Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a magnetic circuit system, a diaphragm assembly, a bass voice coil and a treble voice coil, the magnetic circuit system is connected with the basin stand, the magnetic circuit system comprises a yoke, a central magnetic structure and a side magnetic structure, the central magnetic structure and the side magnetic structure are respectively arranged on the yoke, and a bass magnetic gap is formed between the central magnetic structure and the side magnetic structure; the central magnetic structure comprises lower magnetic steel, a central washer and upper magnetic steel which are sequentially stacked and connected from bottom to top, the upper magnetic steel is in a ring frame shape, the central washer is provided with a convex hull, the convex hull is located in a hollow area of the upper magnetic steel, and a high-pitch magnetic gap is formed between the upper magnetic steel and the convex hull; the vibrating diaphragm assembly comprises a voice diaphragm, the voice diaphragm comprises an inner fixing part, an inner side folding ring part, a middle fixing ring, a middle folding ring part, a connecting part, an outer side folding ring part and an outer fixing part which are sequentially connected from inside to outside, the middle fixing ring is connected to the top of the central magnetic structure, and the outer fixing part is connected with the basin stand. The vibration surface of the sound production unit is complete and seamless, and waterproof and sealing failures caused by degumming of the joints of the diaphragm assembly are avoided.

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] With the development of science and technology, people have increasingly stronger requirements for the functionality of electroacoustic products. For the sound unit, not only good acoustic performance is required, but also waterproof performance is required.

[0003] Existing coaxial sound units are those that integrate a tweeter and a woofer, with the tweeter and woofer arranged coaxially. In most coaxial sound units, the sound sources of the tweeter and woofer are located in front of the coaxial sound unit, and the tweeter and woofer emit sound in the same direction. However, the tweeter and woofer of a coaxial sound unit each contain independent vibration systems. The inner edge of the tweeter diaphragm assembly and the outer edge of the woofer diaphragm assembly are respectively fixed by glue and a magnetic circuit system. Not only are these components numerous and the structure complex, but the glue application is also unstable, which can easily lead to waterproofing and sealing failures, resulting in air or water leakage in the coaxial sound unit. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a sound-generating unit with good waterproof effect.

[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] A magnetic circuit system connected to the basin frame, comprising a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke, wherein a bass magnetic gap is formed between the central magnetic structure and the side magnetic structures; the central magnetic structure comprises a lower magnetic steel, a central washer, and an upper magnetic steel in the shape of a ring frame, stacked and connected in sequence from bottom to top, the central washer having a convex hull located within a hollow region of the upper magnetic steel, and a treble magnetic gap is formed between the upper magnetic steel and the convex hull;

[0008] A diaphragm assembly, the diaphragm assembly including a sound diaphragm, the sound diaphragm including an inner fixing portion, an inner folding portion, a middle fixing ring, a middle folding portion, a connecting portion, an outer folding portion, and an outer fixing portion connected in sequence from the inside to the outside, the middle fixing ring being connected to the top of the central magnetic structure, and the outer fixing portion being connected to the basin frame;

[0009] a woofer voice coil connected to the connecting portion and arranged corresponding to the woofer magnetic gap;

[0010] A tweeter voice coil is connected to the inner fixing portion and is arranged corresponding to the tweeter magnetic gap.

[0011] In one embodiment, the middle fixing ring is connected to the central magnetic structure to form a continuous ring-shaped sealing area.

[0012] In one embodiment, the middle fixing ring is directly connected to the top surface of the upper magnetic steel.

[0013] In one embodiment, a step portion is provided on the inner edge of the top of the upper magnetic steel, the middle fixing ring is connected to the step portion, and the cross section of the ring frame-shaped sealing area is step-shaped.

[0014] In one embodiment, a ring-frame-shaped support member is further included, wherein the support member is fixedly connected to the top surface of the upper magnetic steel, and the middle fixing ring is connected to the support member.

[0015] In one embodiment, the support member is sealedly connected to the upper magnetic steel and the middle fixing ring respectively.

[0016] In one embodiment, the cross section of the support member is rectangular, and the top surface and at least one side surface of the support member are connected to the middle fixing ring.

[0017] In one embodiment, the cross section of the support member is L-shaped, and the cross section of the connection area between the support member and the middle fixing ring is stepped.

[0018] In one embodiment, the central magnetic structure further includes a washer ring provided on the top surface of the upper magnetic steel, and the washer ring is located on the inner side of the middle fixing ring.

[0019] In one embodiment, the diaphragm assembly further includes a skeleton and a centering support, the skeleton is connected to the bass voice coil, the connecting portion and the centering support respectively, and the centering support is connected to the basin frame.

[0020] The beneficial effects of this utility model are as follows: the sound unit has a novel structure, and the tweeter and woofer share the same diaphragm, which reduces the number of parts in the sound unit, simplifies the structure of the sound unit, facilitates assembly and manufacturing of the sound unit, and helps reduce the manufacturing cost of the sound unit. The sound unit's vibration surface is complete and seamless, effectively avoiding waterproofing and sealing failure caused by debonding at the seams of the diaphragm assembly, and ensuring that air and water leakage will not occur on the vibration surface side of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 This is a cross-sectional view of the sound unit of the first embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of the sound unit of the second embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of the sound unit of the third embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of the sound unit of the fourth embodiment of the present invention.

[0026] Description of Figure Numbers:

[0027] 1. Basin rack;

[0028] 2. Magnetic circuit system; 21. Yoke; 22. Center magnetic structure; 221. Lower magnetic steel; 222. Center washer; 2221. Convex hull; 223. Upper magnetic steel; 2231. Step; 224. Washer ring; 23. Side magnetic structure;

[0029] 3. Diaphragm assembly; 31. Diaphragm; 311. Inner fixing portion; 312. Inner fold; 313. Middle fixing ring; 314. Middle fold; 315. Connecting portion; 316. Outer fold; 317. External fixing portion; 32. Frame; 33. Centering support; 34. Dome;

[0030] 4. Bass voice coil;

[0031] 5. Treble voice coil;

[0032] 6. Support parts. 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 Figure 1, the utility model embodiment 1 is: a sound unit, including a basin frame 1, a magnetic circuit system 2, a diaphragm assembly 3, a bass voice coil 4 and a tweeter voice coil 5, the magnetic circuit system 2 is connected to the basin frame 1, the magnetic circuit system 2 includes a yoke 21 and a central magnetic structure 22 and a side magnetic structure 23 respectively provided on the yoke 21, a bass magnetic gap is formed between the central magnetic structure 22 and the side magnetic structure 23, the side magnetic structure 23 is connected to the basin frame 1, the side magnetic structure 23 includes a side magnetic steel and a side magnetic steel. The washer, the side magnetic steels are respectively connected to the yoke 21 and the side washers, and the side washers are connected to the basin frame 1; the central magnetic structure 22 includes a lower magnetic steel 221, a central washer 222 and an upper magnetic steel 223 in a ring frame shape stacked and connected from bottom to top, the central washer 222 has a convex bulge 2221, and the convex bulge 2221 is located in the hollow area of the upper magnetic steel 223, and a treble magnetic gap is formed between the upper magnetic steel 223 and the convex bulge 2221.

[0041] The diaphragm assembly 3 includes a sound diaphragm 31, and the sound diaphragm 31 includes an inner fixing portion 311, an inner folding ring portion 312, a middle fixing ring 313, a middle folding ring portion 314, a connecting portion 315, an outer folding ring portion 316 and an outer fixing portion 317, which are sequentially connected from the inside to the outside. The inner fixing portion 311, the inner folding ring portion 312, the middle fixing ring 313, the middle folding ring portion 314, the connecting portion 315, the outer folding ring portion 316 and the outer fixing portion 317 are an integrated structure formed by integral processing. For example, one-piece injection molding, the material of the sound membrane 31 includes but is not limited to PEEK, rubber, silicone, TPEE, etc.; the middle fixing ring 313 is connected to the top of the central magnetic structure 22, and the outer fixing part 317 is connected to the basin frame 1; in this embodiment, the inner folding ring part 312 and the middle folding ring part 314 are both outward convex folding ring structures convex toward the direction away from the yoke 21, and the outer folding ring part 316 is an inward concave folding ring structure concave toward the direction close to the yoke 21.

[0042] The woofer voice coil 4 is connected to the connecting portion 315 and is arranged corresponding to the woofer magnetic gap; the treble voice coil 5 is connected to the inner fixing portion 311 and is arranged corresponding to the treble magnetic gap.

[0043] In order to isolate the bass system and the treble system of the sound unit and avoid mutual influence between the two, it is preferred that the middle fixing ring 313 is connected to the central magnetic structure 22 to form a continuous ring-shaped sealing area.

[0044] In this embodiment, the middle fixing ring 313 is directly connected to the top surface of the upper magnetic steel 223, and the specific connection method can be selected from welding, adhesive connection, etc.

[0045] In this embodiment, the central magnetic structure 22 further includes a washer ring 224 disposed on the top surface of the upper magnetic steel 223 . The washer ring 224 is located inside the middle fixing ring 313 .

[0046] Optionally, the diaphragm assembly 3 further includes a skeleton 32 and a centering support 33 , wherein the skeleton 32 is connected to the bass voice coil 4 , the connecting portion 315 and the centering support 33 respectively, and the centering support 33 is connected to the basin frame 1 .

[0047] In order to improve the rigidity of the diaphragm assembly 3 , the diaphragm assembly 3 further includes a spherical top 34 connected to the inner fixing portion 311 . Optionally, a window is provided on the inner fixing portion 311 , and the spherical top 34 closes the window.

[0048] Example 2

[0049] Please combine Figure 2 The second embodiment of the present invention is a technical solution parallel to the first embodiment, and differs from the first embodiment in that a step portion 2231 is provided on the inner edge of the top of the upper magnetic steel 223, and the middle fixing ring 313 is connected to the step portion 2231. The cross-section of the ring frame-shaped sealing area is stepped, thereby increasing the bonding area between the upper magnetic steel 223 and the middle fixing ring 313, improving the stability of the connection between the two, and at the same time, better isolating the bass system and the treble system in the sound unit, which is conducive to ensuring the structural stability and performance stability of the sound unit.

[0050] It is easy to understand that there is no washer ring on the top surface of the upper magnetic steel 223 of the sound unit of this embodiment.

[0051] Example 3

[0052] Please combine Figure 3 , Example 3 of the present invention is a further improvement made on the basis of Example 1, and the difference from Example 1 is that: the sound unit also includes a ring-frame-shaped support member 6, and the support member 6 is fixedly connected to the top surface of the upper magnetic steel 223, and the middle fixing ring 313 is connected to the support member 6. That is to say, in this embodiment, the middle fixing ring 313 is indirectly connected to the top of the central magnetic structure 22 through the support member 6.

[0053] In this way, the tweeter diaphragm 31 can be supported, so that the tweeter system and the woofer system of the sound unit have a larger vibration margin, allowing the tweeter voice coil 5 and the woofer voice coil 4 to vibrate with a larger amplitude, thereby improving the acoustic performance of the sound unit.

[0054] In order to better isolate the treble system and the bass system of the sound unit, the support member 6 is sealed and connected to the upper magnetic steel 223 and the middle fixing ring 313 respectively.

[0055] In this embodiment, the cross section of the support member 6 is rectangular, and the top surface and at least one side surface of the support member 6 are connected to the middle fixing ring 313. This can effectively improve the stability of the connection between the middle fixing ring 313 and the support member 6.

[0056] Example 4

[0057] Please combine Figure 4 The fourth embodiment of the present invention is a further improvement on the third embodiment. It differs from the third embodiment in that the cross-section of the support member 6 is L-shaped, and the cross-section of the connection area between the support member 6 and the central fixing ring 313 is stepped. The L-shaped cross-section of the support member 6 and the central fixing ring 313 allows for a more stable connection.

[0058] 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; A magnetic circuit system connected to the basin frame, comprising a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke, wherein a bass magnetic gap is formed between the central magnetic structure and the side magnetic structures; the central magnetic structure comprises a lower magnetic steel, a central washer, and an upper magnetic steel in the shape of a ring frame, stacked and connected in sequence from bottom to top, the central washer having a convex hull located within a hollow region of the upper magnetic steel, and a treble magnetic gap is formed between the upper magnetic steel and the convex hull; A diaphragm assembly, the diaphragm assembly including a sound diaphragm, the sound diaphragm including an inner fixing portion, an inner folding portion, a middle fixing ring, a middle folding portion, a connecting portion, an outer folding portion, and an outer fixing portion connected in sequence from the inside to the outside, the middle fixing ring being connected to the top of the central magnetic structure, and the outer fixing portion being connected to the basin frame; a woofer voice coil connected to the connecting portion and arranged corresponding to the woofer magnetic gap; A tweeter voice coil is connected to the inner fixing portion and is arranged corresponding to the tweeter magnetic gap.

2. The sound unit according to claim 1, characterized in that: The middle fixing ring is connected to the central magnetic structure to form a continuous ring-frame-shaped sealing area.

3. The sound unit according to claim 2, characterized in that: The middle fixing ring is directly connected to the top surface of the upper magnetic steel.

4. The sound unit according to claim 3, characterized in that: A step portion is provided on the inner edge of the top of the upper magnetic steel, the middle fixing ring is connected to the step portion, and the cross section of the ring frame-shaped sealing area is in a step shape.

5. The sound unit according to claim 1, characterized in that: It also includes a ring frame-shaped support member, which is fixedly connected to the top surface of the upper magnetic steel, and the middle fixed ring is connected to the support member.

6. The sound unit according to claim 5, characterized in that: The support members are respectively sealed and connected to the upper magnetic steel and the middle fixing ring.

7. The sound unit according to claim 6, characterized in that: The cross section of the support member is rectangular, and the top surface and at least one side surface of the support member are connected to the middle fixing ring.

8. The sound unit according to claim 6, characterized in that: The cross section of the support member is L-shaped, and the cross section of the connection area between the support member and the middle fixing ring is stepped.

9. The sound unit according to claim 1, characterized in that: The central magnetic structure further includes a washer ring arranged on the top surface of the upper magnetic steel, and the washer ring is located on the inner side of the middle fixed ring.

10. The sound unit according to claim 1, characterized in that: The diaphragm assembly further includes a skeleton and a centering support. The skeleton is respectively connected to the bass voice coil, the connecting portion and the centering support. The centering support is connected to the basin frame.

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