The outer case body 51 is provided in a disc shape, and a center hole for disposing the rotation shaft member 31 of the rotation gear portion 30 is provided in the center portion thereof. In addition, a mounting portion 52 for disposing the power transmission case 170 is provided at a position apart from the center hole.

[0083] The hole for disposing the power transmission case 170 of the mounting portion 52 is formed in the outer case body 51. Therefore, the second power transmission portion 110, which is manufactured as a module, can be detachably disposed in the mounting portion 52.

[0084] The band wheel 20 is disposed outside the outer case portion 50, and the first power transmission portion 100 is disposed inside the outer case portion 50. The outer case body 51 can include an extension portion in a circular tube shape extending from the body provided in a disc shape toward the direction of the cover portion 90.

[0085] The inner case portion 60 is fixed inside the outer case portion 50. In addition, since the inner case portion 60 is connected to the first power transmission portion 100, power can be transmitted to the inner case portion 60 through the first power transmission portion 100 when the rotation gear portion 30 is positively rotated. In addition, the inner case portion 60 can be variously deformed within the technical idea of supporting the locking gear portion 130 of the second power transmission portion 110 so as to be rotatable. The inner case portion 60 of one embodiment of the present application can include an inner case body 70, a space maintaining protrusion 71, a first guide portion 72, and a rotation support portion 80.

[0086] The inner case body 70 can be variously deformed within the technical idea of being fixed inside the outer case portion 50 and having the rotation gear portion 30 disposed in the center portion thereof. The inner case body 70 of one embodiment of the present application is fixed to the outer case portion 50 through the circular gear 37 and the locking gear portion 130. The inner case body 70 is in a disc shape having a hollow portion, and the locking gear portion 130 is rotatably disposed in the inner case body 70.

[0087] The space maintaining protrusion 71 can be variously deformed within the technical idea of protruding from the inner case body 70 toward the outer case portion 50 disposed in the case portion 40 and maintaining a space between the inner case body 70 and the outer case portion 50 disposed in the case portion 40. The space maintaining protrusion 71 of one embodiment of the present application is a protrusion protruding from the inner case body 70 toward the outer case portion 50, and can be fixed by a screw member in a state in which an additional protrusion protruding from the outer case portion 50 is disposed inside the space maintaining protrusion 71.

[0088] The first guide portion 72 can be implemented in various variations within the technical concept of forming a groove on the surface opposite to the second power transmission portion 110 to guide the rotation of the second power transmission portion 110. In one embodiment of the present invention, the first guide portion 72 may include a first guide groove portion 73, a second guide groove portion 74, and a connecting hole 77.

[0089] The first guide groove 73 guides the rotation of the locking gear portion 130 provided in the second power transmission unit 110. A fan-shaped groove is formed on the surface of the inner housing portion 60 opposite the locking gear portion 130. Therefore, the locking gear portion 130 can stably rotate along the first guide groove 73.

[0090] Furthermore, the second guide groove 74 is located inside the first guide groove 73 and is formed as an arc-shaped groove along the movement path of the locking gear portion 130. The groove depth of the second guide groove 74 is greater than the groove depth of the first guide groove 73. Therefore, the moving protrusion 161 protruding from the locking gear body 140 moves along the second guide groove 74, thereby improving the operational reliability of the locking gear portion 130.

[0091] The connection hole 77 is located in the first guide groove 73 and is a hole extending through the inner housing body 70 . The locking gear 130 rotates around the connection hole 77 , which is also the center of the arc forming the second guide groove 74 .

[0092] The rotation support portion 80 can be configured to protrude from the inner housing body 70 and surround the first power transmission portion 100, and can be variously modified within the technical concept of rotatably supporting the rotation gear portion 30. In one embodiment of the present invention, an inner keyway 81 for transmitting shaft rotation is formed on the inner side of the rotation support portion 80.

[0093] Figure 10 1 is an exploded perspective view showing a first power transmission unit 100 according to an embodiment of the present invention.

[0094] like Figure 4 and Figure 10 As shown, the first power transmission unit 100 can be connected to the inner housing portion 60 of the rotating gear unit 30 and the housing portion 40, and can be implemented in various variations within the technical concept of supporting the rotating gear unit 30 so that it can rotate. The first power transmission unit 100 can transmit the power transmitted to the rotating gear unit 30 to the housing portion 40 only when the rotating gear unit 30 rotates in the forward direction. The first power transmission unit 100 of one embodiment of the present invention may include a first power transmission body 101, a first key groove 102, a first key member 103, a second key groove 104, and a second key member 105.

[0095] The first power transmission body 101 can be variously modified within the technical idea of being formed in a ring shape and transmitting only a forward rotation to the housing portion 40. The first power transmission body 101 of an embodiment of the present application can be composed of a one-way clutch bearing.

[0096] The first key member 103 can connect the inner side of the first power transmission body 101 and the outer side of the rotation gear portion 30. A first key groove 102 is formed at the inner side of the first power transmission body 101 opposite the rotation gear portion 30. In addition, the first key member 103 is inserted into the outer side key groove 34 of the rotation shaft member 31 and the first key groove 102 formed at the first power transmission body 101 in a state of being opposite each other. Accordingly, the rotation shaft member 31 and the first power transmission body 101 are connected by the first key member 103.

[0097] The second key member 105 can be variously modified within the technical idea of connecting the outer side of the first power transmission body 101 and the housing portion 40. The second key member 105 of an embodiment of the present application is in a rectangular parallelepiped shape, and is inserted into a second key groove 104 formed at the outer side of the first power transmission body 101 and an inner side key groove 81 formed at the inner side housing portion 60. Accordingly, the inner side housing portion 60 and the first power transmission body 101 are connected by the second key member 105.

[0098] Figure 6 is a perspective view showing the second power transmission portion 110 of an embodiment of the present application being disassembled.

[0099] As shown in Figure 4 and Figure 6 , the second power transmission portion 110 can be variously modified within the technical idea of being provided to the housing portion 40 and being caught to the circular gear 37 by an external force while being operated. The second power transmission portion 110 can transmit power transmitted to the rotation gear portion 30 to the housing portion 40 when the rotation gear portion 30 is reversely rotated. The second power transmission portion 110 of an embodiment of the present application can include a handle portion 120, a catch gear portion 130, and a power transmission housing 170.

[0100] The handle portion 120 can be variously modified within the technical idea of being rotatably provided to the power transmission housing 170. The handle portion 120 of an embodiment of the present application can include at least any one of a handle body 121, a handle protrusion 122, a connection column 123, and a flat catch portion 124.

[0101] The handle body 121 is formed in a disc shape, and the handle protrusion 122 protrudes to the front surface of the handle body 121. Accordingly, a user can grasp and rotate the handle protrusion 122, and thus the handle portion 120 can be easily rotated.

[0102] The connection post 123 is a post shape extending toward the rear of the handle main body 121. The flat surface locking portion 124 is formed on both sides of the connection post 123.

[0103] The locking gear portion 130 can be variously modified within the technical idea of being connected to the handle portion 120 across the power transmission housing 170 and rotating together with the handle portion 120. In addition, the locking gear portion 130 can be rotatably provided to the housing portion 40, rotate together with the handle portion 120, and be locked to the circular gear 37, and thus the freewheel function can be disabled. The locking gear portion 130 of an embodiment of the present application can include a locking gear main body 140, a coupling main body 150, and an elastic locking portion 160.

[0104] The locking gear main body 140 can be variously modified within the technical idea of being connected to the handle portion 120 and rotating together with the handle portion 120, and disabling the freewheel function by the action of engaging with the circular gear 37. The locking gear main body 140 of an embodiment of the present application can include a first main body 141 and a second main body 145.

[0105] The first main body 141 is provided with a connection groove portion 142 into which the handle portion 120 is inserted and locked, and is rotatably provided to the housing portion 40. The first main body 141 is a bar shape, and is provided with the connection groove portion 142 of a rectangular cross-sectional shape. Thus, since the connection post 123 is inserted into the connection groove portion 142, the rotation of the connection post 123 and the locking gear main body 140 can be synchronized.

[0106] The second main body 145 can be variously modified within the technical idea of extending from the first main body 141, rotating together with the first main body 141, and engaging with the gear of the circular gear 37, and being fastened to the coupling main body 150 across the elastic locking portion 160.

[0107] The width of the second main body 145 is smaller than the width of the first main body 141. In addition, a first inner side groove portion 146 through which the moving protrusion 161 moves is formed on the inner side of the second main body 145 opposite the coupling main body 150.

[0108] The coupling main body 150 is detachably provided to the side surface of the second main body 145, and a second inner side groove portion 152 communicating with the first inner side groove portion 146 is formed on the side surface of the coupling main body 150. If the coupling main body 150 is coupled to the second main body 145, the first inner side groove portion 146 and the second inner side groove portion 152 are communicated. Thus, the moving protrusion 161 and the elastic member 164 are provided in the inner side space formed by the first inner side groove portion 146 and the second inner side groove portion 152.

[0109] The elastic locking portion 160 can be implemented in various variations within the technical concept of being located inside the locking gear body 140 and the coupling body 150 and being moved and locked to the power transmission housing 170 by elastic force. In one embodiment of the present invention, the elastic locking portion 160 includes a movable protrusion 161 and an elastic member 164.

[0110] The movable protrusion 161 can be implemented in various variations within the technical concept of being located at the boundary between the locking gear body 140 and the coupling body 150 and protruding outward from the locking gear portion 130. In one embodiment of the present invention, the movable protrusion 161 includes an inner support body 162 disposed within the inner space formed by the first inner groove 146 and the second inner groove 152, and rod-shaped locking rods 163 protruding from both sides of the inner support body 162.

[0111] The inner support body 162 has an outer diameter larger than that of the locking rod 163 and is shaped so as to be locked inside the inner space formed by the locking gear body 140 and the coupling body 150 .

[0112] When the locking gear body 140 and the coupling body 150 are coupled, the movable protrusion 161 protrudes outward from the locking gear body 140 and the coupling body 150. One side and the other side of the movable protrusion 161 both protrude outward from the locking gear body 140 and the coupling body 150, and the movable protrusion 161 is guided by the first guide portion 72 and the second guide portion 173.

[0113] The elastic member 164 is positioned at the boundary between the locking gear body 140 and the coupling body 150, and can be implemented in various variations within the technical concept of pressing the movable protrusion 161 toward the outside of the locking gear portion 130. In one embodiment of the present invention, the elastic member 164 is a spring and is positioned within the inner space formed by the first inner groove 146 and the second inner groove 152. The elastic member 164 presses the inner support body 162, thereby pressing the locking rod 163 toward the power transmission housing 170.

[0114] Figure 7 1 is a perspective view showing the back side of the power transmission case 170 according to an embodiment of the present invention.

[0115] like Figure 6 and Figure 7 As shown, the power transmission housing 170 can be variously modified within the technical concept of being detachably mounted on the housing portion 40. The power transmission housing 170 of one embodiment of the present invention may include at least one of a seating groove 171, an inner hole 172, a second guide portion 173, and a stopper 176.

[0116] The power transmission housing 170 is a plate-shaped structure that is removably attached to the mounting portion 52 of the outer housing portion 50. A seating groove 171 is provided on the outer side of the power transmission housing 170, facing the handle portion 120. The seating groove 171 provides a disc-shaped recessed groove on the outer side of the power transmission housing 170 to facilitate rotation of the handle body 121. A hole, i.e., an inner hole 172, is formed in the center of the seating groove 171, through which the connecting post 123 of the handle portion 120 passes.

[0117] Furthermore, a second guide portion 173 is provided on the back surface of the power transmission housing 170. The second guide portion 173 can be implemented in various variations within the technical concept of forming a groove on the surface of the power transmission housing 170 opposite the second power transmission unit 110 to guide the rotation of the second power transmission unit 110. In one embodiment of the present invention, the second guide portion 173 includes an inner guide groove 174 and a fixed groove 175.

[0118] The inner guide groove 174 is formed in an arc shape along the moving path of the moving boss 161 provided on the locking gear portion 130. The inner guide groove 174 is formed in a curved shape on the surface of the power transmission case 170 facing the moving boss 161.

[0119] Furthermore, the fixing grooves 175 can be variously modified within the technical concept of being located on both sides of the inner guide groove 174 and formed at the position where the locking gear portion 130 stops. In one embodiment of the present invention, the fixing grooves 175 are formed deeper than the inner guide groove 174 and are located on both sides of the inner guide groove 174.

[0120] Figure 8 1 is a cross-sectional view showing a state where the moving protrusion 161 is seated in the inner guide groove according to an embodiment of the present invention.

[0121] like Figure 8 As shown, when the movable protrusion 161 is arranged in a vertical position, the inner housing portion 60 can be located above the movable protrusion 161, and the power transmission housing 170 can be located below the movable protrusion 161. The movable protrusion 161 is in a state where pressure is applied downward by the elastic member 164, that is, toward the power transmission housing 170.

[0122] The upper side of the moving protrusion 161 moves along the first guide portion 72 provided on the inner housing portion 60. Since the moving protrusion 161 moves along the second guide groove portion 74, the moving protrusion 161 can be stably rotated.

[0123] Furthermore, the lower side of the moving protrusion 161 moves along the second guide portion 173 provided on the power transmission housing 170. Since the lower side of the moving protrusion 161 moves along the inner guide groove 174, the moving protrusion 161 can be stably rotated.

[0124] Figure 9 is a sectional view showing a state in which the moving protrusion 161 of an embodiment of the present application is seated in the fixed groove 175.

[0125] The lower side of the moving protrusion 161 moves along the inner side guide groove 174, and then is inserted into the fixed groove 175 which is deeper than the inner side groove depth to be restricted from moving. Thus, the moving protrusion 161 is prevented from being detached from the fixed groove 175 before a force above a set external force is transmitted to the second power transmission part 110.

[0126] As shown in Figure 6 , the gear fixing part 177 is fastened with the end of the connection post 123 inserted in the stop gear part 130 through the connection hole 77 of the inner side housing part 60. Thus, the handle part 120 and the stop gear part 130 rotate with the gear fixing part 177 as the center. The gear fixing part 177 of an embodiment of the present application can include a fastening member 178 and a washer 179. The fastening member 178 is fastened with the end of the connection post 123 located at the inner side of the connection hole 77 through the washer 179 in a state in which the washer 179 in the shape of a ring is located at the rear side of the inner side housing part 70.

[0127] As shown in Figure 3 and Figure 4 , the shaft 180 is provided in the shape of penetrating the housing part 40 and the rotation gear part 30. Thus, the housing part 40 and the rotation gear part 30 can rotate with the shaft 180 as the center.

[0128] Figure 13 is a sectional view of the flywheel adjustment type wheel 10 of an embodiment of the present application.

[0129] As shown in Figure 4 and Figure 13 , a bearing part 190 is provided in order to reduce friction generated when the rotation gear part 30 rotates. The bearing part 190 of an embodiment of the present application can include a first bearing 191, a second bearing 192, a third bearing 193, and a fourth bearing 194.

[0130] The first bearing 191 is provided between the rotation shaft member 31 and the shaft 180 to support the shaft 180 so as to be rotatable. The second bearing 192 is provided between the outer side housing part 50 and the rotation shaft member 31 to support the rotation shaft member 31 so as to be rotatable. The third bearing 193 and the fourth bearing support the outer side of the rotation shaft member 31 located between the inner side housing part 60 and the cover part 90 so as to be rotatable.

[0131] On the other hand, a rotation adjustment portion 195 for adjusting the force required to rotate the housing portion 40 is provided between the inner housing portion 60 and the cover portion 90. The rotation adjustment portion 195 of the embodiment of the present application uses a motor, and can adjust the strength of the force for rotating the flywheel adjustment wheel 10 according to the change in the magnetic force of the electromagnet. The technology of providing such a rotation adjustment portion 195 on the wheel of the exercise bicycle 1 to adjust the force for rotating the flywheel adjustment wheel 10 is well known, and thus a detailed description thereof will be omitted.

[0132] In addition, a bearing support 197 for supporting the third bearing 193 and the fourth bearing 194 can be additionally provided between the inner housing portion 60 and the cover portion 90. The rotation adjustment portion 195 can be provided between such a bearing support 197 and the cover portion 90.

[0133] Hereinafter, the flywheel adjustment wheel 10 of the embodiment of the present application and the operation state of the exercise bicycle 1 having the same will be described in detail with reference to the accompanying drawings.

[0134] Figure 11 is a perspective view showing a state in which the second power transmission portion 110 is provided on the side surface of the rotation gear portion 30 of the embodiment of the present application.

[0135] As shown in Figure 1 and Figure 11 , the force for rotating the pedal is transmitted to the pulley 20 through a belt member or the like. The pulley 20 rotates together with the rotation gear portion 30.

[0136] Figure 12 is a perspective view showing a state in which the locking gear portion 130 of the embodiment of the present application is locked to the circular gear 37, Figure 15 is a front view showing a state in which the locking gear portion 130 of the embodiment of the present application is locked to the circular gear 37.

[0137] As shown in Figure 12 and Figure 15 , if the user grasps and rotates the handle portion 120 to use in the non-flywheel mode, the locking gear portion 130 rotates together with the handle portion 120 and is locked to the circular gear 37 of the rotation gear portion 30. Thus, when the pulley 20 is rotated in the reverse direction (counterclockwise direction) with respect to the reference, the power is transmitted to the locking gear portion 130 locked to the circular gear 37. Figure 15 As the locking gear portion 130 is rotatably fixed to the inner housing portion 60, the inner housing portion 60 is reversely rotated together with the locking gear portion 130 by the rotational power transmitted to the locking gear portion 130. In addition, the inner housing portion 60 is connected to the outer housing portion 50, and thus the outer housing portion 50 is also reversely rotated together with the inner housing portion 60.

[0138] As the locking gear portion 130 is rotatably fixed to the inner housing portion 60, the inner housing portion 60 is reversely rotated together with the locking gear portion 130 by the rotational power transmitted to the locking gear portion 130. In addition, the inner housing portion 60 is connected to the outer housing portion 50, and thus the outer housing portion 50 is also reversely rotated together with the inner housing portion 60.

[0139] Thus, asFigure 1 As shown, the freewheel-regulated wheel 10 provided in the frame portion 200 of the exercise bicycle 1 is counter-rotated.

[0140] As shown in Figure 12 and Figure 15 In the case where the pulley 20 is forward-rotated, the rotation gear portion 30 is forward-rotated together with the pulley 20. The rotation gear portion 30 and the inner side housing portion 60 are connected through the first power transmission portion 100. Further, the inner side housing portion 60 is also forward-rotated through the first power transmission main body 101 which is a one-way clutch bearing that transmits only a forward force.

[0141] In the non-freewheel mode, if the pulley 20 is forward-rotated, the freewheel-regulated wheel 10 including the housing portion 40 is forward-rotated, and if the pulley 20 is counter-rotated, the freewheel-regulated wheel 10 including the housing portion 40 is counter-rotated.

[0142] Figure 14 is a cross-sectional view showing the force transmission of the freewheel-regulated wheel 10 of an embodiment of the present application, Figure 16 is a front view showing a state in which the locking gear portion 130 is separated from the circular gear 37 of an embodiment of the present application.

[0143] As shown in Figure 14 and Figure 16 If the user grasps and turns the handle portion 120 to use in the freewheel mode, the locking gear portion 130 is rotated together with the handle portion 120 and separated from the circular gear 37 of the rotation gear portion 30. Therefore, when the pulley 20 is counter-rotated (counterclockwise direction as a reference), the power transmission from the circular gear 37 to the locking gear portion 130 is cut off, so that the inner side housing portion 60 is not rotated. Figure 16 is a cross-sectional view showing the force transmission of the freewheel-regulated wheel 10 of an embodiment of the present application,

[0144] Further, as shown in Figure 4 and Figure 10 In the case where the pulley 20 is forward-rotated, the rotation gear portion 30 is forward-rotated together with the pulley 20. The rotation gear portion 30 and the inner side housing portion 60 are connected through the first power transmission portion 100. Further, the inner side housing portion 60 is also forward-rotated through the first power transmission main body 101 which is a one-way clutch bearing that transmits only a forward force.

[0145] In the freewheel mode, if the pulley 20 is forward-rotated, the freewheel-regulated wheel 10 including the housing portion 40 is forward-rotated, and if the pulley 20 is counter-rotated, the freewheel-regulated wheel 10 including the housing portion 40 is not rotated.

[0146] In the flywheel mode of the present application as described above, only the first power transmission part 100 as a one-way clutch bearing is operated, so that noiseless operation can be achieved. In addition, in the non-flywheel mode, the second power transmission part 110 is operated as a rotation locking structure, so that power can be rapidly transmitted from the rotating gear part 30 to the housing part 40 through the second power transmission part 110.

[0147] In addition, since the mode switching structure for gripping and rotating the handle part 120 by hand is provided, the operation mode can be changed intuitively and easily.

[0148] As described above, according to the present application, since the flywheel function can be selectively used by the operation of the second power transmission part 110, the use convenience of the exercise machine can be improved. In addition, depending on the presence or absence of the flywheel function, the exercise machine can not be purchased separately, so that the purchase cost of the exercise machine can be saved. In addition, the second power transmission part 110 is operated by the user's operation without using an additional driving motor, so that the electricity cost can be saved. In addition, since the second power transmission part 110 is configured as a module and is detachably provided to the housing part 40, the time and cost required for the replacement and repair work of the second power transmission part 110 can be saved. In addition, since the elastic locking part 160 can be inserted into the fixing groove 175 of the power transmission housing 170 and maintained in a stopped state, the operation reliability of the second power transmission part 110 can be improved.

[0149] As described above, the present application has been described with reference to the drawings, but the present application is not limited to the embodiments and drawings disclosed in the present specification, and it is obvious that a person having ordinary skill in the art can make various modifications within the scope of the technical idea of the present application. Also, even when the embodiments of the present application are described in the above, the effects according to the configuration of the present application are not explicitly described, but the effects predictable by the corresponding configuration should be recognized.

Claims

1. A flywheel-regulated wheel, wherein includes: a pulley that rotates by receiving power from the pedal portion; a rotation gear portion that rotates together with the pulley fixed to the outside thereof, and is provided with a circular gear along the outer side periphery thereof; a housing portion that supports the rotation gear portion so as to be rotatable; a first power transmission portion that is connected to the rotation gear portion and the housing portion, supports the rotation gear portion so as to be rotatable, and transmits power transmitted to the rotation gear portion to the housing portion only in the case where the rotation gear portion rotates in the forward direction; and a second power transmission portion that is provided to the housing portion, is engaged to the circular gear by being actuated by an external force, and transmits power transmitted to the rotation gear portion to the housing portion in the case where the rotation gear portion rotates in the reverse direction; the second power transmission portion includes: a power transmission housing that is detachably provided to the housing portion; a handle portion that is rotatably provided to the power transmission housing; and an engagement gear portion that is connected to the handle portion across the power transmission housing, is rotatably provided to the housing portion, rotates together with the handle portion, and is engaged to the circular gear.

2. The flywheel-regulated wheel according to claim 1, wherein the housing portion includes: an outer side housing portion to which the second power transmission portion is detachably provided, the pulley is located on the outside of the outer side housing portion, and the first power transmission portion is located on the inside of the outer side housing portion; and an inner side housing portion that is fixed to the inside of the outer side housing portion, is connected to the first power transmission portion, and supports the second power transmission portion so as to be rotatable.

3. The flywheel-regulated wheel according to claim 2, wherein the inner side housing portion includes: an inner side housing main body that is fixed to the inside of the outer side housing portion, and the rotation gear portion is located at the center portion of the inner side housing main body; a rotation support portion that is provided in a shape protruding from the inner side housing main body and surrounding the first power transmission portion, and supports the rotation gear portion so as to be rotatable; and a first guide portion that forms a groove on the surface on the opposite side to the second power transmission portion, and guides the rotation of the second power transmission portion.

4. The flywheel-regulated wheel according to claim 3, wherein the first guide portion includes: a first guide groove portion that guides the rotation of the engagement gear portion provided to the second power transmission portion, and forms a groove portion in a fan shape on the surface on the opposite side to the engagement gear portion in the inner side housing portion; and a second guide groove portion that is located on the inside of the first guide groove portion, and forms a groove in a circular arc shape along the movement path of the engagement gear portion.

5. The flywheel-regulated wheel according to claim 1, wherein the first power transmission portion includes: a ring-shaped first power transmission main body; a first key member that connects the inside of the first power transmission main body and the outside of the rotation gear portion; and a second key member that connects the outside of the first power transmission main body and the housing portion; the first power transmission main body is constituted by a one-way clutch bearing.

6. The flywheel-regulated wheel according to claim 1, wherein the engagement gear portion includes: A locking gear body connected to the handle portion and rotating together with the handle portion, and engaging with the circular gear; A coupling body coupled to the locking gear body; and An elastic locking portion located inside the locking gear body and the coupling body, and locked to the power transmission housing by elastic force.

7. The flywheel adjustment type wheel according to claim 6, wherein The locking gear body includes: a first body provided with a connection groove into which the handle portion is inserted and locked, and rotatably provided in the housing portion; and a second body extended from the first body, rotating together with the first body and engaging with the teeth of the circular gear, and fastened to the coupling body through the elastic locking portion.

8. The flywheel adjustment type wheel according to claim 6, wherein The elastic locking portion includes: a moving protrusion located at a boundary between the locking gear body and the coupling body, and protruding outward of the locking gear portion; and an elastic member located at the boundary between the locking gear body and the coupling body, and pressing the moving protrusion in a direction toward the outside of the locking gear portion.

9. An exercise bicycle, comprising: a frame portion supporting a seat portion and a handle portion; a pedal portion rotatably provided in the frame portion; a belt wheel rotating by receiving power of the pedal portion; a rotating gear portion rotating together with the belt wheel fixed to the outside thereof, and provided with a circular gear along the outer periphery thereof; a shaft penetrating the rotating gear portion and connected to the frame portion; a housing portion supporting the rotating gear portion so as to be rotatable; a first power transmission portion connected to the rotating gear portion and the housing portion, supporting the rotating gear portion so as to be rotatable, and transmitting power transmitted to the rotating gear portion to the housing portion only when the rotating gear portion is forwardly rotated; and a second power transmission portion provided in the housing portion, locked to the circular gear by being operated by external force, and transmitting power transmitted to the rotating gear portion to the housing portion when the rotating gear portion is reversely rotated; The second power transmission portion includes: a power transmission housing detachably provided in the housing portion; a handle portion rotatably provided in the power transmission housing; and a locking gear portion connected to the handle portion through the power transmission housing, rotatably provided in the housing portion, rotating together with the handle portion, and locked to the circular gear. ​

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