Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a metal conductive piece, a diaphragm assembly, a voice coil, a first conductive adhesive and a second conductive adhesive, the metal conductive piece is arranged on the basin stand, one end of the metal conductive piece is exposed out of the top surface of the basin stand to form a first contact area, and the other end of the metal conductive piece is exposed out of the lower part of the basin stand to form a second contact area; the vibrating diaphragm assembly comprises a voice diaphragm, the bottom surface of the voice diaphragm is provided with a conductive coating, and the conductive coating comprises an inner conduction part, a deformation part and an outer conduction part which are sequentially connected from inside to outside. A conductive region is arranged on the top surface of the voice coil; the first conductive adhesive is connected with the conductive region and the inner conduction part; the second conductive adhesive is connected with the first contact area and the outer conduction part. The sounding unit is novel in structure, the conductive plating layer for conducting the voice coil is arranged on the bottom surface of the voice diaphragm, the arrangement space of a magnetic circuit assembly in the sounding unit does not need to be occupied, the sounding unit can carry the magnetic circuit assembly with a larger total volume, and the purpose of improving the performance of the sounding unit is achieved.

Description

Technical Field

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

[0002] With the thinning of portable electronic devices such as mobile phones, tablet computers, and smart watches, the size and structure space of the sounding units carried therein also need to be further reduced. However, the premise of compressing the structural size is that the acoustic performance of the sounding unit cannot deteriorate, and even needs to be iteratively upgraded on the previous basis, with further performance improvement. This poses a more stringent test for the design of the sounding unit.

[0003] In the prior art, the voice coil in the sounding unit is either conducted through a lead or through a centering washer. Both the lead and the centering washer need to occupy the space inside the sounding unit for arranging the magnetic circuit components, resulting in a reduction in the total volume of the magnetic circuit components and affecting the performance of the sounding unit. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a sounding unit in which the conduction structure of the voice coil does not occupy the layout space of the magnetic circuit components.

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

[0006] A chassis;

[0007] A metal conductive member, the metal conductive member is arranged on the chassis, one end of the metal conductive member is exposed on the top surface of the chassis to form a first contact area, and the other end of the metal conductive member is exposed at the lower part of the chassis to form a second contact area;

[0008] A diaphragm assembly, the diaphragm assembly includes a sound film, and a conductive coating is provided on the bottom surface of the sound film. The conductive coating includes an inner conduction part, a deformation part, and an outer conduction part that are connected in sequence from inside to outside;

[0009] A voice coil, and a conductive area is provided on the top surface of the voice coil;

[0010] A first conductive adhesive, the first conductive adhesive connects the conductive area and the inner conduction part;

[0011] A second conductive adhesive, the second conductive adhesive connects the first contact area and the outer conduction part.

[0012] In an embodiment, the diaphragm includes a lower PEEK layer, a damping layer, and an upper PEEK layer that are laminated and connected in sequence from bottom to top, and the conductive coating is provided on the bottom surface of the lower PEEK layer.

[0013] In one embodiment, a hollow hole is provided in the middle region of the deformation part.

[0014] In one embodiment, the inner conduction part includes a first straight part and a first arc part, and the two ends of the first straight part are respectively connected with the first arc part.

[0015] In one embodiment, the outer conduction part includes a second straight part and a second arc part, and the two ends of the second straight part are respectively connected with the second arc part.

[0016] In one embodiment, the first contact area is arranged corresponding to the second arc part.

[0017] In one embodiment, a first insulating glue is further included. The first insulating glue connects the top surface of the voice coil and the voice diaphragm, and the first insulating glue is offset from the first conductive glue.

[0018] In one embodiment, a second insulating glue is further included. The second insulating glue connects the top surface of the speaker frame and the voice diaphragm, and the second insulating glue is offset from the second conductive glue.

[0019] The beneficial effects of the present utility model are as follows: The structure of the present sounding unit is novel. A conductive coating for conducting electricity to the voice coil is provided on the bottom surface of the voice diaphragm, without occupying the layout space of the internal magnetic circuit components of the sounding unit, enabling the sounding unit to carry a magnetic circuit component with a larger overall volume, achieving the purpose of giving space to the magnetic circuit component to improve the driving force and thus improving the performance of the sounding unit; moreover, the centering washer positioning station and the hot pressing station are omitted, saving the manufacturing cost and the material cost of the centering washer, and reducing the production cost of the sounding unit. Description of the Drawings

[0020] 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 following drawings 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.

[0021] Figure 1 It is a schematic structural diagram of a partial structure of the sounding unit according to the first embodiment of the present utility model;

[0022] Figure 2 It is a schematic structural diagram of the conductive coating 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. Speaker frame;

[0025] 2. Diaphragm assembly; 21. Sound film

[0026] 3. Voice coil

[0027] 4. Conductive coating; 41. Inner conduction part; 411. First straight part; 412. First arc part; 42. Deformation part; 43. Outer conduction part; 431. Second straight part; 432. Second arc part; 44. Hollow hole Detailed implementation manners

[0028] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings

[0029] 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 of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model

[0030] 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

[0031] 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

[0032] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution, or the solution, or the solution that satisfies both simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model

[0033] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall 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.

[0034] Embodiment 1

[0035] Please refer to Figure 1 and Figure 2 Embodiment 1 of the present utility model is as follows: The sound generating unit includes a chassis 1, a metal conductive member (not shown in the figure), a diaphragm assembly 2, a voice coil 3, a first conductive adhesive (not shown in the figure), and a second conductive adhesive (not shown in the figure). The metal conductive member is provided on the chassis 1. One end of the metal conductive member is exposed on the top surface of the chassis 1 to form a first contact area, and the other end of the metal conductive member is exposed below the chassis 1 to form a second contact area. The external power supply conducts the metal conductive member through the second contact area. Preferably, the metal conductive member and the chassis 1 are an integrally formed structure by insert molding.

[0036] The diaphragm assembly 2 includes a sound film 21. A conductive coating 4 is provided on the bottom surface of the sound film 21. The conductive coating 4 includes an inner conduction part 41, a deformation part 42, and an outer conduction part 43 that are connected in sequence from the inside to the outside. Specifically, the sound film 21 includes an inner fixing part, a surround part, and an outer fixing part that are connected in sequence from the inside to the outside. The inner conduction part 41 is provided on the inner fixing part, the deformation part 42 is provided on the surround part, and the outer conduction part 43 is provided on the outer fixing part. During the vibration of the diaphragm assembly 2, the deformation part 42 moves synchronously with the surround part.

[0037] A conductive area is provided on the top surface of the voice coil 3. The current in the voice coil 3 is input / output via the conductive area. The first conductive adhesive connects the conductive area and the inner conduction part 41, and the second conductive adhesive connects the first contact area and the outer conduction part 43.

[0038] After the external power supply is connected to the second contact area, the current is transmitted through the second contact area, the metal conductive member, the first contact area, the second conductive adhesive, the outer conduction part 43, the deformation part 42, the inner conduction part 41, the first conductive adhesive, the conductive area, and the voice coil 3.

[0039] Optionally, the diaphragm assembly 2 further includes a dome provided on the inner fixing part.

[0040] The sound generating unit further includes a magnetic circuit assembly (not shown in the figure) connected to the chassis 1. The magnetic circuit assembly includes a yoke and a central magnetic structure and an edge magnetic structure respectively provided on the yoke. A magnetic gap for the voice coil 3 to move is formed between the central magnetic structure and the edge magnetic structure. In this sound generating unit, the edge magnetic structure can be a complete connected ring frame structure, which can maximize the magnetic field strength of the sound generating unit, thereby enhancing the performance of the sound generating unit. In other embodiments, the flanging of the yoke can also be used to replace the edge magnetic structure, and the flanging is formed by bending a partial area of the yoke.

[0041] In this embodiment, the diaphragm includes a lower PEEK layer, a damping layer, and an upper PEEK layer that are sequentially stacked and connected from bottom to top, and the conductive coating layer 4 is provided on the bottom surface of the lower PEEK layer.

[0042] To reduce the weight of the diaphragm assembly 2 and further improve the performance of the sound generating unit, it is preferred that a hollow hole 44 is provided in the middle area of the deformation part 42. The existence of the hollow hole 44 reduces the total area of the conductive coating layer 4, reduces the consumables used for the conductive coating layer 4, thereby saving costs.

[0043] The inner conduction part 41 includes a first straight part 411 and a first arc part 412. The two ends of the first straight part 411 are respectively connected with the first arc part 412. The first straight part 411 corresponds to the short axis side or the long axis side of the voice coil 3, and the first arc part 412 corresponds to the corner part of the voice coil 3; the outer conduction part 43 includes a second straight part 431 and a second arc part 432. The two ends of the second straight part 431 are respectively connected with the second arc part 432. The second straight part 431 corresponds to the short axis side or the long axis side of the chassis 1, and the second arc part 432 corresponds to the corner part of the chassis 1.

[0044] Generally speaking, the metal conductive part is often provided at the corner of the chassis 1. Therefore, the first contact area is arranged corresponding to the second arc part 432. Of course, in some sound generating units with special structures, it is also possible that the first contact area is arranged corresponding to the second straight part 431, and the specific setting is selected according to actual needs.

[0045] It is not difficult to understand that the conductive coating layer 4 with the above structure has the advantage of balancing the center of gravity of the diaphragm assembly 2.

[0046] To improve the connection stability between the diaphragm assembly 2 and the voice coil 3, the sound generating unit further includes a first insulating glue (not shown in the figure). The first insulating glue connects the top surface of the voice coil 3 and the sound film 21, and the first insulating glue is misaligned with the first conductive glue. Preferably, the first insulating glue covers all areas of the top surface of the voice coil 3 except the conductive area.

[0047] To improve the connection stability between the diaphragm assembly 2 and the chassis 1 and the airtightness of the sound generating unit, the sound generating unit further includes a second insulating glue (not shown in the figure). The second insulating glue connects the top surface of the chassis 1 and the sound film 21, and the second insulating glue is misaligned with the second conductive glue. Preferably, the second insulating glue covers all areas of the top surface of the chassis 1 except the first contact area.

[0048] 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 Basket; A metal conductive member, the metal conductive member is disposed on the basket, one end of the metal conductive member is exposed on the top surface of the basket to form a first contact area, and the other end of the metal conductive member is exposed at the lower part of the basket to form a second contact area; A diaphragm assembly, the diaphragm assembly includes a sounding film, a conductive coating is provided on the bottom surface of the sounding film, and the conductive coating includes an inner conduction part, a deformation part and an outer conduction part that are connected in sequence from the inside to the outside; Voice coil, a conductive area is provided on the top surface of the voice coil; A first conductive adhesive, the first conductive adhesive connects the conductive area and the inner conduction part; A second conductive adhesive, the second conductive adhesive connects the first contact area and the outer conduction part.

2. The sound generating unit according to claim 1, wherein: The diaphragm includes a lower PEEK layer, a damping layer, and an upper PEEK layer that are stacked and connected in sequence from bottom to top, and the conductive coating is provided on the bottom surface of the lower PEEK layer.

3. The sound generating unit according to claim 1, wherein: A hollow hole is provided in the middle area of the deformation part.

4. The sound generating unit according to claim 1, wherein: The inner conduction part includes a first straight part and a first arc part, and the two ends of the first straight part are respectively connected with the first arc part.

5. The sound generating unit according to claim 1, wherein: The outer conduction part includes a second straight part and a second arc part, and the two ends of the second straight part are respectively connected with the second arc part.

6. The sound generating unit according to claim 5, wherein: The first contact area is arranged corresponding to the second arc part.

7. The sound generating unit according to claim 1, wherein: It further includes a first insulating adhesive, the first insulating adhesive connects the top surface of the voice coil and the sounding film, and the first insulating adhesive is misaligned with the first conductive adhesive.

8. The sound generating unit according to claim 1, characterized in that: It further includes a second insulating adhesive, the second insulating adhesive connects the top surface of the basket and the sounding film, and the second insulating adhesive is misaligned with the second conductive adhesive.

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