WO2020006938A1

WO2020006938A1 - Electrical connection structure in sound producing device and vibration system and loudspeaker

Info

Publication number: WO2020006938A1
Application number: PCT/CN2018/112257
Authority: WO
Inventors: 王建建; 刘迎新
Original assignee: 歌尔股份有限公司
Priority date: 2018-07-04
Filing date: 2018-10-27
Publication date: 2020-01-09
Also published as: CN208369847U

Abstract

The present utility model relates to the technical field of loudspeakers. Disclosed are an electrical connection structure in a sound producing device and a vibration system and a loudspeaker. The electrical connection structure in the sound producing device comprises an upper surface portion for binding and fixing the surface of one side of a vibrating diaphragm in the sound producing device and a lower surface portion for binding and fixing a voice coil, and further comprises a conductive member for conducting a voice coil leading wire. An avoidance portion is provided on the lower surface portion, which is binded and fixed to the voice coil, of the electrical connection structure, and the voice coil leading wire passes through the avoidance portion and is electrically connected and fixed to the conductive member of the electrical connection structure. According to the present utility model, the electrical connection structure in the vibration system and the loudspeaker can effectively avoid the voice coil leading wire, the problem of voice coil deflection is solved, and the acoustic performance of the loudspeaker is improved.

Description

Electrical connection structure in sound generating device, vibration system and speaker

Technical field

The utility model relates to the technical field of speakers. More specifically, it relates to an electrical connection structure and a vibration system and a speaker in a sound generating device.

Background technique

With the expansion of the consumer electronics market, a large number of consumer electronics products such as mobile phones and notebook computers have been widely used. As an important acoustic component in consumer electronics, speakers have a wide range of needs. As people's requirements for consumer electronics products increase, the performance of speakers is receiving more and more attention.

In the prior art, the speaker includes an auxiliary system, a magnetic circuit system, and a vibration system. The magnetic circuit system is provided with a magnetic gap. The vibration system includes a diaphragm, an electrical connection structure combined with the diaphragm, and a voice coil. The electrical connection structure in the speaker is usually a flexible circuit board. The voice coil is disposed in the magnetic gap. After receiving the external electric signal, the voice coil disposed in the magnetic gap performs reciprocating motion under the driving of the magnetic field force, thereby driving the reinforcement part and the air above the diaphragm to generate sound.

The flexible circuit board is one of the basic components of the speaker. Its role is mainly to ensure the correct position of the voice coil in the magnetic gap. When the voice coil is stressed, the vibration system only reciprocates in the axial direction and provides the vibration system for reciprocating motion. Elasticity. The conventional flexible circuit board includes a first fixing portion and a second fixing portion. The first fixing portion is fixedly connected to the auxiliary system, the second fixing portion is connected to the voice coil, and the voice coil is electrically connected to the external circuit through the conductive layer of the flexible circuit board. , The first fixing portion and the second fixing portion are integrally connected by a connecting arm. The voice coil lead is wound from one side of the voice coil through the top of the voice coil to the other side of the voice coil, and is electrically connected to the pad of the flexible circuit board. Therefore, when the top of the voice coil is bonded and fixed to the flexible circuit board, the voice coil lead is sandwiched between the voice coil and the flexible circuit board, which will cause the voice coil to be deflected, the inner magnetic gap will decrease, and the outer magnetic gap will increase. , And easily cause friction between the voice coil and the magnetically permeable plate, affecting the acoustic performance of the speaker.

Therefore, there is a need to provide an improvement to overcome the structural defects of conventional speakers.

Utility model content

It is an object of the present invention to provide an electrical connection structure in a sound generating device. The electrical connection structure is formed with an avoidance portion that avoids the height of the voice coil lead, and the voice coil lead can be electrically connected and fixed through the conductive member.

The second object of the present invention is to provide a vibration system which can effectively avoid the voice coil lead and solve the problem of voice coil deflection caused by design factors.

A third object of the present invention is to provide a speaker, which can solve the problems of voice coil deflection and poor listening caused by a voice coil lead, and improve the acoustic performance of the speaker.

In order to achieve the above-mentioned first object, the present invention provides an electrical connection structure in a sound emitting device. The electrical connection structure includes an upper surface portion for fixing and fixing to a side surface of a diaphragm in the sound emitting device, and The lower surface portion of the voice coil is fixedly fixed, and further includes a conductive member for conducting conduction with the voice coil lead. An avoiding portion is provided on the lower surface portion of the electrical connection structure fixedly combined with the voice coil, and the voice coil lead passes through. The avoidance portion is electrically connected and fixed with the conductive member of the electrical connection structure.

Preferably, the avoiding portion is formed by the lower surface of the electrical connection structure corresponding to the position of the voice coil lead being recessed upward. Wherein, the width of the horizontal section of the avoiding portion is not smaller than the diameter of the voice coil lead.

Preferably, the voice coil lead and the electrical connection structure are glued and fixed.

Preferably, the avoidance portion is formed by penetrating the upper and lower surfaces of the electrical connection structure corresponding to the position of the voice coil lead.

Preferably, the electrical connection structure is a flexible circuit board, and the conductive member is a pad.

Preferably, the flexible circuit board includes an outermost first fixing portion, a second fixing portion located at a middle position, and a connecting arm connecting the first fixing portion and the second fixing portion.

Preferably, the pad is formed to extend inward from the second fixing portion in a horizontal direction, and the avoidance portion is provided corresponding to the pad.

Preferably, the flexible circuit board includes two oppositely disposed first sides and two oppositely disposed second sides, and the pads and the escape portion are symmetrically disposed on the first side or the second side On the side.

In order to achieve the second object, the present invention also provides a vibration system. The vibration system includes a reinforced portion, a diaphragm, an electrical connection structure, and a voice coil. The electrical connection structure is as described above. Electrical connection structure.

In order to achieve the third object, the present invention further provides a speaker, which includes an auxiliary system, a magnetic circuit system, and a vibration system. The magnetic circuit system and the vibration system are housed and fixed in a receiving cavity formed by the auxiliary system. The vibration system is a vibration system as described above.

The beneficial effects of this utility model are as follows:

The utility model provides an electrical connection structure in a sound generating device capable of avoiding a voice coil lead. An escape portion is formed on the electrical connection structure, and the voice coil lead can be passed through and electrically connected to a conductive member and fixed. Due to the problem of the voice coil bonding and deflection caused by the voice coil lead being sandwiched between the voice coil and the electrical connection structure, collision friction between the voice coil and the magnetically permeable plate is avoided. The utility model also provides a vibration system and a loudspeaker including the electrical connection structure. The vibration system and the loudspeaker are provided with an avoiding portion for avoiding a voice coil lead on the electric connection structure, which can prevent the adhesion of the voice coil from deflection. Improve the internal and external magnetic gap, effectively improve the sound performance of the speaker.

BRIEF DESCRIPTION OF THE DRAWINGS

The specific embodiments of the present invention will be further described in detail with reference to the accompanying drawings.

FIG. 1 shows an exploded view of a speaker in the present invention.

FIG. 2 shows a partially enlarged schematic diagram at B in FIG. 1.

FIG. 3 is a schematic structural diagram of a flexible circuit board in a preferred embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a flexible circuit board in another preferred embodiment of the present invention.

DESCRIPTION OF SYMBOLS: 11, reinforcing part; 12, diaphragm; 13, flexible circuit board; 131, pad; 132, second fixing part; 133, avoidance part; 134, connecting arm; 135, first fixing part ; 14, voice coil; 141, voice coil lead; 2, magnetic circuit system; 3, auxiliary system.

detailed description

In order to explain the utility model more clearly, the utility model will be further described below with reference to the preferred embodiments and the accompanying drawings. Similar parts in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that what is specifically described below is illustrative and not restrictive, and should not be used to limit the scope of protection of the present invention.

In the prior art, when the top of the voice coil is bonded and fixed to the flexible circuit board, the voice coil lead is sandwiched between the voice coil and the flexible circuit board, which will cause the voice coil to be deflected, the internal magnetic gap will be reduced, and the external magnetic The gap is increased, and it is easy to cause friction between the voice coil and the magnetically permeable plate, which affects the acoustic performance of the speaker. Based on the above problems, the present invention provides an electrical connection structure in a sound emitting device, and a vibration system and a speaker having the electrical connection structure. Specifically, the detailed description is described below with reference to the accompanying drawings.

FIG. 1 shows an exploded view of the loudspeaker in the present invention; FIG. 2 shows a partially enlarged schematic view at B in FIG. 1. FIG. 3 is a schematic structural diagram of a flexible circuit board in a preferred embodiment of the present invention. FIG. 4 is a schematic structural diagram of a flexible circuit board in another preferred embodiment of the present invention.

The utility model provides an electrical connection structure in a sound producing device. The electrical connection structure includes an upper surface portion used for fixing and fixing to a surface of a side of a diaphragm in the sound emitting device, and a lower surface portion used for fixing and fixing with a voice coil. And further includes a conductive member for conducting conduction with the voice coil lead, and an avoiding portion is provided on a lower surface portion of the electrical connection structure that is fixed in combination with the voice coil, and the voice coil lead passes through the avoiding portion and is electrically conductive. The pieces are electrically connected.

An escape portion is formed on the electrical connection structure provided by the utility model, and the voice coil lead can be passed through and electrically connected and fixed with the conductive member, which solves the problem caused by the voice coil lead sandwiched between the voice coil and the electrical connection structure in the prior art. The problem of deflection of the voice coil bonding can avoid collision friction between the voice coil and the magnetically permeable plate.

More specifically, the avoidance portion is formed by the lower surface of the electrical connection structure corresponding to the position of the voice coil lead being recessed upward. The way of forming the avoidance part is simple, the manufacturing process of the electrical connection structure having the avoidance part is simple, and it is easy to be processed and formed at one time.

In order to achieve effective avoidance of the voice coil lead, those skilled in the art can understand that the width of the horizontal section of the avoidance portion needs to be not less than the diameter of the voice coil lead.

During the design process, the voice coil lead and the electrical connection structure are fixed together by glue to prevent the speaker performance from being unstable due to the floating of the voice coil lead.

The electrical connection structure provided by this preferred embodiment is a flexible circuit board 13, and the conductive member is a pad 131 on the flexible circuit board 13. As shown in FIG. 3, an avoiding portion 133 is provided on a lower surface portion of the flexible circuit board 13 that is fixedly combined with the voice coil 14, and the voice coil lead 141 passes through the avoiding portion 133 and the pad 131 electrically. The connection is fixed. The avoiding portion 133 is formed by the lower surface of the flexible circuit board 13 corresponding to the position of the voice coil lead 141 being recessed upward. A width of a horizontal cross section of the avoiding portion 133 is larger than a diameter of a voice coil lead, and the voice coil lead 141 and the flexible circuit board 13 are fixed with glue.

As a modification of this embodiment, in another preferred embodiment, as shown in FIG. 4, the electrical connection structure is a flexible circuit board 13, and the conductive member is a pad 131 on the flexible circuit board 13. The avoidance portion is formed by penetrating the upper and lower surfaces of the flexible circuit board 13 corresponding to the position of the voice coil lead 141 to provide more sufficient space for the voice coil lead 141 to prevent the voice coil lead 141 from being caught between the voice coil 14 and the flexible circuit board 13 causes the voice coil 14 to be deflected. Specifically, in the preferred embodiment, the flexible circuit board 13 includes an outermost first fixing portion 135, a second fixing portion 132 at a middle position, and a connection between the first fixing portion 135 and the first fixing portion 135. The connecting arm 134 of the two fixing portions 132. The top surface of the voice coil 14 is fixed to the lower surface of the second fixing portion 132 of the flexible circuit board 13, and the voice coil lead 141 passes through the avoiding portion 133 and is electrically connected and fixed to the lower surface of the pad 131.

More specifically, the pad 131 extends inwardly from the second fixing portion 132 in a horizontal direction, and the avoidance portion 133 is provided corresponding to the pad 131. In order to avoid polarization, the flexible circuit board 13 includes two oppositely disposed first sides and two oppositely disposed second sides, and the pads 131 and the avoiding portions 133 are symmetrically disposed on the first side or The second side is symmetrical about the center of the flexible circuit board 13. Further, the avoiding portion 133 is preferably located at an intermediate position of the second fixing portion 132.

On the other hand, the present invention also provides a vibration system, which includes a reinforcing portion 11, a diaphragm 12, a flexible circuit board 13 and a voice coil 14 provided in the foregoing preferred embodiments.

In addition, the present invention also provides a speaker, as shown in FIGS. 1-2. The speaker includes an auxiliary system 3, a magnetic circuit system 2, and a vibration system provided by the present invention. The magnetic circuit system 2 and the vibration system contain the same. It is fixed in the receiving cavity formed by the auxiliary system 3. The magnetic circuit system includes a center magnet and a side magnet, and a magnetic yoke that fixes the center magnet and the side magnet and performs magnetic permeability. A side of the center magnet near the vibration system is provided with a center magnetic plate, and a side magnet is provided near the vibration system. There is a magnetically permeable plate, a magnetic gap is formed between the central magnet, the central magnetically permeable plate and the magnetic rim, the magnetically permeable plate, and one end of the voice coil 14 is suspended in the magnetic gap.

The vibration system and loudspeaker including the electrical connection structure provided by the present utility model. The vibration system and the loudspeaker are provided with an avoiding portion for avoiding the voice coil lead on the electrical connection structure, which can prevent the deflection of the voice coil and improve Internal and external magnetic gap, effectively improve the sound performance of the speaker.

Obviously, the foregoing embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, based on the above description, Other different forms of changes or modifications can also be made, and all implementations cannot be exhausted here. Any obvious changes or changes that belong to the technical solution of the utility model are still within the protection scope of the utility model. .

Claims

An electrical connection structure in a sound producing device. The electrical connection structure includes an upper surface portion for fixing and fixing to a side surface of a diaphragm in the sound emitting device, and a lower surface portion for fixing and fixing with a voice coil. A conductive member that is in electrical conduction with a voice coil lead is characterized in that an avoiding portion is provided on a lower surface portion of the electrical connection structure that is fixedly combined with the voice coil, and the voice coil lead passes through the avoiding portion and conducts electricity. The pieces are electrically connected.
The electrical connection structure according to claim 1, wherein the avoidance portion is formed by a depression of a lower surface of the electrical connection structure corresponding to the position of the voice coil lead, wherein

The width of the horizontal section of the avoiding portion is not smaller than the diameter of the voice coil lead.
The electrical connection structure according to claim 2, wherein the voice coil lead and the electrical connection structure are glued and fixed.
The electrical connection structure according to claim 1, wherein the avoidance portion is formed by penetrating the upper and lower surfaces of the electrical connection structure corresponding to the position of the voice coil lead.
The electrical connection structure according to claim 1, wherein the electrical connection structure is a flexible circuit board, and the conductive member is a pad.
The electrical connection structure according to claim 5, wherein the flexible circuit board includes a first outermost fixing portion, a second fixing portion located at a middle position, and a connection between the first fixing portion and the first fixing portion. Connecting arm of two fixing parts.
The electrical connection structure according to claim 5, wherein the pad extends inwardly from the second fixing portion in a horizontal direction, and the avoidance portion is provided corresponding to the pad.
The electrical connection structure according to claim 5, wherein the flexible circuit board comprises two oppositely disposed first sides and two oppositely disposed second sides, and the pads and the avoiding portions are symmetrically disposed at the opposite sides. Said on the first side or on the second side.
A vibration system, characterized in that the vibration system comprises a reinforcing part, a diaphragm, an electrical connection structure and a voice coil combined together, and the electrical connection structure is the electrical device according to any one of claims 3-8. Connection structure.
A loudspeaker, comprising an auxiliary system, a magnetic circuit system, and a vibration system. The magnetic circuit system and the vibration system are housed and fixed in a receiving cavity formed by the auxiliary system. The vibration system is claimed in claim 9 The vibration system.