CN216391409U

CN216391409U - Rear cavity pressure relief structure for micro loudspeaker

Info

Publication number: CN216391409U
Application number: CN202123220813.6U
Authority: CN
Inventors: 肖宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-04-26
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a rear cavity pressure relief structure for a micro-speaker, which comprises a micro-speaker body, wherein the micro-speaker body comprises a sound frame, a magnet and a sound basin, the sound frame comprises a rear cavity and a front cavity, the magnet is arranged in the rear cavity, the sound basin is arranged in the front cavity and connected with the sound frame, the bottom of the sound basin is fixedly connected with a framework, a voice coil is sleeved on the framework and electrically connected with the magnet, the framework is connected with the sound frame through elastic waves, a pressure relief pipe is fixedly connected in the pressure relief pipe, and the interior of the pressure relief pipe is divided into a front chamber, a middle chamber and a rear chamber by a first partition plate and a second partition plate. The pressure that can make miniature loudspeaker rear chamber is in stable state all the time, in time releases the pressure when rear chamber pressure increases, has guaranteed miniature loudspeaker's audio effects, makes sound frequency stable, has also protected miniature loudspeaker's subassembly simultaneously, has improved miniature loudspeaker's life.

Description

Rear cavity pressure relief structure for micro loudspeaker

Technical Field

The utility model relates to the technical field of micro-speaker equipment, in particular to a rear cavity pressure relief structure for a micro-speaker.

Background

The micro-speaker is mostly used for mobile devices such as mobile phones and earphones. The miniature loudspeaker back cavity space is limited, because the voice coil loudspeaker voice coil vibration drives the air vibration can make the back cavity pressure increase rapidly, and the miniature loudspeaker back cavity among the prior art does not set up pressure relief device, and the pressure of rapid increase can influence miniature loudspeaker's sound effect, makes the unstable condition of sound appearance frequency, also can cause the damage of certain degree to miniature loudspeaker simultaneously, influences miniature loudspeaker's life.

Disclosure of Invention

In view of the above-mentioned shortcomings or drawbacks of the prior art, it is desirable to provide a rear cavity pressure relief structure for a micro-horn.

According to the technical scheme provided by the embodiment of the application, a rear cavity pressure relief structure for a micro-speaker comprises a micro-speaker body, wherein the micro-speaker body comprises a sound frame, a magnet and a sound basin, the sound frame comprises a rear cavity and a front cavity, the magnet is arranged in the rear cavity, the sound basin is arranged in the front cavity and connected with the sound frame, the bottom of the sound basin is fixedly connected with a framework, a voice coil is sleeved on the framework, the voice coil is electrically connected with the magnet, the framework is connected with the sound frame through elastic waves, a pressure relief pipe is fixedly connected in the pressure relief pipe, the first partition plate and the second partition plate divide the pressure relief pipe into a front chamber, a middle chamber and a rear chamber, the front chamber, the middle chamber and the rear chamber are sequentially distributed from the end close to the micro-speaker body, an exhaust pipe is arranged on the middle chamber, and a sealing plate is arranged in the middle chamber, the sealing plate is fixedly connected with a sliding rod, a limiting block is arranged in the rear chamber, and the sealing plate is connected with the first partition plate through a spring.

The pressure relief pipe is communicated with the rear cavity.

The end of the pressure relief pipe, which is far away from the micro-horn body, is of an arc-shaped structure.

The second clapboard is close to the end of the micro-speaker body, and a pressure relief opening is formed in the second clapboard.

The other end of the sliding rod penetrates through the first partition plate, the sliding rod and the sealing plate are coaxial, and the spring is sleeved on the sliding rod.

The limiting block is of a hemispherical solid structure and is fixedly connected with the sliding rod.

To sum up, the beneficial effect of this application: the utility model can make the pressure of the back cavity of the micro-speaker in a stable state all the time, and timely release the pressure when the pressure of the back cavity is increased, thereby ensuring the sound effect of the micro-speaker, stabilizing the sound frequency, simultaneously protecting the components of the micro-speaker and prolonging the service life of the micro-speaker.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a half sectional view of the present invention;

FIG. 3 is a semi-sectional view of the pressure relief tube of the present invention.

Reference numbers in the figures: the miniature loudspeaker comprises a miniature loudspeaker body-1, a sound frame-1.1, a rear cavity-1.1.1, a front cavity-1.1.2, a magnet-1.2, a sound basin-1.3, a framework-1.4, a voice coil-1.5, an elastic wave-1.6, a pressure relief pipe-2, a first partition plate-2.1, a second partition plate-2.2, a pressure relief opening 2.2.1, a front chamber-2.3, a middle chamber-2.4, an exhaust pipe 2.4.1, a rear chamber-2.5, a sealing plate-2.6, a slide rod-2.6.1, a limiting block-2.7 and a spring-2.8;

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in figure 1, a rear cavity pressure relief structure for a micro-horn comprises a micro-horn body 1 and a pressure relief pipe 2, wherein the pressure relief pipe 2 is fixedly connected with the micro-horn body 1. The end of the pressure relief pipe 2, which is far away from the micro-horn body 1, is of an arc-shaped structure.

As shown in fig. 2, miniature loudspeaker body 1 includes sound frame 1.1, magnet 1.2 and sound basin 1.3, sound frame 1.1 includes back chamber 1.1.1 and antechamber 1.1.2, magnet 1.2 sets up in the back chamber 1.1.1, sound basin 1.3 sets up in the antechamber 1.1.2 and with sound frame 1.1 is connected, the bottom rigid coupling of sound basin 1.3 has skeleton 1.4, the cover is equipped with voice coil 1.5 on skeleton 1.4, voice coil 1.5 and magnet 1.2 electric connection, connect through bullet ripples 1.6 between skeleton 1.4 and sound frame 1.1.

As shown in fig. 3, a first partition plate 2.1 and a second partition plate 2.2 are fixedly connected in the pressure release pipe 2, the first partition plate 2.1 and the second partition plate 2.2 divide the interior of the pressure release pipe 2 into a front chamber 2.3, a middle chamber 2.4 and a rear chamber 2.5, a sealing plate 2.6 is arranged in the middle chamber 2.4, a sliding rod 2.6.1 is fixedly connected on the sealing plate 2.6, a limiting block 2.7 is arranged in the rear chamber 2.5, the sealing plate 2.6 is connected with the first partition plate 2.1 through a spring 2.8, the second partition plate 2.2 is close to the end of the micro-horn body 1, and a pressure release port 2.2.1 is formed in the second partition plate 2.2. The front chamber 2.3, the middle chamber 2.4 and the rear chamber 2.5 are distributed in sequence from the end close to the micro-horn body 1, and an exhaust pipe 2.4.1 is arranged on the middle chamber 2.4. The other end of the sliding rod 2.6.1 penetrates through the first partition plate 2.1, the sliding rod 2.6.1 and the sealing plate 2.6 are coaxial, and the spring 2.8 is sleeved on the sliding rod 2.6.1. The limiting block 2.7 is of a hemispherical solid structure, and the limiting block 2.7 is fixedly connected with the sliding rod 2.6.1.

The pressure relief pipe 2 is communicated with the rear cavity 1.1.1.

Through setting up the pressure release pipe in the back chamber, drive the air vibration when the voice coil loudspeaker voice coil vibration, when making back chamber pressure increase rapidly, too big pressure promotes the closing plate motion, makes the pressure release mouth open, and pressure is discharged along the blast pipe that sets up on the pressure release pipe, and the spring is extruded in the time of the closing plate motion, makes the spring be in compression state, when the pressure release to a certain extent, the spring resets and pushes back the closing plate to contact with the second baffle, seals the pressure release mouth once more, accomplishes the pressure release.

The foregoing description is only exemplary of the preferred embodiments of the application and is provided for the purpose of illustrating the general principles of the technology and the like. Meanwhile, the scope of the utility model according to the present application is not limited to the technical solutions in which the above-described technical features are combined in a specific manner, and also covers other technical solutions in which the above-described technical features or their equivalent are combined arbitrarily without departing from the inventive concept described above. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The utility model provides a miniature loudspeaker are with back chamber pressure release structure, characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the miniature loudspeaker body (1), miniature loudspeaker body (1) includes sound frame (1.1), magnet (1.2) and sound basin (1.3), sound frame (1.1) includes back chamber (1.1.1) and antechamber (1.1.2), magnet (1.2) set up in back chamber (1.1.1), sound basin (1.3) set up in antechamber (1.1.2) and be connected with sound frame (1.1),

pipe (2) are pressed to the pressure release, the rigid coupling has first baffle (2.1) and second baffle (2.2) in pipe (2) is pressed to the pressure release, first baffle (2.1) and second baffle (2.2) will divide into antechamber (2.3), mesochamber (2.4) and back room (2.5) in pipe (2) are pressed to the pressure release, be provided with closing plate (2.6) in mesochamber (2.4), the rigid coupling has slide bar (2.6.1) on closing plate (2.6), be provided with stopper (2.7) in back room (2.5), connect through spring (2.8) between closing plate (2.6) and first baffle (2.1).

2. The rear cavity pressure relief structure for the micro-speaker as claimed in claim 1, wherein: the bottom rigid coupling of sound basin (1.3) has skeleton (1.4), the cover is equipped with voice coil loudspeaker voice coil (1.5) on skeleton (1.4), voice coil loudspeaker voice coil (1.5) and magnet (1.2) electric connection, connect through bullet ripples (1.6) between skeleton (1.4) and sound frame (1.1).

3. The rear cavity pressure relief structure for the micro-speaker as claimed in claim 1, wherein: the pressure relief pipe (2) is communicated with the rear cavity (1.1.1).

4. The rear cavity pressure relief structure for the micro-speaker as claimed in claim 1, wherein: the end of the pressure relief pipe (2) far away from the micro-horn body (1) is of an arc-shaped structure.

5. The rear cavity pressure relief structure for the micro-speaker as claimed in claim 1, wherein: the second partition plate (2.2) is close to the end of the miniature horn body (1), and a pressure relief opening (2.2.1) is formed in the second partition plate (2.2).

6. The rear cavity pressure relief structure for the micro-speaker as claimed in claim 1, wherein: the front chamber (2.3), the middle chamber (2.4) and the rear chamber (2.5) are sequentially distributed from the end close to the micro-horn body (1), and an exhaust pipe (2.4.1) is arranged on the middle chamber (2.4).

7. The rear cavity pressure relief structure for the micro-speaker as claimed in claim 1, wherein: the other end of the sliding rod (2.6.1) penetrates through the first partition plate (2.1), the sliding rod (2.6.1) and the sealing plate (2.6) are coaxial, and the spring (2.8) is sleeved on the sliding rod (2.6.1).

8. The rear cavity pressure relief structure for the micro-speaker as claimed in claim 1, wherein: the limiting block (2.7) is of a hemispherical solid structure, and the limiting block (2.7) is fixedly connected with the sliding rod (2.6.1).