Multi-stacked electrostatic loudspeaker

Abstract

The invention discloses a multi-stacked electrostatic loudspeaker, and belongs to the technical field of loudspeakers. A multi-stacked electrostatic loudspeaker comprises a shell, a supporting frame, a bias power supply and an audio signal amplifier are arranged in the shell, a vibrating diaphragm assembly and an electrode plate are arranged on the supporting frame, the vibrating diaphragm assembly and the electrode plate form an electrostatic unit, the bias power supply provides stable high-voltage direct current for the electrode plate, and the audio signal amplifier is arranged in the shell. The electrode plates are connected with an audio signal amplifier through a signal input interface. According to the multi-stacked electrostatic loudspeaker provided by the invention, the stacked vibrating diaphragm assemblies are arranged, the electrode plates are arranged on the two sides of the vibrating diaphragm assemblies, a plurality of electrostatic units are formed, each electrostatic unit is provided with an independent bias power supply and an independent audio signal amplifier, the working state of each unit is controlled, and better sound performance is realized; by setting different stacking modes, the performance of a traditional electrostatic loudspeaker is remarkably improved, and the requirements in different application scenes are met.

Description

Technical Field

[0001] The invention relates to the technical field of loudspeakers, and in particular to a multi-stacked electrostatic loudspeaker. Background Art

[0002] Although traditional electrostatic speakers can provide high-quality sound output, they are large in size and difficult to miniaturize. In addition, the single-plane diaphragm design limits its sound quality, especially in low-frequency response. In order to overcome these shortcomings, the present invention proposes a design scheme of a multi-stacked electrostatic speaker. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-stacked electrostatic speaker, which forms multiple electrostatic units by arranging stacked diaphragm assemblies. Each electrostatic unit is equipped with an independent bias power supply and audio signal amplifier, which significantly improves the performance of traditional electrostatic speakers, meets the needs of different application scenarios, and solves the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stacked electrostatic speaker, comprising a shell, in which a supporting frame, a bias power supply and an audio signal amplifier are arranged, a diaphragm assembly and an electrode sheet are arranged on the supporting frame, the diaphragm assembly and the electrode sheet constitute an electrostatic unit, the bias power supply provides stable high-voltage direct current to the electrode sheet, the electrode sheet is connected to the audio signal amplifier through a signal input interface, when the audio signal is transmitted to the electrode sheet through the signal input interface, a changing electrostatic field will be formed between the positive electrode plate and the negative electrode plate, and this electrostatic field will cause the middle diaphragm assembly to vibrate, thereby generating sound.

[0005] Preferably, the support frame includes a first connecting frame and a second connecting frame, which are symmetrically arranged and spliced ​​together into a rectangular frame. The first connecting frame and the second connecting frame are made of engineering plastics, aluminum alloys or composite materials, and a connecting block is provided at one end where the first connecting frame and the second connecting frame are connected, and the connecting block is connected by bonding, welding or bolts.

[0006] Preferably, reinforcing ribs are provided on both sides of the first connecting frame and the second connecting frame close to the connecting block, and the reinforcing ribs reinforce the opening positions of the first connecting frame and the second connecting frame, thereby avoiding deformation of the opening positions of the first connecting frame and the second connecting frame and enhancing the stability of the connection between the first connecting frame and the second connecting frame.

[0007] Preferably, the first connecting frame and the second connecting frame are provided with a first card slot and a second card slot on the inner wall, the first card slot is used for plugging in the diaphragm assembly, the second card slot is used for plugging in the electrode sheet, the second card slot is arranged on both sides of the first card slot, each electrostatic unit is composed of a positive electrode plate, a diaphragm assembly and a negative electrode plate, and the first connecting frame and the second connecting frame are provided with heat dissipation holes opposite to the electrode sheet at the end positions.

[0008] Preferably, insulating frames are provided on both sides of the electrode sheet, and the electrode sheet is plugged into the second slot through the insulating frames to improve the tightness of the connection between the electrode sheet and the second slot. At the same time, the insulating frame and the second slot can be fixed by glue to stabilize the position of the electrode sheet.

[0009] Preferably, the electrode sheet is divided into four independent signal segments, each signal segment is separated by an insulating strip, each signal segment is connected to a separate signal input interface, and is driven separately by a multi-channel amplifier to achieve independent control of each diaphragm assembly, thereby improving sound quality and frequency response range.

[0010] Preferably, the diaphragm assembly includes a diaphragm body and a supporting frame. The edge of the diaphragm body is provided with a supporting frame. The supporting frame plays a role in supporting the diaphragm body to prevent the diaphragm body from deformation. The supporting frame is plugged into the first card slot and bonded with glue to improve the stability of the diaphragm assembly.

[0011] Preferably, the support frame includes a splicing frame and a flexible connector. The splicing frames are spliced ​​to form a rectangular structure. A flexible connector is arranged at the center of the splicing frame. A first card slot and a second card slot are opened on the splicing frame. The diaphragm assembly and the electrode sheet are respectively plugged into the first card slot and the second card slot.

[0012] Preferably, the flexible connector is a cross-shaped insulating material used to separate and fix the diaphragm assembly and the electrode sheet. A short rod plugged into the flexible connector is provided at the splicing interface of the splicing frame to fix the position of the flexible connector. Inclined reinforcing ribs are provided at the two corners of the splicing frame.

[0013] Preferably, the shell is provided with a vent hole, which facilitates the flow of gas inside and outside the shell. Compared with the prior art, the beneficial effects of the present invention are:

[0014] The present invention proposes a multi-stacked electrostatic loudspeaker, which forms a plurality of electrostatic units by arranging stacked diaphragm assemblies with a certain distance between the diaphragm assemblies and electrode sheets on both sides of the diaphragm assemblies. A supporting frame fixes the electrode sheets and the diaphragm assemblies. Each electrostatic unit is equipped with an independent bias power supply and audio signal amplifier. This can more accurately control the working state of each unit and achieve better sound performance. By setting different stacking methods, the performance of traditional electrostatic loudspeakers is significantly improved to meet the needs of different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall structural diagram of a multi-stacked electrostatic loudspeaker according to Embodiment 1 of the present invention;

[0016] Figure 2 This is a diagram showing the internal structure of a multi-stacked electrostatic speaker according to a first embodiment of the present invention;

[0017] Figure 3 This is a partial exploded view of a support frame, a diaphragm assembly and an electrode sheet of Embodiment 1 of the present invention;

[0018] Figure 4 This is a structural diagram of a common electrode sheet according to a first embodiment of the present invention;

[0019] Figure 5 This is a structural diagram of the support frame, diaphragm assembly and electrode sheet connection of Embodiment 2 of the present invention;

[0020] Figure 6 For the present invention Figure 5 Partial exploded view;

[0021] Figure 7 This is a structural diagram of the support frame, diaphragm assembly and electrode sheet connection according to embodiment 3 of the present invention.

[0022] In the figure: 1. shell; 11. fixing frame; 111. ventilation hole; 12. mesh cover; 2. support frame; 21. first connecting frame; 211. connecting block; 212. reinforcing rib; 213. first slot; 214. second slot; 215. heat dissipation hole; 22. second connecting frame; 23. splicing frame; 231. short rod; 24. flexible connector; 3. diaphragm assembly; 31. diaphragm body; 32. supporting frame; 4. electrode sheet; 41. insulating frame; 42. signal input interface; 43. signal segment; 44. insulating strip; 5. bias power supply; 6. audio signal amplifier. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1:

[0025] In order to solve the problem that the existing single-plane diaphragm design limits its sound quality performance, especially in terms of low-frequency response, please refer to Figure 1-Figure 4 , this embodiment provides the following technical solutions:

[0026] A multi-stacked electrostatic loudspeaker comprises a shell 1, wherein the shell 1 comprises a fixing frame 11 and a mesh cover 12, the mesh covers 12 are arranged on both sides of the fixing frame 11, a support frame 2 is arranged on the fixing frame 11 near the mesh cover 12, a diaphragm assembly 3 and an electrode sheet 4 are arranged on the support frame 2, a bias power supply 5 and an audio signal amplifier 6 are arranged on the side of the fixing frame 11, and the bias power supply 5 provides stable high-voltage direct current for the electrode sheet 4 to ensure the formation of an electrostatic field.

[0027] The support frame 2 includes a first connecting frame 21 and a second connecting frame 22, which are symmetrically arranged and spliced ​​together into a rectangular frame. The first connecting frame 21 and the second connecting frame 22 are made of engineering plastics, aluminum alloy or composite materials, and a connecting block 211 is provided at one end where the first connecting frame 21 and the second connecting frame 22 are connected. The connecting block 211 is connected by bonding, welding or bolts. The first connecting frame 21 and the second connecting frame 22 are provided with reinforcing ribs 212 on both sides close to the connecting block 211. The reinforcing ribs 212 reinforce the opening positions of the first connecting frame 21 and the second connecting frame 22, which can avoid deformation of the opening positions of the first connecting frame 21 and the second connecting frame 22 and enhance the stability of the connection between the first connecting frame 21 and the second connecting frame 22.

[0028] The first connecting frame 21 and the second connecting frame 22 have a first card slot 213 and a second card slot 214 on their inner walls. The first card slot 213 is used to plug in the diaphragm assembly 3, and the second card slot 214 is used to plug in the electrode sheet 4. The second card slot 214 is arranged on both sides of the first card slot 213. In the present embodiment, the first card slot 213 and the second card slot 214 are alternately arranged. The electrode sheets 4 on both sides of the diaphragm assembly 3 are a positive electrode and a negative electrode, respectively. Each electrostatic unit is composed of a positive electrode plate, a diaphragm assembly 3 and a negative electrode plate. Adjacent diaphragm assemblies 3 share the electrode sheet 4, which reduces the number of electrode plates, simplifies the structure, reduces the cost, and at the same time maintains efficient electrostatic field formation and diaphragm vibration.

[0029] Insulating frames 41 are provided on both sides of the electrode sheet 4, and the electrode sheet 4 is plugged into the second card slot 214 through the insulating frames 41 to improve the tightness of the connection between the electrode sheet 4 and the second card slot 214. At the same time, the insulating frames 41 and the second card slot 214 can be fixed by glue to stabilize the position of the electrode sheet 4. A signal input interface 42 is provided on one side of the electrode sheet 4, and the signal input interface 42 is connected to the audio signal amplifier 6. When the audio signal is transmitted to the electrode sheet 4 through the signal input interface 42, a changing electrostatic field will be formed between the positive electrode plate and the negative electrode plate. This electrostatic field will cause the middle diaphragm assembly 3 to vibrate, thereby generating sound.

[0030] Adjacent diaphragm assemblies 3 share an electrode sheet 4, which brings certain challenges to the individual control of each diaphragm assembly 3. In order to achieve control of an individual diaphragm assembly 3, in this embodiment, the shared electrode sheet is divided into four independent signal segments 43, and each signal segment 43 is separated by an insulating strip 44. Each signal segment 43 is connected to a separate signal input interface 42, and is driven separately by a multi-channel amplifier to achieve independent control of each diaphragm assembly 3, thereby improving the sound quality and frequency response range.

[0031] The diaphragm assembly 3 includes a diaphragm body 31 and a supporting frame 32. The diaphragm body 31 is made of a thin material with good conductivity, such as polyester film, polyimide, or a plastic film with a conductive coating. The thickness of the diaphragm body 31 is between 5-10μm to ensure that it is thin enough to quickly respond to changes in the electrostatic field. The surface of the diaphragm body 31 is coated with a metal coating, such as aluminum, silver or carbon coating, to improve conductivity and stability. The coating thickness is within one hundred nanometers to ensure conductivity without affecting the flexibility and response speed of the diaphragm. A supporting frame 32 is provided on the edge of the diaphragm body 31. The supporting frame 32 supports the diaphragm body 31 to prevent deformation of the diaphragm body 31. The supporting frame 32 is plugged into the first slot 213 and bonded with glue to improve the stability of the diaphragm assembly 3.

[0032] In a multi-stacked electrostatic speaker, the electrode sheets 4 are stacked and the heat dissipation effect needs to be improved. Heat dissipation holes 215 opposite to the electrode sheets 4 are provided at the end positions of the first connecting frame 21 and the second connecting frame 22. The heat dissipation holes 215 on the first connecting frame 21 and the second connecting frame 22 are positioned relative to each other to facilitate gas flow. Vent holes 111 are provided at the upper and lower ends of the fixing frame 11. The vent holes 111 facilitate the gas flow inside and outside the shell 1. Together with the vent holes 111, the heat dissipation effect of the electrode sheets 4 is improved.

[0033] Working process: three diaphragm assemblies 3 are stacked vertically, and a positive electrode plate and a negative electrode plate are respectively arranged on both sides of each diaphragm assembly 3. The middle electrode plate 4 is arranged alternately with the diaphragm assembly 3. The diaphragm assembly 3 and the electrode plate 4 are inserted into the first card slot 213 and the second card slot 214 corresponding to the first connecting frame 21 in this order and fixed by glue. At the same time, glue is applied to the first card slot 213 and the second card slot 214 of the second connecting frame 22, and the second connecting frame 22 is sleeved on the diaphragm assembly 3 and the electrode plate 4. Then the first connecting frame 21 and the second connecting frame 22 are bonded or welded. The electrode plate 4 is connected to the audio signal amplifier 6 through the signal input interface 42. The bias power supply 5 provides a stable high-voltage direct current to the electrode plate 4 to ensure the formation of an electrostatic field. The installed structure is then wrapped and fixed with the shell 1. It can be used after tuning. When the audio signal is transmitted to the electrode plate 4 through the signal input interface 42, a changing electrostatic field will be formed between the positive electrode plate and the negative electrode plate. This electrostatic field will cause the middle diaphragm assembly 3 to vibrate, thereby generating sound.

[0034] The vertical stacking of three diaphragm assemblies 3 is suitable for applications requiring powerful bass effects, such as home theater systems.

[0035] Embodiment 2:

[0036] See also Figure 5-Figure 6 A multi-stacked electrostatic speaker comprises a housing 1, a support frame 2, a bias power supply 5 and an audio signal amplifier 6 are arranged in the housing 1, a diaphragm assembly 3 and an electrode sheet 4 are arranged on the support frame 2, and the support frame 2 comprises a splicing frame 23 and a flexible connector 24. In this embodiment, the splicing frame 23 is a rectangular structure formed by splicing the splicing frames 23. A flexible connector 24 is arranged at the center of the splicing frame 23. The flexible connector 24 divides the rectangular structure formed by splicing the splicing frames 23 into four pieces, and the distances between each piece are equal. The splicing frame 23 is also provided with a first card slot 213 and a second card slot 214, the diaphragm assembly 3 and the electrode sheet 4 are respectively plugged into the first card slot 213 and the second card slot 214, and the diaphragm assembly 3 and the electrode sheet 4 are fixed to the flexible connector 24. The flexible connector 24 is a cross-shaped insulating material for separating and fixing the diaphragm assembly 3 and the electrode sheet 4. A short rod 231 plugged into the flexible connector 24 is provided at the splicing interface of the splicing frame 23 for fixing the position of the flexible connector 24. Inclined reinforcing ribs 212 are provided at the two corners of the splicing frame 23.

[0037] In this embodiment, electrode sheets 4 are respectively provided on both sides of the diaphragm assembly 3, one is the positive electrode and the other is the negative electrode. The diaphragm assembly 3 and the two electrode sheets 4 constitute an electrostatic unit. The electrode sheet 4 is connected to the audio signal amplifier 6 through the signal input interface 42. Each electrostatic unit is controlled separately. The four electrostatic units are arranged horizontally. Each unit has the same size, which is suitable for desktop use, occupies a small space, has a stylish appearance, and maintains good full-band sound output. The shell 1 in this embodiment can be adjusted as needed.

[0038] Embodiment three:

[0039] See also Figure 7 This embodiment is stacked on the basis of the second embodiment. Four electrostatic units are arranged horizontally on the bottom layer. Vertical stacking is achieved above the four electrostatic units. The method of vertically stacking the diaphragm assembly 3 is the same as that of the first embodiment. Adjacent diaphragm assemblies 3 share the electrode sheet 4, which reduces the number of electrode plates, simplifies the structure, and reduces the cost. At the same time, efficient electrostatic field formation and diaphragm vibration are maintained. The vertical and horizontal stacking methods are combined to form a three-dimensional array speaker. This design not only improves the three-dimensional diffusion of sound, but also increases the design flexibility of the speaker. It is suitable for professional recording studios or high-end music appreciation environments that have extremely high requirements on sound quality.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A multi-stacked electrostatic loudspeaker, comprising a housing (1), characterized in that: The housing (1) is provided with a support frame (2), a bias power supply (5) and an audio signal amplifier (6); a diaphragm assembly (3) and an electrode sheet (4) are provided on the support frame (2); the diaphragm assembly (3) and the electrode sheet (4) constitute an electrostatic unit; the bias power supply (5) provides a stable high-voltage direct current to the electrode sheet (4); and the electrode sheet (4) is connected to the audio signal amplifier (6) via a signal input interface (42).

2. The multi-stacked electrostatic loudspeaker according to claim 1, characterized in that: The support frame (2) comprises a first connection frame (21) and a second connection frame (22); the first connection frame (21) and the second connection frame (22) are symmetrically arranged and assembled together to form a rectangular frame; and a connection block (211) is arranged at one end where the first connection frame (21) and the second connection frame (22) are butt-jointed.

3. The multi-stacked electrostatic loudspeaker according to claim 2, characterized in that: Reinforcing ribs (212) are provided on both sides of the first connecting frame (21) and the second connecting frame (22) close to the connecting block (211).

4. The multi-stacked electrostatic loudspeaker according to claim 3, characterized in that: A first card slot (213) and a second card slot (214) are provided on the inner walls of the first connecting frame (21) and the second connecting frame (22); the second card slot (214) is arranged on both sides of the first card slot (213); and heat dissipation holes (215) opposite to the electrode sheet (4) are provided at the end positions of the first connecting frame (21) and the second connecting frame (22).

5. The multi-stacked electrostatic loudspeaker according to claim 4, characterized in that: Insulating frames (41) are provided on both sides of the electrode sheet (4), and the electrode sheet (4) is plugged into the second card slot (214) via the insulating frames (41).

6. The multi-stacked electrostatic loudspeaker according to claim 5, characterized in that: The electrode sheet (4) is divided into four independent signal segments (43), each signal segment (43) is separated by an insulating strip (44), and each signal segment (43) is connected to a separate signal input interface (42).

7. The multi-stacked electrostatic loudspeaker according to claim 4, characterized in that: The diaphragm assembly (3) comprises a diaphragm body (31) and a supporting frame (32); the edge of the diaphragm body (31) is provided with a supporting frame (32); the supporting frame (32) is plugged into the first card slot (213) and bonded with glue to improve the stability of the diaphragm assembly (3).

8. The multi-stacked electrostatic loudspeaker according to claim 4, characterized in that: The support frame (2) comprises a splicing frame (23) and a flexible connector (24), wherein the flexible connector (24) is arranged at the center of the splicing frame (23), and a first card slot (213) and a second card slot (214) are provided on the splicing frame (23), and the diaphragm assembly (3) and the electrode sheet (4) are respectively plugged into the first card slot (213) and the second card slot (214).

9. The multi-stacked electrostatic loudspeaker according to claim 8, characterized in that: The flexible connector (24) is a cross-shaped insulating material. A short rod (231) plugged into the flexible connector (24) is provided at the splicing interface of the splicing frame (23). Inclined reinforcing ribs (212) are provided at two corners of the splicing frame (23).

10. The multi-stacked electrostatic loudspeaker according to claim 1, characterized in that: The housing (1) is provided with a vent hole (111).

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