High-sensitivity loudspeaker

Abstract

The utility model provides a high-sensitivity loudspeaker which comprises a shell, a loudspeaker installed in the shell, a rear cover and a front cover, the rear cover and the front cover cover the outer side of the loudspeaker, and a plurality of inner ring sound transmission holes and a plurality of outer ring sound transmission holes are formed in the front cover in a penetrating mode. The plurality of inner ring sound transmission holes and the plurality of outer ring sound transmission holes are distributed in a circumferential array at equal intervals around the central axis of the front shaft; the distance between every two adjacent inner ring sound transmission holes in the annular direction is larger than the distance between every two adjacent outer ring sound transmission holes in the annular direction. Sound wave reflecting plates are arranged at the positions, at the inner ring sound transmission holes and the outer ring sound transmission holes, of the front cover. According to the application, the modulation of a specific path enables the sensitivity of the loudspeaker to be improved at 500-8000Hz, the requirement of designing a whistling loudspeaker of an electric vehicle is met, and meanwhile, the design requirements of low-speed warning tone warning and alarming are also met.

Description

Technical Field

[0001] This application relates to the field of vehicle-mounted pedestrian warning device technology, and in particular to a high-sensitivity loudspeaker. Background Technology

[0002] For new energy electric vehicles, since they lack a combustion engine, the noise level is low when the car is traveling at low speeds, making it difficult for pedestrians to detect their presence. Therefore, electric vehicles must be equipped with pedestrian warning devices that alert pedestrians at low speeds. However, because these external pedestrian warning devices are directly exposed to the outside of the vehicle, they typically consist of a protective casing and a speaker, requiring low sensitivity, especially for the mid-frequency range suitable for humans. Their functionality is also limited, leaving room for optimization and improvement. Utility Model Content

[0003] To address the issue of weak mid-frequency sensitivity in existing vehicle loudspeakers, this application provides a high-sensitivity loudspeaker.

[0004] The high-sensitivity loudspeaker provided in this application adopts the following technical solution:

[0005] A high-sensitivity loudspeaker includes a housing, a loudspeaker mounted in the housing, and a rear cover and a front cover covering the outside of the loudspeaker. The front cover has a plurality of inner ring sound-transmitting holes and a plurality of outer ring sound-transmitting holes. The plurality of inner ring sound-transmitting holes and the plurality of outer ring sound-transmitting holes are arranged in an equally spaced circular array around the central axis of the front shaft. The distance between two adjacent inner ring sound-transmitting holes is greater than the distance between two adjacent outer ring sound-transmitting holes.

[0006] The front cover is equipped with sound wave reflectors at both the inner and outer sound-permeable holes.

[0007] Furthermore, both the inner and outer ring sound-permeable holes are arranged in two sets along the radial direction of the front cover. An inner ring bridge-shaped water baffle is provided between two radially adjacent inner ring sound-permeable holes, and the inner ring bridge-shaped water baffle blocks the two radially adjacent inner ring sound-permeable holes from the air. An outer ring bridge-shaped water baffle is provided between two radially adjacent outer ring sound-permeable holes, and the outer ring bridge-shaped water baffle blocks the two radially adjacent outer ring sound-permeable holes from the air.

[0008] Furthermore, the sound wave reflector is disposed on the side of the inner ring sound-permeable hole opposite to the inner ring bridge-shaped water-blocking plate or on the side of the outer ring sound-permeable hole opposite to the outer ring bridge-shaped water-blocking plate.

[0009] Furthermore, the inner ring bridge-shaped water baffle is provided with sound guiding slopes on both sides near the two adjacent inner ring sound-permeable holes, and the outer ring bridge-shaped water baffle is provided with sound guiding slopes on both sides near the two adjacent outer ring sound-permeable holes.

[0010] Furthermore, the inner ring bridge-shaped water baffle is provided with multiple inner ring sound-permeable holes that are arranged in a ring, and the outer ring bridge-shaped water baffle is an integral ring.

[0011] Furthermore, the front cover has multiple symmetrically arranged drainage and ventilation holes at its center and edges.

[0012] Furthermore, the upper periphery of the housing is fixedly connected with multiple upper tenons, and the periphery of the front cover is fixedly connected with multiple upper tenon seats that correspond one-to-one with and are engaged with the multiple upper tenons.

[0013] Furthermore, the upper end face of the housing is provided with an upper recessed platform, and the lower end face of the front cover is integrally formed with an upper protruding edge that fits into the upper recessed platform.

[0014] Furthermore, the lower periphery of the housing is fixedly connected with multiple lower tenons, and the periphery of the rear cover is fixedly connected with multiple lower tenon seats that correspond one-to-one with and are engaged with the multiple lower tenons.

[0015] Furthermore, a recessed platform is provided on the lower end face of the housing, and a lower protruding edge that fits into the recessed platform is integrally formed on the upper end face of the rear cover.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] When the speaker is working, the sound wave airflow is modulated outward by four sets of sound-permeable holes on the front cover. Under the modulation of the four sets of sound-permeable holes (two inner rings and two outer rings), the sound waves passing through each set of sound-permeable holes are further modulated by the sound oscillation diffusion reflection space formed between the sound wave reflector, the inner ring bridge-shaped water baffle, and the sound-guiding inclined surface on the outer ring bridge-shaped water baffle. The modulation of this specific path improves the speaker's sensitivity in the 500-8000Hz range, specifically in the range of 90-110dB, which is within the useful range of 1800-3550Hz. This meets the design requirements for electric vehicle horn horns, as well as the design requirements for low-speed warning and alarm sounds, achieving the goal of integrating three functions. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an exploded view of the overall structure of an embodiment of this application;

[0020] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application;

[0021] Figure 3 This is a top view of the overall structure of an embodiment of this application;

[0022] Figure 4 This is a cross-sectional view of the front cover according to an embodiment of this application;

[0023] Figure 5 This is a sample sensitivity detection diagram from an embodiment of this application.

[0024] Figure label:

[0025] 1. Shell;

[0026] 2. Loudspeaker; 21. Diaphragm; 22. Spider and voice coil assembly; 23. Magnetic circuit assembly;

[0027] 3. Back cover;

[0028] 4. Front cover; 41. Inner ring soundproof hole; 42. Outer ring soundproof hole; 43. Drainage and ventilation hole;

[0029] 5. Sound wave reflector;

[0030] 61. Inner ring bridge-shaped water-retaining plate; 62. Outer ring bridge-shaped water-retaining plate; 63. Sound-guiding slope;

[0031] 71. Upper tenon; 72. Upper tenon seat; 73. Lower tenon; 74. Lower tenon seat

[0032] 81. Upper recessed platform; 82. Upper raised edge; 83. Lower recessed platform; 84. Lower raised edge. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0034] Reference Figure 1 , Figure 2 and Figure 3 This application discloses a high-sensitivity loudspeaker, which includes a housing 1, a loudspeaker 2 installed in the housing 1, and a rear cover 3 and a front cover 4 covering the outside of the loudspeaker 2. The loudspeaker 2 includes a diaphragm 21, a spider and voice coil assembly 22, and a magnetic circuit assembly 23. The front cover 4 is in the shape of a "V" that matches the shape of the diaphragm 21.

[0035] The front cover 4 has multiple inner ring sound-permeable holes 41 and multiple outer ring sound-permeable holes 42. The multiple inner ring sound-permeable holes 41 and multiple outer ring sound-permeable holes 42 are distributed in a circumferential array with equal spacing along the central axis of the front axle. The distance between two adjacent inner ring sound-permeable holes 41 is greater than the distance between two adjacent outer ring sound-permeable holes 42. Specifically, the multiple inner ring sound-permeable holes 41 occupy 1 / 2 of the entire circle, and the multiple outer ring sound-permeable holes 42, except for the reinforcing ribs used for connection, occupy the entire circle.

[0036] Furthermore, referring to Figure 2 , Figure 3 and Figure 4 In a specific example, two sets of inner ring sound-permeable holes 41 and outer ring sound-permeable holes 42 are arranged radially along the front cover 4. An inner ring bridge-shaped baffle 61 is arranged between two radially adjacent inner ring sound-permeable holes 41, and the inner ring bridge-shaped baffle 61 blocks the two radially adjacent inner ring sound-permeable holes 41. An outer ring bridge-shaped baffle 62 is arranged between two radially adjacent outer ring sound-permeable holes 42, and the outer ring bridge-shaped baffle 62 blocks the two radially adjacent outer ring sound-permeable holes 42. Multiple inner ring bridge-shaped baffles 61 are arranged, each corresponding to one of the multiple ring-shaped inner ring sound-permeable holes 41. The outer ring bridge-shaped baffles 62 are arranged in an integral ring shape.

[0037] In addition, the front cover 4 is equipped with sound wave reflectors 5 at both the inner ring sound-permeable hole 41 and the outer ring sound-permeable hole 42. The sound wave reflectors 5 are located on the side of the inner ring sound-permeable hole 41 away from the inner ring bridge-shaped water baffle 61 or on the side of the outer ring sound-permeable hole 42 away from the outer ring bridge-shaped water baffle 62. Furthermore, the inner ring bridge-shaped water baffle 61 is provided with sound-guiding slopes 63 on both sides near the two adjacent inner ring sound-permeable holes 41, and the outer ring bridge-shaped water baffle 62 is provided with sound-guiding slopes 63 on both sides near the two adjacent outer ring sound-permeable holes 42.

[0038] Thus, when the speaker 2 operates, the spider and voice coil assembly 22 in the speaker 2 will generate axial vibration within the magnetic circuit assembly 23, causing the diaphragm 21 to vibrate together. The V-shaped cavity of the diaphragm 21 matches the front cover 4, and the vibrating sound wave airflow is modulated outward by the four sets of sound transmission holes on the front cover 4. Under the modulation of the four sets of sound transmission holes (two sets of inner ring sound transmission holes 41 and two sets of outer ring sound transmission holes 42), the sound waves passing through each set of sound transmission holes are further modulated by the sound oscillation diffusion reflection space formed between the sound wave reflector 5 and the sound guide slope 63 on the inner and outer ring bridge-shaped water baffles 61 and 62. The modulation of its specific path improves the sensitivity of the speaker 2 in the 500-8000Hz range, specifically in the range of 90-110dB. Figure 5As shown, the 1800-3550Hz range, which is useful to humans, is included, which meets the design requirements for electric vehicle horn horns, as well as the design requirements for low-speed warning sounds and alarms, achieving the goal of three functions in one.

[0039] In addition, the front cover 4 has multiple symmetrically arranged drainage and venting holes 43 at its center and edges. In a specific example, the front cover 4 has four drainage and venting holes 43 at its center and edges, which can be used for drainage and also to adjust the air resistance of the sound wave transmission path, so that the diaphragm 21 of the speaker 2 can vibrate normally to produce sound.

[0040] Meanwhile, to facilitate the assembly of this application, refer to Figure 1 The upper periphery of the housing 1 is fixed with multiple upper tenons 71, and the periphery of the front cover 4 is fixed with multiple upper tenon seats 72 that correspond one-to-one with and are engaged with the upper tenons 71. The upper end face of the housing 1 has an upper recessed platform 81, and the lower end face of the front cover 4 has an integrally formed upper protruding edge 82 that fits into the upper recessed platform 81. The upper recessed platform 81 and the upper protruding edge 82 provide positioning for the assembly of the front cover 4 and the housing 1, and provide a good waterproof sealing effect. The lower periphery of the housing 1 is fixed with multiple lower tenons 73, and the periphery of the rear cover 3 is fixed with multiple lower tenon seats 74 that correspond one-to-one with and are engaged with the lower tenons 73. The lower end face of the housing 1 has a lower recessed platform 83, and the upper end face of the rear cover 3 has an integrally formed lower protruding edge 84 that fits into the lower recessed platform 83. The lower recessed platform 83 and the lower protruding edge 84 provide positioning for the assembly of the rear cover 3 and the housing 1, and provide a good waterproof sealing effect.

[0041] The front cover 4 and the housing 1 can be easily assembled by the engagement of the upper tenon 71 and the upper tenon seat 72; the rear cover 3 and the housing 1 can be easily assembled by the engagement of the lower tenon 81 and the lower tenon seat 82.

[0042] The implementation principle of a high-sensitivity loudspeaker in this application embodiment is as follows:

[0043] When the speaker 2 is working, the spider and voice coil assembly 22 in the speaker 2 will generate axial vibration in the magnetic circuit assembly 23, which will cause the diaphragm 21 to vibrate together. The V-shaped cavity of the diaphragm 21 matches the front cover 4. The vibrating sound wave airflow is modulated by the four sets of sound transmission holes on the front cover 4 and emitted outward. Under the modulation of the four sets of sound transmission holes, namely the two sets of inner ring sound transmission holes 41 and the two sets of outer ring sound transmission holes 42, the sound waves passing through each set of sound transmission holes are further modulated by the sound oscillation diffusion reflection space formed between the sound wave reflector 5 and the inner ring bridge-shaped water baffle 61 and the outer ring bridge-shaped water baffle 62. The modulation of its specific path makes the sensitivity of the speaker 2 improved in the range of 500-8000Hz, specifically reflected in the sensitivity between 90-110dB, while the useful range of 1800-3550Hz is included, which meets the design requirements of electric vehicle horn, and also meets the design requirements of low speed warning sound and alarm, achieving the purpose of three functions in one.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-sensitivity loudspeaker, comprising a housing, a loudspeaker mounted in the housing, and a rear cover and a front cover covering the outside of the loudspeaker, characterized in that, The front cover has multiple inner ring sound-permeable holes and multiple outer ring sound-permeable holes. The multiple inner ring sound-permeable holes and multiple outer ring sound-permeable holes are distributed in a circumferential array with equal spacing around the central axis of the front cover. The distance between two adjacent inner ring sound-permeable holes is greater than the distance between two adjacent outer ring sound-permeable holes. The front cover is equipped with sound wave reflectors at both the inner and outer sound-permeable holes.

2. A high-sensitivity loudspeaker according to claim 1, characterized in that, Both the inner and outer ring sound-permeable holes are arranged in two sets along the radial direction of the front cover. An inner ring bridge-shaped water baffle is provided between two radially adjacent inner ring sound-permeable holes, and the inner ring bridge-shaped water baffle blocks the two radially adjacent inner ring sound-permeable holes from the air. An outer ring bridge-shaped water baffle is provided between two radially adjacent outer ring sound-permeable holes, and the outer ring bridge-shaped water baffle blocks the two radially adjacent outer ring sound-permeable holes from the air.

3. A high-sensitivity loudspeaker according to claim 2, characterized in that, The sound wave reflector is disposed on the side of the inner ring sound-permeable hole opposite to the inner ring bridge-shaped water-blocking plate, or disposed on the side of the outer ring sound-permeable hole opposite to the outer ring bridge-shaped water-blocking plate.

4. A high-sensitivity loudspeaker according to claim 2, characterized in that, The inner ring bridge-shaped water baffle is provided with sound guiding slopes on both sides near the two adjacent inner ring sound-permeable holes, and the outer ring bridge-shaped water baffle is provided with sound guiding slopes on both sides near the two adjacent outer ring sound-permeable holes.

5. A high-sensitivity loudspeaker according to claim 2, characterized in that, The inner ring of the bridge-shaped water baffle is provided with multiple inner ring sound-permeable holes that are arranged in a ring, and the outer ring of the bridge-shaped water baffle is an integral ring.

6. A high-sensitivity loudspeaker according to claim 1, characterized in that, The front cover has multiple symmetrically arranged drainage and ventilation holes at its center and edges.

7. A high-sensitivity loudspeaker according to claim 1, characterized in that, The upper periphery of the housing is fixedly connected with multiple upper tenons, and the periphery of the front cover is fixedly connected with multiple upper tenon seats that correspond one-to-one with and are engaged with the multiple upper tenons.

8. A high-sensitivity loudspeaker according to claim 7, characterized in that, The upper end face of the housing is provided with an upper recessed platform, and the lower end face of the front cover is integrally formed with an upper protruding edge that fits into the upper recessed platform.

9. A high-sensitivity loudspeaker according to claim 1, characterized in that, The lower end of the housing is fixedly connected to a plurality of lower tenons, and the rear cover is fixedly connected to a plurality of lower tenon seats that correspond one-to-one with and are engaged with the plurality of lower tenons.

10. A high-sensitivity loudspeaker according to claim 9, characterized in that, The lower end face of the housing is provided with a recessed platform, and the upper end face of the rear cover is integrally formed with a lower protruding edge that fits into the recessed platform.

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