Speaker box

Abstract

The present invention provides a speaker box. [Solution] The speaker box includes a case, a vibration system, and a magnetic circuit system. The vibration system includes a first diaphragm, a voice coil fixed to the first diaphragm, and a voice coil bobbin supporting the voice coil. The voice coil bobbin includes a flat plate portion fixed to the first diaphragm and having a ring shape, a first support portion extending and bending from the inner edge of the flat plate portion and suspending the voice coil in the magnetic gap, and a second support portion extending and bending from the outer edge of the flat plate portion. The vibration system further includes a steel ring fixed to the case and arranged around the outside of the second support portion, and a second diaphragm connecting the steel ring and the second support portion, and the steel ring, the second diaphragm and the voice coil bobbin are molded integrally. By integrally forming the steel ring with the second diaphragm and the voice coil bobbin, not only can the assembly process be reduced and the assembly complexity be reduced, but also the adhesive can be effectively prevented from overflowing onto the second diaphragm, the reliability of the second diaphragm can be enhanced, and the acoustic performance of the speaker box can be effectively improved.

Description

[Technical field]

[0001] The present invention relates to a sound generating device, and in particular to a speaker box applied in the field of portable electronic products. [Background technology]

[0002] With the rapid development of science and technology, the penetration rate of audio equipment is becoming higher and higher, and the enjoyment of high-quality music is gradually popularized among the masses in many entertainment ways. In audio equipment, the speaker box is a commonly used electronic element device, which is mainly used for reproducing audio signals.

[0003] The vibration system of the speaker box in the prior art generally includes a first diaphragm for sound generation, a voice coil fixed to the first diaphragm, a voice coil bobbin supporting the voice coil, a second diaphragm fixed to one end of the voice coil away from the first diaphragm, and an FPC fixed to the second diaphragm and supplying power to the voice coil. However, in the prior art, the vibration system in the speaker box has a large number of components, and the assembly process is complicated. In addition, during assembly, the FPC is generally glued and fixed to the second diaphragm, which requires a wide adhesive area, and the adhesive is easily overflowed onto the second diaphragm during adhesion, which reduces its reliability.

[0004] Therefore, in order to solve the above technical problems, it is necessary to provide a new speaker box. Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above problems, the present invention aims to provide a speaker box with stable vibration performance. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a speaker box, the speaker box including a case having an accommodation space, and a magnetic circuit system having a vibration system and a magnetic gap accommodated in the accommodation space, the magnetic circuit system including a yoke fixed to the case and a main magnet steel fixed to the yoke, the vibration system including a first diaphragm fixed to the case, and a voice coil fixed to the first diaphragm and inserted in the magnetic gap, the vibration system including a voice coil fixed to a side of the first diaphragm facing the magnetic circuit system, The voice coil bobbin further includes a voice coil bobbin that includes a flat plate portion fixed to the first diaphragm and having a ring shape, a first support portion that bends and extends from an inner edge of the flat plate portion and suspends the voice coil within the magnetic gap, and a second support portion that bends and extends from an outer edge of the flat plate portion, and the vibration system further includes a steel ring that is fixed to the case and is arranged around the outside of the second support portion, and a second diaphragm that connects the steel ring to one end of the second support portion that is away from the first diaphragm, and the steel ring, the second diaphragm, and the voice coil bobbin are molded integrally.

[0007] Preferably, an inner edge of the second diaphragm is fixed to an end of the second support part remote from the first diaphragm, and an outer edge of the second diaphragm is fixed to the steel ring.

[0008] Preferably, the speaker box further includes an FPC for electrically connecting the voice coil to an external circuit, the FPC being fixed to a surface of the steel ring facing the first diaphragm.

[0009] Preferably, the steel ring includes a first horizontal portion fixed to the case and a first folded portion extending from an inner edge of the first horizontal portion in a direction away from the first diaphragm, the outer edge of the second diaphragm being fixed to the first folded portion, and the FPC being fixed to a surface of the first horizontal portion facing the first diaphragm.

[0010] Preferably, the FPC includes a first elastic portion fixed to the steel ring, a second elastic portion spaced apart from the first elastic portion, a first electrical connection portion extending from the first elastic portion, and a second electrical connection portion extending from the second elastic portion, the first electrical connection portion being electrically connected to an external circuit and the second electrical connection portion being electrically connected to the voice coil.

[0011] Preferably, a first communication hole is provided in the second support portion of the voice coil bobbin, and the second electrical connection portion extends from the second elastic portion and passes through the first communication hole to be electrically connected to the voice coil.

[0012] Preferably, the first diaphragm includes an intermediate diaphragm located at a central position, a dome surrounding the intermediate diaphragm, and a side diaphragm surrounding the dome, the side diaphragm being fixed to the case, and the flat portion of the voice coil bobbin being fixed to a surface of the dome facing the voice coil.

[0013] Preferably, the magnetic circuit system further includes a side magnet steel spaced apart from the main magnet steel to form the magnetic gap, and the intermediate diaphragm is fixed to a surface of the main magnet steel away from the yoke.

[0014] Preferably, the case has a rectangular shape, and the second diaphragm is provided along a minor axis direction of the case.

[0015] Preferably, the steel ring, the second diaphragm and the voice coil bobbin are integrally hot-press molded. Effect of the Invention

[0016] Compared with the prior art, the second diaphragm, the steel ring and the voice coil bobbin of the speaker box of the present invention are integrally hot-pressed as a single single component and are moved around throughout the assembly process, which not only reduces the assembly process and reduces the complexity of the assembly, but also effectively prevents the adhesive from overflowing onto the second diaphragm, enhances the reliability of the second diaphragm, and effectively improves the acoustic performance of the speaker box. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing a speaker box according to the present invention. [Diagram 2] FIG. 2 is an exploded view showing the speaker box according to the present invention. [Diagram 3] FIG. 3 is a cross-sectional view taken along line AA of FIG. [Figure 4] FIG. 4 is an enlarged view of part B in FIG. [Diagram 5] FIG. 5 is an enlarged view of part C in FIG. [Figure 6] FIG. 6 is a perspective view of a combination of a steel ring, a second diaphragm, and a voice coil bobbin of a speaker box according to the present invention. [Figure 7] FIG. 7 is a perspective view of a combination of a steel ring, an FPC, a voice coil bobbin and a voice coil of a speaker box according to the present invention. [Figure 8] FIG. 8 is another combination perspective view of the steel ring, the FPC, the voice coil bobbin and the voice coil of the speaker box according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions of the present invention will be described clearly and completely below with reference to the drawings and specific embodiments.

[0019] As shown in Figures 1 to 8, the present invention provides a speaker box 100, which includes a case 1 having an accommodation space 10, and a magnetic circuit system 2 and a vibration system 3 accommodated in the accommodation space 10.

[0020] The case 1 includes a bottom wall 11, a side wall 12 that bends and extends from the bottom wall 11, and an upper cover 13 that is arranged to cover the side wall 12, and the bottom wall 11, the side wall 12 and the upper cover 13 together form the storage space 10. Specifically, the upper cover 13 is provided with a sound emission hole 131, and the sound emitted from the vibration system 2 is transmitted to the outside world through the sound emission hole 131.

[0021] The magnetic circuit system 2 includes a yoke 21 fixed to the bottom wall 11, a main magnet steel 22 located at the central position of the yoke 21, and a side magnet steel 24 spaced apart from the main magnet steel 22 to form a magnetic gap 23. In this embodiment, there are four side magnet steels 24, and the four side magnet steels 24 are distributed in a ring shape around the periphery of the main magnet steel 22. In order to improve the magnetic field performance of the magnetic circuit system 2, a main magnetic pole core 25 is provided on a surface of the main magnet steel 22 away from the yoke 21, a top magnet steel 26 is provided on a surface of the main magnet steel 25 away from the main magnet steel 22, and a sub-pole core 27 is also provided on a surface of the side magnet steel 24 away from the yoke 21.

[0022] The vibration system 3 includes a first diaphragm 31 fixed to the upper cover 13, a voice coil 32 fixed to the first diaphragm 31, a voice coil bobbin 33 fixed to the side of the first diaphragm 31 facing the magnetic circuit system 2, a second diaphragm 34 provided opposite the first diaphragm 31, and a steel ring 35 fixing the second diaphragm 34 to the side wall 12, and the voice coil 32 is suspended in the magnetic gap 23 via the voice coil bobbin 33.

[0023] 2 to 6, the voice coil bobbin 33 includes a flat plate portion 331 fixed to the first diaphragm 31 and having a ring shape, a first support portion 332 extending from an inner edge of the flat plate portion 331 and suspending the voice coil 32 in the magnetic gap 23, and a second support portion 333 extending from an outer edge of the flat plate portion 331, the steel ring 35 is provided around the outside of the second support portion 333, and the second diaphragm 34 connects the steel ring 35 and one end of the second support portion 333 away from the first diaphragm 31. Furthermore, the inner edge of the second diaphragm 34 is fixed to one end of the second support portion 333 away from the first diaphragm 31, and the outer edge of the second diaphragm 34 is fixed to the steel ring 35. In the present invention, the steel ring 35, the second diaphragm 34 and the voice coil bobbin 33 are integrally hot-pressed, and in the process of assembling the speaker box 100, the steel ring 35, the second diaphragm 34 and the voice coil bobbin 33 are integrally hot-pressed as a single, independent member and are moved throughout the assembly process, which not only reduces the assembly process and reduces the complexity of the assembly, but also avoids the technical problem of adhesive overflowing onto the second diaphragm when adhesively applying and bonding the second diaphragm to the FPC in the conventional technology, thereby enhancing the reliability of the second diaphragm and effectively improving the acoustic performance of the speaker box.

[0024] Furthermore, as shown in FIG. 4, the steel ring 35 includes a first horizontal portion 351 fixed to the side wall 12, and a first bent portion 352 that bends and extends from an inner edge of the first horizontal portion 351 in a direction away from the first diaphragm 31, and the outer edge of the second diaphragm 34 is fixed to the first bent portion 352. As can be seen from this, the first bent portion 352 extends in the vibration direction. Compared to the conventional technology, by fixing the second diaphragm 34 to the first bent portion 352 of the steel ring 35, the width of the lateral bond can be reduced and good bonding strength can be ensured. In this embodiment, both the case 1 and the voice coil 32 are rectangular, and correspondingly, the flat portion 331 of the voice coil bobbin 33 is also ring-shaped, and there are two second diaphragms 34, each of which is arranged along the short axis direction of the case 1, and correspondingly, the second support portion 333 extends along the short axis direction of the flat portion 331.

[0025] In order to supply power to the voice coil 32, the speaker box 100 further includes an FPC (flexible circuit board) 4 that electrically connects the voice coil 32 to an external circuit, and the FPC 4 is fixed to the surface of the first horizontal portion 351 facing the first diaphragm 31. Specifically, the FPC 4 includes a first elastic portion 41 fixed to the steel ring 35, a second elastic portion 42 spaced apart from the first elastic portion 41, a first electrical connection portion 43 extending from the first elastic portion 41, and a second electrical connection portion 44 extending from the second elastic portion 42, and the first electrical connection portion 43 is electrically connected to an external circuit and the second electrical connection portion 44 is electrically connected to the voice coil 32. In the present invention, the first elastic portion 41 of the FPC 4 is fixed to the first horizontal portion 351 of the steel ring 35, and there is no need to adhesively connect the second diaphragm to the FPC again, effectively ensuring the adhesive area between the steel ring and the FPC, strengthening the bonding strength, and improving the smoothness of vibration. As can be seen, there are two FPCs 4, and the two FPCs 4 are provided corresponding to the second diaphragm 34, and in this embodiment, only one FPC 4 is provided with the first electrical connection portion 43 and the second electrical connection portion 44.

[0026] 4 to 8, in order to easily connect the voice coil 32 and the FPC 4, a first communication hole 3331 is provided in the second support portion 333 of the voice coil bobbin 33, the first communication hole 3331 extends from the second support portion 333 to the flat plate portion 331, and the second electrical connection portion 44 extends from the second elastic portion 42 and penetrates the first communication hole 3331 to be electrically connected to the voice coil 32. In addition, the first electrical connection portion 43 penetrates a notch in the side wall 12 to extend to the outside.

[0027] Further, the first diaphragm 31 includes an intermediate diaphragm 311 located at a central position, a dome 312 surrounding the intermediate diaphragm 311, and a side diaphragm 313 surrounding the dome 312, the side diaphragm 313 being fixed to the side wall 12 of the case 1, and the flat plate portion 331 of the voice coil bobbin 33 being fixed to a surface of the dome 312 facing the voice coil 32. The intermediate diaphragm 311 is fixed to a surface of the top magnet steel 26 away from the yoke 21.

[0028] Furthermore, the speaker box 100 further includes a three-dimensional mesh structure 5 housed within the case 1, the three-dimensional mesh structure 5 being annular, one end of the three-dimensional mesh structure 5 being surrounding the side magnet steel 24 and the other end being fixed to the 11, and the three-dimensional mesh structure 5, together with the magnetic circuit system 2 and the bottom wall 11, surrounding a chamber for filling with sound-absorbing material.

[0029] Compared with the prior art, the second diaphragm, the steel ring and the voice coil bobbin of the speaker box of the present invention are integrally hot-pressed as a single single component and are moved around throughout the assembly process, which not only reduces the assembly process and reduces the complexity of the assembly, but also effectively prevents the adhesive from overflowing onto the second diaphragm, enhances the reliability of the second diaphragm, and effectively improves the acoustic performance of the speaker box.

[0030] The above is merely an embodiment of the present invention, and it should be noted here that those skilled in the art may make modifications without departing from the creative idea of ​​the present invention, and all such modifications are within the scope of protection of the present invention.

Claims

1. A speaker box comprising: a case having an accommodation space; and a magnetic circuit system accommodated in the accommodation space, the magnetic circuit system having a vibration system and a magnetic gap, the magnetic circuit system including a yoke fixed to the case and a main magnet steel fixed to the yoke, the vibration system including a first diaphragm fixed to the case, and a voice coil fixed to the first diaphragm and inserted in the magnetic gap, the vibration system further includes a voice coil bobbin fixed to a side of the first diaphragm facing the magnetic circuit system, the voice coil bobbin includes a flat plate portion fixed to the first diaphragm and having a ring shape, a first support portion extending from an inner edge of the flat plate portion and bending to suspend the voice coil in the magnetic gap, and a second support portion extending from an outer edge of the flat plate portion, the vibration system further includes a steel ring fixed to the case and provided around the outside of the second support portion, and a second diaphragm connecting the steel ring to one end of the second support portion away from the first diaphragm, the steel ring, the second diaphragm, and the voice coil bobbin are integrally molded. A speaker box characterized by:

2. An inner edge of the second diaphragm is fixed to one end of the second support part away from the first diaphragm, and an outer edge of the second diaphragm is fixed to the steel ring.

2. The speaker box according to claim 1 .

3. The speaker box further includes an FPC that electrically connects the voice coil to an external circuit, the FPC being fixed to a surface of the steel ring facing the first diaphragm.

2. The speaker box according to claim 1 .

4. The steel ring includes a first horizontal portion fixed to the case, and a first bent portion that bends and extends from an inner edge of the first horizontal portion in a direction away from the first diaphragm, an outer edge of the second diaphragm is fixed to the first bent portion, and the FPC is fixed to a surface of the first horizontal portion facing the first diaphragm.

4. The speaker box according to claim 3.

5. the FPC includes a first elastic portion fixed to the steel ring, a second elastic portion spaced apart from the first elastic portion, a first electrical connection portion extending from the first elastic portion, and a second electrical connection portion extending from the second elastic portion, the first electrical connection portion being electrically connected to an external circuit, and the second electrical connection portion being electrically connected to the voice coil; 5. The speaker box according to claim 4.

6. a first communication hole is provided in the second support portion of the voice coil bobbin, and the second electrical connection portion extends from the second elastic portion and passes through the first communication hole to be electrically connected to the voice coil; 6. The speaker box according to claim 5.

7. the first diaphragm includes an intermediate diaphragm located at a central position, a dome surrounding the intermediate diaphragm, and a side diaphragm surrounding the dome, the side diaphragm being fixed to the case, and the flat plate portion of the voice coil bobbin being fixed to a surface of the dome facing the voice coil, 7. The speaker box according to claim 6.

8. the magnetic circuit system further includes a side magnet steel spaced apart from the main magnet steel to form the magnetic gap, and the intermediate diaphragm is fixed to a surface of the main magnet steel that is away from the yoke.

8. The speaker box according to claim 7.

9. The case has a rectangular shape, and the second diaphragm is provided along a minor axis direction of the case.

9. The speaker box according to claim 8.

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