U.S. patent application number 11/040378 was filed with the patent office on 2006-07-27 for elliptical exercise machine with adjustable elliptical path.
Invention is credited to Te-Chang Huang, Hung-Mao Liao.
Application Number | 20060166791 11/040378 |
Document ID | / |
Family ID | 36697589 |
Filed Date | 2006-07-27 |
United States Patent
Application |
20060166791 |
Kind Code |
A1 |
Liao; Hung-Mao ; et
al. |
July 27, 2006 |
Elliptical exercise machine with adjustable elliptical path
Abstract
An exercise machine includes a pair of reciprocating slide
members each having a pivotal end connected to a rotating mechanism
and a sliding end slidable on a support. A foot plate 43 is mounted
slidably on a corresponding slide member. A linkage unit is
connected to each foot plate and the rotating mechanism, and a
control mechanism is associated with the linkage unit and the foot
plate for actuating the foot plate to move forward when the slide
member moves forward and to move rearward when the slide member
moves rearward. An elliptical path of the exercise machine can be
enlarged due to the slidable foot plate and the control
mechanism.
Inventors: |
Liao; Hung-Mao; (Taichung
City, TW) ; Huang; Te-Chang; (Chang-Hua Hsien,
TW) |
Correspondence
Address: |
TROP PRUNER & HU, PC
8554 KATY FREEWAY
SUITE 100
HOUSTON
TX
77024
US
|
Family ID: |
36697589 |
Appl. No.: |
11/040378 |
Filed: |
January 21, 2005 |
Current U.S.
Class: |
482/52 ;
482/57 |
Current CPC
Class: |
A63B 22/001 20130101;
A63B 22/203 20130101; A63B 22/0015 20130101; A63B 2022/067
20130101; A63B 22/0664 20130101; A63B 2022/0676 20130101 |
Class at
Publication: |
482/052 ;
482/057 |
International
Class: |
A63B 22/04 20060101
A63B022/04; A63B 22/06 20060101 A63B022/06 |
Claims
1. An exercise machine comprising: a support extending in a
front-to-rear direction and having a rotating mechanism mounted
thereon; a pair of slide members mounted on said support for
reciprocating movement and each having a pivotal end connected to
said rotating mechanism and a sliding end slidable on said support;
a foot plate mounted movably on one of said slide members; a
linkage unit connecting said foot plate to said rotating mechanism
for reciprocating said foot plate on said one of said slide
members; and a control mechanism associated with said linkage unit
for actuating said foot plate to move forward when said one of said
slide members moves forward and to move rearward when said one of
said slide members moves rearward.
2. The exercise machine as claimed in claim 1, wherein said linkage
unit includes at least first and second arms which are connected
pivotally to each other, said first arm being connected pivotally
to said pivotal end of said one of said slide members, said second
arm connected pivotally to said foot plate.
3. The exercise machine as claimed in claim 2, wherein said control
mechanism is connected to said pivotal end and said first arm for
turning said first arm and said pivotal end in opposite
directions.
4. The exercise machine as claimed in claim 3, wherein said control
mechanism includes a gear assembly.
5. The exercise machine as claimed in claim 4, wherein said gear
assembly includes a first gear mounted coaxially with said pivotal
end, and a second gear mounted coaxially with said first arm, said
first and second gears interlocking each other.
6. The exercise machine as claimed in claim 3, wherein said control
mechanism includes a pair of pulleys which are coaxial with said
pivotal end of said one of said slide members and said first arm,
respectively, and a cross belt extending over said pulleys.
7. The exercise machine as claimed in claim 3, wherein said control
mechanism includes a pair of rubber rollers which are in contact
with each other and which are respectively coaxial with said
pivotal end of said one of said slide members and said first
arm.
8. The exercise machine as claimed in claim 2, further comprising
an adjustment mechanism associated with said linkage unit for
adjusting the distance of the stroke of said foot plate on said one
of said slide members.
9. The exercise machine as claimed in claim 8, wherein said first
arm has a first end connected pivotally to said pivotal end of one
of said slide members, and a second end opposite to said first end,
said second arm having a first end connected to said first arm
through said adjustment mechanism.
10. The exercise machine as claimed in claim 9, wherein said
adjustment mechanism includes a plurality of retaining holes
provided in said first arm at intervals between said first and
second ends of said first arm and along the length of said first
arm, and a pivot unit for connecting said first end of said second
arm to a selected one of said retaining holes.
11. An exercise machine comprising: a support extending in a
front-to-rear direction and having a rotating mechanism mounted
thereon; a pair of slide members mounted on said support for
reciprocal movement and each having a pivotal end connected
pivotally to said rotating mechanism; a foot plate mounted movably
on one of said slide members; a linkage unit connecting to said
foot plate to said rotating mechanism for reciprocating said foot
plate on said one of said slide members; and a control mechanism
associated with said linkage unit for actuating said foot plate to
move forward when said one of said slide members moves forward and
to move rearward when said one of said slide members moves
rearward.
12. The exercise machine as claimed in claim 11, wherein said
linkage unit includes at least first and second arms which are
connected pivotally to each other, said first arm being connected
pivotally to said pivotal end of said one of said slide members,
said second arm connected pivotally to said foot plate.
13. The exercise machine as claimed in claim 12, wherein said
control mechanism is connected to said pivotal end and said first
arm for turning said first arm and said pivotal end in opposite
directions.
14. The exercise machine as claimed in claim 13, wherein said
pivotal end is turnable about a first axis, and said first arm is
turnable about a second axis adjacent said first axis, said control
mechanism being connected to said first and second axes.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] This invention relates to an exercise machine, more
particularly to an elliptical exercise machine which permits the
user to exercise by moving his/her feet along an elliptical
path.
[0003] 2. Description of the Related Art
[0004] Referring to FIG. 1, a typical elliptical exercise machine
includes a frame 11 which carries a pair of swinging arms 16, a
pair of foot members 14 connected to a rotating mechanism 12
through cranks 13, and a pair of reciprocating members 17 each of
which is connected to one of the swinging arms 16. The foot members
14 are provided respectively with foot platforms 15. The bottom
ends of the foot members 14 are slidable along rails provided on
the frame 11. When the user stands on the foot platforms 15 and
exercises by moving the foot platforms 15 with his feet, the foot
members 14 move forward and rearward, and the cranks 13 rotate
about the axis of the rotating mechanism 12 so that each foot
platform 15 ascends and descends along an elliptical path.
[0005] In such an exercise machine, the length of the elliptical
path along a front-to-rear direction or the stroke of the foot
platforms 15 is limited by the length of the cranks 13 and thus is
not changeable or adjustable. Thus, the length of the stroke may be
insufficient for a user who is tall and requires a longer stroke,
and may be unduly long for a user who is short and needs a smaller
stroke to avoid overstressing his feet. If the length of the stroke
is to be increased, the length of the cranks 13 must be increased
to enlarge the circular path along which the cranks move, thereby
increasing the volume of the exercise machine. In addition, the
lengthening of the cranks 13 increases not only the length of the
elliptical path along the front-to-rear direction but also the
height of the elliptical path along a top-to-bottom direction. The
increase in height of the elliptical path can result in
overstressing of the knees of the user as the user must lift his
knees too much when making an ascending movement.
[0006] Furthermore, since the foot platforms 15 are mounted fixedly
on the respective foot members 14, they are not changeable in
angular position relative to the foot members 14. As the user's
feet will incline upward and downward alternately during their
ascend and descend movements, the foot platforms 15 which are fixed
to the foot members 14 are ergonomically unfavorable to the user's
feet.
SUMMARY OF THE INVENTION
[0007] An object of the present invention is to provide an
elliptical exercise machine which permits foot plates to move along
an elliptical path having a prolonged length along a front-to-rear
direction without increasing the height of the elliptical path
along a top-to-bottom direction.
[0008] Another object of the present invention is to provide an
elliptical exercise machine with foot plates which are movable on
respective reciprocating slide members so that the length of an
elliptical path along which the foot plates move is adjustable.
[0009] Accordingly, the present invention provides an exercise
machine which comprises: a support extending in a front-to-rear
direction and having a rotating mechanism mounted thereon; a pair
of slide members mounted on the support for reciprocating movement
and each having a pivotal end connected to the rotating mechanism
and a sliding end slidable on the support; a foot plate mounted
movably on one of the slide members; a linkage unit connecting the
foot plate to the rotating mechanism for reciprocating the foot
plate on the one of the slide members; and a control mechanism
associated with the linkage unit for actuating the foot plate to
move forward when the one of the slide members moves forward and to
move rearward when the one of the slide members moves rearward.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Other features and advantages of the present invention will
become apparent in the following detailed description of the
preferred embodiments of the invention, with reference to the
accompanying drawings, in which:
[0011] FIG. 1 is a schematic view of a conventional elliptical
exercise machine;
[0012] FIG. 2 is a perspective view of a first preferred embodiment
of the present invention;
[0013] FIG. 3 is a plan view of the first preferred embodiment;
[0014] FIG. 4 is a fragmentary view of the first preferred
embodiment;
[0015] FIG. 5 is a fragmentary sectional view of the first
preferred embodiment;
[0016] FIG. 6 is a side elevation view of the first preferred
embodiment;
[0017] FIG. 7 is the same view as FIG. 6 but with a second arm
connected to one of retaining holes farther from a first end of a
first arm;
[0018] FIG. 8 is the same view as FIG. 6 but with a pivotal end of
one of slide members moving to a different position;
[0019] FIG. 9 is the same view as FIG. 8 but with a second arm
connected to one of retaining holes farther from a first end of a
first arm;
[0020] FIG. 10 is a fragmentary view showing an alternative control
mechanism of the first preferred embodiment;
[0021] FIG. 11 is a fragmentary view showing another alternative
control mechanism of the first preferred embodiment;
[0022] FIG. 12 is a perspective view of the second preferred
embodiment; and
[0023] FIG. 13 is a side elevation view of the second preferred
embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0024] Before the present invention is described in greater detail,
it should be noted that same reference numerals have been used to
denote like elements throughout the specification.
[0025] Referring to FIGS. 2 and 3, a first embodiment of an
exercise machine according to the present invention is shown at (A)
which specifically designates an elliptical exercise machine. The
elliptical exercise machine (A) comprises a support body 2 which
includes a base 21, an upstanding frame 22 extending upward from a
front end of the base 21, a pair of slide rails 23 provided in the
base 21, and a rotating mechanism 20 mounted on the base 21 in
front of the slide rails 23. The rotating mechanism 20 may be any
rotating mechanism which is used conventionally in elliptical
exercise machines. In this embodiment, the rotating mechanism 20
includes a flywheel 201 and a pair of rotary members 24 which are
mounted coaxially on the base 21. While the rotary members 24 as
shown are circular discs, the configuration of the rotary members
24 should not be limited thereto according to the present
invention.
[0026] A pair of slide members 31 are mounted on the base 21 on two
sides of the rotating mechanism 20. Each slide member 31 has a
pivotal end 311 connected pivotally to one of the rotary members 24
and a sliding end 312 mounted slidably on the corresponding slide
rail 23. A U-shaped seat 32 is attached to a top face 313 of each
slide member 31.
[0027] A pair of foot support members 4 are pivoted respectively to
the slide members 31 at front ends 411 thereof. Specifically, each
foot support member 4 has a foot support seat 41 which has a front
end 411 connected pivotally to the corresponding slime member 31.
The front end 411 extends into the U-shaped seat 32 of the
corresponding slide member 31. A pivot member 42 is inserted into
the U-shaped seat 32 and the front end 411 to interconnect each
foot support seat 41 to the corresponding slide member 31. A guide
rail 414 is provided on each foot support seat 41 to extend in a
direction from the front end 411 to the rear end 412 of each foot
support seat 41 and to receive a plurality of rollers 431 as shown
in FIG. 4. Each foot support member 4 further includes a foot plate
43 which is mounted movably on each foot support seat 41 and is
connected to the rollers 431.
[0028] According to the present invention, the foot plates 43 are
connected to the respective rotary members 24 through linkage units
for reciprocating the foot plates 43 when the slide members 31 move
forward and backward. Each linkage unit may be made up of two or
more interconnected arms. Referring to FIGS. 6 and 7 in combination
with FIGS. 2 and 3, each linkage unit in this embodiment includes
first and second arms 51 and 53 which are pivoted to each other.
The first arm 51 has opposite first and second ends 511 and 512.
The first end 511 is connected to the corresponding rotary member
24 by being pivoted to the pivotal end 311 of the corresponding
slide member 31. The second arm 53 has a first end 531 connected
pivotally to the first arm 51 and a second end 532 connected
pivotally to the corresponding foot plate 43. The position of the
first end 531 of the second arm 53 relative to the first end 511 of
the first arm 51 may be adjusted to increase or decrease the length
of the stroke of each foot plate 43.
[0029] Referring to FIG. 5 in combination with FIG. 2, an
adjustment mechanism for adjusting the length of the stroke of each
foot plate 43 includes a plurality of retaining holes 513 formed in
the first arm 51 at intervals along the length of the first arm 51
between the first and second ends 511 and 512, and an adjustment
piece 521 which is mounted slidably on the first arm 51.
Particularly, the adjustment piece 521 straddles on the first arm
51 and includes two legs 5211 engaged slidably with the first arm
51. An internally threaded hollow member 522 is integral with the
adjustment piece 521 and projects from the adjustment piece 521
opposite to the legs 5211. The threaded hollow member 522 is
inserted into a pivot hole 533 in the first end 531 of the second
arm 53. A pivot member 52 is threadedly inserted into the threaded
hollow member 522 and has an end tip 524 extending into a selected
one of the retaining holes 513, thereby holding fixedly the
adjustment piece 521 relative to the selected retaining hole 513 in
the first arm 51 and connecting pivotally the first end 531 of the
second arm 53 to a selected one of the retaining holes 513 in the
first arm 51. If the position of the first end 531 of the second
arm 53 is to be changed, the pivot member 52 may be turned outward
so that the end tip 524 of the pivot member 52 disengages from the
first arm 51. An enlarged head 523 of the pivot member 52 extends
outwardly of the threaded hollow member 522 to facilitate turning
of the pivot member 52 by the user. By turning the enlarged head
523, the end tip 524 of the pivot member 52 can engage and
disengage from the selected retaining hole 513.
[0030] Referring once again to FIGS. 2 and 3, the first end 511 of
each first arm 51 is pivoted to the pivotal end 311 of the
corresponding slide member 31 about an axis (p) which is parallel
and adjacent to an axis (q) about which the pivotal end 311 of the
corresponding slide member 31 is pivoted to the rotary member 24.
The axis (p) is located on one side of the axis (q) opposite to the
sliding end 312 of the slide member 31. A control mechanism
includes a first gear 54 which is mounted on one of the rotary
members 24 in a coaxial relationship with the pivotal end 311 of
the corresponding slide member 31. The first gear 54 interlocks
with a second gear 55 which is mounted rotatably on the pivotal end
311 of the slide member 31 in a coaxial relationship with the first
end 511 of the first arm 51. The first gear 54 is fixed to the
pivotal end 311 of the corresponding slide member 31, and is
turnable together with the pivotal end 311. When the rotary member
24 rotates, the first gear 54 will drive the second gear 55 to
rotate in a direction opposite to that of the first gear 54. On the
other hand, the number of teeth of the first gear 54 is equal to
that of the second gear 55. When the first gear 54 makes one
revolution, the second gear 55 together with the first arm 51 turns
by an angle of 360 degrees in an opposite direction.
[0031] The exercise machine (A) further includes a pair of swinging
arms 61 mounted pivotally on the upstanding frame 22, a pair of
handles 611 respectively connected to the swinging arms 61, and a
pair of reciprocating rods 62. Each reciprocating rod 62 has a
front end connected pivotally to a lower end of the corresponding
swinging arm 61 and a rear part connected fixedly to the
corresponding foot support seat 41 through first and second pins
63. The movement of the foot support seat 41 is therefore related
to the movement of the corresponding reciprocating rod 62 in
addition to the movement of the corresponding slide member 31.
[0032] Referring again to FIGS. 6 and 7, the pivotal end 311 of one
of the slide members 31 rotates to a position corresponding to a
nine o'clock position. In FIGS. 8 and 9, the pivotal end 311 of the
slide member 31 rotates to a position corresponding to a three
o'clock position.
[0033] When the user stands on the foot plates 43 and exercises by
moving his/her legs, the pivotal ends 311 of the slide members 31
rotates about an axis (L) along with the rotary members 24, and the
sliding ends 312 of the slide members 31 slide on the base 21. When
the pivotal end 311 of one of the slide members 31 moves upward and
forward from the position shown in FIGS. 6 and 7, the first gear 54
connected thereto turns clockwise and the corresponding second gear
55 rotates counterclockwise. As the second gear 55 rotates in a
direction opposite to the direction of the first gear 54, the first
arm 51 is turnable in a direction opposite to the rotating
direction of the pivotal end 311 of the slide member 31.
[0034] Due to the movements of the slide members 31 and the
reciprocating rods 62, the foot support seats 41 can move along an
elliptical path. In addition, because of the opposite direction
rotation of the first arms 51 relative to the pivotal ends 311 of
the slide members 31, each foot plate 43 moves forward when the
corresponding slide member 31 moves forward and rearward when the
corresponding slide member 31 moves rearward. When each slide
member 31 reaches its rearmost position, the corresponding foot
plate 43 arrives at its rearmost position. When each slide member
31 reaches its frontmost position, the corresponding foot plate 43
arrives at its frontmost position. As such, the length of the
stroke of each foot plate 43 is prolonged or the length of the
elliptical path along a front-to-rear direction of the exercise
machine (A) is increased without increasing the height of the
elliptical path in a bottom-to-top direction.
[0035] Note that, when one of the slide members 31 moves forward,
the corresponding first arm 51 extends in a direction substantially
the same as that of the slide member 31 and is moved forwardly of
the slide member 31 as shown in FIG. 9. In this state, the second
end 532 of the second arm 53 will pull the corresponding foot plate
43 to the frontmost position. When the slide member 31 moves
rearward, the first arm 51 extends in a direction substantially the
same as that of the slide member 31 and is moved rearward as shown
in FIG. 7. In this state, the second end 532 of the second arm 53
pushes the corresponding foot plate 43 to its rearmost position
relative to the corresponding foot support seat 41.
[0036] The rearmost and frontmost positions of the foot plates 43
may be varied by moving the adjustment pieces 521 along the
respective first arms 51. Referring once again to FIGS. 2, 6 and 8,
the first end 531 of the second arm 53 is connected to the first
arm 51 through one of the retaining holes 513 proximate to the
first end 511 of the first arm 51. In FIGS. 7 and 9, the first end
531 of the second arm 53 is connected to one of the retaining holes
513 farthest from the first end 511 of the first arm 51. The
rearmost position of the foot plate 43 shown in FIG. 6 is changed
by a distance "D" in FIG. 7. The frontmost position of the foot
plate 43 shown in FIG. 8 is changed by a distance "D" in FIG. 9.
This means that the length of the elliptical path in the
front-to-rear direction is increased in FIGS. 7 and 9. The length
of the elliptical path is therefore variable through an adjustment
using the adjustment piece 521 and the retaining holes 513.
[0037] According to the present invention, the first and second
gears 54 and 55 used in the first embodiment may be replaced by a
belt-and-pulley assembly as shown in FIG. 10, or a friction roller
assembly as shown in FIG. 11. The belt-and-pulley assembly includes
a cross belt 58 and a pair of first and second pulleys 56 and 57
which are coaxial with the pivotal end 311 of the slide member 31
and the first arm 51, respectively. The friction roller assembly
includes a pair of rubber rollers 59 which are in contact with each
other and which are respectively coaxial with the pivotal end 311
and the first arm 51. Both of the belt-and-pulley assembly and the
friction roller assembly are able to turn the first arm 51 in a
direction opposite to that of the slide member 31, like the first
and second gears 54 and 55.
[0038] Referring to FIGS. 12 and 13, a second embodiment of the
exercise machine according to the present invention is shown to
include a support 2', two slide members 31', and two foot support
members 4'. A rotary member 24' is mounted on a rear part of a base
21' of the support 2' and is connected to the slide members 31'
having lower ends 312' sliding on the base 21'.
[0039] Foot support seats 41' of the foot support members 4' are
mounted fixedly on the respective slide members 31' to support foot
plates 43', respectively. Each foot plate 43' is slidable forward
and rearward along rails 411' provided on the corresponding foot
support seat 41'. A pair of reciprocating members 64' are connected
respectively to the slide members 31' and to two swinging arms 61'
that are in turn mounted on an upstanding frame 22' of the support
2'.
[0040] Each foot plate 43' is connected pivotally to a second arm
53 which in turn is pivoted to a first arm 51. The first arm 51 is
connected pivotally to a pivotal end 311' of the corresponding
slide member 31'. First and second gears 54 and 55 are connected
respectively to the first arm 51 and the pivotal end 311' of the
slide member 31'. Since the operation of the exercise machine of
this embodiment is similar to that of the previous embodiment, it
will not be described herein.
[0041] Due to the provision of the foot plates 43, 43' which are
slidable relative to the slide members 31, 31', the length of the
stroke of the foot plates 43, 43' or the length of the elliptical
path along the front-to-rear direction can be adjusted or enlarged
according to the need of the user.
[0042] Therefore, the exercise machine provides a wide range of
stroke lengths and can accommodate ergonomically different users
having varying heights and body structures. In addition, although
the length of the elliptical path along the front-to-rear direction
is prolonged, the height of the elliptical path along the
top-to-bottom direction is not increased, thus eliminating the
problem of overstressing or hurting the user's feet.
[0043] While the present invention has been described in connection
with what is considered the most practical and preferred
embodiments, it is understood that this invention is not limited to
the disclosed embodiments but is intended to cover various
arrangements included within the spirit and scope of the broadest
interpretations and equivalent arrangements.
* * * * *