Eyeglass earstem with enhanced performance

An earstem for an eyeglass is provided that can exhibit a dampening effect as the earstem is over-rotated or deflected from a deployed position to a deflected position. In some embodiments, the earstem can comprise a suspension component and a rigid elongate body. The suspension component can be attached to the rigid elongate body along a posterior portion of the suspension component. The rigid elongate body can pivot relative to the frame to a deployed position and further, beyond the deployed position. However, pivoting of the rigid elongate body beyond the deployed position causes deflection of the suspension component, which dampens further pivoting of the rigid elongate body.

BACKGROUND

1. Field of the Inventions

The present inventions relate generally to eyewear and more specifically to earstems and earstem connection systems for eyewear.

2. Description of the Related Art

A wide variety of improvements have been made in recent years in the eyewear field, particularly with respect to eyewear intended for use in active sports or as fashion sunglasses. These eyewear designs accomplish a variety of functional advantages, such as maximizing interception of peripheral light, reducing optical distortion and increasing the wearer's comfort level, compared to previous active sport eyewear.

Eyeglass fit and comfort has been addressed in several ways, including varying eyeglass frame size, minimizing eyeglass weight, modifying the manner in which earstems engage ears of the wearer, and utilizing nosepiece and ear-contacting materials that are comfortable for extended use, to name a few.

Eyeglass fit and comfort has been determined at least in part due to the material of which the eyeglass is made. For example, plastic or injection molded frame eyeglasses are often more flexible than metal frame eyeglasses, and therefore could provide lighter overall weight and greater flexibility than a metal frame eyeglass. Although metal frame eyeglasses have been improved in some ways, such improvements may have only moderately affected the flexibility and fit of eyeglasses. Prior art eyeglass designs do not adjust well over a range of head sizes and shapes.

Moreover, various other improvements have been made to enhance the durability and strength of eyeglasses. For example, various durable eyeglass designs have been developed that enable eyeglasses to be sturdy even during accidents, impact, stress, and other forms of use or misuse. Further, lenses have also been developed that have enhanced ballistic protection. Thus, an eyeglass can be generally resistant to breaking, bending, or otherwise becoming unusable. However, such eyeglasses often sacrifice comfort and fit for durability and strength.

SUMMARY

In some embodiments, to improve the fit and comfort of the eyeglass, various eyewear designs have been provided which reduce the weight of the eyeglass, allow the wearer to customize the fit of the eyeglass, or otherwise seek to alleviate pressure and discomfort during use. Further, various other advances have been made to improve the durability of the eyeglass and resist breakage.

In some embodiments, a self-customizing eyewear design can be worn on a variety of head sizes and shapes and reduce lateral pressure on the temples while permitting increased durability and sturdiness and providing qualities associated with rigid or high-stiffness materials. In some embodiments, a tunable earstem design allows a rigid earstem to adjust to a corresponding head size and shape and/or enhance retention and performance of the eyeglass.

For example, some embodiments disclosed herein reflect the realization that metal frame eyeglasses sometimes provide limited adjustability for a wearer and usually do not achieve an optimal fit over a range of different head sizes and shapes while providing a durable design. As a result, a given metal frame eyeglass size may comfortably fit onto a narrow head and make it easier for a user to put the eyeglasses on. However, such an eyeglass generally has only a limited range of adjustability and flexibility and therefore only fits a very small range of head sizes and shapes. Further, such an eyeglass may often exhibit poor durability in cases of misuse, impact, or the like. In other words, such an eyeglass can be deformed in such situations, thus causing the earstems and frame to be misaligned with respect to their original orientation.

Therefore, some of the embodiments disclosed herein reflect the realization that metal frame eyeglasses can be improved by modifying the earstems such that the earstems exhibit flexural properties that are similar, in some embodiments, to those exhibited by a plastic or injection molded earstem while providing a design that enhances the durability of the eyeglass.

It is noted that although some embodiments are discussed as being made from metal, any of the embodiment disclosed herein can be made of metal, plastic, and/or composite materials, etc., or some combination thereof. Thus, although many of the embodiments provide an effective solution to providing a metal earstem with enhanced performance, embodiments can also be made of plastic, composite, or combinations of materials.

Accordingly, various embodiments of an eyeglass are provided that comprise a frame and at least one earstem assembly that can be pivotable with respect to the frame. Some embodiments can be provided that utilize a rigid frame and a rigid earstem assembly. Further, the earstem assembly can comprise a flexible, resilient suspension component and an earstem. In some embodiments, the earstem can be indirectly connected to the frame by the suspension component. In some embodiments, the earstem assembly can be configured such that the earstem can be directly coupled to the frame, and/or the suspension component can be directly coupled to the frame.

In addition, some embodiments can incorporate at least one of a biasing mechanism, a dynamic dampening or deflection control mechanism, and a breakaway mechanism. Further, some embodiments incorporate a plurality of these features.

In some embodiments, the suspension component can be coupled to an end of the frame and to the earstem in a manner that allows the earstem to deflect from a deployed or fully open position in order to accommodate a larger head size or additional force on or movement of the earstem. In some embodiments, the earstem can be deflected relative to the frame while generally maintaining its shape and configuration. In other words, the shape of the earstem can remain generally constant while the earstem is deflected with respect to the frame.

Some embodiments can be provided with a breakaway mechanism, which can be especially advantageous for embodiments that use rigid materials. In this regard, rather than exceeding the yield stress of a rigid component, the breakaway mechanism can enable the component to be temporarily detached from the eyeglass. For example, if a force exerted on the earstem exceeds a given maximum allowable force, the suspension component can be configured to disconnect from the end of the frame, thus avoiding bending or inelastic deflection of the earstem. Subsequently then, the suspension component and the earstem can be reattached to the frame and assume the same original orientation prior to the application of the excessive force.

In some embodiments, the suspension component can be rotatably or pivotally attached to the frame. In this regard, the suspension component can be configured to have a rotational range between a stowed position and a deployed position. Some embodiments can comprise a biasing mechanism. In some embodiments, at least one of the suspension component and the frame can comprise one or more structures that limit rotation of the suspension component between the stowed position in the deployed position.

In some embodiments, the suspension component can be fixed to or monolithically formed with the frame. For example, the suspension component may be formed monolithically with the frame and/or include a flexible point that allows limited movement of the earstem assembly relative to the frame while preventing the earstem assembly from being fully pivoted inwardly towards the frame to a stowed position.

For example, an anterior portion of the suspension component can comprise a projection or other structure configured to urge the suspension component to one of a stowed position and a deployed position. When the suspension component is rotated to a position between the stowed position and the deployed position, the suspension component can tend to move or accelerate towards one of the stowed position and the deployed position rather than remaining in an intermediate position. Thus, the configuration of the anterior portion of the suspension component can be designed to interact with an interior structure or surface of the end of the frame such that the suspension component is biased to either the stowed position or the deployed position.

Further, some embodiments can comprise a dynamic dampening or bend control mechanism. For example, in some embodiments wherein the suspension component is rotatably attached to the frame, the suspension component can be deflectable upon exertion of additional force when rotated to the deployed position. In some embodiments, although the suspension component can be generally constrained against further rotation (e.g., by an interference fit at the pivot point of the suspension component), at least a portion of the suspension component can deflect with respect to the deployed position.

Additionally, some embodiments can be configured such that the earstem attaches to the suspension component at one or more points or locations. The attachment between the earstem and the suspension component can comprise one or more pivot points where the earstem and the suspension component can pivot with respect to each other and/or one or more fixed points at which the earstem in the suspension component cannot experience movement relative to each other.

For example, the earstem and the suspension component can be coupled to each other in some embodiments on at least two points. A first or anterior point can be a pivot point, and a second or posterior point can be a fixed point. In some embodiments, the suspension component (and not the earstem) can be directly coupled to the frame. Further, in some embodiments, the suspension component can be rotatably coupled to the frame. In this regard, the earstem can pivot about the first or anterior point while causing deflection of the suspension component at the second or posterior point.

In some embodiments, the portion of the earstem and the portion of the suspension component disposed between the first or anterior point and the second or posterior point can be curved or arcuately shaped. In this manner, the earstem can rotate about the first or anterior point while causing deflection at the second or posterior point. In some embodiments, the portion of the suspension component disposed between the first or anterior point and the second or posterior point can bow or deflect outwardly with respect to the earstem. In this manner, the suspension component can facilitate deflection of the earstem and provide an increasing or dynamic resistance to deflection thereof.

In addition, some embodiments can be configured to comprise a biasing mechanism and a dynamic dampening mechanism. In this regard, while the biasing mechanism would tend to urge the earstem assembly of the eyeglass to one of the stowed or deployed positions, the dynamic dampening mechanism would tend to create a controlled and smooth movement of the earstem assembly.

Accordingly, the present inventions relate to a variety of earstem configurations that provide enhanced performance. The earstem assembly can comprise at least one flexible portion and at least one relatively rigid portion or earstem that each can be modified to control one or more characteristics of the deflection of the earstem. Some of the characteristics of the deflection of the earstem can include the range of deflection, the number of deflection zones or points, the stiffness of the earstem, the deflection mode, and the structural constraints, to name a few. As a result, some of the embodiments disclosed herein can be implemented to provide an eyeglass that provides a customized fit for many different wearer head sizes or shapes.

In accordance with some embodiments, an eyeglass earstem assembly is provided that can comprise a flexible suspension component and a rigid elongate body. The flexible suspension component can have an anterior end and a posterior end. The anterior end of the suspension component can be pivotally coupled relative to an eyeglass frame. The flexible suspension component can be constrained against rotation relative to the eyeglass frame upon reaching a deployed position.

The rigid elongate body can have an anterior end and a posterior end. The anterior end of the rigid elongate body can be pivotally coupled relative to the eyeglass frame. The rigid elongate body and the suspension component can be attached to each other at a point posterior to the anterior ends of the rigid elongate body and the suspension component. The rigid elongate body can be operative to rotate relative to the eyeglass frame beyond the deployed position. In this regard, upon rotation of the rigid elongate body beyond the deployed position, the attachment between the rigid elongate body and the flexible suspension component can cause an opposing deflection of the flexible suspension component which can dampen further rotation of the rigid elongate body relative to the eyeglass frame.

In some implementations, the posterior end of the flexible suspension component can be coupled to the rigid elongate body. In some embodiments, the flexible suspension component can be approximately half the length of the rigid elongate body, and in some embodiments, the flexible suspension component can be greater than or equal to about one-quarter length of the elongate body and/or less than or equal to about one-half of the length of the elongate body. Further, the flexible suspension component can be pivotally coupled to the eyeglass frame.

Additionally, the rigid elongate body can be pivotally coupled to the flexible suspension component adjacent the anterior end thereof. In some implementations, the flexible suspension component can indirectly couple the rigid elongate body to the eyeglass frame.

Further, in some implementations, the anterior end of the suspension component can be configured to engage a portion of the eyeglass frame to limit relative rotation thereof. For example, the anterior end of the suspension component can comprise a protrusion that engages a surface of the eyeglass frame to limit relative rotation thereof.

The earstem assembly can also be configured such that the suspension component and/or the rigid elongate body define a generally arcuate shape. Further, the suspension component can be configured to increasingly dampen and/or provide resistance to rotation of the rigid elongate body upon continued rotation beyond the deployed position. Furthermore, the rigid elongate body can rotate beyond the deployed position to a deflected position. Rotation of the rigid elongate body can be generally constrained upon reaching the deflected position.

In accordance with some embodiments, an earstem assembly is provided that can comprise a flexible elongate body and a rigid elongate body. The flexible elongate body can have an anterior end and a posterior end. The anterior end can be pivotally coupled to the frame at a first pivot point. Further, the rigid elongate body can be pivotally coupled to the flexible elongate body adjacent to the anterior end thereof at a second pivot point. The rigid elongate body can be coupled to the flexible elongate body at a point posterior to the anterior end of the flexible elongate body. The rigid elongate body can be rotated about the second pivot point to move from a deployed position to a deflected position.

In some embodiments, an anterior portion of the rigid elongate body can be curved. Further, the flexible elongate body can be positioned adjacent to the rigid elongate body in the deployed position, and the flexible elongate body can be separated from the rigid elongate body along at least a portion thereof in the deflected position. Moreover, the flexible elongate body can be generally constrained against rotation when the rigid elongate body moves from the deployed position to the deflected position. In some implementations, the posterior end of the flexible elongate body can be coupled to the rigid elongate body at approximately a midpoint of the rigid elongate body.

Some embodiments also provide for an eyeglass that comprises a frame and a pair of earstems coupled to and extending from the frame. Each earstem can comprise a suspension component and a rigid elongate body. The suspension component can interconnect the rigid elongate body to the frame and can be operative to pivot relative to the frame until reaching a deployed position. The rigid elongate body can be operative to pivot relative to the frame beyond the deployed position. The suspension component can be attached to the rigid elongate body along a posterior portion of the suspension component such that pivoting of the rigid elongate body beyond the deployed position causes deflection of the suspension component to dampen further pivoting of the rigid elongate body.

The eyeglass can be configured such that the suspension component is pivotally coupled to the eyeglass frame. Further, the rigid elongate body can be pivotally coupled to the suspension component adjacent an anterior end of the suspension component. An anterior end of the suspension component can also be configured to engage a portion of the frame to limit relative rotation thereof. In some embodiments, the frame can be configured to support dual lenses or a unitary lens. The lenses of the eyeglasses can have many different geometries and can be made of many types of materials, including glass or polymers. Further, the frame can comprise full or partial orbitals configured to support dual lenses or a unitary lens.

DETAILED DESCRIPTION

While the present description sets forth specific details of various embodiments, it will be appreciated that the description is illustrative only and should not be construed in any way as limiting. Additionally, it is contemplated that although particular embodiments of the present inventions may be disclosed or shown in the context of dual lens eyewear systems, embodiments can be used in both unitary and dual lens eyewear systems. Further, it is contemplated that although particular embodiments of the present inventions may be disclosed or shown in the context of frames having full orbitals, such embodiments can be used with frames having full or partial orbitals, partial frames, or rimless frames. Furthermore, various applications of such embodiments and modifications thereto, which may occur to those who are skilled in the art, are also encompassed by the general concepts described herein.

Some embodiments disclosed herein are operative to provide adjustability and optimal fit over a wide range of different head sizes and shapes. An eyeglass can be fabricated using metals or other stiff materials that may have desirable properties while nevertheless enabling the eyeglass to provide desirable flexural properties in the earstems thereof. For example, titanium, carbon fiber, aluminum, and other such materials provide excellent mechanical properties while being lightweight. Indeed, various metals and rigid materials can be used to form the eyeglass, thus providing exceptional rigidity, durability, and wear resistance. However, rigid materials function very poorly in accommodating a wide range of head sizes and shapes. Thus, various embodiments disclosed herein enable the use of rigid materials such as metals, composites, and the like in eyewear while providing earstem flexibility.

Various embodiments are provided in which the eyeglass has a metal frame and is operative to provide superior adjustability and flexibility over a wide range of head sizes and shapes, comparable to that provided by a plastic eyeglass frame. Nevertheless, various features and aspects disclosed herein can be used in eyeglasses fabricated from any material, whether the eyeglass is made from plastic, composite, metal, or any combination thereof.

Therefore, some embodiments disclosed herein reflect the realization that metal frame eyeglasses can be improved by modifying the earstems such that the earstems exhibit flexural properties similar to, and in some cases exceeding, those exhibited by a typical plastic or injection molded earstem. Further, some embodiments provide for a rigid metal earstem that is operative to flex from a deployed position to a deflected position to allow the earstem to adjust to the natural and variable shape of a variety of head sizes and shapes.

Further, although some embodiments are discussed as being made from metal, any of the embodiments disclosed herein can be made of metal, plastic, and/or composite materials. Thus, although many of the embodiments provide an effective solution to providing a metal earstem with enhanced performance, embodiments can also be made of plastic, composite, or combinations of materials.

Further, while eyeglasses made of rigid materials present several design and manufacturing problems, the teachings and disclosure herein enable a person of skill in the art to design an eyeglass having desirable aesthetic properties and construct an exceptionally functional platform that provides superior comfort and adaptability for wearers.

In the present description, various mechanical terms may be used in reference to deformation and/or other structural characteristics of components of the embodiments disclosed herein. As used herein, the term “stiffness” or “bending stiffness” can be defined as the resistance of an elastic body to deformation by an applied force. In this regard, stiffness may not be the same as the “flexural or elastic modulus;” stiffness relates to a property of a solid body, and flexural or elastic modulus relates to a property of a material of the solid body.

In other words, stiffness is a property of the solid body that is dependent on the material and the shape and boundary conditions. For example, with reference to embodiments disclosed herein, the bending stiffness “EI” of an earstem relates the applied bending moment to the resulting deflection of the earstem. The bending stiffness is the product of the elastic modulus “E” of the earstem material and the area moment of inertia “I” of the earstem cross-section. Further, when a plurality of components, or a single component comprising a plurality of materials, are used in the earstem, the equation is modified accordingly to account for the individual components and material variations. In a basic illustration, according to elementary beam theory, the relationship between the applied bending moment M and the resulting curvature κ of the beam is:

M=EIK=EI⁢ⅆ2⁢wⅆx2
where w is the deflection of the beam and x the spatial coordinate. Accordingly, this is one example of how the bending stiffness of embodiments of the earstem can be measured. Other ways known to those of skill in the art can also be used.

FIG. 1illustrates an embodiment of an eyeglass10having enhanced earstem performance. The eyeglass10can comprise a pair of earstem assemblies12,14and a frame16. As will be discussed in further detail below, the eyeglass components, such as the earstem assemblies12,14and the frame16, can be formed from rigid materials, such as metal. Thus, the eyeglass10can be configured to provide a desirable look, weight, or stiffness. However, according to various principles and some embodiments discussed herein, the earstem assemblies12,14can exhibit exceptional deflective properties and durability in accommodating a variety of head shapes and sizes, even during rugged use.

As shown inFIGS. 1-3, the earstem assemblies12,14can be configured to comprise one or more components. In some embodiments, these components can be formed from distinct materials. Further, in accordance with some embodiments, these components can be replaceable or interchangeable in order to allow a user to customize the look and/or feel of the eyeglass, or replace or repair damaged or worn components. The components can be configured to interact such that the individual properties of the components can collectively provide advantageous properties for the earstem assemblies12,14.

For example, in accordance with an embodiment the earstem assemblies12,14can each comprise a suspension component or flexible elongate body22,24and an earstem or rigid elongate body32,34. The flexible elongate bodies22,24can be formed from a flexible, resilient material. For example, the flexible suspension components22,24can be formed from plastic, composites, and the like. Further, the earstems32,34can be formed from a rigid material. For example, the earstems32,34can be formed from metal, such as aluminum, or rigid plastics and composites. The earstems32,34may exhibit some flexibility. However, in some embodiments, the flexibility of the suspension components22,24is greater than the flexibility of the earstems32,34. The terminology “flexible” and “rigid” as applied to the suspension components22,24and the earstems32,34can be relative to the components22,24,32,34.

Referring now toFIG. 3, the suspension component24can be coupled to the frame16. The suspension component24can be formed monolithically or separately from the frame16. Thus, some embodiments can be provided in which the suspension component24extends in a deployed position from the eyeglass10and does not fold inwardly toward a stowed position relative to the eyeglass10. As will be discussed further herein, various principles and embodiments can be implemented with either configuration.

In the illustrated embodiment ofFIG. 3, the suspension component24can comprise an anterior portion40and a posterior portion42. As illustrated, the anterior portion40of the suspension component24can be pivotally coupled to an end46of the frame16. In some embodiments, the end46of the frame16can be configured to comprise a receptacle50. As discussed further below, the receptacle50can be formed separately from the frame16. In some embodiments, the receptacle50and the frame16can be formed from different materials. For example, the receptacle50can advantageously be formed from a resilient material, such as plastic, that can provide beneficial properties for a hinge-joint interaction with the earstem assembly12. Further, the receptacle50can be interchangeable and/or customizable to allow the wearer to select a receptacle having a preferred material or geometric property. However, in some embodiments, the receptacle50can be formed monolithically with the frame16.

Additionally, as also shown inFIG. 3, the suspension component24can be coupled to the earstem34along the posterior portion42thereof. For example, the suspension component24can be mechanically attached to the earstem34. The attachment or coupling of the suspension component24to the earstem34can be accomplished using a moveable connection, such as by a snap fit, mechanical fasteners, adhesives, or other forms of bonding the suspension component24to the earstem34. The suspension component24can be coupled to the earstem34along only a portion of the length or at a discrete point of the suspension component24.

For example, as shown inFIG. 3, the suspension component24can comprise one or more apertures60through which one or more fasteners62can pass to couple the posterior portion42of the suspension component24to the earstem34. In an embodiment wherein the suspension component24comprises apertures60, the fasteners62can comprise mechanical fasteners such as screws, clips, mating protrusions, heat staking, mattel pins, interference pins, dovetails with snap, snap tabs, christmas/pine tree one-time fasteners, etc. However, in some embodiments, the suspension component24can be attached to the earstem34using a variety of other types of fastening or bonding means, including products and methods such as adhesive bonding, ultrasonic bonding, welding, overmolding or comolding, interference fitting, etc.

FIG. 3also illustrates that in some embodiments, the eyeglass10can be configured such that only the suspension component24is coupled to the frame16. In such embodiments, an anterior portion70of the earstem34can be coupled or attached to the suspension component24. Thus, the earstem34can be coupled or attached to the suspension component24on at least one discrete point.

In some embodiments, both the earstem34and the suspension component24can be constrained to rotate about a rotation axis or axes relative to the frame16. The suspension component24and the earstem34can both be pivotally attached to the frame and have separate or a common pivot axis. However, in some embodiments, the suspension component24and the earstem34can be coupled or attached at a plurality of discrete points (e.g., two).

For example, the two coupling or attachment points can be positioned intermediate an end of the anterior portion70and an end of a posterior portion72of the earstem14. Thus, the earstem34can attach to the suspension component24at two locations and therefore be coupled indirectly to the frame16. In such an embodiment, the earstem34can have two pivot axes, a first that is the pivot axis between the suspension component24and the frame16, and a second that is the pivot axes between the earstem34and a suspension component24. In such embodiments, the suspension component24and the earstem14can be coupled or attached to each other at two points that are separated from each other along the length of the suspension component24.

As discussed below, according to the configuration illustrated in the embodiment shown inFIGS. 1-5and others disclosed herein, the earstem assembly can be configured to allow the suspension component24to deflect relative to the earstem34, which can allow the earstem34to dynamically deflect for accommodating a variety of head sizes and shapes. In other words, the deflection of the earstem34from a deployed position (shown inFIG. 4A) to a deflected position (shown inFIG. 4B) can produce a spacing or separation between the earstem34and the suspension component24. Such a deflection and spacing can result from the configuration of the earstem34and the relationship between the spacing of attachment points of the suspension component24and the earstem34and the length of the suspension component24and earstem34.

With regard to the deflection of the suspension component24,FIG. 3illustrates that the suspension component24can be coupled to the earstem34at the anterior portion40and the posterior portion42of the suspension component24. In this manner, the length of the suspension component24disposed between the attachment points can deflect relative to the earstem34as needed. For example,FIGS. 13-15illustrate the suspension component24deflecting inwardly toward the earstem34. Further, FIGS.4B and17-18illustrate the suspension component20for deflecting outwardly away from the earstem34.

Further, as mentioned above, the spacing or separation distance of the attachment points between the suspension component24and the earstem34can affect the degree of deflection of the suspension component24from the earstem34. The spacing can therefore also affect the degree of deflection or fit of the earstem assembly14when the eyeglass10is worn by a user. Some embodiments disclosed herein reflect the realization that when the spacing or distance of the attachment points (as measured in a straight line) is less than the length of the suspension component24between the attachment points, the suspension component24can deflect relative to the earstem34. Further, the relationship between the spacing of the attachment points in the length of the suspension component24can be optimized to provide a desired degree of deflection or stiffness of the earstem assembly14when worn by a user. Further, the design of the earstem34can also be modified to optimize the interaction between the earstem34and the suspension component24to affect the deflection and function of the suspension component24.

FIG. 4Aillustrates a top view of the eyeglass10wherein the earstem assembly14is shown in a deployed position. The deployed position is achieved when the earstem assembly14is pivoted outwardly away from the frame16until reaching a predetermined stop position, or a position at which further deflection requires a substantially larger force. In some embodiments, the deployed position of the eyeglass10can be achieved when the earstem assembly14reaches a rotational position that is limited by interference between structures of the frame16and the earstem assembly14. As shown inFIG. 4B, and as described further herein, although the earstem assembly14reaches the maximum angular or deployed position, the interaction between the suspension component24and the earstem34can allow the earstem34to deflect beyond the deployment position shown inFIG. 4A. In other words, although the suspension component24can resist further rotation, the suspension component24can deflect relative to the frame16in order to allow the earstem34of the earstem assembly14to pivot further beyond the deployed position relative to the frame16to a deflected position. These principles are also shown and described further below, and especially with respect toFIGS. 17-18.

As shown inFIGS. 1-2and4, the earstem assemblies12,14can also be configured to appear as singular, integrated units when the eyeglass is worn. In this regard, when the earstem assemblies12,14are viewed from the side or top, the suspension components22,24can be positioned on the medial side of the earstem and nested within, or generally flush with the top and side profiles of, the earstems32,34. Thus, the appearance of the earstem assemblies12,14is clean and simple. Accordingly, in the deployed or stowed position, the suspension components22,24can be hid or received within cavities of the earstems32,34. AlthoughFIG. 4illustrates that the posterior portions76,42of the respective suspension components22,24are visible from above, the coupling or attachment mechanism or structure can be flush or inconspicuous relative to the respective earstem32,34. In this manner, the eyeglass10can provide advantageous functional qualities without exposing the suspension components22,24and without detracting from the aesthetic design of the eyeglass frame.

Turning now toFIGS. 5-6, an embodiment of the earstem34is illustrated. As discussed above, the earstem34can comprise anterior and posterior portions70,72. Further, the earstem34can comprise a cavity or recess80formed along the anterior portion70thereof. The cavity80can be configured to accommodate at least a portion of the corresponding suspension component24. Further, the cavity80can extend up to a medial section82of the earstem34. The cavity80can have a depth sufficient to provide a space between an interior surface of the cavity80and an outer surface of the suspension component24that opposes the interior surface of the cavity80. In this regard, the spacing between the interior surface of the cavity80and the suspension component24can be selectively modified to achieve a desired articulation or deflection of the suspension component24. In this manner, the fit and feel of the eyeglass10can be customized. For example, a user can insert interchangeable earstems in order to optimize and personalize the fit and feel of the eyeglass.

Therefore, in some embodiments, a central section of the suspension component can be separated from, or not securely fastened to, the interior or medial surface of the earstem, or cavity within the earstem, when the earstem assembly is in the deployed position. This separation can be advantageous because the suspension component can be deflected in either direction, thus creating a slight resistance or dampening to motion of the earstem. As the earstem is moved beyond the deployed position into the deflected position, the distance of separation between the central section of the suspension component and the interior or medial surface of the earstem can increase, causing the suspension component to become arcuately shaped in the deflected position, as illustrated.

As also illustrated, the earstem34can comprise an attachment section84that can be configured to facilitate attachment or coupling between the suspension components24and the earstem34. In the illustrated embodiment, the attachment section84comprises a plurality of attachment points (e.g., screw holes formed in the earstem34, that are configured to receive screws62passed through recesses or apertures of the suspension component24) for attaching the posterior portion42thereof to the earstem14. In this regard, the attachment section84can correspond to one of the attachment points between the earstem34and the suspension component24. As illustrated, the attachment section84can comprise a fixed attachment point at which relative movement between the earstem34and the suspension component24is restricted. However, it is contemplated that in some embodiments, the attachment section84can comprise a slidable or otherwise movable joint between the suspension component24and the earstem34. For example, the attachment section84can comprise a sleeve or grooves disposed on a medial side of the earstem34into which at least a portion of the suspension component24is received for interconnecting the suspension component24and the earstem34at a joint, whether fixed or moveable. In some embodiments, the suspension component24can slide into a sleeve, cavity, groove, or aperture coupled to or formed in the earstem34in order to be retained relative to the earstem34. The earstem assembly14can provide an adjustable and personalized articulation.

In addition, the earstem34can comprise a rotational coupling section90that is formed along the anterior portion70of the earstem34. The coupling section90can correspond to another one of the attachment points between the earstem34in the suspension member24. The illustrated embodiment of the rotational coupling section90provides an upper recess92and a lower recess94formed along the interior of the cavity80. The upper and lower recesses92,94can be generally arranged to form a pivot axis96. As shown, the pivot axis96is oriented transversely relative to a vertical axis. The orientation of the pivot axis96can be selected to provide unique articulative properties. In this manner, the axis96can be arranged to be vertical or non-vertical, in order to achieve a desirable deflection and rotation angle of the earstem14.

Referring now toFIGS. 7-9, an embodiment of the suspension component24is shown.FIG. 7illustrates a perspective view of the suspension component24illustrating the anterior and posterior portions40,42wherealong the first and second attachment or coupling points can be formed between the suspension component24and the earstem34. As shown, the suspension component24can comprise the apertures60that can form an attachment or coupling point with the earstem34. As noted above, the apertures60can be configured to receive one or more mechanical fasteners that interconnect the posterior portion42with the attachment section84.

In addition, the suspension component24can comprise upper and lower protrusions100,102that can engage with the earstem34to form another attachment or coupling point. The upper and lower protrusions100,102can be configured to be received within the upper and lower recesses92,94of the coupling section90of the earstem34. In this regard, while the apertures60can form a generally static or fixed coupling between the suspension component24and the earstem34, the upper and lower protrusions100,102can form a moveable joint with the earstem34. In some embodiments, the upper and lower protrusions100,102can form a pivot joint with the earstem34. The pivotability of the earstem34about the upper and lower protrusions100,102can cause the suspension component24to deflect which can allow the earstem34to deflect relative to the frame16further beyond the deployed position to a deflected position, as shown inFIGS. 4B and 17.

In the illustrated embodiment of the suspension component24, the upper and lower protrusions100,102are illustrated as being offset. In this regard, the upper and lower protrusions100,102can form a pivot axis104that can be generally aligned with the pivot axis96of the earstem34. As noted above, the alignment and orientation of the pivot axes96,104can be adjusted to provide a desired earstem articulation, such as deflection and rotation angle. For example, the upper and lower protrusions100,102can lie along a common vertical axis (similar to the spherical heads of the upper and lower connectors112,114discussed below).

Further,FIG. 9also illustrates that the suspension component24can comprise a protrusion116formed along the anterior portion40thereof. The protrusion116can interact with an interior surface or structure of the end46of the frame16in order to influence the articulation of the earstem assembly14. These features and functions are described further herein. The length of the suspension component can be at least about ½ inch and/or less than or equal to about 5 inches. In some embodiments, the length of the suspension component can be at least about 1 inch and/or less than or equal to about 4 inches. Further, in some embodiments, the length of the suspension component can be at least about 2 ½ inches.

As also illustrated inFIGS. 7-9, the suspension component24can be configured such that the anterior portion40can be pivotally coupled to the frame16. In this regard, the anterior portion40can comprise a fork-shaped coupling110having upper and lower connectors112,114with protrusions that can engage the frame16. The connectors112,114can define a pivot axis. For example, the protrusions of the upper and lower connectors112,114, which are illustrated as spherical heads, can define a vertical pivot axis. In the illustrated embodiment, the pivot axis of the connectors112,114can be transversely aligned relative to the pivot axis104of the protrusions100,102. The fork-shaped coupling110can be configured to allow the connectors112,114to deflect toward each other in order to fit the coupling110into engagement with the end46or receptacle50of the frame16.

For example,FIG. 10shows an exploded perspective view of components of the eyeglass10. In this figure, the earstem34is separated from the suspension component24, which is removed from connection with the receptacle50of the frame16. Further, the receptacle50and a fastener120or screw are shown as being detached from a cavity122formed in the end46of the frame16. Thus, in order to assemble the eyeglass, the receptacle50it is attached to the frame16. Further, the upper and lower protrusions100,102of the suspension component24can be aligned with and received in the upper and lower recesses92,94of the earstem34. Furthermore, the screws62can be used to attach the posterior portion of the suspension component24to the earstem34. Finally, the upper and lower connectors112,114can be inserted into the receptacle50to attach the earstem assembly14to the frame16. The unique configuration of the earstem assembly14allows the earstem34to be urged to a deflected position upon further exertion of force when in the deployed position.

FIG. 11is an enlarged perspective view of the receptacle50shown to illustrate further features of such an embodiment. The receptacle50can comprise an earstem connection portion128. The earstem connection portion128can be configured to receive and/or mate with the earstem assembly12for securing the earstem assembly12relative to the frame16. The earstem connection portion128can comprise a variety of different structures, such as a hinge pin with a thru hole, a hinge pin with one-time snap, protrusions extending from the earstem assembly12that mate with corresponding recesses in the receptacle50, protrusions extending from the receptacle50that mate with corresponding recesses in the earstem assembly12, combinations thereof, and the like. Further, the structure(s) of the earstem connection portion128can be formed monolithically with the earstem connection portion128and/or can be formed separately from the earstem connection portion128. For example, the earstem connection portion128can comprise a hinge pin, which can be metal or non-metallic.

As illustrated inFIG. 11, the earstem connection portion128can comprise upper and lower indentations130,132configured to receive or mate with the respective upper and lower connectors112,114of the coupling110of the suspension component24. The indentations130,132can define a pivot axis that is substantially coaligned with the pivot axis of the connectors112,114upon mating of the indentations130,132and the connectors112,114. In the illustrated embodiment, the pivot axes can be generally vertical to allow the earstem assembly14to pivot relative to the frame between the stowed and deployed positions. Further, the receptacle50can comprise an aperture134configured to receive a fastener or screw for attaching the receptacle50to the frame16.

In addition, the receptacle50can comprise a guide track136that can allow self-aligning of the connectors112,114as the coupling110of the suspension component24is urged into engagement with the receptacle50. The guide track136can comprise a recess or indentation having a variable depth relative to an interior surface of the receptacle50. A lower guide track is shown inFIG. 11, but an upper guide track can also or alternatively be provided. In some embodiments, the guide track136can extend deeper towards a peripheral end138thereof.

Furthermore, the eyeglass can also incorporate a biasing mechanism. For example,FIG. 11also illustrates that the receptacle50can comprise one or more recesses or indentations that can interact with the protrusion116of the suspension component24to influence the articulation of the earstem assembly14. As illustrated, the interior surface or structure of the receptacle50can comprise a protruding section139and first and second recess sections146,148. As discussed further below, the protruding section139can contact or engage the protrusion116of the suspension component24to urge or bias the protrusion116into one of the first and second recess sections146,148. Thus, rotation of the suspension component24when fitted into the receptacle50can cause interference between the protrusion116and the protruding section139. However, the first and second recess sections146,148can be configured to receive the protrusion116, thereby representing respective stowed and deployed positions of the suspension component24.

As shown inFIG. 12, the connectors112,114can catch or be received within the guide track136and as the connectors112,114are advanced toward the indentations130,132, the connectors112,114are deflected inwardly from undeflected positions toward each other until rebounding to their undeflected positions upon engaging the indentations130,132. In this manner, the connectors112,114can be securely received into the indentations130,132of the receptacle50in order to maintain secure engagement between the suspension component24and the frame16.

Further, the eyeglass can incorporate a breakaway mechanism. For example, the connectors112,114can be configured such that upon exertion of sufficient force, the coupling110can be dislodged or removed from the receptacle50. In this manner, embodiments of the eyeglass may have not only the robust qualities and stiffness associated with rigid materials, but the eyeglass can also be resilient, durable, and avoid failure when stresses or other forces are exerted on the eyeglass. Accordingly, a user can enjoy the benefits of a rigid frame and earstem combination as well as a yielding earstem joint that will decouple without breaking.

Referring now toFIGS. 13-15, the articulation of the earstem assembly14is illustrated from the deployed position (FIG. 13), to an intermediate position (FIG. 14A) and to the stowed position (FIG. 15) upon exertion of a force F. These cross-sectional top views illustrate the interaction of the coupling110of the suspension component24with an interior surface140of the receptacle50. The configuration of the coupling110and the interaction between the coupling110and the interior surface140of the receptacle50facilitate a “rebound” action for the earstem assembly14to one of the stowed or deployed positions. In other words, when rotating the earstem assembly14to open or deploy the earstem assembly14, the earstem assembly14will initially resist movement from the stowed position, but upon reaching the intermediate position, the earstem assembly14will generally move or accelerate toward the deployed position. Similarly, when rotating the earstem assembly14to close or stow the earstem assembly14, the earstem assembly14will initially resist movement from the deployed position, but upon reaching the intermediate position, the earstem assembly14will generally move or accelerate toward the stowed position.

In some embodiments, as discussed below, the coupling110can comprise a projection116that creates interference during rotation of the earstem assembly14. However, the interior surface140of the receptacle50can be configured such that the projection116can be accommodated without resistance when the coupling110is oriented in one of the stowed or deployed rotational orientations. Thus, the projection116can encounter resistance during rotation when the rotational alignment is between that of the stowed and deployed rotational orientations. A suitable projection can also be located on the receptacle50and a projection engaging surface (such as a recess) can be provided on the earstem.

As illustrated inFIG. 14B, the interior surface or structure of the receptacle50can comprise the protruding section139and the first and second recess sections146,148. The protruding section139can contact or engage the protrusion116of the suspension component24to urge or bias the protrusion116into one of the first and second recess sections146,148. Thus, the projection116encounters resistance during rotation from the deployed position shown inFIG. 13to the stowed position shown inFIG. 15. In this regard, the configuration of the protruding section139and the first and second recess sections146,148can be configured to “tune” the resistance and biasing of the suspension component24. As noted previously, the first and second recess sections146,148can be configured to receive the protrusion116, thereby representing respective stowed and deployed positions of the suspension component24.

In addition, as the earstem assembly14undergoes the initial resistance and rebound to or from one of the stowed or deployed positions, the suspension component24can assist in providing a more fluid movement. As noted, various embodiments can be configured such that the posterior portion42of the suspension component24can deflect relative to the anterior portion40thereof. Thus, even if the suspension component24is not rotating, the suspension component24can deflect.

Accordingly, when the projection116of the suspension component24engages the interior surface140of the receptacle50, rotation of the anterior portion40of the suspension component24can be inhibited, but the posterior portion42of the suspension component24can still deflect. The earstem34can be coupled to the suspension component24as described above, thereby allowing the earstem34to move in a constant fluid motion—albeit with dynamic resistance—that is influenced by the interaction of the projection116and the interior surface140of the receptacle50. As a result, jerking or uneven motions of the earstem assembly14can be reduced and/or eliminated as the earstem assembly14is opened or closed.

During movement of the earstem assembly14from the deployed position to the stowed position, the suspension component24can flex inwardly into a space142formed between an interior surface of the cavity of the earstem34and the suspension component24. An illustration of this action is shown inFIG. 14A. It can contribute to the fluidity of the motion as the earstem assembly14rotates. Further, this deflection of the suspension component24into the recess of the earstem34can also result in rotational movement of the earstem34relative to the suspension component24about the pivot axis formed between the upper and lower protrusions of the suspension component24and the upper and lower recesses of the earstem34.

FIG. 15illustrates the earstem34in the stowed position. In some embodiments, when the earstem34is moved to the stowed position, the earstem assembly14can be configured to avoid contacting the frame16of the eyeglass10. For example, the earstem34can be restrained from further motion beyond the stowed position that would otherwise result in contact between the posterior section of the earstem34and the frame16. In some embodiments, the suspension component24can bias the earstem34toward the stowed position and away from contact with the frame16. The suspension component24can absorb momentum forces from the earstem34as the earstem34approaches the stowed position from the deployed position. For example, the suspension component24can deflect into the cavity of the earstem34to dampen and provide resistance to further movement of the earstem34toward the frame16from the stowed position.

FIGS. 16-17illustrate cross-sectional top views of the earstem assembly14in the deployed position (shown inFIG. 16in solid lines, and inFIG. 17in dashed lines) and in the deflected position (shown inFIG. 17in solid lines). As discussed above, the earstem34can be coupled to the suspension component24at a plurality of points, e.g. two distinct points, as shown inFIGS. 16-17. With reference toFIG. 16, the earstem34can be coupled to the suspension component24at a first point150. In some embodiments, the earstem34can be rotatably coupled to the suspension component24at the first point150. Further, the earstem34can be fixed or statically coupled to the suspension component24at a second point152. Finally, the suspension component24can be pivotally coupled to the frame16at a third point156.

When comparing the deployed and deflected positions ofFIGS. 16-17, the suspension component24does not rotate about the third point156beyond the deployed position. In this regard, in some embodiments, the suspension component24only rotates about the third point156during rotation of the earstem assembly14from the stowed position to the deployed position and vice-versa.

In some embodiments, rotation can occur about the first point150. In this regard, a rotational coupling of the earstem34to the suspension component24at a location posterior to the third point156can facilitate deflection of the earstem34from the deployed position (FIG. 16) to the deflected position (FIG. 17). The rotatable coupling between the earstem34and the suspension component24at the second point154further facilitate over-rotation or deflection of the earstem34to the deflected position.

As illustrated inFIG. 17, the earstem34can deflect by a given deflection angle170. The deflection angle170of the earstem34can be at least about 5 degrees and/or less than or equal to about 45 degrees. In some embodiments, the deflection angle170of the earstem34can be at least about 15 degrees and/or less than or equal to about 30 degrees. Further, in some embodiments, the deflection angle170of the earstem34can be at least about 23 degrees. Additionally, if the deflection of the earstem34is measured at the posterior end of the earstem34, a deflection distance172of the earstem34can be at least about ¼ inch and/or less than or equal to about 2 inches. In some embodiments, the deflection distance172of the earstem34can be at least about 1¾ inch and/or less than or equal to about 1¾ inches if measured at the posterior end of the earstem34. Further, in some embodiments, the deflection distance172of the earstem34can be at least about 1½ inch if measured at the posterior end of the earstem34.

Additionally, the deflection can also be measured based on the deflection of the suspension component when in the deployed position. For example, referring toFIG. 4, the suspension component24can be deflected at a deflection distance176. The deflection distance176of the suspension component24can be at least about 1/16 inch and/or less than or equal to about ½ inch. In some embodiments, deflection distance176of the suspension component24can be at least about ⅛ inch and/or less than or equal to about ¼ inch. Further, in some embodiments, the deflection distance176of the suspension component24can be at least about ⅜ inch. In some embodiments, the deflection distance176is at least about as large as the thickness of the suspension component and/or less than or equal to about the thickness of the earstem (e.g., the distance between the lateral and medial surfaces of the earstem).

In some embodiments, the anterior portion of the earstem34and the anterior portion of the suspension component can each define a generally curved or arcuate geometry. For example, at least one of the anterior portion of the earstem34and the anterior portion of the suspension component can have an arc of curvature174of at least about 1 inch and/or less than or equal to about 8 inches. In some embodiments, at least one of the anterior portion of the earstem34and the anterior portion of the suspension component can have an arc of curvature174of at least about 3 inches and/or less than or equal to about 6 inches. In some embodiments, at least one of the anterior portion of the earstem34and the anterior portion of the suspension component can have an arc of curvature174of at least about 4½ inches and/or less than or equal to about 5½ inches. In some embodiments, the arc of curvature174of at least one of the anterior portion of the earstem34and the anterior portion of the suspension component can be constant; however, the arc of curvature174can also vary along the length of the earstem34and/or suspension component. Further, in some embodiments, the earstem34can be generally straight and the suspension component can be curved. As a result, some embodiments allow the suspension component to deflect relative to the earstem into a recess or cavity of the earstem while the earstem has a generally straight configuration. Thus, the length of the suspension component24can be modified relative to the distance between the attachment points, as discussed above, in order to control the amount and/or degree of deflection of the earstem34.

Further, as noted above, the various components of the eyeglass10can be fabricated from a variety of materials and in a variety of ways, including comolding, overmolding, and the like. For example, the frame16and the earstems32,34can be fabricated from a rigid material while the suspension components22,24can be fabricated from a resilient, flexible material. In addition, the receptacle50can also be fabricated from a resilient, flexible material. However, in addition to varying the material properties of these components, an interchangeable system of components can be provided by which a user is able to adjust the articulation of the eyeglass10. A variety of suspension components can be provided that have combinations of lengths, thicknesses, and configurations for the coupling section110and protrusion116. In this manner, a user can personalize their eyeglasses according to their wants and needs.

Furthermore, certain portions of the earstems32,34, such the posterior portions thereof can be formed of a material that is bendable to a given shape while retaining elastic properties. For example, such an embodiment could utilize comolding or overmolding such that the earstems32,34exhibit variable properties along the lengths thereof. In this regard, the posterior half or posterior portion of the elongate body or spine can be bended by the wearer in order to further customize the fit of the eyeglass.