CN219780374U - Loudspeaker suitable for AR device - Google Patents

Abstract

The utility model discloses a loudspeaker suitable for an AR device, which comprises: the shell group is provided with a bracket and a front cover arranged at the top end of the bracket; the magnetic circuit set is arranged in the shell set and comprises a magnetic cover, a middle magnet, a side magnet and a pole piece; the sound production membrane group is arranged in the shell group and comprises a vibrating diaphragm, a dome membrane, a voice coil and an FPC board, wherein the voice coil is adhered between the dome membrane and the FPC board, and the vibrating diaphragm covers the upper end face of the dome membrane; wherein the aspect ratio of the loudspeaker is between 2.5 and 3.5. According to the utility model, through the design of a specific length-width ratio, the requirement of the AR on the loudness is met while the use environment is met, the resonant frequency F0 is low, the amplitude is large, the loudspeaker can work in a free field environment, the shimmy of the strip-shaped loudspeaker is restrained, the quality of the voice coil is reduced, and the requirement of high loudness is met.

Description

Loudspeaker suitable for AR device

Technical Field

The utility model relates to the technical field of speakers, in particular to a speaker suitable for an AR device.

Background

The AR market is gradually developed at present, especially, AR glasses products, and the requirements of the AR products for speakers are not satisfied in many aspects such as size, performance, etc., especially, for AR glasses, speakers are usually installed at the earpiece positions of the AR glasses, and the shape and structure of the speakers need to be changed due to the limitation of earpiece space, so that the relationship between the aspect ratio and the loudness of the speakers is difficult to balance, the bass effect is poor, and the defects exist in the current speaker products.

Disclosure of Invention

The utility model aims to avoid the defects existing in the prior art, thereby providing the loudspeaker suitable for the AR device and meeting the AR use environment.

The utility model solves the technical problems by adopting the following technical scheme: a speaker adapted for use in an AR device, comprising:

the shell group is provided with a bracket and a front cover arranged at the top end of the bracket;

the magnetic circuit set is arranged in the shell set and comprises a magnetic cover, a middle magnet, a side magnet and a pole piece;

the sound production membrane group is arranged in the shell group and comprises a vibrating diaphragm, a dome membrane, a voice coil and an FPC board, wherein the voice coil is adhered between the dome membrane and the FPC board, and the vibrating diaphragm covers the upper end face of the dome membrane;

wherein the aspect ratio of the loudspeaker is between 2.5 and 3.5.

In several embodiments, the diaphragm includes a middle portion and an ear portion surrounding the middle portion, the ear portion having a downward concave tendency, and one end of the ear portion being disposed between the front cover and the bracket.

In several embodiments, the front cover is provided with an opening, and the opening exposes the middle portion and a part of the ear portion.

In several embodiments, the magnetic shield is arranged at the bottom end of the support, the middle magnet is arranged above the magnetic shield and is positioned at the middle part of the magnetic shield, the side magnet is arranged above the magnetic shield and is positioned around the middle magnet, and the pole piece is arranged at the upper ends of the middle magnet and the side magnet.

In several embodiments, one end of the voice coil extends between the middle magnet and the side magnet and is connected to the FPC board.

In several embodiments, a damping net is provided at the bottom of the bracket.

The utility model has the following beneficial effects:

according to the utility model, through the design of a specific length-width ratio, the requirement of the AR on loudness is met while the AR is in use environment, the resonant frequency F0 is low, the amplitude is large, the voice coil can work in a free field environment, the two-way suspension structure of the voice coil can inhibit the shimmy of the strip-shaped loudspeaker, and the copper-clad aluminum voice coil is externally connected through the FPC, so that the quality of the voice coil can be reduced, and high loudness is provided.

Drawings

The drawings described herein are for illustration purposes only of selected embodiments and are not intended to represent all possible implementations and should not be construed as limiting the scope of the present utility model.

Fig. 1 schematically shows a top view of a speaker in an embodiment;

fig. 2 schematically shows a cross-sectional structure of a speaker in a long axis direction in one embodiment;

fig. 3 schematically shows a cross-sectional structure of the short axis direction of the speaker in one embodiment.

Detailed Description

In the following, embodiments of the present utility model will be described in detail, for the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, and in the following, technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments.

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

For example, "in a certain direction", "parallel", "orthogonal", "center", "opposite", "front-rear-left-right", and the like indicate expressions of relative or absolute arrangement, and indicate not only such arrangement in a strict sense but also a state of relative displacement with tolerance or with an angle or distance that can obtain the same degree of function.

As shown in fig. 1-3, the speaker suitable for an AR device provided in this embodiment is mainly composed of a housing set, a magnetic circuit set and a sounding module, where the aspect ratio of the speaker composed of the housing set, the magnetic circuit set and the sounding module is between 2.5 and 3.5, and is generally about 3, for example, the length is 25mm, the width is 8mm, the overall thickness is about 3mm, and the design of the length, width and height meets the installation requirement of the long and narrow space of the temple, and can maintain the loudness of the speaker.

Wherein, the shell group is composed of a bracket 10 and a front cover 20 arranged at the top end of the bracket 10, which are connected by gluing, and a rectangular opening 21 is arranged at the middle part of the front cover 20.

The magnetic circuit set comprises a magnetic shield 30, a middle magnet 40, side magnets 50 and pole pieces 60, wherein the magnetic shield 30 is arranged at the bottom end of the bracket 10, the middle magnet 40 is arranged above the magnetic shield 30 and is positioned in the middle of the magnetic shield 30, four side magnets 50 are arranged above the magnetic shield 30 and are positioned around the middle magnet 40, and the pole pieces 60 are correspondingly arranged at the upper ends of the middle magnet 40 and the side magnets 50.

And the sounding module comprises a vibrating diaphragm 70, a dome film 80, a voice coil 90 and an FPC board 100, wherein the voice coil 90 is adhered between the dome film 80 and the FPC board 100, the vibrating diaphragm 70 covers the upper end face of the dome film 80, and the voice coil 90 and the FPC board 100 are fixed through adhesive bonding.

The diaphragm 70 includes a middle portion 71 and an ear portion 72 surrounding the middle portion 71, where the ear portion 72 has a downward concave tendency, specifically, the ear portion 72 is downward hanging toward the side magnet 50, one end of the ear portion 72 is adhered between the front cover 20 and the support 10, and the middle portion 71 and part of the ear portion 72 are exposed through the opening 21.

Wherein, the voice coil 90 one end extends to between the middle magnetism 40 and the limit magnetism 50 and is connected with the FPC board 100, and the high effect of main in the high 2/3 of middle magnetism 40 of FPC board position, from this the upper end of voice coil 90 bonds to ball top film 80, and the lower extreme bonds to FPC board 100, constitutes dual suspension structure, can reduce the shimmy of speaker, adopts copper package aluminium material at this voice coil, can reduce weight, keeps loudness.

And a damping net 11 with a net structure is also glued at the bottom of the bracket 10 for dust prevention and air exhaust.

The present utility model describes preferred embodiments, including the best mode known to the inventors for carrying out the utility model. Variations of these preferred embodiments will, of course, be apparent to those skilled in the art. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the utility model to be practiced otherwise than as specifically described herein. Accordingly, this utility model includes all modifications encompassed within the spirit and scope of the utility model as defined by the claims. Moreover, unless indicated otherwise or clearly contradicted by context, the present utility model includes any of the above-described factors and all possible variations thereof.

Claims (6)

1. A speaker adapted for use in an AR device, comprising:

the shell group is provided with a bracket and a front cover arranged at the top end of the bracket;

the magnetic circuit set is arranged in the shell set and comprises a magnetic cover, a middle magnet, a side magnet and a pole piece;

the sound production film group is arranged in the shell group and comprises a vibrating diaphragm, a dome film, a voice coil and an FPC board, wherein the voice coil is adhered between the dome film and the FPC board, and the vibrating diaphragm covers the upper end face of the dome film;

wherein the aspect ratio of the loudspeaker is between 2.5 and 3.5.

2. The loudspeaker of claim 1, wherein the diaphragm comprises a central portion and an ear portion surrounding the central portion, the ear portion having a downward concave tendency, and one end of the ear portion being disposed between the front cover and the bracket.

3. The speaker of claim 2, wherein the front cover is provided with an opening for exposing the middle portion and a portion of the ear.

4. The loudspeaker of claim 1, wherein the magnetic shield is disposed at a bottom end of the support, the middle magnet is disposed above the magnetic shield and is located in a middle portion of the magnetic shield, the side magnet is disposed above the magnetic shield and is located around the middle magnet, and the pole pieces are disposed at upper ends of the middle magnet and the side magnet.

5. The speaker of claim 4, wherein one end of the voice coil extends between the middle magnet and the side magnet and is connected to the FPC board.

6. The loudspeaker of claim 4, wherein the bottom of the bracket is provided with a damping net.