Infant soothing device and method

Abstract

A device to assuage distressed infants via an adjustable vertical motion combined with an adjustable orientation. The device has a frame, an infant resting member coupled to the frame that is capable of retaining an infant in an adjustable position and a mechanism that is capable of moving the infant resting member in a vertical motion to soothe the infant.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a caregiver holding an infant in a prior art manner;

FIG. 2 is an embodiment of an infant soothing device with a motor drive; and

FIG. 3 is an embodiment of an infant soothing device with a resonant drive.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

FIG. 1 shows the common sight of a caregiver holding an infant. In this depiction, the child is held in a face-in orientation as the caregiver gently bounces the child up and down. This motion will be quite tiring for the caregiver if needed for long periods. To reduce arm strain, products such as the Baby Bjorn® or other “frontpacks” may be used to hold the infant. However, products of this type tend to strain the back of the caregiver. To facilitate bouncing motions, a caregiver may sit on a large inflated ball. This activity requires balance and caution as the ball is liable to roll causing the caregiver and child to fall. This vertical position coupled with vertical motion is often the only way to calm a crying infant. The invention provides a device that holds the infant in one or more orientations and vertically moves the infant to soothe the infant without the caregiver having to hold and bounce the infant.

FIG. 2 shows one embodiment of an infant soothing device in accordance with the invention. The device has an infant resting member 20 that is fitted to an upper frame 21. In the preferred embodiment, the infant resting member is shaped like a human torso. The upper frame 21 is pivotally attached to a lower frame 22 through a pivot 23. The torso 20 is pivoted on the upper frame 21 by a hinge 24 to adjust the angle of the torso (and therefore the infant) relative to the upper frame 21 and the torso 20 is maintained at the angle by a parallel member 25. When an infant is secured to the torso, the upper frame or torso may be directly pushed up and down resulting in a vertical motion of the infant. The device optionally may include a counter weight or counter spring. The vertical motion is easier if such a counter weight or counter spring is provided. The driving force for the bouncing may be provided directly by the care giver which greatly reduces the strain on the caregiver or it may be provided by an automated mechanism.

In a preferred embodiment, an actuator or motor 26 is fitted to the lower frame 22. A crank 27 connects the actuator to the upper frame 21 through a link 28. A constant rotational motion of the actuator results in a roughly sinusoidal angular motion of the upper frame 21. This results in a roughly sinusoidal vertical motion of the torso. The actuator may be a DC motor, an AC motor, a wind-up mechanism, falling weight, or other mechanisms to impart a sinusoidal vertical motion as will be clear to one skilled in the art. Thus, in this preferred embodiment, an approximation of the vertical position and vertical bouncing motion of a caregiver are achieved.

In a preferred embodiment, the torso is a female form although the infant resting member may have a variety of different forms that are within the scope of the invention. For example, the infant resting member may not resemble a torso in appearance since other shapes may be selected to hold the infant firmly. The infant resting member may also be transformable from one shape to another. For example, inflatable structures 40 may be particularly well suited for some embodiments. The inflatable elements 40 may be used to support parts of the infant such as, but not limited to, a neck support, arm supports and leg supports. Inflatable elements may be deployed to retain the infant with a gentle clamping action. Inflation and deflation of large elements may be used to effect a change in angle of the infant resting member.

The infant resting member is preferably made of compliant materials to simulate a mother's skin softness, texture and temperature. It will be beneficial to make the surface of the infant resting member easily cleanable or replaceable or provide a removable cover for the infant resting member. The replacement “skins” or removable cover may have different properties that may include but are not limited to a range of softness, different skin colors, skin textures, body shape, and gender. The infant resting member may also have an adjustable shape wherein the shape can be adjusted by any inflation mechanisms or other mechanisms/methods known to those skilled in the art.

The infant resting member 20 optionally may include a heating element/device on or under the surface of the infant resting member. The heating element may be a hot water mechanism or an electrical mechanism as will be clear to one skilled in the art that maintains the portion of the infant resting surface on which the infant rests at a particular temperature, such as the typical body temperature of the mother of the infant. In a preferred embodiment, a newborn temperature monitor may be used to control the temperature of the heating element.

Many caregivers use an over the shoulder infant carrier as in FIG. 1. This same carrier may be attached to the infant resting member 20 as shown in FIG. 2 wherein the carrier may be fitted to support the infant oriented facing the infant resting member or away from the infant resting member. The device or the carrier used with the device may include a safety mechanism to facilitate placing the infant into the carrier and removing the infant. For example, the safety mechanism may securely attach the carrier to the device by, for example, ensuring that the carrier does not slide off the shoulders of the infant resting member when the infant resting member is the torso shape shown in FIG. 2. The safety mechanism may also include a mechanism to hold the infant carrier down while removing the infant from the device wherein the mechanism may include hooks, buttons, hook and loop fasteners, or other devices/mechanisms as would be known to those skilled in the art. The safety mechanism may further include features that permit the infant to spend extended time in the device without discomfort. For example, the features may include a saddle like features to support the infant's bottom, stirrups to support the legs or feet or a member that becomes blanket-like when the infant is removed.

The angle of the infant resting member 20 (and therefore the infant resting on the infant resting member) relative to the upper frame 21 and also relative to an angle perpendicular to the ground may be adjustable. The angle is adjusted by adjusting the length of parallel member 25. Alternatively, inflatable structures may be used to set the angle. The device may further include additional hinge means as will be obvious to one skilled in the art. The device may also include a mechanism that allows continuous motion transitioning the infant from vertical to horizontal in a smooth motion to a new angle. Thus, once the infant is calmed, the angle may be adjusted all the way to a horizontal sleeping position.

Other embodiments of the device may employ sliding mechanisms for the vertical motion. Sliding mechanisms may be more compact and more suitable for other mounting mechanisms. For example, the sliding mechanism may be mounted to the end of a standard crib and mounting mechanisms 42 may be provided for a wide variety of crib sizes and types as well as other objects such as changing tables, walls, tables, chairs and the like. Mounting means may include but are not limited to clamps, hooks, and straps. A free standing embodiment of the device may include wheels for easy transport within the home or in a hospital ward. A wide range of amplitudes may be accommodated by sliding vertical configurations. The sliding range could span from close the floor, minimizing tipping, to a standing position which may be more convenient for the care giver.

In FIG. 2, an exemplary type of oscillatory motion is provided by a motor 26, the crank 27 and the link 28. The frequency of the oscillatory motion is readily controlled by the speed of the motor. The amplitude of the motion is readily adjusted by adjusting the length of the crank 27. Alternatively, the amplitude may also be adjusted by changing the position of the attachment of the link 28 to the upper frame 21. As stated earlier, the motion of the device in FIG. 2 is roughly sinusoidal, although selection of the exact lengths of the components will modify the motion profile. As an alternative, a cam (not shown) may be used to replace the crank and link to provide a wide variety of motions of a fixed character and then the cam could be replaced to change the character and magnitude of the motion. As another alternative, an adjustable follower could change the amplitude and select from a few different profiles using a single cam assembly.

In the embodiment shown in FIG. 2, the motor 26 may be a DC servo type motor that may be programmed to produce any torque profile desired within the limits of the motor chosen. To closely match the actual motion of the caregiver when the caregiver is holding and bouncing the infant, a small recording accelerometer is attached to the caregiver in order to capture the precise motion of the caregiver while performing the soothing bouncing motion. Then, this motion can be reproduced by the DC servo motor. In accordance with the invention, even vibrations and stuttering motions of the caregiver may be replicated by a servo motor or using a separate vibration motor.

The device may include a counterbalance weight or a spring (not shown) to reduce the torque ripple demanded by the motor which will reduce the size and power dissipation of the motor greatly. A spring may also be used to make the moving body oscillate with a resonant frequency. The resonant frequency for a particular geometry is determined by the mass of the infant and the spring constant of the spring. Changing the spring constant or changing the geometry will yield a wide range of resonant frequencies.

FIG. 3 illustrates a preferred embodiment of the device. This device has the same infant resting member 20 and the parallel member 25 arranged to provide vertical motion. While similar in function to the upper frame 21 and the lower frame 22 in FIG. 2, this device has an upper frame 35 and a lower frame 36 with a slightly different design. In particular, the device may include a sizeable spring 30 to support the weight of the infant wherein the spring 30 is connected to the upper frame 35 as shown. The extension of the spring may be adjusted by a knob 31 to set the average position of the upper frame 35. The knob position or spring position may be labeled accordingly as a weight setting for the infant. This configuration provides a resonant vertical motion. The resonant frequency is determined by the mass of the infant, the spring constant and geometry wherein the frequency may be adjusted by altering the geometry or changing the spring. A locking mechanism may be included to fix the mechanism in a rigid state.

The device in FIG. 3 may include a small motor and gear box 32 mounted to the upper frame 35. The output shaft is coupled to the lower frame 36 by a compliant member 33. If the motor is run with alternating direction at the resonant frequency of the spring mass system, then the vertical motion will quickly increase to mechanical limits. The power required to achieve large excursions is substantially less than for a crank or cam system.

A shaft encoder 34 may be provided which can detect the angle between the upper frame 35 and lower frame 36. The encoder 34 may be a potentiometer or an absolute or incremental digital encoder. Alternatively, back electro motive force (EMF) from the motor may be readily sensed and used as the encoder. A micro controller is ideally suited to monitor an encoder, control the motor and provide an interface to the user. The encoder may be used to set the limits of motion of the vertical motion. In the case of a potentiometer (or an absolute digital encoder), the readings at each end of travel may be recorded. For an incremental encoder, the software will need to infer the stop positions from a first “crash” against the end stops. The encoder may also be used to establish the resonant drive required. This may be as simple as differentiating the position and driving the motor in the direction of motion. The amplitude of the motion is readily monitored by looking at the angular travel of the encoder. Under software control, the magnitude of the oscillation may be limited to suit the user. Timing functions are also readily handled by the micro controller. In the device in FIG. 3, the resonant frequency is fixed so that the micro controller cannot change the frequency through control of the small motor. A manual or motorized mechanism for adjusting the spring geometry may be used to add frequency control for the device.

In accordance with the invention, the device may include a printed circuit board with an appropriate micro controller, motor drive chips, display and user interface buttons. Furthermore, additional features may be readily included. These features may include but are not limited to a timer functions, sound activation, sound output and connection to other devices. The timing functions may include a count down timer, delayed start timer, a repeating interval timer, and other features clear to one skilled in the art.

While the foregoing has been with reference to particular embodiments of the invention, it will be appreciated by those skilled in the art that changes in these embodiments may be made without departing from the principles and spirit of the invention.

Claims

1. A device for soothing an infant, comprising: a frame;an infant resting member coupled to the frame that is capable of retaining an infant in an adjustable position with its feet substantially below its head;a mechanism that is capable of moving the infant resting member in a vertical motion to soothe the infant; anda mechanism that holds the infant against the infant resting member during the vertical motion.

2. The device of claim 1, wherein an orientation of the infant resting member is adjustable from a substantially vertical orientation to one or more other orientations.

3. The device of claim 2, wherein the orientation of the infant resting member is adjustable from a vertical position to a horizontal position so that the infant can sleep on the infant resting member.

4. The device of claim 1, wherein said infant resting member further comprises one or more inflatable elements that secure and position the infant.

5. The device of claim 1, wherein the infant resting member further comprises a torso shaped form and a mechanism that holds the infant against the torso shaped form.

6. The device of claim 5, wherein the mechanism that holds the infant further comprises an infant holder secured to the torso shaped form.

7. The device of claim 5, wherein the torso shaped form has an adjustable shape.

8. The device of claim 1, wherein the mechanism further comprises an actuator that moves the frame and the infant resting member.

9. The device of claim 8, wherein the actuator moves the frame and the infant resting member in a selectable motion.

10. The device of claim 8, wherein the actuator is an electric motor.

11. The device of claim 1, wherein the frame further comprises a lower frame, an upper frame pivotally attached to the lower frame and a mechanism for holding the infant resting member in a substantially vertical orientation.

12. The device of claim 11, wherein the upper frame is counter supported by a counter balance.

13. The device of claim 12, wherein the vertical motion further comprises a resonant vertical motion.

14. The device of claim 13 wherein the resonant motion is driven by an actuator.

15. The device of claim 1 further comprising a mounting means to secure the mechanism to another structure.

16. A device for soothing an infant, comprising: an infant resting member that is capable of holding an infant;a mechanism for moving the infant resting member in a substantially vertical motion, andwherein the infant resting member has an orientation that is adjustable from a substantially vertical orientation with the infant in a position with its feet substantially below its head to one or more other orientations.

17. The device of claim 16, wherein the moving mechanism further comprises a motor that moves the infant resting member.

18. The device of claim 16, wherein the moving mechanism further comprises a counter balance that counter supports the infant resting member.

19. The device of claim 18, wherein the vertical motion is a vertical resonant motion.

20. (canceled)