Loudspeaker with spherical vibrating diaphragm driven by elastic wire

Abstract

A loudspeaker with a spherical vibrating diaphragm driven by an elastic wire comprises a permanent magnet, a magnetizer, a magnetic core, a voice coil, the vibrating diaphragm and a folding ring, the permanent magnet, the magnetizer and the cross section of the center of the magnetic core form a magnet shaped like a Chinese character'shan ', a cylindrical magnetic field is formed by rotating by 180 degrees around the vertical center of the cross section, the voice coil is inserted into the cylindrical magnetic field, and an elastic wire is arranged on the edge of the upper portion of the voice coil. A circular non-magnetic rigid body surface is arranged inwards and is connected with the voice coil into a whole, a plurality of elastic wires are uniformly fixed upwards on the circular non-magnetic rigid body surface, one end of each elastic wire is fixed on the circular non-magnetic rigid body surface, a plurality of polygonal sub-shells are arranged above the circular non-magnetic rigid body surface, and the other end of each polygonal sub-shell is fixed on the circular non-magnetic rigid body surface. The sub-shells are made of a vibrating diaphragm material, and the adjacent sub-shells are transversely connected through the folding rings; and the other end of the elastic wire penetrates through the transverse binding device and is fixed in the center of the surface of the sub-shell. The invention has the characteristics of many sounding vibration sources, abundant frequency and vivid sound.

Description

Technical Field

[0001] The invention relates to a loudspeaker with a spherical diaphragm driven by elastic wire, belonging to an electroacoustic device among electronic devices. Background Art

[0002] A speaker primarily consists of a permanent magnet, a magnetic conductor, a magnetic core, a voice coil, a diaphragm, a surround, a centering support, a bracket, leads, a dust cover, and a shield. The diaphragm is made of a variety of materials, including a paper cone, plastic, and metal. Speakers primarily use a dynamic coil design, where a voice coil carrying an audio current is placed in a fixed magnetic field, causing it to vibrate. Most current speakers have only one voice coil and one paper cone. This cone can only vibrate in one direction, generating plane sound waves that lack a three-dimensional effect. The cone also has a single resonant frequency, making it difficult to reproduce multi-frequency sound waves and a rich frequency spectrum. Human hearing is highly sensitive. For example, if a person is presented with two sound sources—a speaker and a person—they can easily distinguish the source with their eyes closed. This is because the waves excited in space by human speech resemble spherical waves and have a rich frequency spectrum. In order to realistically present the original sound of the sound source, it is very meaningful to study the approximate spherical waves emitted by the speaker. The main inventor of this application has previously studied "a stereo speaker and its matching microphone CN106954119B, a three-dimensional vibration membrane speaker CN201710336414.5", but it is not enough. Further exploration is needed in terms of electroacoustic realism. Summary of the Invention

[0003] The task of the present invention is to invent a dynamic loudspeaker with a spherical diaphragm, which has rich sound frequencies, good three-dimensional effects and realistic sounds.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a loudspeaker with an elastic wire driving a spherical diaphragm, comprising a permanent magnet, a magnet conductor, a magnetic core, a voice coil, a diaphragm, a folding ring, a centering support plate, a bracket, a lead, and a dust cover. When the permanent magnet, the magnet conductor and the magnetic core are placed horizontally, the vertical cross-section in the center forms a "mountain"-shaped magnet, and rotating 180 degrees about the vertical center of the cross-section forms a cylindrical magnetic field, the voice coil is inserted therein, and one end of the circular centering support plate is connected outwardly at the edge position above the voice coil, and the other end of the centering support plate is connected to the bracket. At the edge position above the voice coil, there is a circular non-magnetic rigid surface connected to the voice coil as a whole. On the circular non-magnetic rigid surface, one end of a plurality of elastic wires is evenly fixed upward, and above the circular non-magnetic rigid surface, there is a bottom-open The circular shell with an opening is made of a diaphragm material, and the circular shell is divided into a number of polygonal shells. The edges of the shells are cut off with the same narrow edges on all sides, so that there are gaps between the shells. The adjacent shells are connected laterally by the folding ring, and the shells and the folding ring constitute a new circular shell with an opening at the bottom; the other end of the elastic wire passes through the transverse restraint device and is fixed to the center of the surface of the shell, and the transverse restraint device is fixed to the sub-bracket, and the sub-bracket is fixed to the bracket; the transverse restraint device is a complete rigid sleeve, or several sections of sleeves are set only at the initial, end and bending positions, or a circular folding ring is set only at the initial, end and bending positions, the elastic wire is fixed at the center of the circular folding ring, and the edge of the circular folding ring is fixed to the sub-bracket. The area and specific gravity of the subshells vary at different locations; the spherical angle of the circular shell formed by the subshells and the folded ring ranges from 20° to 300°; and the elastic wire or the sleeve is made of a non-magnetic alloy material or a wear-resistant and elastic chemical material.

[0005] The principle of the present invention is to divide a spherical shell made of diaphragm material into several polygonal shells. These polygons resemble those of a football or basketball, but can be further divided into smaller areas. Narrow edges are cut off from all four sides of each polygonal shell to allow for the addition of a surround. The added surround maintains the original spherical shell volume. A voice coil carrying an audio signal vibrates within a magnetic field, transmitting this signal to each shell through elastic filaments on the voice coil. These elastic filaments cause the shells to vibrate, and the diaphragm shells produce sound. The areas and specific gravity of the manufactured shells vary at different locations, resulting in different resonant frequencies. This allows each shell to resonate with audio signals of different frequencies, enriching the frequency spectrum of the present invention. Furthermore, the combined vibration wave of the shells forms a point sound source, a spherical wave, which is much stronger than a surface sound source driven by a single voice coil in a single direction. The spherical angle of the circular shell formed by the shells and surround can range from 20° to 30°, depending on the application. A smaller angle facilitates manufacturing, while a larger angle increases the cost. In a special case, when the spherical angle is 180°, the shells become flat, and the sound produced is a plane wave. This is still superior to existing plane waves. The present invention has multiple shell diaphragms, providing a rich frequency range. The non-magnetic alloy elastic wire or the sleeve can be made of austenitic stainless steel, copper alloy, nickel alloy, or titanium alloy. Wear-resistant and elastic chemical materials include carbon fiber, thermoplastic polyurethane, polyimide, and engineering plastics. Ceramic sleeves also have a low friction coefficient.

[0006] The beneficial effects of the present invention are that there are multiple diaphragms, multiple sound sources, different resonance frequencies of the diaphragms, and rich frequencies; the diaphragms are distributed on the spherical surface, realizing point sound generation, better three-dimensional effect, and realistic sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solution of the present invention, the technical solution is described below with reference to the accompanying drawings.

[0008] Figure 1 It is a cross-sectional view of an embodiment of the present invention.

[0009] Figure 2 It is a cross-sectional view of another embodiment of the present invention.

[0010] Figure 3 yes Figure 1 A three-dimensional diagram of the shell and ring arrangement.

[0011] In the figure, 1. permanent magnet; 2. magnetic conductor; 3. magnetic core; 4. voice coil; 5. folding ring; 6. centering support; 7. bracket; 8. circular non-magnetic rigid surface; 9. elastic wire; 10. sub-shell; 11. sleeve; 12. sub-bracket; 13. circular folding ring. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings and examples.

[0013] Figure 1 It is an embodiment of the present invention, comprising a permanent magnet 1, a magnetizer 2, a magnetic core 3, a voice coil 4, a folding ring 5, a centering support 6, and a bracket 7. The permanent magnet 1, the magnetizer 2, and the magnetic core 3 are placed horizontally to form a closed magnetic field loop with a central vertical cross-section in the shape of a "mountain". The voice coil 4 is inserted into the magnetic field. A circular centering support 6 is connected to the edge position above the voice coil 4. The other end of the centering support 6 is connected to the bracket 7. At the edge position above the voice coil, there is a circular non-magnetic rigid surface 8 facing inward and connected to the voice coil 4. They are connected as one, and above the circular non-magnetic rigid surface 8, a number of elastic wires 9 are evenly fixed upwards. One end of the elastic wire 9 is fixed on the circular non-magnetic rigid surface 8. Above the circular non-magnetic rigid surface 8, there is a circular shell with an opening at the bottom. The material constituting the circular shell is a diaphragm material. The circular shell is divided into a number of polygonal sub-shells 10. The edges of the sub-shells 10 are cut with the same narrow edges on all sides, so that there are gaps between the sub-shells 10. The adjacent sub-shells 10 are connected horizontally with folding rings 5. The other end of the elastic wire 9 passes through the transverse restraint device and is fixed to the center of the surface of the sub-shell 10. In this way, when the voice coil 4 vibrates, the elastic wire 9 pulls the sub-shell to vibrate. The transverse restraint device is a rigid sleeve 11, or a few sections of sleeves set only at the initial, end and bending positions. The sleeve 11 is fixed on the sub-bracket 12, and the sub-bracket 12 is fixed on the bracket 7. Figure 1 The vertical center is rotated 180 degrees to obtain the three-dimensional shape of the present invention. Figure 1 In the embodiment, the spherical angle of the circular shell composed of the split shell 10 and the folding ring 5 is about 300°. A larger angle will increase the difficulty in manufacturing. Figure 2 In the embodiment, the spherical angle of the circular shell composed of the split shell 10 and the folding ring 5 is about 90°, which is more difficult to manufacture than Figure 1 Although it is small, the waves it emits are also spherical waves. Figure 2 In the figure, the five elastic wires 9 on the left have a small bending degree and are not equipped with a transverse restraining device; as a demonstration, the elastic wire 9 on the far right is equipped with a transverse restraining device and a circular folded ring 13 used for the transverse restraining device. Figure 3 yes Figure 1 The three-dimensional view of the circular shell formed by the split shell 10 and the surround 5 shows the voice coil 4 at its minimum amplitude, with the shell contracted. The left image shows the voice coil 4 at its maximum amplitude, with the shell expanded. This contraction and expansion completes a cycle of vibration, transmitting a cycle of spherical sound waves. This makes it easy for the human ear to locate the sound source, creating a distinct three-dimensional effect.

[0014] The above description is only a preferred embodiment of the present invention, and the embodiment is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A loudspeaker with an elastic wire-driven spherical diaphragm, comprising a permanent magnet, a magnet conductor, a magnetic core, a voice coil, a diaphragm, a folded ring, a centering support, a bracket, leads, and a dust cover. When the permanent magnet, magnet conductor, and magnetic core are placed horizontally, a vertical cross-section at the center forms a "mountain"-shaped magnet. Rotating 180° about the vertical center of this cross-section forms a cylindrical magnetic field. The voice coil is inserted into the magnet. One end of the circular centering support is connected outwardly to the edge above the voice coil. The other end of the centering support is connected to the bracket. The loudspeaker is characterized by: At the upper edge of the voice coil, there is a circular non-magnetic rigid surface connected to the voice coil as a whole. On the circular non-magnetic rigid surface, one end of a plurality of elastic wires is evenly fixed upward. Above the circular non-magnetic rigid surface, there is a circular shell with an opening at the bottom. The material constituting the circular shell is a diaphragm material. The circular shell is divided into a plurality of polygonal shells. The edges of the shells are cut off with the same narrow edges around them, so that there are gaps between the shells. The adjacent shells are connected horizontally by the folding ring. The shells and The folding ring forms a new circular shell with an opening at the bottom; the other end of the elastic wire passes through the transverse restraint device and is fixed to the center of the surface of the sub-shell, the transverse restraint device is fixed on the sub-bracket, and the sub-bracket is fixed on the bracket; the transverse restraint device is a complete rigid sleeve, or several sections of sleeves are only set at the initial, end and bending positions, or a circular folding ring is only set at the initial, end and bending positions, the elastic wire is fixed at the center of the circular folding ring, and the edge of the circular folding ring is fixed on the sub-bracket.

2. The speaker with an elastic wire-driven spherical diaphragm according to claim 1, characterized in that: The area and specific gravity of the sub-shells are different at different positions; the spherical angle of the circular shell composed of the sub-shells and the folding ring ranges from 20° to 300°; the material of the elastic wire or the sleeve is a non-magnetic alloy material, or a wear-resistant and elastic chemical material.

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