Vibration reduction loudspeaker

Abstract

The utility model relates to a vibration reduction loudspeaker, which comprises a frame body, openings at two ends of the frame body are respectively provided with a voice diaphragm and a vibration reduction elastic sheet, a voice coil and a magnetic circuit system are arranged in the frame body, and the magnetic circuit system comprises a U-shaped iron piece, and magnetic steel and a washer which are sequentially arranged in the U-shaped iron piece; damping flexible pieces are connected to the two sides of the U-shaped iron piece, and any damping flexible piece is located between the side portion of the U-shaped iron piece and the side portion of the frame body. The bottom of the U-shaped iron piece is connected with the vibration reduction elastic piece. Compared with the prior art, by arranging the damping flexible piece and the vibration attenuation elastic piece, the energy absorption and vibration attenuation effects are jointly achieved, vibration energy conducted outwards by a magnetic circuit system is reduced, and the risk of generating resonance noise is reduced.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, specifically to a vibration-damping loudspeaker. Background Technology

[0002] Miniature loudspeakers are widely used in portable products such as smartphones, headphones, and smart wearable devices, requiring high sound quality and low vibration within a limited space. Existing miniature loudspeaker structures mainly consist of a diaphragm, voice coil, magnetic circuit system, and frame, with the magnetic circuit system and frame fixed together by adhesive. However, existing structures lack sufficient control over vibration transmission; vibrations from the magnetic circuit system are easily transmitted to the frame, and then from the frame to the speaker enclosure, causing resonance noise. Utility Model Content

[0003] The purpose of this invention is to provide a vibration-damping speaker, addressing the problem that vibrations in the magnetic circuit system of existing miniature loudspeakers are easily transmitted to the frame and then to the speaker shell, causing resonance noise.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A vibration-damping loudspeaker includes a frame, with a diaphragm and a damping spring respectively disposed at the two end openings of the frame. The frame contains a voice coil and a magnetic circuit system, the magnetic circuit system including a U-shaped iron member and a magnet and a washer sequentially disposed within the U-shaped iron member. Both sides of the U-shaped iron member are connected to damping flexible members, with any one damping flexible member located between the side of the U-shaped iron member and the side of the frame. The bottom of the U-shaped iron member is connected to the damping spring.

[0006] This utility model, employing the aforementioned technical solution, connects damping flexible components to both sides of the U-shaped iron piece, with each damping flexible component located between the side of the U-shaped iron piece and the side of the frame. Simultaneously, the bottom of the U-shaped iron piece is connected to a damping spring. The flexible damping component and the damping spring together absorb energy and reduce vibration, decreasing the vibration energy transmitted from the magnetic circuit system to the frame, thereby reducing the vibration energy transmitted from the frame to the speaker shell and minimizing the risk of resonance. Compared to the existing technology where the vibration of the magnetic circuit system in a miniature speaker is easily transmitted to the frame and then to the speaker shell, causing resonance noise, this utility model, by setting up damping flexible components and damping springs, works together to absorb energy and reduce vibration, decreasing the outward transmission of vibration energy from the magnetic circuit system and reducing the risk of resonance noise. Furthermore, by setting up damping flexible components and damping springs, the offset of the magnetic circuit system in the X, Y, and Z directions can be effectively suppressed, resulting in more stable product quality and better consistency.

[0007] Furthermore, the damping flexible component is connected to the side of the U-shaped iron component via fluid injection; a gap is left between the damping flexible component and the side of the frame; fluid injection is typically used to coat the surface of existing components or products with a layer of fluid material, such as rubber, silicone, or other elastomers. The process involves coating the surface of the existing component with the fluid material by spraying, impregnation, or injection, and then forming a coating layer by curing or cooling; here, the damping flexible component is integrated with the U-shaped iron component via fluid injection, resulting in a tight and reliable connection; the gap between the damping flexible component and the frame serves as a buffer space, which provides better vibration reduction compared to a tight fit between the damping flexible component and the frame.

[0008] Furthermore, the damping flexible element is elongated; the two ends of the damping flexible element are aligned with the two ends of the U-shaped iron element, or extend beyond the two ends of the U-shaped iron element; with this configuration, the damping flexible element is relatively long and can cover the U-shaped iron element in the length direction, thus providing a better vibration reduction and energy absorption effect on the U-shaped iron element.

[0009] Furthermore, the damping flexible element is made of silicone or rubber; damping flexible elements made of this material have better vibration reduction effect.

[0010] Furthermore, the damping spring includes a fixed plate, a bearing plate, and several bendable and deformable damping arms; the fixed plate is annular and fixedly connected to the end of the frame; the bearing plate is located in the hollow part in the middle of the fixed plate and is connected to the fixed plate through the damping arms; the bottom of the U-shaped iron piece is connected to the bearing plate; with this structure, when the magnetic circuit system vibrates, the U-shaped iron piece squeezes the bearing plate to generate displacement, and the damping arms can be bent and deformed to absorb energy, resulting in a better damping effect.

[0011] Furthermore, the two ends of the fixing plate extend beyond the two ends of the U-shaped iron piece; the two ends of the bearing plate are flush with or extend beyond the two ends of the U-shaped iron piece; at least one damping arm is connected between any end of the bearing plate and the end of the adjacent fixing plate; with this configuration, the damping plate has a simple structure, is easy to manufacture, and has a good energy absorption effect.

[0012] Furthermore, two damping arms are connected between any end of the bearing plate and the end of the adjacent fixed plate. Both damping arms are S-shaped and symmetrically arranged on both sides of the bearing plate. The damping spring sheet has a symmetrical structure, and the displacement of the bearing plate and the energy absorption of the damping arms are balanced. At the same time, the S-shaped damping arms can generate a large amount of deformation and have a good energy absorption effect.

[0013] Furthermore, a groove adapted to the shape of the bearing plate is formed on the bottom surface of the U-shaped iron piece, and the bearing plate is embedded in the groove; this arrangement facilitates precise positioning between the U-shaped iron piece and the damping spring during speaker assembly.

[0014] Furthermore, the fixing plate has several positioning holes, and the end face of the frame near the fixing plate has positioning posts corresponding to the positioning holes one by one. The positioning posts are fixedly inserted into the positioning holes. This arrangement facilitates precise positioning between the frame and the damping spring during speaker assembly.

[0015] Furthermore, the bottom of the U-shaped iron piece is glued to the bearing plate; the glued connection is easy to operate and is firm and reliable.

[0016] Compared with existing technologies, the beneficial effects of this utility model are as follows: By setting up a damping flexible component and a vibration damping spring, they work together to absorb energy and reduce vibration, thereby reducing the vibration energy transmitted outward by the magnetic circuit system and reducing the risk of resonance noise; by setting up a damping flexible component and a vibration damping spring, the magnetic circuit system's offset in the X, Y, and Z directions can also be effectively suppressed, resulting in more stable product quality and better consistency; the damping flexible component is integrated with the U-shaped iron component through a fluid encapsulation process, resulting in a tight and reliable connection; a gap is left between the damping flexible component and the frame as a buffer space, which provides better vibration reduction than a tight fit between the damping flexible component and the frame; the vibration damping spring includes a fixed plate, a bearing plate, and several flexible and deformable vibration damping arms. With this structure, when the magnetic circuit system vibrates, the U-shaped iron component squeezes the bearing plate to generate displacement, and the flexible and deformable vibration damping arms absorb energy, resulting in better vibration reduction. Attached image description:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0019] Figure 3 This is an exploded view of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of this utility model after the sound diaphragm has been removed;

[0021] Figure 5 A schematic diagram of the structure of the U-shaped iron component, the damping flexible component, and the vibration damping spring.

[0022] Figure 6 This is a schematic diagram of the structure of the vibration damping spring.

[0023] Figure 7 A schematic diagram of the structure of the U-shaped iron component and the damping flexible component;

[0024] Figure 8 A schematic diagram of the structure for testing the four-point vibration damping effect of the speaker enclosure;

[0025] Figure 9 A schematic diagram showing the test results of four-point vibration reduction effect of a speaker enclosure with an existing loudspeaker installed.

[0026] Figure 10 This is a schematic diagram showing the test results of the four-point vibration reduction effect of the speaker enclosure equipped with this utility model.

[0027] The markings in the diagram are: 01-speaker, 02-speaker enclosure, 1-diaphragm, 2-voice coil, 3-frame, 31-positioning post, 32-block, 4-flexible circuit board, 5-washer, 6-magnet, 7-U-shaped iron piece, 71-groove, 8-damping flexible part, 81-slot, 9-vibration damping spring, 91-fixing plate, 92-bearing plate, 93-vibration damping arm, 94-positioning hole. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 only used to explain this utility model and are not intended to limit this utility model.

[0030] This embodiment provides a vibration-damping loudspeaker, such as Figures 1-7 As shown, the device includes a frame 3, with a diaphragm 1 and a damping spring 9 respectively installed at the two end openings of the frame 3. The frame 3 contains a voice coil 2 and a magnetic circuit system. The magnetic circuit system includes a U-shaped iron piece 7 and a magnet 6 and a washer 5 arranged sequentially inside the U-shaped iron piece 7. Both sides of the U-shaped iron piece 7 are connected to damping flexible pieces 8, and any damping flexible piece 8 is located between the side of the U-shaped iron piece 7 and the side of the frame 3. The bottom of the U-shaped iron piece 7 is connected to the damping spring 9.

[0031] The damping flexible member 8 is connected to the side of the U-shaped iron member 7 by fluid injection; the damping flexible member 8 abuts against or has a gap with the side of the frame 3; in this embodiment, the option of having a gap between the damping flexible member 8 and the side of the frame 3 is selected. Specifically: the damping flexible member 8 is long and strip-shaped with a rectangular cross-section. One side of it is connected to the U-shaped iron member 7, and the other side opposite to this side has a gap of about 0.1 mm between it and the side of the frame 3.

[0032] The two ends of the damping flexible member 8 are aligned with the two ends of the U-shaped iron member 7, or extend beyond the two ends of the U-shaped iron member 7;

[0033] The damping flexible element 8 is made of silicone or rubber; in this embodiment, the damping flexible element 8 is made of silicone.

[0034] A slot 81 is provided on one side of the damping flexible component 8 facing the side of the frame 3, and a corresponding block 32 is provided on the side of the frame 3. The block 32 is engaged in the slot 81, which facilitates accurate positioning of the damping flexible component 8 and the frame 3 during speaker assembly.

[0035] The damping spring 9 includes a fixed plate 91, a bearing plate 92, and several bendable and deformable damping arms 93; the fixed plate 91 is ring-shaped and fixedly connected to the end of the frame 3; the bearing plate 92 is set in the hollow part in the middle of the fixed plate 91, and it is connected to the fixed plate 91 through the damping arms 93; the bottom of the U-shaped iron piece 7 is connected to the bearing plate 92.

[0036] The two ends of the fixing plate 91 extend out of the two ends of the U-shaped iron piece 7; the two ends of the bearing plate 92 are flush with the two ends of the U-shaped iron piece 7, or extend out of the two ends of the U-shaped iron piece 7; at least one damping arm 93 is connected between any end of the bearing plate 92 and the end of the adjacent fixing plate 91; in this embodiment, two damping arms 93 are connected between any end of the bearing plate 92 and the end of the adjacent fixing plate 91, and both damping arms 93 are S-shaped and symmetrically arranged on both sides of the bearing plate 92.

[0037] The bottom surface of the U-shaped iron piece 7 has a groove 71 that matches the shape of the support piece 92, and the support piece 92 is embedded in the groove 71.

[0038] The fixing plate 91 has several positioning holes 94. The frame 3 has a positioning post 31 corresponding to each positioning hole 94 at one end near the fixing plate 91. The positioning post 31 is fixedly inserted into the positioning hole 94. The positioning post 31 and the corresponding positioning hole 94 are heat-fused to ensure the connection strength between the frame 3 and the fixing plate 91.

[0039] The bottom of the U-shaped iron piece 7 is glued to the bearing plate 92;

[0040] The loudspeaker also includes a flexible circuit board 4 electrically connected to the voice coil 2, which is glued to the frame 3. When the loudspeaker is working, the flexible circuit board 4 transmits audio electrical signals to the voice coil 2, generating an alternating magnetic field around the voice coil 2, which interacts with the magnetic field of the magnetic circuit system inside the loudspeaker, causing the voice coil 2 and the connected diaphragm 1 to vibrate, thereby producing sound.

[0041] The vibration reduction effect was tested, such as... Figure 8 As shown, speaker 01 is installed in a standard CC-number speaker enclosure 02. The amplitude of the enclosure surface at points a, b, c, and d is measured at different frequencies of the swept frequency signal. By installing the speaker of this invention and a conventional speaker respectively, measurements are taken and compared to verify whether the speaker of this invention can effectively reduce the amplitude. The test results of the conventional speaker (which does not use damping flexible parts and vibration damping spring structures) are as follows... Figure 9 As shown, the amplitude at the four points is between 0.15mm and 0.2mm; the test results of this utility model speaker are as follows. Figure 10 As shown, the amplitude of the four points is about 0.03mm, which shows that the vibration reduction effect of the speaker of this utility model is obvious.

[0042] The present invention, employing the aforementioned technical solution, provides damping flexible members 8 between both sides of the U-shaped iron member 7 and both sides of the frame 3. The opposite sides of any one of the damping flexible members 8 are connected to the side of the U-shaped iron member 7 and the side of the frame 3, respectively. Simultaneously, the bottom of the U-shaped iron member 7 is connected to a damping spring 9. The flexible damping members 8 and the damping spring 9 together provide energy absorption and vibration reduction, reducing the vibration energy transmitted from the magnetic circuit system to the frame 3, thereby reducing the vibration energy transmitted from the frame 3 to the speaker housing and reducing the risk of resonance. Compared to the prior art where the vibration of the magnetic circuit system in a miniature loudspeaker is easily transmitted to the frame and then to the speaker housing, causing resonance noise, the present invention, by providing the damping flexible members 8 and the damping spring 9, jointly provides energy absorption and vibration reduction, reducing the vibration energy transmitted from the magnetic circuit system to the speaker housing. The outward transmission of vibration energy reduces the risk of resonance noise. Simultaneously, by incorporating the damping flexible component 8 and the vibration damping spring 9, the offset of the magnetic circuit system in the X, Y, and Z directions can be effectively suppressed, resulting in more stable product quality and better consistency. The damping flexible component 8 is integrated with the U-shaped iron component 7 through a fluid encapsulation process, ensuring a tight and reliable connection. A gap is left between the damping flexible component 8 and the frame 3 as a buffer space, providing better vibration damping compared to a tight fit between the damping flexible component 8 and the frame 3. The vibration damping spring 9 includes a fixed plate 91, a bearing plate 92, and several bendable and deformable damping arms 93. With this structure, when the magnetic circuit system vibrates, the U-shaped iron component 7 compresses the bearing plate 92, causing displacement, and the damping arms 93 can be bent and deformed to absorb energy, resulting in better vibration damping.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vibration-damping loudspeaker, characterized in that: The frame includes a frame (3), with a diaphragm (1) and a damping spring (9) respectively installed at the two ends of the frame (3). The frame (3) is equipped with a voice coil (2) and a magnetic circuit system. The magnetic circuit system includes a U-shaped iron piece (7) and a magnet (6) and a washer (5) arranged sequentially inside the U-shaped iron piece (7). Both sides of the U-shaped iron piece (7) are connected to damping flexible pieces (8), and any damping flexible piece (8) is located between the side of the U-shaped iron piece (7) and the side of the frame (3). The bottom of the U-shaped iron piece (7) is connected to the damping spring (9). The damping flexible component (8) is connected to the side of the U-shaped iron component (7) by fluid injection; there is a gap between the damping flexible component (8) and the side of the frame (3); a slot (81) is provided on the side of the damping flexible component (8) facing the side of the frame (3), and a corresponding block (32) is provided on the side of the frame (3), and the block (32) is engaged in the slot (81).

2. The vibration-damping loudspeaker according to claim 1, characterized in that: The damping flexible member (8) is long and narrow; the two ends of the damping flexible member (8) are aligned with the two ends of the U-shaped iron member (7), or extend beyond the two ends of the U-shaped iron member (7).

3. The vibration-damping loudspeaker according to claim 1, characterized in that: The damping flexible element (8) is made of silicone or rubber.

4. The vibration-damping loudspeaker according to claim 1, characterized in that: The damping spring (9) includes a fixed plate (91), a bearing plate (92), and several bendable and deformable damping arms (93); the fixed plate (91) is ring-shaped and fixedly connected to the end of the frame (3); the bearing plate (92) is set in the hollow part in the middle of the fixed plate (91), and it is connected to the fixed plate (91) through the damping arms (93); the bottom of the U-shaped iron piece (7) is connected to the bearing plate (92).

5. The vibration-damping loudspeaker according to claim 4, characterized in that: The two ends of the fixing plate (91) extend out of the two ends of the U-shaped iron piece (7); the two ends of the bearing plate (92) are flush with the two ends of the U-shaped iron piece (7), or extend out of the two ends of the U-shaped iron piece (7); at least one damping arm (93) is connected between any end of the bearing plate (92) and the end of the adjacent fixing plate (91).

6. The vibration-damping loudspeaker according to claim 5, characterized in that: Two damping arms (93) are connected between any end of the bearing plate (92) and the end of the adjacent fixing plate (91). Both damping arms (93) are S-shaped and symmetrically arranged on both sides of the bearing plate (92).

7. The vibration-damping loudspeaker according to claim 5, characterized in that: The bottom surface of the U-shaped iron piece (7) is provided with a groove (71) that matches the shape of the bearing piece (92), and the bearing piece (92) is embedded in the groove (71).

8. The vibration-damping loudspeaker according to claim 4, characterized in that: The fixing plate (91) has a plurality of positioning holes (94). The frame (3) has a positioning post (31) at one end near the fixing plate (91) that corresponds to the positioning hole (94). The positioning post (31) is fixedly inserted into the positioning hole (94). The positioning post (31) and the corresponding positioning hole (94) are heat-fused together.

9. The vibration-damping loudspeaker according to claim 4, characterized in that: The bottom of the U-shaped iron piece (7) is glued to the bearing plate (92).

Images