CN110798781A

CN110798781A - Miniature loudspeaker

Info

Publication number: CN110798781A
Application number: CN201910296442.8A
Authority: CN
Inventors: 徐庆山; 曾宪华
Original assignee: FOSHAN VECO ELECTRONIC Co Ltd
Current assignee: FOSHAN VECO ELECTRONIC Co Ltd
Priority date: 2019-04-13
Filing date: 2019-04-13
Publication date: 2020-02-14

Abstract

The invention discloses a loudspeaker, which relates to the technical field of loudspeaker equipment; the device comprises a bracket and a vibrating diaphragm arranged on the bracket, wherein a cavity for installing an FPC (flexible circuit board), a voice coil and a magnetic circuit structure is arranged in the bracket; the voice coil loudspeaker voice coil upside sets up on the vibrating diaphragm, still be provided with magnetic structure on the voice coil loudspeaker voice coil, the both ends below of voice coil loudspeaker voice coil all is provided with FPC, the FPC downside sets up on the support. According to the invention, the FPC (flexible circuit board) is arranged on the voice coil, and the FPC (flexible circuit board) can provide enough elasticity and damping to reduce the vibration of the lead of the voice coil, so that the rated power is improved, and the service life test under high-power operation is carried out.

Description

Miniature loudspeaker

Technical Field

The invention relates to the technical field of loudspeaker equipment, in particular to a micro loudspeaker.

Background

As electronic products are highly pursued for portability, volume reduction is a necessary goal when various products are updated, but the volume reduction means that the volume of the micro-speaker magnet is reduced at the same time, and the arrangement causes volume reduction; if the volume reduction caused by the magnet becoming smaller is compensated by increasing the power, the micro-speaker is exposed to the risk of breaking the voice coil lead due to the too large amplitude.

The micro-speaker containing the FPC in the prior art is only adhered to the upper side or the lower side of the voice coil from the inner side of one FPC, and the outer side of the FPC is connected to the frame body, but along with the reduction of the size space of the micro-speaker monomer, the space between the voice coil and the frame body cannot accommodate the minimum width of the FPC, so that the whole piece of FPC is difficult to integrate into the micro-speaker monomer.

Disclosure of Invention

The present invention is directed to a micro-speaker to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

a micro loudspeaker comprises a support and a vibrating diaphragm arranged on the support, wherein a cavity for mounting an FPC (flexible circuit board), a voice coil and a magnetic circuit structure is arranged in the support; the utility model discloses a voice coil loudspeaker voice coil, including voice coil loudspeaker voice coil, voice coil loudspeaker voice coil upside sets up on the vibrating diaphragm, still be provided with magnetic structure on the voice coil loudspeaker voice coil, the both ends below of voice coil loudspeaker voice coil all is provided with FPC, the FPC downside sets up voice coil loudspeaker voice coil lead wire both ends on the support and connects respectively on the voice coil loudspeaker voice coil downside and correspond the FPC that sets up at the voice coil loudspeaker.

As a further scheme of the invention: the vibrating diaphragm is flexibly connected to the support.

As a still further scheme of the invention: the diaphragm is provided in a slender shape.

As a still further scheme of the invention: the center of the voice coil is located on a central shaft of the diaphragm in the length direction.

As a still further scheme of the invention: the area of the FPC is less than 50% of the diaphragm.

As a still further scheme of the invention: the magnetic circuit structure comprises a washer, a magnet and a yoke.

As a still further scheme of the invention: the magnet is arranged on the yoke, the washer is arranged on the magnet, and the washer is embedded in the bracket.

As a still further scheme of the invention: the magnetic circuit structure comprises a yoke and two main magnets and two side magnets arranged on the yoke, wherein two side magnets are arranged on two sides of the main magnet, the washer is arranged above the main magnets and the side magnets, and the washer is embedded in the bracket.

Compared with the prior art, the invention has the beneficial effects that: by arranging the FPC (flexible circuit board) on the voice coil, the FPC (flexible circuit board) can provide enough elasticity and damping to reduce the vibration of the lead wire of the voice coil, so that the rated power is improved, and the service life under high-power operation is tested.

Drawings

Fig. 1 is a schematic structural diagram of a micro-speaker.

Fig. 2 is an exploded view of the micro-speaker in accordance with embodiment 1.

Fig. 3 is an exploded view of the micro-speaker in accordance with embodiment 2.

In the figure: 1-support, 2-FPC (flexible circuit board), 3-voice coil, 4-vibrating diaphragm, 5-washer, 6-magnet, 7-yoke, 8-main magnet and 9-side magnet.

Detailed Description

The drawings in the embodiments of the present invention will be set forth below to clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-2, in embodiment 1 of the present invention, a micro speaker includes a support 1 and a diaphragm 4 disposed on the support 1, and a cavity for mounting an FPC (flexible circuit board) 2, a voice coil 3 and a magnetic circuit structure is disposed in the support 1.

Preferably, in the embodiment of the present invention, the diaphragm 4 is flexibly connected to the support 1, and the diaphragm 4 is configured to be elongated, i.e., the dimension of the diaphragm 4 in the length direction is larger than the dimension of the diaphragm in the width direction.

The cavity has an opening adapted to the shape of the diaphragm 4, and the diaphragm 4 is connected to the support 1 by an annular suspension edge to seal the opening.

The upper side of the voice coil 3 is arranged on the diaphragm 4.

Preferably, in the embodiment of the present invention, the center of the voice coil 3 is located on a central axis in the length direction of the diaphragm 4, FPCs (flexible circuit boards) 2 are respectively disposed below two ends of a long axis of the voice coil 3, the lower side of the FPC (flexible circuit board) 2 is disposed on the support 1, the area of the FPC (flexible circuit board) 2 is smaller than 50% of that of the diaphragm 4, and two ends of a lead of the voice coil are respectively connected to the lower side of the voice coil 3 and the FPC (flexible circuit board) 2 correspondingly disposed on the lower side of the voice coil 3.

And the voice coil 3 is also provided with a magnetic circuit structure. The magnetic circuit structure is used for providing a magnetic field to make the voice coil 3 vibrate and drive the diaphragm 4 to vibrate and produce sound.

The FPC (flexible circuit board) 2 is provided with a connecting terminal for being connected with the outside, and the external sound source signals are conveniently input through the FPC (flexible circuit board) 2 by the arrangement, so that the vibrating diaphragm 4 can vibrate and sound.

Preferably, in the embodiment of the present invention, the magnetic circuit structure includes a washer 5, a magnet 6 and a yoke 7, the magnet 6 is disposed on the yoke 7, the washer 5 is disposed on the magnet 6, and the washer 5 is embedded in the bracket 1.

Example 2

Referring to fig. 3, the main difference between the present embodiment 2 and the present embodiment 1 is that the magnetic circuit structure includes a yoke 7, and a main magnet 8 and a side magnet 9 disposed on the yoke 7, and two side magnets 9 are disposed on two sides of the main magnet 8; the washer 5 is arranged above the main magnet 8 and the side magnet 9, and the washer 5 is embedded on the bracket 1.

According to the invention, two independent FPC (flexible circuit board) 2 are arranged as media, the amplitude originally born by the voice coil lead is changed into the amplitude born by the voice coil lead and the FPC (flexible circuit board) 2 together, the FPC (flexible circuit board) 2 can provide enough elasticity and damping to reduce the substantial vibration of the voice coil lead, so that the miniaturized micro loudspeaker can bear the amplitude brought by high power, the rated power is further improved (even if the volume is reduced, the high volume can still be provided), and the service life under high-power operation is tested; the two independent FPC (flexible circuit board) 2 can adjust the shape, the style and the thickness of the FPC (flexible circuit board) 2 according to the vibration mode of the vibrating diaphragm 4, so that the vibration behavior of the micro-speaker is optimized, and better sound quality is provided; two independent FPCs (flexible circuit boards) 2 can be connected to the frame in advance during the manufacturing process to be used as a semi-finished product, which simplifies the complexity of the assembly and manufacturing process of the micro-speaker.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, in the description of the present invention, "a plurality" means two or more unless otherwise specified. A feature defined as "first," "second," etc. may explicitly or implicitly include one or more of the feature.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A micro loudspeaker comprises a support (1) and a vibrating diaphragm (4) arranged on the support (1), wherein a cavity for mounting an FPC (2), a voice coil (3) and a magnetic circuit structure is arranged in the support (1); voice coil loudspeaker voice coil (3) upside sets up on vibrating diaphragm (4), voice coil loudspeaker voice coil (3) downside is provided with magnetic structure, its characterized in that, the both ends below of voice coil loudspeaker voice coil (3) all is provided with FPC (2), FPC (2) downside sets up on support (1), and voice coil loudspeaker voice coil lead wire both ends are connected respectively on voice coil loudspeaker voice coil (3) downside and correspond FPC (2) that set up at voice coil loudspeaker voice coil (3) downside.

2. A microspeaker as claimed in claim 1, wherein the diaphragm (4) is flexibly attached to the support (1).

3. A micro-speaker as claimed in claim 1, wherein the diaphragm (4) is provided in an elongated shape.

4. A microspeaker as claimed in claim 3, wherein the voice coil (3) is centered on the central axis of the diaphragm (4) in the lengthwise direction thereof.

5. A microspeaker as claimed in claim 4, wherein the FPC (2) has an area of less than 50% of the diaphragm (4).

6. The microspeaker of any one of claims 1-5 wherein the magnetic structure comprises a washer (5), a magnet (6) and a yoke (7).

7. The micro-speaker according to claim 6, wherein the magnet (6) is arranged on the yoke (7), the washer (5) is arranged on the magnet (6), and the washer (5) is embedded on the bracket (1).

8. The micro-speaker as claimed in any one of claims 1-5, wherein the magnetic structure comprises a yoke (7) and a main magnet (8) and a side magnet (9) arranged on the yoke (7), two side magnets (9) are arranged on two sides of the main magnet (8), the washer (5) is arranged above the main magnet (8) and the side magnets (9), and the washer (5) is embedded on the bracket (1).