Loudspeaker

Abstract

A loudspeaker (100), which relates to the field of electroacoustic conversion. The loudspeaker (100) comprises a housing (4) having an accommodating space and a sound emitting unit (10) accommodated within the accommodating space; the sound emitting unit (10) comprises a basket frame (1), a vibration system (2), a magnetic circuit system (3), and spring damping elements (5); the spring damping elements (5) elastically connect the magnetic circuit system (3) to the basket frame (1) and support the magnetic circuit system (3) vibrating within the accommodating space; counterbalances (6) are fixed to the magnetic circuit system (3); the loudspeaker (100) forms another vibration system (2) with the spring damping elements by means of a magnet or a magnetic bowl; this vibration system (2) as well as the vibration system (2) composed of a voice diaphragm (22), a dome (21), and the voice coil (23) are subjected to mutual forces and generate opposing vibrations, and thereby forces on the basket frame (1) are reduced; the counterbalances (6) are added in the magnetic circuit system (3), which reduce the effect of air in a back volume on the magnet, and a corresponding resonance frequency and damping of a magnetic circuit suspension system can be configured by means of adjusting the mass of the counterbalances (6) and the stiffness and damping of the spring damping elements (5), thereby achieving an optimal vibration isolation effect.

Description

A speaker Technical Field

[0001] The present invention relates to the field of electroacoustic conversion, and in particular to a loudspeaker. Background Art

[0002] In recent years, with the rapid development of information technology, the popularity of audio equipment has become increasingly higher. People's requirements for audio equipment are not limited to video and audio playback, but also require more reliability of audio equipment. Especially with the advent of the 5G era, mobile multimedia technology has also developed. Many audio devices have multiple entertainment functions, such as video playback, digital camera, games, GPS navigation, etc. As the functional requirements increase, the degree of integration of the components inside is getting higher and higher, and the requirements for product quality are becoming more and more stringent. Technical issues

[0003] Speakers are a common electronic component in audio equipment, primarily used for audio playback. Their structural design directly impacts audio playback quality. Existing speakers consist of a frame, a magnetic circuit system housed within the frame, and a vibration system. When the voice coil in the vibration system vibrates, stress is applied to the fixed boundary, which is then transmitted to the mobile device housing. At near-resonant frequencies or when the excitation voltage is high, the fixed boundary is susceptible to excessive stress, causing noticeable housing vibration, which in turn affects the user experience.

[0004] Therefore, it is necessary to provide a new loudspeaker to solve the above technical problems. Technical Solutions

[0005] The object of the present invention is to provide a loudspeaker capable of achieving an optimal vibration reduction effect under the condition that the entire unit is placed in a closed shell.

[0006] In order to achieve the above-mentioned object, the present invention provides a loudspeaker, which includes a shell having a receiving space, a sound outlet penetrating the shell and communicating with the receiving space, and a sound-emitting unit accommodated in the receiving space and fixed to the shell; the sound-emitting unit divides the receiving space into a front cavity and a rear cavity, the front cavity is communicated with the sound outlet, the sound-emitting side of the sound-emitting unit faces the sound outlet, and the sound-emitting unit includes

[0007] A frame fixed to the housing and having a receiving space, a vibration system placed in the receiving space, a magnetic circuit system for driving the vibration system to vibrate and produce sound, and a spring damping element elastically connecting the magnetic circuit system to the frame; the vibration system includes a diaphragm whose outer periphery is fixed to the frame, and a voice coil for driving the diaphragm to vibrate and produce sound; the magnetic circuit system is provided with a magnetic gap, and the voice coil is fixed to the diaphragm and inserted into the magnetic gap;

[0008] The spring damping element supports the magnetic circuit system to vibrate in the accommodation space; the sound-emitting unit also includes

[0009] A counterweight block is accommodated in the rear cavity and fixed to the magnetic circuit system.

[0010] Preferably, the magnetic circuit system includes a magnetic bowl and a magnet fixed to the magnetic bowl, the magnetic bowl includes a magnetic bowl bottom wall and a side wall bent and extended from the outer peripheral side of the magnetic bowl bottom wall; the magnet is spaced from the side wall and forms the magnetic gap; the spring damping element is fixedly connected to the side wall or the magnetic bowl bottom wall, and the counterweight is fixed to the side of the magnetic bowl bottom wall away from the magnet.

[0011] Preferably, the spring damping element includes a first stiffness layer, a damping layer stacked and fixed on the first stiffness layer, and a second stiffness layer stacked and fixed on the damping layer.

[0012] Preferably, the spring damping element is made of one or more of a single high-damping material, a polymer composite high-damping material, and a metal composite damping structure.

[0013] Preferably, the magnetic bowl is rectangular, and the spring damping elements include two, which are respectively located on two opposite sides of the short axis of the magnetic bowl or on two opposite sides of the long axis of the magnetic bowl.

[0014] Preferably, the spring damping element includes an inner fixing portion fixed to the bottom wall of the magnetic bowl close to the diaphragm, an outer fixing portion fixed to the bottom of the basin frame, and an elastic arm connecting the inner fixing portion and the outer fixing portion.

[0015] Preferably, the counterweight is attached to two opposite sides of the bottom wall of the magnetic bowl close to the rear cavity, or to the geometric center of the bottom wall of the magnetic bowl, or around the periphery of the bottom wall of the magnetic bowl.

[0016] Preferably, the two spring damping elements are respectively located on opposite sides of the short axis of the magnetic bowl, and the two counterweight blocks are respectively fixed to the bottom wall of the magnetic bowl and arranged at intervals, and the two counterweight blocks are symmetrically arranged about the short axis of the bottom wall of the magnetic bowl.

[0017] Preferably, the vibration system further includes a spherical dome covering the surface of the diaphragm.

[0018] Preferably, the shell includes a lower cover and an upper cover fixed to the lower cover, the sound outlet is provided on the upper cover, the sound unit is supported on the upper cover, and the sound unit, the upper cover and the lower cover together form the rear cavity. Beneficial effects

[0019] Compared to the prior art, the speaker of the present invention incorporates a spring damper element. One end of the spring damper element is connected to a magnet or a magnetic bowl, and the other end is connected to a frame. This forms a separate vibration system consisting of the magnet or magnetic bowl and the spring damper element. This vibration system is subject to an interaction force with the vibration system consisting of the diaphragm, dome, and voice coil, vibrating in the opposite direction, thereby reducing the force on the frame. The addition of a counterweight to the magnetic circuit system reduces the effect of air in the rear chamber on the magnet. The resonant frequency and damping of the magnetic circuit system can be adjusted by adjusting the mass of the counterweight and the stiffness and damping of the spring damper element to achieve optimal vibration isolation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0021] FIG1 is a schematic diagram of the three-dimensional structure of a loudspeaker provided in an embodiment of the present invention;

[0022] FIG2 is a schematic diagram of an exploded three-dimensional structure of a speaker provided in an embodiment of the present invention;

[0023] FIG3 is a schematic structural diagram of a spring damping element of a loudspeaker provided in an embodiment of the present invention;

[0024] FIG4 is a cross-sectional view along line AA in FIG1 ;

[0025] FIG5 is a cross-sectional view along line BB in FIG1 . Best Mode for Carrying Out the Invention

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Please refer to Figures 1 to 4 , an embodiment of the present invention provides a loudspeaker 100, which includes a shell 4 and a sound outlet 43 that passes through the shell 4 and is connected to the receiving space, and a sounding unit 10 that is received in the receiving space and fixed to the shell 4. The sounding unit 10 divides the receiving space into a front cavity 9 and a rear cavity 8, the front cavity 9 is connected to the sound outlet 43, and the sounding side of the sounding unit 10 faces the sound outlet 43. The sounding unit 10 includes a basin 1, a vibration system 2, a magnetic circuit system 3, a spring damping element 5, a counterweight 6 and an elastic support assembly 7.

[0028] Among them, the basin frame 1 is fixed to the shell 4 and has a accommodating space, the vibration system 2 and the magnetic circuit system 3 are placed in the accommodating space, the magnetic circuit system 3 is used to drive the vibration system 2 to vibrate and make sounds, and the vibration system 2 includes a diaphragm 22 whose outer periphery is fixed to the basin frame 1 and a voice coil 23 that drives the diaphragm 22 to vibrate and make sounds.

[0029] In this embodiment, the vibration system 2 further includes a spherical dome 21 covering the surface of the vibration membrane 22 .

[0030] In this embodiment, the magnetic circuit system 3 includes a magnetic bowl 32 fixed to the basin frame 1 and a magnet 31 fixed to the magnetic bowl 32; the magnetic bowl 32 includes a magnetic bowl bottom wall 321 and a side wall 322 bent and extended from the outer peripheral side of the magnetic bowl bottom wall 321 and fixed to the magnetic bowl 32; the magnet 31 is spaced from the side wall 322 and forms the magnetic gap 34; the voice coil 23 is fixed to the diaphragm 22 and inserted into the magnetic gap 34; the spring damping element 5 is fixedly connected to the side wall 322 or the magnetic bowl bottom wall 321, and the counterweight 6 is fixed to the side of the magnetic bowl bottom wall 321 away from the magnet 31.

[0031] In this embodiment, the shell 4 also includes a lower cover 42 and an upper cover 41 fixed to the lower cover 42, the sound outlet 43 is provided on the upper cover 41, the sound unit 10 is supported on the upper cover 41, and the sound unit 10, the upper cover 41 and the lower cover 42 together form the rear cavity 8.

[0032] In this embodiment, the spring damper element 5 elastically connects the magnetic circuit system 3 to the chassis 1, supporting the magnetic circuit system 3 in its vibration within the housing space. The spring damper element 5, together with the magnet 31 or the magnetic bowl 32, forms a separate vibration system from the vibration system 2. This vibration system, in conjunction with the vibration system 2 consisting of the diaphragm 22, dome 21, and voice coil 23, experiences an interaction force, vibrating in opposite directions, thereby reducing the force on the chassis 1. The stiffness and damping of the spring damper element 5 can be adjusted to optimize the vibration reduction effect.

[0033] In this embodiment, the spring damper element 5 includes a first stiffness layer 51, a damping layer 52 stacked and fixed to the first stiffness layer, and a second stiffness layer 53 stacked and fixed to the damping layer 52. It should be noted that the structure of the spring damper element 5 is not limited to three layers, and a multi-layer sandwich structure similar to the above structure can be implemented. This is feasible and the principles are the same.

[0034] In this embodiment, the spring damping element 5 is made of one or more of a single high-damping material (such as damping rubber, foam cotton, etc.), a polymer composite high-damping material (such as particle-mixed fiber-mixed and laminate-type composite materials), and a metal composite damping structure (such as high-damping metal, constrained layer damping structure, etc.).

[0035] In this embodiment, there are two spring damping elements 5 , which are respectively located on two opposite sides of the short axis of the magnetic bowl 32 or on two opposite sides of the long axis of the magnetic bowl 32 .

[0036] In this embodiment, the spring damping element 5 includes an inner fixing portion 54 fixed to the side of the magnetic bowl bottom wall 321 close to the diaphragm 22, an outer fixing portion 55 fixed to the bottom of the basin frame 1, and an elastic arm 56 connecting the inner fixing portion 54 and the outer fixing portion 55.

[0037] In this embodiment, the counterweight 6 is fixed to the magnetic circuit system 3; the counterweight 6 effectively reduces the effect of air in the rear cavity 8 on the magnetic steel 31. Alternatively, the magnetic steel 31 and the soft magnetic material can be partially reduced and replaced with the counterweight 6 to achieve a similar basic shape.

[0038] In this embodiment, the counterweight 6 is attached to opposite sides of the bottom wall 321 of the magnetic bowl close to the rear cavity 8, or attached to the geometric center of the bottom wall 321 of the magnetic bowl, or attached around the periphery of the bottom wall 321 of the magnetic bowl.

[0039] In this embodiment, the two spring damping elements 5 are respectively located on opposite sides of the short axis of the magnetic bowl 32, and the counterweight blocks 6 include two. The two counterweight blocks 6 are respectively fixed to the bottom wall 321 of the magnetic bowl and are arranged at intervals. The two counterweight blocks 6 are symmetrically arranged about the short axis of the bottom wall 321 of the magnetic bowl.

[0040] In this embodiment, the elastic support assembly 7 is disposed in spaces on opposite sides of the short axis of the frame 1. One end of the elastic support assembly 7 is fixed to the frame 1, and the other end is fixed to the voice coil 23. The elastic support assembly 7 is used to enhance the vibration effect of the diaphragm 22 and improve the acoustic performance of the speaker 100. It is also used to balance the swaying of the vibration system 2 and improve the stability of the speaker 100.

[0041] Compared to the prior art, the speaker of the present invention incorporates a spring damper element. One end of the spring damper element is connected to a magnet or a bowl, and the other end is connected to a frame. This forms a separate vibration system comprised of the magnet or bowl and the spring damper element. This vibration system, coupled with the vibration system comprised of the diaphragm, dome, and voice coil, experiences an interaction force, vibrating in the opposite direction, thereby reducing the force on the frame. The addition of a counterweight to the magnetic circuit reduces the effect of air in the rear chamber on the magnet. By adjusting the mass of the counterweight and the stiffness and damping of the spring damper element, the resonant frequency and damping of the magnetic circuit system can be adjusted to achieve optimal vibration isolation.

[0042] It should be noted that if other sound-generating methods are used but the unit is a dual vibration system designed by this patent, it still falls within the scope of the requirements of this patent; the rear cavity of the present invention is set on one side of the speaker unit. If other rear cavity structures are designed and filled with various sound-absorbing materials but the speaker unit is a dual vibration system designed by this invention, it still falls within the scope of the requirements of the present invention; if the module structure is different from the structure shown in the present invention but the unit is a dual vibration system designed by this invention, it still falls within the scope of the requirements of the present invention; the connection in the assembly process of the present invention is mainly gluing. If other connection methods are used but the unit is a dual vibration system designed by this invention, it still falls within the scope of the requirements of this patent.

[0043] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A loudspeaker, comprising a shell having a receiving space, a sound outlet penetrating the shell and communicating with the receiving space, and a sound-emitting unit received in the receiving space and fixed to the shell; the sound-emitting unit divides the receiving space into a front cavity and a rear cavity, the front cavity is communicated with the sound outlet, and the sound-emitting side of the sound-emitting unit faces the sound outlet, characterized in that: The sound-emitting unit includes A basin frame fixed to the shell and having a accommodating space, a vibration system placed in the accommodating space, a magnetic circuit system for driving the vibration system to vibrate and produce sound, and a spring damping element elastically connecting the magnetic circuit system to the basin frame; the vibration system includes a diaphragm whose outer periphery is fixed to the basin frame and a voice coil for driving the diaphragm to vibrate and produce sound; the magnetic circuit system is provided with a magnetic gap, and the voice coil is fixed to the diaphragm and inserted into the magnetic gap; the spring damping element supports the magnetic circuit system to vibrate in the accommodating space; the sound-emitting unit also includes a counterweight block accommodated in the rear cavity and fixed to the magnetic circuit system.

2. The loudspeaker according to claim 1, characterized in that The magnetic circuit system includes a magnetic bowl and a magnet fixed to the magnetic bowl, the magnetic bowl includes a magnetic bowl bottom wall and a side wall bent and extended from the outer peripheral side of the magnetic bowl bottom wall; the magnet is spaced from the side wall and forms the magnetic gap; the spring damping element is fixedly connected to the side wall or the magnetic bowl bottom wall, and the counterweight is fixed to the side of the magnetic bowl bottom wall away from the magnet.

3. The loudspeaker according to claim 1, characterized in that The spring damping element includes a first stiffness layer, a damping layer stacked and fixed on the first stiffness layer, and a second stiffness layer stacked and fixed on the damping layer.

4. The loudspeaker according to claim 1, characterized in that The spring damping element is made of one or more of a single high damping material, a polymer composite high damping material and a metal composite damping structure.

5. The loudspeaker according to claim 2, characterized in that The magnetic bowl is rectangular, and the spring damping elements include two spring damping elements, which are respectively located on two opposite sides of the short axis of the magnetic bowl or on two opposite sides of the long axis of the magnetic bowl.

6. The loudspeaker according to claim 5, characterized in that The spring damping element comprises an inner fixing portion fixed to the bottom wall of the magnetic bowl close to the diaphragm, an outer fixing portion fixed to the bottom of the basin frame, and an elastic arm connecting the inner fixing portion and the outer fixing portion.

7. The loudspeaker according to claim 5, characterized in that The counterweight is attached to two opposite sides of the bottom wall of the magnetic bowl close to the rear cavity, or to the geometric center of the bottom wall of the magnetic bowl, or to the periphery of the bottom wall of the magnetic bowl.

8. The loudspeaker according to claim 7, characterized in that The two spring damping elements are respectively located on opposite sides of the short axis of the magnetic bowl. The two counterweight blocks are respectively fixed to the bottom wall of the magnetic bowl and arranged at intervals. The two counterweight blocks are symmetrically arranged about the short axis of the bottom wall of the magnetic bowl.

9. The loudspeaker according to claim 1, characterized in that The vibration system also includes a spherical top covering the surface of the diaphragm.

10. The loudspeaker according to claim 1, characterized in that The shell includes a lower cover and an upper cover fixed to the lower cover, the sound outlet is arranged on the upper cover, the sound unit is supported by the upper cover, and the sound unit, the upper cover and the lower cover together form the back cavity.

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