Warning speaker and vehicle-mounted device
By integrating the folded ring and cone design, combined with the multi-corrugated folded ring and flat protective mesh cover, the problems of poor acoustic performance and complex manufacturing of warning speakers are solved, achieving cost reduction and improved acoustic performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIFANG GOERDYNA TECH CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-24
AI Technical Summary
Existing warning loudspeakers have poor acoustic performance, high manufacturing costs or complex structures, and are prone to problems such as segmented vibration and energy loss.
The design incorporates a folded ring and a cone, with the folded ring recessed in the direction away from the protective mesh cover to form multiple wave-shaped units. A specific distance is set between the folded ring and the protective mesh cover. Combined with the multi-corrugated folded ring and flat protective mesh cover structure, the front cavity volume is reduced, and the fatigue resistance and vibration consistency are improved.
It simplifies the manufacturing process, reduces costs, improves acoustic performance, avoids mid-frequency dips, and enhances vibration consistency and high-frequency extension.
Smart Images
Figure CN224555773U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electroacoustic conversion technology, and in particular to a warning speaker and vehicle-mounted equipment. Background Technology
[0002] Warning speakers, such as AVAS (Acoustic Vehicle Alerting System) speakers, are active sound devices typically installed in vehicles, such as electric vehicles or hybrid vehicles. They are designed to alert pedestrians, especially visually impaired individuals, to the approach of a vehicle by simulating engine sounds or specific warning sounds, thus compensating for the safety hazard of insufficient noise when electric vehicles or hybrid vehicles are traveling at low speeds.
[0003] Currently, warning speakers mainly have the following two design methods: like Figure 1 As shown, the first method involves designing the protective mesh 20' of the warning speaker 100' as a concave cone structure, referencing the cone 30', and matching it with a single corrugated surround 32' protruding towards the protective mesh 20', as... Figure 1 As shown. With this design, the protective mesh 20' can form a positive-gain resonance in the front cavity 40', improving the mid-frequency valley phenomenon caused by the segmented vibration of the folded ring 32', and obtaining an effective frequency response curve in the 0.3kHz~6kHz frequency band, as shown. Figure 2 The red curve shown in the finite element simulation indicates good acoustic performance. However, this type of warning speaker 100' requires the protective mesh cover 20' to be designed as a concave cone structure facing the cone 30', which is inconvenient to manufacture and has high manufacturing costs.
[0004] The second approach involves designing the warning speaker's protective grille as a flat plate, complemented by a single corrugated surround protruding towards the grille. While this simplifies the grille's structure, makes it easier to manufacture, and reduces production costs, this design results in a large front cavity volume. During cone vibration, stress is concentrated near the surround on the cone, easily leading to segmented vibrations. This causes a dip in the mid-frequency response curve of the speaker, especially between 3kHz and 4kHz, resulting in poor acoustic performance. Figure 2 The blue curve shown is from the finite element simulation. Utility Model Content
[0005] The main purpose of this invention is to propose a warning speaker and vehicle-mounted equipment, which aims to solve the technical problem of poor acoustic performance of existing warning speakers.
[0006] To achieve the above objectives, this utility model proposes a warning speaker, the warning speaker comprising: shell; A protective mesh cover is provided on the outer shell and forms an installation cavity with the outer shell; A cone, located within the mounting cavity and forming a front cavity with the protective mesh cover, the vibration direction of the cone being a first direction; the cone includes a cone body and a folded ring located at the outer edge of the cone body, the folded ring being integrally formed with the cone body; The folded ring is recessed in the direction away from the protective mesh cover, and the folded ring forms a plurality of wavy units from the inside to the outside. The distances between the wavy units, the inner side of the folded ring, the outer side of the folded ring and the protective mesh cover along the first direction are the first distance, the second distance and the third distance, respectively, wherein the first distance is not less than the second distance and the third distance.
[0007] In one embodiment, the protective mesh cover is flat and includes a protective area and an installation area. The installation area surrounds the protective area and is installed on the outer edge of the housing. The protective area forms a protective plane on the side facing the cone. The folded ring is positioned near the installation area corresponding to the protective plane. The first spacing, the second spacing, and the third spacing are the spacings along the first direction between the wavy unit, the inner side, and the outer side and the protective plane, respectively.
[0008] In one embodiment, the folded ring is alternately provided with crests and troughs from the inside to the outside, and the crests and troughs are all wave-shaped units. The apex of all the crests is located on a first reference plane, wherein the first reference plane is parallel to the protective plane.
[0009] In one embodiment, the first spacing formed between the apex of each wave crest and the protective plane along the first direction is a first sub-spacing, and the inner side and the outer side are both located on the first reference plane, so that each of the first sub-spacings, the second spacing and the third spacing are equal.
[0010] In one embodiment, the first spacing formed between the bottom point of each trough and the protective plane along the first direction is a second sub-spacing. The bottom points of all the troughs are located on a second reference plane so that all the second sub-spacings are equal and all the wave-shaped units have the same size along the first direction, wherein the second reference plane is parallel to the protective plane.
[0011] In one embodiment, the first sub-spacing is L, where 1.3mm ≤ L ≤ 2mm.
[0012] In one embodiment, all the wavy units have the same size along a second direction, wherein the second direction is the direction from the inside to the outside of the fold; And / or, All of the wave-shaped units are arc-shaped units, and all of the wave-shaped units have the same curvature.
[0013] In one embodiment, both the folding ring and the cone are integrally molded from glass fiber, carbon fiber, aramid fiber, bamboo fiber, polypropylene, PEEK, aluminum alloy, or magnesium alloy.
[0014] In one embodiment, the protective mesh cover includes a central column, multiple annular ribs, and multiple linear ribs. The central column is positioned directly opposite the center of the cone. The multiple annular ribs are arranged sequentially and spaced apart from the inside to the outside, surrounding the central column. The multiple linear ribs are arranged circumferentially spaced along the central column. Each linear rib extends radially along the central column and is sequentially connected to the multiple annular ribs from the inside to the outside. The outermost annular rib extends outward to form a mounting edge, which is mounted on the outer edge of the outer shell.
[0015] In one embodiment, a channel is formed between any two adjacent annular ribs, the channel extending through the protective mesh cover in a direction close to the diaphragm, the channel comprising a first segment and a second segment, the first segment and the second segment being radially offset along the central column, and the end of the first segment facing the diaphragm communicating with the end of the second segment away from the diaphragm.
[0016] In one embodiment, in any two adjacent annular ribs, one of the annular ribs is a "T" shaped rib and the other is an "inverted T" shaped rib. The interval between the two projection areas formed by the projection of any two adjacent annular ribs onto a projection plane along the first direction is B. The dimension of the connection between the first segment and the second segment along the first direction is D, where 0.1mm≤B≤0.7mm and 0.5mm≤D≤2mm.
[0017] This utility model also proposes a vehicle-mounted device, which uses the warning speaker described above.
[0018] The warning loudspeaker incorporates a one-piece molding design for the surround and cone, making the cone easier to manufacture. This eliminates assembly steps and errors associated with assembly between the surround and cone, and also allows for a lighter, thinner surround material with a more sensitive response. Furthermore, the absence of seams or adhesive joints between the cone and surround avoids energy loss during cone vibration, improving cone vibration consistency and resulting in smoother high-frequency extension.
[0019] The integrated design of the surround and cone, along with the downward-concave multi-wave surround, not only reduces the volume of the front cavity but also improves fatigue resistance. This avoids stress concentration on the cone near the surround, significantly improving the segmented vibration generated during cone vibration. Consequently, it prevents the mid-frequency range of the speaker's frequency response curve, especially the 3kHz to 4kHz range, from exhibiting a trough phenomenon, thus enhancing acoustic performance. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0021] Figure 1 This is a cross-sectional schematic diagram of the warning loudspeaker of the first method in the background art; Figure 2 Finite element method (FEM) simulation frequency response curve for a warning loudspeaker; Figure 3 This is an assembly diagram of the warning speaker of this utility model; Figure 4 This is a cross-sectional schematic diagram of the warning speaker of this utility model; Figure 5 for Figure 4 Enlarged view of region A in the middle; Figure 6 This is a cross-sectional view of an exploded view of a portion of the structure of the warning speaker of this utility model.
[0022] Background technical labeling explanation: 100' Warning speaker; 20' Protective mesh cover; 30' Sound cone; 32' Surround; 40' Front cavity.
[0023] This application includes an explanation of the icon symbols: 100. Warning speaker; 10. Housing; 11. Opening; 12. Bracket; 13. Basket; 14. Mounting cavity; 20. Protective mesh cover; 21. Protected area; 22. Mounting area; 23. Central column; 24. Annular rib; 241. Horizontal section; 242. Vertical section; 25. Linear rib; 26. Channel; 261. First section; 262. Second section; 30. Cone; 31. Cone body; 32. Surround; 321. Wave-shaped unit; 321a. Crest; 321b. Trough; 322. Inner side; 323. Outer side; 40. Front cavity; 50. Magnetic circuit system; 60. Centering support; 70. Voice coil.
[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0028] Warning speakers, such as AVAS (Acoustic Vehicle Alerting System) speakers, are active sound devices typically installed in vehicles, such as electric vehicles or hybrid vehicles. They are designed to alert pedestrians, especially visually impaired individuals, to the approach of a vehicle by simulating engine sounds or specific warning sounds, thus compensating for the safety hazard of insufficient noise when electric vehicles or hybrid vehicles are traveling at low speeds.
[0029] Currently, warning speakers mainly have the following two design methods: like Figure 1 As shown, the first method involves designing the protective mesh 20' of the warning speaker 100' as a concave cone structure, referencing the cone 30', and matching it with a single corrugated surround 32' protruding towards the protective mesh 20', as... Figure 1As shown. With this design, the protective mesh 20' can form a positive-gain resonance in the front cavity 40', improving the mid-frequency valley phenomenon caused by the segmented vibration of the folded ring 32', and obtaining an effective frequency response curve in the 0.3kHz~6kHz frequency band, as shown. Figure 2 The red curve shown in the finite element simulation indicates good acoustic performance. However, this type of warning speaker 100' requires the protective mesh cover 20' to be designed as a concave cone structure facing the cone 30', which is inconvenient to manufacture and has high manufacturing costs.
[0030] The second approach involves designing the warning speaker's protective grille as a flat plate, complemented by a single corrugated surround that protrudes upwards from the grille. While this simplifies the grille's structure, makes it easier to manufacture, and reduces production costs, this design results in a large front cavity volume. During cone vibration, stress is concentrated near the surround on the cone, making it prone to segmented vibration. This leads to a dip in the mid-frequency response of the speaker, particularly between 3kHz and 4kHz, resulting in poor acoustic performance. Figure 2 The blue curve shown is from the finite element simulation.
[0031] Furthermore, existing warning loudspeakers typically employ a separate cone and surround design, with the surround being a single-corrugated surround protruding towards the protective grille. The surround is bonded to the cone, creating a seam between them. However, this seam or bonding area often leads to energy loss during cone vibration, resulting in poor vibration consistency and consequently, poor high-frequency extension. Moreover, the separate cone and surround design requires assembly, which is inconvenient to manufacture and prone to assembly errors.
[0032] Although some warning loudspeakers use an integrated design of the surround and cone, the surround in this integrated design must be made of the same material as the cone. Since the cone material is usually lighter, the surround material is also lighter and thinner. Although a thinner surround is more sensitive, it is prone to insufficient fatigue strength, causing stress concentration on the cone near the surround. This can easily lead to segmented vibration during vibration, affecting acoustic performance.
[0033] This utility model proposes a warning speaker and vehicle-mounted device that can solve the related problems of the aforementioned warning speakers.
[0034] like Figures 3 to 6As shown, the warning loudspeaker 100 includes a housing 10, a protective mesh cover 20, and a cone 30. The protective mesh cover 20 is fitted onto the housing 10 and forms a mounting cavity 14 with the housing 10. Specifically, one end of the housing 10 along a first direction is open 11, and the protective mesh cover 20 is installed on the end of the housing 10 where the open 11 is located and covers the open 11. The cone 30 is located inside the mounting cavity 14 and forms a front cavity 40 between itself and the protective mesh cover 20. The vibration direction of the cone 30 is the first direction. The cone 30 includes a cone 31 and a folded ring 32 located on the outer edge of the cone 31, wherein the folded ring 32 is integrally formed with the cone 31. Specifically, the folding ring 32 is located close to the protective mesh cover 20 and surrounds the cone 31. The inner side 322 of the folding ring 32 is connected to the outer edge of the cone 31, and the outer side 323 of the folding ring 32 is connected to the outer shell 10, thereby realizing the assembly between the cone 30 and the outer shell 10.
[0035] The fold ring 32 is recessed in the direction away from the protective net cover 20, and the fold ring 32 forms a plurality of wave-shaped units 321 bent along the first direction from the inside to the outside. The distances between the wave-shaped units 321, the inner side 322 of the fold ring 32, the outer side 323 of the fold ring 32 and the protective net cover 20 along the first direction are the first distance, the second distance and the third distance, respectively. The first distance is not less than the second distance and the third distance.
[0036] The warning speaker 100 of this utility model can be an AVAS warning speaker 100, used for installation on electric vehicles and hybrid vehicles, etc., to warn pedestrians. The first direction is... Figure 4 The vertical direction shown is also vertical. The diaphragm 30 vibrates in the vertical direction to drive the air to produce sound.
[0037] Specifically, such as Figure 4 As shown, the upper end of the outer casing 10 is open 11. The protective mesh cover 20 is mounted on the upper end of the outer casing 10 and covers the open 11, thus covering the outside of the open 11 to protect the internal structure of the outer casing 10, such as the speaker cone 30, from damage. Furthermore, the protective mesh cover 20 has a mesh structure to ensure normal sound output.
[0038] Compared to the separate design of the cone 31 and the surround 32 of the diaphragm 30, the diaphragm 30 of the warning loudspeaker 100 of this utility model has the cone 31 and the surround 32 of the diaphragm 30 integrally formed. This not only makes it easier to manufacture and eliminates assembly steps and assembly errors, but also avoids the energy loss caused by the vibration of the diaphragm 30 during the vibration process due to the absence of seams or adhesives between the cone 31 and the surround 32. This improves the vibration consistency of the diaphragm 30 and makes the high frequency extension smoother.
[0039] Furthermore, the fold 32 is recessed in the direction away from the protective mesh cover 20, that is, the fold 32 is recessed downwards, not protruding upwards. Understandably, the downward recessed design of the fold 32 means that the bending trend of the fold 32 from its inner edge 322 and outer edge 323 is downwards. Moreover, the fold 32 forms multiple wavy units 321 that bend in the vertical direction sequentially from the inside to the outside, that is, the fold 32 is a multi-wavy fold 32. Furthermore, the aforementioned first spacing is not less than the second and third spacings. That is, the vertical spacing between each wave-shaped unit 321 and the protective mesh cover 20 is not greater than the vertical spacing between the inner side 322 and the outer side 323 of the folded ring 32 and the protective mesh cover 20. This ensures that the wave-shaped unit 321 does not protrude beyond the inner side 322 and the outer side 323 of the folded ring 32, and does not occupy the space above the inner side 322 and the outer side 323. As a result, the protective mesh cover 20 can be designed to be as close as possible to the folded ring 32, without reserving space for the upward protrusion of the folded ring 32. Only the displacement of the folded ring 32 in vertical vibration needs to be guaranteed, so as to minimize the volume of the front cavity 40. At the same time, the folded ring 32 and the cone 31 are designed as a single unit. The folded ring 32 can be made of the same material as the cone 31. The material density of the cone 31 is usually lighter, which makes the material density of the folded ring 32 lighter, the folded ring 32 thinner, and the more sensitive response. To avoid insufficient fatigue strength due to the thinner surround 32, the warning speaker 100 of this invention adopts a multi-wave surround 32 design. Compared with a single-wave surround, the multiple wave-shaped units 321 in the multi-wave surround 32 disperse stress, improve fatigue strength, and avoid stress concentration on the cone 31 near the surround 32. This significantly improves the segmented vibration generated during the vibration of the cone 30, thereby avoiding the occurrence of a trough in the mid-frequency part of the speaker's frequency response curve, especially in the 3kHz~4kHz range, and improving acoustic performance.
[0040] In the first embodiment, the protective mesh cover 20 can be designed as a conical structure recessed towards the cone 30, in conjunction with a multi-corrugated folded ring 32 recessed in the direction away from the protective mesh cover 20. This allows the protective mesh cover 20 to be extremely close to the folded ring 32, resulting in a very small front cavity 40. The protective mesh cover 20 can form a positive resonance in the front cavity 40. Furthermore, the multiple wave-shaped units 321 in the multi-corrugated folded ring 32 disperse stress, improve fatigue resistance, and avoid stress concentration on the cone 31 near the folded ring 32. This significantly improves the mid-frequency valley phenomenon caused by the segmented vibration of the folded ring 32, thereby enhancing acoustic performance.
[0041] In the second embodiment, the protective mesh cover 20 is flat and is fitted with a multi-corrugated folded ring 32 recessed in the direction away from the protective mesh cover 20. This allows the protective mesh cover 20 to get as close as possible to the folded ring 32. The front cavity 40 has a small volume, and the protective mesh cover 20 can form a positive resonance in the front cavity 40. In addition, the multiple wave-shaped units 321 in the multi-corrugated folded ring 32 disperse the stress, improve the fatigue strength, avoid the stress concentration on the cone 31 near the folded ring 32, greatly improve the mid-frequency valley phenomenon caused by the segmented vibration of the folded ring 32, and improve the acoustic performance.
[0042] It should be noted that, compared with the second embodiment, in the first embodiment, the protective mesh cover 20 is designed as a concave cone structure facing the diaphragm 30, which is closer to the diaphragm 30. The front cavity 40 is smaller, and the protective mesh cover 20 forms a better positive resonance effect in the front cavity 40, resulting in better acoustic performance.
[0043] Compared to the first embodiment, the protective mesh cover 20 in the second embodiment is flat, which simplifies the structure of the protective mesh cover 20 while ensuring optimized acoustic performance, making it easier to manufacture and reducing manufacturing costs.
[0044] In this invention, the warning loudspeaker 100 integrates the surround 32 and the cone 31 into a single unit, making the cone 30 easier to manufacture. This eliminates assembly steps and errors associated with the surround 32 and cone 31, and also reduces the material density of the surround 32, resulting in a thinner surround 32 and more sensitive response. Furthermore, the absence of seams or adhesive joints between the cone 31 and surround 32 avoids energy loss during cone 30 vibration, improving the vibration consistency of the cone 30 and resulting in smoother high-frequency extension.
[0045] While the surround 32 and the cone 31 are integrally formed, the multi-corrugated surround 32, which is recessed downwards, not only reduces the volume of the front cavity 40, but also improves the fatigue strength and avoids stress concentration on the cone 31 near the surround 32. This significantly improves the segmented vibration generated during the vibration of the cone 30, thereby avoiding the occurrence of a trough in the mid-frequency part of the speaker's frequency response curve, especially in the 3kHz~4kHz range, and improving acoustic performance.
[0046] In order to simplify the structure of the protective mesh cover 20 while ensuring optimized acoustic performance, making it easier to manufacture and reducing manufacturing costs, this utility model can choose to adopt the flat design of the protective mesh cover 20 in the second embodiment.
[0047] In the second embodiment, the protective mesh cover 20 is configured as a flat plate, and the multi-corrugated pleats 32, which are recessed downwards, can achieve the same effect as... Figure 1 The first type of warning speaker 100' shown has a frequency response curve that is close to or the same as the previous type, such as obtaining a relatively smooth frequency response curve in the 0.3kHz~6kHz frequency range, such as Figure 2 The red curve shown in the finite element simulation indicates good acoustic performance. However, compared to the warning speaker 100' of the first type, the protective mesh cover 20 of the warning speaker 100 of this utility model is flat, which simplifies the structure of the protective mesh cover 20, makes it easier to manufacture, and reduces manufacturing costs.
[0048] In one embodiment, the protective mesh cover 20 is flat and includes a protective area 21 and an installation area 22. The installation area 22 surrounds the protective area 21 and is installed on the outer edge of the outer shell 10. The protective area 21 forms a protective plane P on the side facing the cone 30. The folded ring 32 is disposed at a position corresponding to the protective plane near the installation area 22. The first spacing, the second spacing, and the third spacing are the spacings along the first direction between the wave-shaped unit 321, the inner side 322, and the outer side 323 and the protective plane, respectively.
[0049] like Figure 4 As shown, the mounting area 22 of the protective mesh cover 20 surrounds the outside of the protective area 21. The mounting area 22 is the edge of the protective mesh cover 20 and is installed on the edge of the outer shell 10 to achieve the assembly of the protective mesh cover 20 and the outer shell 10. The protective area 21 faces the cone 30, forming a protective plane P on the lower side. The folded ring 32 surrounds the edge of the cone 31 and is positioned near the mounting area 22, corresponding to the protective plane. The first spacing is the vertical spacing between the wavy unit 321 and the protective plane P, the second spacing is the vertical spacing between the inner side 322 and the protective plane P, and the third spacing is the vertical spacing between the outer side 323 and the protective plane P. The first spacing is not less than the second and third spacings to ensure that the wavy unit 321 of the folded ring 32 does not protrude upward from the inner side 322 and the outer side 323, avoiding occupying the space above the inner side 322 and the outer side 323. This allows the protective mesh cover 20 to be designed as close to the folded ring 32 as possible to minimize the volume of the front cavity 40. The structural design is reasonable and ingenious.
[0050] In one embodiment, the folded ring 32 is alternately provided with crests 321a and troughs 321b from the inside out. Both crests 321a and troughs 321b are wave-shaped units 321. The apex of all crests 321a is located on the first reference plane M, wherein the first reference plane M is parallel to the protective plane P. It can be understood that the first reference plane M and the protective plane P being parallel means that the first reference plane M is parallel or substantially parallel to the protective plane P.
[0051] like Figure 4 and Figure 5As shown, the folded ring 32 is alternately provided with peaks 321a and troughs 321b from the inside out, and there can be multiple peaks 321a and troughs 321b. Understandably, the folded ring 32 is a cosine curve, with peaks 321a being convex arcs formed by the cosine curve bending upwards from the horizontal axis (0 line), and troughs 321b being concave arcs formed by the cosine curve bending downwards from the horizontal axis. The wave-shaped units 321 near the inner edge 322 and near the outer edge 323 of the folded ring 32 can all be concave downwards to match the downward concave trend of the entire folded ring 32.
[0052] When there are multiple wave crests 321a, the vertices of all wave crests 321a are located on the first reference plane M. Understandably, the first reference plane M is a plane parallel or substantially parallel to the protective plane P. Having all the vertices of wave crests 321a located on the first reference plane M ensures that the initial distance between the vertices of all wave crests 321a and the protective plane P is equal, and that all the vertices of wave crests 321a are at the same height. This not only facilitates manufacturing and reduces processing difficulty, but also further unifies load distribution, reduces stress concentration, reduces nonlinear distortion, and improves acoustic performance.
[0053] Furthermore, the first spacing formed between the apex of each wave crest 321a and the protective plane P along the first direction is the first sub-spacing, and the inner side 322 and the outer side 323 are both located on the first reference plane M, so that each first sub-spacing, second spacing and third spacing are equal.
[0054] The inner edge 322, the outer edge 323, and the tops of all wave crests 321a are all located on the first reference plane M, making the heights of the inner edge 322, the outer edge 323, and all wave crests 321a consistent. Understandably, the height of a wave crest 321a is the vertical distance from the zero line to its apex. The first sub-spacing, the second spacing, and the third spacing are all vertical spacings between the first reference plane M and the protective plane P, and all three are equal. Each wave crest 321a of the folded ring 32 neither protrudes upwards from the inner edge 322 and the outer edge 323 nor is it recessed downwards from the inner edge 322 and the outer edge 323, further facilitating manufacturing, reducing stress concentration, and improving acoustic performance.
[0055] In one embodiment, the first spacing formed between the bottom point of each trough 321b and the protective plane P along the first direction is the second sub-spacing. The bottom points of all troughs 321b are located on the second reference plane N, so that all the second sub-spacings are equal, and all the wave-shaped units 321 have the same size along the first direction. The second reference plane N and the protective plane P are parallel to each other. It can be understood that the second reference plane N and the protective plane P being parallel to each other means that the second reference plane N and the protective plane P are parallel or substantially parallel.
[0056] like Figure 4 and Figure 5As shown, the folded ring 32 includes two troughs 321b and one crest 321a. The bottom points of all troughs 321b are located on the second reference plane N, making the bottom points of all troughs 321b at the same height, thus ensuring that the vertical distance between the bottom points of all troughs 321b and the protective plane P is equal. Since the apexes of all crests 321a are at the same height, and the bottom points of all troughs 321b are at the same height, the vertical dimensions of all wave-shaped units 321 are consistent. Understandably, the vertical dimension of a crest 321a can be its height, and the number of troughs 321b can be their depth. The depth of a trough 321b is the vertical distance from the zero line to its bottom point. The consistency of the height of each crest 321a and the depth of each trough 321b further facilitates manufacturing, reduces processing difficulty, further unifies load distribution, reduces stress concentration, reduces nonlinear distortion, and improves acoustic performance.
[0057] like Figure 5 As shown, in one embodiment, the first sub-spacing is L, where 1.3mm ≤ L ≤ 2mm. That is, the vertical spacing between the apex of all wave crests 321a and the protective plane P is 1.3mm to 2mm, making the vertical spacing between the protective mesh cover 20 and the apex of the wave crests 321a very small. This design minimizes the volume of the front cavity 40 by bringing the protective mesh cover 20 as close as possible to the folded ring 32. Furthermore, the first sub-spacing L can be twice the displacement Xmax of the vertical vibration of the folded ring 32, ensuring that the folded ring 32 has sufficient displacement and does not hinder the normal vibration of the folded ring 32. In a preferred embodiment, L = 1.3mm, making the protective mesh cover 20 as close as possible to the folded ring 32.
[0058] In one embodiment, all the wavy units 321 have the same size along a second direction, wherein the second direction is the direction from the inside to the outside of the fold 32.
[0059] The second direction is the direction from the inside to the outside of the fold 32, which is... Figure 4 The left-right or horizontal direction is shown. The dimension of the wavy element 321 along the second direction is the width of the wavy element 321. All wavy elements 321 have the same dimension along the second direction, that is, all wavy elements 321 have the same width. This not only facilitates manufacturing and reduces processing difficulty, but also further unifies load distribution and reduces stress concentration. Furthermore, the wavy elements 321 with consistent width ensure uniform distribution of the equivalent mass and stiffness of the structure, avoid local modal concentration areas, achieve dispersed consumption of resonant energy, and avoid nonlinear damping abrupt changes in alternating width and narrow regions. Understandably, the width of the crest 321a is the lateral distance of its convex arc on the 0 line, and the width of the trough 321b is the lateral distance of its concave arc on the 0 line.
[0060] In one embodiment, all wavy elements 321 are arc-shaped elements, and all wavy elements 321 have the same curvature. For example... Figure 4 and Figure 5 As shown, along the inner to outer direction of the folded ring 32, any two adjacent wave-shaped units 321 are connected by an arc-shaped transition, and the curvature of all wave-shaped units 321 is equal. That is, the arc radius R formed at the apex of each wave crest 321a is equal to the arc radius R formed at the bottom of each wave trough 321b. This ensures the uniformity of distribution and structural consistency among all wave-shaped units 321, resulting in a reasonable structural design, eliminating stress concentration, enhancing resistance to plastic deformation, extending service life, and facilitating uniform dissipation of vibration energy, as well as enhancing nonlinear damping. The value of R can be flexibly set according to actual usage requirements.
[0061] In the warning speaker 100 of this utility model, the folding ring 32 and the cone 31 are both integrally molded from glass fiber, carbon fiber, aramid fiber, bamboo fiber, polypropylene, PEEK, aluminum alloy or magnesium alloy, which provides high flexibility in selection and is easy to source and manufacture.
[0062] In the preferred embodiment, both the surround 32 and the cone 31 are integrally molded from glass fiber. Glass fiber has excellent tensile strength and rigidity, which can effectively resist the deformation of the cone 30 during high-speed vibration, reduce split vibration, and improve the clarity of mid-to-high frequencies. Furthermore, compared with the cone 30 made of traditional paper or metal materials, the glass fiber cone 30 has a lower density, reducing the weight of the cone 30, making the loudspeaker easier to drive, with faster transient response and higher loudness.
[0063] In one embodiment, the protective mesh cover 20 includes a central column 23, multiple annular ribs 24, and multiple linear ribs 25. The central column 23 is directly opposite the center of the cone 31. The multiple annular ribs 24 are arranged sequentially from the inside to the outside and surround the central column 23. The multiple linear ribs 25 are arranged circumferentially along the central column 23. Each linear rib 25 extends radially along the central column 23 and is connected to the multiple annular ribs 24 sequentially from the inside to the outside. The outermost annular rib 24 extends outward to form an installation edge, which is installed on the outer edge of the outer shell 10.
[0064] like Figures 3 to 6As shown, the protective mesh cover 20 is a flat grid-type mesh cover, specifically including a central column 23, multiple annular ribs 24, and multiple linear ribs 25. The central column 23 is directly opposite the center of the cone 31. The multiple annular ribs 24 are arranged sequentially around the central column 23 from the inside out. The innermost annular rib 24 is fitted onto and connected to the central column 23. The multiple linear ribs 25 are spaced apart circumferentially along the central column 23, and each linear rib 25 extends radially along the central column 23 to connect the multiple annular ribs 24 sequentially from the inside out, thus assembling the protective mesh cover 20. The outermost annular rib 24 extends outward to form a mounting edge, which is installed on the outer edge of the outer shell 10, enabling the assembly of the protective mesh cover 20 with the outer shell 10. Designing the protective mesh cover 20 as a flat grid-type mesh cover provides protection while ensuring normal sound transmission.
[0065] In one embodiment, a channel 26 is formed between any two adjacent annular ribs 24. The channel 26 passes through the protective mesh cover 20 in the direction close to the diaphragm 30. The channel 26 includes a first segment 261 and a second segment 262. The first segment 261 and the second segment 262 are radially offset along the central column 23, and the end of the first segment 261 facing the diaphragm 30 is connected to the end of the second segment 262 away from the diaphragm 30.
[0066] like Figure 5 As shown, the channel 26 formed between any two adjacent annular reinforcing bars 24 penetrates the protective mesh cover 20 in the vertical direction. The channel 26 is not a straight channel, but a segmented irregular channel, specifically including a first segment 261 and a second segment 262. The first segment 261 and the second segment 262 are radially offset along the central column 23, that is, offset to the left and right. The first segment 261 is located above the second segment 262, and the lower end of the first segment 261 and the upper end of the second segment 262 are connected to each other. Designing the channel 26 as a segmented irregular channel prevents external sand, gravel, and debris from directly entering the outer shell 10 through the channel 26, thus blocking external sand, gravel, and debris and protecting the internal structure of the outer shell 10 from damage.
[0067] In one embodiment, in any two adjacent annular ribs 24, one annular rib 24 is a "T" shaped rib and the other annular rib 24 is an "inverted T" shaped rib. The interval between the two projection areas formed by any two adjacent annular ribs 24 projected onto a projection plane along the first direction is B. The dimension of the connection between the first segment 261 and the second segment 262 along the first direction is D, where 0.1mm≤B≤0.7mm and 0.5mm≤D≤2mm.
[0068] like Figure 5As shown, the segmented irregular design of channel 26 is achieved through the cooperation of "T"-shaped ribs and "inverted T"-shaped ribs, so that the first segment 261 and the second segment 262 of channel 26 are staggered to the left and right, which can block external sand, gravel and debris. The structural design is ingenious and reasonable.
[0069] Furthermore, any two adjacent annular ribs 24 are projected onto a projection plane along the first direction, i.e., along the vertical direction, and the interval between the two corresponding projection areas is B, and the dimension along the first direction at the connection between the first segment 261 and the second segment 262 is D. Understandably, B is the horizontal distance between the outer edge of the inner annular rib 24 and the inner edge of the outer annular rib 24 among any two adjacent annular ribs 24. Both the "T"-shaped rib and the "inverted T"-shaped rib include a horizontal portion 241 and a vertical portion 242, and D is the vertical distance between the horizontal portion 241 of the "T"-shaped rib and the horizontal portion 241 of the "inverted T"-shaped rib.
[0070] In one embodiment, 0.1mm≤B≤0.7mm and 0.5mm≤D≤2mm are used to ensure that the channel 26 can output sound normally while making it narrower by using a segmented irregular shape design, so as to better block the entry of external sand, gravel and debris, and thus improve the protection performance.
[0071] In one embodiment, the dimension of the protective mesh cover 20 along the first direction, i.e., the vertical height along the first direction, is H, wherein 4mm≤H≤8mm, to ensure sufficient strength and improve the reliability of protection.
[0072] In the preferred embodiment, B=0.3mm, D=1mm, H=5mm, which is easy to manufacture and provides better protection.
[0073] like Figure 4 As shown, the warning loudspeaker 100 includes a magnetic circuit system 50, a centering support 60, and a voice coil 70 located in the mounting cavity 14. The cone 30, the centering support 60, and the voice coil 70 form the vibration system of the warning loudspeaker 100. The housing 10 includes a frame 13 and a bracket 12 mounted on the frame 13. The outer edge of the protective mesh cover 20 is mounted on the outer edge of the bracket 12. The upper end of the voice coil 70 is connected to the cone 30, and the lower end extends into the magnetic circuit system 50 to form a magnetic gap. The inner side of the centering support 60 is connected to the voice coil 70. The housing 10 is connected to the bracket 12.
[0074] During operation, the voice coil 70 of the warning loudspeaker 100 vibrates in the first direction, that is, in the vertical direction, which in turn drives the cone 30 to vibrate in the vertical direction, thereby inducing air to produce sound and completing the energy conversion between electroacoustics. The centering support 60 restricts the radial displacement of the voice coil 70 to ensure its axial linear vibration.
[0075] This utility model also proposes a vehicle-mounted device, which uses the warning speaker 100 as described above.
[0076] In one embodiment, the vehicle-mounted device may be a horn device used in vehicles such as electric vehicles and hybrid vehicles. The specific structure and usage of the warning speaker 100 in this vehicle-mounted device are the same as those in the above embodiments. Since this vehicle-mounted device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.
[0077] The above are merely preferred embodiments of this utility model and do not limit the scope of protection of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.
Claims
1. A warning loudspeaker, characterized in that, The warning speaker includes: shell; A protective mesh cover is provided on the outer shell and forms an installation cavity with the outer shell; A cone, located within the mounting cavity and forming a front cavity with the protective mesh cover, the vibration direction of the cone being a first direction; the cone includes a cone body and a folded ring located at the outer edge of the cone body, the folded ring being integrally formed with the cone body; The folded ring is recessed in the direction away from the protective mesh cover, and the folded ring forms a plurality of wavy units from the inside to the outside. The distances between the wavy units, the inner side of the folded ring, the outer side of the folded ring and the protective mesh cover along the first direction are the first distance, the second distance and the third distance, respectively, wherein the first distance is not less than the second distance and the third distance.
2. The warning speaker as described in claim 1, characterized in that, The protective mesh cover is flat and includes a protective area and an installation area. The installation area surrounds the protective area and is installed on the outer edge of the outer shell. The protective area forms a protective plane on the side facing the cone. The folded ring is positioned near the installation area corresponding to the protective plane. The first spacing, the second spacing, and the third spacing are the spacings along the first direction between the wavy unit, the inner side, and the outer side and the protective plane, respectively.
3. The warning speaker as described in claim 2, characterized in that, The folded ring is alternately provided with crests and troughs from the inside to the outside. The crests and troughs are all wave-shaped units. The apex of all the crests is located on a first reference plane, wherein the first reference plane is parallel to the protective plane.
4. The warning speaker as described in claim 3, characterized in that, The first spacing formed between the apex of each wave crest and the protective plane along the first direction is the first sub-spacing. The inner side and the outer side are both located on the first reference plane, so that each of the first sub-spacings, the second spacing and the third spacing are equal.
5. The warning speaker as described in claim 4, characterized in that, The first spacing formed between the bottom point of each trough and the protective plane along the first direction is the second sub-spacing. The bottom points of all the troughs are located on the second reference plane so that all the second sub-spacings are equal and all the wave-shaped units have the same size along the first direction. The second reference plane is parallel to the protective plane.
6. The warning speaker as described in claim 4, characterized in that, The first sub-spacing is L, where 1.3mm ≤ L ≤ 2mm.
7. The warning loudspeaker as described in any one of claims 1 to 6, characterized in that, All the wave-shaped units have the same size along the second direction, wherein the second direction is the direction from the inside to the outside of the fold; And / or, All of the wave-shaped units are arc-shaped units, and all of the wave-shaped units have the same curvature.
8. The warning speaker as described in any one of claims 1 to 6, characterized in that, Both the folding ring and the cone are integrally molded from glass fiber, carbon fiber, aramid fiber, bamboo fiber, polypropylene, PEEK, aluminum alloy, or magnesium alloy.
9. The warning loudspeaker as described in any one of claims 1 to 6, characterized in that, The protective mesh cover includes a central column, multiple annular ribs, and multiple linear ribs. The central column is positioned directly opposite the center of the cone. The multiple annular ribs are arranged sequentially and spaced apart from the inside to the outside, surrounding the central column. The multiple linear ribs are arranged circumferentially spaced along the central column. Each linear rib extends radially along the central column and is sequentially connected to the multiple annular ribs from the inside to the outside. The outermost annular rib extends outward to form a mounting edge, which is mounted on the outer edge of the outer shell.
10. The warning speaker as described in claim 9, characterized in that, A channel is formed between any two adjacent annular ribs. The channel passes through the protective mesh cover in the direction close to the diaphragm. The channel includes a first segment and a second segment. The first segment and the second segment are radially offset along the central column, and the end of the first segment facing the diaphragm is connected to the end of the second segment away from the diaphragm.
11. The warning speaker as claimed in claim 10, characterized in that, In any two adjacent annular ribs, one of the annular ribs is a "T" shaped rib and the other is an "inverted T" shaped rib. The interval between the two projection areas formed by the projection of any two adjacent annular ribs onto a projection plane along the first direction is B. The dimension of the connection between the first segment and the second segment along the first direction is D. Wherein, 0.1mm≤B≤0.7mm and 0.5mm≤D≤2mm.
12. A vehicle-mounted device, characterized in that, The vehicle-mounted equipment is equipped with a warning speaker as described in any one of claims 1 to 11.