CN109362003B

CN109362003B - Loudspeaker

Info

Publication number: CN109362003B
Application number: CN201811566291.5A
Authority: CN
Inventors: 赵越; 刘迎新; 张成飞
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2024-04-30
Anticipated expiration: 2038-12-20
Also published as: CN109362003A

Abstract

The invention discloses a loudspeaker, comprising a vibration system, wherein the vibration system comprises a vibrating diaphragm and a voice coil assembly, and is characterized in that the voice coil assembly comprises: the first voice coil comprises a first body and two first leads, and the first body is provided with a first end part far away from the first leads; the second voice coil comprises a second body and two second leads, and the second body is provided with a second end part far away from the second leads; the first voice coil is connected with the second voice coil, and the first end part is attached to the second end part. The loudspeaker can realize correction of the position of the voice coil assembly, so that the voice coil assembly vibrates more stably in a magnetic field, the vibrating diaphragm vibrates more stably, and the overall acoustic performance of the loudspeaker is effectively improved. In addition, the first end part of the first voice coil far away from the first lead wire is connected with the second end part of the second voice coil far away from the second lead wire, so that the connection strength of the first voice coil and the second voice coil can be improved, and the overall stability of the voice coil assembly is improved.

Description

Loudspeaker

Technical Field

The invention relates to the field of acousto-electric equipment, in particular to a loudspeaker.

Background

The miniature electroacoustic device is widely applied to portable electronic equipment such as mobile phones, notebook computers, hearing aids and the like. With the rapid development of these portable electronic devices, the requirements of miniature electroacoustic devices applied thereto are also increasing. When alternating audio current passes through the voice coil, the voice coil generates a magnetic field which changes along with the change of the audio current, and the changed magnetic field and the magnetic field of the magnetic circuit system of the miniature electroacoustic device are attracted or repelled, so that the voice coil generates mechanical vibration to drive the vibrating diaphragm of the miniature electroacoustic device to vibrate, and the vibrating diaphragm vibrates to repeatedly push air to make sound, thus the voice coil influences the performance of the whole miniature electroacoustic device. The traditional voice coil is usually single integrated into one piece, and the voice coil should vibrate repeatedly in the position in advance under the ideal condition, but in actual operation, the voice coil can deviate from the setting in advance in the vibration process, leads to the magnetic field intensity through the voice coil to change after deviating from the position in advance to lead to the voice coil unstable in vibration, and then make the vibration of vibrating diaphragm also unstable, influence the holistic acoustic performance of electroacoustic device.

Disclosure of Invention

The invention mainly aims to provide a loudspeaker and aims to solve the technical problem of how to improve the acoustic performance of the loudspeaker.

In order to achieve the above object, the present invention provides a voice coil assembly, including a vibration system, the vibration system including a diaphragm and a voice coil assembly, the voice coil assembly including:

the first voice coil comprises a first body and two first leads, wherein the first body is provided with a first end part far away from the first leads;

The second voice coil comprises a second body and two second leads, and the second body is provided with a second end part far away from the second leads; the first voice coil is connected with the second voice coil, and the first end part is attached to the second end part.

Preferably, the first voice coil and the second voice coil are bonded through glue.

Preferably, the first voice coil and the second voice coil are formed by winding enamelled wires, the surfaces of the enamelled wires are coated with self-adhesive paint, and the first voice coil and the second voice coil are adhered together through the self-adhesive paint on the adjacent enamelled wires.

Preferably, the number of winding layers of the first voice coil in the radial direction is the same as that of the second voice coil.

Preferably, the inner diameter and the outer diameter of the first voice coil and the second voice coil are the same; and/or the number of turns of the first voice coil is the same as the number of turns of the second voice coil.

Preferably, the first body and the second body are rectangular ring structures, the first body and the second body having two opposite first corners and two opposite second corners;

The two first leads are respectively led out from the two first corner positions, and the two second leads are respectively led out from the two second corner positions.

Preferably, both the first leads and both the second leads are clockwise or counterclockwise.

Preferably, the speaker further comprises a frame, the frame has a receiving cavity, the voice coil assembly is received in the receiving cavity, and two first conductive portions electrically connected to the two first leads and two second conductive portions electrically connected to the two second leads are disposed on the frame.

Preferably, the vibration system further comprises a centering support piece fixed with the vibrating diaphragm;

the centering support piece comprises an inner fixing part connected with the central part of the vibrating diaphragm, an outer fixing part connected with the edge part of the vibrating diaphragm and a cantilever connected between the inner fixing part and the outer fixing part;

The inner fixing part is provided with an inner bonding pad, the outer fixing part is provided with an outer bonding pad, and the two first leads and the two second leads are electrically connected with the inner bonding pad.

Preferably, the inner fixing portion is provided with four inner bonding pads, the outer fixing portion is provided with four outer bonding pads which are electrically connected with the four inner bonding pads in a one-to-one correspondence manner, and the two first leads and the two second leads are respectively electrically connected with the four inner bonding pads.

Preferably, the first voice coil and the second voice coil are connected in series.

According to the loudspeaker, the first voice coil and the second voice coil which are arranged in a split mode are connected, so that in the working process of the voice coil assembly, the positions of the first voice coil and the second voice coil in a magnetic field are different, and therefore the magnetic induction intensities penetrating through the first voice coil and the second voice coil are different, induced electromotive forces generated by the first voice coil and the second voice coil are different, and the relative positions of the first voice coil and the second voice coil in the magnetic field, namely the vibration position of the whole voice coil assembly in the magnetic field, can be calculated in real time by detecting the voltage difference of the connection position of the first voice coil and the second voice coil. If the voice coil assembly deviates from the preset position in the vibration process, the positions of the first voice coil and the second voice coil are changed, and the magnetic induction intensity passing through the first voice coil and the second voice coil is also changed at the moment, so that the induced electromotive force generated by the first voice coil and the second voice coil is also changed, namely, the voltage difference at the joint of the first voice coil and the second voice coil is changed, the integral offset of the voice coil assembly can be obtained by detecting the change of the voltage difference, the voice coil assembly can be returned to the preset position in a mode of externally inputting compensation current, the correction of the position of the voice coil assembly is realized, the vibration of the voice coil assembly in a magnetic field is more stable, the vibration of the vibrating diaphragm is also more stable, and the integral acoustic performance of the loudspeaker is effectively improved. In addition, the first end part of the first voice coil far away from the first lead wire is connected with the second end part of the second voice coil far away from the second lead wire, so that the reliability allowance of connection of the first voice coil and the second voice coil can be increased, the connection strength of the first voice coil and the second voice coil is improved, and the overall stability of the voice coil assembly is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a voice coil assembly according to an embodiment of the present invention;

fig. 2 is an exploded view of the structure of an embodiment of the speaker of the present invention.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name	Reference numerals	Name of the name
						10	First voice coil	11	First body	12	First lead wire
13	First end portion	20	Second voice coil	21	Second body
						22	Second lead	23	Second end portion	72	Side magnet
50	Reinforcing part	60	Centering support piece	30	Basin stand
						80	Central magnetic conductive plate	71	Center magnet	40	Vibrating diaphragm
70	Magnetic conductive yoke

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a loudspeaker.

In an embodiment of the present invention, as shown in fig. 1 and 2, the speaker includes a vibration system including a diaphragm 40 and a voice coil assembly, the voice coil assembly including:

a first voice coil 10 comprising a first body 11 and two first leads 12, the first body 11 having a first end 13 adjacent the first leads 12;

A second voice coil 20 comprising a second body 21 and two second leads 22, the second body 21 having a second end 23 adjacent to the second leads 22; the first voice coil 10 is connected to the second voice coil 20, and the first end 13 is attached to the second end 23.

In this embodiment, the speaker generally includes a frame 30, a vibration system and a magnetic circuit system, wherein the frame 30 encloses to form a receiving cavity, the magnetic circuit system and the vibration system are disposed in the receiving cavity, the magnetic circuit system includes a magnetic yoke 70, a center magnet 71 and a side magnet 72 mounted on the magnetic yoke 70, and further includes a center magnetic conductive plate 80 disposed on the center magnet 71 and a side magnetic conductive plate disposed on the side magnet 72, wherein the side magnetic conductive plate is injection molded on the frame 30 in this embodiment; the center magnet 71, the center magnetic conductive plate 80, the side magnet 72 and the side magnetic conductive plate form a magnetic flux gap, the vibration system comprises a vibrating diaphragm 40 and a voice coil assembly, the voice coil assembly is arranged on the magnetic flux gap in a surrounding mode, and the vibrating diaphragm 40 is connected to one end of the voice coil assembly. The vibration system may further include a centering support 60 for supporting the diaphragm 40 and the voice coil assembly, and a reinforcing portion 50 may be provided at the other side of the diaphragm 40 to adjust the overall acoustic performance. During the operation of the loudspeaker, a magnetic field is generated in the magnetic flux gap, the voice coil assembly is electrified, the electrified voice coil assembly can vibrate under the action of ampere force in the magnetic field, and the vibrating voice coil assembly can drive the vibrating diaphragm 40 to vibrate together, so that the vibrating diaphragm 40 can drive air to sound. The voice coil assembly is typically formed by winding a conductive wire, and after the voice coil is wound, an annular body and a lead attached to the outer peripheral surface of the body are typically formed, the lead being typically adjacent an end of the body.

In this embodiment, the first end portion 13 refers to one end of the two end walls of the first body 11 adjacent to the two first leads 12 in the axial direction, and the first end portion 13 may be planar or concave-convex; the definition of the second end portion 23 corresponds to the first end portion 13, and it is only necessary that the first end portion 13 is connectable to the second end portion 23. The diaphragm 40 may be connected to one end of the first voice coil 10 or the second voice coil 20, which is not connected to the other end, for example, the first voice coil 10 further has a third end far from the two first leads 12, and the diaphragm 40 may be connected to the third end.

According to the loudspeaker provided by the invention, the first voice coil 10 and the second voice coil 20 which are arranged in a split manner are connected in series, so that in the working process of the voice coil assembly, the positions of the first voice coil 10 and the second voice coil 20 in a magnetic field are different, and therefore, the magnetic induction intensities penetrating through the first voice coil 10 and the second voice coil 20 are also different, and the induced electromotive forces generated by the first voice coil 10 and the second voice coil 20 are also different, and the relative positions of the first voice coil 10 and the second voice coil 20 in the magnetic field, namely the vibration positions of the whole voice coil assembly in the magnetic field, can be calculated in real time by detecting the voltage difference at the connecting positions of the first voice coil 10 and the second voice coil 20. If the voice coil assembly deviates from the preset position in the vibration process, the positions of the first voice coil 10 and the second voice coil 20 are changed, and the magnetic induction intensity passing through the first voice coil 10 and the second voice coil 20 is also changed at the moment, so that the induced electromotive force generated by the first voice coil 10 and the second voice coil 20 is also changed, namely, the voltage difference at the joint of the first voice coil 10 and the second voice coil 20 is changed, and the integral deviation of the voice coil assembly can be obtained by detecting the change of the voltage difference, so that the voice coil assembly returns to the preset position in a mode of externally inputting compensation current, the correction of the position of the voice coil assembly is realized, the vibration of the voice coil assembly in a magnetic field is more stable, the vibration of the vibrating diaphragm 40 is also more stable, and the integral acoustic performance of the loudspeaker is effectively improved. In addition, the first end 13 of the first voice coil 10, which is far from the first lead 12, is connected to the second end 23 of the second voice coil 20, which is far from the second lead 22, so that the reliability margin of the connection of the first voice coil 10 and the second voice coil 20 can be increased, thereby improving the connection strength of the first voice coil 10 and the second voice coil 20, and improving the stability of the voice coil assembly as a whole.

Further, the first voice coil 10 and the second voice coil 20 are bonded by glue. In this embodiment, the first end portion 13 and the second end portion 23 are bonded by glue, so that the first voice coil 10 and the second voice coil 20 are firmly connected in a simple and convenient manner. It will be appreciated that the glue should not affect the current flow between the first voice coil 10 and the second voice coil 20 to achieve electrical series connection of the first voice coil 10 and the second voice coil 20.

Further, the first voice coil 10 and the second voice coil 20 are formed by winding enamelled wires, the surfaces of the enamelled wires are coated with self-adhesive paint, and the first voice coil 10 and the second voice coil 20 are adhered together through the self-adhesive paint on the adjacent enamelled wires. In this embodiment, the enameled wire coated with the self-adhesive paint has a certain viscosity, and the connection part of the first voice coil 10 and the second voice coil 20 formed by winding and gathering the enameled wire can be connected with each other under the action of the viscosity of the enameled wire, so that the connection of the first voice coil 10 and the second voice coil 20 is realized.

Further, the first end 13 is formed with a fitting structure, and the second end 23 is formed with a fitting structure adapted to the fitting structure. In this embodiment, the fitting structure may be separately connected to the first end portion 13, or may be integrally formed with the first voice coil 10; the mating structure is formed in the same manner as the mating structure. Through the mutual scarf joint of the jogging structure and the matching structure, the contact area of the first end part 13 and the second end part 23 can be increased, meanwhile, the mutual limiting direction of the first end part 13 and the second end part 23 can be increased, the first end part 13 and the second end part 23 are mutually limited in a plurality of directions, the connection strength of the first voice coil 10 and the second voice coil 20 is improved, and therefore the stability of the voice coil assembly in the vibration process is improved.

Further, the first end portion 13 is formed with a first protrusion and a first recess disposed adjacent to each other in the radial direction, and the second end portion 23 is formed with a corresponding second protrusion and second recess. In this embodiment, the number of the first protrusions and the second recesses may be plural and arranged along the radial direction of the first end portion 13 at intervals, the number of the second protrusions and the second recesses may be plural and arranged along the radial direction of the second end portion 23 at intervals, the first protrusions and the second recesses are matched, and the second protrusions and the first recesses are matched to increase the contact area between the first end portion 13 and the second end portion 23, so as to enhance the connection strength between the first voice coil 10 and the second voice coil 20.

Further, as shown in fig. 2, the first body 11 and the second body 21 are rectangular ring structures, and the first body 11 and the second body 21 have two opposite first corners and two opposite second corners; two first leads 12 are led out from two first corner positions, respectively, and two second leads 22 are led out from two second corner positions, respectively. In this embodiment, the first body 11 is preferably rectangular with four arc corners, and the four arc corners include two opposite first corners, and the two first leads 12 are led out from the two first corner positions respectively, so that the influence of the two first leads 12 connected with other structures on the first voice coil 10 in the vibration process of the first voice coil 10 can be reduced, and the overall stress of the first voice coil 10 is uniformly reduced, so that the swing of the first voice coil 10 is reduced. The shape of the second body 21 corresponds to that of the first body 11, and two second leads 22 are led out from two second corner positions, respectively. The first lead 12 is led out from the two first corner positions of the first body 11, and the second lead 22 is led out from the two second corner positions of the second body 21, so that the influence of the first lead 12 and the second lead 22 on the voice coil assembly in the vibration process of the voice coil assembly can be effectively reduced, the vibration stability of the voice coil assembly is improved, and the overall acoustic performance of the loudspeaker is improved.

Further, both the first leads 12 and both the second leads 22 are clockwise or counterclockwise. In this embodiment, the two first leads 12 and the two second leads 22 have the same line direction, so that the first voice coil 10 and the second voice coil 20 can be conveniently and synchronously wound in the production process, the production efficiency is improved, and the wiring structure of the vibration system is more standard and reasonable.

Further, the speaker further includes a frame 30, the frame 30 has a receiving cavity, the voice coil assembly is received in the receiving cavity, and two first conductive portions for electrically connecting the two first leads 12 and two second conductive portions for electrically connecting the two second leads 22 are disposed on the frame 30. The two first conductive parts are used for realizing the energization of the first voice coil 10, the two second conductive parts are used for realizing the energization of the second voice coil 20, and the first voice coil 10 and the second voice coil 20 are electrically connected through an external circuit.

Further, as shown in fig. 2, the vibration system further includes a centering support 60 fixed to the diaphragm 40; the centering support 60 includes an inner fixing portion connected to a central portion of the diaphragm 40, an outer fixing portion connected to an edge portion of the diaphragm 40, and a cantilever connected between the inner fixing portion and the outer fixing portion; the inner fixing part is provided with an inner bonding pad, the outer fixing part is provided with an outer bonding pad, and the two first leads 12 and the two second leads 22 are electrically connected with the inner bonding pad.

In this embodiment, the centering support 60 is used to form an elastic support for the vibration system, so as to ensure that the voice coil is vertical and not skewed, and effectively prevent the polarization of the diaphragm 40; meanwhile, the centering support 60 is made of a flexible circuit board, and the lead of the voice coil assembly is directly and electrically connected with the inner bonding pad on the centering support 60 after being led out, so that the lead does not need to be suspended, and polarization can be further avoided; specifically, the inner fixing part and the outer fixing part are integrally connected through the cantilever, the inner bonding pad and the outer bonding pad are electrically connected through the copper foil of the conducting layer, the outer bonding pad is used for being electrically connected with an external circuit, and the inner bonding pad is electrically connected with the two first leads 12 and the two second leads 22, so that the voice coil assembly is electrically connected with the external circuit. The inner bonding pad is arranged on the inner side of the inner fixing part, so that occupation of the inner space of the loudspeaker can be reduced, and the whole structure of the loudspeaker is simpler and more compact.

Further, the inner fixing portion is provided with four inner bonding pads, the outer fixing portion is provided with four outer bonding pads electrically connected with the four inner bonding pads in a one-to-one correspondence manner, and the two first leads 12 and the two second leads 22 are respectively electrically connected with the four inner bonding pads. In this embodiment, the two first leads 12 and the two second leads 22 are electrically connected with four inner pads, and the four inner pads are electrically connected with four outer pads, so that the connection between each inner pad and the first lead 12 and the connection between each inner pad and the second lead 22 are more stable, and the overall stability of the speaker is improved.

Further, the number of winding layers of the first voice coil 10 in the radial direction is the same as that of the second voice coil 10. In the present embodiment, the number of winding layers of the first voice coil 10 and the second voice coil 20 along the radial direction is the same, so that the overall dimensions and the shape of the first voice coil 10 and the second voice coil 20 are the same, thereby reducing the influence of the dimensions on the potential difference between the first voice coil 10 and the second voice coil 20, reducing the interference factors in the process of detecting and calculating the first voice coil 10 and the second voice coil 20, and improving the accuracy of monitoring the positions of the first voice coil 10 and the second voice coil 20.

Further, the inner diameter and the outer diameter of the first voice coil 10 and the second voice coil 20 are the same; and/or the number of turns of the first voice coil 10 is the same as that of the second voice coil 20. In the present embodiment, the number of turns of the first voice coil 10 and the second voice coil 20 are the same, so that the overall dimensions and the shape of the first voice coil 10 and the second voice coil 20 are the same, the influence of the dimensions on the potential difference between the first voice coil 10 and the second voice coil 20 can be reduced, the interference factors in the process of detecting and calculating the first voice coil 10 and the second voice coil 20 are reduced, and the accuracy of monitoring the positions of the first voice coil 10 and the second voice coil 20 is improved.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A loudspeaker comprising a vibration system comprising a diaphragm and a voice coil assembly, wherein the voice coil assembly comprises:

the second voice coil comprises a second body and two second leads, and the second body is provided with a second end part far away from the second leads; the first voice coil is connected with the second voice coil, and the first end part is attached to the second end part;

the two first leads and the two second leads are clockwise or anticlockwise;

The first end part is provided with a first bulge and a first recess which are adjacently arranged along the radial direction, the second end part is provided with a corresponding second bulge and a second recess, the first bulge is matched with the second recess, and the second bulge is matched with the first recess so as to increase the contact area between the first end part and the second end part, thereby enhancing the connection strength of the first voice coil and the second voice coil;

the first end part is one end, far away from two first leads, of two end walls in the axial direction of the first body, and the second end part is one end, far away from two second leads, of two end walls in the axial direction of the second body, and the first end part can be connected with the second end part.

2. The loudspeaker of claim 1, wherein the first voice coil and the second voice coil are bonded by glue.

3. The loudspeaker of claim 1, wherein the first voice coil and the second voice coil are formed by winding an enameled wire, the surfaces of the enameled wires are coated with self-adhesive paint, and the first voice coil and the second voice coil are bonded together through the self-adhesive paint on the adjacent enameled wires.

4. The loudspeaker of claim 1, wherein the first voice coil has the same number of radially wound layers as the second voice coil.

5. The loudspeaker of claim 1, wherein the first voice coil and the second voice coil have the same inner and outer diameters; and/or the number of the groups of groups,

The number of turns of the first voice coil is the same as the number of turns of the second voice coil.

6. The loudspeaker of claim 1, further comprising a frame having a receiving cavity, wherein the voice coil assembly is received in the receiving cavity, wherein the frame has two first conductive portions for electrically connecting the two first leads and two second conductive portions for electrically connecting the two second leads.

7. The loudspeaker of claim 1, wherein the vibration system further comprises a centering pad secured with the diaphragm;

8. The loudspeaker of claim 7, wherein four inner bonding pads are provided on the inner fixing portion, four outer bonding pads electrically connected to the four inner bonding pads in a one-to-one correspondence are provided on the outer fixing portion, and two of the first leads and two of the second leads are electrically connected to the four inner bonding pads, respectively.

9. A loudspeaker according to any one of claims 1 to 8, wherein the first voice coil and the second voice coil are connected in series.