Exercise machine and dual resistance structure combining wind resistance and magnetic resistance thereof

Abstract

A dual resistance structure includes a rotating shaft, a wind resistance unit, and a magnetic resistance unit. The wind resistance unit is fixed to the rotating shaft and includes blades arranged annularly. The magnetic resistance unit includes a magnetic resistance member and a magnetic resistance wheel. The magnetic resistance wheel is fixed to the rotating shaft. The magnetic resistance wheel is spaced apart from the wind resistance unit by a distance in an axial direction of the rotating shaft to form a moving space. The magnetic resistance member is selectively moved into or away from the moving space in a radial direction of the magnetic resistance wheel to adjust a magnetic resistance of the magnetic resistance wheel. Part of the magnetic resistance member is movable in the moving space when the magnetic resistance member is moved in the radial direction. The dual resistance structure is mounted on an exercise machine.

Claims

1. A dual resistance structure combining wind resistance and magnetic resistance, comprising: a rotating shaft, and a first mounting plate and a second mounting plate affixed to the rotating shaft in axially-spaced relationship; a wind resistance unit including a turning disc fixed to the first mounting plate of the rotating shaft and including a plurality of blades arranged annularly thereon, the plurality of blades being fixed to the turning disc; and a magnetic resistance unit including a magnetic resistance member and a magnetic resistance wheel, the magnetic resistance member including a first portion, an opposing second portion, and a connecting portion connecting the first portion and the second portion, the magnetic resistance wheel being fixed to the second mounting plate of the rotating shaft, wherein a diameter of the turning disc is lesser than a diameter of the magnetic resistance wheel, the plurality of blades of the wind resistance unit extending in the radial direction beyond the magnetic resistance wheel, the magnetic resistance wheel being spaced apart from the wind resistance unit by a distance in the axial direction of the rotating shaft to form an open moving space between the wind resistance unit and the magnetic resistance wheel, the open moving space being unobstructed during rotation of the magnetic resistance wheel, and the second portion of the magnetic resistance member being thereby selectively moveable into or away from the open moving space in an arcuate path intersecting a perimeter portion of the magnetic resistance wheel to adjust a magnetic resistance of the magnetic resistance wheel, wherein the second portion of the magnetic resistance member is in direct-adjacent relationship with respect to the plurality of blades of the wind resistance unit.

2. The dual resistance structure combining wind resistance and magnetic resistance as claimed in claim 1, wherein a groove is formed on either one of the first portion or the second portion of the magnetic resistance member, either one of the first portion or the second portion is provided with a magnetic member, and the second portion is movable in the open moving space when the groove is selectively moved into or out of the magnetic resistance wheel.

3. The dual resistance structure combining wind resistance and magnetic resistance as claimed in claim 1, wherein a periphery of the turning disc has a plurality of engaging grooves each of which is recessed in the radial direction, each of the plurality of blades has a coupling end, the coupling end has an L-shaped notch and a fixing piece extending from a periphery of the L-shaped notch, the L-shaped notch and the fixing piece are formed by stamping, each of the plurality of blades further has an engaging block extending in the radial direction, the fixing piece of each of the plurality of blades is locked to the turning disc, and the engaging block of each of the plurality of blades is engaged in the respective engaging groove, each of the plurality of blades is thereby fixed to the turning disc.

4. The dual resistance structure combining wind resistance and magnetic resistance as claimed in claim 1, wherein the first portion and the second portion of the magnetic resistance member each having at least one magnetic member, and wherein the magnetic resistance member is pivotally connected relative to the magnetic resistance wheel at a position spaced from a perimeter of the magnetic resistance wheel, the magnetic resistance member is thereby pivoted to change an overlaying surface area of the at least one magnetic member of the first and second portions with respect to the magnetic resistance wheel to thereby vary a magnetic braking effect.

5. An exercise machine having a dual resistance structure combining wind resistance and magnetic resistance, comprising: an exercise machine body having a control unit; a rotating shaft disposed on the exercise machine body, and a first mounting plate and a second mounting plate affixed to the rotating shaft in axially-spaced relationship; a wind resistance unit including a turning disc fixed to the first mounting plate of the rotating shaft and including a plurality of blades arranged annularly thereon, the plurality of blades being fixed to the turning disc; and a magnetic resistance unit including a magnetic resistance member and a magnetic resistance wheel, the magnetic resistance member including a first portion, an opposing second portion, and a connecting portion connecting the first portion and the second portion, and the first and second portions each having at least one magnetic member, the magnetic resistance wheel being fixed to the second mounting plate of the rotating shaft, wherein a diameter of the turning disc is lesser than a diameter of the magnetic resistance wheel, the plurality of blades of the wind resistance unit extending in the radial direction beyond the magnetic resistance wheel, the magnetic resistance member being pivotally connected to the exercise machine body at a position spaced from a perimeter of the magnetic resistance wheel and connected to the control unit, wherein the magnetic resistance member is pivoted to change an overlaying surface area of the at least one magnetic member of the first and second portions with respect to the magnetic resistance wheel to thereby vary a magnetic braking effect, the magnetic resistance wheel being spaced apart from the wind resistance unit by a distance in the axial direction of the rotating shaft to form an open moving space between the wind resistance unit and the magnetic resistance wheel, the open moving space being unobstructed during rotation of the magnetic resistance wheel, and the second portion of the magnetic resistance member being thereby selectively moveable into or away from the open moving space in an arcuate path intersecting a perimeter portion of the magnetic resistance wheel to adjust a magnetic resistance of the magnetic resistance wheel, wherein the second portion of the magnetic resistance member is in direct-adjacent relationship with respect to the plurality of blades of the wind resistance unit.

6. The exercise machine as claimed in claim 5, wherein a groove is formed on either one of the first portion or the second portion of the magnetic resistance member, and the second portion is movable in the open moving space when the groove is selectively moved into or out of the magnetic resistance wheel.

7. The exercise machine as claimed in claim 5, wherein a periphery of the turning disc has a plurality of engaging grooves each of which is recessed in the radial direction, each of the plurality of blades has a coupling end, the coupling end has an L-shaped notch and a fixing piece extending from a periphery of the L-shaped notch, the L-shaped notch and the fixing piece are formed by stamping, each of the plurality of blades further has an engaging block extending in the radial direction, the fixing piece of each of the plurality of blades is locked to the turning disc, and the engaging block of each of the plurality of blades is engaged in the respective engaging groove, each of the plurality of blades is thereby fixed to the turning disc.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is an exploded view of the dual resistance structure combining wind resistance and magnetic resistance of the present invention;

(2) FIG. 2 is a perspective view of the dual resistance structure combining wind resistance and magnetic resistance of the present invention;

(3) FIG. 3 is a cross-sectional view of the dual resistance structure combining wind resistance and magnetic resistance of the present invention;

(4) FIG. 4 is a perspective view of the exercise machine having an dual resistance structure combining wind resistance and magnetic resistance of the present invention;

(5) FIG. 5 is a side view of the dual resistance structure combining wind resistance and magnetic resistance of the present invention;

(6) FIG. 5A is another perspective view of the dual resistance structure combining wind resistance and magnetic resistance of the present invention;

(7) FIG. 6 is a top view of the dual resistance structure combining wind resistance and magnetic resistance of the present invention;

(8) FIG. 7 is a side view illustrating the magnetic resistance member being operated to enter the moving space when in use; and

(9) FIG. 8 is a top view illustrating the magnetic resistance member being operated to enter the moving space when in use.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(10) Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

(11) As shown in FIG. 1 through FIG. 3, the present invention discloses a dual resistance structure combining wind resistance and magnetic resistance comprises a rotating shaft 1, a wind resistance unit 2, a magnetic resistance unit 3, and a plurality of screws A. The rotating shaft 1 rotates about an axial direction X, and includes a first mounting plate 110 and a second mounting plate 120 affixed to the rotating shaft 1 in axially-spaced relationship, as shown in FIG. 1. The wind resistance unit 2 includes a turning disc 22. The turning disc 22 is locked to the first mounting plate 110 of the rotating shaft 1 with the screws A, as shown in FIG. 1. The periphery of the turning disc 22 has a plurality of engaging grooves each recessed in a radial direction Y. The wind resistance unit 2 further includes a plurality of blades 21 arranged annularly. The blades 21 extend in the radial direction Y. Each of the blades 21 has a coupling end 211. The coupling end 211 has an L-shaped notch 212 and a fixing piece 213 extending from the periphery of the L-shaped notch 212. The L-shaped notch and the fixing piece 213 are formed by stamping. Each of the blades 21 further has an engaging block 214 extending in the radial direction Y. The fixing piece 213 of each of the blades 21 is connected to the turning disc 22 by the screw A, and the engaging block 214 is engaged in the engaging groove 221, so that the each of the blades 21 is fixed to the turning disc 22. The magnetic resistance unit 3 includes a magnetic resistance member 31 and a magnetic resistance wheel 32. The magnetic resistance wheel 32 is locked to the second mounting plate 120 of the rotating shaft 1 with the screws A, as shown in FIG. 1. All the blades 21 extend in the radial direction Y beyond the magnetic resistance wheel 32. The diameter of the turning disc 22 is less than the diameter of the magnetic resistance wheel 32. The magnetic resistance wheel 32 is spaced apart from the wind resistance unit 2 by a distance D in the axial direction X of the rotating shaft 1 to form a moving space 33. The magnetic resistance member 31 includes a first portion 311, an opposing second portion 312, and a connecting portion 313 connecting the first portion 311 and the second portion 312. A groove 34 is defined among the first portion 311, the second portion 312 and the connecting portion 313. The first portion 311 or/and the second portion 312 is provided with a magnetic member 314. In this embodiment, the magnetic member 314 is provided on both the first portion 311 and the second portion 312. For example, the magnetic member 314 is three permanent magnets provided on the first portion 311 and the second portion 312. The magnetic members 314 of the first portion 311 and the second portion 312 correspond to each other. The first portion 311 and the second portion 312 of the magnetic resistance member 31 can be moved synchronously in the radial direction Y of the magnetic resistance wheel 32. The second portion 312 is movable in the moving space 33, so that the magnetic resistance member 31 is selectively moved into or away from the magnetic resistance wheel 32 to adjust a magnetic resistance of the magnetic resistance wheel 32.

(12) As shown in FIG. 4 and FIG. 5A, the present invention further discloses an exercise machine. The dual resistance structure combining wind resistance with magnetic resistance is mounted on an exercise machine body 4. The exercise machine further includes a control unit 5. The control unit 5 is fixed on the exercise machine body 4. The control unit 5 is configured to operate the magnetic member 31 through a cable 6. The magnetic resistance member 31 is pivotally connected to the exercise machine body 4.

(13) For the wind resistance structure, please refer to FIG. 5 and FIG. 6. When the rotating shaft 1 rotates, the rotating disc 22 and the magnetic resistance wheel 32 are driven to rotate, and the blades 21 on the rotating disc 22 are rotated to generate a wind resistance. The magnitude of the wind resistance will be affected by the size of the blades 21. The blades 21 extend outwardly beyond the magnetic resistance wheel 32. Because the length of the blades 21 is long, the resistance generated by rotation of the wind resistance unit 2 is large, thereby providing an exercising effect through the wind resistance.

(14) For the magnetic resistance structure, please refer to FIG. 5, FIG. 5A, and FIG. 6. The control unit 5 pulls a driving block 7 through the cable 6. One end of the cable 6 is connected to the driving block 7, and the other end of the cable 6 is connected to the control unit 5. (The control unit 5 is not shown in FIG. 5A). The driving block 7 is fixed to a shaft member 8. The shaft member 8 is rotatably pivotally connected to the exercise machine body 4. The magnetic resistance member 31 is also fixed to the shaft member 8, so that the magnetic resistance member 31 and the driving block 7 are rotated synchronously with the shaft member 8 as the axis. Furthermore, a spring 9 is disposed between the exercise machine body 4 and the magnetic resistance member 31 to provide the magnetic resistance member 31 a return elastic force. Through the cable 6 to pull the driving block 7, the magnetic resistance member 31 and the driving block 7 are moved synchronously to approach magnetic resistance wheel 32 with the shaft 8 as the axis, and the spring 9 is stretched. If the cable 6 is released, the spring 9 will pull the magnetic resistance member 31 and the driving block 7 away from the magnetic resistance wheel 32 synchronously. When the magnetic resistance member 31 of the magnetic resistance unit 3 is moved toward the magnetic resistance wheel 32, the second portion 312 of the magnetic resistance member 31 moves freely in the moving space 33, and the magnetic resistance wheel 32 is located in the groove 34. In the state shown FIG. 5 and FIG. 6, only part of the magnetic member 314 is moved into the magnetic resistance wheel 32. At this time, the magnetic resistance of the magnetic resistance wheel 32 is smaller.

(15) Please refer to FIG. 5A, FIG. 7 and FIG. 8. When it is necessary to increase the magnetic resistance, the magnetic resistance member 31 is pulled by the cable 6, and the magnetic resistance member 31 is moved in the radial direction Y (as shown in FIG. 1) toward the magnetic resistance wheel 32. At this time, the second portion 312 of the magnetic resistance member 31 is still movable in the moving space 33 freely. In the state shown in FIG. 7 and FIG. 8, all the magnetic members 314 are moved into the area where the magnetic resistance wheel 32 is located. Tt this time, the magnetic resistance of the magnetic resistance wheel 32 is larger. When it is necessary to reduce the magnetic resistance, the cable 6 can be released, so that the spring 9 pulls the magnetic resistance member 31 and the driving block 7 away from the magnetic resistance wheel 32 synchronously, and part of the magnetic member 314 leaves the area where the magnetic resistance wheel 32 is located to reduce the magnetic resistance.

(16) Referring to FIG. 4, when the user performs training on the exercise machine body 4, he/she can step on the pedals of exercise machine body 4 to rotate the rotating shaft 1 for exercise. The control unit 5 controls the magnetic resistance unit 3 to operate as described above, so as to adjust the resistance during training.

(17) Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.