TACTILE SENSORY DEVICE FOR USE BY A BABY OR CHILD

Abstract

There is provided a tactile sensory device for use by a baby or child. The tactile sensory device comprises a pulsation actuator configured to, in use, produce a mechanical vibration having a pulsatile waveform that is the same, or substantially the same as, a pulsatile waveform of blood flowing in an umbilical cord.

Claims

1. A tactile sensory device for use by a baby or child, the tactile sensory device comprising a pulsation actuator configured to, in use, produce a mechanical vibration having a pulsatile waveform that is the same, or substantially the same as, a pulsatile waveform of blood flowing in an umbilical cord.

2. A tactile sensory device according to claim 1 wherein the pulsatile waveform of blood flowing in an umbilical cord is a sawtooth, or substantially sawtooth, waveform.

3. A tactile sensory device according to claim 1 including a controller configured to, in use, generate an electrical signal to control the pulsation actuator to produce the mechanical vibration.

4. A tactile sensory device according to claim 3 wherein the controller includes a waveform generator configured to, in use, provide an electrical waveform signal to drive the pulsation actuator to produce the mechanical vibration.

5. (canceled)

6. A tactile sensory device according to claim 1 wherein the pulsation actuator includes a motor for producing the mechanical vibration.

7. A tactile sensory device according to claim 1 including a housing mechanically coupled to the pulsation actuator, wherein the pulsation actuator is contained inside the housing or is integral to the housing.

8. A tactile sensory device according to claim 7 wherein an outward-facing surface of the housing is shaped to be the same, or substantially the same, as an outward-facing surface of an umbilical cord.

9. A tactile sensory device according to claim 7 wherein an outward-facing surface of the housing is textured to be the same, or substantially the same, as an outward-facing surface of an umbilical cord.

10. A tactile sensory device according to claim 7 wherein the housing is made out of at least one of: silicone; rubber; polypropylene; a thermoplastic polymer; a sterile material; a sterilisable material; an antibacterial material; an antimicrobial material; a dishwasher-safe material; a microwave-safe material.

11. (canceled)

12. A tactile sensory device according to claim 7 wherein the housing is formed as a molded article.

13. A tactile sensory device according to claim 7 wherein an outward-facing surface of the housing is colored in: monochrome; black and white; or grayscale.

14. A tactile sensory device according to claim 7 wherein the housing is shaped as a partially or wholly annular housing.

15. A tactile sensory device according to claim 1 wherein the tactile sensory device is configured as a wearable device that is wearable by the baby or child.

16. A tactile sensory device according to claim 1 wherein the tactile sensory device is configured as a holdable or grippable device that is holdable or grippable by the baby or child.

17. (canceled)

18. A tactile sensory device according to claim 1 wherein the tactile sensory device is configured as an oral device that is placeable inside or against the baby's or child's mouth.

19. (canceled)

20. A tactile sensory device according to claim 18 wherein the oral device includes a mouthpiece, wherein the mouthpiece is arranged on a first side of the oral device and wherein the tactile sensory device further includes a switch for turning the pulsation actuator on and off, the switch being arranged to be operable from a second opposite side of the oral device.

21. A tactile sensory device according to claim 1 wherein the tactile sensory device is or forms part of: a garment; a fabric; a piece of furniture; an accessory; or a toy.

22. (canceled)

23. A tactile sensory device according to claim 1 including a power source for supplying power to the pulsation actuator, wherein the power source is removable and/or wherein the power source is rechargeable.

24. A tactile sensory device according to claim 1 including a power source for supplying power to the pulsation actuator, wherein the tactile sensory device includes a wireless coupler for electrically coupling the power source with an external wireless charger.

25. A method of manufacturing a tactile sensory device for use by a baby or child, the method comprising the steps of providing a pulsation actuator and configuring the pulsation actuator to produce a mechanical vibration having a pulsatile waveform that is the same, or substantially the same as, a pulsatile waveform of blood flowing in an umbilical cord.

Description

[0115] Preferred embodiments of the invention will now be described, by way of non-limiting embodiments, with reference to the accompanying drawings in which:

[0116] FIGS. 1 and 2 show a tactile sensory device according to a first embodiment of the invention;

[0117] FIG. 3 shows internal components of the tactile sensory device of FIG. 2;

[0118] FIGS. 4 and 5 show an induction charging feature of the tactile sensory device of FIG. 2;

[0119] FIG. 6 shows an exemplary pulsatile waveform of blood flowing in an umbilical cord;

[0120] FIG. 7 shows a tactile sensory device according to a second embodiment of the invention;

[0121] FIGS. 8 and 9 show internal components of the tactile sensory device of FIG. 7;

[0122] FIG. 10 shows an induction charging feature of the tactile sensory device of FIG. 7.

[0123] The figures are not necessarily to scale, and certain features and certain views of the figures may be shown exaggerated in scale or in schematic form in the interests of clarity and conciseness.

[0124] The following embodiments of the invention are described with reference to a tactile sensory grippable ring and a tactile sensory pacifier for use by a baby or child, but it will be appreciated that the following embodiments of the invention are applicable mutatis mutandis to other types of tactile sensory devices for use by a baby or child.

[0125] For ease of description, the following embodiments of the invention will be described with reference to their use by a new-born baby, but it would be understood that the following embodiments of the invention may be used by a toddler, infant or older child.

[0126] A tactile sensory device according to a first embodiment of the invention is shown in FIGS. 1 and 2 and is designated generally by the reference numeral 20.

[0127] The tactile sensory device 20 comprises a housing 22, a pulsation actuator, a controller and a power source.

[0128] The housing 22 is shaped as a ring that is grippable by a baby's hand. An outward-facing surface of the housing 22 includes a series of grooves 24 that are spaced apart about a circumference of the ring-shaped housing 22. Each groove is inclined relative to the circumferential axis of the housing 22.

[0129] The housing 22 is made out of silicone using a moulding process, e.g. an injection moulding process. Constructing the housing 22 out of silicone results in a housing 22 that is not only made out of a sterile material but also can be cleaned in a dishwasher and/or sterilised in a microwave prior to being used by the baby. Constructing the housing 22 out of silicone also allows the housing 22 to be sterilised using a sterilising cleaner, such submerging the housing 22 in a sterilising liquid (e.g. Milton® sterilising fluid). Constructing the housing 22 out of silicone allows the housing 22 to be configured to have antibacterial and/or antimicrobial properties. Constructing the housing 22 out of silicone also results in the outward-facing surface of the housing 22 having a gelatinous or spongy texture that resembles the outward-facing surface of an umbilical cord.

[0130] It is envisaged that, in other embodiments of the invention, the housing 22 may be made out of any other material such as rubber, polypropylene or a thermoplastic polymer.

[0131] The outward-facing surface of the housing 22 is coloured in black and white but in other embodiments may have a different colour scheme such as monochrome and grayscale. In the embodiment shown in FIG. 1, the outward-facing surface may be coloured to either include black stripes on a white background where the black stripes are arranged along the edges of the grooves, or include black spots on a white background. This may be used to provide the baby with a visual stimulus to aid their development, particularly in relation to hand and eye coordination and concentration. Other patterns may be applied to the outward-facing surface of the housing 22.

[0132] FIG. 3 shows internal components of the tactile sensory device 20.

[0133] The pulsation actuator includes a printed circuit board (PCB) 26 and a haptic motor 28 for producing a mechanical vibration. The motor 28 is mounted onto the PCB 26. The housing 22 comprises first and second housing portions that when assembled define a tubular housing 22 with an annular internal housing cavity. The PCB 26 is shaped as a ring and is dimensioned to fit inside the internal housing cavity.

[0134] When the rigid PCB 26 is contained inside the internal housing cavity, the PCB 26 and housing 22 are placed in direct physical contact so that they are mechanically coupled together. As a result, any mechanical vibration produced by the motor 28 causes the PCB 26 and therefore the housing 22 to also produce a mechanical vibration with identical or substantially identical characteristics.

[0135] The controller is mounted onto the PCB 26. The controller includes a microcontroller 30 that is capable of generating digital electrical waveform signals. The controller further includes a digital-to-analogue converter (DAC) that operably connects the microcontroller 30 to the motor 28. In use, the DAC receives an input digital electrical waveform signal from the microcontroller 30 and produces an output analogue electrical waveform signal that drives the motor 28 to produce a mechanical vibration.

[0136] A switch in the form of a push button 32 is mounted onto the PCB 26. In use, the push button 32 can be operated by squeezing a part of the silicone housing 22 that encapsulates the push button 32. Preferably the push button 32 and silicone housing 22 are configured to provide a measure of physical resistance to prevent the baby from accidentally operating the push button 32. For example, the push button 32 may include a spring that provides a biasing force that cannot be overcome by a mechanical force applied by a baby but can be readily overcome by a mechanical force applied by an adult, or the silicon housing may be configured to be rigid enough to resist a mechanical force applied by a baby but not rigid enough to resist a mechanical force applied by an adult. The location of the push button 32 inside the silicone housing 22 may be marked by adding a visual indicator 34 to the outward-facing surface of the housing 22 for easy identification. The operation of the button 32 may be used to selectively turn the pulsation actuator on and off.

[0137] The power source includes a rechargeable battery 36 for supplying power to the controller and motor 28. In the embodiment shown, the battery 36 is in the form of a pair of lithium-ion polymer batteries. The battery 36 is curved to follow the curved shape of the tactile sensory device 20. Other types of batteries may be used in place of the lithium-ion polymer batteries.

[0138] FIGS. 4 and 5 show an induction charging feature of the tactile sensory device 20. FIG. 5 also shows a user's finger just before it presses the visual indicator 34 on the outward-facing surface of the housing 22 which identifies the location of the push button 32.

[0139] The tactile sensory device 20 further includes an induction coil 38 that is configured to be electrically connected to the battery 36. The induction coil is mounted on the side of the PCB 26 that is opposite to the side of the PCB 26 that has the motor 28, microcontroller 30, push button 32 and battery 36. To charge the battery 36, the tactile sensory device 20 is placed on a pad of an induction charger 40 so that the induction coil 38 is electrically coupled with the induction charger 40 and thereby enables the induction charger 40 to supply electrical power to the battery 36. The induction charging process removes any potential interaction with exposed metal components and also avoids build-up of dirt and grime on the surface of the housing 22 caused by regular handling.

[0140] The configuration of the tactile sensory device 20 of FIGS. 1 and 2 therefore results in a baby-friendly grippable ring 20 with an outer shape and an outer texture that feels familiar to the baby. In addition, the encapsulation of the internal components inside the housing 22 not only protects the internal components from damage but also prevents the baby from freely accessing the internal components that could lead to harm to the baby.

[0141] The microcontroller 30 is programmed to control the motor 28 to produce a mechanical vibration that mimics the pulsation of the blood flow through the umbilical cord. In particular, the motor 28 is controlled to produce a mechanical vibration having a pulsatile waveform that is the same, or substantially the same as, a pulsatile waveform of blood flowing in an umbilical cord.

[0142] An umbilical cord of a full-term new-born baby is about 50 cm to about 70 cm long and about 2 cm in diameter.

[0143] The pulsatile waveform of blood flowing in an umbilical cord may be exemplarily measured and recorded using spectral Doppler velocimetry. The measurement is carried out during the pregnancy phase, and may preferably be carried out at different gestational ages throughout the pregnancy. This is because umbilical blood flow increases as the pregnancy progresses. Typical flow rates for blood flow through the umbilical cord is approximately 35 mL/min at 20 weeks of gestation, and 240 mL/min at 40 weeks of gestation. [Ref: Kiserud T, Acharya G (2004), “The fetal circulation”, Prenatal Diagnosis. 24 (13): 1049-59. doi:10.1002/pd.1062. PMID 15614842].

[0144] FIG. 6 shows an exemplary pulsatile waveform of blood flowing in an umbilical cord.

[0145] The pulsatile waveform of blood flowing in an umbilical cord corresponds to the variation of arterial blood flow velocity in the umbilical cord with time which typically has a sawtooth waveform shape. The variation in arterial blood flow velocity in an umbilical cord with time can be characterised by the following umbilical artery Doppler indices: the umbilical arterial systolic to diastolic ratio; the resistance index; and the pulsatility index. These indices gradually decline with gestational age due to an increase in diastolic flow with fetus maturity. [Reference: http://perinatology.com/calculators/umbilicalartery.htm].

[0146] The umbilical arterial systolic to diastolic ratio is equal to S/D, the resistance index is equal to (S−D)/S, and the pulsatility index is equal to (S−D)/Vm, where S=peak systolic velocity which is the maximum velocity during contraction of the fetal heart; D=end diastolic velocity which is the velocity of continuing forward flow in the umbilical artery during the relaxation phase of the heartbeat; and Vm=mean velocity of the arterial blood flow.

[0147] Exemplary reference ranges for the umbilical artery Doppler indices across a range of gestational ages for different percentiles are disclosed in Acharya G, Wilsgaard T, Berntsen G K, Maltau J M, Kiserud T, “Reference ranges for serial measurements of umbilical artery Doppler indices in the second half of pregnancy”, Am J Obstet Gynecol. 2005 March, 192(3):937-44.

[0148] The configuration of the tactile sensory device 20 of FIGS. 1 and 2 as a grippable ring 20 allows the baby to easily hold the tactile sensory device 20 in their hand in the same way a fetus inside the womb holds the umbilical cord in their hand. This in turn allows the baby to seek comfort through the mechanical vibration of the grippable ring 20, where the mechanical vibration is configured to have a pulsatile waveform that mimics the pulsation of blood flowing in the umbilical cord as detailed above.

[0149] By configuring the tactile sensory device 20 to mimic the pulsation of blood flowing in the umbilical cord, a familiar sensation is recreated for the baby that is comforting, soothing and stress-relieving. The tactile sensory device 20 may be provided to the baby shortly after birth or at a later time.

[0150] A tactile sensory device according to a second embodiment of the invention is shown in FIGS. 7 and 8 and is designated generally by the reference numeral 120. The tactile sensory device 120 of FIGS. 7 and 8 is similar in structure and operation to the tactile sensory device 20 of FIGS. 1 and 2 and like features share the same reference numerals.

[0151] The tactile sensory device 120 of FIGS. 7 and 8 differs from the tactile sensory device 20 of FIGS. 1 and 2 in that the tactile sensory device 120 of FIGS. 7 and 8 is configured as a pacifier 120 that is to be placed inside the baby's mouth. In particular, the pacifier 120 includes a teat 42 that is placed inside the baby's mouth in order to help locate the pacifier 120 against the baby's lips.

[0152] The housing 22 of the pacifier 120 comprises a base 44 and a sidewall 46. The sidewall 46 projects from the base 44 and extends about the circumference of the base 42 to define a receptacle 48. In the embodiment shown in FIGS. 7 and 8, the receptacle resembles a cup or bowl.

[0153] FIGS. 8 and 9 show internal components of the tactile sensory device 120.

[0154] Each of the motor 28, battery 36 and PCB 26 is shaped as a disc that has an outer diameter that corresponds to the inner diameter of the receptacle 48 of the housing 22. The PCB 26 is first fitted inside the receptacle 48, the battery 36 is placed on top of a first side of the PCB 26, and the motor 28 is placed on top of the battery 36. The teat 42 is placed on top of the battery 36 to encapsulate the PCB 26, battery 36 and motor 28 between the teat 42 and housing 22.

[0155] A switch in the form of a push button 32 is mounted on a second, opposite side of the PCB 26 so that applying a mechanical force onto the base 44 of the housing 22 transmits the mechanical force to the push button 32 contained inside the housing 22 in order to operate the switch. The operation of the button 32 may be used to selectively turn the pulsation actuator on and off. The location of the push button 32 inside the silicone housing 22 may be marked by adding a visual indicator 34 to an outward-facing surface of the base 44 of the housing 22 for easy identification.

[0156] FIG. 10 shows an induction charging feature of the tactile sensory device 120.

[0157] Similarly to the tactile sensory device 20 as shown in FIGS. 4 and 5, the tactile sensory device 120 further includes an induction coil 38 on the same side of the PCB 26 as the push button 32. To charge the battery 36, the tactile sensory device 120 is placed on a pad of an induction charger 40 so that the induction coil 38 is electrically coupled with the induction charger 40 and thereby enables the induction charger 40 to supply electrical power to the battery 36.

[0158] The configuration of the tactile sensory device 210 of FIGS. 7 and 8 therefore results in a pacifier 120 that can be easily used by a baby. In addition, the encapsulation of the internal components between the teat 42 and housing 22 not only protects the internal components from damage but also prevents the baby from freely accessing the internal components that could lead to harm to the baby.

[0159] The configuration of the tactile sensory device 120 of FIGS. 7 and 8 as a pacifier 120 allows the baby to easily hold the tactile sensory device 120 against their lips and in their mouth in the same way a fetus inside the womb holds the umbilical cord against their lips and/or sucks on part of the umbilical cord. This in turn allows the baby to seek comfort through the mechanical vibration of the pacifier 120 against their lips and in their mouth, where the mechanical vibration is configured to have a pulsatile waveform that mimics the pulsation of blood flowing in the umbilical cord. Details of the pulsatile waveform of blood flowing in the umbilical cord is the same as described above with reference to the tactile sensory device 20 of FIGS. 1 and 2.

[0160] Examples of other optional and alternative features of the above embodiments are described as follows.

[0161] Optionally the microcontroller may be a programmable controller. Configuring the microcontroller as a programmable controller allows the tactile sensory device to produce a range of mechanical vibrations through reprogramming of the controller. For example, the controller may be programmed to: [0162] use a pulsatile waveform chosen from a selection of pulsatile waveforms of blood flowing in an umbilical cord at different gestational ages; [0163] control the pulsation actuator to stop the mechanical vibration after a specific time period has lapsed; [0164] control the pulsation actuator to periodically produce the mechanical vibration at regular intervals of time.

[0165] It will be appreciated that the tactile sensory device of the invention may be alternatively configured to be or form part of another type of oral device, a garment, a fabric, a piece of furniture, an accessory or a toy, non-limiting examples of which are described throughout the specification. Also, configuring the tactile sensory device as a wearable device that is wearable by the baby not only ensures that the tactile sensory device can be accurately placed on a desired location on the baby's body but also stays on the baby's body regardless of movement.

[0166] Optionally the battery may be configured to be removable from the tactile sensory device.

[0167] Further optionally the tactile sensory device may omit the power source and may be configured to be connectable to an external power source.

[0168] It is envisaged that, in other embodiments of the invention, the controller may be a hardwired controller. It is also envisaged that, in still other embodiments of the invention, the tactile sensory device may be configured to work with an external controller.

[0169] It is envisaged that, in other embodiments of the invention, the PCB may be excluded or may be replaced by other types of electrical connectors and/or support structures.

[0170] It will be appreciated that the numerical values given for the embodiments shown are merely chosen to help illustrate the working of the invention and may be replaced by other numerical values.

[0171] Preferences and options for a given aspect, feature or parameter of the invention should, unless the context indicates otherwise, be regarded as having been disclosed in combination with any and all preferences and options for all other aspects, features and parameters of the invention.

[0172] The listing or discussion of an apparently prior published document in this specification should not necessarily be taken as an acknowledgement that the document is part of the state of the art or is common general knowledge.