Coaxial loudspeaker

Abstract

The coaxial loudspeaker comprises a yoke, a vibration system and a magnetic circuit system, the magnetic circuit system comprises a magnetic conducting assembly fixed to the yoke and a magnetic steel assembly, the magnetic conducting assembly comprises a first magnetic conducting plate in the shape of a ring, an inner side wall and an outer side wall fixed to the first magnetic conducting plate and arranged at intervals, and a second magnetic conducting plate fixed to the inner side wall at an end away from the first magnetic conducting plate, the magnetic steel assembly comprises a first magnetic steel forming a first magnetic gap at intervals with the inner side wall and a second magnetic steel forming a second magnetic gap with the outer side wall, the vibration system comprises a first vibration assembly and a second vibration assembly, the first vibration assembly comprises a first diaphragm and a first voice coil inserted into the first magnetic gap, and the second vibration assembly comprises a second diaphragm and a second voice coil inserted into the second magnetic gap. The present application has high internal space integration and high magnetic circuit utilization rate, and meets the requirements of the full frequency domain.

Description

[Technical Field]

[0001] This invention relates to the field of electroacoustic conversion technology, and more specifically, to a coaxial loudspeaker. [Background Technology]

[0002] A coaxial loudspeaker is a loudspeaker that integrates a tweeter unit and a woofer unit, and the tweeter unit and woofer unit are arranged coaxially. The sound sources of both the tweeter unit and the woofer unit of a coaxial loudspeaker are located on the front of the coaxial loudspeaker, that is, the sound emission direction of the two loudspeaker units is the same.

[0003] In related technologies, the tweeter and woofer units of coaxial loudspeakers each contain independent vibration systems and magnetic circuit systems, resulting in complex structures. The overall height of the coaxial loudspeaker, composed of coaxial tweeter and woofer units, increases, leading to inconvenient installation and reduced product applicability. Furthermore, the separate high and low frequency magnetic circuits also increase production costs and reduce the product's market competitiveness. Moreover, the effective area of ​​the diaphragm in the loudspeaker unit, which is far from the sound output surface, is limited in related technologies, making it impossible to meet the requirements of the full frequency range.

[0004] Therefore, it is necessary to provide a coaxial loudspeaker that is highly spatially integrated and meets the requirements of the entire sound range. [Summary of the Invention]

[0005] In view of the above problems, the present invention proposes a coaxial loudspeaker.

[0006] Specifically, the coaxial loudspeaker proposed in this invention includes a frame and a vibration system and a magnetic circuit system fixed to the frame. The magnetic circuit system includes a magnetically conductive assembly fixed to the frame and a magnet assembly fixed to the magnetically conductive assembly. The magnetically conductive assembly includes a first annular magnetically conductive plate, an inner wall fixed to the first magnetically conductive plate, an outer wall spaced around the inner wall, and a second magnetically conductive plate fixed to the inner wall at an end away from the first magnetically conductive plate. The magnet assembly includes a first magnet fixed to the side of the second magnetically conductive plate facing the inner wall and a second magnet fixed to the side of the second magnetically conductive plate away from the inner wall. The first magnet and the inner wall are spaced apart to form a first magnetic gap. The inner sidewall, the second magnetic plate, and the second magnet are spaced apart from the outer sidewall to form a second magnetic gap; the vibration system includes a first vibration component and a second vibration component spaced apart from each other. The first vibration component includes a first diaphragm fixed to the frame and a first voice coil fixed to the first diaphragm and inserted into the first magnetic gap. The second vibration component includes a second diaphragm and a second voice coil fixed to the second diaphragm and inserted into the second magnetic gap. The frame includes a first opening and a second opening spaced apart along the vibration direction. The second diaphragm is fixed to the frame and covers the second opening. When the second diaphragm vibrates, the sound waves are led out to the outside through the first opening.

[0007] Preferably, the coaxial loudspeaker further includes a support member for supporting the magnetic circuit system within the basket. The support member includes a support body fixed to the outer side wall and a plurality of support beams extending from the support body to the basket and fixed thereto, with the plurality of support beams spaced apart.

[0008] Preferably, the first diaphragm includes a first dome located at the center and a first folded ring surrounding the first dome, the outer edge of the first folded ring being fixed to the side of the first magnetic plate away from the outer sidewall.

[0009] Preferably, the first dome protrudes along the vibration direction and away from the first magnet, and the cross section of the first dome along the vibration direction is arc-shaped.

[0010] Preferably, the first vibration assembly further includes a first bracket fixed to the inner edge of the first folded ring, and the first voice coil is inserted into the first magnetic gap through the first bracket.

[0011] Preferably, the second diaphragm includes a second dome located in the middle and a second folded ring surrounding the second dome. The outer edge of the second folded ring is fixed to the frame. The second dome includes a central dome located in the middle and being flat, and an extension extending outward from the edge of the central dome to the inner edge of the second folded ring. The central dome is flat, and the second voice coil is fixed to the central dome.

[0012] Preferably, the projection of the first diaphragm along the vibration direction falls onto the top of the central sphere.

[0013] Preferably, the projection of the outer wall along the vibration direction falls onto the top of the central sphere.

[0014] Preferably, the second vibration component includes a second bracket fixed to the top of the central sphere, and the second voice coil is inserted into the second magnetic gap through the second bracket.

[0015] Preferably, the magnetic conductive assembly further includes a third magnetic conductive plate fixed to the side of the first magnet facing the first diaphragm and a fourth magnetic conductive plate fixed to the side of the second magnet facing the second diaphragm.

[0016] The coaxial loudspeaker of the present invention includes a frame and a vibration system and a magnetic circuit system fixed to the frame. The magnetic circuit system includes a magnetic guide assembly and a magnet assembly fixed to the frame. The magnetic guide assembly includes a first magnetic guide plate in the shape of an annular ring, an inner side wall and an outer side wall fixed to the first magnetic guide plate and spaced apart, and a second magnetic guide plate fixed to one end of the inner side wall away from the first magnetic guide plate. The magnet assembly includes a first magnet fixed to the second magnetic guide plate and spaced apart from the inner side wall to form a first magnetic gap, and a second magnet fixed to the second magnetic guide plate and forming a second magnetic gap with the outer side wall. The vibration system includes a first vibration assembly and a second vibration assembly spaced apart from each other. The first vibration assembly includes a first diaphragm fixed to the frame and a first voice coil fixed to the first diaphragm and inserted into the first magnetic gap. The second vibration assembly includes a second diaphragm and a second voice coil fixed to the second diaphragm and inserted into the second magnetic gap. The first and second vibration components share a single magnetic circuit system, effectively improving the space utilization rate inside the coaxial speaker and helping to control the overall height of the product. Furthermore, the magnetic guiding component in this invention enables the magnetic circuit to form a self-closed loop, achieving high-efficiency magnetic circuit utilization. The first diaphragm achieves high-frequency sound generation, while the second diaphragm achieves full-frequency sound generation, satisfying the requirements of the full frequency range. [Attached Image Description]

[0017] Figure 1 This is a three-dimensional structural diagram of the coaxial loudspeaker in this invention;

[0018] Figure 2 This is an exploded view of the coaxial loudspeaker in this invention;

[0019] Figure 3 yes Figure 1 A sectional view along line AA.

[0020] Figure 4 This is a three-dimensional structural diagram of the magnetic circuit system of the coaxial loudspeaker in this invention;

[0021] Figure 5 yes Figure 4 Sectional view along line BB;

[0022] Figure 6 This is a partial three-dimensional view of the coaxial loudspeaker in this invention;

[0023] Figure 7 yes Figure 6 A cross-sectional view along the CC line;

[0024] Figure 8 yes Figure 6 A cross-sectional view along line DD.

Detailed Implementation Methods

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be described in detail below with reference to specific embodiments, so that the above and other objects, features and advantages of the present invention will become clearer.

[0026] like Figure 1-8 As shown, the present invention provides a coaxial loudspeaker 100, which includes a frame 1 and a vibration system 2 and a magnetic circuit system 3 fixed to the frame 1; wherein the magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.

[0027] The magnetic circuit system 3 includes a magnetically conductive assembly 31 fixed to the frame 1 and a magnet assembly 32 fixed to the magnetically conductive assembly 31. Specifically, the magnetically conductive assembly 31 includes a first annular magnetically conductive plate 311, an inner wall 312 fixed to the first magnetically conductive plate 311, an outer wall 313 spaced around the inner wall 312, and a second magnetically conductive plate 314 fixed to the end of the inner wall 312 away from the first magnetically conductive plate 311. It should be noted that both the inner wall 312 and the outer wall 313 are annular structures and extend along the vibration direction. The inner wall 312 has an opening at both ends, and the second magnetically conductive plate 314 is fixed to the inner wall 312 and covers the opening at the end away from the first magnetically conductive plate 311. Furthermore, the first magnetically conductive plate 311, the inner wall 312, and the outer wall 313 are concentric ring structures. In this embodiment, the outer wall 313 is formed by bending and extending from the outer edge of the first magnetically conductive plate 311. The magnet assembly 32 includes a first magnet 321 fixed to the side of the second magnetic plate 314 facing the inner wall 312, and a second magnet 322 fixed to the side of the second magnetic plate 314 away from the inner wall 312. The first magnet 321 and the inner wall 312 are spaced apart to form a first magnetic gap 331. The inner wall 312, the second magnetic plate 314, and the second magnet 322, arranged sequentially along the vibration direction, are spaced apart from the outer wall 313 to form a second magnetic gap 332. This arrangement allows the first voice coil 212 and the second voice coil 222 to share a magnetic circuit, further reducing production costs.

[0028] The vibration system 2 includes a first vibration component 21 and a second vibration component 22 spaced apart from each other. The first vibration component 21 includes a first diaphragm 211 fixed to the frame 1 and a first voice coil 212 fixed to the first diaphragm 211 and inserted into a first magnetic gap 331. The second vibration component 22 includes a second diaphragm 221 fixed to the frame 1 and a second voice coil 222 fixed to the second diaphragm 221 and inserted into a second magnetic gap 332. When the first voice coil 212 is energized, it drives the first diaphragm 211 to vibrate and produce sound. When the second voice coil 222 is energized, it drives the second diaphragm 221 to vibrate and produce sound. Specifically, the frame 1 is also a ring structure. Therefore, the frame 1 includes a first opening 11 and a second opening 12 located at both ends along the vibration direction. In this embodiment, the second diaphragm 221 is fixed to the frame 1 and covers the second opening 12. When the second diaphragm 221 vibrates, the sound waves are led out to the outside through the first opening 11. In this embodiment, the first diaphragm 211 and the second diaphragm 221 are structures that produce sound on the same side.

[0029] Furthermore, the first diaphragm 211 includes a first dome 2111 located in the middle and a first folded ring 2112 surrounding the first dome 2111. The outer edge of the first folded ring 2112 is fixed to the surface of the first magnetic plate 311 on the side away from the outer wall 313. The first dome 2111 protrudes along the vibration direction and away from the first magnet 321, and the cross-section of the first dome 2111 along the vibration direction is arc-shaped. The second diaphragm 221 includes a second dome 2211 located in the middle and a second folded ring 2212 surrounding the second dome 2211. The outer edge of the second folded ring 2212 is fixed to the frame 1. The second dome 2211 includes a central dome 22111 located in the middle and flat in shape, and an extension 22112 extending outward from the edge of the central dome 22111 to the inner edge of the second folded ring 2212. The central dome 22111 is flat in shape, and the second voice coil 222 is fixed to the central dome 22111. To enhance the magnetic field performance of the magnetic circuit system 3, the projection of the first magnet 321 along the vibration direction falls onto the top 22111 of the central sphere.

[0030] Furthermore, the first vibration assembly 21 also includes a first bracket 213 fixed to the inner edge of the first folded ring 2112, and the first voice coil 212 is inserted into the first magnetic gap 331 through the first bracket 213. The second vibration assembly 22 includes a second bracket 223 fixed to the top of the central sphere 22211, and the second voice coil 222 is inserted into the second magnetic gap 332 through the second bracket 223.

[0031] Specifically, the coaxial loudspeaker 100 also includes a support member 4 that supports the magnetic circuit system 3 within the frame 1. The support member 4 includes a support body 41 fixed to the outer wall 313 and several support beams 42 extending from the support body 41 to the frame 1, with the support beams 42 spaced apart. It can be understood that the support body 41 is annular, encircling the outer side of the outer wall 313, and the support beams 42 are spaced apart circumferentially along the support body 41. Therefore, the spaced-apart support beams 42 create a sound-guiding channel, allowing the sound waves generated by the vibration of the second diaphragm 221 to be guided to the outside through the first opening 11.

[0032] To ensure the second voice coil 222 is more securely supported within the second magnetic gap 332, the coaxial loudspeaker 100 of this invention further includes a third support 5. Specifically, the third support 5 includes a support body 51 fixed to the second voice coil 222 and a support arm 52 extending from the support body 51 to the frame 1. Figures 6-8 As can be seen, an clearance groove 3131 is provided on the outer wall 313 to connect the second magnetic gap 332 with the internal space of the frame 1, and the support arm 52 passes through the clearance groove 3131 to connect with the second voice coil 222.

[0033] To ensure that the sound waves generated by the second diaphragm 221 have sufficient space to exit through the first opening 11, in this invention, the projection of the first diaphragm 211 along the vibration direction falls onto the top 22111 of the central sphere of the second diaphragm 221. That is, the area of ​​the first diaphragm 211 is set to be significantly smaller than that of the second diaphragm 221, so that there is sufficient distance between the first diaphragm 211 and the frame 1. Furthermore, the projection of the outer wall 313 along the vibration direction falls onto the top 22111 of the central sphere.

[0034] To enhance the magnetic field utilization of the magnetic circuit system 3, the magnetic conductive assembly 31 also includes a third magnetic conductive plate 315 fixed to the side of the first magnet 321 facing the first diaphragm 211 and a fourth magnetic conductive plate 316 fixed to the side of the second magnet 322 facing the second diaphragm 221, so that the magnetic circuit forms a self-closed loop and achieves high-efficiency magnetic circuit utilization.

[0035] The coaxial loudspeaker of the present invention includes a frame and a vibration system and a magnetic circuit system fixed to the frame. The magnetic circuit system includes a magnetic guide assembly and a magnet assembly fixed to the frame. The magnetic guide assembly includes a first magnetic guide plate in the shape of an annular ring, an inner side wall and an outer side wall fixed to the first magnetic guide plate and spaced apart, and a second magnetic guide plate fixed to one end of the inner side wall away from the first magnetic guide plate. The magnet assembly includes a first magnet fixed to the second magnetic guide plate and spaced apart from the inner side wall to form a first magnetic gap, and a second magnet fixed to the second magnetic guide plate and forming a second magnetic gap with the outer side wall. The vibration system includes a first vibration assembly and a second vibration assembly spaced apart from each other. The first vibration assembly includes a first diaphragm fixed to the frame and a first voice coil fixed to the first diaphragm and inserted into the first magnetic gap. The second vibration assembly includes a second diaphragm and a second voice coil fixed to the second diaphragm and inserted into the second magnetic gap. The first and second vibration components share a single magnetic circuit system, effectively improving the space utilization rate inside the coaxial speaker and helping to control the overall height of the product. Furthermore, the magnetic guiding component in this invention enables the magnetic circuit to form a self-closed loop, achieving high-efficiency magnetic circuit utilization. The first diaphragm achieves high-frequency sound generation, while the second diaphragm achieves full-frequency sound generation, satisfying the requirements of the full frequency range.

[0036] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A coaxial loudspeaker, comprising a frame and a vibration system and a magnetic circuit system fixed to the frame, the magnetic circuit system comprising a magnetically conductive assembly fixed to the frame and a magnet assembly fixed to the magnetically conductive assembly, characterized in that, The magnetic conductive assembly includes a first annular magnetic conductive plate, an inner wall fixed to the first magnetic conductive plate, an outer wall spaced around the inner wall, and a second magnetic conductive plate fixed to the inner wall at an end away from the first magnetic conductive plate. The magnet assembly includes a first magnet fixed to the second magnetic conductive plate on the side facing the inner wall and a second magnet fixed to the second magnetic conductive plate on the side away from the inner wall. The first magnet and the inner wall are spaced apart to form a first magnetic gap, and the inner wall, the second magnetic conductive plate, and the second magnet and the outer wall are spaced apart to form a second magnetic gap. The vibration system includes a first vibration assembly and a second vibration assembly spaced apart from each other. The first vibration assembly includes a first diaphragm fixed to the frame and a first voice coil fixed to the first diaphragm and inserted into the first magnetic gap. The second vibration assembly includes a second diaphragm and a first voice coil fixed to the second diaphragm on the side facing the magnetic circuit system. The coaxial loudspeaker includes a second support bracket and a second voice coil fixed to the second diaphragm and inserted into the second magnetic gap. The frame includes a first opening and a second opening spaced apart along the vibration direction. The second diaphragm is fixed to the frame and covers the second opening. The coaxial loudspeaker also includes a support member that supports the magnetic circuit system within the frame. The support member includes a support body fixed to the outer wall and a plurality of support beams extending from the support body to the frame. The plurality of support beams are spaced apart so that sound waves are discharged to the outside through the first opening when the second diaphragm vibrates. The projection of the second voice coil along the vertical vibration direction falls completely into the magnetic circuit system and partially overlaps with the first magnet. The first diaphragm extends out of the first opening. The first diaphragm achieves high-frequency sound emission, and the second diaphragm achieves full-frequency sound emission. The first diaphragm and the second diaphragm emit sound from the same side.

2. The coaxial loudspeaker according to claim 1, characterized in that, The first diaphragm includes a first dome located in the middle and a first folded ring surrounding the first dome, the outer edge of the first folded ring being fixed to the side of the first magnetic plate away from the outer sidewall.

3. The coaxial loudspeaker according to claim 2, characterized in that, The first spherical dome protrudes along the vibration direction and away from the first magnet, and the cross-section of the first spherical dome along the vibration direction is arc-shaped.

4. The coaxial loudspeaker according to claim 2, characterized in that, The first vibration assembly further includes a first bracket fixed to the inner edge of the first folded ring, and the first voice coil is inserted into the first magnetic gap through the first bracket.

5. The coaxial loudspeaker according to claim 1, characterized in that, The second diaphragm includes a second dome located in the middle and a second folded ring surrounding the second dome. The outer edge of the second folded ring is fixed to the frame. The second dome includes a central dome located in the middle and being flat, and an extension extending outward from the edge of the central dome to the inner edge of the second folded ring. The central dome is flat, and the second voice coil is fixed to the central dome.

6. The coaxial loudspeaker according to claim 5, characterized in that, The projection of the first diaphragm along the vibration direction falls onto the top of the central sphere.

7. The coaxial loudspeaker according to claim 5, characterized in that, The projection of the outer wall along the vibration direction falls onto the top of the central sphere.

8. The coaxial loudspeaker according to claim 7, characterized in that, The second bracket is fixed to the top of the central sphere.

9. The coaxial loudspeaker according to claim 1, characterized in that, The magnetic conductive assembly further includes a third magnetic conductive plate fixed to the side of the first magnet facing the first diaphragm and a fourth magnetic conductive plate fixed to the side of the second magnet facing the second diaphragm.

Images