CN218124899U

CN218124899U - Earphone driver

Info

Publication number: CN218124899U
Application number: CN202222232708.2U
Authority: CN
Inventors: 符建
Original assignee: Razer Asia Pacific Pte Ltd
Current assignee: Razer Asia Pacific Pte Ltd
Priority date: 2021-08-24
Filing date: 2022-08-24
Publication date: 2022-12-23
Anticipated expiration: 2032-08-24
Also published as: TWM639126U; DE202022104734U1; AU2021106842A4

Abstract

The utility model relates to an earphone driver, this earphone driver include circular base structure, and circular base structure has: an annular groove portion in which a continuous uninterrupted annular bottom surface, a convex inner circular wall along an inner circumference and a convex outer circular wall along an outer circumference bound an annular acoustic chamber; an annular flange extending radially from the raised outer circular wall, the annular flange having a plurality of through holes; and an auxiliary duct having: an arcuate base abutting the outer circular wall of the boss; and an arcuate sidewall extending between the arcuate base and the annular flange to define an auxiliary acoustic cavity therein, wherein the arcuate sidewall includes a plurality of side through-holes. The headphone driver includes: a permanent ring magnet disposed within the inner circular wall of the protrusion; the vibrating diaphragm is arranged on the circular substrate structure; and a coil attached to the diaphragm for coacting with the permanent ring magnet to vibrate the diaphragm when an electric current is passed through the coil.

Description

Earphone driver

Technical Field

Various embodiments are generally directed to a headphone driver.

Background

The related art earphones mainly include a dynamic coil type speaker driver, and are classified as a closed back earphone or an open back earphone. Most of these speaker drivers have an aperture at the bottom of the driver frame and a mesh is placed over the aperture for tuning the speaker driver. However, these prior art headsets produce sound that is not of sufficient quality. For example, during an experience game, the footstep sounds produced by prior art headsets are often unclear. Further, the gunshot, voice of the player's communication, or human voice may be unclear, or muted, or softer than other sounds produced during the experience game.

Accordingly, there is a need for an improved headphone driver that can improve the sound quality of headphones.

SUMMERY OF THE UTILITY MODEL

According to various embodiments, a headphone driver is provided. The headphone driver includes a circular base structure having a central axis extending vertically therethrough. The circular base structure includes an annular trough portion having a geometric center located at a central axis, the annular trough portion having: a continuous uninterrupted annular bottom surface; a raised inner circular wall along an inner circumference of the continuous uninterrupted annular bottom surface and protruding from the continuous uninterrupted annular bottom surface in a first axial direction; and a raised outer circular wall protruding from the continuous uninterrupted annular floor along an outer circumference of the continuous uninterrupted annular floor and in the first axial direction, wherein the continuous uninterrupted annular floor, the raised inner circular wall, and the raised outer circular wall define an annular acoustic cavity. The circular base structure includes an annular flange extending radially outward from the raised outer circular wall relative to the central axis, the annular flange having a plurality of through-holes extending between an upper surface facing in a first axial direction and a lower surface facing in a second axial direction opposite the first axial direction. The circular base structure comprises an auxiliary duct (duct) extending alongside the outer surface of at least the arc-shaped portion of the raised outer circular wall in its circumferential direction and along the lower surface of the corresponding portion of the annular flange. The auxiliary duct includes: an arcuate base abutting the convex outer circular wall; and an arcuate sidewall extending between the arcuate base and a corresponding portion of the annular flange so as to define an auxiliary acoustic cavity between the raised outer circular wall, the arcuate sidewall, the arcuate base, and the corresponding portion of the annular flange. The arcuate sidewall includes a plurality of side through holes. The headphone driver further includes: a permanent ring magnet disposed within a central cavity defined by the raised inner circular wall of the annular groove portion; a diaphragm (diaphragm) provided on the circular base structure so as to cover the upper surface of the annular flange, the annular acoustic chamber of the annular groove portion, and the permanent ring magnet; and a coil attached to the central region of the diaphragm and suspended relative to the permanent ring magnet so as to be able to co-act with the permanent ring magnet to vibrate the diaphragm when current is passed through the coil.

Drawings

In the drawings, like reference numerals generally refer to the same components throughout the different views. The drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention. In the following description, various embodiments are described with reference to the following drawings, in which:

fig. 1A shows a schematic diagram of a cross-sectional view of a headphone driver according to various embodiments;

fig. 1B shows a schematic diagram of a cross-sectional exploded view of the headphone driver of fig. 1A, in accordance with various embodiments;

fig. 1C shows a schematic diagram of a top view of the earphone driver of fig. 1A without a diaphragm of the earphone driver, in accordance with various embodiments;

fig. 2A illustrates a cross-sectional view of a headphone driver in accordance with various embodiments;

fig. 2B illustrates an exploded view of the headphone driver of fig. 2A, in accordance with various embodiments;

fig. 2C illustrates an assembly diagram of the headphone driver of fig. 2B in accordance with various embodiments;

fig. 3A illustrates a bottom perspective view of a first portion 120a of the circular base structure of the headset of fig. 2A, in accordance with various embodiments;

FIG. 3B illustrates a top view of a first portion of the circular base structure of FIG. 3A, in accordance with various embodiments;

fig. 3C illustrates a top perspective view of a second portion of the circular base structure of the headset of fig. 2A, in accordance with various embodiments; and

figure 3D illustrates a top view of a second portion of the circular base structure of figure 3C, in accordance with various embodiments.

Detailed Description

The embodiments described below in the context of a device are equally valid for the corresponding method and vice versa. Further, it is to be understood that the embodiments described below can be combined, e.g., a portion of one embodiment can be combined with a portion of another embodiment.

It should be understood that the terms "on" \8230;, "" on "\823030";, "" on "\8230"; are used in the following description, as they are used, are used for convenience and to aid in understanding the relative position or orientation, and are not intended to limit the orientation of any device or structure or any portion thereof. In addition, the singular terms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Similarly, the word "or" is intended to include "and" unless the context clearly indicates otherwise.

Various embodiments are generally directed to a headphone driver. According to various embodiments, the headphone driver may improve the sound quality of the headphones. According to various embodiments, the headphone driver may be a dynamic driver. According to various embodiments, the headphone driver may be configured to enhance the quality of mid-range (or mid-range) and/or mid-low range (or mid-low range) sounds, which are typically associated with footsteps and/or gunshots in gaming applications. According to various embodiments, the cavity volume within the headphone driver may be increased to enhance mid and/or mid low frequency sound. According to various embodiments, the headphone driver may comprise additional acoustic cavities to improve mid-and/or mid-low frequency sound. According to various embodiments, the headphone driver may be configured to flatten sound pressure in order to enhance mid and/or mid low frequency sound. According to various embodiments, the number, configuration and arrangement of acoustic cavities in the headphone driver may be configurable to enhance the quality of mid and/or mid low frequency sound. According to various embodiments, the cavity volume and/or damping corresponding to different regions of the diaphragm of the earphone driver may be configured to improve sound quality. According to various embodiments, the base structure or the driver mount or the driver frame may be configured to include a first acoustic cavity and a second acoustic cavity. According to various embodiments, the second acoustic cavity may be along a perimeter of the first acoustic cavity. According to various embodiments, the headphone driver may comprise a central tuning tube, a first acoustic cavity surrounding the central tuning tube, and a second acoustic cavity along an outside of the first acoustic cavity.

Fig. 1A shows a schematic diagram of a cross-sectional view of a headphone driver 100 according to various embodiments. Fig. 1B illustrates a schematic diagram of a cross-sectional exploded view of the headphone driver 100 of fig. 1A, in accordance with various embodiments. Fig. 1C shows a schematic diagram of a top view of the earphone driver 100 of fig. 1A without the diaphragm 110 of the earphone driver 100, in accordance with various embodiments. According to various embodiments, the headphone driver 100 may include a circular base structure 120 (or driver mount or driver frame). According to various embodiments, the circular base structure 120 may serve as a frame or base or support that provides a physical form or body to the headphone driver 100. According to various embodiments, the circular base structure 120 may include a central axis 129 extending vertically therethrough. Thus, the central axis 129 may pass through the center of the circular base structure 120 and may be perpendicular to the circular base structure 120.

According to various embodiments, the circular base structure 120 may include an annular groove portion 122. According to various embodiments, the annular groove portion 122 may have a geometric center located on the central axis 129 of the circular base structure 120. Thus, the central axis 129 of the circular base structure 120 may extend through or past the geometric center of the annular slot portion 122. Accordingly, the annular groove portion 122 may surround the central axis 129 of the circular base structure 120.

According to various embodiments, the annular groove portion 122 of the circular base structure 120 may include a continuous uninterrupted annular bottom surface 124. According to various embodiments, the continuous uninterrupted annular floor 124 may be an annular surface or region bounded by two concentric circles (i.e., an outer circle and an inner circle having a common center point) forming an inner circumference 123 and an outer circumference 125. Thus, a continuous uninterrupted annular bottom surface 124 may be defined by an inner circumference 123 and an outer circumference 125. According to various embodiments, the continuous uninterrupted annular floor 124 may be free of (or devoid of) any gaps or holes. Thus, the continuous uninterrupted annular floor 124 may be a complete solid surface covering the entire area or extent bounded by the inner circumference 123 and the outer circumference 125.

According to various embodiments, the continuous uninterrupted annular bottom surface 124 may face (or face) a first axial direction 129a along the central axis 129. Accordingly, the continuous uninterrupted annular bottom surface 124 may be oriented perpendicular to the central axis 129 so as to face the first axial direction 129a.

According to various embodiments, the annular groove portion 122 of the circular base structure 120 may include a raised inner circular wall 126. According to various embodiments, the raised inner circular wall 126 may be along the inner circumference 123 of the continuous uninterrupted annular bottom surface 124. According to various embodiments, the convex inner circular wall 126 may protrude from the continuous uninterrupted annular floor 124 in a first axial direction 129a along the central axis 129. According to various embodiments, the raised inner circular wall 126 of the annular groove portion 122 may be a single wall structure forming a closed circle. Thus, the raised inner circular wall 126 may be a hollow cylindrical wall structure. According to various embodiments, the convex inner circular wall 126 of the annular groove portion 122 may extend upwardly from the inner circumference 123 of the continuous uninterrupted annular bottom surface 124 in a first axial direction 129a along the central axis 129. Thus, the convex inner circular wall 126 of the annular groove portion 122 may extend perpendicularly from the continuous uninterrupted annular floor 124. According to various embodiments, the raised inner circular wall 126 of the annular slot portion 122 may enclose or surround or encompass or delimit the central cavity 130 of the circular base structure 120. Thus, the central cavity 130 may be defined within or within the raised inner circular wall 126 of the annular groove portion 122. According to various embodiments, the bore axis (or centerline) of central lumen 130 may coincide with central axis 129.

According to various embodiments, the annular groove portion 122 of the circular base structure 120 may include a raised outer circular wall 128. According to various embodiments, the raised outer circular wall 128 may be along the outer circumference 125 of the continuous uninterrupted annular floor 124. According to various embodiments, the raised outer circular wall 128 may protrude from the continuous uninterrupted annular floor 124 in a first axial direction 129a along the central axis 129. According to various embodiments, the raised outer circular wall 128 of the annular trough portion 122 may be a single wall structure forming a closed circle. Thus, the raised outer circular wall 128 may be a hollow cylindrical wall structure. According to various embodiments, the convex outer circular wall 128 of the annular groove portion 122 may extend upwardly from the outer circumference 125 of the continuous uninterrupted annular floor 124 in a first axial direction 129a along a central axis 129. Thus, the raised outer circular wall 128 of the annular groove portion 122 may extend perpendicularly from the continuous uninterrupted annular floor 124.

According to various embodiments, the raised outer circular wall 128 and the raised inner circular wall 126 may form a concentric configuration. Thus, the raised outer circular wall 128 and the raised inner circular wall 126 may form a pair of opposing walls, and thus, the raised outer circular wall 128 may surround the raised inner circular wall 126. According to various embodiments, the continuous uninterrupted annular floor 124, the raised inner circular wall 126, and the raised outer circular wall 128 may define an annular acoustic cavity 132 (or first acoustic cavity). Thus, the annular acoustic chamber 132 may be an annular space between the raised inner circular wall 126 and the raised outer circular wall 128. According to various embodiments, each of the raised outer circular wall 128 and the raised inner circular wall 126 may be a solid wall that may be continuous and uninterrupted so as to be free of (or without any) gaps or holes. According to various embodiments, sound projected into the annular sound cavity 132 may be reflected by the continuous uninterrupted annular floor 124 and/or the raised outer circular wall 128 and/or the raised inner circular wall 126.

According to various embodiments, the circular base structure 120 may include an annular flange 134. According to various embodiments, the annular flange 134 may extend radially outward from the raised outer circular wall 128 relative to the central axis 129. According to various embodiments, the annular flange 134 may be a flat ring or flat collar that projects outwardly from the raised outer circular wall 128 in a radial direction away from the raised inner circular wall 126 relative to the central axis 129.

According to various embodiments, the annular flange 134 may be offset from the continuous uninterrupted annular floor 124 of the annular groove portion 122 in the first axial direction 129a such that the continuous uninterrupted annular floor 124 of the annular groove portion 122 may form a recessed or receding surface with respect to the annular flange 134 that recedes from the annular flange 134 in the second axial direction 129b along the central axis 129. Thus, the annular acoustic cavity 132 of the annular groove portion 122 may resemble an annular groove or channel recessed from the annular flange 134.

According to various embodiments, the annular flange 134 may extend from the rim 128a of the raised outer circular wall 128. Thus, the annular flange 134 may extend radially outward from the upper or top edge of the raised outer circular wall 128 to form a circular overhang (overlap) around the upper or top edge of the raised outer circular wall 128. Thus, the annular flange 134 may be a protruding lip or rim or collar of the mouth of the annular groove portion 122.

According to various embodiments, the annular flange 134 may include an upper surface 133 and a lower surface 135. The upper surface 133 and the lower surface 135 may be opposite surfaces of the annular flange 134. According to various embodiments, an upper surface 133 of the annular flange 134 may face in a first axial direction 129a along the central axis 129 and a lower surface 135 of the annular flange 134 may face in a second axial direction 129b along the central axis 129. The second axial direction 129b may be opposite the first axial direction 129a along the central axis 129. Thus, the upper surface 133 of the annular flange 134 may face or be oriented in the same direction as the continuous uninterrupted annular bottom surface 124 of the annular groove portion 122. Thus, the lower surface 135 of the annular flange 134 may face or face in an opposite direction away from the upper surface 133 of the annular flange 134.

According to various embodiments, the annular flange 134 may include a plurality of through-holes 136. The plurality of through-holes 136 may include two or three or four or five or six or more through-holes. According to various embodiments, a plurality of through-holes 136 may extend between the upper surface 133 and the lower surface 135 of the annular flange 134. Thus, each through-hole 136 may pass completely through the annular flange 134 from the upper surface 133 to the lower surface 135. According to various embodiments, a plurality of through holes 136 may be distributed along the annular flange 134. According to various embodiments, the plurality of through-holes 136 may be arranged or spaced apart in a circular configuration or in a circumferential direction along the annular flange 134. Thus, the plurality of through-holes 136 may be dispersed or interspersed or ordered along the annular flange 134 so as to follow the curvature of the annular flange 134.

According to various embodiments, each through-hole 136 of the annular flange 134 may have a hole axis 137 (or centerline) parallel to the central axis 129. Accordingly, each through-hole 136 may extend through the annular flange 134 between the upper surface 133 and the lower surface 135 of the annular flange 134. Thus, each through-hole 136 may be a straight hole extending vertically through the annular flange 134.

According to various embodiments, the circular base structure 120 may include an auxiliary conduit 140. According to various embodiments, the auxiliary conduit 140 may extend in a circumferential direction of the convex outer circular wall 128 alongside the outer surface 127 of at least the arc-shaped portion of the convex outer circular wall 128. Accordingly, the auxiliary conduit 140 may line the outside of the raised outer circular wall 128 and extend in the circumferential direction of the raised outer circular wall 128 to extend over or cover at least the arcuate portion of the raised outer circular wall 128. For example, the secondary conduit 140 may extend at least 270 ° about the central axis 129. Thus, the secondary conduit 140 may extend around the central axis 129 over or cover an arcuate portion of the raised outer circular wall 128 that is at least 270 °. According to various embodiments, the secondary conduit 140 may extend over only an arcuate portion of the raised outer circular wall 128, i.e., may not extend over a full turn of the raised outer circular wall 128 (see, e.g., fig. 2B). Accordingly, the secondary conduit 140 may only partially surround the raised outer circular wall 128. Thus, the secondary conduit 140 may extend only over the arcuate portion of the raised outer circular wall 128. Accordingly, the auxiliary duct 140 may have a curved shape, an arcuate shape, an arc shape, or a C shape. According to various other embodiments (not shown), the auxiliary conduit 140 may extend over a full turn of the raised outer circular wall 128 so as to completely surround or encompass the raised outer circular wall 128. Accordingly, the auxiliary conduit 140 may be circular or annular in shape.

According to various embodiments, the auxiliary conduit 140 may be along the lower surface 135 of the corresponding portion of the annular flange 134. According to various embodiments, the auxiliary conduit 140 may abut the lower surface 135 of the corresponding portion of the annular flange 134 in that the auxiliary conduit 140 extends in the circumferential direction of the raised outer circular wall 128 to extend over or cover at least an arcuate portion of the raised outer circular wall 128. Thus, the auxiliary conduit 140 may be directly below the annular flange 134 and line the outside of the raised outer circular wall 128. Thus, the auxiliary conduit 140 may extend circumferentially directly below the annular flange 134 to extend over or cover at least the arcuate portion of the raised outer circular wall 128.

According to various embodiments, the auxiliary conduit 140 may include an arcuate base 142. According to various embodiments, the arcuate base 142 may abut an arcuate portion of the raised outer circular wall 128. According to various embodiments, the arcuate base 142 may line the outer surface 127 of the raised outer circular wall 128 and extend in a circumferential direction of the raised outer circular wall 128. Thus, the curvature of the arcuate base 142 may follow the curvature of the convex outer circular wall 128 in the circumferential direction. According to various embodiments, depending on whether the auxiliary conduit 140 extends over only an arcuate portion of the raised outer circular wall 128 or over a full turn of the raised outer circular wall 128, the arcuate base 142 may correspondingly extend over the raised outer circular wall 128 in a circumferential direction of the raised outer circular wall 128 (e.g., a portion of a turn or a full turn). For example, the arcuate base 142 may have a curved shape, an arcuate shape, or a C-shape when the auxiliary conduit 140 extends over only an arcuate portion (i.e., possibly not a full turn) of the raised outer circular wall 128. On the other hand, the arcuate base 142 may be annular or ring-shaped when the secondary conduit 140 extends over a full turn of the raised outer circular wall 128.

According to various embodiments, the arcuate base 142 may be a tab-like (or flange-like) member extending in a circumferential direction of the raised outer circular wall 128 over at least an arcuate portion of the raised outer circular wall 128. Thus, the arcuate base 142 may be a web-like structure extending radially from at least an arcuate portion of the raised outer circular wall 128. According to various embodiments, the arcuate base 142 of the auxiliary conduit 140 may lie in a plane parallel to the plane of the annular flange 134. According to various embodiments, the arcuate base 142 of the auxiliary conduit 140 may be offset from the annular flange in the second axial direction 129b along the central axis 129. According to various embodiments, the arcuate base 142 may be a continuous solid structure that is uninterrupted so as to be free of any gaps or holes.

According to various embodiments, the secondary conduit 140 may include an arcuate sidewall 144. According to various embodiments, an arcuate sidewall 144 may extend between the arcuate base 142 and a corresponding portion of the annular flange 134. Accordingly, the arcuate sidewall 144 may extend or curve arcuately along the arcuate base 142 and corresponding portions of the annular flange 134. Further, the arcuate sidewall 144 may interconnect the arcuate base 142 and a corresponding portion of the annular flange 134. Thus, the curvature of the arcuate sidewall 144 may align with the arcuate base 142 and corresponding portions of the annular flange 134. According to various embodiments, the arcuate sidewall 144 may be concentrically aligned with the convex outer circular wall 128 such that the arcuate sidewall 144 may be spaced radially outward from the convex outer circular wall 128. According to various embodiments, depending on whether the auxiliary conduit 140 extends over only an arcuate portion of the raised outer circular wall 128 or over a full turn of the raised outer circular wall 128, the arcuate sidewall 144 may extend along a corresponding portion (e.g., a portion of a turn or a full turn) of the arcuate base 142 and the annular flange 134, respectively. For example, the arcuate sidewall 144 may have a curved shape, an arcuate shape, or a C-shape when the auxiliary conduit 140 extends over only an arcuate portion (i.e., may not be a full turn) of the raised outer circular wall 128. On the other hand, the arcuate sidewall 144 may be annular or ring-shaped when the secondary conduit 140 extends over a full turn of the raised outer circular wall 128.

According to various embodiments, the arcuate sidewall 144 may interconnect an outer arcuate edge of the arcuate base 142 and a corresponding portion of an outer circumference of the annular flange 134. Accordingly, the arcuate sidewall 144 may extend or curve arcuately along the outer arcuate edge of the arcuate base 142 and a corresponding portion of the outer circumference of the annular flange 134. Thus, the curvature of the arcuate sidewall 144 may align with the outer arcuate edge of the arcuate base 142 and the corresponding portion of the outer circumference of the annular flange 134.

According to various embodiments, the raised outer circular wall 128, the arcuate sidewall 144, the arcuate base 142, and the corresponding portion of the annular flange 134 may define an auxiliary acoustic cavity 146 (or a second acoustic cavity) therein. According to various embodiments, the auxiliary acoustic cavity 146 may follow the arcuate shape of the arcuate sidewall 144 and the arcuate base 142 of the auxiliary duct 140. Thus, the auxiliary acoustic cavity may extend in a circumferential direction of the raised outer circular wall 128 alongside the outer surface 127 of at least the arcuate portion of the raised outer circular wall 128, and may extend below and along a corresponding portion of the annular flange 134. According to various embodiments, the auxiliary acoustic chamber 146 and the annular acoustic chamber 132 may be configured in a concentric manner, and thus, the auxiliary acoustic chamber 146 may form an outer chamber along the outside of the annular acoustic chamber 132.

According to various embodiments, both ends of the secondary conduit 140 may be closed when the secondary conduit 140 extends over only the arcuate portion of the raised outer circular wall 128. Thus, both ends of the secondary conduit 140 may be sealed with corresponding end walls 147 (see, e.g., fig. 2B, 3C, and 3D) or end plates or end caps.

According to various embodiments, the arcuate sidewall 144 of the auxiliary conduit 140 may include a plurality of side through holes 148. According to various embodiments, the plurality of side through holes 148 may be distributed along the arcuate sidewall 144 of the auxiliary conduit 140 in a circumferential direction. According to various embodiments, the plurality of side vias 148 may include two or three or four or five or six or more side vias 148. According to various embodiments, the plurality of side through-holes 148 may be dispersed or interspersed or ordered along the arcuate sidewall 144 so as to follow the curvature of the arcuate sidewall 144. According to various embodiments, the plurality of side through-holes 148 may be evenly distributed along the arcuate sidewall 144 of the auxiliary conduit 140. According to various embodiments, the plurality of side vias 148 may act as tuning conduits or holes.

According to various embodiments, each side through-hole 148 may extend through the arcuate sidewall 144 in a radial direction relative to the central axis 129. Accordingly, the plurality of side through-holes 148 may be radial holes distributed along the arcuate sidewall 144. Thus, the bore axis 149 (or centerline) of each side through bore 148 may be perpendicular to the central axis 129. According to various embodiments, each side through-hole 148 may be fabricated to pass completely through the arcuate sidewall 144 in a radial direction relative to the central axis 129 from an inner surface of the arcuate sidewall 144 to an outer surface of the arcuate sidewall 144.

According to various embodiments, sound may propagate into the auxiliary sound cavity 146 within the auxiliary tube 140 via the plurality of through holes 136 of the annular flange 134. The sound may bounce off the outer surface 127 of the raised outer circular wall 128 and/or the arcuate base 142. Subsequently, the sound may exit the auxiliary chamber 146 of the auxiliary conduit 140 via a plurality of side through-holes 148 along the arcuate sidewall 144 of the auxiliary conduit 140. According to various embodiments, by allowing sound to pass through the auxiliary sound cavity 146 before exiting the headphone driver 100, the sound pressure may be smoothed and the sound may be enhanced or improved. In particular, this may facilitate mid-frequency sound enhancement.

According to various embodiments, each through-hole 136 of the annular flange 134 may have a larger cross-sectional area than each side through-hole 148 of the arcuate sidewall 144 of the auxiliary conduit 140. Accordingly, the hole size (e.g., hole diameter, hole width, etc.) of each through hole 136 of the annular flange 134 may be greater than the hole size (e.g., hole diameter, hole width, etc.) of each side through hole 148 of the arcuate sidewall 144 of the auxiliary conduit 140.

According to various embodiments, each through-hole 136 of the annular flange 134 may serve as a top opening for accessing the auxiliary acoustic cavity 146 of the auxiliary duct 140, and each side through-hole 148 of the arcuate sidewall 144 may serve as a side opening for accessing the auxiliary acoustic cavity 146 of the auxiliary duct 140. According to various embodiments, the hole width of each through hole 136 of the annular flange 134 measured in a radial direction relative to the central axis 129 may be less than the width of the auxiliary acoustic cavity 146 measured in the same radial direction. According to various embodiments, the hole width of each side through hole 148 of the arcuate sidewall 144 measured in a direction parallel to the central axis 129 may be less than the height of the auxiliary acoustic cavity 146 measured in the same direction.

According to various embodiments, the headset driver 100 may include a permanent ring magnet 150. According to various embodiments, the permanent ring magnet 150 may be a ring-shaped permanent magnet having a central bore 152. According to various embodiments, the permanent ring magnet 150 may be disposed within the central cavity 130 of the circular base structure 120. Thus, the permanent ring magnet 150 may be surrounded or enclosed by the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120. According to various embodiments, the permanent ring magnet 150 may be disposed in and fit within the central cavity 130 defined by the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120. According to various embodiments, the geometric axis of the permanent ring magnet 150 may coincide with the central axis 129. According to various embodiments, the central bore 152 of the permanent ring magnet may serve as a heat dissipation outlet.

According to various embodiments, the headphone driver 100 may include a diaphragm 110. According to various embodiments, diaphragm 110 may be disposed on circular base structure 120. Thus, diaphragm 110 may be placed over or atop circular base structure 120. According to various embodiments, diaphragm 110 may cover upper surface 133 of annular flange 134, annular acoustic cavity 132 of annular trough portion 122, and permanent ring magnet 150. Thus, diaphragm 110 may extend over or rest on upper surface 133 of annular flange 134, annular acoustic chamber 132 of annular trough portion 122, and permanent annular magnet 150 to conceal or form a top cover over upper surface 133 of annular flange 134, annular acoustic chamber 132 of annular trough portion 122, and permanent annular magnet 150. According to various embodiments, diaphragm 110 may have a circular shape and peripheral edge 112 of diaphragm 110 may be coupled to peripheral edge portion 121 of circular base structure 120. According to various embodiments, the peripheral edge portion 121 of the circular base structure 120 may be along an outer circumference of the annular flange 134.

According to various embodiments, the headphone driver 100 may include a coil 160. According to various embodiments, the coil 160 may act as a voice coil or an electromagnetic actuator. According to various embodiments, coil 160 may be attached to central region 114 of diaphragm 110 with a first coil end (or upper coil end) of coil 160 abutting a lower surface of diaphragm 110 and a second coil end (or lower coil end) of coil 160 suspended in air. In one exemplary embodiment, the coil 160 has a larger diameter than the ring magnet 150. According to various embodiments, the coil 160 may be coaxially located and oriented on the diaphragm with respect to the annular flange 134, the annular groove portion 122, and the permanent annular magnet 150. Thus, the coil axis of the coil 160 may coincide with the central axis 129. According to various embodiments, coil 160 may be suspended by diaphragm 110 relative to permanent ring magnet 150 so as to be able to cooperate with permanent ring magnet 150 when an electric current is passed through coil 160. Thus, coil 160 may be suspended by diaphragm 110 in a suspended manner so as to be within the magnetic field of permanent ring magnet 150, such that permanent ring magnet 150 may have a magnetic influence on coil 160. Thus, when the coil 160 is energized by passing a current through the coil 160, the magnetic field generated by the coil 160 may interact with the magnetic field of the permanent ring magnet 150. According to various embodiments, the interaction between the magnetic fields may exert a force on diaphragm 110 to move diaphragm 110. According to various embodiments, a rapid change in the direction and magnitude of the current through coil 160 may cause diaphragm 110 to vibrate. Thus, coil 160 may cooperate with permanent ring magnet 150 to vibrate diaphragm 110 when an electric current is passed through coil 160.

According to various embodiments, during operation, sound may be generated by the vibration of diaphragm 110. Sound may enter the annular acoustic chamber 132 (or first acoustic chamber) within the annular groove portion 122 of the circular base structure 120 and bounce off of one or a combination of the continuous uninterrupted annular floor 124, the raised inner circular wall 126, and the raised outer circular wall 128 of the annular groove portion 122. Subsequently, the sound may enter the auxiliary sound cavity 146 (or second sound cavity) within the auxiliary conduit 140 via the plurality of through holes 136 of the annular flange 134. The sound may bounce off the outer surface 127 of the raised outer circular wall 128 and/or the arcuate base 142 and then exit the auxiliary chamber 146 of the auxiliary conduit 140 via a plurality of side through-holes 148 along the arcuate sidewall 144 of the auxiliary conduit 140. According to various embodiments, sound may be enhanced or improved by allowing sound to propagate through the annular acoustic cavity 132 (or first acoustic cavity) and then through the auxiliary acoustic cavity 146 (or second acoustic cavity) before exiting the headphone driver 100 radially through the plurality of side through-holes 148 along the arcuate sidewall 144 of the auxiliary conduit 140.

Fig. 2A illustrates a cross-sectional view of a headphone driver 200 according to various embodiments. Fig. 2B illustrates an exploded view of the headphone driver 200 of fig. 2A, in accordance with various embodiments. Fig. 2C illustrates an assembly diagram of the headset driver 200 of fig. 2B. The headphone driver 200 of fig. 2A, 2B, and 2C includes all of the features of the headphone driver 100 of fig. 1A-1C, according to various embodiments. Accordingly, all of the features, changes, modifications and variations applicable to the headphone driver 100 of fig. 1A to 1C are also applicable to the headphone driver 200 of fig. 2A, 2B and 2C.

According to various embodiments, similar to the headset driver 100 of fig. 1A-1C, the headset driver 200 may include a circular base structure 120 having a central axis 129, wherein the circular base structure 120 may include an annular groove portion 122, an annular flange 134, and an auxiliary conduit 140. Further, similar to the earphone driver 100 of fig. 1A to 1C, the earphone driver 200 may include a permanent ring magnet 150, a diaphragm 110, and a coil 160.

According to various embodiments, in headphone driver 200, similar to headphone driver 100 of fig. 1A-1C, annular groove portion 122 may include a continuous uninterrupted annular bottom surface 124. Similar to the headphone driver 100 of fig. 1A-1C, the annular groove portion 122 can include a raised inner circular wall 126, the raised inner circular wall 126 protruding from the continuous uninterrupted annular bottom surface 124 along the inner circumference 123 of the continuous uninterrupted annular bottom surface 124 and in the first axial direction 129a. Similar to the headphone driver 100 of fig. 1A-1C, the annular groove portion 122 can include a raised outer circular wall 128, the raised outer circular wall 128 protruding from the continuous uninterrupted annular floor 124 along the outer circumference 125 of the continuous uninterrupted annular floor 124 and in the first axial direction 129a. Similar to the headphone driver 100 of fig. 1A-1C, the continuous uninterrupted annular floor 124, the raised inner circular wall 126, and the raised outer circular wall 128 can define an annular acoustic cavity 132. Further, the raised inner circular wall 126 may define a central cavity 130 therein.

According to various embodiments, in the headphone driver 200, similar to the headphone driver 100 of fig. 1A-1C, the annular flange 134 may extend radially outward from the raised outer circular wall 128 relative to the central axis 129. Similar to the headphone driver 100 of fig. 1A-1C, the annular flange 134 can have a plurality of through-holes 136, the plurality of through-holes 136 extending between an upper surface 133 facing in a first axial direction 129a and a lower surface facing in a second axial direction 129b opposite the first axial direction 129a.

According to various embodiments, in the headphone driver 200, similar to the headphone driver 100 of fig. 1A-1C, the auxiliary conduit 140 extends alongside the outer surface 127 of at least the arcuate portion of the raised outer circular wall 128 in the circumferential direction thereof and along the lower surface 135 of the corresponding portion of the annular flange 134. Similar to the headphone driver 100 of fig. 1A to 1C, the auxiliary conduit 140 includes: an arcuate base 142, the arcuate base 142 abutting the convex outer circular wall 128; and an arcuate sidewall 144, the arcuate sidewall 144 extending between the arcuate base 142 and a corresponding portion of the annular flange 134 so as to define an auxiliary acoustic cavity 146 between the raised outer circular wall 128, the arcuate sidewall 144, the arcuate base 142, and the corresponding portion of the annular flange 134. Similar to the headphone driver 100 of fig. 1A-1C, the arcuate sidewall 144 may include a plurality of side through holes 148.

According to various embodiments, in the headset driver 200, similar to the headset driver 100 of fig. 1A-1C, the permanent ring magnet 150 may be disposed within the central cavity 130 defined by the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120.

According to various embodiments, in earphone driver 200, similar to earphone driver 100 of fig. 1A-1C, diaphragm 110 may be disposed on circular base structure 120 so as to overlie upper surface 133 of annular flange 134, annular acoustic cavity 132 of annular groove portion 122, and permanent annular magnet 150.

According to various embodiments, in earphone driver 200, similar to earphone driver 100 of fig. 1A-1C, coil 160 may be attached to central region 114 of diaphragm 110 and suspended relative to permanent ring magnet 150 so as to be able to cooperate with permanent ring magnet 150 to vibrate diaphragm 110 when current passes through coil 160.

According to various embodiments, the headphone driver 200 of fig. 2A, 2B may further include the following additional features and/or limitations.

According to various embodiments, the headphone driver 200 may further include a circular base tray 270. According to various embodiments, the circular base tray 270 may fit within the central cavity 130 of the circular base structure 120 of the headphone driver 200. Thus, the circular base tray 270 may be inserted into the central cavity 130 for attachment to the circular base structure 120. According to various embodiments, the circular base tray 270 may include a circular bottom surface 272 and an outer circular wall 274 extending upwardly from a circumference 273 of the circular bottom surface 272. Thus, the outer circular wall 274 of the circular base tray 270 may be a single wall structure that forms a closed circle. Thus, the outer circular wall 274 may be a hollow cylindrical wall structure. Further, an outer circular wall 274 of the circular base tray 270 may extend perpendicularly from the circular bottom surface 272 of the circular base tray 270.

According to various embodiments, the circular base tray 270 may fit within the central cavity 130 of the circular base structure 120 such that the outer circular wall 274 of the circular base tray 270 may extend upward from the circumference 273 of the circular bottom surface 272 of the circular base tray 270 in the first axial direction 129a along the central axis 129. Thus, the circular base tray 270 may fit within the central cavity 130 of the circular base structure 120 such that the circular base tray 270 is oriented with the circular bottom surface 272 of the circular base tray 270 facing or facing in the same direction as the continuous uninterrupted annular bottom surface 124 of the circular base structure 120. Further, the outer circular wall 274 may be concentric with the raised inner circular wall 126 and the raised outer circular wall 128 of the annular groove portion 122 of the circular base structure 120.

According to various embodiments, the circular base tray 270 may include a through hole 276 at the center of the circular bottom surface 272. According to various embodiments, the through-holes 276 of the circular base tray 270 may extend perpendicularly from the circular bottom surface 272 and through the base portion of the circular base tray 270. Thus, the through-hole 276 may have a hole axis (or centerline) that is perpendicular to the circular bottom surface 272. According to various embodiments, the aperture axis of the through-aperture 276 of the circular base tray 270 may coincide with the central axis 129 of the circular base structure 120 when the circular base tray 270 is fitted in the central cavity 130 of the circular base structure 120.

According to various embodiments, the circular base tray 270 may fit within the central cavity 130 of the circular base structure 120 such that the circular bottom surface 272 may be offset from the continuous uninterrupted annular bottom surface 124 of the circular base structure 120 along the central axis 129. Thus, the circular base tray 270 may be configured such that when fitted in the central cavity 130 of the circular base structure 120, the circular bottom surface 272 of the circular base tray 270 may be at a different level or in a different plane relative to the continuous uninterrupted annular bottom surface 124 of the circular base structure 120. For example, the circular bottom surface 272 of the circular base tray 270 may be offset from the continuous uninterrupted annular bottom surface 124 of the circular base structure 120 in the first axial direction 129a along the central axis 129.

According to various other embodiments, the circular base tray 270 may fit within the central cavity 130 of the circular base structure 120 such that the circular bottom surface 272 may lie in the same plane as the continuous uninterrupted annular bottom surface 124 of the circular base structure 120. Thus, the circular base tray 270 may be configured such that when fitted in the central cavity 130 of the circular base structure 120, the circular bottom surface 272 of the circular base tray 270 may be aligned with the continuous uninterrupted annular bottom surface 124 of the circular base structure 120 so as to be at the same level or in the same plane.

According to various embodiments, when the circular base tray 270 is fitted in the central cavity 130 of the circular base structure 120, the outer circular wall 274 of the circular base tray 270 may extend alongside the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120, thereby being tightly surrounded by the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120. Thus, the outer cylindrical surface 275 of the outer circular wall 274 of the circular base tray 270 may fully contact and abut the inner cylindrical surface 126a of the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120, such that the assembled circular base tray 270 and circular base structure 120 are free of any gap between the outer circular wall 274 of the circular base tray 270 and the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120.

According to various embodiments, the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120 may include an inwardly projecting rim 248. Accordingly, the inwardly projecting rim 248 may project perpendicularly and radially inwardly from the tip (or upper edge or rim) of the raised inner circular wall 126 toward the central axis 129. According to various embodiments, the inwardly projecting edge 248 of the raised inner circular wall 126 may act as a mechanical stop for limiting the amount of insertion when inserting the circular base tray 270 into the central cavity 130 of the circular base structure 120. Furthermore, the inwardly projecting edges 248 may also be used to define a predetermined relative position in which the circular base tray 270 will fit relative to the circular base structure 120.

According to various embodiments, the permanent ring magnet 150 may be placed on the circular bottom surface 272 of the circular base tray 270 with the central aperture 152 of the permanent ring magnet 150 aligned with the through-hole 276 at the center of the circular bottom surface 272. According to various embodiments, when the permanent ring magnet 150 is placed on the circular bottom surface 272 of the circular base tray 270, the permanent magnet 150 may be within or inside the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120. According to various embodiments, with the central bore 152 of the permanent ring magnet 150 aligned with the through bore 276 of the circular bottom surface 272, the permanent ring magnet 150 may be coaxial with the circular base structure 120, and thus, the geometric axis of the permanent ring magnet 150 may coincide with the central axis 129. According to various embodiments, the central bore 152 of the aligned permanent ring magnet 150 and the through-hole 276 of the circular bottom surface 272 may act as heat dissipation vents.

According to various embodiments, the circular base tray 270 may be made of metal or a magnetizable material (such as steel). According to various embodiments, when the permanent ring magnet 150 touches or contacts the circular substrate tray 270, magnetism may be induced in the circular substrate tray 270 such that the circular substrate tray 270 becomes a magnet. According to various embodiments, the permanent ring magnet 150 may have a diameter that is less than the diameter of the circular bottom surface 272 of the circular base tray 270. According to various embodiments, when the permanent ring magnet 150 is placed on the circular bottom surface 272, a circumferential gap 254 may be formed between the permanent ring magnet 150 and the outer circular wall 274 of the circular base tray 270. Thus, the bottom surface 156 of the permanent ring magnet 150 may contact the circular bottom surface 272. However, the outer cylindrical surface 158 of the permanent ring magnet 150 may not have any contact with the outer circular wall 274 of the circular base tray 270.

According to various embodiments, coil 160 on diaphragm 110 may be configured and shaped so as to be suspended within circumferential gap 254 between permanent ring magnet 150 and outer circular wall 274 of circular base tray 270.

According to various embodiments, the headset driver 200 may further include a circular plate 280 having a central aperture 282. According to various embodiments, the circular plate 280 may be placed on the permanent magnet 150 and the permanent magnet 150 may be on the circular bottom surface 272 of the circular base tray 270. According to various embodiments, the central aperture 282 of the circular plate 280 may be aligned with the central aperture 152 of the permanent ring magnet 150 and the through-hole 276 at the center of the circular bottom surface 272. According to various embodiments, when the circular plate 280 is placed on the permanent magnet 150, the circular plate 280 may be within or inside the raised inner circular wall 126 of the annular groove portion 122 of the circular base structure 120. According to various embodiments, with the central aperture 282 of the circular plate 280 aligned with the central aperture 152 of the permanent ring magnet 150 and the through-hole 276 of the circular bottom surface 272, the circular plate 280 may be coaxial with the circular base structure 120, and thus, the geometric axis of the circular plate 280 may coincide with the central axis 129. According to various embodiments, the aligned central hole 282 of the circular plate 280, the central hole 152 of the permanent ring magnet 150, and the through hole 276 of the circular bottom surface 272 may serve as heat dissipation outlets.

According to various embodiments, the circular plate 280 may be made of metal or a magnetizable material (such as steel). According to various embodiments, when the circular plate 280 touches or contacts the permanent magnet 150, magnetism may be induced in the circular plate 280 such that the circular plate 280 becomes a magnet. According to various embodiments, the circular plate 280 may have a diameter equal to or less than the diameter of the permanent magnet 150. According to various embodiments, when the circular plate 280 is placed on the permanent magnets 150, the circumferential gap 254 between the permanent ring magnets 150 and the outer circular wall 274 of the circular base tray 270 may expand between the circular plate 280 and the outer circular wall 274 of the circular base tray 270. Thus, the circular plate 280 may not have any contact with the outer circular wall 274 of the circular base tray 270. According to various embodiments, coil 160 on diaphragm 110 may be configured and shaped so as to be suspended within circumferential gap 254 between circular plate 280 and outer circular wall 274 of circular base tray 270.

According to various embodiments, the circular base structure 120 may be integrally molded or printed or formed or cast as a single unitary piece.

According to various embodiments, the circular base structure 120 may also be a plurality of separate pieces that may be integrally joined or coupled or connected together as a single integral unit. According to various embodiments, for example, the circular base structure 120 may include a first portion 120a and a second portion 120b that may be integrally joined or coupled or connected together to form the circular base structure 120 as a single integral unit. Fig. 3A illustrates a bottom perspective view of a first portion 120a of a circular base structure 120, in accordance with various embodiments. Fig. 3B illustrates a top view of the first portion 120a of the circular base structure 120, in accordance with various embodiments. Fig. 3C illustrates a top perspective view of the second portion 120b of the circular base structure 120, in accordance with various embodiments. Fig. 3D illustrates a top view of the second portion 120b of the circular base structure 120, in accordance with various embodiments.

According to various embodiments, the first portion 120a of the circular base structure 120 may include an annular groove portion 122 and an annular flange 134. According to various embodiments, the second portion 120b of the circular base structure 120 may include an auxiliary conduit 140, the auxiliary conduit 140 having an arcuate base 142 and an arcuate sidewall 144.

The following examples relate to various embodiments.

Example 1 is a headphone driver, comprising:

a circular base structure having a central axis extending vertically therethrough, the circular base structure comprising

An annular groove portion having a geometric center located at a central axis, the annular groove portion having: a continuous uninterrupted annular bottom surface; a raised inner circular wall along an inner circumference of the continuous uninterrupted annular bottom surface and protruding from the continuous uninterrupted annular bottom surface in a first axial direction; and a raised outer circular wall along an outer circumference of and protruding from the continuous uninterrupted annular floor in the first axial direction, wherein the continuous uninterrupted annular floor, the raised inner circular wall and the raised outer circular wall define an annular acoustic cavity,

an annular flange extending radially outward from the raised outer circular wall relative to the central axis, the annular flange having a plurality of through-holes extending between an upper surface facing in the first axial direction and a lower surface facing in a second axial direction opposite the first axial direction, and

an auxiliary duct extending alongside the outer surface of at least the arc-shaped portion of the raised outer circular wall in the circumferential direction thereof and along the lower surface of the corresponding portion of the annular flange, said auxiliary duct

The track comprises

An arcuate base abutting the raised outer circular wall, and an arcuate sidewall extending between the arcuate base and a corresponding portion of the annular flange so as to define an auxiliary acoustic cavity between the raised outer circular wall, the arcuate sidewall, the arcuate base and the corresponding portion of the annular flange,

wherein the arcuate sidewall includes a plurality of side through-holes;

a permanent ring magnet disposed within a central cavity defined by the raised inner circular wall of the annular groove portion;

a diaphragm disposed on the circular base structure so as to cover an upper surface of the annular flange, the annular acoustic cavity of the annular groove portion, and the permanent ring magnet; and

a coil attached to the central region of the diaphragm and suspended relative to the permanent ring magnet so as to be able to co-act with the permanent ring magnet to vibrate the diaphragm when current is passed through the coil.

In example 2, the subject matter of example 1 can optionally include: the auxiliary conduit may extend at least 270 ° around the central axis.

In example 3, the subject matter of example 1 or 2 can optionally include: the secondary duct may extend alongside the arcuate portion of the raised outer circular wall without completing a full turn on the raised outer circular wall and both ends of the secondary duct may be closed.

In example 4, the subject matter of any of examples 1 to 3 can optionally include a circular base tray that fits within a central cavity defined by the raised inner circular wall of the annular groove portion,

wherein the circular base tray has an outer circular wall extending in a first axial direction upwardly from a circumference of a circular bottom surface of the circular base tray, and

wherein the circular base tray comprises a through hole at the center of the circular bottom surface, the through hole having a hole axis parallel to the central axis.

In example 5, the subject matter of example 4 can optionally include: the outer circular wall of the circular base tray may extend alongside the inner circular wall of the protrusion of the annular groove portion of the circular base structure so as to be closely surrounded by the inner circular wall of the protrusion.

In example 6, the subject matter of example 4 or 5 can optionally include: the permanent ring magnet may be placed on the circular bottom surface of the circular base tray with the central hole of the permanent ring magnet aligned with the through hole at the center of the circular bottom surface.

In example 7, the subject matter of any of examples 1 to 6 can optionally include: each through hole of the annular flange may have a cross-sectional area greater than a cross-sectional area of each side through hole of the arcuate sidewall of the auxiliary duct.

In example 8, the subject matter of any of examples 1 to 7 can optionally include: the plurality of side through holes may be evenly distributed along the arcuate sidewall of the auxiliary duct.

Various embodiments have provided headphone drivers that can produce sound with better sound quality for headphones. Various embodiments have provided for enhancing the quality of mid-range (or mid-range) and/or mid-low range (or mid-low range) sound. Various embodiments have provided drivers that can produce brighter and more clear low, mid, and high frequency sounds. Various embodiments have also provided headphones comprising a headphone driver according to various embodiments.

While the invention has been particularly shown and described with reference to specific embodiments, it will be understood by those skilled in the art that various changes, modifications and variations in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims. The scope of the invention is indicated by the appended claims, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A headphone driver, characterized in that the headphone driver comprises:

a circular base structure having a central axis extending vertically therethrough, the circular base structure comprising:

an annular groove portion having a geometric center located at the central axis, the annular groove portion having: a continuous uninterrupted annular bottom surface; a raised inner circular wall along an inner circumference of the continuous uninterrupted annular bottom surface and protruding from the continuous uninterrupted annular bottom surface in a first axial direction; and a raised outer circular wall along an outer circumference of and protruding from the continuous uninterrupted annular floor in the first axial direction, wherein the continuous uninterrupted annular floor, the raised inner circular wall and the raised outer circular wall define an annular acoustic cavity,

an auxiliary duct extending alongside an outer surface of at least an arcuate portion of the raised outer circular wall in a circumferential direction thereof and along the lower surface of a corresponding portion of the annular flange, the auxiliary duct comprising:

an arcuate base abutting the convex outer circular wall, and

an arcuate sidewall extending between the arcuate base and the corresponding portion of the annular flange so as to define an auxiliary acoustic cavity between the convex outer circular wall, the arcuate sidewall, the arcuate base, and the corresponding portion of the annular flange,

wherein the arcuate sidewall comprises a plurality of side vias;

a diaphragm disposed on said circular base structure so as to overlie said upper surface of said annular flange, said annular acoustic cavity of said annular channel portion and said permanent annular magnet; and

a coil attached to a central region of the diaphragm and suspended relative to the permanent ring magnet so as to be able to co-act with the permanent ring magnet to vibrate the diaphragm when an electric current is passed through the coil.

2. The headphone driver of claim 1 wherein the auxiliary conduit extends alongside the arcuate portion of the raised outer circular wall without completing a full revolution of the extension on the raised outer circular wall, and wherein both ends of the auxiliary conduit are closed.

3. The headphone driver of claim 2 wherein the auxiliary conduit extends at least 270 ° around the central axis.

4. The headphone driver of any of claims 1-3 further comprising a circular base tray that fits in the central cavity defined by the raised inner circular wall of the annular groove portion,

wherein the circular base tray has an outer circular wall extending upwardly in the first axial direction from an outer circumference of a circular bottom surface of the circular base tray,

wherein the circular base tray comprises a through hole at the center of the circular bottom surface, the through hole having a hole axis coinciding with the central axis,

wherein the outer circular wall of the circular base tray extends alongside the raised inner circular wall of the annular trough portion of the circular base structure so as to be closely surrounded by the raised inner circular wall.

5. The headphone driver of claim 4 wherein the permanent ring magnet is disposed on the circular bottom surface of the circular base tray, the central aperture of the permanent ring magnet being aligned with the through-hole at the center of the circular bottom surface.

6. The headphone driver according to any one of claims 1 to 3, wherein each through hole of the annular flange has a larger cross-sectional area than each side through hole of the arcuate side wall of the auxiliary duct.

7. The headphone driver of any of claims 1-3, wherein the plurality of side through-holes are evenly distributed along the arcuate side wall of the auxiliary conduit.