Sound box

Abstract

The utility model discloses a sound box, which comprises a box body, a rear plate, a loudspeaker assembly, a mainboard and an inverter tube, and is characterized in that the box body is made of wood; the rear plate is mounted on the box body, and a phase inversion hole is formed in the rear plate in a penetrating manner; the loudspeaker assembly, the box body and the rear plate are enclosed to form an accommodating space, and the phase inversion hole is communicated with the accommodating space; the main board is located in the containing space and fixed to the rear board, and the loudspeaker assembly is electrically connected with the main board. The inverter tube is located in the containing space, the cross section of the inverter tube is flat, one end of the inverter tube is fixed to the rear plate and communicated with the inverter hole, and the other end of the inverter tube is bent and then arranged close to the loudspeaker assembly. According to the utility model, the box body of the sound box is made of wood, and the wood sound box has the characteristics of good tone quality and thick hand feeling; the length of the inverter tube is increased, the low-frequency gain of the transmitted sound is increased, the bass effect of the sound box product is enhanced, and basic parts are installed in the accommodating space under the condition that the appearance size of the sound box is not changed.

Description

Technical Field

[0001] The utility model relates to the technical field of sound box structures, in particular to a sound box. Background Art

[0002] At present, the bass reflex speaker, also known as the low-frequency radiation speaker, is also the most commonly used cabinet design in multimedia speakers. The difference between it and the closed speaker is that the cabinet is designed with a bass reflex hole, and an air duct (bass reflex tube) is installed inside the speaker. The air duct is connected to the bass reflex hole to allow air to circulate inside and outside the cabinet. It has higher power handling capacity and lower distortion than the closed cabinet, with sufficient volume and high sensitivity. It is suitable for ordinary families, halls or professional places. When the speaker assembly is working, the sound waves radiated from the back pass through the air duct and radiate from the bass reflex hole, superimposed with the sound waves of the speaker assembly, and then radiate together to enhance the low-frequency effect.

[0003] The dimensions of bass reflex speakers on the market are generally 240mmx150mmx138mm. Basic parts such as power board, MIC board, battery and round air duct are installed in the speaker box. The round air duct is generally a straight cylindrical structure extending along the width of the speaker. The speaker box is mostly made of all plastic material, and the structural design is relatively easy. It has many functional requirements. The plastic variable design can be used to meet the function of synchronous belt microphone, that is, the MIC board can also be installed in the speaker box to facilitate connection with the external microphone. The thickness of the plastic box is relatively thin, about 2-3mm. Under the same configuration, if it is replaced with a wooden box, the thickness of the wooden box is 9mm. Compared with the plastic box, the wooden box has the characteristics of good sound quality and thick feel.

[0004] However, while ensuring that the external dimensions remain unchanged, the internal volume of the wooden speaker will be nearly 1L less than that of the plastic speaker, which will affect the bass. At the same time, it is difficult to install all the above basic parts in the wooden speaker. Utility Model Content

[0005] The purpose of the utility model is to provide a speaker to solve the technical problem that the existing speakers use a wooden box body while ensuring that the external dimensions remain unchanged, and the internal volume of the corresponding speaker is nearly 1L less than that of a plastic box, which will affect the bass, and it is difficult to install all the above basic parts in the wooden speaker.

[0006] The utility model is achieved in this way:

[0007] The utility model provides a sound box, comprising:

[0008] The box is made of wood;

[0009] A rear plate is mounted on the box body, and a phase inversion hole is provided through the rear plate;

[0010] A speaker assembly, wherein the speaker assembly, the box body and the rear plate enclose a receiving space, and the inverted hole is connected to the receiving space;

[0011] A mainboard, located in the accommodation space and fixed to the rear plate, the speaker assembly being electrically connected to the mainboard;

[0012] The inverted tube is located in the accommodating space, has a flat cross section, one end of the inverted tube is fixed to the rear plate and communicated with the inverted hole, and the other end is bent and arranged close to the speaker assembly.

[0013] Furthermore, the inverter tube is arranged in the accommodating space along the length direction of the box body.

[0014] Further, the bass reflex tube includes a first tube body, a second tube body, a third tube body and a fourth tube body connected in sequence, the first tube body and the third tube body are both perpendicular to the back plate, the second tube body and the fourth tube body are both parallel to the back plate, the first tube body is installed on the back plate and connected to the bass reflex hole, the fourth tube body is arranged close to the speaker assembly, and the cross-sections of the first tube body, the second tube body, the third tube body and the fourth tube body are all flat.

[0015] Furthermore, the speaker assembly includes a woofer, a first tweeter and a second tweeter, the woofer and the first tweeter are both mounted on the box, the woofer, the first tweeter, the box and the back plate enclose the accommodating space, the bass reflex tube is arranged close to the first tweeter, the second tweeter is located in the accommodating space and fixed to the back plate, the back plate is also provided with a plurality of sound holes that are all connected to the accommodating space, and each of the sound holes is arranged corresponding to the second tweeter.

[0016] Furthermore, the woofer and the first tweeter are both fixed to the front side of the box, and the rear plate is fixed to the rear side of the box.

[0017] Furthermore, the sound box also includes a MIC board for connecting to a microphone via Bluetooth. The MIC board is located in the accommodating space and fixed on the inverted tube. The MIC board is electrically connected to the main board.

[0018] Furthermore, the speaker also includes a power supply assembly, which includes a power supply board, a lithium battery and a charging socket. The power supply board, the lithium battery and the charging socket are all located in the accommodating space, the power supply board and the charging socket are both fixed to the back plate, the lithium battery is fixed to the box body, the back plate is also penetrated by a through hole connected to the accommodating space, the charging socket is arranged corresponding to the through hole, and the power supply board, the lithium battery and the charging socket are all electrically connected to the mainboard.

[0019] Furthermore, the rear plate includes a rear cover and a boss protruding from the rear cover, the rear cover is connected to the box body, the speaker assembly, the box body and the rear cover enclose the accommodating space, the boss is located in the accommodating space, the inverted tube is installed on the boss, the inverted hole passes through the rear cover and the boss in sequence from a side of the rear cover away from the boss, and the main board is fixed to the rear cover.

[0020] Furthermore, the speaker also includes a button assembly, which includes a panel, a hard rubber keyboard, a function group key and a plurality of knob keys. The box body is penetrated by an embedding hole connected to the accommodating space, and the panel is installed on the embedding hole. The panel is penetrated by a first key hole and a plurality of second key holes. The hard rubber keyboard is fixed on the box body and located in the accommodating space. The function group key and the knob key are respectively installed on the first key hole and the second key hole. The function group key and the knob key are both connected to the hard rubber keyboard, and the hard rubber keyboard is electrically connected to the mainboard.

[0021] Furthermore, the sound box also includes a mesh panel, which is located outside the accommodating space, installed on the box body, and covers a portion of the speaker assembly.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The speaker box of the present invention is made of wood, which has the characteristics of good sound quality and thick hand feel compared with the box made of plastic material; and the cross-section of the bass reflex tube is flat, and the bass reflex tube and the main board are integrated on the back panel, one end of the bass reflex tube is fixed on the back panel and connected with the bass reflex hole, and the other end is bent and arranged close to the speaker assembly, which extends the length of the bass reflex tube, increases the low-frequency gain of the sound transmitted by it, enhances the bass effect of the speaker product, avoids changes in sound quality, effectively solves the influence of the reduction of the internal volume of the wooden speaker on the bass, and meets the requirements of the wooden speaker for sound quality. At the same time, while ensuring that the outer dimensions of the speaker remain unchanged, the basic parts are installed in the accommodating space of the wooden speaker, which greatly improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the speaker provided by the embodiment of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 2 for Figure 1 The explosion Figure 1 ;

[0026] Figure 3 for Figure 1 The explosion Figure 2 ;

[0027] Figure 4 The structure of the speaker provided by the embodiment of the utility model is shown in FIG. Figure 2 ;

[0028] Figure 5 for Figure 4 Sectional view of AA in the middle;

[0029] Figure 6 for Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0030] Figure 7 A schematic diagram of the structure of the inverter tube provided in the embodiment of the utility model installed on the rear plate;

[0031] Figure 8 for Figure 7 Exploded diagram of

[0032] Fig. 9 A schematic diagram of the structure of the inverter tube provided in the embodiment of the utility model;

[0033] Fig.10 A schematic diagram of the structure of a button assembly provided in an embodiment of the utility model;

[0034] Fig.11 for Fig.10 Exploded diagram.

[0035] In the figure:

[0036] 10. Box body; 11. First mounting hole; 12. Second mounting hole; 13. Embedding hole; 20. Back plate; 21. Inverted hole; 22. Sound hole; 23. Back cover; 24. Boss; 25. Stud; 30. Speaker assembly; 31. Woofer; 32. First tweeter; 33. Second tweeter; 40. Main board; 50. Inverted tube; 51. First tube body; 52. Second tube body; 53. Third tube body; 54. Fourth tube body; 60. Accommodating space; 70. Bracket; 80. MIC board; 90. Power supply assembly; 91. Power supply board ; 92, lithium battery; 93, battery holder; 94, charging socket; 100, button assembly; 110, panel; 111, first key hole; 112, second key hole; 120, hard rubber keyboard; 121, control panel; 122, button; 123, coding switch; 130, function group key; 131, light-transmitting button; 132, hard button holder; 1321, mark; 133, soft rubber pad; 1331, boss; 140, knob key; 200, mesh plate; 300, nameplate; 400, socket seat; 500, silicone cover; 600, hand strap. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0038] See also Figures 1 to 8 As shown, the embodiment of the utility model discloses a sound box, including a box body 10, a back plate 20, a speaker assembly 30, a main board 40 and a phase reversal tube 50. The box body 10 is made of wood; the back plate 20 is installed on the box body 10, and the back plate 20 is made of plastic material. The back plate 20 is penetrated by a phase reversal hole 21; a part of the speaker assembly 30 is installed on the box body 10, and the other part is installed on the back plate 20. The speaker assembly 30, the box body 10 and the back plate 20 enclose a receiving space 60, and the phase reversal hole 21 is connected to the receiving space 60; the main board 40 is located in the receiving space 60 and fixed on the rear plate 20, the speaker assembly 30 is electrically connected to the main board 40; the bass reflex tube 50 is located in the accommodating space 60, the cross-section of the bass reflex tube 50 is flat, and one end of the bass reflex tube 50 is fixed on the rear plate 20 and connected to the bass reflex hole 21, and the other end is bent and arranged close to the speaker assembly 30. The bass reflex tube 50 allows the bass sound waves in the accommodating space 60 to be inverted and superimposed with the bass in front of the speaker, making the low frequency fuller, effectively solving the impact of the reduction of the internal volume of the wooden speaker on the bass, meeting the sound quality requirements of the wooden speaker, and greatly improving the user experience.

[0039] The speaker assembly 30 includes a woofer 31, a first tweeter 32, and a second tweeter 33. The box 10 is provided with a first mounting hole 11 and a second mounting hole 12. The first mounting hole 11 and the second mounting hole 12 are both connected to the accommodating space 60. The woofer 31 and the first tweeter 32 are respectively mounted on the first mounting hole 11 and the second mounting hole 12 of the box 10. The woofer 31, the first tweeter 32, the box 10, and the back plate 20 enclose the accommodating space 60. The inverted tube 50 is close to the first mounting hole 11 and the second mounting hole 12. The first tweeter 32 is arranged near the back panel 20, the second tweeter 33 is located in the accommodating space 60 and fixed on the back panel 20, the back panel 20 is also provided with a plurality of sound holes 22 which are connected with the accommodating space 60, each sound hole 22 is arranged corresponding to the second tweeter 33, and the sound emitted by the second tweeter 33 can be emitted from the sound hole 22, the woofer 31, the first tweeter 32 and the second tweeter 33 are all electrically connected to the main board 40, the woofer 31 is 10mm higher than the conventional woofer and has a large stroke.

[0040] The woofer 31 and the first tweeter 32 are both fixed to the front side of the box 10, the rear plate 20 is fixed to the rear side of the box 10, and the second tweeter 33 is arranged on the front and rear sides of the speaker opposite to the first tweeter 32 to improve the sound quality in the speaker.

[0041] It should be noted that the speaker is a bass reflex speaker, specifically a rear bass reflex speaker. The dimensions of existing speakers on the market are generally 240mmx150mmx138mm, and the thickness of the plastic box 10 is about 2-3mm. Under the same configuration, if a wooden box 10 is used, the speaker made of the wooden box 10 is hereinafter referred to as a wooden speaker, and the speaker made of the plastic box is hereinafter referred to as a plastic speaker. The thickness of the wooden box 10 is 9mm. The internal volume of the corresponding speaker using the wooden box 10 is nearly 1L less than that of the plastic one. The conventional round air duct was originally used with a normal-sized 4-inch woofer, which would make the bass fail to meet the product requirements and the speaker needs to be increased. The height of the corresponding woofer should be increased, so the woofer 31 of this embodiment is 10mm higher than the conventional woofer, which enhances the bass effect of the product. The conventional round air duct cannot be placed in the wooden speaker. In order to fit all the parts into the wooden speaker, the previous round air duct is pressed into a bass reflex tube 50 with a flat cross section, and the length of the bass reflex tube 50 is extended. As the length of the bass reflex tube 50 increases and the inner diameter decreases, the low-frequency gain of the sound transmitted by it increases, which enhances the bass effect of the speaker product and avoids changes in the sound quality. At the same time, the basic parts can be installed in the wooden speaker while ensuring that the outer dimensions of the speaker remain unchanged.

[0042] In some embodiments, the inverter tube 50 is disposed in the accommodating space 60 along the length direction of the box 10 to maximize the length of the inverter tube 50 , and the inverter tube 50 is spaced apart from the inner wall of the box 10 .

[0043] Please read further Figures 2 to 9 In this embodiment, the inverted tube 50 includes a first tube body 51, a second tube body 52, a third tube body 53 and a fourth tube body 54 which are connected in sequence. The first tube body 51, the second tube body 52, the third tube body 53 and the fourth tube body 54 are connected by an arc transition. The first tube body 51 and the third tube body 53 are both perpendicular to the rear plate 20, the first tube body 51 and the third tube body 53 are parallel, the second tube body 52 and the fourth tube body 54 are both parallel to the rear plate 20, the first tube body 51 is mounted on the rear plate 20 and communicated with the inverted hole 21, the fourth tube body 54 is arranged close to the speaker assembly 30, the distance between the fourth tube body 54 and the rear plate 20 is greater than the distance between the second tube body 52 and the rear plate 20, the fourth tube body 54 is suspended, the cross sections of the first tube body 51, the second tube body 52, the third tube body 53 and the fourth tube body 54 are all flat, and the large-stroke woofer 31 is combined with the flat and long super-long inverted tube 50 to meet the product's sound quality requirements.

[0044] In some embodiments, the speaker further includes a plurality of brackets 70 , which are located in the accommodating space 60 , with one end of the bracket 70 connected to the rear panel 20 and the other end connected to the bass reflex tube 50 to support the bass reflex tube 50 and improve the vibration resistance of the bass reflex tube 50 .

[0045] In this embodiment, the speaker also includes a MIC board 80, which is located in the accommodating space 60 and fixed on the bass reflex tube 50 to prevent other electronic components from interfering with the MIC board 80 during operation. The MIC board 80 is electrically connected to the main board 40, and the MIC board 80 can be used for Bluetooth connection with an external microphone.

[0046] In this embodiment, the speaker also includes a power supply assembly 90, which includes a power supply board 91, a lithium battery 92, a battery rack 93 and a charging socket 94. The power supply board 91, the lithium battery 92, the battery rack 93 and the charging socket 94 are all located in the accommodating space 60. The power supply board 91 and the charging socket 94 are both fixed on the back plate 20. The lithium battery 92 is fixed to the box body 10 through the battery rack 93. The back plate 20 is also penetrated by a through hole connected to the accommodating space 60. The charging socket 94 is arranged corresponding to the through hole. The power supply board 91, the lithium battery 92 and the charging socket 94 are all electrically connected to the mainboard 40. The lithium battery 92 can be powered by the charging socket 94.

[0047] The rear plate 20 includes a rear cover 23, a boss 24 and a plurality of studs 25 arranged at intervals. The boss 24 and the studs 25 are both protruded on the rear cover 23. The rear cover 23 is connected to the box body 10. The speaker assembly 30, the box body 10 and the rear cover 23 enclose the accommodating space 60. The boss 24 and the studs 25 are both located in the accommodating space 60. The inverted tube 50 is installed on the boss 24. The inverted hole 21 passes through the rear cover 23 and the boss 24 in sequence from the side of the rear cover 23 away from the boss 24. The main board 40 and the second tweeter 33 are both fixed on the rear cover 23. Each stud 25 is arranged around the outside of the second tweeter 33. The power board 91 is fixed on each stud 25. The power board 91 covers the second tweeter 33 and is arranged at intervals from the second tweeter 33. The spatial layout is fully utilized and most of the parts are assembled on the plastic rear plate 20.

[0048] Please read further Figures 2 to 6 ,as well as Figure 10 to Figure 11 In this embodiment, the speaker also includes a button assembly 100, which includes a panel 110, a hard rubber keyboard 120, a function group key 130 and a plurality of knob keys 140. The box body 10 is also penetrated with an embedding hole 13 connected to the accommodating space 60, the panel 110 is installed on the embedding hole 13, and the panel 110 is penetrated with a first key hole 111 and a plurality of second key holes 112. The hard rubber keyboard 120 is fixed on the box body 10 and is located in the accommodating space 60. The function group key 130 and the knob key 140 are respectively installed on the first key hole 111 and the second key hole 112. The function group key 130 and the knob key 140 are both connected to the hard rubber keyboard 120, and the hard rubber keyboard 120 is electrically connected to the main board 40. The speaker can be adjusted through the button assembly 100.

[0049] The hard rubber keyboard 120 includes a control panel 121, an LED light, a plurality of buttons 122 and a plurality of coding switches 123. The LED light, the button 122 and the coding switch 123 are all protruding from the control panel 121. The LED light, the button 122 and the coding switch 123 are all electrically connected to the control panel 121. The control panel 121 is mounted on the inner wall of the box body 10. The knob key 140 is connected to the corresponding coding switch 123.

[0050] The function group key 130 includes a light-transmitting button 131, a hard button frame 132 and a soft rubber pad 133. The number of buttons 122 is four. The four buttons 122 are arranged outside the LED lamp. The soft rubber pad 133 is located in the second key hole 112. Four convex columns 1331 are arranged at the bottom of the soft rubber pad 133. Each convex column 1331 abuts against each button 122 respectively. The light-transmitting button 131 is clamped on the top of the soft rubber pad 133. The hard button frame 132 is annular and is installed on the light-transmitting button 131. The light-transmitting button 131 passes through the annular hard button frame 133 at the same time. 2. The hard button frame 132 is provided with a mark 1321. By pressing each mark 1321, the corresponding button 122 can be driven to move through the corresponding convex column 1331 to realize the basic key function of the speaker. The soft rubber pad 133 has a light-transmitting effect, and the hard button frame 132 has a light-shielding effect. The light emitted by the LED lamp can enter the light-transmitting button 131 through the soft rubber pad 133. The control board 121 can drive the LED lamp to emit light of various colors and transmit it to the light-transmitting button 131, so that the light-transmitting button 131 displays various colors of light to indirectly reflect the various working states of the speaker.

[0051] The speaker box also includes a mesh panel 200 and a nameplate 300, both of which are located outside the accommodating space 60. The mesh panel 200 is installed on the box body 10, and the mesh panel 200 covers part of the speaker assembly 30 to prevent external debris from touching the speaker assembly 30. The nameplate 300 is installed on the mesh panel 200, and the mesh panel 200 is made of iron material.

[0052] The speaker box also includes a jack socket 400, which is located in the accommodating space 60. The jack socket 400 is installed on the main board 40. The back plate 20 is correspondingly provided with a avoidance hole. The jack socket 400 is correspondingly arranged with the avoidance hole to facilitate connection with an external earphone.

[0053] In some embodiments, the speaker also includes a silicone cover 500 and a carrying strap 600. The silicone cover 500 is installed on the back panel 20 and covers the charging port 94 and the jack socket 400 to prevent external dust or moisture from entering. The carrying strap 600 is installed on the box body 10 for people to lift the speaker by hand.

[0054] The speaker assembly method is as follows:

[0055] First, the button assembly 100, the first tweeter 32 and the lithium battery 92 are sequentially installed on the wooden box 10, wherein the lithium battery 92 is installed on the inner wall of the box 10 through the battery rack 93; then the MIC board 80 is installed on the bass reflex tube 50, and the bass reflex tube 50, the second tweeter 33, the main board 40 and the power board 91 are sequentially installed on the back plate 20, the relevant wiring is fixed, and then the silicone cover 500 is installed, and the bass reflex tube 50 can be fixed on the back plate 20 by a number of brackets 70; then the back plate 20 is installed on the box 10, the nameplate 300 is installed on the mesh plate 200, the mesh plate 200 is pressed on the front of the box 10 by interference fit, and finally the hand strap 600 is installed to complete the assembly.

[0056] In summary, the cabinet 10 of the speaker in the present invention is made of wood material, which can make the wooden speaker have the characteristics of good sound quality and thick feel compared with the cabinet 10 made of plastic material; and the cross-section of the bass reflex tube 50 is flat, and the bass reflex tube 50 and the main board 40 are integrated on the back plate 20, one end of the bass reflex tube 50 is fixed on the back plate 20 and connected with the bass reflex hole 21, and the other end is bent and arranged close to the speaker assembly 30, which extends the length of the bass reflex tube 50, increases the low-frequency gain of the sound transmitted by it, enhances the bass effect of the speaker product, and avoids changes in sound quality. While ensuring that the outer dimensions of the speaker remain unchanged, the basic parts are installed in the accommodating space 60 of the wooden speaker, which effectively solves the influence of the reduced internal volume of the wooden speaker on the bass, meets the requirements of the wooden speaker for sound quality, and greatly improves the user experience.

[0057] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A sound box, characterized in that: include: The box is made of wood; A rear plate is mounted on the box body, and a phase inversion hole is provided through the rear plate; A speaker assembly, wherein the speaker assembly, the box body and the rear plate enclose a receiving space, and the inverted hole is connected to the receiving space; A mainboard, located in the accommodation space and fixed to the rear plate, the speaker assembly being electrically connected to the mainboard; The inverted tube is located in the accommodating space, has a flat cross section, one end of the inverted tube is fixed to the rear plate and communicated with the inverted hole, and the other end is bent and arranged close to the speaker assembly.

2. The speaker according to claim 1, characterized in that: The inverter tube is arranged in the accommodating space along the length direction of the box body.

3. The speaker according to claim 1, characterized in that: The bass reflex tube includes a first tube body, a second tube body, a third tube body and a fourth tube body connected in sequence, the first tube body and the third tube body are both perpendicular to the rear plate, the second tube body and the fourth tube body are both parallel to the rear plate, the first tube body is mounted on the rear plate and connected to the bass reflex hole, the fourth tube body is arranged close to the speaker assembly, and the cross sections of the first tube body, the second tube body, the third tube body and the fourth tube body are all flat.

4. The speaker according to claim 1, characterized in that: The speaker assembly includes a woofer, a first tweeter and a second tweeter, the woofer and the first tweeter are both mounted on the box, the woofer, the first tweeter, the box and the back plate enclose the accommodating space, the bass reflex tube is arranged close to the first tweeter, the second tweeter is located in the accommodating space and fixed to the back plate, the back plate is also provided with a plurality of sound holes that are all connected to the accommodating space, and each of the sound holes is arranged corresponding to the second tweeter.

5. The speaker according to claim 4, characterized in that: The woofer and the first tweeter are both fixed to the front side of the box, and the rear plate is fixed to the rear side of the box.

6. The speaker according to claim 1, characterized in that: The sound box further comprises a MIC board for connecting to a microphone via Bluetooth. The MIC board is located in the accommodation space and fixed on the inverted tube. The MIC board is electrically connected to the main board.

7. The speaker according to claim 1, characterized in that: The speaker also includes a power supply assembly, which includes a power supply board, a lithium battery and a charging socket. The power supply board, the lithium battery and the charging socket are all located in the accommodating space, and the power supply board and the charging socket are both fixed to the back plate. The lithium battery is fixed to the box body. The back plate is also penetrated by a through hole connected to the accommodating space. The charging socket is arranged corresponding to the through hole. The power supply board, the lithium battery and the charging socket are all electrically connected to the mainboard.

8. The speaker according to claim 1, characterized in that: The rear plate includes a rear cover and a boss protruding from the rear cover, the rear cover is connected to the box body, the speaker assembly, the box body and the rear cover enclose the accommodating space, the boss is located in the accommodating space, the inverted tube is installed on the boss, the inverted hole passes through the rear cover and the boss in sequence from a side of the rear cover away from the boss, and the main board is fixed to the rear cover.

9. The speaker according to claim 1, characterized in that: The speaker also includes a button assembly, which includes a panel, a hard rubber keyboard, a function group key and a plurality of knob keys. The box body is penetrated by an embedding hole connected to the accommodating space, and the panel is installed on the embedding hole. The panel is penetrated by a first key hole and a plurality of second key holes. The hard rubber keyboard is fixed on the box body and located in the accommodating space. The function group key and the knob key are respectively installed on the first key hole and the second key hole. The function group key and the knob key are both connected to the hard rubber keyboard, and the hard rubber keyboard is electrically connected to the mainboard.

10. The speaker according to claim 1, characterized in that: The sound box further comprises a mesh panel, which is located outside the accommodation space, mounted on the box body, and covers a portion of the speaker assembly.

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