U.S. patent application number 16/543631 was filed with the patent office on 2020-01-16 for upper leg and hip exercise method and device to preserve knee and ankle joint while exercising..
The applicant listed for this patent is Eun Bee Kim. Invention is credited to Eun Bee Kim.
Application Number | 20200016450 16/543631 |
Document ID | / |
Family ID | 62628920 |
Filed Date | 2020-01-16 |
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United States Patent
Application |
20200016450 |
Kind Code |
A1 |
Kim; Eun Bee |
January 16, 2020 |
Upper leg and hip exercise method and device to preserve knee and
ankle joint while exercising.
Abstract
Provided is an exercise device for performing exercises suitable
to strengthen thigh and hip muscles such as a leg press machine, a
total hip, and more particularly provides an exercise device for
strengthening thigh and hip muscles while protecting the knees and
ankle joints by enabling a user to locate a lower end of an arm on
the user's thigh in a sitting or lying position and move the user's
legs in order to minimize a load or stress added to the knee and
ankle joints.
Inventors: |
Kim; Eun Bee; (Chuncheon-si,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Kim; Eun Bee |
Chuncheon-si |
|
KR |
|
|
Family ID: |
62628920 |
Appl. No.: |
16/543631 |
Filed: |
August 19, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
15372350 |
Dec 7, 2016 |
|
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16543631 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A63B 21/0552 20130101;
B62M 9/02 20130101; A63B 21/0628 20151001; B62J 1/28 20130101; B62M
1/24 20130101; A63B 21/4034 20151001; A63B 21/4035 20151001; A63B
22/0023 20130101; A63B 22/0046 20130101; A63B 23/0476 20130101;
A63B 21/22 20130101; A63B 22/0605 20130101; B62M 3/00 20130101;
B62M 1/36 20130101; A63B 21/4039 20151001 |
International
Class: |
A63B 22/00 20060101
A63B022/00; B62M 1/24 20060101 B62M001/24; B62M 1/36 20060101
B62M001/36; A63B 21/22 20060101 A63B021/22; A63B 23/04 20060101
A63B023/04; A63B 22/06 20060101 A63B022/06; A63B 21/00 20060101
A63B021/00; A63B 21/062 20060101 A63B021/062; A63B 21/055 20060101
A63B021/055 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 5, 2016 |
KR |
1020160164260 |
Sep 7, 2018 |
KR |
1020180107382 |
Feb 15, 2019 |
KR |
1020190017985 |
Mar 5, 2019 |
KR |
1020190025484 |
Claims
1. A device for exercising upper leg portions and hips while
protecting knee and ankle joints, the exercise device comprising: a
frame; a seat connected to the frame and configured to support a
user in a sitting or lying position; an arm pivotably connected to
the frame and rotatable; a thigh pad pivotably connected to a lower
end of the arm and configured to contact the user's thigh during
use; a resistive force generator configured to generate a resistive
force against pivoting of the arm portion that rotates when the
thigh pad moves; wherein the force generator is weight stack;
wherein the exercise device is configured to allow the user to sit
or lie on the seat to have the sitting or lying position, place the
user's thigh on the thigh pad, and move the thigh of the user
backward from an exercise starting position where the thigh is
pulled toward the user's chest such that the user's thigh moves
during exercises and the user flexes the hip while exercising.
2. The exercise device of claim 1, further comprising an upper
support located in front of or behind the seat; and a handle
connected to a lower end of the seat or the frame.
3. The exercise device of claim 1, further comprising an arm angle
adjustment assembly configured to set an open angle of the user's
leg.
4. The exercise device of claim 1, wherein the arm comprises a
pivot axis on a rear end of the seat.
5. The exercise device of claim 1, wherein the arm comprises an arm
pivot axis aligned with a user's hip joint.
6. The exercise device of claim 1, wherein the arm is attached to a
lower end of the seat within a radius of 20 cm from the user's
pelvis when viewed in a sagittal plane.
7. The exercise device of claim 1, wherein the arm comprises an
axis transformation mechanism.
8. The exercise device of claim 1, further comprising a foot plate
connected to a lower end of the frame, the seat, or the arm
portion; a foot plate connector having a first end portion
connected to the foot plate and a second end portion pivotably
connected to the arm.
9. The exercise device of claim 1, further comprising a foot plate
connected to a lower end of the frame.
10. A device for exercising upper leg portions and hips while
protecting knee and ankle joints, the exercise device comprising: a
frame; a seat connected to the frame and configured to support a
user in a sitting or lying position; an arm pivotably connected to
the frame and rotatable; a thigh pad pivotably connected to a lower
end of the arm and configured to contact the user's thigh during
use; a resistive force generator configured to generate a resistive
force against pivoting of the arm portion that rotates when the
thigh pad moves; wherein the exercise device is configured to allow
the user to sit or lie on the seat to have the sitting or lying
position, place the user's thigh on the thigh pad, and move the
thigh of the user backward from an exercise starting position where
the thigh is pulled toward the user's chest such that the user's
thigh moves during exercises and the user flexes the hip while
exercising.
Description
[0001] This application is Divisional application of, claims
priority to, and incorporates by reference, U.S. patent application
Ser. No. 15/372,350, which entered the US National stage on Dec. 7,
2016, from KR Patent Application No. 10-2016-0164260, filed on Dec.
5, 2016, which is patented on Feb. 20, 2019, in the KR Intellectual
Property Office. This application claims the benefit of priority
and incorporates by reference, KR Application No. 10-2018-0107382,
filed on Sep. 7, 2018; KR Application No. 10-2019-0025484, filed on
Mar. 4, 2019; KR Application No. 10-2019-0017985, filed on Feb. 15,
2019, which are patented in KR Intellectual Property Office, and
divisions of KR application No. 10-2016-0164260, filed on Dec. 5,
2016, in the KR Intellectual Property Office, which entered the
U.S. on Dec. 7, 2016. The present application has the same inventor
as the aforementioned application.
FIELD OF THE INVENTION
[0002] The present disclosure relates to an exercise method and an
exercise device for performing exercises suitable to strengthen
thigh and hip muscles while protecting the knees and ankle joints
such as a leg press machine, a total hip, a stationary bicycle, or
a moving bicycle, and more particularly, to an exercise method and
an exercise device for strengthening thigh and hip muscles while
protecting knee and angle joints by enabling a user to locate a
lower end of an arm on his/her thighs in a sitting or lying
position and move his/her legs.
[0003] To this end, the exercise device according to the present
disclosure includes a seat configured to support the user in the
sitting or lying position and the arm rotatably attached within a
radius of 20 cm from the user's pelvis in a sagittal plane, wherein
the end of the arm is configured to contact the user's thighs
during use.
[0004] The exercise device according to an embodiment of the
present disclosure includes various resistive force generators each
configured to generate a resistive force against a force exerted by
the user to rotate an arm portion. Also, the exercise device
according to the present disclosure includes a shaft changing
portion configured to allow the user to change a direction of an
arm pivot axis. The exercise device according to another embodiment
of the present disclosure includes two different pivot axis
provided on one arm portion.
[0005] The exercise device according to another embodiment of the
present disclosure includes two different arm shafts provided on
one arm portion. In addition, the exercise device is applied to a
bicycle so that the arm shaft of the arm portion is located on hip
joints and an end of the arm is placed on the back of the thighs,
and the exercise device propels the bicycle by rotating when the
arm portion rotates clockwise and idling when the arm portion
rotates counterclockwise to drive a rear wheel.
DESCRIPTION OF RELATED ART
[0006] Thigh and hip muscles account for more than a third of all
muscles in our body. Building thigh and hip muscles may reduce the
risk of diabetes, etc., may prevent obesity, and may promote health
after middle age, and may also help to improve the physical fitness
and sport ability of athletes.
[0007] However, exercises for strengthening thigh and hip muscles
apply a load to ankle and knee joints, and thus knee osteoarthritis
and chondromalacia are common among people who do strength
training. Also, it is difficult for people with weak knees and
ankle joints such as elders or obese people to perform exercises
for strengthening thigh and hip muscles. Accordingly, there is a
demand for an exercise device for training thigh and hip muscles
without adding stress to the knees and joints. In general, a user
performs an exercise for strengthening thigh and hip muscles by
pulling his/her legs toward the chest and pushing them outward with
the pelvis as an axis, as shown in FIG. 1. However, existing
exercise methods and exercise devices may damage the knees and
ankle joints because a load is directly transmitted to the ankles
and knees, and thus it is not suitable for people with weak knees
and ankle joints to use the existing exercise methods and exercise
devices. Accordingly, the present disclosure is configured to
reduce a force transmitted to the knees and ankles by enabling a
user to locate a foot plate or a foot pad of an exercise machine
connected to a weight on his/her thigh and pull his/her legs toward
the chest and push them backward in a sitting, lying, or prone
position.
[0008] When the exercise device according to an embodiment of the
present disclosure is used, the user's thigh and hip muscles are
all involved in lateral rotation and adduction as well as extension
of the hip joints. Accordingly, the exercise machine according to
an embodiment of the present disclosure includes a shaft changing
portion configured to allow the user to change a direction of an
arm shaft. The arm shaft may be rotatable in a direction in which
the user's legs are extended. Also, the arm shaft may be movable in
a direction in which the user's legs are adducted and laterally
rotated. The exercise device according to another embodiment of the
present disclosure includes two different arm shafts on one arm so
that rotations about different axes are simultaneously performed
and lateral rotation and adduction are simultaneously
performed.
[0009] In addition, the exercise device according to another
embodiment of the present invention includes a bicycle frame. In an
existing bicycle, since a hip joint motion range is limited to a
rotation diameter of a crank arm to which a pedal is attached, as
shown in FIG. 2, the user's lower body is repeatedly moved only in
a small space. Accordingly, when the exercise device is implemented
as a bicycle an arm pivot axis of an arm is fixed to the user's hip
joints, the exercise machine includes a propelling device for
propelling the bicycle by rotating when the arm rotates clockwise
and idling when the arm rotates counterclockwise to drive a rear
wheel.
SUMMARY
[0010] In general, a user performs an exercise for strengthening
thigh and hip muscles by pulling the legs toward the chest and
pushing them outward with the pelvis as an axis, as shown in FIG. 1
Also, in a general bicycle, since a high hip motion range is
limited to a rotation radius of a crank connected to a bicycle
pedal, as shown in FIG. 2, the user's exercise is repeatedly
performed only in a relatively small space when compared to the
high hip motion range, and thus exercise efficiency in utilization
of thigh and hip muscles is limited.
[0011] According to the present disclosure, an exercise method and
an exercise device for strengthening thigh and hip muscles reduce a
load applied to the legs by enabling a user to have a sitting,
lying, or prone position during an exercise activity. Also, the
exercise method and the exercise device minimize a load transmitted
to the knees and ankle joints by enabling the user to move his/her
legs after locating lower ends of arm portions on his/her thigh
instead of the ankles or soles. The exercise method and the
exercise device improve the exercise effect of strengthening thigh
and hip muscles by increasing a hip joint motion range and a
rotation axis.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a view illustrating a general hip joint motion
range in a sagittal plane;
[0013] FIG. 2 is a view illustrating a motion range of a bicycle
crank;
[0014] FIG. 3 is a view for describing an exercise device according
to an embodiment of the present disclosure to which a load block is
attached as a resistive force generator;
[0015] FIG. 4 is a perspective view of the exercise device
according to an embodiment of the present disclosure to which a
disk device is attached as a resistive force generator;
[0016] FIG. 5 is a view for describing an exercise device according
to an embodiment of the present disclosure implemented as a
stationary bicycle;
[0017] FIG. 6 is a view for describing the exercise device
according to another embodiment of the present disclosure to which
the load block is attached as a resistive force generator;
[0018] FIG. 7 is a view for describing the exercise device
according to another embodiment of the present disclosure to which
two sets of load blocks are attached as a resistive force
generator;
[0019] FIG. 8 is a view for describing the exercise device
according to another embodiment of the present disclosure to which
one set of load blocks is attached as a resistive force
generator;
[0020] FIG. 9 is a view for describing the exercise device
according to another embodiment of the present disclosure to which
an elastic body is attached as a resistive force generator;
[0021] FIG. 10 is a view for describing the exercise device
according to another embodiment of the present disclosure to which
the disk device is attached as a resistive force generator;
[0022] FIG. 11 is a view for describing the exercise device
according to another embodiment of the present disclosure to which
a shaft changing device is attached to be rotatable about an x-axis
(parallel to the ground);
[0023] FIG. 12 is a view for describing the exercise device
according to another embodiment of the present disclosure to which
the shaft changing device is attached to be rotatable about a
y-axis (perpendicular to the ground);
[0024] FIG. 13 is a view for describing the exercise device
according to another embodiment of the present disclosure
implemented as a stationary bicycle;
[0025] FIG. 14 is a view for describing the exercise device
according to another embodiment of the present disclosure
implemented as a moving bicycle;
[0026] FIG. 15 is a view illustrating a state in which the exercise
device of FIG. 14 is used;
[0027] FIG. 16 is a partial view illustrating a state in which the
shaft changing device of the present disclosure is changed to be
rotatable about the x-axis (parallel to the ground);
[0028] FIG. 17 is a partial view illustrating a state in which the
shaft changing device of the present disclosure is changed to be
rotatable about the y-axis (perpendicular to the ground);
[0029] FIG. 18 is a partial view illustrating a state in which two
axes are provided on one arm and the arm is rotatable about both
the x-axis (parallel to the ground) and the y-axis (perpendicular
to the ground) according to the present disclosure;
[0030] FIG. 19 is an exploded perspective view of the shaft
changing device of FIG. 18;
[0031] FIG. 20 is a partial perspective view illustrating a state
in which the shaft changing device of the present disclosure is
changed to be rotatable about the x-axis;
[0032] FIG. 21 is an exploded perspective view of the shaft
changing device of FIG. 20;
[0033] FIG. 22 is a partial view of a propelling member of the
exercise device according to another embodiment of the present
disclosure implemented as a bicycle;
[0034] FIG. 23 is a partial enlarged view of the propelling member
of the exercise device according to another embodiment of the
present disclosure implemented as a bicycle;
[0035] FIG. 24 is a partial enlarged view of the propelling member
of the exercise device according to another embodiment of the
present disclosure implemented as a bicycle;
[0036] FIG. 25 is a plan view of the propelling member of the
exercise device according to another embodiment of the present
disclosure implemented as a bicycle; and
[0037] FIG. 26 is a plan view of the exercise device according to
another embodiment of the present disclosure implemented as a
stationary bicycle and including the shaft changing device.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0038] In the following description, well-known elements are not
described in detail since they would obscure the invention with
unnecessary detail. Various modifications and alternatives may be
made in the present disclosure, and embodiments will herein be
described in detail. It should be understood, however, that there
is no intent to limit embodiments to the particular forms
disclosed, but on the contrary, embodiments are to cover all
modifications, equivalents, and alternatives falling within the
scope of the present disclosure. The terminology used herein is for
the purpose of describing embodiments only and is not intended to
be limiting of embodiments. It will be further understood that the
terms "comprises", "comprising", "includes", and/or "including",
when used herein, specify the presence of stated features,
integers, elements, components, and/or groups thereof but do not
preclude the presence or addition of one or more other features,
integers, elements, components, and/or groups thereof.
[0039] Embodiments of an exercise for strengthening thigh and hip
muscles of the present disclosure for accomplishing the objectives
will now be described with reference to the attached drawings.
[0040] FIGS. 1 and 2 are views respectively illustrating a general
hip joint motion range in a sagittal plane and a motion range of a
bicycle crank. FIGS. 3, 6, 7, and 8 are views illustrating a state
in which an exercise device according to an embodiment of the
present disclosure includes a load block 71 as a resistive force
generator. FIGS. 4 and 10 are views of the exercise device
according to an embodiment of the present disclosure to which a
disk device including a disk holder 59 and a disk 60 is attached.
FIG. 9 is a side view of the exercise device according to an
embodiment of the present disclosure, illustrating a state in which
an elastic body 75 is provided as a resistive force generator and a
ground strut elastic body fixing portion 117 and an arm portion
elastic body holder 116 for fixing the elastic body 75 are
attached.
[0041] As shown in FIGS. 3 through 8, the exercise device according
to an embodiment of the present disclosure includes a seat 20
configured to support a user in a sitting position, an arm
connector 33, a pivot axis 44 of an arm 100 of an arm portion 32
located on a rear lower end of the seat 20 when being seen in a
sagittal plane (a plane that divides the body into right and left
parts), the arm portion 32 pivotably connected to the arm connector
33, and a thigh pad 56 having a plate shape and rotatably connected
to a lower end of the arm portion 32 and placed on the user's
thigh. The exercise device according to an embodiment of the
present disclosure is to train thigh and hip muscles while
protecting the user's knees and ankle joints by enabling the user
to locate the thigh pad 56 on his/her thigh in a sitting or lying
position on the seat 20 and lower his/her legs and push them
backward. The arm connector 33 is provided under a saddle of the
seat 20, or is mounted on a frame 10 including a saddle strut 13, a
bottom strut 16 and a ground cross strut 14. One or more arm
portions 32 and one or more frames 10 may be provided. The frame 10
may be a stationary bicycle-like frame fixed to the ground without
wheels as shown in FIG. 5. The exercise device according to an
embodiment of the present disclosure may be configured in any of
various methods and forms (e.g., the exercise device may include
the load block 71 as shown in FIGS. 5, 6, 7, and 8). A detailed
configuration is illustrated and will be described in detail. The
exercise device according to an embodiment of the present
disclosure includes a resistive force generator configured to
generate a resistive force when the arm portion 32 pivots and a
connector configured to connect the resistive force generator to
the frame 10. For example, as shown in FIGS. 3, 7, and 8, the
resistive force generator may include the load block 71. In order
to generate a resistive force when the arm portion 32 pivots, as
shown in FIG. 16, the load block 71 is connected by a wire 118 (see
FIG. 8) to the arm connector 33 including a roller 48 that rotates
about the pivot axis 44 when the arm 100 pivots and a roller base
77 that supports and surrounds the roller 48.
[0042] Optionally, as shown in FIG. 9, the resistive force
generator includes a seat arm connector 41 extending from an end of
the arm portion 32, the elastic body 75 configured to generate a
resistive force when the arm portion 32 pivots, the arm portion
elastic body holder 116 configured to fix one end of the elastic
body 75, and the ground strut elastic body fixing portion 117
located behind a rear ground support member 19 and configured to
fix the other end of the elastic body 75. Optionally, as shown in
FIGS. 4 and 10, the resistive force generator includes the arm
connector 33 extending from an upper end of the arm portion 32
along a rotation axis x, a balance maintaining member 49 extending
to maintain balance, and the disk holder 59 on which a disk may be
placed. One resistive force generator may be provided as shown in
FIGS. 3, 6, and 8 or multiple resistive force generators may be
provided as shown in FIGS. 4 and 7. In addition, the resistive
force generator may generate a resistive force against the pivoting
of the arm portion 32. Furthermore, the exercise device according
to an embodiment of the present disclosure includes an indoor
stationary bicycle in which a cylindrical thigh pad 57 is connected
in a .right brkt-bot.-shape to a roller or a wheel 119 as shown in
FIG. 5.
[0043] The exercise device according to another embodiment of the
present disclosure includes an arm angle adjustment assembly 34
(see FIG. 11) configured to adjust an open angle between the user's
legs as shown in FIGS. 11, 12, 16, 17, and 21. As shown in FIGS. 16
and 17, the arm angle adjustment assembly 34 for adjusting an open
angle of the user's legs includes a rotating plate 45 integrally
formed with an arm base, a casing 46 integrally formed with an arm
fixing portion 42, and an index pin configured to indicate an open
angle of the arm. Optionally, the arm angle adjustment assembly 34
may include an arm angle sliding portion 37 (see FIG. 21) sliding
into the arm base and may adjust and fix an angle by inserting a
bolt into an insertion hole formed in the arm angle sliding portion
37.
[0044] The exercise device according to an embodiment of the
present disclosure includes a foot plate 61 located on a lower end
of the frame 10, the seat 20, or the arm portion 32, as shown in
FIGS. 4, 6, 7, and 12. As shown in FIG. 12, a foot plate connector
62 pivotably connected to the arm portion 32 and the thigh pad 56
is provided on the foot plate 61. In addition, as shown in FIGS. 6
and 7, the exercise device according to an embodiment of the
present disclosure includes, on a lower end of the frame 10, the
seat 20, or the arm portion 32, a knee support 63 configured to
support the user's knees, a torso support 26 configured to support
the user's torso, and a front handle 114 held by the user for
postural stability. The exercise device according to an embodiment
of the present disclosure illustrated in FIGS. 4, 6, and 7 operates
with the user's abdomen leaning on the torso support 26. FIGS. 11,
12, and 13 illustrate the exercise device according to an
embodiment of the present disclosure that operates with the user's
back leaning on the torso support 26.
[0045] The exercise device according to an embodiment of the
present disclosure includes an angle adjusting member including a
casing 35 integrally formed with the arm portion 32 and connected
to the arm pivot axis 44 and an angle adjustment plate 36
integrally formed with the arm connector 33 and connected to the
frame 10 in order to set a start interval of a motion range of the
arm, as shown in FIG. 4. Also, the exercise device according to an
embodiment of the present disclosure includes a torso support angle
adjustment plate 29 configured to adjust an angle of the torso
support 26 for user convenience so that the user may adjust an
inclination angle of the user's torso in a lying or sitting
position, as shown in FIGS. 11 and 12. The exercise device
according to an embodiment of the present disclosure includes an
arm length adjusting portion 52 configured to adjust and fix an
interval between the arm portion 32 and the seat 20. In order for
the user to maintain postural stability when using the exercise
device, the exercise device according to an embodiment of the
present disclosure includes the front handle 114 (see FIGS. 3
through 15) or a rear handle 115 (see FIGS. 12 and 26) on the frame
10, an upper end support 11, or a lower end of the seat 20.
[0046] In the exercise device according to an embodiment of the
present disclosure, as shown in FIGS. 18 and 19, the arm connector
33 including the roller base 77 (referred to as `first roller base
77`) configured to support rotation of the roller 48 (referred to
as `first roller 48`) about an x-axis parallel to the ground
includes a second roller 111 perpendicularly intersecting the first
roller base 77 and configured to rotate about a second arm pivot
axis 113 parallel to a y-axis perpendicular to the ground, a second
bearing 112 configured to support rotation of the second roller
111, and a second roller base 110 (see FIG. 19) provided on an end
of the first roller base 77 and configured to support rotation of
the second roller 111. A rotation axis of the arm portion 32 is on
both the y-axis perpendicular to the ground and the x-axis parallel
to the ground, and thus the arm rotates in a three-dimensional (3D)
space. Accordingly, the user's lower body may rotate in both a
plane perpendicular to the ground and a plane parallel to the
ground. Furthermore, a position and a direction of the thigh holder
may be adjusted according to a motion direction of the user's lower
body.
[0047] The exercise device according to an embodiment of the
present disclosure includes a shaft changing portion, and the first
roller base 77 connected to the arm portion 32 is connected by a
hinge 74 to the arm connector 33 as shown in FIGS. 12, 16, 20, 21,
and 26, and thus when a hinge base 98 pivots about a hinge axis 99
of the hinge 74 and is horizontally located (embodiment of FIG.
17), the pivot axis 44 of the arm portion 32 is placed on the
y-axis perpendicular to the ground, and when the hinge base 98
pivots about the hinge axis 99 of the hinge 74 and is vertically
located (embodiment of FIG. 16), the pivot axis 44 of the arm
portion 32 is placed on the x-axis parallel to the ground. Thus the
user may adjust a direction of the pivot axis of the arm portion
with respect to the ground in accordance with the user's body part
to be trained.
[0048] In the exercise device according to an embodiment of the
present disclosure, as shown in FIGS. 14 and 15, the pivot axis 44
of the arm portion 32, when being seen in a sagittal plane, is
located vertically within 20 cm and horizontally within 20 cm from
the front and back of the user's hip joints on the seat 20. The
thigh pad 56 having a plate shape is rotatably connected to a lower
end portion of the arm portion 32 and is placed on the user's
thigh. As shown in FIG. 22, the exercise device according to an
embodiment of the present disclosure implemented as a bicycle
includes a series of driving force transmitting portions located on
an end of the arm portion 32 or an end of the thigh pad 56 and
configured to transmit a driving force to a driving wheel of the
bicycle. A knee support configured to fix and support the user's
knees may be provided. The exercise device according to an
embodiment of the present disclosure implemented as a bicycle 82
includes a propelling member configured to propel the bicycle 82 by
rotating when the arm portion 32 rotates clockwise and idling when
the arm portion 32 rotates counterclockwise to drive a rear
wheel.
[0049] As shown in FIG. 22, the propelling member includes a
propelling device connected to the pivot axis and a driven sprocket
97 provided on a side of a rear wheel on a rotation axis of the
rear wheel, and a chain 96 connected to the propelling member and
the driven sprocket 97.
[0050] An embodiment of the propelling member includes, as
illustrated in FIGS. 22 and 23, a pivot axis free wheel 85 coupled
to the pivot axis 44, a roller 89 coupled to a surface of a driving
sprocket 88, a roller contact bar 90 provided on a surface of the
roller 89 to be pivotable about a rotation axis 90a, and a stopper
91 located outside a radial direction of the roller 89 about the
rotation axis 90a of the roller contact bar 90 to be misaligned
with the rotation axis 90a of the roller contact bar 90 and
configured to prevent the roller contact bar 90 from rotating by a
predetermined angle or more. When the pivot axis free wheel 85
coupled to the pivot axis 44 rotates counterclockwise, the roller
contact bar 90 pivotably provided on the roller 89 coupled to the
driving sprocket 88 rotates clockwise about the rotation axis 90a,
and the driving sprocket 88 coupled to the roller 89 idles because
a pivoting force of the pivot axis free wheel 85 is not transmitted
to the driving sprocket 88 coupled to the roller 89. In contrast,
when the pivot axis free wheel 85 coupled to the pivot axis 44
rotates clockwise, although a force is applied to rotate the roller
contact bar 90, pivotably provided on the roller 89 coupled to the
driving sprocket 88, counterclockwise about the rotation axis 90a,
the stopper 91 that is located adjacent to the roller contact bar
90 blocks additional rotation of the roller contact bar 90 to
prevent the roller contact bar 90 from further rotating, and thus
the roller 89 rotates and the driving sprocket 88 connected to the
roller 89 also rotates.
[0051] As shown in FIGS. 24 and 25, another embodiment of the
propelling member included in the exercise device according to an
embodiment of the present disclosure includes the pivot axis 44
having an outer circumferential surface on which a screw thread is
formed, the driving sprocket 88 provided on the pivot axis 44 and
allowing the chain 96 to be connected thereto, a driving sprocket
wheel 95 integrally fixed to a spindle 92 coupled to the pivot axis
44, a three side contact free wheel 86 screwed onto a side of the
spindle 92 at a side of the driving sprocket 88 on the pivot axis
44 and configured to idle about the pivot axis 44 during
counterclockwise rotation and rotate along with the driving
sprocket wheel 95 during clockwise rotation, a bearing 94 (see
FIGS. 19 and 21) having a horizontal cylindrical shape and located
on a central portion of a side surface of the pivot axis 44 of the
arm portion, and a propelling member base 93 coupled to a central
axis of the bearing 94 and having a cut hole into which the three
side contact free wheel 86 is inserted.
LISTING OF REFERENCES
[0052] U.S. Pat. Nos. 5,746,688, 5,135,457, U.S. Patent Application
Publication No. US2011/0301002, Korean Patent Application
Publication No. 10-2014-0056481, Japanese Patent No. 4478208, and
Japanese Patent Application Publication No. 09-266958 disclose
prior art for exercise machines in the related technical field.
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