Vibrating diaphragm assembly and sound production unit

Abstract

The utility model discloses a vibrating diaphragm assembly and a sound production unit. The vibrating diaphragm assembly comprises an inner fixing part, a folding ring part and an outer fixing part which are sequentially connected from inside to outside. The vibrating diaphragm assembly is of a stacked structure, the stacked structure comprises a top covering layer, a damping layer, a flexible conductive part and a bottom covering layer, the damping layer is arranged on the lower surface of the top covering layer, and the damping layer is provided with a plurality of partition grooves formed at intervals; the flexible conductive piece is arranged on the lower surface of the top covering layer and located in the partition groove; the bottom covering layer is respectively connected with and covers the lower surface of the damping layer and the lower surface of the flexible conductive part, a first window and a second window which are used for exposing the flexible conductive part are arranged on the bottom covering layer, the first window is positioned in the area of the inner fixing part, and the second window is positioned in the area of the outer fixing part. The vibrating diaphragm assembly is novel in structure, and the flexible conductive piece is embedded in the vibrating diaphragm assembly, so that the vibrating diaphragm assembly has multiple functions of driving air to produce sound and conducting the voice coil, and multiple purposes are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electro-acoustic transducers, in particular to a diaphragm assembly and 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 structural space of the sounding units mounted therein also need to be further reduced. However, on the premise of compressing the structural size, the acoustic performance of the sounding unit cannot deteriorate, and even needs to be iteratively upgraded on the basis of the previous level, 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 assembly, so that the total volume of the magnetic circuit assembly is reduced, and the performance of the sounding unit is affected.

[0004] In addition, the existing diaphragm assembly has a single function and there is room for further improvement. Summary of the Utility Model

[0005] The technical problem solved by the utility model is to provide a multifunctional new diaphragm assembly and a sounding unit with the new diaphragm assembly, in which the conduction structure of the voice coil in the sounding unit does not occupy the layout space of the magnetic circuit assembly.

[0006] To solve the above technical problem, the first technical solution adopted by the utility model is: a diaphragm assembly, including an inner fixing part, a folding ring part and an outer fixing part which are connected in sequence from inside to outside;

[0007] The diaphragm assembly is a laminated structure, and the laminated structure includes

[0008] a top covering layer;

[0009] a damping layer, which is arranged on the lower surface of the top covering layer, and the damping layer has a plurality of partition grooves arranged at intervals;

[0010] a flexible conductive part, which is arranged on the lower surface of the top covering layer and located in the partition grooves;

[0011] a bottom covering layer, which is respectively connected to and covers the lower surface of the damping layer and the lower surface of the flexible conductive part, and the bottom covering layer is provided with a first window and a second window for the flexible conductive part to be exposed. The first window is located in the area of the inner fixing part, and the second window is located in the area of the outer fixing part.

[0012] In one embodiment, the plurality of partition grooves divide the damping layer into a plurality of parts.

[0013] In one embodiment, the number of the partition grooves is two, and the two partition grooves are respectively located at two ends of the damping layer.

[0014] In one embodiment, both of the two partition grooves are located on the central axis of the diaphragm assembly.

[0015] In one embodiment, the material of the bottom covering layer is polyether ether ketone, and / or the material of the top covering layer is polyether ether ketone.

[0016] In one embodiment, the flexible conductive member includes an inner conduction portion, a deformation portion and an outer conduction portion which are connected in sequence. The inner conduction portion is located in the inner fixing portion area, the deformation portion is located in the surround portion area, and the outer conduction portion is located in the outer fixing portion area.

[0017] In one embodiment, the flexible conductive member is conductive foam or a conductive coating formed by electroplating.

[0018] In order to solve the above technical problems, the second technical solution adopted by the present utility model is: a sounding unit, including the above-mentioned diaphragm assembly.

[0019] In one embodiment, it further includes a voice coil, the voice coil is connected to the bottom covering layer, and further includes a first conductive adhesive disposed in the first window. The voice coil is electrically connected to the flexible conductive member through the first conductive adhesive.

[0020] In one embodiment, it further includes a second conductive adhesive and a spider connected to the outer fixing portion. The spider is provided with a metal conductive member. The metal conductive member has a first contact area exposed at the top of the spider and a second contact area exposed at the bottom of the spider. The second conductive adhesive is disposed at the second window. The first contact area is electrically connected to the flexible conductive member through the second conductive adhesive.

[0021] The beneficial effects of the present utility model are as follows:

[0022] The structure of the present diaphragm assembly is novel, and a flexible conductive member is embedded therein, so that the diaphragm assembly has multiple functions of driving air to generate sound and conducting the voice coil, realizing multiple uses of one object.

[0023] Inside the sounding unit equipped with the present diaphragm assembly, there is no need to additionally provide a centering washer for conducting the voice coil, avoiding the occupation of the layout space of the magnetic circuit assembly inside the sounding unit by the centering washer, enabling the sounding unit to carry a magnetic circuit assembly with a larger overall volume, achieving the purpose of giving space to the magnetic circuit assembly 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. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 Structural schematic diagram of the diaphragm assembly of Embodiment 1 of the present invention;

[0026] Figure 2 Exploded view of the diaphragm assembly of Embodiment 1 of the present invention;

[0027] Figure 3 Partial sectional view of a partial structure of the sound generating unit of Embodiment 1 of the present invention.

[0028] Explanation of the reference numerals in the drawings:

[0029] 1. Top cover layer;

[0030] 2. Damping layer; 21. Partition groove;

[0031] 3. Flexible conductive member; 31. Inner conduction part; 32. Deformation part; 33. Outer conduction part;

[0032] 4. Bottom cover layer; 41. First window; 42. Second window;

[0033] 5. Dome;

[0034] 6. Spider;

[0035] 7. Voice coil; 71. Lead wire;

[0036] 10. Inner fixing part; 20. Folded ring part; 30. Outer fixing part. Detailed implementation manners

[0037] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings.

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, rather than all, embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0039] It should be noted that if there are directional indications in the embodiments of the present utility model, such as up, down, left, right, front, back..., the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions such as "first" and "second" 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 specifying 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.

[0041] In addition, the meaning of "and / or" that appears 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 various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "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.

[0043] Embodiment 1

[0044] Please refer to Figures 1 to 3, Embodiment 1 of the present utility model is: a diaphragm assembly, including an inner fixing portion 10, a folding ring portion 20, and an outer fixing portion 30 that are connected in sequence from the inside out; the diaphragm assembly is a laminated structure, and the laminated structure includes a top covering layer 1, a damping layer 2, a flexible conductive member 3, and a bottom covering layer 4. The damping layer 2 is disposed on the lower surface of the top covering layer 1, and the damping layer 2 has a plurality of partition grooves 21 arranged at intervals; the flexible conductive member 3 is disposed on the lower surface of the top covering layer 1 and is located within the partition grooves 21; the bottom covering layer 4 is respectively connected to and covers the lower surface of the damping layer 2 and the lower surface of the flexible conductive member 3. A first window 41 and a second window 42 for the flexible conductive member 3 to be exposed are provided on the bottom covering layer 4. The first window 41 is located in the area of the inner fixing portion 10, and the second window 42 is located in the area of the outer fixing portion 30.

[0045] In this embodiment, the damping layer 2 is adhesively connected or thermally pressed to the top covering layer 1 and the bottom covering layer 4 respectively.

[0046] Optionally, the plurality of partition grooves 21 divide the damping layer 2 into a plurality of parts. In this embodiment, the number of the partition grooves 21 is two, and the two partition grooves 21 are respectively located at both ends of the damping layer 2. To balance the center of gravity of the diaphragm assembly, preferably both of the two partition grooves 21 are located on the central axis of the diaphragm assembly. In this embodiment, the two partition grooves 21 are located on the central axis in the length direction of the diaphragm assembly. In other embodiments, it is also possible that the two partition grooves 21 are located on the central axis in the width direction of the diaphragm assembly. In addition, it should be noted that it is also possible that the partition grooves 21 do not completely partition the damping layer 2, as long as the partition grooves 21 can accommodate the flexible conductive member 3.

[0047] The material of the bottom covering layer 4 is polyether ether ketone, and / or the material of the top covering layer 1 is polyether ether ketone. Of course, it is also possible to use other commonly used materials for sound membranes for the material of the bottom covering layer 4 / the material of the top covering layer 1.

[0048] Specifically, the flexible conductive member 3 includes an inner conduction portion 31, a deformation portion 32, and an outer conduction portion 33 that are connected in sequence. The inner conduction portion 31 is located in the area of the inner fixing portion 10, the deformation portion 32 is located in the area of the folding ring portion 20, and the outer conduction portion 33 is located in the area of the outer fixing portion 30, that is, the first window 41 corresponds to the inner conduction portion 31, and the second window 42 corresponds to the outer conduction portion 33.

[0049] The flexible conductive member 3 is a conductive foam, an electroplated conductive coating, or other flexible structural members that can conduct electricity.

[0050] Optionally, the diaphragm assembly further includes a dome 5, and the dome 5 is disposed on the inner fixing portion 10. In some embodiments, a skylight is provided on the inner fixing portion 10, and the dome 5 covers the skylight to close the skylight.

[0051] This embodiment also provides a sounding unit, which includes a chassis 6, a voice coil 7, a magnetic circuit assembly, and the above-mentioned diaphragm assembly. The chassis 6 is fixedly connected to the magnetic circuit assembly and the diaphragm assembly respectively. The voice coil 7 is fixedly connected to the inner fixing portion 10 of the diaphragm assembly, and the magnetic circuit assembly has a magnetic gap for the voice coil 7 to move.

[0052] Specifically, the voice coil 7 is connected to the bottom covering layer 4. The sounding unit further includes a first conductive adhesive disposed in the first window 41. The lead 71 of the voice coil 7 is electrically connected to the flexible conductive member 3 through the first conductive adhesive, and other areas on the top surface of the voice coil 7 are adhesively fixed to the bottom covering layer 4 through a first insulating adhesive. In other embodiments, it is also acceptable that the bottom covering layer 4 is indirectly connected to the voice coil 7 through a skeleton.

[0053] The outer fixing portion 30 is connected to the chassis 6. A metal conductive member (not shown in the figure) is provided on the chassis 6. Optionally, the metal conductive member and the chassis 6 are an integrally formed structure by insert molding. The metal conductive member has a first contact area exposed at the top of the chassis 6 and a second contact area exposed at the bottom of the chassis 6. The sounding unit further includes a second conductive adhesive disposed at the second window 42. The first contact area is electrically connected to the flexible conductive member 3 through the second conductive adhesive. An external power supply supplies power to the voice coil 7 through the second contact area via the flexible conductive member 3.

[0054] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. Diaphragm assembly, characterized in that: It includes an inner fixing part, a folding ring part and an outer fixing part which are connected in sequence from the inside out; The diaphragm assembly is a laminated structure, and the laminated structure includes a top covering layer; a damping layer, the damping layer is arranged on the lower surface of the top covering layer, and the damping layer has a plurality of partition grooves arranged at intervals; a flexible conductive member, the flexible conductive member is arranged on the lower surface of the top covering layer and located in the partition grooves; a bottom covering layer, the bottom covering layer is respectively connected to and covers the lower surface of the damping layer and the lower surface of the flexible conductive member, and the bottom covering layer is provided with a first window and a second window for the flexible conductive member to be exposed, the first window is located in the area of the inner fixing part, and the second window is located in the area of the outer fixing part.

2. The diaphragm assembly according to claim 1, wherein: The plurality of partition grooves divide the damping layer into a plurality of parts.

3. The diaphragm assembly according to claim 2, characterized in that: The number of the partition grooves is two, and the two partition grooves are respectively located at both ends of the damping layer.

4. The diaphragm assembly according to claim 3, wherein: Both of the two partition grooves are located on the central axis of the diaphragm assembly.

5. The diaphragm assembly according to claim 1, wherein: The material of the bottom covering layer is polyetheretherketone, and / or the material of the top covering layer is polyetheretherketone.

6. The diaphragm assembly according to claim 1, wherein: The flexible conductive member includes an inner conduction part, a deformation part and an outer conduction part which are connected in sequence, the inner conduction part is located in the area of the inner fixing part, the deformation part is located in the area of the folding ring part, and the outer conduction part is located in the area of the outer fixing part.

7. The diaphragm assembly according to claim 1, wherein: The flexible conductive member is a conductive foam or a conductive coating formed by electroplating.

8. Sound generating unit, characterized in that: It includes the diaphragm assembly according to any one of claims 1-7.

9. The sound generating unit according to claim 8, wherein: It further includes a voice coil, the voice coil is connected to the bottom covering layer, and further includes a first conductive adhesive arranged in the first window, and the voice coil is electrically connected to the flexible conductive member through the first conductive adhesive.

10. The sound generating unit according to claim 8, wherein: It further includes a second conductive adhesive and a speaker frame connected to the outer fixing part, the speaker frame is provided with a metal conductive member, the metal conductive member has a first contact area exposed at the top of the speaker frame and a second contact area exposed at the bottom of the speaker frame, the second conductive adhesive is arranged at the second window, and the first contact area is electrically connected to the flexible conductive member through the second conductive adhesive.

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