Speaker box

Abstract

The present invention provides a speaker box, which includes a shell with a receiving cavity and a speaker unit received in the shell, the shell includes a support arm extending toward the receiving cavity, the speaker unit includes a basin fixed on the support arm, a vibration system fixed on the basin, and a magnetic circuit system driving the vibration system to vibrate, the vibration system includes a diaphragm fixed on the basin and a voice coil driving the diaphragm to vibrate and produce sound, the diaphragm includes a dome, a folded ring spaced around the dome, an outer edge spaced around the folded ring and fixed on the basin, and a connecting portion connecting the folded ring and the outer edge, the shell also includes a retaining wall spaced from the basin, the outer edge is glued and fixed to the support arm, and the connecting portion includes a first connecting portion arranged opposite to the retaining wall. The first connecting portion of the speaker box of the present invention is a flat plate structure perpendicular to the vibration direction, which effectively avoids the poor pure sound of the speaker box in the prior art and improves the acoustic performance.

Description

Technical Field

[0001] The invention relates to the field of electroacoustic conversion, and in particular to a loudspeaker box. Background Art

[0002] With the rapid development of mobile phones and other portable devices, people have higher and higher requirements for product functionality, especially for sound performance. Therefore, the electroacoustic system needs to continuously improve its performance, and high-quality speaker boxes are one of the necessary conditions to achieve this higher performance sound.

[0003] The speaker box of the related art has a shell with a receiving cavity and a speaker unit received in the shell. The shell includes a support arm extending toward the receiving cavity. The speaker unit includes a basin frame, a vibration system and a magnetic circuit system. The vibration system includes a diaphragm fixed to the basin frame and a voice coil driving the diaphragm to vibrate and produce sound. The diaphragm includes a dome, a folding ring that surrounds the dome at intervals, an outer edge that surrounds the folding ring at intervals and is fixed to the basin frame, and a connecting portion connecting the folding ring and the outer edge. The outer edge is glued and fixed to the support arm. The shell also includes a retaining wall that is spaced apart from the basin frame and located on the support arm. During the assembly process of the speaker box, when the speaker unit is installed on the support arm, the retaining wall is used to position the speaker unit so that the speaker unit is accurately assembled in the shell. However, when the outer edge is glued and fixed to the support arm with the retaining wall, due to the small interval between the retaining wall and the outer edge, there will be excess glue overflowing to the connecting portion. However, the connecting portion of the prior art is a concave folding ring structure. Therefore, when the glue overflows to this connecting portion, it will cause poor pure sound of the speaker box, resulting in a decrease in its acoustic performance.

[0004] Therefore, it is necessary to provide a new speaker box to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical problems and provide a speaker box with good acoustic performance.

[0006] To achieve the above-mentioned purpose, a speaker box is provided, comprising a shell having a receiving cavity and a speaker unit received in the shell, the shell comprising a support arm extending toward the receiving cavity, the speaker unit being fixed on the support arm, the speaker unit comprising a basin fixed on the support arm, a vibration system fixed on the basin, and a magnetic circuit system for driving the vibration system to vibrate, the vibration system comprising a diaphragm fixed on the basin and a voice coil for driving the diaphragm to vibrate and produce sound, the diaphragm comprising a dome located in the middle, a folding ring spaced around the dome, an inner edge connecting the dome and the folding ring, an outer edge spaced around the folding ring and fixed on the basin, and a connecting portion connecting the folding ring and the outer edge, the shell further comprising a retaining wall spaced apart from the basin, the outer edge being glued and fixed to the support arm, the connecting portion comprising a first connecting portion arranged opposite to the retaining wall, the first connecting portion being a flat plate structure perpendicular to the vibration direction.

[0007] Preferably, the diaphragm is a rounded rectangle, and the connecting portion further includes a second connecting portion located at a corner, a third connecting portion extending along the major axis and connecting two adjacent first connecting portions, and a fourth connecting portion extending along the minor axis and connecting two adjacent first connecting portions.

[0008] Preferably, the first connection portion and the outer edge are located in the same plane away from the surface of the basin frame.

[0009] Preferably, the second connecting portion, the third connecting portion and the fourth connecting portion are recessed along the vibration direction and away from the magnetic circuit system.

[0010] Preferably, the fold ring is recessed along the vibration direction and toward the magnetic circuit system.

[0011] Preferably, the width of the fold ring in a direction perpendicular to the vibration direction and parallel to the major axis or the minor axis is greater than the width of the connecting portion in a direction perpendicular to the vibration direction and parallel to the major axis or the minor axis.

[0012] Preferably, the outer edge includes a first side wall glued to the bottom of the support arm, bent and extended from the edge of the bottom close to the retaining wall in a direction parallel to the vibration direction and away from the edge portion, and a second side wall bent and extended from the connecting edge of the bottom and the first connecting portion in a direction parallel to the vibration direction and away from the edge portion.

[0013] Preferably, a height of the first side wall along the vibration direction is higher than a height of the second side wall along the vibration direction.

[0014] Compared with the related art, the speaker box provided by the present invention includes a shell having a receiving cavity and a speaker unit received in the shell, the shell includes a support arm extending toward the receiving cavity, the speaker unit is fixed on the support arm, the speaker unit includes a basin fixed on the support arm, a vibration system fixed on the basin, the vibration system includes a diaphragm fixed on the basin, the diaphragm includes a spherical top located in the middle, a folding ring spaced around the spherical top, an outer edge spaced around the folding ring and fixed on the basin, and a connecting part connecting the folding ring and the outer edge, the shell also includes a retaining wall spaced apart from the basin, the outer edge is glued and fixed to the support arm, the connecting part includes a first connecting part arranged opposite to the retaining wall, the first connecting part is a flat plate structure perpendicular to the vibration direction, which solves the problem of poor pure sound of the speaker box and thus a decrease in its acoustic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of a speaker box in one embodiment of the present invention;

[0016] Figure 2 for Figure 1 An exploded view of the speaker box in Figure 1;

[0017] Figure 3 For along Figure 1 Sectional view along line AA;

[0018] Figure 4 for Figure 3 The enlarged structural diagram of part B in the middle;

[0019] Figure 5 for Figure 1 A partial exploded view of the speaker box in Figure 1;

[0020] Figure 6 For along Figure 5 Sectional view along the midline BB;

[0021] Figure 7 is a schematic diagram of the three-dimensional structure of a diaphragm according to an embodiment of the present invention;

[0022] Figure 8 For along Figure 7 Sectional view along the CC line. DETAILED DESCRIPTION

[0023] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0025] See also Figure 1 , Figure 2 and Figure 5 The embodiment of the present invention provides a speaker box 100, which includes a housing 200 having a receiving space 201 and a speaker unit 300 received in the housing 200. Specifically, the housing 200 includes an upper housing 210, a lower housing 220, an intermediate housing 230, and a receiving space 201 formed by the upper housing 210, the lower housing 220 and the intermediate housing 230, the intermediate housing 230 includes a support arm 2301 extending toward the receiving space 201 and fixing the speaker unit 300, and the housing 200 is provided with a sound outlet 2100 connecting the receiving space 201 with the outside. The sound emitted by the speaker unit 300 is transmitted to the outside through the sound outlet 2100.

[0026] See also Figures 2 to 3 The speaker unit 300 includes a basin frame 10 fixed to the support arm 2301, a vibration system 20 fixed to the basin frame 10, a magnetic circuit system 30 driving the vibration system 20, and a flexible circuit board 40 for connecting the speaker unit 300 and an external circuit. The magnetic circuit system 30 and the vibration system 20 are fixed to the basin frame 10, and the basin frame 10 can support the magnetic circuit system 30 and the vibration system 20.

[0027] See also Figures 2 to 3 The vibration system 20 includes a diaphragm 22 fixed on the basin frame 10 and a voice coil 23 that drives the diaphragm 22 to vibrate and produce sound. An electrical signal is introduced to the voice coil 23 through the flexible circuit board 40. When the speaker unit 300 is powered on, the voice coil 23 vibrates under the action of the magnetic circuit system 30, thereby driving the diaphragm 22 to vibrate and produce sound.

[0028] See also Figures 2 to 3The magnetic circuit system 30 includes a yoke 31 fixed to the frame 10, and a main magnetic steel unit 32 and a secondary magnetic steel unit 33 fixed to the side of the yoke 31 close to the vibration system 20, and the secondary magnetic steel unit 33 is arranged around the main magnetic steel unit 32. The secondary magnetic steel unit 33 and the main magnetic steel unit 32 together form a magnetic gap 301, and the voice coil 23 is suspended in the magnetic gap 301. The magnetic circuit system 30 also includes a main pole core 34 located above the main magnetic steel unit 32 and a secondary pole core 35 located above the secondary magnetic steel unit 33, and the secondary pole core 35 is fixed to the frame 10.

[0029] See also Figures 2 to 8 The middle shell 230 further includes a retaining wall 2302 which is spaced from the basin frame 10 and is located on the support arm 2301. The diaphragm 22 includes a dome 221 located in the middle, a folding ring 222 which surrounds and spaces around the dome 221, an inner edge 223 which connects the dome 221 and the folding ring, an outer edge 224 which surrounds and spaces around the folding ring 222, and a connecting portion 225 which connects the folding ring 222 and the outer edge 224, wherein the outer edge 224 is sandwiched between the support arm 2301 and the basin frame 10. Specifically, the diaphragm 22 is a rounded rectangular structure, and the connecting portion 225 includes a first connecting portion 2251 which is opposite to the retaining wall 2302, a second connecting portion 2252 which is located at a corner, a third connecting portion 2253 which is along the long axis and connects two adjacent first connecting portions 2251, and a fourth connecting portion 2254 which is along the short axis and connects two adjacent first connecting portions 2251. The material of the diaphragm 22 of the present embodiment may be a polymer material, specifically, may be silicone, rubber, PEEK material or TPU material.

[0030] See also Figures 2 to 7 In this embodiment, the folding ring 222 is an arc shape that is concave along the vibration direction and toward the magnetic circuit system 30. At the same time, the width of the folding ring 222 perpendicular to the vibration direction and away from the outer edge 224 is greater than the width of the connecting portion 225 perpendicular to the vibration direction and away from the outer edge 224. In this embodiment, the folding ring 222 and the ball top 221 are mutually matched connection structures. In other embodiments, the folding ring 222 and the ball top 221 can form an integrated structure.

[0031] See also Figures 4 to 8Specifically, the second connection part 2252, the third connection part 2253 and the fourth connection part 2254 are recessed along the vibration direction and away from the magnetic circuit system 30. The retaining wall 2302 on the support arm 2301 is used to position the speaker unit 300. When the diaphragm 22 is glued and fixed to the support arm 2301 with the retaining wall 2302, even if the gap between the retaining wall 2302 and the first side wall 2242 of the outer edge 224 of the diaphragm 22 is small, glue will overflow to the first connection part 2251 of the diaphragm 22. However, in the present invention, by setting the structure of the first connection part 2251 to a flat plate structure perpendicular to the vibration direction, the problem of poor pure sound of the speaker box 100 in the prior art is effectively avoided, thereby improving the acoustic performance.

[0032] See also Figure 4 The outer edge 224 includes a bottom 2241 glued to the support arm 2301, a first side wall 2242 extending from the edge of the bottom 2241 close to the retaining wall 2302 in a direction parallel to the vibration direction and away from the bottom 2241, and a second side wall 2243 extending from the connecting edge of the bottom 2241 and the first connecting portion 2251 in a direction parallel to the vibration direction and away from the bottom 2241. In this embodiment, the height of the first side wall 2242 is higher than the height of the second side wall 2243. In other embodiments, the height of the first side wall 2242 may also be lower than or equal to the height of the second side wall 2243.

[0033] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A speaker box, comprising a shell having a receiving cavity and a speaker unit received in the shell, the shell comprising a support arm extending toward the receiving cavity, the speaker unit being fixed on the support arm, the speaker unit comprising a basin fixed on the support arm, a vibration system fixed on the basin, and a magnetic circuit system for driving the vibration system to vibrate, the vibration system comprising a diaphragm fixed on the basin and a voice coil for driving the diaphragm to vibrate and produce sound, the diaphragm comprising a dome located in the middle, a folding ring spaced around the dome, an inner edge connecting the dome and the folding ring, an outer edge spaced around the folding ring and fixed on the basin, and a connecting portion connecting the folding ring and the outer edge, characterized in that: The shell also includes a retaining wall spaced apart from the basin frame, the outer edge is glued and fixed to the support arm, the support arm, the outer edge and the basin frame are stacked in sequence along the vibration direction, the connecting part includes a first connecting part arranged opposite to the retaining wall, the first connecting part is a flat plate structure perpendicular to the vibration direction, the diaphragm is a rounded rectangle, the connecting part also includes a second connecting part located at the corner position, a third connecting part extending along the long axis and connecting two adjacent first connecting parts, and a fourth connecting part extending along the short axis and connecting two adjacent first connecting parts, the second connecting part, the third connecting part and the fourth connecting part are recessed along the vibration direction and away from the magnetic circuit system.

2. The speaker box according to claim 1, characterized in that: The first connection portion and a surface of the outer edge away from the basin frame are located in the same plane.

3. The speaker box according to claim 1, characterized in that: The folding ring is recessed along the vibration direction and toward the magnetic circuit system.

4. The speaker box according to claim 1, characterized in that: The width of the folding ring in a direction perpendicular to the vibration direction and parallel to the long axis or the short axis is greater than the width of the connecting portion in a direction perpendicular to the vibration direction and parallel to the long axis or the short axis.

5. The speaker box according to claim 1, characterized in that: The outer edge includes a bottom portion of the support arm glued thereto, a first side wall bent and extended from an edge of the bottom close to the retaining wall in a direction parallel to the vibration direction and away from the bottom, and a second side wall bent and extended from a connecting edge of the bottom and the first connecting portion in a direction parallel to the vibration direction and away from the bottom.

6. The speaker box according to claim 5, characterized in that: A height of the first side wall along the vibration direction is higher than a height of the second side wall along the vibration direction.

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