A flat full-range loudspeaker and earphone

Abstract

This utility model discloses a planar full-range speaker and earphone, including a cover and a housing, with a mounting cavity formed between the cover and the housing, and a sound-generating component inside the mounting cavity. The cover includes a first annular portion and a second annular portion, with a first through groove on the side of the second annular portion. The housing has a second through groove on the side corresponding to the first through groove. A PCB board is disposed at the bottom of the housing, and the PCB board is electrically connected to the sound-generating component via a cable passing through the first through groove and the second through groove. The sound-generating component is disposed within the cover and the housing, with the cover and the housing respectively having the first through groove and the second through groove. The PCB board is disposed at the bottom of the housing, and the cable connects the PCB board and the sound-generating component through the first through groove and the second through groove. Compared to placing the PCB board on the side, it does not require additional vertical height or horizontal width. While maintaining high sensitivity, it can be installed in various earphone housings without requiring additional earphone housing design for the speaker.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to a planar full-range loudspeaker and headphones. Background Technology

[0002] Speakers come in three types: dynamic, balanced armature, and planar full-range. Planar full-range speakers offer better sound quality compared to dynamic and balanced armature speakers. Currently, planar full-range speakers typically consist of a housing containing the sound-generating components, including a voice coil. The voice coil is electrically connected to an external PCB board, usually located on the side of the housing. This placement increases the speaker's width and height, requiring additional design considerations for the headphone housing when mounted, thus increasing design costs. Utility Model Content

[0003] Based on the above, the purpose of this utility model is to provide a planar full-range speaker and earphone that, while having high sensitivity, can be installed in various earphone housings without requiring additional earphone housing design for the speaker.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] On the one hand, a planar full-range loudspeaker is provided, including a cover and a housing, wherein a mounting cavity is formed between the cover and the housing, and a sound-generating component is disposed in the mounting cavity;

[0006] The cover includes a first annular portion and a second annular portion. The first annular portion is located below the second annular portion. A first through groove is provided on the side of the second annular portion. A second through groove corresponding to the first through groove is provided on the side of the housing. A PCB board is provided at the bottom of the housing. The PCB board is electrically connected to the sound-generating component through a cable. The cable passes through the first through groove and the second through groove.

[0007] Furthermore, a third through slot is provided on the outer periphery of the PCB board, and the third through slot is located below the second through slot.

[0008] Furthermore, the housing is fitted into the inner cavity of the second annular portion, the bottom of the second annular portion completely covers the bottom of the housing, and the bottom of the second annular portion is attached to the side of the PCB board.

[0009] Furthermore, the sound-generating component includes a diaphragm assembly, a voice coil, a first magnet, and a second magnet;

[0010] The voice coil is connected below the diaphragm assembly, which includes a diaphragm and a copper ring;

[0011] The first magnet is located above the diaphragm assembly and is installed in the inner cavity of the second annular portion. The first magnet includes a first inner magnet and a first outer magnet, with the first inner magnet sleeved in the central groove of the first outer magnet.

[0012] The second magnet is located below the voice coil and is installed in the inner cavity of the housing. The second magnet includes a second inner magnet and a second outer magnet, with the second inner magnet sleeved in the central groove of the second outer magnet.

[0013] Furthermore, an annular step is formed between the inner sides of the first annular portion and the second annular portion, and the copper ring is connected between the annular step and the top of the housing.

[0014] Furthermore, the distance between the diaphragm and the first magnet is 0.5 mm to 0.7 mm.

[0015] Furthermore, the cover has a sound outlet with a diameter of 2.5mm to 3.0mm.

[0016] Furthermore, the height of the voice coil is 0.2 mm to 0.3 mm.

[0017] Furthermore, the thickness of the first magnet is 0.5 mm to 0.8 mm;

[0018] And / or, the thickness of the second magnet is 2.5 mm to 2.8 mm.

[0019] Furthermore, the distance between the voice coil and the second magnet is 0.4 mm to 0.6 mm;

[0020] And / or, the diameter of the second inner magnet is 1.8 mm to 2.2 mm.

[0021] Furthermore, the thickness of the diaphragm is 5 μm to 7 μm;

[0022] And / or, the diameter of the diaphragm is 8.6 mm to 8.9 mm.

[0023] On the other hand, an earphone is provided, including the planar full-range speaker described above.

[0024] The beneficial effects of this utility model are as follows:

[0025] This utility model provides a planar full-range speaker and earphones. The sound-generating component is disposed within a cover and a housing. The cover and housing are respectively provided with a first through slot and a second through slot. The PCB board is disposed at the bottom of the housing. The PCB board and the sound-generating component are connected by cables passing through the first and second through slots. Compared with the prior art where the PCB board is disposed on the side, it does not require additional vertical height and horizontal width. Under the premise of high sensitivity, it can be installed in various earphone housings without the need for additional earphone housing design for the speaker. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the structure of a planar full-range loudspeaker provided for an embodiment of this utility model;

[0028] Figure 2 A cross-sectional structural schematic diagram of a planar full-range speaker with a concealed diaphragm assembly provided for an embodiment of this utility model;

[0029] Figure 3 An exploded view of a planar full-range loudspeaker provided for an embodiment of this utility model;

[0030] Figure 4 This is a frequency response curve of the diaphragm and the first magnet of the planar full-range speaker in this embodiment of the present invention under different distance parameters;

[0031] Figure 5 This is a frequency response curve of the planar full-range speaker diaphragm and the first magnet installed in the earphone housing under different distance parameters in this embodiment of the present invention;

[0032] Figure 6 This is a frequency response curve of the sound outlet of the planar full-range speaker in this embodiment of the present invention under different diameter parameters;

[0033] Figure 7 This is a frequency response curve of the planar full-range speaker's sound outlet with different diameter parameters after being installed inside the earphone housing in an embodiment of this utility model.

[0034] Figure 8 This is a frequency response curve of the voice coil of the planar full-range loudspeaker under different height parameters in an embodiment of this utility model;

[0035] Figure 9 This is a frequency response curve of the voice coil of the planar full-range speaker in this embodiment of the present invention after being installed in the earphone housing under different height parameters;

[0036] Figure 10 This is a frequency response curve of the first magnet of the planar full-range speaker in this embodiment of the present invention under different thickness parameters;

[0037] Figure 11 This is a frequency response curve diagram of the first magnet of the planar full-range speaker in this embodiment of the present invention after being installed in the earphone shell under different thickness parameters;

[0038] Figure 12 This is a frequency response curve of the second magnet of the planar full-range speaker in this embodiment of the present invention under different thickness parameters;

[0039] Figure 13 This is a frequency response curve diagram of the second magnet of the planar full-range speaker in this embodiment of the present invention after being installed in the earphone shell under different thickness parameters;

[0040] Figure 14 This is a frequency response curve of the voice coil and the second magnet of the planar full-range speaker in this embodiment of the present invention under different distance parameters;

[0041] Figure 15 This is a frequency response curve of the voice coil and the second magnet of the planar full-range speaker in this embodiment of the present invention after being installed in the earphone housing under different distance parameters;

[0042] Figure 16 This is a frequency response curve of the second inner magnet under different diameter parameters in an embodiment of this utility model;

[0043] Figure 17 This is a frequency response curve diagram of the second inner magnet installed in the earphone shell under different diameter parameters in the embodiments of this utility model;

[0044] Figure 18 This is a frequency response curve of the diaphragm under different thickness parameters in the embodiments of this utility model;

[0045] Figure 19 This is a frequency response curve diagram of the diaphragm after it is installed in the earphone shell under different thickness parameters in the embodiments of this utility model;

[0046] Figure 20 This is a frequency response curve diagram of the diaphragm after it is installed in the earphone shell under different diameter parameters in the embodiments of this utility model;

[0047] Figure 21 This is a frequency response curve diagram of the diaphragm after it is installed in the earphone shell under different diameter parameters in the embodiments of this utility model.

[0048] In the picture:

[0049] 1. Protective cover; 11. First annular portion; 12. Second annular portion; 13. Annular step; 14. Sound outlet; 15. First through slot; 2. Housing; 21. Second through slot; 3. Sound generating assembly; 31. Diaphragm assembly; 311. Diaphragm; 312. Copper ring; 32. Voice coil; 33. First magnet; 331. First inner magnet; 332. First outer magnet; 34. Second magnet; 341. Second inner magnet; 342. Second outer magnet; 4. PCB board; 41. Third through slot. Detailed Implementation

[0050] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0051] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0054] While everyone's preference for sound is subjective, the Harman Curve is a well-known idealized audio frequency response curve derived from extensive subjective listening tests conducted by Harman International Industries. It aims to present a sound frequency response characteristic that is pleasing and preferred by the vast majority of listeners, and is widely mentioned in the headphone and speaker industries. The Harman Curve is characterized by a moderate boost in the low-frequency range, resulting in a fuller, more powerful bass response and more impactful rhythms; clear and natural vocals in the mid-range, faithfully reproducing the singer's timbre; and appropriate extension in the high-frequency range, presenting a bright yet not harsh transparency, preserving the details of high-frequency sounds such as strings and cymbals. Overall, headphones that follow the Harman Curve do not have any particular frequency band that is overly prominent or recessed; the sound is relatively harmonious across frequency bands, allowing ordinary people to enjoy a comfortable and balanced listening experience without complex adjustments. This utility model embodiment will be explained in conjunction with the frequency response curves and Harman Curve obtained through testing.

[0055] Example 1

[0056] like Figures 1 to 3 As shown, this utility model embodiment provides a planar full-range speaker, including a cover 1 and a housing 2. The housing 2 is cylindrical, and a mounting cavity is formed between the cover 1 and the housing 2. A sound-generating component 3 is disposed in the mounting cavity. The cover 1 includes a first annular portion 11 and a second annular portion 12, both of which are cylindrical. The first annular portion 11 is located below the second annular portion 12. A first through groove 15 is formed on the side of the second annular portion 12. A second through groove 21 corresponding to the first through groove 15 is formed on the side of the housing 2. When the cover 1 and the housing 2 are installed together, the first through groove 15 and the second through groove 21 form a slot. A PCB board 4 is disposed at the bottom of the housing 2. The PCB board 4 is electrically connected to the sound-generating component 3 through a cable, and the cable passes through the first through groove 15 and the second through groove 21.

[0057] This utility model embodiment provides a planar full-range speaker. The sound-generating component 3 is disposed inside the cover 1 and the housing 2. The cover 1 and the housing 2 are respectively provided with a first through groove 15 and a second through groove 21. The PCB board 4 is disposed at the bottom of the housing 2. The PCB board 4 and the sound-generating component 3 are connected by a cable (not shown) passing through the first through groove 15 and the second through groove 21. Compared with the prior art where the PCB board 4 is disposed on the side, there is no need to increase the vertical height and horizontal width. Under the premise of high sensitivity, it can be installed in various headphone housings without the need for additional headphone housing design for the speaker.

[0058] In some embodiments, such as Figure 1 and 3 As shown, a third through slot 41 is provided on the outer periphery of the PCB board 4, and the third through slot 41 is located below the second through slot 21. Specifically, when the cable is routed, it passes from the sound-generating component 3 through the first through slot 15 and the second through slot 21 and then connects to the PCB board 4. The third through slot 41 is provided on the PCB board 4 so that the cable passes through the third through slot 41. The third through slot 41 guides the cable and makes the cable run at an angle to the PCB board 4, without occupying additional space on the lower side of the PCB board 4.

[0059] In some embodiments, such as Figure 1 and 3 As shown, in order to make the connection between the housing 2, the cover 1 and the PCB board 4 more secure, the housing 2 is fitted into the inner cavity of the second annular part 12, the bottom of the second annular part 12 completely covers the bottom of the housing 2, and the bottom of the second annular part 12 is attached to the side of the PCB board 4.

[0060] In some embodiments, such as Figure 1 and 3As shown, the sound-generating component 3 includes a diaphragm assembly 31, a voice coil 32, a first magnet 33, and a second magnet 34. The voice coil 32 is connected to the lower part of the diaphragm assembly 31. The diaphragm assembly 31 includes a diaphragm 311 and a copper ring 312. The first magnet 33 is located above the diaphragm assembly 31 and is installed in the inner cavity of the second annular portion 12. The first magnet 33 includes a first inner magnet 331 and a first outer magnet 332. The first inner magnet 331 is fitted into the central groove of the first outer magnet 332. The second magnet 34 is located below the voice coil 32 and is installed in the inner cavity of the housing 2. The second magnet 34 includes a second inner magnet 341 and a second outer magnet 342. The second inner magnet 341 is fitted into the central groove of the second outer magnet 342. Specifically, in this embodiment, magnets are placed on both the top and bottom of the diaphragm 311 to achieve balanced magnetic drive. This design significantly increases the driving force and improves efficiency by generating superimposed Lorentz forces in the same direction on both sides of the same point of the diaphragm 311 using the same audio current. Utilizing the complementary effect of the upper and lower magnetic fields on distance changes, nonlinear distortion is greatly reduced, improving sound fidelity. The symmetry and control of diaphragm motion are improved, enhancing transient response.

[0061] In some embodiments, such as Figure 2 and 3 As shown, in order to fix the diaphragm assembly 31, an annular step 13 is formed between the inner sides of the first annular portion 11 and the second annular portion 12, and the copper ring 312 is connected between the annular step 13 and the top of the housing 2.

[0062] In some embodiments, the distance between the diaphragm 311 and the first magnet 33 is 0.5 mm to 0.7 mm. Preferably, the distance between the diaphragm 311 and the first magnet 33 can be 0.6 mm; for example... Figure 4 As shown, Figure 4 The graphs show the frequency response of a planar full-range speaker when the distance between the diaphragm 311 and the first magnet 33 is 0.5mm (red line), 0.6mm (green line), and 0.7mm (blue line). Figure 5 As shown, Figure 5 The image shows the frequency response curve of the headphone when the planar full-range speaker is installed in the headphone housing. The frequency response curve obtained from the test indicates that the distance design between the diaphragm 311 and the first magnet 33 of the planar full-range speaker is reasonable, and the frequency response curve is close to the ideal state to a certain extent, meeting the requirements for good acoustic performance.

[0063] In some embodiments, the cover 1 has a sound outlet 14, the diameter of which is 2.5 mm to 3.0 mm. Preferably, the diameter of the sound outlet 14 can be 2.6 mm, 2.7 mm, 2.8 mm, or 2.9 mm. Figure 6 As shown, Figure 6 This is a frequency response graph showing the output diameters of the planar full-range speaker 14 for 3.0mm (red line), 2.8mm (green line), and 2.5mm (blue line). Figure 7 As shown, Figure 7 This is a frequency response curve of the headphones when the planar full-range speaker is installed in the headphone housing. The frequency response curve obtained from the test shows that the diameter design of the sound outlet 14 of the planar full-range speaker is reasonable, and the frequency response curve is close to the ideal state to a certain extent, meeting the requirements for good acoustic performance.

[0064] In some embodiments, the height of the voice coil 32 is 0.2 mm to 0.3 mm. Preferably, the height of the voice coil 32 can be 0.25 mm. Figure 8 As shown, Figure 8 This is a frequency response graph showing the height of the voice coil 32 in a planar full-range speaker at 0.3mm (red line), 0.25mm (green line), and 0.2mm (blue line). Figure 9 As shown, Figure 9 This is a frequency response curve of the headphones when the planar full-range speaker is installed in the headphone housing. The frequency response curve obtained from the test shows that the 32mm voice coil height design of this planar full-range speaker is reasonable, and the frequency response curve is close to the ideal state to a certain extent, meeting the requirements for good acoustic performance.

[0065] In some embodiments, the thickness of the first magnet 33 is 0.5 mm to 0.8 mm; preferably, the thickness of the first magnet 33 can be 0.6 mm, 0.65 mm, or 0.7 mm. Figure 10 As shown, Figure 10 The graphs show the frequency response curves for the first magnet 33 of the planar full-range speaker when its thickness is 0.8mm (red line), 0.65mm (green line), and 0.5mm (blue line). Figure 11 As shown, Figure 11 This is a frequency response curve of the headphone when the planar full-range speaker is installed in the headphone housing. The frequency response curve obtained from the test shows that the thickness design of the first magnet 33 of this planar full-range speaker is reasonable, and the frequency response curve is close to the ideal state to a certain extent, meeting the requirements for good acoustic performance.

[0066] In some embodiments, the thickness of the second magnet 34 is 2.5 mm to 2.8 mm. Preferably, the thickness of the second magnet 34 can be 2.6 mm, 2.65 mm, or 2.7 mm. Figure 12 As shown, Figure 12 The graphs show the frequency response curves for the second magnet 34 of the planar full-range speaker when its thickness is 2.8mm (red line), 2.65mm (green line), and 2.5mm (blue line). Figure 13 As shown, Figure 13 This is a frequency response curve of the headphone when the planar full-range speaker is installed in the headphone housing. The frequency response curve obtained from the test shows that the thickness design of the second magnet 34 of this planar full-range speaker is reasonable, and the frequency response curve is close to the ideal state to a certain extent, meeting the requirements for good acoustic performance.

[0067] In some embodiments, the distance between the voice coil 32 and the second magnet 34 is 0.4 mm to 0.6 mm; preferably, the distance between the voice coil 32 and the second magnet 34 can be 0.5 mm. Figure 14 As shown, Figure 14 The frequency response curves for the planar full-range loudspeaker when the distance between the voice coil 32 and the second magnet 34 is 0.4mm (red line), 0.5mm (green line), and 0.6mm (blue line). Figure 15 As shown, Figure 15 This is a frequency response curve of the headphone when the planar full-range speaker is installed in the headphone housing. The frequency response curve obtained from the test shows that the distance design between the voice coil 32 and the second magnet 34 of this planar full-range speaker is reasonable, and the frequency response curve is close to the ideal state to a certain extent, meeting the requirements for good acoustic performance.

[0068] In some embodiments, the diameter of the second inner magnet 341 is 1.8 mm to 2.2 mm. Preferably, the diameter of the second inner magnet 341 can be 1.9 mm, 2.0 mm, or 2.1 mm. Figure 16 As shown, Figure 16 The graphs show the frequency response curves for the second internal magnet 341 of the planar full-range loudspeaker when its diameter is 1.8mm (red line), 2.0mm (green line), and 2.2mm (blue line). Figure 17 As shown, Figure 17 This is a frequency response curve of the headphone when the planar full-range speaker is installed in the headphone housing. The frequency response curve obtained from the test shows that the diameter design of the second internal magnet 341 of this planar full-range speaker is reasonable, and the frequency response curve is close to the ideal state to a certain extent, meeting the requirements for good acoustic performance.

[0069] In some embodiments, the thickness of the membrane 311 is 5 μm to 7 μm; preferably, the thickness of the membrane 311 can be 6 μm. Figure 18 As shown, Figure 18The graphs show the frequency response curves of the planar full-range speaker diaphragm 311 with thicknesses of 5μm (red line), 6μm (green line), and 7μm (blue line). Figure 19 As shown, Figure 19 This is a frequency response curve of the headphone when the planar full-range speaker is installed in the headphone housing. The frequency response curve obtained from the test shows that the thickness design of the diaphragm 311 of this planar full-range speaker is reasonable, and the frequency response curve is close to the ideal state to a certain extent, meeting the requirements for good acoustic performance.

[0070] In some embodiments, the diameter of the diaphragm 311 is 8.6 mm to 8.9 mm. Preferably, the diameter of the diaphragm 311 can be 8.7 mm, 8.75 mm, or 8.8 mm. Figure 20 As shown, Figure 20 The graphs show the frequency response curves of the planar full-range speaker diaphragm 311 when its diameter is 8.9 mm (red line), 8.75 mm (green line), and 8.6 mm (blue line). Figure 21 As shown, Figure 21 This is a frequency response curve of the headphone when the planar full-range speaker is installed in the headphone housing. The frequency response curve obtained from the test shows that the diameter design of the diaphragm 311 of this planar full-range speaker is reasonable, and the frequency response curve is close to the ideal state to a certain extent, meeting the requirements for good acoustic performance.

[0071] Example 2

[0072] This utility model embodiment provides an earphone, including the planar full-range speaker described in Embodiment 1 above.

[0073] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A planar full-range loudspeaker, characterized in that, It includes a cover and a housing, with a mounting cavity formed between the cover and the housing, and a sound-generating component disposed within the mounting cavity; The cover includes a first annular portion and a second annular portion. The first annular portion is located below the second annular portion. A first through groove is provided on the side of the second annular portion. A second through groove corresponding to the first through groove is provided on the side of the housing. A PCB board is provided at the bottom of the housing. The PCB board is electrically connected to the sound-generating component through a cable. The cable passes through the first through groove and the second through groove.

2. A planar full-range loudspeaker according to claim 1, characterized in that, A third through slot is provided on the outer periphery of the PCB board, and the third through slot is located below the second through slot.

3. A planar full-range loudspeaker according to claim 1, characterized in that, The housing is fitted inside the cavity of the second annular portion, the bottom of the second annular portion completely covers the bottom of the housing, and the bottom of the second annular portion is attached to the side of the PCB board.

4. A planar full-range loudspeaker according to any one of claims 1 to 3, characterized in that, The sound-generating component includes a diaphragm assembly, a voice coil, a first magnet, and a second magnet; The voice coil is connected below the diaphragm assembly, which includes a diaphragm and a copper ring; The first magnet is located above the diaphragm assembly and is installed in the inner cavity of the second annular portion. The first magnet includes a first inner magnet and a first outer magnet, with the first inner magnet sleeved in the central groove of the first outer magnet. The second magnet is located below the voice coil and is installed in the inner cavity of the housing. The second magnet includes a second inner magnet and a second outer magnet, with the second inner magnet sleeved in the central groove of the second outer magnet.

5. A planar full-range loudspeaker according to claim 4, characterized in that, An annular step is formed between the inner sides of the first annular portion and the second annular portion, and the copper ring is connected between the annular step and the top of the housing.

6. A planar full-range loudspeaker according to claim 4, characterized in that, The distance between the diaphragm and the first magnet is 0.5 mm to 0.7 mm.

7. A planar full-range loudspeaker according to claim 1, characterized in that, The cover has a sound outlet with a diameter of 2.5mm to 3.0mm.

8. A planar full-range loudspeaker according to claim 4, characterized in that, The height of the voice coil is 0.2 mm to 0.3 mm.

9. A planar full-range loudspeaker according to claim 4, characterized in that, The thickness of the first magnet is 0.5 mm to 0.8 mm; And / or, the thickness of the second magnet is 2.5 mm to 2.8 mm.

10. A planar full-range loudspeaker according to claim 4, characterized in that, The distance between the voice coil and the second magnet is 0.4 mm to 0.6 mm; And / or, the diameter of the second inner magnet is 1.8 mm to 2.2 mm.

11. A planar full-range loudspeaker according to claim 4, characterized in that, The thickness of the membrane is 5 μm to 7 μm; And / or, the diameter of the diaphragm is 8.6 mm to 8.9 mm.

12. An earphone, characterized in that, Includes a planar full-range loudspeaker as described in any one of claims 1 to 11.

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