A loudspeaker with double vibration and double magnetic circuit structure

Abstract

The utility model discloses a kind of loudspeaker of double vibration and double magnetic circuit structure, including shell and two magnetic conduction components, the shell is equipped with baffle, the baffle separates the inside of shell into first acoustic cavity and second acoustic cavity, two the magnetic conduction components are placed in first acoustic cavity and second acoustic cavity respectively, the limit piece is clamped in first acoustic cavity and second acoustic cavity, the magnetic conduction component includes hua si and magnetic core, the limit piece and baffle clamp hua si, the magnetic core is fixedly connected with baffle, the magnetic core is fixedly connected with magnetic sheet, the first acoustic cavity and second acoustic cavity are all covered with diaphragm, the diaphragm is fixedly connected with coil, the coil is placed between hua si and magnetic core.The utility model provides a kind of loudspeaker of double vibration and double magnetic circuit structure, by using double diaphragm and double acoustic cavity structure, more air vibration is promoted when loudspeaker works, to effectively enhance the low-frequency performance of loudspeaker.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker internal structure, and more particularly to a loudspeaker with a dual-vibration and dual-magnetic-circuit structure. Background Technology

[0002] In existing loudspeaker designs, the typical structure mainly consists of a magnetic circuit system, a diaphragm, and an acoustic cavity; when an audio signal drives the voice coil to move in the magnetic gap, it causes the diaphragm to vibrate, thereby radiating sound waves. However, existing loudspeakers generally adopt a single magnetic circuit structure and a single resonant cavity design. When this structure is in operation, the volume of air pushed by the diaphragm is limited, resulting in insufficient sound pressure level, especially low-frequency sound pressure level. Therefore, loudspeakers with this structure have a weak bass performance when reproducing music. Utility Model Content

[0003] The purpose of this invention is to provide a loudspeaker with a dual-vibration and dual-magnetic-circuit structure. By employing a dual-diaphragm and dual-cavity structure, the loudspeaker can drive more air vibrations during operation, thereby effectively enhancing the low-frequency performance of the loudspeaker.

[0004] The technical solution adopted by the loudspeaker with a dual-vibration and dual-magnetic-circuit structure disclosed in this utility model is as follows: The device includes a housing and two magnetically conductive assemblies. A partition is provided inside the housing, dividing the interior into a first sound cavity and a second sound cavity. The two magnetically conductive assemblies are respectively placed within the first and second sound cavities. A limiting plate is engaged in both the first and second sound cavities. Each magnetically conductive assembly includes a washer and a magnetic core. The limiting plate and the partition clamp the washer. The magnetic core is fixedly connected to the partition, and a magnetically conductive sheet is fixedly connected to the magnetic core. A diaphragm is covered on both the first and second sound cavities, and a coil is fixedly connected to the diaphragm, with the coil positioned between the washer and the magnetic core.

[0005] As a preferred embodiment, the first and second sound cavities extend from both ends of the housing and form two openings, with the diaphragm covering the openings.

[0006] As a preferred embodiment, the edge of the opening is provided with an annular step, the diaphragm is inserted into the annular step, and a cover plate is inserted into the annular step, with the cover plate touching the diaphragm.

[0007] As a preferred embodiment, the inner walls of both the first and second sound cavities are provided with multiple slots, and the limiting piece extends with multiple protrusions, which are engaged in the slots.

[0008] As a preferred embodiment, both the limiting plate and the washer are annular, the magnetic core is placed inside the washer, there is a gap between the magnetic core and the washer, and the coil is located within the gap.

[0009] As a preferred embodiment, the outer side of the housing is provided with a through hole that communicates with the first sound cavity and the second sound cavity.

[0010] The beneficial effects of the loudspeaker with a dual-vibration and dual-magnetic-circuit structure disclosed in this utility model are: By adopting a dual-diaphragm and dual-magnetic-conducting-component design, a first and second acoustic chamber separated by a partition are set inside the speaker. Each acoustic chamber is equipped with an independent magnetic-conducting component and is covered with a diaphragm, so that the two diaphragms can work together to drive more air vibration, effectively enhancing the sound pressure level of the speaker output, especially significantly improving the sound pressure performance in the low-frequency range, and overcoming the problem of weak bass caused by the limited volume of air to be driven in the traditional single magnetic circuit and single resonant cavity design. Furthermore, the two magnetic conductive components and the partition are securely confined within the housing by two limiting plates, and the design of the limiting structure makes the positioning and installation of each component more convenient and reliable. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a loudspeaker with a dual vibration and dual magnetic circuit structure according to this utility model.

[0012] Figure 2 This is a schematic diagram of the installation of the limiting plate of a loudspeaker with a dual vibration and dual magnetic circuit structure according to this utility model.

[0013] Figure 3 This is a cross-sectional view of a loudspeaker with a dual-vibration and dual-magnetic-circuit structure according to this utility model.

[0014] Figure 4 This is a schematic diagram of the diaphragm installation of a loudspeaker with a dual-vibration and dual-magnetic-circuit structure according to this utility model. Detailed Implementation

[0015] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings: Please refer to Figures 1-3 .

[0016] This utility model discloses a loudspeaker with a dual vibration and dual magnetic circuit structure, including a housing 1 and two magnetic conductive components 2; The housing 1 is provided with a partition 12, which is located at the center of the housing 1. The partition 12 divides the interior of the housing 1 into a first sound cavity and a second sound cavity. The outer contour of the partition 12 does not contact the inner wall of the housing 1, thereby increasing the space for air to be contained in the first and second sound cavities and increasing the amount of air that the diaphragm 3 can push. Furthermore, a through hole 111 communicating with the interior is provided on the outer side of the housing 1, and both the first sound cavity and the second sound cavity are connected to the through hole 111. Because this loudspeaker increases the amount of air that the diaphragm 3 can move, both the first and second sound chambers are connected to the outside through the through hole 111, so that the through hole 111 acts as an exhaust hole, allowing the diaphragm 3 to move more freely back and forth, reducing the resistance of the air inside the housing 1 to the diaphragm 3, improving efficiency and reducing distortion, and making the low frequency response more accurate. Furthermore, the first sound cavity and the second sound cavity extend from both ends of the housing 1, forming two openings at both ends of the housing 1; Two magnetic conductive components 2 are placed in the first sound cavity and the second sound cavity through two openings respectively. Limiting plates 13 are snapped into the first sound cavity and the second sound cavity. The limiting plates 13 are installed into the housing 1 through the openings. The limiting plates 13 touch the magnetic conductive components 2. The partition plate 12 is located between the two magnetic conductive components 2. The two magnetic conductive components 2 are located between the two limiting plates 13. The two limiting plates 13 are used to clamp the two magnetic conductive components 2 and the partition plate 12, thereby stably constraining the three in a suspended state inside the housing 1. Furthermore, the magnetic conductive component 2 includes a washer 21 and a magnetic core 22; in this embodiment, the washer 21 is preferably annular, and the outer contour of the washer 21 is flush with the outer contour of the partition 12; the two washer 21 are respectively fixedly connected to the surfaces at both ends of the partition 12. Furthermore, in this embodiment, the limiting piece 13 is preferably annular, and the limiting piece 13 is fixedly connected to the washer 21, so that the limiting piece 13 and the partition 12 clamp the washer 21; a plurality of protrusions 131 extend from the outer contour of the limiting piece 13, and in this embodiment, three protrusions 131 are preferably arranged around the outer contour of the limiting piece 13 at intervals, and the outer contour between two adjacent protrusions 131 on the limiting piece 13 is flush with the outer contour of the washer 21, thereby reducing the occupancy rate of the partition 12, the limiting piece 13 and the washer 21 on the space of the first sound cavity and the second sound cavity; Furthermore, the inner walls of both the first and second sound cavities are provided with multiple slots 112. In this embodiment, it is preferred that there are three slots 112 in both the first and second sound cavities, and the protrusion 131 is inserted into the slot 112. The slot 112 serves to fix the limiting piece 13 and also to position the limiting piece 13 in the housing 1, so that the partition 12 and the magnetic conductive assembly 2 are centered. Furthermore, the two magnetic cores 22 are fixedly connected to the surfaces at both ends of the partition 12, the magnetic cores 22 are located at the center of the washer 21, and there is a gap between the magnetic cores 22 and the washer 21. In this embodiment, the gap is preferably annular. A magnetic conductive sheet 221 is fixedly connected to the magnetic cores 22.

[0017] During installation, two washer 21s and two magnetic cores 22 are fixedly connected to both ends of the partition 12. The magnetic conductive sheet 221 is fixedly connected to the magnetic core 22. The partition 12, after installation, is placed into the interior of the housing 1 through one of the openings. Two limiting pieces 13 are placed into the first sound cavity and the second sound cavity through the two openings respectively. The protrusion 131 is fixedly inserted into the adjacent slot 112. The limiting piece 13 is fixedly connected to the washer 21, constraining it within the housing 1. The design of the above limiting structure makes the positioning and installation of each component more convenient and reliable.

[0018] Please refer to Figure 1 , Figure 3 and Figure 4 .

[0019] A diaphragm 3 is provided on both the first and second sound chambers, and the diaphragm 3 is provided on the opening; Furthermore, an annular step is provided at the edge of the opening, and the diaphragm 3 is inserted into the annular step; a cover plate 31 is inserted into the annular step. In this embodiment, the cover plate 31 is preferably circular, and the outer side of the cover plate 31 is fixedly connected to the annular step, thereby constraining the diaphragm 3 within the annular step. Furthermore, a coil 32 is fixedly connected to the diaphragm 3. The coil 32 is placed in the gap between the washer 21 and the magnetic core 22, so that when the diaphragm 3 vibrates and drives the coil 32 to move back and forth in the gap, the coil 32 is prevented from directly contacting the washer 21 and the magnetic core 22.

[0020] Please refer to Figures 1-4 .

[0021] When this speaker is running: An audio signal is input to the coils 32 on the two diaphragms 3, causing the coils 32 to reciprocate under the action of a magnetic field in the gap between the washer 21 and the magnetic core 22 of their respective magnetic components 2, thereby driving the diaphragms 3 on the first and second sound cavities to vibrate synchronously. Since the partition 12 is located at the center of the housing 1 and its outer contour does not contact the inner wall of the housing 1, the internal space of the first and second sound cavities is fully released, the volume of air that the diaphragm 3 can push is significantly increased, and the sound pressure output, especially the low frequency sound pressure level, is effectively enhanced. Meanwhile, both the first and second acoustic cavities are connected to the outside through the through hole 111 on the housing 1. The through hole 111, as an exhaust hole, can promote the air flow in the cavity when the diaphragm 3 vibrates, reduce air resistance, and make the diaphragm 3 move more freely. This not only improves the electroacoustic conversion efficiency but also reduces distortion, making the low-frequency response more accurate. Structurally, the two magnetic components 2 and the partition plate 12 are fixedly constrained in the housing 1 in a floating manner by the cooperation of the protrusions 131 on the two limiting plates 13 and the slots 112 on the inner wall of the sound cavity. This ensures that each component is centered and optimized while facilitating assembly, reducing the space occupied by the sound cavity, and providing a regular and sealed acoustic environment for the diaphragm 3 to vibrate. This further ensures the stability and sound purity when the dual vibration system works together, and ultimately enables the speaker to present a full, solid and low-distortion powerful bass effect in music reproduction.

[0022] This utility model provides a loudspeaker with a dual vibration and dual magnetic circuit structure. By adopting a dual diaphragm and dual magnetic components design, a first sound cavity and a second sound cavity separated by a partition are set inside the loudspeaker. Each sound cavity is equipped with an independent magnetic component and is covered with a diaphragm, so that the two diaphragms can work together to drive more air vibration, effectively enhancing the sound pressure level of the loudspeaker output, especially significantly improving the sound pressure performance in the low frequency range, and overcoming the problem of weak bass caused by the limited volume of air driven in the traditional single magnetic circuit and single resonant cavity design. Furthermore, the two magnetic conductive components and the partition are securely confined within the housing by two limiting plates, and the design of the limiting structure makes the positioning and installation of each component more convenient and reliable.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A loudspeaker with a dual-vibration and dual-magnetic-circuit structure, characterized in that, The device includes a housing and two magnetically conductive assemblies. The housing has a partition that divides the interior of the housing into a first acoustic cavity and a second acoustic cavity. The two magnetically conductive assemblies are respectively placed in the first acoustic cavity and the second acoustic cavity. Limiting plates are snapped into both the first acoustic cavity and the second acoustic cavity. The magnetic conductive assembly includes a washer and a magnetic core. The limiting plate and the partition clamp the washer. The magnetic core is fixedly connected to the partition. A magnetic conductive sheet is fixedly connected to the magnetic core. Both the first and second sound cavities are covered with diaphragms, and coils are fixedly connected to the diaphragms. The coils are placed between the washer and the magnetic core.

2. A loudspeaker with a dual-vibration and dual-magnetic-circuit structure as described in claim 1, characterized in that, The first and second sound cavities extend from both ends of the housing and form two openings, with the diaphragm covering the openings.

3. A loudspeaker with a dual-vibration and dual-magnetic-circuit structure as described in claim 2, characterized in that, The opening has an annular step at its edge, the diaphragm is inserted into the annular step, and a cover plate is inserted into the annular step, with the cover plate touching the diaphragm.

4. A loudspeaker with a dual-vibration and dual-magnetic-circuit structure as described in claim 1, characterized in that, The inner walls of the first and second sound cavities are provided with multiple slots, and the limiting piece has multiple protrusions extending from it, which are engaged in the slots.

5. A loudspeaker with a dual-vibration and dual-magnetic-circuit structure as described in claim 2, characterized in that, Both the limiting plate and the washer are circular rings. The magnetic core is placed inside the washer, and there is a gap between the magnetic core and the washer. The coil is located within the gap.

6. A loudspeaker with a dual-vibration and dual-magnetic-circuit structure as described in any one of claims 1, 3, or 5, characterized in that, The outer side of the housing has a through hole that communicates with the first sound cavity and the second sound cavity.

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