CN117857986A - Speaker device - Google Patents

Abstract

A speaker device is mounted on an electronic device and comprises a speaker module and a first loop pipe. The speaker module has a housing and a speaker unit. The shell is provided with a main sound cavity and a sound outlet. The speaker unit is arranged in the shell, and comprises a vibrating diaphragm which is communicated with the sound outlet. The first loop pipe is provided with a first end and a second end, and the first end is connected with the shell. The length of the first loop pipe is at least 10mm, and the inner diameter of the first loop pipe is at least 2mm.

Description

Speaker device

Technical Field

The present disclosure relates to a speaker apparatus, and more particularly, to a speaker apparatus capable of increasing a sound pressure level of a low frequency.

Background

With the development of technology, many electronic devices (such as notebook computers) are popular and popular products. Among these, notebook computers are popular and popular among consumer products nowadays, and users can execute various applications on the notebook computers to achieve various desired purposes, such as watching movies, playing games, browsing web pages, or watching electronic books.

Generally, electronic devices such as notebook computers are equipped with at least one speaker device configured to emit sounds such as music. However, the conventional notebook computer is designed to be lighter and thinner, so that the size of the speaker device must be reduced, and the volume of the sound cavity of the speaker device is reduced accordingly. Due to the insufficient volume of the sound cavity, the sound effect emitted by the speaker device cannot meet the requirements of users, especially the low-frequency sound effect.

Therefore, how to design a speaker device capable of improving the low frequency effect is a problem to be studied and solved.

Disclosure of Invention

In view of the above, an object of the present disclosure is to provide a speaker device to solve the above-mentioned problems.

The present disclosure provides a speaker device mounted on an electronic device, and the speaker device includes a speaker module and a first loop pipe. The speaker module has a housing and a speaker unit. The shell is provided with a main sound cavity and a sound outlet. The speaker unit is arranged in the shell, and comprises a vibrating diaphragm which is communicated with the sound outlet. The first loop pipe is provided with a first end and a second end, and the first end is connected with the shell. The length of the first loop pipe is at least 10mm, and the inner diameter of the first loop pipe is at least 2mm.

According to some embodiments of the disclosure, the first end has a first opening, which is connected to the main sound cavity, and the second end has a second opening, which is connected to a receiving space of the electronic device.

According to some embodiments of the disclosure, the housing has a rectangular structure, and the first loop pipe has a first section and a second section, the first end and the second end are respectively located at the first section and the second section, the first section is parallel and adjacent to a first side of the rectangular structure, and the second section is parallel and adjacent to a second side of the rectangular structure.

According to some embodiments of the disclosure, the speaker device further includes a regulating unit disposed in the first loop pipe, and the regulating unit is disposed adjacent to the second opening.

According to some embodiments of the disclosure, the speaker device further includes a first extension unit corresponding to a shape of at least one internal element of the electronic device, the second end of the first loop pipe is connected to the first extension unit, and a first sub-sound cavity formed by the first extension unit is connected to the first loop pipe and the main sound cavity through the second end.

According to some embodiments of the present disclosure, the first expansion unit is made of a metal material.

According to some embodiments of the present disclosure, the first sub-sound cavity is filled with a porous material, which includes at least one of zeolite powder and activated carbon.

According to some embodiments of the present disclosure, the junction of the first end and the housing is sealed by a sealing element and the junction of the second end and the first expansion cell is sealed by another sealing element, wherein the sealing elements comprise silicone (silicone) or a sealing ring.

According to some embodiments of the disclosure, the first expandable monomer is a recyclable and inflatable bag.

According to some embodiments of the disclosure, the speaker device further includes a second loop pipe and a second expansion unit, wherein the second loop pipe is connected between the first expansion unit and the second expansion unit, so that a second sub-sound cavity formed by the second expansion unit is communicated with the first sub-sound cavity and the main sound cavity through the second loop pipe.

The disclosure provides a speaker device, which comprises a speaker module and a first loop pipe. The first end of the first loop pipe is connected to the shell of the loudspeaker module, the second end of the first loop pipe is a free end which is not closed, and the first loop pipe is provided with a second opening, so that a main sound cavity formed by the shell is communicated with the outside air. Based on such a design, the low-frequency sound output effect of the speaker device can be effectively improved.

Additionally, in some embodiments, the speaker apparatus may further comprise at least one expansion cell connected to the speaker module through at least one loop pipe. The auxiliary sound cavity formed by the expansion unit and the main sound cavity of the loudspeaker module can jointly form a larger sound cavity, so that the low-frequency sound output effect of the loudspeaker device can be further improved.

Furthermore, in some embodiments, a conditioning unit may be disposed within the loop and/or the expansion unit may be filled with a porous material. Such a design would reduce the moving velocity of the air molecules so that the resonance frequency would be reduced, and thus the sound pressure level of the low frequency would be increased.

Drawings

The disclosure can be clearly understood from the following detailed description taken in conjunction with the accompanying drawings. It is emphasized that, in accordance with the practice in the industry, various features are not drawn to scale and are used for illustration purposes only. In fact, the dimensions of the various features may be arbitrarily expanded or reduced for clarity of discussion.

Fig. 1 is a schematic diagram of a portion of an electronic device according to an embodiment of the disclosure.

Fig. 2 is a schematic perspective view of a speaker apparatus according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of a portion of an electronic device according to another embodiment of the disclosure.

Fig. 4 is a schematic perspective view of a speaker apparatus according to another embodiment of the present disclosure.

Fig. 5 is a graph showing frequency versus sound pressure level for a speaker apparatus according to various embodiments of the present disclosure and a known speaker apparatus.

Fig. 6 shows a frequency versus impedance plot for a speaker apparatus according to various embodiments of the present disclosure and for the known speaker apparatus.

Fig. 7 shows a frequency versus sound pressure level plot of a speaker apparatus according to another embodiment of the present disclosure and a known speaker apparatus.

Fig. 8 shows a frequency versus impedance plot for a speaker apparatus according to another embodiment of the present disclosure and the known speaker apparatus.

Fig. 9 is a schematic view of a part of the structure of an electronic device according to another embodiment of the present disclosure.

Fig. 10 is a schematic perspective view of a speaker apparatus according to another embodiment of the present disclosure.

The reference numerals are as follows:

10 electronic device

11 display module

12 host module

13 motherboard

14 first electronic component

15 second electronic component

16 third electronic component

17 fourth electronic component

18 fifth electronic component

50L, 50R loudspeaker device

100 speaker module

102 casing body

1021 main sound cavity

1022 sound outlet

104 speaker unit

1041 vibrating diaphragm

110 first loop pipe

110D inner diameter

111 first end

1111 first opening

112 second end

1121 a second opening

120 casing

121 accommodating space

130 second loop pipe

150 first expansion monomer

1501 first sub-sound cavity

155 porous material

157 sealing element

160 first expansion monomer

170 second expansion monomer

1701 second auxiliary sound cavity

200 regulating monomer

CV01, CV11, CV21, CV31:

CV02, CV12, CV22, CV32:

GP1 gap

SG11 first segment

SG12 second section

SG21 first segment

SG22 second section

SS1 first side

SS2 second side

X is X axis

Y-Y axis

Z is Z axis

Detailed Description

The present disclosure will be described in more detail with reference to the following examples, which are intended to provide an understanding of the present disclosure. The arrangement of the elements in the embodiments is for illustration, and is not intended to limit the disclosure. And portions of the reference numerals in the embodiments are repeated, for simplicity of explanation, not to be construed as implying any relevance between the various embodiments. The directional terms mentioned in the following embodiments are, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the attached drawings. Thus, directional terminology is used for purposes of illustration and is not intended to be limiting of the disclosure.

Ordinal numbers such as "first," "second," "third," and the like in the description and in the claims are used for distinguishing between two different elements having the same name and not necessarily for describing a sequential order.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a partial structure of an electronic device 10 according to an embodiment of the disclosure. The electronic device 10 may be a notebook computer, and has a display module 11 and a host module 12. The host module 12 is connected to the display module 11, and the host module 12 may include a motherboard 13, a first electronic component 14, a second electronic component 15, a third electronic component 16, a fourth electronic component 17, and a fifth electronic component 18. It is noted that the upper housing (generally referred to as a C-piece) of the host module 12 is omitted herein for clarity of illustration of the internal structure of the host module 12.

The first electronic component 14 is, for example, an image output connector, the second electronic component 15 is, for example, a network connector, the third electronic component 16 is, for example, a battery, the fourth electronic component 17 is, for example, a USB connector, and the fifth electronic component 18 is, for example, an expansion connection port, but not limited thereto. The motherboard 13 and the electronic components are accommodated in an accommodating space 121 of the host module 12.

Furthermore, the electronic device 10 may further include two speaker devices 50L, 50R disposed on the motherboard 13. The speaker device 50L is disposed between the first electronic component 14 and the second electronic component 15, and the speaker device 50R is disposed between the fourth electronic component 17 and the fifth electronic component 18.

Next, referring to fig. 1 and fig. 2, fig. 2 is a schematic perspective view of a speaker device 50L according to an embodiment of the disclosure. In this embodiment, the speaker device 50L includes a speaker module 100 and a first loop pipe 110, and the speaker module 100 has a housing 102 and a speaker unit 104.

The housing 102 has a main sound chamber 1021 and a sound outlet 1022, and the speaker unit 104 is disposed in the housing 102 and is connected to the main sound chamber 1021. The speaker unit 104 includes a diaphragm 1041, and the diaphragm 1041 is connected to the sound outlet 1022. The speaker unit 100 may further include a coil and a magnet (not shown), wherein the coil may be connected to the diaphragm 1041, and when the coil is energized, the coil and the magnet may generate electromagnetic driving force to drive the diaphragm 1041 to move, so as to convert the current signal into an audio signal.

The first loop pipe 110 may be made of soft material. For example, the first loop pipe 110 may be made of soft plastic material, but is not limited thereto. Furthermore, the total length of the first loop pipe 110 is at least 10mm, and the inner diameter 110D of the first loop pipe 110 is at least 2mm.

In this embodiment, the first loop pipe 110 may have a first end 111 and a second end 112. The first end 111 is connected to the housing 102, and the first end 111 has a first opening 1111 in communication with the main sound chamber 1021, and the second end 112 has a second opening 1121 in communication with the accommodating space 121 of the electronic device 10. That is, the second end 112 is a free end that is not closed.

In this embodiment, the housing 102 has a rectangular structure, and the first loop pipe 110 can be bent into a first segment SG11 and a second segment SG12. As shown in fig. 2, the first end 111 and the second end 112 are located at the first segment SG11 and the second segment SG12, respectively.

As shown in fig. 1, since the gap between the speaker device 50L and the housing 120 of the host module 12 is small, and the gap between the speaker device 50L and the second electronic component 15 is small, the first segment SG11 may be configured to be parallel and adjacent to a first side SS1 of the rectangular body structure, and the second segment SG12 may be configured to be parallel and adjacent to a second side SS2 of the rectangular body structure.

In this embodiment, the speaker device 50L may further include a regulating unit 200 disposed in the first loop pipe 110, and the regulating unit 200 is disposed adjacent to the second opening 1121.

For example, the distance of the adjustment cell 200 from the second opening 1121 may be ten to twenty percent of the total length of the first loop pipe 110. In this embodiment, the distance between the regulating unit 200 and the second opening 1121 is 1 to 2mm, but is not limited thereto.

In some embodiments, the material of the conditioning unit 200 is made of a material having sound absorbing properties. For example, the adjusting monomer 200 is at least one selected from PU foam, PE foam, special rubber foam, melamine (melamine) foam, glass fiber foam, rock wool (rockwool), OFAN polyester fiber sound absorbing cotton, melamine sound absorbing cotton, or activated carbon.

In this embodiment, the first loop pipe 110 has a cylindrical structure, and the adjustment unit 200 has a cylindrical structure. The tuning body 200 conforms to the first loop pipe 110, meaning that the diameter of the tuning body 200 is substantially equal to the inner diameter 110D of the first loop pipe 110.

The shapes of the cross sections of the first loop pipe 110 and the tuning body 200 of the present disclosure are not limited to a circular shape. For example, in other embodiments, the first loop pipe 110 may be a rectangular cylindrical structure, and the adjusting unit 200 is correspondingly a rectangular cylindrical structure, wherein the cross sections of both are rectangular.

In this embodiment, the speaker module 100 of the speaker device 50R has the same structure as the speaker module 100 of the speaker device 50L, so the speaker module 100 of the speaker device 50R will not be described here again. However, as shown in fig. 1, since the surrounding space of the speaker device 50R is different from that of the speaker device 50L, the configuration of the first loop pipe 110 in the speaker device 50R is also different.

For example, in order to correspond to the shape of the gap between the third electronic component 16 and the fifth electronic component 18, the length of the first segment SG21 of the speaker apparatus 50R is smaller than the length of the first segment SG11 of the speaker apparatus 50L, the length of the second segment SG22 of the speaker apparatus 50R is larger than the length of the second segment SG12 of the speaker apparatus 50L, and the length of the first segment SG21 of the first loop pipe 110 of the speaker apparatus 50R is smaller than the length of the second segment SG 22.

Based on the design of the first loop pipe 110 and the adjusting unit 200 of this embodiment, the bass effect of the original speaker module 100 can be significantly enhanced. Specifically, please refer to the helmholtz formula listed below:

where C is the speed of sound, S is the cross-sectional area of the first loop tube 110, V is the volume of the acoustic cavity (e.g., the main acoustic cavity 1021), and L is the length of the first loop tube 110.

As shown in this formula, as L becomes longer, the resonance frequency f decreases. Since the main sound chamber 1021 of this embodiment is connected to the first loop pipe 110, i.e., L in the formula increases, the output effect of low frequency can be enhanced. In addition, when C decreases, the resonance frequency f also decreases. Specifically, adjusting the monomer 200 reduces the sound velocity in the first loop pipe 110, so that the output effect of low frequency can be further enhanced.

In addition, since the first loop pipe 110 is made of soft material, the bending mode can be adjusted according to the configuration in the host module 12. Based on the design, not only the low-frequency output effect can be enhanced, but also the whole thinning purpose of the electronic device can be achieved.

Next, referring to fig. 3 and 4, fig. 3 is a schematic diagram of a part of an electronic device 10 according to another embodiment of the disclosure, and fig. 4 is a schematic perspective view of a speaker device 50L according to another embodiment of the disclosure. In this embodiment, the speaker device 50L further includes a first expansion unit 150 corresponding to the shape of at least one internal component of the electronic device 10, and the second end 112 of the first loop pipe 110 is connected to the first expansion unit 150.

Specifically, as shown in fig. 3, in order to correspond to the shapes of the second electronic component 15 and the third electronic component 16, the first expansion unit 150 may be rectangular when viewed along the Z axis, and the width of the first expansion unit in the X axis is smaller than a gap GP1 between the second electronic component 15 and the third electronic component 16.

Furthermore, as shown in fig. 4, the first expansion unit 150 may form a closed first sub-sound chamber 1501, which is connected to the first loop tube 110 and the main sound chamber 1021 through the second opening 1121 of the second end 112. Therefore, the first sub-sound chamber 1501 and the main sound chamber 1021 together form a larger sound chamber, so that the low-frequency sound output effect of the speaker device 50L can be improved.

In this embodiment, the first expansion unit 150 is made of metal material. For example, the first expansion unit 150 may be made of copper, iron, or stainless steel. Based on such a design, the low-frequency sound output effect of the speaker device 50L can be further improved.

Additionally, in some embodiments, the first secondary acoustic chamber 1501 may be filled with a porous material 155. The porous material 155 may be at least one of zeolite powder and activated carbon, for example. After the first sub-sound chamber 1501 is filled with the porous material 155, the moving velocity of air molecules in the first sub-sound chamber 1501 is reduced, that is, the sound velocity in the helmholtz formula is reduced, so that the resonance frequency is reduced, and the sound pressure level (sound pressure level, SPL) at low frequencies is increased.

Notably, in the present disclosure, to ensure tightness, the junction of the first end 111 and the housing 102 is sealed by a sealing element 157. Among them, the sealing member 157 may be made of silicone (silicone), but is not limited thereto.

For example, the sealing element 157 may also be a sealing ring. Similarly, the connection between the second end 112 and the first expansion cell 150 may also be sealed by another sealing element 157.

In addition, as shown in fig. 3, unlike the first expansion unit 150, the first expansion unit 160 is a recyclable and inflatable bag. For example, the first expansion unit 160 is a bag made of plastic material, and can expand corresponding to the shapes of the fifth electronic component 18 and the third electronic component 16.

Therefore, the first extension unit 160 may have a larger first sub-sound cavity 1601, so that the speaker device 50R may achieve a better low-frequency sound output effect.

Next, referring to fig. 5, fig. 5 is a diagram showing a frequency-sound pressure level relationship of a speaker device according to various embodiments of the present disclosure and a conventional speaker device. As shown in fig. 5, a curve CV01 represents a sound pressure level curve of a known speaker apparatus at different frequencies, and curves CV11, CV21, CV31 represent sound pressure level curves of the speaker apparatus of the present disclosure at different frequencies.

Wherein the speaker device corresponding to the curve CV11 has a first loop pipe 110 having a pipe length of 50mm and a pipe inner diameter of 2mm, the speaker device corresponding to the curve CV21 has a first loop pipe 110 having a pipe length of 100mm and a pipe inner diameter of 3.2mm, and the first loop pipe 110 is connected to a first expansion cell 150 having an inner volume of 0.5 cc. Further, the speaker device corresponding to the curve CV31 has a first loop pipe 110 having a pipe length of 100mm and a pipe inner diameter of 3.2mm, and the first loop pipe 110 is connected to a first expansion cell 150 having an inner volume of 6.2 cc.

As can be seen from fig. 5, in the frequency range of 400Hz to 1000Hz, the sound pressure level obtained by the speaker device of the present disclosure is higher than that obtained by the known speaker device, that is, the speaker device of the present disclosure can produce better sound output effect at low frequency.

Referring to fig. 6, fig. 6 is a graph showing a frequency versus impedance relationship of a speaker device according to various embodiments of the present disclosure and the conventional speaker device. As shown in fig. 6, the curve CV02 represents the impedance curves of the known speaker apparatus at different frequencies, and the curves CV12, CV22, CV32 represent the impedance curves of the speaker apparatus of the present disclosure at different frequencies.

Here, the curve CV12 corresponds to the same speaker device as the curve CV11, the curve CV22 corresponds to the same speaker device as the curve CV21, and the curve CV32 corresponds to the same speaker device as the curve CV 31.

As can be seen from fig. 6, the impedance of the speaker apparatus of the present disclosure is higher than that of the known speaker apparatus in the range of 400Hz to 1000Hz, that is, the speaker apparatus of the present disclosure can produce a better sound output effect at low frequencies.

Referring to fig. 7 and 8, fig. 7 shows a frequency versus sound pressure level diagram of a speaker device according to another embodiment of the present disclosure and a known speaker device, and fig. 8 shows a frequency versus impedance diagram of a speaker device according to another embodiment of the present disclosure and a known speaker device.

Wherein the speaker device corresponding to the curve CV41 has a tube length of 10.5mm and a cross-sectional area of 2 x 2mm ² Is provided for the first loop pipe 110. As can be seen from fig. 7, in the frequency range from 400Hz to 1000Hz, as long as the length of the first loop pipe 110 is greater than 10mm, the sound pressure level obtained by the speaker device of the present disclosure can be higher than that obtained by the known speaker device, so as to generate better bass output effect.

It should be noted that, in fig. 7, although the sound pressure level of the curve CV41 in the range of 100Hz to 400Hz is smaller than that of the curve CV01, the sound of this frequency is hardly perceived by the human ear, and therefore the low-frequency sound output effect of the speaker device of the present disclosure is not affected.

In fig. 8, a curve CV42 corresponds to the same speaker device as a curve CV 41. As such, as can be seen from fig. 8, the impedance of the speaker apparatus of the present disclosure is higher at low frequencies than that of the known speaker apparatus, that is, the speaker apparatus of the present disclosure can produce a better sound output effect at low frequencies.

Next, referring to fig. 9 and 10, fig. 9 is a schematic diagram of a part of an electronic device 10 according to another embodiment of the disclosure, and fig. 10 is a schematic perspective view of a speaker device 50L according to another embodiment of the disclosure. In this embodiment, the speaker device 50L further includes a second loop 130 and a second expansion unit 170.

Specifically, the second loop pipe 130 is connected between the first expansion unit 150 and the second expansion unit 170, so that a second sub-sound chamber 1701 formed by the second expansion unit 170 is communicated with the first sub-sound chamber 1501 and the main sound chamber 1021 through the second loop pipe 130.

Similar to the first expansion unit 150, the second expansion unit 170 may be made of a metal material or a plastic material with elasticity, and the junction between the second loop pipe 130 and the second expansion unit 170 and the junction between the second loop pipe 130 and the first expansion unit 150 may be sealed by two sealing elements 157.

Since the closed second sub-sound chamber 1701 formed by the first expansion unit 150 can be communicated with the first sub-sound chamber 1501 and the main sound chamber 1021, the first sub-sound chamber 1501, the second sub-sound chamber 1701 and the main sound chamber 1021 can jointly form a larger sound chamber, so that the low-frequency sound output effect of the speaker device 50L can be improved.

In summary, the present disclosure provides a speaker device, which includes a speaker module 100 and a first loop pipe 110. The first end 111 of the first loop tube 110 is connected to the housing 102 of the speaker module 100, and the second end 112 of the first loop tube 110 is a free end without being closed, and has a second opening 1121, so that the main sound cavity 1021 formed by the housing 102 is communicated with the outside air. Based on such a design, the low-frequency sound output effect of the speaker device can be effectively improved.

Additionally, in some embodiments, the speaker apparatus may further comprise at least one expansion cell connected to the speaker module 100 through at least one loop pipe. The secondary sound cavity formed by the expansion unit and the main sound cavity 1021 of the speaker module 100 can form a larger sound cavity together, so that the low-frequency sound output effect of the speaker device can be further improved.

Furthermore, in some embodiments, a conditioning unit 200 may be disposed within the loop and/or the expansion unit may be filled with the porous material 155. Such a design would reduce the moving velocity of the air molecules so that the resonance frequency would be reduced, and thus the sound pressure level of the low frequency would be increased.

Although embodiments of the present disclosure and their advantages have been disclosed above, it should be understood that those skilled in the art may make alterations, substitutions and modifications without departing from the spirit and scope of the present disclosure. Furthermore, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, and those of skill in the art will appreciate from the present disclosure that any process, machine, manufacture, composition of matter, means, methods and steps which may be practiced in the present disclosure or with respect to the presently existing or future developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein. Accordingly, the scope of the present disclosure includes such processes, machines, manufacture, compositions of matter, means, methods, or steps. In addition, each claim constitutes a separate embodiment, and the scope of protection of the present disclosure also includes combinations of the individual claims and embodiments.

Claims (10)

1. A speaker device mounted to an electronic device, the speaker device comprising:

a speaker module, having:

a shell with a main sound cavity and a sound outlet; and

the loudspeaker unit is arranged in the shell and comprises a vibrating diaphragm which is communicated with the sound outlet; and

the first loop pipe is provided with a first end and a second end, and the first end is connected with the shell;

wherein the length of the first loop pipe is at least 10mm, and the inner diameter of the first loop pipe is at least 2mm.

2. The speaker device as claimed in claim 1, wherein the first end has a first opening communicating with the main sound cavity, and the second end has a second opening communicating with a receiving space of the electronic device.

3. The speaker device as claimed in claim 2, wherein the housing has a rectangular structure, and the first loop tube has a first section and a second section, the first and second ends are respectively located at the first and second sections, the first section is parallel and adjacent to a first side of the rectangular structure, and the second section is parallel and adjacent to a second side of the rectangular structure.

4. The speaker device as claimed in claim 2, wherein the speaker device further comprises a regulating unit disposed in the first loop pipe, and the regulating unit is disposed adjacent to the second opening.

5. The speaker device as claimed in claim 1, wherein the speaker device further comprises a first extension unit corresponding to a shape of at least one internal element of the electronic device, the second end of the first loop pipe is connected to the first extension unit, and a first sub-sound cavity formed by the first extension unit is connected to the first loop pipe and the main sound cavity through the second end.

6. The speaker device as claimed in claim 5, wherein the first extension unit is made of metal material.

7. The speaker device as claimed in claim 5, wherein the first sub-sound chamber is filled with a porous material comprising at least one of zeolite powder and activated carbon.

8. The speaker device as in claim 5, wherein the junction of the first end and the housing is sealed by a sealing element and the junction of the second end and the first extension piece is sealed by another sealing element, wherein a plurality of the sealing elements comprise silicone or a sealing ring.

9. The speaker device as in claim 5, wherein the first expansion unit is a recyclable and inflatable bag.

10. The speaker device as claimed in claim 5, wherein the speaker device further comprises a second loop pipe and a second extension unit, the second loop pipe is connected between the first extension unit and the second extension unit, so that a second sub-sound cavity formed by the second extension unit is communicated with the first sub-sound cavity and the main sound cavity through the second loop pipe.