Dual-tone dual-diaphragm pneumatic tweeter

Abstract

The present invention relates to the field of loudspeaker technology, and provides a dual-tone dual-diaphragm pneumatic tweeter, comprising: a main structure, the main structure comprising panel one, panel two, a magnetic ring, sound diaphragm one and sound diaphragm two, panel one and panel two both having sound holes, the magnetic ring fixedly mounted between panel two and panel one, sound diaphragm one encapsulated between panel one and the magnetic ring, sound diaphragm two encapsulated between panel two and the magnetic ring, a closed space formed between sound diaphragm two and sound diaphragm one, air in the closed space, the main structure further comprising a damping plate, the damping plate fixedly mounted inside the magnetic ring, and the damping plate made of wool felt. The dual-tone dual-diaphragm pneumatic tweeter provided by the present invention broadens the operating frequency range of the pneumatic tweeter, effectively improves the nonlinear harmonic distortion of the sound diaphragm, and the damping plate arranged between sound diaphragm one and sound diaphragm two solves the problem that mechanical damping is difficult to solve with a single diaphragm, thus solving a difficult problem in the industry.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a dual-tone dual-membrane pneumatic tweeter. Background Art

[0002] A speaker is actually a device that converts electrical energy into sound. When different electronic energies are transmitted to the coil, the coil generates energy that interacts with the magnetic field of the magnet. This interaction causes the paper plate to vibrate. Because the electronic energy changes at any time, the coil of the speaker will move forward or backward, so the paper plate of the speaker will move with it. This action causes the density of the air to change and produce sound.

[0003] The current pneumatic tweeters have a small operating frequency range, the nonlinear harmonic distortion of the sound diaphragm is relatively serious, and the problem of mechanical damping is difficult to solve with a single diaphragm, which also causes problems in the industry.

[0004] Therefore, a dual-tone dual-membrane pneumatic tweeter is proposed. Summary of the Invention

[0005] The present invention provides a dual-tone dual-diaphragm pneumatic tweeter with the purpose of broadening the operating frequency range of the pneumatic tweeter, effectively improving the nonlinear harmonic distortion of the sound membrane, solving the problem of mechanical damping that a single diaphragm is difficult to solve, and breaking the industry's difficult problems.

[0006] The specific technical solutions are as follows:

[0007] A dual-tone dual-diaphragm pneumatic tweeter, comprising:

[0008] The main structure includes panel one, panel two, a magnetic ring, sound membrane one and sound membrane two. Both panel one and panel two are provided with sound holes. The magnetic ring is fixedly installed between panel two and panel one. The sound membrane one is encapsulated between panel one and the magnetic ring. The sound membrane two is encapsulated between panel two and the magnetic ring. A closed space is formed between the sound membrane two and the sound membrane one, and there is air in the closed space.

[0009] As a preferred solution of the present invention, the main structure further includes a damping plate, which is fixedly installed inside the magnetic ring and is made of wool felt.

[0010] As a preferred solution of the present invention, the second sound membrane and the first sound membrane are symmetrically distributed on both sides of the damping plate.

[0011] As a preferred solution of the present invention, the second sound membrane and the first sound membrane both have positive and negative connecting lines, and the positive and negative connecting lines both extend to the outside of the main structure.

[0012] As a preferred solution of the present invention, a wire threading groove for passing the positive and negative electrode connecting wires is provided on the inner side surface of the panel 1 and the inner side surface of the panel 2.

[0013] As a preferred solution of the present invention, the panel 1 and the panel 2 are both made of plastic, and the panel 1 and the panel 2 are both circular.

[0014] As a preferred solution of the present invention, the center positions of the panel 1 and the panel 2 both form a trumpet-shaped depression toward the magnetic ring.

[0015] As a preferred solution of the present invention, the sound holes are distributed in the trumpet-shaped recesses, and the sound holes in each trumpet-shaped recess are arranged at equal angles in a circumferential direction.

[0016] As a preferred solution of the present invention, the magnetic ring is made of magnetic steel.

[0017] As a preferred solution of the present invention, the structures of the panel 1 and the panel 2 are completely identical, and the structures of the sound membrane 1 and the sound membrane 2 are completely identical.

[0018] The present invention has the following beneficial effects:

[0019] 1. The first and second diaphragms are integrated into one by an airbag-type enclosed space, which enhances the structural strength of the diaphragm, reduces the split vibration of the diaphragm and reduces harmonic distortion. This airbag-type enclosed space structure improves the structural strength of the diaphragm without increasing the resonant frequency of the diaphragm, and may even reduce the resonant frequency of the diaphragm, thereby widening the operating frequency range of the pneumatic tweeter.

[0020] 2. Use the air damping of the airbag-type enclosed space to improve the nonlinear harmonic distortion of the sound membrane;

[0021] 3. The sound diaphragms 1 and 2 of this airbag-type closed space structure are symmetrically arranged back to back. In push-pull operation, they can offset the nonlinear distortion caused by the asymmetric shapes of the two sound diaphragms, thereby achieving the effect of improving harmonic distortion.

[0022] 4. In this airbag-type closed space structure, a mechanical damping material, namely a damping plate, is arranged between the sound diaphragm 1 and the sound diaphragm 2. By selecting the damping plate made of wool felt and the number thereof, the damping effect of the pneumatic diaphragm can be adjusted, thereby further improving the nonlinear harmonic distortion of the diaphragm during operation. The damping plate arranged between the sound diaphragm 1 and the sound diaphragm 2 solves the problem that a single diaphragm is difficult to solve with mechanical damping. It can be said that the industry's difficult problems have been solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a dual-tone dual-diaphragm pneumatic tweeter provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the exploded structure of a dual-tone dual-diaphragm pneumatic tweeter provided in an embodiment of the present invention;

[0025] Figure 3 A schematic front view of the structure of a dual-tone dual-diaphragm pneumatic tweeter provided in an embodiment of the present invention;

[0026] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along AA;

[0027] Figure 5 A schematic structural diagram of a panel 1 of a dual-tone dual-diaphragm pneumatic tweeter provided in an embodiment of the present invention;

[0028] Figure 6 A frequency variation diagram of a single-tone diaphragm operating mode of a dual-tone dual-diaphragm pneumatic tweeter provided by an embodiment of the present invention;

[0029] Figure 7 A frequency variation diagram of the dual-tone dual-diaphragm pneumatic tweeter in a positive push-pull working mode provided by an embodiment of the present invention;

[0030] Figure 8 A frequency variation diagram of a dual-tone dual-diaphragm pneumatic tweeter in a push-pull reverse working mode provided by an embodiment of the present invention;

[0031] Figure 9 A comparison chart showing the improvement in harmonic distortion of the dual-tone dual-diaphragm pneumatic tweeter provided by an embodiment of the present invention.

[0032] In the attached figure:

[0033] 1. Panel 1; 2. Panel 2; 3. Magnetic ring; 4. Damping plate; 5. Sound diaphragm 1; 6. Sound diaphragm 2; 7. Sound hole; 8. Wire threading groove. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0036] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] In the description of the present invention, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0038] The embodiment of the present invention provides a dual-tone dual-diaphragm pneumatic tweeter, such as Figure 1-Figure 5 As shown, it includes: a main structure, the main structure includes panel 1, panel 2, magnetic ring 3, sound membrane 1 5 and sound membrane 2 6, panel 1 1 and panel 2 2 are both provided with sound holes 7, the magnetic ring 3 is fixedly installed between panel 2 2 and panel 1, the sound membrane 1 5 is encapsulated between panel 1 1 and the magnetic ring 3, the sound membrane 2 6 is encapsulated between panel 2 2 and the magnetic ring 3, and a closed space is formed between the sound membrane 2 6 and the sound membrane 1 5, and there is air in the closed space.

[0039] Among them, Figures 1-4 As shown, more perfectly, the main structure further includes a damping plate 4, which is fixedly installed inside the magnetic ring 3, and the damping plate 4 is made of wool felt, and the thickness of the damping plate 4 can be determined according to actual process standards.

[0040] The dual-tone dual-diaphragm pneumatic tweeter using the above technical solution is mainly composed of panel 1, panel 2, magnetic ring 3, sound membrane 1 5 and sound membrane 2 6, which makes the dual-tone dual-diaphragm pneumatic tweeter simple in structure and particularly suitable for mass production.

[0041] Its working principle is as follows: a closed space (airbag-like space) is formed between the magnetic ring 3, the sound membrane 1 5 and the sound membrane 2 6. Air (air serves as a medium) is contained in the closed space, so that the sound membrane 1 5 and the sound membrane 2 6 can form a whole through the interaction of the air. During operation, the sound membrane 1 5 and the sound membrane 2 6 can push and pull each other, damp each other, and compensate each other through the air in the closed space.

[0042] At the same time, during operation, the enclosed space structure formed between the magnetic ring 3, the sound membrane 1 5 and the sound membrane 2 6 plays an important role in improving the nonlinear harmonic distortion of the pneumatic tweeter.

[0043] The present invention improves nonlinear harmonic distortion in the following four aspects:

[0044] 1. The first and second diaphragms 5 and 6 are integrated into one by an airbag-type enclosed space, which enhances the structural strength of the diaphragms, reduces the split vibration of the diaphragms, and reduces harmonic distortion. This airbag-type enclosed space structure improves the structural strength of the diaphragms without increasing the resonant frequency of the diaphragms, and may even reduce the resonant frequency of the diaphragms, thereby widening the operating frequency range of the pneumatic tweeter.

[0045] 2. Use the air damping of the airbag-type enclosed space to improve the nonlinear harmonic distortion of the sound membrane;

[0046] 3. The sound diaphragm 1 5 and the sound diaphragm 2 6 of this airbag-type closed space structure are arranged back to back and symmetrically. In push-pull operation, they can offset the nonlinear distortion caused by the asymmetric shapes of the two sound diaphragms, thereby achieving the effect of improving harmonic distortion.

[0047] 4. In this airbag-type closed space structure, a mechanical damping material, namely a damping plate 4, is arranged between the sound diaphragm 1 5 and the sound diaphragm 2 6. By selecting the damping plate 4 made of wool felt and the number thereof, the damping effect of the pneumatic diaphragm can be adjusted, thereby further improving the nonlinear harmonic distortion of the diaphragm during operation.

[0048] The damping plate 4 arranged between the sound diaphragm 1 5 and the sound diaphragm 2 6 solves the problem of mechanical damping that is difficult to solve with a single diaphragm. It can be said that it has solved the difficult problem of the industry.

[0049] It should also be noted that the specific material of the damping plate 4 can be adjusted according to the purpose and application requirements of the speaker, including the material (damping coefficient) and the thickness (quantity and density) of the damping material. In practical applications, this can be flexibly adjusted. In this embodiment, the damping plate 4 is made of wool felt because it has a better damping effect on the pneumatic diaphragm.

[0050] Specifically, in this embodiment:

[0051] 1. Single diaphragm working mode: Only one group of diaphragms (one of the diaphragms 5 and 6) is connected to the circuit to work. When a single diaphragm is working, one group of diaphragms is in an active working state, and the other group of diaphragms is driven to work passively through air coupling in the airbag-type closed space structure. This mode forms a "double resonance peak state". The working frequency range of the diaphragm is relatively wide. One group of diaphragms actively radiates sound, and the other group of diaphragms passively radiates sound, forming an inverted 8-shaped directivity of front and rear radiation, which is characterized by a front radiation sound pressure that is about 6db higher than the rear radiation sound pressure.

[0052] 2. Dual-diaphragm positive push-pull operating mode: In the circuit, two sets of diaphragms (diaphragm one 5 and diaphragm two 6) operate simultaneously in anti-phase (series and parallel). When the dual-diaphragms are in operation, due to the back-to-back arrangement and the anti-phase connection of the circuit, the two diaphragms are in a push-pull vibration state in the same direction. Both are actively working, driving each other in push-pull. This mode forms a "single resonance peak state", but the resonant frequency is lower, the resonance peak is higher, and the output sound pressure is higher. The diaphragm operating frequency range is now the widest, and the output sound pressure is approximately 3dB higher than that of the single-diaphragm mode. Because the dual-diaphragms actively radiate front and back, they also exhibit an inverted 8 directivity. The characteristic is that the front and back radiated sound pressure is the same, but the sound phase is opposite.

[0053] 3. Dual-diaphragm reverse push-pull working mode: In the circuit, two groups of diaphragms (diaphragm one 5 and diaphragm two 6) work simultaneously in phase (the same applies to series and parallel connections). When the dual-diaphragms are working, since the dual-diaphragms are set back to back and the circuit is connected in phase, the dual-diaphragms are in a state of push-pull vibration in opposite directions. Both are actively working and drive each other to push and pull in reverse. This mode also forms a "single resonance peak state", but the resonant frequency is relatively high, and the frequency response curve shifts toward the high frequency direction. At this time, the working frequency range of the diaphragm is narrow, and the output sound pressure is the same as the dual-diaphragm positive push-pull working mode. Since the dual diaphragms actively radiate front and back, they also present an inverted 8-shaped directivity. The characteristics are that the front and rear radiated sound pressure is the same, the frequency response working range is narrow, but the sound phase is the same.

[0054] Specifically, in this embodiment, in order to further improve the nonlinear harmonic distortion of the sound diaphragm 1 5 and the sound diaphragm 2 6 during operation, the sound diaphragm 2 6 and the sound diaphragm 1 5 are symmetrically distributed on both sides of the damping plate 4 .

[0055] Specifically, in this embodiment, Figure 2 As shown, in order to facilitate wiring of the sound membrane 2 6 and the sound membrane 1 5, the sound membrane 2 6 and the sound membrane 1 5 are both provided with positive and negative connecting wires, and the positive and negative connecting wires are both extended to the outside of the main structure for easy wiring through the positive and negative connecting wires.

[0056] Specifically, in this embodiment, Figure 2 As shown, in order to facilitate the lead-out of the positive and negative connecting wires, wire threading grooves 8 for passing the positive and negative connecting wires are provided on the inner side surfaces of panel 1 and panel 2 2.

[0057] Specifically, in this embodiment, Figure 1-4 As shown, in order to eliminate the interference of panel 1 1 and panel 2 2 on sound diaphragm 2 6 and sound diaphragm 1 5, panel 1 1 and panel 2 2 are both made of plastic, and panel 1 1 and panel 2 2 are both circular.

[0058] Specifically, in this embodiment, Figure 2 As shown, in order to improve the sound quality of the dual-tone dual-diaphragm pneumatic tweeter, the center positions of panel 1 and panel 2 2 are both arranged to form a trumpet-shaped depression toward the magnetic ring 3, and the sound holes 7 are all distributed in the trumpet-shaped depressions, and the sound holes 7 in each trumpet-shaped depression are arranged at equal angles in a circular direction.

[0059] Specifically, in this embodiment, in order to improve the performance of the magnetic ring 3, the magnetic ring 3 is made of magnetic steel.

[0060] Specifically, in this embodiment, in order to further improve the nonlinear harmonic distortion of the dual-tone dual-diaphragm pneumatic tweeter during operation, Figure 2 As shown, the structures of panel 1 and panel 2 2 are exactly the same, and panel 1 1 and panel 2 2 are symmetrically arranged, and the structures of sound membrane 1 5 and sound membrane 2 6 are exactly the same, and sound membrane 1 5 and sound membrane 2 6 are symmetrically arranged.

[0061] Specifically, in this embodiment, the performance of the dual-tone dual-membrane pneumatic tweeter provided in this embodiment was tested and the results were as follows:

[0062] Figure 6 A frequency variation diagram of a single-tone diaphragm operating mode of a dual-tone dual-diaphragm pneumatic tweeter provided by an embodiment of the present invention;

[0063] Figure 7 A frequency variation diagram of the dual-tone dual-diaphragm pneumatic tweeter in a positive push-pull working mode provided by an embodiment of the present invention;

[0064] Figure 8 A frequency variation diagram of a dual-tone dual-diaphragm pneumatic tweeter in a push-pull reverse working mode provided by an embodiment of the present invention;

[0065] Figure 9 A comparison chart showing the improvement in harmonic distortion of the dual-tone dual-diaphragm pneumatic tweeter provided by an embodiment of the present invention.

[0066] pass Figure 6-Figure 9 The data shown show that the dual-tone dual-diaphragm pneumatic tweeter provided in this embodiment has the following advantages:

[0067] 1. The first and second diaphragms 5 and 6 are integrated into one by an airbag-type enclosed space, which enhances the structural strength of the diaphragms, reduces the split vibration of the diaphragms, and reduces harmonic distortion. This airbag-type enclosed space structure improves the structural strength of the diaphragms without increasing the resonant frequency of the diaphragms, and may even reduce the resonant frequency of the diaphragms, thereby widening the operating frequency range of the pneumatic tweeter.

[0068] 2. Use the air damping of the airbag-type enclosed space to improve the nonlinear harmonic distortion of the sound membrane;

[0069] 3. The sound diaphragm 1 5 and the sound diaphragm 2 6 of this airbag-type closed space structure are arranged back to back and symmetrically. In push-pull operation, they can offset the nonlinear distortion caused by the asymmetric shapes of the two sound diaphragms, thereby achieving the effect of improving harmonic distortion.

[0070] 4. In this airbag-type closed space structure, a mechanical damping material, namely a damping plate 4, is arranged between the sound diaphragm 1 5 and the sound diaphragm 2 6. By selecting the damping plate 4 made of wool felt and the number thereof, the damping effect of the pneumatic diaphragm can be adjusted, thereby further improving the nonlinear harmonic distortion of the diaphragm during operation. The damping plate 4 arranged between the sound diaphragm 1 5 and the sound diaphragm 2 6 solves the problem that a single diaphragm is difficult to solve mechanical damping. It can be said that the industry's problem has been solved.

[0071] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-tone dual-diaphragm pneumatic tweeter, characterized in that: include: The main structure includes a panel 1, a panel 2, a magnetic ring, a sound diaphragm 1, and a sound diaphragm 2. The panel 1 and the panel 2 are both provided with sound holes. The magnetic ring is fixedly installed between the panel 2 and the panel 1. The sound diaphragm 1 is encapsulated between the panel 1 and the magnetic ring. The sound diaphragm 2 is encapsulated between the panel 2 and the magnetic ring. A closed space is formed between the sound diaphragm 2 and the sound diaphragm 1, and air is contained in the closed space. The main structure also includes a damping plate, which is fixedly installed inside the magnetic ring and is made of wool felt; the sound membrane 2 and the sound membrane 1 are symmetrically distributed on both sides of the damping plate; the panel 1 and the panel 2 are both made of plastic, and the panel 1 and the panel 2 are both circular; the center positions of the panel 1 and the panel 2 form a trumpet-shaped depression facing the magnetic ring; the sound holes are all distributed in the trumpet-shaped depressions, and the sound holes in each trumpet-shaped depression are arranged at equal angles in a circular direction; the magnetic ring is made of magnetic steel; the structure of the panel 1 is exactly the same as that of the panel 2, and the structure of the sound membrane 1 is exactly the same as that of the sound membrane 2.

2. The dual-tone dual-diaphragm pneumatic tweeter according to claim 1, characterized in that: The second sound diaphragm and the first sound diaphragm both have positive and negative connecting lines, and the positive and negative connecting lines both extend to the outside of the main structure.

3. The dual-tone dual-diaphragm pneumatic tweeter according to claim 2, characterized in that: The inner side surface of the panel 1 and the inner side surface of the panel 2 are both provided with threading grooves for passing the positive and negative electrode connecting wires.

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