JP2011251051A - Resisting device for exercise equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resisting device for exercise equipment that has a wide range of load resistance.SOLUTION: The resisting device includes: a receiving base for supporting a driving rotary shaft 6 manually rotatable; associating magnets 15 and 16 mounted to the receiving base on the outer periphery of a rotation axis 6a of the driving rotary shaft 6; a flywheel 9 rotating with the driving rotary shaft 6; and a rotating plate 10 rotating with the driving rotary shaft 6 between the associating magnets 15 and 16 and the flywheel 9, and passing through magnetic field lines generated between the association magnets 15 and 16 and the flywheel 9. The associating magnets 15 and 16 are movably and adjustably supported at the receiving base so that the radial distances of the associating magnets 15 and 16 are changed relative to the rotation axis 6a, and the sum of axial distances W from sectional surfaces 31 and step surfaces 32 to the associating magnets 15 and 16 are variously changed. The flywheel 9 is used as an electrical conductor to miniaturize the resisting device, and various combinations of the relative positional relationships between the plurality of associating magnets 15 and 16 are only required to widen the range of load resistance by an electromagnetic brake function.

Description

  The present invention relates to a resistance device that applies a load due to an electromagnetic brake action by an eddy current generated by a magnetic line of force acting on a rotating electrical conductor that can be rotated by human power in various exercise equipment.

  Conventionally, in the resistance device for exercise equipment disclosed in Patent Document 1 below, a flywheel is disposed on one end side of both ends of a drive rotation shaft that can be rotated by human power, and on the other end side. Is provided with a load applying mechanism for applying a load by the electromagnetic brake action. However, there has been a problem that the resistance device for exercise equipment is enlarged due to the flywheel and the load applying mechanism arranged separately at both ends of the drive rotating shaft. Therefore, a miniaturized resistance device for exercise equipment that applies a load due to the electromagnetic brake action is disclosed in Patent Document 2 below.

JP 2002-263212 A JP 2009-297086 A

  The devices currently on the market, including the resistance devices for exercise equipment disclosed in Patent Documents 1 and 2 above, have a narrow load resistance range, so exercises that require a large load resistance or exercises that require a small load resistance There is a problem that lacks versatility because it is necessary to prepare for each exercise purpose.

  An object of the present invention is to provide a resistance device for exercise equipment having a wide load resistance range.

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 8) of the embodiments described later.
The resistance device for exercise equipment according to the invention of claim 1 is attached to the support body 5 on the outer periphery of the rotation center line 6a of the drive rotation shaft 6 and the support rotation shaft 6 that can be rotated by human power. The magnets 15 and 16, the flywheel 9 that rotates with the drive rotation shaft 6, and the magnets 15 and 16 and the flywheel 9 rotate between the magnets 15 and 16 and the flywheel 9 by rotating with the drive rotation shaft 6. And a rotating electrical conductor 10 that passes through the lines of magnetic force generated between the electrical conductor surfaces 31 and 32. The magnet includes a plurality of magnets 15 and 16 whose relative positional relationship can be changed by movable means 13, 14, 20, 21, 22, 23, 24, 25, 26. For example, the magnets 15 and 16 can change the relative positional relationship in conjunction with each other.

  In the invention of claim 1, since the flywheel 9 is also used as an electric conductor for generating magnetic lines of force between the magnets 15 and 16, the load applying mechanism M for applying a load by an electromagnetic brake action can be simplified. Moreover, the load resistance range can be expanded by variously changing the load resistance due to the electromagnetic brake action only by combining various relative positional relationships of the plurality of magnets 15 and 16.

  In the invention of claim 2 premised on the invention of claim 1, by changing the relative positional relationship between the magnets 15, 16, the magnets 15, 16 and the electric conductor surfaces 31, 32 of the flywheel 9 are changed. The sum of the rotation center line direction distance W in between can be changed. In the invention of claim 2, the load resistance range can be expanded by variously changing the sum of the rotation center line direction distances W by variously combining the relative positional relationships of the plurality of magnets 15 and 16.

  In the invention of claim 3 based on the invention of claim 1 or claim 2, the magnets 15 and 16 are supports so that the radial distance L relative to the rotation center line 6a of the drive rotating shaft 6 can be changed. 5 is supported by movable means so as to be movable. In the invention of claim 3, the radial distance L between the magnets 15, 16 is changed to change the rotation center line direction distance W between the magnets 15, 16 and the electric conductor surfaces 31, 32 of the flywheel 9. With a simple configuration, the load can be adjusted.

  In the invention of claim 4 premised on the invention of claim 3, the movable means has a maximum resistance state F1 having a relative positional relationship between the magnets 15 and 16 in which the sum of the rotation center line direction distances W is minimized. And a switching operation unit 26 capable of sequentially changing the resistance from one to the other of the minimum resistance state F3 having the relative positional relationship between the magnets 15 and 16 that are the largest. According to the fourth aspect of the present invention, the switching operation unit 26 can select the optimum load in the load resistance range by sequentially changing the resistance between the maximum resistance state F1 and the minimum resistance state F3.

  A fifth aspect of the invention based on the fourth aspect of the invention, wherein the movable means is a plurality of levers that can rotate around an axis 12a that is eccentric in the radial direction with respect to the rotation center line 6a of the drive rotary shaft 6. 13, 14, an interlocking member 20 that can be rotated around the rotation center line 6 a of the drive rotating shaft 6 by the switching operation unit 26, and a cam mechanism provided between the interlocking member 20 and the levers 13, 14. Parts 21, 22, 23, and 24, and the magnets 15 and 16 are attached to the levers 13 and 14, and the switching operation part 26 connects the interlocking member 20 and the cam mechanism parts 21, 22, 23, and 24. Thus, the levers 13 and 14 can be rotated in conjunction with each other to change the radial distance L of the magnets 15 and 16 with respect to the rotation center line 6a of the drive rotary shaft 6. In the invention of claim 5, the radial distance L of the magnets 15 and 16 with respect to the rotation center line 6a of the drive rotating shaft 6 can be easily changed with a simple configuration.

  A magnetic shield between the magnets 15 and 16 and the electric conductor surfaces 31 and 32 of the flywheel 9 in the invention of claim 6 premised on the invention of any one of claims 2 to 5. A body 30 was provided. For example, the magnetic shield body 30 is detachably provided together with the flywheel 9 and the rotating electrical conductor 10. In the invention of claim 6, the magnetic shield body 30 can absorb the magnetic flux and reduce the load.

Next, technical ideas other than the claims will be described with reference to the reference numerals in the drawings of the embodiments.
In the seventh invention based on the invention of any one of claims 2 to 6, the rotating electrical conductor 10 is arranged on the outer periphery of the rotation center line 6a of the drive rotating shaft 6 and its rotation center line 6a. It has a through hole 29 penetrating in the direction. For example, the plurality of through holes 29 are arranged in a ring shape on the outer periphery of the rotation center line 6 a of the drive rotation shaft 6. In the seventh invention, since the lines of magnetic force pass through the through holes 29, the load resistance of the rotating electrical conductor 10 is reduced by the through holes 29, and between the inner and outer circumferences of the rotating electrical conductor 10 depending on the presence or absence of the through holes 29. The load resistance difference can be increased.

  In the invention according to any one of claims 2 to 6 or the eighth invention based on the seventh invention, the electric conductor surfaces 31 and 32 of the flywheel 9 are provided on the drive rotary shaft 6. As the radial distance L to the rotation center line 6a decreases, the rotation center line direction distance W to the magnets 15 and 16 increases in a plurality of steps or steplessly. In the eighth aspect of the invention, the outer periphery of the flywheel 9 that is far from the rotation center line 6a side due to the change in the shape of the electric conductor surfaces 31 and 32 in which the rotation center line direction distance W with respect to the magnets 15 and 16 that can move in the radial direction varies. The function as the flywheel 9 can be enhanced by increasing the weight on the side.

  In the invention of any one of claims 2 to 6, or the ninth invention based on the seventh or eighth invention, the electric conductor surfaces 31, 32 of the flywheel 9 are The drive rotation shaft 6 is formed in an annular shape around the rotation center line 6a. In the ninth aspect of the invention, a load can be continuously applied by the lines of magnetic force generated between the electric conductor surfaces 31 and 32 and the magnets 15 and 16 during the rotation of the flywheel 9.

  The electric conductor of the flywheel 9 according to any one of claims 2 to 6, or a tenth invention based on the seventh invention, the eighth invention or the ninth invention. The surface is formed by arranging a plurality of concentric annular screens 31 centering on the rotation center line 6a of the drive rotating shaft 6 in the radial direction to form a stepped surface 32 between the two adjacent screens 31. is there. In the tenth invention, the load can be continuously applied by the magnetic lines generated between the electric conductor surfaces 31 and 32 and the magnets 15 and 16 during the rotation of the flywheel 9. Moreover, the electrical conductor surfaces 31 and 32 in which the rotation center line direction distance W with respect to the magnets 15 and 16 that can move in the radial direction in the flywheel 9 can be easily formed.

  According to the present invention, it is possible to effectively reduce the size of the resistance device 1 for exercise equipment that effectively uses the flywheel 9 as an electric conductor for generating magnetic lines of force between the magnets 15 and 16 and applies a load due to an electromagnetic brake action. In addition, the resistance device 1 for exercise equipment having a wide load resistance range can be provided.

(A) is a use condition figure which shows roughly the bicycle exercise equipment which installed the resistance apparatus concerning this embodiment, (b) is a partially notched front view which shows only the said resistance apparatus. It is a partially broken partial front view of the resistance device in the maximum resistance state. (A) is sectional drawing which cut | disconnected the maximum resistance state of the said resistance apparatus by the A1-A1 line | wire of FIG. 2, and was seen from the side surface side, (b) was similarly cut | disconnected by the A2-A2 line | wire of FIG. It is sectional drawing seen from the side. It is a partially broken partial front view of the resistance device in an intermediate resistance state. (A) is sectional drawing which cut | disconnected the intermediate resistance state of the said resistance apparatus by the B1-B1 line | wire of FIG. 4, and was seen from the side surface side, (b) was similarly cut | disconnected by the B2-B2 line | wire of FIG. It is sectional drawing seen from the side. It is a partially broken partial front view of the said resistance apparatus in a minimum resistance state. (A) is sectional drawing which cut | disconnected the minimum resistance state of the said resistance apparatus by the C1-C1 line | wire of FIG. 6, and was seen from the side surface side, (b) was similarly cut | disconnected by the C2-C2 line | wire of FIG. It is sectional drawing seen from the side. (A) is sectional drawing which shows the rotary plate cut | disconnected by the DD line | wire of FIG.2, FIG.4 or FIG.6 and was seen from the side surface side, (b) is sectional drawing which similarly shows a flywheel.

Hereinafter, a resistance device for exercise equipment according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1A, the resistance device 1 is attached to a cradle 5 as a support shown in FIG. 1B with respect to a bracket 4 installed to support a rear wheel 3 of a bicycle 2. ing. The driving rotary shaft 6 shown in FIGS. 2 and 3 is supported by the pedestal 5 so that the roller 7 can rotate integrally with the driving rotary shaft 6 around the rotation center line 6a. It is supported. The rear wheel 3 of the bicycle 2 is applied to the roller 7. The case 8 provided on one side of the cradle 5 has a peripheral wall 8a and an end wall 8b as shown in FIG. 3A, and one end side of the drive rotating shaft 6 is an end wall of the case 8. It protrudes from 8b. A flywheel 9 made of a metal such as stainless steel, which is an electric conductor, is fitted and supported on one end side of the drive rotary shaft 6, and as a rotating electric conductor made of a metal such as aluminum which is an electric conductor. The rotary plate 10 is fitted and supported between the inside of the flywheel 9 and the end wall 8 b of the case 8, and the flywheel 9 and the rotary plate 10 are attached to the end wall 8 b side of the case 8 by fastening screws 11. Can be rotated together with the drive rotation shaft 6 around the rotation center line 6a. The flywheel 9 and the rotating plate 10 can be attached to and detached from the one end side of the drive rotating shaft 6 by loosening the fastening screw 11. A load applying mechanism M is disposed among the case 8, the flywheel 9, and the rotating plate 10. Next, the load applying mechanism M will be described in detail.

  In the case 8, a pair of support shafts 12 having an axis 12 a that is eccentric in the radial direction and is parallel to the rotation center line 6 a at a 180 ° point symmetric position with respect to the rotation center line 6 a of the drive rotation shaft 6 are supported. The levers 13 and 14 (movable means) are rotatably supported around the axis 12a of the support shaft 12. Interlocking magnets 15 and 16 (permanent magnets) are attached to one end portions of the levers 13 and 14, respectively. The interlocking magnets 15 and 16 have circular end surfaces 17 and 18. The end wall 8b of the case 8 is formed with an arc-shaped long hole 19 centering on the axis 12a of the support shaft 12, and the end surfaces 17, 18 of the interlocking magnets 15, 16 are exposed from the long hole 19. .

  In the case 8, an interlocking plate 20 (movable means) as an interlocking member is rotatably supported around the rotation center line 6a of the drive rotating shaft 6, and a pair of cam mechanism portions is supported on the interlocking plate 20. Cam grooves 21 and 22 (movable means) are formed. Cam rollers 23 and 24 (movable means) as cam mechanisms are attached to the other ends of the levers 13 and 14, respectively. One cam groove 21 is spaced from the rotation center line 6a continuously by a groove portion 21a extending in an arc shape around the rotation center line 6a at a position close to the drive rotation shaft 6, and the groove portion 21a and the communication portion 21c. And a groove portion 21b extending in the manner described above. The cam roller 23 of one lever 13 is engaged with the cam groove 21. The other cam groove 22 has a groove portion 22a extending in an arc shape centered on the rotation center line 6a at a position far from the drive rotation shaft 6, and the groove portion 22a and the communication portion 22c continuously approach the rotation center line 6a. The groove portion 22b extends in such a manner. The cam roller 24 of the other lever 14 is engaged with the cam groove 22.

  A tube 25 (movable means) connected to the peripheral wall 8a of the case 8 is connected to a remote control knob 26 (movable means) as a switching operation portion shown in FIG. 1B, and the wire inserted into the tube 25. One end of 25a is connected to the interlocking plate 20, and the other end of the wire 25a is connected to a switching mechanism (not shown) provided in the remote control knob 26. By operating the remote control knob 26, the interlocking plate 20 is rotated via the wire 25a, and the levers 13 and 14 are rotated together with the interlocking magnets 15 and 16 via the cam grooves 21 and 22 and the cam rollers 23 and 24. .

  The outer peripheral edge of the rotary plate 10 has a circular shape along the inner side of the outer peripheral edge of the flywheel 9, and the rotary plate 10 is surrounded by the outer peripheral edge on both sides in the direction of the rotation center line 6 a of the drive rotary shaft 6. End surfaces 27 and 28 are formed, and a plurality of through holes 29 penetrating between the both end surfaces 27 and 28 are arranged in an annular shape near the drive rotating shaft 6 at equal angular intervals. One end face 27 of both end faces 27 and 28 of the rotating plate 10 faces the end faces 17 and 18 of the interlocking magnets 15 and 16 with a gap G therebetween.

  Between one end surface 27 of the rotating plate 10 and the end wall 8b of the case 8, a magnetic shield body 30 such as iron is inserted into the outer periphery of the drive rotating shaft 6 to block a part of each through hole 29. Yes. The magnetic shield body 30 can also be attached to and detached from the one end side of the drive rotating shaft 6 together with the flywheel 9 and the rotating plate 10 by loosening the fastening screw 11.

  On the inner end surface surrounded by the outer peripheral edge of the flywheel 9, a plurality of section screens 31 as electric conductor surfaces having a concentric annular shape centering on the rotation center line 6 a of the drive rotating shaft 6 are arranged in parallel in the radial direction. A step surface 32 is formed as an electric conductor surface between the adjacent screens 31, and the other end surface 28 of the both end surfaces 27, 28 of the rotating plate 10 faces the respective screens 31 with a gap S therebetween. ing. The rotation center line direction distance W formed by each section screen 31 with respect to the magnet moving surface H passing through the end faces 17 and 18 of the interlocking magnets 15 and 16 and orthogonal to the rotation center line 6a of the drive rotation shaft 6 is the drive rotation. As the radial distance L formed by the rotation center line 6a of the shaft 6 and the center lines 17a and 18a of the end faces 17 and 18 of the interlocking magnets 15 and 16 decreases, the distance increases in a plurality of steps.

  As shown in FIGS. 2 and 3, when the remote control knob 26 is switched to the maximum resistance state F1, the interlocking plate 20 is rotated together with the cam grooves 21 and 22 by the elastic force of the return spring (not shown), and the cam roller 23 is moved. The cam groove 21 is positioned at the end portion of the groove portion 21 a, the cam roller 24 is positioned at the end portion of the groove portion 22 b by the cam groove 22, and the lever 13 and the lever 14 rotate about the support shaft 12. Therefore, both the interlocking magnet 15 attached to the lever 13 and the interlocking magnet 16 attached to the lever 14 are located at the outer end portion of the long hole 19, and the radial distance L relative to the rotation center line 6 a of the drive rotating shaft 6. Is held at the maximum separation position P at which the maximum becomes.

  As shown in FIGS. 4 and 5, when the remote control knob 26 is switched from the maximum resistance state F1 to the intermediate resistance state F2, the interlocking plate 20 resists the elastic force of the return spring (not shown) and the cam grooves 21 and 22 are engaged. The cam roller 23 moves relative to the cam groove 21 in an arc shape from the end of the groove 21a toward the groove 21b and is positioned at the communication portion 21c. The cam roller 24 is the cam groove 22 and the end of the groove 22b. Is moved relative to the groove portion 22 a and positioned at the communication portion 22 c, and only the lever 14 rotates about the support shaft 12. Therefore, the interlocking magnet 15 attached to the lever 13 is held at the maximum separation position P, but the interlocking magnet 16 attached to the lever 14 is arcuate from the outer end to the inner end along the long hole 19. It moves and is held at the minimum separation position Q where the radial distance L with respect to the rotation center line 6a of the drive rotation shaft 6 is minimized.

  As shown in FIGS. 6 and 7, when the remote control knob 26 is switched from the intermediate resistance state F2 to the minimum resistance state F3, the interlocking plate 20 resists the elastic force of the return spring (not shown) and the cam grooves 21 and 22 are engaged. And the cam roller 23 is moved relative to the end of the groove portion 21b by the cam groove 21 and moved relative to the end portion of the groove portion 21b, and the cam roller 24 is moved relative to the cam groove 22 from the communication portion 22c in an arc shape. Only the lever 13 rotates around the support shaft 12. Therefore, the interlocking magnet 16 attached to the lever 14 is held at the minimum separation position Q, but the interlocking magnet 15 attached to the lever 13 is arcuate from the outer end portion to the inner end portion along the long hole 19. It moves and is held at the minimum separation position Q where the radial distance L with respect to the rotation center line 6a of the drive rotation shaft 6 is minimized.

  On the other hand, when the switching operation of the remote control knob 26 described above is released, the interlocking plate 20 is rotated by the elastic force of the return spring (not shown), and the maximum resistance state F1 passes from the minimum resistance state F3 to the intermediate resistance state F2. Can be switched to.

  Now, when the roller 7 on the cradle 5 is rotated by the rear wheel 3 of the bicycle 2, the flywheel 9 and the rotating plate 10 are rotated together with the drive rotating shaft 6, and each interlocking magnet 15, 16 and each section screen 31 of the flywheel 9 are rotated. The rotating plate 10 passes through the magnetic lines of force generated between the step surfaces 32. When the lines of magnetic force act on the rotating plate 10, an eddy current is generated in the rotating plate 10 and a load due to the electromagnetic brake action is applied. The load acts as a resistance of the person who rotates the rear wheel 3 of the bicycle 2. Further, when each of the interlocking magnets 15, 16 is moved and adjusted in the radial direction to change the radial distance L of each of the interlocking magnets 15, 16 with respect to the rotation center line 6 a of the drive rotating shaft 6, each section screen 31 and each of the flywheel 9 is changed. Since the rotation center line direction distance W between the step surface 32 and each interlocking magnet 15, 16 is changed and the magnetic flux density is changed, the load resistance of the rotating plate 10 changes.

  Therefore, the load resistance of the rotating plate 10 increases as the radial distance L between the interlocking magnets 15 and 16 increases and the rotation center line direction distance W decreases, and as the rotational speed of the rotating plate 10 increases. On the other hand, the load resistance of the rotating plate 10 decreases as the radial distance L between the interlocking magnets 15 and 16 decreases and the rotation center line direction distance W increases, and as the rotational speed of the rotating plate 10 decreases. Since the sum of the rotation center line direction distances W becomes maximum in the maximum resistance state F1 and becomes minimum in the minimum resistance state F3, the load resistance of the rotating plate 10 between the maximum resistance state F1 and the minimum resistance state F3. Can be changed.

  Since the rotary plate 10 has a plurality of through holes 29 arranged in an annular shape in the vicinity of the drive rotary shaft 6, eddy currents due to magnetic lines are less likely to be generated in the respective through holes 29, and a load caused by the electromagnetic brake action. Decrease. Further, since the magnetic shield body 30 such as iron is inserted into the rotating plate 6 on the rotary plate 10, the magnetic shield body 30 absorbs the magnetic flux and the load is reduced.

This embodiment has the following effects.
* Since the flywheel 9 has a function as an electric conductor for generating magnetic lines of force between the interlocking magnets 15 and 16 as well as the original function of the flywheel 9, the flywheel 9 is also used. The load applying mechanism M that applies a load due to the electromagnetic brake action can be simplified, and the resistance device 1 for exercise equipment can be reduced in size.

  * Just by combining various relative positional relationships of multiple interlocking magnets 15 and 16, various changes can be made to the sum of rotation center line direction distances W in each interlocking magnet 15 and 16 to widen the load resistance range due to electromagnetic brake action. Can do.

  * By changing the radial distance L of each interlocking magnet 15, 16 to change the rotation center line direction distance W between each interlocking magnet 15, 16 and the section screen 31, 32 of the flywheel 9, The load can be adjusted.

  * The remote control knob 26 can select the optimum load in the load resistance range by sequentially changing the resistance among the maximum resistance state F1, the intermediate resistance state F2, and the minimum resistance state F3 in three stages.

  * The rotation center line of the drive rotary shaft 6 has a simple structure including the levers 13 and 14, the interlocking plate 20, the cam mechanism (cam grooves 21 and 22 and cam rollers 23 and 24), and the remote control knob 26. The radial distance L of the interlocking magnets 15 and 16 with respect to 6a can be easily changed.

* Magnetic flux can be absorbed by the magnetic shield body 30 to further reduce the load in the minimum resistance state F3.
For example, the following embodiment may be configured as follows.

  In the above embodiment, the interlocking magnets 15 and 16 are attached to the pair of levers 13 and 14, but the interlocking magnets are attached to three or more levers, and various combinations of the relative positional relationships of the three or more interlocking magnets are changed. Also good.

The relative positional relationship between the interlocking magnets 15 and 16 may be changed by moving the interlocking magnets 15 and 16 separately without being interlocked with each other.
As for the electric conductor surface of the flywheel 9, as shown in FIGS. 2, 4, and 6, the direction of the rotation center line relative to the interlocking magnets 15, 16 decreases as the radial distance L with respect to the rotation center line 6 a of the drive rotation shaft 6 decreases. In addition to forming each section screen 31 and each step surface 32 so that the distance W increases in a plurality of steps, the inclined surface 33 is formed so that the rotation center line direction distance W increases steplessly.

  As for the electric conductor surface of the flywheel 9, the rotational center line direction distance W relative to the interlocking magnets 15, 16 increases as the radial distance L with respect to the rotational center line 6 a of the drive rotating shaft 6 increases, contrary to the above embodiment. It is formed so as to increase in multiple steps or steplessly.

-The entire flywheel 9 is not formed with an electric conductor, but an annular electric conductor is embedded in the inner end face of the flywheel 9 or a plurality of electric conductors are embedded at equal angular intervals.
Without embedding the entire rotating plate 10 with an electric conductor, an annular electric conductor is embedded in the outer peripheral portion of the rotating plate 10 facing the interlocking magnets 15 and 16 as the rotating plate 10 rotates, or a plurality of electric conductors are used. Embed at angular intervals.

The flywheel 9 and the rotating plate 10 are not provided separately from each other, but are integrally formed of the same material.
-The through holes 29 are omitted from the rotating plate 10.

  DESCRIPTION OF SYMBOLS 5 ... Support body, 6 ... Drive rotating shaft, 6a ... Center of rotation, 9 ... Flywheel, 10 ... Rotating electrical conductor, 12a ... Axis center, 13, 14 ... Lever, 15, 16 ... Interlocking magnet, 20 ... Interlocking plate (Interlocking member), 21, 22 ... cam groove (cam mechanism portion), 23, 24 ... cam roller (cam mechanism portion), 26 ... remote control knob (switching operation portion), 30 ... magnetic shield body, 31 ... flywheel Section screen (electrical conductor surface), 32 ... Flywheel step surface (electrical conductor surface), L ... Radial distance, W ... Rotation center line direction distance, F1 ... Maximum resistance state, F3 ... Minimum resistance state.

Claims (6)

A support that supports a drive rotation shaft that can be rotated by human power, a magnet that is attached to the support around the rotation center line of the drive rotation shaft, a flywheel that rotates with the drive rotation shaft, and a magnet and fly A rotating electrical conductor that rotates with the drive rotating shaft between the wheel and passes through the lines of magnetic force generated between the magnet and the electrical conductor surface of the flywheel,
The resistance device for an exercise instrument, wherein the magnet includes a plurality of magnets whose relative positional relationship can be changed by a movable means.   The exercise apparatus according to claim 1, wherein a sum of distances in a rotation center line direction between the magnets and an electric conductor surface of the flywheel can be changed by changing a relative positional relationship of the magnets. Resistance device.   The said each magnet is supported by the movable means so that a movement adjustment is possible with respect to a support body so that the radial direction distance with respect to the rotation center line of a drive rotating shaft can be changed. The resistance device for exercise apparatus as described.   The movable means is one of a maximum resistance state having a relative positional relationship of each magnet having the smallest sum of the rotation center line direction distances and a minimum resistance state having a relative positional relationship of each magnet having the largest. The exercise apparatus resistance device according to claim 3, further comprising a switching operation unit capable of sequentially changing the resistance from one to the other.   The movable means rotates about a rotation center line of the drive rotation shaft by a plurality of levers that can rotate around an axis that is eccentric in the radial direction with respect to the rotation center line of the drive rotation shaft. And a cam mechanism portion provided between the interlock member and each lever, and the magnet is attached to each lever, and the switching operation portion causes the interlock member and the cam mechanism portion to intervene. The resistance device for an exercise device according to claim 4, wherein each lever can be rotated in conjunction with each other to change a radial distance of each magnet with respect to a rotation center line of the drive rotation shaft.   The resistance device for an exercise apparatus according to any one of claims 1 to 5, wherein a magnetic shield body is provided between the magnet and the electric conductor surface of the flywheel.

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