System and method for controlling a motorized tapping motion - Patents.com

Abstract

A system and method for generating a sweeping and / or tapping motion in an oral cleaning device, such as a powered toothbrush device, that optimally performs in all target areas of a user's mouth. The system and method are configured to periodically move a drive train shaft in a first direction about a central axis of the device or along a line tangential to a cleaning unit of the device, and periodically drive the drive train shaft in a second direction different from the first direction, such that a set of cleaning elements attached to the cleaning unit move in a vertical up-down motion. The system and method are further configured to dynamically modify the output of the drive train assembly to target different areas of the user's mouth.

Description

[Technical field]

[0001]

[0001] The present disclosure is generally directed to oral cleaning devices and systems for generating controllable sweeping and powered tapping motions that achieve high performance cleaning results. [Background technology]

[0002]

[0002] Current modern oral cleaning devices use a rotational motion around the central axis of the brush head. This motion is known as a sweeping motion. A simplified schematic representation of a modern oral cleaning device such as an electric toothbrush is illustrated in FIG. 1. As illustrated in FIG. 1, the electric toothbrush 10 has a handle 12 and a brush head 14. Bristles 16 are illustrated extending from the brush head 14. In use, the brush head 14 is driven by a drive system housed in the handle 12. The bristles are typically rotated by the drive system in a sweeping motion SM around the central axis A. The sweeping motion is typically embodied as a linear movement, a rotational movement, or a combination of both linear and rotational movements, which is tangential to the direction in which the bristles face.

[0003]

[0003] Unfortunately, toothbrush devices that use only sweeping motion are not optimized for all target areas in the mouth (e.g., interproximal area, gum line area, incisor surface, molar surface, and overall surface area of ​​teeth). Achieving proper cleaning performance in all target areas depends on several factors, such as toothbrush layout, toothbrush motion, and user handling. Although manufacturers can control the layout or design of toothbrushes, it is difficult to design toothbrushes that perform optimally in all target areas due to conflicting requirements for different areas. As a result, toothbrushes may have suboptimal performance in certain areas of interest. Ideally, consumers can use different types of toothbrushes to achieve the best cleaning in all target areas, but for daily oral care routines, consumers use only one toothbrush device. Summary of the Invention [Problem to be solved by the invention]

[0004]

[0004] Thus, there is a need in the art for improved oral cleaning devices and systems that achieve the goals of stain and / or plaque removal and gum health. There is also a need in the art for improved oral cleaning devices and systems that optimize different drive train motions to target specific areas of the mouth. [Means for solving the problem]

[0005]

[0005] The present disclosure is generally directed to an inventive drive train assembly that may be applied to an electric or powered oral cleaning device, such as an electric toothbrush. The inventive system achieves the goal of improved stain and / or plaque removal and gum health by precisely and controllably generating a powered tapping motion, alone or in combination with a sweeping motion. Various embodiments and implementations herein are directed to an improved drive train assembly that utilizes an electromagnetic assembly having multiple conductors configured to periodically rotate a drive train shaft in a first direction about a central axis of the device and periodically drive the drive train shaft in a second direction different from the first direction, such that a set of cleaning elements attached to the cleaning unit moves in a vertical up and down motion (i.e., a tapping motion). Applicant has recognized and appreciated that the combination of a sweeping motion and a tapping motion is beneficial for certain areas of the mouth, and further, for certain other areas, such as the gum line area, it is advantageous to stop the sweeping motion and replace it with only a tapping motion.

[0006]

[0006] In one aspect, an oral cleaning device is provided. The oral cleaning device includes a cleaning unit having a set of cleaning elements; a body portion coupled to the cleaning unit; and a drive train assembly disposed in the body portion, the drive train assembly comprising: a drive train shaft at least partially accommodated in the body portion and configured to engage with the cleaning unit; and (i) an electromagnetic assembly configured to periodically drive the drive train shaft, thereby periodically drive the cleaning unit in a first direction around or along a first axis of the oral cleaning device, and (ii) an electromagnetic assembly configured to periodically drive the drive train shaft, thereby periodically drive the cleaning unit in a second direction around or along a second axis of the oral cleaning device, the second direction being different from the first direction and the second axis being perpendicular to the first axis.

[0007]

[0007] According to an embodiment, the set of cleaning elements is configured to move in a first direction or a second direction with an amplitude greater than 0.5 mm and less than 3 mm and a frequency greater than 0.25 Hz and less than 520 Hz.

[0008]

[0008] According to an embodiment, the first axis is a central axis (A) of the oral cleaning device.

[0009]

[0009] According to an embodiment, the electromagnetic assembly is configured to discontinue periodic driving of the drive train shaft in the first direction while continuing periodic driving of the drive train shaft in the second direction; or the electromagnetic assembly is configured to discontinue periodic driving of the drive train shaft in the second direction while continuing periodic driving of the drive train shaft in the first direction.

[0010]

[0010] According to an embodiment, the main body portion further includes an input operable by a user to select a mode of operation, whereby selecting the mode of operation causes the electromagnetic assembly to (i) discontinue cyclic driving of the drive train shaft in the first direction and continue cyclic driving of the drive train shaft in the second direction, or (ii) discontinue cyclic driving of the drive train shaft in the second direction and continue cyclic driving of the drive train shaft in the first direction.

[0011]

[0011] According to an embodiment, the oral cleaning device further includes a sensor configured to detect angle information at which the set of cleaning elements are positioned relative to one or more teeth or gum surfaces of a user's mouth; and a processor, the processor is configured to receive the detected angle information from the sensor; determine that the set of cleaning elements are in proximity to a cleaning area of ​​the user's mouth based on the received detected angle information; and select a mode of operation of the electromagnetic assembly in which the drive train shaft is cyclically driven only in a first direction or only in a second direction.

[0012]

[0012] According to an embodiment, the cleaning area is the gum line area or the interdental area.

[0013]

[0013] According to an embodiment, the oral cleaning device further includes: a resonator connected to a drive train shaft, the resonator configured to rotate about a first axis; an elastic member having a first end, a second end and a pivot point, the elastic member connected to the resonator at its first end; and a magnet connected to the second end of the elastic member, the electromagnetic assembly further comprising first and second conductors configured to interact with the magnet to periodically drive the drive train shaft, thereby periodically driving the cleaning unit around the first axis or in a first direction along the first axis.

[0014]

[0014] According to an embodiment, the electromagnetic assembly further includes third and fourth conductors arranged parallel to the first and second conductors, the third and fourth conductors configured to interact with the magnet to periodically drive the drive train shaft, thereby periodically driving the cleaning unit around the second axis or in a second direction along the second axis.

[0015]

[0015] In another aspect, a drive train assembly for an oral cleaning device is provided. The drive train assembly includes: a drive train shaft at least partially housed within the body portion and configured to engage a cleaning unit having a set of cleaning elements; a resonator connected to the drive train shaft, the resonator configured to rotate about a first axis of the oral cleaning device; an elastic member having a first end, a second end, and a pivot point, the elastic member connected at its first end to the resonator; a magnet connected to the second end of the elastic member; and a drive train shaft for periodically driving the drive train shaft, thereby rotating the cleaning unit. and an electromagnetic assembly comprising first and second conductors configured to interact with a magnet to periodically drive the knit in a first direction around or along a first axis of the oral cleaning device, the electromagnetic assembly further comprising third and fourth conductors configured to interact with the magnet to periodically drive the drive train shaft, thereby periodically driving the cleaning unit in a second direction around or along a second axis of the oral cleaning device, the second direction being different from the first direction and the second axis being perpendicular to the first axis.

[0016]

[0016] According to an embodiment, the set of cleaning elements is configured to move in the second direction with an amplitude greater than 0.5 mm and less than 3 mm and a frequency greater than 0.25 Hz and less than 520 Hz.

[0017]

[0017] According to an embodiment, the electromagnetic assembly is configured to discontinue periodic driving of the drive train shaft in the first direction while continuing periodic driving of the drive train shaft in the second direction; or the electromagnetic assembly is configured to discontinue periodic driving of the drive train shaft in the second direction while continuing periodic driving of the drive train shaft in the first direction.

[0018]

[0018] According to an embodiment, the electromagnetic assembly is configured to cease periodic driving of the drive train shaft in the first direction in response to a user input received at an input in the body portion of the oral cleaning device.

[0019]

[0019] According to an embodiment, the electromagnetic assembly is configured to discontinue periodic driving of the drive train shaft in a first direction or a second direction in response to a sensor signal received from the sensor, the sensor signal indicating angular information at which the set of cleaning elements is positioned relative to one or more tooth or gum surfaces.

[0020] According to an embodiment, the electromagnetic assembly is configured to cease cyclically driving the drive train shaft in either the first or second direction after a particular amount of time has elapsed during the cleaning routine.

[0021] In various embodiments, the processor or controller is associated with one or more storage media (collectively referred to herein as "memory" and including, for example, volatile and non-volatile computer memory such as RAM, PROM, EPROM, EEPROM, floppy disks, compact disks, optical disks, magnetic tapes, etc.). In some embodiments, the storage media is encoded with one or more programs that, when executed on one or more processors and / or controllers, perform at least some of the functions discussed herein. The various storage media may be fixed or portable within the processor or controller, and one or more programs stored on the storage media may be loaded into the processor or controller to implement various aspects discussed herein. In this specification, the term "program" or "computer program" is used in a general sense to refer to any type of computer code (e.g., software or microcode) that may be used to program one or more processors or controllers.

[0022]

[0022] It should be understood that all combinations of the foregoing concepts and additional concepts discussed in more detail below (provided that such concepts are not mutually inconsistent) are considered to be part of the inventive subject matter disclosed herein. In particular, all combinations of the claimed subject matter described at the end of this disclosure are considered to be part of the inventive subject matter disclosed herein. It should also be understood that the terms explicitly used in this specification, as well as those described in any disclosures incorporated by reference, are accorded the meaning most consistent with the particular concepts disclosed herein.

[0023]

[0023] These and other aspects of the various embodiments will be apparent from and elucidated with reference to the embodiments described hereinafter.

[0024]

[0024] In the drawings, like reference characters generally refer to the same parts throughout the different views. Also, the drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of various embodiments. [Brief description of the drawings]

[0025] [Figure 1]

[0025] A simplified schematic representation of a modern oral cleaning device that uses a sweeping motion. [Diagram 2]

[0026] 1 is a simplified schematic representation of a portion of an oral cleaning device using a tapping motion according to an embodiment of the present disclosure. [Diagram 3]

[0027] A simplified schematic representation of an end view of an oral cleaning device configured to use sweeping and tapping motions according to an aspect of the present disclosure. [Figure 4]

[0028] A diagrammatic representation of important parameters of frequency and amplitude for an oral cleaning device using a periodic pulsing (i.e., tapping) motion according to an embodiment of the present disclosure. [Diagram 5]

[0029] 1 is a graphical representation of exemplary sweep and tapping amplitudes according to an aspect of the present disclosure. [Figure 6]

[0030] 1 is a schematic representation of an oral cleaning device according to an embodiment of the present disclosure. [Figure 7]

[0031] A schematic representation of a portion of a drive train assembly of an oral cleaning device configured to use a sweeping motion in accordance with an aspect of the present disclosure. [Figure 8]

[0032] A schematic representation of a portion of a drive train assembly of an oral cleaning device configured to use sweeping and tapping motions together and separately in accordance with an aspect of the present disclosure. [Figure 9]

[0033] 9 is a schematic representation of magnets and conductors of a portion of the drive train assembly illustrated in FIG. 8 according to an embodiment of the present disclosure. [Figure 10]

[0034] 1 is a flow chart illustrating a method of operating an oral cleaning device, such as a power toothbrush device, according to an aspect of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026]

[0035] The present disclosure describes various embodiments of an improved system for driving the brush head of an electric or powered oral cleaning device, such as an electric toothbrush or shaver. Applicant has recognized and understood that an oral cleaning device can provide improved cleaning performance in critical areas of a user's mouth by dynamically modifying the output of the drive train assembly of the device. The drive train assembly can be driven to move the cleaning elements (i.e., bristles) of the device in a vertical periodic motion parallel to the direction of the cleaning elements, the amplitude of the vertical motion being equal to or greater than 0.25 mm (referred to herein as "powered tapping"). As used herein, the term "vertical" does not mean an absolute direction relative to the ground, but is instead used to indicate the relative direction of the motion shown in the drawings. In certain areas of the mouth, the drive train assembly can also be driven to move the cleaning elements in a vertical motion in combination with a periodic rotational sweep motion around the central axis of the device. As described herein, the inventive powered tapping motion in an oral cleaning device (i) achieves deeper reach into the gum pocket to remove subgingival plaque, (ii) achieves higher peak force at the surface for improved plaque and / or stain removal, (iii) improves plaque removal by preventing pinning of the bristle tufts and restoring beneficial tuft sweeping action, (iv) achieves greater resilience to variability in use such as toothbrush placement, toothbrush angle, toothbrush pressure, and (v) offers new options for consumer experience modes. Thus, the improved system described or otherwise contemplated herein provides an oral cleaning device having a drive train assembly that precisely controls a powered tapping motion in conjunction with or separate from a precisely controlled sweeping movement. The improved drive train assembly includes an electromagnetic assembly configured to (i) drive a drive train shaft and a cleaning unit having cleaning elements in a first direction about a central axis of the device, and (ii) drive the drive train shaft and the cleaning unit and cleaning elements in a second direction different from the first direction, such that the cleaning elements move in a vertical up and down motion (i.e., a tapping or pulsing motion).A combination of movements (i.e., sweeping and tapping movements) can be beneficial for plaque removal in some areas of the mouth, while in certain other areas of the mouth (i.e., the gum line area), it is advantageous to replace the sweeping movement with just a tapping movement.

[0027]

[0036] A particular goal of the use of the embodiments and implementations herein is to provide a mechanism for providing a powered tapping motion in an oral cleaning device, such as a Philips Sonicare™ electric toothbrush (manufactured by Koninklijke Philips NV). However, the components of the device are utilized with many other personal care devices, such as oral care devices, oral cleaning devices, flossers, skin cleaners, and many other devices. The present disclosure should not be limited by the specific embodiments shown and described.

[0028]

[0037] As illustrated in FIG. 2, a simplified schematic representation of a portion of an oral cleaning device 100, e.g., an electric toothbrush device, configured to generate a sweeping motion and / or a tapping motion is provided. The oral cleaning device 100 comprises a cleaning unit 104, e.g., a brush head 114, and a cleaning element 116, e.g., bristles, which can be driven to rotate around a central axis A and to pulse or tap in a direction RD2. The directions provided in FIG. 2 are included to illustrate the spatial terms used in the technical field and in this application. As used herein, the term "vertical" refers to the indicated direction. The axial direction AD is parallel to the central axis A and extends along the y-axis of the device 100. The radial direction RD1 is perpendicular to the central axis A and the radial direction RD2 and extends along the x-axis of the device 100. The radial direction RD2 is perpendicular to both the axial direction AD and the radial direction RD1, parallel to the axis of the cleaning element 116 shown, and extends along the z-axis of the device 100. The powered tapping motion described herein refers to the controllable movement of the cleaning units and / or cleaning elements in the radial direction RD2. In other words, the powered tapping motion refers to the movement of the cleaning elements parallel to the axis of alignment of the cleaning elements. The sweeping motion refers to the rotational and / or linear motion of the cleaning elements perpendicular to the axis of alignment of the cleaning elements. In an embodiment, the powered tapping motion refers to the controllable movement of the cleaning units and / or cleaning elements in the radial direction RD2 by rotating the drive train shaft around an axis extending in the radial direction RD1 (i.e. around the x-axis of the device).

[0029]

[0038] Referring to FIG. 3, a schematic representation of an end view of the oral cleaning device 100 is provided. As will be discussed in more detail herein, the oral cleaning device 100 can be configured to start and stop sweeping and / or tapping movements (SM and TM) to optimize movement to a particular area where the particular movement is most beneficial. In some cases, the particular movement includes only sweeping or only tapping. In other cases, the particular movement includes some combination of sweeping and tapping. The combination of sweeping and tapping movements refers to the addition (i.e., cumulative action, movement, or effect) of the sweep or stroke and the pulse or tap. The sweep or stroke is directed in a direction SM (which is the direction between the occlusal surface, i.e., the chewing surface, and the gum line when the toothbrush is held with the tips of the bristles facing the buccal side of the teeth). The pulse or tap is directed in a vertical direction TM (which is the tongue-to-facial direction when the toothbrush is held with the tips of the bristles facing the buccal side of the teeth). In an embodiment, the toothbrush is held so that the tips of the bristles are facing the teeth at a 45 degree angle. As used herein, a tapping motion is defined as a vertical periodic movement (i.e., in the direction TM) with an amplitude equal to or greater than 0.25 mm. In an embodiment, a tapping motion alone may be used for the lower anterior tongue area of ​​the mouth. A small powered tapping motion (i.e., a tapping motion with an amplitude on the smaller side of the critical range described herein) may be used for the anterior cheek area of ​​the mouth with a sweeping motion. Alternatively, a sweeping motion alone may be used for the anterior cheek area of ​​the mouth. A large powered tapping motion (i.e., a tapping motion with an amplitude higher than the critical range described herein) may achieve better reach in the interproximal areas between the teeth, with or without a sweeping motion. As further described herein, a powered tapping motion with certain parameters may have particular applicability when used alone for the gum line area.

[0030]

[0039] FIG. 4 illustrates a graphical "golden triangle" that represents the optimal operating region of the power tapping parameters when used with a personal care device such as an oral cleaning device or a power toothbrush device. When the optimally operating tapping parameters are combined with the optimal sweep parameters, the "golden triangle" becomes a "golden pyramid". The abscissa of FIG. 4 represents the tapping amplitude that may include the movement of the cleaning element or the tip of the bristles, and the ordinate represents the tapping frequency that may include the movement of the cleaning element or the tip of the bristles. The term frequency refers to the number of cycles in a given time interval, for example, 1 second. As used herein, the term amplitude refers to (i) the peak amplitude that may include the maximum absolute value of the signal, or (ii) the peak-to-peak amplitude that may include the absolute value between the maximum and minimum amplitudes. The desirable range of amplitudes for the power tapping motion is from about 0.25 mm to about 3 mm, but the power tapping motion generally includes a periodic vertical motion equal to or greater than 0.5 mm.

[0031]

[0040] In an embodiment, the desired range of amplitude for the power tapping motion is about ±0.25 mm to about ±3 mm, and the power tapping motion generally includes a periodic vertical motion equal to or greater than 0.5 mm. Amplitudes higher than ±3 mm (i.e., beyond the rightmost point of region 400) are undesirable due to the risk of teeth chattering, and the platen of the toothbrush device may strike the occlusal surface of the opposing jaw. In addition, amplitudes higher than ±3 mm may lead to undesirable vibration of the oral and nasal tissues and unpleasant sensations on the treatment surface. Frequencies lower than 0.25 Hz are too slow to be effective. Frequencies higher than 520 Hz are more than twice the primary resonant frequency and are undesirable. It should be understood that the recommended oral care routine lasts for 2 minutes, and assuming an average of 32 teeth, approximately 3.75 seconds can be spent on each tooth during the recommended oral care routine. Therefore, if the frequency of occurrence of the power tapping motion were slower than 4 seconds, it would be too slow to be applied uniformly throughout the mouth (i.e., to all interproximal spots). Therefore, in a preferred embodiment, the frequency of occurrence of the power tapping motion is every 3.75 seconds (i.e., a frequency of approximately 0.27 Hz). In an embodiment, the minimum frequency is approximately 2 Hz (i.e., at least every 0.5 seconds). In a further embodiment, the power tapping motion may occur multiple times per pass over a tooth, so that the user experiences the power tapping motion uniformly throughout the mouth (i.e., at all interproximal spots and / or each tooth). Thus, the required frequency is approximately 20 Hz (i.e., at least every 0.05 seconds). Of course, it should be understood that if the oral care routine is shorter or longer than 2 minutes, the frequency of occurrence of the power tapping motion is adjusted accordingly, so that the frequency of occurrence of the power tapping motion is uniform throughout the oral care routine. It should be appreciated that in other embodiments, it may be desirable to have the frequency of occurrence of the motorized tapping motion be inconsistent or non-uniform, for example, based on an analysis of particular areas where the tapping motion is more beneficial than other areas.

[0032]

[0041] In an exemplary embodiment, the sweeping motion is combined with a tapping motion having an amplitude of 0.25 mm, and the addition of the tapping motion may produce a 1% improvement in cleaning performance in the gum line area, a 3% improvement in the interdental area, and an overall improvement of 1% when considering the coverage of all surfaces to be cleaned. However, applicants have recognized and appreciated that when the tapping motion is set to a peak-to-peak amplitude of approximately 0.5 mm and a frequency of approximately 250 Hz, the tapping motion alone achieves a significant improvement in cleaning performance in the gum line area over the combination of the tapping motion and the sweeping motion with a rotational amplitude of 2.5 degrees or 5 degrees. This is because the sweeping motion prevents the cleaning element or bristles from entering the gum line area (i.e., the gum-tooth confluence space or the space where the gums meet the teeth). In an embodiment, the tapping motion alone with the aforementioned parameters may achieve an 18.5% improvement in cleaning performance in the gum line area over the combination of the tapping motion and the sweeping motion with a rotational amplitude of 2.5 degrees or 5 degrees. Importantly, the peak-to-peak amplitude of approximately 0.5 mm is measured between adjacent maximum and minimum peaks of a single cycle of the tapping motion. Thus, the peak-to-peak amplitude of approximately 0.5 mm can include values ​​0.25 mm greater than the nominal value and values ​​0.25 mm less than the nominal value, as illustrated in FIG. 5. The peak-to-peak amplitude of approximately 0.5 mm is measured between the maximum peak 500 and the minimum peak 500. Max and a minimum peak of 500 Min 5. The maximum and minimum peaks are adjacent to each other in the cycle shown in FIG. 5, and the peak-to-peak amplitude is measured at a distance of 5. In another embodiment, the tapping motion is set at an amplitude of approximately 1.0 mm and a frequency of approximately 500 Hz. Such an embodiment also provides an improvement in cleaning performance in the gum line area over a combination of a sweeping motion with a rotational amplitude of 2.5 degrees and a tapping motion.

[0033]

[0042] The tapping motion improves the performance of the sweeping motion by un-trapping or un-pinning the bristles. Trapping or pinning of the bristles is a phenomenon where the bristles become constrained or trapped under the heavy load of the sweeping motion alone and are no longer able to move freely with the sweeping motion delivered by the drive train. If the user applies too much load when brushing, the movement of the bristle bundles may be partially constrained on the tooth surface. As a result of the constraining, the sweeping motion may be reduced and cleaning performance may be impaired. If the user applies even more load, the bristle bundles may become trapped or pinned and the bundles do not move at all when brushing. As a result of the trapping or pinning of the bristles, the sweeping motion does not occur and the user does not benefit from the sweeping motion from the drive train assembly. When the bristles are constrained or trapped, the cleaning benefit is only regained when the user manually moves the product to a new orientation and releases the bristles from the heavy load.

[0034]

[0043] The sweeping motion is best performed when the bristles can touch the tooth surface and move freely along a large surface area without being constrained. When brushing using both the sweeping motion and the tapping motion, the bristle bundles spread out as the load increases or as the brush head moves in the direction DR1 due to the drive train assembly generating a vertical up-down motion (i.e., the powered tapping motion). As the load increases due to the force exerted by the drive train assembly or otherwise due to the load applied by the user, the bundles may become more and more constrained. However, if the amplitude of the brush head movement in the direction DR1 is large enough, the large amplitude of the movement may cause the constrained or trapped bristles to buckle, effectively releasing or relieving the load on the bristles. Thus, adding a tapping motion of a sufficiently large amplitude to the sweeping motion can allow the bristles to move more freely, thereby improving cleaning performance.

[0035]

[0044] Importantly, when the brush head moves in direction DR2 during the cyclic tapping motion, the action is reversed and the load is further reduced so that the tufts become less and less constrained. The tapping motion may allow the tufts to cover a larger surface area during the sweeping motion, improving plaque removal by restoring the beneficial sweeping motion.

[0036]

[0045] The addition of a tapping motion to a sweeping motion also achieves deeper reach into the gum pocket to remove subgingival plaque. The addition of a tapping motion achieves improved cleaning performance in the peripheral, interproximal, mesial, and buccal areas within the gum pocket, as well as improved overall cleaning performance. In an exemplary embodiment, the deeper reach and improved cleaning performance is achieved under a roll angle of 30 degrees, a roll angle of 45 degrees, a roll angle of 60 degrees, or any suitable roll angle. Thus, the addition of a tapping motion makes the cleaning efficiency of the brush more robust to user orientation and less dependent on user technique than when using only a sweeping motion.

[0037]

[0046] Improved cleaning performance can be achieved by using the key operating parameters for the tapping motion discussed herein. Although various drive train assemblies can be implemented to generate the tapping motion, one exemplary assembly is discussed below simply to illustrate how the present invention can be implemented and practiced.

[0038]

[0047] 6, an exemplary oral cleaning device 100 is provided that includes a body portion 102 having a housing and a cleaning unit 104 attached to the body portion 102. The device 100 is depicted as part of a system S that uses sweeping and / or tapping motions to achieve optimal cleaning performance for all target areas of the user's mouth. The cleaning unit or member 104 includes a brush head 114 at its end remote from the body portion 102. The brush head 114 includes a bristle surface 115 that provides a plurality of cleaning elements 116 or bristles. According to an embodiment, the cleaning elements or bristles extend along an axis generally perpendicular to the elongation axis of the unit, although many other embodiments of the cleaning unit and cleaning elements are possible.

[0039]

[0048] The cleaning unit 104, the brush head 114, and / or the bristle surface 115 are mounted so as to be movable relative to the main body housing 102. This movement can be any of a variety of different movements, including oscillation or rotation, among others. According to one embodiment, the cleaning unit 104 is mounted to the main body housing 102 so as to be oscillable relative to the main body housing 102, or as another example, the brush head 114 is mounted to the cleaning unit 104 so as to be oscillable relative to the main body housing 102, or as another example, the bristle surface 115 is mounted to the cleaning unit 104 so as to be oscillable relative to the main body housing 102. The cleaning unit 104 can be fixedly mounted to the main body housing 102, or alternatively, the cleaning unit 104 is removably mounted such that the cleaning unit 104 can be replaced with a new one when the cleaning elements or bristles or another component of the device wear out and require replacement.

[0040]

[0049] The body portion includes a drive train assembly 122 having an actuator or motor for generating motion, and a transmission component 124 or shaft for transmitting the generated motion to the cleaning unit. For example, the drive train assembly 122 includes a motor or electromagnet that generates motion of the drive train shaft 124, which is then transmitted to the cleaning unit 104. The drive train and motor 122 may include components such as a power source, an oscillator, and one or more electromagnets, among others. In this embodiment, the power source includes one or more rechargeable batteries (not shown), which may be electrically charged, for example, in a charging holder in which the oral cleaning device 100 is placed when not in use.

[0041]

[0050] The body portion further comprises a user input 126 for activating and deactivating the drive train assembly 122. The user input 126 allows the user to operate the toothbrush 100, e.g., to turn the toothbrush 100 on and off. The user input 126 is, for example, a button, a touch screen, a user interface, or a switch. The body portion may further comprise a mode input 128 for selecting different operating modes selectable by the user. The mode input 128 allows the user to operate the toothbrush 100, e.g., to switch between different modes of the drive train assembly 122. The mode input 128 is, for example, a button, a touch screen, a user interface, or a switch. An indicator 129, such as a light emitting diode (LED) or any suitable alternative, may also be included on the body portion, for example, to indicate whether the device is powered on and which of the different operating modes has been selected. As described herein, the indicator 129 may also be used to instruct the user to focus on a particular area of ​​the user's mouth.

[0042]

[0051] The main body of the device also includes a controller 130. The controller 130 is formed of one or more modules and is configured to operate the oral cleaning device 100 in response to inputs, such as inputs obtained through the user input 126 or inputs from one or more sensors in the device. The controller 130 may include, for example, a processor 132 and a memory 134, and may optionally include a connection module 138. The processor 132 may take any suitable form, such as, but not limited to, a microcontroller, multiple microcontrollers, a circuit, a single processor, multiple processors, etc. The memory 134 may take any suitable form, such as non-volatile memory and / or RAM. The non-volatile memory includes a read-only memory (ROM), a hard disk drive (HDD), or a solid-state drive (SSD). The memory may store, among other things, an operating system and sensor data from the sensor. The RAM is used by the processor for temporary storage of data. According to an embodiment, the operating system includes code that, when executed by the controller 130, controls the operation of the hardware components of the oral cleaning device 100. In an embodiment, the connectivity module 138 transmits the collected sensor data and may be any module, device or means capable of transmitting a wired or wireless signal, such as, but not limited to, a Wi-Fi, Bluetooth, near field communication and / or cellular module.

[0043]

[0052] In an embodiment, the body portion of the device also includes one or more sensors 140. Although the sensors are illustrated in the body portion 102, the one or more sensors may be located anywhere in the device, such as, for example, in the cleaning unit 104 or in the head member 114. According to an embodiment, the sensors may be integrated with the controller 130. In an embodiment, the sensors 140 are configured to generate information indicative of the acceleration and / or angular orientation of the device 100 relative to the user's teeth. The sensors 140 may include inertial motion sensors, such as an accelerometer, a gyroscope, or a magnetic sensor. According to an embodiment, the sensors 140 are configured to provide six-axis (three-axis translation and three-axis rotation) readings of relative motion, for example, using a three-axis gyroscope and a three-axis accelerometer. As another example, the sensors 140 are configured to provide nine-axis readings of relative motion, for example, using a three-axis gyroscope, a three-axis accelerometer, and a three-axis magnetometer. Other sensors may be used alone or in conjunction with these sensors, including, but not limited to, pressure sensors, and other types of sensors such as capacitance sensors, cameras, photocells, clocks, timers, and other types of sensors. Many different types of sensors may be utilized as described or otherwise contemplated herein. Sensor 140 may comprise two or more sensors that function together as a 6-axis or 9-axis spatial sensor system.

[0044]

[0053] According to embodiments, the controller 130 may be programmed and / or configured to dynamically modify the output of the drive train assembly 122 to adapt the movement of the cleaning elements of the cleaning unit to a particular portion of the user's mouth. By using different operating modes based on where the cleaning unit is located within the mouth, the cleaning performance of the device is improved for that particular space within the user's mouth.

[0045]

[0054] The system S further comprises a computing device 101A, which includes a processor and a non-transitory storage medium, the non-transitory storage medium including program code for causing the processor to execute algorithms according to various embodiments described herein. The computing device 101A is a general-purpose computer, a mobile device, a customized dedicated computing device, or any other computing device capable of storing and executing the programs described herein. The program operated by the computing device 101A may be a mobile application, which is also configured to display a graphical interface 101B of the user's tooth model. In an alternative embodiment, the computing device 101A cooperates with the mobile application or another application to display the user's tooth model.

[0046]

[0055] Improved cleaning performance can be achieved by using the key operating parameters for the tapping motion discussed herein. Although various drive train assemblies can be implemented to generate the tapping motion, an exemplary assembly is discussed below simply to illustrate how the present invention can be implemented and practiced.

[0047]

[0056] Referring to FIG. 7, in one embodiment, a schematic drive train assembly 700 of an oral cleaning device includes an electromagnetic assembly for generating a periodic rotational movement (i.e., a sweeping motion). The drive train assembly 700 generally includes a resonator or load mass 710, an elastic member 720, a magnet 730, and an electromagnetic assembly 740. The load mass or resonator 710 (which may be the cleaning unit 104 or may be connected to the cleaning unit 104) may be connected to a drive train shaft 724 (e.g., shaft 124) to transmit vibrations to the cleaning unit (e.g., member 104). The resonator 710 is also connected to an end 722 of an elastic member 720, which may be any suitable spring, such as a tension spring, a torsion spring, a compression spring, a leaf spring, a V-shaped spring, a U-shaped spring, or any of a variety of different spring shapes, types, and sizes. A magnet 730 is attached to an end 724 of the resilient member 720, and an actuator comprising an electromagnetic assembly 740 is positioned to interact with the magnet 730. End 724 of the magnet 730 is opposite end 722. The electromagnetic assembly 740 is connected to a power source and a circuit board assembly 780 for controlling the electromagnetic field generated by the conductors. The magnet 730 may be any suitable permanent magnet, such as a neodymium magnet and a silicon magnet. The electromagnetic assembly 740 may comprise any suitable conductor made of any suitable non-magnetic material, such as copper, aluminum, or the like, or any combination thereof. Although FIG. 7 illustrates the electromagnetic assembly 740 as a coil, it should be understood that any suitable geometry or alternative components are contemplated.

[0048]

[0057] The resonator 710 is configured to rotate about a central axis A to periodically move the cleaning unit and its cleaning elements with a sweeping motion SM. To generate the rotational sweeping motion SM, the first and second conductors 740A and 740B of the electromagnetic assembly 740 are configured to generate an electromagnetic field to interact with the north and south poles of the magnet 730. In other words, the drive train assembly 700 can generate switching currents in the conductor coils that alternate the direction of the electromagnetic field to rotate the magnet 730 with a sweeping motion SM about the axis A. With reference to FIG. 9 , the magnet 930 represents the magnet 730, and the conductors 940A and 940B represent the conductors 740A and 740B. Depending on the orientation of the north and south poles of the magnet 930, the polarities of the conductors 940A and 940B can be alternated to push and pull the magnet 930 with a sweeping motion SM about the central axis A. Reversing the polarity of the conductors 940A and 940B moves the magnet 930 around the central axis A, and switching the polarity of the conductors 940A and 940B back to the orientation shown in Figure 9 pulls the magnet 930 back to the default orientation. The pivot point 750 in Figure 7 reverses the sweeping motion, thereby allowing for balancing of the movement or reaction forces by utilizing the natural or self-frequency. As the magnets 730, 330 rotate, the elastic member 720 and the resonator 710 also rotate, and therefore the connected cleaning units and cleaning elements also rotate in a sweeping motion SM around the central axis A.

[0049]

[0058] The electromagnetic assembly illustrated in FIG. 7 may be modified by adding third and fourth conductors 840C and 840D, as illustrated in electromagnetic assembly 840 in FIG. 8. The third and fourth conductors 840C and 840D are also configured to generate electromagnetic fields to interact with the north and south poles of magnet 830 to move magnet 830. Furthermore, depending on the configuration of the third and fourth conductors 840C and 840D relative to magnet 830, the additional conductors move magnet 830 in a vertical up-down motion (i.e., tapping motion TM) instead of a sweeping rotational motion. It should be understood that conductors 840C and 840D may be used to move magnet 830 in a tapping motion TM while first and second conductors 840A and 840B move magnet 830 in a sweeping motion SM. Conductors 940C and 940D in FIG. 9 represent conductors 840C and 840D. The configuration of conductors 940C and 940D illustrated in FIG. 9 allows magnet 930 to move in the illustrated upward vertical direction. Conductors 940A and 940B are located substantially midway or at the center point of the south and north poles of magnet 930, respectively, while conductors 940C and 940D are located close to or below the bottom side of the south and north poles of magnet 930, respectively. Pivot point 850 in FIG. 8 also reverses the upward vertical movement, thereby allowing for movement or counterforce balance by utilizing the natural frequency or self-frequency. In addition, reversing the polarity of conductors 940C and 940D from the configuration illustrated in FIG. 9 attracts magnet 930 in the downward vertical direction.

[0050]

[0059] In the illustrated embodiment, pivot point 850 is located along axis A within elastic member 820. Pivot point 850 is shown as an imaginary point within elastic member 820 that reverses sweeping motion SM and / or tapping motion TM. Pivot point 850 allows for balancing of movement or reaction forces by utilizing the self-oscillation or natural frequency of drive train assembly 800. Although pivot point 850 is an imaginary point in FIGS. 8 and 9, it should be understood that in alternative embodiments pivot point 850 may be embodied as a structural pivot that reverses the sweeping motion and / or tapping motion. Additionally, it should be understood that in different embodiments pivot point 850 may be located at a different point along axis A.

[0051]

[0060] The configuration of the drive train assembly 800 allows free rotational movement of the cleaning unit and cleaning elements about the x and y axes of the oral cleaning device while restricting rotation about the z axis and translation in the y axis. Free rotation about the x axis refers to rotation about axis 860. Free rotation about the y axis refers to rotation about the central axis A. The z axis refers to axis 870 or an axis extending in the radial direction RD2. In FIG. 8, axis 860 is perpendicular to central axis A and passes through pivot point 850, although axis 860 may be positioned along a different point on axis A.

[0052]

[0061] As described herein, the various motions described or otherwise contemplated herein may be implemented within a single oral cleaning device such that the oral cleaning device may optimally operate in all target areas of the user's mouth (e.g., gum line, interproximal, and overall surfaces) depending on how the motions are actuated. In one embodiment, the device may be configured to use an additive or combination of sweeping and tapping motions to target large surfaces of the teeth, and to use only tapping motions to target the gum line area. The device's controller 130 may be factory programmed with different operating modes (e.g., a mode for large surface areas, a mode for the gum line area, a mode for the interproximal area, etc.). Applicant has recognized and understood that for the gum line area, it may be beneficial to stop the sweeping motion and use only a tapping motion with certain parameters described or otherwise contemplated herein.

[0053]

[0062] To allow a user to utilize two or more operating modes during a single brushing routine, the oral cleaning device may include a mode input (e.g., input 128) selectable by the user. For example, when the user is operating the device during a brushing routine, the user may select a first operating mode for interproximal areas and a second operating mode different from the first operating mode for gum line areas. The first operating mode may include a large motorized tapping motion with a sweeping motion, and the second operating mode includes only a tapping motion and does not include a sweeping motion. In other embodiments, when the device is turned on to start a brushing routine, the first default or normal operating mode is automatically activated, and during the brushing routine, the user may switch from the default or normal first operating mode to one or more other operating modes.

[0054]

[0063] In an exemplary embodiment, after a user powers on the device and the drive train assembly 122 is actuated, a center LED of the indicator 129 may be illuminated to indicate a first default or normal operating mode. For example, when a user desires to focus on the gum line area during a brushing routine, the user may press the input 128 to select one or more different operating modes of the device. Each time the input 128 is pressed, a different indicator of the indicator 129 may be illuminated to indicate which mode has been actuated. In an embodiment, the left LED of the indicator 129 corresponds to the gum line mode and the right LED of the indicator 129 corresponds to the interproximal mode. Of course, the LED indicators for indicating the gum line and interproximal modes may be reversed. Additionally, it should be understood that the configuration and location of the indicator 129 may be modified without departing from the spirit of the present disclosure. When a user no longer desires to focus on the gum line area during a brushing routine, the user may press the input 128 to select one or more other operating modes of the device. In alternative embodiments, the gumline mode, or for that matter any selectable mode, may automatically stop after a predetermined period of time and the normal or default mode may automatically restart.

[0055]

[0064] In other embodiments, instead of requiring a user to manually switch between operating modes, the device may automatically switch between different operating modes based on where in the mouth the user is holding the cleaning unit and / or cleaning element relative to different areas of the mouth. For example, when a user powers on the device, a first operating mode of the drive train assembly may be activated. When the device detects contact or alignment of the cleaning unit and / or cleaning element with a cleaning area of ​​the mouth (i.e., a brushing area, such as a gum line area), the controller 130 may automatically deactivate the first operating mode and activate the second operating mode such that the first operating mode is replaced with the second operating mode.

[0056]

[0065] To accomplish this, the controller 130 may receive input (i.e., sensor data) from the sensor 140 of the device 100, which may directly or indirectly measure the inclination or angle of the cleaning unit and / or cleaning elements relative to the tooth or gum surface. The controller 130 may receive the sensor data in real time or periodically. In an embodiment, the sensor 140 may send a constant stream of sensor data to the controller 130 for storage and / or analysis, or may temporarily store, aggregate or process the data before sending it to the controller 130. Once the sensor data is received by the controller 130, it may be processed by the processor 132, which may direct modifications of the operating mode of the device 100 accordingly. In an embodiment, during periods when the cleaning elements of the cleaning unit are in contact with or aligned with the gum line during a brushing routine, the controller 130 may automatically switch to a particular operating mode that is most beneficial to such area. In other words, the sensor 140 may be configured to detect angular information of the cleaning element positioned relative to one or more teeth or gum surfaces, and the controller 130 may (i) determine that the cleaning element is in proximity to a cleaning area of ​​the user's mouth based on the detected angular information, and (ii) select a mode of operation of the electromagnetic assembly based on the determination. In an embodiment, the selected mode of operation may involve the drive train shaft being cyclically driven only in a first direction or only in a second direction. In a further embodiment, the angular information may be detected by one sensor, and another sensor, i.e., a pressure sensor, may be used to detect whether the cleaning element is at least partially in contact with one or more teeth or gum surfaces. Both the detected angular information and the pressure sensor data may be used together to enable the controller 130 to select a mode of operation of the electromagnetic assembly beneficial for a particular area of ​​the user's mouth. In an embodiment, the mode of operation includes only a tapping motion. In an embodiment, the mode of operation includes only a sweeping motion.When the cleaning elements of the cleaning unit are no longer in contact with or aligned with the gumline, the controller 130 may automatically switch the gumline mode of operation off and revert to the default mode of operation.

[0057]

[0066] In further embodiments, the user may use the device 100 in combination with an on-screen application, such as the graphical interface 101B. Throughout the cleaning routine, the graphical interface 101B may display a model of the user's teeth and instructions to guide the user to a particular part of the oral cavity to focus on, according to the device's programmed operating system. The instructions may be embodied as a textual prompt on the graphical interface, such as "gum line area." Alternatively, the instructions may be embodied as a non-textual prompt on the graphical interface, such as an arrow pointing to the area to focus on, or a color-coded highlighting to direct the user's attention to the particular area to focus on, or any other alternative manner. The controller 130 may receive input (i.e., sensor data) from the sensor 140 to determine when the user has followed the instructions from the graphical interface, and may switch between operational modes accordingly. Thus, for example, if the controller receives input indicating that the user appears to be focused on the gumline area and that the cleaning elements are in contact with or aligned with the gumline area, the controller 130 modifies the operating mode or otherwise modifies the output of the drive train assembly 122 to optimize the cleaning performance of the oral cleaning device for that particular area. The modification may include activating a tapping motion to replace any already activated sweeping motion for the gumline rear as described or otherwise contemplated herein. In an embodiment, the modification includes ceasing cyclical driving of the drive train shaft about the central axis of the device.

[0058]

[0067] In further embodiments, the controller 130 may receive input from a timer or clock to determine the amount of time that has elapsed since the start of the cleaning routine and may switch between the operating modes of the cleaning device accordingly after the particular amount of time has elapsed. For example, a first default or normal operating mode may be automatically activated upon powering on the device to start the cleaning routine, and the controller may automatically switch from the first default or normal operating mode to a second, different operating mode after a particular amount of time has elapsed during the cleaning routine. The second, different operating mode may be based, for example, on the part of the user's mouth shown in the graphical interface 101B. For example, additionally or alternatively, the second, different operating mode may be based on an input from the sensor 140. The user may be alerted that a particular amount of time has elapsed during the cleaning routine by a suitable vibration using a drive train assembly described or otherwise contemplated herein. The user may be alerted that a particular amount of time has elapsed during the cleaning routine by light and / or sound in addition to or instead of vibration. The different modes may be switched in sequence. In certain embodiments, the controller 130 may switch from a first operating mode to a second operating mode after a first amount of time has elapsed during the cleaning routine. The controller 130 may switch from the second operating mode to a third operating mode after a second amount of time has elapsed during the cleaning routine. The first and second amounts of time may be the same or different. Furthermore, it should be understood that the first operating mode may be different from the second operating mode, and the second operating mode may be different from the third operating mode, while the first operating mode may be the same or different from the third operating mode. With respect to the first and second amounts of time, the first amount of time may be measured from the start of the cleaning routine and the second amount of time may be measured from the end of the first amount of time or from the start of the cleaning routine.

[0059]

[0068] In further embodiments, one or more indicators 129 on the body of the device 100 may be used to indicate which area the user should focus on. For example, throughout the cleaning routine, each of the LEDs may be illuminated when the particular target area associated with that LED is to be brushed. If the left LED of the indicator 129 corresponds to the gumline mode, the left LED may be configured to be illuminated continuously or emit a pattern of blinking lights during the period when the user is supposed to target the gumline area with the device 100. This period may be based on input from the sensor 140. Instead of using an on-off or blinking light, the LEDs may be illuminated in a particular color to indicate which area the user should focus on. For example, to instruct the user to focus on the gumline area during the cleaning routine, the LEDs corresponding to other areas (e.g., interproximal, etc.) may be illuminated in red, and only the LED corresponding to the gumline area may be illuminated in green. When the user is expected to focus on the interproximal area instead of the gumline area, the LED corresponding to the gumline area may be switched from green to red and the LED corresponding to the interproximal area may be switched from red to green, although of course it should be understood that in different embodiments the colors may be changed.

[0060]

[0069] FIG. 10 depicts a flow chart illustrating a method 1000 of operating an oral cleaning device according to an exemplary embodiment in which the device controllably produces sweeping and tapping motions to optimize cleaning performance for target areas of the mouth.

[0061]

[0070] The method begins at step 1010, where an oral cleaning device is prepared. As described or otherwise contemplated herein, the oral cleaning device includes a body portion, a cleaning unit, i.e., a brush head member, a controller, and a drive train assembly. The cleaning unit includes a cleaning element or a set of bristles extending from the cleaning unit in a cleaning element direction or bristles direction. The drive train assembly includes an actuator configured to generate a periodic rotational movement around a central axis of the oral cleaning device, and a drive train shaft configured to transmit the periodic rotational movement to the cleaning unit. The drive train assembly is also configured to generate and transmit a periodic linear movement to the cleaning unit. The cleaning element of the cleaning unit is configured to move in first and second different movement patterns due to the transmitted periodic rotational movement and periodic linear movement.

[0062]

[0071] In step 1020, the drive train assembly is actuated to drive the drive train shaft about the central axis A of the oral cleaning device. Driving the drive train shaft moves the cleaning elements of the cleaning unit in a first movement pattern, the first movement pattern including a first direction about the central axis of the oral cleaning device. The first movement pattern may embody any of the sweeping motions described or otherwise contemplated herein, but should not be limited to only those shown. Any suitable actuator, such as, for example, an electromagnetic assembly described herein, may oscillate the sweeping shaft about the central axis A.

[0063]

[0072] In step 1030, the drive train assembly is actuated to drive the drive train shaft around another axis of the oral cleaning device, the other axis being different from and perpendicular to the central axis A. In an embodiment, the other axis is the x-axis of the oral cleaning device. Driving the drive train shaft in this manner causes the cleaning elements of the cleaning unit to move in a second movement pattern, the second movement pattern including a second direction different from the first direction described in step 1020. The second direction refers to a direction along the z-axis of the oral cleaning device or a direction parallel to at least some of the cleaning elements. The second movement pattern may embody any of the tapping motions described herein, but should not be limited to only those described or otherwise shown. Any suitable actuator, such as, for example, an electromagnetic assembly described herein, may translate the sweep shaft around the x-axis and along the z-axis.

[0064]

[0073] In step 1040, the controller controls the drive train assembly to simultaneously produce first and second motion patterns in a first operating mode (e.g., interproximal or global mode) during a single brushing routine. The first motion pattern refers to a sweeping motion component. The second motion pattern refers to a tapping motion component, where the cleaning element moves in a direction parallel to the z-axis of the device with an amplitude equal to or greater than 0.25 mm and a frequency equal to or greater than 0.25 Hz.

[0065]

[0074] In step 1050, during the same single brushing routine, the controller controls the drive train assembly to switch from the first operating mode to the second operating mode so that the cleaning element conforms to a particular part of the user's mouth. Similar to the first operating mode including a combination of the first and second movement patterns to target a particular area of ​​the user's mouth, the second operating mode also includes either or both of the first and second movement patterns, and further, one or more movement patterns of the second operating mode may be different from the combination of movement patterns used for the first operating mode, such that the second mode targets a different area of ​​the user's mouth than the first operating mode. Thus, if the first operating mode was a full mode, the second operating mode may be, for example, a gumline mode. In an exemplary embodiment, the first operating mode includes a sweeping motion plus a tapping motion predetermined to target a larger surface area of ​​the teeth, and the second operating mode includes only a tapping motion predetermined to target the gumline area.

[0066]

[0075] The operational effect of the oral cleaning devices described herein is that they can provide improved cleaning performance in key areas of the mouth by driving the cleaning elements of the device with a vertical cyclic motion parallel to the direction of the cleaning elements, with the amplitude of the vertical motion being equal to or greater than 0.25 mm (i.e., power tapping). The inventive power tapping motion in the oral cleaning device (i) achieves deeper reach into the gingival pocket to remove subgingival plaque, (ii) achieves higher peak force at the surface to improve plaque and / or stain removal, (iii) improves plaque removal by preventing pinning of the bristle tufts and restoring the beneficial sweeping action of the tufts, (iv) achieves greater flexibility with respect to variability in use such as toothbrush placement, toothbrush angle, toothbrush pressure, and (v) offers new options for consumer experience modes.

[0067]

[0076] As defined and used herein, all definitions should be understood to take precedence over dictionary definitions, definitions in documents incorporated by reference, and / or ordinary meanings of the defined terms.

[0068]

[0077] As used in this specification and claims, the singular terms "a," "an," and "the" should be understood to mean "at least one" unless otherwise clearly indicated.

[0069]

[0078] As used in the specification and claims, the term "and / or" should be understood to mean "either or both" of the elements connected thereby, i.e., elements that are present conjunctively in some cases and disjunctively in other cases. Multiple elements listed with "and / or" should be interpreted in the same manner, i.e., as "one or more" of the elements connected thereby. Elements other than the elements specifically identified by the "and / or" clause may optionally be present, whether related or unrelated to those elements specifically identified.

[0070]

[0079] As used herein and in the claims, "or" should be understood to have the same meaning as "and / or" defined above. For example, when separating items in a list, "or" or "and / or" should be interpreted as inclusive, i.e., including at least one of a number or list of elements, but also including more than one element, and optionally including additional unlisted items. Only terms clearly indicated otherwise, such as "only one of" or "only one of" or "consisting of" when used in the claims, refer to the inclusion of only one element of a number or list of elements. In general, as used herein, the term "or" should be interpreted as indicating exclusive alternatives (i.e., "one or the other but not both") only when preceded by terms of exclusivity, such as "either," "one of," "only one of," or "only one of."

[0071]

[0080] As used in this specification and claims, the phrase "at least one" when referring to a list of one or more elements should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed in the list of elements, and not excluding any combinations of elements in the list of elements. This definition allows for the optional presence of elements other than those specifically identified in the list of elements to which the phrase "at least one" refers, whether related or unrelated to those elements specifically identified.

[0072]

[0081] In the claims and the above specification, all transitional phrases such as "comprising," "including," "carrying," "having," "containing," "accompanying," "holding," "comprising," and the like, are to be understood as open-ended, i.e., meaning including but not limited to. Only the transitional phrases "consisting of" and "consisting essentially of" shall be closed or semi-closed transitional phrases, respectively.

[0073]

[0082] It should also be understood that, unless expressly indicated otherwise, in any method claimed herein that includes two or more steps or actions, the order of the method steps or actions is not necessarily limited to the order in which the method steps or actions are described.

[0074]

[0083] Although several inventive embodiments have been described and illustrated herein, those skilled in the art will readily conceive of various other means and / or structures for performing the functions described herein and / or obtaining one or more of the results and / or advantages described herein. Each such variation and / or modification is deemed to be within the scope of the inventive embodiments described herein. More generally, those skilled in the art will readily appreciate that all parameters, dimensions, materials and configurations described herein are meant to be exemplary, and that the actual parameters, dimensions, materials and / or configurations will depend on the particular application or applications in which the teachings of the present invention are used. Those skilled in the art will recognize or be able to ascertain using no more than routine experimentation many equivalents to the specific inventive embodiments described herein. Thus, the foregoing embodiments have been presented by way of example only, and it will be understood that within the scope of the appended claims and their equivalents, the inventive embodiments may be practiced otherwise than as specifically described and claimed. Inventive embodiments of the present disclosure are directed to each individual feature, system, article, material, kit and / or method described herein. In addition, any combination of two or more such features, systems, articles, materials, kits, and / or methods is within the scope of the present disclosure, if such features, systems, articles, materials, kits, and / or methods are not mutually inconsistent.

Claims

1. a cleaning unit having a set of cleaning elements; a body portion coupled to the cleaning unit; a drive train assembly disposed within the body portion; An oral cleaning device comprising: The drive train assembly includes: a drive train shaft at least partially housed within the body portion and engaging the cleaning unit; (i) an electromagnetic assembly that periodically drives the drive train shaft, thereby periodically driving the cleaning unit in a first direction around or along a first axis of the oral cleaning device, and (ii) an electromagnetic assembly that periodically drives the drive train shaft, thereby periodically driving the cleaning unit in a second direction around or along a second axis of the oral cleaning device, wherein the second direction is different from the first direction and the second axis is perpendicular to the first axis; the electromagnetic assembly ceases cyclically driving the drive train shaft in the first direction while continuing to cyclically drive the drive train shaft in the second direction; or An oral cleaning device, wherein the electromagnetic assembly continues to cyclically drive the drive train shaft in the first direction while ceasing to cyclically drive the drive train shaft in the second direction.

2. The oral cleaning device of claim 1 , wherein the set of cleaning elements moves in the first direction or the second direction with an amplitude greater than 0.5 mm and less than 3 mm and a frequency greater than 0.25 Hz and less than 520 Hz.

3. The oral cleaning device of claim 1 , wherein the first axis is a central axis of the oral cleaning device.

4. the body portion further includes an input operable by a user to select a mode of operation; An oral cleaning device as described in claim 1, wherein by selecting the mode of operation, the electromagnetic assembly (i) stops cyclically driving the drive train shaft in the first direction and continues cyclically driving the drive train shaft in the second direction, or (ii) stops cyclically driving the drive train shaft in the second direction and continues cyclically driving the drive train shaft in the first direction.

5. a sensor that detects angular information at which the set of cleaning elements is positioned relative to one or more teeth or gum surfaces of a user's mouth; and a processor; The processor: receiving the sensed angle information from the sensor; determining that the set of cleaning elements is in proximity to the mouth cleaning area of ​​the user based on the received sensed angle information; The oral cleaning device of claim 1 , wherein a mode of operation of the electromagnetic assembly is selected in which the drive train shaft is cyclically driven only in the first direction or only in the second direction.

6. The oral cleaning device of claim 5 , wherein the cleaning area is a gum line area or an interdental area.

7. a resonator connected to the drivetrain shaft, the resonator rotating about the first axis; a resilient member having a first end, a second end, and a pivot point, the resilient member being connected to the resonator at the first end; a magnet connected to the second end of the elastic member; Further provided with The oral cleaning device of claim 1, wherein the electromagnetic assembly further comprises first and second conductors that interact with the magnet to periodically drive the drive train shaft, thereby periodically driving the cleaning unit around the first axis or in the first direction along the first axis.

8. The oral cleaning device of claim 7, wherein the electromagnetic assembly further comprises third and fourth conductors arranged parallel to the first and second conductors, the third and fourth conductors interacting with the magnet to periodically drive the drive train shaft, thereby periodically driving the cleaning unit around the second axis or in the second direction along the second axis.

9. 1. A drive train assembly for an oral cleaning device, the oral cleaning device having a body portion, the drive train assembly comprising: a drive train shaft at least partially housed within the body portion and engaging a cleaning unit including a set of cleaning elements; a resonator connected to the drive train shaft, the resonator rotating about a first axis of the oral cleaning device; a resilient member having a first end, a second end, and a pivot point, the resilient member being connected to the resonator at the first end; a magnet connected to the second end of the elastic member; an electromagnetic assembly comprising first and second conductors that interact with the magnet to cyclically drive the drive train shaft, thereby cyclically driving the cleaning unit in a first direction around or along the first axis of the oral cleaning device, the electromagnetic assembly further comprising third and fourth conductors that interact with the magnet to cyclically drive the drive train shaft, thereby cyclically driving the cleaning unit in a second direction around or along the second axis of the oral cleaning device; the second direction is different from the first direction, and the second axis is perpendicular to the first axis; the electromagnetic assembly continues to cyclically drive the drive train shaft in the second direction while ceasing to cyclically drive the drive train shaft in the first direction, or the electromagnetic assembly continues to cyclically drive the drive train shaft in the first direction while ceasing to cyclically drive the drive train shaft in the second direction.

10. 10. The drive train assembly of claim 9, wherein the set of cleaning elements move in the second direction with an amplitude greater than 0.5 mm and less than 3 mm and a frequency greater than 0.25 Hz and less than 520 Hz.

11. The drive train assembly of claim 9, wherein the electromagnetic assembly ceases cyclically driving the drive train shaft in the first direction or the second direction in response to user input received at an input in the main body portion of the oral cleaning device.

12. 10. The drive train assembly of claim 9, wherein the electromagnetic assembly ceases cyclically driving the drive train shaft in the first direction or the second direction in response to a sensor signal received from a sensor, the sensor signal indicating angular information at which the set of cleaning elements is positioned relative to one or more tooth or gum surfaces.

13. The drive train assembly of claim 9 , wherein the electromagnetic assembly ceases cyclically driving the drive train shaft in the first direction or the second direction after a specified amount of time during a cleaning routine.

Images