Patent Application
20180176678
This application claims the benefit of European Patent Application Serial No. 16204740.1, filed Dec. 16, 2016, which is incorporated herein by reference in its entirety.
The present invention relates to a receiver assembly comprising a receiver and an assembly housing. The receiver assembly comprises a suspension structure suspending the receiver in the assembly housing to dampen vibration of the receiver.
When producing sound, a receiver also creates vibrations. Such vibrations are unwanted and may put a limit on the performance of a personal audio device, such as a hearing aid. This is due to the fact that the vibrations can be picked up by the microphone and amplified again; i.e. feedback.
Prior art document EP 1 353 531 discloses a coil and a magnet assembly mounted on a printed circuit board (PCB). The PCB may be supported by the case. The use of the PCB provides a relatively rigid planar surface allowing precise positioning of the coil and magnet assembly.
EP 3 051 841 discloses a motor assembly attached to the receiver housing by a movable suspension structure to provide an internal balancing within the receiver itself.
WO 2007/038897 discloses an elastic and flexible holding element with inwardly projecting mounting areas for holding a component in position inside a housing. Movement is dampened by compression of the inwardly projecting areas made of rubber.
EP 1 248 496 discloses a mechanical suspension structure including a back and a front suspension. The back suspension includes a back contact structure, whereas the front suspension structure includes two front contact structures. Both the back suspension and the front suspension are made of an elastomeric material, e.g. silicone rubber.
It is an object of embodiments of the invention to provide an improved receiver assembly.
It is a further object of embodiments of the invention to provide a receiver assembly where vibration of the receiver is dampened.
According to a first aspect, the invention provides a receiver assembly comprising a receiver and an assembly housing;
The receiver may be adapted to form part of any personal audio device, such as a hearing aid, such as a Behind-the-Ear (BTE) device, an In the Ear (ITE) device, a Receiver in the Canal (RIC) device, or any other personal audio device, such as headphones, earphones, and other earpieces. In the context of the present invention, the term “hearing aid” shall be understood as an electromagnetic device which is adapted to amplify and modulate sound and to output this sound to a user, such as into the ear canal of a user.
Thus, the receiver may be adapted to receive an electrical signal and output a corresponding audio signal through the sound outlet.
The receiver may comprise a magnet assembly and an armature. The magnet assembly may be arranged to provide a magnetic field in an air gap, and the armature may comprise at least one leg which extends through the air gap.
The armature may be made from any type of material, element and/or assembly able to guide or carry a magnetic flux. The armature may be electrically conducting or not.
The receiver may further comprise a diaphragm which is operationally attached to the armature, such that movement of the armature is transferred to the diaphragm. It will be appreciated that movement of the diaphragm causes sound waves to be generated. In one embodiment, the diaphragm is operationally attached to the armature by means of a diaphragm connecting member, such as a drive pin. Alternatively, the diaphragm may itself be attached to the armature.
The diaphragm may comprise a plastic material, such as a polymer, or alternatively a metal material such as aluminium, nickel, stainless steel, or any other similar material. It should however be understood, that the diaphragm may comprise a plurality of materials. The diaphragm may divide the chamber into two chambers, such as a front volume and a back volume.
It should be understood, that the receiver in one embodiment may be a balanced armature receiver, whereas the receiver in other embodiments may also comprise other transducer technologies, such as e.g. piezo technology, moving coil, electrostatic receiver technologies, and microphones, such as electret, MEMS, etc.
It should further be understood, that the assembly may comprise more than one receiver, such as two, three, or more receivers. Assemblies comprising more than one receiver may as an example comprise receivers of a single type, such as two balanced armature receivers, or may alternatively comprise receivers of different types, such as a balanced armature receiver and an electrostatic receiver.
The assembly housing may be located in a shell made of a soft material, such as silicone, thereby improving the comfort. To improve comfort further, an individual shell may be made for each user to fit the ear of the user.
The sound outlet of the receiver is arranged in communication with the assembly outlet for outlet of sound from the receiver via the assembly sound outlet.
The receiver may be formed as a substantially box-shaped element. Other shaped may however also be applicable.
The assembly housing may likewise be formed as a substantially box-shaped element. However, other shapes may also be applicable, such as shapes which fit the ear of a user.
The receiver is arranged at least partly within the assembly housing. Thus, the receiver may have an outer surface facing toward an inner surface of the assembly housing. The inner and outer surfaces may each comprise a first surface, a second surface, a third surface, and even more surface. As an example, a substantially box-shaped receiver may comprise six outer surfaces.
If the receiver and/or assembly housing is substantially box-shaped it should be understood, that the edges and corners may be rounded off. This may also be the case for receivers and assembly housings in other shapes.
The receiver assembly further comprises a suspension structure comprising at least one suspension element. The suspension structure is arranged to suspend the receiver in the assembly housing. The at least one suspension element connects the receiver and the assembly housing.
In the context of the present invention, the term “connects” not only covers embodiments where the suspension element is in contact with the receiver and the assembly housing. The suspension element may also connect the receiver and the assembly housing by being in contact with the receiver and the assembly housing via at least one additional element. It should further be understood, that the term “connects” both covers embodiment were the suspension element is contact with the receiver and/or the assembly housing and embodiment where the suspension element is attached to the receiver and/or the assembly housing.
The at least one suspension element is an elongated element extending in an longitudinal direction and is configured to dampen vibration of the receiver by deflection of the suspension element in a direction transverse to the longitudinal direction. As an example, the suspension element may comprise at least one leaf spring.
In the context of the present invention, the term “dampen vibration” should be understood as reducing vibration by decoupling the receiver from the assembly housing. It should be understood, that some vibration may still be present.
In the context of the present invention, the term “in a direction transverse to the longitudinal direction” should be understood as a direction perpendicular to the longitudinal direction and directions in the range of +/−80 degrees relative to perpendicular.
The at least one suspension element may have a thickness being a distance from one side of the suspension element to the opposite side of the suspension element substantially in the deflection direction. Furthermore, the at least one suspension element may have a width being transverse to the length and to the thickness. Typically, the thickness is the smallest dimension of the elongated element, whereas the length typically is the largest dimension of the elongated element. The length will typically be substantially larger than the thickness.
The suspension element may be made of metal, polymer, fibre reinforced plastic, multilayer composites, or combinations hereof, etc.
The at least one suspension element is formed by a sheet material; i.e. by thin, flat pieces of the required material, e.g. by flattened metal. By providing the at least one suspension element of a sheet material, it may be achieved that the space required to accommodate the suspension element may be considerably smaller than the space required for a suspension formed by a solid rubber element being arranged to provide a dampening effect in the range of the present invention.
The thickness of the at least one suspension element may be in the range of 0.01-0.25 mm. It should be understood that the thickness may vary along the length of the suspension element to thereby vary the ability of deflection along the length of the suspension element.
In one embodiment, a cross-section of the elongated element may be non-uniform along at least a part of elongated element in the longitudinal direction. Thus, the width of the at least one suspension element may vary along at least a part of the length of the element to thereby provide a non-uniform ability of deflection along the length of the suspension element.
By providing the suspension structure comprising at least one suspension element with varying width or comprising at least one suspension element having a width being smaller than at least a second suspension element with a larger width, it may be possible to tune the stiffness of the suspension structure, and thus the compliance to thereby vary the capability of dampen vibration.
It should be understood, that a plurality of suspension elements may be attached to each other by welding, gluing, or by other means. However, it should further be understood, that a plurality of suspension elements may not be attached to each other. In one embodiment, a plurality of suspension elements may be joined solely by pressing them together, as they may be arranged so that they are firmly fixed, e.g. at an end point, in the assembly housing.
The at least one suspension elements connect the receiver and the assembly housing by being attached to at least one of the receiver and the assembly housing by welding, gluing, or by other means. However, it should further be understood, that the at least one suspension element may be arranged so that it firmly fixed, e.g. at an end point, in the assembly housing.
Vibrations created by the receiver during the production of sound may thus be dampened by deflection of the at least one suspension element in a direction transverse to the longitudinal direction hereof. Furthermore, by deflection of the at least one suspension element it may be achieved that the receiver assembly operates above resonance frequency whereby the receiver may be decoupled from the assembly housing.
Due to the application of a suspension structure comprising a deflectable suspension element the receiver is movable arranged in the assembly housing whereby vibrations may be effectively decoupled.
To improve the efficiency of the at least one suspension element and thereby increase the dampening effect, the at least one suspension element may be in contact with an outer surface of the receiver at one end point and an inner surface of the assembly housing at the other end point to allow deflection of the suspension element between the end points. It should be understood, that the end points may be arranged at a distance to the opposite ends terminating of the elongated element, whereby at least one of the end points may be arranged in the area of the ends terminating the elongated elements.
By providing the least one suspension element in contact with an outer surface of the receiver at one end point and an inner surface of the assembly housing at the other end point, the distance from the suspension element to the receiver may vary along length of the elongated element, thereby facilitating deflection of the suspension element.
To be able to dampen vibration in more than one direction, two suspension elements may be arranged on two different sides of the receiver; i.e. one at each side. Alternatively or additionally, a suspension structure may form a bent section whereby a first suspension element can be arranged between a first outer surface of the receiver and an inner surface of the assembly housing and a second suspension element can be arranged between a second outer surface of the receiver and an inner surface of the assembly housing. The first and second suspension elements may extend in different directions from the bent part thereby providing a 2D suspension structure, and the bent section may be arranged at an edge of the receiver. Thus, the first and second suspension element may be arranged in series.
To be able to dampen vibration in more than two directions, three suspension elements may be arranged on three different sides of the receiver; i.e. one at each side, or one at one side and a suspension structure comprising a bent section arranged with a first suspension element at one side and a second suspension element at another side. Alternatively or additionally, a suspension structure may form a second bent section so that a third suspension element can be arranged between a third outer surface of the receiver and an inner surface of the assembly housing thereby providing a 3D suspension structure.
In embodiments comprising a 3D suspension structure; i.e. a suspension structure comprising at least one elongated element with a bend section and/or a plurality of elongated elements whereby a suspension elements is arranged along three different sides of the receiver, the stiffness and thus the compliance may be different in three directions if the width of at least some of the suspension element are different thereby enabling tuning of the stiffness in these three directions.
The receiver assembly may further comprise a deformable element arranged between the suspension element and the receiver whereby the suspension element contacts the receiver at least partly via the deformable element. The deformable element may be a dampening gel, a foam, or another material suitable to dampen vibration. The deformable element may be especially suitable for decoupling at low frequencies, as more energy is dissipated, thereby resulting in less transfer. Furthermore, it may be especially suitable for dampening in a direction transverse to the surface onto which it is arranged.
In an alternative embodiment, the deformable element may be arranged between the suspension element and the assembly housing.
To facilitate fixing of a suspension element in the assembly housing, a protrusion may be formed on the outer surface of the receiver, such as on the first outer surface or the second outer surface. The suspension element may contact the receiver at least partly at the protrusion. One end point of the suspension element may be attached to or may contact the protrusion and another end of the suspension may be attached to or may contact the inner surface of the assembly housing.
By arranging the sound outlet in communication with the assembly outlet, vibrations from the receiver may be transferred to the assembly housing. To reduce the risk of transferring such vibrations, the receiver assembly may further comprise a vibration dampening element connecting the sound outlet and the assembly sound outlet. The vibration dampening element may be compliant to enable reduction of vibrations.
In one embodiment, the vibration dampening element is compliant in at least two directions.
In the context of the present invention, the term “connects” not only covers embodiments where the vibration dampening element is in contact with the receiver and the assembly housing. The vibration dampening element may also connect the sound outlet and the assembly sound outlet by being in contact with the receiver and the assembly housing via at least one additional element.
The vibration dampening element may be more compliant in the direction of the sound outlet that in directions transverse to the sound outlet. This may be particularly interesting for receivers which primarily produce vibrations in the direction of the sound outlet, such as a dual receiver. However, is should be understood, that the vibration dampening element may in an alternative embodiment be substantially equally compliant in at least two directions.
The vibration dampening element may comprise at least one through hole allowing sound to propagate through the vibration dampening element.
The vibration dampening element may seal a passage between the sound outlet and the assembly sound outlet in order to facilitate outlet of sound from the receiver via the assembly outlet.
In one embodiment this may be achieved by arranging the vibration dampening element so that it seals a passage between an outer surface of one sound outlet and the assembly sound outlet and an inner surface of the other one of the sound outlet and the assembly sound outlet.
In one example, the sound outlet and the assembly sound outlet are provided as two elongated sound channels. The diameter of one of these sound channels may be smaller than the diameter of the other one of the sound channel to facilitate insertion of one sound channel at least partly into the other sound channel. In this embodiment the vibration dampening element may be arranged circumferential around the smaller sound channel and circumferential along the inner surface of the other sound channel, thereby sealing the passage between the two sound outlets.
It should be understood that the sound outlet, the assembly sound outlet, and the sound channels may have a circular cross-section. However, other cross-sectional shapes may also be applied. As an example, the cross-section may be oval or rectangular, or of any other arbitrary shape.
In an alternative embodiment, the vibration dampening element forms a sound channel from the sound outlet to the assembly sound outlet. In this embodiment the vibration dampening element may be attached directly to the receiver and to the assembly housing. It should however be understood, that the vibration dampening element may be attached to at least one of the receiver and the assembly housing via one or more connecting element, e.g. to facilitate connection hereof.
The vibration dampening element may as an example be formed by a polymer material or by a metal, or combinations hereof. In one embodiment, the vibration dampening element may be made of an elastic foil, such as a thin rubbery foil to thereby achieve sufficient compliance.
By providing the suspension structure and the vibration dampening element for the sound outlet as separate elements, these elements may be individually optimised leading to a more optimal system which covers both vibration dampening relating to the positioning of the receiver in the assembly housing and relating to outlet of sound from the receiver via the sound outlet and the assembly sound outlet.
The receiver assembly may further comprise a compressible dampening element arranged between an outer surface of the receiver and an inner surface of the assembly housing to dampen vibration of the receiver, as vibration may be dampened by compression of the element.
The compressible dampening element may in one embodiment comprise a substantially flat base element having a plurality of deformable protrusions extending toward at least one of an outer surface of the receiver and an inner surface of the assembly housing.
As an example, the substantially flat base may be attached to the outer surface of the receiver by gluing, whereby the deformable protrusions may extend toward an inner surface of the assembly housing and may be in contact herewith. It should be understood, that the substantially flat base element may likewise be attached to the inner surface of the assembly housing whereby the deformable protrusions may extend toward the outer surface of the receiver.
The substantially flat base element may facilitate attachment of the compressible dampening element, as it can easily be arranged at an outer surface of the receiver due to the size and shape hereof. To further facilitate attachment of the compressible dampening element, the base element may be stiff, e.g. by providing it of metal, whereas the deformable protrusions may as an example be made of a polymer.
The dampening performance of the compressible dampening element may be changed by changing at least one of the size, shape, and position/pattern of the deformable protrusions.
The compressible dampening element may further act as shock protection. This may be achieved by providing some of the protrusions of a smaller height whereby there is no contact between the smaller protrusions and the inner surface of the assembly housing. To improve the shock protecting effect, these smaller protrusions may be filled with a dampening material, such as a dampening gel or a foam.
It should further be understood, that the deformable protrusions may be hollow or solid. In one embodiment, both hollow and solid protrusions may be present.
The receiver assembly may further comprise a pre-tensioned element suspended between an outer surface of the receiver and an inner surface of the assembly housing. By using a pre-tensioned suspension element, the receiver may be compliantly suspended. Furthermore, the pre-tensioned element may be substantially flat thereby only taking up little space in the assembly housing. As the pre-tensioned suspension elements may be provided at different width, it may be possible to change the stiffness of the suspension and thereby adapt the vibration dampening effect to e.g. different types and/or sizes of receivers.
The at least one suspension element may be arranged so that it forms at least a first and a second chamber in the assembly housing, when the suspension element contacts both an inner surface of the assembly housing and an outer surface of the receiver. To decrease the vibration peaks, the receiver assembly may further comprise a vent arranged in communication with the first and second chamber. Furthermore, the vent may increase the output of the receiver.
In an alternative embodiment, the vent may be arranged in communication with one of the first and second chambers and with the outside; i.e. outside the assembly housing.
Traditionally, power is transferred from outside the receiver to the receiver by use of normal wires, such as solid or litz wires. In order let the receiver move within the receiver housing, the wires are provided at additional length, whereby one or more slack loops may be present in the assembly housing.
Effective vibration dampening may depend on the total mechanical connection path between the receiver and the assembly housing. Consequently, also the wires may contribute to the vibration performance of the receiver assembly.
To improve the vibration dampening effect, at least one of the suspension elements may be electrically conductive and may be arranged between an electrical connector of the receiver and an electrical connector of the assembly housing.
As an example, a flex print may be used as a suspension element to enable both mechanical and electrical connection between the receiver and the assembly housing.
As the receiver assembly may be exposed to mechanical shocks, e.g. if dropped on the floor, it may be an advantage if the receiver assembly further comprises a shock protection element arranged in the assembly housing, as this may protect the receiver from impact from the assembly housing. The shock protection element may have a higher compliance than the vibration dampening element. By providing the suspension structure and the shock protection as separate elements, these elements may be individually optimised leading to a more optimal system which covers both vibration dampening and shock protection.
Thus, it may be possible to provide an optimised system in which the suspension structure, the vibration dampening element for the sound outlet, and the shock protection are provided as separate elements which can be individually optimised.
To ensure sufficient efficiency, the shock protection element may be made of a soft material such as a foam. The shock protection effect may be achieved by a combination of the physical properties and the dimensions of the shock protection element. As an example, a shock protection element in the form of a foam with micro pores provided at a thickness of 0.4 mm may provide the same shock protection as a shock protection element of latex; i.e. a polymer, provided at a thickness of 0.25 mm, since these shock protection elements have the same mechanical stiffness due to the combination of their mechanical properties and dimensions.
It should be understood that other materials and/or thicknesses and/or combinations of materials and/or thicknesses may also be possible.
The shock protection element may be attached to at least one of an outer surface of the receiver and an inner surface of the assembly housing. The shock protection element may only be in contact with one of the receiver and the assembly housing. However, during a mechanical shock it may touch both the receiver and the assembly housing to thereby lower the impact of a shock.
It should be understood, that the receiver assembly may comprise a plurality of shock protection elements. As an example, a shock protection element may be arranged on each side of the receiver to protect the receiver from impact on each side.
In one embodiment, the receiver may comprise an additional sound outlet, and the assembly housing may comprise an additional assembly sound outlet, where the additional sound outlet is arranged in communication with the additional assembly sound outlet for outlet of sound from the receiver via the additional assembly sound outlet. The receiver may be a module of two receivers or a dual receiver with two sound outlets.
It should be understood, that the receiver may be traditional dual receiver with a common sound outlet, where the common sound outlet of the dual receiver forms the sound outlet.
In one embodiment, the receiver assembly may further comprise an additional receiver comprising an additional sound outlet and a joiner. The joiner may comprise a spout portion forming at least one sound channel extending through the spout portion and a mounting plate portion having a first surface and an opposite second surface. The mounting plate portion may comprise first engagement means for engaging the receiver at the first surface, and second engagement means for engaging the additional receiver at the second surface. When arranging the receiver and the additional receiver on opposite sides of the mounting plate portion, the sound outlet and the additional sound outlet can be aligned with one of the at least one sound channels extending through the spout portion.
By use of a joiner assembling, positioning and alignment of the receiver and the additional receiver may be facilitated and may in some embodiments even be carried out without the use of additional fixture elements.
According to a second aspect, the invention provides a personal audio device comprising a receiver assembly according to the first aspect of the invention, wherein the receiver is configured to generate sound whereby it vibrates within a frequency range of 10 Hz-20 kHz, and wherein the at least one suspension element is configured to deflect to thereby dampen vibration of the receiver.
The frequency range may depend on the type of personal audio device in which the receiver is used.
It should be understood, that a skilled person would readily recognise that any feature described in combination with the first aspect of the invention could also be combined with the second aspect of the invention, and vice versa.
The receiver assembly according to the first aspect of the invention is very suitable for the person audio device according to the second aspect of the invention. The remarks set forth above in relation to the receiver assembly are therefore equally applicable in relation to the personal audio device.
According to a third aspect, the invention provides a receiver assembly comprising a receiver and an assembly housing;
The compressible element may comprise a substantially flat base element having a plurality of deformable protrusions extending toward at least one of an outer surface of the receiver and an inner surface of the assembly housing. The deformable protrusions may be hollow or solid. In one embodiment, both hollow and solid protrusions may be present.
According to a fourth aspect, the invention provides a receiver assembly comprising a receiver and an assembly housing;
According to a fifth aspect, the invention provides a receiver assembly comprising a receiver and an assembly housing;
According to a sixth aspect, the invention provides a receiver assembly comprising a receiver and an assembly housing;
It should be understood, that a skilled person would readily recognise that any feature described in combination with the first aspect of the invention could also be combined with the any of the third, fourth, fifth, and sixth aspects of the invention, and vice versa.
The remarks set forth above in relation to the receiver assembly according to the first aspect of the invention are therefore equally applicable in relation to any of the third, fourth, fifth, and sixth aspects of the invention.
Furthermore, the features of any of the third, fourth, fifth, and sixth aspects of the invention are applicable in relation to any of the first, second, third, fourth, fifth, and sixth aspects of the invention.
Embodiments of the invention will now be further described with reference to the drawings, in which:
It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
The receiver assembly 1 comprises a receiver 2 and an assembly housing 3. The assembly housing 3 is formed by an upper section 3A and a lower section 3B.
The receiver 2 comprises a magnet assembly 4 (see
The receiver 2 comprises an outer surface 8; i.e. at least a first 8A, a second outer surface 8B, and a third outer surface 8C. The receiver 8 is arranged at least partly within the assembly housing 3.
The assembly housing 3 comprises an assembly sound outlet 9 (see e.g.
The receiver assembly 1 further comprises two suspension structures 10 each comprising three suspension elements 10A, 10B, 10C. The suspension structures 10 suspend the receiver 2 in the assembly housing 3. Each suspension element 10 connects the receiver 2 and the assembly housing 3.
Each suspension element 10 is an elongated element extending in a longitudinal direction and is configured to dampen vibration of the receiver 2 by deflection of the suspension element 10 in a direction transverse to the longitudinal direction.
As illustrated, the elongated suspension element 10 may comprise additional elements transverse to the elongated part.
In the illustrated embodiment, the suspension structure 10 forms two bent sections 11 whereby a first suspension element 10A is arranged between the first outer surface 8A and an inner surface of the assembly housing 3, a second suspension element 8B is arranged between the second outer surface 8B and an inner surface of the assembly housing, and third the suspension element 10C is arranged between a third outer surface 8C and an inner surface of the assembly housing 3. The first 10A and second 10B suspension elements extend in different directions from the bent part 11A, whereas the second 10B and third 10C suspension elements extend in different directions from the bent part 11B.
The illustrated suspension structure 10 thereby forms a 3D structure enabling dampening of vibration in three different directions relative to the receiver 2.
The receiver assembly 1 further comprises shock protection elements 12 arranged in the assembly housing 3, as this may protect the receiver 2 from impact from the assembly housing 3, e.g. if the receiver assembly 1 is dropped. The shock protection element 12 is made of a soft material, such as a foam.
In
In
In
The receiver assembly 101 further comprises two suspension structures 110, 110′. The suspension structures 110, 110′ suspend the receiver 102, 102′ in the assembly housing 103.
As illustrated in
The illustrated suspension structure 110, 110′ forms a 1D structure enabling dampening of vibration in one direction relative to the receiver 102, 102′.
The receiver assembly 101 comprises a vibration dampening element 115 connecting the sound outlet 107 and the assembly sound outlet 109. The vibration dampening element 115 is compliant to enable reduction of vibrations.
In the illustrated embodiment, the vibration dampening element 115 forms a sound channel from the sound outlet 107 to the assembly sound outlet. The vibration dampening element 115 is attached to the receiver 202 and to the assembly housing 203.
The receiver assembly 201 further comprises four suspension structures 210. The suspension structures 210 suspend the receiver 202 in the assembly housing (not shown).
The suspension structures 210 each forms two bent sections 211 whereby a first suspension element 210A is arranged between the first outer surface 208A and an inner surface of the assembly housing, and a second suspension element 208B is arranged between the second outer surface 208B and an inner surface of the assembly housing.
The illustrated suspension structures 210 thereby each forms a 2D structure enabling dampening of vibration in two directions relative to the receiver 202.
In
The receiver assembly 1 comprises a vibration dampening element 15 connecting the sound outlet 7 and the assembly sound outlet 9. The vibration dampening element 15 is compliant to enable reduction of vibrations.
In the illustrated embodiment, the vibration dampening element 15 forms a sound channel from the sound outlet 7 to the assembly sound outlet. The vibration dampening element 15 is attached to the receiver 2 and to the assembly housing 3.
The receiver 302 comprises a magnet assembly (not shown), an armature (not shown), a diaphragm 306 being operationally attached to the armature, and a sound outlet 307 configured to outlet sound from the receiver 302.
The assembly housing 303 comprises an assembly sound outlet 309 arranged in communication with the sound outlet 307 for outlet of sound from the receiver 302 via the assembly outlet 309.
The receiver assembly 301 comprises a vibration dampening element 315 connecting the sound outlet 307 and the assembly sound outlet 309. The vibration dampening element 315 is compliant to enable reduction of vibrations.
In the illustrated embodiment, the vibration dampening element 315 forms a sound channel from the sound outlet 307 to the assembly sound outlet. The vibration dampening element 315 is attached to the receiver 302 and to the assembly housing 303.
The receiver 302 comprises an outer surface 308. The receiver assembly 302 further comprises two compressible dampening elements 316 arranged between the outer surface 308 of the receiver 302 and an inner surface of the assembly housing 303 to dampen vibration of the receiver. It should be understood, that the compressible dampening elements 316 can be used in combination with a suspension structure as illustrated e.g. in
The compressible dampening element 316 comprises a substantially flat base element 317 having a plurality of deformable protrusions 318 extending toward the inner surface of the assembly housing 302 and being in contact herewith.
The compressible dampening 316′ element may further act as shock protection as illustrated by the embodiment of
In the illustrated embodiment, the receiver assembly 401, 401′ comprises a pre-tensioned element 410, 410′ suspended between an outer surface of the receiver 402 and an inner surface of the assembly housing 403. When using a pre-tensioned suspension element 410, 410′, the receiver 402 can be compliantly suspended. Furthermore, as the pre-tensioned element 410, 410′ is substantially flat, it thereby only takes up little space in the assembly housing 302.
The receiver 502 comprises a magnet assembly (not shown), an armature (not shown), a diaphragm 506 being operationally attached to the armature, and a sound outlet 507 configured to outlet sound from the receiver 502.
The assembly housing 503 comprises an assembly sound outlet 509 arranged in communication with the sound outlet 507 for outlet of sound from the receiver 502 via the assembly outlet 509.
The receiver assembly 501 comprises a vibration dampening element 515 connecting the sound outlet 507 and the assembly sound outlet 509. The vibration dampening element 515 is compliant to enable reduction of vibrations.
In the illustrated embodiment, the vibration dampening element 515 forms a sound channel from the sound outlet 507 to the assembly sound outlet. The vibration dampening element 515 is attached to the receiver 502 and to the assembly housing 503.
The vibration dampening element 515 comprises a through hole allowing sound to propagate through the vibration dampening element.
Additionally, three suspension elements 515′ are arranged in the assembly housing 503 and connect the receiver 502 and the assembly housing 503. The suspension elements 515′ are similar to the vibration dampening element 515, however without a through hole. Due to the compliance of the suspension element 515′, the receiver 502 is movable suspended in the assembly housing 503. It should be understood, that the suspension elements 515′ can be used in combination with a suspension structure as illustrated e.g. in
The suspension elements 515′ are arranged so that they form a first and a second chamber 521, 522 in the assembly housing 503, as the suspension elements 515′ contact both the inner surface of the assembly housing 503 and the outer surface of the receiver 502. To decrease the vibration peaks, the receiver assembly 501 further comprises three vents 520, each being arranged in communication with a first and a second chamber 521, 522.
The receiver 602 illustrated is movably suspended in the assembly housing 603 by a suspension structure 610, 610′.
The suspension structure 610 schematically illustrated in
The suspension elements 610′ are electrically conductive and are arranged between an electrical connector 623 of the receiver 602 and an electrical connector 624 of the assembly housing 603. In the illustrated embodiment, the electrically conductive suspension elements 610′ are flex prints thereby enabling both mechanical and electrical connection between the receiver 602 and the assembly housing 603.
In
In
In
In
The receiver assembly 601A, 601B, 601C, 601D comprises a vibration dampening element 615 connecting the sound outlet 607 and the assembly sound outlet 609. The vibration dampening element 615 is compliant to enable reduction of vibrations. In the illustrated embodiment, the vibration dampening element 615 forms a sound channel from the sound outlet 607 to the assembly sound outlet.
The receiver assembly 1′ comprises a receiver 2′ and an assembly housing 3′. The assembly housing 3′ is formed by an upper section 3A′ and a lower section 3B′.
The receiver 2′ comprises an outer surface 8′; i.e. at least a first 8A′, a second outer surface 8B′, and a third outer surface 8C′. The receiver 8′ is arranged at least partly within the assembly housing 3.
The assembly housing 3′ comprises an assembly sound outlet 9′ arranged in communication with the sound outlet (not shown) for outlet of sound from the receiver 2′ via the assembly outlet 9′.
The receiver assembly 1′ further comprises a suspension structure 10′ comprising suspension elements 10′A, 10′B, 10′C. The suspension structure 10′ suspends the receiver 2′ in the assembly housing 3′.
Each suspension element 10′ is an elongated element extending in a longitudinal direction and is configured to dampen vibration of the receiver 2′ by deflection of the suspension element 10′ in a direction transverse to the longitudinal direction.
As illustrated, the elongated suspension element 10′ may comprise additional elements transverse to the elongated part.
In the illustrated embodiment, the suspension structure 10′ forms four bent sections 11′ whereby a first suspension element 10A′ is arranged between the first outer surface 8A′ and an inner surface of the assembly housing 3′, a second suspension element 10B′ is arranged between the second outer surface 8B′ and an inner surface of the assembly housing, and third the suspension element 10C′ is arranged between a third outer surface 8C′ and an inner surface of the assembly housing 3′. The first 10A′ and second 10B′ suspension elements extend in different directions from the bent part 11A′, whereas the first 10A′ and third 10C′ suspension elements extend in different directions from the bent part 11B′.
The illustrated suspension structure 10′ thereby forms a 3D structure having a trapezoidal shape enabling dampening of vibration in three different directions relative to the receiver 2′. Due to the trapezoidal shape of the suspension structure, see
The first suspension element 10A′ is arranged between the first outer surface 8A′ and an inner surface of the assembly housing 3′. As illustrated in
As illustrated in
The second suspension element 10B′ is arranged between the second outer surface 8B′ and an inner surface of the assembly housing 3′. In the illustrated embodiment, this part of the suspension structure is substantially parallel to the bottom of the receiver 2′ and in contact with the lower inner surface of the assembly housing.
The third suspension element 10C′ is arranged between a third outer surface 8C′ and an inner surface of the assembly housing 3′. In the illustrated embodiment, this part of the suspension structure is substantially parallel to the upper surface 8C′ of the receiver 2′ and in contact with this upper surface.
By providing the suspension structure 10′ so that the third suspension element 10C′ is in contact with the upper surface 8C′ and so that the second suspension element 10B′ is in contact with the opposite lower inner surface of the assembly housing 3′, the suspension structure 10′ is self-supporting and works in all directions. I.e. the suspension structure 10′ will be able to dampen vibrations independent of the direction of gravity and can thus be turned upside down without affecting the dampening possibilities hereof.
| Number | Date | Country | Kind |
|---|---|---|---|
| 16204740.1 | Dec 2016 | EP | regional |
