A planar low-frequency speaker and headphones
Patent Information
- Application Number
- CN202521413707.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-07
- Publication Date
- 2026-08-14
- Estimated Expiration
- 2035-07-07
AI Technical Summary
目前平面喇叭都是包括壳体，壳体内部设置有发声组件，发生组件包括有音圈，音圈通过线电连接至外部的PCB板，外部的PCB板通常设置于壳体的侧面或者底面，在一定的程度增加了整个喇叭的厚度或者宽度，因此耳机在设计时，根据灵敏度再去设计各发音组件的尺寸，无法做到统一的标准，每一款耳机都需要单独的平面喇叭设计
本实用新型提供一种平面低频喇叭及耳机，PCB板套设在护盖的第三环形部上且抵接在第二环形部的顶部，相比与现有技术中设置在侧面或者壳体的底部，整个平面低频喇叭的厚度可以做的更小，在具备高灵敏度的前提下，能够作为标准件适用于安装于各耳机壳体内，降低耳机设计成本。
Smart Images
Figure CN224638148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of loudspeaker technology, and in particular to a planar low-frequency loudspeaker and headphones. Background Technology
[0002] Speakers come in three types: dynamic, balanced armature, and planar magnetic. Planar magnetic speakers offer better sound quality compared to dynamic and balanced armature speakers. Currently, planar magnetic speakers consist of a housing containing the sound-producing components, including a voice coil. The voice coil is electrically connected to an external PCB board, which is typically located on the side or bottom of the housing. This increases the overall thickness or width of the speaker. Therefore, when designing headphones, the dimensions of each sound-producing component must be determined based on sensitivity, making a uniform standard impossible. Each headphone requires a unique planar magnetic speaker design. Utility Model Content
[0003] Based on the above, the purpose of this utility model is to provide a planar low-frequency speaker and headphones, which have high sensitivity and can be installed in various headphone housings.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: On the one hand, this utility model provides a planar low-frequency speaker, 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; The cover includes a first annular portion, a second annular portion, and a third annular portion. The diameters of the first annular portion, the second annular portion, and the third annular portion gradually decrease. A first sound outlet is provided at the center of the top of the third annular portion. A PCB board is fitted around the outer periphery of the third annular portion. The PCB board includes a PCB clearance groove. The PCB board is tightly attached to the top of the second annular portion. The PCB board is electrically connected to the sound-generating component. A second sound outlet is provided at the center of the bottom of the housing.
[0005] Furthermore, the sound-generating component includes a diaphragm assembly, a voice coil, a first magnet, a second inner magnet, and a second outer magnet; The first magnet is disposed in the inner cavity of the first annular portion, the second outer magnet is disposed in the inner cavity of the housing, the second outer magnet has a through hole structure running vertically through the middle, and the second inner magnet is disposed in the through hole; The diaphragm assembly is disposed between the first magnet and the second inner magnet; The voice coil is connected below the diaphragm assembly.
[0006] Furthermore, the distance H1 between the diaphragm assembly and the first magnet is 0.4 mm to 0.7 mm.
[0007] Furthermore, the height H2 of the voice coil is between 0.2 mm and 0.3 mm; And / or, the wire diameter D1 of the voice coil is between 0.045 mm and 0.055 mm; And / or, the diameter D2 of the voice coil is between 2.3 mm and 2.5 mm.
[0008] Furthermore, the diameter D3 of the second inner magnet is between 3.9 mm and 4.0 mm; And / or, the diameter D4 of the first magnet is between 4.0 mm and 4.3 mm.
[0009] Furthermore, the diaphragm assembly includes a diaphragm and a copper ring; The thickness H3 of the membrane is between 20 μm and 35 μm.
[0010] Furthermore, a first annular step is formed on the inner side of the first annular portion and the inner side of the second annular portion, the copper ring is connected between the first annular step and the top of the housing, and the housing is fitted onto the inner side of the first annular portion.
[0011] Furthermore, a first through groove is provided on the first annular portion, and a second through groove corresponding to the first through groove is provided on the housing.
[0012] On the other hand, an earphone is provided, including the planar low-frequency speaker described above.
[0013] The beneficial effects of this utility model are as follows: This utility model provides a planar low-frequency speaker and headphones. The PCB board is sleeved on the third annular part of the cover and abuts against the top of the second annular part. Compared with the prior art where it is set on the side or the bottom of the shell, the thickness of the entire planar low-frequency speaker can be made smaller. Under the premise of high sensitivity, it can be used as a standard part to be installed in various headphone shells, reducing headphone design costs. Attached Figure Description
[0014] 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.
[0015] Figure 1 This invention provides a planar low-frequency speaker. Figure 2This invention provides a cross-sectional structural schematic diagram of a planar low-frequency speaker diaphragm-concealed assembly according to an embodiment of the present invention. Figure 3 This invention provides an exploded view of the planar low-frequency speaker according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of the protective cover provided in an embodiment of the present utility model; Figure 5 This is a frequency response curve of the planar low-frequency speaker according to an embodiment of the present invention under different distance parameters between the diaphragm assembly and the first magnet; Figure 6 The frequency response curves of the planar low-frequency speaker of this utility model under different parameters of voice coil height are shown. Figure 7 The frequency response curves of the planar low-frequency speaker of this utility model under different parameters of voice coil wire diameter are shown. Figure 8 The frequency response curves of the planar low-frequency speaker of this utility model under different parameters of voice coil diameter are shown. Figure 9 This is a frequency response curve of the planar low-frequency speaker of this utility model under different parameters of the diameter of the first magnet; Figure 10 This is a frequency response curve of the planar low-frequency speaker of this utility model under different parameters of the diameter of the second inner magnet; Figure 11 The frequency response curves of the planar low-frequency speaker according to an embodiment of the present invention are shown under different diaphragm thicknesses.
[0016] In the picture: 1. Protective cover; 11. First annular portion; 12. Second annular portion; 13. Third annular portion; 14. First annular step; 15. First sound outlet; 16. First through groove; 2. Housing; 21. Second sound outlet; 22. Second through groove; 3. Sound generating assembly; 31. Diaphragm assembly; 311. Diaphragm; 312. Copper ring; 32. Voice coil; 33. First magnet; 341. Second inner magnet; 342. Second outer magnet; 4. PCB board; 41. PCB clearance ring groove. Detailed Implementation
[0017] 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.
[0018] 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.
[0019] 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.
[0020] 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.
[0021] 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.
[0022] Example 1 like Figures 1 to 4 As shown, this utility model provides a planar low-frequency speaker, including a cover 1 and a housing 2. A mounting cavity is formed between the cover 1 and the housing 2, and a sound-generating component 3 is disposed in the mounting cavity. The housing 2 is cylindrical. The cover 1 includes a first annular portion 11, a second annular portion 12, and a third annular portion 13. The first annular portion 11, the second annular portion 12, and the third annular portion 13 are all cylindrical, and their diameters gradually decrease. A first sound outlet 15 is provided at the center of the top of the third annular portion 13. A PCB board 4 is fitted around the outer periphery of the third annular portion 13. The PCB board 4 includes a PCB clearance groove 41, which is fitted around the outer periphery of the third annular portion 13 and fits to the outer periphery of the third annular portion 13. The PCB board 4 is tightly attached to the top of the second annular portion 12. The PCB board 4 is electrically connected to the sound-generating component 3. A second sound outlet 21 is provided at the center of the bottom of the housing 2.
[0023] This utility model embodiment provides a planar low-frequency speaker and headphones. The PCB board 4 is sleeved on the third annular part 13 of the cover 1 and abuts against the top of the second annular part 12. Compared with the prior art where it is set on the side or the bottom of the shell 2, the thickness of the entire planar low-frequency speaker can be made smaller. Under the premise of high sensitivity, it can be used as a standard part to be installed in each headphone shell 2, reducing the headphone design cost.
[0024] In some embodiments, such as Figure 2 and 3 As shown, the sound-generating component 3 includes a diaphragm component 31, a voice coil 32, a first magnet 33, a second inner magnet 341, and a second outer magnet 342. The first magnet 33 is disposed in the inner cavity of the first annular portion 11, and the second outer magnet 342 is disposed in the inner cavity of the housing 2. The second outer magnet 342 has a through-hole structure running vertically through the middle, and the second inner magnet 341 is disposed in the through-hole. The diaphragm component 31 is disposed between the first magnet 33 and the second inner magnet 341. The voice coil 32 is connected to the lower part of the diaphragm component 31. Specifically, in this embodiment, through the symmetrical driving magnetic circuit of the first magnet 33, the second inner magnet 341, and the second outer magnet 342, a magnetic field with sufficient strength and opposite direction is constructed on both sides of the effective conductor area of the diaphragm component 31, thereby achieving efficient, low-distortion, and highly controllable linear driving of the diaphragm component 31.
[0025] In some embodiments, such as Figures 2 to 4As shown, to fix the diaphragm assembly 31, the diaphragm assembly 31 includes a copper ring 312 and a diaphragm 311. The copper ring 312 is fixedly connected to the bottom of the outer periphery of the diaphragm 311. A first annular step 14 is formed on the inner side of the first annular portion 11 and the inner side of the second annular portion 12. The copper ring 312 is connected between the first annular step 14 and the top of the housing 2. The housing 2 is sleeved on the inner side of the first annular portion 11. Specifically, in this embodiment, the copper ring 312 of the diaphragm assembly 31 is fixed between the first annular step 14 and the top of the housing 2, while the housing 2 is sleeved on the outer side of the first annular portion 11 for easy assembly and disassembly.
[0026] In some embodiments, such as Figures 2 to 4 As shown, a first through groove 16 is provided on the first annular portion 11, and a second through groove 22 corresponding to the first through groove 16 is provided on the housing 2. Specifically, when the housing 2 and the cover 1 are connected together, the first through groove 16 and the second through groove 22 form a closed slot, which allows the cable electrically connected between the PCB board 4 and the voice coil 32 to pass through.
[0027] In some embodiments, the distance H1 between the diaphragm assembly 31 and the first magnet 33 is 0.4 mm to 0.7 mm. Specifically, the distance H1 between the diaphragm 311 and the first magnet 33 can be 0.5 mm, 0.55 mm, or 0.6 mm, such as... Figure 5 As shown, Figure 5 The frequency response curves of the planar low-frequency speaker are shown when H1 is 0.4mm (red line), 0.55mm (green line), and 0.7mm (blue line). From the frequency response curves obtained from the test, the distance H1 between the diaphragm 311 and the first magnet 33 of the planar low-frequency speaker is reasonably designed, and the frequency response curve is close to the ideal state to a certain extent, which can meet the requirements of good acoustic performance.
[0028] In some embodiments, the height H2 of the voice coil 32 is between 0.2 mm and 0.3 mm; specifically, the height H2 of the voice coil 32 can also be 0.25 mm. Figure 6 As shown, Figure 6 The graphs show the frequency response curves of the voice coil 32 height H2 of the planar low-frequency speaker when it is 0.2mm (blue line), 0.25mm (green line), and 0.3mm (red line). From the frequency response curves obtained from the test, the design of the voice coil 32 height H2 of the planar low-frequency speaker is reasonable to a certain extent. The frequency response curve is close to the ideal state to a certain extent and can meet the requirements of good acoustic performance.
[0029] In some embodiments, the wire diameter D1 of the voice coil 32 is between 0.045 mm and 0.055 mm; specifically, the wire diameter D1 of the voice coil 32 can also be 0.050 mm. Figure 7 As shown, Figure 7 The frequency response curves of the planar low-frequency speaker with voice coil 32 wire diameter D1 of 0.045mm (blue line), 0.050mm (green line), and 0.055mm (red line) are shown. From the frequency response curves obtained from the test, the design of the 32 wire diameter D1 of the planar low-frequency speaker with voice coil is reasonable to a certain extent. The frequency response curve is close to the ideal state to a certain extent and can meet the requirements of good acoustic performance.
[0030] In some embodiments, the diameter D2 of the voice coil 32 is between 2.3 mm and 2.5 mm. Specifically, the diameter D2 of the voice coil 32 can also be 2.4 mm. Figure 8 As shown, Figure 8 The graphs show the frequency response curves of the voice coil 32 of the planar low-frequency speaker when the diameter D2 is 2.3mm (blue line), 2.4mm (green line), and 2.5mm (red line). From the frequency response curves obtained from the test, the design of the voice coil 32 diameter D2 of this planar low-frequency speaker is reasonable to a certain extent. The frequency response curve is close to the ideal state to a certain extent and can meet the requirements of good acoustic performance.
[0031] In some embodiments, the diameter D3 of the second inner magnet 341 is between 3.9 mm and 4.0 mm; specifically, the diameter D3 of the second inner magnet 341 can also be 3.95 mm. Figure 9 As shown, Figure 9 The frequency response curves are shown for the diameter D3 of the second inner magnet 341 of the planar low-frequency speaker when it is 3.9mm (blue line), 3.95mm (green line), and 4.0mm (red line). From the frequency response curves obtained from the test, the design of the diameter D3 of the second inner magnet 341 of the planar low-frequency speaker is reasonable to a certain extent, and the frequency response curve is close to the ideal state to a certain extent, which can meet the requirements of good acoustic performance.
[0032] In some embodiments, the diameter D4 of the first magnet 33 is between 4.0 mm and 4.3 mm. Specifically, the diameter D4 of the first magnet 33 can also be 4.15 mm. Figure 10 As shown, Figure 10 The frequency response curves are shown for the diameter D4 of the first magnet 33 of the planar low-frequency speaker when it is 4.0mm (blue line), 4.15mm (green line), and 4.3mm (red line). From the frequency response curves obtained from the test, the design of the diameter D4 of the first magnet 33 of the planar low-frequency speaker is reasonable to a certain extent, and the frequency response curve is close to the ideal state to a certain extent, which can meet the requirements of good acoustic performance.
[0033] In some embodiments, the diaphragm assembly 31 includes a diaphragm 311 and a copper ring 312; the thickness H3 of the diaphragm 311 is between 20 μm and 35 μm. Specifically, the thickness H3 of the diaphragm 311 can also be 25 μm or 30 μm. Figure 11 As shown, Figure 11 The graphs show the frequency response curves of the diaphragm 311 of the planar low-frequency speaker when the thickness H3 is 20μm (red line), 25μm (green line), and 35μm (blue line). From the frequency response curves obtained from the test, the design of the thickness H3 of the planar low-frequency speaker diaphragm 311 is reasonable to a certain extent, and the frequency response curve is close to the ideal state to a certain extent, which can meet the requirements of good acoustic performance.
[0034] Example 2 This utility model provides an earphone, including a planar low-frequency speaker as described in Embodiment 1 above.
[0035] 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 low frequency loudspeaker, characterized by, 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, a second annular portion, and a third annular portion. The diameters of the first annular portion, the second annular portion, and the third annular portion gradually decrease. A first sound outlet is provided at the center of the top of the third annular portion. A PCB board is fitted around the outer periphery of the third annular portion. The PCB board includes a PCB clearance groove. The PCB board is tightly attached to the top of the second annular portion. The PCB board is electrically connected to the sound-generating component. A second sound outlet is provided at the center of the bottom of the housing.
2. A planar low-frequency horn according to claim 1, characterized in that The sound-generating component includes a diaphragm assembly, a voice coil, a first magnet, a second inner magnet, and a second outer magnet; The first magnet is disposed in the inner cavity of the first annular portion, the second outer magnet is disposed in the inner cavity of the housing, the second outer magnet has a through hole structure running vertically through the middle, and the second inner magnet is disposed in the through hole; The diaphragm assembly is disposed between the first magnet and the second inner magnet; The voice coil is connected below the diaphragm assembly.
3. A planar low-frequency horn according to claim 2, characterized in that The distance H1 between the diaphragm assembly and the first magnet is 0.4 mm to 0.7 mm.
4. A planar low-frequency horn according to claim 2, characterized in that The height H2 of the voice coil is between 0.2 mm and 0.3 mm; And / or, the wire diameter D1 of the voice coil is between 0.045 mm and 0.055 mm; And / or, the diameter D2 of the voice coil is between 2.3 mm and 2.5 mm.
5. A planar low-frequency horn according to claim 2, characterized in that The diameter D3 of the second internal magnet is between 3.9 mm and 4.0 mm; And / or, the diameter D4 of the first magnet is between 4.0 mm and 4.3 mm.
6. A planar low-frequency horn according to claim 2, characterized in that The diaphragm assembly includes a diaphragm and a copper ring; The thickness H3 of the membrane is between 20 μm and 35 μm.
7. A planar low-frequency horn according to claim 6, characterized in that A first annular step is formed on the inner side of the first annular portion and the inner side of the second annular portion. The copper ring is connected between the first annular step and the top of the housing. The housing is fitted inside the first annular portion.
8. A planar low-frequency horn according to claim 1, characterized in that The first annular portion has a first through groove, and the housing has a second through groove corresponding to the first through groove.
9. An earphone, characterized by Includes a planar low-frequency loudspeaker as described in any one of claims 1 to 8.