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EP0603454A1 - Appareil à résistance pour exercice - Google Patents

Appareil à résistance pour exercice Download PDF

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Publication number
EP0603454A1
EP0603454A1 EP93102472A EP93102472A EP0603454A1 EP 0603454 A1 EP0603454 A1 EP 0603454A1 EP 93102472 A EP93102472 A EP 93102472A EP 93102472 A EP93102472 A EP 93102472A EP 0603454 A1 EP0603454 A1 EP 0603454A1
Authority
EP
European Patent Office
Prior art keywords
rotary disk
loading apparatus
eddy current
magnets
resistive load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93102472A
Other languages
German (de)
English (en)
Inventor
Koji Minoura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minoura Co Ltd
Original Assignee
Minoura Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minoura Co Ltd filed Critical Minoura Co Ltd
Publication of EP0603454A1 publication Critical patent/EP0603454A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/005—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using electromagnetic or electric force-resisters
    • A63B21/0051—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using electromagnetic or electric force-resisters using eddy currents induced in moved elements, e.g. by permanent magnets
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/16—Training appliances or apparatus for special sports for cycling, i.e. arrangements on or for real bicycles
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/16—Training appliances or apparatus for special sports for cycling, i.e. arrangements on or for real bicycles
    • A63B2069/164—Training appliances or apparatus for special sports for cycling, i.e. arrangements on or for real bicycles supports for the rear of the bicycle, e.g. for the rear forks
    • A63B2069/165—Training appliances or apparatus for special sports for cycling, i.e. arrangements on or for real bicycles supports for the rear of the bicycle, e.g. for the rear forks rear wheel hub supports
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B23/00—Exercising apparatus specially adapted for particular parts of the body
    • A63B23/035—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously
    • A63B23/04—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously for lower limbs
    • A63B23/0476—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously for lower limbs by rotating cycling movement

Definitions

  • the present invention relates to an exercise device for holding a bicycle rear wheel in order to produce a similar effect that of real bicycle racing. More particularly, the invention pertains to a apparatus for applying a controllable resistive load to the bicycle pedals.
  • Exercise device that are set on the floor for holding the rear wheel of the bicycle are available on the market. These devices generally permit the user to obtain a similar exercise effect to that obtained by actual racing bicycle.
  • a typical exercise device includes an apparatus for applying resistance to the rear wheel, proportionally to the rotating velocity of the rear wheel. The user's physical strength and health condition would enable the user to vary the resistance value.
  • a conventional loading apparatus has fans that generate variable air resistance on the pedals. This loading apparatus generates loud noise, and causes the fans to disturb and to spread the settled dust surrounding the exercise apparatus. Thus, the use of these conventional exercise device would generally be confined to areas that are regularly dusted and maintained. Additionally, these conventional exercise device could not be efficiently used in wide open places, such as on the beech, where air draughts would counter act, and exert undesirable force on the fans spread of dust since the air is disturbed with the fans.
  • Another proposed loading apparatus includes a brake for engaging a rotary disk fixed on a shaft.
  • the shaft is driven by the rear wheel of the bicycle. Therefore, the brake generates a frictional resistance that is proportional to the strenuousness of the user's exercise.
  • this device uses frictional resistance. Therefore, the resistance of the brake decreases as the engaging portions become worn out, and will eventually result in the inability to adjust the desired resistance accurately. Also frequent maintenance is required for the brake which would require repeated replacement.
  • the load resistive apparatus includes a rotary shaft 63 which support the bicycle.
  • a rotary metal disk 60 are fixed to one end of the rotary shaft, and a pair of disks 61 are disposed on the opposite sides of the rotary disk 60.
  • the rotary disk 60 includes a plurality of permanent magnets 62 that are concentrically arranged around the rotational axis of the disk 61. The rotation of the disk 60 and the magnetic flux of the opposite by disposed magnets 62, generate an eddy current.
  • the resistive load which is generated by the eddy current on the rotary disk, is transmitted to the rear wheel of the bicycle via the rotary shaft 63.
  • the permanent magnets 62 are circularly moved, thus changing the amount of the magnetic flux, which, in turn, adjusts the magnitude or value of the resistive load.
  • the noise level generated by this magnetic load resistive apparatus is low since the resistive load is generated magnetically. Additionally maintenance need is reduced and facilitated, as minimal wear takes place. Moreover, the resistive load can be adjusted easily.
  • the position of the permanent magnets, on one side of the rotary disk can be shifted to face the spaces formed between the permanent magnets on the other side of the rotary disk, because the intervals between the circularly shaped permanent magnets are equidistally spaced apart.
  • the two sets of permanent magnets that are disposed on either side of the rotary disk are not aligned with one another. Consequently, the magnetic flux does not change linearly, but rather changes non-linearly as a function of the adjustment or displacement of the control knob, as illustrated in Fig.9. Therefore, the magnetic flux and the load will change disproportional with the positional displacement of the control knob.
  • the loading apparatus offers generally linear relationship between the resistive load and the positional displacement of the control knob.
  • the loading apparatus includes a rotary disk that is rotated by a pair of pedals, in order to generate a desired resistive load.
  • a rotary shaft is connected to the rotary disk, and applied the resistive load to the bicycle wheel.
  • a pair of eddy current generating members generate a user controlled, variable eddy current on the rotary disk.
  • Each eddy current generating member includes one set of magnets, such that these magnets are generally oppositely disposed with respect to the rotary disk.
  • Each set of magnets includes a plurality of magnets of alternating polarities, there are concentrically circularly arranged around the rotary shaft.
  • the resistive load is changed substantially, linearly and proportionally with the displacement of the control or adjusting knob, since the permanent magnets are adjacently arranged to form a substantially continuous circular arrangement. This will allow the user to easily select, vary and control the resistive load.
  • a first and a second legs 1, 2 are obliquely set on right and left sides of a bicycle exercise stand respectively.
  • the bottom portion of each leg 1, 2 is connected to a first horizontal frame 3.
  • a sleeve 4 extends at the upper portion of the first leg 1, and accommodates a bolt 5.
  • a holder 6 is mounted on the inner end of the bolt 5.
  • the position of the holder 6 is adjustable with the knob 7.
  • a sleeve 8 extends at the upper portion of the second leg 2 to hold a slider 9.
  • the outer end of the slider 9 and the pedal 10 are operably connected to each other, by means of a lever 11. By operating the pedal 10, the lever 11 moves the slider 9 horizontally, inside the sleeve 8, in order to adjust the position of the holder 12 which is mounted on the inner end of the slider 9.
  • Top upper ends of a frame 13 are connected to the upper portions of the first and the second legs 1, 2.
  • the second horizontal frame 14 is connected to the bottom part of the frame 13.
  • the loading apparatus 15 is secured to the first horizontal frame 3. As shown in Fig.2, the rear wheel 51 of the bicycle 50 is rested on the loading apparatus 15. One hub of the rear wheel 51 of the bicycle 50 is clamped by the positional adjustment of the holders 6, 12.
  • the loading apparatus is explained hereinafter, with reference to Figs.3, 4.
  • the rotary shaft 16 is rotatably retained by the support frame 18, via a pair of bearings 17.
  • the driving cylinder 19 supports the rear wheel 51, and is fixed to the central portion of the rotary shaft 16.
  • the driving cylinder 19 rotates simultaneously with the rear wheel 51, as the foot pedals 52 of the bicycle 50 cause the rear wheel 51 to rotate.
  • a flange 20 is secured on a first end of the rotary shaft 16.
  • the flywheels 21 are mounted on the flange 20, by means of the screws 20a, to exert momentum on the foot pedals 52, through the shaft 16, during the operation of the foot pedals 52.
  • Each flywheel 21 is preferably made of steel.
  • Several flywheels 21 can be mounted on the cylinder 19 (three flywheels are used in the embodiment). The user can adjust the number of the flywheels 21 to better suit his/her physical strength and endurance level. A user of this exercise device can experience real bicycle riding by setting the appropriate number of the flywheels 21 on the rotary shaft 16.
  • a cup shaped inner case 22 is connected to the support frame 18, for covering the flywheels 21.
  • a cup shaped outer case 23 is fixed to the inner case 22, for accommodating the flywheels 21.
  • the flywheels 21 could be readily replaced when the outer case 23 is removed from the inner case 22.
  • a rotary metal disk 24 is secured to a second end of the rotary shaft 16, via the bush 25.
  • a cup shaped inner case 26 is secured to the side of the support frame 18, for covering the rotary disk 24. Further, a cup shaped outer case 27 is secured to the inner case 26, for accommodating the rotary disk 24.
  • Arcuately-shaped permanent magnets 28 are secured to a mounting disk 29, inside the inner case 26, in the vicinity of the rotary disk 24. As shown in Fig.4, the magnets 28 are juxtaposedly arranger to form a generally circle with alternating polarities, on the mounting disk 29. Heat radiating holes 24a are closely, substantially, concentrically and continuously arranged around the rotational axis of the rotary disk 24, at the inner portion thereof.
  • a supporting disk 30 is rotatably supported inside the outer case 27, and is carried with supporting legs 31, such that the disk 30 is prevented from becoming dislodged.
  • the permanent magnets 32 are arranged so as to form a substantially continuous circle with alternating polarities on the supporting disk 30, oppositely disposed relative to the permanent magnets 28.
  • the permanent magnets 32 generates an eddy current on the rotary disk 24 correlating with the magnets 28, as the rotary disk 24 rotates.
  • the eddy current causes resistance to be generated on the rotary disk 24. This resistance exerts a load on the foot pedals 52 of the bicycle 50.
  • an adjusting or control knob 33 is rotatably secured to the outer case 27, in order to adjust and regulate the load exerted on the foot pedals 52.
  • the adjusting knob 33 is rotatably secured to the outer case 27 by means of a pin 34, and is connected to the supporting disk 30 through connecting pieces 36. These connecting pieces 36 are formed on a connecting disk 35 on the back side of the adjusting knob 33.
  • an indicator 37 is formed integrally with the adjusting knob 33, and is easily rotated by user, points to a scale 38, which is located on the outer surface of the outer case 27 to provide a visual and easily identifiable indication of the difficulty level of the exercise, or in other terms, it provides an indication of the magnitude of the desired load to be exerted on the rotary disk 24 and the foot pedals 52.
  • the load is low when the indicator 37 points "L” on the scale 38.
  • the polarity of each magnet 28 is the same as that of the corresponding diametrically symmetrical magnet 32.
  • the load is high when the indicator 37 points to "H” on the scale 38. In this case, the polarity of each magnet 28 is opposite to that of the corresponding diametrically symmetrical magnet 32.
  • the load exerted on the foot pedals 52 is adjusted by turning the knob 33 between the "H” and "L” position.
  • an engaging ball 39 and a spring 40 are set on the outside surface of the outer case 27. The spring 40, and the ball 39 is inserted in the hole 41 formed with the connecting disk 35.
  • the ball 39 fixes the magnets 32 to the desired position corresponding to the position of the indicator 37.
  • the driving force generated from the rear wheel 51 is transmitted to the rotary shaft 16 via the driving cylinder 19.
  • the flywheels 21 and the rotary disk 24 rotate in a synchronous way according to the rotation of the rotary shaft 16, such that the eddy current is generated on the rotary disk 24, by means of the permanent magnets 28, 32 in order to exert the resistive load on the rotary disk 24.
  • the load is applied to the foot pedals 52.
  • the load on the foot pedals 52 could be regulated by shifting the relative position of the magnets 28, 32.
  • the magnetic flux passing through the rotary disk 24 is close to zero, since the polarity of each magnet 28 is the same as that of the opposite magnet 32, as shown in Fig.6(a).
  • the eddy current is generated to exert the load against the rotation of the rotary disk 24 when it rotates across the magnetic flux. Therefore, the eddy current for creating the load is not generated while the amount of the magnetic flux is zero.
  • the magnetic flux is sufficiently large, and exerts a high resistive load, since the polarities of the opposite magnets 28, 32 are different as shown in the Fig.6(c).
  • the position of the magnets 32 could be continuously varied between the "H” and the "L” position on the scale 38, in order to switch the polarity relationship against the magnets 28.
  • the magnetic flux increases linearly, so does the corresponding eddy current.
  • the load exerted on the pedals 51 changes linearly in relation to the angular displacement of the knob 33, as shown in Fig.7.
  • the desired load can be easily reached, since the resistive load changes linearly with respect to the angular displacement of the knob 33.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
EP93102472A 1992-12-25 1993-02-17 Appareil à résistance pour exercice Withdrawn EP0603454A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP34723992A JPH06190078A (ja) 1992-12-25 1992-12-25 室内運動具の抵抗付与装置
JP347239/92 1992-12-25

Publications (1)

Publication Number Publication Date
EP0603454A1 true EP0603454A1 (fr) 1994-06-29

Family

ID=18388864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102472A Withdrawn EP0603454A1 (fr) 1992-12-25 1993-02-17 Appareil à résistance pour exercice

Country Status (2)

Country Link
EP (1) EP0603454A1 (fr)
JP (1) JPH06190078A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997046284A1 (fr) * 1996-06-03 1997-12-11 Elite S.R.L. Dispositif a rouleau muni d'un frein, destine a une bicyclette d'entrainement
WO2004064940A1 (fr) * 2003-01-21 2004-08-05 Eui-Seung Shin Dispositif d'exercices
CN102008811A (zh) * 2010-08-23 2011-04-13 大连交通大学 场地自行车训练智能化监测系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1024137A (ja) * 1996-07-10 1998-01-27 Minoura:Kk 自転車用運動器具
ES2379450B1 (es) * 2010-10-01 2013-03-01 Bkool, S.L. Dispositivo de entrenamiento deportivo.
KR101441361B1 (ko) * 2013-01-10 2014-09-24 (주)디자인파크개발 마그네틱 부하 조절 장치
JP6411064B2 (ja) * 2014-05-08 2018-10-24 昭和電機株式会社 運動器具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4826150A (en) * 1986-02-20 1989-05-02 Minoura Carrier & Stand Works Co., Ltd. Resistance applying means for exercising apparatus
US4838544A (en) * 1987-06-23 1989-06-13 Matsushita Electric Industrial Co., Ltd. Exercise bicycle
US5051638A (en) * 1989-12-19 1991-09-24 Nathan Pyles Magnetically variable air resistance wheel for exercise devices

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0687901B2 (ja) * 1990-02-21 1994-11-09 修 長岡 回転抵抗発生装置およびこれを利用した自転車用トレーナ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4826150A (en) * 1986-02-20 1989-05-02 Minoura Carrier & Stand Works Co., Ltd. Resistance applying means for exercising apparatus
US4838544A (en) * 1987-06-23 1989-06-13 Matsushita Electric Industrial Co., Ltd. Exercise bicycle
US5051638A (en) * 1989-12-19 1991-09-24 Nathan Pyles Magnetically variable air resistance wheel for exercise devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997046284A1 (fr) * 1996-06-03 1997-12-11 Elite S.R.L. Dispositif a rouleau muni d'un frein, destine a une bicyclette d'entrainement
WO2004064940A1 (fr) * 2003-01-21 2004-08-05 Eui-Seung Shin Dispositif d'exercices
CN102008811A (zh) * 2010-08-23 2011-04-13 大连交通大学 场地自行车训练智能化监测系统

Also Published As

Publication number Publication date
JPH06190078A (ja) 1994-07-12

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