CN111385725A

CN111385725A - Loudspeaker

Info

Publication number: CN111385725A
Application number: CN201911349348.0A
Authority: CN
Inventors: 吴树文; 张旺
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-07-07
Anticipated expiration: 2039-12-24
Also published as: CN111385725B

Abstract

The invention discloses a loudspeaker, which comprises a vibrating diaphragm, a voice coil and central magnetic steel, wherein the voice coil is fixed below the vibrating diaphragm and used for driving the vibrating diaphragm, the central magnetic steel is also positioned below the vibrating diaphragm and positioned in the voice coil, a magnetic field is formed on the peripheral side of the central magnetic steel, the voice coil is suspended in the magnetic field, so that when the voice coil is electrified, the magnetic field is cut in the magnetic field to generate an up-and-down force to push the vibrating diaphragm, an armature used for replacing a ball top is arranged below the vibrating diaphragm, the armature is positioned above the central magnetic steel, the armature can generate an S/N pole due to the electrification of the voice coil, the polarity is changed along with the change of current, and the armature and the central magnetic steel can generate an attractive force and a repulsive force which are changed alternately, so that the BL.

Description

Loudspeaker

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a loudspeaker.

Background

With the continuous development of scientific technology, more and more electronic products are applied to the speaker as the sound producing component thereof, and the performance requirements of people on the speaker are higher and higher. In the existing speaker in the related art, the sound film is directly glued with the dome, the coil is powered on, the sound film is pushed by cutting the magnetic field lines in the magnetic field to generate up and down force, sound is generated, and the vibration of the dome is utilized to push the air to flow, so that energy is dissipated. However, when the coil is energized to cut the magnetic field lines in the magnetic field, the dome does not generate magnetism, i.e., does not generate S/N poles, but is used to purely push air to dissipate energy, resulting in poor overall performance of the speaker and poor rigidity of the dome.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a loudspeaker for improving the overall performance of the loudspeaker and meeting the design requirement.

The purpose of the invention is realized by adopting the following technical scheme:

a loudspeaker comprises a vibrating diaphragm, a voice coil and central magnetic steel, wherein the voice coil is fixed below the vibrating diaphragm and used for driving the vibrating diaphragm, the central magnetic steel is positioned below the diaphragm and in the voice coil, a magnetic field is formed on the peripheral side of the central magnetic steel, the voice coil is suspended in the magnetic field, so that when the voice coil is electrified, the vibrating diaphragm is pushed by cutting a magnetic field line in a magnetic field to generate an up-and-down force, an armature is arranged below the vibrating diaphragm and is positioned above the central magnetic steel, the armature is positioned in the voice coil, moreover, the upper surface of the armature is fixed on the diaphragm, the side surface of the armature is fixed on the inner wall of the voice coil, the armature can generate magnetism due to the electrification of the voice coil, the polarity of the armature changes along with the change of current, so that the armature can generate an alternating attractive force and repulsive force with the central magnetic steel.

Preferably, an annular conductive portion is disposed at an upper end of the voice coil along a circumferential direction, and the annular conductive portion is in direct contact with the diaphragm.

Preferably, the armature is disposed inside the annular conductive portion, and a peripheral edge of the armature is fixedly connected to the annular conductive portion.

Preferably, the loudspeaker further comprises an auxiliary assembly, the auxiliary assembly comprises a magnetic yoke and a basin frame, the magnetic yoke is accommodated and fixed in the basin frame, the magnetic yoke is used for installing the central magnetic steel, and the peripheral edge of the vibrating diaphragm is fixed on the upper surface of the basin frame.

Compared with the prior art, the invention has the beneficial effects that:

according to the loudspeaker, the armature is additionally arranged between the central magnetic steel and the vibrating diaphragm, the armature is positioned in the voice coil and connected with the vibrating diaphragm, the voice coil is electrified to cut a magnetic field line in a magnetic field to generate force, and simultaneously the armature can generate S/N poles (S: south pole, N: north pole) due to the electrification of the voice coil, and the armature can generate alternately changed attraction force and repulsion force with the central magnetic steel due to the change of the polarity of the armature along with the change of current, so that the BL value of the loudspeaker is increased, the integral performance of the loudspeaker can be greatly improved when the loudspeaker works, and the design requirement is met; in addition, compared with the ball top of the loudspeaker in the related art, the armature of the invention has better rigidity, and can improve the strength and stability of the loudspeaker.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

fig. 2 is an exploded view of the present invention.

In the figure: 1. vibrating diaphragm; 10. a first flat portion; 11. a folded ring part; 12. a second flat portion; 2. an armature; 3. a voice coil; 30. an annular conductive portion; 4. central magnetic steel; 40. magnetic steel; 41. a pole piece; 5. an auxiliary component; 50. a basin stand; 51. and a magnetic yoke.

Detailed Description

The present invention will be described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the following description, various embodiments or technical features may be arbitrarily combined to form a new embodiment without conflict.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The implementation mode is as follows:

as shown in fig. 1 and fig. 2, the loudspeaker of the present embodiment mainly includes a diaphragm 1, an auxiliary component 5, a central magnetic steel 4, a voice coil 3, and an armature 2. The diaphragm 1 is composed of a first flat portion 10 located on the outer side, a second flat portion 12 located on the inner side, and a corrugated portion 11 located between the first flat portion 10 and the second flat portion 12. The auxiliary component 5 consists of a magnetic yoke 51 and a basin frame 50, the magnetic yoke 51 is accommodated and fixed in the basin frame 50, the central magnetic steel 4 is installed on the magnetic yoke 51, and the central magnetic steel 4 is positioned below the second flat part 12 of the diaphragm 1 and in the voice coil 3; in addition, the central magnetic steel 4 is composed of a magnetic steel 40 and a pole core 41 attached to the magnetic steel 40. The voice coil 3 is fixed below the diaphragm 1, that is, the voice coil 3 is fixed below the second flat portion 12 of the diaphragm 1, for driving the diaphragm 1. The peripheral edge of the diaphragm 1 is fixed on the upper surface of the frame 50, that is, the first flat part 10 of the diaphragm 1 is erected on the upper surface of the frame 50; the second flat part 12 of the diaphragm 1 is arranged on the armature 2 for replacing the ball top and is positioned above the armature 2, namely the armature 2 is positioned above the central magnetic steel 4, the upper surface of the armature 2 is fixed on the diaphragm 1, and the armature 2 is positioned in the voice coil 3, of course, the side surface of the armature 2 is also fixed on the inner wall of the voice coil 3; the corrugated portion 11 of the diaphragm 1 is recessed downward.

Because the magnetic field is formed on the peripheral side of the central magnetic steel 4, the voice coil 3 is at least partially suspended in the magnetic field, so that when the voice coil 3 is electrified, the magnetic field is cut in the magnetic field to generate up-and-down force, and the voice coil 3 is connected with the second flat part 12 of the vibrating diaphragm 1, so that the vibrating diaphragm 1 is driven by the voice coil 3 to vibrate, further, driving force is generated, and the vibrating diaphragm 1 continuously vibrates and resonates with the surrounding air to make sound. Meanwhile, when the voice coil 3 is electrified to cut a magnetic field line in a magnetic field to generate force, the armature 2 generates magnetism, so that the armature 2 generates S/N poles (S: south pole, N: north pole) due to the electrification of the voice coil 3, and because the polarity of the armature 2 changes along with the change of current, the armature 2 and the central magnetic steel 4 can generate alternately changed attraction force and repulsion force, so that the BL value of the loudspeaker is increased, and the loudspeaker can greatly improve the overall performance of the loudspeaker and meet the design requirement when working.

It should be noted that the BL value is an important parameter of the speaker, namely, called force coefficient, and is derived from the most basic formula of the speaker, that is, the force F ═ BLI received by the current-carrying conductor in the magnetic field, B is the magnetic flux density of the magnetic gap, L is the length of the wire of the voice coil 3, and I is the wire current. Because the armature 2 generates magnetic force under the condition that the voice coil 3 is electrified, the magnetic flux density of the magnetic gap is increased, the BL value of the loudspeaker is improved, and the better the characteristic of the SPL (sound pressure curve), the integral performance of the loudspeaker is greatly improved when the loudspeaker works, and the design requirement is met.

In this embodiment, preferably, an annular conductive portion 30 is provided along the circumferential direction at the upper end of the voice coil 3, the annular conductive portion 30 is fixedly connected to the voice coil 3, and the armature 2 is positioned inside the annular conductive portion 30 and fixed to the annular conductive portion 30. That is, the armature 2 is located in the hollow area of the annular conductive part 30, the periphery of the armature 2 is fixedly connected with the annular conductive part 30 of the voice coil 3, and of course, the annular conductive part 30 directly contacts with the diaphragm 1, so that the voice coil 3 drives the diaphragm 1 to vibrate, and the armature 2 can vibrate synchronously with the diaphragm 1, so that the sound effect generated by the speaker is better.

In addition, compared with the dome of the loudspeaker in the related prior art, the armature 2 of the invention can provide BL value while pushing air to dissipate energy, so as to improve the overall performance of the loudspeaker of the invention; and compared with the ball top, the armature 2 has better rigidity, so that the stability of the loudspeaker in operation can be improved.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. A loudspeaker, includes vibrating diaphragm, voice coil loudspeaker voice coil and central magnet steel, the voice coil loudspeaker voice coil is fixed be used for the drive the vibrating diaphragm below the vibrating diaphragm, central magnet steel is located the vibrating diaphragm below and lie in among the voice coil loudspeaker voice coil, the week side of central magnet steel is formed with magnetic field, the voice coil loudspeaker voice coil suspension in the magnetic field, make when the voice coil loudspeaker voice coil circular telegram, promote through cutting the power that magnetic field line produced about in the magnetic field the vibrating diaphragm, its characterized in that: the armature is arranged below the vibrating diaphragm and located above the central magnetic steel, the armature is located in the voice coil, the upper surface of the armature is fixed on the vibrating diaphragm, the side face of the armature is fixed on the inner wall of the voice coil, the armature can generate magnetism due to the energization of the voice coil, the polarity of the armature changes along with the change of current, and the armature and the central magnetic steel can generate alternately changed attraction force and repulsion force.

2. A loudspeaker according to claim 1, wherein: the upper end of the voice coil is provided with an annular conductive part along the circumferential direction, the annular conductive part is located at the upper end of the voice coil, and the annular conductive part is directly contacted with the vibrating diaphragm.

3. A loudspeaker according to claim 2, wherein: the armature is disposed inside the annular conductive portion, and a peripheral edge of the armature is fixedly connected to the annular conductive portion.

4. A loudspeaker according to claim 1, wherein: the loudspeaker is characterized in that the loudspeaker further comprises an auxiliary assembly, the auxiliary assembly comprises a magnet yoke and a basin frame, the magnet yoke is accommodated and fixed in the basin frame, the magnet yoke is used for installing the central magnetic steel, and the peripheral edge of the vibrating diaphragm is fixed on the upper surface of the basin frame.