Information
-
Patent Grant
-
6730002
-
Patent Number
6,730,002
-
Date Filed
Friday, September 28, 200122 years ago
-
Date Issued
Tuesday, May 4, 200420 years ago
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Inventors
-
Original Assignees
-
Examiners
- Lucchesi; Nicholas D.
- Nguyen; Tam
Agents
-
CPC
-
US Classifications
Field of Search
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International Classifications
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Abstract
An improved lift apparatus for use in an exercise device having a support base and a moveable element is disclosed. The moveable element can be selectively raised and lowered relative to the support base by the user during operation of the exercise device. The improved lift apparatus includes: (i) a first lift motor; (ii) a second lift motor; and (iii) a synchronization mechanism for synchronizing the first and second lift motors. A belt safety mechanism for controlling unanticipated movement of the endless belt is also disclosed.
Description
BACKGROUND OF THE INVENTION
1. The Field of the Invention
The present invention relates to the field of exercise equipment. More specifically, the present invention relates to exercise equipment having an inclining tread apparatus.
2. The Relevant Technology
The desire to improve health and advance cardiovascular efficiency has increased in recent years. This desire is coupled with the desire to exercise in locations that are within a limited space such as within an individual's home or an exercise gym. This trend has led to an increased desire for the production of exercise equipment.
For example, inclining apparatuses have become very popular. Walking or running on an inclined surface requires a user to raise the user's knees in continual, strenuous strides. This requires more exertion than walking or running on a flat surface. Consequently, exercising on an inclined surface can provide a more intense, challenging workout.
Inclining apparatuses come in a variety of types and configurations, such as treadmills and climbing apparatuses. The treadmill provides a flat endless moving assembly upon which the user can walk or run. Climbing apparatuses typically feature an endless moving assembly positioned at a significant angle and often allow significant lateral movement.
Inclining apparatuses often include a lift mechanism such as a motor or motor/lever assembly for inclining and declining the support frame. Lift motors used in these lift mechanisms often must be small and compact to accommodate the esthetic and space limitations inherent in the designs demanded by home and exercise gym consumers. The drawback of smaller more compact motors is that to provide the lifting force often demanded by such systems, the motors become impractically large or prohibitively expensive.
Increased lifting force is often required with the increased weight requirements of more robust inclining apparatuses. The stronger components of the inclining element of such apparatuses are also heavier than in the smaller units. More robust units are popular for commercial use, such as in exercise gyms, where repetitive use requires more sturdy construction. However, commercial use demands more lifting force than the affordable and more compact lifting motors can provide.
Another problem inherent in many inclining exercise apparatuses is the freewheeling of the endless belt. When the drive system is not engaged and a force is applied to the endless belt, in some motor configurations, the endless moving assembly moves freely in response to the force. Such arrangements can cause unexpected movement of the endless belt when a user inadvertently steps on the belt.
SUMMARY AND OBJECTS OF THE INVENTION
It is therefore an object of the invention to provide an improved exercise apparatus.
It is another object of the invention to provide a lifting apparatus for a moveable element that utilizes a plurality of lift motors to provide increased lifting force.
It is another object of the invention to provide a synchronization mechanism for minimizing variations in the operation of the first and second lift motors.
It is another object of the invention to provide a synchronization mechanism that is a mechanical mechanism for synchronizing operation of first and second lift motors.
It is another object of the invention to provide a synchronization mechanism that is a software or hardware implementation for synchronizing operation of first and second lift motors.
It is another object of the invention to provide a tolerance regulator mechanism for ensuring that operation of first and second lift motors does not exceed a predetermined variation.
It is another object of the invention to provide a synchronization mechanism that is a hybrid mechanical and software or hardware design for coordinating operation of first and second lift motors.
It is another object of the invention to provide a control module for monitoring operation of the first and second lift motors.
It is another object of the invention to provide a circuit switching mechanism for switching counter assignments where motor control assignments are switched.
It is another object of the invention to provide a belt safety mechanism to regulate unanticipated movement of the endless belt.
An inclining exercise apparatus of the present invention comprises a first and second lift motor and a synchronization mechanism. The first and second lift motors are coupled to a moveable element and to the synchronization mechanism. The synchronization mechanism is coupled to a support base of the exercise apparatus. In a neutral position, the moveable element is configured such that a support frame is substantially parallel to the support surface. The distal end of the support frame selectively inclines above the neutral position and selectively declines below the neutral position.
The inclining apparatus of the present invention benefits from increased lifting capacity due to the incorporation of a plurality of lift motors without sacrificing cost efficiency or compactness of the motors. An additional benefit of this system is that manufacturers of lift motors can utilize existing lift motor configurations of smaller exercise apparatuses without having to develop and manufacture special motors for heavier exercise apparatuses.
A challenge when using multiple motors is synchronizing operation of the motors. Where the lift motors exert slightly unequal forces or provide slightly unequal extension, normal operation of the exercise apparatus can easily be disturbed. These disruptions can render multiple lift motor configurations impracticable. To deal with these challenges, the exercise apparatus of the present invention utilizes a synchronization mechanism. The synchronization mechanism, in one embodiment, comprises a mechanical mechanism. The mechanical mechanism includes a sway bar, a cross support, and a pivot mechanism. The first lift motor is coupled to a sway bar first end. The second lift motor is coupled to a sway bar second end. The sway bar allows minor variations in the operation of the first and second lift motors to be minimized by pivoting of the sway bar.
The synchronization mechanism, in another embodiment, comprises a control module. The control module comprises a first sensor and a first counter; a second sensor and a second counter; and a logic element. The first sensor and first counter monitor operation of the first lift motor. The second sensor and second counter monitor operation of the second lift motor. The logic element utilizes the information from the first and second sensors and first and second counters to control operation of the first and second motors. In an alternative embodiment, the synchronization mechanism also comprises a combination of the recited mechanical mechanism and control module.
A tolerance regulator is provided in the present invention. The tolerance regulator comprises first and second contact switches. When the operation of first and second lift motors exceeds a given variation, the sway bar pivots about the pivot mechanism to the extent that the first or second contact switch is triggered by interaction with the cross support. The triggering of the contact switch discontinues normal operation of the first and second lift motors until variation is reduced and synchronization is restored.
A switching circuit is provided in the present invention. The switching circuit utilizes the first and second counters and the logic element to determine if the first motor is operating in response to commands sent to first motor or is operating in response to commands sent to second motor. Similarly, the switching circuit enables the second motor to determine if the second motor is operating in response to commands sent to the second motor or is operating in response to commands sent to the first motor. If it is determined that the motors are operating in response to commands sent to the other motor, the switching circuit switches counter assignment in the logic element. Switching counter assignment allows for proper operation of the control module in maintaining synchronization in the event that motors are receiving signals sent to one another.
Another feature of the exercise apparatus is a belt safety mechanism. The belt safety mechanism prevents unpredictable movement of the endless belt. The belt safety mechanism comprises a motion detector, a drive system, and a belt movement regulator. The motion detector monitors movement of the endless belt and whether the movement of the endless belt is in response to user input or is unanticipated. Where the movement is unanticipated, the belt movement regulator starts the drive system and consequently starts movement of endless belt for a preset interval at a predetermined slow speed. The belt safety mechanism additionally sends an audible and/or visual prompt to user to start exercising with appropriate input to exercise apparatus.
These and other objects and features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the manner in which the above recited and other advantages and features of the invention are obtained, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
FIG. 1
is a perspective view of an exemplary exercise device in which the lift apparatus is used.
FIG. 2
illustrates the sway bar mechanism; illustrating the mechanical linkage and the first and second lift motors.
FIG. 3
illustrates the sway bar mechanism pivotally coupled to the support base.
FIG. 4
is a front cut-away view of the lift apparatus in an exercise device in an inclined position.
FIG. 5
is a perspective view of the lift apparatus in an exercise device in a neutral position.
FIG. 6
is a perspective view of the lift apparatus in an exercise device in the inclined position.
FIG. 7
is functional block diagram of the present invention illustrating the monitoring system for maintaining the first and second motors in a predefined rotational parameter.
FIG. 8
is a flow chart illustrating the logic of the control module counter system.
FIG. 9
is a depiction of a lift motor assembly and counter system.
FIG. 10
is a schematic view of a tolerance regulator illustrating first and second contact switches.
FIG. 11
is a flow chart illustrating the logic of the mechanism for swapping assignment of first and second counters.
FIG. 12
is a block diagram of the belt safety mechanism illustrating the belt movement regulator, the motion detector, and the safety module.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
With reference now to
FIG. 1
, a selectively inclining and selectively declining exercise apparatus
10
is shown in which the present invention is employed. Exercise apparatus
10
supports a user ambulating thereon, such as in a hiking, running, or walking mode.
Exercise apparatus
10
comprises a support base
12
and a user support frame
14
, upon which a user ambulates, movably coupled thereto. Support frame
14
comprises (i) first and second elongate frame rails
17
a
,
17
b
; (ii) first and second rollers
36
a
and
36
b
(
FIG. 5
) mounted on opposing ends of the first and second frame rails
17
a
,
17
b
; and (iii) an endless belt
15
trained about the rollers
36
a
,
36
b
. Support frame
14
has a proximal end
24
, a distal end
26
, and an inner portion
28
therebetween.
Support frame
14
is one example of a movable element. However, a variety of different moveable elements may be movably coupled to the base
12
or to a variety of other support bases. Thus, base
12
is depicted to show one embodiment of a support base and support frame
14
is depicted to show one embodiment of a movable element movably coupled thereto. However, a variety of different support bases and movable elements movably coupled thereto may be employed in the present invention, such as those disclosed in U.S. application Ser. No. 09/496,569, filed Feb. 2, 2000, entitled “Hiking Exercise Apparatus,” which is incorporated herein in its entirety by reference, for example, and a variety of others.
Exercise apparatus
10
further comprises (i) a handrail assembly
16
coupled to the support base
12
; and (ii) a lift apparatus
18
. Support base
12
has a proximal end
20
and a distal end
22
.
As depicted in
FIG. 1
, in an incline position, support frame
14
is capable of inclining to extreme angles such that the distal end
26
is high above the neutral position. The lift apparatus
18
of the present invention enables a user to incline support frame
14
to such angles.
With reference now to
FIG. 2
, lift apparatus
18
of the present invention is shown. The lift apparatus
18
comprises a first lift motor
30
, a second lift motor
32
, and a synchronization mechanism
34
configured to synchronize the first and second lift motors
30
,
32
. The synchronization mechanism
34
may comprise a synchronization mechanism comprising mechanical components. Synchronization mechanism
34
may also comprise hardware such as an application specific integrated circuit or any other suitable hardware configuration. Synchronization mechanism
34
may also comprise software such as computer-executable instructions, associated data structures, program modules, and other routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Synchronization mechanism
34
and the other synchronization mechanisms disclosed herein are examples of means for synchronizing the first and second lift motors
30
,
32
. Various examples of the synchronization mechanism
34
will be discussed in additional detail below.
In the illustrated embodiment synchronization mechanism
34
comprises a mechanical linkage
42
coupled to base
12
. Mechanical linkage
42
comprises a sway bar
44
and a fixed cross support
46
. Sway bar
44
comprises a sway bar first end
50
, a sway bar center
54
, and a sway bar second end
52
. The first lift motor
30
is coupled to the sway bar first end
50
and the second lift motor is coupled to sway bar second end
52
. First and second lift motors
30
and
32
are fixedly pivotally coupled to sway bar
44
, as illustrated in FIG.
2
. Lift motors
30
and
32
are comprised of driving elements,
60
and
62
respectively, and lift arms,
70
and
72
respectively. Driving elements
60
and
62
provide the electro-mechanical force necessary to extend lift arms
70
and
72
. Extension of lift arms
70
and
72
provides the mechanical force necessary to lift the moveable element.
While other lift motor systems also allow a user to incline support frame of an exercise apparatus, the lift apparatus of the present invention utilizes first and second lift motors
30
and
32
are alternatively fixedly coupled to sway bar
44
.
Lift motors
30
and
32
are comprised of driving elements,
60
and
62
respectively, and lift arms,
70
and
72
respectively. Driving elements
60
and
62
provide the electro-mechanical force necessary to extend lift arms
70
and
72
. Extension of lift arms
70
and
72
provides the mechanical force necessary to lift movable support frame
14
, or optionally another embodiment of a moveable element.
While other lift motor systems also allow a user to incline support frame of an exercise apparatus, the lift apparatus of the present invention benefits from utilizing two synchronized lift motors. The use of two synchronized lift motors enables lift motor system of the present invention to lift heavier loads than could be lifted by a comparable single lift motor. Additionally, because the first and second lift motors
30
and
32
are synchronized, complications from minor variations in the operation of the motors, such as twisting of movable support frame
14
are prevented.
With reference now to
FIG. 3
, there is shown mechanical linkage
42
coupled to support base
12
. Cross support
46
of mechanical linkage
42
comprises a cross support first end
80
, a cross support center
84
, and a cross support second end
82
. Cross support first end
80
is coupled to a first lateral side
90
of support base
12
. Cross support second end
82
is coupled to second lateral side
92
of support base
12
. Cross support center
84
is coupled to sway bar
44
. In alternative embodiment, mechanical linkage
42
is coupled to movable frame
14
and first and second lift motors
30
and
32
are coupled to support base
12
.
As shown in
FIG. 3
, sway bar center
54
is pivotally coupled to cross support center
84
. In the preferred embodiment, cross support center
84
further comprises a sway bar brace
96
that extends distally toward sway bar
44
from cross support
46
. Sway bar brace
96
provides adequate displacement between sway bar
44
and cross support
46
to allow sway bar
44
to pivot about the axis of a pivot mechanism
98
, such as a pin, a bolt, or any other mechanism that allows sway bar
44
to pivot with respect to cross support
46
or any other mechanism allowing sway bar
44
to pivot about the axis of cross support center
84
.
Extension of lift arm
70
of first lift motor
30
exerts a force against sway bar first end
50
. In the absence of an equal and offsetting force from the extension of lift arm
72
of second lift motor
32
, the sway bar
44
will rotate about the axis of pivoting mechanism
98
, the sway bar first end
50
rotating in the direction of cross support first end
80
. Alternatively extension of the lift arm
72
of second lift motor
32
exerts a force on sway bar second end
52
. If not offset by an equal and offsetting force from extension of lift arm
70
, the sway bar
44
will rotate about the axis of pivoting mechanism
98
, the sway bar second end
52
rotating in the direction of cross support second end
82
. Thus, mechanical linkage
42
, and more particularly the sway bar
44
component of the mechanical linkage
42
, is able to offset minor variations in the operation of first lift motor
30
and second lift motor
32
by compensating for unequal forces applied by the lift motors. By synchronizing operation of motors
30
and
32
, mechanical linkage
42
allows a substantially equal force to be exerted on the opposing sides of moveable support frame
14
(see
FIG. 2
) by lift arms
70
and
72
.
With reference now to
FIGS. 4-6
, the selectively inclining and selectively declining exercise apparatus
10
is further shown. These figures illustrate lift apparatus
18
in additional detail. As depicted in
FIG. 4
, lift arms
70
and
72
of respective first lift motor
30
and second lift motor
32
are coupled to movable support frame
14
. Movable support frame
14
is movably coupled to base
12
. In the preferred embodiment, coupling between moveable support frame
14
and lift motors
30
and
32
is pivotal. This allows for changes in the angle between support frame
14
and support base
12
.
FIG. 5
illustrates exercise apparatus
10
with support frame
14
in a neutral position. In the neutral position, first and second lift arms
70
and
72
of first and second lift motors
30
and
32
are in a retracted position.
FIG. 6
illustrates exercise apparatus
10
with support frame
14
in an inclined position. In the inclined position, the lift arms
70
and
72
of the first and second lift motors
30
and
32
are in an extended position. The mechanical linkage
42
ensures that a synchronized force is exerted on support frame
14
from lift arms
70
and
72
.
In the preferred embodiment, cross support
46
is coupled to first and second lateral sides
90
and
92
of support base
12
near the proximal end
20
of support base
12
. In this embodiment, the lift arms
70
and
72
of first and second lift motors
30
and
32
are coupled distally therefrom.
In an alternative embodiment the cross support
46
is coupled to first and second lateral sides
90
and
92
of support base
12
near the distal end
22
of support base
12
. In this embodiment, the lift arms
70
and
72
of first and second lift motors
30
and
32
are coupled toward the proximal end
43
of movable support frame
14
.
In another embodiment, the lift arms
70
and
72
, of the first and second lift motors
30
and
32
are indirectly coupled to the support frame
14
or other moveable element, such as by being coupled to lever arms that are coupled to the support frame
14
. The lever arms are coupled to the support base
12
and the movable support frame
14
. The movement of the lift arms
30
and
32
exerts a force on lever arms necessary to raise and lower the moveable element.
In yet another embodiment, first and second lift motors
30
and
32
are coupled to a telescoping handrail assembly. The telescoping handrail assembly is coupled to movable support frame
14
. This causes movable support frame
14
and support frame
14
to raise and lower with the corresponding movement of the handrail assembly
16
.
These embodiments are merely illustrative, and should not be considered to limit the scope of the present invention. It will be understood by those skilled in the art, that a variety of coupling configurations allowing synchronization of a plurality of lift motors may be utilized without departing from the scope of the present invention.
With reference now to
FIG. 7
, there is depicted via block diagrams another embodiment of a synchronization mechanism configured to synchronize first and second lift motors
30
and
32
is shown. The synchronization mechanism of
FIG. 7
comprises a control module
100
. Control module
100
may be employed in combination with, or independently from the mechanical synchronization mechanism
34
discussed above.
In this embodiment, control module
100
maintains first and second lift motors
30
and
32
in a predefined rotational parameter, as discussed below.
Control module
100
comprises a control circuit
110
, a counter system
120
, and a control panel
130
. The control circuit
110
may comprise hardware such as a processor and memory, an application specific integrated circuit, and/or any other suitable hardware configuration. Alternatively the control circuit
110
may comprise software such as computer-executable instructions, associated data structures, program modules, and/or other routines, programs, objects, components, or data structures, etc. that perform particular tasks or implement particular abstract data types. Control circuit
110
is one example of a logic means for automatically controlling operation of the first and second lift motors such that the difference between the first and second counters does not exceed a predefined value.
The control circuit
110
controls operation of the first and second lift motors. The control circuit
110
ensures that the difference between the first and second counters does not exceed a predefined value by sending messages to the first and second lift motors
30
and
32
and receiving feedback from the counter system
120
. The control circuit
110
also sends output to the control panel
130
and receives input from user via the control panel
130
. The control circuit comprises a processor
112
and a memory system
114
. The processor produces output to the counter system
120
, the control panel
130
, and to the first and second lift motors
30
and
32
.
The input from the control panel may comprise a variety of data including: (i) user instructions; (ii) system functioning information; and/or lift commands to the lift motors. The processor
112
receives feedback from the counter system
120
and the control panel
130
. The memory system
114
records data received from the processor
112
as well as information necessary for running the processor
112
. Information for running the processor
112
includes commands, algorithms, and/or other data. Such information may be embedded in an electronic chip, software, database, or any other memory system as is known to those skilled in the art. Processor
112
conveys data to memory system
114
. Memory system
114
provides information to processor
112
necessary for functioning of the processor
112
.
Control panel
130
comprises output devices
132
for relaying information to the user and input devices
134
for allowing the user to input commands to control module
100
. This allows the control circuit
110
to request user input and allows the user to input commands for operation of the lift motors and other systems of the exercise device
10
.
Counter system
120
comprises a first and second sensor
122
and
124
and a first and second counter
126
and
128
. Sensors monitor operation of first and second lift arms
70
and
72
, thus monitoring operation of first and second lift motors
30
and
32
. First and second counters
126
and
128
tabulate increments detected by first and second sensor
122
and
124
from first and second lift motor
30
and
32
.
In response to user input from input devices
134
, processor
112
sends commands to first and/or second lift motors
30
and
32
to lift or retract. First and second sensors
122
and
124
monitor when lift arms
70
and
72
rotate through a predefined rotational angle.
When first and second lift arms
70
and
72
rotate through a predefined rotational angle in a first direction, first and second counters
126
and
128
record an increment. When first and second lift arms
70
and
72
rotate through a predefined rotational angle in a second direction, first and second counters
126
and
128
record a decrement. With each increment or decrement, as recorded by first and second counters
126
and
128
, corresponding data representing counter change is sent to processor
112
for processing.
With reference now to
FIG. 8
, a flowchart demonstrating operation of control module
100
for synchronizing first and second lift motors
30
and
32
is shown. As disclosed, one method of the present invention comprises a step of detecting a command to lift motors
131
. Upon detecting a command sent to lift motors, the determination of whether there has been rotation through a predefined rotational angle in the first motor
133
is made. Where there has been no rotation through a predefined rotational angle in the first motor, the step of not changing first counter
137
is executed. Where there has been rotation through a predefined angle in the first motor, the step of determining whether motor is turning in the first rotational direction
140
is executed.
Where the motor has turned in the first rotational direction, the step of incrementing first counter
144
, as is represented by the equation (A+1)=Y, is executed. Where the first motor has turned, but not in a first rotational direction, the step of decrementing counter
150
, as represented by the equation (A−1)=Y, is executed.
Using the new counter value as represented by Y in both increment step
144
or decrement step
150
, the step of inputting the Y value
154
is then executed, the Y value representing the current counter tally in the first counter.
Upon detecting a command sent to lift motors (see step
131
) and at the same time the determination of rotation through a predefined angle in first motor (see step
133
) is made, another determination of whether there has been rotation through a predefined angle in the second motor is also executed at step
135
. In the absence of rotation through a predefined angle in the second motor, the step of not changing second counter
139
is executed. If there has been rotation through a predefined angle in the second motor, the determination of whether the second motor is turning in a first rotational direction is executed (see step
142
).
If the second motor has turned in a first rotational direction, then the step of incrementing second counter
146
, as represented by the equation (B+1)=Z, is executed. Where the second motor has turned, but not in a first rotational direction, the step of decrementing the second counter
152
, as represented by the equation (B−1)=Z, is executed. Using the new counter value, as represented by Z in both increment step
146
and decrement step
152
, the step of inputting the Z value
156
is executed, the Z value representing the current counter tally in second counter.
Using the Y value from step
154
and the Z value from step
156
, the step of calculating an X value
158
is executed using the equation of Y−Z=X, wherein X is an absolute value. Using the X value from step
158
, a determination of whether X is less than a predetermined parameter value is made at step
160
. Where X is less than a predetermined parameter value, the step of continuing normal operation
162
of lift apparatus
18
is executed. Where X is greater that the predetermined parameter value, the step of discontinuing the normal operation
164
of lift apparatus
18
is executed.
Thus, as demonstrated by
FIGS. 7-8
, control module
100
synchronizes operation of first and second lift motors
30
,
32
by ensuring that variation in the operation of first and second lift motors
30
,
32
does not exceed a predetermined parameter value. The predetermined parameter value represents a degree of variation between operation of first and second lift motors
30
and
32
that could cause problems with the normal operations of the exercise system
10
. Such problems could include twisting of the support frame
14
or interference with the normal operation of the endless belt
15
.
In the event that variation between first and second lift motors
30
and
32
does exceed the predetermined parameter value, the step of discontinuing normal operation
164
is conducted. This step of discontinuing normal operation
164
can include such acts as simply shutting down lift motors
30
and
32
. It can also include a more complicated process of temporarily shutting down lift motors
30
and
32
and engaging in a troubleshooting process in an attempt to correct variation and bring X within the predetermined parameter value. In one embodiment, control module will correct variations in operations of lift motors when such variations are less than would cause problems with normal operation of exercise apparatus. For example, control module may engage in corrective processes any time variation is one half of the variation normally associated with problematic operation.
Referring now to
FIG. 9
, there is shown an embodiment of counter system
120
. For the sake of illustration, first lift motor
30
and the manner in which counter system
120
monitors the extension and retraction of the lift arm
70
of first lift motor
30
is shown. As demonstrated in
FIG. 7
, the counter system also monitors the extension and retraction of lift arm
72
of second lift motor
32
. Counter system
120
, by monitoring the operation of both first and second lift motors
30
,
32
allows control module
100
to synchronize operation of first and second lift motors
30
,
32
. Due to the substantial similarity in the functioning of counter system
120
in first and second lift motors
30
,
32
, in the current embodiment, illustration of the manner in which counter system
120
monitors first lift motors
30
is sufficient.
With reference now to
FIGS. 7-9
, counter system
120
comprises sensor
122
and counter
126
.
FIG. 9
represents a depiction of first lift motor
30
, first sensor
122
, and first counter
126
. In one embodiment, second lift motor
32
, second sensor
124
, and second counter
128
are comprised in the same or similar manner.
In one present embodiment, sensor
122
is integrally coupled to first lift motor
30
. Sensor
122
is coupled to counter
126
via a signal transducting mechanism
172
. In one preferred embodiment, signal transducting mechanism
172
comprises an electric wire but alternatively may comprise a wireless signal mechanism, a mechanical mechanism, or any of a plurality of other known signal mechanisms, for example, as will be recognized by those skilled in the art.
In the embodiment of
FIG. 9
, first lift motor
30
comprises a lead screw drive mechanism
61
, a lead screw gear
63
, lead screw
70
, and a lift motor housing
173
. Upon receiving a command from processor
112
, lead screw drive mechanism
61
begins rotating lead screw gear
63
, which in turn rotates lead screw
70
. Upon receiving a command to raise moveable support frame
14
, lead screw gear
63
rotates in a first direction extending lead screw
70
. In response from a command from processor
112
to lower movable support frame
14
, lead screw gear
63
rotates in a second direction recessing lead screw
70
.
In one embodiment, sensor
122
comprises a magnetic sensor. In this embodiment, sensor
122
is configured to detect a magnetic marker
170
coupled to the lead screw gear
63
. A given rotational angle of lead screw gear
63
represents a given displacement of lead screw
70
. Sensor
122
recognizes rotation of lead screw
70
through a predefined rotational angle by detection of the magnetic marker
170
. Detection of magnetic marker
170
in combination with data representing rotational direction of lead screw
70
enables counter
126
to increment or decrement in correspondence with whether lead screw
70
is extending or recessing. The number of magnetic markers
170
may be selected according to a predetermined parameter.
With continued reference to
FIGS. 7-9
, the counter system provides valuable data to the control module. For example, if 180 degree rotation of lead screws
70
,
72
represents the displacement amount that is monitored by the control module, and one complete rotation of lead screw gear
63
turns lead screw 180 degrees, a single magnetic marker
170
can be used. Consequently, sensors
122
,
124
will recognize each 180 degree rotation of the respective lead screws
70
,
72
. In this embodiment, each increment and decrement represents a 180 degree rotational angle and the corresponding displacement of lead screws
70
,
72
. According to this embodiment, the predetermined parameter value representing the variation of first and second lift motors
30
,
32
is based on increments, each of which represent a 180 degree rotation of lead screws
70
,
72
. A representative parameter value (see step
160
of
FIG. 8
) may be two (2) increments. Using this representative parameter value of X=2, each time the rotation of lead screws
70
,
72
of first and second lift motors
30
,
32
differ more than one full rotation (i.e., more than 360 degrees), the control module will discontinue normal operation of the first and second lift motors
30
,
32
(see step
164
of FIG.
8
).
As will be recognized by those skilled-in-the-art,
FIG. 9
represents one illustrated embodiment of the manner in which counter sensor system
120
monitors lift motors
30
,
32
. Other embodiments of counter system
120
may include other sensor configurations such as optical, mechanical or any of a plurality of sensors. For example, a sensor circuit may electrically monitor functioning of lift motor
31
and calculate the corresponding displacement of lead screw
71
. Placement of magnetic marker
170
and the corresponding configuration of sensors
124
,
126
may also vary. One or more magnetic makers
170
may be embedded on the lead screw or the drive mechanism. Additionally, other embodiments of lift motors
30
,
32
may include other cam mechanisms such as hydraulic or electrical cams that could be used in place of lead screw lift motors.
The synchronization mechanisms described with reference to
FIGS. 7-9
are additional examples of means for synchronizing the first and second lift motors. These mechanisms may be employed in conjunction with or independently from the mechanical synchronization mechanism discussed with reference to
FIGS. 2-6
.
To act as a fail safe for the synchronization mechanisms of
FIGS. 1-6
and/or
FIGS. 7-9
, the exercise apparatus of the present invention may further comprise a tolerance regulator
180
. Tolerance regulator
180
maintains variations between first and second lift motors
30
and
32
within a predetermined parameter. Tolerance regulator
180
comprises a first contact switch
182
and a second contact switch
184
. Tolerance regulator
180
operates by discontinuing normal operation of lift motors
30
and
32
in the event that first contact switch
182
or second contact switch
184
is triggered. In one embodiment, first contact switch
182
is coupled to the first end of a sway bar
50
. The second contact switch
184
is coupled to the second end of a sway bar
52
. It will be appreciated by those skilled in the art in light of this disclosure that a variety of detection mechanisms beside a contact switch could be placed in a variety of configurations without departing from the spirit of the invention.
In the event that the extension of the lift arms
70
and
72
begins to vary, the sway bar
44
will rotate about the axis of the pivot mechanism
98
. The sway bar first end
50
or sway bar second end
52
will be forced in the direction of cross support
46
. In the event that variation in the operation of first and second lift arms
70
and
72
exceeds the predefined parameter, sway bar first end
50
or sway bar second end
52
will be moved close enough to cross support
46
to trigger first contact switch
182
or second contact switch
184
. In one embodiment, triggering the first or second contact switch discontinues operation of lift motors
30
,
32
. In another embodiment, triggering of one of the contact switches causes the lift motors to be corrected, e.g., by causing the control module
100
to enter a trouble shooting mode.
Thus, the tolerance regulator
180
can function as a backup safety mechanism in the event that control module
100
fails to properly synchronize operation of first and second lift motors
30
and
32
. Minor variations in operation of first and second lift motors
30
and
32
, which do not exceed the predetermined parameter, can continue to be offset by pivoting of sway bar
44
without triggering contact switches
182
and
184
. Thus, the system allows for normal operation of first and second lift motors
30
and
32
in the event that the variation does not exceed the predetermined parameter.
With reference now to
FIG. 11
, another mechanism that may be employed in the present invention is a switching circuit. The switching circuit may be useful in the event that: (i) wires for the lift motors are inadvertently switched (e.g., during repair); or (ii) in the event that commands designed to be delegated to a first motor are actually performed by a second motor.
FIG. 11
shows a flowchart demonstrating the logic of a switching circuit for swapping assignment of first and second counters
126
and
128
. In this method, a determination of whether a command has been sent to a lift motor
200
is made. In the event it is determined that no command has been sent to a motor, the step of ending execution
206
is conducted. If a command has been sent to a lift motor, a determination of whether command has been sent to first motor
202
is made. In the event that it is determined that a command has been sent to first motor, a determination of whether the first counter is incremented or decremented
210
is conducted. In the event that the first counter has incremented or decremented, the step of maintaining the current counter assignment
212
a
is executed. Where the first counter has not incremented or decremented, a determination of whether the second counter has incremented or decremented
214
is made. In the event that it is determined that second counter has incremented or decremented, the step of reassigning counters to new motors
216
a
is executed. Where it is determined that the second counter has not incremented or decremented, the step of maintaining current counter assignment
212
a
is conducted.
Where it is determined that a command has been sent to a motor and that the command was not sent to the first motor, switching circuit executes the step of assuming that the command was sent to second motor
204
. Where it is assumed that the command was sent to second motor, a determination of whether second counter has been incremented or decremented
220
is conducted. If it is determined that second counter has been incremented decremented, the step of maintaining current counter assignment
212
b
is executed. In the event that it is determined that second counter has not incremented or decremented, the determination of whether the first counter has incremented or decremented
224
is conducted. Where the first counter has incremented or decremented, switching circuit executes the step of reassigning counters to new motors
216
b
, i.e., counter
126
is reassigned to second motor
32
and counter
128
is reassigned to first motor
30
(see FIG.
7
). Where the first counter has not incremented or decremented, the step of maintaining current counter assignment
212
b
is conducted by the switching circuit.
The switching circuit of
FIG. 11
enables system to determine whether second motor
32
is operating in response to commands sent to first motor
30
or is operating in response to commands sent to second motor
32
, and vice versa. Switching of commands may occur in response to a faulty system repair where wires were improperly attached to the wrong motors. It may also occur due to a mistake within the implementation of the software or control circuit. The switching circuit may be a useful tool in maintaining synchronization of first and second motors
30
and
32
. By correcting the assignment of first and second counters
126
and
128
, commands temporarily sent to the wrong motors can be reassigned thus eliminating a possible cause of variation between the first and second motors
30
and
32
. Furthermore correcting assignment of first and second counters allows control module
100
to operate properly.
The exercise apparatus
10
may be further comprised of a variety of different mechanisms that assist in various manners in the operation of the exercise apparatus
10
. For example, it may be useful to employ a belt safety mechanism to prevent inadvertent and unexpected movement of the endless belt, such as when a user steps on the belt without intending to move the belt.
With reference now to
FIG. 12
, there is shown a block diagram of a belt safety mechanism
260
for use in exercise device
10
. Belt safety mechanism
260
comprises a belt movement regulator
230
and a motion detector
240
. Belt movement regulator
230
may comprise hardware such as processor and memory, an application specific integrated circuit, and/or any other suitable hardware configuration. Alternatively the belt movement regulator
230
may comprise software such as computer-executable instructions, associated data structures, program modules, and/or other routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Belt movement regulator
230
is one example of a means for regulating movement of the endless belt.
As is illustrated in
FIG. 12
, there is also shown a lift motor
30
(one or more lift motors may be employed), an endless belt
15
, belt
230
comprises a processor
112
and a safety module
232
. The safety module
232
is coupled to processor
112
. The processor
112
executes logic commands to prevent unanticipated movement of endless belt
15
. The safety module
232
sends a message prompt to user in response to engagement of endless belt
15
. As will be understood by those skilled-in-the-art, safety module
232
may merely be coupled to the processor
112
and operate independently of processor. Alternatively, safety module
232
may be integrated in the pra drive system
250
(comprising, e.g., a tread motor that turns a roller about which the endless belt is trained), and a control panel
130
of the exercise device
10
. In the preferred embodiment, the belt movement regulator
230
comprises a processor
112
and a safety module
232
. The safety module
232
is coupled to processor
112
.
The processor
112
executes logic commands to prevent unanticipated movement of endless belt
15
. Unanticipated movement of the endless belt may occur, for example, movement of the endless belt without turning the exercise apparatus on. This may occur, for example, when a user steps on a treadmill belt without turning the treadmill on, such as when the user: (i) is walking from one end of a room to another and steps on the treadmill belt or (ii) attempts to ambulate (e.g., walk, hike, or run) on the treadmill belt without proper input into the control panel. The belt may move if the motor has no inherent braking power and the motor “freewheels”, allowing the belt to move. Unanticipated movement of the endless belt may also occur while the exercise machine is turned on, but the tread motor is not instructed to drive the belt.
Such unanticipated movements are examples of movement of the endless belt that results from a force independent from the drive system
250
. Belt movement regulator
230
is one example of a means for regulating movement of the endless belt when movement of the endless belt is unanticipated.
Motion detector
240
is configured such that it detects motion of the endless belt
15
. Motion detector
240
may detect motion of endless belt
15
by directly detecting motion of endless belt
15
. Alternatively, motion detector
240
detects motion of the endless belt indirectly by detecting motion of the drive system
250
(e.g., by detecting movement of the tread motor). Because the drive system (e.g., comprising the tread motor)
250
is coupled to the endless belt
15
, when the endless belt is moved by a force independent of the drive system, such as a user stepping on the treadmill belt, the drive system will also move
250
.
Upon detecting motion of endless belt
15
, motion detector
240
sends a signal to processor
112
indicating the movement of endless belt
15
. The processor
112
then determines whether motion of endless belt
15
was anticipated. Movement of the endless belt is considered to be anticipated when the processor
112
has received input from user input device
134
to actuate drive system
250
, causing belt
15
to move.
To determine whether movement of endless belt
15
was anticipated, the processor
112
monitors the presence or absence of input data from the control panel
130
. In the absence of input commands from the control panel
130
directing the belt
15
to move, the processor
112
assumes that any endless belt
15
movement is unanticipated, such as discussed above. As mentioned above, such unanticipated movements are examples of movement of the endless belt that results from a force independent from the drive system
250
.
The processor monitors whether the drive system
250
is actuated, i.e., whether the drive system
250
is moving the belt
15
. Where the drive system
250
is not actuated, but movement of the endless belt is detected, the processor
112
assumes the movement of the endless belt
15
was in response to a force independent of the drive system
250
, such as a force on the belt resulting from a user ambulating thereon when the drive system is not actuated. Alternatively, a force independent of the drive system could result from a user inadvertently making contact with the endless belt
15
. These are also examples of unanticipated movements of the endless belt.
If the processor
112
determines that the motion of the endless belt was anticipated, i.e., the result of the drive system
250
being actuated, a means for allowing normal functioning (not shown) of the drive system will allow the drive system
250
to operate normally. Means for allowing normal functioning of the drive system may comprise any software or hardware configuration which allows the system to operate normally in the event that movement of the drive system is anticipated.
If it is determined that the motion was unanticipated, movement regulator
230
sends a command to actuate the drive system
250
in order to begin movement of the endless belt
15
. To actuate the drive system
250
, means for actuating endless belt
15
is employed. Means for actuating endless belt
15
could comprise any hardware or software configuration which is able to turn on the drive system.
In the event the movement regulator
230
actuates drive system
250
in response to movement of the endless belt, safety module
232
sends a message prompt to the user. The message prompt may indicate to the user that the endless belt
15
is being moved by the drive system
250
and/or may indicate to the user the need to enter the proper input to move the belt. Safety module
232
may be coupled to the processor
112
and operate independently of processor. Alternatively, safety module
232
may be integrated in the processor
112
as an integrated circuit or software.
In one embodiment of the present invention, upon actuation by motion regulator
230
in response to unanticipated movement, drive system
250
moves the belt a predetermined slow speed for a preset interval. After the preset interval, the processor
112
can then disengage the drive system
250
.
In one embodiment, the belt safety mechanism
260
waits for a preset interval of drive system disengagement before monitoring the movement of endless belt
15
. The preset interval of drive system disengagement allows endless belt
15
to stop moving when there is no force independent from the drive system moving the belt. However, in one embodiment, where such an independent force is still being applied to the belt after the period of disengagement and in response to continued unanticipated movement of the endless belt
15
, the belt safety mechanism
260
actuates the drive system
250
for another preset interval. In another embodiment, belt safety mechanism
260
allows user override the disengagement with appropriate input into control panel
130
.
When motion regulator
230
actuates drive system
250
, safety module
232
sends a message prompt to an output device
132
of the control panel
130
. The message prompt may be an audible prompt, a visual prompt, or a combination of the two. The message prompt may instruct the user to start movement of the endless belt
15
, for example. Thus, in the event that user has attempted to begin exercising without the proper input to input device
134
of the control panel
130
, the belt safety mechanism
260
will engage the endless belt
15
at a predetermined slow speed and encourage user to start the endless belt
15
with appropriate input into input device
134
. In addition, in the event that the endless belt moves from a force other than the result of an attempt to begin the use of the exercise device, moving the endless belt
15
at a predetermined slow speed will prevent unexpected and unpredictable freewheeling motion of the endless belt
15
that could result in harm to the user.
The motion detector
240
may be a magnetic sensor, for example. However, as will be appreciated by those skilled in the art, the motion detector
240
may comprise a variety of different motion detecting mechanisms, including but not limited to, a mechanical, electrical, and/or optical sensor.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims
- 1. An improved lift apparatus for use in an exercise device having a support base and a moveable element, wherein the moveable element can be selectively raised and lowered relative to the support base by the user during operation of the exercise device, and wherein each of the support base and the moveable element have opposing first and second sides, the improved lift apparatus comprising:a first lift motor coupled between the support base and the moveable element; a second lift motor coupled between the support base and the moveable element; and means for synchronizing the first and second lift motors, wherein the means for synchronizing comprises a sway bar, the sway bar having a longitudinal axis, wherein the sway bar pivots about an axis other than said longitudinal axis.
- 2. An improved lift apparatus as recited in claim 1, wherein the means for synchronizing comprises:a cross support rigidly connected to the first and second sides of the support base; and wherein the sway bar has a first end, a center, and a second end, wherein the sway bar is pivotally coupled to the cross support, and wherein the first lift motor is coupled to the first end of the sway bar and the second lift motor is coupled to the second end of the sway bar, such that the sway bar compensates for variation between the first and second lift motors.
- 3. An improved lift apparatus as recited in claim 1, wherein the means for synchronizing comprising:a cross support rigidly connected to the first and second sides of the support base; wherein the sway bar has a first end, a center, and a second end, wherein the sway bar is pivotally coupled to the cross support, and wherein the first lift motor is coupled to the first end of the sway bar and the second lift motor is coupled to the second end of the sway bar, such that the sway bar compensates for variation between: (i) the displacement of the first motor; and (ii) the displacement of the second motor.
- 4. An improved lift apparatus as recited in claim 1, wherein the means for synchronizing comprises:a cross support rigidly connected to, and extending between, the first and second sides of the support base and having a first end, a center, and a second end; wherein the sway bar has a first end, a center, and a second end, wherein the sway bar is pivotally coupled to the cross support, and wherein the first lift motor is coupled to the first end of the sway bar and the second lift motor is coupled to the second end of the sway bar, such that the sway bar compensates for relatively minor variations in the operation of the first and second lift motors.
- 5. An improved lift apparatus as recited in claim 1, wherein the first and second lift motors are pivotally coupled to the movable element.
- 6. An improved lift apparatus as recited in claim 1, further comprising a tolerance regulator.
- 7. An improved lift apparatus as recited in claim 6, wherein the tolerance regulator comprises first and second contact switches, wherein an end of the sway bar will trigger one of the first or second contact switches in the event that the variation in operation of the first and second lift motors exceeds a given rotation parameter.
- 8. An improved lift apparatus as recited in claim 7, wherein the tolerance regulator disengages the first and second lift motors upon triggering one of the first or second contact switches.
- 9. An improved lift apparatus as recited in claim 1, wherein the means for synchronizing the first and second lift motors further comprises a control module for monitoring the first and second lift motors and maintaining the first and second lift motors within a predefined parameter relative to one another.
- 10. An improved lift apparatus as recited in claim 1, wherein the first and second lift motors comprise lead-screw type lift motors.
- 11. An improved lift apparatus as recited in claim 10, wherein the means for synchronizing the first and second lift motors further comprises a control module for monitoring the rotation of the first and second lift motors and maintaining the first and second lift motors within a predefined rotational parameter relative to one another.
- 12. An improved lift apparatus for use in an exercise device having a support base and a movable element, wherein the movable element can be selectively raised and lowered relative to the support base by the user during operation of the exercise device, wherein each of the support base and the moveable element have opposing first and second sides, the improved lift apparatus comprising:a first lift motor coupled between the support base and the moveable element; a second lift motor coupled between the support base and the moveable element wherein the first and second lift motors comprise lead-screw type lift motors; and means for synchronizing the first and second motors, wherein the synchronizing means comprises a control module for monitoring the rotation of the first and second lift motors and maintaining the first and second lift motors within a predefined rotational parameter relative to one another; and wherein the control module comprises: a first sensor and a first counter associated with the first lift motor, wherein the first sensor detects rotation of the first lift motor, increments the first counter each time the first lift motor rotates through a predefined rotational angle in a first rotational direction, and decrements the first counter each time the first lift motor rotates through a predefined rotational angle in a second rotational direction; a second sensor and a second counter associated with the second lift motor, wherein the second sensor detects rotation of the second lift motor, increments the second counter each time the second lift motor rotates through a predefined rotational angle in the first rotational direction, and decrements the second counter each time the second lift motor rotates through a predefined rotational angle in the second rotational direction; and logic means, coupled to the first and second counters and to the first and second lift motors, for automatically controlling the operation of the first and second lift motors such that the difference between the first and second counters does not exceed a predefined value.
- 13. An improved lift apparatus for use in an exercise device having a support base and a movable element, wherein the movable element can be selectively raised and lowered relative to the support base by the user during operation of the exercise device, wherein each of the support base and the moveable element have opposing first and second sides, the improved lift apparatus comprising:first lift motor coupled between the support base and the movable element; a second lift motor coupled between the support base and the moveable element; wherein the first and second lift motors comprise lead-screw type lift motors; and means for synchronizing the first and second motors, wherein the synchronizing means comprises a control module for monitoring the rotation of the first and second lift motors and maintaining the first and second lift motors within a predefined rotational parameter relative to one another; and wherein the control module comprises: a first sensor and a first counter associated with the first lift motor, wherein the first sensor detects rotation of the first lift motor, increments the first counter each time the first lift motor rotates through a predefined rotational angle in a first rotational direction, and decrements the first counter each time the first lift motor rotates through a predefined rotational angle in a second rotational direction; a second sensor and a second counter associated with the second lift motor, wherein the second sensor detects rotation of the second lift motor, increments the second counter each time the second lift motor rotates through a predefined rotational angle in the first rotational direction, and decrements the second counter each time the second lift motor rotates through a predefined rotational angle in the second rotational direction; and a control circuit, coupled to the first and second counters and to the first and second lift motors, for automatically controlling the operation of the first and second lift motors such that the difference between the first and second counters does not exceed a predefined value.
- 14. An improved lift apparatus as recited in claim 12, further comprising magnetic markers coupled at one or more positions on the lead screw gear of the first and second lift motors, wherein the positions represent a predefined rotational angle wherein the first and second sensors detect the one or more magnetic marker and the first and second counters increment or decrement based on the rotational direction of the motors.
- 15. An improved lift apparatus as recited in claim 14, wherein the predefined rotational angle comprises an angle of 180 degrees.
- 16. An improved lift apparatus as recited in claim 15, wherein the control module disengages the first and second lift motors when the variation between the first and second counters exceeds two increments.
- 17. An improved lift apparatus as recited in claim 12, wherein the logic means for controlling the operation of the first and second lift motors further comprises a switching circuit for switching assignment of the first and second counters; wherein the logic means upon recognizing the performance of a command delegated to the first motor by the second motor, switches assignment of the first and second counters.
- 18. An improved lift apparatus for use in an exercise device having a support base and a moveable element, wherein the moveable element can be selectively raised and lowered relative to the support base by the user during operation of the exercise device, and wherein each of the support base and the moveable element has opposing first and second sides, the improved lift apparatus comprising:a first lift motor coupled between the support base and the moveable element; a second lift motor coupled between the support base and the moveable element; and a synchronization mechanism configured to synchronize the first and second lift motors, the synchronization mechanism comprising a sway bar, the sway bar having a longitudinal axis, wherein the sway bar pivots about an axis other than said longitudinal axis.
- 19. An improved lift apparatus as recited in claim 18, wherein the synchronization mechanism further comprises a control module for monitoring the first and second lift motors and maintaining the first and second lift motors within a predefined parameter relative to one another and wherein the sway bar is coupled to each of the first and second lift motors.
- 20. An improved lift apparatus for use in an exercise device having a support base and a moveable element, wherein the moveable element can be selectively raised and lowered relative to the support base by the user during operation of the exercise device, and wherein each of the support base and the moveable element has opposing first and second sides, the improved lift apparatus comprising:a first lift motor coupled between the support base and the moveable element proximate the first side; a second lift motor coupled between the support base and the moveable element proximate the second side; and a mechanical linkage, interposed between the first and second lift motors and the support base, that compensates for variation between the first and second lift motors, wherein the mechanical linkage comprises a sway bar pivotally coupled to each of the first and second lift motors; and a control module for monitoring the first and second lift motors and maintaining the first and second lift motors within a predefined parameter relative to one another, the sway bar having a longitudinal axis, wherein the sway bar pivots about an axis other than said longitudinal axis.
US Referenced Citations (14)