Double-sided circuit plane diaphragm loudspeaker
By setting up symmetrically wired double-sided coils on both sides of the planar diaphragm speaker, the problem of uneven force on the diaphragm is solved, the sensitivity and sound field width are improved, and a better signal enhancement effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional planar diaphragm speakers suffer from uneven force distribution on the diaphragm, resulting in insufficient driving area and sound pressure level, narrow signal coverage path, insufficient sound field width, low sound separation, and insufficient sensitivity.
The design employs a double-sided coil and double-sided symmetrical wiring, with A-side and B-side coils on both sides of the diaphragm. The circuits are superimposed and the signal paths are consistent, achieving double-sided symmetrical wiring, which improves the uniformity of force on the diaphragm and the signal enhancement effect.
The double-sided symmetrical wiring design improves the diaphragm's sensitivity and sound field width, achieving a more uniform force distribution and better signal enhancement.
Smart Images
Figure CN224097839U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of loudspeaker technology, and in particular to a planar diaphragm loudspeaker with double-sided coils and double-sided symmetrical balanced wiring. Background Technology
[0002] A planar magnetic horn uses conductor wires laid out 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. Traditional planar magnetic horns often use single-sided wiring. Because the conductor wires are only placed on one side of the diaphragm, the force distribution on the diaphragm is uneven, affecting the driving area and sound pressure level. The low utilization rate of the diaphragm wiring area results in a narrow signal coverage path, insufficient sound field width, poor signal enhancement, insufficient sensitivity, and low sound separation, all of which need improvement. 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 double-sided coils and double-sided symmetrical wiring. The double-sided coil wiring superposition design improves the diaphragm sensitivity.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A double-sided planar diaphragm loudspeaker includes a diaphragm; one side of the diaphragm is provided with an A-side coil, and the other side of the diaphragm is provided with a B-side coil;
[0006] The A-side coil has an A-side signal input terminal and an A-side signal output terminal on the side away from the diaphragm. The A-side signal input terminal and the A-side signal output terminal are arranged opposite each other. An A-side signal lead-out terminal is provided on one side between the A-side signal input terminal and the A-side signal output terminal. The A-side signal lead-out terminal is located on the side edge of the A-side coil.
[0007] The coil on side A is provided with a loop section on the edge of side A, and the signal input terminal on side A is located close to the inner side of the loop section on the edge of side A.
[0008] The edge loop section of surface A includes an edge trace. The edge trace is led out from the signal input terminal of surface A. After being bent, the edge trace extends inward in a U-shaped line and returns to the edge loop section of surface A to form a loop circuit. The tail end of the edge loop section of surface A is connected to the small loop section of surface A, and the tail end of the small loop section of surface A is connected to the signal output terminal of surface A.
[0009] The B-side coil is provided with a B-side signal input terminal that matches the A-side signal output terminal on the A-side coil. The B-side signal input terminal and the A-side signal output terminal are connected in close proximity. The B-side coil is also provided with a B-side signal output terminal that matches the A-side signal output terminal on the A-side coil. The B-side signal output terminal and the A-side signal output terminal are connected in close proximity.
[0010] The circuits of the A-side coil (front coil) and the B-side coil (reverse coil) are arranged in a double-sided symmetrical layout. The circuits of the A-side coil and the B-side coil are superimposed and arranged in an overlapping manner. The A-side coil and the B-side coil form a double-sided symmetrical coil. The signal paths of the double-sided symmetrical coil are consistent and have the same direction.
[0011] Furthermore, in some embodiments, the far end of the large loop of the last U-shaped line of the edge loop section of the A-side is connected to the outer arc trace of the small loop section of the A-side. The outer arc trace extends in an arc shape close to the edge loop section of the A-side and then bends to extend inward in a U-shaped line. The tail end of the small loop section of the A-side is connected to the signal lead-out terminal of the A-side.
[0012] Furthermore, in some embodiments, the bottom of the U-shaped line of the edge loop section of surface A is provided with a far-end bend of the large loop of surface A. The far-end bend of the large loop of surface A is connected to the near-end bend of the large loop of surface A through an extension line. The edge loop section of surface A is provided with a U-shaped line that matches the small loop section of surface A. The edge loop section of surface A returns to the edge trace through the far-end bend of the large loop of surface A on the U-shaped line to form a loop circuit. The edge loop section of surface A is provided with 2 to 4 loop circuits, and the tail end of the innermost edge trace is connected to the signal lead-out terminal of surface A.
[0013] Furthermore, in some embodiments, the A-side coil is provided with an A-side small loop section, and the A-side signal lead-out terminal is located close to the inner side of the A-side small loop section; the tail end of the A-side edge loop section is connected to an outer arc trace, and the outer arc trace is bent and extends inward in a U-shaped line, returning to the A-side small loop section to form a loop; the tail end of the A-side small loop section is connected to the A-side signal lead-out terminal.
[0014] Furthermore, in some embodiments, the outer arc trace is connected to the far end bend of the A-side small loop at the bottom of the U-shaped line through a line extension section, and the top of the U-shaped line is provided with a near end bend of the A-side small loop. The far end bend of the A-side small loop is connected to the near end bend of the A-side small loop through a line extension section, and 2 to 4 connected U-shaped lines are arranged in sequence. The far end bend of the A-side small loop on the rear U-shaped line returns to the outer arc trace to form a loop of the A-side small loop section. The A-side small loop section is provided with 3 to 5 loops.
[0015] The arc length of the outer arc trace is 1 / 6 to 1 / 4 of the arc length of the circular ring;
[0016] The last U-shaped line of the small loop section on side A is connected to the signal lead-out terminal on side A via an outer arc trace.
[0017] Furthermore, in some embodiments, the circuits on both sides of the B-side coil and the A-side coil are symmetrically arranged, the circuits on the B-side coil and the A-side coil are overlapped, and the circuits on the B-side coil and the A-side coil are connected in series.
[0018] Furthermore, in some embodiments, a diaphragm ring is provided on the side of the A-side coil away from the diaphragm, and an A-magnet group, an A-magnet sheet, and an A-support are sequentially provided outward from the side of the diaphragm ring away from the A-side coil. A circuit board and a tuning mesh are provided on the outer side of the A-support away from the A-side coil.
[0019] Furthermore, in some embodiments, the side of the A-side coil facing the A-bracket is provided with an A-side signal input terminal and an A-side signal output terminal. The A-bracket is provided with through holes that match the A-side signal input terminal and the A-side signal output terminal. The side of the circuit board near the A-bracket is provided with a spring guide post. After passing through the through hole of the A-bracket, the spring guide post is tightly connected to the A-side signal input terminal and the A-side signal output terminal on the A-side coil.
[0020] Furthermore, in some embodiments, a gasket is provided on the side of the B-side coil away from the diaphragm, and a B magnet assembly, a B magnetic sheet, a B bracket, and a dustproof mesh are sequentially arranged outward from the side of the gasket away from the B-side coil. An outer shell is provided on the outer side of the dustproof mesh away from the B-side coil, and the outer shell covers the components from the dustproof mesh to the tuning mesh.
[0021] The symmetrical double-sided coil circuit overlapping wiring feature of this utility model:
[0022] The diaphragm employs a double-sided coil symmetrical wiring design. After the double-sided coils are combined, the signal output terminal on side A is adjacent to and connected to the signal input terminal on side B, and the signal output terminal on side B is adjacent to and connected to the signal output terminal on side A. This ensures that all signal terminals of the diaphragm are on the coil on side A. The signal input and output terminals on the coil on side A are connected to the circuit board. The signal paths of the superimposed double-sided coils are identical, achieving a signal enhancement effect. This invention improves the uniformity of diaphragm stress, sensitivity, and sound field width through a double-sided symmetrical balanced wiring layout. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;
[0024] Figure 2 This is a structural diagram of the combined double-sided coil according to an embodiment of this application;
[0025] Figure 3 This is a schematic diagram of the assembly of a double-sided coil according to an embodiment of this application;
[0026] Figure 4 This is a schematic diagram of the electrical signals of the small circulation section on surface A in an embodiment of this application;
[0027] Figure 5 This is a schematic diagram of the electrical signals of the edge loop portion of surface A in an embodiment of this application;
[0028] Figure 6 This is a comparison chart of signal sensitivity.
[0029] Explanation of reference numerals in the attached figures:
[0030] 11. Outer shell, 12. Dustproof mesh, 13. B bracket, 14. B magnetic sheet, 15. B magnet assembly, 16. Gasket, 18. Diaphragm ring, 19. A magnet assembly, 21. A magnetic sheet, 22. A bracket, 23. Spring guide post, 24. Circuit board, 26. Tuning mesh, 27. A-side coil, 30. A-side signal input terminal, 31. A-side signal output terminal, 32. A-side signal lead-out terminal, 33. A-side small loop section, 34. A-side edge loop section, 35. Outer arc trace, 36. A-side small loop far end bend section, 37. A-side small loop near end bend section, 38. Edge trace, 39. B-side coil, 40. B-side signal input terminal, 41. B-side signal lead-out terminal, 42. A-side large loop far end bend section, 46. A-side large loop near end bend section, 47. Detailed Implementation
[0031] 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.
[0032] 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.
[0033] Referring to the attached figures, this application includes a diaphragm 18, one side of which is provided with an A-side coil 30 (front coil), and the other side of which is provided with a B-side coil 40 (reverse coil). On the side of the A-side coil 30 away from the diaphragm 18, there is a diaphragm ring 19. On the side of the diaphragm ring 19 away from the A-side coil 30, there are sequentially arranged an A-magnet assembly 21, an A-magnetic sheet 22, and an A-support 23. On the outer side of the A-support 23 away from the A-side coil 30, there are a circuit board 26 and a tuning mesh 27.
[0034] The A-side coil 30 facing the A-side bracket 23 has an A-side signal input terminal 31 and an A-side signal output terminal 32. The A-side bracket 23 has through holes that match the A-side signal input terminal 31 and the A-side signal output terminal 32. The circuit board 26 has a spring guide post 24 on the side close to the A-side bracket 23. The spring guide post 24 passes through the through hole of the A-side bracket 23 and is tightly connected to the A-side signal input terminal 31 and the A-side signal output terminal 32 on the A-side coil 30.
[0035] A pad 16 is provided on the side of the B-side coil 40 away from the diaphragm 18. On the side of the pad 16 away from the B-side coil 40, a B magnet group 15, a B magnetic sheet 14, a B bracket 13, and a dustproof net 12 are arranged outward in sequence. A housing 11 is provided on the outer side of the dustproof net 12 away from the B-side coil 40. The housing 11 covers the components from the dustproof net 12 to the tuning net 27.
[0036] Furthermore, in one embodiment, the side of the A-side coil 30 away from the diaphragm 18 is provided with an A-side signal input terminal 31 and an A-side signal output terminal 32, with the A-side signal input terminal 31 and the A-side signal output terminal 32 arranged opposite to each other. An A-side signal lead-out terminal 33 is provided on one side between the A-side signal input terminal 31 and the A-side signal output terminal 32, and the A-side signal lead-out terminal 33 is located on the side edge of the A-side coil 30. An A-side edge loop portion 35 is provided on the A-side coil 30, and the A-side signal input terminal 31 is arranged adjacent to the inner side of the A-side edge loop portion 35.
[0037] The edge loop section 35 of surface A includes an edge trace 39. The edge trace 39 is led out from the signal input terminal 31 of surface A. After being bent, the edge trace 39 extends inward in a U-shaped line and returns to the edge loop section 35 of surface A to form a loop circuit. The tail end of the edge loop section 35 of surface A is connected to the small loop section 34 of surface A, and the tail end of the small loop section 34 of surface A is connected to the signal output terminal 33 of surface A.
[0038] Furthermore, in one embodiment, the B-side coil 40 is provided with a B-side signal input terminal 41 that matches the A-side signal output terminal 33 on the A-side coil 30, and the B-side signal input terminal 41 and the A-side signal output terminal 33 are connected in close proximity; the B-side coil 40 is provided with a B-side signal output terminal 42 that matches the A-side signal output terminal 32 on the A-side coil 30, and the B-side signal output terminal 42 and the A-side signal output terminal 32 are connected in close proximity.
[0039] The circuits of coil 30 on side A and coil 40 on side B are arranged in a double-sided symmetrical layout. The circuits of coil 30 on side A and coil 40 on side B are superimposed and arranged in an overlapping manner. The circuits of coil 30 on side A and coil 40 on side B form a double-sided symmetrical coil. The signal paths of the double-sided symmetrical coils are consistent and have the same direction.
[0040] Furthermore, in one embodiment, the far end bend 46 of the last U-shaped line of the A-side edge loop 35 is connected to the outer arc trace 36 of the A-side small loop 34. The outer arc trace 36 extends in an arc shape close to the A-side edge loop 35 and then bends to extend inward in a U-shaped line. The tail end of the A-side small loop 34 is connected to the A-side signal lead-out terminal 33.
[0041] The bottom of the U-shaped line of the edge loop section 35 of surface A is provided with a far-end return section 46 of the large loop of surface A. The far-end return section 46 of the large loop of surface A is connected to the near-end return section 47 of the large loop of surface A through an extension line. The edge loop section 35 of surface A is provided with a U-shaped line that matches the small loop section 34 of surface A. The edge loop section 35 of surface A returns to the edge trace 39 through the far-end return section 46 of the large loop of surface A on the U-shaped line to form a loop circuit. The edge loop section 35 of surface A is provided with 2 to 4 loop circuits. The tail end of the innermost edge trace 39 is connected to the signal lead-out terminal 33 of surface A.
[0042] The A-side coil 30 is provided with an A-side small loop section 34, and the A-side signal lead-out terminal 33 is located close to the inner side of the A-side small loop section 34; the tail end of the A-side edge loop section 35 is connected to the outer arc trace 36, and the outer arc trace 36 is bent and extends inward in a U-shaped line, returning to the A-side small loop section 34 to form a loop; the tail end of the A-side small loop section 34 is connected to the A-side signal lead-out terminal 33.
[0043] Furthermore, in one embodiment, the outer arc trace 36 is connected to the far end bend section 37 of the A-side small loop at the bottom of the U-shaped line via a line extension section. The top of the U-shaped line is provided with a near end bend section 38 of the A-side small loop. The far end bend section 37 of the A-side small loop and the near end bend section 38 of the A-side small loop are connected via a line extension section, and 2 to 4 connected U-shaped lines are arranged in sequence. The far end bend section 37 of the A-side small loop on the rear U-shaped line returns to the outer arc trace 36 to form a loop of the A-side small loop section 34. The A-side small loop section 34 is provided with 3 to 5 loops.
[0044] The outer arc trace has an arc length of 36 arcs, which is 1 / 6 to 1 / 4 of the arc length of the circular ring.
[0045] The last U-shaped loop of the small loop section 34 on side A is connected to the signal lead-out terminal 33 on side A via the outer arc trace 36.
[0046] The circuits of the B-side coil 40 and the A-side coil 30 are symmetrically arranged. The circuits of the B-side coil 40 and the A-side coil 30 are overlapped and connected in series.
[0047] After the double-sided coils are combined, the A-side signal lead-out terminal 33 and the B-side signal lead-in terminal 41 are connected in close proximity, and the B-side signal lead-out terminal 42 and the A-side signal output terminal 32 are connected in close proximity, so that the signal terminals of the diaphragm 18 are all on the A-side coil 30, and the A-side signal input terminal 31 and the A-side signal output terminal 32 on the A-side coil 30 are connected to the circuit board 26.
[0048] The curve of this application (sensitivity of this application): The initial sensitivity is 121 dB, and the curve was obtained by testing the cross-symmetrical lead wire diaphragm of this application;
[0049] Existing product curve (existing product sensitivity): The initial sensitivity is 113.5 dB, which is the curve obtained from testing existing single-sided wire diaphragm products.
[0050] The average sensitivity of this application is improved by 7 to 8 dB compared with existing products.
[0051] 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 double-sided planar diaphragm loudspeaker, comprising: Diaphragm (18); characterized in that, one side of the diaphragm (18) is provided with an A-side coil (30), and the other side of the diaphragm (18) is provided with a B-side coil (40); The A-side coil (30) away from the diaphragm (18) is provided with an A-side signal input terminal (31) and an A-side signal output terminal (32). The A-side signal input terminal (31) and the A-side signal output terminal (32) are arranged opposite to each other. An A-side signal lead-out terminal (33) is provided on one side between the A-side signal input terminal (31) and the A-side signal output terminal (32). The A-side signal lead-out terminal (33) is located on the side edge of the A-side coil (30). The A-side coil (30) is provided with an A-side edge circulation section (35), and the A-side signal input terminal (31) is located close to the inner side of the A-side edge circulation section (35); The edge loop section (35) of surface A includes an edge trace (39). The edge trace (39) is led out from the signal input terminal (31) of surface A. After the edge trace (39) is bent, it extends inward in a U-shaped line and returns to the edge loop section (35) of surface A to form a loop circuit. The tail end of the edge loop section (35) of surface A is connected to the small loop section (34) of surface A. The tail end of the small loop section (34) of surface A is connected to the signal output terminal (33) of surface A. The B-side coil (40) is provided with a B-side signal input terminal (41) that matches the A-side signal output terminal (33) on the A-side coil (30). The B-side signal input terminal (41) and the A-side signal output terminal (33) are connected in close proximity. The B-side coil (40) is provided with a B-side signal output terminal (42) that matches the A-side signal output terminal (32) on the A-side coil (30). The B-side signal output terminal (42) and the A-side signal output terminal (32) are connected in close proximity. The circuits of coil A (30) and coil B (40) are arranged in a double-sided symmetrical layout. The circuits of coil A (30) and coil B (40) are superimposed and arranged in an overlapping manner. The circuits of coil A (30) and coil B (40) form a double-sided symmetrical coil. The signal paths of the double-sided symmetrical coils are consistent and have the same direction.
2. The double-sided planar diaphragm speaker according to claim 1, characterized in that, The last U-shaped line of the edge loop section (35) of the A-side is connected to the outer arc trace (36) of the small loop section (34) of the A-side. The outer arc trace (36) extends in an arc shape close to the edge loop section (35) of the A-side and then bends to extend inward in a U-shaped line. The tail end of the small loop section (34) of the A-side is connected to the signal lead-out terminal (33) of the A-side.
3. A double-sided planar diaphragm loudspeaker according to claim 2, characterized in that, The bottom of the U-shaped line of the edge circulation section (35) of surface A is provided with a far-end return section (46) of the large loop of surface A. The far-end return section (46) of the large loop of surface A is connected to the near-end return section (47) of the large loop of surface A through an extension line. The edge circulation section (35) of surface A is provided with a U-shaped line that matches the small circulation section (34) of surface A. The edge circulation section (35) of surface A returns to the edge trace (39) through the far-end return section (46) of the large loop of surface A on the U-shaped line to form a loop circuit. The edge circulation section (35) of surface A is provided with 2 to 4 loop circuits. The tail end of the innermost edge trace (39) is connected to the signal lead-out terminal (33) of surface A.
4. A double-sided planar diaphragm loudspeaker according to claim 2, characterized in that, The A-side coil (30) is provided with an A-side small loop section (34), and the A-side signal lead-out end (33) is located close to the inner side of the A-side small loop section (34); the tail end of the A-side edge loop section (35) is connected to the outer arc trace (36), and the outer arc trace (36) extends inward in a U-shaped line after bending, returning to the A-side small loop section (34) to form a loop; the tail end of the A-side small loop section (34) is connected to the A-side signal lead-out end (33).
5. A double-sided planar diaphragm loudspeaker according to claim 4, characterized in that, The outer arc trace (36) is connected to the far end bend of the A-side small loop at the bottom of the U-shaped line through the line extension section. The top of the U-shaped line is provided with the near end bend of the A-side small loop (38). The far end bend of the A-side small loop (37) and the near end bend of the A-side small loop (38) are connected through the line extension section. Two to four connected U-shaped lines are set in sequence. The far end bend of the A-side small loop (37) on the rear U-shaped line returns to the outer arc trace (36) to form a loop of the A-side small loop section (34). The A-side small loop section (34) is provided with 3 to 5 loops. The arc length of the outer arc trace (36) is 1 / 6 to 1 / 4 of the arc length of the circular ring; The last U-shaped line of the small loop section (34) on the A-side is connected to the signal lead-out terminal (33) on the A-side through the outer arc trace (36).
6. A double-sided planar diaphragm loudspeaker according to claim 1, characterized in that, The B-side coil (40) and the A-side coil (30) are symmetrically arranged with double-sided circuits. The circuits of the B-side coil (40) and the A-side coil (30) are overlapped and connected in series.
7. A double-sided planar diaphragm loudspeaker according to claim 1, characterized in that, The A-side coil (30) is provided with a diaphragm ring (19) on the side away from the diaphragm (18). On the side of the diaphragm ring (19) away from the A-side coil (30), an A magnet group (21), an A magnetic sheet (22), and an A bracket (23) are arranged outward in sequence. On the outer side of the A bracket (23) away from the A-side coil (30), a circuit board (26) and a tuning mesh (27) are arranged.
8. A double-sided planar diaphragm loudspeaker according to claim 7, characterized in that, The A-side coil (30) facing the A-side bracket (23) is provided with an A-side signal input terminal (31) and an A-side signal output terminal (32). The A-side bracket (23) is provided with through holes that match the A-side signal input terminal (31) and the A-side signal output terminal (32). The circuit board (26) is provided with a spring guide post (24) on the side close to the A-side bracket (23). The spring guide post (24) passes through the through hole of the A-side bracket (23) and is tightly connected to the A-side signal input terminal (31) and the A-side signal output terminal (32) on the A-side coil (30).
9. A double-sided planar diaphragm loudspeaker according to claim 1, characterized in that, A pad (16) is provided on the side of the B-side coil (40) away from the diaphragm (18). On the side of the pad (16) away from the B-side coil (40), a B magnet group (15), a B magnetic sheet (14), a B bracket (13), and a dustproof net (12) are arranged outward in sequence. A shell (11) is provided on the outer side of the dustproof net (12) away from the B-side coil (40). The shell (11) covers the components from the dustproof net (12) to the tuning net (27).