U.S. patent application number 11/039475 was filed with the patent office on 2006-07-27 for elevational adjusting device of exercise bicycle.
Invention is credited to Hai Pin Kuo.
Application Number | 20060166792 11/039475 |
Document ID | / |
Family ID | 36697590 |
Filed Date | 2006-07-27 |
United States Patent
Application |
20060166792 |
Kind Code |
A1 |
Kuo; Hai Pin |
July 27, 2006 |
Elevational adjusting device of exercise bicycle
Abstract
An elevational adjusting device is used in an exercise bicycle
which has a body capable of standing on the ground. The body is
movable by a treading operation. A cushion of the bicycle is
adjustable. The elevational adjusting device comprises an outer
tube having a hollow inner space and a long hole; an inner tube
being installed with a cushion at a top thereof; the inner tube
having a plurality of positioning holes which are positioned
corresponding to a position of the long hole of the outer tube; a
frame seat fixed to the outer tube; and a positioning unit having a
post; the positioning unit being positioned to the frame seat; the
positioning unit having a buckle bar capable of being buckled to
one of the positioning holes of the inner tube; a driving arm; and
a cam portion capable of resisting against an wall of the inner
tube.
Inventors: |
Kuo; Hai Pin; (Tainan,
TW) |
Correspondence
Address: |
Hai Pin, Kuo
235 Chung-Ho
Box 8-24
Taipei
TW
|
Family ID: |
36697590 |
Appl. No.: |
11/039475 |
Filed: |
January 21, 2005 |
Current U.S.
Class: |
482/57 |
Current CPC
Class: |
A63B 22/0605 20130101;
A63B 2225/093 20130101 |
Class at
Publication: |
482/057 |
International
Class: |
A63B 22/06 20060101
A63B022/06; A63B 69/16 20060101 A63B069/16 |
Claims
1. An elevational adjusting device of an exercise bicycle having a
body capable of standing on the ground, the body being movable by a
treading operation; a cushion of the bicycle being adjustable; the
elevational adjusting device comprising: an outer tube having a
hollow inner space and a long hole; an inner tube being installed
with a cushion at a top thereof; the inner tube having a plurality
of positioning holes which are positioned corresponding to a
position of the long hole of the outer tube; a frame seat fixed to
the outer tube; and a positioning unit having a post; the
positioning unit being positioned to the frame seat; the
positioning unit having a buckle bar capable of being buckled to
one of the positioning holes of the inner tube; a driving arm; and
a cam portion capable of resisting against an wall of the inner
tube; wherein by the buckle bar of the positioning unit being
buckled to the positioning hole of the inner tube; the inner tube
is positioned to the outer tube; the gravitational force of the
cushion will make the positioning unit to rotate along the post, so
that the cam portion resist against the wall of the inner tube;
thereby the inner tube and the outer tube are stably
positioned.
2. The elevational adjusting device of an exercise bicycle as
claimed in claim 1, wherein the positioning unit has a stopper; and
the frame seat has a sleeve for confining the stopper so that the
inner tube will not descend unlimitedly due to the wearing of the
cam portion of the positioning unit.
3. The elevational adjusting device of an exercise bicycle as
claimed in claim 1, wherein a spring is connected between the frame
seat and the positioning unit so as to further position the
positioning unit.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to bicycles, and in particular
to an elevational adjusting device of an exercise bicycle, wherein
by a buckle bar to buckle the positioning hole of the inner tube,
the inner tube and outer tube will not move relatively so as to
have a preferred stability. Furthermore, a cam portion of the
positioning unit tightly resists against the wall of the inner tube
so as to further increase the stability.
BACKGROUND OF THE INVENTION
[0002] In the prior art exercise bicycle cushion, the inner tube
and outer tube thereof are extendable and compressible so as to
adjust the height of the inner tube. Then a pin is fixed to a
positioning hole of the inner tube, so as to adjust the height of
the cushion. The prior art way is used for a long time. However the
prior art cannot firmly secures the inner tube to the outer tube so
that as it is used for a long time or a great force is applied to
the cushion, the inner tube will move relative to the outer tube so
that the elevation of the inner tube is changed.
SUMMARY OF THE INVENTION
[0003] Accordingly, the primary object of the present invention is
to provide an elevational adjusting device of an exercise bicycle,
wherein by a buckle bar to buckle the positioning hole of the inner
tube, the inner tube and outer tube will not move relatively so as
to have a preferred stability. Furthermore, in the present
invention, a cam portion of the positioning unit tightly resists
against the wall of the inner tube so as to further increase the
stability.
[0004] To achieve above objects, the present invention provides an
elevational adjusting device of an exercise bicycle. The bicycle
has a body capable of standing on the ground. The body is movable
by a treading operation. A cushion of the bicycle is adjustable.
The elevational adjusting device comprises an outer tube having a
hollow inner space and a long hole; an inner tube being installed
with a cushion at a top thereof; the inner tube having a plurality
of positioning holes which are positioned corresponding to a
position of the long hole of the outer tube; a frame seat fixed to
the outer tube; and a positioning unit having a post; the
positioning unit being positioned to the frame seat; the
positioning unit having a buckle bar capable of being buckled to
one of the positioning holes of the inner tube; a driving arm; and
a cam portion capable of resisting against an wall of the inner
tube.
[0005] Further objectives and advantages of the present invention
will become apparent from a careful reading of a detailed
description provided hereinbelow, with appropriate reference to
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 is a perspective view of the present invention.
[0007] FIG. 2 is an exploded view of the present invention.
[0008] FIG. 3 is a partial cross sectional view of the present
invention.
[0009] FIGS. 4 and 5 are schematic views about the operations of
the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0010] In order that those skilled in the art can further
understand the present invention, a description will be described
in the following in details. However, these descriptions and the
appended drawings are only used to cause those skilled in the art
to understand the objects, features, and characteristics of the
present invention, but not to be used to confine the scope and
spirit of the present invention defined in the appended claims.
[0011] Referring to FIG. 1, an exercise bicycle basically comprises
a body (not shown) capable of standing upon a ground. An outer tube
1 extends from the body. An inner tube 2 is received in the outer
tube 1. A top end of the inner tube 2 is installed with a cushion 9
for carrying a rider. A positioning unit 6 serves to adjust the
elevation of the inner tube 2.
[0012] With reference to FIG. 2, a long hole 11 is formed near a
top end of the outer tube 1. The inner tube 2 is received in an
inner hollow portion 10 of the outer tube 1. A plurality of
positioning holes 20 are formed on the inner tube 2. The
positioning holes 20 are positioned corresponding to the long hole
11 of the outer tube 1.
[0013] The frame seat 3 can be firmly secured to a periphery of the
long hole 11 of the outer tube 1. The frame seat 3 has a left wing
and a right wing 31 which are symmetrically arranged. Each wing 31
has a pinhole 32 at an upper side thereof and an axial hole 33 at a
lower end thereof. A notch 35 and a round hole 34 aside the notch
35 are formed at an upper wall connected the right and left wings
31. A sleeve 42 is placed in the notch 35. A pin 41 passes through
the right and left wings 31 and the pinhole 32. A post 43 passes
through the two axial holes 33. C rings 44 and 45 are fixed at
outer sides of the left and right wings 31 and clamp the post
43.
[0014] The positioning unit 6 is located between the right and left
wings 3 1 for positioning the inner tube 2. The positioning unit 6
is formed with an axial hole 60. A front upper end of the
positioning unit 6 is formed with a buckle bar 62. A rear end of
the positioning unit 6 is installed with a driving arm 61. A cam
portion 63 is formed at the front lower side of the positioning
unit 6 and is in front of the axial hole 60. A stopper 65 extends
from the driving arm 61. The post 43 passes through the axial hole
60 of the positioning unit 6. Thereby the positioning unit 6 is
installed between the left and right wings 31 of the frame seat 3
and thus is rotatable along the post 43.
[0015] A spring 7 has one end buckled to the round hole 34 of one
wing 31 and another end fixed to a cap 8. The cap 8 is screwed to a
screw hole 64 at a rear lower end of the positioning unit 6.
Thereby the assembly of the inner tube 2, outer tube 1, frame seat
3, and positioning unit 6 is complete.
[0016] The buckle bar 62 of the positioning unit 6 passes through
the long hole 11 and then inserts into one of the positioning holes
20 of the inner tube 2 so that the inner tube 2 is fixed to a
predetermined height. If it is desired to adjust the height of the
inner tube 2, namely the height of the cushion 9, the driving arm
61 of the positioning unit 6 is moved. Then the positioning unit 6
will rotate along the post 43 so that the buckle 62 separates from
the buckled positioning hole 20. Thereby the height of the inner
tube 2 is adjustable (referring to FIG. 3). When the inner tube 2
is adjusted to a predetermined height, the positioning unit 6 is
driven along an opposite direction so that the buckle bar 62 is
further buckled to another positioning hole 20 of the inner tube 2
(referring to FIG. 4). It is known that when the user sits on the
cushion 9 for exercise, the inner tube 2 suffers from a downward
pressure. Since the positioning unit 6 has the cam portion 63, when
the buckle bar 62 suffers from the gravitational force of the inner
tube 2, the positioning unit 6 will swing along the post 43. Then
the cam portion 63 will tightly resist against the wall of the
inner tube 2, as shown in FIG. 5. Simply, by the pressure from the
cam portion 63 of the positioning unit 6, the relative motion
between the inner tube 2 and outer tube 1 will be greatly reduced
so as to retain in a steady state. In the present invention, to
avoid the cam portion 63 not to position the inner tube 2 due to
wearing of the cam portion so that the inner tube 2 moves
downwards, the stopper 65 can be stopped by the sleeve 42. Thereby
the positioning unit 6 can not rotate unlimitedly along a direction
illustrated in FIG. 5 and the buckle bar 62 do not separate from
the positioning hole 20 so as to be retained in a steady state.
[0017] Thereby in the present invention, by the buckle bar 62 to
buckle the positioning hole 20 of the inner tube 2, the inner tube
2 and outer tube 1 will not move relatively so as to have a
preferred stability. Furthermore, in the present invention, the cam
portion 63 of the positioning unit 6 tightly resists against the
wall of the inner tube 2 so as to further increase the
stability.
[0018] Although this inventions has been described with a certain
degree of particularity, it is to be understood that the present
disclosure has been mad by may of example only and that numerous
changes in the detailed construction and the combination and
arrangement of parts may be resorted to without departing from the
spirit and scope of the invention as hereinafter clamed.
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