A new energy vehicle warning sound device

Abstract

This utility model discloses a new energy vehicle warning sound device, which includes a shell, a faceplate, a rear shell, a tweeter unit, a woofer unit, and a filter. The tweeter unit and the woofer unit move on the same axis. The tweeter unit is suspended on the faceplate, and the sound output direction is consistent with the vehicle's driving direction. The woofer diameter of the woofer unit is D100-250mm, and the tweeter diameter of the tweeter unit is in the range of 10-60mm. The new energy vehicle warning sound device provided by this utility model has a woofer frequency of 100Hz~5000Hz in the woofer unit and a tweeter frequency of 2000Hz~10000Hz in the tweeter unit. The second-order filter has a signal frequency less than 2000Hz. In application, it can replace traditional high and low frequency electric horns, thereby increasing functionality, reducing vehicle parts, lowering costs, and improving economic efficiency.

Description

Technical Field

[0001] This utility model relates to a new energy vehicle equipment technology, and in particular to a new energy vehicle warning sound device. Background Technology

[0002] The current drawback of several new energy vehicle audio alert systems (AVAS) used in the automotive industry is that their frequency range is set between 200-5000Hz, resulting in an incomplete range of external sound and limited functionality. Figure 2 The frequency response curve of AVAS from a certain car company shows that its sound pressure level (SPL) range (1m 1W test) is 85~90dB in the 200~5000H range, which is narrow; the sound produced is a single frequency sound. Two speakers are needed to achieve the two frequencies of 450 or 550Hz. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the aforementioned technologies by providing a new energy vehicle warning sound device that combines a 100~10000Hz external sound-emitting device with a horn high-frequency sound pressure level of over 105dB at 1800~4000Hz.

[0004] To achieve the above objectives, this utility model provides a new energy vehicle warning sound device. It includes a housing, a faceplate, a rear shell, a tweeter unit, a woofer unit, and a filter. The tweeter unit and the woofer unit move along the same axis. The tweeter unit is suspended on the faceplate, and the sound output direction is consistent with the vehicle's driving direction. The woofer unit has a woofer diameter of D100-250mm, and the tweeter unit has a tweeter diameter in the range of 10-60mm. The woofer unit has a frequency of 100Hz~5000Hz. The tweeter unit has a frequency of 2000Hz~10000Hz. The filter filters out signals with frequencies less than 2000Hz from the tweeter unit. The woofer unit includes a bass diaphragm, which is a sound-producing diaphragm composed of rubber and rigid materials with a thickness of 0.1~0.5mm. The tweeter unit includes a tweeter diaphragm, which is a sound-producing diaphragm made of a single material with a thickness of 0.1~0.5mm.

[0005] The tweeter unit includes a horn with an angle ranging from 60 to 160 degrees.

[0006] The vibration direction of the tweeter diaphragm of the tweeter unit is the same as that of the woofer, and it is placed on the mask within a 200mm radius of the woofer.

[0007] The mask is a grid, through which the sound from the bass speaker radiates. The grid prevents water from splashing directly onto the diaphragm when the vehicle is wading through water.

[0008] The bass speaker unit includes a bass diaphragm ring bonded to the bass diaphragm, which is attached to the outer shell and forms a closed cavity with the rear shell.

[0009] The tweeter unit also includes a tweeter bracket, a tweeter throat, and a feedback cover, wherein the tweeter diaphragm is attached to the tweeter bracket and forms a sound cavity with the tweeter throat, feedback cover, and horn.

[0010] This invention provides a new energy vehicle warning sound device with a system frequency range of 100Hz~10000Hz. Within the 1 / 3 octave bands of 2 kHz, 2.5 kHz, and 3.15 kHz, this invention employs a tweeter and a woofer combined with a filter to form an external sound-emitting device with a frequency range of 100~10000Hz. The tweeter of the external sound-emitting device can achieve a sound pressure level of over 105dB at 1800~4000Hz. Tested at a distance of 2M, it meets the requirements of GB15742-2019 3.1.2 Sound Pressure Level © M and N class automotive horns should be no less than 105dB(A) and no more than 118dB(A) at a test distance of 2M. This invention replaces traditional high and low frequency electric horns, increasing functionality, reducing vehicle parts, lowering costs, and achieving economic benefits. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the new energy vehicle warning sound device assembly of this utility model;

[0012] Figure 2 This is the frequency response diagram of a traditional new energy vehicle warning device assembly.

[0013] Figure 3 This is the frequency response spectrum of the device of this utility model;

[0014] Figure 4 This is a cross-sectional view of the grid of the mask 13;

[0015] Figure 5 This is a schematic diagram showing the tweeter unit fixed in the middle of the faceplate 13;

[0016] Figure 6 This is a schematic diagram showing the position of the tweeter unit fixed around the perimeter of the faceplate 13;

[0017] Figure 7 This is a schematic diagram of a filter.

[0018] The components include: woofer unit A, tweeter unit B, voice coil 1, woofer diaphragm 2, woofer diaphragm surround 3, housing 4, rear housing 5, centering support 6, dust cap 7, tweeter voice coil 8, tweeter diaphragm 9, feedback cover 10, acoustic cavity 11, filter C12, face mask 13, sealed cavity 14, tweeter bracket 15, tweeter throat tube 16, horn 17, and tweeter sealed cavity 18. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example 1.

[0021] like Figure 1As shown in the illustration, this embodiment describes a new energy vehicle warning sound device, which includes a housing 4, a faceplate 13, a rear shell 5, a tweeter unit B, a woofer unit A, and a filter C12. The tweeter unit B and the woofer unit A move along the same axis. The tweeter unit B is suspended on the faceplate 13, and the sound output direction is consistent with the vehicle's driving direction. The woofer unit A has a woofer diameter of D100-250mm, and the tweeter unit B has a tweeter diameter in the range of 10-60mm. The woofer unit A has a bass resonator... The frequency range of the amplifier is 100Hz~5000Hz; the tweeter frequency of the tweeter unit B is 2000Hz~10000Hz; the filter C12 filters out signals with frequencies less than 2000Hz in the tweeter unit B; the woofer unit A includes a woofer diaphragm 2, which is a sound-producing diaphragm composed of rubber and rigid materials, with a thickness of 0.1~0.5mm; the tweeter unit B includes a tweeter diaphragm 9, which is a sound-producing diaphragm made of a single material, with a thickness of 0.1~0.5mm. In the woofer unit A, a woofer diaphragm ring 3 is bonded to the woofer diaphragm 2, and the woofer diaphragm 2 is attached to the outer shell 4 through the woofer diaphragm ring 3, forming a closed cavity 14 with the rear shell 5. In the woofer structure A, current passing through the voice coil 1 generates a magnetic field, which interacts with the constant magnetic field generated by the permanent magnet inside the speaker to produce a force F1. This causes the voice coil 1 to move like a piston in the magnetic field. The voice coil 1 is connected to the woofer diaphragm 2 and the woofer diaphragm surround 3. The movement of the voice coil 1 drives the woofer diaphragm 2 to vibrate, and the vibration pushes the surrounding air to generate sound waves. To meet the requirement of pushing more air volume and longer sound wave wavelength to achieve a low-frequency extension of 100Hz, the woofer diaphragm surround 3 is made of 0.2-0.5mm soft rubber material, while the woofer diaphragm 2 is made of rigid material. The woofer diaphragm surround 3 is fixed to the outer shell 4 and forms a sealed cavity 14 with the rear shell 5 to meet the waterproof requirements of the vehicle's external devices. Since the woofer diaphragm surround 3 is made of soft rubber and is easy to move and deflect, the woofer diaphragm 2 and the voice coil 1 are fixed by an elastic centering support 6 to keep the voice coil 1 moving linearly in the magnetic gap. A dust cap 7 is installed on the voice coil 1.

[0022] like Figure 1As shown, the tweeter unit B includes a horn 17 with an angle ranging from 60 to 160 degrees; the tweeter diaphragm 9 of the tweeter unit B vibrates in the same direction as the woofer, and is positioned on the woofer's center and a 200mm perimeter of the cover 13; in the tweeter unit B, The current passing through the tweeter voice coil 8 generates a magnetic field, which interacts with the constant magnetic field generated by the permanent magnet inside the tweeter, producing a force F2. This causes the tweeter voice coil 8 to move like a piston in the magnetic field. The tweeter voice coil 8 is bonded to the tweeter diaphragm 9. The tweeter voice coil 8 drives the tweeter diaphragm 9 to vibrate, and the vibration of the surrounding air generates sound waves. To meet the high sound pressure level of 2000-10000Hz, the wavelength of the audio signal is shorter, and the piston vibration speed is faster. The tweeter diaphragm 9 is made of a single piece of material with higher rigidity and is molded into an M-shape or semi-circle around the bonded periphery of the tweeter voice coil 8. To improve efficiency and reduce size, the tweeter B also includes a tweeter bracket 15, a tweeter throat 16, and a feedback cover 10. The tweeter diaphragm 9 is attached to the tweeter bracket 15 and to the tweeter throat 16. The feedback cover 10 and the horn 17 form a sound cavity 11. Compressed air is pushed within the dotted-line sound cavity 11 to generate sound. The shape of the sound cavity 11 is designed to meet the frequency and sound pressure requirements of 2000-10000 Hz. The mask 13 is a grid, through which the subwoofer radiates sound. The grid prevents water from splashing directly onto the diaphragm when the vehicle is wading through water.

[0023] Filter C12 is a filter that consists of a capacitor and a resettable fuse soldered onto the PCB. Figure 7 The schematic diagram of the filter shows that filter C12 is connected in series with the tweeter and in parallel with the terminals of the woofer. The value of the capacitor is calculated based on the nominal impedance R of the tweeter and the desired frequency (Hz). Figure 3 The diagram shows the frequency response spectrum. This structure effectively utilizes the low-frequency curve of the woofer, while the tweeter meets the requirements of vehicle alarms. In the 1 / 3 octave band of 2 kHz, 2.5 kHz and 3.15 kHz, the A-weighted SPL (sound pressure level) measured under analog signal conditions must not be less than 105 dB at a distance of 2 m.

[0024] Figure 3 The blue curve a represents the frequency response curve of a single woofer; the orange curve b represents the frequency response curve of a single tweeter; and the black curve c represents the frequency response curve of a speaker system consisting of a filter, tweeter, and woofer.

[0025] exist Figure 7 In the calculation formula for capacitor C, f is the frequency unit (Hz) and R is the nominal impedance unit (Ω). The capacitor frequency division calculation is based on the principle of a first-order high-pass filter, and the formula is: C = 1 / (2πfR).

[0026] like Figure 4 As shown, the tweeter is fixed to the woofer's cover 13, and can be used as follows: Figure 5 It can be fixed in the middle of the subwoofer's cover 13, or it can be like this. Figure 6 As shown, it is fixed at the position of the dotted line around the woofer's mask 13, without affecting the realization of the 100~10000Hz range of the frequency response curve.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A new energy vehicle alert sound device, comprising a housing (4), a faceplate (13), a rear shell (5), a tweeter unit (B), a woofer unit (A), and a filter (C12), characterized in that: The tweeter unit (B) and the woofer unit (A) move on the same axis. The tweeter unit (B) is suspended on the mask (13), and the sound output direction is consistent with the vehicle's driving direction. The woofer diameter of the woofer unit (A) is D100-250mm, and the tweeter diameter of the tweeter unit (B) is in the range of 10-60mm. The woofer frequency of the woofer unit (A) is 100Hz~5000Hz. The tweeter of the tweeter unit (B) has a high frequency of D100-250mm. The frequency of the speaker is between 2000Hz and 10000Hz; the filter (C12) will filter out signals with a frequency less than 2000Hz in the tweeter unit (B); the woofer unit (A) includes a woofer diaphragm (2), which is a sound-producing diaphragm made of rubber and hard materials with a thickness of 0.1 to 0.5mm; the tweeter unit (B) includes a tweeter diaphragm (9), which is a sound-producing diaphragm made of a single material with a thickness of 0.1 to 0.5mm.

2. The new energy vehicle prompt sound device according to claim 1, characterized in that The tweeter unit (B) includes a horn (17) with an angle in the range of 60 to 160 degrees.

3. The new energy vehicle prompt sound device according to claim 1, characterized in that The vibration direction of the tweeter diaphragm (9) of the tweeter unit (B) is the same as that of the woofer, and it is placed on the mask (13) within a 200mm radius of the woofer.

4. The new energy vehicle prompt sound device according to claim 1, characterized in that The mask (13) is a grid, and the sound of the bass speaker is radiated through the grid.

5. The new energy vehicle prompt sound device according to claim 1, characterized in that The bass speaker unit (A) has a bass diaphragm ring (3) bonded to the bass diaphragm (2). The bass diaphragm (2) is attached to the outer shell (4) through the bass diaphragm ring (3) and forms a closed cavity (14) with the rear shell (5).

6. The new energy vehicle prompt sound device according to claim 1, characterized in that The tweeter unit (B) also includes a tweeter bracket (15), a tweeter throat tube (16), and a feedback cover (10), wherein the tweeter diaphragm (9) is attached to the tweeter bracket (15) and forms a sound cavity (11) with the tweeter throat tube (16), the feedback cover (10), and the horn (17).

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