Electrodynamic loudspeaker

Abstract

The invention discloses an electrodynamic loudspeaker, and belongs to the technical field of loudspeakers, the electrodynamic loudspeaker comprises a basin stand installed on a broadcasting device and a skeleton installed on the basin stand, the skeleton is sleeved with a voice coil, a damper is installed between the basin stand and the skeleton, a T-shaped iron is installed below the skeleton in an embedded manner, and the T-shaped iron is connected with the voice coil. The T-shaped iron is sleeved with magnetic steel, a washer is installed between the magnetic steel and the basin frame, and the washer is sleeved with the voice coil. A paper cone is arranged on the framework, and a dustproof cover is embedded in the center of the paper cone; a lower heat dissipation channel and an upper heat dissipation channel are formed in the framework, the diameter of the upper heat dissipation channel is smaller than that of the lower heat dissipation channel, and a heat dissipation mechanism communicated with the upper heat dissipation channel to assist heat dissipation is arranged on the dustproof cover; through the heat dissipation mechanism, heat in the loudspeaker can be effectively assisted to be discharged outwards, the rigidity of the framework in a high-temperature state can be enhanced, secondary resonance caused by deformation of the framework is avoided, and the tone quality effect of the loudspeaker is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of loudspeakers, in particular to an electric loudspeaker. BACKGROUND

[0002] The electric loudspeaker converts electrical signals into mechanical vibrations through electromagnetic induction, and then radiates sound waves. It has the characteristics of relatively simple structure, wide frequency response range, moderate cost, strong power carrying capacity, etc. The voice coil is the main heat generating structure in the electric loudspeaker. Since the voice coil is usually tightly wound by fine varnish-coated wire and is in a closed space inside the magnetic circuit system, the heat dissipation condition is poor, and heat is easily accumulated, which will affect the application of the loudspeaker.

[0003] A patent with publication number CN106878888B discloses an induced electric loudspeaker. An induction voice coil is installed in the middle of the magnetic gap formed between the magnetic guide plates. The induction voice coil is a multi-turn coil wound on the voice coil skeleton and connected at the beginning and end to form a closed loop. The voice coil skeleton and the diaphragm are bonded together with the inner edge of the centering support piece. The outer edge of the centering support piece is installed on the upper end of the magnetic guide plate. An excitation coil is wound on the center magnetic column. The signal feed line passes through the hole of the lower magnetic guide plate and is connected with the excitation coil. The magnetic steel, the lower magnetic guide plate and the upper magnetic guide plate are high-permeability and high-resistivity magnetic conductors. The loudspeaker can realize high-fidelity for medium-sized speakers and solve the heat dissipation problem to improve the power tolerance for high-power loudspeakers.

[0004] A patent with publication number CN114040306B discloses an active heat dissipation type loudspeaker. The loudspeaker includes a loudspeaker shell, a magnetic circuit assembly arranged in the loudspeaker shell, a flow channel assembly arranged in the loudspeaker shell and communicating with the outside, and a vibration assembly arranged in the flow channel assembly and transmissionally connected with the magnetic circuit assembly. The vibration assembly makes the air in the flow channel assembly unidirectionally flow out to the outside through vibration. The active heat dissipation type loudspeaker produces airflow only unidirectionally flowing out to the outside, so that the air in the deep part of the loudspeaker can also be discharged to the outside, and heat accumulation is not easy.

[0005] For example, patent CN212544047U discloses a speaker heat dissipation structure and speaker. The heat dissipation structure includes a U-shaped iron with multiple slots formed on its sidewalls; a magnetic component with multiple gaps spaced along its circumference, each gap facing one of the slots; and a voice coil located at the center of the magnetic component, with part of its wall facing the slots and gaps. The speaker heat dissipation structure, by making the U-shaped iron and magnetic component open, allows the heat generated by the voice coil to be dissipated to the outside of the speaker in a timely manner, avoiding heat concentration inside the magnetic component, which could damage the insulation layer of the voice coil and cause short circuits, thus improving the speaker's performance. However, some existing speakers have relatively sealed interiors, which limits the heat dissipation effect on the voice coil. The heat conduction around the voice coil cools down slowly and is easily absorbed by the metal components or diaphragm inside the speaker, causing heat to accumulate inside. Under the influence of heat, some components inside the speaker are prone to deformation and reduced rigidity. For example, a reduced rigidity frame can generate secondary resonance during vibration, which superimposes with the main vibration of the diaphragm to form segmented vibration, introducing additional noise and reducing the sound quality.

[0006] To address the aforementioned issues, there is an urgent need for innovative designs based on existing electrodynamic loudspeakers. Summary of the Invention

[0007] The purpose of this invention is to provide an electrodynamic loudspeaker to solve the problems mentioned in the background art, such as the relatively sealed interior of some existing loudspeakers, which have limited heat dissipation effect on the voice coil, slow heat conduction and cooling speed around the voice coil, and easy absorption by the metal parts or diaphragm inside the loudspeaker, resulting in heat accumulation inside. Under the action of heat, some components inside the loudspeaker are prone to deformation and reduced rigidity. For example, the reduced rigidity of the frame generates secondary resonance when vibrating, which superimposes with the main vibration of the diaphragm to form segmented vibration, introducing additional noise and reducing the sound quality.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an electric loudspeaker, comprising a frame mounted on a broadcasting device and a skeleton mounted on the frame, a voice coil sleeved on the outside of the skeleton, a spring between the frame and the skeleton, a T-shaped iron fitted below the skeleton, a magnet sleeved on the outside of the T-shaped iron, a washer between the magnet and the frame, and the washer being sleeved on the outside of the voice coil; a paper cone mounted on the skeleton, a dust cover fitted at the center of the paper cone; a lower heat dissipation channel and an upper heat dissipation channel are provided in the skeleton, the diameter of the upper heat dissipation channel being smaller than the diameter of the lower heat dissipation channel, and a heat dissipation mechanism communicating with the upper heat dissipation channel to assist in heat dissipation is provided on the dust cover.

[0009] Preferably, the heat dissipation mechanism comprises a dustproof cylinder fixedly installed at the lower end surface of the dustproof cover, a plurality of dustproof columns are fixedly installed on the inner wall of the dustproof cylinder at equal angles along the axial direction, and oblique grooves are formed in the dustproof columns and the dustproof cylinder; the oblique grooves are in through connection with the upper heat dissipation channel in the framework.

[0010] Preferably, the heat dissipation mechanism further comprises a conical heat dissipation hole formed at the central position of the dustproof cover, a conical block is embeddedly installed in the conical heat dissipation hole, and a stand column is fixedly connected to the lower end surface of the conical block and is in through sliding connection with the bottom surface of the dustproof cylinder.

[0011] Preferably, a piston disc is fixedly installed at the lower end surface of the stand column, the piston disc is movably arranged in the lower heat dissipation channel, and the piston disc is in abutting contact with the inner wall of the upper heat dissipation channel when moving upward.

[0012] Preferably, a mounting bracket is fixedly installed on the lateral outer wall of the basin frame, a heat dissipation fan is installed on the mounting bracket, and the heat dissipation fan is correspondingly arranged below the T-shaped iron; the T-shaped iron is of a hollow structure, and the T-shaped iron is in through connection with the lower heat dissipation channel in the framework.

[0013] Preferably, a rotating column is fixedly connected to the rotating disc of the heat dissipation fan along the axial direction, a lifting ring is slidably sleeved on the outer portion of the rotating column, and the lifting ring is fixedly connected to the lower end surface of the piston disc.

[0014] Preferably, a driving ring groove is obliquely formed on the outer portion of the rotating column, a sliding column is slidably connected in the driving ring groove, and the sliding column is fixedly installed on the inner wall of the lifting ring.

[0015] Preferably, a rigid support mechanism for avoiding secondary resonance is arranged in the framework; the rigid support mechanism comprises a plurality of embedded grooves formed in the framework at equal angles along the axial direction, and an elastic reinforcing rib is embeddedly installed in the embedded groove; the elastic reinforcing rib is supported in the framework in an arc shape in the longitudinal direction, and the elastic reinforcing rib is bent towards the stand column; a plurality of elastic support rods are fixedly arranged at equal angles along the axial direction between the piston disc and the dustproof cylinder, the elastic support rods are supported in an arc shape in the longitudinal direction between the piston disc and the dustproof cylinder, and the elastic support rods are bent towards the elastic reinforcing rib.

[0016] Preferably, a reinforcing ring is embeddedly fixed at the intermediate position of the embedded groove in the framework, a plurality of buffer assemblies are arranged at equal angles along the axial direction on the inner wall of the reinforcing ring, and the buffer assemblies are elastically supported between the reinforcing ring and the elastic reinforcing rib.

[0017] Preferably, the buffer assembly comprises a guide column fixedly installed on the inner wall of the reinforcing ring, a power rod is transversely and elastically connected in the guide column, and a buffer spring is elastically connected between the power rod and the guide column.

[0018] Compared with the prior art, the electric loudspeaker has the advantages that the T-shaped iron and the framework are internally penetrated, heat of the voice coil can be absorbed, the heat is directly convected with external air by controlling the heat, heat dissipation in the loudspeaker is accelerated, rigidity of the framework can be supported and reinforced, secondary resonance of the framework is avoided, and sound quality effect is affected.

[0019] Further, the dustproof cover is provided with a heat dissipation mechanism penetrating the upper heat dissipation channel to assist heat dissipation, the heat dissipation fan operates to transmit wind power to the T-shaped iron and the framework, the wind power is transmitted to accelerate internal and external air convection, the conical block in the dustproof cover is lifted and reciprocally moved by transmission of the rotating column, the framework is intermittently penetrated with the outside, internal heat can be directly convected with the outside, and heat dissipation effect of the loudspeaker is improved.

[0020] The conical block is lifted and reciprocally moved to synchronously lift and lower the piston disc, the piston disc assists to push the internal heat of the framework to be discharged outward, and air discharged through the inclined groove and the dustproof column can effectively isolate dust particles, so that most of dust in the external air is concentrated in the dustproof cylinder, high-efficiency heat dissipation is maintained, and external dust particles are effectively isolated.

[0021] Further, the framework is provided with a rigid support mechanism to avoid secondary resonance of the framework, a plurality of elastic reinforcing ribs are arranged along the circumferential direction in the framework, the elastic reinforcing ribs are longitudinally supported in the framework to improve rigidity when the framework is applied, the elastic reinforcing ribs are elastically extruded during lifting and lowering of the piston disc, the elastic reinforcing ribs are bent and deformed in the direction of the elastic support rod, the elastic reinforcing ribs are extruded to improve rigidity of the framework as a whole at high temperature.

[0022] The elastic reinforcing ribs are deformed when being extruded by the elastic support rod, the elastic reinforcing ribs extrude the buffer assembly on the inner side, the buffer assembly is pressed in the reinforcing ring, the reinforcing ring and the framework are extruded and supported, the reinforcing ring is transversely supported and fixed in the inside of the framework, and rigidity of the framework as a whole is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The figure is a structure diagram of the paper basin of the application.

[0024] Figure 2 The figure is a structure diagram of the magnetic steel of the application.

[0025] Figure 3 The figure is a structure diagram of the basin frame of the application.

[0026] Figure 4 The figure is a structure diagram of the framework of the application.

[0027] Figure 5 The figure is a cross-sectional structure diagram of the dustproof cover of the application.

[0028] Figure 6 Structure diagram of the heat dissipation fan of the present application.

[0029] Figure 7 Structure diagram of the T-shaped iron section of the present application.

[0030] Figure 8 Structure diagram of the rotating column of the present application.

[0031] Figure 9 Structure diagram of the dustproof cylinder of the present application.

[0032] Figure 10 Structure diagram of the dustproof column of the present application.

[0033] Figure 11 Structure diagram of the reinforcing ring of the present application.

[0034] Figure 12 Structure diagram of the elastic support rod of the present application.

[0035] In the figure: 1, basin frame; 2, skeleton; 21, lower heat dissipation channel; 22, upper heat dissipation channel; 3, voice coil; 4, elastic wave; 5, T-shaped iron; 6, magnetic steel; 7, Hua Si; 8, paper basin; 9, dust cover; 91, dustproof cylinder; 911, dustproof column; 912, inclined chute; 92, conical heat dissipation hole; 921, conical block; 922, column; 923, piston disc; 10, mounting bracket; 11, heat dissipation fan; 12, rotating column; 13, lifting ring; 14, driving ring groove; 15, sliding column; 16, embedded groove; 17, elastic reinforcing rib; 171, reinforcing ring; 172, buffer assembly; 1721, guide column; 1722, power rod; 1723, buffer spring; 18, elastic support rod. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] Embodiment one: please refer to Figures 1-5The application provides the following technical scheme: an electric loudspeaker, comprising a frame 1 installed on a broadcasting device and a skeleton 2 installed on the frame 1, an audio coil 3 is installed outside the skeleton 2, a reed 4 is installed between the frame 1 and the skeleton 2, a T-shaped iron 5 is embeddedly installed below the skeleton 2, a magnetic steel 6 is installed outside the T-shaped iron 5, a dust cap 7 is installed between the magnetic steel 6 and the frame 1, and the dust cap 7 is installed outside the audio coil 3, a paper cone 8 is installed on the skeleton 2, and a dustproof cover 9 is embeddedly installed at the center position of the paper cone 8, a lower heat dissipation channel 21 and an upper heat dissipation channel 22 are formed in the skeleton 2, the diameter of the upper heat dissipation channel 22 is smaller than that of the lower heat dissipation channel 21, and a heat dissipation mechanism penetrating through the upper heat dissipation channel 22 is arranged on the dustproof cover 9.

[0038] Please refer to Figure 4 、 Figure 5 、 Figure 9 and Figure 10 , the heat dissipation mechanism comprises a dustproof cylinder 91 fixedly installed at the lower end face of the dustproof cover 9, a plurality of dustproof columns 911 are fixedly arranged on the inner wall of the dustproof cylinder 91 along the axial direction at equal angles, and inclined grooves 912 are formed in the dustproof columns 911 and the dustproof cylinder 91; the inclined grooves 912 are connected with the upper heat dissipation channel 22 in the skeleton 2. The heat dissipation mechanism further comprises a conical heat dissipation hole 92 formed at the center position of the dustproof cover 9, a conical block 921 is embeddedly installed in the conical heat dissipation hole 92, and a vertical column 922 is fixedly connected to the bottom face of the dustproof cylinder 91 and is slidably connected with the conical block 921. A piston disc 923 is fixedly installed at the lower end face of the vertical column 922, the piston disc 923 is movably arranged in the lower heat dissipation channel 21, and the piston disc 923 is in contact with the inner wall of the upper heat dissipation channel 22 when moving upward.

[0039] Please refer to Figures 6-10 , an installation support 10 is fixedly installed on the lateral outer wall of the frame 1, a heat dissipation fan 11 is installed on the installation support 10, and the heat dissipation fan 11 is arranged below the T-shaped iron 5; the T-shaped iron 5 has a hollow structure, and the T-shaped iron 5 is in communication with the lower heat dissipation channel 21 in the skeleton 2. A rotating column 12 is fixedly connected to the rotating disc of the fan blade of the heat dissipation fan 11 along the axial direction, a lifting ring 13 is slidably sleeved with the rotating column 12, and the lifting ring 13 is fixedly connected to the lower end face of the piston disc 923. A driving ring groove 14 is obliquely formed in the rotating column 12, a sliding column 15 is slidably connected in the driving ring groove 14, and the sliding column 15 is fixedly installed on the inner wall of the lifting ring 13.

[0040] The frame 1 is installed on the broadcasting device, when an audio electric signal passes through the audio coil 3, the audio coil 3 in the magnetic gap strong magnetic field is subjected to the Lorentz force, the audio coil 3 drives the paper cone 8 to vibrate, the paper cone 8 periodically compresses and stretches the surrounding air to generate sound waves, thereby transmitting sound, and the audio coil 3 is the main heat generating structure in the loudspeaker, and effective heat dissipation of the audio coil 3 can maintain the use effect of the loudspeaker.

[0041] When using the loudspeaker, the heat dissipation fan 11 is controlled to run at the same time, the heat dissipation fan 11 blows wind to the T-shaped iron 5 and the skeleton 2, the voice coil 3 is installed inside the skeleton 2, and most of the heat generated by the voice coil 3 is transmitted to the skeleton 2, the wind force is transmitted inside the skeleton 2, which can assist heat dissipation, and the heat dissipation fan 11 drives the rotating column 12 to rotate synchronously when rotating, the driving ring groove 14 obliquely arranged on the rotating column 12 rotates, the sliding column 15 slidingly connected in the driving ring groove 14 slides longitudinally along the rotating direction of the driving ring groove 14, the sliding column 15 drives the lifting ring 13 to reciprocatingly move up and down, the lifting ring 13 is fixedly connected to the bottom of the piston disc 923, which drives the piston disc 923 to move up and down, the piston disc 923 is connected to the conical block 921 through the vertical column 922 to move synchronously, which drives the conical block 921 to reciprocatingly move up and down, the conical block 921 moves upward away from the conical heat dissipation hole 92 on the dustproof cover 9, at this time, the conical heat dissipation hole 92 is in an open state, so that the heat inside is discharged outward, when the conical block 921 moves downward to close inside the conical heat dissipation hole 92, the loudspeaker returns to a sealed state to avoid external dust entering the inside of the device.

[0042] The piston disc 923 moves from the lower heat dissipation channel 21 to the upper heat dissipation channel 22, the outer wall of the piston disc 923 is attached to the inner wall of the upper heat dissipation channel 22, which can push the heat inside the upper heat dissipation channel 22 to be discharged outward through the dustproof column 911 and the inclined groove 912 when the piston disc 923 moves inside the upper heat dissipation channel 22, when the piston disc 923 moves downward, it can suck external gas initially inside the upper heat dissipation channel 22, when the piston disc 923 moves inside the lower heat dissipation channel 21, the outer wall of the piston disc 923 is at a distance from the lower heat dissipation channel 21, which can facilitate the wind force generated by the heat dissipation fan 11 to be transmitted upward, so that the heat is blown and accumulated above the skeleton 2, so that the heat and external gas can be convected next time, the heat flows faster under the extrusion and suction of the piston disc 923, which can more quickly control the gas flow and cooling, and the obliquely distributed dustproof column 911 and inclined groove 912 can prevent dust in the external gas from entering the inside of the skeleton 2, the dust is accumulated in the dustproof cylinder 91, reducing the influence on the internal structure of the loudspeaker.

[0043] Example two: please refer to Figure 5 , Figures 9-12On the basis of the first embodiment, the rigid support mechanism is also disclosed, and the specific structure is as follows: the rigid support mechanism is arranged in the framework 2 to avoid its secondary resonance; the rigid support mechanism includes a plurality of embedded grooves 16 which are arranged in the framework 2 at equal angles along the axial direction, and the elastic reinforcing ribs 17 are embedded and installed in the embedded grooves 16; the elastic reinforcing ribs 17 are longitudinally supported in the framework 2 in an arc shape, and the elastic reinforcing ribs 17 are curved towards the column 922; a plurality of elastic support rods 18 are fixed at equal angles along the axial direction between the piston disc 923 and the dustproof cylinder 91, the elastic support rods 18 are longitudinally supported between the piston disc 923 and the dustproof cylinder 91 in an arc shape, and the elastic support rods 18 are curved towards the elastic reinforcing ribs 17.

[0044] Please refer to Figure 11 and Figure 12 The reinforcing ring 171 is embedded and fixed in the middle position of the embedded groove 16 in the interior of the framework 2, a plurality of buffer assemblies 172 are arranged at equal angles on the inner wall of the reinforcing ring 171 along the axial direction, and the buffer assemblies 172 are elastically supported between the reinforcing ring 171 and the elastic reinforcing ribs 17. The buffer assembly 172 includes a guide column 1721 fixedly installed on the inner wall of the reinforcing ring 171, a power rod 1722 transversely connected in the guide column 1721, and a buffer spring 1723 elastically connected between the power rod 1722 and the guide column 1721.

[0045] When the piston disc 923 moves longitudinally to extrude the gas in the interior of the framework 2, the elastic support rods 18 between the piston disc 923 and the dustproof cylinder 91 are curved and deformed under the extrusion action, the elastic support rods 18 are curved and deformed towards the elastic reinforcing ribs 17, the deformed elastic support rods 18 extrude and support on the elastic reinforcing ribs 17, so that the elastic reinforcing ribs 17 are elastically deformed towards the inner wall of the framework 2, and the deformed elastic reinforcing ribs 17 are longitudinally supported in the interior of the framework 2, which can improve the overall rigidity of the framework 2.

[0046] In the deformation process of the elastic reinforcing ribs 17, power is applied to the buffer assemblies 172 on the inner side, the power rod 1722 in the buffer assembly 172 moves towards the guide column 1721 under the extrusion action, the power rod 1722 compresses the buffer spring 1723 inwardly, the buffer assembly 172 is supported between the elastic reinforcing ribs 17 and the reinforcing ring 171, the reinforcing ring 171 is transversely supported in the framework 2, and the supporting direction of the reinforcing ring 171 is perpendicular to that of the elastic reinforcing ribs 17, which can further improve the overall rigidity of the framework 2, avoid the deformation of the framework 2 in the high-temperature state to cause secondary resonance, and improve the sound quality effect of the loudspeaker.

[0047] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electric loudspeaker, comprising a frame (1) mounted on a broadcasting device and a frame (2) mounted on the frame (1), wherein a voice coil (3) is sleeved on the outside of the frame (2), and a spring (4) is installed between the frame (1) and the frame (2), characterized in that: A T-shaped iron (5) is fitted and installed below the frame (2), and a magnet (6) is fitted and installed on the outside of the T-shaped iron (5). A washer (7) is installed between the magnet (6) and the frame (1), and the washer (7) is fitted and installed on the outside of the voice coil (3). A paper cone (8) is installed on the frame (2), and a dust cover (9) is fitted and installed at the center of the paper cone (8). The frame (2) has a lower heat dissipation channel (21) and an upper heat dissipation channel (22). The diameter of the upper heat dissipation channel (22) is smaller than that of the lower heat dissipation channel (21). The dust cover (9) is provided with a heat dissipation mechanism that communicates with the upper heat dissipation channel (22) to assist in heat dissipation.

2. The electric loudspeaker according to claim 1, characterized in that: The heat dissipation mechanism includes a dustproof cylinder (91) fixedly installed on the lower end face of the dustproof cover (9). Multiple dustproof columns (911) are fixed at equal angles along the axial direction on the inner wall of the dustproof cylinder (91). Inclined grooves (912) are opened through the dustproof columns (911) and the dustproof cylinder (91). The inclined slot (912) is connected to the upper heat dissipation channel (22) inside the frame (2).

3. The electric loudspeaker according to claim 2, characterized in that: The heat dissipation mechanism also includes a conical heat dissipation hole (92) opened at the center of the dust cover (9), a conical block (921) is fitted into the conical heat dissipation hole (92), and a column (922) is fixedly connected to the lower end face of the conical block (921) and slidably connected to the bottom surface of the dust cover (91).

4. The electrodynamic loudspeaker according to claim 3, characterized in that: A piston disc (923) is fixedly installed on the lower end face of the column (922). The piston disc (923) is movably arranged in the lower heat dissipation channel (21), and the piston disc (923) moves upward to fit and contact the inner wall of the upper heat dissipation channel (22).

5. The electrodynamic loudspeaker according to claim 2, characterized in that: A mounting bracket (10) is fixedly installed on the outer side wall of the basin frame (1), and a cooling fan (11) is installed on the mounting bracket (10). The cooling fan (11) is correspondingly located below the T-shaped iron (5). The T-shaped iron (5) has a hollow structure inside, and the interior of the T-shaped iron (5) is connected to the heat dissipation channel (21) inside the frame (2).

6. The electrodynamic loudspeaker according to claim 5, characterized in that: A rotating column (12) is fixedly connected to the fan blade turntable of the cooling fan (11) along the axial direction. A lifting ring (13) is slidably sleeved on the outside of the rotating column (12). The lifting ring (13) is fixedly connected to the lower end face of the piston disc (923).

7. The electrodynamic loudspeaker according to claim 6, characterized in that: The rotating column (12) has a drive ring groove (14) obliquely opened on the outside, and a sliding column (15) is slidably connected in the drive ring groove (14). The sliding column (15) is fixedly installed on the inner wall of the lifting ring (13).

8. The electrodynamic loudspeaker according to claim 1, characterized in that: The skeleton (2) is provided with a rigid support mechanism to prevent secondary resonance; The rigid support mechanism includes multiple recessed grooves (16) that are opened at equal angles along the axial direction inside the skeleton (2), and elastic reinforcing ribs (17) are fitted into the recessed grooves (16). The elastic reinforcing rib (17) is longitudinally supported in the frame (2) in an arc shape, and the elastic reinforcing rib (17) bends towards the column (922); Multiple elastic support rods (18) are fixed at equal angles along the axial direction between the piston disc (923) and the dust cover (91). The elastic support rods (18) are longitudinally supported in an arc shape between the piston disc (923) and the dust cover (91), and the elastic support rods (18) are bent towards the elastic reinforcing ribs (17).

9. A motorized loudspeaker according to claim 8, characterized in that: The skeleton (2) is fitted and fixed with a reinforcing ring (171) in the middle of the inner groove (16). Multiple buffer components (172) are arranged at equal angles along the axial direction on the inner wall of the reinforcing ring (171). The buffer components (172) are elastically supported between the reinforcing ring (171) and the elastic reinforcing rib (17).

10. A motorized loudspeaker according to claim 9, characterized in that: The buffer assembly (172) includes a guide post (1721) fixedly installed on the inner wall of the reinforcing ring (171), a power rod (1722) is laterally telescopically connected in the guide post (1721), and a buffer spring (1723) is elastically connected between the power rod (1722) and the guide post (1721).

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