Patent Description:
The present embodiments relate generally to articles of footwear and include removable motorized adjustment systems.

Articles of footwear generally include two primary elements: an upper and a sole structure. The upper is often formed from a plurality of material elements (e.g., textiles, polymer sheet layers, foam layers, leather, synthetic leather) that are stitched or adhesively bonded together to form a void on the interior of the footwear for comfortably and securely receiving a foot. More particularly, the upper forms a structure that extends over instep and toe areas of the foot, along medial and lateral sides of the foot, and around a heel area of the foot. The upper may also incorporate a lacing system to adjust the fit of the footwear, as well as permitting entry and removal of the foot from the void within the upper. Likewise, some articles of apparel may include various kinds of closure systems for adjusting the fit of the apparel.

<CIT> describes an article of footwear and a footwear housing. The footwear housing includes a charging station that can be used to charge a battery in the footwear housing.

The invention is defined by an article of footwear according to claim <NUM>, a method of controlling an article of footwear according to claim <NUM> and a kit of parts according to claim <NUM>. Further embodiments are defined by the corresponding dependent claims. Additional non-claimed embodiments and aspects are presented in the description for the better understanding of the invention. In one aspect, the present disclosure is directed to an article of footwear. The article of footwear comprising an upper and a sole structure and an automated tensioning system that is configured to adjust a tension level of the article of footwear from a first tension level to a second tension level, where the first tension level is greater than the second tension level. The article of footwear also includes a charging assembly. The charging assembly having an internal charging device and a housing. The article of footwear has a sensor, where the sensor provides information to the automated tensioning system when the charging assembly is connected to an external charging device. Furthermore, the automated tensioning system is configured to loosen the article of footwear from the first tension level to the second tension level when the automated tensioning system receives information from the sensor indicating that the charging assembly is connected to the external charging device.

In another aspect, the present disclosure is directed to a method of controlling an article of footwear including an upper, a sole structure, an interior cavity, an automated tensioning system, a battery, a charging assembly, and a sensor. The method comprises receiving information from the sensor, where the sensor is configured to detect a connection of the charging assembly with an external charging device, and detecting if the charging assembly is connected to the external charging device. The method also includes automatically loosening the article of footwear through an operation of the automated tensioning system if the sensor determines that the charging assembly is connected to the external charging device.

In another aspect, the present disclosure is directed to a kit of parts for making an article of footwear in accordance with either of the previous aspects. The kit of parts includes an article of footwear with an upper, a sole structure, an interior cavity, an automated tensioning system, a battery, a charging assembly, and a first sensor. The external charging device is configured to connect with the charging assembly in order to charge the battery of the article of footwear, and the charging assembly includes a ferromagnetic material, such that the charging assembly can magnetically couple with the external charging device to hold the charging assembly and the external charging device together.

The following discussion and accompanying figures disclose articles of footwear and a method of charging articles of footwear. Concepts associated with the footwear disclosed herein may be applied to a variety of athletic footwear types, including running shoes, basketball shoes, soccer shoes, baseball shoes, football shoes, and golf shoes, for example. Accordingly, the concepts disclosed herein apply to a wide variety of footwear types.

To assist and clarify the subsequent description of various embodiments, various terms are defined herein. For consistency and convenience, directional adjectives are employed throughout this detailed description corresponding to the illustrated embodiments.

The term "longitudinal," as used throughout this detailed description and in the claims, refers to a direction extending a length of a component. For example, a longitudinal direction of an article of footwear extends between a forefoot region and a heel region of the article of footwear. The term "forward" is used to refer to the general direction in which the toes of a foot point, and the term "rearward" is used to refer to the opposite direction, i.e., the direction in which the heel of the foot is facing.

The term "lateral direction," as used throughout this detailed description and in the claims, refers to a side-to-side direction extending a width of a component. In other words, the lateral direction may extend between a medial side and a lateral side of an article of footwear, with the lateral side of the article of footwear being the surface that faces away from the other foot, and the medial side being the surface that faces toward the other foot.

The term "side," as used in this specification and in the claims, refers to any portion of a component facing generally in a lateral, medial, forward, or rearward direction, as opposed to an upward or downward direction.

The term "vertical," as used throughout this detailed description and in the claims, refers to a direction generally perpendicular to both the lateral and longitudinal directions. For example, in cases where a sole is planted flat on a ground surface, the vertical direction may extend from the ground surface upward. It will be understood that each of these directional adjectives may be applied to individual components of a sole. The term "upward" refers to the vertical direction heading away from a ground surface, while the term "downward" refers to the vertical direction heading toward the ground surface. Similarly, the terms "top," "upper," and other similar terms refer to the portion of an object substantially furthest from the ground in a vertical direction, and the terms "bottom," "lower," and other similar terms refer to the portion of an object substantially closest to the ground in a vertical direction.

The "interior" of a shoe refers to space that is occupied by a wearer's foot when the shoe is worn. The "inner side" of a panel or other shoe element refers to the face of that panel or element that is (or will be) oriented toward the shoe interior in a completed shoe. The "outer side" or "exterior" of an element refers to the face of that element that is (or will be) oriented away from the shoe interior in the completed shoe. In some cases, the inner side of an element may have other elements between that inner side and the interior in the completed shoe. Similarly, an outer side of an element may have other elements between that outer side and the space external to the completed shoe. Further, the terms "inward" and "inwardly" shall refer to the direction toward the interior of the shoe, and the terms "outward" and "outwardly" shall refer to the direction toward the exterior of the shoe.

For purposes of this disclosure, the foregoing directional terms, when used in reference to an article of footwear, shall refer to the article of footwear when sitting in an upright position, with the sole facing groundward, that is, as it would be positioned when worn by a wearer standing on a substantially level surface.

In addition, for purposes of this disclosure, the term "fixedly attached" shall refer to two components joined in a manner such that the components may not be readily separated (for example, without destroying one or both of the components). Exemplary modalities of fixed attachment may include joining with permanent adhesive, rivets, stitches, nails, staples, welding or other thermal bonding, or other joining techniques. In addition, two components may be "fixedly attached" by virtue of being integrally formed, for example, in a molding process.

For purposes of this disclosure, the term "removably attached" or "removably inserted" shall refer to the joining of two components or a component and an element in a manner such that the two components are secured together, but may be readily detached from one another. Examples of removable attachment mechanisms may include hook and loop fasteners, friction fit connections, interference fit connections, magnetic connections, threaded connectors, cam-locking connectors, compression of one material with another, and other such readily detachable connectors.

<FIG> illustrates an embodiment of a footwear charging system ("charging system") <NUM>. As shown in <FIG>, charging system <NUM> may be a kit of parts in some embodiments. The kit of parts may include a container <NUM> configured to store components of charging system <NUM>. In different embodiments, charging system <NUM> may include a complementary pair of footwear ("pair") <NUM>, comprising a first article of footwear ("first article") <NUM> and a second article of footwear ("second article) <NUM>. For purposes of this discussion, a complementary pair of footwear refers to two articles of footwear that are designed to be worn as a pair by one user on a right foot and a left foot.

However, it should be understood that in other embodiments, the kit of parts comprising charging system <NUM> may be separate from complementary pair of footwear <NUM>. Thus, in some cases, charging system <NUM> may be manufactured or configured separately from complementary pair of footwear <NUM>. Furthermore, in some embodiments, charging system <NUM> may be utilized with a different pair of footwear.

Referring to <FIG>, in some embodiments, charging system <NUM> may further include an external charging unit ("charging unit") <NUM>. In different embodiments, charging unit <NUM> can include multiple components for connecting or contacting to various elements. In the embodiments depicted herein, charging unit <NUM> includes a first charging component ("first component") <NUM> and a second charging component ("second component") <NUM>. In other embodiments, there may be only one charging component, or there may be additional charging components.

Furthermore, in some embodiments, charging unit <NUM> of charging system <NUM> can include provisions for receiving power from an external power source of some kind. In some embodiments, charging unit <NUM> can include a power cord <NUM> that is configured to receive power from an external power source. In one example, power cord <NUM> can be plugged into a wall socket. Power cord <NUM> can comprise a plug and cord (or cable) in some embodiments. In one embodiment, power cord <NUM> may be configured for use in a wide range of environments. Thus, power cord <NUM> may be connected to a standard AC power source or outlet (i.e., sockets) in some embodiments. In one embodiment, power cord <NUM> may connect with a <NUM>-volt power supply. In another embodiment, power cord <NUM> may be configured for utilization with a range of voltages, including <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or other standard residential voltages, and/or DC power. In some cases, power cord <NUM> may be adapted for industrial voltage use. Thus, charging unit <NUM> may be readily used in most of the locations where charging unit <NUM> may be transported or used. Charging unit <NUM> will be discussed further below with respect to <FIG>.

As shown in <FIG>, container <NUM> may be configured to contain or store complementary pair of footwear <NUM> as well as charging unit <NUM> that comprises charging system <NUM>. In some embodiments, container <NUM> may be a box, such as a traditional shoebox or plastic resealable container, with a lid <NUM> or cover. For purposes of clarity, container <NUM> is illustrated here with a particular design. In <FIG>, container <NUM> is illustrated as a generally three-dimensional rectangular shoebox. However, in other embodiments, container <NUM> can comprise any type of housing with the capacity for storing articles of footwear. For example, container <NUM> can comprise a bag that resembles a traditional duffle-type bag. Additionally, container <NUM> could be sized to fit a single pair of footwear, a single article of footwear, or multiple pairs of footwear, as well as other portions of charging system <NUM>, in different embodiments. In other embodiments, however, container <NUM> could have any other design. In particular, container <NUM> could have another shape and/or size in other embodiments. Examples of other designs for a container include, but are not limited to, any type of box, receptacle, housing, platform, bags, and/or backpacks. Furthermore, the container could include any provisions for carrying the container, including any type of strap or handle. In embodiments including charging system <NUM>, container <NUM> can include provisions for storing various systems or components associated with an article or charging component. In particular, in embodiments including an inductive charging system (see further below), container <NUM> can provide or be configured to hold or secure components of the inductive charging system that allow power to be transferred from an external power source to complementary pair of footwear <NUM>.

In some embodiments, one or more parts of charging system <NUM> can include provisions for indicating the status of the charging system during use. In some cases, one or both articles of footwear comprising complementary pair of footwear <NUM> can include a visual indicator, such as a light, for indicating the charging status. In other cases, charging unit <NUM> can include a visual indicator, or can include a sound-based indicator, such as a speaker configured to produce a sound to indicate the charging status. In particular, charging indicators may be LED lights that are lit to indicate the charging status of an article of footwear in some embodiments. For example, if first article <NUM> is being charged alone, only one light associated with first article <NUM> may be lit. In another embodiment, if both articles of pair <NUM> are being charged, both a first light associated with first article <NUM> and a second light associated with second article <NUM> may be lit. Furthermore, the color of one or both charging indicators and/or any sounds may change depending on the status of the charging system. In different embodiments, charging indicators may be disposed along any portion of charging system <NUM>. However, in other embodiments, such as those illustrated herein, there may be no charging indicators included in charging system <NUM>.

For purposes of description, only one article of complementary pair of footwear <NUM> will be discussed in detail below. However, it should be understood that descriptions provided with reference to first article <NUM> may also be applicable to second article <NUM>, including directional adjectives and the identification of general components (e.g., a sole structure and an upper) comprising each article. In other embodiments, it should be understood that first article <NUM> and second article <NUM> may include some differences in structure and/or design depending on the desired use or function of pair <NUM>.

In different embodiments, one or both articles comprising pair <NUM> may be configured with an automated tensioning system ("tensioning system") <NUM>. In the current embodiment, first article <NUM> is shown in the form of an athletic shoe, such as a running shoe. However, in other embodiments, tensioning system <NUM> may be used with any other kind of footwear including, but not limited to, hiking boots, soccer shoes, football shoes, sneakers, running shoes, cross-training shoes, rugby shoes, basketball shoes, baseball shoes as well as other kinds of shoes. Moreover, in some embodiments, tensioning system <NUM> may be configured for use with various kinds of non-sports-related footwear, including, but not limited to, slippers, sandals, high-heeled footwear, loafers as well as any other kinds of footwear. As discussed in further detail below, a tensioning system may not be limited to footwear, and in other embodiments, a tensioning system and/or components associated with a tensioning system could be used with various kinds of apparel, including clothing, sportswear, sporting equipment, and other kinds of apparel. In still other embodiments, a tensioning system may be used with braces, such as medical braces.

As noted above, for consistency and convenience, directional adjectives are employed throughout this detailed description. Referring now to <FIG>, it can be seen that first article <NUM> may be divided into three general regions along a longitudinal axis <NUM>: a forefoot region <NUM>, a midfoot region <NUM>, and a heel region <NUM>. Forefoot region <NUM> generally includes portions of first article <NUM> corresponding with the toes and the joints connecting the metatarsals with the phalanges. Midfoot region <NUM> generally includes portions of first article <NUM> corresponding with an arch area of the foot. Heel region <NUM> generally corresponds with rear portions of the foot, including the calcaneus bone. Forefoot region <NUM>, midfoot region <NUM>, and heel region <NUM> are not intended to demarcate precise areas of first article <NUM>. Rather, forefoot region <NUM>, midfoot region <NUM>, and heel region <NUM> are intended to represent general relative areas of first article <NUM> to aid in the following discussion. Since various features of first article <NUM> extend beyond one region of first article <NUM>, the terms forefoot region <NUM>, midfoot region <NUM>, and heel region <NUM> apply not only to first article <NUM> but also to the various elements or components comprising first article <NUM>.

Referring to <FIG>, for reference purposes, a lateral axis <NUM> of first article <NUM>, and any components related to first article <NUM>, may extend between a medial side <NUM> and a lateral side <NUM> of the foot. Additionally, in some embodiments, longitudinal axis <NUM> may extend from forefoot region <NUM> to heel region <NUM>. It will be understood that each of these directional adjectives may also be applied to individual components of an article of footwear, such as an upper and/or a sole member. In addition, a vertical axis <NUM> refers to the axis perpendicular to a horizontal surface defined by longitudinal axis <NUM> and lateral axis <NUM>.

In different embodiments, first article <NUM> may include upper <NUM> and sole structure <NUM>. Generally, upper <NUM> may be any type of upper. In particular, upper <NUM> may have any design, shape, size, and/or color. For example, in embodiments where first article <NUM> is a basketball shoe, upper <NUM> could be a high-top upper that is shaped to provide high support on an ankle. In embodiments where first article <NUM> is a running shoe, upper <NUM> could be a low-top upper.

As shown in <FIG>, upper <NUM> may include one or more material elements (for example, meshes, textiles, foam, leather, and synthetic leather), which may be joined to define an interior void configured to receive a foot of a wearer. The material elements may be selected and arranged to selectively impart properties such as light weight, durability, air permeability, wear resistance, flexibility, and comfort. Upper <NUM> may define an opening <NUM> through which a foot of a wearer may be received into the interior void.

In different embodiments, at least a portion of sole structure <NUM> may be fixedly attached to upper <NUM> (for example, with adhesive, stitching, welding, or other suitable techniques) and may have a configuration that extends between upper <NUM> and the ground. Sole structure <NUM> may include provisions for attenuating ground reaction forces (that is, cushioning and stabilizing the foot during vertical and horizontal loading). In addition, sole structure <NUM> may be configured to provide traction, impart stability, and control or limit various foot motions, such as pronation, supination, or other motions.

In some embodiments, sole structure <NUM> may be configured to provide traction for first article <NUM>. In addition to providing traction, sole structure <NUM> may attenuate ground reaction forces when compressed between the foot and the ground during walking, running, or other ambulatory activities. The configuration of sole structure <NUM> may vary significantly in different embodiments to include a variety of conventional or non-conventional structures. In some cases, the configuration of sole structure <NUM> can be configured according to one or more types of ground surfaces on which sole structure <NUM> may be used.

For example, the disclosed concepts may be applicable to footwear configured for use on any of a variety of surfaces, including indoor surfaces or outdoor surfaces. The configuration of sole structure <NUM> may vary based on the properties and conditions of the surfaces on which first article <NUM> is anticipated to be used. For example, sole structure <NUM> may vary depending on whether the surface is harder or softer. In addition, sole structure <NUM> may be tailored for use in wet or dry conditions.

In some embodiments, sole structure <NUM> may be configured for a particularly specialized surface or condition. The proposed footwear upper construction may be applicable to any kind of footwear, such as basketball, soccer, football, and other athletic activities. Accordingly, in some embodiments, sole structure <NUM> may be configured to provide traction and stability on hard indoor surfaces (such as hardwood), soft, natural turf surfaces, or on hard, artificial turf surfaces. In some embodiments, sole structure <NUM> may be configured for use on multiple different surfaces.

As will be discussed further below, in different embodiments, sole structure <NUM> may include different components. In some embodiments, sole structure <NUM> may include multiple components, which may individually or collectively provide first article <NUM> with a number of attributes, such as support, rigidity, flexibility, stability, cushioning, comfort, reduced weight, or other attributes. In some embodiments, sole structure <NUM> may include an insole/sockliner, a cushioning layer, a midsole, and an outer sole member ("outsole") <NUM>, which may have an exposed, ground-contacting lower surface. In some cases, however, one or more of these components may be omitted. In one embodiment, sole structure <NUM> may comprise a sole plate <NUM>, as will be further discussed below.

Furthermore, in some embodiments, an insole may be disposed in the void defined by upper <NUM>. The insole may extend through each of forefoot region <NUM>, midfoot region <NUM>, and heel region <NUM>, and between lateral side <NUM> and medial side <NUM> of first article <NUM>. The insole may be formed of a deformable (for example, compressible) material, such as polyurethane foams, or other polymer foam materials. Accordingly, the insole may, by virtue of its compressibility, provide cushioning, and may also conform to the foot in order to provide comfort, support, and stability.

In some embodiments, a midsole <NUM> may be fixedly attached to a lower area of upper <NUM> (for example, through stitching, adhesive bonding, thermal bonding (such as welding), or other techniques), or may be integral with upper <NUM>. Midsole <NUM> may be formed from any suitable material having the properties described above, according to the activity for which first article <NUM> is intended. In some embodiments, midsole <NUM> may include a foamed polymer material, such as polyurethane (PU), ethyl vinyl acetate (EVA), or any other suitable material that operates to attenuate ground reaction forces as sole structure <NUM> contacts the ground during walking, running, or other ambulatory activities. In cases where midsole <NUM> has regions that are exposed along the exterior of the article, materials can be adjusted to provide greater resilience and structural support.

Furthermore, as shown in <FIG>, first article <NUM> may include a tongue <NUM>, which may be provided near or along a throat opening <NUM>. In some embodiments, tongue <NUM> may be provided in or near an instep region of first article <NUM>. However, in other embodiments, tongue <NUM> may be disposed along other portions of an article of footwear, or an article may not include a tongue. In addition, in some cases, sole structure <NUM> can include one or more cleat members or traction elements that are configured to increase traction with a ground surface.

As noted above, in different embodiments, first article <NUM> may include tensioning system <NUM>. Tensioning system <NUM> may comprise various components and systems for adjusting the size of opening <NUM> leading to an interior void and tightening (or loosening) upper <NUM> around a wearer's foot. Some examples of different tensioning systems that can be used are disclosed in <CIT>, (previously <CIT>) and entitled "Motorized Tensioning System with Sensors" and <CIT> (previously <CIT>) and entitled "Article of Footwear with Lighting System,".

In some embodiments, tensioning system <NUM> may comprise one or more laces, as well as a motorized tensioning device. A lace may be configured to pass through various lacing guides <NUM> in some embodiments, which may be further associated with the edges of throat opening <NUM>. In some cases, lacing guides <NUM> may provide a similar function to traditional eyelets on uppers. In particular, as a lace is pulled or tensioned, throat opening <NUM> may generally constrict so that upper <NUM> is tightened around a foot.

The arrangement of lacing guides <NUM> in the figures is only intended to be exemplary, and it will be understood that other embodiments are not limited to a particular configuration for lacing guides <NUM>. Furthermore, the particular types of lacing guides <NUM> illustrated in the embodiments are also exemplary, and other embodiments may incorporate any other kinds of lacing guides or similar lacing provisions. In some other embodiments, for example, laces could be inserted through traditional eyelets. Some examples of lace guiding provisions that may be incorporated into the embodiments are disclosed in <CIT> and entitled "Lace Guide,". Additional examples are disclosed in <CIT> and entitled "Reel Based Lacing System,". Still an additional example of lace guides is disclosed in<CIT> and entitled "Guides For Lacing Systems".

Thus, in some embodiments, a lace may be passed through lacing guides <NUM>. In other embodiments, a lace may pass through internal channels within upper <NUM> after entering channel openings that are near lacing guides <NUM>. In some embodiments, internal channels extend around the sides of upper <NUM> and guide the lace toward a motorized tensioning device disposed in sole structure <NUM>. In some cases, the motorized tensioning device may include provisions for receiving portions of a lace. In some cases, end portions of the lace can exit internal channels of upper <NUM> and can pass through apertures in a housing unit that contains a motorized tensioning device.

In some embodiments, a motorized tensioning device may generally be configured to automatically apply tension to a lace for purposes of tightening and loosening upper <NUM>. A motorized tensioning device may thus include provisions for winding a lace onto, and unwinding a lace from, a spool internal to the motorized tensioning device. Moreover, the provisions may include an electric motor that automatically winds and unwinds the spool in response to various inputs or controls.

In <FIG>, a bottom view <NUM> of first article <NUM> is also depicted near first article <NUM>. Bottom view <NUM> includes a magnified view of outsole <NUM> and sole plate <NUM>. Sole structure <NUM> includes outsole <NUM> joined to midsole <NUM>, where midsole <NUM> is joined to or is disposed adjacent to sole plate <NUM>. In different embodiments, outsole <NUM> may include a shape and size substantially similar to that of at least a portion of midsole <NUM>. For example, in <FIG>, it can be seen that outsole <NUM> extends over and covers a large portion of midsole <NUM>. In other embodiments, outsole <NUM> may comprise a different shape or size. In one embodiment, outsole <NUM> may cover a smaller portion of midsole <NUM> than depicted here. In other embodiments, outsole <NUM> may be substantially larger than midsole <NUM>.

For purposes of reference, the regions of overlap between outsole <NUM> and midsole <NUM> may be divided into a first portion <NUM>, a bridge portion <NUM>, and a second portion <NUM>. In different embodiments, the shape of these portions can vary. In one embodiment, first portion <NUM> may resemble a generally elliptical or oval shape that is joined to an oblong rectangular-shaped second portion <NUM>, where first portion <NUM> and second portion <NUM> are joined along a substantially rectangular-shaped bridge portion <NUM>. Bridge portion <NUM> may be narrow relative to either first portion <NUM> or second portion <NUM>. In other embodiments, the perimeter and shape of different portions of outsole <NUM> and midsole <NUM> may vary from what is depicted here, and include any regular or irregular shape.

Referring specifically to bridge portion <NUM> in <FIG>, it may be noted that relative to a central longitudinal axis <NUM>, bridge portion <NUM> can be disposed further toward one side versus another side. In <FIG>, bridge portion <NUM> is arranged such that it is disposed along medial side <NUM> of sole structure <NUM>. In other words, if it is understood that central longitudinal axis <NUM> represents a longitudinal midline of midsole <NUM>, bridge portion <NUM> may be laterally offset with respect to central longitudinal axis <NUM>. In another embodiment, bridge portion <NUM> may be disposed more centrally and/or extend across both sides of sole structure <NUM>.

As a result of the shape and size of bridge portion <NUM>, two "exposed regions" may be disposed on either side of bridge portion <NUM>. As noted earlier, sole plate <NUM> may be at least partially exposed in the assembled sole structure. Thus, an underside <NUM> of sole plate <NUM> as shown herein can include one or more exposed regions. In <FIG>, sole plate <NUM> includes two exposed regions, here referred to as a first region <NUM> and a second region <NUM>.

In some embodiments, first region <NUM> may encompass or comprise a larger area than second region <NUM>. For example, in <FIG>, first region <NUM> has a first area <NUM> and second region <NUM> has a second area <NUM>, where first area <NUM> is greater than second area <NUM>. In other words, first region <NUM> and second region <NUM> may be asymmetric with respect to their degree of exposure. Thus, underside <NUM> of sole plate <NUM> is asymmetrically exposed, where medial side <NUM> of sole plate <NUM> is less exposed (or is smaller in area) than lateral side <NUM> of sole plate <NUM>. However, it should be understood that in other embodiments, first area <NUM> may be substantially similar to or less than second area <NUM>. For example, medial side <NUM> of sole plate <NUM> can be more exposed (or be larger in area) than lateral side <NUM> of sole plate <NUM> in some embodiments.

In some embodiments, outsole <NUM> may include provisions for storing, securing, holding, or otherwise housing a charging assembly <NUM> within sole structure <NUM>. In one embodiment, charging assembly <NUM> can include one or more components configured to provide various electrical or mechanical functions to first article <NUM>. For example, in <FIG>, charging assembly <NUM> comprises a housing unit ("housing") <NUM>. Housing <NUM> can contain or hold different mechanical or electrical components, such as circuitry, textiles, or other materials. In some embodiments, housing <NUM> may include various mechanisms or components that can be utilized in tensioning system <NUM>. For example, within the interior of housing <NUM> there may be a battery (or other power source), circuitry (or other control mechanism), spools, gears, a motor, light sources, and/or other mechanisms. In one embodiment, housing <NUM> can include an internal charging device <NUM> that may facilitate the charging of tensioning system <NUM> in first article <NUM>. In some embodiments, internal charging device <NUM> can be linked to or otherwise connected to an external charging system (such as charging unit <NUM> of <FIG>) to transfer power to a battery associated with first article <NUM>. In one embodiment, internal charging device <NUM> can comprise internal inductive loops that can be charged by an inductive charging system. In addition, in some embodiments, housing <NUM> can optionally include a securing element that can facilitate the connection of an external charging component with sole structure <NUM> (see <FIG>). For example, in some embodiments, there may be an attractive or a magnetic component disposed in housing <NUM> that can provide a securing mechanism with an external charging component, as will be discussed further below.

Furthermore, first article <NUM> may include provisions for detecting various changes in first article <NUM> or for the detection of connections of first article <NUM> to other external components. For example, some embodiments of first article <NUM> may utilize various kinds of devices for sending commands to the motorized tensioning system or other systems associated with first article <NUM>. In some embodiments, first article <NUM> can incorporate one or more sensors for providing information to a motorized tensioning system that can trigger or initiate various commands. As one example, pressure sensors could be used under the insoles of an article to indicate when the user is standing. In another embodiment, a motorized tensioning system can be programmed to automatically loosen the tension of the lace when the user moves from the standing position to a sitting position, a movement detected by the use of a sensor. In other embodiments, various features of a motorized tensioning system may turn on or off, or adjust the tension of a lace, in response to information from a sensor. However, in other embodiments, it will be understood that the use of any sensor may be optional.

In different embodiments, the sensors providing information might include, but are not limited to, pressure sensors in shoe insoles to detect standing and/or rate of motion, bend indicators, strain gauges, gyroscopes, and accelerometers. In some embodiments, instead of, or in addition to, maintaining an initial tension of the laces, the sensor information may be used to establish a new target tension. For example, pressure sensors could be used to measure contact pressures of the upper of an article of footwear against the foot of a wearer and automatically adjust to achieve a desired pressure.

Thus, housing <NUM> may include a sensor in some embodiments. In different embodiments, as will be discussed further below with respect to <FIG> and <FIG>, a sensor may detect and measure a relative change with respect to a connection that is created between charging assembly <NUM> and a component of the charging system. For purposes of this disclosure, the use of the term "connect" or "connection" in the context of the charging system, charging assembly and/or charging unit should be understood to mean a link that occurs between two devices or components that facilitates access or communication of a transfer of power or information related to the charging process. The link may occur as a result of the physical contact between two surfaces, but it may also be created through wireless signals or signals that do not require physical contact. The use of sensors will be discussed further with respect to <FIG> and <FIG>.

Thus, in different embodiments, first article <NUM> can be configured for use with an external charging unit. In some embodiments, the dimensions of the exposed regions of sole plate <NUM> (i.e., first region <NUM> or second region <NUM>) may facilitate a connection with an external charging unit. Furthermore, sole structure <NUM> can include a recess <NUM> that is dimensioned to receive a portion of an external charging unit in different embodiments. In some embodiments, recess <NUM> can be formed or defined by portions of the surfaces of underside <NUM> of sole plate <NUM>, outsole <NUM>, and midsole <NUM>. Recess <NUM> can have a first volume that is configured to receive, enclose, contain, or otherwise hold a portion of another device or component, as will be discussed further below. In addition, as will be discussed with respect to <FIG>, the height of recess <NUM> can vary.

As noted above with respect to <FIG>, in different embodiments, charging system <NUM> may include charging unit <NUM> comprising first component <NUM> and second component <NUM>. In some cases, charging unit <NUM> may facilitate the transfer of power to one or more articles of footwear. In other words, charging unit <NUM> may comprise a charging station and be configured to provide the functions of a charging system, as described above with respect to <FIG>. Referring now to <FIG>, in some embodiments, charging unit <NUM> may include provisions for transferring power to one or more articles of footwear. In some embodiments, a charging unit can include a central processing unit (CPU) of some kind. In other embodiments, a charging unit could comprise a simple circuit of some kind for receiving electrical inputs and providing an electrical output according to the inputs. In one embodiment, a charging unit may include a printed circuit board. Thus, in some cases, a charging unit may include a number of ports that facilitate the input and output of information and power. The term "port" means any interface or shared boundary between two conductors for purposes of this disclosure. In some cases, ports can facilitate the insertion and removal of conductors. Examples of these types of ports include mechanical connectors. In other cases, ports are interfaces that generally do not provide easy insertion or removal. Examples of these types of ports include soldering or electron traces on circuit boards. In one embodiment, the charging unit can include one or more ports configured to transfer power to an external inductive loop. It should be understood that the reference to an external inductive loop is with respect to an inductive loop that is external to an article of footwear. In other words, an external inductive loop may be enclosed or housed within a structure. For example, an external inductive loop can be disposed within a portion of first component <NUM> and/or second component <NUM>, or some other portion of charging system <NUM>. In some embodiments, an external inductive loop may be associated with an internal inductive loop of a corresponding article of footwear.

Thus, in different embodiments, external charging unit <NUM> that is utilized in charging system <NUM> may be configured for use with first article <NUM>. In some embodiments, charging unit <NUM> can include components that are dimensioned to be connected to first article <NUM>. For example, in one embodiment, one or more components of charging unit <NUM> can be dimensioned to be received by a portion of sole structure <NUM> (see <FIG>). In particular, in some cases, a component can be dimensioned to fit or be received by recess <NUM> in sole structure <NUM> (see <FIG>).

For purposes of illustration, the discussion herein will focus on first component <NUM>. However, it should be understood that features and descriptions provided regarding first component <NUM> may be generally applicable to second component <NUM> in some embodiments. To better illustrate an embodiment of first component <NUM> for the reader, an isometric magnified view <NUM> of first component <NUM> is included in <FIG>.

First component <NUM> may have a housing structure that can comprise different shapes in different embodiments. In some embodiments, first component <NUM> may comprise a generally cylindrical geometry, including a top portion <NUM> associated with a top side, and a base portion <NUM> associated with a bottom side, as well as a continuous, curved surface <NUM> extending between top portion <NUM> and base portion <NUM>. Top portion <NUM> and base portion <NUM> are depicted as generally circular in <FIG>. However, in other embodiments, the dimensions and/or shape of top portion <NUM>, base portion <NUM>, and/or curved surface <NUM> may differ, including but not limited to oblong, triangular, square, rectangular, oval, elliptical, or other regular or irregular shapes. Thus, in different embodiments, first component <NUM> can have a spherical, prism, cone, pyramidal, cuboid, or other regular or irregular geometry. In some embodiments, the geometry of first component <NUM> or the shapes of one or more of its surfaces may be configured to correspond or match with a portion of first article <NUM>, as will be discussed further below.

In different embodiments, the texture of the outer surfaces comprising first component <NUM> may be smooth or generally untextured surfaces. However, in other embodiments, some surfaces can exhibit textures or other surface characteristics, such as dimpling, protrusions, ribs, ridges, securing elements, nubs, or various patterns, for example. In some cases, first component <NUM> can include one or more locating or structural features to facilitate alignment of first component <NUM> within charging system <NUM>. In particular, in embodiments using an inductive charging system, it may be necessary to ensure proper alignment of internal inductive loops disposed within each article with any external inductive loops disposed in charging unit <NUM>.

It should be understood that in other embodiments, other types of locating features may be used. For example, in some cases, top portion <NUM> can be configured with recesses that engage protrusions located on bottom surfaces of first region <NUM> of sole plate <NUM> (see <FIG>). In other cases, top portion <NUM> can be configured with protrusions that engage recesses located on bottom surfaces of first region <NUM> of sole plate <NUM> (see <FIG>). In still other embodiments, other types of locating features that are known in the art can be used. With these arrangements, an article can be maintained in a predetermined location with respect to first component <NUM>. In particular, articles may be positioned in a manner that orients any internal inductive loops with any external inductive loops disposed within first component <NUM>. However, in some embodiments, top portion <NUM> does not include locating features, and may be substantially smooth or flat.

In addition, different surfaces of first component <NUM> may comprise varying dimensions in some embodiments. In the embodiment of <FIG>, it can be seen that top portion <NUM> has a third area <NUM> defined by a substantially round perimeter (or circumference). In the embodiments depicted herein, base portion <NUM> may have a substantially similar area to top portion <NUM>. However, in other embodiments, top portion <NUM> may have a different sized area than base portion <NUM>.

In addition, in some cases, the dimensions of first component <NUM> may be configured to accommodate a corresponding portion in an article of footwear, as noted above. In some embodiments, third area <NUM> may be substantially similar to or less that first area <NUM> (shown in <FIG>). In other words, third area <NUM> may be the same or smaller than the exposed first region <NUM> of sole plate <NUM> in <FIG>. In one embodiment, this may allow top portion <NUM> of first component <NUM> to be disposed flush against the surface of first region <NUM>, as will be discussed in <FIG>.

Furthermore, first component <NUM> may include a second volume that can be substantially similar to or less that the first volume of recess <NUM> (shown in <FIG>) in different embodiments. In other words, the second volume of first component <NUM> may be the same or smaller than the first volume associated with recess <NUM> of sole plate <NUM> in <FIG>. In some embodiments, this can allow first component <NUM> to be disposed fully within the space bounded by recess <NUM>, as will be discussed in <FIG>.

The interior of first component <NUM> may include different elements in various embodiments. For example, first component <NUM> (which comprises the housing that is generally defined by the various outer surfaces that have been described above) can encase one or more inductive loops, circuitry, wiring, or other charging components. Furthermore, as will be discussed below with respect to <FIG>, first component <NUM> can include a region or component that has a greater degree of magnetic attraction, such as a ferromagnetic material that can be disposed along the outer surface of first component <NUM>, or in the interior of first component <NUM>.

In some embodiments, top portion <NUM> and base portion <NUM> comprise substantially similar materials. In other embodiments, top portion <NUM> and base portion <NUM> can differ. For example, top portion <NUM> may include a region configured to improve or facilitate a connection to a sole structure. In addition, in one embodiment, base portion <NUM> may be generally smooth and/or flat. However, in other embodiments, base portion <NUM> may comprise undulations or bumps, or other types of texturing. In some cases, there may be traction elements disposed along base portion <NUM> to help anchor or secure first component <NUM>, for example. Thus, in some embodiments, base portion <NUM> can include provisions for stability or grip on a ground surface.

Although the current embodiment generally describes an external inductive loop disposed in first component <NUM> of charging unit <NUM>, other embodiments can include external inductive loops disposed in other portions of charging unit <NUM>. Furthermore, while the current embodiment includes internal inductive loops disposed in a sole structure of an article of footwear, in other embodiments an internal inductive loop could be disposed in any other portion of an article of footwear. Examples of other portions that could house an internal inductive loop include, but are not limited to, a tongue, an upper sidewall, a forefoot portion of an upper, a heel portion of an upper, as well as any other portion of an article of footwear. In some embodiments, the location of an internal inductive loop in an article of footwear can be selected according to the location of an external inductive loop in a charging unit so that the internal inductive loop can be readily arranged adjacent to the external inductive loop when the article is inserted onto or placed adjacent to the charging unit, allowing inductive coupling (i.e., charging in an inductive based charging system) to occur.

Furthermore, in some embodiments, the outer housing associated with charging devices and charging components or other components of the charging system can be formed of various materials. In some embodiments, first component <NUM> can comprise different plastics, polymers, thermoplastic polyurethane (TPU), nylon, glass, carbon fiber, carbon composites, or other types of materials. In some embodiments, portions of a charging component may comprise a light-diffusive material.

As described above with respect to <FIG>, charging unit <NUM> can include power cord <NUM> that is configured to receive power from an external power source. In different embodiments, first component <NUM> and/or second component <NUM> of charging unit <NUM> may be connected with, integral with, or fixedly attached to a first cable line <NUM> that is part of power cord <NUM>, as shown in <FIG>. For example, in one embodiment, first component <NUM> can contact, link, join, or be otherwise attached to first cable line <NUM>. In some cases, first component <NUM> can include a port that connects first component <NUM> with first cable line <NUM>. In different embodiments, the various portions of power cord <NUM> may comprise different lengths, dimensions, materials, and configurations, including any cables or cords known in the art. For example, in one embodiment, power cord <NUM> can comprise a Y-type cable, as shown in <FIG>. In other words, there may be first cable line <NUM> extending from first component <NUM> and a second cable line <NUM> extending from second component <NUM>. First cable line <NUM> and second cable line <NUM> can join at a central region <NUM>, and extend toward a power adaptor <NUM> along a central cable line <NUM>. Thus, in some embodiments, first component <NUM> and second component <NUM> may be configured to be moved or arranged independently of one another. In addition, first component <NUM> can be utilized by an article of footwear without a concurrent use of second component <NUM>, for example.

As noted above, various portions of charging system <NUM> (see <FIG>) can be configured to accommodate or connect to one another. For example, as described with reference to <FIG> and <FIG>, first component <NUM> and recess <NUM> may have dimensions that complement each other and facilitate the connection of first component <NUM> with charging assembly <NUM>. In addition, in some embodiments, recess <NUM> can have a first volume that is greater than or substantially similar to the second volume of first component <NUM>; similarly, first region <NUM> of recess <NUM> can have first area <NUM> that is greater to or substantially similar to third area <NUM> (see <FIG> and <FIG>).

Referring now to <FIG>, upper <NUM> and portions of sole structure <NUM> of first article <NUM> are shown in dotted line to reveal the dimensions of recess <NUM> relative to first component <NUM>. First component <NUM> has a thickness <NUM> that extends between top portion <NUM> and base portion <NUM>. Thickness <NUM> also generally corresponds to the width of curved surface <NUM> in <FIG>. Similarly, recess <NUM> in sole structure <NUM> has a height <NUM>. As shown in <FIG>, in one embodiment, thickness <NUM> may be less than height <NUM>. This difference in thickness can facilitate the link or association between first component <NUM> and an article of footwear in some embodiments, as will be discussed below. However, in other embodiments, thickness <NUM> may be substantially similar to height <NUM> or larger than height <NUM>.

In one embodiment, thickness <NUM> may be generally consistent throughout first component <NUM>, and height <NUM> may be generally consistent throughout recess <NUM>. However, in other embodiments, there may be irregularities throughout first component <NUM> and/or sole structure <NUM>, such that the thicknesses or height are not consistent. For example, in embodiments where first component <NUM> includes ridges or other irregularities along top portion <NUM>, there may be corresponding irregularities in the thickness of first component. In such cases, thickness <NUM> may be understood to represent the maximum thickness of first component <NUM>.

In some embodiments, due to the difference between thickness <NUM> and height <NUM> (as shown in <FIG>), the upper surface of recess <NUM> (associated with the underside of sole plate <NUM> in first region <NUM>, as shown in <FIG>) may be spaced apart from top portion <NUM> of first component <NUM>, such that there is no physical contact between the two surfaces. In other embodiments, due to the close or substantially similar value of height <NUM> and thickness <NUM>, the upper surface of recess <NUM> may contact or press against the surface of top portion <NUM> of first component <NUM>.

Thus, the various and dimensions of first component <NUM> sole structure <NUM> relative to one another can allow different surfaces associated with each to press or contact against each other. These correlations of dimension may permit first component <NUM> to more snugly join and/or be lodged within recess <NUM> formed along sole structure <NUM>. However, in other embodiments, thickness <NUM> and height <NUM> may differ, and the two portions may be joined together in a different way.

Furthermore, in some embodiments, recess <NUM> can also accommodate an extemal charging component while ensuring first article <NUM> remains in a substantially normal position when disposed over the charging component. As described above, in some embodiments, the height of recess <NUM> may be greater than or substantially similar to the thickness of first charging component <NUM>. In some cases, this can allow the bottom surface (e.g., outsole <NUM>) of first article <NUM> to be generally flush or lie substantially flat against an indoor or outdoor ground surface when first article <NUM> is disposed over the charging component. This substantially level accommodation of the charging component may increase the ease-of-use, stability, and comfort during use of first article <NUM> with the charging system.

Referring now to <FIG>, an isometric view of pair <NUM>, including first article <NUM> and second article <NUM>, is illustrated adjacent to charging unit <NUM> that comprises first component <NUM> and second component <NUM>. Power cord <NUM> of charging unit <NUM> is connected to a power source <NUM>, allowing charging unit <NUM> to be activated and ready to receive pair <NUM>. Dotted lines are included to represent an embodiment of a manner in which pair <NUM> may be subsequently aligned and positioned with respect to charging unit <NUM>. As noted previously in <FIG>, first article <NUM> can include midsole <NUM> and outsole <NUM>. Furthermore, midsole <NUM> can be disposed adjacent to sole plate <NUM>. Sole plate <NUM> includes a portion along midfoot region <NUM> that is an exposed outer surface (associated with first region <NUM> and second region <NUM> of <FIG>). In <FIG>, it can be seen that first article <NUM> has a first recess <NUM> and second article <NUM> has a second recess <NUM>, which are each substantially similar to recess <NUM> discussed previously with respect to <FIG>.

As discussed above, in some embodiments, the correspondence between each of the two components of charging unit <NUM> and each of the recesses of pair <NUM> may allow the two surfaces to readily contact or adjoin one another. <FIG> depicts one embodiment of the manner in which both articles can be positioned with first component <NUM> and second component <NUM>. In some embodiments, first article <NUM> may be mounted on either first component <NUM> or second component <NUM>, and second article <NUM> may be mounted with either first component <NUM> or second component <NUM>. However, in other embodiments, each component may be configured for use with only one article of pair <NUM>.

In some embodiments, electricity received at an external power source can be transferred to the charging unit via power cord <NUM>. In one embodiment, the electricity can then be transferred to an external inductive loop <NUM> disposed within first component <NUM>. By using an external power source with an alternating current, power can be inductively transferred between the external inductive loop and the internal inductive loops of internal charging device <NUM> disposed in charging assembly <NUM> of sole structure <NUM>. In particular, an alternating magnetic field can be created around the external inductive loop, which can induce a current in the corresponding internal inductive loop. This arrangement allows power to be transferred to a rechargeable power source, such as a battery, that may be disposed within first article <NUM>, which can provide power for an automatic tensioning system.

It should be understood that the charging system described herein may differ in other ways. For example, the charging system of the present disclosure may include features of charging systems disclosed in Beers et al. , <CIT> (previously <CIT>) and entitled "Charging System for an Article of Footwear,".

Referring now to <FIG>, in different embodiments, charging unit <NUM> may be configured for use with pair <NUM>. For purposes of illustration, the discussion herein will focus on first component <NUM> and first article <NUM>. However, it should be understood that features and descriptions provided regarding first component <NUM> and first article <NUM> (as well as components associated with first article <NUM>) may be generally applicable to second component <NUM> and second article <NUM> in different embodiments.

In <FIG>, an isometric bottom view of first article <NUM> is shown as first component <NUM> is mounted or installed. Thus, a portion of the exposed surface of first region <NUM> of sole plate <NUM> (as shown in <FIG>) can be positioned such that it is disposed adjacent to top portion <NUM> of first component <NUM>. In one embodiment, first component <NUM> can be received by recess <NUM> such that a portion of curved surface <NUM> can press or contact a side surface <NUM> of midsole <NUM>. Furthermore, in some embodiments, the curvature of curved surface <NUM> may be substantially similar to the curvature of side surface <NUM> and improve the fit between the surfaces. In other words, the angle associated with the curve of side surface <NUM> may be substantially similar to the angle associated with the curve of curved surface <NUM>. These types of correlations may permit first component <NUM> to more snugly join and/or be lodged or pressed against the surfaces comprising recess <NUM>. However, in other embodiments, first component <NUM> and recess <NUM> may differ, and the two portions may be joined together in a different way. In particular, first article <NUM> may be positioned in a manner that orients any internal inductive loops with any external inductive loops disposed within first component <NUM>.

As noted previously, with these arrangements, each article can be maintained in a predetermined location with respect to its charging units during charging, which is especially beneficial in embodiments that incorporate an inductive charging system. In order to facilitate the connection between first component <NUM> and first article <NUM>, there may be additional provisions included in some embodiments. In different embodiments, various types of securing elements may be incorporated in article <NUM>. Some of the embodiments disclosed herein may include one or more securing elements that can facilitate the connection between an article of footwear and a charging unit.

Referring to <FIG>, it can be seen that in some embodiments, securing element(s) may comprise a magnetic fastener or magnetic securing system. For example, in some embodiments, there may be magnetic materials incorporated into one or both of the articles of footwear and the charging unit. In some cases, the magnetic materials can correspond in position to the desired placement or positioning of the charging component relative to the sole structure. For example, in some cases, inductive loops disposed in first article <NUM> can be positioned to facilitate the charging of components if an inductive charging system is being used. Thus, in some embodiments, charging system <NUM> may include provisions to facilitate the alignment of internal inductive loops disposed within each article with any external inductive loops disposed in the charging unit. In some embodiments, "magnetic securing elements" can be utilized to help ensure the proper position of the charging component with the exposed surface of the sole structure comprising charging assembly <NUM>.

In some embodiments, the securing elements can attract one another, depending upon their relative polarities. In one embodiment, there may be a magnetic coupling system included in charging system <NUM> with a first magnetic securing element ("first element") <NUM>. One example of a magnetic coupling system is shown in the embodiments of <FIG>. In some cases, a ferromagnetic material (first element <NUM>) can be provided within or adjacent to housing <NUM> of the charging assembly. Where the ferromagnetic material is formed as part of the material of housing <NUM>, there need not be additional magnetically attractive materials in the sole structure, as housing <NUM> itself can attract a corresponding magnetic securing element. However, in some embodiments, there can instead (or also) be a ferromagnetic element (first element <NUM>) that is disposed directly above first region <NUM> in sole structure <NUM>. As one example, first element <NUM> can be a flat piece of metal inserted in housing <NUM> that may facilitate or strengthen the attachment of the charging component to the sole structure. In such cases, the metal piece comprising first element <NUM> can be made of a magnetically attractive material so as to enhance its ability to attract any magnet in the charging component (discussed below).

In some embodiments, there may be a second magnetic securing element ("second element") <NUM> disposed within or adjacent to first component <NUM>. In some cases, second element <NUM> comprises a magnet-type material. Where the magnet is formed as part of the material of forming the structure of first component <NUM>, there need not be additional magnetic components in first component <NUM>. However, in some embodiments, there can instead (or also) be a magnetic element (second element <NUM>) that is disposed within first component <NUM>. As one example, second element <NUM> can be a magnet formed along the surface of first component <NUM> that may be attracted to ferromagnetic materials (such as first element <NUM>).

In some embodiments, the charging component(s) and/or any associated magnets can be coated with a water-insulating material like rubber to protect it from everyday use in which an article of footwear may be dirty or covered with residual particles. In addition, the charging component(s) and magnetic portions can undergo oxidation to provide a water-insulating layer on the component.

In different embodiments, the size and/or weight of a magnetic securing element as discussed with respect to second element <NUM> should be such that it does not make the charging component too heavy but is nevertheless sufficiently strong in terms of its magnetic power so as to enable the charging component to be readily attracted to the article of footwear. In addition, in some embodiments, the magnetic attraction should be sufficient so that as a user subsequently removes his or her foot from the article of footwear, the connection is not displaced or interrupted (unless that is the intention of the user).

Attractive magnetic field <NUM> is schematically represented by a series of rings surrounding the illustration of first component <NUM> in <FIG>. Thus, when first element <NUM> is brought in proximity of second element <NUM>, attractive magnetic field <NUM> may draw both portions toward one another, and/or generate a pulling force. Once the two portions are brought close enough to one another, the two elements can be pulled and held together securely by an attractive force, allowing for a magnetic connective force. In some cases, the magnetic connection is supplemented by different securing mechanisms, which can securely fix first element <NUM> alongside second element <NUM>. Thus, even though first element <NUM> and second element <NUM> may not directly (i.e., physically) contact one another in some embodiments, they may nevertheless be securely and removably attached to one another through the proximity of first article <NUM> to first component <NUM>. In one embodiment, a user may facilitate the coupling by stepping or moving toward charging component <NUM> while wearing first article <NUM>, as shown in <FIG>.

Referring now to <FIG> and <FIG>, a schematic view of an embodiment of two states associated with automated tensioning system <NUM> is depicted. In <FIG>, first article <NUM> is shown in a laced state <NUM>, and in <FIG>, first article <NUM> is shown in a fully unlaced state ("unlaced state") <NUM>. In terms of automated tensioning system <NUM>, unlaced state <NUM> represents a specific condition in which the article of footwear is fully unlaced (as loose as the system is configured to allow the article to become). In other embodiments, unlaced state <NUM> may also represent a level of tension in which the system recognizes that the article of footwear is loosened to a particular level of tension or tightness that is preset by the system or desired by the user. In other words, unlaced state <NUM> need not only represent the "fully unlaced" condition of the article of footwear, and may also be associated with a minimal amount of tension of the lacing system.

Furthermore, in some embodiments, laced state <NUM> can represent a specific condition in which the system recognizes that the article of footwear is fully laced (as tightly as the system has been configured to allow the article to become). However, in some cases, laced state <NUM> may also represent a condition in which the system recognizes that the article of footwear is laced to a particular level of tension or tightness that is desired by the user or preset by the system. In other words, laced state <NUM> need not represent the "fully laced" condition of the article of footwear, and may also be associated with only a minimal amount of tension of the lacing system. However, laced state <NUM> is understood to be a greater tension level than unlaced state <NUM>. In some embodiments, laced state <NUM> can comprise all levels of tension associated with the automated tensioning system that are greater than the tension level of unlaced state unlaced state <NUM>.

As mentioned earlier, in some embodiments, different states or functions may be triggered by the activation of a sensor. In some embodiments, an auto-unlacing process may be initiated by the activation of a first sensor <NUM>. In some embodiments, first sensor <NUM> may be disposed in an article of footwear. In some embodiments, first sensor <NUM> can comprise a component that detects changes in magnetic forces, changes in infrared radiation, microwaves, or ultrasonics, contact with a particular surface, and/or proximity to another component. In other embodiments, first sensor <NUM> can include a capacitive sensor or capacitive displacement sensor, a sensor based on the Doppler effect, an inductive sensor, an optical sensor, radar, sonar, or a fiber optics sensor. Other embodiments may include any type of sensors that can detect a connection between two components.

In some embodiments, as depicted in the magnified views of <FIG> and <FIG>, first sensor <NUM> may be disposed in midfoot region <NUM> of first article <NUM>. In one embodiment, first sensor <NUM> can be located within or adjacent to housing <NUM> of charging assembly <NUM>. However, in other embodiments, first sensor <NUM> can be located anywhere in first article <NUM> or in the charging unit itself. In some embodiments, a portion of first sensor <NUM> may be disposed in the charging unit and a portion of first sensor <NUM> may be disposed in first article <NUM>.

Referring to <FIG>, as first article <NUM> is not yet connected to first component <NUM>, first sensor <NUM> is not engaged or activated. In this case, first article <NUM> is shown in laced state <NUM> (see a first lacing region view <NUM>). However, as shown in subsequent <FIG>, when first article <NUM> is connected with first component <NUM>, first sensor <NUM> can become activated in some embodiments. In some embodiments, the engagement of first sensor <NUM> can initiate a series of events in the article of footwear and lead to a change in the state of automated tensioning system <NUM>. In one embodiment, the activation or engagement of first sensor <NUM> initiates a process whereby first article <NUM> can transition from laced state <NUM> (see <FIG>) to unlaced state <NUM> (shown in second lacing region view <NUM>). Thus, in some embodiments, the engagement of first sensor <NUM> may inform tensioning system <NUM> that first article <NUM> is now connected to a charging device, and an auto-unlacing process (depicted in <FIG> with arrows) of first article <NUM> should occur.

The decrease in tension of first article <NUM> can allow a foot to be more readily removed from first article <NUM> in different embodiments. In <FIG>, a foot <NUM> is shown as it is being removed from first article <NUM>. First article <NUM> is connected to first component <NUM> and, as discussed above with respect to <FIG> and <FIG>, first article <NUM> is in unlaced state <NUM>. In some embodiments, unlaced state <NUM> may facilitate the removal of foot <NUM> from first article <NUM> by allowing foot <NUM> to be removed without additional interaction or adjustment of first article <NUM> by a user. However, in other embodiments, a user may hold first article <NUM> while removing foot <NUM> from first article <NUM>. <FIG> shows the full removal of foot <NUM> from first article <NUM>, where first article <NUM> remains connected to first component <NUM>. Thus, in some embodiments, during the foot removal process, first article <NUM> can be connected to the charging unit. In one embodiment, first article <NUM> can charge while foot <NUM> is removed from first article <NUM>.

It should be understood that the embodiments of the charging system depicted herein may be used in different ways. For purposes of illustration, <FIG> provides a flow chart depicting one process of controlling an article of footwear, where the article of footwear includes an upper, a sole structure, an interior cavity, an automated tensioning system, a battery, a charging assembly, and a sensor. The article of footwear can receive information from a sensor in a first step <NUM>. In one embodiment, the method of controlling the article of footwear can include a second step <NUM> of determining whether the charging assembly is connected to the external charging device. Furthermore, a third step <NUM> can comprise automatically loosening the article of footwear through an operation of the automated tensioning system if the sensor determines that the charging assembly is connected to the external charging device. In addition, a fourth step <NUM> comprises making no adjustments to the tensioning system based on the sensor information if the sensor does not determine that the charging assembly is connected to the external charging device.

In other embodiments, one article or a pair of footwear can be charged and then removed to permit the charging of additional (different) pairs of footwear with the same charging unit. Furthermore, additional embodiments can further comprise the step of determining if the battery is charged. In another embodiment, an additional step can comprise determining if a foot is disposed in the interior cavity of the article of footwear. In some embodiments, another step can include automatically tightening the article of footwear through an operation of the automated tensioning system if the battery is charged and a foot is disposed in the interior cavity. Additional embodiments can comprise inductively charging the article of footwear when the charging assembly is connected to the external charging device.

Furthermore, in another embodiment, second step <NUM> of detecting a connection also includes determining if magnetic coupling has occurred between the charging assembly and the external charging device. In addition, in some embodiments, third step <NUM> of automatically loosening the article of footwear can further include the step of instructing the automated tensioning system to loosen the article of footwear.

As described above, in some embodiments, the external charging unit may include provisions for charging a battery or other power source associated with the article of footwear. <FIG> is one embodiment of the charging process with respect to first article <NUM>. In different embodiments, once a user has connected first article <NUM> to a charging source (here first component <NUM>), the battery associated with first article <NUM> may be charged. In some embodiments, as first article <NUM> is connected to first component <NUM>, the energy level of a battery <NUM> may increase over time. In the illustration of <FIG>, battery <NUM> of first article <NUM> is nearly depleted at the time of the connection, as shown with a first energy level <NUM>. However, in other embodiments, battery <NUM> can be in any other energy state or have any other energy level.

In <FIG>, it can be seen that first article <NUM> remains in unlaced state <NUM> during the charging process. However, in other embodiments, the amount of tension of the article of footwear during charging can vary from that depicted here. Once battery <NUM> is sufficiently charged (for example, the energy level of battery <NUM> is above a certain operating threshold, or battery <NUM> is fully charged), as shown with a second energy level <NUM>, the article may be configured for normal operations. Referring to <FIG> and <FIG>, a user may return to first article <NUM> following a duration of time sufficient to charge the battery for use in normal operation. This duration may vary widely, as, for example, the energy level of the battery can vary at the time the connection between first article <NUM> and first component <NUM> occurs, or the battery model or type may differ in different embodiments. In other embodiments, other features may be configured differently in different embodiments, such that the time required to charge the battery is variable.

In <FIG>, a user is beginning to insert foot <NUM> into first article <NUM> with battery <NUM> at second energy level <NUM>. During this process, first article <NUM> remains connected to charging unit <NUM>. However, it should be understood that in other embodiments, first article <NUM> may be first disconnected from the corresponding charging unit before foot <NUM> is inserted.

As mentioned above, in some embodiments, different states or functions of the automated tensioning system may be triggered by the activation of a sensor. In some embodiments, an autolacing process may be initiated by the activation of a second sensor <NUM> located in the article of footwear. In some embodiments, the sensor can detect changes in pressure. In different embodiments, second sensor <NUM> may detect and measure a relative change in a force or applied load, detect and measure the rate of change in force, identify force thresholds, and/or detect contact and/or touch. In some cases, the sensor may comprise a generally two-dimensional material. In some embodiments, second sensor <NUM> may include a piezoelectric material. In other embodiments, second sensor <NUM> may have different dimensions and/or shapes in different embodiments and be disposed in other regions or portions of first article <NUM> than shown here. In some embodiments, the application of pressure (for example, of a foot being inserted into first article <NUM>) can activate second sensor <NUM>, which in turn can trigger other events, such as autolacing.

In one embodiment, second sensor <NUM> can comprise a force sensitive resistor (FSR). In some cases, as depicted in <FIG>, the FSR (here, second sensor <NUM>) may be located along heel region <NUM> of first article <NUM>. Referring to <FIG>, as a user begins to insert his/her foot <NUM> into first article <NUM>, the FSR has not yet been engaged or activated. Prior to the insertion of foot <NUM>, first article <NUM> may be in unlaced state <NUM>, as shown in third lacing region view <NUM>. However, as shown in subsequent <FIG>, when foot <NUM> is fully inserted into first article <NUM>, such that the heel of foot <NUM> can apply pressure along heel region <NUM>, second sensor <NUM> (shown in <FIG>) can become activated in some embodiments. In one embodiment, when second sensor <NUM> detects a predetermined or preset amount of pressure or weight (i.e., a force), second sensor <NUM> becomes activated. In some embodiments, the engagement of second sensor <NUM> can initiate a series of events and/or cause a change in the state of the automated tensioning system. In one embodiment, the activation or engagement of second sensor <NUM> initiates a process whereby first article <NUM> can transition from unlaced state <NUM> of <FIG> to laced state <NUM> (shown in fourth lacing region view <NUM> in <FIG>). Thus, in some embodiments, the engagement of second sensor <NUM> may inform the system that article <NUM> is now being used or worn by a user, and that an autolacing process (represented by arrows in <FIG>) may occur. In one embodiment, the autolacing process moves the article to laced state <NUM>.

Thus, as shown in <FIG>, in different embodiments, automated tensioning system <NUM> may include provisions to automatically tighten one or more article of footwear. In some embodiments, the automatic tightening is configured to occur once the article detects that a user has resumed the wearing of pair <NUM>, and pair <NUM> is sufficiently charged for normal operations. The autolacing feature may facilitate the use of an article of footwear by allowing a user to rapidly and easily insert a foot into the article of footwear and be automatically fitted (i.e., whereby the tension level of the article is increased to a desired or preset setting) and ready for regular use. In some embodiments, the autolacing process may occur only when the article remains connected to the charger unit and a foot is inserted into the article. In other embodiments, the autolacing can occur when a foot is inserted into the article, regardless of whether the article is still connected to the charger unit. However, in still other embodiments, the insertion of a foot into the article of footwear does not necessarily trigger the autolacing process, and such an operation may be optional.

In some embodiments, in order to detach the external charging component from an article of footwear, a user may simply pull first article <NUM> away from charging component <NUM> until the pulling force exceeds the attractive magnetic force between first element <NUM> and second element <NUM> (see <FIG>). In other embodiments, the system may include an additional device that can be adjusted or manipulated to "unlock" first article <NUM> from charging component <NUM>. For example, there may be a pull tab such as a tensile element, a loop, or a hook that extends from a portion of first article <NUM> and can be grasped by a user and help release first article <NUM> from charging component <NUM>.

It will be understood that the charging system discussed in this detailed description and in the claims can be used independently of a tensioning system. In particular, since the charging system discussed in this detailed description is used to charge a battery of some kind, that battery can be further coupled to one or more different electrical systems. Generally, the charging system discussed in this detailed description and in the claims may be used to power any type of electrical system associated with an article of footwear. For example, in another embodiment, the charging system discussed in this embodiment could be used to charge a battery to power an accelerometer or a sensor for tracking distance and motion. In still another embodiment, the charging system discussed here could be used to power a heating and/or cooling system for an article. Furthermore, it will be understood that the charging system could be used to power two or more electrical systems simultaneously. In addition, the embodiments of the external charging unit as described herein may be utilized with any type or configuration of footwear or article of apparel that have any type of system or mechanism.

In addition, in some embodiments, the charging unit need not be adjusted to accommodate different sizes of footwear. In other words, some or all portions of the charging system, such as the charging unit, can retain their original shape and dimensions and be used with footwear ranging in size from a "child size" to an "adult size. " For example, in some embodiments the charging system can be utilized with footwear ranging between U. standard size <NUM> and larger. In another embodiment, the charging system could be used with footwear ranging from U. standard size <NUM> and <NUM>. In one embodiment, the charging system could be used with footwear ranging from U. standard child size <NUM> to a men's size <NUM> or larger.

Claim 1:
An article of footwear (<NUM>), the article of footwear comprising:
an upper (<NUM>) and a sole structure (<NUM>);
an automated tensioning system (<NUM>) that is configured to adjust a tension level of the article of footwear from a first tension level to a second tension level, wherein the first tension level is greater than the second tension level;
a charging assembly (<NUM>) configured to magnetically couple with an external charging device, the charging assembly comprising:
an internal charging device (<NUM>)
a housing (<NUM>); and
a ferromagnetic material (<NUM>),and
a sensor (<NUM>), arranged to provide information to the automated tensioning system when the charging assembly is connected to the external charging device (<NUM>).