RU2789400C2 - Anti-noise inserts with cord - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: invention relates to medical equipment, namely to cast set (300) of anti-noise inserts. The set contains two anti-noise inserts (302, 304), each of which has rod (332, 334) with cord or cable (306) passing between rods for connection of anti-noise inserts to each other. The cord may be cast as a single whole with anti-noise inserts and pass sideways from the rod of each anti-noise insert. Sides of the cord can be connected, forming essentially flat cord body (72), and can be defined with grooves made in the cord body. The specified set may contain container (308) for storage of anti-noise inserts, cast as a single whole and containing two cap elements (314, 316) separated from each other with hinge (322). Gripping element (310) cast as a single whole may be provided for blocking of cap elements in a closed position in such a way that they rest against each other. The set may contain brittle jumpers (342) connecting anti-noise inserts to the cord body. Each anti-noise insert may contain a grip containing a set of recesses.

EFFECT: obtainment anti-noise inserts with a cord.

15 cl, 33 dwg

Description

Cross-references to related applications

This application claims priority of South African Provisional Patent Application No. 2018/03406, filed May 23, 2018, which is incorporated herein by reference in its entirety.

The field of technology to which the invention belongs

The present invention relates to earplugs which are designed to protect the wearer's hearing from loud noise.

State of the art

Earplugs are devices designed to be inserted into a wearer's ear canals to protect the wearer's hearing from loud noise, water, foreign bodies, dust, excessive wind, or the like. There are several types of earplugs, each with its own features, advantages and disadvantages.

Противошумные вкладыши описаны в следующих патентных заявках на полезную модель и промышленный образец США: 4314553, 4867149, 4936411, 5113967, 5668354, 5727566, 6241041, 7314047, 7537011, 7967015, 8118031, 8291911, 8897458, 9155661, 10034798, US2006/0162992A1, US2006 /0213525A1, US2008/011308A1, D 298356, D 492765 S, D 560792 S and D 802555 S.

The present invention relates generally to earmolds of this type which protect the wearer's hearing from loud noise. The present invention also relates to earmolds that include at least one flange configured to contact the wearer's external ear canal to substantially close it and hold the earmuffs in place therein. Such earmolds may include a housing that defines a shaft by which the earmold can be manipulated and placed in or removed from the wearer's ear. In the remainder of this description, such earmolds are referred to as "flange earmolds".

Flanged earmolds are often used in manufacturing environments, particularly factories, and are usually supplied in pairs connected by a cord that attaches to the respective earmold housings. The specified cord allows you to keep the set of earplugs intact, preventing the loss of one or both of them. It also allows earplugs to be hung around the neck after being removed from the wearer's ears when the use of earplugs is not required.

Earmuffs are usually produced by injection molding, in particular, when made from a polymer or silicone material. A limitation of this casting process is that the part cycle time is highly dependent on the time it takes to dry, solidify, or cure (in the prescribed manner) the cast material, which in turn depends on the maximum thickness part of the part. The stem of flanged earmolds typically has a diameter of about 5 mm and also usually contains a socket. During casting, this socket is formed using a steel pin. Such a steel pin cannot quickly remove heat from the part due to the relatively small diameter, which is about 1.5 mm, and which corresponds to the size of the cavity formed. For this reason, polymeric material injected into an injection mold at a temperature of about 220°C requires a significant amount of time to cool and cure, after which the part can be demoulded. The socket in the shaft is required for the cord to be inserted into it, so its size cannot be increased without additional complications. Some earmuffs contain an additional piece between the cord and stem that allows a larger diameter steel pin to be used in the casting process, thus reducing cooling time. However, it is clear that an additional part may lead to additional production requirements, as well as to the cost of manufacturing the part and assembly, which is undesirable.

A significant disadvantage of using a cord in bonded flanged earmolds is that, as stated above, the cord is inserted after casting, requiring additional processing steps, time and tools, or unskilled workers if the cord is inserted by hand. The socket in the stem of the earplugs into which the cord is inserted increases the cycle time, as explained above, while winding up the cord after manufacture further increases complexity and production costs. The additional polymeric material used to make the cord can also cause recycling problems due to the use of a material different from that of the earplugs themselves. If the corded flanged earmolds contain a cord retainer, cord tie and storage case, this problem may be more significant.

Known cords for earmuffs are usually made by braiding or extrusion. As a result of weaving, solid multi-strand cords of constant cross section are obtained, which are relatively good conductors of sound waves. The extrusion produces a solid solid cord of constant cross section, which is also a relatively good conductor of sound waves. Even rubbing such cords against, for example, the wearer's clothing, can cause sound waves to travel along the cord into the wearer's ear.

An additional problem with prior art earmolds is their storage between uses. Earplugs can be supplied in separate cases as above, but they can be easily lost. Corded earplugs can simply be placed in the wearer's pocket, providing at least some form of protection, but this often leads to tangling of the cord. Leaving corded earplugs hanging around the wearer's neck offers little or no protection. In both of these scenarios, dust or similar material may be deposited on the flange surfaces, especially if they contain earwax. This may result in unwanted substances entering the user's ear canal during subsequent use, which may cause irritation or infection.

In addition, in existing earmolds, the flanges may not provide optimal noise isolation, so the flanges must be made larger or more material must be used to make the flanges than would otherwise be required.

The previous discussion of the background of the invention is only intended to facilitate understanding of the present invention. It should be understood, however, that this discussion is not an acknowledgment or admission that any of the referenced material was part of the common knowledge in the art as of the priority date of the application.

Disclosure of the essence of the invention

In accordance with a first aspect of the invention, there is provided a molded set of earmuffs comprising two earmuffs each comprising a grip forming rod at one end and a nose protrusion at the opposite end with at least one sound absorbing element provided near the nose end with a cord or a cable passing between the earplugs to connect them to each other, and characterized in that the cord is molded as a single unit with each earmold.

The cord can pass between the rods of the earplugs and can be molded integrally with them.

The kit may include at least one container for storing earplugs, said storage container being integrally molded with the earplugs.

The grip of each of the two anti-noise inserts may contain on the outer surface a plurality of recesses or depressions, which can be located along its length so that the distance from each point of the rod to the outer surface of the grip is less than the radius of the rod.

The grip of each of the two anti-noise inserts may contain at least one elongated ridge extending in the longitudinal direction along a part of the length of the grip, and at least three partitions located at a distance from each other, protruding, as a whole, in the transverse direction from the specified elongated ridge, wherein the ridge and baffles define a plurality of recesses or recesses provided along the length and around the outer surface of the grip.

The stem of each of the two earmuffs may define a central longitudinal axis, wherein at least a portion of the cord may extend laterally from the side of the earmuff in a direction transverse to the central longitudinal axis of the stem.

The cord can run laterally from the side of the rod.

Instead, a cord may extend from the end of each rod.

The cord may be provided in a folded or coiled form. The sides of the cord may be connected to each other to form the body of the cord. The sides of the cord may be defined by grooves or lines of weakness in the cord body which allow the cord body to be torn along them to form a cord. Said grooves or lines of weakness may be molded into the body of the cord. Said grooves or lines of weakness may be pressed into the body of the cord. Said grooves or lines of weakness may be cut into the body of the cord. The body of the cord has a substantially flat or cylindrical shape.

The kit may include at least one frangible link connecting at least one of the earplugs to the body of the cord. In preferred embodiments, the kit may include a plurality of frangible straps connecting both earplugs to the body of the cord. So, for example, a kit may contain four jumpers, two for each earmold. Each web may extend between one of the two earmolds and the innermost turn of the cord body, and may also extend from either the nose lip or the grip of the earmold shaft to which it is connected.

These straps stabilize the earplugs against the body of the cord before using the earplug set for the first time. To enable first use, the tabs can be broken by the user so that each of the two earbuds detaches from the side of the innermost turn of the cord body, however, the earbuds remain connected to each other via the cord.

The sound absorbing element may be a flange.

According to a further aspect of the invention, there is provided an anti-noise insert device which comprises at least one anti-noise insert comprising a shaft which has a grip at one end and a nose protrusion at the opposite end and is provided with at least one sound-absorbing element provided near the nose end with a cord, passing from the anti-noise insert, characterized in that the cord is molded as a single unit with the anti-noise insert.

The cord can be molded as a single piece with the stem of the earplug.

According to a further aspect of the invention, there is provided an anti-noise insert device which comprises at least one anti-noise insert comprising a shaft which has a grip at one end and a nose protrusion at the opposite end and is provided with at least one sound-absorbing element provided near the nose end, characterized in that that the at least one container for storing the earmuff is integrally molded with the earmuff.

With respect to both the set of earplugs and the earmuff, the storage container may include a cavity for receiving at least the nose end and the sound absorbing member of the at least one earmold. The container may contain two cavities. At least one of the earplugs may comprise a positioning element, and at least one cavity may define a positioning element receiving portion configured to receive and hold the positioning element. The container may include a lid to at least partially cover the nasal protrusion and a sound-absorbing element of at least one anti-noise insert within the cavity or cavities. The lid may include a locking element for locking the lid in the closed position.

The container may extend from the grip or from a cord extending from the grip of the at least one earplug. A pair of earplugs may be integrally molded with the cord, and a container for each earmold may also be molded integrally with the cord. Therefore, the storage container may be integrally molded with the stem of one or each earmuff by means of a cord, such that the container, the cord, and one or both of the stems are integrally molded with each other.

The container may be foldable inwards. The container can be foldable like an accordion or have a telescopic design.

For a set of earmuffs and those earmuff embodiments that include a pair of earmuffs, the storage container may comprise:

first and second cap elements, each of which forms a cavity for accommodating at least part of one of the anti-noise inserts,

hinge means provided between said first and second cap elements, allowing the cap elements to be rotated relative to each other to a closed position in which the cap elements are adjacent to each other and the cavities they form face each other, and

blocking means for blocking with the possibility of unlocking the cap elements in the specified closed position.

The hinge means may comprise, for example, an elastically deformable part of the storage container located between the first and second cap elements.

The locking means may include a gripping element and a complementary element engaging with the gripping element, molded as a single unit with the cap elements. The element engaging with the gripping element may be formed by at least part of one of the cap elements.

Said tack element may comprise a substantially flat strip and at least one resiliently deformable bending element protruding outward from said flat strip. During use, deformation of one or more bending elements by the user may provide a temporary elastic increase in the surface area of the clamping element from the first, basic surface area to the second, expanded surface area, which facilitates the engagement of the clamping element with the element interacting with it. In this case, one or more of these bending elements can contribute to an increase in elasticity and additional elongation of the clamping element during its stretching. The bending element may also provide a reduction in the tension of the clamping element when it is engaged with a complementary element interacting with it.

According to a further aspect of the invention, there is provided an anti-noise insert device which comprises at least one anti-noise insert comprising a shaft which defines a central longitudinal axis and comprises a grip at one end and a nose protrusion at the opposite end with at least one sound-absorbing element provided near the nose end. , as well as a cord or cable extending from the anti-noise insert, characterized in that at least part of the cord extends laterally from the anti-noise insert in a direction transverse to the central longitudinal axis of the rod.

The cord can run laterally from the side of the rod.

A cord extending laterally from the rod may be connected to the side of the rod at a distance from the nose end of the rod, which does not exceed 25 mm, and is usually about 19 mm. Due to this design, during use of the earbud, at least a portion of the cord can lean against the earlobe and/or cheek of the wearer of the device, and thus suppress sound waves and other vibrations that might otherwise be transmitted along the cord to the wearer. user's ear.

According to a further aspect of the invention, there is provided an anti-noise insert device which comprises at least one anti-noise insert comprising a shaft which comprises a grip at one end and a nose protrusion at the opposite end with at least one sound-absorbing element provided near the nose end, characterized in that the grip contains at least one elongated ridge extending in the longitudinal direction along a part of the length of the grip, and at least three partitions located at a distance from each other, protruding essentially in the transverse direction from the specified elongated ridge, while the ridge and partitions limit a plurality of recesses or recesses provided along the length and around the grip.

According to a further aspect of the invention, there is provided an anti-noise insert device which comprises at least one anti-noise insert comprising a shaft which comprises a grip at one end and a nose protrusion at the opposite end with at least one sound-absorbing element provided near the nose end, and characterized in that that the outer surface of the grip contains a plurality of recesses or recesses that are located along the length of the grip, so that the distance from any point of the rod to the outer surface of the grip is less than the radius of the rod.

The grip of the anti-noise insert may include at least one elongated ridge extending longitudinally along the length of the grip and at least three spaced baffles protruding from the ridges in a substantially transverse direction, the ridge and baffles delimiting a plurality of recesses or recesses along the length and around the grip.

In preferred embodiments, the grip comprises four ridges and five baffles along the length of the grip that together define sixteen recesses.

Said recesses may be formed by at least one element selected from the group consisting of channels, grooves, depressions or the like. A protrusion may be provided near the end of the gripper to facilitate gripping by the user when grabbing the gripper.

More than one sound absorbing element may be provided near the nose end of the rod. Each of the sound absorbing members may include a flange. Said flanges may be arranged along the shaft at intervals between them and with a gradual increase in size, with the smallest flange located on or near the nose ledge.

From the gripping end of the rod, a socket can extend inside the rod. Said socket may be configured to insert a complementary cord into it in a frictional fit. The diameter of the socket may be from about 0.1 mm to about 2.0 mm inclusive, said diameter may be about 1.5 mm.

Two earplugs can be provided as part of the kit. These two earplugs in the kit can be connected to each other with a cord.

Flanges may be domed. The free ends of the domes can be directed towards the capture.

According to a further aspect of the invention, there is provided an anti-noise insert device which comprises at least one anti-noise insert, comprising a shaft having a grip at one end and a nose protrusion at the opposite end, with at least one sound-absorbing element provided near the nose end, and at the same time on the surface at least one sound-absorbing element is provided with sound-diffusing elements.

Sound-diffusing elements may only be provided on the sound-absorbing element closest to the grip.

The sound-diffusing elements may be made in the form of elements selected from the group consisting of ribs, tetrahedral shapes, irregular shapes, surface texturing, and the like.

More than one sound absorbing element may be located near the nose end of the rod. The sound-diffusing elements may be provided on one or more sound-absorbing elements, while the sound-diffusing elements may be provided only on the outermost element. The sound absorbing element (or each sound absorbing element) may comprise a flange. Such flanges may be spaced along the hull and may gradually increase in size, with the smallest flange located on or near the nose lip.

Flanges may be domed. The free ends of the domes can be directed towards the capture.

According to a further aspect of the invention, a cord or cable is provided for a set of earplugs, characterized in that sound-reflecting elements are provided on its surface.

The elements may protrude inward or outward from the outer surface of the cord. The height of the protrusion may be from about 0.1 mm to about 0.4 mm inclusive, the height may be about 0.2 mm. These elements may be spaced along the length of the cord at a distance of about 0.5 mm to about 4 mm (inclusive), they may be spaced at a distance of about 2 mm from each other. These elements can be made inclined, and thus the higher side of the inclined element is located near the end of the cord, and the lower side - near the center of the cord.

Each of the elements may have a shape selected from the group consisting of a triangular, conical, trapezoidal, non-straight-edged conical, curved-edged triangular, or associated truncated conical shape. These elements can be arranged so that the top of one element faces the base of the adjacent element.

According to a further aspect of the invention, there is provided a method for molding an earmuff device, which comprises at least the step of providing an injection mold and the step of curing a polymeric material in said mold, characterized in that said mold forms a cavity for molding an earmuff and a cavity for molding a cord, In doing so, said cavities communicate with each other to allow the earmold and cord to be molded as a single unit.

The earplugs, cords, and storage containers or cases described above may be made from a polymeric material, such as thermoplastic elastomer or silicone rubber.

Said polymeric material may preferably contain a short chain polymer which requires lower molding pressures of the order of 700 bar compared to pressures of the order of 1200 bar required for long chain polymers used in some types of anti-noise liners.

Fillers or other suitable additives may be mixed with the polymeric material to dampen the acoustic conductance of the components of earmuff kits, such as cord conduction. This can be useful in reducing unwanted noise that would otherwise be transmitted through the cords to the user's ears, such as noise caused by the cord moving over the user's body during use.

For a better understanding of the present invention and to illustrate the possibilities of its practical implementation, embodiments of the invention are described below using non-limiting examples with reference to the accompanying schematic drawings.

Brief description of the drawings

The drawings show:

FIG. 1 is a schematic three-dimensional view of an embodiment of an earmuff device according to one aspect of the invention, which, among other features, comprises a plurality of recesses or recesses located along a grip portion of the earmuff,

FIG. 2 is a schematic three-dimensional view of an embodiment of an anti-noise in-ear device according to a further aspect of the invention, which, among other features, comprises sound-diffusing elements,

FIG. 3 is a schematic three-dimensional view of another embodiment of a set of earplugs which, among other features, contains a different type of sound-diffusing elements,

FIG. 4 is a schematic three-dimensional view of an embodiment of an earplug according to a further aspect of the invention, which, among other features, comprises a cord that is integrally molded with two earplugs and connects them to each other,

FIG. 5 is a schematic 3D view of another embodiment of a set of earplugs with a cord molded as one piece with the earmuffs,

FIG. 6 is a schematic three-dimensional view of a further embodiment of a set of earplugs with a cord integrally molded therewith,

FIG. 7 is a schematic side view of the set of earplugs of FIG. 6,

FIG. 8 is a schematic top view of a cord according to a further aspect of the invention, where the cord, cast as a single unit, is in the form of a spirally wound disc-shaped ring and contains a line of attenuation and sound-reflecting elements,

FIG. 9 is a schematic plan view of an embodiment of a set of earplugs comprising, among other features, a combination of the features shown in FIG. 6-8,

FIG. 10 is a schematic 3D bottom view of the set of earplugs of FIG. 9,

FIG. 11 is a schematic plan view of an embodiment of a set of earplugs according to a further aspect of the invention, said set comprising, among other features, a container for storing earmuffs,

FIG. 12 is a schematic plan view of the set of earplugs of FIG. eleven,

FIG. 13 is a schematic 3D view of a further embodiment of an earmuff kit comprising a container for storing earmuffs,

FIG. 14 is a schematic 3D view of yet another embodiment of an earmuff kit comprising a container for storing earmuffs,

FIG. 15 is a schematic 3D view of a further embodiment of an earplug kit comprising a container for storing earplugs,

FIG. 16 is a schematic plan view of the set of earplugs of FIG. 15,

FIG. 17 is a schematic 3D view of a further embodiment of an earmuff kit comprising a container for storing earmuffs,

FIG. 18 is a schematic top view of the set of earplugs of FIG. 17,

FIG. 19 is a schematic 3D view of yet another embodiment of an earmuff kit comprising a container for storing earmuffs,

FIG. 20 is a schematic three-dimensional view of a further embodiment of an earmuff kit comprising a container for storing earmuffs,

FIG. 21 is a schematic three-dimensional view of a further embodiment of an earmuff kit comprising a container for storing earmuffs,

FIG. 22 is a schematic 3D view of a set of earplugs according to an aspect of the invention similar to that shown in FIG. 3 - 7, with a molded zigzag cord,

FIG. 23 is a schematic three-dimensional view of a set of earplugs according to an aspect of the invention similar to that shown in FIG. 11-21, while in this set, each anti-noise insert is additionally provided with a positioning disk, and each container has a complementary rim,

FIG. 24 is another schematic 3D view of the earplug assembly of FIG. 23,

FIG. 25 is a schematic plan view of an embodiment of a set of earplugs according to a further aspect of the invention, wherein said set provides, among other features, a storage container comprising a resiliently deformable tack for locking the container and side attachment of a cord to the shaft of each earmuff,

FIG. 26 is a schematic cross-sectional view of the set of earplugs of FIG. 25 along the line A-A of FIG. 25,

FIG. 27 is a schematic cross-sectional view of the set of earplugs of FIG. 25 along the B-B line of FIG. 25,

FIG. 28 is a schematic cross-sectional view of the set of earplugs of FIG. 25 along the line C-C of FIG. 25,

FIG. 29 is a schematic three-dimensional top view of the set of earplugs of FIG. 25,

FIG. 30 is a schematic 3D bottom view of the set of earplugs of FIG. 25,

FIG. 31 is a schematic plan view of a set of earplugs similar to FIG. 25-30, while adjacent sections of the cord are separated from each other by a break along the line of weakening,

FIG. 32 is a schematic three-dimensional view of a portion of a set of earplugs similar to that shown in FIG. 25-30, this shows a fragment of two anti-noise inserts in the storage position, placed in the cavity of two cap elements, and

FIG. 33 is a schematic side view of a storage container forming part of a set of earplugs similar to that shown in FIG. 25-30, wherein the container includes two cap members which are shown in the closed state, i.e. folded relative to each other and fixed next to each other by means of a clamping element.

Implementation of the invention

The present invention provides earmolds, earmold sets, and related components that can lead to improvements in many aspects of the use, manufacture, and disposal of earmolds.

FIG. 1 shows an earplug (10) according to one embodiment of the first aspect of the invention. The anti-noise insert contains a housing (12) forming an elongated rod (14). The rod (14) contains a grip at one end of the earplug (10). Soundproofing elements in the form of three essentially hemispherical domed flanges (16, 18, 20) are provided on the opposite nose end (22) of the rod (14). Each domed flange (16, 18, 20) forms an elastically deformable skirt of relatively uniform thickness. The free ends of the flanges (16, 18, 20) are opposite to the nose end (22) and directed towards the grip. The flanges (16, 18, 20) are spaced along the length of the stem (14) and gradually increase in size along the length of the stem (14), with the smallest flange (16) at the top of the nose end (22) and the largest flange ( 20) is the farthest from it and the outermost flange. Earplugs with such domed flanges may be referred to as "dome flange" earplugs.

The rod (14) is at least partially hollow and has an outer diameter of about 5 mm. The cavity is formed by a socket (23) extending from the gripping end of the anti-noise insert into the rod (14), where it forms an inlet. The socket (23) ends with a blind end in the rod (14) and is made with the possibility of introducing a complementary cord or cable through the inlet. The stem is configured to retain the cord inserted into the socket with a friction fit. For this, the socket diameter is approximately 1.5 mm.

The earmuff according to this embodiment is made of a polymeric material in the form of a thermoplastic elastomer. During the manufacture of the earmuff (10) by casting, a pin with a diameter equal to the diameter of the socket, installed in the mold, allows the formation of a socket in the rod. This pin can be made of stainless steel. Before the liner is removed from the mold, the resin material must be sufficiently cured to allow the next part to be removed and cast. Casting can be carried out at a temperature of about 220°C. The pin does not substantially remove heat from the polymeric material to a sufficiently rapid extent, therefore heat must be removed from the area surrounding the socket by means of a rod (14) to ensure that the innermost material surrounding the socket is cooled to a temperature low enough to obtain his rejection. The rate of heat transfer through the rod (14) is directly related to the thickness of the material.

The grip of each earmuff contains four elongated ridges extending longitudinally along the length of the grip, which in combination have a substantially cruciform cross section. Reference number 24 in the drawing denotes one of the four ridges. The ridges are interspersed with a series of baffles (25) which protrude substantially transversely from the ridges and connect them at intervals.

The ridges and baffles define a plurality of recesses or recesses (26) provided along the length and around the grip of the rod (14).

The recesses (26) are located along the length of the grip, while the distance from any point of the rod (14) to the outer surface of the grip is less than the radius of the rod. It should be noted that this distance is determined not only radially outward and perpendicular to the central axis of the rod, but also directly to the nearest point, which may be near the nearest recess or the like. As a result, the minimum distance in the material over which heat must propagate in order to dissipate it is reduced. Notches (26) along the length of the rod (14) reduce the thickness of the material over which heat must be distributed, thus increasing the rate of heat transfer from the rod. In this case, it can be expected that the innermost material along the seat, and hence the entire earmuff, will cure in a shorter time. As a result, a shorter residence time of the earplugs in the mold is required and the rotation speed of the parts can be increased. This makes production more efficient, with potentially higher uptime and reduced cycle times per part.

Obviously, the recesses must be of sufficient size to withstand the mechanical forces that the earbuds may experience during normal use, in particular the forces applied to the earmold when inserted into and removed from the wearer's ear, as well as the forces that may occur when the cord is secured in nest. Applicant contemplates that the injection molding time can be reduced by up to 30% by using recesses of sufficient size.

The recesses may also be of any suitable size, configuration, or shape, including, but not limited to, channels, grooves, and recesses. A plurality of differently profiled recesses may be provided, including differently profiled recesses on a single earplug.

It should be understood that although flanges are shown as sound deadening elements, however, any suitable form of sound deadening elements may be used. In the embodiment in FIG. 1 shows three domed flanges, however any suitable number of them may be used as desired, including one, two or more than three flanges.

During use, as known to those skilled in the art, the user can hold the dome (10) by the shaft (14) and insert the dome-shaped flange nose (16, 18, 20) into one of their external ear canals. At least some of the flanges can easily deform due to their inherent resilience when the flanges abut against the sidewalls of the wearer's external auditory canal, and the resilient nature of the flanges may serve to hold the dome in place in the external auditory canal. The earplug is usually inserted deep enough into the external auditory canal so that the largest flange (20) closest to the grip and being the outermost flange at least partially blocks the external auditory canal. In such a position during use, the earmold may serve to at least partially prevent sound waves from entering the wearer's inner ear, thus protecting the hearing organ from damage due to exposure to high sound levels. The user may insert one earmold into each of their ear canals. Removal of the earmold from the ear canal can be accomplished by holding and pulling the shaft (14) which protrudes from the user's ear opening during use.

The earbuds of this embodiment may be supplied or sold in a set of two, whereby a patch cord may be provided as part of the kit, the ends of which are retained by the earpiece sockets with a friction fit as described above.

A set of earplugs of the type described above with reference to FIG. 1 can also be supplied with a cord. The cord can be inserted into the sockets provided in the gripping ends of the earplugs. Obviously, many different types of cords may be suitable for use. The shape and configuration of the socket can be chosen to suit the specific type of cord. The diameter of the cord may vary within a possible range of about 1 mm to about 1.8 mm, inclusive, in accordance with the size of the socket. Similarly, a cross-sectional profile other than circular may be used.

It should be noted that, if the supply of earplugs connected with a cord is not a requirement, the embodiment shown in FIG. 1 can be implemented without the socket (24) in the grip. In this case, the recesses may still provide a reduction in cooling time to speed up the production cycle, and may also lead to a reduction in material consumption during manufacture.

FIG. 2 shows an earplug (30) according to the first embodiment of the following aspect of the invention. The liner is substantially similar to that shown in FIG. 1, with like reference numerals being used to refer to like components and features.

Sound-diffusing elements are provided on a convex surface forming the front side (32) of the largest flange (20), which is located closest to the grip (14) and is the outermost flange. In this embodiment, the sound-diffusing elements are tetrahedral protrusions (34) extending from the front side (32). The sound-diffusing elements serve to scatter and reflect sound waves from the front side (32) of the flange, causing the sound waves to be reflected from the front side (32). This can reduce sound transmission through the flange, thereby attenuating sound entering the wearer's inner ear and increasing the damping effect of the earbud. This may also serve to deflect sound waves away from the shaft (14), while the smooth face may simply reflect the sound waves towards the shaft (14), from where they can be further transmitted to the nose end (22) and then enter the wearer's inner ear. .

FIG. 3 shows an embodiment of an earplug (40) according to this aspect of the invention. This insert is also similar to the insert of FIG. 1, here also like reference numbers are used to refer to like components and features. In this embodiment, the sound-diffusing elements are provided in the form of ribs (44) on a concave surface forming the inner face (42) of the largest flange (20). The fins also serve to reflect sound waves away from the face of the dome, resulting in reduced sound transmission through the earbuds and increased damping factor.

The drawing shows that the ribs extend radially from the rod, however, it should be noted that they can also be distributed concentrically on the surface, increasing in diameter as the diameter of the flange increases. This can contribute to noise dispersion as sound waves can deviate from the flange.

In some cases, increasing the damping factor may be undesirable because excessive damping may result in the user not hearing certain sounds that they should. Then, using the above aspect, less material, and possibly even fewer flanges, may be required to provide adequate damping. This can lead to the consumption of less material during manufacture and, accordingly, to a lower cost of the earmuff.

It should be understood that the sound-diffusing elements may not only be provided on the outermost flange, but may also be located on any one or more flanges. If only one flange is provided, the sound-diffusing elements can only be located on it. It should be noted that the sound-diffusing elements may be of any suitable shape or configuration. A variety of shapes and designs of the sound-diffusing elements may be used, such as ribs, squares, irregular shapes, surface texturing, or the like. Several such shapes may be provided on the same flange face.

FIG. 4 shows a set (50) of earplugs according to one embodiment of the following aspect of the invention. The kit contains two earplugs (52) and a cord or cable (54) connecting the two earbuds (52).

The earplugs (52) are of a type that comprises a body forming an elongated shaft with a catch at one end and a nose protrusion at the opposite end, with a set of three domed flanges located near the nose end, with the free ends of the flanges pointing to the side, opposite the nasal end. The flanges are located at intervals along the length of the rod, and their size gradually increases, while the smallest of the flanges is located at the edge of the nose end, and the largest of the flanges is located farthest from it and is the outermost flange.

The cord (54) contains two coiled helically wound parts (56) and is partially attached to the outer surface of the insert rods (52). Because the cord is molded as one piece with the rods, it connects the rods to each other. Forming the cord in such a folded form partially around the outer surface of the shank can provide a stronger connection between the cord and the shank than a direct connection at the grip end of the shank.

This set of earplugs is molded as a block. At the same time, the cord is cast as a single unit with two anti-noise inserts, which allows using one injection mold to make the entire set. All parts of the kit are made from the same material, which simplifies the recycling (disposal) of the kit. Production time is reduced as no separate insertion of the cord into the earbuds is required. The manufacturing process is simplified as there is no need to store different types of parts. Since it is not necessary to insert the cord into the socket provided in the shank of the liner, the above-described disadvantage of using a pin in casting is eliminated, and faster cooling and solidification of the part is possible. This further reduces the production time.

The coiled, helically wound portions (56) of the cord may have a certain amount of resilience, whereby the coils may be stretched to allow the user to place the earbuds, however, when the tension is released, the cord returns to its original shape as two coiled portions (56). This may occur when the user takes the earbuds out of their ears. This may reduce the tendency for cords to become tangled when stored in a user's pocket or other similar storage means.

It should be noted that this aspect of the present invention extends to other types of inserts, and not only to the specific type shown in FIG. 4. For other types of liners, such as foam liners or the like, this aspect of the invention can be used to simplify manufacture, recycling (disposal) and use.

In FIG. 5 shows a set (60) of earplugs similar to that shown in FIG. 4, with like reference numerals also being used to refer to like features and components. In this embodiment, however, the flat member (62) is attached to the coiled portions (56), with the coils of the coiled portions attached to adjacent sides (64, 66) of the flat member (62). The flat element can simplify the casting process and make it more convenient to store the set of earplugs before first use. In addition, the flat element eliminates the need for a cord tie that prevents the cord from becoming tangled on its own or with other cords from other earplug sets.

The coils may be torn off and freed from the flat member prior to first use, and the flat member may then be disposed of in an appropriate manner.

FIG. 6 and 7 show a set (70) of earplugs according to a further embodiment of this aspect of the invention. The kit contains two earplugs (10) of the type described above with reference to FIG. 1, with like reference numerals being used to refer to like features and components. In this embodiment, however, the stem (14) does not contain a socket because the cord or cable (71) connecting the two earplugs is integrally molded with the earbuds on the stem and connected to their ends. The cord (71) is formed as part of the flat element that forms the body of the cord. In this case, the body of the cord is made in the form of a disk -shaped ring (72). This eliminates the danger of the cord becoming tangled prior to its initial deployment and the need for a connector to attach the cord itself, as well as the need to be housed in a case. Such blocks can be stacked in bulk, further reducing the need for packaging. This, in turn, reduces manual labor and the need for the material.

Notches (26) are provided on the rod (14), however, it should be noted that the rod does not contain a socket, which is created by the pin during the casting of the rod. Preferred drying, setting or curing times (as appropriate) can provide recesses regardless of the absence of a pin during casting, since the thickness of the material through which heat must be removed is still reduced by the presence of such recesses.

In this embodiment, the recesses can also reduce the consumption of material, which is associated with a reduction in manufacturing costs.

The disc-shaped ring (72) contains a plurality of grooves (74) having a circular or labyrinth arrangement. The sides of the cord remain connected, forming a circular, disc-shaped cord body. Said grooves can be cut into the ring (72) after casting, possibly while the kit is still in the mold. Alternatively, lines of weakness may be pressed or cut into the ring during the casting process. Said grooves or lines of weakness allow the body of the cord to be torn along them to obtain an unfolded cord. Before using the earbuds for the first time, the user may tear the disc along the grooves or lines of weakness, thus separating adjacent parts of the cord and converting it into an elongated form suitable for use.

The grooves or lines of weakness may be in any suitable configuration and may give the appearance of a helically wound cord. It should be noted that in the case of using a flat element, the cord torn off from it may have a rectangular cross section. However, it is contemplated that the flat element may be corrugated, with lines of weakness being formed between adjacent corrugations. Through the use of such a corrugated flat element, it is possible to obtain a cord with an increased cross-sectional roundness.

FIG. 6 and 7 show earplugs similar to those shown in FIG. 1, however, it should be understood that any suitable type of earplug may be molded integrally with the cord as described above.

FIG. 8 shows a cord (80) for a set of earplugs according to one embodiment of the following aspect of the invention. Cord (80) is molded as a helically wound flat disc-shaped ring as described above with reference to FIG. 6 and 7. A line (82) of weakening extends between adjacent connected cord portions. Breaking the ring from its disc shape along the line (82) of weakening results in a cord in an elongated separated state.

The cord contains sound-reflecting elements (84), which in this case have a triangular shape and protrude outward from its outer surface. These elements (84) are spaced about 2 mm apart along the length of the cord and are sloped with the lower side of the ramp facing the middle of the cord in the split state and the higher side of the ramp facing the side of the liner in the split state. cord. The triangles are arranged so that the apex of one triangle faces the base of the adjacent triangle, with the apex of the triangle facing the end of the cord that attaches or attaches to the liner.

In this embodiment, the ends of the cord located on the inside of the ring are configured to be connected to the earplugs, while the ends located on the outside of the ring remain connected to each other in the separated state of the cord. As a result, the narrower end of the triangular sound-reflecting elements is located on the side of the cord facing the liner, and the wider end is located at the base, from where it slopes upward towards the narrower end. At the midpoint of the cord in its separated state, the direction of the sound reflective elements is reversed along the length of the cord.

The ramp may rise to only about 0.2 mm above the outer surface of the cord, however, this can have a significant effect on sound transmission within the cord. Sound waves passing through the cord may enter the ramp where they may contact the raised ramp and be reflected back. As a result, sound waves passing through the cord can be damped by such sound-reflecting elements.

Obviously, many different types of sound-reflecting elements can be provided on the cord. In particular, in addition to the triangular shapes described, conical, trapezoidal, conical with non-straight edges, triangular with curved edges or corresponding truncated-conical shapes can be used. All of these elements can be arranged in such a way that the top of one element faces the base of the neighboring element, respectively. It should be noted that the low protrusion height of said elements provided in this embodiment can prevent them from catching on, for example, the wearer's clothing and pulling the earmold out of the wearer's ear. In addition, the cord according to this aspect of the invention can be used with any type of earplugs, not just earplugs having a domed flange and described with reference to the drawings.

It should be noted that the sound-reflecting elements may protrude into the cord, and not out of it. Such a protrusion may have a height of from about 0.1 mm to about 0.4 mm, inclusive, in either direction. In addition, the distance between such elements along the length of the cord may be from about 0.5 mm to about 4 mm (inclusive).

FIG. 9 and 10 show a set of earplugs that contains features of the two aspects of the invention described above. Thus, the drawings show a cord with a pair of earplugs (91) attached to it and molded integrally with it to form a set (90) of earbuds. Similar features and components of the cord of FIG. 8 are denoted by like reference numerals in FIG. 9 and 10. The earplugs are also of the type which comprises a housing (92) forming an elongated shaft (94) with a hook at one end and a nose protrusion (96) at the opposite end, with a set of three soundproofing elements in the form of domed flanges. (98, 100, 102) located near the nose end, with the free ends of the flanges facing the gripping end. The flanges (98, 100, 102) are spaced along the length of the shaft (94) and gradually increase in size, with the smallest (98) of the flanges located at the edge of the nose end and the largest (102) of the flanges furthest from it. and outermost flange. The rods (94) are provided with a plurality of trapezoidal recesses (104) which serve to reduce material consumption as described above.

A cord (80) is attached to the ends of the rods.

To convert the disc-shaped ring into an elongated cord, it can be broken along the line (82) of weakening notched in it. The sound-reflecting ridges (84) on the cord may serve to dampen sound waves and other vibrations passing through the cord during use, as described above with reference to FIG. 8. The ends of the cord farthest from the earplugs (91) may remain connected to form a single, extended cord. The connection at these ends can be reinforced to prevent accidental disconnection.

It should be noted that the lower part (106) of the set of anti -shift inserts is shown in FIG. 10. As you can see, the lines of weakening do not pass throughout the thickness through the disco -shaped ring. Instead, the ring is only partially cut to prevent the undesirable premature rupture of the cord and its transformation into an elongated form to the intentional separation of the cord.

FIG. 11 and 12 show a set (110) of earplugs according to one embodiment of the following aspect of the invention. The kit contains a pair of earplugs molded as a single unit, a cord or cable in the form of a disc-shaped ring and a container (112) for earplugs. The earplugs (10) and disc-shaped ring (72) are identical to those described above with reference to FIG. 6, with like reference numerals being used to refer to like components and features as appropriate. The container (112) is a new additional component attached to the ring (72) in a position that forms the midpoint of the cord in its separated state. This provides a symmetrical set of earplugs.

The container (112) is made in the form of a tube. This tube has opposite open ends (114, 116) and is designed to secure at least the largest flanges (20) of the earplugs with a friction fit.

Before using the earmuff kit for the first time, the user may release the cords or notches from the ring to create an extended cord. The container will remain attached to the cord. If the user wishes to store the earplugs between uses, they can insert the nose ends of the earplugs into the opposite open ends (114, 116) of the tube. The largest flange (20) of each earmuff will connect to the inside wall of the tube (112) with a friction fit, thus securing the earmuffs (10) in the storage position. This protects the nose ends of the flanges from the deposition of dust or other foreign matter and may prevent such dust or other foreign matter from entering the wearer's ear. Thus, the open ends of the tube form two cavities for insertion of the nose ends of the earplugs.

In the earplug storage position, the rods (14) can protrude from the open ends of the tube, allowing the user to pull them out to remove the earbuds from the tube for reuse. While the earplugs are stored, the cord hangs freely from the container, and the cord is less likely to become tangled because it does not have loose ends, which may reduce the possibility of a knot or the like. during storage.

It should be understood that the container need not be located at the center of the cord, but may be located at any point along its length.

It should be noted that the container may extend from the grip of the liner or from a cord extending from the grip. In this case, the container can be molded as a single unit with the cord.

FIG. 13 shows a further embodiment of a set of earplugs (120) in accordance with this aspect of the invention. In this case, the earmuff kit also contains a pair of earmuffs, a disc-shaped cord, and a container (122). The earplugs (10) and disc-shaped ring (72) are identical to those described above with reference to FIG. 6, with like reference numerals indicating like components and features as appropriate. The whole set is cast as a single unit in one injection mold.

The container (122) according to this embodiment has a base (124) and a lid (126) connected to each other. The base (124) and lid (126), respectively, contain two halves of interacting cavity pairs (128, 130, and 132, 134), which may also be referred to as socket pairs. The opposite side walls of the base and the cover form halves (136) of round holes through which the rods (14) of the earplugs can protrude.

During use, the cord can be deployed to obtain its elongated shape, as described above. If the user wants to store anti -noise liners, he can place their nasal ends containing flanges (16, 18, 20) of anti -noise liners (10) in the first cavity pair (128, 132) at the base (124) and close the lid. Capital vapors (128, 130, and 132, 134) form full cavities that fix the nasal ends of anti -noise liners. Half (136) round holes in the corresponding lateral walls of the base and lid form round holes through which the rods of anti -noise liners protrude. Thus, the indicated cavity can protect the nasal ends of the anti -noise liners during storage. The cover according to this embodiment is equipped with a locking element in the form of a locking tongue (138), which can be inserted into a complementary groove (not shown) to hold the lid in a closed position. The cover is closed during storage of anti -noise liners, but can also be closed when the container is not used. Being closed when the container is not used, the lid can at least partially prevent accumulation inside the dust cavity or other pollution, which otherwise could fall into the flanges of anti -noise liners during the next period of their storage. Removing the tongue from the groove allows you to open the lid if it was closed during storage of anti -noise liners, and extract anti -noise liners from the cavity for further use.

It should be noted that the inner walls of the cavities slope inwards, forming a wedge shape in the closed position. This wedge can approach the outside profile of the flanges, fitting snugly against the flanges and holding the earplugs between the base and cover with a tight fit. In addition, the base and cover can be used interchangeably, while the locking tab (138) can also be provided on the base, and the liners can be placed in the cover and closed by the base.

The presence of a fastener and cover can provide an improvement in hygienic qualities for the user, a longer exploitation of the anti -noise liner, due to its prolonged fit for use, and obtaining environmentally more secure and suitable for secondary processing of the product as a result of the choice of the same material as the material of anti -noise loses.

FIG. 14 shows a further embodiment of a set of earplugs (140) in accordance with this aspect of the invention. The kit is similar to that shown and described above with reference to FIG. 13, while it contains a pair of earplugs, a cord in the form of a disc-shaped ring and a container (142). The earplugs (10) and disc-shaped ring (72) are identical to those described above with reference to FIG. 6, with like reference numerals designating like components and features. The whole set is cast as a single unit in one injection mold.

The container (142) according to this embodiment comprises a base (144) and a lid (146) which are pivotally connected to each other. The base (144) and the cover (146) each form an interacting pair (148, 150) of cavities. The side walls, opposite the hinge connection between the cover and the base, form a half (152) round hole through which the rods (14) of the anti-noise inserts can protrude outward.

During use, the cord can be deployed to get its elongated shape, as described above. If the user wants to store anti -noise liners, he can place their nasal ends containing flanges (16, 18, 20) of anti -shock liners in the first half (148) of the cavity at the base (124) and close the lid, turning the container in the articulated joint. At the same time, half (148, 150) of the cavities form a full cavity in which the nasal end of the anti -noise liners is held. The pairs of halves (152) of the round holes in the corresponding side walls of the base and lid form round holes through which the rods (14) of anti -noise liners protrude. Thus, the base (144) and the cover (146) of the container (142) can protect the nasal ends of the anti -noise liners during storage.

It should be noted that the interior of the cavity (148, 150) is delimited by opposite curved side walls that approach the outer profile of the flanges. The curved sidewalls can compress the flanges during earplug storage and secure them with a tight fit in the retaining members.

FIG. 15 and 16 show a further embodiment of a set (160) of earplugs according to this aspect of the invention. Like the kits shown in FIG. 11-14, the kit (160) contains a pair of earplugs, a disc-shaped cord, and a container (162). The earplugs (10) and disc-shaped ring (72) are essentially identical to those described above with reference to FIG. 6, with like reference numerals designating like components and features. The only notable difference is that the disc-shaped ring (72) is slightly wider. However, its operation is the same as described above. The whole set is also cast as a single unit in one injection mold.

The container (162) according to this embodiment comprises a flat base (164) with two downwardly tapering cap elements (166) emerging from it and forming cavities or nests. Cap elements have the form of buckets with an open top end on a flat base (164) and a closed bottom end.

During use, the cord can be deployed to get its elongated shape, as described above. FIG. 16 visible lines (168) of weakening, which allow it to expand it from the disco -shaped ring.

If the user wishes to store the earplugs (10), he can place their nose ends containing the flanges (16, 18, 20) of the earplugs (10) into the cavities formed by the cap elements (166). The cap elements (166) hold the nose ends of the earplugs (10) in a friction fit as the flanges (16, 18, 20) abut against the tapered inner sidewalls of the cap elements. The rods (14) of the anti-noise inserts protrude through the open upper parts of the cavity of each cap element (166) beyond the flat base (164). Thus, the cap members (166) can protect the nose ends of the earplugs during storage. If earplugs are to be used, they can be removed from the cap elements (166).

FIG. 17 and 18 shows the following option for the implementation of the set (170) of anti -noise liners according to this aspect of the invention. Like the kits shown in FIG. 11-16, the set (170) contains a pair of anti-shift inserts, a cord in the form of a disco-shaped ring and a container (172). The anti -shock liners (10) and the disc ring (72) are identical described above with the links to FIG. 6, at the same time similar to reference numbers as necessary, similar components and characteristics are indicated. The whole set is also cast as a single unit in one injection mold.

The container (172) according to this embodiment comprises a flat base (174) with two downwardly tapering cap elements (176) emerging from it and forming cavities or nests. Cap elements have the form of buckets with an open top end on a flat base (174) and a closed bottom end. The flat base (174) is provided with receiving holes (188) for the locking elements.

The lid (178) is made as part of the container (172) and is hinged to the flat base (174). The cover (178) contains two connecting elements (180) forming tongues with radially stepped locking elements (182) on them. The locking elements are located on the tongues so that each tongue contains a free end (184). The cover has holes (186).

During use, the cord can be unrolled to obtain its elongated shape, as described above. If the user wishes to store the earplugs (10), he can place their nose ends containing the flanges (16, 18, 20) of the earplugs (10) into the cavities of the cap elements (176). The cap elements (176) hold the nose ends of the earplugs (10) in a friction fit as the flanges (16, 18, 20) abut against the tapered inner sidewalls of the cap elements. The rods (14) of the earplugs protrude through the open tops of the cavities beyond the flat base (174).

The lid (178) can then be rotated in its hinged connection with the flat base (174) to cover the open upper ends of the cavities (176). It should be noted that the cover is moved in such a way that the rods (14) of the earplugs protrude through the holes (186) provided in the cover.

The free ends (184) of the tongues can be inserted into the receiving holes (188) of the locking elements in the flat base (174). The user can then pull on the free ends (184) to guide the radially stepped locking elements (182) through the holes (188). It should be noted that the radial steps have a larger diameter than the diameter of the holes, however, the elastically deformable nature of the polymeric material from which the set of earplugs is made allows the holes to expand and deform, and the stop elements to contract and deform, so that the stop elements pass through the holes. After the passage of the locking elements through the holes, these holes essentially return to their original size, and the size of the locking elements also increases to its original size. Each radially stepped locking element (182) contains a shoulder that is located behind the corresponding hole (188), while holding the cover in the closed position.

Thus, the cap members can protect the nose ends of the earplugs during storage. If earplugs are to be used, they can be removed from the cap elements (176). It is obvious that the locking elements can be withdrawn from the holes in the opposite direction to that indicated above in order to release the lid and allow it to open.

In FIG. 19 shows a further embodiment of a set of earplugs (190) in accordance with this aspect of the invention. Like the kits shown in FIG. 11-14, the kit (190) contains a pair of earplugs, a disc-shaped cord, and a container (192). The earplugs (10) and disc-shaped ring (72) are essentially identical to those described with reference to FIG. 6, with like reference numerals designating like components and features. The entire set is also cast as a single unit in one injection mold.

The container (192) according to this embodiment comprises a flat base (194) with two downwardly tapering cap elements (196) emerging from it and forming cavities or nests. Cap elements have the form of buckets with an open top end on a flat base (194) and a closed bottom end. A lid (198) is provided that is hinged to a flat base (194). The lid has two slots (200) extending partially along the width of the lid from the side wall opposite the hinge. A landing element (202) is also provided, which protrudes into the open top of one of the cap elements and has a semi-cylindrical free end near the central region of said open top.

During use, the cord can be unrolled to obtain its elongated shape, as described above. If the user wishes to store the earplugs (10), he can place their nose ends containing the flanges (16, 18, 20) of the earplugs (10) into the cavity (196). These cavities (196) hold the nose ends of the earplugs (10) in a friction fit as the flanges (16, 18, 20) abut against the tapered inner sidewalls of the cap members. The rods (14) of the earplugs protrude through the open tops of the cavities beyond the flat base (194). The lid (198) can be rotated to partially cover the open upper ends of the cavities (196) with the earplug bars (14) protruding through the slots (200). The rod (14) of the anti-noise insert (10) in the cap element provided with the landing element can be located in this landing element. This may help hold the liner in place.

Thus, the cap members (166) can protect the nose ends of the earplugs during storage. If earplugs are to be used, they can be removed from the cap elements (166). It is obvious that the liner placed in the seat (202), under certain circumstances, can act as a blocking element to fix the cover (198) on the base (194), for example, if the fit of the slots (200) around the rods (14) is frictional fit sufficient to grip the rods (14).

Alternatively or additionally, another appropriate locking element may be provided which may hold the cover (198) in place as needed.

FIG. 20 shows a further embodiment of a set (210) of earplugs according to this aspect of the invention. This set of earplugs is similar to the set described above with reference to FIG. 5. The set of earmuffs contains the same two earmolds (52) and a cord connecting them (54). The essential difference lies in the connection of the cord (54) with the rods (14) of the earplugs. In this embodiment, the cord is not partially coiled around the stem, but fits against the side wall of the stem (14). The flat member (62) is attached to two coiled portions (56), with the coils of the coiled portions (56) attached to adjacent sides (64, 66) of the flat member (62). However, in this embodiment, the flat element also contains two cap elements (212) protruding from it, tapering downwards. The cap elements have the form of buckets with an open upper end on a flat element (62) and a closed lower end.

During use, the cord can be unrolled to obtain its elongated shape, as described above. If the user wishes to store the earplugs (52), he can place their nose ends containing the flanges of the earplugs (52) into the cavities formed by the cap elements (212). The cap members (212) hold the nose ends of the earplugs (52) in a friction fit as the flanges abut against the tapered inner sidewalls of the cap members. The ear plug rods protrude through the open tops of the cavities beyond the flat member (62). Thus, the cap members can protect the nose ends of the earplugs during storage. If earplugs are to be used, they can be removed from the cavities (212).

FIG. 21 shows a further embodiment of a set (220) of earplugs according to this aspect of the invention. The kit (220) contains a pair of earplugs (222, 224) and a container (226). Each liner (222, 224) is connected to the container (226) by a separate cord (228, 230). The earplugs (222, 224) are provided with dome-type flanges as described above, however, in this embodiment, their stems (232, 234) are not recessed. The entire set (220) is also cast as a unit in one injection mould.

The cords (228, 230) have a rectangular cross section and are shaped to be stacked on top of each other, with adjacent portions of each cord adjacent to each other between the folds. Cords (228, 230) are connected by adjacent parts as a result of molding. Lines of weakness or grooves may be cut between adjacent parts to facilitate their separation. Each cord (228, 230) is connected at its first end to a disk (236, 238) provided at the end of the stem of the respective earplug (222, 224).

The container (226) according to this embodiment comprises a flat base (240) with two downwardly tapering cap elements (242) extending from it and forming cavities or nests. The cap elements (242) end with closed blind ends opposite the base (240). The second ends of the cords (228, 230) are connected to the base (240) at connection points (244, 246). It should be noted that the cords (228, 230) in the folded position shown also lie against the side of the flat base (240). Lines of weakening or grooves may be cut between the base and adjacent parts of the cord.

During use, each cord can be individually separated from its folded position to free the connections between all adjoining parts, and between the flat base and adjoining cord parts. After that, the container (226) will serve as a connection between the two parts of the cord (228, 230), connecting the earplugs (222, 224) together with the cords (228, 230).

If the user wishes to store the earplugs (222, 224), he can place their nose ends containing flanges in the cavities formed by the cap elements (242). As described above with reference to FIG. 15 and 16, the cavities (242) hold the earplugs (222, 224) in a friction fit as at least the largest flanges abut against the tapered inner sides of the cap members. The rods (232, 234) of the earplugs can protrude through the open tops of the cavities beyond the flat base (240). Thus, the cap members can protect the nose ends of the earplugs during storage. If earplugs are required, they can be removed from the cavities (242).

FIG. 22 shows an embodiment of a set (250) of earmuffs according to one aspect of the invention, similar to the sets described above and shown in FIG. 4-7. The kit contains two earplugs (252, 254) and a cord connecting them (256), while the whole kit is molded at the same time as a single unit.

The earplugs (252, 254) are also provided with dome type flanges as described above. In this embodiment, the cord (256) connecting the two earplugs has a zigzag shape. It should be noted that the neighboring parts of the cord are not connected to each other. Shaping the cord in such a zigzag shape can provide resilience to the cord, whereby the zigzag portions can be stretched to allow the wearer to place the earbuds, however, the cord at least partially returns to the zigzag shape shown when the tension is released. This can happen when the user takes out liners from the ears. Thus, the tendency of cords to become tangled when placed in a wearer's pocket, or when other similar storage means is used, can be reduced. The tendency of the cord to return to its zigzag shape may also cause the cord to return to that shape during use by the user, causing the cord to hang from the user's ears in a partially zigzag pattern.

The cord can be cast in any required form while maintaining the advantages of casting in the form of a single whole with inserts, as described above.

FIG. 23 and 24 shows the option of implementing a set (260) of anti -noise liners according to one aspect of the invention similar to the sets described above and shown in FIG. 11-21. The kit (260) contains two anti -shift liners (262, 264) and cord (266), connecting these two anti -shift liners (262, 264) through the container (268) for storage. All elements of the set (260) are cast simultaneously as a whole.

Earplugs are generally provided with flanges of the domed type described above. Each bushing contains a housing (270) forming an elongated shaft (272). The stem (272) contains a grip at one end of the bushing (262, 264). Soundproofing elements in the form of three essentially hemispherical domed flanges are provided at the opposite nose end of the rod (272) as described above with reference to the previous embodiments. Each dome -shaped flange forms an elastic deformable skirt relative to uniform thickness. The free ends of the flanges are facing the opposite of the nasal end and are aimed at capture. The flanges are located at the intervals along the length of the rod (272), and their size gradually increases along the length of the rod (272), while the smallest flange is located near the edge of the nasal end, and the largest flange is the most remote from it, the extreme external flange.

In this embodiment, a positioning element is provided in the form of a positioning disc (274) located on each bushing between its shaft end and the largest flange.

Notches (275) are provided on the outer surface of the rod (272) located along the length of the rod so that the distance from any point in the rod to the outer surface of the grip is less than the radius of the rod.

The notches (275) are defined and defined by four elongated ridges (276) that extend longitudinally along the length of the grip and five spaced webs (277) that project substantially transversely from the ridges and connect the ridges at intervals. In combination with each other, the ridges have a substantially cruciform cross section.

The cord (266) contains two parts, the first of which passes between one liner (262) and the container (268), and the second between the other liner (264) and the container. These two parts of the cord are connected to the container at connection points (278). In the molded state shown, before the first use of the set of earplugs, two pieces of cord (266) are helically wound to form a disc-shaped ring around the earbuds (262, 264). A thin breakaway connection is provided between the two parts of the cord. Adjacent portions of said two parts are shaped so that the cord portions are connected to each other at the connecting portions (280) at regular intervals.

The container (268) according to this embodiment comprises a flat base (282) with two downwardly tapering cap elements (284) extending from it and forming cavities or nests. The cap elements are in the form of buckets, with an open upper end on a flat base (282) and a closed lower end. The rim (286) extends radially inwardly from the open upper end of each cavity (284). These rims (286) are complementary to the positioning discs (274).

To use a set of earmuffs, the user can break the connecting sections (280) to separate adjacent parts of the cord (266). The user can then break the thin connection between adjacent parts of the cord to obtain one connection between each liner and connection point (278) on the container. The earplugs can then be used in a known manner.

If the user wishes to store the liners (262, 264), he can place their nose ends, containing the flanges of the anti-noise liners (262, 264), in the cavities (284) of the cap elements. The cavities (284) can hold the nose ends of the earplugs (262, 264) with a friction fit because the flanges can abut against the tapered sidewalls of the cap members. In this embodiment, a positioning disk (274) can be placed in the cavity (284), which is located behind the rim (286) having a complementary shape and forming a shoulder. Said rim functions as a receiving part for the positioning element.

For the manufacture of a set of anti-noise liners, an elastic deformable material is used, however, it is nevertheless hard enough to keep the disk to hold the bow end of anti-noise liners in the cavity and prevent its accidental movement from there. This can ensure the preservation of the purity and hygiene of the liner during its storage. The ends of the rods (272) of the anti -noise liners protrude through the open upper parts of the cavity, passing behind the flat base (282). Then, if you need to use inserts, they can be extracted from the cavity (284) by stretching for the rods (272).

It should be noted that the positioning disk according to this embodiment can also function as an additional flange and can also block or attenuate sound waves from entering the user's ears.

In addition, in the embodiment shown in FIG. 23 and 24, a mechanical device is provided that allows the cavities to be at least partially closed when not being used to store earplugs. This can prevent dust and other contaminants from entering the cavities where they can settle on the earbuds and make them unhygienic before next use and re-insertion into the wearer's ear.

Such a mechanical device can be, for example, a lid structure.

As an example, storage containers and cavities are shown in FIG. 13 and 14, where the storage container comprises two parts, each of which forms a separate part of one cavity, and the two parts of the container can be closed in the absence of liners in order to at least partially prevent the accumulation of dust or other contaminants in the internal cavities. In the embodiment shown in FIG. 17 and 18, as an example, a retaining element in the form of connecting elements is shown.

Alternatively, the mechanical closure device may use a hinge or fold line provided between the two cap elements and allow them to rotate relative to each other so that the two openings of the cap elements are adjacent and/or adjacent to each other, while the cap elements are closed by each other. friend.

In order to hold the cap elements and cavities side by side, any suitable retaining element may be provided, such as a hook, loop, and/or tab. A similar closure structure may be provided for any of the other embodiments described above and may also allow at least partial closure of the cap elements when not in use.

FIG. 25-30 show a further embodiment of a set (300) of earplugs. This embodiment contains components similar to those of the embodiments described above, all of which are similarly molded as one piece with each other. In this case, the set (300) contains two anti-noise inserts (302, 304) equipped with dome-shaped flanges, and a cord or cable (306) connecting these two anti-noise inserts. The cord has a substantially flat cord body (72).

The kit also contains a container (308) for storage. However, the design of the storage container (308) is less complex than in the embodiments shown in FIG. 17-19. Instead of the tongue and groove structure used in those embodiments, the locking means in this embodiment comprises a gripping element (310) in the form of an elongated loop of resiliently deformable material. The clamping element (310) contains a substantially flat strip (312).

The storage container contains a pair of cap elements (314, 316), each of which forms a cavity for receiving one of the pair of earplugs. The clamping element (310) is connected to the first of the two cap elements (314) at two junctions located at a distance from each other, as shown in FIG. 25 (318, 320). The tack element is molded in one piece with the first cap element (314).

When the container is not used to store the earplugs, the two cap members (314, 316) can be rotated relative to each other around an elastically deformable hinge or fold line (322) provided therebetween. The cap elements can be closed with each other in such a way that the cavities they contain face each other. Then, as most clearly shown in FIG. 33, the grip member (310) connected to the first cap member (314) can be stretched over and around the second cap member (316) to secure the two cap members next to each other. Closing the storage container in this way can at least partially prevent dust or other contaminants from accumulating in the cavities that might otherwise be deposited on the flanges of the earplugs during their next storage period.

As shown further in FIG. 33, when the cap members (314, 316) are secured by the clamp member in the locked position, two jaws (324, 326) surrounding the orifices of the cap members abut each other. Each cap element, respectively, serves as a cap, closing the other cap element. Thus, the need for a separate cover for the container is eliminated, as well as tongues, grooves, locking elements and receiving holes for locking elements, in particular, indicated by reference numbers 184 and 188 in FIG. 17-19.

This reduces the complexity of the design and manufacturing technology according to this embodiment compared to the previous embodiments. A simpler injection mold can be used, resulting in a corresponding cost reduction.

In the locked position of the storage container (308), the second cap element (316) serves as a complementary element that engages with the clamping element. However, it should be understood that other engaging elements may be provided for engagement with the holding member. Thus, for example, instead of the second cap element (316), which serves as a contact element, a sponge, flange, shoulder, pin, or the like can be used, which can be molded integrally with the second cap element to serve for this goal. Other devices for locking cap elements in the closed position are also possible and are within the scope of the present invention.

As shown in FIG. 25-30, two resiliently deformable, substantially U-shaped bending elements (328) can be provided, protruding outward from the flat band (312) of the clamping element. During use, these bending elements can provide a temporary increase in the surface area defined by the clamping element, so that the clamping element changes from a compact configuration at rest to a stretched configuration. In doing so, the bending elements can help to obtain a greater extension of the length of the tack element while maintaining a more compact configuration at rest. The bending elements can further help to resiliency and further elongate the gripping element during stretching, allowing the gripping element to pass over and around the second cap element for locking purposes. The U-shape of each bending element may also allow the tension of the clamping element to be reduced when it is in engagement.

As in the previous described embodiments, each of the earplugs (302, 304) of the earbud set (300) has a body forming a shaft (332, 334). Moreover, each rod contains a grip and soundproofing elements in the form of three domed flanges, essentially hemispherical in shape. A cord (306) molded integrally with them extends laterally from the side of each rod (332, 334) in a direction transverse to the central longitudinal axis of the rod, instead of axially from the gripping end of the rod of each insert, as in the embodiments described above.

During use of the earplugs (302, 304), the side attachment of the cord to the shaft allows at least a portion of the cord to be in contact with the earlobe and/or cheek of the wearer. These parts of the user's body can serve as vibration damping surfaces and are capable of limiting the transmission of sound waves, vibrations and noise through the cord to the user's hearing organs. In preferred embodiments of earmuff sets, the location where the cord connects to the side of each bar is located near the largest domed flange, further helping to keep the cord in contact with the wearer's earlobe and/or cheek during use. However, in the embodiment shown, the cord is connected to the side of each rod (332, 334) at a distance of about 19 mm from the nose end of the respective rod. It should be understood that other suitable connection distances are also possible. However, usually, although not strictly necessary, the connection to the rod is located at a distance from the nose end, which does not exceed about 25 mm.

The grip of each of the two earplugs comprises four elongated ridges extending longitudinally along the length of the grip, which in combination have a substantially cruciform cross section. The two ridges are designated 336 and 338 in the drawing. The ridges are punctuated by a series of baffles (340) which protrude substantially transversely from the ridges and connect them at intervals, thereby limiting recesses or depressions in the grip. In the embodiment shown, a side mounted cord is connected at each grip to a third baffle (340) counting from the grip end. However, the scope of the invention is not limited to such a configuration.

The side mounted cord (306) configuration can reduce the consumption of expensive resins for earmold assemblies while still limiting the volume of noise that can be transmitted through the cord during use to a preferably low level. However, the cord-side configuration may allow the use of polymers with less favorable acoustic conduction characteristics for fabrication, since some noise damping may be provided by cord contact with user body surfaces, as discussed above.

The side cord (306) configuration may also allow the use of larger diameter pins during molding of earmuffs than is commonly practiced in the manufacture of other types of earmuffs. In this case, a larger diameter of the socket in the insert shaft can be obtained. In contrast, in other types of insert, the allowable diameter of the pin and socket is limited to a certain maximum size due to the need to install a complementary cord in the socket. The larger pin size, which allows for a side-mount configuration, can provide faster post-cast cooling because the inside of the socket is closer to the outer grip surfaces of the earplug. This, in turn, can help reduce cycle times in the manufacturing process.

Four flimsy bridges (342) in separate places connect the rods (332, 334) of the earplugs (302, 304) to the body (72) of the cord. In this embodiment, such sites are located at the nose end and grip end of each rod. Each jumper extends between one of the earplugs and the innermost turn of the cord body. In this way, the earbuds can be supported and stabilized by the body of the cord.

Fragile straps (342) can help fill the mold and keep earplug sets tidy during shipping. For the first use of the earplug kit, the straps (342) can be broken by the first user to disconnect the earbuds from the inside of the cord body.

It will be apparent to those skilled in the art that many modifications can be made to the embodiments described above without departing from the scope of the invention. Various aspects of the invention may be combined to provide embodiments including any number of the aspects disclosed herein.

A container may be provided which is integrally molded with the set of earplugs and which is foldable in any suitable manner. So, for example, the container can be folded like an accordion or compressed in any way, folding into itself.

Obviously, the mold in which the earplugs according to the present invention are made can be made with the possibility of partial replacement of parts. This may, for example, allow the 3- or 2-flange design to be modified as needed, depending on the particular application. In addition, the container and/or cord can be added to or removed from the mold as needed. This can reduce the overall cost of providing many different injection molds.

The length of the cord in embodiments of the present invention may be long enough to prevent the cord from accidentally breaking into two pieces when it is unfolded into a separate shape and to avoid excessive kinking. To ensure this, a cord length exceeding 700 mm may be sufficient. However, it should be noted that the elasticity of the material from which the cords are made can at least partially contribute to the prevention of undesirable breaking of the cord. To this end, a polymeric material, in particular a thermoplastic elastomer, can be selected that provides adequate elasticity for the desired function of the earmuffs. However, it is clear that silicone rubber can also be used.

The earplugs and associated components of the present invention can be made with detectable metal so that a metal detector can detect their presence on a person, for example, if he tries to take them out of certain rooms where this is not allowed. Silver ions can be added to earmuffs and related components to improve their hygiene.

The embodiments disclosed above, described with reference to the drawings, only illustrate earplugs with domed flanges, however, it is clear that substantially straight flanges may equally be suitable for use in various aspects of the invention. The present invention may also be implemented in earmuffs with adjustable noise attenuation. Some aspects of the invention may be suitable for use with other types of earplugs than just flanged earbuds. In particular, a cord with sound-reflecting elements can be used with any type of earplugs. The cord and earmold set molded as a single unit can be used with different types of corded earmolds, in particular foam earmolds, while the container and cord molded as a single unit may be suitable for both foam rubber earplugs, and for any other type of earmuffs connected with a cord.

The products according to the present invention, in particular containers and/or flat elements, can also be marked. Patent application numbers may also be applied to the set of earplugs during molding by embossing or engraving, as shown, for example, in FIG. 25 and 29.

The earmold sets and devices disclosed herein may offer certain advantages over other earmold products.

Thus, for example, the need for a sleeve or sleeve to close the free end of each cord is eliminated if the cord or cable is molded integrally with the liner, which is the case with the present invention. As a result, the cost and complexity of manufacturing can be reduced because fewer components and process steps are required.

In addition, the products of the present invention may be marketed as being more easily recyclable for the following reasons: (a) a single material is used in a multi-component molding process, (b) the need to disassemble a set of earmuffs into its component parts before recycling can be excluded because each set of earmuffs is a single unit and (c) the polymeric materials from which Applicant's sets can be made may eliminate some of the processing difficulties associated with some other types of sets in which cords are made of polyvinyl chloride (PVC).

As a result of fewer components used, the product may have a lower overall weight, which may lead to a reduction in electricity consumption during the manufacturing process.

Another benefit is that individual packaging may not be required depending on the type of product supplied.

In the description and claims, unless the context otherwise requires, the following words and phrases have the following meanings:

• the word "comprise" or its forms, in particular "comprises" or "comprising" should be understood to mean the inclusion of the specified element or group of elements, but not the exclusion of any other element or group of elements,

• the word "dome" and its shapes, in particular, "dome" should be understood in a broad sense, including, in particular, but without limitation, essentially hemispherical, truncated-conical, bell-shaped and/or bullet-shaped,

• the word "flange" and its forms should be understood in a broad sense, including, in particular, but without limitation, any structural element extending essentially radially from the shaft of the earmold and intended to abut against the sides of the external auditory canal for fastening in it has an anti-noise insert, and

• The phrase "sound-absorbing element" should be understood in a broad sense, including, in particular, but without limitation, any structural element having sound-suppressing, sound-insulating, sound-damping and/or sound-attenuating properties, including sound-absorbing, sound-diffusing and/or sound-reflecting properties.

Claims (18)

1. A molded set of earplugs that contains two earplugs, each of which contains a rod forming a grip at one end and a nose protrusion at the opposite end with at least one sound-absorbing element provided near the nose end, and also contains a cord passing between anti-noise inserts for connecting them with each other, and two anti-noise inserts and a cord are made as a single unit, while the sides of the cord part are connected to each other, forming a cord body. 2. A set according to claim 1, in which said sides of the cord part are defined by grooves made in the body of the cord. 3. The set of claim 1, wherein the body of the cord is substantially flat. 4. The set of claim 3 wherein the body of the cord includes a helically wound flat disc-shaped ring. 5. The assembly of claim 3, wherein the flat cord body surrounds the earplugs, wherein the stem of each earbud defines a central longitudinal axis that lies substantially in the plane of the cord body. 6. The set of claim. 1, containing at least one fragile jumper connecting at least one of the earplugs to the body of the cord. 7. The set of claim. 1, containing at least one container for storing earplugs, made as a single unit with the cord. 8. The kit according to claim 7, in which the storage container contains: first and second cap elements, each of which forms a cavity for receiving at least a part of one of the anti-noise inserts, hinge means provided between said first and second cap elements, allowing the cap elements to be rotated relative to each other to a closed position in which the cap elements are adjacent to each other and the cavities they form face each other, and blocking means for blocking with the possibility of unlocking the cap elements in the specified closed position. 9. The kit according to claim 8, in which the blocking means comprises a tack element and a complementary element that engages with the tack element, molded as a single unit with the cap elements. 10. The set of claim 9, wherein the stem of each of the two earplugs defines a central longitudinal axis, with at least a portion of the cord extending laterally from the side of each earplug in a direction transverse to the central longitudinal axis of the stem. 11. The kit according to claim 1, in which the sound-absorbing element contains sound-diffusing elements that are made in the form of ribs, or have a tetrahedral or irregular shape, or are surface texturing. 12. The kit according to claim 1, in which the grip contains at least one elongated ridge extending in the longitudinal direction along a part of the length of the grip, and at least three spaced partitions protruding essentially in the transverse direction from the specified elongated ridge, while the ridge and partitions limit the recesses made on the outer surface of the grip. 13. A method for molding a set of earplugs, comprising the step of curing a polymeric material in an injection mold that contains cavities configured to mold two earmuffs and a cord, said cavities communicating with each other, thereby providing molding of earmuffs and cord as in one piece, wherein the cord casting cavity is configured to mold the sides of the cord portion so that the sides are connected to each other to form the body of the cord. 14. The method of claim 13, wherein the cord casting cavity is configured to mold the sides of the cord portion such that the sides join together to form a substantially flat cord body. 15. The method of claim 13, wherein the cord casting cavity is configured to mold the sides of the cord portion such that they are defined by striations or lines of weakness that allow the cord body to be torn along them to form a cord.

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