TWM545413U - Speaker having extended low frequency and electronic device using the same - Google Patents

Abstract

A speaker having extended low frequency and an electronic device using the same are provided. The speaker includes a first sound box, a horn, a second sound box and a sound tube. The volume of the first sound box is 0.8 to 1.2 cm3. The horn is disposed in the first sound box. The horn faces the second sound box. The volume of the second box is larger than the volume of the first sound box. The sound tube is connected to the second sound box.

Description

Low frequency extended speaker and electronic device using the same

The present invention relates to a speaker and an electronic device using the same, and in particular to a low frequency extended speaker and an electronic device using the same.

With the advancement of technology, various electronic devices continue to evolve. Many portable electronic devices are equipped with speakers to play music or sound effects. However, in order to respond to the user's demand for convenient carrying of the electronic device, the electronic device is oriented toward thinning, and the internal speaker must also be thinned.

The industry has found that when the speaker is becoming thinner, it seriously affects the bass sound. Even through various attempts, the bass sound can usually only reach 600Hz, and can not express the bass sound below 600Hz, and can not satisfy the user's sense of hearing.

The present invention relates to a low-frequency extended speaker and an electronic device using the same, which utilizes the design of the first speaker, the second speaker and the sound tube, and adopts a thin or miniaturized speaker unit at 600 Hz to 250 Hz. There is still good performance, and the bass sound is extended to 250Hz, which satisfies the user's sense of hearing.

According to a first aspect of the present invention, a speaker is proposed. The speaker includes a first speaker, a speaker unit, a second speaker and a sound tube. The volume of the first speaker is 0.8 to 1.2 cubic centimeters. The speaker unit is disposed in the first speaker. The speaker unit faces the second speaker. The volume of the second speaker is larger than the volume of the first speaker. The sound tube is connected to the second speaker.

According to a first aspect of the present invention, an electronic device is proposed. The electronic device includes a speaker and an audio processing circuit. The speaker includes a first speaker, a speaker unit, a second speaker and a sound tube. The volume of the first speaker is 0.8 to 1.2 cubic centimeters. The speaker unit is disposed in the first speaker. The speaker unit faces the second speaker. The volume of the second speaker is larger than the volume of the first speaker. The sound tube is connected to the second speaker. The sound processing circuit is used to provide an audio signal to the speaker.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

100‧‧‧Electronic devices

110, 210, 310, 410, 510, 610, 710, 810 ‧ ‧ speakers

111, 211, 311, 411, 511, 611, 711, 811‧‧‧ first speaker

111a‧‧‧Outer surface

112, 212, 312, 412, 512, 612, 712, 812‧‧‧ second speaker

112a‧‧‧ Opening

112b‧‧‧ inner surface

113, 213, 313, 413, 613, 713, 813‧‧‧ horn single

113a‧‧‧Vibration membrane

114, 214, 314, 414, 514, 614, 714, 814‧‧ ‧ sound tube

114a‧‧‧ Entrance

114b‧‧‧Export

120‧‧‧Audio processing circuit

390‧‧‧ screw column

C1, C2‧‧‧ frequency curve

L114‧‧‧ length

FIG. 1 is a schematic diagram of an electronic device according to an embodiment.

Figure 2 is a schematic view showing the appearance of the speaker.

Figure 3 is a schematic view showing the internal space of the speaker of Figure 2.

Fig. 4 is a side view showing the speaker of Fig. 2.

Figure 5 is a schematic diagram showing the frequency curve.

FIG. 6 is a schematic diagram of a speaker according to another embodiment.

FIG. 7 is a schematic diagram of a speaker according to another embodiment.

FIG. 8 is a schematic diagram showing the appearance of a speaker according to another embodiment.

Figure 9 is a schematic view showing the internal space of the speaker of Figure 8.

Fig. 10 is a side view showing the speaker of Fig. 8.

11 is a schematic view of a speaker according to another embodiment.

Figure 12 is a schematic illustration of a speaker in accordance with another embodiment.

Figure 13 is a schematic view of a speaker according to another embodiment.

Figure 14 is a schematic illustration of a speaker in accordance with another embodiment.

Please refer to FIG. 1 , which illustrates a schematic diagram of an electronic device 100 according to an embodiment. The electronic device 100 is, for example, a tablet computer, a notebook computer, a smart phone, or a handheld audio device. The electronic device 100 includes a speaker 110 and an audio processing circuit 120. The sound processing circuit 120 is configured to provide an audio signal S0 to the speaker 110. In response to the user's demand for convenient carrying of the electronic device 1000, the electronic device 100 is developed toward thinning, and the internal speaker 110 must also be thinned or miniaturized.

Please refer to FIG. 2 to FIG. 4, FIG. 2 is a schematic diagram showing the appearance of the speaker 110, and FIG. 3 is a schematic diagram showing the internal space of the speaker 110 in FIG. The figure shows a side view of the speaker 110 of Fig. 2. The speaker 110 includes a first speaker 111, a speaker unit 113, a second speaker 112, and a sound tube 114. In order to meet the requirements of the thinning of the speaker 110, the length of the horn unit 113 is 1.5 to 2.6 cm, the length of the horn unit 113 is 0.8 to 1.1 cm, and the thickness of the horn unit 113 is 0.2 to 0.4 cm. In one embodiment, the length, width, and thickness of the horn unit 113 are 1.6 cm, 0.9 cm, and 0.3 cm, respectively.

As shown in Fig. 4, the first speaker 111 is a closed type speaker. The volume of the first speaker 111 is 0.8 to 1.2 cubic centimeters, for example, 1 cubic centimeter. The speaker unit 113 is disposed in the first speaker 111. The diaphragm 113a of one of the horn units 113 is disposed on the outer surface 111a of the first speaker 111. The speaker unit 113 transmits the resonance of the first speaker 111 to expand the sound range of the sound effect. However, since the horn unit 113 is small, even with the resonance of the first speaker 111, the bass sound effect can usually only reach 600 Hz, and the bass sound effect below 600 Hz cannot be exhibited.

As shown in FIG. 3, the horn unit 113 faces the second speaker 112. The sound tube 114 is connected to one of the openings 112a of the second speaker 112. The second speaker 112 is an open speaker. The volume of the second speaker 112 is larger than the volume of the first speaker 111. It has been experimentally found that when the ratio of the volume of the second speaker 112 to the first speaker 111 is greater than 3.75, the bass sound effect below 600 Hz can be exhibited. As shown in FIG. 4, the speaker unit 113 is disposed at the junction of the first speaker 111 and the second speaker 112. The diaphragm 113a of the horn unit 113 is disposed on one inner surface 112b of the second speaker 112.

The second speaker 112 and the sound tube 114 pass the Helmholtz principle to effectively extend the bass sound to a lower frequency range. Please refer to the following formula (1). The structural design of the second speaker 112 and the sound guiding tube 114 can be arranged according to the following formula (1):

Where f is the frequency, V _s is the propagation rate of the acoustic wave, π is the pi, A is the cross-sectional area of the sound tube 114, V is the volume of the second speaker 112, and L is the length of the sound tube 114 (for example, Figure 3) The length of L114).

That is, in order to enable the speaker 110 to provide a bass sound wave having a frequency lower than 600 Hz, the length of the sound guiding tube 114 is designed to be negatively correlated with the frequency of the bass sound wave, and the cross-sectional area of the sound guiding tube 114 is designed to be the same as the bass sound wave. The frequency is positively correlated and the volume of the second speaker 112 is designed to be inversely related to the frequency of the bass sound waves.

In other words, according to the frequency to be achieved by the bass sound wave, the length of the sound guiding tube 114, the cross-sectional area of the sound guiding tube 114 and the volume of the second speaker 112 can be structurally arranged according to the following formula (2):

The length of the sound tube 114 can be structurally arranged according to the following formula (3):

The cross-sectional area of the sound tube 114 and the volume of the second speaker 112 can be structurally arranged according to the following formula (4):

The volume of the second speaker 112 can be structurally arranged according to the following formula (5):

For example, the volume of the second speaker 112 can be designed to be 8 to 9 cubic centimeters, the length of the sound guiding tube 114 can be designed to be 11 to 13 cm, and the cross-sectional area of the sound guiding tube 114 can be designed to be 0.2 to 0.4 square centimeters. In one embodiment, the volume of the second speaker 112 can be designed to be 8.9 cubic centimeters, the length of the sound guiding tube 114 can be designed to be 1.242 cm, and the length and width of the cross-sectional area of the sound guiding tube 114 can be designed to be 0.59 cm and 0.6 cm. .

In an embodiment, the sound guide tube 114 can employ a uniform cross-sectional area to achieve a better acoustic wave derivation effect. That is, as shown in FIG. 3, the cross-sectional area of the sound guiding tube 114 is substantially the same from the inlet 114a of the sound guiding tube 114 to the outlet 114b of the sound guiding tube 114.

In one embodiment, as shown in FIG. 3, in order to allow the speaker 110 to occupy no excessive space, the sound guide tube 114 can be designed in a curved S shape through a plurality of partition plates. Alternatively, the sound tube 114 can also be designed in a U shape.

Please refer to FIG. 5, which shows a schematic diagram of frequency curves C1 and C2. When the horn unit 113 resonates only by a single speaker, the frequency curve C1 is measured. When the speaker unit 113 resonates by the first speaker 111 and conducts sound by the second speaker 112 and the sound tube 114, the frequency curve C2 is measured. As shown by the frequency curve C1, the bass sound can only reach 600 Hz, and it cannot express the bass sound below 600 Hz. As shown by the frequency curve C2, the bass sound is in the range of 600Hz~250Hz. There is still a good performance, which makes the bass efficiency extend to 250Hz, thus satisfying the user's sense of hearing.

Please refer to FIG. 6 , which illustrates a schematic diagram of a speaker 610 according to another embodiment. In this embodiment, the speaker unit 613 and the sound guiding tube 614 of the speaker 610 are similar to the speaker unit 113 and the sound guiding tube 114 of FIG. 4, and the description thereof will not be repeated here. The second speaker 612 is a rectangular square body, and the first speaker 611 protrudes out of the second speaker 611 to make the second speaker 612 convenient to manufacture. It has been experimentally proved that the embodiment of the embodiment can also effectively achieve the effect of the bass.

Please refer to FIG. 7 , which illustrates a schematic diagram of a speaker 710 according to another embodiment. In this embodiment, the speaker unit 713 and the sound tube 714 of the speaker 710 are similar to the speaker unit 113 and the sound tube 114 of FIG. 4, and the description thereof will not be repeated here. The first speaker 711 is embedded in the second speaker 712. It has been experimentally proved that the embodiment of the embodiment can also effectively achieve the effect of the bass.

Please refer to FIG. 8 to FIG. 8 , FIG. 8 is a schematic diagram of the appearance of the speaker 810 according to another embodiment, FIG. 9 is a schematic diagram showing the internal space of the speaker 810 of FIG. 8 , and FIG. 10 is a diagram of FIG. A schematic view of the side of the speaker 810. In this embodiment, the second speaker 812, the speaker unit 813, and the sound tube 814 of the speaker 810 are similar to the second speaker 112, the speaker unit 113, and the sound tube 114 of FIG. 4, and the description thereof will not be repeated here. . The first speaker 811 extends rearward. It has been experimentally proved that the embodiment of the embodiment can also effectively achieve the effect of the bass.

Please refer to FIG. 11 , which illustrates a schematic diagram of a speaker 210 according to another embodiment. In this embodiment, the first speaker 211, the second of the speaker 210 The speaker 212 and the speaker unit 213 are similar to the first speaker 111, the second speaker 112, and the speaker unit 113 of FIG. 8, and the description thereof will not be repeated here. The sound tube 214 of the speaker 210 can extend along the edges of the second speaker 212 and the first speaker 211 to reduce the overall length of the speaker 210.

Please refer to FIG. 12, which illustrates a schematic diagram of a speaker 310 according to another embodiment. In this embodiment, the first speaker 311, the second speaker 312, and the speaker unit 313 of the speaker 310 are similar to the first speaker 111, the second speaker 112, and the speaker unit 113 of FIG. 8, and the description thereof will not be repeated here. . The sound tube 314 of the speaker 310 can avoid the screw post 390 (or other various components) and extend along the edge of the screw post 390 to meet the structural design requirements.

Please refer to FIG. 13 , which illustrates a schematic diagram of a speaker 410 according to another embodiment. In this embodiment, the first speaker 411, the second speaker 412, and the sound tube 414 of the speaker 410 are sequentially stacked. The speaker unit 413 is disposed at a junction of the first speaker 411 and the second speaker 412. The first speaker 411, the second speaker 412, and the sound tube 414 are disposed in a stacked manner to effectively reduce the overall length of the speaker 410.

Please refer to FIG. 14 , which illustrates a schematic diagram of a speaker 510 according to another embodiment. In this embodiment, the first speaker 511 and the second speaker 512 of the speaker 510 are not limited to a rectangular parallelepiped or a cube, and the first speaker 511 and the second speaker 512 may adopt a circular (or elliptical) cylinder. The second speaker 512 is stacked on top of the first speaker 511. The sound tube 514 extends along the edges of the first speaker 511 and the second speaker 512 such that the speaker 510 substantially forms a circular (or elliptical) cylinder.

According to the above embodiment, when the speaker is thinned or miniaturized, the speaker can be designed through the first speaker, the second speaker and the sound tube, so that the bass sound still has a good performance at 600 Hz to 250 Hz. Extend the bass efficiency to 250Hz to satisfy the user's sense of hearing.

In summary, although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention. Those who have ordinary knowledge in the technical field of the present invention can make various changes and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application.

110‧‧‧Speakers

111‧‧‧First speaker

112‧‧‧Second speaker

112a‧‧‧ Opening

113‧‧‧ horn monomer

114‧‧‧Guide tube

114a‧‧‧ Entrance

114b‧‧‧Export

L114‧‧‧ length

Claims (32)

A speaker includes: a first speaker, the first speaker has a volume of 0.8 to 1.2 cubic centimeters; a speaker unit is disposed in the first speaker; and a second speaker, the speaker unit faces the second speaker The speaker, the volume of the second speaker is larger than the volume of the first speaker; and a sound guiding tube is connected to the second speaker. The speaker of claim 1, wherein the first speaker has a volume of 1 cubic centimeter. The speaker of claim 1, wherein the ratio of the volume of the second speaker to the first speaker is greater than 3.75. The speaker of claim 1, wherein the first speaker is a closed speaker. The speaker of claim 1, wherein the second speaker is an open speaker. The speaker of claim 1, wherein the sound guiding tube is connected to one of the openings of the second speaker. The speaker of claim 1, wherein the speaker unit is disposed at a junction of the first speaker and the second speaker. The speaker according to claim 1, wherein the speaker is configured to provide a bass sound wave, and one of the bass sound waves has a frequency between 600 Hz and 250 Hz, and a length of the sound tube and the frequency of the bass sound wave. Negative correlation. The speaker of claim 1, wherein the speaker is configured to provide a bass sound wave, and one of the bass sound waves has a frequency between 600 Hz and 250 Hz, and a cross-sectional area of the sound tube and the bass sound wave are The frequency is positively correlated. The speaker according to claim 1, wherein the speaker is configured to provide a bass sound wave, and one of the bass sound waves has a frequency between 600 Hz and 250 Hz, and a volume of the second speaker and the frequency of the bass sound wave. Negative correlation. The speaker of claim 1, wherein the sound guiding tube has a uniform cross-sectional area. The speaker of claim 1, wherein the sound guiding tube is curved. The speaker of claim 12, wherein the sound guiding tube is S-shaped. The speaker according to claim 1, wherein the speaker unit has a diaphragm, and the diaphragm is disposed on an inner surface of the second speaker. The speaker according to claim 1, wherein the second speaker has a volume of 8 to 10 cubic centimeters, the length of the sound guiding tube is 11 to 13 cm, and the cross section of the sound guiding tube is 0.2. ~0.4 square centimeters. The speaker according to claim 1, wherein one of the speaker units has a length of 1.5 to 2.6 cm, the width of the speaker unit is 0.8 to 1.1 cm, and the thickness of the speaker unit is 0.2~. 0.4 cm. An electronic device comprising: a speaker comprising: a first speaker, the volume of the first speaker is 0.8~1.2 cubic centimeters; a speaker unit is disposed in the first speaker; a second speaker, the speaker unit faces the second speaker, the second speaker The volume of the speaker is larger than the volume of the first speaker; and a sound guiding tube is connected to the second speaker; and an audio processing circuit is configured to provide an audio signal to the speaker. The electronic device of claim 17, wherein the first speaker has a volume of 1 cubic centimeter. The electronic device of claim 17, wherein the ratio of the volume of the second speaker to the first speaker is greater than 3.75. The electronic device of claim 17, wherein the first speaker is a closed speaker. The electronic device of claim 17, wherein the second speaker is an open speaker. The electronic device of claim 17, wherein the sound guiding tube is connected to one of the openings of the second speaker. The electronic device of claim 17, wherein the speaker unit is disposed at a junction of the first speaker and the second speaker. The electronic device of claim 17, wherein the speaker is configured to provide a bass sound wave, and one of the bass sound waves has a frequency between 600 Hz and 250 Hz, and a length of the sound tube and the bass sound wave are The frequency is negatively correlated. The electronic device of claim 17, wherein the speaker is configured to provide a bass sound wave, and one of the bass sound waves has a frequency between 600 Hz and 250 Hz, and a cross-sectional area of the sound tube and the bass sound wave This frequency is positively correlated. The electronic device of claim 17, wherein the speaker is configured to provide a bass sound wave, and one of the bass sound waves has a frequency between 600 Hz and 250 Hz, and the volume of the second speaker is the same as the bass sound wave. The frequency is negatively correlated. The electronic device of claim 17, wherein the sound guiding tube has a uniform cross-sectional area. The electronic device of claim 17, wherein the sound guiding tube is curved. The electronic device of claim 28, wherein the sound guiding tube is S-shaped. The electronic device of claim 17, wherein the speaker unit has a diaphragm, and the diaphragm is disposed on an inner surface of the second speaker. The electronic device of claim 17, wherein the second speaker has a volume of 8 to 10 cubic centimeters, and the length of the sound guiding tube is 11 to 13 cm, and the cross-sectional area of the sound guiding tube is 0.2~0.4 square centimeters. The electronic device of claim 17, wherein one of the speaker units has a length of 1.5 to 2.6 cm, the width of the speaker unit is 0.8 to 1.1 cm, and the thickness of the speaker unit is 0.2. ~0.4 cm.