Voice coil structure and manufacturing method thereof, sound generating device and electronic equipment

Abstract

The present invention discloses a voice coil structure and a manufacturing method thereof, a sound-generating device and an electronic device. The voice coil structure comprises a voice coil body, a conductive member and two leads. The voice coil body is a cylindrical structure with two ends open. A cavity is provided in the voice coil body. The voice coil body is also provided with two connecting holes connected to the cavity. The conductive member is provided in the cavity. Each lead is provided at one of the connecting holes and connected to the conductive member. The present invention aims to provide a voice coil structure that effectively reduces turbulence and eddy current. The voice coil structure is applied to a sound-generating device to effectively avoid the adverse effects of eddy current and turbulence, thereby reducing the distortion of the sound-generating device and improving the acoustic performance of the sound-generating device.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic conversion, and in particular to a voice coil structure and a manufacturing method thereof, as well as a sound-generating device and electronic equipment using the voice coil structure. Background Art

[0002] In the related art, the voice coil of the sound-emitting device usually uses enameled wire as a solid conductor wound on the voice coil structure frame. The enameled wire is easily damaged and there is a risk of coil breakage and short circuit when working at high temperature. At the same time, the cross-section of the enameled wire is circular. When the enameled wire is wound on the voice coil structure frame, a triangular groove exists between the upper and lower adjacent wires. When the voice coil is used in the sound-emitting device, turbulence, eddy currents and other adverse factors will be generated during the reciprocating vibration of the voice coil, resulting in increased distortion of the sound-emitting device, thereby affecting the acoustic performance of the sound-emitting device. Summary of the invention

[0003] The main purpose of the present invention is to provide a voice coil structure and a manufacturing method thereof, a sound-emitting device and an electronic device, aiming to provide a voice coil structure that effectively reduces turbulence and eddy currents. The voice coil structure is applied to the sound-emitting device, which can effectively avoid the adverse effects of eddy currents and turbulence, thereby reducing the distortion of the sound-emitting device and improving the acoustic performance of the sound-emitting device.

[0004] To achieve the above object, the present invention provides a voice coil structure, which is applied to a sound generating device, and comprises:

[0005] A voice coil body, wherein the voice coil body is a cylindrical structure with two ends open, a cavity is provided in the voice coil body, and two communication holes are provided in the voice coil body to communicate with the cavity;

[0006] a conductive member disposed in the cavity; and

[0007] Two lead wires, each of which is arranged at one of the connecting holes and connected to the conductive member.

[0008] In one embodiment, the conductive member is a solid conductive member, and the solid conductive member is filled in the cavity.

[0009] In one embodiment, the material of the solid conductive member is tin, copper, aluminum, tungsten, silver, gold, iron, nickel, lead, magnesium, zinc, molybdenum, yttrium, tungsten, or cobalt;

[0010] And / or, the solid conductive member is melted and injected into the cavity from the connecting hole, and is cooled to form the solid conductive member.

[0011] In one embodiment, the conductive member is a liquid conductive member, and the liquid conductive member is injected into the cavity from the connecting hole and fills the cavity.

[0012] In one embodiment, the cavity is arranged in a spiral shape in the voice coil body in a direction from one end of the voice coil body to the other end of the voice coil body.

[0013] In one embodiment, the cavities are arranged at intervals in a direction from an inner side of the voice coil body to an outer side of the voice coil body.

[0014] In one embodiment, on the axial cross section of the voice coil body;

[0015] A minimum spacing between two adjacent cavities along a direction from one end of the voice coil body to the other end of the voice coil body is greater than or equal to 0.05 mm; and / or a minimum spacing between two adjacent cavities along a direction from an inner side of the voice coil body to an outer side of the voice coil body is greater than or equal to 0.05 mm.

[0016] In one embodiment, on the axial cross section of the voice coil body, the shape of the cavity is circular, elliptical, triangular, square, trapezoidal or wedge-shaped;

[0017] And / or, the diameter of the cavity is greater than or equal to 0.1 mm;

[0018] And / or, a plurality of the cavities are provided in the voice coil body, and the plurality of the cavities are arranged at intervals along a direction from an inner side of the voice coil body to an outer side of the voice coil body; and each of the cavities is arranged in a spiral shape in the voice coil body along a direction from one end of the voice coil body to the other end of the voice coil body.

[0019] In one embodiment, the lead includes a cable and a conductive column, the conductive column is preset at the connecting hole, the conductive column electrically connects the conductive member and the cable, and the conductive column is a high temperature resistant conductive sheet.

[0020] In one embodiment, the voice coil structure further includes a glue layer, the glue layer covers the connecting hole, the lead wire passes through the glue layer, and is connected to the conductive member.

[0021] In one embodiment, the adhesive layer is elastic;

[0022] And / or, the adhesive layer is made of epoxy resin or silicone.

[0023] In one embodiment, the voice coil body comprises:

[0024] A skeleton, the skeleton being a cylindrical structure with openings at both ends; and

[0025] The shell is a cylindrical structure with openings at both ends, the shell is connected to the inner side of the frame and / or the outer side of the frame, and the cavity is arranged in the shell.

[0026] In one embodiment, along the axial direction of the voice coil body, the extension length of the housing is less than or equal to the extension length of the frame;

[0027] And / or, the shell is made of ceramic material or glass material;

[0028] And / or, the skeleton is made of ceramic material or glass material;

[0029] And / or, along the axial direction of the voice coil body, at least one end of the housing is provided with a chamfer, and the radius of the chamfer is in the range of 0.15 mm to 0.25 mm.

[0030] The present invention further provides a method for manufacturing the voice coil structure described above, the method comprising the steps of:

[0031] Manufacturing a voice coil body, so that the voice coil body is a cylindrical structure with two ends open, and a cavity and two communication holes communicating with the cavity are provided in the voice coil body;

[0032] Melting the conductive substrate, injecting the liquid conductive substrate into the cavity from the communicating hole by means of an injection device, and cooling to form a conductive member;

[0033] Two lead wires are respectively arranged at the two communicating ports, so that the lead wires are connected to the conductive member.

[0034] In one embodiment, the step of manufacturing the voice coil body so that the voice coil body is a cylindrical structure with two ends open, and a cavity and two connecting holes connecting the cavity are provided in the voice coil body comprises:

[0035] Winding the metal tin wire into a spiral shape on a coil winding machine, with spacing between adjacent layers of the metal tin wire to form a pre-shaped conductor;

[0036] Providing a mold, the mold having a cavity and an injection port connected to the cavity, fixing the pre-shaped wire in the cavity of the mold, injecting a base material into the cavity of the mold through the injection port, maintaining the mold temperature to shape the base material and evenly wrap the pre-shaped wire, and removing the mold to form a base shell and expose the two communication ports of the pre-shaped wire;

[0037] Drying and densifying the base shell under high temperature environment to liquefy the pre-shaped wire;

[0038] Pressurizing one of the communication ports causes the compressed air to discharge the liquefied pre-shaped wire inside the basic shell from another communication port to form a cavity, thereby obtaining the voice coil body.

[0039] In one embodiment, the spacing between the metal tin wires in adjacent layers is greater than or equal to 0.05 mm;

[0040] And / or, the diameter of the metal tin wire is equivalent to the diameter of the conductive member;

[0041] And / or, at least one end of the voice coil body is provided with a chamfer, and the radius of the chamfer is in the range of 0.15 mm to 0.25 mm;

[0042] And / or, the drying temperature is 60°C to 80°C, and the ambient temperature of the high temperature environment is 1300°C to 1400°C.

[0043] In one embodiment, the step of respectively arranging two lead wires at the two communication ports to connect the lead wires to the conductive member comprises:

[0044] Pre-buried high temperature resistant conductive pillars at the connecting openings, so that the conductive pillars are connected to the conductive members;

[0045] Sealing the communication port with high temperature resistant epoxy glue to form a glue layer;

[0046] The cable is welded to the conductive post at the communication port to form the lead, so that the cable is electrically connected to the conductive member through the conductive post.

[0047] The present invention also proposes a sound-generating device, which includes a vibration system and a magnetic circuit system, wherein the magnetic circuit system is provided with a magnetic gap, and the vibration system includes a diaphragm and a voice coil structure as described above, wherein one end of the voice coil structure is connected to the diaphragm, and the other end of the voice coil structure is suspended in the magnetic gap.

[0048] The present invention further provides an electronic device, comprising a device housing and the above-mentioned sound-generating device, wherein the sound-generating device is arranged in the device housing.

[0049] The voice coil structure of the technical solution of the present invention is applied to a sound-generating device. By setting a cavity in the voice coil body of the voice coil structure and setting the conductive member in the cavity, the formation of a triangular groove outside the voice coil body is effectively avoided. At the same time, a connecting hole connecting the cavity is set on the voice coil body, so that a lead wire is set at the connecting hole and connected to the conductive member, so that the external current is introduced into the conductive member in the cavity by using the lead wire. When such a voice coil structure is applied to a sound-generating device, turbulence and eddy current can be effectively avoided during the reciprocating vibration of the voice coil structure, thereby effectively reducing the distortion of the sound-generating device and improving the acoustic performance of the sound-generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0051] Figure 1 A schematic diagram of a voice coil structure according to an embodiment of the present invention;

[0052] Figure 2 It is an exploded schematic diagram of a voice coil structure in one embodiment of the present invention;

[0053] Figure 3 A cross-sectional schematic diagram of a voice coil structure in one embodiment of the present invention;

[0054] Figure 4 is a cross-sectional schematic diagram of a voice coil body in one embodiment of the present invention;

[0055] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0056] Figure 6 is a schematic diagram of an axial cross-section of a voice coil body in one embodiment of the present invention;

[0057] Figure 7 FIG. 4 is a cross-sectional schematic diagram of a sound-generating device in one embodiment of the present invention.

[0058] Description of Figure Numbers:

[0059] Label name Label name 100 Voice coil structure 31 Cables 1 Voice coil body 32 Conductive column 11 skeleton 4 Adhesive layer 12 case 500 Vibration system 121 Cavity 510 Diaphragm 122 Connecting hole 600 Magnetic circuit system 123 Chamfer 610 Magnetic gap 2 Conductive parts 700 Basin rack 3 lead 800 Sound device

[0060] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0063] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0064] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0065] In the related art, during the production of voice coils in sound-generating devices, enameled wires are usually used as solid conductors, and the enameled wires are wound on the voice coil structure frame in a clockwise or counterclockwise direction to form a voice coil structure. However, enameled wires are easily damaged, and there are risks such as coil breakage and short circuit when working at high temperatures; at the same time, the enameled wire has a circular cross-section, and when the enameled wires are wound on the voice coil structure frame, triangular grooves are formed on the voice coil structure frame between the upper and lower adjacent wires. When such a voice coil is used in a sound-generating device, during the reciprocating vibration of the voice coil, adverse factors such as turbulence and eddy currents will be generated, resulting in increased distortion of the sound-generating device, thereby affecting the acoustic performance of the sound-generating device.

[0066] Based on the above concepts and problems, the present invention proposes a voice coil structure 100, which is applied to a sound device 800. It can be understood that the sound device 800 can be a speaker structure, and the sound device 800 can be applied to electronic devices, such as headphones, speakers, televisions, computers, etc., which are not limited here.

[0067] Please refer to Figures 1 to 6 As shown, in the embodiment of the present invention, the voice coil structure 100 includes a voice coil body 1, a conductive member 2 and two lead wires 3, wherein the voice coil body 1 is a cylindrical structure with two ends open, a cavity 121 is provided in the voice coil body 1, and two connecting holes 122 connecting the cavity 121 are provided in the voice coil body 1, the conductive member 2 is provided in the cavity 121, and each lead wire 3 is provided at a connecting hole 122 and connected to the conductive member 2.

[0068] In the present embodiment, the voice coil body 1 is the main frame structure constituting the voice coil structure 100. By setting the voice coil body 1 as a cylindrical structure with openings at both ends, on the one hand, it is convenient to connect the voice coil structure 100 with the diaphragm 510 of the sound-generating device 800, thereby improving the connection stability; on the other hand, the voice coil body 1 is applied to the sound-generating device 800, so that it is convenient to be suspended in the magnetic gap 610 of the magnetic circuit system 600, so that the voice coil structure 100 can be more in contact with the magnetic field generated by the magnetic circuit system 600, thereby increasing the driving force of the voice coil structure 100.

[0069] It is understandable that the voice coil body 1 can be a circular cylindrical structure or an elliptical cylindrical structure, and of course it can also be a square cylindrical structure, which is not limited here. In this embodiment, by setting a cavity 121 in the voice coil body 1, that is, the cavity 121 is a closed cavity structure. The cavity 121 can be arranged along the circumference of the voice coil body 1. Optionally, the cavity 121 is arranged in a spiral shape in the voice coil body 1 from one end of the voice coil body 1 to the other end of the voice coil body 1, that is, the cavity 121 is arranged in a spiral shape along the circumference of the voice coil body 1. In this way, when the conductive member 2 is arranged in the cavity 121, the conductive member 2 extends along the spiral cavity 121, that is, the conductive member 2 fills the interior of the voice coil body 1, thereby avoiding the formation of a triangular groove structure on the outer wall of the voice coil body 1.

[0070] In this embodiment, two connecting holes 122 connecting the cavity 121 are provided on the voice coil body 1, so that one end of the lead wire 3 can pass through the connecting hole 122 to connect with the conductive member 2 in the cavity 121, thereby facilitating the lead wire 3 to introduce external current into the conductive member 2.

[0071] It can be understood that the spiral cavity 121 is arranged as a continuous cavity, the cavity 121 has two ends, and the two connecting holes 122 respectively connect the two ends of the cavity 121, so that the two leads 3 are connected to the two ends of the conductive member 2. Optionally, the lead 3 is a metal lead or a conductive lead, which is not limited here.

[0072] The voice coil structure 100 of the present invention is applied to a sound-generating device 800. By setting a cavity 121 in the voice coil body 1 of the voice coil structure 100 and setting the conductive member 2 in the cavity 121, the formation of a triangular groove outside the voice coil body 1 is effectively avoided. At the same time, a connecting hole 122 connecting the cavity 121 is set on the voice coil body 1, so that the lead 3 is set at the connecting hole 122 and connected to the conductive member 2, so that the external current is introduced into the conductive member 2 in the cavity 121 by using the lead 3. When the voice coil structure 100 is applied to the sound-generating device 800, the voice coil structure 100 can effectively avoid the generation of turbulence and eddy current during the reciprocating vibration process, thereby effectively reducing the distortion of the sound-generating device 800 and improving the acoustic performance of the sound-generating device 800.

[0073] In one embodiment, the conductive member 2 is a solid conductive member, and the solid conductive member is filled in the cavity 121. It can be understood that the conductive member 2 is a solid conductive member, that is, the conductive member 2 is a solid structure at room temperature. The solid conductive member is a continuous conductive member 2, and the solid conductive member is filled in the cavity 121, that is, the outer wall of the solid conductive member abuts against the inner wall of the cavity 121.

[0074] Optionally, the solid conductive member is made of metal materials such as tin, copper, aluminum, tungsten, silver, gold, iron, nickel, lead, magnesium, zinc, molybdenum, yttrium, tungsten, and cobalt. It is understandable that the solid conductive member is a structure such as a metal wire or metal line made of metal materials such as tin, copper, aluminum, tungsten, silver, gold, iron, nickel, lead, magnesium, zinc, molybdenum, yttrium, tungsten, and cobalt.

[0075] It can be understood that the solid conductive member can be injection molded with the voice coil body 1. Of course, in other embodiments, the solid conductive member is melted and injected into the cavity 121 from the connecting hole 122, and then the solid conductive member is formed after cooling. That is, the solid conductive member is first melted into a liquid state, and then the liquid is injected into the cavity 121 through the connecting hole 122 to fill the cavity 121, and then the solid conductive member is formed after cooling, so that the solid conductive member in the cavity 121 becomes a continuous integral structure, which is not limited here.

[0076] In one embodiment, the conductive member 2 is a liquid conductive member, which is injected into the cavity 121 from the connecting hole 122 and fills the cavity 121. It can be understood that the liquid conductive member is in a liquid state at room temperature or high temperature, and the liquid conductive member can be injected into the cavity 121 through the connecting hole 122 and fill or fill the cavity 121.

[0077] In one embodiment, the cavities 121 are arranged at intervals in a direction from the inner side of the voice coil body 1 to the outer side of the voice coil body 1 .

[0078] In this embodiment, if Figures 3 to 6 As shown, the cavity 121 is arranged in a spiral shape from the upper end to the lower end of the voice coil body 1, that is, the conductive parts 2 in the cavity 121 are arranged in an upper and lower interval along the axial direction of the voice coil body 1, and on the axial section of the voice coil body 1, the conductive parts 2 are arranged linearly along the upper and lower directions.

[0079] It can be understood that in the radial direction of the voice coil body 1, the cavities 121 can also be arranged in a left-right interval arrangement, that is, in the direction from the inner side of the voice coil body 1 to the outer side of the voice coil body 1, the conductive members 2 in the cavities 121 are arranged in a left-right interval arrangement along the radial direction of the voice coil body 1, and on the axial section of the voice coil body 1, the conductive members 2 are linearly arranged along the left-right direction.

[0080] In this embodiment, the cavities arranged at intervals in the left and right directions are connected in sequence, that is, the cavity 121 is spirally arranged from the upper end to the lower end, and then spirally arranged from the lower end to the upper end, that is, the spiral cavity located on the outside surrounds the spiral cavity located on the inside, and the inner spiral cavity is connected to the outer spiral cavity, which is not limited here.

[0081] Of course, a plurality of cavities 121 may be provided in the voice coil body 1, and the plurality of cavities 121 may be arranged at intervals in a direction from the inner side of the voice coil body 1 to the outer side of the voice coil body 1; and each cavity 121 may be arranged in a spiral shape in the voice coil body 1 in a direction from one end of the voice coil body 1 to the other end of the voice coil body 1, which is not limited here.

[0082] In one embodiment, on the axial cross section of the voice coil body 1, in the direction from one end of the voice coil body 1 to the other end of the voice coil body 1, the minimum spacing between two adjacent cavities 121 is greater than or equal to 0.05 mm. Figures 3 to 6 As shown, in the up-down direction, the minimum spacing between two adjacent cavities 121 is greater than or equal to 0.05 mm, which can effectively avoid the conductive members 2 in the two adjacent cavities 121 being isolated from each other and will not be affected by each other's electrical or magnetic properties.

[0083] In one embodiment, on the axial cross section of the voice coil body 1, the minimum spacing between two adjacent cavities 121 in the direction from the inner side of the voice coil body 1 to the outer side of the voice coil body 1 is greater than or equal to 0.05 mm. Figures 3 to 6 As shown, in the left-right direction, the minimum spacing between two adjacent cavities 121 is greater than or equal to 0.05 mm, which can effectively prevent the conductive members 2 in the two adjacent cavities 121 from being electrically connected to each other without being affected by each other's electrical or magnetic properties.

[0084] Optionally, on the axial cross section of the voice coil body 1 , the shape of the cavity 121 is a polygonal structure or a special-shaped structure such as a circle, an ellipse, a triangle, a square, a trapezoid or a wedge, which is not limited here.

[0085] In one embodiment, the shape of the cavity 121 can be circular, and the diameter of the cavity 121 is greater than or equal to 0.1 mm. It can be understood that such a configuration can ensure the structural stability and continuity of the conductive member 2 disposed in the cavity 121, thereby ensuring good conductivity.

[0086] In one embodiment, the lead 3 includes a cable 31 and a conductive column 32 . The conductive column 32 is preset at the connecting hole 122 . The conductive column 32 electrically connects the conductive member 2 and the cable 31 . The conductive column 32 is a high temperature resistant conductive sheet.

[0087] In this embodiment, if Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, by setting the lead 3 as a two-part structure of a conductive column 32 and a cable 31, the conductive column 32 can be pre-buried in the connecting hole 122, and the cable 31 can be welded to the conductive column 32 at the connecting hole 122. In this way, the conductive column 32 is used as a high-temperature resistant conductive sheet to facilitate the electrical connection between the cable 31 and the conductive member 2, and at the same time effectively avoid the cable 31 from being damaged or melted when the voice coil structure 100 is processed or working in a high-temperature environment.

[0088] In order to prevent the conductive member 2 in the cavity 121 from being exposed or leaking, in one embodiment, the voice coil structure 100 further includes a glue layer 4 , which covers the connecting hole 122 , and the lead wire 3 passes through the glue layer 4 and is connected to the conductive member 2 .

[0089] In this embodiment, if Figures 2 to 6 As shown, by providing the glue layer 4, the connecting hole 122 is covered or blocked by the glue layer 4. It can be understood that one end of the lead 3 passes through the glue layer 4 and is connected to the conductive member 2. Optionally, the glue layer 4 can be a plug or a sealing glue layer, which is not limited here.

[0090] Optionally, the adhesive layer 4 is elastic, so that when the voice coil structure 100 is used in a high temperature environment or a normal temperature environment, the air pressure in the cavity 121 expands and contracts due to the temperature, thereby utilizing the elasticity of the adhesive layer 4 to ensure the air pressure balance in the cavity 121 .

[0091] In one embodiment, the material of the adhesive layer 4 is epoxy resin or silicone.

[0092] In one embodiment, the voice coil body 1 includes a frame 11 and a shell 12, wherein the frame 11 is a cylindrical structure with openings at both ends, and the shell 12 is a cylindrical structure with openings at both ends. The shell 12 is connected to the inner side of the frame 11 and / or the outer side of the frame 11, and a cavity 121 is provided in the shell 12.

[0093] In this embodiment, if Figures 1 to 3 As shown, by setting the voice coil body 1 as a skeleton 11 and a shell 12, the shell 12 is supported or fixed by the skeleton 11, and the voice coil structure 100 is conveniently connected and fixed to the diaphragm 510 of the sound-generating device 800 through the skeleton 11. Optionally, the skeleton 11 is made of ceramic material or glass material. It can be understood that the cylindrical structure skeleton 11 with openings at both ends is formed by ceramic material or glass material.

[0094] It can be understood that the shell 12 may include one or more shells 12 that can be connected to the inner side of the skeleton 11; or, the shell 12 can be connected to the outer side of the skeleton 11; or, the shell 12 can be connected to the inner side of the skeleton 11 and the outer side of the skeleton 11, that is, a shell 12 is provided on the inner side of the skeleton 11 and the outer side of the skeleton 11, which is not limited here.

[0095] In this embodiment, a cavity 121 is provided in the shell 12. The shell 12 is a cylindrical structure with two ends open, that is, the cavity 121 is arranged in a spiral structure in the up and down directions along the circumference of the shell 12, and the conductive member 2 is arranged in the cavity 121 of the shell 12. Optionally, the shell 12 is made of ceramic material or glass material.

[0096] It is understandable that the housing 12 can be connected to the frame 11 by bonding. Of course, the housing 12 and the frame 11 can also be set as an integral structure; or, the housing 12 and the frame 11 can also be connected as an integral structure by a detachable connection method such as a snap connection, a plug-in fit, a screw connection or a pin connection, which is not limited here.

[0097] In one embodiment, along the axial direction of the voice coil body 1, the extension length of the housing 12 is less than or equal to the extension length of the frame 11. Optionally, the housing 12 is connected to one end of the frame 11.

[0098] In one embodiment, along the axial direction of the voice coil body 1, at least one end of the housing 12 is provided with a chamfer 123, and the radius of the chamfer 123 is in the range of 0.15 mm to 0.25 mm.

[0099] Understandable, such as Figures 1 to 6 As shown, by providing a chamfer 123 at the end of the shell 12, it is ensured that the end corners of the shell 12 are not sharp and meet the aerodynamic performance, so that no obvious wind resistance is generated when the voice coil structure 100 moves.

[0100] In this embodiment, the inner edges and / or outer edges of the upper end and the lower end of the shell 12 are both provided with chamfers 123 . Optionally, the radius of the chamfer 123 is in the range of 0.15 mm to 0.25 mm.

[0101] The present invention also proposes a method for manufacturing the above-mentioned voice coil structure 100. The specific structure of the voice coil structure 100 refers to the aforementioned embodiment. Since the sound-emitting device 800 adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0102] In this embodiment, the steps of the method for manufacturing the voice coil structure 100 include:

[0103] The voice coil body 1 is manufactured so that the voice coil body 1 is a cylindrical structure with two ends opened, and a cavity 121 and two communication holes 122 communicating with the cavity 121 are provided in the voice coil body 1;

[0104] The conductive substrate is melted, and the liquid conductive substrate is injected into the cavity 121 from the connecting hole 122 by an injection device, and cooled to form the conductive member 2;

[0105] The two lead wires 3 are respectively disposed at the two connecting holes 122 , so that the lead wires 3 are connected to the conductive member 2 .

[0106] In one embodiment, the steps of manufacturing the voice coil body 1 so that the voice coil body 1 is a cylindrical structure with two ends open, and the voice coil body 1 is provided with a cavity 121 and two connecting holes 122 connecting the cavity 121 include:

[0107] Winding the metal tin wire into a spiral shape on a coil winding machine, with spacing between adjacent layers of the metal tin wire to form a pre-shaped conductor;

[0108] Providing a mold, the mold having a cavity and an injection port connected to the cavity, fixing a pre-shaped wire in the cavity of the mold, injecting a base material into the cavity of the mold through the injection port, maintaining the mold temperature to shape the base material and evenly wrap the pre-shaped wire, and removing the mold to form a base shell and expose two connecting holes 122 of the pre-shaped wire;

[0109] Drying and densifying the base shell under high temperature environment to liquefy the pre-shaped conductor;

[0110] The compressed air is pressurized at one of the communication holes 122 to discharge the liquefied pre-shaped wire inside the base shell from another communication hole 122 to form a cavity 121 , thereby obtaining the voice coil body 1 .

[0111] It can be understood that a pre-shaped spiral pre-shaped wire is firstly prepared, that is, according to the wire design requirements of the voice coil structure 100, a metal tin wire of the same wire diameter is made, and the metal tin wire is wound into a spiral on a coil winding machine, and a gap of 0.05 mm is maintained between adjacent layers of tin wire. After the winding is completed, the pre-shaped wire is formed. Optionally, the interval between adjacent layers of metal tin wire is greater than or equal to 0.05 mm. Optionally, the diameter of the metal tin wire is optionally equivalent to the diameter of the conductive member 2.

[0112] In this embodiment, a mold having a cavity 121 is manufactured, that is, a mold of a shell 12 having a cavity 121 is manufactured using an aluminum alloy material, and the inner cavity of the mold is designed to have the same size as the outer size of the cavity 121 to ensure that the cavity 121 meets the design size of the voice coil structure 100, and the mold for manufacturing the shell 12 should chamfer the upper and lower inner edges with a chamfer radius of 0.2±0.05mm to ensure that the edges and corners of the shell 12 are not sharp and meet the aerodynamic performance, that is, no obvious wind resistance is generated when the voice coil moves.

[0113] The pre-shaped wire is fixed with a clamp. The fixed pre-shaped wire will be located in a suitable position of the cavity mold to ensure that the conductive part 2 has a suitable position in the cavity 121 of the shell 12, that is, the axis of the pre-shaped wire coincides with the axis of the cavity 121 of the mold, and the height of the pre-shaped wire is centered in the cavity mold. The ceramic base material or the glass base material is injected into the mold, and the mold temperature is maintained to form the material and evenly wrap the outside of the pre-shaped wire. After the ceramic base material or the glass base material is formed and stabilized, the mold and the clamp are removed. At this time, the pre-shaped wire is wrapped in the cavity 121 formed by the ceramic base material or the glass base material, and the base material is formed into a basic shell. At this time, the inside of the basic shell has a pre-shaped wire, a cavity 121 for accommodating the pre-shaped wire, and two connecting holes 122 that expose the pre-shaped wire.

[0114] The base shell is dried at an ambient temperature of 60°C to 80°C to dry the cavity 121. After drying, the base material is densified at an ambient temperature of 1300°C to 1400°C to form a dense porcelain body under a high temperature environment, so that the pre-shaped wire is liquefied under a high temperature environment to form a liquid. Then, pressurization is applied at one of the connecting holes 122, so that the compressed air discharges the liquefied pre-shaped wire inside the base shell from another connecting hole 122 to form a cavity 121, thereby obtaining the voice coil body 1.

[0115] In this embodiment, the conductive substrate that is solid at room temperature can be melted into a liquid state, or a conductive substrate that is liquid at room temperature can be directly selected, and the liquid conductive substrate is injected into the cavity 121 from the connecting hole 122 by an injection device, and cooled to form the conductive member 2. When a conductive substrate that is liquid at room temperature is selected, in this step, the voice coil body 1 and the liquid conductive substrate can be preheated to about 95° C., and the liquid conductive substrate can be injected from a connecting hole 122 of the voice coil body 1.

[0116] It is understandable that 95°C is to increase the fluidity of the liquid so that it can be injected into the cavity 121 more smoothly, while giving the liquid a certain degree of space for thermal expansion, thereby reducing the risk of the cavity 121 bursting due to thermal expansion when the voice coil structure 100 works at high temperature in the future. In actual applications, a suitable temperature can be selected according to the specific characteristics of the substrate, and the present invention is not limited here.

[0117] Optionally, at least one end of the voice coil body 1 is provided with a chamfer 123 , and the radius of the chamfer 123 is in the range of 0.15 mm to 0.25 mm.

[0118] In one embodiment, the steps of respectively disposing two lead wires 3 at two connecting holes 122 and connecting the lead wires 3 to the conductive member 2 include:

[0119] A highly heat-resistant conductive column 32 is pre-buried at the connecting hole 122 to connect the conductive column 32 to the conductive member 2;

[0120] Seal the communication hole 122 with high temperature resistant epoxy glue to form a glue layer 4;

[0121] The cable 31 is welded to the conductive post 32 at the connecting hole 122 to form a lead, so that the cable 31 is electrically connected to the conductive member 2 through the conductive post 32 .

[0122] In this embodiment, a conductive column 32 is pre-buried at the connecting hole 122. Optionally, the conductive column 32 is a high-temperature-resistant tungsten alloy conductor sheet for connecting the cable 31 of the lead 3. Finally, the connecting hole 122 is sealed with high-temperature resistant epoxy glue to form a glue layer 4. The glue is elastic and can maintain the sealing of the cavity 121 and the continuity of the conductive part 2 when the conductive part 2 expands and contracts.

[0123] It can be understood that the voice coil body 1 includes a shell 12 and a frame 11 , glue is applied to the frame 11 , and the shell 12 of the porcelain-sealed coil module is assembled to the corresponding position of the frame 11 to form a porcelain-sealed high-temperature-resistant voice coil structure 100 .

[0124] It can be understood that the shell 12 of the voice coil structure 100 is scratch-resistant and the ceramic material is hard. During transportation and assembly, the conductive part 2 can be protected from damage and has excellent aerodynamic performance. Since the voice coil wire (i.e., the conductive part 2) is not exposed, there is no groove between adjacent wires. During the up and down movement of the voice coil structure 100, the turbulence and eddy current generated by the groove are avoided, and the aerodynamic performance is better. At the same time, the voice coil can be assembled modularly, and the porcelain-sealed shell 12 and the conductive part 2 are mass-produced separately, and finally assembled with the voice coil frame 11 and the lead 3. The voice coil structure 100 is manufactured modularly, which reduces the difficulty of process assembly to a certain extent. Furthermore, because the boiling point of the liquid conductive part 2 is high, when the working and ambient temperatures are high, the conductive part 2 is still sealed in the cavity 121, and will not be broken or short-circuited. Therefore, it can continue to work under high temperature conditions and is resistant to high temperatures.

[0125] like Figure 7As shown, the present invention further proposes a sound-generating device 800, which includes the above-mentioned voice coil structure 100. The specific structure of the voice coil structure 100 refers to the aforementioned embodiment. Since the sound-generating device 800 adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0126] In this embodiment, if Figure 7 As shown, the sound-generating device 800 includes a vibration system 500 and a magnetic circuit system 600 . The magnetic circuit system 600 is provided with a magnetic gap 610 . The vibration system 500 includes a diaphragm 510 and a voice coil structure 100 . One end of the voice coil structure 100 is connected to the diaphragm 510 , and the other end of the voice coil structure 100 is suspended in the magnetic gap 610 .

[0127] It can be understood that the sound-generating device 800 also includes a basin frame 700, which has a receiving cavity, and the vibration system 500 and the magnetic circuit system 600 are received in the basin frame 700, and the diaphragm 510 of the vibration system 500 is connected to one end of the basin frame 700, and the magnetic circuit system 600 is connected to the other end of the basin frame 700 and is opposite to the diaphragm 510.

[0128] In this embodiment, the magnetic circuit system 600 includes a central magnetic circuit portion and a side magnetic circuit portion. The side magnetic circuit portion is arranged on the outside of the central magnetic circuit portion and is spaced from the central magnetic circuit portion to cooperate to form a magnetic gap 610. One end of the voice coil structure 100 is connected to the side of the diaphragm 510 facing the magnetic circuit system 600, and the other end of the voice coil structure 100 is suspended in the magnetic gap 610.

[0129] It can be understood that the sound-generating device 800 also includes a centering support plate, one end of which is connected to the basin frame 700, and the other end is connected to the frame 11 or the shell 12 of the voice coil structure 100. In this way, the centering support plate can be used to suppress the swing or polarization of the voice coil structure 100 during the vibration process, thereby effectively improving the acoustic performance of the sound-generating device 800.

[0130] The present invention further provides an electronic device, comprising a device housing and the above-mentioned sound-generating device 800, wherein the sound-generating device 800 is disposed in the device housing. The specific structure of the sound-generating device 800 refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0131] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A voice coil structure, which is applied to a sound-generating device, characterized in that: The voice coil structure comprises: A voice coil body, wherein the voice coil body is a cylindrical structure with two ends open, a cavity is provided in the voice coil body, and two communication holes are provided in the voice coil body to communicate with the cavity; a conductive member disposed in the cavity; and Two lead wires, each of which is arranged at one of the connecting holes and connected to the conductive member.

2. The voice coil structure according to claim 1, characterized in that: The conductive member is a solid conductive member, and the solid conductive member is filled in the cavity.

3. The voice coil structure according to claim 2, characterized in that: The material of the solid conductive member is tin, copper, aluminum, tungsten, silver, gold, iron, nickel, lead, magnesium, zinc, molybdenum, yttrium, tungsten, or cobalt; And / or, the solid conductive member is melted and injected into the cavity from the connecting hole, and is cooled to form the solid conductive member.

4. The voice coil structure according to claim 1, characterized in that: The conductive member is a liquid conductive member, and the liquid conductive member is injected into the cavity from the connecting hole and fills the cavity.

5. The voice coil structure according to claim 1, characterized in that: The cavity is arranged in a spiral shape in the voice coil body in a direction from one end of the voice coil body to the other end of the voice coil body.

6. The voice coil structure according to claim 5, characterized in that: The cavities are arranged at intervals in a direction from the inner side of the voice coil body to the outer side of the voice coil body.

7. The voice coil structure according to claim 6, characterized in that: On the axial cross section of the voice coil body; A minimum spacing between two adjacent cavities along a direction from one end of the voice coil body to the other end of the voice coil body is greater than or equal to 0.05 mm; and / or a minimum spacing between two adjacent cavities along a direction from an inner side of the voice coil body to an outer side of the voice coil body is greater than or equal to 0.05 mm.

8. The voice coil structure according to claim 1, characterized in that: On the axial cross section of the voice coil body, the shape of the cavity is circular, elliptical, triangular, square, trapezoidal or wedge-shaped; And / or, the diameter of the cavity is greater than or equal to 0.1 mm; And / or, a plurality of the cavities are provided in the voice coil body, and the plurality of the cavities are arranged at intervals along a direction from an inner side of the voice coil body to an outer side of the voice coil body; and each of the cavities is arranged in a spiral shape in the voice coil body along a direction from one end of the voice coil body to the other end of the voice coil body.

9. The voice coil structure according to claim 1, characterized in that: The lead includes a cable and a conductive column, the conductive column is preset at the connecting hole, the conductive column electrically connects the conductive member and the cable, and the conductive column is a high temperature resistant conductive sheet.

10. The voice coil structure according to claim 1, characterized in that: The voice coil structure further includes a glue layer, the glue layer covers the connecting hole, the lead wire passes through the glue layer and is connected to the conductive member.

11. The voice coil structure according to claim 10, characterized in that: The adhesive layer is elastic; And / or, the adhesive layer is made of epoxy resin or silicone.

12. The voice coil structure according to any one of claims 1 to 11, characterized in that: The voice coil body comprises: A skeleton, the skeleton being a cylindrical structure with openings at both ends; and The shell is a cylindrical structure with openings at both ends, the shell is connected to the inner side of the frame and / or the outer side of the frame, and the cavity is arranged in the shell.

13. The voice coil structure according to claim 12, characterized in that: Along the axial direction of the voice coil body, the extension length of the housing is less than or equal to the extension length of the frame; And / or, the shell is made of ceramic material or glass material; And / or, the skeleton is made of ceramic material or glass material; And / or, along the axial direction of the voice coil body, at least one end of the housing is provided with a chamfer, and the radius of the chamfer is in the range of 0.15 mm to 0.25 mm.

14. A method for manufacturing a voice coil structure according to any one of claims 1 to 13, characterized in that: The steps of the method for manufacturing the voice coil structure include: Manufacturing a voice coil body, so that the voice coil body is a cylindrical structure with two ends open, and a cavity and two communication holes communicating with the cavity are provided in the voice coil body; Melting the conductive substrate, injecting the liquid conductive substrate into the cavity from the communicating hole by means of an injection device, and cooling to form a conductive member; Two lead wires are respectively arranged at the two communicating ports, so that the lead wires are connected to the conductive member.

15. The method for manufacturing a voice coil structure according to claim 14, characterized in that: The step of manufacturing the voice coil body so that the voice coil body is a cylindrical structure with two ends open, and a cavity and two connecting holes connecting the cavity are provided in the voice coil body comprises: Winding the metal tin wire into a spiral shape on a coil winding machine, with spacing between adjacent layers of the metal tin wire to form a pre-shaped conductor; Providing a mold, the mold having a cavity and an injection port connected to the cavity, fixing the pre-shaped wire in the cavity of the mold, injecting a base material into the cavity of the mold through the injection port, maintaining the mold temperature to shape the base material and evenly wrap the pre-shaped wire, and removing the mold to form a base shell and expose the two communication ports of the pre-shaped wire; Drying and densifying the base shell under high temperature environment to liquefy the pre-shaped wire; Pressurizing one of the communication ports causes the compressed air to discharge the liquefied pre-shaped wire inside the basic shell from another communication port to form a cavity, thereby obtaining the voice coil body.

16. The method for manufacturing a voice coil structure according to claim 15, characterized in that: The spacing between the metal tin wires in adjacent layers is greater than or equal to 0.05 mm; And / or, the diameter of the metal tin wire is equivalent to the diameter of the conductive member; And / or, at least one end of the voice coil body is provided with a chamfer, and the radius of the chamfer is in the range of 0.15 mm to 0.25 mm; And / or, the drying temperature is 60°C to 80°C, and the ambient temperature of the high temperature environment is 1300°C to 1400°C.

17. The method for manufacturing a voice coil structure according to claim 14, characterized in that: The step of respectively arranging two lead wires at the two communication ports to connect the lead wires with the conductive member comprises: Pre-buried high temperature resistant conductive pillars at the connecting openings, so that the conductive pillars are connected to the conductive members; Sealing the communication port with high temperature resistant epoxy glue to form a glue layer; The cable is welded to the conductive post at the communication port to form the lead, so that the cable is electrically connected to the conductive member through the conductive post.

18. A sound-generating device, characterized in that: The sound-generating device includes a vibration system and a magnetic circuit system, the magnetic circuit system is provided with a magnetic gap, the vibration system includes a diaphragm and a voice coil structure as described in any one of claims 1 to 13, one end of the voice coil structure is connected to the diaphragm, and the other end of the voice coil structure is suspended in the magnetic gap.

19. An electronic device, characterized in that: It comprises a device housing and a sound-generating device as claimed in claim 18, wherein the sound-generating device is arranged in the device housing.

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