Loudspeaker with double voice coils

Abstract

The utility model discloses a double-voice-coil loudspeaker, and belongs to the technical field of loudspeakers. A double-voice-coil loudspeaker comprises a front cover and a shell, a diaphragm is arranged in the shell, an upper magnetic circuit is arranged above the diaphragm and comprises an upper inner magnet, an upper middle magnet and an upper outer magnet, and a lower magnetic circuit is arranged below the diaphragm and comprises a lower inner magnet, a lower middle magnet and a lower outer magnet. In order to solve the problems that the larger the area of a diaphragm is, the poorer the rigidity is, segmentation vibration is easily generated when the diaphragm vibrates, more curve peaks and valleys are caused, and the tone quality of a loudspeaker is poor, a ring is divided into an inner voice coil and an outer voice coil which are bonded on the diaphragm and are respectively placed above a gap between a lower middle magnet and a lower outer magnet and above a gap between a lower inner magnet and the lower middle magnet; because the directions of magnetic fields borne by the outer voice coil and the inner voice coil are opposite, the two voice coils need to be reversely connected during wiring, namely the positive pole of the outer voice coil needs to be connected with the negative pole of the inner voice coil, so that the vibration directions of the two voice coils are consistent.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a double voice coil loudspeaker. Background Art

[0002] As market demands continue to change, speakers are increasingly used as sound-generating devices. A speaker, also known as a loudspeaker, is an electroacoustic transducer that can convert electrical signals into sound signals and radiate them into the air. As people's appreciation of music continues to improve, the sound effects of existing speakers with a single magnetic circuit and a single voice coil can no longer meet people's needs;

[0003] The speaker makes sound by driving the diaphragm to vibrate with the voice coil. The size and area of ​​the diaphragm directly affect the sound quality. The larger the diaphragm area, the greater the sound pressure radiated. The larger the diaphragm area, the greater the amplitude and the better the low-frequency effect of the speaker. Especially for headphones, the speaker size is more than 40mm, and the diaphragm area is more than 3 times larger than that of small headphones. However, the larger the diaphragm area, the worse the rigidity. When the diaphragm vibrates, it is easy to produce split vibration, resulting in more peaks and valleys in the curve and poor speaker sound quality. Utility Model Content

[0004] The utility model aims to provide a dual voice coil speaker, wherein the coils are divided into an inner voice coil and an outer voice coil, both of which are bonded to a diaphragm and are respectively placed above a gap between a lower middle magnet and a lower outer magnet and above a gap between a lower inner magnet and a lower middle magnet. Since the directions of the magnetic fields to which the outer voice coil and the inner voice coil are subjected are opposite, the two voice coils need to be reversely connected when wiring, that is, the positive pole of the outer voice coil needs to be connected to the negative pole of the inner voice coil, so as to ensure that the vibration directions of the two voice coils are consistent, thereby solving the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dual voice coil speaker, comprising a front cover and an outer shell, a diaphragm is arranged inside the outer shell, an upper magnetic circuit is arranged above the diaphragm, the upper magnetic circuit includes an upper inner magnet, an upper middle magnet and an upper outer magnet, a lower magnetic circuit is arranged below the diaphragm, the lower magnetic circuit includes a lower inner magnet, a lower middle magnet and a lower outer magnet, the upper magnetic circuit is fitted with the front cover, and the lower magnetic circuit is fitted with the outer shell.

[0006] Preferably, a PCB element is arranged on the outer side of the bottom of the shell, and the PCB element is connected to the shell via a slot.

[0007] Preferably, a gasket support ring is provided on the outer side of the bottom of the diaphragm, and the diaphragm is connected to the housing via the gasket support ring.

[0008] Preferably, a voice coil assembly is provided at the bottom of the diaphragm, and the voice coil assembly comprises an inner voice coil and an outer voice coil.

[0009] Preferably, the inner voice coil and the outer voice coil are in contact with the diaphragm.

[0010] Preferably, the outer voice coil is located above the gap between the lower middle magnet and the lower outer magnet, and the inner voice coil is located above the gap between the lower inner magnet and the lower middle magnet.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model, a dual voice coil speaker, is a speaker that has two voice coils bonded to the dome of the diaphragm, which is equivalent to dividing the dome of the diaphragm into two parts. Each voice coil is responsible for the vibration of a part of the dome of the diaphragm. This, on the one hand, enhances the supporting force of the dome of the diaphragm. On the other hand, the two voice coils drive the diaphragm to vibrate, and the vibration strength is doubled, and the sensitivity of the speaker is increased by more than 3dB.

[0013] 2. In the utility model, the coils are divided into an inner voice coil and an outer voice coil, both of which are bonded to the diaphragm and are placed above the gap between the lower middle magnet and the lower outer magnet and above the gap between the lower inner magnet and the lower middle magnet, so as to facilitate the up and down vibration of the voice coil. The outer voice coil is driven by the magnetic field of the outer magnet and the middle magnet to drive the diaphragm to vibrate up and down, and the inner voice coil is driven by the magnetic field of the inner magnet and the middle magnet to drive the diaphragm to vibrate up and down. Since the magnetic fields of the outer voice coil and the inner voice coil are in opposite directions, the two voice coils need to be reversed when wiring, that is, the positive pole of the outer voice coil should be connected to the negative pole of the inner voice coil, so as to ensure that the vibration directions of the two voice coils are consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall front view of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall exploded structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the magnetic circuit structure of the utility model.

[0018] In the figure: 1, front cover; 2, outer shell; 3, upper magnetic circuit; 4, diaphragm; 5, voice coil assembly; 6, lower magnetic circuit; 7, PCB component; 301, upper inner magnet; 302, upper middle magnet; 303, upper outer magnet; 401, gasket support ring; 501, inner voice coil; 502, outer voice coil; 601, lower inner magnet; 602, lower middle magnet; 603, lower outer magnet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In order to solve the problem that the larger the diaphragm area, the worse the rigidity, and the diaphragm is prone to split vibration when vibrating, resulting in more peaks and valleys in the curve and poor speaker sound quality; please refer to Figure 1-4 , the utility model provides the following solutions:

[0021] A dual voice coil speaker comprises a front cover 1 and a shell 2, wherein a diaphragm 4 is arranged inside the shell 2, an upper magnetic circuit 3 is arranged above the diaphragm 4, the upper magnetic circuit 3 comprises an upper inner magnet 301, an upper middle magnet 302 and an upper outer magnet 303, a lower magnetic circuit 6 is arranged below the diaphragm 4, the lower magnetic circuit 6 comprises a lower inner magnet 601, a lower middle magnet 602 and a lower outer magnet 603, the upper magnetic circuit 3 is fitted with the front cover 1, the lower magnetic circuit 6 is fitted with the shell 2, and the upper cover 1 is provided with a sound outlet hole, which can be placed in the middle or on the side;

[0022] In this embodiment, the magnetic circuit system is composed of upper and lower double-sided magnetic circuits, and the magnetic circuit on each side is composed of inner magnetism, middle magnetism and outer magnetism. In addition, the magnetic circuit system can also be assembled by only single-sided magnetic circuits. The advantages of single-sided magnetic circuits are that the number of magnets is small, the assembly process is simple, and the cost is low, but the performance is 50% less than that of double-sided magnetic circuits. The magnetism of the outer magnet and the inner magnet is in the Y-axis direction, and the inner and outer magnetism are opposite. The magnetism of the middle magnet is in the X-axis direction, and the magnetism of the upper and lower magnetic circuits is opposite.

[0023] In this embodiment, a PCB component 7 is provided on the outer side of the bottom of the housing 2, and the PCB component 7 is connected to the housing 2 through a card slot. A gasket support ring 401 is provided on the outer side of the bottom of the diaphragm 4, and the diaphragm 4 is connected to the housing 2 through the gasket support ring 401. A voice coil assembly 5 is provided at the bottom of the diaphragm 4, and the voice coil assembly 5 includes an inner voice coil 501 and an outer voice coil 502. The inner voice coil 501 and the outer voice coil 502 are attached to the diaphragm 4, and the outer voice coil 502 is located above the gap between the lower middle magnet 602 and the lower outer magnet 603, and the inner voice coil 501 is located above the gap between the lower inner magnet 601 and the lower middle magnet 602.

[0024] In this embodiment, the voice coil is divided into an inner voice coil 501 and an outer voice coil 502, both of which are bonded to the diaphragm and placed above the gap between the lower middle magnet 602 and the lower outer magnet 603 and above the gap between the lower inner magnet 601 and the lower middle magnet 602, respectively, to facilitate the up and down vibration of the voice coil. The outer voice coil 502 is driven by the magnetic field of the external magnet and the middle magnet to drive the diaphragm to vibrate up and down, and the inner voice coil 501 is driven by the magnetic field of the inner magnet and the middle magnet to drive the diaphragm to vibrate up and down. Since the magnetic fields to which the outer voice coil 502 and the inner voice coil 501 are subjected are in opposite directions, the two voice coils need to be reversed when wiring, that is, the positive pole of the outer voice coil 502 should be connected to the negative pole of the inner voice coil 501, so as to ensure that the vibration directions of the two voice coils are consistent.

[0025] Working principle: the magnetic circuit system is composed of upper and lower double-sided magnetic circuits, and the magnetic circuit on each side is composed of inner magnet, middle magnet and outer magnet. The voice coil is divided into inner voice coil 501 and outer voice coil 502, both of which are bonded to the diaphragm and placed above the gap between the lower middle magnet 602 and the lower outer magnet 603 and the gap between the lower inner magnet 601 and the lower middle magnet 602, respectively, to facilitate the up and down vibration of the voice coil. The outer voice coil 502 is driven by the magnetic field of the external magnet and the middle magnet to drive the diaphragm to vibrate up and down, and the inner voice coil 501 is driven by the magnetic field of the inner magnet and the middle magnet to drive the diaphragm to vibrate up and down. Since the magnetic fields of the outer voice coil 502 and the inner voice coil 501 are in opposite directions, the two voice coils need to be reversed when wiring, that is, the positive pole of the outer voice coil 502 should be connected to the negative pole of the inner voice coil 501, so as to ensure that the vibration directions of the two voice coils are consistent.

[0026] 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.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual voice coil speaker, comprising a front cover (1) and a housing (2), characterized in that: A diaphragm (4) is arranged inside the shell (2), an upper magnetic circuit (3) is arranged above the diaphragm (4), the upper magnetic circuit (3) includes an upper inner magnet (301), an upper middle magnet (302) and an upper outer magnet (303), a lower magnetic circuit (6) is arranged below the diaphragm (4), the lower magnetic circuit (6) includes a lower inner magnet (601), a lower middle magnet (602) and a lower outer magnet (603), the upper magnetic circuit (3) is in contact with the front cover (1), and the lower magnetic circuit (6) is in contact with the shell (2).

2. A dual voice coil speaker according to claim 1, characterized in that: A PCB element (7) is arranged on the outer side of the bottom of the housing (2), and the PCB element (7) is connected to the housing (2) via a card slot.

3. The dual voice coil speaker according to claim 1, characterized in that: A gasket support ring (401) is provided on the outer side of the bottom of the diaphragm (4), and the diaphragm (4) is connected to the housing (2) via the gasket support ring (401).

4. The dual voice coil speaker according to claim 1, characterized in that: A voice coil assembly (5) is arranged at the bottom of the diaphragm (4), and the voice coil assembly (5) comprises an inner voice coil (501) and an outer voice coil (502).

5. A dual voice coil speaker according to claim 4, characterized in that: The inner voice coil (501) and the outer voice coil (502) are bonded to the diaphragm (4).

6. A dual voice coil speaker according to claim 5, characterized in that: The outer voice coil (502) is located above the gap between the lower middle magnet (602) and the lower outer magnet (603), and the inner voice coil (501) is located above the gap between the lower inner magnet (601) and the lower middle magnet (602).

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