CN113490118A

CN113490118A - Ultra-thin high-loudness screen sound production unit

Info

Publication number: CN113490118A
Application number: CN202110805074.2A
Authority: CN
Inventors: 张凯; 张林峰; 伊仁鑫
Original assignee: Zhejiang Qisheng Electronic Technology Co ltd
Current assignee: Zhejiang Qisheng Electronic Technology Co ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2021-10-08

Abstract

The invention discloses an ultrathin high-loudness screen sound generating unit, which comprises: the magnetic circuit module comprises a central magnetic group and a plurality of side magnetic groups; the magnetic cover module is connected with the central magnetic group and the side magnetic group; the voice coil module is arranged on the magnetic cover, the central magnetic group is arranged on the inner side of the voice coil module, and the side magnetic group is arranged on the outer side of the voice coil module; the voice coil module and the magnetic circuit module are arranged between the fixing piece module and the magnetic cover, the flexible circuit board FPC module is connected with the fixing piece module, and the elastic module is arranged at the corner of the magnetic cover module and connected with the fixing piece module. The invention can directly drive the screen to sound, cancel the sound outlet of the device, improve the dustproof and waterproof grade of the product, realize the great reduction of the thickness, release the internal space of electronic products such as mobile terminals and simultaneously keep high loudness.

Description

Ultra-thin high-loudness screen sound production unit

Technical Field

The invention relates to the technical field of loudspeakers, in particular to an ultrathin high-loudness screen sounding unit.

Background

The traditional loudspeaker needs to be matched with the BOX for use, but the BOX needs to occupy a large installation space and needs to be perforated for sound transmission, but when the current mobile terminal is designed into electronic products such as a mobile phone, the body tends to be thinner and thinner, and the design requirements of the future ultrathin consumer electronic products cannot be met by the existing common loudspeaker.

Patent document 1 discloses a thin speaker box including a cabinet accommodating at least one thin speaker; a low-frequency sound guide plate is arranged right above the sound radiation of the thin loudspeaker; still be provided with at least one high pitch loudspeaker unit in the box, be provided with the high pitch radiating groove on the box epitheca that is close to high pitch loudspeaker unit to improve the reliability of high pitch loudspeaker unit long term end load during operation. The thin loudspeaker is composed of a cone frame, U iron, a magnet, a magnetic pole core, a voice coil with a corrugated ring, a positioning support piece and a wiring board, and the height of the whole structure is reduced on the premise of not reducing the output sound pressure level of the loudspeaker through the special design of the corrugated ring and the positioning support piece, so that the thin loudspeaker is favorable for installation and use in the thin loudspeaker box.

However, the speaker of patent document 1 still cannot be separated from the conventional speaker structure, and it is difficult to achieve a good effect in terms of thinning characteristics, and the existing market demand is still not satisfied.

Patent document 1: CN 207443119U.

Disclosure of Invention

The invention provides an ultrathin high-loudness screen sound production unit to avoid the defects of the prior art, which directly drives a screen to produce sound, greatly reduces the thickness of a vibrator and meets the design requirements of ultrathin electronic products.

The technical scheme adopted by the invention for solving the technical problems is as follows: an ultra-thin high loudness screen sound generating unit comprising: the magnetic circuit module comprises a central magnetic group and a plurality of side magnetic groups, the side magnetic groups are arranged around the central magnetic group, and each central magnetic group and each side magnetic group comprise magnetic steel and pole pieces which are arranged in a stacked mode; the magnetic cover module is connected with the central magnetic group and the side magnetic group; the voice coil module is arranged on the magnetic cover, the central magnetic group is arranged on the inner side of the voice coil module, and the side magnetic group is arranged on the outer side of the voice coil module; the voice coil module and the magnetic circuit module are arranged between the fixing piece module and the magnetic cover, the flexible circuit board FPC module is connected with the fixing piece module, and the elastic module is arranged at the corner of the magnetic cover module and connected with the fixing piece module.

The screen sounding unit further comprises a limiting frame module, the flexible circuit board FPC module is arranged between the limiting frame module and the fixing piece module, and the magnetic circuit module, the voice coil module and the elastic module are arranged on the inner side of the limiting frame module.

In several embodiments, the limiting frame module comprises four limiting plates which are sequentially connected end to end, one of the limiting plates is provided with two grooves on one side, and the Flexible Printed Circuit (FPC) module is inserted into the grooves and arranged between the limiting frame module and the fixing piece module.

In several embodiments, four side magnetic groups are provided, four side magnetic groups are respectively provided on four sides of the voice coil module, and a single elastic module is provided between two adjacent side magnetic groups.

In several embodiments, the magnetic shield module includes a first mounting region, four second mounting regions disposed on four sides of the first mounting region and flush with the first mounting region, and four third mounting regions disposed between any two adjacent second mounting regions, the third mounting regions having a thickness less than the second mounting regions.

In some embodiments, the first mounting region is configured to mount the voice coil module and the center magnet assembly, and the second mounting region is configured to mount the side magnet assembly.

In several embodiments, four elastic modules are provided, each elastic module is a U-shaped elastic sheet, one end of each elastic module is connected with the corresponding fixing sheet module, and the other end of each elastic module is matched with the corresponding third installation area.

In several embodiments, the screen sound generating unit is disposed in a mobile terminal, the mobile terminal includes a screen and a terminal housing, and the screen sound generating unit is connected to the screen.

The invention has the following beneficial effects:

the screen sounding unit can directly drive the screen to sound, cancel the sound outlet of the equipment, improve the dustproof and waterproof grade of the product, and does not need the BOX and the space of the corresponding rear cavity, thereby realizing the great reduction of the thickness and releasing the space inside the electronic product such as a mobile terminal; the screen sounding unit achieves the thinning effect and has the characteristic of high loudness; and the screen sounding unit can be freely placed and installed in a limited space in the mobile terminal and is adaptive to different mobile terminals.

Drawings

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not to be considered limiting of the scope of the present disclosure.

Fig. 1 schematically shows a three-dimensional structure of a side direction of a screen sound emitting unit in an embodiment;

fig. 2 schematically shows a three-dimensional structure of the other side direction of the screen sound emitting unit in an embodiment;

fig. 3 schematically shows a three-dimensional structure of the other side direction of the screen sound emitting unit in an embodiment, in which the fixing sheet module is not included;

fig. 4 schematically illustrates an exploded view of a screen sound unit in one embodiment.

FIG. 5 schematically illustrates the overall structure of a magnetic shield in one embodiment;

fig. 6 schematically shows the structure of a mobile terminal in an embodiment;

fig. 7 schematically shows a cross-sectional structure of a mobile terminal in combination with a screen sound unit in an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.

Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of the present invention.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting and/or limiting of the invention.

For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "relative", "front-back-left-right" and the like indicate relative or absolute arrangements, and indicate not only such arrangements in a strict sense but also a state of being relatively displaced with a tolerance or an angle or a distance to the extent that the same function can be obtained.

The screen sounding unit mainly comprises a magnetic circuit module, a magnetic cover module 300, a voice coil module 400, a fixing piece module 500, a Flexible Printed Circuit (FPC) module 600, an elastic module 700 and a limiting frame module 800, and can be installed and arranged in a mobile terminal 10 (such as a mobile phone, a flat panel and the like) when in use, wherein the mobile terminal 10 comprises a screen 101 and a terminal shell 102, and the screen sounding unit is connected with the screen 101.

In this embodiment, regard as the sound source with the screen, whole sound generating unit fixed mounting is on the screen, passes through the FPC module by excitation signal and conducts to the voice coil loudspeaker voice coil module, and the voice coil loudspeaker voice coil module produces magnetic field, through the electromagnetic induction principle, produces the effort with the magnetic circuit module, provides the restoring force of magnetic circuit module by the elasticity module, controls whole device from this and takes place the vibration, promotes the screen sound production then.

The magnetic circuit module described above includes a central magnetic assembly 100 and a plurality of side magnetic assemblies 200, the side magnetic assemblies 200 are disposed around the central magnetic assembly 100, each of the central magnetic assembly 100 and each of the side magnetic assemblies 200 includes magnetic steel 1000 and pole pieces 2000 stacked on each other, and magnetic circuit matching is achieved by the magnetic steel and the pole pieces.

Specifically, four side magnet groups 200 are provided, the four side magnet groups 200 are respectively provided on four sides of the voice coil module 400, and a single elastic module 700 is provided between two adjacent side magnet groups 200.

By the voice coil module 400 of above-mentioned record, voice coil module 400 sets up on the magnetism cover, center magnetism group 100 sets up in voice coil module 400 inboard, limit magnetism group 200 sets up in the voice coil module 400 outside, and the voice coil module is the structure of rectangle frame, and rectangle or square all can, and limit magnetism group then just sets up four side positions at the voice coil module, and its length and side length unanimously can, the width of the inside central line magnetism group of voice coil loudspeaker voice coil needs to be greater than the width of limit magnetism group, combines the magnetism cover, can be under thinner thickness condition, provides high B value, has the characteristic of ultra-thin high loudness.

With the magnetic shield module 300 described above, the central magnetic set 100 and the side magnetic sets 200 are both connected to the magnetic shield module 300, the magnetic shield module 300 includes a first mounting region 301, four second mounting regions 302 and four third mounting regions 303, the second mounting regions 302 are disposed on four sides of the first mounting region 301 and are flush with the first mounting region 301, a single third mounting region 303 is disposed between any two adjacent second mounting regions 302, and the thickness of the third mounting region 303 is smaller than that of the second mounting region 302. The first mounting area and the second mounting area form a state similar to an uncovered square box body in an unfolded state, the length and the width of the first mounting area correspond to the length and the width of the corresponding center magnetic group and side magnetic group, therefore, the first mounting area 301 is used for mounting the voice coil module 400 and the center magnetic group 100, the second mounting area 302 is used for mounting the side magnetic group 200, the integral compactness is improved, and the waste of space is avoided.

By the stationary blade module 500 of above-mentioned record, voice coil loudspeaker voice coil module 400 and magnetic circuit module all set up between stationary blade module 500 and magnetic shield, and the stationary blade module adopts the good panel of heat conductivity to make, all can like copper, and voice coil loudspeaker voice coil module and stationary blade module rigid coupling can come from the heat that the voice coil loudspeaker voice coil module produced by the quick outside conduction release of stationary blade module, have improved the radiating effect.

According to the above-mentioned FPC module 600, the FPC module 600 is connected to the fixing piece module 500, and the FPC module 600 has two connecting corners, and is also connected to the fixing piece module, and the other end of the FPC module is located outside the limiting frame and electrically connected to the electronic device in the terminal.

The four elastic modules 700 are arranged at the corner of the magnetic shield module 300 and connected with the fixing sheet module 500, the elastic module 700 is a U-shaped elastic sheet, one end of the elastic module 700 is connected with the fixing sheet module 500, and the other end of the elastic module 700 is matched with the third installation area 303.

The U-shaped elastic sheets are symmetrically arranged, if the fixing sheet module is set to be of a rectangular structure, the U-shaped elastic sheets are located on two long side sides and are oppositely arranged when an opening is formed between the two U-shaped elastic sheets on the same long side.

Through the attenuate structure of third installation area, when the one end at U type shell fragment is installed in this region, the thickness stack of both just equals the thickness of first installation area or second installation area, realize the parallel and level effect, the rational utilization space, during the use, U type shell fragment one end is located the lower terminal surface (third installation area position) of magnetic shield module, the other end then is connected with the lower terminal surface of stationary blade module, from this when voice coil module cooperation magnetic circuit module takes place the motion, drive the motion of stationary blade module, realize pulling back by U type shell fragment, then realize vibrating the sound production.

Firstly, the connecting part of the U-shaped elastic sheet and the magnetic cover is thinned, so that the whole thickness of the U-shaped elastic sheet is further thinned, the U-shaped elastic sheet can be laterally placed, and the height of a Z axis can be further reduced compared with other elastic parts such as a conventional spring and the like; and, four U type shell fragments realize the effect of four corners location, avoid the skew of four limit magnetic assemblies in vibrations process, stability when having guaranteed vibrations.

In the above-mentioned limit frame module 800, the flexible printed circuit FPC module 600 is disposed between the limit frame module 800 and the fixing piece module 500, and the magnetic circuit module, the voice coil module 400, and the elastic module 700 are disposed inside the limit frame module 800.

Spacing frame module 800 includes four limiting plate 810 that end to end in proper order, one of them limiting plate 810 one side is provided with two recesses 811, flexible printed circuit FPC module 600 inserts through recesses 811 and sets up between spacing frame module 800 and stationary blade module 500, and spacing frame module is mouthful style of calligraphy structure, can be by four limiting plate connection shaping, also can be by the panel concatenation shaping of two L forms, mainly plays spacing and the effect of acceping, can provide male space to flexible printed circuit FPC module 600 by the recess 811 of one side.

The use of the terms "a" and "an" and "the" and similar referents in the context of describing the invention are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All manner of description herein may be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.

The present invention describes preferred embodiments, including the best mode known to the inventors for carrying out the invention. Of course, variations of these preferred embodiments will be apparent to those skilled in the art. The inventors envision that the variations may be used as appropriate by those skilled in the art and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications encompassed within the spirit and scope of the invention as defined by the claims. Moreover, any and all possible variations of the above-described elements are encompassed by the present invention unless otherwise indicated herein or otherwise clearly contradicted by context.

Description of the marks

Mobile terminal 10

A screen 101

Terminal housing 102

Central magnetic group 100

Side magnet group 200

Magnetic steel 1000

Pole piece 2000

Magnetic shield module 300

First mounting area 301

Second mounting area 302

Third mounting area 303

Voice coil module 400

Stator module 500

Flexible Printed Circuit (FPC) module 600

Elastic module 700

Limit frame module 800

Limiting plate 810

And a recess 811.

Claims

1. An ultra-thin high loudness screen sound generating unit, comprising:

the magnetic circuit module comprises a central magnetic group and a plurality of side magnetic groups, the side magnetic groups are arranged around the central magnetic group, and each central magnetic group and each side magnetic group comprise magnetic steel and pole pieces which are arranged in a stacked mode;

the magnetic cover module is connected with the central magnetic group and the side magnetic group;

the voice coil module is arranged on the magnetic cover, the central magnetic group is arranged on the inner side of the voice coil module, and the side magnetic group is arranged on the outer side of the voice coil module;

the voice coil module and the magnetic circuit module are arranged between the fixing sheet module and the magnetic cover;

the flexible circuit board FPC module is connected with the fixing piece module;

and the elastic modules are arranged at the corner parts of the magnetic shield modules and are connected with the fixing sheet modules.

2. The ultra-thin high-loudness screen sound production unit according to claim 1, further comprising a limit frame module, wherein the flexible circuit board FPC module is arranged between the limit frame module and the fixing sheet module, and the magnetic circuit module, the voice coil module and the elastic module are all arranged inside the limit frame module.

3. The ultra-thin high-loudness screen sound production unit according to claim 2, characterized in that the limiting frame module comprises four sequentially end-to-end limiting plates, one of which is provided with two grooves on one side, and the Flexible Printed Circuit (FPC) module is inserted and arranged between the limiting frame module and the fixing sheet module through the grooves.

4. The ultra-thin high-loudness screen sound generating unit according to claim 3, characterized in that four side magnetic groups are provided, four side magnetic groups are respectively provided on four sides of the voice coil module, and a single elastic module is provided between two adjacent side magnetic groups.

5. The ultra-thin high-loudness screen sound generating unit of claim 4, wherein the magnetic shield module comprises a first mounting area, four second mounting areas and four third mounting areas, the second mounting areas being disposed on four sides of the first mounting area and flush with the first mounting area, a single third mounting area being disposed between any two adjacent second mounting areas, the third mounting area having a thickness less than the thickness of the second mounting areas.

6. The ultra-thin high loudness screen sound generating unit of claim 5, where the first mounting area is used to mount the voice coil module and the center magnet assembly, and the second mounting area is used to mount the edge magnet assembly.

7. The ultra-thin high-loudness screen sound production unit according to claim 5, characterized in that there are four elastic modules, the elastic modules are U-shaped elastic pieces, one end of each elastic module is connected with a fixing piece module, and the other end of each elastic module is matched with a third installation area.

8. The ultra-thin high-loudness screen sound generating unit according to any one of claims 2-7, wherein the screen sound generating unit is arranged in a mobile terminal, the mobile terminal comprises a screen and a terminal shell, and the screen sound generating unit is connected with the screen.