Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a yoke, an outer ring magnetic steel, two basin stands and two magnetic circuit assemblies, the two basin stands are arranged up and down at an interval, and a gap is formed between the two basin stands; the yoke comprises a flat plate part and vertical plate parts, the four sides of the flat plate part are connected with the vertical plate parts respectively, the middle areas of the vertical plate parts are connected with the flat plate part, through holes are formed in the flat plate part, the upper portion of each vertical plate part is connected with one basin stand, and the lower portion of each vertical plate part is connected with the other basin stand; the top surface and the bottom surface of the flat plate part are respectively provided with a magnetic circuit assembly, the magnetic circuit assembly comprises a central magnetic structure and an annular magnetic structure, the annular magnetic structure is arranged around the central magnetic structure, a high-pitch magnetic gap communicated with the through hole is formed between the central magnetic structure and the annular magnetic structure, and a low-pitch magnetic gap is formed between the annular magnetic structure and the vertical plate part; the outer ring magnetic steel surrounds the yoke and is arranged in the gap. The sounding unit is additionally provided with the outer ring magnetic steel, the BL value is large, and the performance is good.

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' demands for overall sound quality and loudness are getting higher and higher, the requirements for sound units are also further improved. In order to achieve a better experience, multiple sound units are often placed in a speaker, including a woofer, midrange unit, and tweeter. Filters can be used to filter out excess frequency bands and retain the desired effective bandwidth. Although the sound quality has improved, the size of the speaker has also increased, becoming bulky, and the cost has also increased. Based on this, sound units that can produce sound from both sides have appeared on the market, but existing double-sided sound units have the problem of a small total volume of magnetic circuit components and unsatisfactory acoustic performance. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance double-sided 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] Two basin racks, the two basin racks are spaced apart from each other, and a gap is formed between the two basin racks;

[0007] A yoke, the yoke comprising a flat plate portion and a vertical plate portion, the four sides of the flat plate portion being connected to the vertical plate portions respectively, the middle region of the vertical plate portion being connected to the flat plate portion, the flat plate portion being provided with a through hole, the upper portion of the vertical plate portion being connected to one of the basin frames, and the lower portion of the vertical plate portion being connected to another of the basin frames;

[0008] Two magnetic circuit assemblies, wherein the top and bottom surfaces of the flat plate portion are respectively provided with the magnetic circuit assemblies, and the magnetic circuit assemblies include a central magnetic structure and an annular magnetic structure, wherein the annular magnetic structure is arranged around the central magnetic structure, a treble magnetic gap communicating with the through hole is formed between the central magnetic structure and the annular magnetic structure, and a woofer magnetic gap is formed between the annular magnetic structure and the vertical plate portion;

[0009] An outer ring magnetic steel surrounds the yoke and is disposed in the gap.

[0010] In one embodiment, the flat plate portion is perpendicular to the vertical plate portion.

[0011] In one embodiment, an avoidance groove is provided on the outer ring magnetic steel.

[0012] In one embodiment, two vibration structures are further included, one vibration structure connects one basin frame and one annular magnetic structure, and the other vibration structure connects another basin frame and another annular magnetic structure; the vibration structure includes a support ring, a treble vibration assembly and a bass vibration assembly, the support ring is arranged on the annular magnetic structure, the treble vibration assembly includes a connected treble diaphragm assembly and a treble voice coil, the treble diaphragm assembly is connected to the annular magnetic structure, and the treble voice coil is arranged corresponding to the treble magnetic gap; the bass vibration assembly includes a connected bass diaphragm assembly and a bass voice coil, the bass diaphragm assembly is in the shape of a ring frame as a whole, the inner edge of the bass diaphragm assembly is connected to the support ring, the outer edge of the bass diaphragm assembly is connected to the basin frame, and the bass voice coil is arranged corresponding to the bass magnetic gap.

[0013] In one embodiment, the support ring is made of an elastic material, and the vibration structure further includes a hard dome, which is provided with an air vent, and the hard dome is arranged on the bass diaphragm assembly corresponding to the tweeter diaphragm assembly.

[0014] In one embodiment, the support ring is made of rubber or plastic.

[0015] In one embodiment, the hard dome is made of steel.

[0016] In one embodiment, 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 support ring and the hard dome, and at least a part of the bass inner fixed part is located directly above the tweeter diaphragm assembly.

[0017] In one embodiment, the bass diaphragm assembly further includes a bass dome, which is in the shape of a ring frame as a whole and is connected to the connecting portion.

[0018] 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 the support ring is provided on the tweeter outer fixed part, and the support ring is indirectly connected to the annular magnetic structure through the tweeter outer fixed part.

[0019] The beneficial effects of the present invention are as follows: the sound unit has a novel structure, the tweeter 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 tweeter system and the woofer system are not designed to share a cavity, and the tweeter system has an independent back cavity, so the tweeter system and the woofer system will not interfere with each other, which is conducive to ensuring the performance of the sound unit. The double-sided sound structure is adopted, and the total volume of the magnetic circuit components is relatively large, and the acoustic performance is further improved. At the same time, the double-sided coaxial anti-phase operation can also play a vibration reduction role, thereby making the sound unit have more reliable working stability. More importantly, the addition of the outer ring magnet can further increase the BL value of the sound unit, so that the performance of the sound unit can be greatly improved. 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 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a cross-sectional view of the sound unit of the first embodiment of the present invention. Figure 2 .

[0024] Description of Figure Numbers:

[0025] 1. Yoke; 11. Flat plate; 12. Vertical plate; 13. Through hole;

[0026] 2. Outer ring magnetic steel; 21. Avoidance groove;

[0027] 3. Basin rack;

[0028] 4. Central magnetic structure;

[0029] 5. Ring magnetic structure; 51. Ring magnetic steel; 52. Ring washer; 53. Expansion cavity;

[0030] 6. Support ring;

[0031] 7. Treble vibration assembly; 71. Treble diaphragm; 711. Treble inner fixing part; 712. Treble folding ring; 713. Treble outer fixing part; 72. Treble voice coil;

[0032] 8. Bass vibration assembly; 81. Bass diaphragm; 811. Bass inner fixing portion; 812. Inner folding ring portion; 813. Connecting portion; 814. Outer folding ring portion; 815. Bass outer fixing portion; 82. Bass voice coil;

[0033] 9. Hard ball top. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Example 1

[0041] Please refer to Figures 1 to 3 , the utility model embodiment 1 is: a sound unit, including a yoke 1, an outer ring magnetic steel 2, two basins 3, two magnetic circuit components and two vibration structures, the two basins 3 are arranged at intervals up and down, and a gap is formed between the two basins 3; the yoke 1 includes a flat plate portion 11 and a vertical plate portion 12, the four sides of the flat plate portion 11 are respectively connected to the vertical plate portion 12, the middle area of ​​the vertical plate portion 12 is connected to the flat plate portion 11, preferably the flat plate portion 11 is vertically connected to the vertical plate portion 12, the flat plate portion 11 is connected to the vertical plate portion 12, and the flat plate portion 11 is connected to the vertical plate portion 12. A through hole 13 is provided, the upper part of the vertical plate part 12 is connected to one of the basin frames 3, and the lower part of the vertical plate part 12 is connected to another basin frame 3; the outer ring magnetic steel 2 surrounds the yoke 1 and is arranged in the gap; the top and bottom surfaces of the flat plate part 11 are respectively provided with the magnetic circuit assembly, and the magnetic circuit assembly includes a central magnetic structure 4 and an annular magnetic structure 5, the annular magnetic structure 5 is arranged around the central magnetic structure 4, and a treble magnetic gap connected to the through hole 13 is formed between the central magnetic structure 4 and the annular magnetic structure 5. A bass magnetic gap is formed between the annular magnetic structure 5 and the vertical plate portion 12; one vibration structure connects one basin frame 3 and one annular magnetic structure 5, and the other vibration structure connects another basin frame 3 and another annular magnetic structure 5, that is, one vibration structure is arranged at the top of the sound-emitting unit, and the other vibration structure is arranged at the bottom of the sound-emitting unit; the vibration structure includes a support ring 6, a treble vibration component 7 and a bass vibration component 8, the support ring 6 is arranged on the annular magnetic structure 5, the treble vibration component 7 includes a connected treble diaphragm component and a treble voice coil 72, the treble diaphragm component is connected to the annular magnetic structure 5, and the treble voice coil 72 is arranged corresponding to the treble magnetic gap; the bass vibration component 8 includes a connected bass diaphragm component and a bass voice coil 82, the bass diaphragm component is in the shape of a ring frame as a whole, the inner edge of the bass diaphragm component is connected to the support ring 6, the outer edge of the bass diaphragm component is connected to the basin frame 3, and the bass voice coil 82 is arranged corresponding to the bass magnetic gap.

[0042] Specifically, the tweeter diaphragm assembly includes a tweeter diaphragm 71, which includes a tweeter inner fixing portion 711, a tweeter folding ring portion 712, and a tweeter outer fixing portion 713, which are sequentially connected from the inside to the outside. The tweeter outer fixing portion 713 is connected to the annular magnetic structure 5. The support ring 6 is provided on the tweeter outer fixing portion 713, and the support ring 6 is indirectly connected to the annular magnetic structure 5 via the tweeter outer fixing portion 713. Optionally, the tweeter diaphragm assembly further includes a tweeter dome, which is provided on the tweeter inner fixing portion 711.

[0043] The bass diaphragm assembly includes a bass diaphragm 81, and the bass diaphragm 81 includes a bass inner fixing portion 811, an inner folding ring portion 812, a connecting portion 813, an outer folding ring portion 814 and a bass outer fixing portion 815, which are connected in sequence from the inside to the outside. The bass outer fixing portion 815 is connected to the basin frame 3, and the bass inner fixing portion 811 is connected to the support ring 6. At least part of the bass inner fixing portion 811 is located directly above the tweeter diaphragm assembly. The setting of the support ring 6 allows the inner edge of the bass diaphragm assembly to extend above the tweeter diaphragm assembly, and the cross-sectional arc length of the inner folding ring portion 812 can be set longer. The bass compliance is increased by staggering, thereby increasing the low-frequency response bandwidth, so that the bass performance of the sound unit is effectively improved. Optionally, the bass diaphragm assembly also includes a bass dome, which is in the shape of a ring frame as a whole and is connected to the connecting portion 813. In this embodiment, the long side of the support ring 6 is connected to the bass external fixing portion 815 , and the short side of the support ring 6 is connected to the connecting portion 813 .

[0044] Optionally, the support ring 6 is made of an elastic material, and the vibration structure also includes a hard dome 9. The bass internal fixing portion 811 is connected to the hard dome 9. The hard dome 9 is provided with an air vent. The hard dome 9 is provided on the bass diaphragm assembly corresponding to the tweeter diaphragm assembly. When the sound unit is working at a high frequency, the treble sound pressure can be radiated through the air vent on the hard dome 9. When the sound unit is working at a low frequency, the hard dome 9 can vibrate together, pushing the air to do work, thereby increasing the bass radiation energy and improving the loudness. The support ring 6 made of elastic material not only serves to separate the upper space of the tweeter diaphragm assembly from the inner space of the bass diaphragm assembly, but also serves to enable the hard dome 9 to vibrate along with the bass diaphragm assembly.

[0045] In this embodiment, the material of the hard ball top 9 is steel. In other embodiments, the hard ball top 9 can also be made of hard plastic or other materials.

[0046] The support ring 6 is made of rubber, plastic or other materials. In this embodiment, the support ring 6 is made of silicone.

[0047] In order to facilitate the access of the external power supply, the outer ring magnetic steel 2 is provided with an avoidance groove 21, and the avoidance groove 21 is used to avoid the soldering pad on the basin frame 3 to facilitate the external FPC board to be connected to the soldering pad.

[0048] Optionally, an expansion cavity 53 is provided at the lower portion of the inner sidewall of the annular magnetic structure 5, communicating with the tweeter magnetic gap. The expansion cavity 53 increases the independent back cavity of the tweeter system, thereby reducing F0, increasing the effective high-frequency bandwidth, and improving the performance of the sound unit.

[0049] The annular magnetic structure 5 includes an annular magnetic steel 51 and an annular washer 52 . The annular magnetic steel 51 connects the annular washer 52 and the flat plate portion 11 . The expansion cavity 53 is provided on the annular magnetic steel 51 .

[0050] 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 Two basin racks, the two basin racks are spaced apart from each other, and a gap is formed between the two basin racks; A yoke, the yoke comprising a flat plate portion and a vertical plate portion, the four sides of the flat plate portion being connected to the vertical plate portions respectively, the middle region of the vertical plate portion being connected to the flat plate portion, the flat plate portion being provided with a through hole, the upper portion of the vertical plate portion being connected to one of the basin frames, and the lower portion of the vertical plate portion being connected to another of the basin frames; Two magnetic circuit assemblies, wherein the top and bottom surfaces of the flat plate portion are respectively provided with the magnetic circuit assemblies, and the magnetic circuit assemblies include a central magnetic structure and an annular magnetic structure, wherein the annular magnetic structure is arranged around the central magnetic structure, a treble magnetic gap communicating with the through hole is formed between the central magnetic structure and the annular magnetic structure, and a woofer magnetic gap is formed between the annular magnetic structure and the vertical plate portion; An outer ring magnetic steel surrounds the yoke and is disposed in the gap.

2. The sound unit according to claim 1, characterized in that: The flat plate portion is perpendicular to the vertical plate portion.

3. The sound unit according to claim 1, wherein: The outer ring magnetic steel is provided with an avoidance groove.

4. The sound unit according to claim 1, wherein: It also includes two vibration structures, one vibration structure connects the basin frame and the annular magnetic structure, and the other vibration structure connects the other basin frame and the other annular magnetic structure; the vibration structure includes a support ring, a treble vibration assembly and a bass vibration assembly, the support ring is arranged on the annular magnetic structure, the treble vibration assembly includes a connected treble diaphragm assembly and a treble voice coil, the treble diaphragm assembly is connected to the annular magnetic structure, and the treble voice coil is arranged corresponding to the treble magnetic gap; the bass vibration assembly includes a connected bass diaphragm assembly and a bass voice coil, the bass diaphragm assembly is in the shape of a ring frame as a whole, the inner edge of the bass diaphragm assembly is connected to the support ring, the outer edge of the bass diaphragm assembly is connected to the basin frame, and the bass voice coil is arranged corresponding to the bass magnetic gap.

5. The sound unit according to claim 4, characterized in that: The supporting ring is made of elastic material, and the vibration structure also includes a hard dome, which is provided with a vent hole. The hard dome is arranged on the bass diaphragm assembly corresponding to the tweeter diaphragm assembly.

6. The sound unit according to claim 5, characterized in that: The support ring is made of rubber or plastic.

7. The sound unit according to claim 5, characterized in that: The material of the hard dome is steel.

8. The sound unit according to claim 5, characterized in that: 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, and the bass inner fixing part is connected to the support ring and the hard dome. At least part of the bass inner fixing part is located directly above the tweeter diaphragm assembly.

9. The sound unit according to claim 8, characterized in that: The bass diaphragm assembly further comprises a bass dome, which is in the shape of a ring frame as a whole and is connected to the connecting portion.

10. The sound unit according to claim 4, characterized in that: The tweeter diaphragm assembly includes a tweeter diaphragm, and the tweeter diaphragm includes a tweeter inner fixing part, a tweeter folding ring part and a tweeter outer fixing part connected in sequence from the inside to the outside. The tweeter outer fixing part is connected to the annular magnetic structure, and the support ring is provided on the tweeter outer fixing part. The support ring is indirectly connected to the annular magnetic structure through the tweeter outer fixing part.

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