Diaphragm

Abstract

A diaphragm, comprising: an intermediate layer used for providing a support force for the diaphragm; and a metal film attached to the surfaces of the intermediate layer and covering both the front surface and the back surface of the intermediate layer, wherein the metal film is provided with a circuit structure, and the circuit structure is bent at the edges of the intermediate layer and continuously extends from the front surface of the intermediate layer to the back surface of the intermediate layer. By means of arranging the metal thin film on the surfaces of the intermediate layer after said film is folded in half, the circuit structure continuously extends in a bending manner from the front surface of the intermediate layer to the back surface of the intermediate layer, thereby effectively reducing the number of welds between the circuit structure on the front surface of the intermediate layer and the circuit structure on the back surface of the intermediate layer, reducing the weight of the diaphragm, and improving the efficiency and treble quality of the diaphragm.

Description

A diaphragm

[0001] Cross-reference to related applications

[0002] This application refers to the following Chinese patent applications, which are incorporated by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the field of loudspeakers, and in particular to a diaphragm. BACKGROUND

[0004] With the continuous development of sound technology, a planar diaphragm loudspeaker is welcomed by users due to its more real and pure high pitch and less distortion. The main principle is to place a planar diaphragm with a conductive circuit in a magnetic field, apply an audio current to the circuit, and drive the planar diaphragm to vibrate and produce sound under the action of the Ampere force in the magnetic field.

[0005] Generally, in order to increase the diaphragm efficiency balance resistance, the front and back surfaces of the planar diaphragm are provided with circuit structures, and the circuits on the front and back surfaces often need to be connected by welding or using another cable, which makes the weight of the planar diaphragm extra heavy, and the efficiency and high pitch quality of the planar diaphragm are affected.

[0006] SUMMARY

[0007] In view of the above problems, the present application is proposed to provide a diaphragm and a processing method thereof.

[0008] One embodiment of the present application provides a diaphragm, comprising:

[0009] an intermediate layer for providing support force for the diaphragm;

[0010] a metal film attached to the surface of the intermediate layer and covering the front and back surfaces of the intermediate layer;

[0011] wherein the metal film is provided with a circuit structure, the circuit structure is bent at the edge of the intermediate layer, and extends uninterruptedly from the front surface of the intermediate layer to the back surface of the intermediate layer.

[0012] Optionally, the circuit structure extends from the front surface of the intermediate layer to the back surface of the intermediate layer after being bent at the first side edge of the intermediate layer along with the metal film.

[0013] Optionally, the circuit structure at the head end of the metal film is connected to the circuit structure at the tail end of the metal film by welding.

[0014] Optionally, the metal thin film is in a closed structure, and the circuit structure extends from the front surface of the intermediate layer to the back surface of the intermediate layer after the metal thin film is bent by the first side and the second side of the intermediate layer.

[0015] Optionally, in the width direction of the metal thin film, multiple sections of the circuit structure are arranged in a U-shaped structure and connected in series on the metal thin film.

[0016] The circuit structure on the front surface of the intermediate layer and the circuit structure on the back surface of the intermediate layer are the same in projection on the plane of the intermediate layer or are arranged in a staggered manner.

[0017] Optionally, the circuit structure includes multiple parallel conductive lines.

[0018] Optionally, the loudspeaker assembly further includes a force rib structure connected to the diaphragm.

[0019] The force rib structure includes a transverse force rib and / or a longitudinal force rib.

[0020] Optionally, the force rib structure is arranged on the intermediate layer, or the force rib structure is bonded to the front surface or the back surface of the diaphragm.

[0021] Optionally, the loudspeaker assembly further includes an elastic suspension assembly arranged at the edge of the diaphragm.

[0022] Alternatively, the elastic suspension assembly is connected to the intermediate layer.

[0023] Optionally, the elastic suspension assembly is an elastic strip arranged on both sides or all around the diaphragm, one side of the elastic strip is connected to the intermediate layer, and the other side extends outward.

[0024] In the technical scheme provided in the embodiments of the present application, the continuous metal thin film is arranged on the intermediate layer, the circuit structure is bent from the front surface of the intermediate layer to the back surface of the intermediate layer without interruption, and the circuit structure on the front surface of the intermediate layer and the circuit structure on the back surface of the intermediate layer do not need to be connected by welding. In this way, the welding frequency of the circuit is effectively reduced, the processing efficiency is improved, and the quality of the diaphragm is better. In addition, the weight of the diaphragm can be reduced, and the efficiency and high-pitch quality of the diaphragm are better.

[0025] In one embodiment of the present application, a loudspeaker assembly is provided, which includes:

[0026] Two groups of first magnets are arranged in a spaced-apart and opposite manner, and an opposite gap is formed between the two groups of first magnets.

[0027] Two diaphragms are arranged in the opposite gap in a spaced-apart manner, and the diaphragms are provided with a circuit.

[0028] a second magnet group is arranged between two diaphragms which are spaced apart;

[0029] wherein each of the first magnet groups comprises at least one first magnet unit and at least one second magnet unit, the second magnet group comprises at least one second magnet unit, and the plurality of magnet units in the first magnet group are arranged in a Halbach array.

[0030] Optionally, the first magnet group and the second magnet group are arranged in the same direction as the diaphragm, and a gap is arranged between adjacent first magnet groups and second magnet groups.

[0031] The diaphragm is arranged parallel to the first magnet group and the second magnet group, and is located between the first magnet group and the second magnet group.

[0032] Optionally, the magnetic field direction inside the first magnet unit is perpendicular to the diaphragm, and the magnetic field direction inside the second magnet unit is parallel to the diaphragm.

[0033] In the first magnet group, the first magnet unit and the second magnet unit are arranged in a Halbach array, and the first magnet units in two first magnet groups are placed in opposite poles.

[0034] In the second magnet group, the magnetic field directions inside adjacent second magnet units are opposite.

[0035] Optionally, along the diaphragm, the second magnet units in the second magnet group are arranged corresponding to the second magnet units in the first magnet groups on both sides.

[0036] The magnetic field directions inside the second magnet units in the second magnet group are consistent with the magnetic field directions inside the second magnet units in the first magnet group.

[0037] Optionally, the second magnet units in the second magnet group are located at the projections of the second magnet units in the first magnet group on the second magnet group.

[0038] Alternatively, the second magnet units in the second magnet group are located in the projections of the first magnet units in the first magnet group on the second magnet group.

[0039] Optionally, the first magnet group and the second magnet group are fixedly arranged on the shell, and the diaphragm is connected to the shell or the magnet unit through a suspension assembly.

[0040] Optionally, the suspension assembly is arranged at two ends or around the diaphragm.

[0041] Optionally, the circuits on two different diaphragms are connected in series or in parallel or powered independently.

[0042] In another embodiment of the present application, a loudspeaker device is also provided, comprising a sound body and the loudspeaker assembly described above.

[0043] The sound body has a receiving cavity, and the loudspeaker assembly is arranged in the receiving cavity.

[0044] Optionally, the sound body is provided with sound transmission holes on opposite side walls, respectively.

[0045] The sound transmission holes are arranged corresponding to the gap between the first magnet unit and the second magnet unit in the first magnet group.

[0046] Optionally, the cross-sectional shape of the sound body is one of a circle, a square, an ellipse, and a polygon.

[0047] In the technical scheme provided in the embodiments of the present application, by arranging the diaphragm in the two rows of oppositely arranged Halbach array magnet groups, not only can the magnetic field in the opposite gap be strengthened, but also the magnetic field outside the magnet group can be weakened, so that the metal such as iron is not easily adsorbed outside the magnet group, effectively improving the safety of the device, and also making the effective magnetic field of the loudspeaker assembly stronger and more efficient.

[0048] In one embodiment of the present application, a loudspeaker assembly is provided, comprising:

[0049] Two groups of magnet groups are oppositely arranged with a gap therebetween;

[0050] At least one diaphragm is arranged in the gap, and the diaphragm is provided with a conductive circuit;

[0051] Each group of magnet groups comprises a plurality of first-type magnet units and a plurality of second-type magnet units, and the plurality of first-type magnet units and the plurality of second-type magnet units are arranged in a radial manner and in a Halbach array manner.

[0052] The first-type magnet units in the two groups of magnet groups are oppositely arranged with the same polarity, and the magnetic pole direction of the second-type magnet units in the two groups of magnet groups is parallel to the surface of the diaphragm.

[0053] Optionally, the lengths of the same type of magnet units in the two groups of magnet groups are the same, and the plurality of magnet units are arranged in a radial manner in a ring-shaped area.

[0054] The circular and / or annular diaphragm is arranged in the gap.

[0055] Optionally, it also includes a flexible suspension assembly and a housing;

[0056] The magnet assembly is connected to the housing, and one end of the elastic suspension assembly is connected to the diaphragm, while the other end is connected to the magnet unit or the housing.

[0057] Optionally, it also includes a magnetic conductor, and each of the magnet assemblies is provided with the magnetic conductor;

[0058] The magnetic guide component includes multiple magnetic guide arms, which converge and connect at the center of the magnet assembly, and each of the multiple magnetic guide arms is in contact with and connected to the first type of magnet unit.

[0059] Optionally, the conductive circuit includes an inner loop circuit and an outer loop circuit;

[0060] The diaphragm has a first circuit setting area and a second circuit setting area. The first circuit setting area is the outer ring area of ​​the diaphragm, and the second circuit is set inside the ring located in the first circuit setting area.

[0061] The outer loop circuit is located in the first circuit setting area, and the inner loop circuit is located in the second circuit setting area.

[0062] Optionally, based on the projection pattern of the first type of magnet unit on the diaphragm, the conductive circuit is arranged sequentially around the projection pattern of each of the first type of magnet units.

[0063] Optionally, the conductive circuit is disposed on the front side of the diaphragm, or the conductive circuit is disposed on both the front and back sides of the diaphragm;

[0064] When the circuit is provided on both the front and back sides of the diaphragm, the circuit on the front side and the circuit on the back side are connected in parallel or in series.

[0065] The conductive circuit includes at least one conductive line.

[0066] Optionally, the diaphragm includes an intermediate layer and a metal thin film, the metal thin film being disposed on the intermediate layer, and the conductive circuit being formed on the metal thin film.

[0067] Optionally, the diaphragm further includes a rib structure disposed on the diaphragm.

[0068] In another embodiment of this application, a loudspeaker device is also provided, including a device body and a loudspeaker assembly as described above;

[0069] The device body has a receiving cavity, and the speaker assembly is disposed within the receiving cavity.

[0070] Optionally, when a plurality of diaphragms are included in the loudspeaker assembly and arranged in parallel and spaced apart;

[0071] The device is provided with a sound outlet hole, which is arranged towards the back space area of the two diaphragms.

[0072] The arrangement mode of the plurality of magnet units in the magnet group 108 arranged on both sides of the diaphragm is a Halbach array, which not only can strengthen the magnetic field in the opposing gap, but also can weaken the magnetic field outside the magnet group, so that the metal such as iron is not easily adsorbed outside the magnet group, effectively improving the safety of the device, and also making the sound quality of the sound unit better.

[0073] The embodiment of the present application adopts the following technical scheme:

[0074] A diaphragm suspension structure comprises:

[0075] a diaphragm having opposite fixed sides and free sides; and

[0076] a fixed assembly arranged on an entity, the fixed assembly having a magnetic field, and the diaphragm being located in the magnetic field;

[0077] The fixed side is arranged on the entity, and the edge of the fixed side is in abutment with the entity; the height of the entity is greater than or equal to the height of the diaphragm.

[0078] As a preferred, the fixed side is fixed on the entity or the fixed assembly; or

[0079] The fixed side can move relative to the entity or the fixed assembly.

[0080] As a preferred, the fixed assembly comprises:

[0081] a plurality of fixed frames, one side of the fixed frame being a fixed side and the other side being a diaphragm mounting side;

[0082] The fixed side is provided with a clamping groove, and the side of the entity is clamped in the clamping groove to lock the fixed assembly and the entity;

[0083] The diaphragm mounting side is provided with a diaphragm mounting groove, and the side walls on both sides of the diaphragm mounting groove are provided with magnet mounting grooves opening towards each other, and two magnets with the same polarity opposite to each other are accommodated in the magnet mounting grooves on the corresponding side;

[0084] The inner side wall of the diaphragm mounting groove is provided with a diaphragm clamp, and the fixed side is clamped on the diaphragm clamp.

[0085] Preferably, the clamping member is provided with an abutting member, and the two sides of the fixed side are in abutment with the abutting member.

[0086] Preferably, the plurality of fixing frames are stacked in sequence along the height direction.

[0087] Preferably, the fixing frames are two, and each side of the diaphragm is provided with one fixing frame.

[0088] Preferably, the solid body is provided with the diaphragm suspension structure at both ends.

[0089] Preferably, the solid body is a solid wall, a screen, a television, a picture frame or a power amplifier device box.

[0090] Preferably, the diaphragm is made of hard material.

[0091] The diaphragm is provided with a conductive circuit at both sides along the long side direction, and the two conductive circuits have a distance therebetween; and

[0092] A fixing assembly is located at the center of the diaphragm, and the diaphragm is arranged on the fixing assembly.

[0093] Another purpose of the embodiment of the present application is to provide a sound-emitting device with good bass quality.

[0094] To achieve the above purpose, the embodiment of the present application adopts the following technical solution.

[0095] The sound-emitting device comprises the diaphragm suspension structure as described above.

[0096] The technical solution provided by the embodiment of the present application can ensure that the diaphragm timely converts the current signal into sound for propagation by arranging the diaphragm in the magnetic field of the fixing assembly, and can ensure good bass effect by arranging the fixed side of the diaphragm on the solid body, arranging the edge of the fixed side in abutment with the solid body, and arranging the length of the side of the solid body away from the fixed side to be greater than the diffraction side length of the bass sound wave. BRIEF DESCRIPTION OF DRAWINGS

[0097] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0098] Fig. 1 is a structural diagram of a diaphragm provided by the embodiment of the present application;

[0099] Fig. 2 is a structural diagram of another diaphragm provided by an embodiment of the present application;

[0100] Fig. 3 is an expanded view of a metal film and circuit structure provided by an embodiment of the present application;

[0101] Fig. 4 is an expanded view of another metal film and circuit structure provided by an embodiment of the present application;

[0102] Fig. 5 is a front view of a diaphragm provided by an embodiment of the present application;

[0103] Fig. 6 is a front view of another diaphragm provided by an embodiment of the present application;

[0104] Fig. 7 is a structural diagram of a diaphragm and rib structure provided by an embodiment of the present application;

[0105] Fig. 8 is a sectional view of a sound production unit provided by an embodiment of the present application;

[0106] Fig. 9 is a magnetic field diagram of a counter magnet provided by an embodiment of the present application;

[0107] Fig. 10 is a structural diagram of a loudspeaker assembly provided by an embodiment of the present application;

[0108] Fig. 11 is a top view of a loudspeaker assembly provided by an embodiment of the present application;

[0109] Fig. 12a is a magnetic field effect diagram of a loudspeaker assembly provided by an embodiment of the present application;

[0110] Fig. 12b is a schematic diagram of different configurations of a loudspeaker assembly provided by an embodiment of the present application;

[0111] Fig. 13 is a perspective view of a loudspeaker assembly provided by an embodiment of the present application;

[0112] Fig. 14 is a structural diagram of another loudspeaker assembly provided by an embodiment of the present application;

[0113] Fig. 15 is a perspective view of a loudspeaker device provided by an embodiment of the present application;

[0114] Fig. 16 is a structural diagram of still another loudspeaker assembly provided by an embodiment of the present application;

[0115] Fig. 17 is a sectional view of a loudspeaker device provided by an embodiment of the present application;

[0116] Fig. 18 is a sectional view of another loudspeaker device provided by an embodiment of the present application;

[0117] Fig. 19 is a schematic diagram of a sound field of a loudspeaker device provided by an embodiment of the present application;

[0118] FIG. 20 is a schematic diagram of a magnetic field of a pair of opposing magnets according to an embodiment of the present application;

[0119] FIG. 21 is a perspective view of a loudspeaker assembly according to an embodiment of the present application;

[0120] FIG. 22a is a perspective view of another loudspeaker assembly according to an embodiment of the present application;

[0121] FIG. 22b is a cross-sectional view of the loudspeaker assembly of FIG. 22a according to an embodiment of the present application;

[0122] FIG. 23 is a perspective view of a further loudspeaker assembly according to an embodiment of the present application;

[0123] FIG. 24 is a front view of a loudspeaker assembly according to an embodiment of the present application;

[0124] FIG. 25 is a front view of a diaphragm according to an embodiment of the present application;

[0125] FIG. 26 is a back view of a diaphragm according to an embodiment of the present application;

[0126] FIG. 27 is a front view of a diaphragm according to an embodiment of the present application;

[0127] FIG. 28 is a semi-cross-sectional view of a loudspeaker device according to an embodiment of the present application;

[0128] FIG. 29 is a schematic diagram of a magnetic field formed by a pair of homopolar opposing magnets according to an embodiment of the present application;

[0129] FIG. 30 is a schematic diagram of a magnetic field formed by a plurality of pairs of homopolar opposing magnets according to an embodiment of the present application;

[0130] FIG. 31 is a schematic diagram of a diaphragm suspension structure according to an embodiment of the present application;

[0131] FIG. 32a is a schematic diagram of a diaphragm suspension structure according to an embodiment of the present application;

[0132] FIG. 32b is a schematic diagram of a single-sided fixing frame according to an embodiment of the present application;

[0133] FIG. 33 is a front view of a fixing assembly according to an embodiment of the present application;

[0134] FIG. 34 is a top view of a fixing assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0135] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application. In the entire specification and claims, the term “comprising” is an open term, which should be interpreted as “including but not limited to”. “Substantially” means that a person of ordinary skill in the art can solve the technical problems within a certain error range and basically achieve the technical effects. In addition, in the embodiments of the present application, multiple means two or more. A person of ordinary skill in the art can combine and combine the features of different embodiments or examples described in the specification and the features of different embodiments or examples in the present application without contradiction.

[0136] Referring to FIG. 1 and FIG. 2, in one embodiment of the present application, a diaphragm is provided, which comprises: a middle layer 1 and a metal film 2. The middle layer 1 is used to provide support force for the diaphragm, and the metal film 2 is attached to the surface of the middle layer 1 and covers the front and back surfaces of the middle layer 1. It can be understood that the length of the metal film 2 is substantially equal to twice the length of the middle layer 1, and after the metal film 2 is folded, the middle layer 1 is located at the middle position, one half of the metal film 2 is located on the front surface of the middle layer 1, and the other half of the metal film 2 is located on the back surface of the middle layer 1. The metal film 2 is bent at the edge of the middle layer 1, so as to realize the transition from the front surface of the middle layer 1 to the back surface of the middle layer 1.

[0137] The metal film 2 is provided with a circuit structure 4, and the circuit structure 4 is bent at the edge of the middle layer 1 and extends uninterruptedly from the front surface of the middle layer 1 to the back surface of the middle layer 1. It can be understood that the circuit structure 4 on the front surface of the middle layer 1 and the circuit structure 4 on the back surface of the middle layer 1 are connected uninterruptedly, and the circuits on both sides are connected in series to form a complete circuit.

[0138] Generally, when the front surface and the back surface of the middle layer 1 are provided with the circuit structure 4, the two side edges of the middle layer 1 need to be welded one by one, so as to connect the circuit on the front surface and the circuit on the back surface together. However, when the number of the circuit structure 4 is too large, the welding will be a huge workload, and as long as one of the circuit structure 4 is not welded well, it may seriously affect the performance of the entire circuit structure 4. This welding method not only has a huge workload, but also cannot effectively guarantee the quality. In addition, the connection of the circuit by welding will bring a more serious problem, that is, it will increase the weight of the diaphragm. After the weight of the diaphragm is increased, the vibration efficiency of the diaphragm will be significantly reduced, in addition, increasing the weight of the diaphragm will also affect the high frequency response and transient characteristics. Therefore, it is particularly important to design a circuit structure which can fully utilize the magnetic field vibration sound and does not bring extra weight to the diaphragm.

[0139] In the technical scheme provided in the present application, the metal film 2 is arranged on the surface of the intermediate layer 1 after being folded, and the circuit structure 4 is continuously extended from the front surface of the intermediate layer 1 to the back surface of the intermediate layer 1 after being folded, so that the welding times of the circuit structure 4 on the front surface and the back surface of the intermediate layer 1 are reduced, the processing efficiency is improved while the integrity of the circuit structure 4 is ensured, and the mass of the diaphragm is also lighter.

[0140] In one embodiment, the intermediate layer 1 is an EVA (Ethylene Vinyl Acetate Copolymer) layer, which has certain rigidity and toughness and can effectively support the diaphragm. The EVA layer is provided with metal layers such as aluminum foil on both sides. Generally, glue can be brushed on both surfaces of the EVA layer, and then the aluminum foil layers are bonded to the surfaces of the EVA layer. The surface of the aluminum foil layer forms the circuit structure 4. After the circuit structure 4 in the magnetic field is powered, the entire diaphragm can be driven to vibrate. The specific material of the intermediate layer 1 is not limited in the present application. For example, the material of the intermediate layer 1 includes but is not limited to plastic sheet, thin wood board, carbon fiber sheet, hardboard, metal sheet, polymer material plate, composite material plate, etc. In addition, in order to ensure that the diaphragm has certain energy absorption properties, the intermediate layer 1 can also be some light energy-absorbing materials, such as nylon net covered with adhesive layer, thin rubber, thin silica gel, polymer glue layer, glass fiber adhesive tape, etc.

[0141] In addition, the material of the metal film 2 includes but is not limited to aluminum, gold, silver, aluminum-magnesium alloy, copper, etc.

[0142] Referring to FIG. 1, in one embodiment provided in the present application, the circuit structure 4 is extended from the front surface of the intermediate layer 1 to the back surface of the intermediate layer 1 after being folded with the metal film 2 on the first side edge of the intermediate layer 1. The breakpoint of the circuit structure 4 at the leading end of the metal film 2 is connected to the breakpoint of the circuit structure 4 at the trailing end of the metal film 2 by welding. Generally, a plurality of circuit structures 4 are arranged on the front surface and the back surface of the intermediate layer 1, and the plurality of circuit structures 4 are extended from the front surface to the back surface and then from the back surface to the front surface, and the circuit structure 4 is a structure of circular winding. However, since the leading end and the trailing end of the metal film 2 are disconnected, the circuit needs to be connected into a complete loop by welding.

[0143] In addition, in one embodiment provided by the present application, referring to FIG. 2, the metal film 2 is in a closed structure with the head connected to the tail, and the circuit structure 4 extends from the front surface of the intermediate layer 1 to the back surface of the intermediate layer 1 after the metal film 2 is bent from the first side and the second side of the intermediate layer 1. The metal film 2 is connected at the head and the tail to form a structure similar to a circular track, and the intermediate layer 1 is arranged between the metal diaphragms. The circuit structures 4 on the metal diaphragms are also connected to form a complete loop, which can further reduce the welding of the circuit, and theoretically only the positive and negative terminals of the circuit need to be welded.

[0144] Referring to FIGS. 2 and 3, in one embodiment, a metal film 2 with a proper length can be cut first, then folded along the folding line H and bonded to the intermediate layer 1 through the adhesive layer 3, the entire edge of the head and the tail of the metal film 2 is connected by welding (for example, ultrasonic welding, laser welding, brazing, etc.), and then the circuit structure 4 is processed on the front surface and the back surface of the metal film 2, respectively, and the circuit structures 4 on the front surface and the back surface are connected to form a complete loop.

[0145] For the above technical solutions, the circuit structure 4 can be processed on the metal film 2 first, and then bonded to the intermediate layer 1, or the metal film 2 can be bonded to the intermediate layer 1 first, and then the circuit structure 4 is processed. The processing of the circuit structure 4 includes but is not limited to etching, mechanical processing, laser engraving, etc.

[0146] Referring to FIG. 3, in one embodiment provided by the present application, along the width direction of the metal film 2, a plurality of U-shaped circuit structures 4 are arranged on the metal film 2 in a head-to-tail manner. One of the U-shaped circuit structures 4 in the dashed box A in FIG. 3 can be considered as a U-shaped circuit structure 4. The plurality of U-shaped circuit structures 4 are arranged in a head-to-tail manner along the length direction of the diaphragm (the arrow X direction in the figure), and the extension direction (the arrow Y direction in the figure) of each U-shaped circuit structure 4 is in the same direction as the width direction of the diaphragm. In addition, the circuit structure 4 can also be in an S-shaped or Z-shaped structure, etc. It should be noted that the number of the circuit structures 4 is not limited in the present application, and a few U-shaped circuit structures 4 can be connected as shown in FIG. 3, or a plurality of U-shaped circuit structures 4 can be connected as shown in FIG. 4, and the circuit structure and the magnetic system are arranged in strict correspondence.

[0147] Further, in one embodiment of the present application, the circuit structure 4 on the front side of the intermediate layer 1 is mirror-symmetrical to the circuit structure 4 on the back side of the intermediate layer 1. In another embodiment of the present application, in order to optimize the stress on the diaphragm and ensure that the stress on each region of the diaphragm is uniform, the projection of the circuit structure 4 on the front side of the intermediate layer 1 on the plane of the intermediate layer 1 can be different from the projection of the circuit structure 4 on the back side of the intermediate layer 1 on the plane of the intermediate layer 1, as shown in FIG. 4.

[0148] In order to optimize the stress on the diaphragm, in another embodiment of the present application, the circuit structure 4 on the front side of the intermediate layer 1 is misaligned with the circuit structure 4 on the back side of the intermediate layer 1 on the plane of the intermediate layer 1.

[0149] In one embodiment of the present application, the circuit structure 4 includes a plurality of parallel conductive lines. In the width direction of the diaphragm, the starting point and the tail end of each conductive line are misaligned, and the adjacent conductive lines are aligned at the break points on both sides of the diaphragm. Specifically, in one specific example, the circuit structure 4 includes six parallel conductive lines. The starting point a1 and the tail end a2 of the conductive line a are misaligned in the width direction of the diaphragm, and the height of the starting point a1 is greater than that of the tail end a2. The starting point a1 can be used as the positive terminal of the entire circuit structure 4.

[0150] In the width direction of the diaphragm (arrow Y direction), the tail end a2 of the conductive line a and the starting point b1 of the conductive line b are aligned, and when the two sides of the metal film 2 are connected to each other, the tail end a2 will also be connected to the starting point b1. By analogy, the tail end b2 of the conductive line b and the starting point c1 of the conductive line c are aligned. Finally, the tail end f2 of the conductive line f can be used as the negative terminal of the entire circuit structure 4.

[0151] Further, when the diaphragm is arranged in a group of same-pole opposite magnet groups, the magnetic field strength at different regions on the diaphragm is different, so the widths of the plurality of conductive lines in the circuit structure 4 are the same or different. As shown in FIG. 3, the widths of the conductive line a and the conductive line c are substantially the same, the width of the conductive line a is greater than that of the conductive line b, and the width of the conductive line b is greater than that of the conductive line e. In the technical solution of the present application, the magnetic field changes in each region during the vibration of the diaphragm need to be simulated, so that the widths of the conductive lines in each region are designed, so that the diaphragm is more stable during vibration in the final design.

[0152] Referring to Fig. 5, in one embodiment, the diaphragm further comprises an elastic suspension assembly 5, which is arranged at the edge of the diaphragm and connected to the diaphragm. The elastic suspension assembly 5 includes, but is not limited to, a spring, an elastic cord, an elastic support, an elastic strip, etc. In one specific embodiment, the elastic suspension assembly 5 is an elastic cord, and the diaphragm is provided with a mounting structure at each corner thereof, the mounting structure being a mounting hole, one end of the elastic cord being connected to the mounting hole, and the other end being connected to the shell of the acoustic device, so that the diaphragm can be suspended in the acoustic device.

[0153] Referring to Fig. 6, in another specific embodiment, the elastic suspension assembly 5 is an elastic strip, which is arranged on the two sides or the periphery of the diaphragm, one side of the elastic strip being connected to the diaphragm, and the other side extending outward. The length of the elastic strip can be the same as or different from the side length of the diaphragm. The end of the elastic strip extending outward is connected to the shell of the acoustic device, so that the diaphragm can be stably suspended in the acoustic device.

[0154] Referring to Fig. 7, in one embodiment, a force bar structure 6 is further arranged on the intermediate layer 1 or the outer surface of the diaphragm. The force bar structure 6 is connected to the intermediate layer 1, for example, the force bar structure 6 is arranged in the structure of the intermediate layer 1, similar to the framework of the intermediate layer 1, so as to enhance the rigidity of the intermediate layer 1. Alternatively, the force bar structure 6 can be adhered to the front or back surface of the diaphragm. Taking the case that the force bar structure 6 is arranged on the surface of the diaphragm as an example, the metal film 2 is adhered to the intermediate layer 1 to form the diaphragm, and then the force bar structure 6 is adhered to the surface of the diaphragm.

[0155] The force bar structure 6 includes, but is not limited to, a carbon fiber rod, a plastic tube, a wooden rod, etc. Alternatively, the force bar structure can be a paper folding structure made of the material of the diaphragm, for example, the cross-sectional shape of the paper folding structure is v-shaped, T-shaped, M-shaped, etc.

[0156] The diaphragm is mainly arranged in the opposing gap formed by the opposing magnets, and the width of the opposing gap can be considered as the limit vibration space of the diaphragm. Since the reinforcing structure 6 has a certain thickness, the reinforcing structure 6 increases the thickness direction size of the diaphragm, thereby reducing the vibration space of the diaphragm. To improve this problem, in an embodiment provided in the present application, referring to FIG. 7, when the diaphragm is combined with the magnet unit to form a sound generating unit, the diaphragm has a projection corresponding to the magnet unit as shown in FIG. 8. Referring to FIG. 8, the magnet units 9 are arranged above the front surface and the back surface of the diaphragm. The dashed box in FIG. 7 represents the position of the magnet unit 9 (i.e., the projection 8 of the magnet unit 9), and the magnet units 9 on the front and back surfaces of the diaphragm are arranged with the same polarity. It can be understood that the magnet units 9 on the front and back surfaces of the diaphragm have the same magnetic pole facing the diaphragm. Among the plurality of magnet units 9 in the same row on the front or back surface of the diaphragm, the adjacent magnet units 9 have opposite magnetic poles facing the diaphragm. The reinforcing structure 6 includes transverse reinforcing structures and / or longitudinal reinforcing structures 61. As shown in FIGS. 7-8, taking the transverse reinforcing structure 61 (the position of the dashed straight line in FIG. 7) as an example, a plurality of transverse reinforcing structures 61 are arranged on the diaphragm, and the transverse reinforcing structure 61 is arranged on the surface of the diaphragm. Each transverse reinforcing structure 61 is located between two adjacent projections 8, and the vibration space of the transverse reinforcing structure 61 is located in the gap between the two adjacent magnets. In this way, the reinforcing structure does not occupy the vibration space of the diaphragm when the diaphragm vibrates.

[0157] In summary, in the technical solution provided in the embodiments of the present application, the metal film is folded in half and arranged on the surface of the intermediate layer. The circuit structure is bent and continuously extended from the front surface of the intermediate layer to the back surface of the intermediate layer, thereby effectively reducing the number of times of welding the circuit structure on the front surface and the back surface of the intermediate layer. The processing efficiency is improved while ensuring the integrity of the circuit structure, and the diaphragm is lighter. For complex circuit structures, the circuit structures can also be efficiently and quickly processed.

[0158] The sound quality of a planar diaphragm loudspeaker is related to the magnetic field strength and uniformity at the diaphragm. When the diaphragm is in a magnetic field environment with high uniformity, the diaphragm can not only emit louder sound, but also the sound quality is better. In order to obtain a higher strength and more uniform magnetic field, referring to FIG. 9, two magnets are usually arranged in a same-pole opposite manner, and an opposite gap (region A) is formed between the two magnets. The magnetic field strength in the opposite gap will be significantly improved. Although this method can meet the requirement of the diaphragm for high magnetic field strength, there is always a magnetic field on both sides (region B) of the magnet pair. The magnetic field not only cannot be effectively used, but also is easy to attract metals such as iron, cobalt, and nickel. Specifically, in a loudspeaker device, the opposite magnets are usually arranged in a housing with a receiving cavity. When the size of the cabinet is small, the magnetic field in the region B on both sides of the magnet pair will cause the space outside the cabinet to also be in the magnetic field range of the region B. If the metals such as iron, cobalt, and nickel are close to the cabinet at this time, these materials will be easily attracted outside the cabinet. The strong magnetic attraction force not only easily damages the loudspeaker device, but also easily injures the user. If the size of the cabinet is increased to solve this problem, it is not cost-effective. In addition, when the diaphragm 307 vibrates, the cabinet will be subjected to a force and vibrate. At this time, the loudspeaker body needs to be specially treated for shock absorption, but the effect of shock absorption is difficult to be perfect.

[0159] In order to avoid the generation of excess strong magnetic field on the outside of the opposite magnet pair, more efficiently use the magnetic field, and solve the above problems by changing the vibration mode of the diaphragm 307, the present application provides a loudspeaker assembly and a loudspeaker device.

[0160] Referring to FIGS. 10 and 11, in one embodiment of the present application, a loudspeaker assembly is provided, which includes two groups of first magnet groups 107, two diaphragms 307, and a second magnet group 207. The two groups of first magnet groups 107 are arranged in an opposite manner, and the opposite two groups of first magnet groups 107 and the second magnet group 207 form an opposite gap therebetween. The opposite gap can be understood as the position of region C in FIG. 11. The two diaphragms 307 are arranged in the opposite gap, and the two diaphragms 307 are parallel to each other and parallel to the arrangement direction of the first magnet group 107. The diaphragm 307 is provided with a circuit. When a signal current is applied to the circuit, the circuit will drive the two diaphragms 307 to vibrate in opposite directions. As shown in FIG. 10, in a specific embodiment, one of the vibration directions of the diaphragm 307 is in the same direction as the arrow X direction in FIG. 10, the arrangement direction of the first magnet group 107 is in the same direction as the arrow Y direction, and the length direction of the first magnet group 107 is in the same direction as the arrow Z direction.

[0161] The number of diaphragms 307 in the loudspeaker assembly is two, the loudspeaker assembly includes two groups of first magnet groups 107 and one group of second magnet groups 207, and the two diaphragms 307 are respectively arranged on the two sides of the second magnet group 207, and the two groups of first magnet groups 107 are respectively located on the outer side of the different diaphragms 307. Referring to FIG. 10, along the width direction of the loudspeaker assembly (such as the X direction in FIG. 10), the first magnet group 107, the diaphragm 307, the second magnet group 207, the diaphragm 307, and the first magnet group 107 are sequentially and spacedly arranged.

[0162] The arrangement direction of the second magnet group 207 is the same as that of the first magnet group 107. Each group of first magnet groups 107 includes at least one first magnet unit 1107 and at least one second magnet unit 2107, and the second magnet group 207 includes at least one second magnet unit 2107, wherein the arrangement mode of the first magnet unit 1107 and the second magnet unit 2107 in the first magnet group 107 is a Halbach array.

[0163] The second magnet unit 2107 in the second magnet group 207 mainly functions to jointly act with the magnetic fields of the two first magnet groups 107 in the Halbach array to generate a stronger and more uniform magnetic field in the gap on both sides of the second magnet group 207.

[0164] It should be noted that the first magnet unit 1107 and the second magnet unit 2107 are two types of magnet units with different pole directions. Referring to FIG. 11, the pole direction (the direction of the magnetic field inside the magnet, hereinafter referred to as the pole direction) of the first magnet unit 1107 is perpendicular to the width of the diaphragm 307, and the pole direction of the second magnet unit 2107 is parallel to the width of the diaphragm 307. The magnet units included in the second magnet group 207 are all second magnet units 2107. The pole directions of the two adjacent second magnet units 2107 in the second magnet group 207 are both parallel to the width of the diaphragm 307, but the directions of the pole directions of the adjacent different second magnet units 2107 are opposite. For example, in FIG. 11, the second magnet group 207 includes two second magnet units 2107, one of which has a pole direction pointing upward, and the other of which has a pole direction pointing downward. In one possible embodiment, as shown in FIG. 11, the number of second magnet units 2107 in the second magnet group 207 is equal to the number of second magnet units 2107 in the first magnet group 107, and the projection positions of the two magnet units on the diaphragm 307 are the same. The pole directions of the second magnet units 2107 in the same row are the same. In another possible embodiment, referring to FIG. 12b, the number of second magnet units 2107 in the second magnet group 207 is greater than the number of second magnet units 2107 in the first magnet group 107, and the projection of the second magnet units 2107 in the second magnet group 207 on the diaphragm 307 is located on both sides of the projection of the first magnet units 1107 in the first magnet group 107.

[0165] The Halbach array is a magnet arrangement structure, which is an approximately ideal magnet arrangement structure in engineering. The Halbach array can generate a relatively strong magnetic field with a small number of magnets. In addition, when a column of magnets is a Halbach array, the magnetic field strength on one side of the column of magnets will be strengthened, and the magnetic field on the other side will be weakened.

[0166] Referring to FIG. 11, because the arrangement of the plurality of magnet units in the first magnet group 107 is a Halbach array, the magnetic field in the C region in FIG. 11 is effectively strengthened, and the magnetic field in the D region in FIG. 11 is effectively weakened. Therefore, it is not easy to adsorb metal such as iron outside the magnet group, effectively improving the safety of the device, and also making the sound quality of the loudspeaker assembly better. The direction of the arrow in FIG. 11 is the direction of the magnetic field inside the magnet unit.

[0167] In the technical solution of the present application, a second magnet group 207 is arranged in the two first magnet groups 107, and the second magnet group 207 can interact with the magnetic field of the two first magnet groups 107 respectively, so that the magnetic field in the gap between each first magnet group 107 and the second magnet group 207 is strengthened, and the magnetic field outside each first magnet group 107 is weakened. Not only the magnetic field of the effective area is strengthened, but also the safety of the loudspeaker assembly is improved.

[0168] Referring to FIG. 9, in one embodiment provided by the present application, along the length direction of the loudspeaker assembly (the direction of arrow Y in the figure), the arrangement direction of the first magnet group 107 is the same as that of the second magnet group 207, and the diaphragm 307 is arranged parallel to the first magnet group 107 and the second magnet group 207 respectively. It can be understood that one side of the diaphragm 307 faces the first magnet group 107, and the other side faces the second magnet group 207. The diaphragm 307 is arranged separately from the first magnet group 107 and the second magnet group 207, and the distance between the diaphragm 307 and the first magnet group 107 can be the same as or different from the distance between the diaphragm 307 and the second magnet group 207.

[0169] As shown in FIG. 10, the arrangement direction of the first magnet group 107 is the same as the direction of arrow Y (the length direction of the loudspeaker assembly), and the length direction of the first magnet group 107 is the same as the direction of arrow Z (the height direction of the loudspeaker assembly). However, the arrangement direction of the first magnet group 107 and the length direction of the first magnet group 107 are not specifically limited in the present application, and the above is only one specific example. However, the arrangement direction of the second magnet group 207 is consistent with that of the first magnet group 107 at any time.

[0170] Further, referring to FIG. 11 and FIG. 13, along the width direction of the loudspeaker assembly, the second magnet unit 2107 in the second magnet group 207 is arranged on both sides of one second magnet unit 2107 in the first magnet group 107 respectively, and the magnetic pole directions of the corresponding arranged second magnet units 2107 are the same. Referring to FIG. 12a, due to the effect of the second magnet unit 2107, the magnetic field in region E in the figure is in the same direction as the arrangement direction of the diaphragm 307, and the magnetic field intensity in region E in the figure can be effectively enhanced.

[0171] Referring to FIG. 12b, the present application provides a plurality of different configurations of the loudspeaker assembly, in which the number of the magnet units in the first magnet group 107 and the second magnet group 207 is different. For example, in FIG. a, each of the first magnet group 107 includes one first magnet unit 1107 and two second magnet units 2107, and the second magnet group 207 includes two second magnet units 2107. For another example, in FIG. c, each of the first magnet group 107 includes two first magnet units 1107 and one second magnet unit 2107, and the second magnet group 207 includes one second magnet unit 2107. For another example, in FIG. d, each of the first magnet group 107 includes two first magnet units 1107 and three second magnet units 2107, and the second magnet group 207 includes three second magnet units 2107. For another example, in FIG. e, each of the first magnet group 107 includes three first magnet units 1107 and four second magnet units 2107, and the second magnet group 207 includes four second magnet units 2107. In theory, there are infinite configurations of the loudspeaker assembly. In general, regardless of the configuration of the loudspeaker assembly, the number of the magnet units in the two first magnet groups 107 is the same, and the number of the second magnet units 2107 in the second magnet group 207 is greater than or equal to the number of the second magnet units 2107 in the first magnet group 107.

[0172] Referring to FIG. 14 and FIG. 15, the loudspeaker assembly further includes a housing 507, and the first magnet group 107 and the second magnet group 207 are fixedly arranged on the housing 507. Specifically, each of the first magnet unit 1107 and the second magnet unit 2107 in the first magnet group 107 can be connected to the housing 507 by direct bonding or fastened to the housing 507 by fasteners. The second magnet unit 2107 in the second magnet group 207 can be connected to the housing 507 by bonding at both ends.

[0173] In order to ensure the stability between the plurality of magnet units and facilitate the installation of the magnet group, referring to FIG. 13, in an embodiment provided by the present application, the loudspeaker assembly further includes a fixing bracket 807, and the plurality of magnet units are fixedly arranged on the fixing bracket 807, so as to ensure the position fixation between the plurality of magnet units. When installing the magnet group, the fixing bracket 807 is arranged in the housing 507, and the installation of the plurality of magnet units is completed.

[0174] In one embodiment, the speaker assembly includes outer supports 8207 and a sandwich support 8107, which is disposed between the two outer supports 8207 and spaced apart from the outer supports 8207. The first magnet group 107 is disposed on the outer supports 8207, and the second magnet group 207 is disposed on the sandwich support 8107. The first magnet group 107 includes a plurality of spaced-apart magnet units, and the outer supports 8207 are provided with a plurality of magnet mounting positions, in which the plurality of magnet units are disposed. The sandwich support 8107 is also provided with a plurality of magnet mounting positions, and the second magnet units 2107 are disposed in the magnet mounting positions. The plurality of second magnet units 2107 in the second magnet group 207 have substantially the same thickness as the sandwich support 8107. The plurality of magnet units in the first magnet group 107 are disposed on the inner side surface of the outer supports 8207. Corresponding to the spacing gap between adjacent two magnet units in the first magnet group 107, the outer supports 8207 are provided with a plurality of sound holes 82107, through which the sound emitted by the diaphragm can be propagated. In order to facilitate the connection of the outer supports 8207 and the sandwich support 8107 into an integrated body, the outer supports 8207 and the sandwich support 8107 are respectively provided with mounting holes 811, and the outer supports 8207 and the sandwich support 8107 can be connected to each other by bolts. In addition, the outer supports 8207 and the sandwich support 8107 can also be an integrated structure.

[0175] In the process of vibration, the diaphragm 307 needs to be always in the opposing gap, and after the vibration is completed, it can also be reset to the middle position of the opposing gap. In one embodiment provided in the present application, the speaker assembly further includes a suspension assembly 407, and the diaphragm 307 is connected to the housing 507 or the magnet unit (the first magnet unit 1107 and / or the second magnet unit 2107) through the suspension assembly 407, and the suspension assembly 407 is disposed at both ends or around the diaphragm 307. The suspension assembly 407 includes but is not limited to springs, elastic ropes, elastic supports, elastic strips, etc. In one embodiment, the suspension assembly 407 is an elastic rope, which is disposed at both ends of the diaphragm 307 along the length direction of the diaphragm 307, one end of the elastic rope is connected to the diaphragm 307, and the other end is connected to the housing 507 or the magnet unit, and the elastic force provided by the elastic rope can always suspend the diaphragm 307 in the middle position of the opposing gap, and after the diaphragm 307 vibrates to one side, the elastic force of the elastic rope can drive the diaphragm 307 to reset.

[0176] In another embodiment, referring to FIG. 14, the suspension assembly 407 is an elastic strip, which is disposed around the diaphragm 307, one side of the elastic strip is connected to the diaphragm 307, and the other side is connected to the cavity wall of the accommodating cavity of the housing 507. Using the elastic strip as the suspension assembly 407 can not only effectively suspend the diaphragm 307 in the middle position of the opposing gap, but also divide the accommodating cavity of the housing 507 into an inner cavity and an outer cavity.

[0177] Further, each diaphragm 307 on the loudspeaker assembly is provided with an independent suspension assembly 407.

[0178] The diaphragm 307 is composed of a multi-layer structure. In one embodiment, the diaphragm 307 is a three-layer structure, the middle layer is an EVA (Ethylene Vinyl Acetate Copolymer) layer, which has certain rigidity and toughness, and can effectively support the diaphragm 307. On both sides of the EVA layer are metal layers such as aluminum foil. Generally, glue can be brushed on both sides of the EVA layer, and then the aluminum foil layer is bonded to the surface of the EVA layer. The surface of the aluminum foil layer is formed with a circuit structure. When the circuit structure is powered, it can drive the entire diaphragm 307 to vibrate. The specific material of the middle layer of the diaphragm 307 is not limited in the present application. As long as the material of the middle layer has certain rigidity and toughness, it can meet the technical solution of the present application. For example, the material of the middle layer includes but is not limited to: plastic sheet, carbon fiber sheet, hardboard, polymer material plate, composite material plate, silica gel film, glass fiber glue, cloth-based double-sided adhesive tape, paper-based double-sided adhesive tape, etc.

[0179] Referring to FIGS. 15 and 16, in one embodiment of the present application, a loudspeaker device is also provided, which includes the sound body 1007 and the loudspeaker assembly described above. The sound body 1007 has a containing cavity, and the loudspeaker assembly is arranged in the containing cavity. The sound body 1007 is provided with sound transmission holes 707 on opposite side walls, respectively. The sound emitted by different diaphragms 307 can be transmitted out from the sound transmission holes 707 on different side walls. In order to reduce the sound emitted by the diaphragm 307 being blocked or reflected by the sound body 1007, the sound transmission holes 707 are arranged corresponding to the gap between the first magnet unit 1107 and the second magnet unit 2107 in the first magnet group 107. Specifically, the sound transmission holes 707 are arranged between the two spaced first magnet units 1107 and the second magnet units 2107, and the width of the sound transmission holes 707 is equal to the width of the gap. In this way, the area of the sound transmission holes 707 can be increased as much as possible, thereby improving the efficiency of the sound emitted by the diaphragm 307 being transmitted out.

[0180] Further, the shape of the loudspeaker assembly is approximately square, and the cross-sectional shape of the sound body 1007 includes but is not limited to: circular, square, oval, polygonal. The shape of the loudspeaker assembly is approximately square, and the loudspeaker assembly is fixedly arranged in the sound box body.

[0181] Referring to Fig. 17, in one embodiment provided in the present application, a speaker device is provided, which comprises at least one acoustic body 1007 with a cavity structure 5007 and the speaker assembly mentioned above. The speaker assembly is arranged in the acoustic body 1007, the outer supports 8207 on the speaker assembly are arranged in the openings on the acoustic body 1007 respectively, and the two outer supports 8207 are substantially flush with the outer surface of the acoustic body 1007 respectively. As mentioned above, in order to stably arrange the diaphragm 307 in the gap between the first magnet group 107 and the second magnet group 207, the diaphragm 307 is provided with a suspension assembly 407. As shown in Fig. 17, the suspension assembly 407 is a semicircular elastic strip, which is arranged at the edge of the diaphragm 307, one side of the elastic strip is connected with the edge of the diaphragm 307, and the other side is connected with the inner side surface of the outer support 8207. Similarly, the diaphragm 307 between the other set of first magnet group 107 and second magnet group 207 is also arranged in the same way. In this way, the cavity structure 5007 is isolated into a closed space, the back surfaces of the two diaphragms 307 respectively face the cavity structure 5007, and the front surfaces of the two diaphragms 307 respectively face the sound holes 82107 on the outer supports 8207.

[0182] When the speaker assembly vibrates to produce sound, the two diaphragms 307 vibrate simultaneously, for example, simultaneously vibrate inwardly or simultaneously vibrate outwardly. When the two diaphragms 307 vibrate, the sound emitted from the outer sides of the two diaphragms 307 can be respectively transmitted outwardly from the sound holes 82107 on the different outer supports 8207. The two sound waves not only do not cancel each other, but also superimpose each other due to the same phase. The sound waves emitted from the inner sides of the two diaphragms 307 are transmitted into the cavity structure 5007 through the gap between the first magnet group 107 and the second magnet group 207, and are absorbed by the acoustic body 1007. Of course, sound-absorbing materials can be placed in the cavity structure 5007, the sound waves entering the cavity structure 5007 are absorbed by the sound-absorbing materials, or as shown in Fig. 16, a complex structure capable of absorbing sound waves is arranged in the acoustic body 1007, so as to absorb the sound waves entering the inside of the cavity structure 5007.

[0183] In addition, since the vibration directions of the two diaphragms 307 are opposite, the kinetic energy of the vibration of the two diaphragms 307 can cancel each other, so that the acoustic body 1007 is in force balance and does not vibrate due to force.

[0184] Referring to Fig. 18, in another embodiment of the present application, a speaker device is also provided, which comprises two sound bodies 1007 with cavity structures 5007 and the speaker assembly mentioned above, the two sound bodies 1007 are respectively arranged on the two sides of the speaker assembly and connected to the outer supports 8207 on the two sides. The sound holes 82107 on the outer supports 8207 are in communication with the cavity structures 5007 of the sound bodies 1007. Similarly, one diaphragm 307 is arranged in the gap between the first magnet group 107 and the second magnet group 207 on the two sides, respectively, and the edge of the diaphragm 307 is connected with the suspension assembly 407 which is an elastic strip, and the other end of the suspension assembly 407 is connected with the inner surface of the outer support 8207, so that the cavity structure 5007 in communication with the sound hole 82107 is separated from the external space.

[0185] In combination with the embodiment of Fig. 17 mentioned above, the two diaphragms 307 will vibrate synchronously, i.e. vibrate outwardly at the same time or vibrate inwardly at the same time, and when the two diaphragms 307 vibrate, the sound waves emitted by the diaphragms can be propagated outwardly through the gap between the first magnet group 107 and the second magnet group 207. At this time, the sound emitted by the diaphragm 307 is propagated outwardly through the open gaps around the speaker assembly, and it can be considered that the speaker assembly is a line sound source, and the listening effect at different positions which are the same distance from the speaker assembly and at an angle with the plane of the speaker assembly is consistent in the axial direction perpendicular to the plane of the speaker assembly. Specifically, referring to Fig. 19, since the speaker device is surrounded by open gaps 3307, the sound emitted by the speaker device also has no obvious directivity in the horizontal direction. Fig. 19 only represents a schematic diagram, and the width of the open gap 3307 can be narrower. In the figure, the straight line distance from point O to points G, H and J is the same, although the angles of these position points with the plane of point O are different, but the listening effect obtained at points G, H and J is consistent.

[0186] Referring to Fig. 18, on the side where the diaphragm 307 is combined with the cavity structure 5007, the sound waves emitted by the diaphragm 307 can enter the cavity structure 5007 of the different sound bodies 1007, respectively, and in the cavity structure 5007, sound-absorbing materials or attracting structures can be arranged, and these sound waves are gradually consumed and absorbed in the cavity structure 5007. Similarly, since the vibration directions of the two diaphragms 307 are opposite, the kinetic energy of the two diaphragms 307 can be offset, and then the force acting on the sound body 1007 is balanced and no forced vibration occurs.

[0187] In summary, in the technical solution provided in the present application, by arranging the diaphragm in the two rows of oppositely arranged Halbach array magnet groups, not only can the magnetic field in the opposite gap be strengthened, but also the magnetic field outside the magnet group can be weakened, so that the metal such as iron is not easily adsorbed outside the magnet group, the safety of the device is effectively improved, and the sound quality of the speaker assembly is better.

[0188] The sound quality of the planar diaphragm loudspeaker is highly related to the magnetic field strength at the diaphragm. When the diaphragm is in a high magnetic field environment, the diaphragm can not only emit louder sound, but also the sound quality is better. In order to obtain higher magnetic field strength, referring to FIG. 20, two magnets are usually arranged in a same-pole opposite manner to form an opposite gap (region A) between the two magnets, and the magnetic field strength in the opposite gap will be significantly improved. Although this manner can meet the requirement of the diaphragm for high magnetic field strength, the magnetic field always exists on both sides (region B) of the magnet pair because each magnet usually has two poles. The magnetic field not only cannot be effectively used, but also will be short-circuited with the effective magnetic field in region A, thereby reducing the magnetic field strength in region A. In addition, the magnetic field in region B is also easy to attract metals of iron, cobalt, nickel and the like. Specifically, in the loudspeaker device, the opposite magnets are usually arranged in a shell having a receiving cavity. When the cabinet is small, the magnetic field in region B on both sides of the magnet pair will make the part of the space outside the cabinet also in the magnetic field range of region B. If at this time, the metals of iron, cobalt, nickel and the like are close to the shell, these materials will be easily attracted outside the shell. The strong magnetic attraction force not only is easy to damage the loudspeaker device, but also is easy to injure the user. If the cabinet volume is thus increased, it is not cost-effective.

[0189] In order to avoid the generation of excess strong magnetic field on the outside of the opposite magnet pair to solve the above problems, the application provides a loudspeaker assembly and a loudspeaker device.

[0190] FIG. 21 is a perspective view of a loudspeaker assembly provided by an embodiment of the application; and FIG. 22a is a perspective view of another loudspeaker assembly provided by an embodiment of the application. Referring to FIGS. 21 and 22a, in one embodiment of the application, a loudspeaker assembly is provided, which includes two groups of magnet groups 108 and at least one diaphragm 208. The two groups of magnet groups 108 are arranged opposite to each other with a spacing therebetween, and an opposite gap is formed between the two opposite groups of magnet groups 108. Specifically, the first magnet group 108 is arranged on a first plane, and the second magnet group 108 is arranged on a second plane. The first plane and the second plane are parallel and arranged with a spacing therebetween, thereby forming the opposite gap. The at least one diaphragm 208 is arranged in the opposite gap, and the diaphragm 208 is provided with a conductive circuit 708. The two opposite groups of magnet groups 108 can form a strong magnetic field in the opposite gap. After the conductive circuit 708 on the diaphragm 208 is powered, the conductive circuit 708 can be forced in the magnetic field, thereby driving the entire diaphragm 208 to vibrate and emit sound.

[0191] Further, each group of magnet groups 108 includes a plurality of first-type magnet units 1108 and a plurality of second-type magnet units 1208. The plurality of first-type magnet units 1108 and the plurality of second-type magnet units 1208 of each group of magnet groups 108 are arranged in a radial manner and a Halbach array manner.

[0192] The first type of magnet units 1108 in different magnet groups 108 are arranged in opposite poles, and the second type of magnet units 1208 in different magnet groups 108 have the same magnetic pole direction parallel to the surface of the diaphragm 208. Specifically, the first type of magnet units 1108 in the first magnet group and the first type of magnet units 1108 in the second magnet group are respectively located in different planes, the first type of magnet units 1108 in different magnet groups 108 are arranged in opposite poles, and the two second type of magnet units 1208 in different magnet groups 108 are arranged in opposite directions, but have the same magnetic field direction, and the internal magnetic field direction of all the second type of magnet units 1208 is parallel to the surface of the diaphragm 208.

[0193] Referring to FIG. 21, the plurality of magnet units (including the first type of magnet units 1108 and the second type of magnet units 1208) can be arranged radially along a circumferential direction (for example, in FIG. 21, the overall structure of the speaker assembly is approximately cylindrical), or can be arranged radially along an elliptical direction (that is, the overall structure of the speaker assembly is approximately an elliptical cylinder, and the cross section is elliptical). Each magnet unit includes N and S poles, and the first type of magnet units in different magnet groups 108 are arranged in opposite poles, which can be understood as: the opposite poles of the two first type of magnet units in different magnet groups 108 are the same, for example, the same poles N-N are arranged in opposite directions (magnets 111a and 111b in FIG. 21), or the same poles S-S are arranged in opposite directions (magnets 112a and 112b in FIG. 21).

[0194] In addition, since the magnet units in the two groups of magnet groups 108 are Halbach arrays, among the plurality of magnet units, the magnetic pole direction of the magnet unit (the internal magnetic field direction of the magnet, as shown by the arrow direction in FIG. 21) not only includes the direction perpendicular to the opposite gap (for example, magnets 111a, 111b, 112a, 112b, etc. in FIG. 21), but also includes the direction parallel to the opposite gap (for example, magnets 121a, 122a, etc. in FIG. 21). With respect to the design of the interval change of the magnetic pole direction, the magnetic field on the side of each magnet group 108 facing the diaphragm 208 will be enhanced, and the magnetic field on the side of each magnet group 108 facing away from the diaphragm 208 will be reduced. Therefore, in the technical solution provided in the embodiments of the present application, the arrangement of the plurality of magnet units in the magnet groups 108 arranged on both sides of the diaphragm 208 is a Halbach array, which not only strengthens the magnetic field in the opposite gap, but also weakens the magnetic field outside the magnet group 108, so that the metal such as iron is not easily attracted to the outside of the magnet group 108, effectively improving the safety of the device, and also making the sound quality of the sound emitting unit better.

[0195] Further, the same type of magnet units in the two groups of magnet groups 108 have the same size, and the sizes of different types of magnet units can be the same or different, and the plurality of magnet units are arranged radially in a ring-shaped region. Specifically, the length, width and height of different types of magnet units can be the same or different. Specifically, the length, width and height of the first type of magnet units 1108 and the second type of magnet units 1208 can be the same or different. For example, when the length, width and height of the first type of magnet units 1108 and the second type of magnet units 1208 are the same, it can be considered that the length, width and height of all magnet units are the same, and the structural sizes of all magnet units are the same. For another example, when the length, width and / or height of the first type of magnet units 1108 and the second type of magnet units 1208 are different, the length, width and / or height of the first type of magnet units 1108 and the second type of magnet units 1208 in each magnet group 108 are different, but the sizes of all first type of magnet units 1108 in the two opposite magnet groups 108 are the same, and the sizes of all second type of magnet units 1208 in the two opposite magnet groups 108 are the same.

[0196] Further, the plurality of magnet units are arranged in a circular arrangement in a planar region, and the included angles between different magnet units are the same. In the technical solution of the present application, the diaphragm 208 can be circular or annular. In a specific embodiment, referring to FIG. 22a, the diaphragm 208 is circular. The circular diaphragm 208 is arranged in the opposite gap, and the diameter of the diaphragm 208 can be the same as or different from the diameter of the magnet group 108 arrangement region, which can be set according to actual conditions. The center of the diaphragm 208 is on the same axis as the center of the annular arrangement of the magnet group 108.

[0197] Referring to FIG. 22a, since most of the diaphragm 208 is suspended in the opposite gap, in order to facilitate the fixation of the diaphragm 208, in an embodiment provided in the present application, the loudspeaker assembly further comprises an elastic suspension assembly 308, one end of the elastic suspension assembly 308 is connected to the diaphragm 208, and the other end is connected to the magnet unit. For example, the elastic suspension assembly 308 comprises a connecting structure 3108 and an elastic piece, the cylindrical connecting structure 3108 is connected to different magnet groups 108 respectively, the diaphragm 208 is connected to the outer wall of the connecting structure 3108, and an annular elastic strip is arranged between the diaphragm 208 and the connecting structure 3108.

[0198] Referring to Fig. 23, the loudspeaker assembly further comprises a resilient suspension assembly 308 and a housing 408, the resilient suspension assembly 308 comprises a resilient member, the magnet group 108 is connected to the housing 408, one end of the resilient suspension assembly 308 is connected to the diaphragm 208, and the other end is connected to the magnet unit or the housing 408. Generally, the magnet unit (including the first type of magnet unit 1108 and the second type of magnet unit 1208) is generally fixedly connected to the housing 408, and the diaphragm 208 is indirectly connected to the housing 408, so that the diaphragm 208 can be stably arranged in the opposing gap, and the diaphragm 208 can be reset to the middle position of the opposing gap in time after vibration. The resilient suspension assembly 308 includes but is not limited to springs, elastic ropes, elastic supports, elastic strips, etc.

[0199] Taking the elastic member as an elastic strip as an example, referring to Fig. 23, the elastic strip is in a ring structure, which is arranged at the periphery of the diaphragm 208, the inner ring edge of the elastic strip is arranged on the outer edge of the diaphragm 208, and the outer ring edge of the elastic strip is connected to the housing 408. When the diaphragm 208 vibrates, the elastic strip can be stretched to adapt to the vibration of the diaphragm 208. The elastic strip includes but is not limited to rubber strips, silica gel strips, etc.

[0200] In another embodiment, referring to Fig. 22b, a loudspeaker assembly comprises two housings 408, the two housings 408 are arranged opposite to each other, and a magnet group 108 is arranged on the annular area close to the edge of the housing 408. Each magnet group 108 comprises a plurality of first type of magnet units 1108 and a plurality of second type of magnet units 1208, and the magnet units are arranged in the same manner as in the above-mentioned embodiments. Corresponding to the arrangement position of the magnet units, a diaphragm 208 is arranged between the two groups of magnet units, the diaphragm 208 is in a ring shape, the inner ring edge and the outer ring edge of the ring-shaped diaphragm 208 are provided with a resilient suspension assembly 308, and the resilient suspension assembly 308 is connected to one of the housings 408. The resilient suspension assembly 308 can be an elastic strip, which can support the diaphragm 208 between the two groups of opposite magnet units. When the diaphragm 208 vibrates up and down, the elastic strip will be stretched or compressed, and the diaphragm 208 can realize vibration and sound emission. In order to facilitate the diaphragm to emit sound to the outside environment, one possible way is to further provide a plurality of sound transmission holes 1508 on the housing 408, and the sound transmission holes 1508 are arranged between the adjacent two magnet units. Another possible way is that the top surface of the housing 408 is not provided with a sound transmission hole 1508, and the sound is transmitted from the side surface of the sound emitting unit. Specifically, the ring-shaped diaphragm 208 emits sound through the narrow side gap, which is equivalent to a linear sound source constructed by the gap. At this time, the listening effect at different heights at the same position is consistent, and in addition, due to the ring design, the listening effect of the same distance rotating around the cylindrical surface of the sound is also consistent, so that an acoustic sound with no difference from all angles in space is generated.

[0201] It should be noted that the shell 408 in the loudspeaker assembly can also be considered as the device body 100 of the loudspeaker device, for example, as shown in FIG. 28. The structure in FIG. 23 is not limited to the loudspeaker assembly, but can also be a loudspeaker device.

[0202] Referring to FIGS. 22a and 23, in an embodiment provided in the present application, the loudspeaker assembly further comprises a magnetic conducting member 508, and each magnetic group 108 is provided with a magnetic conducting member 508, which is arranged on the side of the magnetic group 108 away from the diaphragm 208. The magnetic conducting member 508 is not connected to each magnetic unit, but is connected to the first type of magnetic unit 1108 in the magnetic group 108.

[0203] The effect of the magnetic conducting member 508 will be described in detail below. Generally, for a magnet, the magnetic field lines outside the magnet are from the N pole and then return to the S pole, which can be considered as a short circuit of the N pole and the S pole of the magnetic field lines of the magnet itself. In the technical solution of the present application, the diaphragm 208 is located between the two oppositely arranged magnetic groups 108, and the diaphragm 208 can effectively utilize the magnetic field in the opposed gap, but there is also a magnetic field distribution outside the magnetic group 108, and the magnetic field lines of the first type of magnetic unit 1108 in the magnetic group 108 are easily short-circuited from the N pole to the S pole. For example, referring to FIG. 22a, if there is no magnetic conducting member 508, part of the magnetic field lines of the magnet 112b in the first type of magnetic unit 1108 are easily short-circuited from the N pole to the S pole of the magnet 112b, which causes a short circuit of the N pole and the S pole of the magnetic field lines of the magnet itself, and thus the magnetic field in the opposed gap will be affected.

[0204] After the magnetic conducting member 508 is arranged, the magnetic field lines of the magnet 112b are returned to the S pole of the magnet 111b under the action of the magnetic conducting member 508 after being emitted from the N pole, so that the plurality of magnetic units can still form a complete magnetic field closed loop and will not affect the magnetic field in the opposed gap. Therefore, in the technical solution of the present application, a plurality of magnetic conducting arms 5108 on the magnetic conducting member 508 are connected to different first type of magnetic units 1108, and adjacent magnetic conducting arms 5108 (for example, the first magnetic conducting arm 5108a and the second magnetic conducting arm 5108b) are connected to different magnetic poles (for example, the N pole of the magnet 112b and the S pole of the magnet 111b) of the first type of magnetic unit 1108.

[0205] Referring to FIG. 22a, the magnetic conducting member 508 comprises a plurality of magnetic conducting arms 5108, and the plurality of magnetic conducting arms 5108 are connected at the center of the magnetic group 108 to form a circular portion 5208, which is arranged corresponding to the middle region of the diaphragm 208.

[0206] Referring to FIG. 21, FIG. 22a and FIG. 24, in one embodiment provided by the present application, the conductive circuit 708 comprises an inner ring circuit and an outer ring circuit, which are different circuits. The diaphragm 208 has a first circuit setting area and a second circuit setting area, the outer ring circuit is arranged in the first circuit setting area, and the inner ring circuit is arranged in the second circuit setting area.

[0207] When the annular area corresponding to the arrangement of the plurality of magnet units is projected on the diaphragm 208, the projection area can be considered as the first circuit setting area on the diaphragm 208, for example, the area A in FIG. 24 (the outer periphery of the circular dotted line in FIG. 24), which can be simply understood as the outer ring area of the diaphragm. The area B in FIG. 24 (the inner ring of the circular dotted line in FIG. 24) is the second circuit setting area within the ring of the diaphragm 208. Since the plurality of magnet units converge at the edge of the circular dotted line in FIG. 24, the ends of the magnet units will form a usable magnetic field in the inner ring circuit setting area, and the inner ring circuit on the diaphragm 208 can fully utilize this magnetic field to realize vibration sound. The inner ring circuit on the diaphragm 208 can fully utilize this magnetic field to realize vibration sound, which not only effectively improves the sound level, but also improves the sound quality of the diaphragm 208. The outer ring circuit and the inner ring circuit are different circuits, for example, the outer ring circuit is a general sound generating circuit element, and the inner ring circuit is a high-pitched circuit element.

[0208] Referring to FIG. 21, FIG. 22a, FIG. 24 and FIG. 25, in one embodiment provided by the present application, each group of magnet groups 108 comprises first type magnet units 1108 and second type magnet units 1208, the magnetic pole direction of the first type magnet units 1108 is perpendicular to the direction of the diaphragm 208 (for example, magnet units 111a, 111b, 112a, 112b, etc.), and the magnetic pole direction of the second type magnet units 1208 is parallel to the direction of the diaphragm 208 (for example, magnet units 121a, 122a, etc.). Based on the projection of the first type magnet units 1108 on the diaphragm 208, the conductive circuit 708 is arranged around the projection of each first type magnet unit 1108 in turn. Specifically, the outer ring circuit on the diaphragm 208 is arranged around the projection of each first type magnet unit 1108 in turn to form a disc-shaped circuit. The present application does not make specific limitations on the coiled manner of the conductive circuit 708, as long as it can be arranged around the projection of each first type magnet unit 1108 in turn and fully utilize the magnetic field formed by the first type magnet units 1108.

[0209] Referring to FIG. 21, FIG. 25 and FIG. 26, in an embodiment, the conductive circuit 708 is arranged on the front surface of the diaphragm 208, or the conductive circuit 708 is arranged on both the front surface and the back surface of the diaphragm 208. When the conductive circuit 708 is arranged on both the front surface and the back surface of the diaphragm 208, the conductive circuit 708 on the front surface and the conductive circuit 708 on the back surface are connected in parallel or in series. In a specific embodiment, the conductive circuit 708 on the front surface of the diaphragm 208 is connected in series with the conductive circuit 708 on the back surface of the diaphragm 208. In FIG. 25, point a can be considered as the starting point of the conductive circuit 708 on the front surface of the diaphragm 208, and point b can be considered as the ending point of the conductive circuit 708 on the front surface of the diaphragm 208. The conductive circuit 708 penetrates the diaphragm 208 from the center of the diaphragm 208, extends to the back surface of the diaphragm 208, and is connected with the conductive circuit 708 on the back surface of the diaphragm 208. In FIG. 26, point c can be considered as the starting point of the conductive circuit 708 on the back surface of the diaphragm 208, and point d can be considered as the ending point of the conductive circuit 708 on the back surface of the diaphragm 208. The conductive circuit 708 at point b penetrates the diaphragm 208 and is connected with the conductive circuit 708 at point c.

[0210] Further, the conductive circuit 708 includes at least one conductive line. When the conductive circuit 708 includes a plurality of conductive lines, the plurality of conductive lines are arranged at intervals, and the plurality of conductive lines have the same extension direction.

[0211] In order to facilitate the processing of the diaphragm 208 and to make the diaphragm 208 have a certain strength, in an embodiment, the diaphragm 208 includes an intermediate layer and a metal film. The metal film is arranged on the intermediate layer, and the conductive circuit 708 is formed on the metal film. Specifically, when the diaphragm 208 has the conductive circuit 708 on one surface, the intermediate layer also has the metal film on one surface. When the diaphragm 208 has the conductive circuit 708 on both the front surface and the back surface, the intermediate layer also has the metal film on both the front surface and the back surface. The metal film can be an aluminum foil or other conductive material. The conductive circuit 708 is insulated from other areas on the metal film. The conductive circuit 708 on the metal film can be processed by etching, laser engraving, etc.

[0212] In one embodiment, the diaphragm 208 is a multi-layer structure. For example, the diaphragm 208 is a three-layer structure, and the middle layer is an EVA (Ethylene Vinyl Acetate Copolymer) layer, which has certain rigidity and toughness and can effectively support the diaphragm 208. On both sides of the EVA layer, there are metal layers such as aluminum foil. Generally, glue can be brushed on both sides of the EVA layer, and then the aluminum foil layer is bonded to the surface of the EVA layer. The surface of the aluminum foil layer has a circuit structure. When the circuit structure is powered, it can drive the entire diaphragm 208 to vibrate. The specific material of the middle layer of the diaphragm 208 is not limited in the present application. For example, the material of the middle layer includes but is not limited to plastic sheet, thin wood board, carbon fiber sheet, hardboard, metal sheet, polymer material plate, composite material plate, and glass fiber double-sided tape.

[0213] As mentioned above, the diaphragm 208 has a first circuit arrangement area and a second circuit arrangement area. The first circuit arrangement area corresponds to the area where the magnet unit is located (for example, area A in FIG. 24), and the second circuit arrangement area is the middle area surrounded by the first circuit arrangement area (for example, area B in FIG. 24). This is the case when the diaphragm 208 is a complete structure. Of course, corresponding to the first circuit arrangement area and the second circuit arrangement area, the diaphragm 208 can also be composed of multiple different diaphragms. Specifically, in one embodiment provided by the present application, when the conductive circuit 708 on the diaphragm 208 includes an inner ring circuit and an outer ring circuit, the diaphragm 208 can be divided into two diaphragms, i.e., a diaphragm corresponding to the first circuit arrangement area is an outer ring diaphragm, and a diaphragm corresponding to the second circuit arrangement area is an inner ring diaphragm. The two diaphragms are independent of each other. When the speaker assembly vibrates to produce sound, the inner ring diaphragm and the outer ring diaphragm work together to achieve complete sound production of the speaker assembly. The inner ring circuit is arranged on the inner ring diaphragm, and the outer ring circuit is arranged on the outer ring diaphragm. The two diaphragms have different hardness or different materials. Since the inner ring circuit arrangement area and the outer ring circuit arrangement area are used to produce sounds of different frequency bands, for example, the inner ring circuit arrangement area is usually used for high-pitched sound production, and the outer ring circuit arrangement area is used for ordinary audio sound production. Therefore, the inner ring diaphragm of the diaphragm 208, which is provided with the inner ring circuit, is usually relatively thinner.

[0214] Referring to FIG. 28, in one embodiment of the present application, a speaker device is also provided, which includes a device body 10008 and the speaker assembly described above. The device body 10008 has a receiving cavity, and the speaker assembly is arranged in the receiving cavity. The speaker assembly can be fixedly arranged in the receiving cavity or detachably arranged in the receiving cavity. In order to adapt to various use occasions, the cross-sectional shape of the sound body includes but is not limited to a circular shape, a square shape, an elliptical shape, a polygonal shape, etc.

[0215] In summary, the technical solution provided in this application embodiment allows the diaphragm to vibrate and generate sound by placing it within two opposing magnet groups. Since the magnet groups are Helbeck array magnet groups, not only is the magnetic field in the gap between the opposing magnets strengthened, but the magnetic field outside the magnet groups is also weakened. This makes it less likely for metals such as iron to be attracted to the outside of the magnet groups, effectively improving the safety of the device and resulting in better sound quality from the sound-producing unit.

[0216] The diaphragm has two opposing sides. Low-frequency sound waves emitted by the diaphragm are more likely to diffract at the edge of the diaphragm. Sound waves on one side will diffract to the other side. The phase difference between the sound waves on the two sides is 180 degrees. Therefore, when the sound waves on the two opposing sides meet, a cancellation phenomenon will occur. High frequencies are more directional, and high-frequency sound waves are less likely to diffract. Therefore, most planar diaphragm loudspeakers can produce good high-frequency sound quality, but poor low-frequency sound quality.

[0217] In light of this, the inventors considered blocking the diffraction of bass frequencies at the edge of the diaphragm, reducing the mutual cancellation of bass frequencies on opposite sides of the diaphragm, thereby increasing the bass effect of the sound-producing device. However, this requires a physical entity to block the transmission of bass sound waves at the edge where the bass diffracts along the diaphragm, and the length of the entity cannot be too short, otherwise it will not effectively block the propagation of bass sound waves. It can be understood that the height of the entity must be equal to or greater than the height of the diaphragm. Therefore, this solution has certain limitations in many space-constrained scenarios. A larger area of ​​the entity blocking bass diffraction results in a larger volume of the diaphragm suspension structure, thus leading to a larger sound-producing device, making it inconvenient to use.

[0218] Based on this, the inventors of this utility model designed the solutions of the various embodiments provided in this application, setting one side of the diaphragm along its length as a fixed side and the other side as a free side. The fixed side supports the entire diaphragm, and the side of the fixed side away from the free side has a solid structure capable of blocking sound waves. The bass emitted from the fixed side is blocked by the solid structure and cannot diffract, thereby avoiding some bass sound wave cancellation and enhancing the bass effect. In addition, the fixed side can be set on a wall or any solid structure of a certain length, thereby utilizing the structure at the installation position to further reduce the volume of the diaphragm suspension structure. This allows the diaphragm suspension structure to both compensate for bass and provide stable support for the diaphragm.

[0219] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present application, not the entire structure.

[0220] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0221] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0222] In the description of the present embodiment, the terms "up", "down", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0223] Embodiment one:

[0224] Before describing the diaphragm suspension structure 109 of the present application in detail, the sound generating principle of the diaphragm 1009 will be briefly introduced, so that the reader can better understand the scheme of the present application.

[0225] The magnets have S poles (south poles) and N poles (north poles), and the two magnets are arranged with the same poles facing each other. As shown in FIG. 29, the magnetic lines of force are affected by the opposite poles of the magnets and are directed away from the opposite poles, so that the magnetic field direction at the opposite gap between the two magnets arranged with the same poles facing each other gradually tends to be perpendicular to the outgoing direction, i.e., parallel to the opposite pole surface. As shown in FIG. 30, a plurality of pairs of magnets arranged with the same poles facing each other are arranged at intervals, and the poles of the two adjacent pairs of magnets are opposite to each other, so that a stable and relatively strong magnetic field is generated at the opposite gap between the two adjacent pairs of magnets arranged with the same poles facing each other. The diaphragm 1009 is arranged at the opposite gap, and the diaphragm 1009 has a conductive circuit 1309. When a current passes through the conductive circuit 1309, the conductive circuit 1309 is affected by the magnetic field and vibrates, thereby driving the diaphragm 1009 to vibrate and produce sound.

[0226] It can be understood that sound has high-frequency sound waves and low-frequency sound waves, wherein the high-frequency sound waves have short wavelengths and strong directivity and weak diffraction ability, and the low-frequency sound waves have long wavelengths and are easy to diffract. Since the phase difference between the sound waves on the front and back sides is 180 degrees, the diffracted sound waves on the front and back sides of the diaphragm meet at the edge of the diaphragm and are mutually offset. Therefore, if the two long sides of the diaphragm 1009 are supported by light suspension wires or thin lines, the edges of the diaphragm 1009 are in an open state, and the low-frequency sound waves are inevitably offset, which leads to poor bass quality of the sound.

[0227] The diaphragm suspension structure 109 of the present embodiment can avoid the low-frequency sound wave offset on one side of the diaphragm without affecting the vibration and sound production of the diaphragm, thereby improving the bass quality of the sound and solving the above problems.

[0228] Specifically, as shown in FIG. 31, the diaphragm suspension structure 109 provided by the embodiment includes a diaphragm 1009, a fixing assembly 2009, and a plurality of magnet groups 3009 (not shown in the figure) located on the fixing assembly 2009, the magnet groups 3009 include two homopolar opposite magnets 3109 to generate a stable magnetic field in the opposite gap, and the conductive circuit 1309 on the diaphragm 1009 is located in the magnetic field, when current passes through, the conductive circuit is forced to drive the diaphragm to vibrate and make sound. In the direction of the short side of the diaphragm 1009, the diaphragm 1009 has opposite free side edges 1209 and fixed side edges 1109, the fixed side edges 1109 can be directly arranged on the entity, or can be arranged on the fixing assembly 2009, no matter whether the fixed side edges 1109 are directly arranged on the entity or arranged on the fixing assembly 2009, there should be no gap between the fixed side edges 1109 and the entity to prevent low-frequency sound waves from diffraction. When the fixed side edges 1109 are arranged on the fixing assembly 2009, there are two cases, the first case is that the entire edge of the fixed side edges 1109 is fixedly arranged on the fixing assembly 2009, the fixing assembly 2009 is abutted with the entity, the fixed side edges 1109 are fixedly arranged with the fixing assembly 2009, there is no relative displacement between the fixed side edges 1109 and the fixing assembly 2009, so as to ensure that there is no gap between the fixed side edges 1109 and the entity. The second case is that the fixed side edges 1109 are soft-fixed with the fixing assembly 2009, there can be relative displacement, but when the fixed side edges 1109 relatively displace with respect to the fixing assembly 2009, the edge of the fixed side edges 1109 always keeps abutting with the fixing assembly 2009, which ensures that the low-frequency sound waves will not be diffracted around the edge of the fixed side edges 1109 on the premise of not hindering the diaphragm from vibrating and making sound.

[0229] The application range of the diaphragm suspension structure 109 of the embodiments of the present application includes but is not limited to desktop sound, sound of home theater, sound of large meeting room, both sides of screen, etc. In order to ensure a good hearing system, the diaphragm suspension structure 109 can be arranged on both sides of the entity. When applied to desktop sound, the entity can be a part related to the power amplifier circuit. The diaphragm suspension structure can be produced together with the desktop sound, and is directly arranged on both sides of the entity before leaving the factory. When applied to home theater, the diaphragm suspension structure 109 can be arranged on both sides of the suspended television screen, or on the wall on both sides of the projection screen. Here, the wall on both sides of the projection screen is the wall perpendicular to the wall on which the projection screen is located. At this time, the diaphragm 1009 is parallel to the wall on which the projection screen is located. During the viewing process, the user can enjoy more natural sound without box resonance, and the viewing experience is improved. When applied to a large meeting room, the diaphragm suspension structure 109 can be arranged on the walls on both sides of the display screen at the front, or on the walls on both sides perpendicular to the display screen. When applied to a screen, the diaphragm suspension structure 109 is arranged on both sides of the screen. The screen can be located in a meditation room, a tea room, a chess room, etc. At this time, some soothing light music can be played to relax the mood. Meanwhile, the user has a more private space when playing chess, drinking tea or discussing business in front of the screen. The diaphragm suspension structure 109 can also be arranged on both sides of the frame of a display picture. When the user is located in front of the display picture to view, the user is located in the best listening area, and can hear the explanation information of the display picture. The diaphragm suspension structure 109 can also be arranged on the walls on both sides of a protruding wall. The front of the wall can be provided with display elements. And so on. As long as the diaphragm suspension structure 109 can be installed, and the gap between the edge of the diaphragm 1009 and the entity is ensured, it is applicable.

[0230] In some specific embodiments of the present application, the structure of the diaphragm suspension structure 109 is shown in Figs. 32a and 32b. How to fix the diaphragm when the entity is a screen or a television, etc. is described in detail.

[0231] The fixing assembly 2009 includes a plurality of stacked fixing frames 2109. The fixing frame 2109 has opposite two sides. One side is a fixing side 22109, and the other side is a diaphragm mounting side 22209. A clamping groove is formed on the fixing side 22109. The side edge of the entity is accommodated in the clamping groove. A plurality of through threaded holes are formed on the two groove side walls of the clamping groove. A wing-shaped bolt is screwed into the threaded hole and abuts against the front surface of the side edge of the entity through the threaded hole, so as to fix the fixing assembly 2009 on the side edge of the entity. The limiting head of the wing-shaped bolt is provided with a handle which can be rotated by the operator, so as to facilitate the operator to operate the installation and disassembly of the fixing frame.

[0232] In some embodiments of the present application, as shown in FIG. 32a, a plurality of fixing frames 2109 are stacked in sequence along the height direction to form a fixing assembly. In other embodiments, as shown in FIG. 32b, the fixing frame 2109 has two, one on each side of the diaphragm 1009. As long as the diaphragm and the opposing magnets can be supported, the present embodiment is not specifically limited.

[0233] The diaphragm mounting side 22209 is provided with a diaphragm mounting groove 22309, and the two side walls of the diaphragm mounting groove 22309 are provided with magnet mounting grooves that open towards each other. The two magnets 3109 of the same polarity are arranged in the corresponding magnet mounting grooves. A stable magnetic field is generated in a part of the diaphragm mounting groove 22309, so that the conductive circuit 1309 on the diaphragm 1009 is located in the magnetic field. The fixing assembly 2009 further comprises a diaphragm clamp 2209 arranged on the inner side wall of the diaphragm mounting groove 22309 close to the fixed side. The edge of the fixed side edge 1109 of the diaphragm 1009 can be directly clamped on the diaphragm clamp 2209 and abut against the inner side surface of the diaphragm clamp 2209, thereby avoiding the diffraction of low-frequency sound waves. Alternatively, the clamp body of the diaphragm clamp 2209 is provided with soft buffer abutting members 2309, and the fixed side edge 1109 is clamped between the two abutting members 2309. This not only ensures the stable support of the diaphragm 1009, but also ensures that the diaphragm 1009 will not produce undesirable sound due to hard contact with the diaphragm clamp 2209, and further ensures that the diaphragm clamp 2209 can be attached to the diaphragm without gaps. The abutting members 2309 can have a certain adhesion, so that the diaphragm 1009 further cannot be separated from the abutting members 2309. The abutting members 2309 can be made of sponge, glue or eva composite material, so as to reduce the noise generated by the hard contact between the diaphragm 1009 and the diaphragm clamp 2209. The free side edge 1209 of the diaphragm 1009 can be suspended or suspended with a light elastic / viscoelastic rope to provide certain constraint and restoring force. The gap between the groove wall of the clamping groove and the side edge of the entity and the gap between the diaphragm clamp 2209 and the inner side wall of the diaphragm mounting groove 22309 can be provided with interlayer glue, which can not only prevent the generation of gaps, but also play a buffering role against vibration impact.

[0234] When the entity 2 is a wall, as shown in FIG. 32a, the fixing assembly 2009 includes a plurality of fixed frames 2109 stacked in the height direction, and at least one pair of magnet installation slots are arranged on the fixed frame 2109 to accommodate the opposite magnets 3109. The opposite magnets 3109 generate a stable magnetic field at the opposite gap, and the conductive circuit 1309 on the diaphragm 1009 is located at the opposite gap. In some embodiments of the present application, the fixing assembly 2009 further includes a diaphragm clamp 2209 located between two fixed frames 2109, which is attached between the fixed frame 2109 and the wall, and the fixed frame 2109 is abutted and fixed to the wall. The fixed method can be fixed by screws or embedded in the wall, and the present embodiment is not limited in particular, as long as the fixed frame 2109 can be fixed to the wall. The fixed side edge 1109 is clamped on the diaphragm clamp 2209 and abuts the inner side of the diaphragm clamp 2209. Further, in some embodiments of the present application, the diaphragm clamp 2209 is provided with an abutting piece 2309 having a certain buffering effect, and the fixed side edge 1109 is clamped between two abutting pieces 2309, which not only ensures the stable support of the diaphragm 1009, but also ensures that the diaphragm 1009 will not produce bad sound by hard contact with the diaphragm clamp 2209, and further ensures that the diaphragm clamp 2209 can be attached to the diaphragm without gap. The abutting piece 2309 can have a certain viscosity, so that the diaphragm 1009 will not be separated from the abutting piece 2309. The abutting piece 2309 can be made of sponge, glue or eva composite material. The fixed frame 2109 and the wall are provided with interlayer glue or soft composite material to prevent hard contact, which not only ensures that there is no gap between the fixed frame 2109 and the wall, but also plays a buffering role to prevent vibration impact between the fixed frame 2109 and the wall.

[0235] In some embodiments of the present application, another implementable structure of the diaphragm suspension structure 109 includes a diaphragm 1009 and a fixing assembly 2009 for providing support to the diaphragm 1009. The diaphragm 1009 is provided with a conductive circuit 1309 on both sides along the long direction. The fixing assembly 2009 is located in the center of the two conductive circuits 1309. When the current passes through the conductive circuit 1309 on both sides, the two side edges of the diaphragm 1009 vibrate and sound at the same time, which is used as left and right channels. When the sound signals of the left and right channels are consistent, the vibrations are the same, that is, the sound waves generated by the left and right sides are of the same phase and can be superimposed on each other without cancellation, so the bass effect is good. When the sound signals of the left and right channels are inconsistent, the diaphragm on the left side is equivalent to increasing the distance of diffraction for the sound wave of the right side, which also reduces the diffraction of low frequency. In this case, it is suitable for small sound equipment such as desktop sound.

[0236] In order to meet the support needs of the small sound equipment, in some embodiments of the present application, the fixed assembly 2009 can be implemented in various structures, as shown in Figures 33-34, one of which is that the fixed assembly 2009 includes a support rod 2409, a base 2509 at the bottom end of the support rod 2409 abutting the mounting surface, and a fixed frame 2109 stacked in height direction on both sides of the support rod 2409, the fixed frame 2109 is provided with a magnet mounting slot opposite the opening, and two magnets 3109 with the same polarity are arranged in the corresponding magnet mounting slot to enable the conductive circuit 1309 to be in a stable magnetic field. The base 2509 can provide stable support for the support rod 2409, so that the support rod 2409 can be stably positioned on the mounting surface, thereby enabling the support rod 2409 to support the fixed frame 2109.

[0237] The diaphragm 1009 is made of a hard material, which can meet the overall support when suspended on one side.

[0238] It can be understood that, in order to prevent affecting the stability of the magnetic field, the entity and the fixed assembly are made of non-magnetic materials.

[0239] Embodiment two:

[0240] The present embodiment provides a sound-producing device, as shown in Figures 30-32b, which includes a central display and the diaphragm suspension structure 109 provided in embodiment one, wherein the length direction of the central display is the left-right direction, and the central display is provided with the diaphragm suspension structure 109 on at least one side of the left-right direction, which can be only one side with the diaphragm suspension structure 109 or both sides with the diaphragm suspension structure 109. The central display can be a screen, when one side of the screen has the diaphragm suspension structure 109, due to the screen having a certain length in the left-right direction, it can block the low frequency cancellation on one side when the single-sided diaphragm 1009 produces sound, when the screen has the diaphragm suspension structure 109 on both sides, the two-sided diaphragm 1009 vibrates to produce sound, respectively undertaking the audio task of two sound channels, and the two-sided diaphragm does not have the problem of low frequency cancellation near the middle side, and since the sound equipment does not have a closed box, it can have a good listening experience in both the front and back directions perpendicular to the diaphragm. The screen can be applied to tea rooms, meditation rooms or high-end restaurants and other public places. The central display can also be a display picture, the display picture is provided with the diaphragm suspension structure 109 on both sides in the left-right direction, so that the display picture is a sound-producing display picture, and the sound produced can be an explanation of the display picture. The central display can also be a screen, the diaphragm suspension structure 109 is located on the wall on both sides of the screen and is perpendicular to the wall. The screen can be a movie screen, an enterprise promotion screen, a conference screen, etc., and the screen can be an electronic screen or a cloth projection screen. The central display in the present embodiment is not limited in particular.

[0241] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some of the technical features can be replaced by equivalent features. Such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A diaphragm, characterized by, The application relates to a diaphragm for a loudspeaker, which comprises: an intermediate layer for providing support force for the diaphragm; a metal film attached to the surface of the intermediate layer and covering the front and back surfaces of the intermediate layer; wherein the metal film is provided with a circuit structure, the circuit structure is bent at the edge of the intermediate layer and extends from the front surface of the intermediate layer to the back surface of the intermediate layer without interruption.

2. The diaphragm of claim 1, wherein The circuit structure extends from the front surface of the intermediate layer to the back surface of the intermediate layer after the metal film is bent at the first side of the intermediate layer.

3. The diaphragm of claim 2, wherein, The circuit structure at the head end of the metal film is connected to the circuit structure at the tail end of the metal film through welding.

4. The diaphragm of claim 1, wherein The metal film is a closed structure, and the circuit structure extends from the front surface of the intermediate layer to the back surface of the intermediate layer after the metal film is bent at the first side and the second side of the intermediate layer.

5. The diaphragm of claim 1, wherein Along the width direction of the metal film, multiple circuit structures are arranged in U-shaped structures and connected in series on the metal film. The circuit structure on the front surface of the intermediate layer and the circuit structure on the back surface of the intermediate layer have the same projection on the plane of the intermediate layer or are arranged in a staggered manner.

6. The diaphragm of claim 5, wherein The circuit structure comprises multiple parallel conductive lines.

7. The diaphragm of any one of claims 1 to 6, wherein, The diaphragm further comprises a force rib structure connected to the diaphragm. The force rib structure comprises horizontal force ribs and / or vertical force ribs.

8. The diaphragm of claim 7, wherein, The force rib structure is arranged on the intermediate layer or is attached to the front surface or the back surface of the diaphragm.

9. The diaphragm of claim 1, wherein The diaphragm further comprises an elastic suspension assembly arranged at the edge of the diaphragm. Alternatively, the elastic suspension assembly is connected to the intermediate layer.

10. The diaphragm of claim 9, wherein, The elastic suspension assembly is an elastic strip arranged on the two sides or the four sides of the diaphragm, one side of the elastic strip is connected to the intermediate layer, and the other side extends outward.

Images