Audio modulation for a child motion device

(12) Ulllted States Patent
(10) Patent N0.:
Godiska et a].
(45) Date of Patent:
Inventors: James E_ Godiska, Exton, PA (Us);
William B- Bellows’ wyomissings PA
(Us) J h (J
)C A
1d IV
0 I?
A : 10/1992
5,525,113 A
5,754,094 A *
Marcus ........... ..
5,859,638 A
2/2000 Favorito e181.
6,339,304 B1
Ass1gnee: Graco Children s Product Inc., Exton,
PA (Us)
Subject to any disclaimer, the term of this
Allison et a1.
@2003 Kmh et 31‘
11/2004 Morita et al.
6,875,117 B2
4/2005 Ransil et a1.
7,046,230 B2
5/2006 Zadesky et al.
U.S.C. 154(1)) by 333 days.
( ommue )
(21) App1.N0.: 11/933,225
0 268 495
Oct. 31, 2007
Prior Publication Data
Us 2008/0165016A1
Colemann e181.
6,583,676 B2
6,814,670 B2
patent is extended or adjusted under 35
6/1996 Mitchell et al.
..... .. 472/119
5/1998 Frushour ............... .. 340/3847
6,027,409 A
Feb. 8, 2011
PhIlene/1131112133 (Us)
(22) F1led:
US 7,884,710 B2
Ju1~ 10’ 2008
Related US. Application Data
(60) Provisional application No. 60/855,894, ?led on Oct.
31, 2006.
Boppy Rock in Comfort Travel Swing, Product Details, Model
Primary ExamineriDaniel Wu
Assistant ExamineriRufus Point
(51) Int. Cl.
G08B 23/00
(74) Attorney, Agent, or FirmiLempia BraidWood LLC
us. Cl. ......................... .. 340/517; 472/33; 472/29;
(58) Field Of Classi?cation Search ............... .. 340/428,
A method of COPFYOHmg a_°h1_1d mom dew‘? Includes ‘,he
340/429 5731 692 472/280 297 4 46
steps of determrmng data 1nd1cat1ve of motron of the ch1ld
472/482 472 1’5 34 10 1’6 30 118? 4467411’
motion device, and controlling an audio output of the child
4 4 6 / 409’
motion device in accordance With the data. In some cases, the
See application ?le for Complete Search history'
controlling step includes the step of modulating the audio
References Cited
output in accordance With the data. For example, the modu
lating step may involve applying a modulation effect to an
2,765,168 A
10/1956 Taylor
audio track available to the child motion device.
21 Claims, 14 Drawing Sheets
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Page 2
Pratt, Analog Devices Application Note AN-829, “Environmental
Compensation on the AD7142: The Effects of Temperature and
7,419,436 B2 *
2003/0056288 A1
2003/0190967 A1*
2004/0259647 A1*
...................... .. 472/118
3/2003 Morita et al.
10/2003 Henry ...................... .. 472/128
12/2004 Wood et al. .
. 472/119
2005/0283908 A1* 12/2005 Wong et al.
2007/0205646 A1*
2008/0287035 A1*
.. ... ...
9/2007 Bapst et a1. .
Ballin ...... ..
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4/2009 Burgaard et al.
2009/0131185 A1*
. . . ..
. 297/2611
. 472/118
Speedie .................... .. 472/119
1 186 264
1 010 448
Humidity on Capacitance Sensors” (2005).
Pratt, Analog Devices Application Note AN-830, “Factors Affecting
Sensor Response” (2005).
Seguine et al., Cypress MicroSystems Application Note AN2292,
“Layout Guidelines for PSoC CapSense” (2005).
Seguine, Cypress MicroSystems Application Note AN2233a,
“Capacitive Switch Scan” (2005).
Bokma et al., Cypress MicroSystems Application Note AN2277,
“Capacitive Front Panel Display Demonstration” (2005).
Cypress Semiconductor Corporation product datasheet, “CSR User
ModuleiCY8C21X34 Data Sheet” (2005).
Honeywell product datasheet, “Linear/Angular/Rotary Displace
ment Sensors” HMC1501/HMC1512.
Koteeswaran, Cypress MicroSystems Application Note AN2097,
“Switch Mode Pump” (2003).
Kremin, Cypress MicroSystems Application Note AN2047,
Cypress “Motor Control with PSoC”.
“Ultrasound Motion Sensor” (2002).
Magarita, Cypress MicroSystems Application Note AN2227,
“CY3212iCapSense,” Revision A (2005).
“Brushless DC Motor Control” (2004).
Seguine, “Avoid False Key Activations in Capacitive Sensing”
* cited by examiner
US. Patent
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Sheet 1 0f 14
FIG. 1
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FIG. 8
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SEZO wm><w
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FIG. 2 is a perspective vieW of the child motion device of
FIG. 1 With a seat shoWn in exploded vieW for mounting in
one of several optional seating orientations.
FIG. 3 is a perspective vieW of the child motion device of
FIG. 1 With the seat mounted in one of the optional seating
This application claims the bene?t of US. provisional
application Ser. No. 60/855,894, entitled “Motion Control
Devices and Methods,” and ?led Oct. 31, 2006, the entire
FIG. 4 is a perspective vieW of a post and a seat base of a
support frame of the child motion device of FIG. 1 shoWn in
exploded vieW.
disclosure of Which is hereby expressly incorporated by ref
FIG. 5 is a perspective vieW ofa portion ofthe post ofFIG.
4 to shoW a user interface panel in greater detail.
FIG. 6 is a perspective vieW of exemplary drive and motor
control feedback systems con?gured in accordance With one
embodiment and shoWn removed from a housing of the post
of FIG. 4 in Which the systems are disposed.
1. Field of the Disclosure
The present disclosure is generally directed to child or
juvenile motion devices, and more particularly to devices and
methods for controlling the motion in such devices.
FIG. 7 is an elevational vieW of the drive and the motor
control feedback systems in greater detail.
FIG. 8 is a bottom vieW of the drive and motor control
2. Brief Description of Related Technology
Child motion devices such as conventional pendulum
sWings are commonly used to entertain and, sometimes more
importantly, to soothe or calm a child. A child is typically
placed in a seat of the device and then the device is directed to
feedback systems.
sWing the child in a reciprocating pendulum motion.
Unfortunately, many child motion devices exhibit a lack of
operational adjustability or adaptability. Past infant sWings
and other child motion devices have often been incapable of
adapting to changing operational conditions. Such devices
are likely to be Well-suited for only a narroW range of children
or operational circumstances. The inability to function cor
rectly With child occupants failing outside a certain Weight
FIG. 9 is a schematic vieW of an exemplary sensor board of
the motor control feedback system and/or user interface of
one of the child motion devices of FIGS. 1 and 9 and in
accordance With certain aspects of the disclosure.
FIG. 10 is perspective vieW of an alternative child motion
device suitable for incorporation of the sensor board of FIG.
9 for facilitating motor control and user interface functional
ity in accordance With one aspect of the disclosure.
FIG. 11 is a schematic circuit diagram of a control system
in accordance With various aspects of the disclosure.
FIG. 12 depicts a simpli?ed representation of an applied
range is one example Where past devices can fail to operate as
motor voltage that may be generated by the control system of
FIG. 11 in accordance With one aspect of the disclosure.
FIG. 13 is a How diagram of a motor voltage calibration
Lack of customiZation options can be another source of
technique that may be implemented by the control system of
inef?cacy. Occupant preferences can vary signi?cantly from
sequently, child motion products Without available adjust
FIG. 11 in accordance With one aspect of the disclosure.
FIG. 14 is a How diagram of an audio control technique that
ments or customiZation options may be effective With only a
may be implemented by the control system of FIG. 11 in
small subset of children, and then only for only a short period
accordance With one aspect of the disclosure.
FIG. 15 is a How diagram of an operational mode control
child to child, as Well as over time With a single child. Con
of time.
The control techniques relied upon in past child motion
devices have been knoWn to suffer from a number of limita
tions. The control techniques, and the electronics and other
FIG. 11 in accordance With one aspect of the disclosure.
While the disclosed systems, devices and methods are sus
ceptible of embodiments in various forms, there are illus
components involved in implementing them, have often been
inaccurate, ine?icient, or both. This can often lead to opera
tional drawbacks. For instance, the resulting motion can be
bumpy or jolting for the child occupant, as the device gener
ally fails to operate as intended. Other limitations of the
control electronics and related components lead to inef?cient
operation, Which can be signi?cant as many child motion
trated in the draWing (and Will hereafterbe described) speci?c
embodiments of the invention, With the understanding that the
disclosure is intended to be illustrative, and is not intended to
limit the invention to the speci?c embodiments described and
illustrated herein.
products are con?gured for battery poWer. Rapid depletions
of battery capacity are then likely to lead to further opera
tional problems.
These and other limitations of the control techniques and
related components can ultimately result in the device being
The disclosure is generally directed to child motion devices
and control techniques for the implementation of motion
based functions and operations of such devices.
motion device and control methods that provide a secure,
comfortable, and soothing environment in an ef?cient and
effective manner under a Wide range of operating conditions.
These aspects of the disclosure provide bene?ts to both the
child and the caregiver by creating multiple, neW Ways for the
caregivers to interact With their child and the device, by pro
viding neW soothing features that Will help calm a fussy child,
and by better functioning child motion devices. Several
aspects of the disclosure involve or include the application of
ineffective at calming, soothing or entertaining a child or
infant occupant.
technique that may be implemented by the control system of
Several aspects of the disclosure are directed to a child
Objects, features, and advantages of the present disclosure
Will become apparent upon reading the folloWing description
in conjunction With the draWing ?gures, in Which like refer
ence numerals identify like elements in the ?gures, and in
FIG. 1 is a perspective vieW of an exemplary child motion
device controlled in accordance With various aspects of the
electromechanical technologies like capacitive sensing. As
described beloW, some embodiments incorporate technolo
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gies like capacitive sensing in both user interface and motion
control contexts, simplifying the electrical layout of the child
device, and yet providing neW features.
Some aspects of the disclosure involve the application of
absolute sWing angle sensing to provide more reliable and
components, such as the drive system, of the device 20. Some
or all of the housing 29 may constitute a removable cover for
access to the interior or inner Workings of the device 20, if
needed. In any case, the housing 29 and, more generally, the
post 28, may vary considerably in orientation, shape, siZe,
repetitive sWing motion despite changes in operating condi
con?guration, and the like from the examples disclosed
tions. Other aspects involve an automated, self calibration
Other components of the frame assembly 21, such as the
routine that results in greater tolerance and performance
bands to be used in the device drive components, saving cost
and reducing device component complexity. Still other
aspects of the disclosure involve or include linking multiple
product functions into pre-de?ned or user-de?ned modes. In
base section 24, may also vary considerably in orientation,
siZe, shape, con?guration, and the like. Practice of the dis
closed methods and devices is not limited to the con?guration
of the exemplary frame assembly 21 described and shoWn in
connection With FIGS. 1-3. Notwithstanding the foregoing,
this manner, the child device can be tailored to best soothe or
entertain a child occupant While minimiZing setup and con
one or more components of the frame assembly 21 may be
Well suited for implementation of one or more aspects of the
disclosure, as described beloW.
As best shoWn in FIGS. 2 and 4, a driven end 32 of the
support arm 30 is coupled to a structural support, or Weight
?guration challenges otherWise imposed upon the caregiver.
Although described in connection With infant or child
sWings, the disclosed methods, devices and systems are Well
suited for use in connection With a variety of different child
motion devices. Practice of the disclosed methods, devices
and systems is accordingly not limited to the exemplary
bearing, portion 34 of the post 28. In this example, the support
sWings described herein.
In accordance With one aspect of the disclosure, the meth
ods and devices described herein determine position data in
real-time to apply poWer at correct points Within the motion
path of the child motion device. For example, applying poWer
at the correct points during a pendulum arc can provide e?i
arm 30 is cantilevered from the post 28 at the driven end 32.
The support arm 30 is mounted forpivotal, side-to-side move
ment about its driven end 32 through a travel path that is
substantially horizontal. Further details regarding the travel
path, as Well as other exemplary travel paths, can be found in
Us. Patent Publication No. 2007/0111809, entitled “Child
Motion Device,” the entire disclosure of Which is hereby
ciency advantages When the underlying position (or sWing
incorporated by reference. As described therein, the support
angle) data is determined in an accurate manner as described
arm 30 can travel through a partial orbit or arc segment of a
The various position and angle sensing techniques
predetermined angle and can rotate about an axis of rotation
that can be offset from a vertical reference and that can be
offset from an axis of the post 28. Alternatively, the axis of
rotation can be aligned With the vertical reference, the axis of
the post 28, or both, if desired. More generally, the driven end
32 is coupled to a drive system (FIGS. 6-8) disposed Within
the housing 29 and designed to reciprocate or oscillate a distal
described beloW may be used to implement functions other
than motion control feedback. In some cases, the same tech
niques may be utiliZed to support both motion control and
other functions. Moreover, some techniques may be used in
combination to supplement or facilitate the motion control
feedback or other functionality.
In accordance With other aspects of the disclosure, optimi
Zation of the operation of the motor is addressed via methods
end 35 of the support arm 30 to Which the seat frame 26 is i
attached for corresponding movement of the occupant seat
As described beloW, the device 20 includes a number of
and techniques that implement periodic or regular calibration
of the motor voltage. Such automatic calibration may adjust
the voltages that Work best or most e?iciently during, for
components directed to controlling and/or facilitating the
motion and other functionality of the device 20. In the
example shoWn, several of these control components are dis
example, start up or other in-use conditions. In some cases,
implementation of the methods and techniques results in a
posed on or in a control toWer 36 of the post 28. In some cases,
range of suitable voltages from Which a controller can select
a desired level for operation.
Turning noW to the draWing ?gures, FIGS. 1-3 shoW one
the control toWer 36 may also contain portions of the drive
system or structural support elements of the device 20. In this
example, the control toWer 36 has an upperpanel 37 to present
example of a child motion device 20 incorporating various
aspects of the disclosure. The device 20 in this example
generally includes a frame assembly 21 con?gured to support
an occupant seat 22 above the surface upon Which the device
an instrumentation, or control, interface to a caregiver direct
20 is disposed. A base section 24 of the frame assembly 21
rests upon the surface to provide a stable base for the device
20 While in-use. The frame assembly 21 also includes a seat
support frame 26 on Which the seat 22 is mounted. The seat
frame 26 is generally suspended over the base section 24 to
ing the operation of the device 20. The positioning and con
?guration of the instrumentation and other interface elements
may vary considerably from that shoWn. For instance, the
instrumentation need not be arranged in a single panel, but
rather may be distributed over multiple locations on the con
trol toWer 36 or other component of the device 20. Further
description of the elements and aspects of the user interface
55 are set forth beloW.
alloW reciprocating movement of the seat 22 during opera
tion. To that end, an upright post 28 of the frame assembly 21
In the example shoWn in FIGS. 1-3, the base section 24 of
the frame assembly 21 is in the form of an oval hoop or ring
extends upWard from the base section 24 to act as a riser or
siZed to provide a stable base for the device 20 When in use.
The con?guration of the base section 24 can vary from the
hoop as discussed in the above-referenced publication. The
base section 24 is positioned generally beneath the seat sup
port frame 26 in order to offset the load or moment applied to
the post 28 and created by a child placed in the seat 22 of the
cantilevered support arm 30.
The seat support frame 26 may vary considerably and yet
fall Within the spirit and scope of the present invention. In this
example, the seat support frame 26 is a square or rectangular
spine from Which a support arm 30 extends radially outWard
to meet the seat frame 26.
In this example, the post or spine 28 is oriented in a gen
erally vertical orientation relative to its longitudinal length.
The post 28 has an external housing 29 that may be con?gured
in any desired or suitable manner to provide a pleasing or
desired aesthetic appearance. The housing 29 can also be
functional, or both functional and ornamental. For instance,
the housing 29 can act as a protective cover for the internal
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ring de?ning an opening 38 (FIG. 2) to accept the seat 22. The
seat frame 26 may have a pair of pins 39 extending outward
from one side to engage corresponding, locking receptacles in
the elements of the user interface 50 described beloW may, but
need not, provide this dual functionality. Any one or more
elements of the user interface 50 may also provide such
the distal end 35 of the support arm 30, as shoWn in FIG. 4.
functionality in connection With multiple operations, func
While other con?gurations and constructions of the seat
support frame 26 are possible, the symmetrical shape of the
tions or aspects of the device 20. Moreover, some user inter
seat support frame 26 permits the seat 22 to be mounted on the
support arm 30 in a number of optional orientations. In this
ing upon the manner in Which the element is selected by the
caregiver. For example, a user interface element may initiate
different control actions depending on hoW long the button is
face elements may provide multiple control options depend
example, the child seat 22 can have a contoured bottom or
base 40 With features con?gured to engage With portions of
depressed (e.g., “press and hold” actuation), or Whether the
the seat support frame 26 so that When it is rested on the seat
linear side segments. The seat bottom 40 may have a number
of side or end regions 42 that either rest on or engage respec
user interface element is responsive to motion (e.g., a slider).
In this example, the user interface 50 includes a set of speed
selects 52 in an arrangement surrounding a motion ON/OFF
select 54. Actuation of the speed select 52 labeled “1” directs
the device 20 to drive the seat 22 (FIGS. 1-3) through a short
tive linear side segment of the support frame 26. A depending
region 44 (FIG. 3) of the seat base 40 is siZed to ?t Within the
opening 38 of the support frame 26. The other end of the base
range of motion and, accordingly, a loW speed. Progressively
higher speed select numbers increase the range of motion and
speed of the device 20, With the speed select 52 labeled “6”
support frame, the child seat 22 is securely held in place. In
this example, the seat support frame 26 is formed of tubular,
associated With the full range of motion of the device 20 and
40 has one or more aligned notches 46 that are con?gured to
receive the opposite linear side segment of the holder. The
depending region 44 and the notches 46 hold the child seat 22
the highest speed. Actuation of the motion ON/OFF select 54
either discontinues motion of the device 20 or activates the
device 20 at the last selected speed. In alternative embodi
ments, the select 54 may control the activation and deactiva
tion of the device 20 rather than only the motion aspects
in place on the holder. Gravity alone can be relied upon to
retain the seat in position. In another example, one or more
positive manual or automatic latches 48 (FIG. 2) can be
employed. In this example, the latches 48 are disposed as part
of the seat support frame 26. Alternatively or additionally, the
The manner in Which the user selects 52 and 54 are actuated
latches 48 may be formed as part of the seat 22, at one or both
ends of the seat 22, and/or at one or both ends of the seat
may vary considerably. In one embodiment, each user select
support frame 26 to securely hold the child seat 22 in place on
the seat support frame 26. The latches 48 can be spring biased
to automatically engage When the seat is placed on the holder.
the user selects 52, 54 are actuated via another mechanism,
52, 54 is a mechanically actuated button sWitch. Alternatively,
The geometry and symmetry of the latches 48 and, more
generally, the seat support frame 26, in this example alloWs
the seat 22 to be placed in the holder in multiple optional seat
orientations. In FIG. 1, the seat 22 is oriented such that a side
of the seat 22 is closest to the post. By de-coupling the seat 22
from the seat support frame 26, the seat 22 may be re-oriented
to the position shoWn in FIG. 3 such that the child is facing
aWay from the post 28. Further information regarding the seat
orientation options is set forth in the above-referenced pub
lication. As also discussed therein, the seat 22 and/or the seat
support frame 26 can also be con?gured to permit the incli
52 may be integrated as a slider interface instead of a set of
individual, binary sWitches. Further information regarding
orientations, and seat mounting con?gurations. For example,
respectively. A number of music tracks may be accessed via
repeated actuation of one of the selects 56, 58. OtherWise, the
music tracks are reproduced in turn and then begin again With
the ?rst track. If music is not desired, the reproduction of
soothing sounds is available via the actuation of a user select
in some cases, the seat frame 26 may be con?gured to accept
and support a seat or other child carrying device from another
product, such as a car seat.
With reference noW to FIG. 5, the operation and function
ality of the device 20 is described in connection With an
exemplary user interface indicated generally at 50. The user
interface 50 is disposed on the upper panel 37 as described
above, but the physical location and arrangement of any one
or more elements of the user interface 50 may vary consider
60. Repeated actuation of the select 60 toggles through a
number of soothing sounds, such as that of a stream, forest,
distant storm, or Womb. Reproduction of the selected sound
continues until a different sound is selected, a different user
select causes music playback, or the playback times out as
ably. Generally speaking, the user interface 50 includes a
number of elements that provide functions and operations for
selection by user. The user interface 50 also provides to the
integrated to any desired extent. For example, an element of
the user interface 50 may present both a user selection option
described beloW.
User select 62 supports the reproduction of music or other
sounds stored on, or provided by, a music playback device
(not shoWn), such as an MP3 player. Further control of music
playback, including in some cases volume control, may then
be directed via the music playback device. A compartment or
draWer 64 (FIG. 1) may include a tray for storage of the
playback device. A cable or other interface is then provided in
the compartment for connection of the playback device to the
device 20.
The user interface 50 also includes selects 66, 68 for vol
ume control upWard and doWnWard, respectively. Actuation
as Well as status information. To this end, a user interface
element may include a user select, or button, for actuation by
a caregiver, as Well as an output indicator, or light, the acti
vation of Which may occur With the selection thereof. Each of
device 20. Generally speaking, a caregiver may select the
reproduction of various types of sounds or music. In this
example, tWo different styles of music, playful and soothing,
nation of the seat 22 or the frame 26 to be adjusted to various
user information regarding the current selection or other
operational status of the device 20. The user selection and
status information aspects of the user interface 50 may be
the actuation and operation of capacitive sWitches or sensors
is set forth beloW.
The user interface 50 includes a set of selects generally
directed to controlling sound or music functionality of the
are available via the actuation of user selects 56 and 58,
recline angles. More generally, the disclosed devices and
methods are Well suited for use With a variety of seats, seat
such as a sensed capacitance. In other cases, the user selects
52, 54 may involve a combination of mechanical and capaci
tive actuation mechanisms. In still other cases, the user selects
of an ON/OFF select 70 either activates or deactivates the
reproduction or playback of music or sounds. Actuation of a
timer select 72 starts a device timer of a predetermined dura
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tion, such as 30 minutes, at the end of Which both sound
functions and motion functions are shut doWn. Lastly, the user
interface 50 includes a parental lock select 74 that may be
direction. The pin 104 is displaced from the rotational axis of
the gear folloWer 103 such that rotation of the gear folloWer
103 causes the pin orbolt 104 to proceed in a circular or rotary
actuated to either lock or unlock the user interface 50 via a
path. The free end of the pin 104 extends into a vertically
press-and-hold operation. In this manner, the device 20 may
oriented slot of a U-shaped or notched bracket 106 coupled to
the shaft 92. In this Way, the movement of the pin 104 along
the circular path is transformed from pure rotary motion into
the oscillating or reciprocating motion of the shaft 92. Despite
the single direction of the motor 100, the notched bracket 106
is displaced in one direction during one half of the cycle, and
be locked into any current operational state involving any one
or more device functions.
The layout and functionality of the user interface 50 may
vary considerably. For instance, the arrangement, shapes and
siZes of the user interface selects and other elements may
the opposite direction during the other half of the cycle. The
differ markedly from that shoWn in FIG. 5. Still further, any
number of the functions provided via the user interface selects
may be aggregated and addressed via, for instance, a touch
energy of the crank shaft transferred to the notched bracket
106 then acts on a sWing pivot shaft 107 via a spring (not
shoWn). The sWing pivot shaft 107 is then linked or coupled to
sensitive display screen or other panel that supports a variable
display. In these and other Ways, the same user select(s) may
be used to control disparate functions. For example, a touch
the drive shaft 92 to oscillate the support arm 30 through its
motion pattern.
sensitive slider element may support graduated or analog
adjustments for a variety of control options. Other user
The spring can act as a rotary dampening mechanism as
Well as an energy reservoir. The spring can be implemented to
function as a clutch-like element to protect the motor by
selects, such as buttons of either a conventional sWitch or
capacitive sensing nature may then be used to determine What
function is controlled by the slider element. For instance,
alloWing out-of-sync motion betWeen the motor 100 and the
shaft 92. Thus, the shaft 92 in this case is not directly con
nected to the motor 100 (i.e., an indirect drive mechanism). In
volume control, sWing motion speed, and timer functions
may be adjusted via one or more slider elements. The user
such cases, rotational displacement of the shaft 92 and, thus,
interface may then include a series of visual elements to
the travel of the support arm 30, may be limited by a bolt 108
projecting through the shaft 92. The bolt acts upon a physical
hard stop, such as part of the skeleton frame 86, to de?ne the
re?ect the degree to Which the slider element is actuated.
The functions and operations described above in connec
tion With the user interface 50 may be controlled or selected
maximum sWing angle.
individually or collectively. As described beloW, a set of func
tions may be grouped or associated such that user selection of
the group collectively activates, deactivates or otherWise con
trols multiple aspects of the device 20. The set of functions or
Practice of the disclosed devices and methods is not limited
to the above-described indirect drive technique, but rather
operations, together With the speci?c selections, thereby
nents of the drive system can vary considerably and yet fall
Within the spirit and scope of the present invention. The
de?ne an operational mode of the device 20. Operational
modes may be predetermined in various Ways. In some cases,
the mode(s) are de?ned and stored as factory settings. Alter
natively or additionally, the mode(s) are de?ned by a user and
FIG. 6 shoWs an exemplary support and drive assembly
indicated generally at 80. A number of components of the
assembly 80 may correspond With portions of the post 28
(FIGS. 1-4). HoWever, the assembly 80 is shoWn Without a
exemplary drive system 98 provides reciprocating motion
eton frame 86 that links the columns 82 to a drive system
indicated generally at 86. The frame 86 includes a number of
ribs 88 that structurally link a sleeve 90 surrounding a drive
shaft 92 to a retainer 94 that contains the columns 82 near
upper ends 96 thereof.
In this example, the shaft 92 is a tube-shaped rod connected
Within the assembly 80 to transfer motion from a drive system
indicated generally at 98 to the support arm 30. The shaft 92
is extends upWard from the drive system 98 at an angle rela
tive to the generally upright columns 82 to reach the support
arm 30 as the shaft 92 extends beyond the sleeve 90. In
operation, an electric motor 100 (e.g., a DC electric motor)
Well-suited for use in connection With a child motion device,
inasmuch as the drive mechanism and the mechanical linkage
thereof alloW for some amount of slippage in the coupling of
the motor to the occupant seat. Nonetheless, there are cer
tainly many other possible drive mechanisms or systems that
can alternatively be employed to impart the desired oscilla
tory or reciprocating motion to the support arm 30 of the
devices disclosed herein.
One such technique involves a direct drive mechanism in
cover or housing for convenience in illustration of the inner
Workings, or internal components, thereof. The assembly 80
is also shoWn Without components involved in the attachment
to the base section 24 (FIGS. 1-3), Which may vary consid
erably While providing structural support. In one example,
such structural connection components include a box-shaped
frame (not shoWn) that couples the base section 24 to the
assembly 80 by engaging both the base section 24 and a pair
of support columns 82. To this end, loWer ends 84 of each
column 82 may be captured by the frame. From that loWer
connection, the columns 82 extend upWardly toWard a skel
may alternatively involve any one of a number of different
motor drive schemes and techniques. As a result, the compo
Which the motor shaft is mechanically linked to the sWing
pivot shaft Without alloWing for any slippage. In this case, the
motor may be driven in different directions via sWitched
motor voltage polarity (i.e., forWard and reverse drive signals)
to achieve the reciprocating motion. The mechanical linkage
is then con?gured to accommodate the bi-directional motion,
unlike the Worm gear 102 and other mechanical linkage com
ponents in the drive system 98 described above, The motor
can be poWered in either an open-loop or closed-loop manner.
In an open-loop system, electrical 1 power is applied to the
motor With the alternating polarities such that sWing speed (or
sWing angle amplitude) may be controlled through adjusting
either applied voltage, current, frequency, or duty cycle. An
alternative system applies poWer at a ?xed polarity With the
reciprocating motion developed via mechanical linkage.
Closed-loop control of a direct drive system may involve
similar control techniques to those implemented in open-loop
control, albeit optimiZed via the feedback techniques
described beloW. With the feedback information, the applied
voltage and other parameters may be adjusted and optimiZed
to most e?iciently obtain or control to desired sWing ampli
drives a gear train having a Worm gear 102 and a Worm gear 65 tudes.
folloWer 103 carrying a pin or bolt 104, Which acts as a crank
shaft. In this case, the motor 100 alWays turns in the same
Other optional drive techniques may include or involve
spring-operated Wind-up mechanisms, magnetic systems,