A loudspeaker manufacturing method and a loudspeaker

Abstract

The application discloses a loudspeaker manufacturing method and loudspeaker, which comprises the following steps: designing the edge voice coil as a ring shape, embedding the edge voice coil into the base frame from the lower side of the base frame, and arranging two downward positioning folding feet on both sides of the long axis direction of the edge voice coil; designing positioning grooves corresponding to the positioning folding feet on both sides of the inner side of the edge magnet; positioning and bonding the edge magnet on the edge voice coil to form an edge magnetic circuit; positioning and bonding the main magnet on the U cup and positioning and bonding the voice coil on the main magnet to form a main magnetic circuit; magnetizing the edge magnetic circuit and the main magnetic circuit; fixing the voice coil with the installed diaphragm into the base frame from the upper side of the base frame, implanting the FPC into the base frame from the lower side of the base frame and connecting the FPC with the voice coil, and embedding the U cup into the base frame from the lower side of the base frame. The application reduces the assembly difficulty of the loudspeaker and saves the working hours.

Description

Technical Field

[0001] This invention relates to the field of loudspeaker manufacturing technology, specifically to a method for manufacturing a loudspeaker and the loudspeaker itself. Background Technology

[0002] The side magnet and main magnet are mostly bonded to the U-cup. After magnetization, they are installed into the base frame to complete the magnetic circuit installation. However, with the miniaturization of electronic products, the space for speakers is becoming increasingly compact. At this point, the voice coil and FPC are already connected to the base frame, further limiting the space. Assembling the magnetic circuit on the base frame in this limited space makes it easy for the magnetic circuit to interfere with the FPC, resulting in high assembly difficulty and low assembly efficiency. In addition, when magnetizing the side magnet and main magnet together, due to the attraction between them, it is necessary to wait for the side magnet and main magnet to be completely cured with the U-cup before magnetization can proceed. Otherwise, the side magnet is prone to displacement or falling off during the magnetization process, making the process time-consuming.

[0003] For example, the utility model patent with authorization announcement number CN206775728U and titled "A Side Magnet Recession Structure for a Five-Magnet Electromagnetic Loudspeaker" discloses the relevant content. The side magnet and the main magnet are first positioned in the U-cup. Before magnetization, it is necessary to wait for the side magnet and the main magnet to be completely solidified on the U-cup. In addition, when it is installed into the base frame, the pin position of the voice coil needs to be adjusted to maintain a certain gap with the side magnet, which increases the assembly difficulty. Summary of the Invention

[0004] One of the objectives of this invention is to provide a method for manufacturing a loudspeaker, which aims to reduce the assembly difficulty of the loudspeaker and save labor time.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for manufacturing a loudspeaker, comprising:

[0007] The edge washer is designed as a ring and is embedded in the base frame from the lower side. Two downward positioning feet are set on each side of the long axis of the edge washer. Positioning grooves corresponding to the positioning feet are designed on both sides of the inner side of the edge magnet. The edge magnet is positioned and glued to the edge washer to form the edge magnetic circuit.

[0008] Position and attach the main magnet to the U-cup, and position and attach the washer to the main magnet to form the main magnetic circuit;

[0009] Magnetize the adjacent magnetic circuit and the main magnetic circuit;

[0010] The voice coil with the diaphragm installed is fixed in the base frame from the top side. Positioning marks are provided at the connection position of the straight segment and the arc segment on the long axis side of the voice coil. The distance between the outer or inner sides of the two positioning feet on the long axis side of the washer is equal to the length of the straight segment on the long axis side of the voice coil and corresponds one-to-one with the positioning marks. The voice coil is positioned and checked at three points using the positioning marks and the outer or inner sides of the positioning feet. After the voice coil position is checked and found to be correct, the FPC is implanted on the lower side of the base frame and connected to the voice coil. The U-cup is then embedded into the base frame from the lower side.

[0011] Furthermore, a clearance groove is formed on the lower side of the base corresponding to the position of the FPC to allow the process pins of the FPC to extend; after the connection between the FPC and the voice coil is completed, the process pins are cut off; a baffle foot corresponding to the clearance groove is provided on the edge of the U cup to cover the clearance groove.

[0012] Furthermore, the edge design of the diaphragm includes a first flat segment extending outward, a vertical segment extending vertically upward from the edge of the first flat segment, and a second flat segment extending outward or inward from the edge of the vertical segment; a first glue groove is designed on the base frame corresponding to the lower edge of the first flat segment, glue is injected into the first glue groove, and the lower side of the first flat segment is connected to the first glue groove; a front cover mounting position is provided on the upper side of the base frame, and the front cover is glued to the upper side of the first flat segment through the front cover mounting position. A second glue groove is formed between the outer edge of the front cover and the edge of the front cover mounting position to accommodate the vertical segment and the second flat segment, and glue is injected into the second glue groove.

[0013] Furthermore, a sealing groove is designed on the outer circumference of the upper side of the base frame, and the sealing groove includes at least one O-ring; depending on the waterproof level requirements, an O-ring is fitted on the O-ring or a sealing ring is injected into the sealing groove.

[0014] The second objective of this invention is to provide a loudspeaker that reduces the difficulty of loudspeaker assembly, saves labor time, and improves drop resistance.

[0015] To achieve the above objectives, the present invention adopts the following technical solution:

[0016] A loudspeaker comprising:

[0017] Base frame;

[0018] The side magnetic circuit includes a side washer and a side magnet. The side washer is ring-shaped and is embedded in the base frame from the lower side. Two downward positioning feet are provided on each side of the long axis of the side washer. Positioning grooves corresponding to the positioning feet are provided on both sides of the inner side of the side magnet. The side magnet is positioned and adhered to the side washer.

[0019] The voice coil and diaphragm are connected and then fixed in the base frame by the upper side of the base frame;

[0020] FPC is implanted into the base frame from the lower side and connected to the voice coil;

[0021] The main magnetic circuit includes a U-cup, a main magnet bonded to the upper side of the U-cup, and a washer bonded to the upper side of the main magnet. The U-cup is embedded in the base frame from the lower side of the base frame.

[0022] Furthermore, a clearance groove is formed on the lower side of the base corresponding to the position of the FPC to allow the process pins of the FPC to extend, and a baffle foot corresponding to the clearance groove is provided on the edge of the U cup to cover the clearance groove.

[0023] Furthermore, the upper side of the base frame is provided with a recessed front cover mounting position, in which the front cover is installed and bonded to the diaphragm, and the height of the front cover mounting position is greater than or equal to the height of the front cover after installation.

[0024] Furthermore, the edge of the diaphragm includes a first flat segment extending outward, a vertical segment extending vertically upward from the edge of the first flat segment, and a second flat segment extending outward or inward from the edge of the vertical segment. A first adhesive groove is provided on the base corresponding to the lower edge of the first flat segment, and adhesive is filled in the first adhesive groove. The front cover is bonded to the upper side of the first flat segment by the front cover mounting position. A second adhesive groove is formed between the outer edge of the front cover and the edge of the front cover mounting position to accommodate the vertical segment and the second flat segment, and adhesive is filled in the second adhesive groove.

[0025] Furthermore, a sealing groove is provided on the outer peripheral surface of the upper side of the base frame. The sealing groove includes at least one O-ring, and an O-ring is fitted on the O-ring or a sealing ring is injected into the sealing groove.

[0026] Furthermore, the width of the edge washer is smaller than the width of the edge magnet to form a blank area on the upper side of the edge magnet. The base frame forms a third glue groove lower than the edge washer in the corresponding blank area. A glue injection port is formed in the middle of the third glue groove, and glue is injected to bond the edge magnet and the base frame.

[0027] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0028] 1. This invention first adheres the side magnet to the side washer and the main magnet to the U-cup, and then magnetizes it. On the one hand, this avoids the side magnet from shifting due to the attraction between the side magnet and the main magnet, allowing magnetization to be performed without waiting for complete curing. On the other hand, during installation, the side magnet can be installed first, followed by the voice coil and FPC, and finally the U-cup and the main magnet. In this way, the FPC is less likely to interfere with the side magnet, and there is also more space to complete the welding of the FPC and the voice coil.

[0029] 2. The present invention has a clearance groove on the lower side of the base frame for the process pins of the FPC, so as to avoid interference between the base frame and the FPC and thus cause misalignment of the voice coil. At the same time, a flow-blocking foot is provided on the edge of the U cup to block the airflow of the clearance groove.

[0030] 3. The present invention optimizes the diaphragm by achieving a double seal on the diaphragm through the first and second adhesive grooves, thereby improving the waterproof performance;

[0031] 4. In this invention, the front cover and U-cup are both embedded in the base frame. At the same time, the positioning feet formed by the edge washer have a limiting effect on the edge magnet, which together improves the speaker's drop resistance.

[0032] 5. The present invention embeds the front cover, thereby setting the position of the sealing groove that should be located on the front cover on the base frame, so that the sealing groove has a large design space, and O-rings can be flexibly installed or sealing rings can be injection molded on the sealing groove according to waterproof level requirements and cost considerations. Attached Figure Description

[0033] Figure 1 This is a schematic flowchart of the preparation method of the present invention;

[0034] Figure 2 This is a schematic diagram of the process for installing the FPC according to the present invention;

[0035] Figure 3 This is an isometric view of the structure of the present invention;

[0036] Figure 4 This is a disassembly diagram of the present invention;

[0037] Figure 5 This is a top view of the present invention;

[0038] Figure 6 for Figure 5 Sectional view at point AA;

[0039] Figure 7 for Figure 5 Sectional view at point BB;

[0040] Figure 8 This is a schematic diagram of the present invention after the side magnets are installed;

[0041] Figure 9 This is a schematic diagram of the present invention after the voice coil is installed;

[0042] Figure 10 This is a schematic diagram of the present invention after the FPC is installed;

[0043] Figure 11 This is a schematic diagram of the U-cup after installation of the present invention;

[0044] Figure 12 This is a schematic diagram of the bottom of the base frame of the present invention;

[0045] Figure 13 This is a schematic diagram of the main magnetic circuit of the present invention;

[0046] Figure 14This is a schematic diagram of the base frame of the present invention.

[0047] Figure label:

[0048] 100. Base frame; 110. Relief groove; 120. Front cover mounting position; 130. First glue groove; 140. Second glue groove; 150. Sealing groove; 151. O-ring; 160. Sealing ring; 170. Third glue groove; 171. Glue inlet; 180. Fourth glue groove;

[0049] 200. Side magnetic circuit; 210. Side washer; 211. Positioning folding foot; 220. Side magnet; 221. Positioning groove;

[0050] 300. Voice coil; 310. Positioning mark;

[0051] 400. Diaphragm; 410. Membrane frame; 411. First horizontal section; 412. Vertical section; 413. Second horizontal section; 420. Membrane core;

[0052] 500, FPC; 510, Process pin;

[0053] 600. Main magnetic circuit; 610. U-cup; 611. Baffle foot; 612. Mounting section; 620. Main magnet; 630. Washer; 631. Cross groove;

[0054] 700, front cover. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example

[0056] Please refer to Figure 1 As shown, a method for manufacturing a loudspeaker includes:

[0057] The side magnetic circuit is assembled and installed by designing the side washer as a ring and embedding it into the base frame from the lower side. Two downward positioning feet are set on each side of the long axis of the side washer. Positioning grooves corresponding to the positioning feet are designed on both sides of the inner side of the side magnet. The side magnet is positioned and glued to the side washer to form the side magnetic circuit.

[0058] Assemble the main magnetic circuit by positioning and bonding the main magnet on the U-cup, and then positioning and bonding the washer on the main magnet to form the main magnetic circuit.

[0059] Magnetization: Magnetize the adjacent magnetic circuit and the main magnetic circuit.

[0060] For voice coil and PFC installation, the voice coil with the diaphragm installed is fixed in the base frame from the upper side. Positioning marks are provided at the connection position of the straight segment and the arc segment on the long axis side of the voice coil. The distance between the outer or inner side of the two positioning feet on the long axis side of the washer is equal to the length of the straight segment on the long axis side of the voice coil and corresponds one-to-one with the positioning marks. The voice coil is positioned and checked at three points by the positioning marks and the outer or inner side of the positioning feet. After the voice coil position is checked and found to be correct, the FPC is implanted on the lower side of the base frame and connected to the voice coil.

[0061] For main magnetic circuit installation, the U-cup is embedded into the base frame from the bottom side.

[0062] Thus, this invention, by first attaching the side magnet to the side washer and the main magnet to the U-cup, and then magnetizing, avoids displacement of the side magnet due to the attraction between the side magnet and the main magnet, allowing magnetization to be performed without waiting for complete curing, saving labor time. Furthermore, during installation, the side magnet can be installed first, followed by the voice coil and FPC, and finally the U-cup and main magnet. This reduces the likelihood of interference between the FPC and the side magnet, and provides more space for soldering the FPC to the voice coil, reducing the difficulty of the operation.

[0063] Because the main magnet is installed from bottom to top, the positional relationship between the main magnet and the voice coil cannot be visually determined, resulting in a blind installation. Simultaneously, the voice coil is fixed to the diaphragm, which is flexible. During the connection process, factors such as the diaphragm's molding precision and the assembly precision of both can easily lead to deviations in the voice coil's installation position. After the voice coil with the diaphragm installed is installed, its position is checked to ensure accuracy before proceeding with subsequent installations. This prevents positional interference or misalignment between the main magnet and the voice coil during assembly, which could affect sound quality. In this embodiment, the distance between the outer surfaces of the two positioning feet on the long axis side of the washer is equal to the length of the straight segment on the long axis side of the voice coil. Each of the four outer surfaces corresponds to one of the four positioning marks. After the voice coil is installed, the positional relationship between the three sets of outer surfaces and the positioning marks is visually identified. This involves determining whether the corresponding positioning marks and outer surfaces are on the same extended line and whether the spacing between them is uniform, thereby determining whether the voice coil's position deviates in various directions. By using a high-precision edge washer to inspect the voice coil mounting position, the accuracy of the voice coil mounting position can be guaranteed to the maximum extent without increasing the inspection tooling, thereby reducing inspection costs.

[0064] Please refer to Figure 2As shown, in a preferred embodiment, the present invention forms a clearance groove on the lower side of the base corresponding to the position of the FPC, allowing the process pins of the FPC to extend. This facilitates the connection between the FPC and the voice coil on the base and reduces the risk of voice coil misalignment. After the connection between the FPC and the voice coil is completed, the process pins are trimmed. Preferably, when installing the U-cup, the edge of the U-cup is provided with a baffle foot corresponding to the clearance groove to cover the clearance groove and reduce airflow leakage. When the front and rear of the speaker diaphragm 400 generate sound waves of opposite phase, air leakage will cause the two to cancel each other out, especially resulting in muddy and weak bass. Furthermore, air leakage will allow sound wave energy to escape from the leakage point, requiring the diaphragm 400 to vibrate more significantly to achieve the same volume, increasing power consumption and potentially damaging the diaphragm 400 due to excessive vibration. Providing a baffle foot 611 to cover the clearance groove 110 improves the solidity of the bass and reduces power consumption.

[0065] In a preferred embodiment, the diaphragm edge is designed to include a first flat segment extending outward, a vertical segment extending vertically upward from the edge of the first flat segment, and a second flat segment extending outward or inward from the edge of the vertical segment. Thus, a first adhesive groove is designed on the base corresponding to the lower edge of the first flat segment. Adhesive is injected into the first adhesive groove to connect the lower side of the first flat segment to the first adhesive groove, achieving the first seal.

[0066] Meanwhile, a front cover mounting position is provided on the upper side of the base frame. The front cover is adhered to the upper side of the first flat section via the front cover mounting position. A second adhesive groove is formed between the outer edge of the front cover and the edge of the front cover mounting position to accommodate the vertical section and the second flat section. Thus, by injecting adhesive into the second adhesive groove, the second flat section can be adhered, achieving a second seal before the first seal, further preventing water from entering the interior of the base frame along the lower side of the diaphragm. At the same time, the second seal strengthens the connection between the front cover and the base, making the front cover less likely to fall off.

[0067] In a preferred embodiment, a sealing groove is designed on the outer peripheral surface of the upper side of the base frame, and the sealing groove includes at least one O-ring. Depending on the waterproofing level requirements, an O-ring is fitted onto the O-ring or a sealing ring is injection molded onto the sealing groove. Thus, by embedding the front cover, the present invention places the sealing groove, which would normally be located on the front cover, on the base frame, providing greater design space for the sealing groove. Larger sealing grooves can be designed to meet higher waterproofing requirements. This allows for flexible installation of O-rings or injection molding of sealing rings onto the sealing groove, depending on waterproofing level requirements and cost considerations.

[0068] Please refer to Figure 3-14 As shown, the present invention also provides a loudspeaker, which is manufactured by the aforementioned method, and aims to reduce the assembly difficulty and save time of the loudspeaker and improve its drop resistance. It includes a base frame 100, a side magnetic circuit 200, a voice coil 300, a diaphragm 400, an FPC 500 and a main magnetic circuit 600.

[0069] The side magnetic circuit 200 includes a side washer 210 and a side magnet 220. The side washer 210 is annular and is embedded in the base frame 100 from the lower side. Two downward positioning feet 211 are provided on each side of the long axis of the side washer 210. The inner sides of the side magnet 220 are provided with positioning grooves 221 corresponding to the positioning feet. The side magnet 220 is positioned and adhered to the side washer 210.

[0070] After the voice coil 300 is connected to the diaphragm 400, it is fixed in the base 100 by the upper side of the base 100, wherein the voice coil 300 extends into the base 100 and is located in the area defined by the side magnet 220. In a preferred embodiment, the voice coil 300 is made of copper-clad aluminum wire, which ensures conductivity close to that of pure copper wire while significantly reducing the weight of the voice coil 300. The lighter voice coil 300 has less inertia when moving in a magnetic field, can respond to high-frequency changes in audio signals faster, reduces transient distortion, and makes the high-frequency sound quality clearer and more dynamic. The lightweight design also reduces the load on the diaphragm 400, preventing the diaphragm 400 from being unable to vibrate due to excessive weight of the voice coil 300, which is especially suitable for small-sized speakers, such as headphones and mobile phone speakers.

[0071] The FPC500 is embedded in the base 100 from the lower side and connected to the voice coil 300.

[0072] The main magnetic circuit 600 includes a U-cup 610, a main magnet 620 bonded to the upper side of the U-cup 610, and a washer 630 bonded to the upper side of the main magnet 620. The U-cup 610 is embedded in the base frame 100 from the lower side. After installation, the main magnet 620 is located in the voice coil 300.

[0073] In a preferred embodiment, a relief groove 110 is formed on the lower side of the base frame 100 corresponding to the position of the FPC 500, for the process pins 510 of the FPC 500 to extend out. A flow-blocking fold 611 corresponding to the relief groove 110 is provided on the edge of the U cup 610 to cover the relief groove 110.

[0074] In a preferred embodiment, the upper side of the base frame 100 is provided with a recessed front cover mounting position 120. The front cover 700 is installed in the front cover mounting position 120 and bonded to the diaphragm 400. The height of the front cover mounting position 120 is greater than or equal to the height of the front cover after installation. In this way, the front cover 700 is completely embedded in the base frame 100. When the product is dropped, the base frame 100 bears the main impact force, making it less likely for the front cover 700 to fall off.

[0075] In a preferred embodiment, the edge of the diaphragm 400 includes a first flat segment 411 extending outward, a vertical segment 412 extending vertically upward from the edge of the first flat segment 411, and a second flat segment 413 extending outward from the edge of the vertical segment 412. A first adhesive groove 130 is provided on the base frame 100 corresponding to the lower edge of the first flat segment 411, and adhesive is injected into the first adhesive groove 130. The front cover 700 is bonded to the upper side of the first flat segment 411 by the front cover mounting position 120. A second adhesive groove 140 is formed between the outer edge of the front cover 700 and the edge of the front cover mounting position 120 to accommodate the vertical segment 412 and the second flat segment 413, and adhesive is injected into the second adhesive groove 140. Thus, the first adhesive groove 130 and the second adhesive groove 140 achieve a double seal, meeting high-level waterproofing requirements. Simultaneously, the second adhesive groove 140 strengthens the connection between the base frame 100 and the front cover 700.

[0076] In a preferred embodiment, a sealing groove 150 is provided on the outer peripheral surface of the upper side of the base frame 100. The sealing groove 150 includes at least one O-ring 151, on which an O-ring is fitted or a sealing ring 160 is injection molded. Thus, by embedding the front cover 700 within the base frame 100, the present invention places the sealing groove 150, which would otherwise be located on the front cover 700, in the position of the base frame 100. This provides greater design space for the sealing groove 150, allowing for the design of larger sealing grooves to meet higher waterproofing requirements. This enables flexible installation of O-rings or injection molding of sealing rings 160 into the sealing groove 150 based on waterproofing level requirements and cost considerations.

[0077] In a preferred embodiment, the width of the edge washer 210 is smaller than the width of the edge magnet 220 to form a blank area on the upper side of the edge magnet 220. The base frame 100 forms a third adhesive groove 170 corresponding to the blank area, lower than the edge washer 210. An adhesive injection port 171 is formed in the middle of the third adhesive groove 170 for adhesive injection and bonding of the edge magnet 220 and the base frame 100. In this way, a connection is also achieved between the edge magnet 220 and the base frame 100, further improving the stability of the edge magnetic circuit 200.

[0078] In a more preferred embodiment, when installing the U-cup 610, adhesive can be applied to the underside of the side magnet 220 to bond the U-cup 610 to the side magnet 220. Furthermore, the base frame 100 has fourth adhesive grooves 180 at both ends along its long axis. The U-cup 610 has upwardly extending mounting sections 612 at both ends along its long axis. The mounting sections 612 abut against the fourth adhesive grooves 180, which are filled with adhesive to bond the mounting sections 612. This achieves connection and positioning of the U-cup 610 in four directions, making it less likely for the U-cup 610 to fall off.

[0079] In a preferred embodiment, the diaphragm 400 includes a diaphragm frame 410 and a diaphragm core 420. The diaphragm frame 410 serves as a supporting frame structure and can be made of a material with relatively high rigidity, such as PET or PP. The diaphragm core 420 focuses on vibration function and can be made of lightweight, highly elastic materials, such as silk, aluminum-magnesium alloy, or bio-fiber. Since it does not need to bear the pressure of support and fixation, the diaphragm core 420 can deform more freely, improving the delicacy of the sound quality.

[0080] In a preferred embodiment, a cross groove 631 is provided above the washer 630 to balance the internal air pressure of the magnetic circuit and prevent air pressure changes from interfering with the vibration of the voice coil 300 and the sound quality. Specifically, when the voice coil 300 vibrates at high frequency within the magnetic gap, it compresses the air in the magnetic circuit. Without an exhaust groove, the air cannot circulate quickly, forming a resistance similar to an air cushion, hindering the normal movement of the voice coil 300, resulting in sound quality distortion or deterioration of dynamic response, especially in the low-frequency range.

[0081] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for manufacturing a loudspeaker, characterized in that, include: The edge washer is designed as a ring and is embedded in the base frame from the lower side. Two downward positioning feet are set on each side of the long axis of the edge washer. Positioning grooves corresponding to the positioning feet are designed on both sides of the inner side of the edge magnet. The edge magnet is positioned and glued to the edge washer to form the edge magnetic circuit. Position and attach the main magnet to the U-cup, and position and attach the washer to the main magnet to form the main magnetic circuit; Magnetize the adjacent magnetic circuit and the main magnetic circuit; The voice coil with the diaphragm installed is fixed in the base frame from the top side. The connection position of the straight segment and the arc segment on the long axis side of the voice coil is marked. The distance between the outer or inner side of the two positioning feet on the long axis side of the washer is equal to the length of the straight segment on the long axis side of the voice coil and corresponds one-to-one with the positioning marks. The voice coil is positioned by three points through the positioning marks and the outer or inner side of the positioning feet. After the voice coil position is correct, the FPC is implanted on the lower side of the base frame and connected to the voice coil. The U cup is embedded in the base frame from the lower side of the base frame. The edge design of the diaphragm includes a first flat segment extending outward, a vertical segment extending vertically upward from the edge of the first flat segment, and a second flat segment extending outward from the edge of the vertical segment; A first glue groove is designed on the base frame at the lower edge of the first flat section. Glue is injected into the first glue groove to connect the lower side of the first flat section to the first glue groove. The upper side of the base frame is provided with a front cover mounting position. The front cover is glued to the upper side of the first flat section through the front cover mounting position. A second glue groove is formed between the outer edge of the front cover and the edge of the front cover mounting position to accommodate the vertical section and the second flat section. Glue is injected into the second glue groove.

2. The preparation method according to claim 1, characterized in that: A clearance groove is formed on the lower side of the base frame corresponding to the position of the FPC to allow the process pins of the FPC to extend. After completing the connection between the FPC and the voice coil, the process pins are cut. A flow-blocking foot corresponding to the relief groove is provided on the edge of the U-cup to cover the relief groove.

3. The preparation method according to claim 1, characterized in that: A sealing groove is designed on the outer circumference of the upper side of the base frame, and the sealing groove includes at least one O-ring groove; Depending on the waterproof rating requirements, an O-ring can be fitted onto the O-groove or a sealing ring can be injection molded onto the sealing groove.

4. A loudspeaker, manufactured by the preparation method according to any one of claims 1-3, characterized in that, include: Base frame; The side magnetic circuit includes a side washer and a side magnet. The side washer is ring-shaped and is embedded in the base frame from the lower side. Two downward positioning feet are provided on each side of the long axis of the side washer. Positioning grooves corresponding to the positioning feet are provided on both sides of the inner side of the side magnet. The side magnet is positioned and adhered to the side washer. The voice coil and diaphragm are connected and then fixed in the base frame by the upper side of the base frame; FPC is implanted into the base frame from the lower side and connected to the voice coil; The main magnetic circuit includes a U-cup, a main magnet bonded to the upper side of the U-cup, and a washer bonded to the upper side of the main magnet. The U-cup is embedded in the base frame from the lower side of the base frame. The edge of the diaphragm includes a first flat segment extending outward, a vertical segment extending vertically upward from the edge of the first flat segment, and a second flat segment extending outward from the edge of the vertical segment. A first adhesive groove is provided on the base corresponding to the lower edge of the first flat segment, and adhesive is filled in the first adhesive groove. The front cover is glued to the upper side of the first flat segment by the front cover mounting position. A second adhesive groove is formed between the outer edge of the front cover and the edge of the front cover mounting position to accommodate the vertical segment and the second flat segment, and adhesive is filled in the second adhesive groove.

5. The loudspeaker as described in claim 4, characterized in that: The lower side of the base frame forms a relief groove corresponding to the position of the FPC, allowing the process pins of the FPC to extend. A baffle foot corresponding to the relief groove is provided on the edge of the U cup to cover the relief groove.

6. The loudspeaker as claimed in claim 4, characterized in that: The upper side of the base frame is provided with a recessed front cover mounting position. The front cover is installed in the front cover mounting position and bonded to the diaphragm. The height of the front cover mounting position is greater than or equal to the height of the front cover after installation.

7. The loudspeaker as claimed in claim 4, characterized in that: The upper outer circumferential surface of the base frame is provided with a sealing groove, which includes at least one O-ring groove. An O-ring is fitted on the O-ring groove or a sealing ring is injected into the sealing groove.

8. The loudspeaker as claimed in claim 4, characterized in that: The width of the edge washer is smaller than the width of the edge magnet to form a blank area on the upper side of the edge magnet. The base frame forms a third glue groove lower than the edge washer in the corresponding blank area. A glue injection port is formed in the middle of the third glue groove. Glue is injected to bond the edge magnet and the base frame.

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