CN108769880B

CN108769880B - Screen sounding structure for terminal

Info

Publication number: CN108769880B
Application number: CN201810315224.XA
Authority: CN
Inventors: 丁火根
Original assignee: Nubia Technology Co Ltd
Current assignee: Nubia Technology Co Ltd
Priority date: 2018-04-10
Filing date: 2018-04-10
Publication date: 2020-07-24
Anticipated expiration: 2038-04-10
Also published as: CN108769880A

Abstract

The invention relates to a screen sounding structure for a terminal, which comprises a screen and a rear shell, wherein the screen is hermetically connected with the rear shell to form a sealed front cavity, a rear cavity used for balancing partial pressure of gas in the front cavity is arranged in the front cavity, a magnetic piston which can reciprocate and is used for compressing the gas in the front cavity to further deform the screen to generate sound pressure and generate sound is arranged in the rear cavity, and a conductive coil which drives the magnetic piston to move through electromagnetic induction is wound outside the magnetic piston. The front cavity in the screen sounding structure for the terminal is large in cavity, good in low frequency, large in screen area, large in volume for pushing outside air, large in generated sound pressure, good in three-proofing performance and free from influence of appearance environment, and the screen and the rear shell are sealed to form the front cavity.

Description

Screen sounding structure for terminal

Technical Field

The invention relates to the technical field of loudspeaking equipment, in particular to a screen sounding structure for a terminal.

Background

Along with the portability of mobile terminal, internet access mouth product, ultra-thin ultralight's requirement is also higher and higher, and current screen sound production mainly has piezoceramics technique, motor exciter technique, and it has a great deal of shortcoming: the sound pressure is small, and the earphone can only be used as a receiver; the low frequency difference and the sharp sound are not beneficial to long-time listening of human ears; the three-proofing performance is poor and the failure is easy to occur.

Disclosure of Invention

The invention aims to provide a screen sounding structure for a terminal, which solves the problems of small sound pressure, low frequency difference and poor three-proofing performance of a terminal screen sounding technology in the prior art.

The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a screen sound production structure for terminal, includes screen and backshell, the screen with backshell sealing connection and formation sealed ante chamber be provided with in the ante chamber and be used for balancing the partial pressure's of preceding intracavity gaseous back chamber but install reciprocating motion in the back chamber and be used for compressing gaseous and then make in the ante chamber the screen warp and produce the acoustic pressure and send the magnetic magnetism piston of having of sound the magnetism piston is equipped with around being equipped with through electromagnetic induction drive the electrically conductive coil that the magnetism piston removed.

Optionally, the back chamber includes first cavity, with communicating second cavity of ante-chamber and be used for the intercommunication the passageway of first cavity and second cavity, the magnetism piston includes the piston main part and this piston main part is located in the passageway, the one end of piston main part is provided with and is used for the compression the gaseous piston clamp plate in the ante-chamber and this piston clamp plate is located in the second cavity, the other end of piston main part is provided with and is used for preventing the piston baffle that the magnetism piston drops and this piston baffle is located in the first cavity.

Optionally, end walls of each end of the piston pressing plate are matched with an inner cavity wall of the second cavity, and a lubricant is arranged between the end walls of each end of the piston pressing plate and the inner cavity wall of the second cavity.

Optionally, the lubricant is a lubricating oil or talc.

Optionally, the conductive coil is wound on the outer peripheral wall corresponding to the channel of the rear cavity.

Optionally, the magnetic piston is made of a magnet.

Optionally, the conductive coil is made of copper, gold, or silver.

Optionally, the number of turns of the conductive coil is more than or equal to 3.

Optionally, the screen is an O L ED screen or a L ED screen, and the rear shell is made of hard metal.

Optionally, the screen and the rear shell are hermetically connected through a dispensing manner.

The screen sounding structure for the terminal has the following beneficial effects: the front cavity in the screen sounding structure for the terminal is large in cavity, good in low frequency, large in screen area, large in volume for pushing outside air, large in generated sound pressure, good in three-proofing performance and free from influence of appearance environment, and the screen and the rear shell are sealed to form the front cavity.

Drawings

Fig. 1 is an external view schematically illustrating a screen sound emission structure for a terminal according to the present invention;

fig. 2 is a schematic partial sectional view of the screen sound emission structure of fig. 1 in the direction of a-a according to the present invention.

Detailed Description

The screen sounding structure and the specific implementation of the terminal of the present invention are further described below with reference to the accompanying drawings and embodiments:

it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-2, the present invention relates to a screen sound-generating structure for a terminal, which includes a screen 1 and a rear case 2, the screen 1 and the rear case 2 are connected in a sealing manner to form a sealed front cavity 6, the screen 1 and the rear case 2 can be connected in a sealing manner by dispensing, or can be sealed by adding a sealing ring, etc., the screen 1 can be an O L ED screen, or a L ED screen, etc., which can be slightly deformed, the rear case 2 can be made of hard metal, such as aluminum alloy, stainless steel, etc., which cannot be deformed, in other embodiments, the rear case 2 can also be made of other hard materials, such as hard ceramic, etc., which cannot be deformed.

The screen comprises a front cavity 6, a rear cavity 5 used for balancing partial pressure of gas in the front cavity is arranged in the front cavity 6, a magnetic piston 3 which can move back and forth and is used for compressing the gas in the front cavity 6 to further deform the screen 1 to generate sound pressure and send sound is arranged in the rear cavity 5, and a conductive coil 4 which drives the magnetic piston 3 to move through electromagnetic induction is arranged outside the magnetic piston 3 in a winding mode.

The rear cavity 5 includes a first cavity 51, a second cavity 52 communicated with the front cavity 6, and a passage 53 for communicating the first cavity 51 and the second cavity 52, the magnetic piston 3 includes a piston main body 31, the piston main body 31 is located in the passage 53, one end of the piston main body 31 is provided with a piston pressing plate 32 for compressing the gas in the front cavity 6, the piston pressing plate 32 is located in the second cavity 52, the other end of the piston main body 31 is provided with a piston baffle 33 for preventing the magnetic piston 3 from falling off, and the piston baffle 33 is located in the first cavity 51. Specifically, the conductive coil 4 is wound on the outer peripheral wall corresponding to the passage 53 of the rear cavity 5.

The magnetic piston 3 is preferably made of a magnet, but may be made of other magnetic materials, and is within the protection scope of the present invention. The conductive coil 4 is made of a metal that can conduct electricity, such as copper, gold, or silver. The number of turns of the conductive coil 4 is equal to or greater than 3, preferably equal to or greater than 5, in order to generate a magnetic field that can be generated sufficiently large.

Wherein, the end walls of each end of the piston press plate 32 are matched with the inner cavity wall of the second cavity 52, and a lubricant is arranged between the end walls of each end of the piston press plate 32 and the inner cavity wall of the second cavity 52. The lubricant may be lubricating oil or talc, or the like.

The working principle of the screen sounding structure of the invention is as follows: after the conductive coil 4 is electrified, current flows on the right side according to the ampere law (right-hand rule) according to the current direction, the N pole is arranged on the right side of the magnetic piston 3, under the condition that the conductive coil 4 is electrified, the magnetic piston 3 moves towards the right side according to the principle that like poles of magnets repel and unlike poles of magnets attract, air in the front cavity 6 is extruded, the air pushes the screen 1 to deform outwards, air outside the screen 1 is pushed, sound pressure is generated, and sound is produced; the circular telegram current signal on the electrically conductive coil 4 changes, becomes reverse current, is the N utmost point according to ampere's law left side, and 3 right sides of magnetism piston are the N utmost point, and under the electrically conductive coil 4 circular telegram circumstances, according to the principle that the homopolar repulsion of magnet, heteropolar attraction mutually, magnetism piston 3 moves to the left side, and the air pressure in the antechamber 6 diminishes, receives the pressure of external atmospheric pressure, and screen 1 inwards warp, produces the acoustic pressure, makes sound. That is, when the conductive coil 4 receives a sine wave, a cosine wave or an electroacoustic signal, the magnetic piston 3 compresses air to generate pressure, so that the screen 1 is vibrated to generate sound pressure, and then sound is generated.

The front cavity of the invention has large cavity, good low frequency, large screen area, large volume for pushing outside air, large generated sound pressure, good three-proofing performance and no influence by appearance environment because the front cavity is formed by sealing the screen and the rear shell.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A screen sounding structure for a terminal comprises a screen (1) and a rear shell (2), and is characterized in that the screen (1) is connected with the rear shell (2) in a sealing manner to form a sealed front cavity (6), a rear cavity (5) used for balancing partial pressure of gas in the front cavity (6) is arranged in the front cavity (6), a magnetic piston (3) which can move back and forth and is used for compressing the gas in the front cavity (6) to further deform the screen (1) to generate sound pressure and send sound is arranged in the rear cavity (5), and a conductive coil (4) which drives the magnetic piston (3) to move through electromagnetic induction is wound outside the magnetic piston (3);

the rear cavity (5) comprises a first cavity (51), a second cavity (52) communicated with the front cavity (6) and a channel (53) used for communicating the first cavity (51) and the second cavity (52), the magnetic piston (3) comprises a piston main body (31), the piston main body (31) is located in the channel (53), a piston pressing plate (32) used for compressing gas in the front cavity (6) is arranged at one end of the piston main body (31), the piston pressing plate (32) is located in the second cavity (52), a piston baffle plate (33) used for preventing the magnetic piston (3) from falling off is arranged at the other end of the piston main body (31), and the piston baffle plate (33) is located in the first cavity (51).

2. A screen sound emission structure according to claim 1, wherein the end walls of the ends of the piston press plate (32) and the inner cavity wall of the second cavity (52) are matched, and a lubricant is provided between the end walls of the ends of the piston press plate (32) and the inner cavity wall of the second cavity (52).

3. The screen sounding structure of claim 2, wherein the lubricant is a lubricating oil or talc.

4. A screen sound emission structure according to claim 1, wherein the conductive coil (4) is wound around the outer peripheral wall of the rear cavity (5) corresponding to the passage (53).

5. A screen sound emission structure according to claim 1, characterized in that the magnetic piston (3) is made of a magnet.

6. A screen sound emission structure according to claim 1, characterized in that the conductive coil (4) is made of copper, gold or silver.

7. A screen sound emission structure according to claim 1, wherein the number of turns of the conductive coil (4) is not less than 3.

8. A screen sound emission structure according to claim 1, wherein said screen (1) is an O L ED screen or a L ED screen, and said rear case (2) is made of a hard metal.

9. A screen sound emission structure according to claim 1, wherein the screen (1) and the rear shell (2) are hermetically connected by means of glue dispensing.