A planar diaphragm loudspeaker with a composite membrane coil

Abstract

The utility model discloses a kind of plane diaphragm loudspeakers of composite film coil, including shell, plane film is equipped in shell, the side of plane film away from shell is equipped with A face coil;A face coil is annular structure of coiling, the middle part of A face coil is left empty to form A face coil hollow position, A face embossed film is equipped in A face coil hollow position, A face embossed film is completely filled and set in A face coil hollow position, A face embossed film is set on plane film, the side of plane film close to shell is equipped with B face coil, the center through hole of plane film is centrally provided;B face coil is annular structure of coiling, the middle part of B face coil is left empty to form B face coil hollow position, B face embossed film is equipped in B face coil hollow position, B face embossed film is completely filled and set in B face coil hollow position, B face embossed film is set on plane film.The utility model can improve high frequency response, optimize sound quality performance, bring better auditory experience for user.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to a planar diaphragm loudspeaker with a composite diaphragm coil, and more particularly to a planar diaphragm loudspeaker with a dual-coil composite diaphragm. Background Technology

[0002] A planar magnetic diaphragm speaker consists of conductor wires laid on a planar diaphragm. The diaphragm is placed in a magnetic field, and sound is produced by the diaphragm moving synchronously in the magnetic field due to changes in the current signal in the voice coil. In existing planar magnetic diaphragm speaker designs, the sound curve is altered by adjusting the air permeability through the external tuning mesh or tuning paper. However, this method has limited tuning effects, cannot precisely control the acoustic characteristics within the diaphragm, suffers from an uneven sound curve and unsatisfactory high-frequency response, and also increases the product's size. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a planar diaphragm speaker with a composite diaphragm coil. By setting an embossed diaphragm in the coil, the structural stress in the high-frequency band is changed, making the frequency response curve smoother.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A planar diaphragm speaker with a composite diaphragm coil includes a housing, a planar diaphragm disposed within the housing, and an A-plane coil disposed on the side of the planar diaphragm away from the housing; The A-side coil is a coiled ring structure with a gap in the middle to form the A-side coil hollow space. An A-side embossed film is placed in the A-side coil hollow space, and the A-side embossed film is completely filled in the A-side coil hollow space. The outer diameter of the A-side embossed film is set close to the inner diameter of the A-side coil, and the A-side embossed film is set on a flat film.

[0005] Furthermore, in some embodiments, a B-side coil is provided on the side of the planar thin film near the outer casing, and a through-hole is provided in the center of the planar thin film; The B-side coil is a coiled ring structure with a gap in the middle to form a hollow space. An embossed B-side film is placed in the hollow space, completely filling it. The outer diameter of the embossed B-side film is adjacent to the inner diameter of the B-side coil, and the embossed B-side film is placed on a flat film.

[0006] Furthermore, in some embodiments, a metal coating is deposited on the A-side embossed film and the B-side embossed film; A signal input terminal is provided at the edge of the planar thin film near the A-side coil. The input terminal of the outer ring of the A-side coil is connected to the signal input terminal, and the output terminal of the inner ring of the A-side coil extends to the central through hole. The output terminal of the inner ring of the A-side coil is provided with an A-side center connector, which is located on the central through hole.

[0007] Furthermore, in some embodiments, a signal output terminal is provided at the edge of the planar thin film near the B-side coil, the output terminal of the outer ring of the B-side coil is connected to the signal output terminal, and the input terminal of the inner ring of the B-side coil extends to the central through hole; the input terminal of the inner ring of the B-side coil is provided with a B-side center connector, and the B-side center connector is disposed on the central through hole. The center connector on side B is electrically connected to the center connector on side A through a center through hole.

[0008] Furthermore, in some embodiments, the ratio of the diameter of the embossed film on side B to the diameter of the coil on side B is 1:2~2.5; The ratio of the diameter of the embossed film on side A to the diameter of the coil on side A is 1:2~2.5; The coils on side A and side B of the planar film are matched and correspondingly set, and the embossed films on side A and side B of the planar film are matched and correspondingly set.

[0009] Furthermore, in some embodiments, a dustproof net, a lower support, a second U-shaped iron, and a gasket are sequentially provided in the outer casing. The second U-shaped iron is provided with a second annular magnet and a second circular magnet, and the gasket is disposed on the side of the planar film close to the outer casing. The side of the planar thin film away from the outer shell is provided with a membrane ring, a first U-shaped iron, an upper bracket, and a circuit board in sequence. The first U-shaped iron is provided with a first ring magnet and a first circular magnet. The side of the circuit board close to the planar thin film is provided with a contact spring.

[0010] This invention improves high-frequency response by covering a metal coil onto a planar thin film (diaphragm) and then attaching an embossed film to the empty area in the center of the coil.

[0011] Preferably, this invention can use a planar diaphragm speaker with a dual-coil composite diaphragm. A small embossed film is laminated to the empty area in the center region of each coil. The coils on the A and B sides of the film are electrically connected in series, which improves the high-frequency response, optimizes the sound quality, and makes the sound curve smoother, bringing a better listening experience to the user. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of this application; Figure 2 This is an exploded view of the coil portion on side A of an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the coil portion on side B of an embodiment of this application; Figure 4 This is a structural diagram of the coil portion on side A of an embodiment of this application; Figure 5 This is a cross-sectional schematic diagram of an embodiment of this application; Figure 6 This is a comparison chart of audio curves.

[0013] Explanation of reference numerals in the attached figures: 11. Outer shell, 12. Dustproof mesh, 13. Lower bracket, 14. Second U-shaped iron, 15. Second ring magnet, 16. Second circular magnet, 17. Gasket, 18. B-side embossed film, 19. B-side coil, 21. A-side coil, 22. Flat film, 23. Film ring, 24. A-side embossed film, 25. First circular magnet, 26. First ring magnet, 27. Upper bracket, 28. First U-shaped iron, 29. Circuit board, 32. Contact spring, 41. Hollow space in A-side coil, 42. A-side center connector, 43. Signal input terminal, 46. Hollow space in B-side coil, 47. B-side center connector, 48. Signal output terminal, 53. Center through hole. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] In the description of this utility model, it should be noted that the terms "lateral," "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0016] Referring to the accompanying drawings, this application includes a housing 11, within which are sequentially arranged a dustproof mesh 12, a lower support 13, a second U-shaped iron 14, and a gasket 17. The second U-shaped iron 14 houses a second annular magnet 15 and a second circular magnet 16. The gasket 17 is disposed on the side of the planar film 22 near the housing 11. On the side of the planar film 22 away from the housing 11, in sequence, are a membrane ring 23, a first U-shaped iron 28, an upper support 27, and a circuit board 29. The first U-shaped iron 28 houses a first annular magnet 26 and a first circular magnet 25. The circuit board 29, on the side near the planar film 22, has a contact spring 32. These components have been disclosed in the prior art and will not be described further here.

[0017] The outer casing 11 is provided with a planar thin film 22. The side of the planar thin film 22 away from the outer casing 11 is provided with an A-side coil 21, and the side of the planar thin film 22 close to the outer casing 11 is provided with a B-side coil 19. A through central hole 53 is opened in the center of the planar thin film 22.

[0018] A signal input terminal 43 is provided at the edge of the planar film 22 near the A-side coil 21. The A-side coil 21 is a coiled ring structure. The middle part of the A-side coil 21 is left empty to form the A-side coil hollow space 41, that is, the inner diameter of the A-side coil 21 is left empty to form the A-side coil hollow space 41. The input terminal of the outer ring of the A-side coil 21 is connected to the signal input terminal 43, and the output terminal of the inner ring of the A-side coil 21 extends to the central through hole 53. The output terminal of the inner ring of the A-side coil 21 is provided with an A-side center connector 42, which is set on the central through hole 53. An A-side embossed film 24 is provided in the A-side coil hollow space 41. The A-side embossed film 24 is completely filled in the A-side coil hollow space 41. The outer diameter of the A-side embossed film 24 is set close to the inner diameter of the A-side coil 21. The A-side embossed film 24 is set on the planar film 22.

[0019] Embossed film: Embossing on a substrate, the film substrate can be a thin film material such as PET, PEN, PEEK, PI, etc. Embossing technology is used to change the surface structure of the film material to improve the structural stress distribution of the high frequency part. The embossed film is composite and bonded with the flat film 22. Embossed films (composite films) can also be made of materials with good rigidity, such as liquid crystal polymer diaphragms (Liquid Crystal Polymer-LCP), carbon nanotube diaphragms (Garbon Nanotube-CNT), graphene diaphragms (Graphene), ceramic diaphragms (Ceramic), and diamond diaphragms (Diamond).

[0020] Embossed membranes can also be embossed composite membranes, with metal plating on side A (embossed membrane 24) and side B (embossed membrane 18). Embossed composite membranes: After embossing on the substrate membrane, a metal plating treatment (such as electroplating aluminum, titanium, nickel, beryllium, gold, aluminum, etc.) is applied. The plating changes the rigidity and magnetic properties of the membrane, improving the tone performance and achieving tone diversification; different plating materials will bring different tone performances, and tone customization can be achieved through different plating materials.

[0021] A signal output terminal 48 is provided at the edge of the planar thin film 22 near the B-side coil 19. The B-side coil 19 is a coiled ring structure, with a gap in the middle of the B-side coil 19 forming a B-side coil hollow space 46. In other words, the inner diameter of the B-side coil 19 is left empty, forming the B-side coil hollow space 46. The output terminal of the outer ring of the B-side coil 19 is connected to the signal output terminal 48, and the input terminal of the inner ring of the B-side coil 19 extends to the central through hole 53. The input terminal of the inner ring of the B-side coil 19 is provided with a B-side center connector 47, which is located on the central through hole 53. A B-side embossed film 18 is provided in the B-side coil hollow space 46, completely filling the B-side coil hollow space 46. The outer diameter of the B-side embossed film 18 is adjacent to the inner diameter of the B-side coil 19, and the B-side embossed film 18 is located on the planar thin film 22. The B-side center connector 47 and the A-side center connector 42 are electrically connected through the central through hole 53.

[0022] In this application, the coils on the A and B sides of the planar thin film 22 (diaphragm) are electrically connected in series and are made conductive by processes such as through-hole immersion gold or conductive liquid (adhesive); a small embossed film is laminated onto the empty area in the center of the two coils, and the embossed film is laminated onto the planar thin film 22 by processes such as spraying (adhesive) or pressing.

[0023] The ratio of the diameter of the embossed film 18 on side B to the diameter of the coil 19 on side B is 1:2~2.5; The ratio of the diameter of the embossed film 24 on side A to the diameter of the coil 21 on side A is 1:2~2.5; The coils 21 on side A and 19 on side B of the planar film 22 are matched and correspondingly set, and the embossed film 24 on side A and embossed film 18 on side B of the planar film 22 are matched and correspondingly set.

[0024] See appendix Figure 6 , attached Figure 6 Audio curve comparison chart: P1: Curve of a dual-coil planar diaphragm horn without a composite diaphragm; P2: The dual-coil composite diaphragm planar diaphragm horn curve of this application; The high-frequency portion of the P2 audio curve is smoother than the P1 audio curve.

[0025] The above detailed description includes references to the accompanying drawings, which form part of the detailed description. The drawings illustrate, by way of illustration, specific embodiments that can implement the present invention. These embodiments are also referred to herein as "examples". These examples may include other elements besides those shown and described. The inventors also anticipate examples using any combination or arrangement of the shown or described elements, either with respect to a particular example (or one or more aspects thereof) or with respect to other examples shown or described herein (or one or more aspects thereof).

Claims

1. A planar diaphragm loudspeaker comprising a composite membrane coil, comprising: The outer shell (11) has a planar thin film (22) inside, and an A-plane coil (21) is provided on the side of the planar thin film (22) away from the outer shell (11). The A-side coil (21) is a coiled ring structure. The middle part of the A-side coil (21) is left empty to form an A-side coil hollow space (41). An A-side embossed film (24) is provided in the A-side coil hollow space (41). The A-side embossed film (24) is completely filled in the A-side coil hollow space (41). The outer diameter of the A-side embossed film (24) is adjacent to the inner diameter of the A-side coil (21). The A-side embossed film (24) is set on a planar thin film (22).

2. A planar diaphragm loudspeaker of claim 1, wherein The planar film (22) has a B-side coil (19) on the side near the outer shell (11), and a through central hole (53) is opened in the center of the planar film (22). The B-side coil (19) is a coiled ring structure. The middle part of the B-side coil (19) is left empty to form the B-side coil hollow space (46). The B-side embossed film (18) is provided in the B-side coil hollow space (46). The B-side embossed film (18) is completely filled in the B-side coil hollow space (46). The outer diameter of the B-side embossed film (18) is close to the inner diameter of the B-side coil (19). The B-side embossed film (18) is set on the planar thin film (22).

3. A planar diaphragm loudspeaker of claim 2, wherein, The embossed film (24) on side A and the embossed film (18) on side B are coated with a metal coating. The planar thin film (22) has a signal input terminal (43) at the edge of the side near the A-side coil (21). The input terminal of the outer ring of the A-side coil (21) is connected to the signal input terminal (43). The output terminal of the inner ring of the A-side coil (21) extends to the central through hole (53). The output terminal of the inner ring of the A-side coil (21) has an A-side center connector (42), which is located on the central through hole (53).

4. A planar diaphragm loudspeaker of claim 2, wherein The planar thin film (22) has a signal output terminal (48) at the edge of the side near the B-side coil (19). The output terminal of the outer ring of the B-side coil (19) is connected to the signal output terminal (48). The input terminal of the inner ring of the B-side coil (19) extends to the central through hole (53). The input terminal of the inner ring of the B-side coil (19) has a B-side center connector (47), which is located on the central through hole (53). The B-side center connector (47) and the A-side center connector (42) are electrically connected through the center through hole (53).

5. A planar diaphragm loudspeaker of claim 2, wherein The ratio of the diameter of the embossed film (18) on side B to the diameter of the coil (19) on side B is 1:2~2.5; The ratio of the diameter of the embossed film (24) on side A to the diameter of the coil (21) on side A is 1:2~2.5; The coils (21) on the A side and the coils (19) on the B side of the planar film (22) are matched and correspondingly set, and the embossed films (24) on the A side and the embossed films (18) on the B side of the planar film (22) are matched and correspondingly set.

6. A planar diaphragm loudspeaker of claim 2, wherein The outer shell (11) is provided with a dustproof net (12), a lower bracket (13), a second U-shaped iron (14), and a gasket (17) in sequence. The second U-shaped iron (14) is provided with a second ring magnet (15) and a second circular magnet (16). The gasket (17) is provided on the side of the flat film (22) close to the outer shell (11). The planar film (22) is provided with a membrane ring (23), a first U-shaped iron (28), an upper bracket (27), and a circuit board (29) on the side away from the outer shell (11). The first U-shaped iron (28) is provided with a first ring magnet (26) and a first circular magnet (25). The side of the circuit board (29) close to the planar film (22) is provided with a contact spring (32).

Images