Annular dual-suspension quad-magnet planar magnetic driver for in-ear headphone

Abstract

The present application belongs to the technical field of electroacoustic transducers for headphones. Provided is an annular dual-suspension quad-magnet planar magnetic driver for an in-ear headphone. The annular dual-suspension quad-magnet planar magnetic driver comprises an upper driver cap, an upper driver magnetic circuit, a rigid thin piece, a dual-suspension diaphragm, an electrically conductive voice coil, an annular bracket, a lower driver magnetic circuit, a pole plate and a lower driver cap, wherein the upper driver cap, the upper driver magnetic circuit, the rigid thin piece, the dual-suspension diaphragm, the electrically conductive voice coil, the annular bracket, the lower driver magnetic circuit and the pole plate are sequentially stacked and assembled together. The present application has the advantages of small size, high sensitivity and high output sound pressure level.

Description

A ring-shaped double-suspended quad-magnetic flat unit for in-ear headphones Technical Field

[0001] The utility model belongs to the technical field of earphone electroacoustic transducers, in particular to an annular double-suspended edge four-magnetic flat plate unit for in-ear earphones. Background Art

[0002] In-ear headphones are headphones that are used inside the human auditory organ and are designed to seal the user's ear canal when in use.

[0003] At present, most in-ear planar unit diaphragms use an etching circuit process. However, the etching process will cause the circuit trace thickness to be thinner, making its conductor cross-sectional area relatively small, which will cause the problem of excessively high overall line impedance. In order to avoid the problem of excessively high impedance, the circuit stroke is moderately shortened, but this inevitably reduces the sensitivity of the unit. Therefore, a larger driving force is required to drive. To solve this problem, they usually need to rely on external amplifiers, but this increases their size to a certain extent and reduces their portability. In addition, because the diaphragm of the traditional planar in-ear headphone unit is too tight, its resonant frequency is high and the bass sensitivity is low. Considering the requirement of noise-canceling headphones for bass response characteristics, this makes the traditional planar in-ear headphone unit unsuitable for use in noise-canceling headphones.

[0004] Therefore, it is necessary to design a planar magnetic electroacoustic transducer unit with higher sensitivity, lower resonant frequency, lower distortion, smaller and thinner size, so that it is more suitable for small in-ear headphones.

[0005] Utility Model Content

[0006] In response to the technical problems existing in the background technology, the utility model provides a ring-shaped double-cantilever four-magnetic flat-plate unit for in-ear headphones, which can realize a planar magnetic electroacoustic transducer unit with higher sensitivity, lower resonant frequency, lower distortion, smaller and thinner size, and is more suitable for in-ear headphones.

[0007] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0008] An annular double-suspended edge four-magnetic flat-plate unit for an in-ear headphone comprises a unit upper cover, a unit upper magnetic circuit, a rigid sheet, a double-suspended edge diaphragm, a conductive voice coil, an annular bracket, a unit lower magnetic circuit, a magnetic conductive plate and a unit lower cover;

[0009] The unit upper cover, the unit upper magnetic circuit, the rigid sheet, the double-suspension diaphragm, the conductive voice coil, the annular bracket, the unit lower magnetic circuit and the magnetic conductive plate are stacked and assembled together in this order.

[0010] Preferably, the double-edge diaphragm is provided with an inner ring rim and an outer ring rim, and both the inner ring rim and the outer ring rim face toward the rigid sheet.

[0011] Preferably, the rigid sheet is made of a non-magnetic material.

[0012] Preferably, the material of the double-cantilever diaphragm includes PU diaphragm.

[0013] Preferably, the unit upper cover is made of brass.

[0014] Preferably, the annular bracket is made of brass.

[0015] Preferably, the unit lower cover is made of brass.

[0016] Preferably, the conductive voice coil is a conductive voice coil with a ring-shaped flat structure, specifically a long strip of ultra-fine enameled wire spirally wound into a ring shape.

[0017] The utility model has the following advantages and beneficial effects:

[0018] The utility model adopts a double-suspended diaphragm and a rigid thin sheet covering the diaphragm, which effectively reduces the split vibration of the unit;

[0019] The utility model solves the problem of insufficient sensitivity caused by the relatively short circuit stroke of traditional in-ear flat-panel units;

[0020] The utility model improves the overall conversion efficiency and output level by introducing a circular magnetic circuit that is symmetrical up and down and a circular magnetic conductive plate at the bottom;

[0021] The planar magnetic electroacoustic transducer unit of the utility model has higher sensitivity, lower resonance frequency, lower distortion, smaller and thinner size, is easy to be applied to in-ear headphones, and has strong applicability in in-ear headphones. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the exploded structure of a 13 mm annular double-hanging edge four-magnetic flat plate unit provided by the present invention;

[0023] Figure 2 is a schematic diagram of the magnetic pole of the present invention;

[0024] FIG3 is a schematic structural diagram of a conductive voice coil provided in Example 4 of the present utility model;

[0025] Icon: 101-unit upper cover, 102-unit upper magnetic circuit, 103-rigid sheet, 104-double suspension diaphragm, 105-conductive voice coil, 106-ring bracket, 107-unit lower magnetic circuit, 108-magnetic plate, 109-unit lower cover. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0028] Example 1

[0029] This embodiment provides an annular double-suspended quad-magnetic flat-plate unit for an in-ear headphone. Referring to FIG1 , the unit comprises a unit upper cover 101 , a unit upper magnetic circuit 102 , a rigid sheet 103 , a double-suspended diaphragm 104 , a conductive voice coil 105 , an annular support 106 , a unit lower magnetic circuit 107 , a magnetic conductive plate 108 , and a unit lower cover 109 .

[0030] The unit upper cover 101 , the unit upper magnetic circuit 102 , the rigid sheet 103 , the double suspension diaphragm 104 , the conductive voice coil 105 , the annular bracket 106 , the unit lower magnetic circuit 107 and the magnetic conductive plate 108 are stacked and assembled in this order.

[0031] This utility model utilizes a dual-suspended diaphragm 104 incorporated into the driver design. This design is primarily due to the fact that increasing the distance between the driver's suspensions increases the wavelength of the split vibration, which in turn leads to a lower split vibration frequency, affecting the driver's high-frequency ductility and frequency response smoothness. The dual-suspended design effectively reduces the distance between the suspension points, significantly reducing the driver's split vibration, making the force applied to the driver more uniform during movement and reducing nonlinear distortion. Furthermore, the dual-suspended design also stabilizes vibration even with large bass amplitudes and prevents distortion under high sound pressure.

[0032] Furthermore, the overall magnetic circuit of this invention utilizes a vertically symmetrical annular magnetic circuit design. This design not only enhances the magnetic flux density on the voice coil but also improves overall conversion efficiency and output. To further enhance efficiency, this embodiment incorporates a circular magnetic conductive plate 108 at the bottom of the magnetic circuit, comprehensively optimizing the performance of the entire system. See Figure 2 for a schematic diagram of the magnetic poles of this invention.

[0033] In terms of size, based on the structural design of this embodiment, the final thickness of the entire structure can be controlled at around 3.1 mm.

[0034] Therefore, this embodiment maintains higher performance while having a compact structure, and is more suitable for compact in-ear headphones.

[0035] Example 2

[0036] This embodiment is based on the technical solution of the first embodiment, and mainly further explains the relevant parts of the double-cantilever diaphragm 104 .

[0037] In this embodiment, the double-edge diaphragm 104 is provided with an inner ring edge and an outer ring edge, and both the inner ring edge and the outer ring edge face the rigid sheet 103 .

[0038] Furthermore, the material of the double-cantilever diaphragm 104 includes a PU diaphragm.

[0039] As a preferred solution of this embodiment, the rigid sheet 103 is made of a non-magnetic conductive material.

[0040] This embodiment further adds a rigid sheet 103 made of non-magnetic material to cover the diaphragm. The covering of the rigid sheet 103 can make the diaphragm bear the force more evenly, thereby further suppressing the occurrence of split vibration.

[0041] Example 3

[0042] This embodiment is based on the technical solution of Embodiment 1, and mainly further explains the material selection of the unit upper cover 101 and the like.

[0043] In this embodiment, the unit cover 101 is made of brass.

[0044] As a preferred solution, the annular bracket 106 is made of brass.

[0045] On the other hand, the unit lower cover 109 is made of brass.

[0046] The unit upper cover 101 at the top, the unit lower cover 109 at the bottom, and the annular bracket 106 of the diaphragm of the unit of the present invention are preferably made of non-magnetic brass alloy by stamping to eliminate the occurrence of magnetic leakage in the non-magnetic circuit part that may be caused by the use of magnetic conductive materials such as soft iron or nickel.

[0047] Example 4

[0048] This embodiment is based on the technical solution of Embodiment 1, and mainly further explains the conductive voice coil 105 .

[0049] As a preferred solution of this embodiment, referring to FIG3 , the conductive voice coil 105 is a conductive voice coil 105 with a ring-shaped flat structure, specifically a long strip of extra-fine enameled wire spirally wound into a ring shape.

[0050] The voice coil used in this embodiment is a circular flat conductive voice coil 105. This design uses the coil process used on wireless charging pads to replace the traditional circuit etching process. This not only ensures sufficient length of the unit's overall circuit, but also ensures low impedance.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A circular double-suspended quad-magnetic flat unit for in-ear headphones, characterized in that : comprising a unit upper cover (101), a unit upper magnetic circuit (102), a rigid sheet (103), a double suspension diaphragm (104), a conductive voice coil (105), an annular bracket (106), a unit lower magnetic circuit (107), a magnetic conductive plate (108) and a unit lower cover (109); The unit upper cover (101), the unit upper magnetic circuit (102), the rigid sheet (103), the double suspension diaphragm (104), the conductive voice coil (105), the annular support (106), the unit lower magnetic circuit (107) and the magnetic conductive plate (108) are stacked and assembled in sequence.

2. The annular double-cantilevered four-magnetic flat unit for in-ear headphones according to claim 1, characterized in that: The double-suspended-edge diaphragm (104) is provided with an inner circle folded-edge and an outer circle folded-edge, and both the inner circle folded-edge and the outer circle folded-edge are oriented toward the rigid sheet (103).

3. The annular double-cantilevered four-magnetic flat unit for in-ear headphones according to claim 2, characterized in that: The material of the double suspension diaphragm (104) includes a PU diaphragm.

4. The annular double-cantilevered four-magnetic flat unit for in-ear headphones according to claim 1, characterized in that: The rigid sheet (103) is made of a non-magnetic material.

5. The annular double-cantilevered four-magnetic flat unit for in-ear headphones according to claim 1, characterized in that: The unit upper cover (101) is made of brass.

6. The annular double-cantilevered four-magnetic flat unit for in-ear headphones according to claim 5, characterized in that: The annular support (106) is made of brass.

7. The annular double-cantilevered four-magnetic flat unit for in-ear headphones according to claim 6, characterized in that: The unit lower cover (109) is made of brass.

8. The annular double-cantilevered four-magnetic flat unit for in-ear headphones according to claim 1, characterized in that: The conductive voice coil (105) is a conductive voice coil (105) with a ring-shaped flat structure, specifically a long strip of ultra-fine enameled wire spiraled into a ring shape.

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