Sound production unit

Abstract

The sound production unit comprises a diaphragm assembly, a conduction FPC and a plurality of voice coils, the diaphragm assembly comprises a voice diaphragm and a dome, the voice diaphragm comprises an inner fixing part, a folding ring part and an outer fixing part which are sequentially connected from inside to outside, the inner fixing part is provided with an open window, the open window is internally provided with a plurality of separation ribs which equally divide the open window into a plurality of windows, and the separation ribs are arranged in the open window. The ball top is arranged on the top surface of the inner fixing part and seals the window; the conducting FPC comprises a conducting part, a built-in part and an exposed part, the built-in part and the exposed part are connected, the built-in part is embedded into the voice diaphragm, the exposed part is exposed from the side edge of the voice diaphragm, the built-in part is connected with the conducting part extending into the window, an inner bonding pad is arranged on the conducting part, and an outer bonding pad conducted with the inner bonding pad is arranged on the exposed part; the plurality of voice coils are connected to the inner fixing part side by side, the separation ribs are respectively connected with two adjacent voice coils, and the voice coils are arranged around the window and are welded and conducted with the inner bonding pad in the window. The sound production unit is high in BL value and excellent in performance.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly to a sounding unit. Background Art

[0002] As a common electroacoustic transducer for converting electrical energy into sound energy, the sounding unit plays an indispensable role in the sound reproduction system.

[0003] At present, sounding units are becoming thinner and lighter, but the required performance is getting higher and higher. The cantilever and pad of the conductive FPC for conducting the voice coil will occupy part of the area of the voice coil or the magnet, resulting in less than satisfactory performance of the sounding unit. In particular, in a sounding unit with a multi-voice coil structure, the conductive FPC needs to occupy more space inside the sounding unit for arranging the voice coil or magnetic circuit components, so that the performance of the sounding unit fails to meet the expectations. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a high-performance sounding unit with a multi-voice coil structure.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a sounding unit, comprising:

[0006] A diaphragm assembly, the diaphragm assembly includes a sound film and a dome. The sound film includes an inner fixing part, a folding ring part and an outer fixing part which are connected in sequence from inside to outside. An opening is provided on the inner fixing part. A plurality of partition ribs for evenly dividing the opening into a plurality of windows are arranged in the opening. The dome is arranged on the top surface of the inner fixing part and closes the opening;

[0007] A conductive FPC, the conductive FPC includes a conducting part, and a hidden part and an exposed part connected thereto. The hidden part is embedded in the sound film, the exposed part is exposed from the side of the sound film. The hidden part is connected with a conducting part extending into the window. An inner pad is provided on the conducting part, and an outer pad conducting with the inner pad is provided on the exposed part;

[0008] A plurality of voice coils, the plurality of voice coils are connected side by side on the inner fixing part. The partition ribs are respectively connected to two adjacent voice coils. The voice coils are arranged around the window and are welded and conducted with the inner pad in the window.

[0009] In one embodiment, the hidden part includes a connecting part and a main body. The main body includes a square part and a plurality of strip parts connected thereto. The strip parts are located inside the square part and are embedded in the partition ribs. The square part is arranged around the opening. Both ends of the main body are respectively connected with the connecting part. One end of a connecting part far from the main body is connected with the exposed part. The conducting part is vertically connected to each strip part, and both ends of the conducting part are respectively connected to the square part.

[0010] In one embodiment, the connecting parts at both ends of the main body are symmetrically arranged.

[0011] In one embodiment, the conductive FPC is an axisymmetric structure.

[0012] In one embodiment, the number of the one-character parts is one, and the main body and the conductive parts form a square structure.

[0013] In one embodiment, the connecting part includes an inner fixing section, a deformation section and an outer fixing section which are connected in sequence. The inner fixing section is embedded in the inner fixing part, the deformation section is embedded in the folding ring part, and the outer fixing section is embedded in the outer fixing part.

[0014] In one embodiment, the conductive FPC is an integral structure formed by one-piece processing.

[0015] In one embodiment, a downward convex structure is formed in the area of the inner side of the sounding film corresponding to the built-in part.

[0016] In one embodiment, the sounding film and the conductive FPC are an integral structure formed by one-piece injection molding.

[0017] In one embodiment, two adjacent voice coils are bonded to each other.

[0018] The beneficial effect of the present utility model is that the conductive FPC embedded in the sounding film does not need to occupy the space for arranging the voice coil and the magnetic circuit assembly inside the sounding unit, so that the BL value of the sounding unit can be effectively guaranteed, and further the sounding unit has better performance. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a schematic structural diagram of the sounding unit according to the first embodiment of the present utility model;

[0021] Figure 2 It is a cross-sectional view of the sounding unit according to the first embodiment of the present utility model;

[0022] Figure 3 It is an exploded view of a part of the structure in the sounding unit according to the first embodiment of the present utility model.

[0023] Explanation of the reference numerals in the drawings:

[0024] 1. Basin frame

[0025] 2. Magnetic circuit component

[0026] 3. Diaphragm component; 31. Sound film; 311. Inner fixing part; 312. Folded ring part; 313. Outer fixing part; 314. Partition rib; 315. Window; 316. Lower convex structure; 32. Dome

[0027] 4. Conductive FPC; 41. Hidden part; 411. Connection part; 4111. Inner fixing section; 4112. Deformation section; 4113. Outer fixing section; 412. Main body; 4121. Square part; 4122. Linear part; 42. Exposed part; 421. Outer pad; 43. Conductive part; 431. Inner pad

[0028] 5. Voice coil Specific embodiments

[0029] The realization of the object, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present utility model

[0031] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly

[0032] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature

[0033] In addition, the meaning of "and / or" as used throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution of "A", or the solution of "B", or the solution where both "A" and "B" are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0034] In this application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] Embodiment 1

[0036] Please refer to Figures 1 to 3 , Embodiment 1 of this utility model is as follows: The sound generating unit includes a chassis 1, a magnetic circuit assembly 2, a diaphragm assembly 3, a conductive FPC 4, and a plurality of voice coils 5. The magnetic circuit assembly 2 is connected to the chassis 1, and the magnetic circuit assembly 2 has a magnetic gap corresponding to the voice coil 5; The diaphragm assembly 3 includes a sound film 31 and a dome 32. The sound film 31 includes an inner fixing portion 311, a surround portion 312, and an outer fixing portion 313 that are connected in sequence from the inside to the outside. The outer fixing portion 313 is connected to the chassis 1. The inner fixing portion 311 is provided with a window, and there are several partition ribs 314 in the window that divide the window into a plurality of windows 315. The dome 32 is disposed on the top surface of the inner fixing portion 311 and closes the window; The partition ribs 314 and the sound film 31 are an integral structure formed by one-piece processing. Therefore, to some extent, the partition ribs 314 can also be regarded as a partial area of the inner fixing portion 311;

[0037] The conductive FPC 4 includes a conductive portion 43, and a hidden portion 41 and an exposed portion 42 connected thereto. The hidden portion 41 is embedded in the sound film 31, the exposed portion 42 is exposed from the side of the sound film 31, the hidden portion 41 is connected to a conductive portion 43 extending into the window 315, and an inner pad 431 is provided on the conductive portion 43, and an outer pad 421 electrically connected to the inner pad 431 is provided on the exposed portion 42;

[0038] A plurality of the voice coils 5 are connected in parallel on the inner fixing portion 311. The separating ribs 314 are respectively connected to two adjacent voice coils 5. The voice coils 5 are arranged around the window 315 and are welded and electrically connected to the inner pad 431 located in the window 315.

[0039] Preferably, the sounding film 31 and the conductive FPC 4 are of an integrally injection-molded integrated structure.

[0040] Two adjacent voice coils 5 are adhesively bonded to each other. Two adjacent voice coils 5 can be adhesively bonded by double-sided tape, adhesively bonded by glue, or adhesively bonded by the self-adhesive layer on the surface of the wire used for winding the coil.

[0041] The embedded portion 41 includes a connecting portion 411 and a main body 412. The main body 412 includes a connected square-shaped portion 4121 and a plurality of linear portions 4122. The linear portions 4122 are located within the square-shaped portion 4121 and are embedded within the separating ribs 314. The square-shaped portion 4121 surrounds the opening window. Both ends of the main body 412 are respectively connected to the connecting portion 411. One end of a connecting portion 411 away from the main body 412 is connected to the exposed portion 42. The conductive portion 43 is perpendicularly connected to each of the linear portions 4122, and both ends of the conductive portion 43 are respectively connected to the square-shaped portion 4121.

[0042] To balance the center of gravity of the vibration membrane assembly 3, it is preferred that the connecting portions 411 at both ends of the main body 412 are symmetrically arranged. Further preferably, the conductive FPC 4 is of an axisymmetric structure.

[0043] In this embodiment, the number of the linear portions 4122 is one, and the main body 412 and the conductive portion 43 form a structure in the shape of a Chinese character 'tian'.

[0044] Specifically, the connecting portion 411 includes an inner fixing section 4111, a deformation section 4112, and an outer fixing section 4113 that are connected in sequence. The inner fixing section 4111 is embedded within the inner fixing portion 311 and is connected to the main body 412. The deformation section 4112 is embedded within the surround portion 312. The outer fixing section 4113 is embedded within the outer fixing portion 313. The outer fixing section 4113 of one connecting portion 411 is connected to the exposed portion 42.

[0045] For convenience of processing, it is preferred that the conductive FPC 4 is of an integrally processed integrated structure.

[0046] An inwardly convex structure 316 is formed in the area of the inner side of the sound film 31 corresponding to the built-in part 41. The voice coil 5 is connected to the inwardly convex structure 316. The inwardly convex structure 316 can function as a skeleton, enabling the voice coil 5 to penetrate deeper into the magnetic gap, thereby improving the performance of the sound generating unit. Additionally, since the inwardly convex structure 316 is formed on the sound film 31, other areas of the sound film 31 do not need to be thickened, which is beneficial for reducing the overall weight of the diaphragm assembly 3 and saving the manufacturing consumables of the sound film 31.

[0047] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. Sound generating unit, characterized in that: Comprising a diaphragm assembly, the diaphragm assembly including a sounding diaphragm and a dome, the sounding diaphragm including an inner fixing portion, a folding ring portion and an outer fixing portion which are connected in sequence from inside to outside, the inner fixing portion being provided with a window, and a plurality of partition ribs for equally dividing the window into a plurality of windows being arranged in the window, the dome being arranged on the top surface of the inner fixing portion and closing the window; a conductive FPC, the conductive FPC including a conductive portion and a hidden portion and an exposed portion connected thereto, the hidden portion being embedded in the sounding diaphragm, the exposed portion being exposed from the side of the sounding diaphragm, a conductive portion extending into the window being connected to the hidden portion, an inner pad being arranged on the conductive portion, and an outer pad electrically connected to the inner pad being arranged on the exposed portion; a plurality of voice coils, the plurality of voice coils being connected side by side on the inner fixing portion, the partition ribs being respectively connected to two adjacent voice coils, the voice coils being arranged around the window and being welded and electrically connected to the inner pad located in the window.

2. The sound generating unit according to claim 1, wherein: The hidden portion includes a connecting portion and a main body, the main body including a square portion and a plurality of linear portions connected thereto, the linear portions being located inside the square portion and being embedded in the partition ribs, the square portion being arranged around the window, the two ends of the main body being respectively connected with the connecting portion, one end of a connecting portion far away from the main body being connected with the exposed portion, the conductive portion being vertically connected to each of the linear portions, and the two ends of the conductive portion being respectively connected to the square portion.

3. The sound generating unit according to claim 2, wherein: The connecting portions at the two ends of the main body are symmetrically arranged.

4. The sound generating unit according to claim 3, wherein: The conductive FPC has an axisymmetric structure.

5. The sound generating unit according to claim 2, characterized in that: The number of the linear portions is one, and the main body and the conductive portion form a cross-shaped structure.

6. The sound generating unit according to claim 2, wherein: The connecting portion includes an inner fixing section, a deformation section and an outer fixing section which are connected in sequence, the inner fixing section being embedded in the inner fixing portion, the deformation section being embedded in the folding ring portion, and the outer fixing section being embedded in the outer fixing portion.

7. The sound generating unit according to claim 2, wherein: The conductive FPC is an integrally formed one-piece structure.

8. The sound generating unit according to claim 1, wherein: A downward convex structure is formed in the inner side of the sounding diaphragm corresponding to the area of the hidden portion.

9. The sound generating unit according to claim 1, wherein: The sounding diaphragm and the conductive FPC are an integrally injection-molded one-piece structure.

10. The sound generating unit according to claim 1, wherein: Two adjacent voice coils are adhesively bonded to each other.

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