Loudspeaker

Abstract

A loudspeaker (100), comprising a housing (4) and a sound emitting unit (10) fixed to the housing (4); the sound emitting unit (10) comprises: a basket frame (1); a vibration system (2); a magnetic circuit system (3); spring damping elements (5), the spring damping elements (5) elastically connecting the magnetic circuit system (3) to the basket frame (1) and supporting the magnetic circuit system (3) in vibrating within an accommodating space; and counterbalances (6), the counterbalances (6) being fixed on the side of a magnetic bowl (32) away from the vibration system (2). The loudspeaker (100) forms another vibration system with the spring damping elements (5) by means of a magnetic (31) or the magnetic bowl (32); this vibration system as well as the vibration system (2) composed of a voice diaphragm (22), a dome (21), and a 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 (8) on the magnet (31); by means of adding a magnetic circuit through hole (34) in the magnetic circuit system (3) and optimizing the effect of air of the back volume (8) by means of a leakage hole (9) of the housing (4), a vibration reduction effect is further improved.

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, comprising 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 communicating with the sound outlet, the sound-emitting side of the sound-emitting unit facing the sound outlet, the shell further comprising a through leakage hole communicating with the rear cavity, and the sound-emitting unit comprising:

[0007] A frame fixed to the housing and having a storage space, a vibration system placed in the storage 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 fixed to the frame and, together with the frame and the vibration system, forms a sound-producing inner cavity; the magnetic circuit system is provided with a magnetic gap, and the voice coil and the diaphragm are fixed and inserted into the magnetic gap; the magnetic circuit system is also provided with a through magnetic circuit hole, which connects the sound-producing inner cavity with the rear cavity;

[0008] The spring damping element supports the magnetic circuit system to vibrate in the accommodation space.

[0009] 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; a pole core stacked on the side of the magnet close to the diaphragm; the magnet is spaced from the side wall to form the magnetic gap; the spring damping element is fixedly connected to the side wall or the magnetic bowl bottom wall.

[0010] Preferably, the magnetic circuit through hole includes a first magnetic circuit through hole passing through the pole core, a second magnetic circuit through hole passing through the magnetic steel, and a third magnetic circuit through hole passing through the bottom wall of the magnetic bowl.

[0011] Preferably, the first magnetic circuit through hole is arranged opposite to the second magnetic circuit through hole, and the second magnetic circuit through hole is arranged opposite to the third magnetic circuit through hole.

[0012] Preferably, the sound-emitting unit further includes a counterweight block accommodated in the rear cavity and fixed to the magnetic circuit system.

[0013] 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.

[0014] Preferably, the counterweight blocks include two, 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.

[0015] Preferably, the number of the through holes is one that passes through the geometric center of the magnetic circuit system, or a plurality of through holes that are spaced apart from each other and pass through the magnetic circuit system.

[0016] Preferably, the leakage hole is a tapered hole formed by punching from a side close to the magnetic circuit system to a side away from the magnetic circuit system, or a groove with a through hole formed by thinning.

[0017] Preferably, the interior of the magnetic circuit through hole is filled with a low flow resistance sound absorbing material. Beneficial effects

[0018] Compared to the prior art, the speaker of the present invention incorporates a spring damper element, which elastically connects the magnetic circuit system to the frame and supports the magnetic circuit system's vibration within the housing. This spring damper element forms a separate vibration system comprised of the magnet or bowl and the spring damper element. This vibration system, in contrast to 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 system reduces the effect of air in the rear chamber on the magnet. The addition of magnetic circuit holes and leakage holes through the housing optimize the air effect in the rear chamber, further enhancing the vibration reduction effect. Furthermore, the magnetic circuit system's resonant frequency and damping 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

[0019] 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:

[0020] FIG1 is a schematic diagram of the three-dimensional structure of a loudspeaker provided in an embodiment of the present invention;

[0021] FIG2 is a schematic diagram of an exploded three-dimensional structure of a speaker provided in an embodiment of the present invention;

[0022] FIG3 is a schematic structural diagram of a spring damping element of a loudspeaker provided in an embodiment of the present invention;

[0023] FIG4 is a cross-sectional view along line AA in FIG1 ;

[0024] FIG5 is a cross-sectional view along line BB in FIG1;

[0025] FIG6 is a schematic diagram of the magnetic bowl structure of a speaker provided in an embodiment of the present invention. 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 6. 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 sound unit 10 that is received in the receiving space and fixed to the shell 4. The sound unit 10 divides the receiving space into a front cavity 11 and a rear cavity 8. The sound-emitting side of the sound unit 10 faces the sound outlet 43. The shell 4 is also provided with a through leakage hole 9 that is connected to the rear cavity 8. The sound 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, 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; a pole core 33 stacked on the side of the magnet 31 close to the diaphragm 22; the magnet 31 is spaced from the side wall 33 and forms the magnetic gap 35; the voice coil 23 is inserted into the magnetic gap 35; the spring damping element 5 is fixedly connected to the side wall 322 or the magnetic bowl bottom wall 321.

[0031] In this embodiment, the magnetic circuit system 3, the basin frame 1, and the vibration system 2 together form a sound-generating cavity.

[0032] In this embodiment, the magnetic circuit system 3 is provided with a through magnetic circuit through hole 34, which connects the sound-emitting inner cavity with the rear cavity 8. The number of the magnetic circuit through holes 34 is one that passes through the geometric center of the magnetic circuit system 3 or multiple magnetic circuit through holes 34 that are spaced apart from each other and pass through the magnetic circuit system 3.

[0033] In this embodiment, the magnetic circuit through hole 34 further includes a first magnetic circuit through hole 341 extending through the pole core 33, a second magnetic circuit through hole 342 extending through the magnetic steel 31, and a third magnetic circuit through hole 343 extending through the magnetic bowl bottom wall 321. The first magnetic circuit through hole 341 is disposed opposite the second magnetic circuit through hole 342, and the second magnetic circuit through hole 342 is disposed opposite the third magnetic circuit through hole 343.

[0034] In this embodiment, the interior of the magnetic circuit through hole 34 is filled with a low flow resistance sound absorbing material to achieve fine adjustment of the air damping.

[0035] 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.

[0036] In this embodiment, the lower cover 42 is penetrated by a leakage hole 9, which is a conical hole punched from the side close to the magnetic circuit system 3 to the side away from the magnetic circuit system 3 or a groove with a through hole formed by thinning. This structure can shorten the equivalent air duct length to achieve the optimization of the rear cavity air effect.

[0037] 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.

[0038] 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.

[0039] 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.).

[0040] 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 .

[0041] 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.

[0042] In this embodiment, the counterweight 6 is fixed to the side of the magnetic bowl 32 away from the vibration system 2; the counterweight 6 effectively reduces the impact of the 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.

[0043] 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.

[0044] 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 two counterweight blocks 6 are respectively fixed to the side of the magnetic bowl bottom wall 321 away from the magnetic steel 31 and are arranged at intervals. The two counterweight blocks 6 are symmetrically arranged about the short axis of the magnetic bowl bottom wall 321.

[0045] 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.

[0046] Compared to the prior art, the speaker of the present invention incorporates a spring damper element, which elastically connects the magnetic circuit system to the frame and supports the magnetic circuit system's vibration within the housing. This spring damper element forms a separate vibration system comprised of the magnet or bowl and the spring damper element. This vibration system, in contrast to 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 system reduces the effect of air in the rear chamber on the magnet. The addition of magnetic circuit holes and leakage holes in the housing further optimize the air effect in the rear chamber, further enhancing the vibration reduction effect. The magnetic circuit system's resonant frequency and damping 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.

[0047] 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.

[0048] 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 housing is also provided with a through leakage hole, the leakage hole is connected to the rear cavity, and the sound-emitting unit includes: A basin frame fixed to the shell and having a storage space, a vibration system placed in the storage 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 fixed to the basin frame, and together with the basin frame and the vibration system, forms a sound-generating inner cavity; the magnetic circuit system is provided with a magnetic gap, and the voice coil and the diaphragm are fixed and inserted into the magnetic gap; the magnetic circuit system is also provided with a through magnetic circuit through hole, and the magnetic circuit through hole connects the sound-generating inner cavity with the back cavity; The spring damping element supports the magnetic circuit system to vibrate in the accommodation space.

2. The loudspeaker according to claim 1, characterized in that The magnetic circuit system includes a magnetic bowl and a magnetic steel fixed to the magnetic bowl, wherein the magnetic bowl includes a magnetic bowl bottom wall and a side wall extending from the outer peripheral side of the magnetic bowl bottom wall; a pole core stacked on a side of the magnetic steel close to the diaphragm; The magnetic steel is spaced apart from the side wall to form the magnetic gap; the spring damping element is fixedly connected to the side wall or the bottom wall of the magnetic bowl.

3. The loudspeaker according to claim 2, characterized in that The magnetic circuit through hole includes a first magnetic circuit through hole penetrating the pole core, a second magnetic circuit through hole penetrating the magnetic steel, and a third magnetic circuit through hole penetrating the bottom wall of the magnetic bowl.

4. The loudspeaker according to claim 3, characterized in that The first magnetic circuit through hole is arranged opposite to the second magnetic circuit through hole, and the second magnetic circuit through hole is arranged opposite to the third magnetic circuit through hole.

5. The loudspeaker according to claim 2, characterized in that The sound-generating unit also includes a counterweight block accommodated in the rear cavity and fixed to the magnetic circuit system.

6. 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.

7. The loudspeaker according to claim 5, characterized in that The two counterweight blocks are respectively fixed to a side of the bottom wall of the magnetic bowl away from the magnetic steel and are spaced apart from each other. The two counterweight blocks are symmetrically arranged about the short axis of the bottom wall of the magnetic bowl.

8. The loudspeaker according to claim 1, wherein: The number of the magnetic circuit through holes is one that passes through the geometric center of the magnetic circuit system or a plurality of through holes that are spaced apart from each other and pass through the magnetic circuit system.

9. The loudspeaker according to claim 1, characterized in that The leakage hole is a tapered hole formed by punching from a side close to the magnetic circuit system to a side away from the magnetic circuit system, or a groove with a through hole formed by thinning.

10. The loudspeaker according to claim 1, characterized in that The interior of the magnetic circuit through hole is filled with low flow resistance sound absorbing material.

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