Dustproof loudspeaker sound basin

The design of the snap-fit ​​and fixing device simplifies the installation and disassembly process of the dustproof speaker cone, solves the problem of difficult maintenance, and improves production efficiency and sound stability.

CN223912579UActive Publication Date: 2026-02-13嵊州市乐佳电子科技有限公司
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Patent Information

Application Number
CN202520498792.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-20
Publication Date
2026-02-13
Estimated Expiration
2035-03-20

AI Technical Summary

Technical Problem

Existing dustproof speaker cones are difficult to disassemble during maintenance, which may result in scratches or damage to parts. Furthermore, the installation and disassembly process consumes a lot of effort, affecting production efficiency and costs.

Method used

The device employs a snap-fit ​​mechanism and a fixing mechanism. The snap-fit ​​mechanism secures the paper tray initially through the engagement of the slot and the block. The fixing mechanism secures it again through mechanical transmission via rotating the handle, worm gear, turbine, lead screw, and other components, simplifying the installation and disassembly process.

Benefits of technology

It improves speaker assembly efficiency, reduces labor costs, ensures that the paper cone does not loosen or shift during vibration, and enhances the stability and purity of the sound.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of loudspeaker sound cone fixation, and discloses a dustproof loudspeaker sound cone, which comprises T-shaped iron, an annular magnet, a washer gasket, a cone frame and a cone, the T-shaped iron is arranged in a T shape, the annular magnet is sleeved at the axis of the T-shaped iron, the washer gasket is sleeved at the position of the top of the annular magnet corresponding to the axis of the T-shaped iron, and the cone frame is arranged on the cone frame. The top of the washer gasket is fixedly connected with the cone frame through a screw, the cone frame is arranged in a cone shape, the cone frame is internally provided with the paper cone, the paper cone is fixed for the first time through a clamping device, when the paper cone is installed, a clamping groove in the top of the paper cone and a clamping block on the auxiliary ring are aligned and pressed, initial connection can be completed, and the installation mode is simple and rapid in operation and high in efficiency. Complex tools and steps are not needed, the production and assembly efficiency is greatly improved, and the labor cost is reduced.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a loudspeaker sound basin fixing technical field, concretely is a dustproof loudspeaker sound basin. BACKGROUND

[0002] The dustproof loudspeaker sound basin is a kind of loudspeaker assembly that is improved on the basis of traditional loudspeaker sound basin, and it has the dustproof function, it not only has the function of ordinary sound basin to push air to sound, but also can effectively block dust and other impurities into the inside of loudspeaker, protect the key components of loudspeaker, prolong service life, improve sound quality stability.

[0003] According to Chinese patent publication CN202221904721.1, in the application, the inside of the sound basin body on the device is provided with support ring, support shaft and sound insulation ring and other structures, so that the device inside the sound basin body can be supported and not easy to fall off, and when these structures are made, soft material such as rubber is selected, which has insulation effect and does not interfere with the magnetic field of the device, so that the sound effect is more smooth, and the loudspeaker is not easy to fail during use, thereby improving the service life of the loudspeaker.

[0004] Although the inside of the sound basin body in the application is provided with support ring, support shaft and sound insulation ring and other structures, which can effectively handle the problem of easy falling off, but during maintenance, due to the use of glue to connect the dustproof loudspeaker sound basin, a lot of energy is consumed during disassembly, and it may also cause scratches or damage to the sound basin, dust cover or other surrounding parts due to improper force, so we propose a dustproof loudspeaker sound basin. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a dustproof loudspeaker sound basin, which solves the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a dustproof loudspeaker sound basin, comprising a T iron, a ring-shaped magnet, a huasi gasket, a basin frame and a paper basin, the T iron is arranged in the shape of "T", the T iron is provided with a ring-shaped magnet at the axis, the top of the ring-shaped magnet is provided with a huasi gasket at the corresponding position of the axis of the T iron, the top of the huasi gasket is fixedly connected with the basin frame through screws, and the basin frame is arranged in the shape of a cone, the inside of the basin frame is provided with a paper basin, and the dustproof loudspeaker sound basin further comprises:

[0007] The clamping device is arranged at the top of the basin frame and is used for fixing the paper basin for the first time.

[0008] The fixing device is arranged at the top of the basin frame and is used for fixing the paper basin again.

[0009] Preferably, the top of the basin frame is fixedly connected with an auxiliary ring, and the inner wall of the auxiliary ring is fixedly connected with four groups of clamping blocks at the top of the basin frame.

[0010] Preferably, the clamping device comprises clamping slots, and the top of the paper basin is provided with four groups of clamping slots.

[0011] Preferably, the fixing device comprises pressing blocks, movable slots, connecting rods and nuts, the inner wall of the auxiliary ring is provided with four groups of movable slots, the inner wall of each of the four groups of movable slots is movably connected with a connecting rod, one end of the connecting rod is fixedly connected with a pressing block, the bottom of the pressing block is pressed together with the top of the paper basin, and the other end of the connecting rod is fixedly connected with a nut.

[0012] Preferably, the inner wall of the nut is sleeved with a lead screw, the outer side of the lead screw is threadedly connected with a turbine, and the outer side of the turbine is engaged with a worm.

[0013] Preferably, one end of the worm penetrates through the outer side of the auxiliary ring, and the one end of the worm is fixedly connected with a rotating handle.

[0014] Compared with the prior art, the dustproof loudspeaker sound basin has the following beneficial effects:

[0015] 1. The dustproof loudspeaker sound basin adopts a clamping device for primary fixation, and when the paper basin is installed, the clamping slots on the top of the paper basin are aligned with the clamping blocks on the auxiliary ring and pressed, so that the preliminary connection is completed. This installation mode is simple and fast to operate, and does not require complex tools and steps, thereby greatly improving the production and assembly efficiency and reducing the labor cost.

[0016] 2. The dustproof loudspeaker sound basin is fixed again by the fixing device through cooperation of the rotating handle, the worm, the turbine, the lead screw and other components. This mechanical transmission fixing mode not only can provide sufficient pressure to tightly connect the paper basin and the basin frame, but also can be adjusted as required to ensure the reliability of fixation, and meanwhile, if the paper basin needs to be disassembled during maintenance, the handle can be easily rotated in reverse to release the fixation, so that the paper basin or other components can be conveniently inspected and replaced.

[0017] 3. The dustproof loudspeaker sound basin is firmly installed on the basin frame by the clamping device and the fixing device, so that the loosening or displacement of the paper basin during vibration and sound production is prevented. If the paper basin is loosened, it may collide with other components to produce noise, or the vibration is unstable to affect the sound quality. The double-fixing design of the device ensures the stability of the vibration of the paper basin, avoids the occurrence of abnormal sound, and further improves the purity and stability of the sound. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the utility model;

[0019] Figure 2 It is the overall structure of the utility model overhead schematic diagram;

[0020] Figure 3 It is the overall structure of the utility model split overhead schematic diagram;

[0021] Figure 4 It is Figure 3 The partial enlarged schematic view of A in

[0022] Figure 5 It is the fixed structure of the utility model cut view enlarged schematic diagram.

[0023] In the figure: 1, T iron; 2, annular magnet; 3, Hua Si gasket; 4, basin frame; 5, paper basin; 6, briquetting; 7, rotating handle; 8, clamping groove; 9, clamping block; 10, worm; 11, movable slot; 12, screw rod; 13, connecting rod; 14, turbine; 15, nut; 16, auxiliary ring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0025] Please refer to Figures 1-5 A dustproof horn sound basin, including T iron 1, annular magnet 2, Hua Si gasket 3, basin frame 4 and paper basin 5, T iron 1 is arranged in the shape of "T", and the axial center of T iron 1 is sleeved with annular magnet 2, the top of annular magnet 2 is sleeved with Hua Si gasket 3 at the corresponding position of the axial center of T iron 1, the top of Hua Si gasket 3 is fixedly connected with basin frame 4 through screws, and basin frame 4 is arranged in the shape of a cone, and the inside of basin frame 4 is provided with paper basin 5, further comprising:

[0026] Clamping device, the device is arranged at the top of basin frame 4, for first fixing paper basin 5;

[0027] Fixing device, the device is arranged at the top of basin frame 4, for fixing paper basin 5 again, T iron 1 is arranged in the shape of "T", and the axial center of T iron 1 is sleeved with annular magnet 2, the top of annular magnet 2 is sleeved with Hua Si gasket 3 at the corresponding position, when audio current passes through the voice coil of the horn, the voice coil is an important component of the horn sound, usually located in the magnetic circuit system, the voice coil will be affected by the Ampere force in the magnetic field formed by T iron 1, annular magnet 2 and Hua Si gasket 3 and produce vibration, this vibration will drive the paper basin 5 connected therewith to vibrate, thereby pushing the surrounding air to produce sound, realizing electric - sound conversion.

[0028] Further, the top of the basin frame 4 is fixedly connected with an auxiliary ring 16, and the inner wall of the auxiliary ring 16 is fixedly connected with four sets of clamping blocks 9 of the top of the basin frame 4.

[0029] Further, the clamping device comprises four sets of clamping grooves 8, and the top of the paper basin 5 is provided with four sets of clamping grooves 8, which are clamped together with the four sets of clamping blocks 9. When installing the paper basin 5, place the paper basin 5 inside the basin frame 4, align the clamping grooves 8 on the top of the paper basin 5 with the clamping blocks 9 on the auxiliary ring 16, and then press the paper basin 5 downward. The clamping grooves 8 and the clamping blocks 9 are clamped together. This clamping method realizes the first fixation of the paper basin 5, preliminarily connects the paper basin 5 with the basin frame 4, limits the movement of the paper basin 5 in the horizontal direction, and lays a foundation for further fixation.

[0030] Further, the fixing device comprises a pressing block 6, a movable slot 11, a connecting rod 13 and a nut 15. The inner wall of the auxiliary ring 16 is provided with four sets of movable slots 11, and the inner wall of each set of movable slot 11 is movably connected with a connecting rod 13. One end of the connecting rod 13 is fixedly connected with the pressing block 6, and the bottom of the pressing block 6 is pressed together with the top of the paper basin 5. The other end of the connecting rod 13 is fixedly connected with the nut 15. The movement of the screw rod 12 will drive the nut 15 connected thereto to move. The nut 15 drives the pressing block 6 to move through the connecting rod 13. The pressing block 6 moves towards the paper basin 5, and finally the bottom of the pressing block 6 is pressed together with the top of the paper basin 5. In this way, the paper basin 5 is fixed again, the stability of the connection between the paper basin 5 and the basin frame 4 is enhanced, and the loosening or displacement of the paper basin 5 during vibration and sound production is prevented, ensuring that the loudspeaker can work stably and efficiently. In summary, the device realizes the conversion of electricity to sound through the magnetic circuit system, and firmly installs the paper basin on the basin frame by using the clamping device and the fixing device, ensuring the normal sound production and stable operation of the loudspeaker.

[0031] Further, the inner wall of the nut 15 is sleeved with a screw rod 12, the outer side of the screw rod 12 is threadedly connected with a turbine 14, and the outer side of the turbine 14 is engaged with a worm 10. Since the worm 10 is engaged with the turbine 14, the rotation of the worm 10 will drive the turbine 14 to rotate. The turbine 14 is threadedly connected with the screw rod 12, and the rotation of the turbine 14 will make the screw rod 12 move along the axial direction.

[0032] Further, one end of the worm 10 penetrates through the outer side of the auxiliary ring 16, and the one end of the worm 10 is fixedly connected with a rotating handle 7. When further fixing the paper basin 5 is needed, rotate the rotating handle 7 to drive the worm 10 to rotate.

[0033] Structure description:

[0034] 1、T iron: The T iron is an important basic structure of the dustproof loudspeaker magnetic circuit system, arranged in a "T" shape, and its axis provides a precise installation position for the sleeve annular magnet. Together with the annular magnet and the dust cap gasket, it forms a complete magnetic circuit, providing the necessary magnetic field environment for the loudspeaker voice coil to move in the magnetic field and drive the cone to produce sound, and is a key supporting component for realizing the electric-to-acoustic conversion.

[0035] 2、Annular magnet: The annular magnet is sleeved at the axis of the T iron and is the core component for generating a magnetic field. It works with the T iron and the dust cap gasket to form a stable and uniform magnetic field. When audio current passes through the voice coil, the voice coil is subjected to the action of Ampere force and vibrates in the magnetic field, thereby driving the cone to produce sound. It is an important component of the loudspeaker for realizing the sound conversion function.

[0036] 3、Dust cap gasket: The dust cap gasket is sleeved on the top of the annular magnet and tightly fits the corresponding position of the axis of the T iron. It plays a role in optimizing the distribution of the magnetic circuit, making the magnetic field more concentrated and stable, and helps to improve the efficiency and stability of the voice coil movement in the magnetic field, thereby improving the sound quality of the loudspeaker. At the same time, the top of the dust cap gasket is fixedly connected to the basket by a screw, realizing the stable combination of the magnetic circuit system and the basket.

[0037] 4、Basket: The basket is arranged in a conical shape and is the supporting structure of the entire dustproof loudspeaker cone. It is fixed to the top of the dust cap gasket by a screw, providing a platform for the installation and support of the cone, clamping device, and fixing device. The conical design helps to disperse the stress generated when the cone vibrates, enhances the stability of the structure, and ensures that all components of the loudspeaker can operate stably and cooperatively during the working process.

[0038] 5、Cone: The cone is a key executive component for the loudspeaker to produce sound. It is arranged inside the basket. When the voice coil vibrates in the magnetic field, it will drive the cone to vibrate, thereby pushing the surrounding air to produce sound and realize the electric-to-acoustic conversion. The top of the cone is provided with a clamping groove for cooperation with the clamping device to realize the preliminary connection with the basket.

[0039] 6、Press block: The press block is part of the fixing device and is fixedly connected to one end of the connecting rod. When fixing the cone, the bottom of the press block is pressed together with the top of the cone, tightly fixing the cone on the basket by applying pressure, enhancing the stability of the connection between the cone and the basket, and preventing the cone from loosening or shifting during the vibration and sound production process.

[0040] 7、Rotary handle: The rotary handle is fixedly connected to one end of the worm, and the end of the worm penetrates the outer side of the auxiliary ring. The rotary handle provides a convenient operation interface for the operator. By rotating the handle, the worm can be driven to rotate, thereby driving the turbine, screw rod, and other components to move, realizing the re-fixing or releasing of the cone, and facilitating the installation, disassembly, and maintenance of the cone.

[0041] 8、card slot: card slot is opened in the top of the paper basin, a total of four groups, card slot and the inner wall of the auxiliary ring and the top of the basin frame card block matching, in the installation of paper basin, the card slot and the card block alignment and press, make two card together, realize the first fixed paper basin and basin frame, limit the horizontal movement of paper basin, for the subsequent further fixed foundation.

[0042] 9、card block: card block a total of four groups, fixedly connected to the inner wall of the auxiliary ring and the top of the basin frame, card block and the top of the paper basin card slot shape and size are matched, for with the card slot card, is an important part of the card connection device, through the card connection effect preliminary connection paper basin and basin frame, guarantee the initial stability of paper basin installation.

[0043] 10、worm: one end of the worm is fixedly connected with the rotating handle, the outer side is engaged with the turbine, when the rotating handle is rotated, the worm is rotated with it, using the meshing transmission relationship between the worm and the turbine, the rotary motion is transmitted to the turbine to drive the turbine to rotate, which is the key component for realizing power transmission and motion conversion in the fixing device.

[0044] 11、movable slot: movable slot is opened in the inner wall of the auxiliary ring, a total of four groups, movable slot provides a moving space for the connecting rod, so that the connecting rod can move freely in it. The movement of the connecting rod in the movable slot drives the pressing block to move, thereby realizing the fixing or loosening operation of the paper basin, which is an important structure for ensuring the normal movement of components in the fixing device.

[0045] 12、screw rod: the outer side of the screw rod is threadedly connected with the turbine, and the inner wall is sleeved with a screw. When the turbine is rotated under the drive of the worm, the rotation of the turbine will make the screw rod move along the axial direction due to the threaded connection relationship between the turbine and the screw rod. The movement of the screw rod drives the nut connected thereto to move, and then drives the pressing block connected through the connecting rod to move, thereby realizing the re-fixing of the paper basin, which is the key component for realizing linear motion in the fixing device.

[0046] 13、connecting rod: one end of the connecting rod is fixedly connected with the pressing block, and the other end is fixedly connected with the nut. The connecting rod is movably connected in the movable slot, and functions to connect the pressing block and the nut. The axial movement of the screw rod is transmitted to the pressing block, so that the pressing block can approach or move away from the paper basin with the movement of the screw rod, thereby realizing the fixing and loosening operation of the paper basin.

[0047] 14、turbine: the outer side of the turbine is engaged with the worm, and the inner side is threadedly connected with the screw rod. When the worm is rotated, the turbine is rotated under the drive of the worm. The rotation is converted into the axial movement of the screw rod through the threaded connection between the turbine and the screw rod, which is an important component for realizing motion conversion and force transmission in the fixing device. Through the cooperation with the worm and the screw rod, the re-fixing function of the paper basin is completed.

[0048] 15、Nut: the nut is sleeved at one end of the screw rod, and is fixedly connected with the other end of the connecting rod. When the screw rod moves axially under the driving of the turbine, the nut moves, drives the pressing block to move through the connecting rod, so as to realize the fixing or loosening operation of the paper basin, and is a key connecting component for transmitting the movement and force of the screw rod in the fixing device.

[0049] 16、Auxiliary ring: the auxiliary ring is fixedly connected to the top of the basin frame, the inner wall of the auxiliary ring is provided with a movable groove, which provides space for the movement of the connecting rod. At the same time, the inner wall of the auxiliary ring is fixedly connected with a clamping block at the top of the basin frame, which is used for cooperating with the clamping groove at the top of the paper basin to realize clamping. The auxiliary ring also provides a support and a structure for the worm, which is an important supporting component of the clamping device and the fixing device, and enhances the structural strength and stability of the top of the basin frame.

[0050] Working principle:

[0051] The device mainly comprises a T iron 1, a ring-shaped magnet 2, a Hua Si gasket 3, a basin frame 4, a paper basin 5, and a clamping device and a fixing device for fixing the paper basin 5. The T iron 1, the ring-shaped magnet 2 and the Hua Si gasket 3 constitute a magnetic circuit system to provide a magnetic field for the loudspeaker to sound; the basin frame 4 serves as a support; the paper basin 5 is a key component for sounding; and the clamping device and the fixing device are used to stably mount the paper basin 5 on the basin frame 4.

[0052] Magnetic circuit system;

[0053] The T iron 1 is arranged in a "T" shape, and the ring-shaped magnet 2 is sleeved at the axial center of the T iron 1. The Hua Si gasket 3 is sleeved at the top of the ring-shaped magnet 2. When audio current passes through the voice coil of the loudspeaker, the voice coil is an important component of the loudspeaker for sounding, and is usually located in the magnetic circuit system. At this time, the voice coil will vibrate in the magnetic field formed by the T iron 1, the ring-shaped magnet 2 and the Hua Si gasket 3 under the action of the Ampere force, and this vibration will drive the paper basin 5 connected thereto to vibrate, thereby pushing the surrounding air to produce sound and realize the electric - sound conversion;

[0054] Paper basin installation;

[0055] The auxiliary ring 16 is fixedly connected to the top of the basin frame, four sets of clamping blocks 9 are fixedly connected to the inner wall of the auxiliary ring 16 and the top of the basin frame 4, four sets of clamping grooves 8 are formed in the top of the paper basin 5, when the paper basin 5 is installed, the paper basin 5 is placed in the basin frame 4, the clamping grooves 8 in the top of the paper basin 5 are aligned with the clamping blocks 9 on the auxiliary ring 16, then the paper basin 5 is pressed downward, the clamping grooves 8 and the clamping blocks 9 are clamped together, this clamping mode realizes the first fixation of the paper basin 5, initially connects the paper basin 5 and the basin frame 4, limits the movement of the paper basin 5 in the horizontal direction, and lays a foundation for further fixation, four sets of movable grooves 11 are formed in the inner wall of the auxiliary ring 16, a connecting rod 13 is movably connected in the movable grooves 11, a pressing block 6 is fixedly connected to one end of the connecting rod 13, a nut 15 is fixedly connected to the other end of the connecting rod 13, a lead screw 12 is sleeved on the inner wall of the nut, a worm 14 is threadedly connected to the outer side of the lead screw 12, the worm 14 is engaged with a worm gear 10, one end of the worm gear 10 penetrates through the outer side of the auxiliary ring and is fixedly connected with a rotating handle 7, when the paper basin 5 needs to be further fixed, the rotating handle 7 is rotated to drive the worm gear 10 to rotate, since the worm gear 10 is engaged with the worm 14, the rotation of the worm gear 10 drives the worm 14 to rotate, the worm 14 is threadedly connected with the lead screw 12, the rotation of the worm 14 drives the lead screw 12 to move along the axial direction, the movement of the lead screw 12 drives the nut 15 connected therewith to move, the nut 15 drives the pressing block 6 to move through the connecting rod 13, the pressing block 6 moves toward the paper basin 5, and finally the bottom of the pressing block 6 is pressed together with the top of the paper basin 5, in this way, the paper basin 5 is fixed again, the stability of the connection between the paper basin 5 and the basin frame 4 is enhanced, the loosening or displacement of the paper basin 5 during the vibration and sound production process is prevented, and the loudspeaker can work stably and efficiently, and the device realizes the electric-sound conversion through the magnetic circuit system, and the paper basin is firmly installed on the basin frame through the clamping device and the fixing device, so that the normal sound production and stable operation of the loudspeaker are ensured.

[0056] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, the range of the utility model is defined by the appended claims and their equivalents.

Claims

1. A dustproof speaker cone, comprising a T-shaped iron (1), a ring magnet (2), a washer gasket (3), a frame (4), and a paper cone (5), wherein the T-shaped iron (1) is T-shaped, the ring magnet (2) is sleeved at the axis of the T-shaped iron (1), the washer gasket (3) is sleeved at the top of the ring magnet (2) corresponding to the axis of the T-shaped iron (1), the top of the washer gasket (3) is fixedly connected to the frame (4) by screws, and the frame (4) is conical, wherein the paper cone (5) is disposed inside the frame (4), characterized in that: Also include: The device is arranged in the top of the basin frame (4), for the first time fixed paper basin (5); The device is arranged in the top of the basin frame (4), for the second time fixed paper basin (5).

2. The dustproof cone speaker cone according to claim 1, wherein: The top of the basin frame (4) is fixedly connected with auxiliary ring (16), the inner wall of the auxiliary ring (16) is fixedly connected with four groups of clamping block (9) in the top of the basin frame (4).

3. The dustproof cone speaker cone according to claim 2, wherein: The clamping device includes a clamping groove (8), the top of the paper basin (5) is provided with four groups of clamping groove (8), four groups of clamping groove (8) and four groups of clamping block (9) are clamped together.

4. The dustproof cone speaker cone of claim 2, wherein: The fixing device includes a pressing block (6), a movable slot (11), a connecting rod (13) and a nut (15), the inner wall of the auxiliary ring (16) is provided with four groups of movable slot (11), the inner wall of four groups of movable slot (11) is movably connected with connecting rod (13), one end of the connecting rod (13) is fixedly connected with the pressing block (6), the bottom of the pressing block (6) is pressed together with the top of the paper basin (5), the other end of the connecting rod (13) is fixedly connected with the nut (15).

5. The dustproof cone speaker cone according to claim 4, wherein: The inner wall of the nut (15) is sleeved with a lead screw (12), the outer side of the lead screw (12) is screw connected with a turbine (14), the outer side of the turbine (14) is engaged with a worm (10).

6. The dustproof cone speaker cone according to claim 5, wherein: One end of the worm (10) penetrates through the outer side of the auxiliary ring (16), and one end of the worm (10) is fixedly connected with a rotating handle (7).

Citation Information

Patent Citations

  • Metal sound cone for loudspeaker

    CN217904650U