U.S. patent application number 10/139559 was filed with the patent office on 2003-07-24 for lifting device for a treadmill.
Invention is credited to Wang, Leao, Wu, Peter.
Application Number | 20030139263 10/139559 |
Document ID | / |
Family ID | 29249772 |
Filed Date | 2003-07-24 |
United States Patent
Application |
20030139263 |
Kind Code |
A1 |
Wu, Peter ; et al. |
July 24, 2003 |
Lifting device for a treadmill
Abstract
The present invention relates to a lifting device for a
treadmill. A lifting motor with a locating transmission spindle is
pivotably connected to the front end of the base frame. A socket is
movable backward and forward by means of the rotational movement of
the locating transmission spindle while the other end of the socket
is pivotably connected to the top of an inverted-T-shaped cross bar
which extends beyond both sides of the base frame and is connected
with a pull rod, respectively. The other end of each of pull rod is
pivotably connected to the upright support, thereby forming a pivot
point. Accordingly, when the lifting motor is actuated to let the
socket rotate by means of the rotational movement of the locating
transmission spindle, the inverted-T-shaped cross bar and the pull
rod will move in the desired direction. Therefore, the base frame
will be moved upward and downward on the pivot point.
Inventors: |
Wu, Peter; (Taiping, TW)
; Wang, Leao; (Taiping, TW) |
Correspondence
Address: |
Kuo-Hsiung Chiu
Peitun District, 13F., No.23
Jiun-Ho Street
Taichung
406
TW
|
Family ID: |
29249772 |
Appl. No.: |
10/139559 |
Filed: |
May 7, 2002 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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10139559 |
May 7, 2002 |
|
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10053147 |
Jan 23, 2002 |
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Current U.S.
Class: |
482/54 |
Current CPC
Class: |
A63B 22/0023 20130101;
A63B 22/0235 20130101; A63B 2210/50 20130101 |
Class at
Publication: |
482/54 |
International
Class: |
A63B 022/02 |
Claims
What is claimed is:
1. A lifting device for a treadmill comprising: an upright support
mounted at both sides of the front end of a base frame, a console
being disposed at the top thereof while a horizontal leg is
connected to the bottom thereof; and a base frame having a first
cross bar on which a walking belt transmission assembly is mounted
while a front roller is driven in motion by means of a transmission
belt, a walking belt being rotatable by means of said front roller
and a rear roller, a support wheel being fitted to both bottom
inner sides at the rear end of said base frame; wherein the
improved lifting device for a treadmill is characterized by: a
lifting motor with a locating transmission spindle pivotably
connected to the front end of said base frame, a socket being
movable backward and forward by means of the rotational movement of
said locating transmission spindle while the other end of said
socket is pivotably connected to the top of an inverted-T-shaped
cross bar which extends beyond both sides of said base frame and is
connected with a pull rod, respectively, the other end of each of
said pull rods being pivotably connected to said upright support,
thereby forming a pivot point.
2. The lifting device for a treadmill as recited in claim 1,
wherein a support bar is pivotably connected at the lower side of
said inverted-T-shaped cross bar while the other end of said
support bar is pivotably connected to a support element so that the
axle of said support element is pivotably secured to a second cross
bar of said base frame.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a lifting device for a
treadmill, and more particularly, to a device which has simple
components and efficiently reduces the manufacturing and assembling
costs.
[0003] 2. Description of the Prior Art
[0004] The lifting device of the treadmill is used to adjust the
supporting angle of the base frame of the treadmill, that is, the
walking slope. This device can be mechanically or electrically
operated. The present invention belongs to an electric lifting
device.
[0005] Referring to FIGS. 5 through 8, a well-known lifting device
for a treadmill includes a motorized transmission assembly 61 on a
base frame 60. A slide rail 62 is arranged at the both inner sides
of the base frame 60 so that two supporting parts 64 with rollers
63 can slide in the slide rail 62 for a forward and backward
movement. Consequently, a walking frame 65 thereof is pivotably
connected to the top of the supporting parts 64.
[0006] In order to strengthen the supporting force of the
supporting parts 64, an auxiliary supporting rod 66 has to be
interposed between the top of the supporting parts 64 and the base
frame 60, thereby causing the complexity of the whole components
and increasing the assembly and component costs.
SUMMARY OF THE INVENTION
[0007] It is a primary object of the present invention to remove
the above-mentioned drawbacks and to provide a lifting device for a
treadmill which has a simple component unit while the same effect
is achieved so that the economical effect and the assembly
convenience are attainable. Meanwhile, the supporting force is
easily controllable. In addition, an upright support together with
a pull rod connected to the frame creates a pivot point.
Accordingly, the potential drawbacks in using the conventional
lifting device are removed.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The accomplishment of this and other objects of the
invention will become apparent from the following description and
its accompanying drawings of which:
[0009] FIG. 1 is a side view of the present invention;
[0010] FIG. 2 is a schematic drawing in accordance with FIG. 1,
showing the action thereof;
[0011] FIG. 3 is a schematic drawing of the preferred embodiment in
accordance with FIG. 1 in the folding-up state of a base frame;
[0012] FIG. 4 is a perspective view of FIG. 3;
[0013] FIG. 5 is a partial perspective view of a conventional
lifting device;
[0014] FIG. 6 is a side view of FIG. 5;
[0015] FIG. 7 is a schematic drawing in accordance with FIG. 5,
showing the action thereof; and
[0016] FIG. 8 is a schematic drawing in accordance with FIG. 5 in
the folding-up state of the base frame.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0017] First of all, referring to FIGS. 1 and 2, a preferred
embodiment of the present invention includes an upright support 10
and a base frame 20. The upright support 10 is mounted at both
sides of the front end of the base frame 20. A console 11 is 10
disposed at the top of the upright support 10 while a horizontal
leg 12 is connected to the bottom thereof. The base frame 20 has a
first cross bar 21 on which a walking belt transmission assembly 30
is mounted while a front roller 22 is driven in motion by means of
a transmission belt 32. A walking belt 24 is rotatable by means of
the front roller 22 and a rear roller 23. A support wheel 25 is
fitted to both bottom inner sides at the rear end of the base frame
20.
[0018] A lifting motor 41 with a locating transmission spindle 40
is pivotably connected to the front end of the base frame 20. A
socket 42 is movable backward and forward by means of the
rotational movement of the locating transmission spindle 40 while
the other end of the socket 42 is pivotably connected to the top of
an inverted-T-shaped cross bar 26 which extends beyond both sides
of the base frame 20 and is connected with a pull rod 27,
respectively. The other end of each of the pull rods 27 is
pivotably connected to the upright support 10, thereby forming a
pivot point 28. Accordingly, when the lifting motor 41 is actuated
to let the socket 42 rotate by means of the rotational movement of
the locating transmission spindle 40, the inverted-T-shaped cross
bar 26 and the pull rod 27 will move in the desired direction.
Therefore, the base frame 20 will be moved upward and downward on
the pivot point 28.
[0019] As illustrated in FIGS. 3 and 4, the base frame 20 can be
folded up in a storage state by means of the pivoting effect of the
pivot point 28. Thus, in order to stably support the base frame 20,
a support bar 50 is pivotably connected at the lower side of the
inverted-T-shaped cross bar 26 while the other end of the support
bar 50 is pivotably connected to a support element 52. Thereafter,
the axle of the support element 52 is pivotably secured to a second
cross bar 29 of the base frame 20.
[0020] In brief, when the base frame 20 is folded up, the support
element 51 constantly offers a proper supporting force in the
horizontal direction to prevent it from an unexpected toppling.
[0021] Many changes and modifications in the above-described
embodiment of the invention can, of course, be carried out without
departing from the scope thereof. Accordingly, to promote the
progress in science and the useful arts, the invention is disclosed
and is intended to be limited only by the scope of the appended
claims.
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