Voice coil assembly tool, voice coil assembly method and voice coil

Abstract

This invention belongs to the field of loudspeaker technology and discloses a voice coil assembly fixture, a voice coil assembly method, and a voice coil. The voice coil assembly fixture includes a mounting shaft, a connecting shaft, a mounting sleeve, and a push ring. The connecting shaft extends along the installation direction and is coaxially arranged with the mounting shaft. A frame can be fitted onto the mounting shaft, with one end face of the frame flush with a predetermined end face of the mounting shaft. The mounting sleeve is fitted onto the connecting shaft and is coaxially arranged with it. The coil is movably fitted onto the mounting sleeve along the extension direction of the mounting sleeve. The push ring is movably fitted onto the mounting sleeve along the installation direction. When the push ring is moved, it contacts the coil on the mounting sleeve and pushes the coil towards the frame, so that one end face of the coil is flush with the predetermined end face of the mounting shaft. This voice coil assembly fixture eliminates the empty blank area on the frame, increases the effective working length of the coil in the magnetic circuit, improves the sound sensitivity and acoustic performance of the device, and extends the service life of the voice coil.

Description

Technical Field

[0001] This invention relates to the field of loudspeaker technology, and in particular to a voice coil assembly fixture, a voice coil assembly method, and a voice coil. Background Technology

[0002] The voice coil relies on the Ampere force acting on a current-carrying coil in a constant magnetic field to realize the mutual conversion of electrical energy and mechanical energy. It is a key structure to ensure sound production effect and precise linear transmission performance, and is widely used in sound-producing devices such as loudspeakers, Bluetooth headsets, and audio-visual equipment.

[0003] In existing technologies, voice coils are generally manufactured by winding enameled wire layer by layer around an insulating frame. Due to limitations of traditional winding processes and molding die structures, existing voice coils have empty areas at the ends of the insulating frame where enameled wire cannot be wound. When the voice coil is assembled into the magnetic circuit, the overall assembly height and magnetic gap space constraints prevent the coil ends from being fully placed within the effective magnetic field range. This significantly shortens the effective operating length of the coil in the magnetic circuit, reducing the device's sound sensitivity and acoustic performance, affecting the voice coil's operational stability, and shortening its lifespan.

[0004] Therefore, there is an urgent need for a voice coil assembly fixture, a voice coil assembly method, and a voice coil in order to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a voice coil assembly fixture, a voice coil assembly method, and a voice coil, which eliminates the empty blank area on the frame, increases the effective working length of the coil in the magnetic circuit, improves the sound sensitivity and acoustic performance of the device, and extends the service life of the voice coil.

[0006] To achieve this objective, the present invention adopts the following technical solution: In a first aspect, a voice coil assembly fixture is provided, wherein the voice coil includes a frame and a coil sleeved on the frame, and the voice coil assembly fixture includes: The mounting shaft and the connecting shaft extend along the installation direction and are arranged coaxially with the mounting shaft. The preset end of the mounting shaft is connected to the connecting shaft, and the skeleton can be fitted onto the mounting shaft. The mounting sleeve is fitted onto the connecting shaft and arranged coaxially with the connecting shaft. The coil can be movably fitted onto the mounting sleeve along the extension direction of the mounting sleeve. The push ring is movably fitted onto the mounting cylinder along the installation direction. When the push ring is driven to move, it can contact the coil on the mounting cylinder and push the coil toward the frame.

[0007] Optionally, the diameter of the connecting shaft is smaller than the diameter of the mounting shaft. When the connecting shaft is connected to the mounting sleeve, the mounting sleeve is fitted onto the connecting shaft and contacts the preset end face of the mounting shaft. The push ring has a moving state and an assembled state. In the moving state, the push ring moves relative to the mounting cylinder. In the assembled state, the push ring moves to a preset end of the mounting shaft, and at least part of the surface of the push ring facing the mounting shaft contacts the preset end face of the mounting shaft.

[0008] Optionally, the outer wall of the mounting cylinder is provided with a guide groove extending along the installation direction, and the inner wall of the push ring is provided with a guide part that slides in cooperation with the guide groove wall.

[0009] Optionally, multiple guide grooves and guide parts are provided, with multiple guide parts corresponding one-to-one with multiple guide grooves, and multiple guide parts are arranged at intervals along the circumference of the push ring.

[0010] Optionally, the outer wall of the connecting shaft is provided with an external thread, and the inner wall of the mounting cylinder is provided with an internal thread that mates with the external thread.

[0011] Secondly, a voice coil assembly method is provided, which uses the voice coil assembly fixture of the first aspect to connect the coil to the frame, including the following steps: S1. Install the coil into the mounting cylinder; Fit the skeleton onto the mounting shaft, and make the end face of one end of the skeleton flush with the preset end face of the mounting shaft. S2, push the ring sleeve to the mounting sleeve; S3. Drive the push ring to move along the installation direction. The push ring gradually contacts the coil and pushes the coil towards the frame until the coil is fitted onto the frame and the end face of one end of the coil is flush with the preset end face of the mounting shaft.

[0012] Optionally, a guide groove extending along the installation direction is provided on the outer wall of the mounting cylinder, and a guide part that slides with the guide groove is provided on the inner wall of the push ring, and the diameter of the connecting shaft is smaller than the diameter of the mounting shaft. Step S3 specifically includes the following steps: The push ring is driven to move along the mounting direction toward the mounting shaft. The surface of the guide part facing the mounting shaft gradually contacts the coil and pushes the coil toward the frame. The guide part slides in the guide groove until the surface of the guide part facing the mounting shaft contacts the preset end face of the mounting shaft.

[0013] Optionally, after step S1 and before step S2, the following step is also included: applying glue to the outer surface of the skeleton; In step S3, when the coil is fitted onto the frame, the glue is located between the coil and the frame; Step S3 is followed by the following step: curing the adhesive between the skeleton and the coil.

[0014] Optionally, step S1, which involves installing the coil into the mounting cylinder, specifically includes the following steps: The enameled wire is wound onto the outer wall of the mounting cylinder to form a coil; or, the coil is wound into shape on a winding machine, and then the shaped coil is fitted onto the mounting cylinder. In a third aspect, a voice coil is provided, assembled using the voice coil assembly method of the second aspect. The voice coil includes a frame and a coil fitted onto the frame, the frame and the coil are bonded together, and one end face of the coil is flush with one end face of the frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a voice coil assembly fixture, a voice coil assembly method, and a voice coil. The mounting shaft, connecting shaft, and mounting sleeve all extend along the installation direction and are coaxially arranged. When the bobbin is fitted onto the mounting shaft and the coil is fitted onto the mounting sleeve, the bobbin and coil are also coaxial. This allows the push ring to precisely push the coil onto the bobbin, ensuring the accuracy of the coil-bobbin assembly, improving the consistency of the voice coil assembly, and optimizing the electrical performance and operational stability of the voice coil. As the push ring moves, the surface of the push ring facing the coil can contact the coil and push it towards the bobbin. The coil gradually fits onto the bobbin until the end face of the coil that contacts the push ring is flush with the preset end face of the mounting shaft. At this point, the end face of the bobbin, which is flush with the preset end face of the mounting shaft, is also flush with the end face of the coil that contacts the push ring, ensuring that the end of the bobbin is also wound with coil, effectively eliminating any empty blank areas at the end of the bobbin. Compared to existing technologies, the voice coil assembly fixture provided by this invention eliminates any unused blank areas on the frame, allowing the coil end to be fully placed within the effective magnetic field range. This significantly increases the effective operating length of the coil in the magnetic circuit, improving the device's sound sensitivity and acoustic performance, and extending the voice coil's lifespan. Furthermore, the elimination of unused blank areas also shortens the overall length of the voice coil, enabling its application in miniature loudspeakers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the voice coil assembly fixture provided by the present invention; Figure 2 An exploded view of the voice coil assembly fixture provided by the present invention; Figure 3 This is a schematic diagram of the voice coil structure provided by the present invention; Figure 4 A flowchart of the voice coil assembly method provided by the present invention.

[0017] In the picture: 10. Skeleton; 20. Coil; 100, Mounting shaft; 110, Guide slope; 200, Connecting shaft; 300, Mounting cylinder; 310, Guide groove; 400, Push ring; 410, Guide section. Detailed Implementation

[0018] The present invention 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 invention 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 invention, and not all of the structures.

[0019] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0022] Example 1 like Figures 1 to 3 As shown, this embodiment provides a voice coil assembly fixture that eliminates the empty blank area on the frame 10, allowing the end of the coil 20 to be completely placed within the effective magnetic field range, increasing the effective working length of the coil 20 in the magnetic circuit, improving the device's sound sensitivity and acoustic performance, and extending the voice coil's service life.

[0023] See Figure 1 and Figure 2The voice coil includes a frame 10 and a coil 20 sleeved on the frame 10. The voice coil assembly fixture includes a mounting shaft 100, a connecting shaft 200, a mounting sleeve 300, and a push ring 400. The connecting shaft 200 is along the mounting direction ( Figure 1 The frame 10 extends in the X direction and is coaxially arranged with the mounting shaft 100. The preset end of the mounting shaft 100 is connected to the connecting shaft 200. The frame 10 can be fitted onto the mounting shaft 100. The mounting cylinder 300 is fitted onto the connecting shaft 200 and is coaxially arranged with the connecting shaft 200. The coil 20 can be movably fitted onto the mounting cylinder 300 along the extension direction of the mounting cylinder 300. The pushing ring 400 is movably fitted onto the mounting cylinder 300 along the installation direction. When the pushing ring 400 is driven to move, the pushing ring 400 can contact the coil 20 on the mounting cylinder 300 and push the coil 20 to move toward the frame 10.

[0024] The voice coil assembly fixture provided in this embodiment has a mounting shaft 100, a connecting shaft 200, and a mounting sleeve 300, all extending along the installation direction and arranged coaxially. When the frame 10 is fitted onto the mounting shaft 100 and the coil 20 is fitted onto the mounting sleeve 300, the frame 10 and the coil 20 are also in a coaxial state. In this way, the pushing ring 400 can accurately push the coil 20 onto the frame 10, ensuring the assembly accuracy of the coil 20 and the frame 10, improving the consistency of the voice coil assembly, and optimizing the electrical performance and working stability of the voice coil. When the push ring 400 moves, the surface of the push ring 400 facing the coil 20 can contact the coil 20 and push the coil 20 towards the frame 10. The coil 20 is gradually fitted onto the frame 10 until the end face of the coil 20 in contact with the push ring 400 is flush with the preset end face of the mounting shaft 100. At this time, the end face of the frame 10, which is flush with the preset end face of the mounting shaft 100, is also flush with the end face of the coil 20 in contact with the push ring 400, so that the end of the frame 10 is also wound with the coil 20, effectively eliminating the empty blank area at the end of the frame 10. Compared with the prior art, the frame 10 assembled using the voice coil assembly fixture provided in this embodiment has no empty blank area, so that the end of the coil 20 can be completely placed within the effective magnetic field range, significantly increasing the effective working length of the coil 20 in the magnetic circuit, improving the sound sensitivity and acoustic performance of the device, and extending the service life of the voice coil.

[0025] Specifically, when installing the frame 10, the end face of the frame 10 is made flush with the end face of the preset end of the mounting shaft 100, i.e., in the same plane. Then, the push ring 400 is driven to move, and the end face of the push ring 400 facing the mounting shaft 100 gradually contacts the coil 20 and pushes the coil 20 to move towards the frame 10, and the coil 20 is gradually put onto the frame 10. When the end face of the coil 20 that contacts the push ring 400 moves to be flush with the end face of the preset end of the mounting shaft 100, the drive ring 400 is stopped, thus completing the assembly of the coil 20 and the frame 10.

[0026] For example, see Figure 1 and Figure 2 The coil 20, frame 10, mounting shaft 100, connecting shaft 200, mounting cylinder 300 and push ring 400 all extend along the mounting direction.

[0027] Specifically, the outer wall of the mounting cylinder 300 is clearance-fitted with the inner wall of the coil 20, meaning the outer diameter of the mounting cylinder 300 is slightly smaller than the inner diameter of the coil 20. This design allows the coil 20 to move precisely on the mounting cylinder 300 without the mounting cylinder 300 wearing down the coil 20, thus improving the assembly accuracy of the coil 20 and the yield rate of the voice coil.

[0028] Optionally, see Figure 1 and Figure 2 The diameter of the connecting shaft 200 is smaller than the diameter of the mounting shaft 100. The mounting cylinder 300 is sleeved on the connecting shaft 200 and contacts the preset end face of the mounting shaft 100. The pushing ring 400 has a moving state and an assembled state. In the moving state, the pushing ring 400 moves relative to the mounting cylinder 300. In the assembled state, the pushing ring 400 moves to the preset end of the mounting shaft 100, and at least part of the surface of the pushing ring 400 facing the mounting shaft 100 contacts the preset end face of the mounting shaft 100. This configuration makes the connection between the connecting shaft 200 and the mounting shaft 100 stepped, and the preset end face of the mounting shaft 100 is a stepped surface. Therefore, the preset end face can effectively constrain the position of the mounting cylinder 300 along the installation direction, ensuring the assembly accuracy of the mounting cylinder 300 and the connecting shaft 200, and improving the consistency of the assembly between the coil 20 and the frame 10. When the push ring 400 switches to the moving state, it can push the coil 20 towards the frame 10, so that the coil 20 can gradually be fitted onto the frame 10. When the push ring 400 switches to the assembly state, the preset end face can constrain the further movement of the push ring 400, so that the coil 20 can automatically and stably remain in a state where the end face is flush with the end face of the frame 10, further improving the assembly accuracy of the coil 20 and the frame 10.

[0029] Specifically, see Figure 2 The mounting direction extends vertically, with the connecting shaft 200 positioned above the mounting shaft 100. The preset end is the upper end of the mounting shaft 100. The lower end face of the mounting cylinder 300 contacts the upper end face of the mounting shaft 100, and the upper end face of the frame 10 is flush with the upper end face of the mounting shaft 100. The push ring 400 is driven to move from top to bottom, allowing its lower end face to contact the upper end face of the coil 20 and push the coil 20 downwards. When the lower end face of the push ring 400 moves to contact the upper end face of the mounting shaft 100, the upper end face of the coil 20 is flush with the upper end face of the frame 10.

[0030] Optionally, see Figure 1 and Figure 2The outer wall of the mounting cylinder 300 is provided with a guide groove 310 extending along the mounting direction, and the inner wall of the pushing ring 400 is provided with a guide part 410 that slides in cooperation with the groove wall of the guide groove 310. The groove wall of the guide groove 310 can constrain the sliding direction of the guide part 410, so that the guide part 410 can only move along the mounting direction. Consequently, under the constraint of the guide part 410, the pushing ring 400 can only push the coil 20 to move along the mounting direction, further improving the assembly accuracy of the coil 20 and the frame 10.

[0031] In this embodiment, see Figure 1 and Figure 2 The surface of the guide portion 410 facing the mounting shaft 100 is flush with the surface of the push ring 400 facing the mounting shaft 100, meaning they are in the same plane. When the push ring 400 moves to the point where the surface of the guide portion 410 facing the mounting shaft 100 contacts the preset end face of the mounting shaft 100, the guide portion 410 can no longer move due to the constraint of the preset end face, and the push ring 400 can no longer move either. The push ring 400 automatically switches from the moving state to the assembly state, and the end face of the coil 20 is flush with the end face of the frame 10, with their relative positions no longer changing. This design not only effectively avoids the generation of empty blank areas, improves the device's sound sensitivity and acoustic performance, and extends the lifespan of the voice coil, but also reduces the difficulty of positioning the final position of the coil 20, improving assembly efficiency.

[0032] Specifically, the inner diameter of the push ring 400 is smaller than the outer diameter of the coil 20, so that the end face of the push ring 400 can push the coil 20 to move. When the push ring 400 is in the assembled state, only the surface of the guide portion 410 facing the mounting shaft 100 contacts the preset end face of the mounting shaft 100.

[0033] In some embodiments, see Figure 2 A guide slope 110 is provided at the preset end of the mounting shaft 100. The guide slope 110 is inclined in a direction that forms an angle with the installation direction to guide the installation of the skeleton 10 on the mounting shaft 100 and improve the convenience of the connection operation between the skeleton 10 and the mounting shaft 100.

[0034] The length of the guide slope 110 along the installation direction is in the range of 0.001mm to 0.015mm, so as to avoid the guide slope 110 being too long and affecting the alignment effect between the end face of the coil 20 and the end face of the frame 10.

[0035] In some embodiments, see Figure 2Multiple guide grooves 310 and guide portions 410 are provided, with each guide portion 410 corresponding to a guide groove 310. The multiple guide portions 410 are arranged at intervals along the circumference of the push ring 400. This arrangement ensures that the push ring 400 is evenly stressed circumferentially and applies a uniform thrust to the coil 20 along its circumference. During the pushing process, there will be no misalignment between the push ring 400 and the mounting cylinder 300, ensuring the concentricity of the coil 20 and the frame 10. This improves the alignment accuracy and smoothness of the assembly between the frame 10 and the coil 20, and speeds up the assembly efficiency.

[0036] For example, see Figure 2 There are four guide grooves 310 and four guide parts 410, and the spacing between any two adjacent guide parts 410 is equal.

[0037] Optionally, the outer wall of the connecting shaft 200 is provided with an external thread, and the inner wall of the mounting cylinder 300 is provided with an internal thread that mates with the external thread. This design allows the mounting cylinder 300 to be detached from the connecting shaft 200, facilitating the installation of the coil 20 onto the mounting cylinder 300 and improving assembly convenience. Furthermore, the thread has a self-locking characteristic, ensuring a stable connection between the mounting cylinder 300 and the connecting shaft 200 without shaking or displacement, guaranteeing the concentricity of the coil 20 and the frame 10, and further improving the alignment accuracy and smoothness of the assembly between the frame 10 and the coil 20.

[0038] Specifically, when connecting the mounting cylinder 300 to the connecting shaft 200, insert the connecting shaft 200 into the inner cavity of the mounting cylinder 300 and screw the mounting cylinder 300 until the mounting cylinder 300 contacts the preset end face of the mounting shaft 100. The operation is convenient and quick.

[0039] Example 2 like Figures 1 to 4 As shown, this embodiment provides a voice coil assembly method, which uses the voice coil assembly fixture of Embodiment 1 to connect the coil 20 to the frame 10, including the following steps: S1. Install the coil 20 into the mounting cylinder 300; fit the frame 10 onto the mounting shaft 100, and make the end face of one end of the frame 10 flush with the preset end face of the mounting shaft 100.

[0040] In this embodiment, step S1, which involves installing the coil 20 onto the mounting cylinder 300, specifically includes the following steps: winding the enameled wire around the outer wall of the mounting cylinder 300 to form the coil 20; or, winding the coil 20 into shape on a winding machine and then fitting the formed coil 20 onto the mounting cylinder 300.

[0041] In other words, in this embodiment, the coil 20 can be formed on the mounting cylinder 300, or the coil 20 can be formed first and then fitted onto the mounting cylinder 300. This provides workers with a variety of options for actual operation, allowing them to flexibly choose the appropriate installation method according to the actual work situation, which significantly improves the convenience and flexibility of the workers' work.

[0042] In this embodiment, step S1, which involves fitting the skeleton 10 onto the mounting shaft 100, specifically includes the following steps: inserting the mounting shaft 100 into the skeleton 10 and moving it within the skeleton 10 until the preset end face of the mounting shaft 100 is flush with one end face of the skeleton 10.

[0043] Specifically, see Figure 2 The specific steps for fitting the frame 10 onto the mounting shaft 100 include: inserting the connecting shaft 200 into the frame 10 from bottom to top and moving it within the frame 10 cavity; the connecting shaft 200 gradually passes through the cavity of the frame 10 and the mounting shaft 100 gradually enters the cavity of the frame 10 until the upper end face of the mounting shaft 100 and the upper end face of the frame 10 are in the same plane.

[0044] In some embodiments, the outer wall of the connecting shaft 200 is provided with an external thread, and the inner wall of the mounting cylinder 300 is provided with an internal thread that mates with the external thread. Step S1 specifically includes the following steps: Tighten the mounting sleeve 300 to remove it from the connecting shaft 200; then, install the coil 20 onto the mounting sleeve 300 and fit the frame 10 onto the mounting shaft 100; next, insert the connecting shaft 200 into the inner cavity of the mounting sleeve 300 and tighten the mounting sleeve 300 until the end face of the mounting sleeve 300 facing the mounting shaft 100 contacts the preset end face of the mounting shaft 100.

[0045] This operation allows the installer to remove the mounting sleeve 300 from the connecting shaft 200 for installation of the coil 20, improving the convenience of assembly and effectively preventing the coil 20 from being bumped or damaged, thus ensuring the yield rate of the voice coil.

[0046] S2. Move the 400 sets of push rings to the 300 mounting cylinder.

[0047] Specifically, see Figure 2 Step S2 includes the following steps: rotating the push ring 400 about the axial direction of the push ring 400 until the guide part 410 is coaxial with the guide groove 310; then, inserting the mounting cylinder 300 into the inner hole of the push ring 400, and the guide part 410 is embedded in the guide groove 310.

[0048] S3. Drive the push ring 400 to move along the installation direction. The push ring 400 gradually contacts the coil 20 and pushes the coil 20 to move towards the frame 10 until the coil 20 is fitted onto the frame 10 and the end face of one end of the coil 20 is flush with the preset end face of the mounting shaft 100.

[0049] In step S1, the end face of one end of the skeleton 10 is made flush with the preset end face of the mounting shaft 100. Then, when the end face of the coil 20 in contact with the push ring 400 is flush with the preset end face of the mounting shaft 100, the end face of the skeleton 10, which is flush with the preset end face of the mounting shaft 100, is automatically flush with the end face of the coil 20 in contact with the push ring 400. This effectively eliminates the empty blank area on the skeleton 10, significantly increases the effective working length of the coil 20 in the magnetic circuit, improves the sound sensitivity and acoustic performance of the device, and extends the service life of the voice coil.

[0050] The voice coil assembly method provided in this embodiment can not only accurately fit the coil 20 onto the frame 10, improving the consistency of voice coil assembly and optimizing the electrical performance and working stability of the voice coil; it can also make one end of the coil 20 flush with one end of the frame 10, eliminating the empty blank area on the frame 10, increasing the effective working length of the coil 20 in the magnetic circuit, preventing the coil 20 from being exposed outside the magnetic circuit, improving the sound sensitivity and acoustic performance of the device, and extending the service life of the voice coil.

[0051] In this embodiment, see Figure 1 and Figure 2 The outer wall of the mounting cylinder 300 is provided with a guide groove 310 extending along the installation direction, and the inner wall of the push ring 400 is provided with a guide part 410 that slides with the guide groove 310. The diameter of the connecting shaft 200 is smaller than the diameter of the mounting shaft 100.

[0052] Step S3 specifically includes the following steps: driving the push ring 400 to move towards the mounting shaft 100 along the mounting direction, the surface of the guide part 410 facing the mounting shaft 100 gradually contacts the coil 20 and pushes the coil 20 towards the frame 10, the guide part 410 slides in the guide groove 310 until the surface of the guide part 410 facing the mounting shaft 100 contacts the preset end face of the mounting shaft 100.

[0053] When the guide portion 410 moves towards the surface of the mounting shaft 100 until it contacts the preset end face of the mounting shaft 100, under the constraint of the preset end face, the guide portion 410 can no longer move, and the push ring 400 can no longer move. The push ring 400 automatically switches from the moving state to the assembly state, and the end face of the coil 20 is flush with the end face of the frame 10, and their relative positions no longer change. This setting not only effectively avoids the generation of empty blank areas, improves the sound sensitivity and acoustic performance of the device, and extends the service life of the voice coil, but also reduces the difficulty of locating the final position of the coil 20 and improves the assembly efficiency.

[0054] Optionally, the process includes the following steps after step S1 and before step S2: applying adhesive to the outer surface of the frame 10; in step S3, when the coil 20 is fitted onto the frame 10, the adhesive is located between the coil 20 and the frame 10; after step S3, the process includes the following step: curing the adhesive between the frame 10 and the coil 20. After the adhesive cures, the coil 20 and the frame 10 can be reliably bonded, improving assembly compatibility and finished product yield. The reliably bonded coil 20 and frame 10 not only effectively prevent the coil 20 from shifting or deviating during the voice coil's movement, improving the vibration stability of the voice coil and the sound quality of the sound-producing device, but also enhance the overall structural strength of the voice coil, improve its vibration and impact resistance, and extend its overall service life.

[0055] Specifically, the curing methods of the adhesive include, but are not limited to, natural curing at room temperature, curing by heating and baking, and curing by ultraviolet light irradiation. These curing methods are existing technologies in this field and will not be described in detail here.

[0056] Specifically, when curing the adhesive, the skeleton 10 and the coil 20 can be removed from the mounting shaft 100 before curing, or the skeleton 10 and the coil 20 can be removed from the mounting shaft 100 together after curing is completed on the mounting shaft 100.

[0057] Example 3 like Figure 1 As shown, this embodiment provides a voice coil, which is assembled using the voice coil assembly method of Embodiment 2. The voice coil includes a frame 10 and a coil 20 sleeved on the frame 10. The frame 10 and the coil 20 are bonded together, and the end face of one end of the coil 20 is flush with the end face of one end of the frame 10.

[0058] The voice coil in this embodiment is assembled using the voice coil assembly method of Embodiment Two. The empty blank area on its frame 10 is effectively eliminated, and the end of the coil 20 can be completely placed within the effective magnetic field range. The end of the coil 20 is not exposed outside the magnetic circuit, significantly increasing the effective operating length of the coil 20 in the magnetic circuit, improving the device's sound sensitivity and acoustic performance, and extending the voice coil's lifespan. Furthermore, the elimination of the empty blank area also shortens the overall length of the voice coil, allowing the voice coil of this embodiment to be used in miniature loudspeakers.

[0059] In the prior art, most miniature loudspeakers' voice coils only include the coil 20 without the frame 10. The coil 20 is directly connected to the miniature diaphragm, resulting in a short effective working length of the coil 20 in the magnetic circuit. Consequently, when the voice coil drives the diaphragm to vibrate and produce sound, the coil 20 is exposed outside the magnetic circuit. In this embodiment, the overall length of the voice coil is shorter, allowing it to be installed in the miniature loudspeaker without exposing the end of the coil 20.

[0060] In this embodiment, the skeleton 10 is formed by winding a sheet material or by using a seamless metal tube, as long as the surface of the skeleton 10 is flat and smooth.

[0061] For example, the wall thickness of the skeleton 10 is in the range of 0.03mm to 0.2mm, including but not limited to 0.03mm, 0.035mm, 0.05mm, 0.075mm, 0.1mm, 0.125mm, and 0.15mm.

[0062] In this embodiment, the material of the skeleton 10 includes, but is not limited to, a combination of all polyimide, a combination of polyimide and aluminum, and a combination of all aluminum. These materials combine high insulation with the thermal conductivity and heat dissipation performance of metal, which can quickly dissipate the working heat of the coil 20 and ensure the stability of the voice coil.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A voice coil assembly fixture, wherein the voice coil includes a frame (10) and a coil (20) sleeved on the frame (10), characterized in that, The voice coil assembly fixture includes: The mounting shaft (100) and the connecting shaft (200) extend along the mounting direction and are coaxially arranged with the mounting shaft (100). The preset end of the mounting shaft (100) is connected to the connecting shaft (200). The skeleton (10) can be fitted onto the mounting shaft (100). The mounting sleeve (300) is sleeved on the connecting shaft (200) and arranged coaxially with the connecting shaft (200). The coil (20) can be movably sleeved onto the mounting sleeve (300) along the extending direction of the mounting sleeve (300). The push ring (400) is movably sleeved on the mounting cylinder (300) along the installation direction. When the push ring (400) is driven to move, the push ring (400) can contact the coil (20) on the mounting cylinder (300) and push the coil (20) to move toward the frame (10).

2. The voice coil assembly fixture according to claim 1, characterized in that, The diameter of the connecting shaft (200) is smaller than the diameter of the mounting shaft (100), and the mounting sleeve (300) is sleeved on the connecting shaft (200) and contacts the preset end face of the mounting shaft (100). The push ring (400) has a moving state and an assembled state. In the moving state, the push ring (400) moves relative to the mounting cylinder (300). In the assembled state, the push ring (400) moves to a preset end of the mounting shaft (100), and at least part of the surface of the push ring (400) facing the mounting shaft (100) contacts the preset end face of the mounting shaft (100).

3. The voice coil assembly fixture according to claim 1, characterized in that, The outer wall of the mounting cylinder (300) is provided with a guide groove (310) extending along the mounting direction, and the inner wall of the push ring (400) is provided with a guide part (410) that slides with the groove wall of the guide groove (310).

4. The voice coil assembly fixture according to claim 3, characterized in that, Multiple guide grooves (310) and multiple guide parts (410) are provided. The multiple guide parts (410) correspond one-to-one with the multiple guide grooves (310). The multiple guide parts (410) are arranged at intervals along the circumference of the push ring (400).

5. The voice coil assembly fixture according to claim 1, characterized in that, The outer wall of the connecting shaft (200) is provided with an external thread, and the inner wall of the mounting cylinder (300) is provided with an internal thread that mates with the external thread.

6. A voice coil assembly method, characterized in that, Connecting the coil (20) to the frame (10) using the voice coil assembly fixture as described in any one of claims 1-5 includes the following steps: S1. Install the coil (20) into the mounting cylinder (300); Fit the skeleton (10) onto the mounting shaft (100) and make the end face of one end of the skeleton (10) flush with the preset end face of the mounting shaft (100). S2. Fit the push ring (400) onto the mounting cylinder (300). S3. Drive the push ring (400) to move along the installation direction. The push ring (400) gradually contacts the coil (20) and pushes the coil (20) towards the frame (10) until the coil (20) is fitted onto the frame (10) and the end face of one end of the coil (20) is flush with the preset end face of the mounting shaft (100).

7. The voice coil assembly method according to claim 6, characterized in that, The outer wall of the mounting cylinder (300) is provided with a guide groove (310) extending along the mounting direction, and the inner wall of the push ring (400) is provided with a guide part (410) that slides with the guide groove (310). The diameter of the connecting shaft (200) is smaller than the diameter of the mounting shaft (100). Step S3 specifically includes the following steps: The push ring (400) is driven to move toward the mounting shaft (100) along the mounting direction. The surface of the guide part (410) facing the mounting shaft (100) gradually contacts the coil (20) and pushes the coil (20) toward the skeleton (10). The guide part (410) slides in the guide groove (310) until the surface of the guide part (410) facing the mounting shaft (100) contacts the preset end face of the mounting shaft (100).

8. The voice coil assembly method according to claim 6, characterized in that, The steps following step S1 and before step S2 include: applying glue to the outer surface of the skeleton (10); In step S3, when the coil (20) is fitted onto the skeleton (10), the glue is located between the coil (20) and the skeleton (10); Step S3 is followed by the following step: curing the adhesive between the skeleton (10) and the coil (20).

9. The voice coil assembly method according to claim 6, characterized in that, Step S1, installing the coil (20) into the mounting cylinder (300), specifically includes the following steps: The enameled wire is wound around the outer wall of the mounting cylinder (300) to form the coil (20); or the coil (20) is wound into shape on a winding machine and then the shaped coil (20) is fitted onto the mounting cylinder (300).

10. A voice coil, characterized in that, The voice coil is assembled using the voice coil assembly method as described in any one of claims 6-9, wherein the voice coil includes the skeleton (10) and the coil (20) sleeved on the skeleton (10), the skeleton (10) is bonded to the coil (20), and the end face of one end of the coil (20) is flush with the end face of one end of the skeleton (10).

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