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CN-120034762-B - Sound box

CN120034762BCN 120034762 BCN120034762 BCN 120034762BCN-120034762-B

Abstract

The embodiment of the application provides a sound box, wherein a shell of the sound box comprises two cavities, a first loudspeaker is arranged in a first cavity, and a second loudspeaker is arranged in a second cavity. The first cavity is of a resonant design and is matched with the first loudspeaker, so that the size of the cavity is reduced, the low frequency is expanded, and the slowness parameter of the first loudspeaker is greater than 3 and greater than that of the second loudspeaker. Wherein, r= (m×s S )/D, R is a slowness parameter, m is a vibration mass of the speaker, S S is compliance of the speaker, and D is a caliber of the speaker. The second cavity is of a lightweight design, is matched with the second loudspeaker, and expands high frequency. The sound box frequency band is greatly expanded by organically combining the two cavities, so that the small sound box can also emit shocking sound, and the volume of the large sound box can be obviously reduced.

Inventors

  • WANG MEIYI
  • ZHOU PENG

Assignees

  • 广州市乐访信息科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250118

Claims (10)

  1. 1. A sound box, comprising: A housing having a first cavity and a second cavity; the first loudspeaker is arranged in the first cavity, and the first cavity is a resonant cavity; The second loudspeaker is arranged in the second cavity; The ratio of the slowness parameter of the first loudspeaker to the slowness parameter of the second loudspeaker is greater than A, A is 5-15, and the slowness parameter of the first loudspeaker is greater than 3; wherein, r= (m×s S )/D, R is a slowness parameter, m is a vibration mass of the speaker, S S is compliance of the speaker, and D is a caliber of the speaker; the weight ratio parameter of the first loudspeaker is larger than that of the second loudspeaker, and the weight ratio parameter of the first loudspeaker is larger than 1; wherein q=m/(S m ×l), Q is a weight parameter, m is a vibration mass of the speaker, S m is a vibration area of the speaker, L is a motion stroke, and is one tenth of a diameter of a vibration surface of the speaker; The shape of the vibrating diaphragm of the first loudspeaker is changed from a conical shape or a dome shape to a straight structure so as to reduce the thickness of the first loudspeaker.
  2. 2. The loudspeaker of claim 1, wherein the ratio of the volume of the first cavity to the volume of the second cavity is (6-9): 4-1.
  3. 3. The loudspeaker of claim 1, wherein the slowness parameter of the second speaker is less than 1.
  4. 4. The loudspeaker of claim 1, wherein the paper, plastic dust cap and diaphragm material in the first speaker are replaced with metallic stainless steel material and the diaphragm thickness of the first speaker is increased.
  5. 5. The loudspeaker of claim 1, wherein the first speaker has a metal voice coil skeleton directly connected to a metal diaphragm of the first speaker to increase weight and promote heat conduction and dissipation.
  6. 6. The loudspeaker of claim 1, wherein the voice coil of the first speaker is weighted by increasing a diameter, a number of turns, and a wire diameter of the voice coil of the first speaker.
  7. 7. The loudspeaker of claim 1, comprising a passive radiator and an amplitude limiting mechanism; The shell is provided with an opening communicated with the first cavity, and the passive radiator is arranged in the opening; the amplitude limiting mechanism is arranged on the shell, and the amplitude limiting mechanism is positioned on the side part of the passive radiator.
  8. 8. The loudspeaker of claim 7, wherein the slowness parameter of the passive radiator is greater than the slowness parameter of the second speaker and the slowness parameter of the passive radiator is greater than 3.
  9. 9. The sound box according to any one of claims 1 to 8, wherein the sound box is for an automobile; The first cavity of audio amplifier is located the door below of car, the second cavity of audio amplifier is located the A post of car.
  10. 10. The loudspeaker of any one of claims 1-8, wherein the number of first cavities is one or more; The number of the second cavities is one or more.

Description

Sound box Technical Field The application relates to the technical field of acoustics, in particular to a sound box. Background When the loudspeaker box works, sound is mainly produced through the internal loudspeaker unit, and the loudspeaker unit mainly comprises a permanent magnet, a voice coil, a vibrating diaphragm and the like. The principle of sound production of the speaker unit is based on electromagnetic induction phenomenon. When an audio current passes through the voice coil, a magnetic field is generated, which interacts with the magnetic field of the permanent magnet, causing the voice coil to vibrate in an axial direction. The vibration of the voice coil drives the vibrating diaphragm to vibrate, so that the surrounding air generates density change to form sound waves. The sound waves travel through the air into the human ear, where they are perceived as sound. In order to enable the loudspeaker box to simultaneously have high, medium and low three sounds, a multi-loudspeaker scheme is generally adopted, namely, each loudspeaker is responsible for corresponding sounds, however, for a small loudspeaker box, the size and the number of existing loudspeaker units are reduced, so that a traditional small loudspeaker box often adopts a scheme of a two-half frequency loudspeaker box, namely, two loudspeaker units, one loudspeaker is responsible for high-pitched sound, and the other loudspeaker is responsible for low-pitched sound and medium-pitched sound, so that the two loudspeaker units are both prone to lightening a vibration system so as to meet the use requirements of small volume convenience, but the vibration system is in a light-weight mode, good in middle-high frequency effect is achieved when the vibration system is applicable, and high low-frequency resonant frequency is caused when the vibration system is applicable to low frequency, so that the efficiency in low-frequency use is not ideal. Furthermore, the traditional large loudspeaker box has a plurality of cavities, and the whole volume of the loudspeaker box is quite large. This arrangement is common if a better low frequency is required, and an extra very bulky subwoofer is required. This results in a bulky and bulky sound box system, inconvenient to handle, space consuming, and sometimes visually impaired. In addition, in the sound box market which is convenient to move, a technology is urgently needed to miniaturize a large-sized sound box on the basis of basically maintaining good sound quality. Disclosure of Invention In order to solve one of the above technical drawbacks, an embodiment of the present application provides a sound box. The invention adopts the following technical scheme: A sound box, comprising: A housing having a first cavity and a second cavity; the first loudspeaker is arranged in the first cavity, and the first cavity is a resonant cavity; The second loudspeaker is arranged in the second cavity; the slowness parameter of the first loudspeaker is greater than that of the second loudspeaker, and the slowness parameter of the first loudspeaker is greater than 3; Wherein, r= (m×s S)/D, R is a slowness parameter, m is a vibration mass of the speaker, S S is compliance of the speaker, and D is a caliber of the speaker. Optionally, the ratio of the volume of the first cavity to the volume of the second cavity is (6-9): 4-1. Optionally, the slowness parameter of the second speaker is less than 1. Optionally, the paper part, the plastic dust cap, the vibrating diaphragm material and other parts in the first speaker are replaced by high-density materials such as metal stainless steel, and the thickness of the vibrating diaphragm of the first speaker is increased. Optionally, the first speaker has a high-density metal voice coil skeleton, and the high-density metal voice coil skeleton is directly connected to the metal diaphragm of the first speaker, so as to increase weight and promote heat conduction and heat dissipation effects. Optionally, the shape of the diaphragm of the first speaker is changed from a conical shape, a dome shape, or the like to a flat structure, so as to reduce the thickness of the first speaker. Optionally, the voice coil of the first speaker is weighted by increasing the diameter, number of turns, and wire diameter of the voice coil of the first speaker. Optionally, the sound box comprises a passive radiator and an amplitude limiting mechanism; The shell is provided with an opening communicated with the first cavity, and the passive radiator is arranged in the opening; the amplitude limiting mechanism is arranged on the shell, and the amplitude limiting mechanism is positioned on the side part of the passive radiator. Optionally, the slowness parameter of the passive radiator is greater than the slowness parameter of the second speaker and the slowness parameter of the passive radiator is greater than 3. Optionally, the speakers have a weight ratio parameter, the weight ratio parameter of the f