EP2471580B1 - Brake device for an exercise bicycle - Google Patents

Brake device for an exercise bicycle Download PDF

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Publication number
EP2471580B1
EP2471580B1 EP20100016129 EP10016129A EP2471580B1 EP 2471580 B1 EP2471580 B1 EP 2471580B1 EP 20100016129 EP20100016129 EP 20100016129 EP 10016129 A EP10016129 A EP 10016129A EP 2471580 B1 EP2471580 B1 EP 2471580B1
Authority
EP
European Patent Office
Prior art keywords
support
resilient element
driving shaft
resilient
brake device
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.)
Not-in-force
Application number
EP20100016129
Other languages
German (de)
French (fr)
Other versions
EP2471580A1 (en
Inventor
Mu-Chuan Wu
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.)
Tonic Fitness Tech Inc
Original Assignee
Tonic Fitness Tech Inc
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 Tonic Fitness Tech Inc filed Critical Tonic Fitness Tech Inc
Priority to EP20100016129 priority Critical patent/EP2471580B1/en
Publication of EP2471580A1 publication Critical patent/EP2471580A1/en
Application granted granted Critical
Publication of EP2471580B1 publication Critical patent/EP2471580B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A63B21/00058—Mechanical means for varying the resistance
    • A63B21/00069—Setting or adjusting the resistance level; Compensating for a preload prior to use, e.g. changing length of resistance or adjusting a valve
    • 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
    • A63B21/012—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters
    • A63B21/015—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters including rotating or oscillating elements rubbing against fixed elements
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
    • A63B22/0605—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing a circular movement, e.g. ergometers
    • 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
    • A63B21/02—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using resilient force-resisters
    • A63B21/023—Wound springs
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/0046—Details of the support elements or their connection to the exercising apparatus, e.g. adjustment of size or orientation

Definitions

  • the present invention relates to a brake device for an exercise bicycle, especially to a brake device having two resilient elements with different coefficients of elasticity.
  • an exercise bicycle comprises a frame 81, a wheel 83, a resistance device 82 and a conventional brake device 70.
  • the wheel 83 is mounted rotatably on the frame 81.
  • the resistance device 82 is mounted on the frame 81 and applies resistance to the wheel 83 to control an exercise load of a user when the user is riding the exercise bicycle.
  • the conventional brake device 70 is mounted on the frame 80 and has an outer tube 71, a button 73, a driving shaft 72 and a spring 74.
  • the outer tube 71 is mounted securely on the frame 81.
  • the driving shaft 72 is mounted slidably through the outer tube 71 and has two ends protruding out of the outer tube 71 and connected respectively to the resistance device 82 and the button 73.
  • the spring 74 is mounted in the outer tube 71 and has two ends respectively abutting the outer tube 71 and the driving shaft 72.
  • the spring 74 is pressed and the driving shaft 72 actuates the resistance device 82 to stop the wheel 83.
  • the spring 74 pulls the driving shaft 72 backwards.
  • the conventional brake device 70 only have one spring 74 to buffer a pushing force applied by the user and to push the driving shaft 72 back to release the resistance device 82.
  • the spring 74 needs to have a moderate coefficient of elasticity.
  • the coefficient of elasticity of the spring 74 is unadjustable to fit the user's need.
  • the main objective of the present invention is to provide a brake device for an exercise bicycle.
  • the brake device for an exercise bicycle has a main tube, a resilient assembly and a driving assembly mounted axially in the main tube, a end cap mounted on an open end of the main tube, and a button attached to the driving assembly.
  • the resilient assembly has a first resilient element and a second resilient element having a second coefficient of elasticity less than a first coefficient of elasticity of the first resilient element.
  • the driving assembly presses against the first resilient element and is able to obviously and quickly adjust a pressure of the resilient element.
  • the second resilient element quickly pushes the resilient assembly back and a resistance force applied to a wheel of the exercise bicycle is released.
  • a brake device 1 for an exercise bicycle 60 in accordance with the present invention is mounted on a frame 61 of the exercise bicycle 60 and comprises a main tube 10, a resilient assembly 20, an end cap 30, a driving assembly 40 and a button 50.
  • the main tube 10 is tubular and has a closed end 11, an open end 12 and a through hole 111.
  • the through hole 111 is formed through the closed end 11 of main tube 10.
  • the resilient assembly 20 is mounted axially in the main tube 10 and has a support 21, an extending shaft 22, a first resilient element 23 and a second resilient element 24.
  • the support 21 has a mounting recess 211, a sidewall and at least one guiding slit 212.
  • the mounting recess 211 is formed in an upper end of the support 21.
  • the sidewall is defined around the mounting recess 211.
  • the at least one guiding slit 212 is formed through the sidewall of the support 21 and extends axially.
  • the extending shaft 22 protrudes axially from a lower end of the support 21, is thinner than the support 21 and is mounted slidably through the through hole 111 of the main tube 10.
  • the first resilient element 23 may be a compression spring, is mounted in the mounting recess 211 of the support 21 and has a first coefficient of elasticity.
  • the second resilient element 24 may be a compression spring, is mounted around the extending shaft 22 and has two ends and a second coefficient of elasticity. The ends of the second resilient element 24 respectively abut the lower end of the support 21 and the closed end 11 of the main tube 10. The second coefficient of elasticity of the second resilient element 24 is less than the first coefficient of elasticity of the first resilient element 23.
  • the end cap 30 is mounted securely on the open end 12 of the main tube 10.
  • the driving assembly 40 is mounted axially through the end cap 30, presses against the first resilient element 23 and has a slider 41, a driving shaft 42 and a stopper 43.
  • the slider 41 is mounted slidably in the mounting recess 211 of the support 21, presses against the first resilient element 23 and has a lower end, an upper end and at least one sliding protrusion 411.
  • the lower end of the slider 41 presses against the first resilient element 23.
  • the at least one sliding protrusion 411 is formed on a side surface of the slider 41 and slidably protrudes in the at least one guiding slit 212 of the support 21.
  • the slider 41 slides axially in the mounting recess 211 of the support 21 and does not rotate relative to the support 21.
  • the driving shaft 42 has an inner section 421, an outer section 422, a limit protrusion 423 and an outer thread 424.
  • the inner section 421 of the driving shaft 42 is mounted through the slider 41.
  • the outer section 422 of the driving shaft 42 is mounted through and protrudes out of the end cap 50.
  • the limit protrusion 423 is formed on the driving shaft 42, is disposed between the inner and outer sections 421, 422 and in the main tube 10, and selectively abuts the end cap 30 so the driving shaft 42 does not slip out of the main tube 10 and the end cap 30.
  • the outer thread 424 is formed on and around the inner section 421 of the driving shaft 42.
  • the stopper 43 is mounted adjustably on the inner section 421 of the driving shaft 42, abuts the upper end of the slider 41, and may be a screw nut and adjustably and securely engages the outer thread 424 of the driving shaft 42.
  • the button 50 is attached to the outer section 422 of the driving shaft 42.
  • the brake device for the exercise bicycle as described has the following advantages. Turning the stopper 43 adjusts the positions of the stopper 43 and the slider 41. Consequently, a pressure of the first resilient element 23 is adjusted. Furthermore, since the first coefficient of elasticity of the first resilient element 23 is larger than the second coefficient of elasticity of the second resilient element 24, adjusting the position of the stopper 43 obviously and quickly adjusts the pressure of the first resilient element 23.
  • the extending shaft 22 of the resilient assembly 20 is connected to a resistance device 63 of the exercise bicycle 60 through transmission rods 62.
  • the resistance device 63 corresponds to and applies a resistance force to a wheel 64 of the exercise bicycle 60.
  • the resistance force applied to the wheel 64 is adjustable and may slow down rotation of the wheel 64 or stop the wheel 64 from rotating.
  • the extending shaft 22 actuates the resistance device 63 through the transmission rods 62 to slow down the rotation of the wheel 64 or to stop the wheel 64 from rotating. Furthermore, since the second resilient element 24 is pressed and has less coefficient of elasticity, as the user releases the button 50, the second resilient element 24 quickly pushes the support 21 and the extending shaft 22 back and the resistance force applied to the wheel 64 is released.
  • the resilient assembly 20 further has a pressure sensing patch 26 mounted in the mounting recess 211 of the support 21.
  • the first resilient element 23 is mounted on and presses against the pressure sensing patch 26.
  • the pressure sensing patch 26 senses the pressure of the first resilient element 23 and then shows the pressure of the first resilient element 23 on an instrument panel to allow the user to pay attention to the pressure of the first resilient element 23 to see if the pressure of the first resilient element 23 needs adjustment.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Flexible Shafts (AREA)
  • Braking Arrangements (AREA)

Description

    1. Field of the Invention
  • The present invention relates to a brake device for an exercise bicycle, especially to a brake device having two resilient elements with different coefficients of elasticity.
    • 2. Description of the Prior Art(s)
  • With reference to Fig. 7, an exercise bicycle comprises a frame 81, a wheel 83, a resistance device 82 and a conventional brake device 70. The wheel 83 is mounted rotatably on the frame 81. The resistance device 82 is mounted on the frame 81 and applies resistance to the wheel 83 to control an exercise load of a user when the user is riding the exercise bicycle. The conventional brake device 70 is mounted on the frame 80 and has an outer tube 71, a button 73, a driving shaft 72 and a spring 74. The outer tube 71 is mounted securely on the frame 81. The driving shaft 72 is mounted slidably through the outer tube 71 and has two ends protruding out of the outer tube 71 and connected respectively to the resistance device 82 and the button 73. The spring 74 is mounted in the outer tube 71 and has two ends respectively abutting the outer tube 71 and the driving shaft 72. When the button 73 and the driving shaft 72 are pushed, the spring 74 is pressed and the driving shaft 72 actuates the resistance device 82 to stop the wheel 83. When the button 73 and the driving shaft 72 are released, the spring 74 pulls the driving shaft 72 backwards.
  • However, the conventional brake device 70 only have one spring 74 to buffer a pushing force applied by the user and to push the driving shaft 72 back to release the resistance device 82. Considering to a buffering efficiency to the pushing force and a velocity when pushing the driving shaft 72 back, the spring 74 needs to have a moderate coefficient of elasticity. Furthermore, the coefficient of elasticity of the spring 74 is unadjustable to fit the user's need.
  • A similar exercise apparatus is described in document US-A-2010/0009815 .
  • The main objective of the present invention is to provide a brake device for an exercise bicycle. The brake device for an exercise bicycle has a main tube, a resilient assembly and a driving assembly mounted axially in the main tube, a end cap mounted on an open end of the main tube, and a button attached to the driving assembly. The resilient assembly has a first resilient element and a second resilient element having a second coefficient of elasticity less than a first coefficient of elasticity of the first resilient element.
  • The driving assembly presses against the first resilient element and is able to obviously and quickly adjust a pressure of the resilient element. The second resilient element quickly pushes the resilient assembly back and a resistance force applied to a wheel of the exercise bicycle is released.
    • IN THE DRAWINGS
    • Fig. 1 is a perspective view of a brake device for an exercise bicycle in accordance with the present invention;
    • Fig. 2 is an exploded perspective view of the brake device in Fig. 1;
    • Fig. 3 is a side view in partial section of the brake device in Fig. 1;
    • Fig. 4 is an operational side view in partial section of the brake device in Fig. 1, shown pressed;
    • Fig. 5 is a side view in partial section of another embodiment of a brake device for an exercise bicycle in accordance with the present invention;
    • Fig. 6 is an operational side view in partial section of the exercise bicycle with the brake device in Fig. 1, shown connected to a resistance device of the exercise bicycle through transmission rods; and
    • Fig. 7 is an enlarged side view in partial section of an exercise bicycle with a conventional brake device in accordance with the prior art.
  • With reference to Figs. 1 to 3 and 6, a brake device 1 for an exercise bicycle 60 in accordance with the present invention is mounted on a frame 61 of the exercise bicycle 60 and comprises a main tube 10, a resilient assembly 20, an end cap 30, a driving assembly 40 and a button 50.
  • The main tube 10 is tubular and has a closed end 11, an open end 12 and a through hole 111. The through hole 111 is formed through the closed end 11 of main tube 10.
  • The resilient assembly 20 is mounted axially in the main tube 10 and has a support 21, an extending shaft 22, a first resilient element 23 and a second resilient element 24. The support 21 has a mounting recess 211, a sidewall and at least one guiding slit 212. The mounting recess 211 is formed in an upper end of the support 21. The sidewall is defined around the mounting recess 211. The at least one guiding slit 212 is formed through the sidewall of the support 21 and extends axially. The extending shaft 22 protrudes axially from a lower end of the support 21, is thinner than the support 21 and is mounted slidably through the through hole 111 of the main tube 10. The first resilient element 23 may be a compression spring, is mounted in the mounting recess 211 of the support 21 and has a first coefficient of elasticity. The second resilient element 24 may be a compression spring, is mounted around the extending shaft 22 and has two ends and a second coefficient of elasticity. The ends of the second resilient element 24 respectively abut the lower end of the support 21 and the closed end 11 of the main tube 10. The second coefficient of elasticity of the second resilient element 24 is less than the first coefficient of elasticity of the first resilient element 23.
  • The end cap 30 is mounted securely on the open end 12 of the main tube 10.
  • The driving assembly 40 is mounted axially through the end cap 30, presses against the first resilient element 23 and has a slider 41, a driving shaft 42 and a stopper 43.
  • The slider 41 is mounted slidably in the mounting recess 211 of the support 21, presses against the first resilient element 23 and has a lower end, an upper end and at least one sliding protrusion 411. The lower end of the slider 41 presses against the first resilient element 23. The at least one sliding protrusion 411 is formed on a side surface of the slider 41 and slidably protrudes in the at least one guiding slit 212 of the support 21. Thus, the slider 41 slides axially in the mounting recess 211 of the support 21 and does not rotate relative to the support 21.
  • The driving shaft 42 has an inner section 421, an outer section 422, a limit protrusion 423 and an outer thread 424. The inner section 421 of the driving shaft 42 is mounted through the slider 41. The outer section 422 of the driving shaft 42 is mounted through and protrudes out of the end cap 50. The limit protrusion 423 is formed on the driving shaft 42, is disposed between the inner and outer sections 421, 422 and in the main tube 10, and selectively abuts the end cap 30 so the driving shaft 42 does not slip out of the main tube 10 and the end cap 30. The outer thread 424 is formed on and around the inner section 421 of the driving shaft 42.
  • The stopper 43 is mounted adjustably on the inner section 421 of the driving shaft 42, abuts the upper end of the slider 41, and may be a screw nut and adjustably and securely engages the outer thread 424 of the driving shaft 42.
  • The button 50 is attached to the outer section 422 of the driving shaft 42.
  • The brake device for the exercise bicycle as described has the following advantages. Turning the stopper 43 adjusts the positions of the stopper 43 and the slider 41. Consequently, a pressure of the first resilient element 23 is adjusted. Furthermore, since the first coefficient of elasticity of the first resilient element 23 is larger than the second coefficient of elasticity of the second resilient element 24, adjusting the position of the stopper 43 obviously and quickly adjusts the pressure of the first resilient element 23.
  • With further reference to Fig. 6, the extending shaft 22 of the resilient assembly 20 is connected to a resistance device 63 of the exercise bicycle 60 through transmission rods 62. The resistance device 63 corresponds to and applies a resistance force to a wheel 64 of the exercise bicycle 60. The resistance force applied to the wheel 64 is adjustable and may slow down rotation of the wheel 64 or stop the wheel 64 from rotating.
  • With further reference to Fig. 4, when a user pushes the button 50, the driving shaft 42, the slider 41, the support 21 and the extending shaft 22, the first and second resilient elements 23, 24 are pressed simultaneously.
  • Then, the extending shaft 22 actuates the resistance device 63 through the transmission rods 62 to slow down the rotation of the wheel 64 or to stop the wheel 64 from rotating. Furthermore, since the second resilient element 24 is pressed and has less coefficient of elasticity, as the user releases the button 50, the second resilient element 24 quickly pushes the support 21 and the extending shaft 22 back and the resistance force applied to the wheel 64 is released.
  • With further reference to Fig. 5, in another embodiment, the resilient assembly 20 further has a pressure sensing patch 26 mounted in the mounting recess 211 of the support 21. The first resilient element 23 is mounted on and presses against the pressure sensing patch 26. Thus, the pressure sensing patch 26 senses the pressure of the first resilient element 23 and then shows the pressure of the first resilient element 23 on an instrument panel to allow the user to pay attention to the pressure of the first resilient element 23 to see if the pressure of the first resilient element 23 needs adjustment.

Claims (5)

  1. A brake device (1) for an exercise bicycle comprising a main tube (10) having a closed end (11), an open end (12) and a through hole (111) formed through the closed end (11) of the main tube (10), a resilient assembly (20) mounted axially in the main tube (10), an end cap (30) mounted securely on the open end (12) of the main tube (10), a driving assembly (40) mounted axially through the end cap (30), pressing against the resilient assembly (20) and having a driving shaft (42) having an outer section (422) mounted through and protruding out of the end cap (30), and a button (50) attached to the outer section (422) of the driving shaft (42) of the driving assembly
    , wherein
    the resilient assembly (20) has
    a support (21) having a mounting recess (211) formed in an upper end of the support (21);
    an extending shaft (22) protruding axially from a lower end of the support (21), being thinner than the support (21) and mounted slidably through the through hole (111) of the main tube (10);
    a first resilient element (23) mounted in the mounting recess (211) of the support (21) and having a first coefficient of elasticity; and
    a second resilient element (24) mounted around the extending shaft (22) and having
    two ends respectively abutting the lower end of the support (21) and the closed end (11) of the main tube (10); and
    a second coefficient of elasticity of the second resilient element (24) being less than the first coefficient of elasticity of the first resilient element (23); and
    the driving assembly (40) presses against the first resilient element (23) and has
    a slider (41) mounted slidably in the mounting recess (211) of the support (21), pressing against the first resilient element (23) and having
    a lower end pressing against the first resilient element (23); and
    an upper end;
    the driving shaft (42) further having
    an inner section (421) mounted through the slider (41); and
    a limit protrusion (423) formed on the driving shaft (42), disposed between the inner and outer sections (421, 422) and in the main tube (10), and selectively abutting the end cap (30); and
    a stopper (43) mounted adjustably on the inner section (421) of the driving shaft (42) and abutting the upper end of the slider (41).
  2. The brake device (1) as claimed in claim 1, wherein
    the resilient assembly (20) further has a pressure sensing patch (26) mounted in the mounting recess (211) of the support (21); and
    the first resilient element (23) is mounted on and presses against the pressure sensing patch (26).
  3. The brake device (1) as claimed in claims 1 or 2, wherein
    the driving shaft (42) further has outer thread (424) formed on and around the inner section (421) of the driving shaft (42); and
    the stopper (43) is a screw nut and adjustably and securely engages the outer thread (424) of the driving shaft (42).
  4. The brake device (1) as claimed in claims 1, 2 or 3, wherein
    the support (21) further has
    a sidewall defined around the mounting recess (211); and
    at least one guiding slit (212) formed through the sidewall of the support (21) and extending axially; and
    the slider (41) further has at least one sliding protrusion (411) formed on a side surface of the slider (41) and slidably protruding in the at least one guiding slit (212) of the support (21).
  5. The brake device (1) as claimed in claim 4, wherein the first and second resilient elements (23, 24) are compression springs.
EP20100016129 2010-12-28 2010-12-28 Brake device for an exercise bicycle Not-in-force EP2471580B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20100016129 EP2471580B1 (en) 2010-12-28 2010-12-28 Brake device for an exercise bicycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100016129 EP2471580B1 (en) 2010-12-28 2010-12-28 Brake device for an exercise bicycle

Publications (2)

Publication Number Publication Date
EP2471580A1 EP2471580A1 (en) 2012-07-04
EP2471580B1 true EP2471580B1 (en) 2013-06-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100016129 Not-in-force EP2471580B1 (en) 2010-12-28 2010-12-28 Brake device for an exercise bicycle

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EP (1) EP2471580B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2682163B1 (en) * 2012-07-06 2016-11-02 Tonic Fitness Technology , Inc. Torque Sensing Apparatus
ES2398282B1 (en) * 2012-11-02 2014-01-21 Wingroup, S. Coop. Resistance control knob for indoor cycle bicycle
CN104001305A (en) * 2013-02-25 2014-08-27 江苏纵横体育用品有限公司 Fitness Taiji massage device
US10537764B2 (en) 2015-08-07 2020-01-21 Icon Health & Fitness, Inc. Emergency stop with magnetic brake for an exercise device
ES2802456T3 (en) * 2016-08-02 2021-01-19 Tonic Fitness Tech Inc Exercise bike fitted with a braking device
CN107661596A (en) * 2017-10-20 2018-02-06 宁波锦诠科技有限公司 A kind of brake structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2783044A (en) * 1953-07-28 1957-02-26 Sbarra Dominic Gregory Orthopedic exercising machines
US7004888B1 (en) * 2005-01-03 2006-02-28 Yen Shu Weng Exerciser having magnetic retarding device
TWI403344B (en) * 2008-07-08 2013-08-01 Johnson Health Tech Co Ltd Manual resistance control device for sports equipment

Also Published As

Publication number Publication date
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