Audio playback device

Abstract

The present invention discloses an audio player device, the audio player device comprises a main body component, two treble structures and a support box component, the main body component comprises a front panel and a rear panel arranged at intervals, the left edge, the bottom edge and the right edge of the front panel are all provided with a sound-emitting structure for emitting sound to the front, the sound-emitting structure is a sound-emitting gap and / or a sound-emitting hole array; the treble structure comprises a treble front cavity, a treble rear cavity and a speaker array formed between the front panel and the rear panel, the sound-emitting surface of the speaker array is arranged toward the rear panel, the sound-emitting structure on the left side is connected with the treble front cavity on the left side, and the sound-emitting structure on the right side is connected with the treble front cavity on the right side; the support box component and the main body component jointly form a bass structure, and the bass structure is connected with the sound-emitting structure on the bottom side. The present invention has the advantages of improving the treble directivity and enhancing the bass expressiveness.

Description

Technical Field

[0001] The present invention relates to the technical field of audio playback, and in particular to an audio playback device. Background Art

[0002] At present, due to the pursuit of lightness and thinness of electronic devices such as electronic photo frames and tablet computers, the acoustic systems of electronic devices all emit sound to the sides or rear sides of the electronic devices. The electronic devices cannot emit sound to the front side, that is, the user side, resulting in poor directivity of the high-frequency sounds emitted by the electronic devices. At the same time, the low-frequency effect of the electronic devices in the prior art is also poor. Summary of the invention

[0003] The main purpose of the present invention is to provide an audio playback device, aiming to solve the problem of poor treble directionality and bass effect emitted by electronic devices in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention proposes an audio playback device, which includes: a main body component, the main body component includes a front panel and a rear panel arranged at intervals, the left edge, bottom edge and right edge of the front panel are all provided with a sound-emitting structure for emitting sound to the front, and the sound-emitting structure is a sound-emitting gap and / or a sound-emitting hole array; two tweeter structures, each of the tweeter structures includes a tweeter front cavity, a tweeter rear cavity and a speaker array formed between the front panel and the rear panel, the speaker array separates the tweeter front cavity and the tweeter rear cavity, and the sound-emitting surface of the speaker array is arranged toward the rear panel, the sound-emitting structure on the left side is connected to the tweeter front cavity on the left side, and the sound-emitting structure on the right side is connected to the tweeter front cavity on the right side; a support box component, the support box component is connected to the rear panel, and the support box component and the main body component together form a bass structure, and the bass structure is connected to the sound-emitting structure on the bottom side.

[0005] Furthermore, the main body component also includes a side panel, which extends from the edge of the rear panel to the front panel; the side panel and the front panel are spaced apart to form the sound gap, or the side panel is connected to the front panel, and the sound hole array is opened on the left edge, bottom edge and right edge of the front panel.

[0006] Furthermore, the tweeter structure also includes: a first baffle, which extends from the front panel to an end of the speaker array close to the side panel, and the first baffle is spaced apart from the side panel; a second baffle, which extends from the rear panel to an end of the speaker array away from the side panel; wherein the first baffle, the sound-emitting surface of the speaker array, the second baffle, the rear panel, and the side panel together form a tweeter front cavity of the speaker array, and the back of the speaker array and the first baffle, the front panel, the rear panel, and the second baffle together form a tweeter rear cavity of the speaker array.

[0007] Furthermore, the width of the sound outlet gap is greater than or equal to 2 mm, the sound outlet hole array includes a plurality of sound outlet holes arranged in an array, and the diameter of the sound outlet holes is greater than or equal to 2 mm; the gap between the sound emitting surface of the speaker array and the rear panel is greater than or equal to 2 mm; the gap between the front panel and the rear panel is between 4.5 mm and 5 mm.

[0008] Furthermore, the sound emitting structure on the left side of the front panel covers the entire left edge of the front panel, and the sound emitting structure on the right side of the front panel covers the entire right edge of the front panel.

[0009] Further, the support box assembly includes a box body, a partition is provided in the box body to divide the internal space of the box body into a bass front cavity and a bass rear cavity, a bass speaker is provided on the partition, the bass speaker passes through the partition and the sound-emitting surface of the bass speaker faces the bass front cavity; three bass reflex ports are opened on the rear panel, the three bass reflex ports are connected with the bass front cavity, three bass reflex tube channels are formed between the rear panel and the front panel, each of the bass reflex tube channels connects each of the bass reflex ports with the sound outlet structure on the bottom side.

[0010] Furthermore, the opening sizes of the three bass reflex ports are equal; the sum of the opening sizes of the three bass reflex ports is equal to the opening size of the bass reflex pipe of an equivalent bandpass bass acoustic system; the bass reflex pipe channel comprises an equal-width section and a widened section, the equal-width section connects the bass reflex ports and the widened section, and the length of the equal-width section is equal to 1-1.5 times the opening size of the bass reflex port; the length of the widened section is equal to 1-2.25 times the opening size of the bass reflex port; the opening widths of the two bass reflex pipe channels on both sides are equal, and the opening widths of the bass reflex pipe channels on both sides are 2-3 times the opening width of the middle bass reflex pipe channel.

[0011] Furthermore, the sound outlet structure on the bottom side covers the bottom edge of the front panel and is divided into three sound outlet sections, and the three inverted tube channels are connected to the three sound outlet sections in a one-to-one correspondence.

[0012] Furthermore, the number of the woofers is two, a woofer interface is provided on the inner wall of the support box, and the woofer is electrically connected to the woofer interface.

[0013] Furthermore, the audio playback device is a speaker, an electronic photo frame or a tablet computer. When the audio playback device is an electronic photo frame or a tablet computer, the front panel is a printed circuit board, and a display panel is arranged on the printed circuit board.

[0014] In the technical solution of the present invention, the sound outlet structure is provided on the left edge, the right edge and the front edge of the front panel, and the sound outlet structure may be a sound outlet slit or a sound outlet hole array. The two tweeter structures are respectively connected to the sound outlet structures on the left and right sides, and the left channel and right channel tweeter audio are emitted to the front of the front panel, i.e., the user's position, through the sound outlet structure, thereby improving the directivity of the high-frequency sound; and the sound outlet surface of the speaker array is arranged toward the rear panel, and the tweeter structure adopts a reflective transmission guide structure acoustic design, thereby improving the sound pressure; and the sound outlet slit and the sound outlet hole array only occupy an extremely narrow area on the front panel, thereby improving the aesthetics of the audio playback device; the support box assembly and the main body assembly jointly form a bass structure, which is conducive to low-frequency dive, thereby improving the low-frequency expression of the audio playback device, and enhancing the practicality of the audio playback device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the audio playback device of the present invention;

[0017] Figure 2 It is a structural schematic diagram of an embodiment of the main body assembly of the present invention;

[0018] Figure 3 It is a structural schematic diagram of another embodiment of the main body assembly of the present invention;

[0019] Figure 4 A schematic diagram of a cross-sectional structure of an embodiment of the main assembly of the present invention

[0020] Figure 5 A schematic diagram of the sound field distribution of an embodiment of the main assembly of the present invention;

[0021] Figure 6It is a structural schematic diagram of the support box assembly of the present invention;

[0022] Figure 7 It is an equivalent schematic diagram of the bass structure of the present invention and the bandpass bass acoustic system.

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] Please also read Figure 1-4The present invention provides an audio playback device 100, the audio playback device 100 comprising: a main body component 10, the main body component 10 comprising a front panel 101 and a rear panel 102 arranged at intervals, the left edge, the bottom edge and the right edge of the front panel 101 are all provided with a sound outlet structure 11 for emitting sound to the front, the sound outlet structure 11 is a sound outlet gap 111 and / or a sound outlet hole array (not shown); two tweeter structures 12, each of the tweeter structures 12 comprising a tweeter front cavity 121, a tweeter rear cavity 122 and a tweeter back cavity 123 formed between the front panel 101 and the rear panel 102. and a speaker array 123, the speaker array 123 separates the tweeter front cavity 121 and the tweeter rear cavity 122, and the sound-emitting surface of the speaker array 123 is arranged toward the rear panel 102, the sound-emitting structure 11 on the left side is connected with the tweeter front cavity 121 on the left side, and the sound-emitting structure 11 on the right side is connected with the tweeter front cavity 121 on the right side; a support box assembly 20, the support box assembly 20 is connected to the rear panel 102, and the support box assembly 20 and the main body assembly 10 together form a bass structure, and the bass structure is connected with the sound-emitting structure 11 on the bottom side.

[0028] In this embodiment, the audio playback device 100 can be an electronic product such as a speaker, an electronic photo frame (also known as a digital photo album) and a tablet computer, but is not limited to the above electronic products. The audio playback device 100 includes a main body component 10, and the main body component 10 is used to form a sound structure 11 for emitting sound forward, that is, emitting sound to one side of the user, and two tweeter structures 12 for forming left and right channels. At the same time, the main body component 10 is also used to cooperate with the support box structure 20 to form a bass structure. Specifically, the main body component 10 includes a front panel 101 and a rear panel 102, and the front panel 101 and the rear panel 102 are arranged at intervals. The front panel 101 faces the user. Therefore, the sound structure 11 is opened on the left edge, right edge and bottom edge of the front panel 101, and the sound is transmitted to the user through the sound structure 11 to improve the directivity of the sound. It can be understood that the sound structure 11 can also be opened on the top edge of the front panel 101. Furthermore, the sound outlet structure 11 is a sound outlet slit 111 and / or a sound outlet hole array, and the sound outlet slit 111 and the sound outlet hole array only occupy a very narrow area on the front panel 101 , which can improve the aesthetics of the audio playback device 100 .

[0029] In this embodiment, the two tweeter structures 12 are respectively formed on the left and right sides of the main body component 10, and respectively serve as the left channel tweeter structure 12 and the right channel tweeter structure 12 of the audio playback device 100. Specifically, each tweeter structure 12 includes a tweeter front cavity 121, a tweeter rear cavity 122 and a speaker array 123. The speaker array 123 separates the tweeter front cavity 121 from the tweeter rear cavity 122. In this embodiment, the sound pressure can be increased by setting the sound source as the speaker array 123, and the sound-emitting surface of the speaker array 123 is set toward the rear panel 102, and a tweeter is formed between the sound-emitting surface of the speaker array 123 and the rear panel 102. The front cavity 121 can further increase the sound pressure of the speaker array 123, increase the sound volume, and reduce the thickness of the main body component 10. Furthermore, the sound-emitting structure 11 on the left is connected with the tweeter front cavity 121 on the left, so that the audio emitted by the speaker array 123 on the left is transmitted to the front of the front panel 101 through the tweeter front cavity 121 on the left and the sound-emitting structure 11 on the left; at the same time, the sound-emitting structure 11 on the right is connected with the tweeter front cavity 121 on the right, so that the audio emitted by the speaker array 123 on the right is transmitted to the front of the front panel 101 through the tweeter front cavity 121 on the right and the sound-emitting structure 11 on the right.

[0030] In this embodiment, the support box assembly 20 is arranged on the back of the main body assembly 10, that is, the support box assembly 20 is connected to the rear panel 102. On the one hand, the support box assembly 20 can support the main body assembly 10 to ensure the stability of the audio playback device 100 when placed. On the other hand, the support box assembly 20 and the main body assembly 10 jointly form a bass structure, which is conducive to low-frequency diving and improves the low-frequency expression of the audio playback device 100. The bass structure is connected to the sound outlet structure 11 on the bottom side, and the low frequency is transmitted to the front of the front panel 101 through the sound outlet structure 11 on the bottom side.

[0031] In summary, in this embodiment, the sound outlet structure 11 is provided on the left edge, the right edge and the front edge of the front panel 101, and the sound outlet structure 11 may be a sound outlet slit 111 or a sound outlet hole array. The two tweeter structures 12 are respectively connected to the left and right sound outlet structures 11, and the left and right channel tweeter audio are emitted to the front of the front panel, that is, the user's position, through the sound outlet structure 11, thereby improving the directivity of the high-frequency sound; and the sound outlet surface of the speaker array 123 is arranged toward the rear panel 102, and the tweeter structure 12 adopts a reflective transmission guide structure acoustic design, thereby improving the sound pressure; and the sound outlet slit 111 and the sound outlet hole array only occupy a very narrow area on the front panel 101, thereby improving the aesthetics of the audio playback device 100; the support box assembly 20 and the main body assembly 10 jointly form a bass structure, which is conducive to low-frequency dive, improves the low-frequency expression of the audio playback device 100, and enhances the practicality of the audio playback device 100.

[0032] See also Figure 4 Furthermore, the main body component 10 also includes a side panel 103, which is extended from the edge of the rear panel 102 to the front panel 101; the side panel 103 is spaced apart from the front panel 101 to form the sound outlet gap 111, or the side panel 103 is connected to the front panel 101, and the sound outlet hole array is opened on the left edge, bottom edge and right edge of the front panel 101.

[0033] In this embodiment, the side panel 103 is formed by extending the edge of the rear panel 102 toward the front panel 101. Specifically, at least the left edge, right edge and bottom edge of the rear panel 102 extend out of the side panel 103. In a specific embodiment, the side panel 103 is spaced apart from the front panel 101 to form the sound outlet gap 111. In this case, the length and width of the front panel 101 are smaller than those of the rear panel 102. In another specific embodiment, the side panel 103 is connected to the front panel 101, and the sound outlet hole array is provided on the left edge, bottom edge and right edge of the front panel 101. In this case, the length and width of the front panel 101 are smaller than those of the rear panel 102. It can be understood that the side panel 103 can be integrally formed with the rear panel 102 or can be formed separately.

[0034] See also Figure 4Furthermore, the tweeter structure 12 also includes: a first baffle 124, which extends from the front panel 101 to an end of the speaker array 123 close to the side panel 103, and the first baffle 124 is spaced apart from the side panel 103; a second baffle 125, which extends from the rear panel 102 to an end of the speaker array 123 away from the side panel 103; wherein the first baffle 124, the sound-emitting surface of the speaker array 123, the second baffle 125, the rear panel 102, and the side panel 103 together form a tweeter front cavity 121 of the speaker array 123, and the back of the speaker array 123 and the first baffle 124, the front panel 101, the rear panel 102, and the second baffle 125 together form a tweeter rear cavity 122 of the speaker array 123.

[0035] In this embodiment, the speaker array 123 is arranged between the front panel 101 and the rear panel 102, and there are gaps between the speaker array 123 and the front panel 101 and the rear panel 102. The sound waves generated by the speaker array 123 are reflected by the rear panel 102 and then transmitted from the sound output structure 11, that is, the tweeter structure 12 adopts a reflection transmission guide structure acoustic design; the first baffle 124 extends from the front panel 101 to one end of the speaker array 123 close to the side panel 103. The first baffle 124 is used to support the speaker array 123 on the one hand, and to separate the tweeter front cavity 121 from the tweeter rear cavity 122 on the other hand, and the first baffle 124 is spaced apart from the side panel 103 to form a partial structure of the tweeter front cavity 121; the second baffle 125 extends from the rear panel 101 to the end of the speaker array 123 close to the side panel 103. 02 extends to one end of the speaker array 123 away from the side panel 103, and the second partition plate 125 is used to support the speaker array 123 on the one hand, and to separate the tweeter front cavity 121 from the tweeter rear cavity 122 on the other hand; the first partition plate 124, the sound-emitting surface of the speaker array 123, the second partition plate 125, the rear panel 102, and the side panel 103 together form the tweeter front cavity 121 of the speaker array 123, and the back of the speaker array 123 and the first partition plate 124, the front panel 101, the rear panel 102, and the second partition plate 125 together form the tweeter rear cavity 122 of the speaker array 123. In this way, compared with the way that the speaker array 123 directly emits sound to the side or directly to the back, not only can the sound pressure of the speaker array 123 be increased, but also the overall thickness of the main body component 10 can be reduced.

[0036] See also Figure 4Furthermore, the width L1 of the sound outlet gap 111 is greater than or equal to 2 mm, the sound outlet hole array includes a plurality of sound outlet holes arranged in an array, and the diameter of the sound outlet holes is greater than or equal to 2 mm. In this way, the size of the sound outlet structure 11 can be reduced, making the appearance of the audio playback device 100 more beautiful; the gap L2 between the sound-emitting surface of the speaker array 123 and the rear panel 102, that is, the thickness of the tweeter front cavity, is greater than or equal to 2 mm; the gap L3 between the front panel 101 and the rear panel 102, that is, the thickness of the tweeter rear cavity, is between 4.5 mm and 5 mm; in this way, the treble directivity of the tweeter structure 12 can be improved, and the sound pressure of the tweeter structure 12 can be increased.

[0037] See also Figure 2 Furthermore, the sound emitting structure 11 on the left side of the front panel 101 covers the left edge of the front panel 101 , and the sound emitting structure 11 on the right side of the front panel 101 covers the right edge of the front panel 101 .

[0038] In this embodiment, the sound emitting structure 11 on the left side of the front panel 101 covers the left side edge of the front panel 101, which can increase the sound output length of the sound output structure 11 on the left side of the front panel 101 and increase the sound output pressure of the tweeter structure 12 on the left side; similarly, the sound output structure 11 on the right side of the front panel 101 covers the right side edge of the front panel 101, which can increase the sound output length of the sound output structure 11 on the right side of the front panel 101 and increase the sound output pressure of the tweeter structure 12 on the right side.

[0039] See also Figure 5 The left sound field formed by the tweeter structure 12 on the left side and the right sound field formed by the tweeter structure 12 on the right side form a mixed sound field outside the length L4 from the front panel 102, and the L4 is approximately equal to 250mm, indicating that at this time, the mixed sound field is in front of the front panel 102 and very close to the front panel 102, proving that the tweeter directivity of this embodiment is excellent.

[0040] Please also read Figure 1-2, 6-7, further, the support box assembly 20 includes a box body 21, the box body 21 is provided with a partition 22 for dividing the internal space of the box body 21 into a bass front cavity 201 and a bass rear cavity 202, the partition 22 is provided with a bass speaker 23, the bass speaker 23 passes through the partition 22 and the sound-emitting surface of the bass speaker 23 faces the bass front cavity 201; three bass reflex ports 1021 are opened on the rear panel 102, the three bass reflex ports 1021 are connected with the bass front cavity 201, three bass reflex pipe channels 1022 are formed between the rear panel 102 and the front panel 101, each of the bass reflex pipe channels 1022 connects each of the bass reflex ports 1021 with the sound outlet structure 11 on the bottom side.

[0041] In this embodiment, the box body 21 is bounded by the partition 22 , and the internal space of the box body 21 is divided into the bass front cavity 201 and the bass rear cavity 202 . The bass speaker 23 is arranged on the partition 22 and penetrates the partition 22, and the sound-emitting surface of the bass speaker 23 faces the bass front cavity 201, so as to emit low-frequency sound through the bass front cavity 201; three bass reflex ports 1021 are opened on the rear panel 102, and the three bass reflex ports 1021 are connected with the bass front cavity 201, and three bass reflex tube channels 1022 are formed between the rear panel 102 and the front panel 101, and each of the bass reflex tube channels 1022 connects each of the bass reflex ports 1021 with the sound outlet structure 11 on the bottom side, that is, the low-frequency sound emitted by the bass speaker 23 is transmitted to the front of the front panel 101, that is, the user side, through the bass front cavity 201, the three bass reflex ports 1021, the three bass reflex tube channels 1022 and the sound outlet structure 11 on the bottom edge in sequence.

[0042] like Figure 7 As shown, the bass structure is formed by improving the bandpass bass acoustic system, and forms a three-section balanced sound beam waveguide bandpass bass acoustic system. The so-called "three sections" means that the inverted port of the bandpass bass acoustic system is equivalent to the three inverted ports 1021 of this embodiment, and the inverted tube of the bandpass bass acoustic system is equivalent to the three inverted tube channels 1022 of this embodiment. The "balance" is to adjust the Q value (quality factor) by adjusting the sound output cross-sectional area and length of the three inverted tube channels 1022; the so-called "sound beam waveguide" is to constrain the transmission direction of the low-frequency sound through the three inverted tube channels 1022, so that the low-frequency sound is transmitted farther. In this embodiment, the support box assembly 20 and the main body assembly 10 are combined to form the bass structure. The bass structure is designed as a three-section balanced sound beam waveguide bandpass bass acoustic system, which can achieve low-frequency dive and improve the bass expression of the audio playback system.

[0043] like Figure 7As shown, further, the opening sizes of the three inverted ports 1021 are equal, that is, A1=A2=A3; the sum of the opening sizes of the three inverted ports 1021 is equal to the opening size of the inverted tube of the equivalent bandpass bass acoustic system, that is, A1+A2+A3=S; the inverted tube channel 1022 includes an equal width section W1 and a widening section W2, the equal width section W1 connects the inverted ports 1021 and the widening section W2, and the length of the equal width section W2 is equal to 1-1 of the opening size of the inverted port 1021. 5 times, that is, W1 = 1-1.5 times A1; the length of the widening section W2 is equal to 1-2.25 times the opening size of the bass port 1021, that is, W2 = 1-2.25 times A1, that is, W2 = 1-1.5 times W1; the opening widths of the two bass reflex tube channels 1022 on both sides are equal, that is, D1 = D3, and the opening widths of the bass reflex tube channels 1022 on both sides are 2-3 times the opening width of the middle bass reflex tube channel 1022, that is, D1 = D3 = 2-3 times D2. Thereby improving the low-frequency diving ability of the bass structure, that is, improving the bass expression of the audio playback system

[0044] See also Figure 2 Furthermore, the sound-emitting structure 11 on the bottom side covers the bottom edge of the front panel 101 and is divided into three sound-emitting sections (not shown), and the three inverted tube channels 1022 are connected to the three sound-emitting sections in a one-to-one correspondence.

[0045] In this embodiment, the sound outlet structure 11 on the bottom side covers the entire bottom edge of the front panel 101, which can increase the sound outlet length of the sound outlet structure 11 on the bottom side on the front panel 101 and increase the sound pressure of the tweeter structure 12 on the bottom side; the sound outlet structure 11 on the bottom side is divided into three sound outlet sections, and the three bass reflex channels 1022 are connected to the three sound outlet sections in a one-to-one correspondence. By adjusting the cross-sectional area and length of the three bass reflex channels 1022, the Q value of the bass structure can be adjusted, thereby improving the bass expression of the audio playback device 100.

[0046] See also Figure 6 Furthermore, the number of the woofers 23 is two, a woofer interface 24 is provided on the inner wall of the box body 21 , and the woofer 23 is electrically connected to the woofer interface 24 .

[0047] In this embodiment, by setting the number of the subwoofers 23 to two, the bass performance of the audio playback device 100 can be improved. At the same time, by connecting the subwoofer 23 to the subwoofer interface 24, the audio signal to be played can be received through the subwoofer interface 24.

[0048] See also Figure 3 ,4 Further, the audio playback device 100 is a speaker, an electronic photo frame or a tablet computer. When the audio playback device 100 is an electronic photo frame or a tablet computer, the front panel 101 is a printed circuit board, and a display panel 105 is arranged on the printed circuit board.

[0049] In this embodiment, when the audio playback device 100 is a speaker, the front panel 101 can be a conventional plate material such as a wooden board, a plastic board, an acrylic board, etc.; when the audio playback device 100 is an electronic photo frame or a tablet computer, the front panel 101 is a printed circuit board, and the tweeter rear cavity 122 is formed by the printed circuit board and the rear panel 102; a display panel 105 is provided on the printed circuit board, and pictures or video information can be displayed through the display panel 105.

[0050] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An audio playback device, characterized in that: The audio playback device comprises: A main body component, the main body component comprising a front panel and a rear panel arranged at intervals, the left edge, the bottom edge and the right edge of the front panel are all provided with a sound outlet structure for emitting sound forward, the sound outlet structure being a sound outlet gap and / or a sound outlet hole array; Two tweeter structures, each of the tweeter structures includes a tweeter front cavity, a tweeter rear cavity and a speaker array formed between the front panel and the rear panel, the speaker array separates the tweeter front cavity and the tweeter rear cavity, and the sound-emitting surface of the speaker array is arranged toward the rear panel, the sound-emitting structure on the left side is connected to the tweeter front cavity on the left side, and the sound-emitting structure on the right side is connected to the tweeter front cavity on the right side; A support box assembly, wherein the support box assembly is connected to the rear panel, and the support box assembly and the main body assembly together form a bass structure, and the bass structure is connected to the sound-emitting structure on the bottom side; the support box assembly includes a box body, and a partition is arranged in the box body to divide the internal space of the box body into a bass front cavity and a bass rear cavity, and a bass speaker is arranged on the partition, and the bass speaker passes through the partition and the sound-emitting surface of the bass speaker faces the bass front cavity; Three bass reflex ports are provided on the rear panel, the three bass reflex ports are connected to the bass front cavity, three bass reflex pipe channels are formed between the rear panel and the front panel, each of the bass reflex pipe channels connects each of the bass reflex ports with the sound outlet structure on the bottom side; wherein, the opening sizes of the three bass reflex ports are equal; the sum of the opening sizes of the three bass reflex ports is equal to the opening size of the bass reflex pipe of an equivalent bandpass bass acoustic system; the bass reflex pipe channel includes an equal width section and an expanded section, the equal width section connects the bass reflex ports and the expanded section, the length of the equal width section is equal to 1-1.5 times the opening size of the bass reflex port; the length of the expanded section is equal to 1-2.25 times the opening size of the bass reflex port; the opening widths of the two bass reflex pipe channels on both sides are equal, and the opening widths of the bass reflex pipe channels on both sides are 2-3 times the opening width of the middle bass reflex pipe channel, and the sound outlet structure on the bottom side covers the bottom edge of the front panel and is divided into three sound outlet sections.

2. The audio playback device according to claim 1, characterized in that: The main body component also includes a side panel, which extends from the edge of the rear panel to the front panel; the side panel and the front panel are spaced apart to form the sound outlet gap, or the side panel is connected to the front panel, and the sound outlet hole array is opened on the left edge, bottom edge and right edge of the front panel.

3. The audio playback device according to claim 2, characterized in that: The tweeter structure also includes: A first baffle, the first baffle extending from the front panel to an end of the speaker array close to the side panel, and the first baffle is spaced apart from the side panel; a second baffle, the second baffle extending from the rear panel to an end of the speaker array away from the side panel; Among them, the first baffle, the sound-emitting surface of the speaker array, the second baffle, the rear panel, and the side panel together form the tweeter front cavity of the speaker array, and the back of the speaker array and the first baffle, the front panel, the rear panel, and the second baffle together form the tweeter rear cavity of the speaker array.

4. The audio playback device according to claim 3, characterized in that: The width of the sound outlet gap is greater than or equal to 2mm, the sound outlet hole array includes a plurality of sound outlet holes arranged in an array, and the diameter of the sound outlet holes is greater than or equal to 2mm; the gap between the sound emitting surface of the speaker array and the rear panel is greater than or equal to 2mm; the gap between the front panel and the rear panel is between 4.5mm-5mm.

5. The audio playback device according to claim 1, characterized in that: The sound emitting structure on the left side of the front panel covers the left edge of the front panel, and the sound emitting structure on the right side of the front panel covers the right edge of the front panel.

6. The audio playback device according to claim 1, characterized in that: The three inverted tube channels are connected to the three sound output sections in a one-to-one correspondence.

7. The audio playback device according to claim 1, characterized in that: The number of the woofers is two, a woofer interface is provided on the inner wall of the support box, and the woofer is electrically connected to the woofer interface.

8. The audio playback device according to any one of claims 1 to 7, characterized in that: The audio playback device is a speaker, an electronic photo frame or a tablet computer. When the audio playback device is an electronic photo frame or a tablet computer, the front panel is a printed circuit board, and a display panel is arranged on the printed circuit board.

Images