A multi-magnetic circuit loudspeaker

Abstract

This utility model discloses a multi-magnetic circuit loudspeaker, including a support, a magnetic circuit assembly, and a vibration assembly. The support is a hollow cavity, and an annular washer is integrally injection molded on the upper part of the inner wall of the hollow cavity. The magnetic circuit assembly includes an annular assembly and a central assembly, with a magnetic circuit gap between the annular assembly and the central assembly. The annular assembly includes an annular magnet disposed on the lower wall of the annular washer and a bottom washer disposed on the lower wall of the annular magnet and sealing the bottom of the hollow cavity. The central assembly includes a central lower magnet disposed on the upper wall of the middle part of the bottom washer, a central middle magnet disposed on the upper wall of the central lower magnet, and a central upper magnet disposed on the upper wall of the central middle magnet. The vibration assembly includes a diaphragm disposed on the upper part of the hollow cavity and a voice coil extending from the diaphragm toward the magnetic circuit gap. The diaphragm is disposed between the central middle magnet and the central upper magnet, and the thickness of the central upper magnet is adapted to the vibration amplitude of the diaphragm.

Description

Technical Field

[0001] This utility model relates to the field of loudspeakers, and in particular to a multi-magnetic-circuit loudspeaker. Background Technology

[0002] A coaxial speaker is a high-frequency and low-frequency audio signal device. This device essentially has two speakers, one for high frequencies and one for low frequencies. That is, two loudspeakers are mounted on the same axis, one responsible for reproducing high frequencies and the other for mid-low frequencies. Furthermore, the diaphragms of these two loudspeakers overlap, and because their physical positioning is close to a point source, the sound field localization of the reproduced music is ideal.

[0003] However, in the existing speaker design of wireless headphones, the coaxial speaker is small in size due to the influence of the headphone shell, which in turn affects the size of the coaxial speaker and thus reduces its sound quality. Therefore, the key to the design is how to ensure the sound quality of the headphones without increasing the size.

[0004] For example, Chinese Patent 202110878961.2 achieves the independence of the first speaker unit and the second speaker unit through the base body, thereby improving the sound quality of the speaker. However, in actual production, the production cost of this irregular structure is high, which affects the production of the speaker. At the same time, this structure also has limitations in terms of small volume. Utility Model Content

[0005] The main purpose of this invention is to propose a multi-magnetic circuit loudspeaker that aims to improve high-frequency sound quality without increasing the overall height of the loudspeaker.

[0006] To achieve the above objectives, this utility model proposes a multi-magnetic circuit loudspeaker, comprising:

[0007] The support is a hollow cavity, and an annular washer is integrally injection molded on the upper part of the inner wall of the hollow cavity.

[0008] A magnetic circuit assembly, comprising an annular assembly and a central assembly, with a magnetic circuit gap between the annular assembly and the central assembly, wherein the annular assembly comprises an annular magnet disposed on the lower wall of the annular washer and a bottom washer disposed on the lower wall of the annular magnet and sealing the bottom of the hollow cavity.

[0009] The central assembly includes a lower central magnet located on the upper wall of the middle part of the bottom washer, a middle central magnet located on the upper wall of the lower central magnet, and an upper central magnet located on the upper wall of the middle central magnet.

[0010] The vibration assembly includes a diaphragm disposed in the upper part of the hollow cavity and a voice coil extending from the diaphragm toward the magnetic circuit gap.

[0011] A central washer is provided between the lower central magnet and the middle central magnet.

[0012] The diaphragm is positioned between the central magnet and the upper central magnet.

[0013] The thickness of the magnet at the center is adapted to the vibration amplitude of the diaphragm.

[0014] In practical design, the traditional magnetic circuit component structure is changed by adding a central magnet on the upper wall of the diaphragm, increasing the magnetic volume and thus increasing the BL. A high BL value means that high-performance permanent magnet materials and appropriate coil lengths are used in the magnetic circuit design, which can more effectively convert electrical energy into sound energy, thereby improving the speaker's sensitivity and power handling capability.

[0015] At the same time, by setting the thickness of the central magnet reasonably, the high-frequency sound quality of the speaker is improved without increasing the overall thickness. At the same time, the structure is relatively simple, making it a good reference model for speaker design. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention;

[0017] Figure 2 For the purpose of this utility model explosion Figure 1 ;

[0018] Figure 3 For the purpose of this utility model explosion Figure 2 ;

[0019] Figure 4 This is a three-dimensional schematic diagram of the present invention.

[0020] In the picture,

[0021] 1 is the support frame, 10 is the bottom washer.

[0022] 2 is a ring-shaped component, 21 is a ring-shaped magnet, and 22 is a ring-shaped washer.

[0023] 3 is the central component, 31 is the lower central magnet, 32 is the middle central magnet, and 33 is the upper central magnet.

[0024] 41 is the diaphragm, 42 is the voice coil.

[0025] 411 is the first arc-shaped part, and 412 is the second arc-shaped part.

[0026] 5 represents the membrane aperture, and 50 represents the solder pad.

[0027] 61 is the low-frequency gap, and 62 is the high-frequency gap. Detailed Implementation

[0028] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0029] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] like Figures 1 to 4 As shown, a multi-magnetic circuit loudspeaker includes:

[0032] Support 1, the support 1 is a hollow cavity, and the upper part of the inner wall of the hollow cavity is integrally injection molded with an annular washer 22;

[0033] A magnetic circuit assembly, comprising an annular assembly 2 and a central assembly 3, with a magnetic circuit gap between the annular assembly 2 and the central assembly 3, the annular assembly 2 comprising an annular magnet 21 disposed on the lower wall of the annular washer 22 and a bottom washer 10 disposed on the lower wall of the annular magnet 21 and sealing the bottom of the hollow cavity.

[0034] The central component 3 includes a lower central magnet 31 located on the upper wall of the middle part of the bottom washer 10, a middle central magnet 32 ​​located on the upper wall of the lower central magnet 31, and an upper central magnet 33 located on the upper wall of the middle central magnet 32.

[0035] A central washer 30 is provided between the lower central magnet and the middle central magnet.

[0036] The vibration assembly includes a diaphragm 41 disposed in the upper part of the hollow cavity and a voice coil 42 extending from the diaphragm 41 toward the magnetic circuit gap.

[0037] The diaphragm 41 is disposed between the central magnet and the upper magnet.

[0038] The thickness of the central magnet 33 is adapted to the vibration amplitude of the diaphragm 41.

[0039] In the actual design, the traditional magnetic circuit component structure is changed, and a central magnet 33 is added to the upper wall of the diaphragm 41 to increase the magnetic volume and thus increase BL. A high BL value means that high-performance permanent magnet materials and appropriate coil length are used in the magnetic circuit design, which can more effectively convert electrical energy into sound energy, thereby improving the sensitivity and power handling capability of the loudspeaker.

[0040] At the same time, by setting the thickness of the central magnet 33 reasonably, the high-frequency sound quality of the speaker is improved without increasing the overall thickness. At the same time, the structure is relatively simple, making it a good reference model for speaker design.

[0041] Specifically, the central magnet 33 is a solid or hollow cylinder, which can be designed according to actual needs.

[0042] In this embodiment of the invention, the diaphragm 41 includes a first arc-shaped portion 411 and a second arc-shaped portion 412. The voice coil 42 is disposed at the junction of the first arc-shaped portion 411 and the second arc-shaped portion 412. The central magnet 33 increases the magnetic flux in the middle, thereby increasing the bandwidth of the high-frequency part. This means that the higher the magnetic flux, the higher the stability between the magnetic shear force generated by the voice coil 42 after energization and the central magnetic circuit assembly, resulting in lower losses in the driving component and higher sound quality reproduction.

[0043] Specifically, the diaphragm 41 is provided with a positioning groove in the middle, the bottom wall of the positioning groove is attached to the upper wall of the central magnet 32, and the top wall of the positioning groove is attached to the lower wall of the central magnet 33, which facilitates installation.

[0044] In this embodiment of the invention, the bonding structure is adhesive bonding.

[0045] Specifically, the welding foot and the annular washer 22 are integrally injection molded from two pieces of material that are staggered and stacked together. The welding foot is staggered in the height direction and the radial direction. Finally, the mating or connecting positions are cut.

[0046] In this embodiment of the utility model, the bottom washer 10 is provided with a through-hole diaphragm 5, thereby avoiding negative pressure and improving the amplitude and bandwidth of the diaphragm 41.

[0047] Specifically, the annular component 2 and the central component 3 are circular or elliptical in shape.

[0048] In this embodiment of the invention, the outer diameter of the lower central magnet 31 is greater than the outer diameter of the middle central magnet 32 ​​and the outer diameter of the upper central magnet 33.

[0049] That is, increase the height of the high-frequency magnetic field and reduce the width; the widths of the central magnet 32 ​​and the central upper magnet 33 can be the same or different.

[0050] Specifically, the magnetic circuit gap includes a low-frequency gap 61 and a high-frequency magnetic circuit gap 62. Changing the width of the magnetic circuit gap improves the mutual influence between low frequency and high frequency, respectively.

[0051] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A multi-magnetic circuit loudspeaker, characterized by, include: The support is a hollow cavity, and an annular washer is integrally injection molded on the upper part of the inner wall of the hollow cavity. A magnetic circuit assembly, comprising an annular assembly and a central assembly, with a magnetic circuit gap between the annular assembly and the central assembly, wherein the annular assembly comprises an annular magnet disposed on the lower wall of the annular washer and a bottom washer disposed on the lower wall of the annular magnet and sealing the bottom of the hollow cavity. The central assembly includes a lower central magnet located on the upper wall of the middle part of the bottom washer, a middle central magnet located on the upper wall of the lower central magnet, and an upper central magnet located on the upper wall of the middle central magnet. The vibration assembly includes a diaphragm disposed in the upper part of the hollow cavity and a voice coil extending from the diaphragm toward the magnetic circuit gap. A central washer is disposed between the central lower magnet and the central middle magnet. The diaphragm is positioned between the central magnet and the upper central magnet. The thickness of the magnet at the center is adapted to the vibration amplitude of the diaphragm.

2. The multi-magnetic circuit loudspeaker of claim 1, wherein: The central magnet is a solid or hollow cylinder.

3. The multi-magnetic circuit loudspeaker of claim 1, wherein: The diaphragm includes a first arc-shaped portion and a second arc-shaped portion, and the voice coil is located at the junction of the first arc-shaped portion and the second arc-shaped portion.

4. The multi-magnetic circuit loudspeaker of claim 1, wherein: The diaphragm has a positioning groove in the middle, the bottom wall of the positioning groove is attached to the upper wall of the central magnet, and the top wall of the positioning groove is attached to the lower wall of the central magnet.

5. The multi-magnetic circuit loudspeaker as described in claim 4, characterized in that: The bonding structure is achieved by adhesive bonding.

6. The multi-magnetic circuit loudspeaker as described in claim 1, characterized in that: It also includes welding feet, which are integrally injection molded from two pieces of material that are staggered and stacked together. The welding feet are staggered in the height direction and the radial direction.

7. The multi-magnetic circuit loudspeaker as described in claim 1, characterized in that: The bottom washer has a through-hole.

8. The multi-magnetic circuit loudspeaker as described in claim 1, characterized in that: The annular component and the central component are circular or elliptical in shape.

9. The multi-magnetic circuit loudspeaker as described in claim 1, characterized in that: The outer diameter of the lower central magnet is greater than the outer diameter of the middle central magnet and the outer diameter of the upper central magnet.

10. The multi-magnetic circuit loudspeaker as described in claim 9, characterized in that: The magnetic circuit gap includes a low-frequency gap and a high-frequency magnetic circuit gap.

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