Plane diaphragm loudspeaker

Abstract

The embodiment of the utility model discloses a planar diaphragm loudspeaker, which comprises a shell assembly, a magnet assembly, a diaphragm assembly, a voice coil and a protective cover, the shell assembly is provided with a containing area, and one side of the containing area is open and forms an opening. The magnet assembly is arranged in the accommodating area; the vibrating diaphragm assembly is arranged in the containing area, the vibrating diaphragm assembly comprises a diaphragm and a supporting piece, and the two opposite sides of the supporting piece make contact with the magnet assembly and the diaphragm respectively in the axial direction of the opening; the voice coil is arranged on one side, facing the magnet assembly, of the diaphragm, and the supporting piece is wound on the periphery of the voice coil; the protective cover is arranged on one side, away from the magnet assembly, of the diaphragm, a groove is formed in one side, facing the diaphragm, of the protective cover, and the orthographic projection of the voice coil is located in the range of the orthographic projection of the groove along the axial projection of the opening. According to the planar diaphragm loudspeaker provided by the embodiment of the invention, the fluctuation range of the sensitivity is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of loudspeakers, and in particular to a planar diaphragm loudspeaker. BACKGROUND

[0002] The sensitivity of the planar diaphragm loudspeaker is directly affected by the distance from the voice coil to the magnet assembly. In the related art, a plastic step is arranged on the shell assembly of the planar diaphragm loudspeaker, the diaphragm assembly is spaced apart from the magnet assembly through the plastic step, and the voice coil is arranged on the diaphragm assembly. Therefore, the height of the plastic step determines the distance between the voice coil and the magnet assembly. However, the plastic step is prone to burrs and burrs during the manufacturing process, so that the height tolerance of the plastic step is large, and thus the fluctuation range of the sensitivity of the planar diaphragm loudspeaker is also large, which affects the consistency of the planar diaphragm loudspeaker curve. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the embodiments of the present application expect to provide a planar diaphragm loudspeaker, which aims to help reduce the fluctuation range of the sensitivity.

[0004] To solve the above problems, the technical scheme of the embodiments of the present application is as follows:

[0005] The embodiments of the present application provide a planar diaphragm loudspeaker, which comprises:

[0006] A shell assembly is provided with a containing area, one side of the containing area is open and forms an opening;

[0007] A magnet assembly is arranged in the containing area;

[0008] A diaphragm assembly is arranged in the containing area, the diaphragm assembly comprises a diaphragm and a support, and the opposite sides of the support are in contact with the magnet assembly and the diaphragm along the axial direction of the opening;

[0009] A voice coil is arranged on one side of the diaphragm facing the magnet assembly, and the support is arranged around the outer periphery of the voice coil;

[0010] A cover is arranged on the side of the diaphragm away from the magnet assembly, and a groove is arranged on the side of the cover facing the diaphragm, and the orthographic projection of the voice coil is located within the orthographic projection of the groove along the axial direction of the opening.

[0011] In some embodiments, the size of the support along the axial direction of the opening is 0.15mm-0.2mm; and / or,

[0012] The support is annular.

[0013] In some embodiments, the magnet assembly is provided with a notch, the inner wall of the accommodating area is provided with a protrusion, at least part of the protrusion is arranged in the notch, and in the axial direction of the opening, the protrusion and the support are arranged in a spaced manner and form a spacing area.

[0014] The planar diaphragm loudspeaker further comprises a pad and a lead wire, the pad is arranged on the side wall of the shell assembly, and the lead wire is arranged in the spacing area and is electrically connected to the pad and the voice coil at two ends, respectively.

[0015] In some embodiments, in the axial direction of the opening, the size of the spacing area is 0.05mm-0.1mm.

[0016] In some embodiments, the pad comprises a welding part and a connecting part, the welding part is arranged on the side wall of the shell assembly and is electrically connected to the lead wire, and the connecting part is arranged on the welding part and is used for electrical connection with an external element; wherein, in the axial direction of the opening, the thickness size of the welding part is greater than the thickness size of the connecting part.

[0017] In some embodiments, the side of the protective cover facing the diaphragm is recessed to form the groove.

[0018] In some embodiments, the magnet assembly comprises a magnetic ring and an inner magnet, the magnetic ring is arranged around the outer periphery of the inner magnet, and the wall body away from the opening of the accommodating area is in abutment with the inner magnet.

[0019] In some embodiments, the shell assembly comprises a support and a substrate, the support forms a mounting channel, one end of the mounting channel is the opening, the substrate is arranged at the other end of the mounting channel and surrounds the inner wall of the mounting channel to form the accommodating area, and the inner magnet is in abutment with the substrate.

[0020] In some embodiments, the substrate is provided with a clamping jaw, and the clamping jaw is embedded in the support.

[0021] In some embodiments, the support is an injection molding part, the substrate is a metal part, and the substrate and the support are integrally injection molded.

[0022] The planar diaphragm loudspeaker of the embodiments of the present application supports the diaphragm through the support, the distance between the voice coil and the magnet assembly is controlled by the size of the support, the support can be produced separately without being injection molded together with part of the shell assembly, therefore, the size tolerance of the support can be controlled within a small range, thereby facilitating the reduction of the fluctuation range of the distance between the voice coil and the magnet assembly, i.e., facilitating the reduction of the fluctuation range of the sensitivity of the planar diaphragm loudspeaker; meanwhile, the protective cover is provided with the groove to meet the vibration space of the voice coil in the direction away from the magnet assembly, therefore, the planar diaphragm loudspeaker can stably and reliably emit sound. Attached Figure Description

[0023] Figure 1 This is an axial view of a planar diaphragm horn according to an embodiment of this application;

[0024] Figure 2 for Figure 1 The diagram shows a cross-sectional view of a planar diaphragm horn.

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 for Figure 1 The exploded view of the planar diaphragm speaker is shown below;

[0027] Figure 5 This is an axial view of a bracket according to an embodiment of this application;

[0028] Figure 6 This is an axial view of a pad according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures

[0030] 100. Planar diaphragm speaker; 100a. Spacer area; 10. Housing assembly; 10a. Receiving area; 11. Support; 11a. Opening; 11b. Protrusion; 12. Substrate; 12a. Claw; 20. Magnet assembly; 21. Magnet ring; 21a. Notch; 22. Inner magnet; 30. Diaphragm assembly; 31. Diaphragm; 32. Support; 40. Voice coil; 50. Cover; 50a. Groove; 60. Solder pad; 61. Solder part; 62. Connecting part. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore only examples, and should not be used to limit the scope of protection of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0033] Reference to an "embodiment" in this document means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As those skilled in the art will readily appreciate, the various embodiments described in this document can be combined with one another in various ways.

[0034] In the description of the embodiments of the present application, the term "and / or" is merely used to describe an associated relationship between associated objects, and indicates that three relationships can exist, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this document generally indicates that the front and rear associated objects are in an "or" relationship.

[0035] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical term "contact" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0037] The application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] The embodiments of the present application provide a planar diaphragm loudspeaker.

[0039] Please refer to Figures 1 to 4 , the planar diaphragm loudspeaker 100 includes a shell assembly 10, a magnet assembly 20, a diaphragm assembly 30, a voice coil 40 and a cover 50.

[0040] The shell assembly 10 provides a mounting base for other components of the planar diaphragm loudspeaker 100. The shell assembly 10 is provided with a receiving area 10a, one side of which is open and forms an opening 11a, and the components such as the magnet assembly 20, the diaphragm assembly 30, the voice coil 40 and the cover 50 can be mounted in the receiving area 10a through the opening 11a.

[0041] The magnet assembly 20 and the diaphragm assembly 30 are arranged in the accommodating area 10a, the diaphragm assembly 30 comprises a diaphragm 31 and a support 32, the opposite sides of the support 32 are in contact with the magnet assembly 20 and the diaphragm 31 respectively along the axial direction of the opening 11a, and the voice coil 40 is arranged on the side of the diaphragm 31 facing the magnet assembly 20.

[0042] The magnet assembly 20 generates a magnetic field, and the voice coil 40 is arranged in the magnetic field. When audio current passes through the voice coil 40, the current is affected by the magnetic field, so that the voice coil 40 vibrates, and in turn drives the diaphragm 31 to vibrate and emit sound.

[0043] It can be understood that, since the voice coil 40 is arranged on the side of the diaphragm 31 facing the magnet assembly 20, the distance between the voice coil 40 and the magnet assembly 20 is controlled by the size of the support 32 in the axial direction of the opening 11a.

[0044] Here, the distance between the voice coil 40 and the magnet assembly 20 is controlled by the size of the support 32, so that the shell assembly 10 does not need to be provided with a step on the side wall of the accommodating area 10a to support the diaphragm 31, and the support 32 can be produced separately without being injection molded together with part of the shell assembly 10. Therefore, the size tolerance of the support 32 can be controlled within a smaller range, thereby facilitating the reduction of the fluctuation range of the distance between the voice coil 40 and the magnet assembly 20, i.e., the fluctuation range of the sensitivity of the planar diaphragm loudspeaker 100.

[0045] The material of the support 32 is not limited. For example, it can be a metal material such as steel or copper. The metal material support 32 is easier to control the size tolerance during production (for example, the size tolerance of the copper support 32 can be controlled to 0.01mm), so that the consistency of the size of the support 32 is higher; and the metal material support 32 does not have burr or burr phenomenon on the surface. In this way, it is further beneficial to reduce the fluctuation range of the distance between the voice coil 40 and the magnet assembly 20, thereby further reducing the fluctuation range of the sensitivity of the planar diaphragm loudspeaker 100 and reducing the THD value of the planar diaphragm loudspeaker 100.

[0046] The support 32 is arranged around the outer periphery of the voice coil 40. That is, the support 32 does not intrude into the gap between the voice coil 40 and the magnet assembly 20, and the voice coil 40 does not touch the support 32 when it vibrates and generates displacement in the direction of approaching the magnet assembly 20.

[0047] The cover 50 is arranged on the side of the diaphragm 31 away from the magnet assembly 20, the side of the cover 50 facing the diaphragm 31 is provided with a groove 50a, and the orthographic projection of the voice coil 40 is located within the orthographic projection range of the groove 50a along the axial direction of the opening 11a.

[0048] In this way, when the voice coil 40 vibrates and drives the diaphragm 31 to displace away from the magnet assembly 20, the space in the groove 50a can accommodate the diaphragm 31 and the voice coil 40, so that the diaphragm 31 and the voice coil 40 will not hit the cover 50.

[0049] It should be noted that the sensitivity of the planar diaphragm loudspeaker 100 is directly affected by the distance between the voice coil 40 and the magnet assembly 20.

[0050] In the related art, the housing assembly of the planar diaphragm loudspeaker is provided with a plastic step, the diaphragm assembly is spaced apart from the magnet assembly through the plastic step, and the voice coil is arranged on the diaphragm assembly. Therefore, the height of the plastic step determines the distance between the voice coil and the magnet assembly. However, the plastic step is generally integrally injection molded with part of the structure of the housing assembly during the manufacturing process, and burrs and burrs are prone to occur on the surface of the plastic step, so that the height tolerance of the plastic step is large, and the fluctuation range of the sensitivity of the planar diaphragm loudspeaker is also large, which affects the consistency of the curve of the planar diaphragm loudspeaker.

[0051] The planar diaphragm loudspeaker of the embodiment of the present application supports the diaphragm 31 through the support 32, the distance between the voice coil 40 and the magnet assembly 20 is controlled through the size of the support 32, the support 32 can be produced separately and does not need to be injection molded with part of the structure of the housing assembly 10, therefore, the size tolerance of the support 32 can be controlled within a small range, so as to facilitate reducing the fluctuation range of the distance between the voice coil 40 and the magnet assembly 20, that is, facilitating reducing the fluctuation range of the sensitivity of the planar diaphragm loudspeaker 100; at the same time, the cover 50 is provided with the groove 50a to meet the vibration space of the voice coil 40 away from the magnet assembly 20, therefore, the planar diaphragm loudspeaker 100 can stably and reliably emit sound.

[0052] In some embodiments, please refer to Figure 2 and Figure 3 In the axial direction of the opening 11a, the size of the support 32 is 0.15mm-0.2mm.

[0053] Exemplarily, the size of the support 32 is as shown in D1 in Figure 3 , for example, it can be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, etc.

[0054] It should be noted that the size of the support 32 is the distance between the diaphragm 31 and the magnet assembly 20.

[0055] In the embodiment, the distance between the diaphragm 31 and the magnet assembly 20 is not less than 0.15 mm, which is beneficial to reduce the probability that the voice coil 40 touches the magnet assembly 20 when the voice coil 40 vibrates and generates displacement to the magnet assembly 20; meanwhile, the distance between the diaphragm 31 and the magnet assembly 20 is not greater than 0.2 mm, thus, it is beneficial to design the thickness of the planar diaphragm loudspeaker 100 to be smaller, i.e., beneficial to the miniaturization design of the planar diaphragm loudspeaker 100.

[0056] It should be noted that in the embodiments of the present application, the thickness direction of the planar diaphragm loudspeaker 100, the voice coil 40, the support 32, the diaphragm 31, the substrate 12, the cover 50 and the like can be regarded as the direction parallel to the axial direction of the opening 11a.

[0057] In some embodiments, referring to Figure 2 and Figure 3 , the support 32 is annular. It should be noted that the annular here should not limit the shape of the support 32 to a circular ring, in fact, the shape of the support 32 is not specifically limited in the present application, and the projection of the outer contour of the support 32 can be circular, rectangular, square or rounded rectangular, etc.

[0058] Specifically, the support 32 can be a steel ring, a copper ring, etc.

[0059] In the embodiment, the support 32 is arranged around the voice coil 40 for one turn, thus, the diaphragm 31 is supported by the support 32 at any angle in the circumferential direction, thus, it is beneficial to improve the reliability and stability of the support 32 for supporting the diaphragm 31.

[0060] The specific manner of arranging the groove 50a on the cover 50 is not limited.

[0061] In some embodiments, referring to Figure 2 and Figure 3 , the side of the cover 50 facing the diaphragm 31 is recessed to form the groove 50a.

[0062] Specifically, referring to Figure 1 and Figure 2 , i.e., on the side of the cover 50 away from the diaphragm 31, the outer periphery of the cover 50 is provided with a sink edge, thus, the cover 50 is more resistant to pressure and less likely to deform, which is beneficial to improve the curve defect and other problems of the planar diaphragm loudspeaker 100 caused by the deformation of the cover 50. In addition, by adjusting the width of the sink edge, it is more convenient to glue here to improve the sealing effect between the cover 50 and the side wall of the accommodating area 10a.

[0063] Here, the cover 50 is taken as a stainless steel cover as an example, the stainless steel plate is formed by stamping to form the stainless steel cover, and the side of the stainless steel cover that is stamped forms the groove 50a.

[0064] In the embodiment, the protective cover 50 is substantially of equal wall thickness.

[0065] In other embodiments, the side of the protective cover 50 facing away from the diaphragm 31 can also be planar. That is, the wall thickness of the protective cover 50 is greater at the outer edge region and smaller at the groove 50a.

[0066] In some embodiments, referring to Figure 2 and Figure 3 the magnet assembly 20 includes a magnetic ring 21 and an inner magnet 22, the magnetic ring 21 is annularly arranged at the outer periphery of the inner magnet 22, and the wall of the accommodation area 10a away from the opening 11a is in abutment with the inner magnet 22.

[0067] In the related art, when the magnet assembly is assembled, the inner magnet is not supported below, and it is not easy to complete the flat installation. In addition, when glue is applied between the outer peripheral wall of the inner magnet and the inner peripheral wall of the magnetic ring, some glue may not be applied well, thereby directly affecting the consistency of the curve of the planar diaphragm loudspeaker at low frequencies.

[0068] In the embodiment, the wall of the accommodation area 10a can support the inner magnet 22, thereby facilitating the more flat installation of the inner magnet 22, facilitating the glue application between the inner magnet 22 and the magnetic ring 21, reducing the possibility of air leakage between the inner magnet 22 and the magnetic ring 21, and thereby facilitating the improvement of the performance of the planar diaphragm loudspeaker 100.

[0069] In addition, even if the glue application between the inner magnet 22 and the magnetic ring 21 is not uniform, since the wall of the accommodation area 10a can better shield the gap between the magnetic ring 21 and the inner magnet 22, thereby facilitating the improvement of the poor product appearance problem caused by the uneven glue application.

[0070] In some embodiments, referring to Figure 2 and Figure 3 the shell assembly 10 includes a bracket 11 and a substrate 12, the bracket 11 is annularly arranged to form a mounting channel, one end of the mounting channel is an opening 11a, and the substrate 12 is arranged at the other end of the mounting channel and annularly arranged with the inner wall of the mounting channel to form an accommodation area 10a, and the inner magnet 22 is in abutment with the substrate 12.

[0071] The material of the substrate 12 is not limited. For example, it can be a metal material such as stainless steel, copper, SPCC, etc.

[0072] The bracket 11 can be injection molded, for example. In this way, it is beneficial to reduce the production cost of the shell assembly 10.

[0073] In the embodiment, the bracket 11 and the substrate 12 are two components, thereby facilitating the reduction of the production difficulty of the shell assembly 10.

[0074] In some embodiments, referring to Figures 2 to 4 The substrate 12 is provided with a clamping jaw 12a which is embedded in the support 11.

[0075] Exemplarily, the substrate 12 can be provided with two clamping jaws 12a.

[0076] In this way, the substrate 12 is clamped in the support 11 through the clamping jaw 12a, which is conducive to improving the reliability and stability of the connection between the support 11 and the substrate 12.

[0077] In some embodiments, referring to Figures 2 to 4 The support 11 is an injection molding part, and the substrate 12 is a metal part. The substrate 12 and the support 11 are integrally injection molded.

[0078] Specifically, when the support 11 is produced, the substrate 12 can be embedded in an injection mold in advance. The injection material wraps the clamping jaw 12a, and the injection material is cooled and formed into the support 11, so that the clamping jaw 12a is conveniently embedded in the support 11.

[0079] In this embodiment, the assembly between the support 11 and the substrate 12 is facilitated, which is conducive to improving the production efficiency of the planar diaphragm loudspeaker 100.

[0080] In other embodiments, the support 11 and the substrate 12 can be formed respectively. The support 11 can be provided with a clamping portion, and the clamping jaw 12a is clamped to the clamping portion. In this way, the assembly between the support 11 and the substrate 12 can also be conveniently realized.

[0081] In some embodiments, referring to Figures 2 to 5 The outer periphery of the magnet assembly 20 is provided with a notch 21a. The inner wall of the accommodating area 10a is provided with a protrusion 11b. At least part of the protrusion 11b is arranged in the notch 21a. In the axial direction of the opening 11a, the protrusion 11b and the support 32 are arranged in a spaced manner and form a spacing area 100a. The planar diaphragm loudspeaker 100 further comprises a solder pad 60 and a lead wire. The solder pad 60 is arranged on the side wall of the shell assembly 10. The lead wire is arranged in the spacing area 100a and is electrically connected to the solder pad 60 and the voice coil 40 at both ends.

[0082] Specifically, the outer edge of the magnetic ring 21 is provided with a notch 21a.

[0083] It can be understood that since the voice coil 40 and the support 32 are arranged on the side of the diaphragm 31 facing the magnet assembly 20, that is, the voice coil 40 is located on the inner side of the support 32, and the solder pad 60 is located on the inner side of the support 32, after one end of the lead wire is electrically connected to the solder pad 60, the lead wire needs to enter the inner side of the support 31 from the outer side of the support 32 to realize electrical connection with the voice coil 40. Since the thickness direction of the support 32 is in contact with the magnet assembly 20 and the diaphragm 31 respectively, it is difficult for the lead wire to pass through.

[0084] In the embodiment, the gap 21a is provided, and the support 32 and the magnet assembly 20 are not in contact at the gap 21a, so that the lead wire can bypass the support 32 and be electrically connected to the voice coil 40 inside the support 32 and the solder pad 60 outside the support 32, respectively.

[0085] In addition, the gap 21a needs to be sealed in the axial direction of the gap 21a. That is, the air flow on the side of the magnet assembly 20 facing the diaphragm 31 needs to be prevented from flowing to the side away from the diaphragm 31 through the gap 21a.

[0086] In the embodiment, the protrusion 11b is provided. On the one hand, the protrusion 11b can effectively fill the space in the gap 21a, and then glue is applied between the outer wall of the protrusion 11b and the inner wall of the gap 21a, so that the gap 21a is sealed in the axial direction of the gap 21a. In this way, the sealing effect is good and the operation is convenient. On the other hand, the protrusion 11b can provide a certain supporting effect for the lead wire, thereby facilitating the reliability and stability of the electrical connection between the solder pad 60 and the voice coil 40.

[0087] In some embodiments, please refer to Figure 2 and Figure 3 In the axial direction of the gap 21a, the size of the spacing area 100a is 0.05mm-0.1mm.

[0088] For example, the size of the spacing area 100a is shown as D2 in Figure 3 , for example, can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, etc.

[0089] The size of the spacing area 100a is the distance between the side of the protrusion 11b facing the diaphragm 31 and the side of the magnet assembly 20 facing the diaphragm 31 in the axial direction of the gap 21a.

[0090] In the embodiment, the size range of the spacing area 100a is reasonable. On the one hand, the size of the spacing area 100a is not less than 0.05mm, so that the lead wire can be reliably arranged in the spacing area 100a. On the other hand, the size of the spacing area 100a is also not greater than 0.1mm, so that the filling effect of the protrusion 11b on the gap 21a is better, which is conducive to reducing the probability of air leakage at the gap 21a.

[0091] In some embodiments, please refer to Figure 1 , Figure 4 and Figure 6The welding pad 60 comprises a welding portion 61 and a connecting portion 62. The welding portion 61 is arranged on the side wall of the housing assembly 10 and is electrically connected with the lead wire. The connecting portion 62 is arranged on the welding portion 61 and is used for electrically connecting with external elements. In the axial direction of the opening 11a, the thickness dimension of the welding portion 61 is greater than that of the connecting portion 62.

[0092] For example, the thickness dimension of the welding portion 61 is shown as D3 in Figure 6 the thickness dimension of the connecting portion 62 is shown as D4 in Figure 6 .

[0093] It should be noted that the thickness dimension of the welding portion 61 and the thickness dimension of the connecting portion 62 respectively refer to the dimensions of the two in the axial direction of the opening 11a.

[0094] The forming manner of the welding pad 60 is not limited.

[0095] For example, the welding pad 60 is divided into a longer segment and a shorter segment. The shorter segment is bent and attached to the longer segment. Thus, a part of the longer segment is covered by the shorter segment and forms the welding portion 61 together with the shorter segment. The uncovered area of the longer segment is the connecting portion 62.

[0096] In the embodiment, the welding portion 61 can be embedded in the support 11, and the connecting portion 62 is exposed outside the support 11 and is used for electrically connecting with external elements. Since the size of the connecting portion 62 is relatively small, the height of the connecting portion 62 can be reduced.

[0097] The welding pad 60 can be integrally injection molded with the support 11.

[0098] Specifically, when the support 11 is produced, the welding pad 60 can be embedded in an injection mold in advance. The injection material wraps the welding pad 60, and the injection material is cooled and formed into the support 11. Thus, the welding pad 60 can be stably arranged on the support 11, and the production efficiency of the planar diaphragm loudspeaker 100 can be improved.

[0099] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features. The modification or replacement does not change the essence of the corresponding technical solutions, and should be covered in the scope of the claims and the specification of the present application. In particular, each technical feature mentioned in the embodiments can be combined in any manner without structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A planar diaphragm loudspeaker, characterized by, The application relates to a planar diaphragm loudspeaker, comprising: a housing assembly provided with a containing area, one side of the containing area being open and forming an opening; a magnet assembly arranged in the containing area; a diaphragm assembly arranged in the containing area, the diaphragm assembly comprising a diaphragm and a support, the opposite sides of the support being in contact with the magnet assembly and the diaphragm along the axial direction of the opening; a voice coil arranged on the side of the diaphragm facing the magnet assembly, the support being arranged around the outer periphery of the voice coil; a cover arranged on the side of the diaphragm away from the magnet assembly, the side of the cover facing the diaphragm being provided with a groove, and the orthographic projection of the voice coil being located in the range of the orthographic projection of the groove along the axial direction of the opening.

2. The planar diaphragm loudspeaker of claim 1, wherein, In the axial direction of the opening, the size of the support is 0.15mm-0.2mm; and / or, the support is annular.

3. The planar diaphragm loudspeaker of claim 1, wherein, The outer periphery of the magnet assembly is provided with a notch, the inner wall of the containing area is provided with a protrusion, at least part of the protrusion is arranged in the notch, and the protrusion and the support are arranged in a spaced manner and form a spacing area along the axial direction of the opening; the planar diaphragm loudspeaker further comprises a solder pad and a lead wire, the solder pad is arranged on the side wall of the housing assembly, and the lead wire is arranged in the spacing area and is electrically connected to the solder pad and the voice coil at both ends.

4. The planar diaphragm loudspeaker of claim 3, wherein, In the axial direction of the opening, the size of the spacing area is 0.05mm-0.1mm.

5. The planar diaphragm loudspeaker of claim 3, wherein, The solder pad comprises a solder part and a connecting part, the solder part is arranged on the side wall of the housing assembly and is electrically connected to the lead wire, and the connecting part is arranged on the solder part and is used for electrically connecting to external elements; wherein, in the axial direction of the opening, the thickness size of the solder part is greater than that of the connecting part.

6. The planar diaphragm loudspeaker of claim 1, wherein, The side of the cover facing the diaphragm is recessed to form the groove.

7. The planar diaphragm loudspeaker of any of claims 1-6, wherein, The magnet assembly comprises a magnetic ring and an inner magnet, the magnetic ring is annularly arranged on the outer periphery of the inner magnet, and the wall body away from the opening of the containing area is in abutment with the inner magnet.

8. The planar diaphragm loudspeaker of claim 7, wherein, The housing assembly comprises a support and a substrate, the support is annularly arranged to form a mounting channel, one end of the mounting channel is the opening, the substrate is arranged at the other end of the mounting channel and is annularly arranged with the inner wall of the mounting channel to form the containing area, and the inner magnet is in abutment with the substrate.

9. The planar diaphragm loudspeaker of claim 8, wherein, The substrate is provided with a clamping jaw, and the clamping jaw is embedded in the support.

10. The planar diaphragm loudspeaker of claim 8, wherein, The support is an injection molding part, the substrate is a metal part, and the substrate and the support are integrally injection molded.

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