CN215647298U - Acoustic device and earphone - Google Patents

Abstract

The utility model provides an acoustic device and an earphone. The acoustic device comprises a front shell, a rear shell, a first sound-generating element, a second sound-generating element and a sound-emitting channel, wherein the first sound-generating element is positioned in a containing space formed by the front shell and the rear shell; the first sound-emitting element divides the accommodating space into an acoustic front cavity positioned at one end of the front shell and an acoustic rear cavity positioned at one end of the rear shell, and the acoustic front cavity is communicated with the sound outlet channel; a filtering structure is arranged between the acoustic front cavity and the sound outlet channel and is used for filtering the sound with specific frequency in the sound emitted by the first sound-emitting element. The acoustic device can filter the sound emitted by the first sound-emitting element in the acoustic device at a specific frequency, and then the filtered sound is connected with the sound emitted by the second sound-emitting element in the acoustic device, so that the sound quality of the sound finally output by the acoustic device is improved.

Description

Acoustic device and earphone

Technical Field

The utility model relates to the field of acoustics, in particular to an acoustic device and an earphone.

Background

The existing sound production device is generally characterized in that an acoustic front cavity is connected with a sound outlet channel, the acoustic front cavity and a sound production element form a resonator to produce sound through the sound outlet channel, and the acoustic front cavity and the sound production element are similar in structure. Such a structure has some limitations, for an acoustic device with multiple sound emitting elements, the sound frequencies emitted by different sound emitting elements overlap each other so that the sound definition after splicing is reduced, and secondly, the frequency division design is not good in frequency response, which is a fatal defect for high-requirement HIFI or monitoring earphones.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an acoustic device and an earphone to overcome the disadvantages of the prior art.

The utility model provides the following technical scheme:

an acoustic device comprises a front shell, a rear shell, a first sound generating element, a second sound generating element and a sound outlet channel, wherein the first sound generating element is positioned in a containing space formed by the front shell and the rear shell, the sound outlet channel is positioned at one end, far away from the rear shell, of the front shell, and the second sound generating element is positioned in the sound outlet channel;

the first sound-emitting element divides the accommodating space into an acoustic front cavity positioned at one end of the front shell and an acoustic rear cavity positioned at one end of the rear shell, and the acoustic front cavity is communicated with the sound outlet channel;

and a filtering structure is arranged between the acoustic front cavity and the sound outlet channel and is used for filtering the sound with specific frequency in the sound emitted by the first sound-emitting element.

As a further alternative to the acoustic device, the filter structure includes a first spiral groove and a first sealing member, the first spiral groove is disposed at one end of the front casing close to the acoustic front cavity, the first sealing member is disposed on the first spiral groove to form a first spiral channel, and the first spiral channel communicates the acoustic front cavity and the sound outlet channel.

As a further optional scheme for the acoustic device, the rear case is provided with a rear cavity air release structure and a rear cavity air release hole, and the rear cavity air release structure communicates the acoustic rear cavity with the rear cavity air release hole.

As a further optional scheme to acoustic device, the air release structure of back chamber includes second spiral groove and second sealing member, second spiral groove is located the backshell is close to cavity one end behind the acoustics, the second sealing member lid is located on the second spiral groove in order to form second spiral channel, second spiral channel intercommunication the acoustics back chamber with the hole is leaked in the back chamber.

As a further alternative to the acoustic device, the first spiral channel and the second spiral channel are identical in shape and structural size.

As a further alternative to the acoustic device, a first groove structure is provided at an end of the front housing near the rear housing for mounting the first sound-emitting element.

As a further optional solution to the acoustic device, a second groove structure is disposed at one end of the sound outlet channel close to the front shell, and is used for mounting the second sound generating element.

As a further optional solution to the acoustic device, the first sound generating element is a moving-coil sound generating element, and the second sound generating element is a moving-iron sound generating element.

The utility model also provides an earphone comprising the acoustic device.

As a further alternative to the earphone, an end of the sound outlet channel remote from the front shell is detachably provided with a resilient earplug.

The embodiment of the utility model has the following advantages:

the acoustic device can carry out the filtration of specific frequency to the sound that its inside first sound generating element sent, then links up the sound that the sound after will filtering rather than inside second sound generating element sent again to promote the tone quality of acoustic device final output sound.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 shows a schematic diagram of an explosive structure of an acoustic device in one embodiment;

FIG. 2 shows a schematic cross-sectional view of an acoustic device in an embodiment;

FIG. 3 shows an exploded view of a filter structure in one embodiment;

FIG. 4 is a schematic cross-sectional view of a filter structure in one embodiment;

FIG. 5 is a schematic diagram illustrating the explosive structure of the relief structure of the rear cavity in one embodiment;

FIG. 6 is a schematic cross-sectional view of a relief structure of the rear cavity in one embodiment;

fig. 7 shows a schematic diagram of an exploded structure of the headset in an embodiment.

Description of the main element symbols:

100-a front shell; 200-a rear shell; 300-a first sound-emitting element; 400-a second sound emitting element; 500-a sound channel; 600-an acoustic front cavity; 700-acoustic back volume; 800-an acoustic device; 900-an earphone; 110-a filter structure; 111-a first spiral groove; 112-a first seal; 210-a rear cavity venting structure; 211-a second spiral groove; 212-a second seal; 213-rear cavity air-release hole; 510-resilient earplug.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the terms "first", "second" and "first" 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example one

Referring to fig. 1 to 2, an embodiment of the present application provides an acoustic device 800. The acoustic device 800 is used in a headphone to output sound to the first sound emitting element 300 and the second sound emitting element 400 included in the interior thereof. The acoustic device 800 can filter the sound emitted by the first sound emitting element 300 inside the acoustic device at a specific frequency, and then link the filtered sound with the sound emitted by the second sound emitting element 400 inside the acoustic device to improve the final sound quality of the sound output by the acoustic device 800.

In some specific embodiments, the acoustic device 800 includes a front case 100, a rear case 200, a first sound emitting element 300, a second sound emitting element 400, and a sound emitting channel 500. The first sound generating element 300 is located in a containing space (not labeled in the figures) formed by the front shell 100 and the rear shell 200, the sound outlet channel 500 is communicated with the containing space and located at one end of the front shell 100 far away from the rear shell, and the second sound generating element 400 is located inside the sound outlet channel 500. After the sound emitted by the first sound emitting element 300 passes through the accommodating space, the sound is connected with the sound emitted by the second sound emitting element 400 in the sound emitting channel 500, and finally the connected sound is output through the sound emitting channel 500.

Further, the first sound-emitting element 300 separates the accommodating space into an acoustic front cavity 600 and an acoustic rear cavity 700. The acoustic front chamber 600 is located at one end of the first sound-emitting element 300 close to the front case 100, and is used for transmitting sound emitted by the first sound-emitting element 300; the acoustic rear cavity 700 is located at an end of the first sound-emitting element 300 close to the rear case 200, for providing a resonance space adapted to the acoustic front cavity 600.

Further, a filtering structure 110 is disposed between the acoustic front cavity 600 and the sound outlet channel 500. The filtering structure 110 is configured to filter a part of the sounds with specific frequencies emitted by the first sound emitting element 300, so that the connection between the sounds emitted by the first sound emitting element 300 and the sounds emitted by the second sound emitting element 400 is more reasonable and smooth, and meanwhile, the final output sound of the sound emitting channel 500 is clearer and has better quality.

Example two

Referring to fig. 1 to 6, an embodiment of the present application provides an acoustic device 800. The acoustic device 800 is used in a headphone to output sound to the first sound emitting element 300 and the second sound emitting element 400 included in the interior thereof. The present embodiment is an improvement on the technology of the first embodiment, and compared with the first embodiment, the difference is that:

referring specifically to fig. 3 and 4, in some embodiments, the filter structure 110 includes a first spiral groove 111 and a first sealing member 112. The first spiral groove 111 is integrally formed on the front case 100 and is located at one end of the front case 100 near the acoustic front cavity 600. Further, the first sealing member 112 covers the first spiral groove 111, and the first sealing member 112 and the first spiral groove 111 form a first spiral channel (not shown). The first spiral channel connects the acoustic front chamber 600 and the sound outlet channel 500.

In some specific embodiments, the material of the front shell 100 may be plastic, wood material, or metal material, and in this embodiment, the material is preferably plastic.

In some specific embodiments, the material of the first sealing element 112 may be a thermoplastic elastomer material, a rubber material, or a sponge material with certain elasticity, and in this embodiment, the material of the rubber material is preferred.

Further, the first spiral passage may have a specific cut-off frequency by precisely designing the length and the sectional dimension of the first spiral passage, and thus, the first spiral passage may filter the sound emitted from the first sound emitting element 300, which is higher than the cut-off frequency. Meanwhile, the length of the transmission channel for emitting sound to the first sound emitting element 300 can be increased by the spiral design of the first spiral channel, the longer the transmission channel is, the larger the acoustic impedance is, and when the frequency wavelength of the sound passing through the transmission channel reaches one quarter of the length of the transmission channel, the amplitude of the sound reaches a maximum value, so that the low-frequency sound can be boosted, the representation of the low-frequency sound is facilitated, and the low frequency of the sound output by the acoustic device 800 in the embodiment is stronger.

In some embodiments, referring specifically to fig. 2, 5 and 6, the rear housing 200 is provided with a rear cavity vent structure 210 and a rear cavity vent hole 213. The rear cavity air release structure 210 is communicated with the acoustic rear cavity 700 and the rear cavity air release hole 213, and is used for balancing the pressure between the acoustic rear cavity 700 and the acoustic front cavity 600, so that the sound emitted by the first sound-emitting element 300 is more natural, and the sound quality is better.

In some embodiments, the rear cavity venting structure 210 includes a second spiral groove 211 and a second seal 212. The second spiral groove 211 is integrally formed on the rear case 200 and is located at an end of the rear case 200 close to the acoustic rear cavity 700. Further, the second sealing element 212 covers the second spiral groove 211, and the second sealing element 212 and the second spiral groove 211 form a second spiral channel (not shown in the figure), and the second spiral channel specifically communicates the acoustic back cavity 700 and the back cavity air release hole 213. Since the sound generated by the first sound-generating element 300 is partially discharged through the acoustic back cavity 700 and the back cavity venting structure 210, and the length of the sound transmission channel of the back cavity venting structure 210 is increased due to the design of the second spiral channel, the longer the sound transmission channel is, the greater the acoustic impedance is, so that the low frequency sound output by the acoustic device 800 in this embodiment is stronger.

In some specific embodiments, the material of the rear case 200 is the same as that of the front case 100, and may be plastic, wood, or metal, and in this embodiment, the material is preferably plastic.

In some specific embodiments, the material of the second sealing element 212 is the same as the material of the first sealing element 112, and a material with certain elasticity such as a thermoplastic elastomer material, a rubber material, or a sponge material may be selected.

In some embodiments, the shape and the structural size of the second spiral groove 211 and the first spiral groove 111 are designed to be the same, and the shape and the structural size of the second seal 212 and the first seal 112 are also designed to be the same. Such a design allows the first spiral passage and the second spiral passage to have a shape and a structural size identical to each other, so that the air resistance of the acoustic front chamber 600 and the air resistance of the acoustic rear chamber 700 are substantially the same by the sound emitted from the first sound-emitting element 300. Further, when the first sound-emitting element 300 operates, the acoustic front cavity 600 and the acoustic rear cavity 700 reach an optimal balance state, so that the sound emitted by the first sound-emitting element 300 is not easily distorted, and the quality of the sound emitted by the acoustic device 800 in this embodiment is further improved.

Referring to fig. 2, in some embodiments, a first groove structure (not shown) is disposed at an end of the front housing 100 close to the rear housing 200 for installing and fixing the first sound emitting element 300. A step is arranged at the bottom of the first groove structure, and one end of the first sound-emitting element 300 close to the bottom of the first groove structure abuts against the step, so that the acoustic front cavity 600 is isolated from the acoustic rear cavity 700 in space, and the interference of the acoustic rear cavity 700 on the sound transmission of the acoustic front cavity 600 is reduced.

In some embodiments, the first sound generating element 300 is a moving coil sound generating element. Because moving-coil sound generating element has better low frequency performance, therefore its sound process of making sound first spiral channel filters and is higher than cutoff frequency's sound, simultaneously, first spiral channel carries out the pressure boost to low frequency sound after, the sound of acoustic device 800 output have better low frequency audio.

Referring to fig. 2, in some embodiments, the sound outlet channel 500 has a second groove structure near one end of the front housing 100 for fixedly mounting the second sound generating element 400.

In some specific embodiments, the material of the sound outlet channel 500 may be plastic, wood material, or metal material, and in this embodiment, the material is preferably plastic.

In some embodiments, the second sound generating element 400 is a moving-iron type sound generating element. Because move indisputable formula sound generating component and possess stronger analytic power, sound is penetrating, the characteristics that the detail is more abundant, consequently it possesses better high frequency performance. Meanwhile, on the basis that the first sound generating element 300 adopts a moving-coil sound generating element, the sound output by the acoustic device 800 has the advantages of low frequency and high frequency, and the quality of the sound is further improved.

EXAMPLE III

Referring to fig. 7, the earphone 900 provided in this embodiment includes the acoustic device 800 described in any of the above embodiments. The earphone 900 adjusts and outputs sound through the acoustic device 800.

In some embodiments, the end of the sound outlet channel 500 away from the front shell 100 is detachably provided with a resilient earplug 510, which can improve the comfort of the user.

In some embodiments, the headset 900 further includes a bluetooth receiver, a charging power source, and a charging interface, so as to be provided as a bluetooth wireless headset for users. In some further embodiments, the headset 900 includes a headset cord for connecting to an electronic device for use by a user as a wired headset.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (10)

1. An acoustic device is characterized by comprising a front shell, a rear shell, a first sound generating element, a second sound generating element and a sound generating channel, wherein the first sound generating element is positioned in a containing space formed by the front shell and the rear shell, the sound generating channel is positioned at one end of the front shell, which is far away from the rear shell, and the second sound generating element is positioned in the sound generating channel;

the first sound-emitting element divides the accommodating space into an acoustic front cavity positioned at one end of the front shell and an acoustic rear cavity positioned at one end of the rear shell, and the acoustic front cavity is communicated with the sound outlet channel;

and a filtering structure is arranged between the acoustic front cavity and the sound outlet channel and is used for filtering the sound with specific frequency in the sound emitted by the first sound-emitting element.

2. The acoustic device of claim 1, wherein the filter structure comprises a first spiral groove formed in an end of the front housing adjacent to the acoustic front cavity, and a first sealing member covering the first spiral groove to form a first spiral channel that communicates the acoustic front cavity and the sound outlet channel.

3. The acoustic device of claim 2, wherein the back housing is provided with a back cavity vent structure and a back cavity vent hole, the back cavity vent structure communicating the acoustic back cavity with the back cavity vent hole.

4. The acoustic device of claim 3, wherein the back cavity vent structure comprises a second spiral groove and a second sealing member, the second spiral groove is disposed at an end of the back housing adjacent to the back cavity, the second sealing member covers the second spiral groove to form a second spiral channel, and the second spiral channel communicates the back cavity with the back cavity vent hole.

5. The acoustic device of claim 4, wherein the first spiral channel conforms to the shape and structural dimensions of the second spiral channel.

6. The acoustic device of claim 1, wherein the front housing is provided with a first recess structure near one end of the rear housing for mounting the first sound-emitting element.

7. The acoustic device of claim 1, wherein the sound outlet channel is provided with a second groove structure near one end of the front housing for mounting the second sound emitting element.

8. The acoustic device according to claim 1, wherein the first sound-generating element is a moving-coil sound-generating element, and the second sound-generating element is a moving-iron sound-generating element.

9. An earphone, characterized in that it comprises an acoustic device according to any one of claims 1 to 8.

10. The earphone as claimed in claim 9, wherein the sound outlet channel is detachably provided with a resilient earplug at an end remote from the front shell.

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