Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a frame, a U iron, a central magnetic structure and an annular magnetic structure, and is characterized in that the enclosure wall of the U iron is connected with the frame; the central magnetic structure is arranged on the U iron; the annular magnetic structure surrounds the central magnetic structure and is arranged on the U iron, a low-pitch magnetic gap is formed between the enclosure wall of the U iron and the annular magnetic structure, a high-pitch magnetic gap is formed between the annular magnetic structure and the central magnetic structure, and the lower part of the inner side wall of the annular magnetic structure is provided with an expansion cavity communicated with the high-pitch magnetic gap. The sounding unit is novel and small in structure, the high-pitch system is located in the middle of the low-pitch system, and magnetic energy product utilization is maximized by utilizing a low-pitch magnetic circuit saturation area; the high-pitch system and the low-pitch system are designed in a non-common-cavity mode, the high-pitch system and the low-pitch system do not interfere with each other, an independent back cavity of the high-pitch system is enlarged through the arrangement of the expansion cavity, F0 is reduced, the high-frequency effective bandwidth is improved, and the performance of the sound production unit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a sound generating unit. Background Art

[0002] Nowadays, mobile terminals such as mobile phones and tablets are enriching people's lives, and electroacoustic converters play an indispensable role as audio devices.

[0003] As consumers have higher and higher requirements for the sound quality and loudness of the whole machine, the requirements for the sound unit are also further improved. In order to achieve a better experience, multiple sound units are often placed in a speaker, including a woofer, a midrange unit and a tweeter. The filter can filter out the redundant frequency bands to retain the desired effective bandwidth. Although the sound quality has improved, the volume of the speaker has also increased and become bulky, and the cost has also increased. Based on this, coaxial high and low frequency sound units have appeared on the market. In this sound unit, the woofer system is arranged around the tweeter system. In order to avoid the influence of the woofer system on the tweeter system, the tweeter system has an independent back cavity based on the tweeter magnetic gap. However, in the existing technology, the total volume of the back cavity of the tweeter system is relatively small, resulting in a particularly high F0, so that the performance of the sound unit is poor. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance high-bass coaxial sound unit.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a sound unit comprising:

[0006] basin rack;

[0007] U-iron, the walls of the U-iron are connected to the basin frame;

[0008] A central magnetic structure, the central magnetic structure is provided on the U iron;

[0009] An annular magnetic structure is provided on the U iron around the central magnetic structure, a bass magnetic gap is formed between the surrounding wall of the U iron and the annular magnetic structure, a treble magnetic gap is formed between the annular magnetic structure and the central magnetic structure, and an expansion cavity connected to the treble magnetic gap is provided at the lower part of the inner side wall of the annular magnetic structure.

[0010] In one embodiment, there are multiple expansion cavities, and the multiple expansion cavities are divided into at least one group. Each group includes two expansion cavities arranged opposite to each other, and the central magnetic structure is located between the two expansion cavities in the same group.

[0011] In one embodiment, the two expansion chambers in the same group are symmetrically arranged.

[0012] In one embodiment, the annular magnetic structure includes an annular magnetic steel and an annular washer, the annular magnetic steel connects the annular washer and the U iron, and the expansion cavity is provided on the annular magnetic steel.

[0013] In one embodiment, the expansion cavity is connected to the bottom surface of the annular magnetic steel.

[0014] In one embodiment, the expansion cavity is connected to the top surface of the annular magnetic steel.

[0015] In one embodiment, it also includes a tweeter vibration component, a support frame and a bass vibration component, the tweeter vibration component includes a connected tweeter diaphragm component and a tweeter voice coil, the tweeter diaphragm component is connected to the annular magnetic structure, and the tweeter voice coil is set corresponding to the tweeter magnetic gap; the support frame is set on the top of the annular magnetic structure, the support frame has an extended edge extending inward, and at least part of the extended edge extends to the top of the tweeter diaphragm component; the bass vibration component includes a connected bass diaphragm component and a bass voice coil, the bass diaphragm component is in the shape of a ring frame as a whole, the inner edge of the bass diaphragm assembly is connected to the extended edge, the outer edge of the bass diaphragm assembly is connected to the basin frame, and the bass voice coil is set corresponding to the bass magnetic gap.

[0016] In one embodiment, the tweeter diaphragm assembly includes a tweeter diaphragm, and the tweeter diaphragm includes a tweeter inner fixed part, a tweeter folding ring part and a tweeter outer fixed part connected in sequence from the inside to the outside, the tweeter outer fixed part is connected to the annular magnetic structure, and at least a portion of the extended edge is located directly above the tweeter folding ring part.

[0017] In one embodiment, a portion of the extended edge extends to directly above the tweeter inner fixing portion.

[0018] In one embodiment, the support frame includes a vertical wall, the top end of the vertical wall is bent and extended inward to form the extended edge, the bass diaphragm assembly includes a bass diaphragm, and the bass diaphragm includes a bass inner fixed part, an inner folding ring part, a connecting part, an outer folding ring part and a bass outer fixed part connected in sequence from the inside to the outside, the bass outer fixed part is connected to the basin frame, the bass inner fixed part is connected to the extended edge, and the connection between the bass inner fixed part and the extended edge is arranged away from the vertical wall.

[0019] The beneficial effects of the present invention are: the sound unit has a novel and compact structure, the treble system is located in the middle of the woofer system, and the saturation area of the woofer magnetic circuit is utilized to maximize the utilization of the magnetic energy product; the treble system and the woofer system are designed to have non-common cavities, and the treble system and the woofer system will not interfere with each other. By setting the expansion cavity, the independent back cavity of the treble system is increased, which is conducive to reducing F0, improving the effective bandwidth of high frequencies, and improving the performance of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0021] Figure 1 This is a cross-sectional view of the sound unit of the first embodiment of the present invention. Figure 1 ;

[0022] Figure 2 This is a cross-sectional view of the sound unit of the first embodiment of the present invention. Figure 2 ;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0024] Description of Figure Numbers:

[0025] 1. Basin rack;

[0026] 2. U iron; 21. surrounding wall; 22. through hole; 23. receiving slot;

[0027] 3. Central magnetic structure;

[0028] 4. Ring magnetic structure; 41. Ring magnetic steel; 42. Ring washer; 43. Expansion cavity;

[0029] 51. Tweeter diaphragm assembly; 511. Tweeter inner fixing portion; 512. Tweeter surround; 513. Tweeter outer fixing portion; 52. Tweeter voice coil;

[0030] 6. Support frame; 61. Vertical wall; 62. Extended edge; 621. Bend portion; 622. Inner edge; 623. Outer edge;

[0031] 71. Bass diaphragm assembly; 711. Bass inner fixing portion; 712. Inner folding ring portion; 713. Connecting portion; 714. Outer folding ring portion; 715. Bass outer fixing portion; 72. Bass voice coil;

[0032] 8. Breathable partition. DETAILED DESCRIPTION

[0033] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0034] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if the embodiments of the present invention include descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0037] In addition, if the word "and / or" appears throughout the text, it means that three parallel solutions are included. For example, "and / or" includes solutions, or solutions, or solutions that meet all of the requirements simultaneously. In addition, the technical solutions of various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. If the combination of technical solutions is mutually contradictory or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0038] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0039] Example 1

[0040] Please refer to Figures 1 to 3, the first embodiment of the present invention is: a sound unit, including a basin 1, a U iron 2, a central magnetic structure 3, an annular magnetic structure 4, a treble vibration component, a support frame 6 and a bass vibration component, the surrounding wall 21 of the U iron 2 is connected to the basin 1, the central magnetic structure 3 is arranged on the U iron 2, the annular magnetic structure 4 is arranged on the U iron 2 around the central magnetic structure 3, a treble magnetic gap is formed between the annular magnetic structure 4 and the central magnetic structure 3, and a woofer magnetic gap is formed between the surrounding wall 21 of the U iron 2 and the annular magnetic structure 4; the treble vibration component includes a connected treble diaphragm component 51 and a treble voice coil 52, the treble diaphragm component 51 is connected to the annular magnetic structure 4, and the tweeter voice coil 52 is arranged corresponding to the tweeter magnetic gap; the support frame 6 is arranged on the top of the annular magnetic structure 4, and the support frame 6 has an inwardly extending extension edge 62, and at least part of the extension edge 62 extends to the top of the tweeter diaphragm assembly 51; the bass vibration assembly includes a connected bass diaphragm assembly 71 and a bass voice coil 72, and the bass diaphragm assembly 71 is in the shape of a ring frame as a whole, the inner edge of the bass diaphragm assembly 71 is connected to the extension edge 62, and the outer edge of the bass diaphragm assembly 71 is connected to the basin frame 1, and the bass voice coil 72 is arranged corresponding to the bass magnetic gap.

[0041] The setting of the support frame 6 allows the inner edge of the bass diaphragm assembly 71 to extend to the top of the tweeter diaphragm assembly 51, increasing the bass compliance by staggering, thereby increasing the low-frequency response bandwidth, and effectively improving the bass performance of the sound unit.

[0042] The central magnetic structure 3 includes a central magnetic steel and a central washer, the central magnetic steel connects the central washer and the U iron 2, the annular magnetic structure 4 includes an annular magnetic steel 41 and an annular washer 42, the annular magnetic steel 41 connects the U iron 2 and the annular washer 42, the annular washer 42 is aligned or roughly aligned with the central washer, the support frame 6 is directly or indirectly connected to the annular washer 42, and the tweeter diaphragm assembly 51 is directly or indirectly connected to the annular washer 42.

[0043] Specifically, the tweeter diaphragm assembly 51 includes a tweeter diaphragm, which includes a tweeter inner fixing portion 511, a tweeter folding portion 512, and a tweeter outer fixing portion 513, which are sequentially connected from the inside to the outside. The tweeter outer fixing portion 513 is connected to the annular magnetic structure 4, and at least a portion of the extended edge 62 is located directly above the tweeter folding portion 512. Optionally, the tweeter diaphragm assembly 51 also includes a tweeter dome, which is provided on the tweeter inner fixing portion 511.

[0044] The support frame 6 is in the shape of a ring frame as a whole, and serves to separate the upper space of the tweeter diaphragm assembly 51 from the inner space of the woofer diaphragm assembly 71, so that the tweeter system and the woofer system can be independent of each other.

[0045] The support frame 6 includes a vertical wall 61, the top of the vertical wall 61 is bent and extended inward to form the extended edge 62, the bass diaphragm assembly 71 includes a bass diaphragm, and the bass diaphragm includes a bass inner fixing part 711, an inner folding ring part 712, a connecting part 713, an outer folding ring part 714 and a bass outer fixing part 715 connected in sequence from the inside to the outside, the bass outer fixing part 715 is connected to the basin frame 1, the bass inner fixing part 711 is connected to the extended edge 62, and the connection between the bass inner fixing part 711 and the extended edge 62 is set away from the vertical wall 61.

[0046] As a preferred embodiment, part of the extension edge 62 extends to directly above the tweeter inner fixing portion 511, so that the cross-sectional arc length of the inner folding ring portion 712 can be set longer, thereby improving the bass compliance to a greater extent.

[0047] In this embodiment, the extended edge 62 has a bent portion 621, which divides the extended edge 62 into an inner edge 622 and an outer edge 623. The outer edge 623 is connected to the vertical wall 61. The top surface of the inner edge 622 is higher than the top surface of the outer edge 623. The bass inner fixing portion 711 is connected to the top surface of the inner edge 622. The top surface of the inner edge 622 is higher than the top surface of the outer edge 623 to provide a larger deformation space for the inner folding ring portion 712, thereby preventing the inner folding ring portion 712 from colliding with the extended edge 62 during vibration of the bass diaphragm assembly 71 and generating noise.

[0048] The bass diaphragm assembly 71 further includes a bass dome, which is in the shape of a ring frame as a whole and is connected to the connecting portion 713 .

[0049] The U iron 2 is provided with a through hole 22 connected to the tweeter magnetic gap. To facilitate the processing of the U iron 2, the U iron 2 is provided with a breathable partition 8, and the breathable partition 8 is provided with multiple breathable holes connected to the through hole 22.

[0050] Optionally, the bottom surface of the U-iron 2 is provided with a receiving groove 23 for receiving at least a portion of the air-permeable baffle 8. In this embodiment, the depth of the receiving groove 23 is greater than or equal to the thickness of the air-permeable baffle 8, so that most or all of the air-permeable baffle 8 is located in the receiving groove 23, thereby reducing the cross-sectional height of the sound unit and keeping the sound unit compact.

[0051] A capacity expansion cavity 43 communicating with the tweeter magnetic gap is provided at the lower portion of the inner side wall of the annular magnetic structure 4 .

[0052] There are multiple expansion cavities 43, and the multiple expansion cavities 43 are divided into at least one group. Each group includes two expansion cavities 43 arranged opposite to each other. The central magnetic structure 3 is located between the two expansion cavities 43 in the same group. In order to make the tweeter magnetic gap structure symmetrical, the two expansion cavities 43 in the same group are symmetrically arranged.

[0053] In detail, the expansion cavity 43 is provided on the annular magnetic steel 41 , and the expansion cavity 43 is connected to the bottom surface and / or top surface of the annular magnetic steel 41 . In this embodiment, the expansion cavity 43 is connected to the bottom surface and the top surface of the annular magnetic steel 41 .

[0054] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound unit, characterized in that: include basin rack; U-iron, the walls of the U-iron are connected to the basin frame; A central magnetic structure, the central magnetic structure is provided on the U iron; An annular magnetic structure is provided on the U iron around the central magnetic structure, a bass magnetic gap is formed between the surrounding wall of the U iron and the annular magnetic structure, a treble magnetic gap is formed between the annular magnetic structure and the central magnetic structure, and an expansion cavity connected to the treble magnetic gap is provided at the lower part of the inner side wall of the annular magnetic structure.

2. The sound unit according to claim 1, characterized in that: There are multiple expansion cavities, and the multiple expansion cavities are divided into at least one group. Each group includes two expansion cavities arranged opposite to each other, and the central magnetic structure is located between the two expansion cavities in the same group.

3. The sound unit according to claim 2, characterized in that: The two expansion cavities in the same group are symmetrically arranged.

4. The sound unit according to claim 1, wherein: The annular magnetic structure includes an annular magnetic steel and an annular washer. The annular magnetic steel connects the annular washer and the U iron. The expansion cavity is provided on the annular magnetic steel.

5. The sound unit according to claim 4, characterized in that: The expansion cavity is connected to the bottom surface of the annular magnetic steel.

6. The sound unit according to claim 4, characterized in that: The expansion cavity is connected to the top surface of the annular magnetic steel.

7. The sound unit according to claim 1, characterized in that: It also includes a tweeter vibration component, a support frame and a bass vibration component, the tweeter vibration component includes a connected tweeter diaphragm component and a tweeter voice coil, the tweeter diaphragm component is connected to the annular magnetic structure, and the tweeter voice coil is set corresponding to the tweeter magnetic gap; the support frame is set on the top of the annular magnetic structure, the support frame has an extended edge extending inward, and at least part of the extended edge extends to the top of the tweeter diaphragm component; the bass vibration component includes a connected bass diaphragm component and a bass voice coil, the bass diaphragm component is in the shape of a ring frame as a whole, the inner edge of the bass diaphragm assembly is connected to the extended edge, the outer edge of the bass diaphragm assembly is connected to the basin frame, and the bass voice coil is set corresponding to the bass magnetic gap.

8. The sound unit according to claim 7, characterized in that: The tweeter diaphragm assembly includes a tweeter diaphragm, and the tweeter diaphragm includes a tweeter inner fixed part, a tweeter folding ring part and a tweeter outer fixed part connected in sequence from the inside to the outside. The tweeter outer fixed part is connected to the annular magnetic structure, and at least a portion of the extended edge is located directly above the tweeter folding ring part.

9. The sound unit according to claim 8, characterized in that: Part of the extension edge extends to right above the tweeter inner fixing portion.

10. The sound unit according to claim 7, characterized in that: The support frame includes a vertical wall, the top end of the vertical wall is bent inward and extended to form the extended edge, the bass diaphragm assembly includes a bass diaphragm, and the bass diaphragm includes a bass inner fixing part, an inner folding ring part, a connecting part, an outer folding ring part and a bass outer fixing part connected in sequence from the inside to the outside, the bass outer fixing part is connected to the basin frame, the bass inner fixing part is connected to the extended edge, and the connection between the bass inner fixing part and the extended edge is arranged away from the vertical wall.

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