Hearing Protection Device

An exemplary hearing protection device includes a base portion, and an elongate mounting portion protruding from the base portion. The mounting portion includes a first end fixed to the base portion and a second end opposite the first end. The mounting portion decreases in thickness from the first end to a first point between the first end and the second end, increases in thickness from the first point to a second point between the first point and the second end, and decreases in thickness from the second point to the second end. The hearing protection device also includes a plug portion detachably secured to the mounting portion. The plug portion is configured to at least partially insert into a user's ear canal.

TECHNICAL FIELD

This disclosure relates to hearing protection devices.

BACKGROUND

Disposable and non-disposable hearing protection devices soften, reduce or eliminate the amount of noise, dust, pollution, water, and wind that reaches a person's ear. Example hearing protection devices include ear plugs (e.g., devices that are inserted into a portion of person's ear) and ear muffs (e.g., devices that are placed over the exterior of a person's ear and shield the ear from noise, dust, pollution, water, and wind). Hearing protection devices are often used in noisy environments to protect a user's hearing in a broad range of different environments, settings, and/or purposes. For example, hearing protection devices are often used during motor cross and automotive racing events, sport shooting events, athletic events, parades, festivals, sporting events, and musical events. As another example, hearing protection devices are also often used in airports, construction sites, gun ranges, drilling sites, mining sites, hospitals (e.g., in MRI facilities), factories, laboratories, stadiums. As yet another example, hearing protection devices are often used in during relaxation activities (e.g., yoga and meditation) or as a sleep aid. As yet another example, hearing protection devices are often used during military operations (e.g., while firing ordinance, flying an aircraft, or driving a vehicle). As yet another example, hearing protection devices are often used during athletic activities (e.g., during swimming). As yet another example, hearing protection devices are often used during air travel (e.g., to reduce noise and/or the effects of changing cabin pressure). As yet another example, hearing protection devices are often used to reduce hearing loss, tinnitus, and other medical conditions. As yet another example, hearing protection devices are often used by those with special medical needs (e.g., autism).

SUMMARY

In general, in an aspect, a hearing protection device includes a base portion, and an elongate mounting portion protruding from the base portion. The mounting portion includes a first end fixed to the base portion and a second end opposite the first end. The mounting portion decreases in thickness from the first end to a first point between the first end and the second end, increases in thickness from the first point to a second point between the first point and the second end, and decreases in thickness from the second point to the second end. The hearing protection device also includes a plug portion detachably secured to the mounting portion. The plug portion is configured to at least partially insert into a user's ear canal.

Implementations of this aspect may include or more of the following features.

In some implementations, the mounting portion can monotonically decrease in thickness from the first end to the first point, monotonically increase in thickness from the first point to the second point, and monotonically decrease in thickness from the second point to the second end.

In some implementations, the plug portion can define a channel, and the mounting portion can be configured to insert into the channel to secure the mounting portion of the plug portion. An inner diameter of the channel can vary between a first end of the channel and a second end of the channel. The channel can be defined by an elastic material. The channel can extend across a full length of the plug portion.

In some implementations, the mounting portion can be substantially continuous between the first end and the second end.

In some implementations, the plug portion can include a compressible material.

In some implementations, the base portion can include a decorative portion that extends outside of the user's ear when the plug portion is inserted into the user's ear canal.

In some implementations, the plug portion can be configured to attenuate sound entering into the user's ear when the plug portion is at least partially inserted into the user's ear canal.

In general, in another aspect, a hearing protection device includes a base portion, and an elongate mounting portion protruding from the base portion. The mounting portion includes a first end fixed to the base portion, a second end opposite the first end, and a protrusion between the first and second ends. The hearing protection device also includes a plug portion detachably secured to the mounting portion. The plug portion is configured to at least partially insert into a user's ear canal.

Implementations of this aspect may include or more of the following features.

In some implementations, the plug portion can define a channel, and the mounting portion can be configured to insert into the channel to secure the mounting portion of the plug portion.

In some implementations, the channel can define a recess for receiving the protrusion on the mounting portion.

In general, in another aspect, a hearing protection device includes a base portion, and an elongate mounting portion protruding from the base portion. The mounting portion includes a first end fixed to the base portion, a second end opposite the first end, and a first annular protrusion and a second annular protrusion disposed between first end and the second end. The hearing protection device also includes a plug portion detachably secured to the mounting portion and configured to at least partially insert into a user's ear canal. The plug portion defines a channel having a first recess configured to accept the first annular protrusion and a second recess configured to accept the second annular protrusion.

Implementations of this aspect may include or more of the following features.

In some implementations, the plug portion can include a flexible material, and wherein the channel is defined by the flexible material. The flexible material can include a rubber.

In some implementations, the plug portion can include a compressible material, and the compressible material can be disposed along an outer periphery of the flexible material. The compressible material can include a foam.

In general, in another aspect, a hearing protection device includes a base portion defining a channel, and a clamp portion having a plurality of clamp elements. The clamp element is at least partially disposed within the channel and the clamp element is configured to shift within the channel between an open position and a closed position. The hearing protection device also includes a plug portion detachably secured to the base portion via the clamp member and configured to at least partially insert into a user's ear canal. In the closed position, the plurality of clamp elements grasp a periphery of the plug portion to secure the plug portion to the base portion. In the open position, the plurality of clamp elements release the plug portion from the base portion.

Implementations of this aspect may include or more of the following features.

In some implementations, the clamp portion can include at least two clamp elements.

In some implementations, the clamp portion can further include a button, and a spring disposed between the clamp elements and the button. When the button is depressed, the spring can shift the clamp portion to the open position. When the button is released, the spring can shift the clamp portion to the closed position.

In general, in another aspect, a hearing protection device can include a base portion defining a first channel, and a mounting portion at least partially disposed within the first channel and configured to longitudinally shift within the first channel between a first position and a second position. The mounting portion includes an elongate shaft member, and a plurality of support elements. The hearing protection device also includes a plug portion detachably secured to the base portion via the support elements and configured to at least partially insert into a user's ear canal. The plug portion defines a second channel. In the first position, the shaft member radially biases the support elements against an interior of the second channel of the plug portion to secure the plug portion to the base portion. In the second position, the shaft member radially biases the support elements away from the second channel of the plug portion to release the plug portion from the base portion.

Implementations of this aspect may include or more of the following features.

In some implementations, the shaft member can include a groove configured to receive the support elements. In the first position, the support elements can be positioned within the groove. In the second position, the support elements can be positioned outside of the groove.

In some implementations, the groove can be defined along an outer circumference of the shaft member.

In some implementations, the mounting portion can further include a button, and a spring disposed about a periphery of the elongate shaft member. When the button is depressed, the mounting portion can shift to the open position. When the button is released, the mounting portion can shift to the closed position.

In general, in another aspect, a hearing protection device includes a base portion, wherein the base portion defines a first channel, and a mounting portion at least partially disposed within the first channel and configured to rotate within the channel between a first rotational position and a second rotational position. The mounting portion includes a gear member, and a plurality of support elements. The hearing protection device also includes a plug portion detachably secured to the base portion via the support elements and configured to at least partially insert into a user's ear canal. The plug portion defines a second channel. In the first rotational position, the gear member radially biases the support elements against an interior of the second channel of the plug portion to secure the plug portion to the base portion. In the second rotational position, the shaft member radially biases the support elements away from an interior of the second channel of the plug portion to release the plug portion from the base portion.

Implementations of this aspect may include or more of the following features.

In some implementations, the gear member can include a plurality of grooves each configured to receive one of the support elements. In the first rotational position, the support elements can be positioned within a respective groove. In the second rotational position, the support elements can be positioned outside of a respective groove. The grooves can be angularly spaced about a circumference of the gear member.

In some implementations, the first rotational position and the second rotational position can differ by approximately 30°.

In general, in another aspect, a hearing protection device includes a base portion including a first magnet, and a plug portion including a second magnet. The plug portion is detachably secured to the mounting portion via a magnetic force between the first magnetic and the second magnet. The plug portion is configured to at least partially insert into a user's ear canal.

In some implementations, the first magnet can be disposed within a first recess defined by the base portion, and the second magnet can be disposed within a second recess defined by the plug portion.

In general, in another aspect, a hearing protection device includes a base portion, and an elongate mounting portion protruding longitudinally from the base portion. The mounting portion includes a plurality of first teeth protruding radially from the mounting portion. The hearing protection device also includes a plug portion defining a longitudinally extending channel. The plug portion includes a plurality of second teeth protruding radially into the channel, and wherein the plug portion is detachably secured to the base portion via the first teeth and second teeth. The plug portion is configured to at least partially insert into a user's ear canal. When the elongate mounting portion is in a first rotational position relative to the base portion, the first teeth engage with the second teeth to secure the plug portion to the base portion. When the elongate mounting portion is in a second rotational position relative to the base portion, the first teeth disengage from the second teeth to release the plug portion from the base portion.

Implementations of this aspect may include or more of the following features.

In some implementations, one or more of the first teeth can protrude radially from the mounting portion in a first direction. One or more of the first teeth can protrude radially from the mounting portion in a second direction opposite the first direction.

In some implementations, one or more of the second teeth can protrude radially into the channel in a first direction. One or more of the second teeth can protrude radially into the channel in a second direction opposite the first direction.

In some implementations, the first rotational position and the second rotational position can differ by approximately 90°.

In some implementations, the first teeth can be angularly spaced about a circumference of the mounting portion.

In some implementations, the second teeth can be angularly spaced about a circumference of the channel.

In some implementations, the first rotational position and the second rotational position can differ by approximately 45°.

In some implementations, the first teeth and the second teeth can be configured such that when the elongate mounting portion is in a first longitudinal position relative to the base portion, elongate mounting portion and base portion are rotationally locked. Further, when the elongate mounting portion is in a second longitudinal position relative to the base portion, elongate mounting portion and base portion are not rotationally locked.

In general, in another aspect, a hearing protection device includes a base portion, and a mounting portion including a first arm and a second arm, and configured to form first and second positions. The first arm includes a first protrusion proximate to an end of the first arm, and a first support element proximate to another end of the first arm. The second arm includes a second protrusion proximate to an end of the second arm, and a second support element proximate to another end of the second arm. The first arm and the second arm are coupled to each other via a hinge. The first arm and the second arm are configured to move with respect to each other via the hinge. The hearing protection device also includes a plug portion detachably secured to the base portion via the support elements and configured to at least partially insert into a user's ear canal. The plug portion defines a channel. In the first position, the mounting portion biases the first support element and the second support elements against an interior of the channel of the plug portion to secure the plug portion to the base portion. In the second position, the mounting portion biases the first support element and the second support elements away from the interior of the channel of the plug portion to release the plug portion to the base portion.

Implementations of this aspect may include or more of the following features.

In some implementations, the first protrusion and the second protrusion can protrude from the base portion. When the first protrusion and the second protrusion are depressed, the mounting portion can be placed into the first position. When the first protrusion and the second protrusion are released, the mounting portion can be placed into the second position; and

In some implementations, the plug portion can further define an annular groove within the channel. In the first position, the mounting portion can shift the first support element and the second support element into the groove. In the second position, the mounting portion can shift the first support element and the second support element out of the groove.

In some implementations, the mounting portion can further include a spring coupled to the first arm and the second arm. When the first protrusion and the second protrusion are released, the mounting portion can be placed into the second position via a spring force against the first arm and the second arm.

In general, in another aspect, a hearing protection device includes a base portion, and an elongate mounting portion protruding from the base portion. The elongate mounting portion includes an outer sleeve defining a plurality of apertures, a plurality of moveable support elements protruding from the apertures, and a spring element disposed between the support elements. The hearing protection device also includes a plug portion detachably secured to the base portion via the support elements and configured to at least partially insert into a user's ear canal. The plug portion defines a channel. The elongate mounting portion is configured such that when the elongate mounting portion is inserted a first distance into the channel, the support elements into the apertures, and when the elongate mounting portion is inserted a second distance into the channel greater than the first distance, the support elements protrude from the apertures into a recess defined within the channel.

Implementations of this aspect may include one or more of the following features.

In some implementations, the elongate mounting portion can be configured such that when the elongate mounting portion is withdrawn from within the channel by a third distance, the support elements retract into the apertures, when the elongate mounting portion is withdrawn from within the channel by a fourth distance greater than the third distance, the support elements protrude from the apertures.

In some implementations, the elongate mounting portion can further include an inner sleeve disposed within the outer sleeve and surrounding the spring element.

DETAILED DESCRIPTION

Various implementations of a hearing protection device are described herein. One or more of these implementations can be used to protect a user's hearing. For example, a user can position all or part of a hearing protection device into a portion of his ear (e.g., his ear canal). Once positioned, the hearing protection device can reduce or eliminate the amount of sound that reaches the person's ear. This can be useful, for example, to protect the user's hearing in noisy environments, such as automotive races, gun ranges, airports, and construction sites.

In some implementations, a hearing protection device can include multiple different portions. For example, a hearing protection device can include a plug portion that is configured to insert into a user's ear (e.g., into a user's ear canal), and a base portion that is configured to remain outside of a user's ear during use. This can be beneficial, for example, as it allows a portion of the device (e.g., a plug portion) to be inserted into a person's ear to reduce or eliminate noise entering the ear, while allowing another portion of the device (e.g., the base portion) to remain outside of a person's ear such that the device can be physically grasped by a user and removed from the ear after use. This configuration can also provide aesthetic benefits. For example, the portion of the device that remains outside of the ear can include a decorative or aesthetically pleasing design which can be viewed by others during use of the device.

In some cases, these portions can be reversibly coupled to each other, such that a user can separate or detach the base portion from the plug portion, and subsequently reattach the base portion to the plug portion. This can be beneficial, for example, as it allows the user to selectively remove, replace, and/or customize specific portions of the hearing protection device, while keeping the other portions of the hearing protection device intact. For example, a base portion can be replaced to alter the appearance of the device during use, while keeping the same plug portion so that the fit of the device within the user's ear canal remains unchanged. As another example, a plug portion can be replaced to change the fit of the device within the user's ear canal (e.g., by replacing the plug portion with another plug portion having a different size and/or shape), while keeping the same base portion so that the appearance of the device remains the same during use.

An exemplary implementation of a hearing protection device100is shown inFIG. 1A(depicting a front perspective view of the hearing protection device100),FIG. 1B(depicting a rear perspective view of the hearing protection device100), andFIG. 1C(depicting a side view of the hearing protection device100). The hearing protection device100includes a plug portion110and a base portion120.

The plug portion110has a generally frusto-conical shape, and is configured to insert into a user's ear. For example, as shown inFIG. 2, the plug protection device100can be positioned within a user's ear canal200to physically block the ear canal200. Thus, sound entering the ear canal200is attenuated or eliminated by the plug portion110. Further, the plug portion110can also reduce or eliminate dust, pollution, water, and/or wind from entering the ear canal200.

The plug portion110can be constructed using a compressible, flexible, expandable, and/or elastic material. Example of suitable materials include wax, foam, memory foam, vinyl, polyvinyl chloride, polyurethane, acrylic, rubber, plastic, and silicone. A compressible and/or flexible material can be beneficial, for example, as it allows the plug portion110to bend or compress to conform to the physical dimensions of the ear canal200. Thus, the plug portion110can fit more closely and more securely within the ear canal200. In some cases, the plug portion110can be constructed such that its physical dimensions are larger than the ear canal200, but such it can still be compressed to fit within the ear canal200. Once placed in the ear canal200, the plug portion110expands to against the ear canal200. This can be beneficial, for example, as it further secures the plug portion110within the ear canal200.

In some cases, the plug portion110can include a filter that acts as a pressure regulator. For example, the plug portion110can include a porous ceramic filter. One end of the ceramic filter can be exposed to the ambient pressure, and the opposite end can be exposed to the interior of a user's ear. As the ambient pressure changes, a pressure differential is created across the ceramic filter, causing air to flow through the porous filter. The flow of air is impeded by the filter. Thus, the effects of rapid changes in ambient pressure (e.g., as experienced during air travel) are lessened.

Although an exemplary plug portion110is shown inFIGS. 1A-CandFIG. 2, this is merely an illustrative example. In practice, the size and/or shape of the pug portion110can vary, depending on the implementation. For example, instead of a frusto-conical shape, the plug portion110can have some other shape (e.g., a cylindrical shape, a polygonal shape, a conical shape, an arbitrary shape, or some combination thereof).

As another example, in some cases, the plug portion110can be configured such that an entirety of the plug portion110can be inserted into a person's ear. For example, the plug portion110can be sized and shaped such that it can be fully inserted into the ear canal200. In some cases, the plug portion110can be configured such that only a portion of the plug portion110can be inserted into a person's ear. For example, the plug portion110can be sized and shaped such that it cannot be fully inserted into the ear canal200(e.g., having a length and/or width that is too large to allow the plug portion110to fully insert into the ear canal200).

The base portion120has a generally cylindrical shape, and is configured to remain, at least in part, outside of the ear canal200during use. For example, as shown inFIG. 2, when the hearing protection device100is positioned within a user's ear canal200, the base portion120can remain outside of the ear canal200. This can be useful, for example, as it allows the user to physically grasp the base portion120, such that the hearing protection device100can be removed after use. This also allows the user to physically grasp the base portion120to insert the hearing protection device100into the ear canal130, and to adjust its placement once inserted.

As the base portion120remains, at least in part, outside of the ear canal200during use, the base portion120can be configured to have a particular decorative appearance. This can be beneficial, for example, as it allow the user to use the hearing protection device as a piece of decoration, jewelry, or fashion. As an example, as shown inFIGS. 1A-CandFIG. 2, the base portion120has the physical appearance of a bullet. Thus, when the hearing protection device100is inserted into the ear canal200, it appears to be a bullet lodged into the person's ear.

The base portion120can be constructed using of a relatively rigid material. Example materials include plastic, metal, wood, ceramic, stone, crystal, carbon fiber, rubber, rubber or fiber composite materials, glass, and other relatively rigid materials. A rigid material can be beneficial, for example, as it allows the user to grasp the base portion120more securely. However, in some cases, the base portion120can be constructed using a compressible and/or flexible material, either instead of or in addition to a rigid material.

Although an exemplary base portion120is shown inFIGS. 1A-CandFIG. 2, this is also merely an illustrative example. In practice, the size and/or shape of the base portion120can also vary, depending on the implementation. For example, the base portion120can have a cylindrical shape, a polygonal shape, a conical shape, an arbitrary shape, or some combination thereof.

Further, although the base portion120is shown as having the physical appearance of a bullet, in the practice, the physical appearance can also vary. For example, in some cases, the base portion120can have a physical appearance of another object, such as a car, a car tire, a flower, a butterfly, or any other object. In some cases, the base portion120can have a particular color scheme or visual pattern. For example, the base portion120can be painted such that it portrays particular images, text, and/or patterns on its exterior.

As another example, in some cases, the base portion120can be configured such that it is longer, shorter, wider, and/or thinner than shown inFIGS. 1A-CandFIG. 2. Further, in some cases, the base portion120can be configured such that it differs in size relative to the plug portion110. For example, as shown inFIGS. 1A-CandFIG. 2, the base portion120has a smaller diameter than the plug portion110; however, in some cases, the base portion can have the same diameter or a larger diameter than the plug portion110.

In some cases, the plug portion110and the base portion120can be reversibly coupled to each other, such that a user can separate or detach the base portion120from the plug portion110, and subsequently reattach the base portion120to the plug portion110. This can be beneficial, for example, as it allows the user to selectively remove, replace, and/or customize specific portions of the hearing protection device, while keeping the other portions of the hearing protection device intact.

This reversible coupling feature can be provided in various ways. As an example, as shown inFIG. 3, a plug portion110can be coupled to a base portion120through an elongate mounting portion310. The mounting portion310is attached to and protrudes from the base portion120, and is configured to insert into a corresponding channel320defined within the plug portion110. When the mounting portion310is inserted into the channel320, the plug portion110and the base portion120are physically secured to each other. Further, the plug portion110and the base portion120can be physically separated from each other by pulling the plug portion110and the base portion120away from one another.

The mounting portion310can be generally elongate or shaft-like in shape. In some cases, the mounting portion310can have a circular cross-section. In other cases, the mounting portion310can have other cross-sections, such as a polygonal, ovular, or any other shape.

In some cases, the mounting portion310can include variations in thickness (e.g., variations in its diameter) that allow the mounting portion310to fit more securely within the channel320. For example, as shown inFIG. 3, the mounting portion310can initially decrease (e.g., monotonically) in thickness in the direction from the base portion120to a point330a,then increase (e.g., monotonically) in thickness in the direction from the point330ato a point330b,then decrease (e.g., monotonically) in thickness in the direction from the point330bto the end point330cof the mounting portion310. This arrangement provides the mounting portion310with an annular recess about the point330a.Further, the channel320includes an annular ridge322along a wall of the channel320. The ridge322is positioned within the channel320such that when the mounting portion310is inserted into the channel320, the ridge322aligns with the annular recess about the point330a,thereby securing the mounting portion310in place.

The channel320can be generally tube-like in shape. In some cases, the channel320can have a circular cross-section, or some other cross-sectional shape similar to that of the mounting portion310. In some cases, the channel320can be defined by an elastic material, such as rubber, elastic foam, silicone, or elastic plastic. This allows the walls of the channel320to bend outward to accept the mounting portion310during insertion (e.g., as the point330bpasses across the ridge322), and to allow the mounting portion310to be removed (e.g., as the point330bpasses in the opposite direction across the ridge322). In some cases, the diameter of the channel320can be slightly smaller than the diameter of the mounting portion310, such that the channel320bends slightly outward when the mounting portion310is inserted into it. This can be beneficial, for example, as it further secures the mounting portion310within the channel320(e.g., through friction).

In some cases, the channel320can be defined by an elastic sleeve or spine that is embedded within the plug portion110. In some cases, the elastic sleeve or spine can be constructed from the same material as the plug portion110. In other cases, the elastic sleeve or spine can be constructed from a different material than the plug portion110. For example, in some cases, the sleeve or spine can be construed from an elastic or flexible material (e.g., rubber), and can be surrounding by a compressible material (e.g., foam).

Although exemplary mounting portion310and corresponding channel320are shown inFIG. 3, this is merely an illustrative example. In practice, the mounting portion310and the channel320can differ, depending on the implementation. For example, in some cases, the mounting portion310can increase and/or decrease in thickness any number of times in succession in the direction from the base portion120.

As another example, as shown inFIG. 4, a plug portion110can be coupled to a base portion120through an elongate mounting portion410. In general, the plug portion110, the base portion120, and the mounting portion410can be similar to that shown inFIG. 3. For example, the mounting portion410is attached to and protrudes from the base portion120, and is configured to insert into a corresponding channel420defined within the plug portion110. When the mounting portion410is inserted into the channel420, the plug portion110and the base portion120are physically secured to each other. Further, the plug portion110and the base portion120can be physically separated from each other by pulling the plug portion110and the base portion120away from one another.

In this example, however, the mounting portion410includes two annular protrusions422aand422balong its length. Further, the channel420includes two annular recesses424aand424balong a wall of the channel420. The recess424aand424bare positioned within the channel420such that when the mounting portion410is inserted into the channel420, the recesses424aand242balign with the annular protrusions422aand422b,respectively, thereby securing the mounting portion410in place.

Although two protrusions and two recesses are shown, this is merely an illustrative example. In practice, any number of protrusions and recesses can be used, depending on the implementation. For example, in some cases, a mounting portion can include one, two, three, four, or more protrusions, and the plug portion110can include one, two, three, four, or more corresponding recesses in a channel.

As another example, as shown inFIG. 5A, a plug portion110can be coupled to a base portion120through a clamp mechanism510. The clamp mechanism510is disposed, at least in part, with the base portion120. The clamp mechanism510includes several clamp elements512, a button514, and a spring516disposed about the proximity of the clamp elements512and proximate to the button514. The clamp elements512, the button514and the spring516can be disposed, at least in part, within a channel518defined within the base portion120.

The clamp elements512are constructed from a flexible shape-memory material (e.g., alloys of zinc, copper, gold and/or iron) and have a “memory” corresponding to a relatively open or fanned out shape. As a result, the clamp elements512can be longitudinally shifted further into the channel518to grip the plug portion120, and shifted further out of the channel518is release the plug portion120. In some cases, the clamp elements512can collectively have a substantially cylindrical cross section within the channel518, and a fanned out arrangement outside of the channel518.

To illustrate, as shown inFIG. 5A, when the clamp mechanism510is in a closed position, the ends520of the clamp elements512are positioned relatively deep within the channel518(e.g., near the button514). As described above, the clamp elements512have a “memory” corresponding to a relatively open or fanned out shape, and thus, will be physically biased towards an open or fanned out arrangement. However, due to the spring force of the spring516, the clamp elements512are biased in the direction of the button514(i.e., in the left direction ofFIG. 5A). As a result, a relatively large portion of each clamp element512is constrained within the channel518, causing the gripping edges522of clamp elements512to be tightly clamped against the plug portion110, and thereby securing the plug portion110to the base portion120. Further, the spring516biases the button514outward from the base portion120, such that it protrudes from the base portion120.

As shown inFIG. 5B, the clamp mechanism510can be shifted to an open position to remove the plug portion110from the clamp elements512. This can be performed, for example, by a user manually pressing the button514such that it moves further into the plug portion110. The movement of the button514compresses the spring516against a spring wall524, and forces or shifts the clamp elements512further out of the channel518from the opposite end (i.e., in the right direction ofFIG. 5B). As a result, the clamp elements512are no longer as physically restricted within the channel518. Because of their shape memory, the clamp elements512can open further outward, thereby releasing the plug portion110from the gripping edges522.

The clamp mechanism510can be returned to the closed position by releasing the button514. The spring516again biases the button514outward from the base portion120, and allows the end520of the clamp elements512to shift further into the channel518(i.e., in the left direction ofFIG. 5A). As a result, the clamp elements512are again shifted further into the channel518, and the clamp elements512again clamp inward (e.g., against the plug portion110).

Although four clamp elements512are shown, in practice, any number of clamp elements512can be used. For example, in some cases, the clamp mechanism510can include two, three, four, five, or more clamp elements512. Further, although shape-memory metals are described above, in some cases, the clamp elements512can be made from other materials, such as aluminum, steel, iron, plastic, sterling silver, silver, titanium, and/or other materials.

As another example, as shown inFIG. 6, a plug portion110can be coupled to a base portion120through a mounting mechanism610. The mounting mechanism610is disposed within a channel612defined within the base portion120, and includes an elongate shaft member614and several support elements616positioned along a periphery of the shaft member614. The mounting mechanism610also includes a spring618positioned along a periphery of the shaft member614, a button620that protrudes from base portion120, and an outer sleeve622that houses the spring618, the shaft member614, and the support elements616.

The shaft member614is configured to longitudinally shift within the channel612(e.g., as indicated by the double-headed arrow624). However, the spring618biases the shaft member614inward into the base portion120(e.g., in the direction of the button620). As shown inFIG. 6, in this position, the support elements616as disposed along an outer periphery of the shaft member614, and thus are radially biased by the shaft member614such that they protrude from apertures626of outer sleeve622of the mounting mechanism610.

However, when the button620is pressed inward into the base portion120, the force upon the button620compresses the spring618, causing the shaft member614to move outward from the base portion120(e.g., away from the button620). This movement aligns an annular recess or groove628on an outer circumstance of the shaft member614with the support elements616. As a result, the support elements recess into the annular recess or groove628and retract from the apertures626of the outer sleeve622. Thus, when the button620is pressed, the support members616no longer protrude from the outer sleeve622.

The mounting mechanism610can be used to securely and reversibly couple the base portion120to the plug portion110. For example, to mount the base portion120to the plug portion110, a user can press the button620, causing the support elements616to retract. Thus, the outer sleeve622can be freely inserted into a corresponding channel630defined within the plug portion110. When the button620is released, the support elements616are radially biased by the shaft member614, and thus protrude from the outer sleeve622. These support elements616are retained by corresponding recesses632defined within the channel630and protrude against the interior of channel640. Thus, the protruding support elements618secure the mounting mechanism610in place within the channel630, thereby coupling the base portion120to the plug portion110. To release the base portion120from the plug portion110, a user can again press the button620—which causes the support elements616to be radially biased away from the channel and retract—and pull the base portion120away from the plug portion110.

As another example, as shown inFIG. 7A, a plug portion110can be coupled to a base portion120through a mounting mechanism710. The mounting mechanisms710is shown in cross-section inFIGS. 7B and 7C.

The mounting mechanism710is coupled to the base portion120, and includes an outer sleeve712, a gear714disposed within the outer sleeve712, and several support elements716that protrude from apertures718of the outer sleeve712.

The gear714is configured to rotate with respect to the outer sleeve712and the support elements716. The rotational position of the gear714can be selected by a user. For example, the gear714can be rotationally locked to the base portion120, such that when the base portion120is rotated with respect to the outer sleeve712, the gear714rotates with the base portion120.

As shown inFIG. 7B, when the gear714is in a first rotational position relative to the outer sleeve712, the support elements716are aligned with recesses or grooves720of the gear714. Thus, the support elements716retract from the outer sleeve712.

As shown inFIG. 7C, when the gear714is in a second rotational position relative to the outer sleeve712, the support elements716are positioned along the teeth722of the gear714. Thus, the support elements716protrude from the apertures718of the outer sleeve712.

The mounting mechanism710can be used to securely and reversibly couple the base portion120to the plug portion110. For example, to mount the base portion120to the plug portion110, a user can rotate the gear714relative to the outer sleeve712(e.g., by rotating the base portion120) such that the gear714is in a first rotational position relative to the outer sleeve712(e.g., as shown inFIG. 7B). This causes the support elements716to retract. Thus, the outer sleeve712can be freely inserted into a corresponding channel730defined within the plug portion110. To secure the plug portion110to the base portion120, the user rotates the gear714relative to the outer sleeve712(e.g., by rotating the base portion120) such that the gear714is in a second rotational position relative to the outer sleeve712(e.g., as shown inFIG. 7C). This causes the support elements716to be radially biased by the gear714, and thus protrude from the outer sleeve712. These support elements716are retained by corresponding recesses732defined within the channel730and protrude against the interior of channel730. Thus, the protruding support elements716secure the mounting mechanism710in place within the channel730, thereby coupling the base portion120to the plug portion110.

To release the base portion120from the plug portion110, a user can again rotate the gear714relative to the outer sleeve712(e.g., by rotating the base portion120) such that the gear714is in the first rotational position relative to the outer sleeve712(e.g., as shown inFIG. 7C). This causes the support elements618to be radially biased away from the channel and retract. The user can then pull the base portion120away from the plug portion110.

Three support elements716are shown inFIGS. 7B and 7C, each of which are equally distributed about a periphery of the gear714. Thus, in this example, the first rotational position differs from the second rotation position by approximately 60°. However, in practice, any number of support elements716can be used (e.g., one, two, three, four, or more). Further, although the support elements716are shown as being equally distributed about a periphery of a gear714, in practice, support elements716can be distributed in different patterns, such that the user can rotate the gear714a greater amount (e.g., more than 60°) or a lesser amount (e.g., less than 60°) to retract and/or deploy the support elements716from the outer sleeve712.

As another example, as shown inFIG. 8, a plug portion110can be coupled to a base portion120through magnets802and804mounted on or within the plug portion110and the base portion120, respectively. For example, the magnet802can be positioned such that its outer face has one polarity (e.g., “north”), while the magnet804can be positioned such that its outer face has the opposite polarity (e.g., “south”). Thus, when the plug portion110and base portion120are positioned against each other, the outer faces of the magnets802and804attract one another and physically couple the plug portion110to the base portion120.

In some cases, the magnets802and804can be mounted within recesses806and808defined in the plug portion110and base portion120, respectively. In some cases, the magnets802and804can be mounted to a periphery of the plug portion110or base portion120.

Although two magnets are shown inFIG. 8, in practice, any number of magnets can be used (e.g., two, three, four, five, or more magnets). Further, the position of the magnets can vary from that shown inFIG. 8. For example, instead of positioning magnets to a cross-sectional center of the plug portion110and/or base portion120, magnets can be positioned along a periphery of the plug portion110and/or base portion120.

As another example, as shown inFIGS. 9A-C, a plug portion110can be coupled to a base portion120through an elongate mounting portion910. The mounting portion910is attached to and protrudes from the base portion120, and includes several teeth912extending in opposites directions from the mounting portion910.

The mounting mechanism910can be used to securely and reversibly couple the base portion120to the plug portion110. For example, as shown inFIG. 9B, to mount the base portion120to the plug portion110, a user can rotate the base portion120such that the teeth912are aligned with a channel920defined within the plug portion110. The user then inserts the mounting portion910into the channel920.

As shown inFIG. 9C, to secure the base portion120to the plug portion110, the user rotates the base portion120such that the teeth912interlock with teeth922protruding from the channel920. As a result, the teeth912are physically locked into place between the teeth922, thereby coupling the base portion120to the plug portion110.

To separate the base portion120from the plug portion110, the user can rotate the base portion120with respect to the plug portion110such that the teeth912and922are no longer interlocked, and pull the base portion120away from the plug portion110.

Although six teeth912are shown inFIGS. 9A-C, this is merely an illustrative example. In practice, the mounting portion910can include any number of teeth (e.g., one, two, three, four, or more). Similarly, although eight teeth922are shown inFIGS. 9B and 9C, this is also merely an illustrative example. In practice, the channel920can include any number of teeth (e.g., one, two, three, four, or more).

Further, inFIGS. 9A-C, the teeth912are depicted as extending in opposite directions from the mounting portion910. As a result, the base portion120can be rotated approximately 90° relative to the plug portion to secure the base portion120to the plug portion110(and correspondingly, rotated another approximately 90° to separate the two). In practice, however, the teeth912and can be distributed in different patterns, such that the user can rotate the base portion120a greater amount (e.g., more than 90°) or a lesser amount (e.g., less than 90°) to secure and/or release the base portion120from the plug portion110. For example, in some cases, the user can rotate the base portion120by approximately 45° to secure and/or release the base portion120from the plug portion110.

As another example, as shown inFIGS. 10A-D, a plug portion110can be coupled to a base portion120through an elongate mounting portion1010. The mounting portion1010is generally similar to the mounting portion910shown inFIGS. 9A-C. For example, the mounting portion1010is attached to and protrudes from the base portion120, and includes several teeth1012extending from the mounting portion1010.

In this example, however, the teeth1012extend in four different directions from the mounting portion1010, and are equally distributed about the periphery of the mounting portion1010. This is shown, for example, inFIG. 10B, which depicts a longitudinal view (e.g., head on view) of the mounting portion1010.

The mounting mechanism1010can be used to securely and reversibly couple the base portion120to the plug portion110. For example, to mount the base portion120to the plug portion110, a user can rotate the base portion120such that the teeth1012are aligned with a channel1020defined within the plug portion110. The user then inserts the mounting portion1010into the channel1020. The channel1020is shown in greater detail inFIG. 10C, which depicts a longitudinal view (e.g., head on view) of the channel1020.

To secure the base portion120to the plug portion110, the user rotates the base portion120such that the teeth1012couple with teeth1022protruding from the channel1020. As a result, the teeth1012are physically locked into place by the teeth1022, thereby coupling the base portion120to the plug portion110.

In some cases, the teeth1012can include structural elements that rotationally lock the base portion120to the plug portion110when the base portion120and the plug portion110are coupled together. To unlock the base portion120from the plug portion110, a user can apply a longitudinal force (e.g., by longitudinally displacing the base portion120further into the plug portion110) as he is applying a rotational force to the base portion120. This can be useful, for example, as it further secures the base portion120to the plug portion110, and reduces or eliminates accidental decoupling when the base portion120and/or plug portion110are touched by the user.

This functionality can be provided through longitudinal protrusions that extend from each of the teeth1012. For example, as shown inFIG. 10D(showing a flattened view of the mounting portion1010), the mounting portion1010can include teeth1012, each of which includes a longitudinal protrusion1014. When the teeth1012are locked with the teeth1022of the channel1020, the teeth1022rest within recesses1016formed by the longitudinal protrusions1014and the teeth1012. To release the teeth1022from the recesses1016, the teeth1012and longitudinal protrusions1014must be shifted longitudinally (e.g., in the direction of arrow1018), such that the teeth1022clear the end of the longitudinal protrusions1014. Thus, when the base portion120is locked to the plug portion110, the two cannot freely rotate with respect to one another until a longitudinal force is also applied.

Although four teeth1012are shown inFIGS. 10A-D, this is merely an illustrative example. In practice, the mounting portion1010can include any number of teeth (e.g., one, two, three, four, or more).

As another example, as shown inFIGS. 11A and 11B, a plug portion110can be coupled to a base portion120through a mounting mechanism1110disposed within the base portion120.

As shown inFIG. 11A, the mounting mechanism1110includes two arms1112aand1112bcoupled via a hinge1114and a spring1126. The arm1112aincludes a protrusion1116aproximate an end of the arm1112a,and the arm1112bincludes a protrusion1116bproximate an end of the arm1112b.The protrusions1116aand1116bextend from a periphery of the base portion120(e.g., protrude out from the base portion120as buttons). The arm1112aalso includes a support element1118apositioned proximate to an end of the arm opposite the protrusion1114a.Likewise, the arm1112bincludes a support element1118bpositioned proximate to an end of the arm opposite the protrusion1114b.

The mounting mechanism1110can be used to securely and reversibly couple the base portion120to the plug portion110. For example, as shown inFIG. 11B, to mount the base portion120to the plug portion110, a user can press the protrusions1116aand1116binto or towards the base portion120. This force causes the arms1112aand1112bto move with respect to the hinge. As a result, the support elements1118aand1118bare moved towards each other and closer together, and can be inserted into channel1122defined within the plug portion110.

The user inserts the mounting portion support elements1118aand1118bin the channel1120, and releases the protrusions1116aand1116b.The spring1126biases the arms1112aand1112bback towards their original positions. As a result, the support elements1118aand1118bmove away from each, and thus, are radially biased against the channel1120and rest within recesses1124defined within the channel1122. Thus, the base portion120is securely coupled to the plug portion110.

To release the base portion120from the plug portion110, the user again presses the protrusions1116aand1116binto the base portion120. This force causes the arms1112aand1112bto again move with respect to the hinge. As a result, the support elements1118aand1118btowards each other. Thus, the support elements1118and1118bare radially biased away from the channel and retract from the recesses1124. Thus, the plug portion110and the base portion120can be physically separated from one other by pulling the plug portion110and the base portion120away from one another.

Although two support elements1118aand1118bare shown inFIGS. 11A and 11B, this is merely an illustrative example. In practice, the mounting mechanism1110can include any number of support elements (e.g., one, two, three, four, or more). For example, in some cases, the mounting mechanism1110can include two longitudinally spaced support elements coupled to the arm1112aand two longitudinally spaced support elements coupled to the arm1112b.Correspondingly, the channel11221220can define multiple longitudinally spaced recesses (e.g., along the length of the channel1122) to receive the support elements.

As another example, as shown inFIG. 12, a plug portion110can be coupled to a base portion120through a mounting mechanism1210.

The mounting mechanism1210is coupled to the base portion120, and includes an outer sleeve1212, a spring1214disposed within the outer sleeve1212, and support elements1216that protrude from apertures1218of the outer sleeve1212. The spring1214is enclosed by an inner sleeve1224positioned within the outer sleeve1212.

The mounting mechanism1210can be used to securely and reversibly couple the base portion120to the plug portion110. For example, to mount the base portion120to the plug portion110, a user can insert the outer sleeve1212into a corresponding channel1220defined within the plug portion110. As the outer sleeve1212enters the channel1220, the support elements1216are forced towards each other and against the bias of the spring1214by the walls of the channel1220. As a result, the support elements1216retract into the apertures1216(e.g., into the inner sleeve1224).

Once the outer sleeve1212is inserted sufficiently far into the channel1220, the support elements1216become aligned with recesses1222in the channel1220. Due to bias of the spring1214, the support elements1216protrude from the apertures1218and into the recesses1222. Thus, the protruding support elements1216secure the mounting mechanism1210in place within the channel1220, thereby coupling the base portion120to the plug portion110.

To release the base portion120from the plug portion110, a user can pull the base portion120away from the plug portion110. As the outer sleeve1212exits the channel1220, the support elements1216are again forced towards each other and against the bias of the spring1214by the walls of the channel1220, and retract into the apertures1218(e.g., into the inner sleeve1224). Thus, the base portion120can be detached from the plug portion110.

Although two support elements1216are shown inFIG. 12, this is merely an illustrative example. In practice, the mounting mechanism1210can include any number of support elements (e.g., one, two, three, four, or more). Further, although a single spring1214is shown, in practice, there may be any number of springs (e.g., one, two three, four, or more) positioned either with a single support element alone or between multiple different support elements.

Although several different mechanisms for securing a base portion120to a plug portion110are described, these are merely illustrate examples. In practice, other mechanisms can also be used, either in addition to or instead of those described herein.

Further, although example hearing protection devices as illustrated in the figures above, these are merely illustrative examples, and may not be drawn to scale. In some cases, certain portions of the hearing protection devices may be enlarged or exaggerated to better depict certain structural features. Accordingly, implementations of the hearing protection devices can differ in size and shape, depending in on the implementation.

A number of embodiments have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the disclosure. Accordingly, other embodiments are within the scope of the following claims.