U.S. patent application number 09/967953 was filed with the patent office on 2003-04-03 for adjustable magnetic resistance device for exercise bike.
Invention is credited to Chen, Tsung-Yu.
Application Number | 20030064863 09/967953 |
Document ID | / |
Family ID | 27219633 |
Filed Date | 2003-04-03 |
United States Patent
Application |
20030064863 |
Kind Code |
A1 |
Chen, Tsung-Yu |
April 3, 2003 |
Adjustable magnetic resistance device for exercise bike
Abstract
An adjustable magnetic resistance force of an exercise bike
includes two members pivotally connected to a frame of the bike and
a casing with magnets received therein is connected to the two
members. A plate is connected between a spring and a control cable
of the bike. The plate is pivotably connected to one of the two
members so that when pulling the control cable, the two members are
pivoted and the casing is shifted away from the fly wheel so as to
adjust the overlapped portion between the magnets and the fly
wheel.
Inventors: |
Chen, Tsung-Yu; (Chiayi
Hsien, TW) |
Correspondence
Address: |
ROSENBERG, KLEIN & LEE
3458 ELLICOTT CENTER DRIVE-SUITE 101
ELLICOTT CITY
MD
21043
US
|
Family ID: |
27219633 |
Appl. No.: |
09/967953 |
Filed: |
October 2, 2001 |
Current U.S.
Class: |
482/51 |
Current CPC
Class: |
A63B 2225/30 20130101;
A63B 21/152 20130101; A63B 21/0051 20130101; A63B 21/225 20130101;
A63B 22/0605 20130101 |
Class at
Publication: |
482/51 |
International
Class: |
A63B 022/00 |
Claims
What is claimed is:
1. An exercise bike comprising: a support base and a handlebar
post, a transverse frame connected to said handlebar post and two
slots respectively defined through one side of said frame, a crank
connected to one end of said frame and engaged with a wheel, a fly
wheel connected to the other end of said frame and a chain reeved
between said fly wheel and said wheel, a hole defined through a top
surface of said frame; a lug extending from said top surface of
said frame and a spring connected to said lug, a plate having an
end thereof connected to a distal end of said spring and the other
end of said plate connected to a cable which is connected to a
control member on said handlebar post, and a first member and a
second member respectively received in said frame and extending
from said hole in said frame, said first member connected to said
plate, a casing pivotably connected between said first member and
said second member by extending two bolts through said two slots
and said casing and engaged with two respective first ends of said
first member and said second member, two respectively second ends
of said first member and said second member pivotally connected to
a lower end of said frame, a plurality of magnets engaged with said
casing and facing a surface of said fly wheel.
2. The exercise bike as claimed in claim 1, wherein said casing is
a elongate member and said magnets are located along a longitudinal
axis of said casing.
3. The exercise bike as claimed in claim 1, wherein said first
member has two extensions extending therefrom and said plate
connected between said two extensions.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to an adjustable magnetic
resistance device for exercise bike wherein the magnets are
received in a casing which is clamped between two members which can
be pulled away from a fly wheel so as to adjust the magnetic
resistance force of the exercise bike.
BACKGROUND OF THE INVENTION
[0002] A conventional exercise bike has a wheel and a plurality of
magnets are received in the wheel. These magnets are connected with
each other by a belt which is connected to a control bar so that
when the user pulls the control bar, the position of the magnets
are moved relative to a fly wheel and the resistant force between
the magnets and the fly wheel is adjusted. However, the magnets
received in the wheel could be affected by metal objects when being
put close to the wheel. Besides, the magnets are connected to a
belt which is a flexible belt so that when pulling the bar to
adjust the position of the magnets, the flexible belt could bend to
a position that is not what it is supposed to be and the adjustment
of the resistance force becomes less precise. The magnets received
in the wheel also makes the replacement or maintenance for the
magnets to be difficult.
SUMMARY OF THE INVENTION
[0003] In accordance with one aspect of the present invention,
there is provided an adjustable magnetic resistance device of an
exercise bike and which comprises a lug extending from a top
surface of a frame of the bike and a spring is connected to the
lug. A plate has an end thereof connected to a distal end of the
spring and the other end of the plate is connected to a cable which
is connected to a control member on a handlebar post of the bike. A
first member and a second member are respectively received in the
frame and extend from a hole in the frame. The first member is
connected to the plate and a casing is pivotably connected between
the first member and the second member by extending two bolts
through two slots in a side of the frame and the casing and being
engaged with two respectively first ends of the first member and
the second member. Two respectively second ends of the first member
and the second member are pivotally connected to a lower end of the
frame. A plurality of magnets are engaged with the casing and face
a surface of the fly wheel of the bike.
[0004] The primary object of the present invention is to provide an
exercise bike that has a casing with magnets received therein and
the casing can be pivoted relative to the fly wheel by pulling a
cable so as to adjust the overlapped portion between the magnets
and the fly wheel.
[0005] The present invention will become more obvious from the
following description when taken in connection with the
accompanying drawings which show, for purposes of illustration
only, a preferred embodiment in accordance with the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 is a perspective view to show the exercise bike of
the present invention;
[0007] FIG. 2 is an exploded view to show the adjustable magnetic
resistance device of the exercise bike of the present
invention;
[0008] FIG. 3 is an exploded view to show the fly wheel and the
adjustable magnetic resistance device of the exercise bike of the
present invention;
[0009] FIG. 4 is a side view to show the exercise bike of the
present invention;
[0010] FIG. 5 is a side view to show when the adjustable magnetic
resistance device of the exercise bike of the present invention is
not pulled, and
[0011] FIG. 6 is a side view to show when the adjustable magnetic
resistance device of the exercise bike of the present invention is
pulled.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0012] Referring to FIGS. 1 to 5, the exercise bike of the present
invention comprises a T-shaped support base 22 and a handlebar post
21 extends from the support base 22 so that a handlebar is
connected to a top of the handlebar post 21. A transverse frame 30
is connected to the handlebar post 21 and a seat post extends from
the frame 30. Two slots 421, 422 are respectively defined through
one side of the frame 30 and a hole 41 is defined through a top
surface of the frame 30. A crank 34 with two pedals 341 is
connected to one end of the frame 30 and a wheel 342 is engaged
with the crank 34. A fly wheel 36 is connected to a shaft 35
connected to the other end of the frame 30 and a chain 37 is reeved
between the fly wheel 36 and the wheel 341 so that when rotating
the crank 34, the wheel 342 is rotated and the chain 37 drives the
fly wheel 36.
[0013] A lug 43 extends from the top surface of the frame 30 and a
spring 56 is connected to the lug 43. A plate 512 has an end
thereof connected to a distal end of the spring 56 and the other
end of the plate 512 is connected to a cable 55 which is connected
to a control member 211 on the handlebar post 21. A first member 51
and a second member 52 are respectively received in the frame 30
and extend from the hole 41 in the frame 30. The first member 51
has two extensions 510 extending therefrom and the plate 512 is
connected between the two extensions 510. An elongate casing 54 is
pivotably connected between the first member 51 and the second
member 52 by extending two bolts 53 through the two slots 421, 422
and the casing 54 and being engaged with two holes 511, 521 in
respective first ends of the first member 51 and the second member
52. Two respectively second ends of the first member 51 and the
second member 52 are pivotally connected to a lower end of the
frame 30 by bolts 530. A plurality of magnets 541 are engaged with
the casing 54 and located along a longitudinal axis of the casing
54. The magnets 541 face a surface of the fly wheel 36 as shown in
FIG. 5.
[0014] As shown in FIG. 6, when pulling the cable 55 by operating
the control member 211, the cable 55 pivots the first member 51 and
the second member 52 about the two respective bolts 530, the casing
54 also tilts so that some portion of the magnets 541 are shifted
away from the fly wheel 36. Therefore, this shifted portion of the
magnets 541 will not affect the fly wheel 36 so that the magnetic
resistance force to the fly wheel 36 is reduced.
[0015] The magnets 541 are collected in the casing 54 which can be
easily accessed by the maintainer so that the maintenance can be
conveniently proceeded. The mutual position relationship between
the magnets 541 and the fly wheel 36 can be adjusted according to
the practical needs so that the magnetic resistance force may also
be adjusted in various ways.
[0016] While we have shown and described the embodiment in
accordance with the present invention, it should be clear to those
skilled in the art that further embodiments may be made without
departing from the scope of the present invention.
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