Vibration loudspeaker fixing structure

Abstract

The utility model discloses a vibration loudspeaker fixing structure, which comprises a first shell, a second shell, a vibration loudspeaker, a first fixed damper, a second fixed damper and a fixed counterweight, the first shell is in an opening shape and is provided with a hollow cavity, a seat sleeve is integrally formed in the hollow cavity, the first fixed damper, the fixed balance weight and the vibration loudspeaker are sequentially stacked in the seat sleeve from bottom to top, the second fixed damper is placed on the upper end face of the seat sleeve, and the second shell covers the opening. The upper plate surface of the conduction plate abuts against the inner wall of the second housing, and the lower plate surface abuts against the upper end surface of the second fixed damper and the upper end surface of the vibration loudspeaker. Compared with the prior art, the utility model has the following advantages: high-efficiency vibration absorption: resonance sound pressure is eliminated by a reverse vibration counteracting principle, and the howling suppression ratio is greater than or equal to 90%; flexible adjustment is achieved, and different resonant frequency requirements can be met by replacing fixed dampers or conducting plates and fixing counter weight mass; extra electronic components are not needed, and the manufacturing cost and the maintenance difficulty are reduced.

Description

Technical Field

[0001] This utility model relates to the field of acoustic equipment technology, specifically to a vibrating loudspeaker fixing structure that eliminates sound pressure by adjusting the resonant frequency, which is particularly suitable for suppressing howling problems in voice transmission and improving audio output quality. Background Technology

[0002] Traditional speaker mounting structures have the following problems in suppressing resonance:

[0003] 1. Resonance-induced howling: When a speaker is working, mechanical resonance generates additional sound pressure, resulting in a piercing howling sound during voice transmission;

[0004] 2. Difficulty in fixed frequency matching: Existing designs cannot flexibly adjust the resonant frequency to adapt to different working environments;

[0005] 3. Complex structure: Some vibration damping devices rely on additional damping materials, which increases the size and cost of the equipment. Utility Model Content

[0006] One of the purposes of this utility model is to provide a fixed structure for a vibrating loudspeaker, which eliminates resonant sound pressure and solves the howling problem by using the principle of reverse vibration cancellation and adjustable parameter design, while improving installation flexibility and adaptability.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a vibrating speaker fixing structure, comprising a first outer shell, a second outer shell, a vibrating speaker, a first fixed spring, two second fixed springs, a conductive plate, and a fixed counterweight; the first outer shell is open-shaped and has a hollow cavity, in which a seat is integrally formed, and the first fixed spring, the fixed counterweight, and the vibrating speaker are stacked sequentially from bottom to top in the seat. The two second fixed springs are placed on the upper end face of the seat and located on both sides of the vibrating speaker. The second outer shell covers the open, and the upper plate of the conductive plate abuts against the inner wall of the second outer shell, and the lower plate abuts against the upper end face of the second fixed spring and the upper end face of the vibrating speaker.

[0008] Furthermore, this utility model provides a vibrating loudspeaker fixing structure, wherein the vibrating loudspeaker includes an iron core, a voice coil, a pair of magnets, a first vibrating plate, and a second vibrating plate. The iron core has a boss in the middle, the voice coil is sleeved on the boss and glued to the upper end face of the iron core, the two magnets are symmetrically arranged on the outer ring of the voice coil and glued to the upper end face of the iron core, the lower end face of the iron core is in close contact with the fixed counterweight, the second vibrating plate is placed on the upper end face of the voice coil, the second vibrating plate has bending plates on both sides, the bending plates are bent downward and fixed to the iron core by laser welding, and the first vibrating plate is fixed to the center of the second vibrating plate by laser welding.

[0009] Furthermore, the present invention provides a vibration speaker fixing structure in which the conductive plate and the fixing counterweight are both made of metal, and the second shell is made of soft silicone.

[0010] Furthermore, the present invention provides a vibration speaker fixing structure, wherein an annular stepped groove is formed on the inner edge of the opening, and the outer edge of the second outer shell is fitted into the annular stepped groove.

[0011] The second objective of this utility model is to provide a method for suppressing resonance in a vibrating loudspeaker, which includes the following steps:

[0012] The second fixed spring was replaced to adjust its rigidity, and the mass of the conduction plate and the second housing were changed to adjust the resonant frequency F of the second fixed spring, the conduction plate, and the vibrating speaker. h12 Its function expression is as follows:

[0013]

[0014] Wherein: K1 - rigidity of the second diaphragm in the vibrating loudspeaker; m1 - mass of the voice coil in the vibrating loudspeaker; m2 - mass of the first diaphragm in the vibrating loudspeaker; K2 - rigidity of the second fixed spider; m3 - mass of the conducting plate; m4 - mass of the second outer shell;

[0015] Replace the first fixed spring to adjust its rigidity, change the mass of the fixed counterweight and the mass of the first outer shell to adjust the resonant frequency F of the fixed structure. h3 Its function expression is as follows:

[0016]

[0017] Wherein: K3 - rigidity of the first fixed wave; m5 - mass of the fixed counterweight; m6 - mass of the first outer shell;

[0018] Repeat the above steps until the adjusted resonant frequency satisfies F. h12 +F h3 =0.

[0019] This invention has the following advantages over the prior art:

[0020] 1. High-efficiency vibration damping: The principle of reverse vibration cancellation eliminates resonant sound pressure, with a howling suppression rate of ≥90%;

[0021] 2. Flexible adjustment: Supports matching different resonant frequency requirements by replacing the fixed spring or conduction plate and the fixed counterweight mass;

[0022] 3. Compact structure: No additional electronic components are required, reducing manufacturing costs and maintenance difficulty. Attached Figure Description

[0023] Figure 1 This is an exploded view of a vibration loudspeaker fixing structure according to the present invention;

[0024] Figure 2 This is a cross-sectional view of a vibration loudspeaker fixing structure according to the present invention;

[0025] Figure 3 The graph shows the test results of the vibration loudspeaker fixing structure of this utility model, comparing the sound pressure output difference between the traditional structure and the structure of this utility model.

[0026] Figure 4 This is an exploded view of the vibrating loudspeaker structure in the vibrating loudspeaker fixing structure of this utility model;

[0027] Figure 5 This is a cross-sectional view of the vibrating loudspeaker structure in the vibrating loudspeaker fixing structure of this utility model.

[0028] The components are: 1. First outer shell; 2. First fixed spring; 3. Second fixed spring; 4. Fixed counterweight; 5. Seat cover; 6. Second outer shell; 7. Annular stepped groove; 8. Conducting plate; 9. Iron core; 10. Voice coil; 11. Magnet; 12. First diaphragm; 13. Second diaphragm; 14. Boss. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] like Figures 1-3 As shown, this embodiment provides a vibrating speaker fixing structure, which includes a first outer shell 1, a second outer shell 6, a vibrating speaker, a first fixed spring 2, two second fixed springs 3, a conductive plate 8, and a fixed counterweight 4. The first outer shell 1 has an open shape and a hollow cavity. A seat 5 is integrally formed in the hollow cavity. The first fixed spring 2, the fixed counterweight 4, and the vibrating speaker are stacked sequentially from bottom to top in the seat 5. The two second fixed springs 3 are placed on the upper end surface of the seat 5 and located on both sides of the vibrating speaker. The second outer shell 6 covers the open shape. The specific structure is as follows. Figure 2 As shown, an annular stepped groove 7 is formed on the inner edge of the opening, and the outer edge of the second outer shell 6 is fitted into the annular stepped groove 7; the upper plate surface of the conductive plate 8 abuts against the inner wall of the second outer shell 6, and the lower plate surface abuts against the upper end surface of the second fixed spring wave 3 and the upper end surface of the vibrating speaker.

[0033] The vibration speaker is a prior art technology, such as... Figure 4 and Figure 5 As shown, it includes an iron core 9, a voice coil 10, a pair of magnets 11, a first diaphragm 12, and a second diaphragm 13. The iron core 9 has a boss 14 in the middle. The voice coil 10 is sleeved on the boss 14 and glued to the upper end face of the iron core 9. The two magnets 11 are symmetrically arranged on the outer ring of the voice coil 10 and glued to the upper end face of the iron core 9. The lower end face of the iron core 9 is in close contact with the fixed counterweight 4. The second diaphragm 13 is placed on the upper end face of the voice coil 10. The second diaphragm 13 has bent plates on both sides. The bent plates are bent downward and fixed to the iron core 9 by laser welding. The first diaphragm 12 is fixed to the center of the second diaphragm 13 by laser welding. The specific structure is not described in detail here.

[0034] A method for suppressing resonance of a vibrating loudspeaker using the above-mentioned fixing structure includes the following steps:

[0035] Replace the second fixed spring 3 to adjust its rigidity, change the mass of the conduction plate 8 and the mass of the second housing 6, so as to adjust the resonant frequency F of the second fixed spring 3, the conduction plate 8 and the vibrating speaker. h12Its function expression is as follows:

[0036]

[0037] Wherein: K1 - rigidity of the second diaphragm 13 in the vibrating loudspeaker; m1 - mass of the voice coil 10 in the vibrating loudspeaker; m2 - mass of the first diaphragm 12 in the vibrating loudspeaker; K2 - rigidity of the second fixed spider 3; m3 - mass of the conducting plate 8; m4 - mass of the second outer shell 6;

[0038] The rigidity of the first fixed spring wave 2 is adjusted by replacing it, and the mass of the fixed counterweight 4 and the mass of the first outer shell 1 are changed to adjust the resonant frequency F of the fixed structure. h3 Its function expression is as follows:

[0039]

[0040] Wherein: K3 - rigidity of the first fixed wave 2; m5 - mass of the fixed counterweight 4; m6 - mass of the first outer shell 1;

[0041] Repeat the above steps until the adjusted resonant frequency satisfies F. h12 +F h3 =0.

[0042] The material and parameter selections in this embodiment are as follows:

[0043] First outer casing 1: Plastic, mass (m6 < 30g), fixed to the main body of the equipment;

[0044] Second outer shell 6: made of silicone, plastic or metal, with a mass (m4 < 20g), connected to the first outer shell 1 via a conductive plate 8;

[0045] Conductor plate 8: Metal, mass (m3 < 15g), size < 150mm 3 The two ends are respectively connected to the vibration speaker and the second outer shell 6;

[0046] First fixed wave 2: made of silicone, EVA or polyurethane, with rigidity K1 less than 5e10pa (Young's modulus), connecting the first outer shell 1, the vibration speaker and the conduction plate 8;

[0047] Second fixed spring 3: made of silicone, EVA or polyurethane, with rigidity K2 less than 5e10pa (Young's modulus), connecting the conduction plate 8 to the second shell 6 and fixing the counterweight 4 to the first shell 1;

[0048] Fixed counterweight 4: a metal block with a mass (m5 < 10g), connected to the first outer shell 1 via the second fixed spring 3;

[0049] The assembly process includes attaching the upper end face of the vibrating speaker to the center of the bottom of the conduction plate 8 with glue or laser welding, fixing the upper end face of the conduction plate 8 to the second housing 6 with glue or screws, connecting the lower end face to the upper end face of the seat 5 through the second fixed spring 3, and connecting the lower end face of the vibrating speaker to the first fixed spring 2 through the fixed counterweight 4, thus forming a closed vibration circuit.

[0050] The working principle is as follows:

[0051] Forward vibration path: The vibrating speaker drives the conducting plate 8 through the first vibrating plate 12 to transmit the vibration to the second housing 6; at the same time, the vibration is transmitted to the first housing 1 through the first fixed spring wave 2.

[0052] Reverse vibration path: The vibrating speaker drives the fixed counterweight 4 through the iron core 9, and drives the first outer shell 1 to generate reverse vibration through the second fixed spring 3;

[0053] Resonance cancellation: The vibration phases of the first outer shell 1 and the second outer shell 6 are opposite, and the resonant frequency satisfies Fh12+Fh3=0, so the sound pressure cancels each other out.

[0054] For specific effects, please refer to Figure 3 ,in:

[0055] The horizontal axis is marked with frequency (Hz), ranging from 100Hz to 10kHz, using a logarithmic scale to represent different frequency points of the test;

[0056] The vertical axis, labeled "dB", ranges from -80dB to -10dB and is used to measure the values ​​of acoustic or vibration parameters at different frequencies. The closer the value is to -10dB, the larger the value of the parameter, and the closer it is to -80dB, the smaller the value.

[0057] The chart uses dashed and solid lines and labels to distinguish between them:

[0058] Solid line: Represents the test results of the vibrating speaker mounting structure without using the technology of this utility model;

[0059] Dashed line: Represents the test results of the vibration speaker mounting structure after adopting the technology of this utility model;

[0060] Low frequency band (around 100Hz-500Hz): The two curves are quite similar, with values ​​fluctuating between -70dB and -80dB, indicating that there is little difference in test results between using and not using this utility model in the low frequency band.

[0061] Mid-frequency band (around 500Hz-2kHz): The curve for "not using this utility model" shows a more obvious upward trend, reaching about -20dB near 2kHz; while the curve for "using this utility model" also rises, but the magnitude is relatively small, reaching about -45dB near 2kHz. The difference between the two gradually increases, indicating that this utility model has a significant impact on the test results in the mid-frequency band.

[0062] High frequency band (around 2kHz-10kHz): The curve of "not using this utility model" fluctuates after 2kHz and shows an overall downward trend; the curve of "using this utility model" also fluctuates, but the value is always lower than that of the curve of "not using this utility model", indicating that this utility model can still keep the test parameters at a low level in the high frequency band.

[0063] Overall, by comparing the test results of the vibration speaker mounting structure using and not using the present invention at different frequencies, the impact of the present invention on the performance of the vibration speaker is intuitively demonstrated, especially showing obvious differences in the mid-to-high frequency range. Using the present invention can optimize the test parameters, which means better acoustic performance and lower vibration interference.

[0064] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0065] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A vibrating loudspeaker fixing structure, characterized in that, The device includes a first outer shell (1), a second outer shell (6), a vibrating speaker, a first fixed spring (2), two second fixed springs (3), a conductive plate (8), and a fixed counterweight (4). The first outer shell (1) has an open shape and a hollow cavity. A seat cover (5) is integrally formed in the hollow cavity. The first fixed spring (2), the fixed counterweight (4), and the vibrating speaker are stacked sequentially from bottom to top in the seat cover (5). The two second fixed springs (3) are placed on the upper end face of the seat cover (5) and located on both sides of the vibrating speaker. The second outer shell (6) covers the open shape. The upper plate of the conductive plate (8) abuts against the inner wall of the second outer shell (6), and the lower plate abuts against the upper end face of the second fixed spring (3) and the upper end face of the vibrating speaker.

2. The vibration loudspeaker fixing structure according to claim 1, characterized in that, The vibrating loudspeaker includes an iron core (9), a voice coil (10), a pair of magnets (11), a first diaphragm (12), and a second diaphragm (13). The iron core (9) has a boss (14) in the middle. The voice coil (10) is fitted onto the boss (14) and glued to the upper surface of the iron core (9). The two magnets (11) are symmetrically arranged on the outer ring of the voice coil (10) and glued to the upper surface of the iron core (9). The lower surface of the iron core (9) is close to the fixed counterweight (4). The second diaphragm (13) is placed on the upper surface of the voice coil (10). The second diaphragm (13) has bent plates on both sides. The bent plates are bent downward and fixed to the iron core (9) by laser welding. The first diaphragm (12) is fixed to the center of the second diaphragm (13) by laser welding.

3. The vibration loudspeaker fixing structure according to claim 1, characterized in that, The conductive plate (8) and the fixed counterweight (4) are both made of metal, and the second outer shell (6) is made of soft silicone, plastic or metal.

4. The vibration loudspeaker fixing structure according to claim 1, characterized in that, The inner edge of the opening has an annular stepped groove (7), and the outer edge of the second outer shell (6) is fitted into the annular stepped groove (7).

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