Square loudspeaker with internal and external synchronous magnetic circuits

Abstract

The utility model discloses a square loudspeaker with internal and external synchronous magnetic circuits, and belongs to the technical field of loudspeakers. A square loudspeaker with internal and external synchronous magnetic circuits comprises a diaphragm and a shell, a gasket is arranged at the bottom of the shell and connected with the shell through a clamping groove, a voice coil is arranged at the bottom of the diaphragm and connected with the diaphragm in an attached mode, a lower magnetic circuit is arranged above the gasket, and a middle magnetic circuit is arranged above the lower magnetic circuit. In order to solve the problem that a voice coil vibrates up and down at one end of a magnet under the action of a magnetic field, so that the voice coil easily exceeds a magnetic gap when vibrating upwards, and nonlinear distortion of a loudspeaker is caused, magnetic lines generated by internal and external magnets of an upper magnetic circuit are magnetically conductive through a middle magnet, and magnetic lines generated by internal and external magnets of a lower magnetic circuit are magnetically conductive through the middle magnet; the magnetic field intensity of the medium magnet is doubled, the sensitivity of the loudspeaker is doubled, the magnetism of the medium magnet is in the horizontal direction, and the voice coil is doubled under the action of the magnetic field of the medium magnet.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a square loudspeaker with internal and external synchronous magnetic circuits. Background Art

[0002] For speakers, the height of the magnet has a direct impact on the sensitivity of the speaker. However, in the traditional speaker magnetic circuit structure, the voice coil is placed at one end of the magnet and is affected by the magnetic field at one end of the magnet. As the height of the magnet increases to a certain extent, the magnetic field on one side will tend to saturate. Therefore, for conventional magnetic circuit structures, the voice coil has low efficiency in the magnetic field.

[0003] On the other hand, the voice coil vibrates up and down due to the magnetic field at one end of the magnet, so when the voice coil vibrates upward, it is easy to exceed the magnetic gap, causing nonlinear distortion of the speaker. Utility Model Content

[0004] The purpose of the utility model is to provide a square speaker with internal and external synchronous magnetic circuits. The magnetic lines of force generated by the internal and external magnets of the upper magnetic circuit pass through the middle magnetic conductor, and the magnetic lines of force generated by the internal and external magnets of the lower magnetic circuit also pass through the middle magnetic conductor. The magnetic field strength of the middle magnetic conductor is doubled, and the sensitivity of the speaker is also doubled. In addition, the magnetism of the middle magnet is horizontal, and the magnetic field effect of the voice coil in the middle magnet is also doubled, which can solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a square speaker with internal and external synchronous magnetic circuits, comprising a diaphragm and a shell, a gasket is arranged at the bottom of the shell, the gasket is connected to the shell through a slot, a voice coil is arranged at the bottom of the diaphragm, the voice coil is fitted and connected to the diaphragm, a lower magnetic circuit is arranged above the gasket, a middle magnetic circuit is arranged above the lower magnetic circuit, an upper magnetic circuit is arranged above the middle magnetic circuit, and the upper magnetic circuit, the middle magnetic circuit and the lower magnetic circuit all adopt a bar magnet structure.

[0006] Preferably, a bracket is provided at the bottom of the outer side of the diaphragm, and the diaphragm is connected to the housing via the bracket.

[0007] Preferably, the upper magnetic circuit includes an upper outer magnet and an upper inner magnet, the upper inner magnet is located inside the upper outer magnet, and the upper outer magnet and the upper inner magnet are both composed of four bar magnets.

[0008] Preferably, the central magnetic circuit includes a central outer magnet and a central inner magnet, the central inner magnet is located inside the central outer magnet, and the central outer magnet and the central inner magnet are both composed of four bar magnets.

[0009] Preferably, the lower magnetic circuit includes a lower outer magnet and a lower inner magnet, the lower inner magnet is located inside the lower outer magnet, and the lower outer magnet and the lower inner magnet are both composed of four bar magnets.

[0010] Preferably, the voice coil extends between the lower external magnet and the lower internal magnet.

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

[0012] 1. The utility model divides a magnet of the same height into two thin sheets. The magnetic field directions of the two magnets are in the up-down direction. Another magnet is placed between the two magnets. The magnetic field direction is in the horizontal direction. The magnetic circuit adopts an inner and outer magnetic circuit structure. The outer magnetic circuit is composed of three magnets, upper, middle and lower. The inner magnetic circuit is also composed of three magnets, upper, middle and lower. The voice coil is wound on the skeleton and penetrates into the position of the middle magnet, so that the magnetic lines of force of the upper and lower magnets can be concentrated on the middle magnet. The voice coil is placed at the position of the middle magnet and is subjected to a stronger magnetic field. The BL value of the speaker of this magnetic circuit is higher than that of the conventional magnetic circuit speaker. The speaker volume is increased. The voice coil is subjected to the magnetic field of the upper and lower magnets, so that the upper and lower vibrations of the voice coil are more balanced under high power conditions. The speaker power is increased, the voice coil is subjected to a more balanced magnetic field effect, and the distortion is lower.

[0013] 2. In the utility model, the magnetism of the upper outer magnet and the upper inner magnet, as well as the magnetic direction of the lower outer magnet and the lower inner magnet are upper and lower magnetism, the upper one is N (S), the lower one is S (N), the magnetism of the inner and outer magnets are opposite, the magnetism of the upper and lower magnets are opposite, and the magnetism of the middle outer magnet and the middle inner magnet is in a horizontal direction, with opposite magnetism. The magnetic lines of force generated by the inner and outer magnets of the upper magnetic circuit pass through the middle magnetic permeability, and the magnetic lines of force generated by the inner and outer magnets of the lower magnetic circuit also pass through the middle magnetic permeability. The magnetic field strength of the middle magnetic permeability is doubled, and the sensitivity of the speaker is also doubled. In addition, the magnetism of the middle magnet is in a horizontal direction, and the magnetic field effect of the voice coil in the middle magnet is also doubled. 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 expanded 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 line structure of the utility model.

[0018] In the figure: 1, diaphragm; 2, housing; 3, voice coil; 4, upper magnetic circuit; 5, middle magnetic circuit; 6, lower magnetic circuit; 7, gasket; 101, bracket; 401, upper outer magnet; 402, upper inner magnet; 501, middle outer magnet; 502, middle inner magnet; 601, lower outer magnet; 602, lower inner 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 voice coil vibrates up and down due to the magnetic field at one end of the magnet, it is easy for the voice coil to exceed the magnetic gap when vibrating upward, thus causing nonlinear distortion of the speaker; please refer to Figure 1-4 , the utility model provides the following solutions:

[0021] A square speaker with internal and external synchronous magnetic circuits comprises a diaphragm 1 and a shell 2. A gasket 7 is arranged at the bottom of the shell 2, and the gasket 7 is connected to the shell 2 through a slot. A voice coil 3 is arranged at the bottom of the diaphragm 1, and the voice coil 3 is connected to the diaphragm 1 in a close fit. A lower magnetic circuit 6 is arranged above the gasket 7, a middle magnetic circuit 5 is arranged above the lower magnetic circuit 6, and an upper magnetic circuit 4 is arranged above the middle magnetic circuit 5. The upper magnetic circuit 4, the middle magnetic circuit 5 and the lower magnetic circuit 6 all adopt a bar magnet structure. A bracket 101 is arranged at the bottom of the outer side of the diaphragm 1, and the diaphragm 1 is connected to the shell 2 through the bracket 101.

[0022] In this embodiment, the magnetic circuit system is composed of three groups of magnetic circuits, namely, upper outer magnet 401 and upper inner magnet 402, middle outer magnet 501 and middle inner magnet 502, lower outer magnet 601 and lower inner magnet 602, and each group of magnetic structures is composed of four bar magnets.

[0023] Among them, the magnetism of the upper outer magnet 401 and the upper inner magnet 402 and the magnetic direction of the lower outer magnet 601 and the lower inner magnet 602 are up and down magnetism, the upper side is N (S), the lower side is S (N), the magnetism of the inner and outer magnets is opposite, the magnetism of the upper and lower magnets is opposite, and the magnetism of the middle outer magnet 501 and the middle inner magnet 502 is in the horizontal direction, and the magnetism is opposite;

[0024] The magnetic lines of force generated by the inner and outer magnets of the upper magnetic circuit pass through the middle magnetic conductor, and the magnetic lines of force generated by the inner and outer magnets of the lower magnetic circuit also pass through the middle magnetic conductor, so the magnetic field strength of the middle magnetic conductor is doubled, and the sensitivity of the speaker is also doubled. In addition, the magnetism of the middle magnet is horizontal, so the magnetic field effect of the voice coil in the middle magnet is also doubled. The voice coil adopts a bracket structure, which is convenient for placement in the middle of the middle magnet;

[0025] The upper magnetic circuit 4 includes an upper outer magnet 401 and an upper inner magnet 402, the upper inner magnet 402 is located inside the upper outer magnet 401, and the upper outer magnet 401 and the upper inner magnet 402 are both composed of four bar magnets. The middle magnetic circuit 5 includes a middle outer magnet 501 and a middle inner magnet 502, the middle inner magnet 502 is located inside the middle outer magnet 501, and the middle outer magnet 501 and the middle inner magnet 502 are both composed of four bar magnets. The lower magnetic circuit 6 includes a lower outer magnet 601 and a lower inner magnet 602, the lower inner magnet 602 is located inside the lower outer magnet 601, and the lower outer magnet 601 and the lower inner magnet 602 are both composed of four bar magnets. The voice coil 3 extends between the lower outer magnet 601 and the lower inner magnet 602.

[0026] The direction of the magnetic field in the middle magnetic circuit is N (S) on the right side of the magnet and S (N) on the left side. The magnetic lines of force go from N on the left side of the outer magnet to S on the left side of the inner magnet.

[0027] The magnetic field direction of the upper and lower magnetic circuits is N (S) above the magnet and S (N) below. The magnetic lines of force run from N above the outer magnet to S above the inner magnet.

[0028] Working principle: The magnetic circuit system is composed of three groups of magnetic circuits: upper outer magnet 401 and upper inner magnet 402, middle outer magnet 501 and middle inner magnet 502, lower outer magnet 601 and lower inner magnet 602. Each group of magnet structures is composed of four bar magnets. The magnetic directions of the upper outer magnet 401 and the upper inner magnet 402 and the lower outer magnet 601 and the lower inner magnet 602 are upper and lower magnetism, the upper side is N (S), the lower side is S (N), the magnetic directions of the inner and outer magnets are opposite, and the magnetic directions of the upper and lower magnets are opposite. The magnetism of the middle outer magnet 501 and the middle inner magnet 502 is horizontal, and the magnetism is opposite. The magnetic lines of force generated by the inner and outer magnets of the upper magnetic circuit pass through the middle magnetic conductor, and the magnetic lines of force generated by the inner and outer magnets of the lower magnetic circuit also pass through the middle magnetic conductor. Therefore, the magnetic field strength of the middle magnetic conductor is doubled, and the sensitivity of the speaker is also doubled. In addition, the magnetism of the middle magnet is horizontal, so the magnetic field effect of the voice coil in the middle magnet will also be doubled. The voice coil adopts a bracket structure, which is convenient for placement in the middle of the middle magnet.

[0029] 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.

[0030] 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 square speaker with internal and external synchronous magnetic circuits, comprising a diaphragm (1) and a housing (2), characterized in that: A gasket (7) is arranged at the bottom of the shell (2), and the gasket (7) is connected to the shell (2) via a slot; a voice coil (3) is arranged at the bottom of the diaphragm (1), and the voice coil (3) is connected to the diaphragm (1) in a close fit; a lower magnetic circuit (6) is arranged above the gasket (7), a middle magnetic circuit (5) is arranged above the lower magnetic circuit (6), and an upper magnetic circuit (4) is arranged above the middle magnetic circuit (5); the upper magnetic circuit (4), the middle magnetic circuit (5) and the lower magnetic circuit (6) all adopt a bar magnet structure.

2. The square speaker with internal and external synchronous magnetic circuit according to claim 1, characterized in that: A bracket (101) is provided at the bottom of the outer side of the diaphragm (1), and the diaphragm (1) is connected to the housing (2) via the bracket (101).

3. The square speaker with internal and external synchronous magnetic circuit according to claim 1, characterized in that: The upper magnetic circuit (4) comprises an upper outer magnet (401) and an upper inner magnet (402), wherein the upper inner magnet (402) is located inside the upper outer magnet (401), and the upper outer magnet (401) and the upper inner magnet (402) are both composed of four bar magnets.

4. The square speaker with internal and external synchronous magnetic circuit according to claim 1, characterized in that: The middle magnetic circuit (5) comprises a middle outer magnet (501) and a middle inner magnet (502), wherein the middle inner magnet (502) is located inside the middle outer magnet (501), and the middle outer magnet (501) and the middle inner magnet (502) are both composed of four bar magnets.

5. The square speaker with internal and external synchronous magnetic circuit according to claim 1, characterized in that: The lower magnetic circuit (6) comprises a lower external magnet (601) and a lower internal magnet (602), wherein the lower internal magnet (602) is located inside the lower external magnet (601), and both the lower external magnet (601) and the lower internal magnet (602) are composed of four bar magnets.

6. The square speaker with internal and external synchronous magnetic circuit according to claim 5, characterized in that: The voice coil (3) extends between the lower external magnet (601) and the lower internal magnet (602).

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