Headrest assembly, seat, vehicle and noise reduction method of vehicle

Abstract

The invention discloses a headrest assembly, a seat, a vehicle and a noise reduction method of the vehicle, and the headrest assembly comprises a headrest body which is movably arranged above a backrest of the seat in the vertical direction; the loudspeaker is arranged on the pillow body; the error sensor is arranged on the pillow body, and the error sensor and the loudspeaker are located on the same side. According to the headrest assembly, the position of the headrest body can be adjusted in the vertical direction according to the head positions of different passengers on a seat or the head positions of the same passenger in different sitting postures, and therefore anti-noise signals sent by the loudspeaker on the headrest body can be effectively counteracted with noise received by the heads of the passengers; and an error sensor on the headrest body can accurately capture noise near the head of the passenger, it is guaranteed that the headrest assembly has a good noise reduction effect on different passengers or the same passenger in different sitting postures, and then the flexibility and compatibility of the headrest assembly are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a headrest assembly, a seat, a vehicle and a noise reduction method for the vehicle. Background Art

[0002] Vehicles generate noise when driving, which affects the ride comfort. To address this problem, many vehicles use active noise reduction technology, which cancels out the noise by sending out a signal opposite to the noise through a secondary speaker. However, the existing technology does not consider the difference in noise reduction effect of the active noise reduction system under different passengers or different sitting positions of passengers. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a headrest assembly, which has a good noise reduction effect for different passengers or the same passenger in different sitting postures.

[0004] The present invention also provides a seat, comprising the headrest assembly mentioned above.

[0005] The present invention also provides a vehicle, comprising the above-mentioned seat.

[0006] The present invention also provides a vehicle noise reduction method, which includes the above-mentioned vehicle.

[0007] The headrest assembly according to an embodiment of the present invention is used for a seat, and includes: a pillow body, which is movably arranged above the backrest of the seat in the up-down direction; a speaker, which is arranged on the pillow body; and an error sensor, which is arranged on the pillow body and is located on the same side as the speaker.

[0008] According to the headrest assembly of the embodiment of the present invention, the speaker is arranged on the pillow body, and the error sensor is arranged on the pillow body and is located on the same side as the speaker. The pillow body is movably arranged above the backrest of the seat in the up and down direction, so that the pillow body can adjust the position of the pillow body in the up and down direction according to the head position of different passengers on the seat or the head position of the same passenger in different sitting postures, so that the anti-noise signal emitted by the speaker on the pillow body can effectively offset the noise received by the passenger's head, and the error sensor on the pillow body can accurately capture the noise near the passenger's head, ensuring that the headrest assembly has a good noise reduction effect for different passengers or the same passenger in different sitting postures, thereby improving the flexibility and compatibility of the headrest assembly, so that the seat using the headrest assembly and the vehicle using the seat can be suitable for different passengers and usage scenarios.

[0009] In some embodiments of the present invention, the speakers are multiple and include a first secondary speaker and a second secondary speaker, the error sensors are multiple and include a first sub-error sensor and a second sub-error sensor, and along the left and right directions of the seat, the first secondary speaker and the second secondary speaker are symmetrically arranged on both sides of the pillow body, respectively, the first sub-error sensor is located on a side of the first secondary speaker away from the second secondary speaker, and the second sub-error sensor is located on a side of the second secondary speaker away from the first secondary speaker and is symmetrically arranged with respect to the first sub-error sensor.

[0010] In some embodiments of the present invention, along the left-right direction of the seat, a distance between a center point of the first secondary speaker and a center point of the second secondary speaker is a, wherein 230 mm ≤ a ≤ 250 mm.

[0011] In some embodiments of the present invention, the diameter of the end surface of the sound-emitting end of the first secondary speaker is 63.5mm-114.3mm; and / or, the diameter of the end surface of the sound-emitting end of the second secondary speaker is 63.5mm-114.3mm; and / or, the volume of the first secondary speaker is 0.5L-1.5L; and / or, the volume of the second secondary speaker is 0.5L-1.5L.

[0012] In some embodiments of the present invention, an angle between an extension direction of the first secondary speaker and an extension direction of the second secondary speaker is α, wherein 50°≤α≤70°.

[0013] In some embodiments of the present invention, the pillow body has a first mounting groove and a second mounting groove, the open mouth of the first mounting groove and the open mouth of the second mounting groove are open toward the front side of the seat, the first secondary speaker is located in the first mounting groove, and the second secondary speaker is located in the second mounting groove, along the extension direction of the first secondary speaker, the distance from the end face of the sound-emitting end of the first secondary speaker to the open mouth of the first mounting groove is b, and along the extension direction of the second secondary speaker, the distance from the end face of the sound-emitting end of the second secondary speaker to the open mouth of the second mounting groove is c, wherein b=c and 15mm≤b≤25mm; and / or, along the front-to-back direction of the seat, the distance from one end of the first secondary speaker facing the second secondary speaker to the open mouth of the first mounting groove is n, and the distance from one end of the second secondary speaker facing the first secondary speaker to the open mouth of the second mounting groove is m, wherein n=m and 25mm≤n≤35mm.

[0014] In some embodiments of the present invention, the first secondary speaker is one or a plurality of speakers arranged along the up-down direction, and the second secondary speaker is one or more speakers corresponding to the first secondary speaker.

[0015] In some embodiments of the present invention, along the up-down direction, a distance from a center point of the first sub-error sensor to a center point of the first secondary loudspeaker that is closest to the first sub-error sensor is d, where 60 mm≤d≤80 mm.

[0016] In some embodiments of the present invention, along the left-right direction of the seat, a distance from a center point of the first sub-error sensor to a center point of the second sub-error sensor is e, wherein 280 mm≤e≤320 mm.

[0017] In some embodiments of the present invention, the first sub-error sensor is one or a plurality of first sub-error sensors arranged along the up-down direction, and the second sub-error sensors are one or a plurality of second sub-error sensors corresponding to the first sub-error sensors.

[0018] In some embodiments of the present invention, the present invention further comprises: a photosensitive element, wherein the photosensitive element is disposed between the first secondary speaker and the second secondary speaker along the left-right direction of the seat, and the photosensitive element and the first secondary speaker are located at the same height along the up-down direction.

[0019] The seat according to the embodiment of the present invention comprises: a backrest; and the above-mentioned headrest assembly, wherein the pillow body is movably disposed above the backrest along the up-down direction.

[0020] According to the seat of the embodiment of the present invention, a headrest assembly is provided, a speaker is provided on the pillow body, and an error sensor is provided on the pillow body and is located on the same side as the speaker. The pillow body is movably provided above the backrest in the up and down directions, so that the pillow body can adjust the position of the pillow body in the up and down directions according to the head positions of different passengers on the seat or the head positions of the same passenger in different sitting postures, so that the anti-noise signal emitted by the speaker on the pillow body can effectively offset the noise received by the passenger's head, and the error sensor on the pillow body can accurately capture the noise near the passenger's head, thereby ensuring that the headrest assembly has a good noise reduction effect for different passengers or the same passenger in different sitting postures, thereby improving the flexibility and compatibility of the seat, so that the seat and the vehicle using the seat can be suitable for different passengers and usage scenarios.

[0021] In some embodiments of the present invention, the present invention further includes: a driving component, wherein the driving component is used to drive the pillow body to move along the up-down direction.

[0022] In some embodiments of the present invention, the driving assembly includes: a driving motor, which is arranged on the backrest; a transmission device, whose input end is connected to the output end of the driving motor, and whose output end is connected to the pillow body.

[0023] In some embodiments of the present invention, the transmission device includes: a gear connected to the output end of the drive motor; a rack guide extending along the up and down directions and meshing with the gear, and the rack guide is fixedly connected to the pillow body.

[0024] The vehicle according to the embodiment of the present invention comprises an active noise reduction system, wherein the speaker and the error sensor are connected to the active noise reduction system; and the above-mentioned seat.

[0025] According to the vehicle of the embodiment of the present invention, a seat is provided, a speaker is provided on a pillow body, an error sensor is provided on the pillow body and is located on the same side as the speaker, the speaker and the error sensor are connected to an active noise reduction system, and are movably provided above the backrest along the up-down direction through the pillow body, so that the position of the pillow body can be adjusted along the up-down direction according to the head position of different passengers on the seat or the head position of the same passenger in different sitting postures, so that the anti-noise signal emitted by the speaker on the pillow body can effectively offset the noise received by the passenger's head, and the error sensor on the pillow body can accurately capture the noise near the passenger's head, ensuring that the headrest assembly has a good noise reduction effect for different passengers or the same passenger in different sitting postures, thereby improving the flexibility and compatibility of the seat, so that the vehicle can be suitable for different passengers and usage scenarios.

[0026] The vehicle noise reduction method according to an embodiment of the present invention is used for the above-mentioned vehicle, and the noise reduction method includes: determining whether there is a passenger on the seat; judging whether the pillow body matches the passenger's head; if so, turning on the active noise reduction system; if not, adjusting the position of the pillow body along the up and down direction.

[0027] According to the noise reduction method for a vehicle in an embodiment of the present invention, the noise reduction method includes: determining that there is a passenger on the seat; judging whether the pillow body matches the passenger's head; if so, turning on the active noise reduction system; if not, adjusting the position of the pillow body in the up and down directions to achieve that the pillow body can match the heads of different passengers or the heads of the same passenger in different sitting positions, thereby ensuring that the headrest assembly has a good noise reduction effect for different passengers or the same passenger in different sitting positions, so that the noise reduction method for the vehicle can be suitable for different passengers and usage scenarios.

[0028] In some embodiments of the present invention, determining whether the pillow body matches the passenger's head includes: determining whether the passenger's head and the speaker are at the same height; if so, the pillow body matches the passenger's head; if not, the pillow body does not match the passenger's head.

[0029] In some embodiments of the present invention, the pillow body has a photosensitive element located at the same height as the speaker along the up-down direction, and determining whether the passenger's head is located at the same height as the speaker includes: determining whether the photosensitive element detects a light signal; if so, the passenger's head is not located at the same height as the speaker; if not, the passenger's head is located at the same height as the speaker.

[0030] In some embodiments of the present invention, the vehicle further includes an OMS system, the OMS system includes a camera for detecting the position of the passenger's ear, and the determining whether the passenger's head is at the same height as the speaker includes:

[0031] Obtain the position of the speaker in the vehicle, and obtain the ear position of the passenger through the camera; determine whether the ear position of the passenger is at the same height as the position of the speaker in the vehicle; if so, the head of the passenger is at the same height as the speaker; if not, the head of the passenger is not at the same height as the speaker.

[0032] In some embodiments of the present invention, the vehicle further includes a driving assembly for driving the headrest to move along the up-down direction, and adjusting the position of the headrest along the up-down direction includes: controlling the driving assembly to drive the headrest to move along the up-down direction.

[0033] In some embodiments of the present invention, the conditions for determining that there is a passenger on the seat include: satisfying at least one of the following: a pressure sensor detection value of the seat is greater than a preset pressure value, a seat belt signal of the vehicle is displayed as being fastened, and a camera of the OMS system of the vehicle detects that there is a passenger on the seat.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 is a schematic diagram of an application scenario of a headrest assembly according to an embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of another perspective of an application scenario of a headrest assembly according to an embodiment of the present invention

[0038] Figure 3 is a structural diagram of a headrest assembly and a rack guide rail according to an embodiment of the present invention;

[0039] Figure 4 is a schematic flow chart of a noise reduction method for a vehicle according to an embodiment of the present invention;

[0040] Figure 5 is a schematic flow chart of a vehicle noise reduction method according to another embodiment of the present invention;

[0041] Figure 6 is a schematic flow chart of a vehicle noise reduction method according to yet another embodiment of the present invention;

[0042] Figure 7 FIG. 4 is a flow chart of a noise reduction method for a vehicle according to another embodiment of the present invention.

[0043] Reference numerals:

[0044] 100. Headrest assembly;

[0045] 1. Pillow body; 11. First mounting slot; 12. Second mounting slot;

[0046] 2. Speaker; 21. First secondary speaker; 22. Second secondary speaker;

[0047] 3. Error sensor; 31. First sub-error sensor; 32. Second sub-error sensor;

[0048] 200. Rack guide rail. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] A headrest assembly 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0053] like Figure 1-Figure 3 As shown, a headrest assembly 100 according to an embodiment of the present invention is used for a seat, and the headrest assembly 100 includes a pillow body 1, a speaker 1, and an error sensor 3. The pillow body 1 is movably arranged above the backrest of the seat in the up-down direction, the speaker 2 is arranged on the pillow body 1, and the error sensor 3 is arranged on the pillow body 1 and is located on the same side as the speaker 2.

[0054] It can be understood that when a passenger sits in a seat and needs to turn on the active noise reduction system, the error sensor 3 on the pillow body 1 detects the noise signal near the passenger's head, converts the noise signal into an electrical signal and transmits it to the control unit of the active noise reduction system. The control unit receives the electrical signal and generates a corresponding anti-noise signal based on the electrical signal and transmits it to the speaker 2 on the pillow body 1. The speaker 2 converts the anti-noise signal into an anti-noise sound wave and releases it into the environment, so that the anti-noise sound wave and the original noise sound wave cancel each other out, thereby achieving the noise reduction effect of the headrest assembly 100.

[0055] At the same time, the pillow body 1 is movably arranged above the seat back in the up and down direction, so that the pillow body 1 can adjust the position of the pillow body 1 in the up and down direction according to the head positions of different passengers on the seat or the head positions of the same passenger in different sitting postures, so that the pillow body 1 matches the heads of different passengers or the heads of the same passenger in different sitting postures, so that the anti-noise signal emitted by the speaker 2 on the pillow body 1 can effectively offset the noise received by the passenger's head, and the error sensor 3 on the pillow body 1 can accurately capture the noise near the passenger's head, ensuring that the headrest assembly 100 has a good noise reduction effect for different passengers or the same passenger in different sitting postures, thereby improving the flexibility and compatibility of the headrest assembly 100, and effectively solving the problem of small effective noise reduction space of the seat using the headrest assembly 100, so that the vehicle using the seat can be suitable for different passengers and usage scenarios.

[0056] It should be noted that how to determine whether the pillow body 1 matches the passenger's head and how to adjust the position of the pillow body 1 in the up and down directions will be specifically described in subsequent embodiments.

[0057] According to the headrest assembly 100 of the embodiment of the present invention, the speaker 2 is arranged on the pillow body 1, and the error sensor 3 is arranged on the pillow body 1 and is located on the same side as the speaker 2. The pillow body 1 is movably arranged above the backrest of the seat in the up and down direction, so that the pillow body 1 can adjust the position of the pillow body 1 in the up and down direction according to the head positions of different passengers on the seat or the head positions of the same passenger in different sitting postures, so that the anti-noise signal emitted by the speaker 2 on the pillow body 1 can effectively offset the noise received by the passenger's head, and the error sensor 3 on the pillow body 1 can accurately capture the noise near the passenger's head, ensuring that the headrest assembly 100 has a good noise reduction effect for different passengers or the same passenger in different sitting postures, thereby improving the flexibility and compatibility of the headrest assembly 100, so that the seat using the headrest assembly 100 and the vehicle using the seat can be suitable for different passengers and usage scenarios.

[0058] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the speakers 2 are multiple and include a first secondary speaker 21 and a second secondary speaker 22, the error sensors 3 are multiple and include a first sub-error sensor 31 and a second sub-error sensor 32, and along the left and right directions of the seat, the first secondary speaker 21 and the second secondary speaker 22 are symmetrically arranged on both sides of the pillow body 1, respectively, the first sub-error sensor 31 is located on the side of the first secondary speaker 21 away from the second secondary speaker 22, and the second sub-error sensor 32 is located on the side of the second secondary speaker 22 away from the first secondary speaker 21 and is symmetrically arranged with the first sub-error sensor 31.

[0059] It can be understood that when a passenger sits on the seat, the passenger's head is located between the first secondary speaker 21 and the second secondary speaker 22 along the left and right directions of the seat. The symmetrically arranged first secondary speaker 21 and the second secondary speaker 22 can cover a wider auditory area, ensuring that the anti-noise signal emitted by the first secondary speaker 21 and the anti-noise signal emitted by the second secondary speaker 22 can be evenly distributed and maintained consistent on both sides of the passenger's head, thereby forming a more stable and uniform sound field on both sides of the head, thereby more effectively offsetting ambient noise and improving the noise reduction effect of the headrest assembly 100.

[0060] At the same time, along the left and right direction of the seat, the passenger's head is located between the first sub-error sensor 31 and the second sub-error sensor 32, so that the symmetrically arranged first sub-error sensor 31 and the second sub-error sensor 32 can more comprehensively capture the noise signals on both sides of the head. In addition, by locating the first sub-error sensor 31 on the side of the first secondary speaker 21 away from the second secondary speaker 22, and locating the second sub-error sensor 32 on the side of the second secondary speaker 22 away from the first secondary speaker 21, the first sub-error sensor 31 and the second sub-error sensor 32 can both capture a wider range of noise, and reduce direct interference from the passenger's head (such as head movement, breathing sound, etc.), improve the accuracy and reliability of the first sub-error sensor 31 and the second sub-error sensor 32 in capturing noise reduction, thereby improving the reliability of the noise reduction effect of the headrest assembly 100.

[0061] In some embodiments of the present invention, Figure 1-Figure 3 As shown, along the left-right direction of the seat, the distance between the center point of the first secondary speaker 21 and the center point of the second secondary speaker 22 is a, where 230 mm ≤ a ≤ 250 mm. It can be understood that along the left-right direction of the seat, in order to ensure that the passenger's head is located between the speaker 2 sound field of the first secondary speaker 21 and the speaker 2 sound field of the second secondary speaker 22, the distance between the center point of the first secondary speaker 21 and the center point of the second secondary speaker 22 is determined to be 230 mm-250 mm according to the 90% percentile adult head width in China, so as to ensure a good noise reduction effect of the headrest assembly 100.

[0062] It should be noted that the distance between the center point of the first secondary speaker 21 and the center point of the second secondary speaker 22 may be 230 mm, 235 mm, 240 mm, or 250 mm.

[0063] In some embodiments of the present invention, the diameter of the end surface of the sound-emitting end of the first secondary speaker 21 is 63.5 mm (2.5 inches)-114.3 mm (4.5 inches). It is understandable that if the diameter of the end surface of the sound-emitting end of the first secondary speaker 21 is too small, the low-frequency performance will be insufficient, and if the diameter of the end surface of the sound-emitting end of the first secondary speaker 21 is too large, it will occupy too much space of the pillow body 1 and increase the cost. Therefore, by limiting the diameter of the end surface of the sound-emitting end of the first secondary speaker 21 to 63.5 mm-114.3 mm, while ensuring a good noise reduction effect of the headrest assembly 100, the volume of the first secondary speaker 21 is reduced and the cost of the headrest assembly 100 is reduced.

[0064] It should be noted that the diameter of the end surface of the sound-emitting end of the first secondary speaker 21 may be 2.5 inches, 3 inches, 3.5 inches, 4 inches or 4.5 inches.

[0065] In some embodiments of the present invention, the diameter of the end surface of the sound-emitting end of the second secondary speaker 22 is 63.5 mm (2.5 inches)-114.3 mm (4.5 inches). It is understandable that if the diameter of the end surface of the sound-emitting end of the second secondary speaker 22 is too small, the low-frequency performance will be insufficient, and if the diameter of the end surface of the sound-emitting end of the second secondary speaker 22 is too large, it will occupy too much space of the pillow body 1 and increase the cost. Therefore, by limiting the diameter of the end surface of the sound-emitting end of the second secondary speaker 22 to 63.5 mm-114.3 mm, while ensuring a good noise reduction effect of the headrest assembly 100, the volume of the second secondary speaker 22 is reduced and the cost of the headrest assembly 100 is reduced.

[0066] It should be noted that the diameter of the end surface of the sound-emitting end of the second secondary speaker 22 may be 2.5 inches, 3 inches, 3.5 inches, 4 inches or 4.5 inches.

[0067] In some embodiments of the present invention, the volume of the first secondary speaker 21 is 0.5L-1.5L. It is understandable that if the volume of the first secondary speaker 21 is too small, the bass performance will be limited, and if the volume of the first secondary speaker 21 is too large, the headrest assembly 100 will be too bulky and may interfere with other spaces in the vehicle when used in the vehicle. Therefore, by limiting the volume of the first secondary speaker 21 to 0.5L-1.5L, while ensuring that the first secondary speaker 21 has sufficient bass dive, the volume and cost of the first secondary speaker 21 and the headrest assembly 100 are reduced. It should be noted that the volume of the first secondary speaker 21 can be 0.5L, 1L or 1.5L.

[0068] In some embodiments of the present invention, the volume of the second secondary speaker 22 is 0.5L-1.5L. It is understandable that if the volume of the second secondary speaker 22 is too small, the bass performance will be limited, while if the volume of the second secondary speaker 22 is too large, the headrest assembly 100 will be too bulky and may interfere with other spaces in the vehicle when used in the vehicle. Therefore, by limiting the volume of the second secondary speaker 22 to 0.5L-1.5L, while ensuring that the second secondary speaker 22 has sufficient bass dive, the volume and cost of the second secondary speaker 22 and the headrest assembly 100 are reduced. It should be noted that the volume of the second secondary speaker 22 can be 0.5L, 1L or 1.5L.

[0069] In some embodiments of the present invention, Figure 1-Figure 3As shown, the angle between the extension direction of the first secondary speaker 21 and the extension direction of the second secondary speaker 22 is α, where 50°≤α≤70°. It can be understood that according to a large number of experimental tests by the inventor, if the angle between the extension direction of the first secondary speaker 21 and the extension direction of the second secondary speaker 22 is too large, they will interfere with each other and affect the noise reduction effect, while if the angle between the extension direction of the first secondary speaker 21 and the extension direction of the second secondary speaker 22 is too small, the noise reduction field is easy to diverge, resulting in a decrease in the comfort perceived by the occupants. Therefore, by limiting the angle between the extension direction of the first secondary speaker 21 and the extension direction of the second secondary speaker 22 to 50°-70°, a good noise reduction effect of the headrest assembly 100 is guaranteed.

[0070] It should be noted that the angle between the extension direction of the first secondary speaker 21 and the extension direction of the second secondary speaker 22 may be 50°, 55°, 60°, 65°, or 70°.

[0071] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the pillow body 1 has a first mounting groove 11 and a second mounting groove 12, the open mouth of the first mounting groove 11 and the open mouth of the second mounting groove 12 are open toward the front side of the seat, the first secondary speaker 21 is located in the first mounting groove 11, and the second secondary speaker 22 is located in the second mounting groove 12, the distance from the sound-emitting end surface of the first secondary speaker 21 to the open mouth of the first mounting groove 11 is b, and the distance from the sound-emitting end surface of the second secondary speaker 22 to the open mouth of the second mounting groove 12 is c, wherein b=c and 15mm≤b≤25mm.

[0072] It can be understood that, since the angle between the extension direction of the first secondary speaker 21 and the extension direction of the second secondary speaker 22 is 50°-70°, if the distance from the end face of the sound-emitting end of the first secondary speaker 21 to the open mouth of the first mounting groove 11 is too small, the passenger may directly touch the end face of the sound-emitting end of the first secondary speaker 21 and cause abnormal noise, and if the distance from the end face of the sound-emitting end of the first secondary speaker 21 to the open mouth of the first mounting groove 11 is too large, it will affect the sound performance of the first secondary speaker 21. At the same time, if the distance from the end face of the sound-emitting end of the second secondary speaker 22 to the open mouth of the second mounting groove 12 is too small, the passenger may directly touch the end face of the sound-emitting end of the second secondary speaker 22 and cause abnormal noise, and if the distance from the end face of the sound-emitting end of the second secondary speaker 22 to the open mouth of the second mounting groove 12 is too large, it will affect the sound performance of the second secondary speaker 22.

[0073] Thus, by limiting the distance from the end surface of the sound-emitting end of the first secondary speaker 21 to the open opening of the first mounting groove 11 to be the same as the distance from the end surface of the sound-emitting end of the second secondary speaker 22 to the open opening of the second mounting groove 12, the first secondary speaker 21 and the second secondary speaker 22 are symmetrically arranged while ensuring the noise reduction effect of the headrest assembly 100. At the same time, by limiting the distance from the end surface of the sound-emitting end of the first secondary speaker 21 to the open opening of the first mounting groove 11 to 15 mm-25 mm, the noise reduction effect of the headrest assembly 100 is further improved.

[0074] It should be noted that the distance from the end surface of the sound-emitting end of the first secondary speaker 21 to the open opening of the first installation groove 11 can be 15 mm, 18 mm, 20 mm, 23 mm or 25 mm.

[0075] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the pillow body 1 has a first mounting groove 11 and a second mounting groove 12, the open mouth of the first mounting groove 11 and the open mouth of the second mounting groove 12 are open toward the front side of the seat, the first secondary speaker 21 is located in the first mounting groove 11, and the second secondary speaker 22 is located in the second mounting groove 12. Along the front-to-back direction of the seat, the distance from one end of the first secondary speaker 21 facing the second secondary speaker 22 to the open mouth of the first mounting groove 11 is n, and the distance from one end of the second secondary speaker 22 facing the first secondary speaker 21 to the open mouth of the second mounting groove 12 is m, wherein n=m and 25mm≤n≤35mm.

[0076] It can be understood that, since the angle between the extension direction of the first secondary speaker 21 and the extension direction of the second secondary speaker 22 is 50°-70°, if the distance from the end of the first secondary speaker 21 facing the second secondary speaker 22 to the open mouth of the first mounting groove 11 is too small, the passenger may directly touch the end surface of the sound-emitting end of the first secondary speaker 21 and cause abnormal noise, and if the distance from the end of the first secondary speaker 21 facing the second secondary speaker 22 to the open mouth of the first mounting groove 11 is too large, it will affect the sound performance of the first secondary speaker 21. At the same time, if the distance from the end of the second secondary speaker 22 facing the first secondary speaker 21 to the open mouth of the second mounting groove 12 is too small, the passenger may directly touch the end surface of the sound-emitting end of the second secondary speaker 22 and cause abnormal noise, and if the distance from the end of the second secondary speaker 22 facing the first secondary speaker 21 to the open mouth of the second mounting groove 12 is too large, it will affect the sound performance of the second secondary speaker 22.

[0077] Thus, by limiting the distance from the end of the first secondary speaker 21 facing the second secondary speaker 22 to the open opening of the first installation groove 11 to be the same as the distance from the end of the second secondary speaker 22 facing the first secondary speaker 21 to the open opening of the second installation groove 12, the first secondary speaker 21 and the second secondary speaker 22 are symmetrically arranged while ensuring the noise reduction effect of the headrest assembly 100. At the same time, by limiting the distance from the end of the first secondary speaker 21 facing the second secondary speaker 22 to the open opening of the first installation groove 11 to 25 mm-35 mm, the noise reduction effect of the headrest assembly 100 is further improved.

[0078] It should be noted that the distance from the end of the first secondary speaker 21 facing the second secondary speaker 22 to the open opening of the first installation groove 11 can be 25 mm, 28 mm, 30 mm, 33 mm or 35 mm.

[0079] In some embodiments of the present invention, the first secondary speaker 21 is one or a plurality of speakers arranged in the vertical direction, and the second secondary speaker 22 is one or a plurality of speakers corresponding to the first secondary speaker 21. Thus, the headrest assembly 100 is provided with versatility through such an arrangement, so as to adapt to seats and vehicles with different requirements and meet different requirements of passengers. Figure 1-Figure 3 As shown, there is one first secondary speaker 21 and one corresponding second secondary speaker 22; or, there are two first secondary speakers 21 and two corresponding second secondary speakers 22.

[0080] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the distance from the center point of the first sub-error sensor 31 to the center point of the nearest first secondary speaker 21 is d, where 60mm≤d≤80mm. It can be understood that if the distance from the center point of the first sub-error sensor 31 to the center point of the nearest first secondary speaker 21 is too large, the noise detected by the first sub-error sensor 31 will not be accurate enough, resulting in poor noise reduction effect, and if the distance from the center point of the first sub-error sensor 31 to the center point of the nearest first secondary speaker 21 is too small, the first sub-error sensor 31 will be polluted by the sound of the first secondary speaker 21, resulting in non-convergence of noise reduction. Therefore, by limiting the distance from the center point of the first sub-error sensor 31 to the center point of the nearest first secondary speaker 21 to 60mm-80mm, the accuracy of the noise detected by the first sub-error sensor 31 is effectively improved, thereby improving the noise reduction effect of the headrest assembly 100.

[0081] At the same time, since the first secondary speaker 21 and the second secondary speaker 22 are symmetrically arranged, and the first sub-error sensor 31 and the second sub-error sensor 32 are symmetrically arranged, by limiting the distance from the center point of the first sub-error sensor 31 to the nearest center point of the first secondary speaker 21 to 60mm-80mm, the distance from the center point of the second sub-error sensor 32 to the nearest center point of the third secondary speaker 2 is also limited to 60mm-80mm.

[0082] It should be noted that the distance from the center point of the first sub-error sensor 31 to the center point of the nearest first secondary loudspeaker 21 may be 60 mm, 65 mm, 70 mm, 75 mm or 80 mm.

[0083] In some embodiments of the present invention, Figure 1-Figure 3 As shown, along the left-right direction of the seat, the distance from the center point of the first sub-error sensor 31 to the center point of the second sub-error sensor 32 is e, where 280 mm ≤ e ≤ 320 mm. It can be understood that along the left-right direction of the seat, since the passenger's head is located between the first sub-error sensor 31 and the second sub-error sensor 32, the noise reduction effect of the passenger's two ears is ensured by limiting the distance from the center point of the first sub-error sensor 31 to the center point of the second sub-error sensor 32, and the noise reduction range covers the common human ear activity range. At the same time, the sound field is not too large to waste computing power, thereby reducing the cost while ensuring the noise reduction effect of the headrest assembly 100.

[0084] In some embodiments of the present invention, the first sub-error sensor 31 is one or a plurality of sub-error sensors arranged in the vertical direction, and the second sub-error sensor 32 is one or a plurality of sub-error sensors corresponding to the first sub-error sensor 31. Thus, the headrest assembly 100 is provided with universality through such an arrangement, so as to adapt to seats and vehicles with different requirements and meet different requirements of passengers. For example, Figure 1-Figure 3 As shown, there is one first sub-error sensor 31 and one corresponding second sub-error sensor 32; or, there are two first sub-error sensors 31 and two corresponding second sub-error sensors 32.

[0085] In some embodiments of the present invention, the headrest assembly 100 further includes a photosensitive element (not shown in the figure), which is disposed between the first secondary speaker 21 and the second secondary speaker 22 along the left-right direction of the seat, and is located at the same height as the first secondary speaker 21 along the up-down direction. It can be understood that the photosensitive element can be used to detect whether the passenger's head is at the same height as the speaker 2, and when the passenger's head is not at the same height as the speaker 2, the position of the pillow body 1 is adjusted along the up-down direction until the passenger's head is at the same height as the speaker 2, so that the anti-noise signal emitted by the speaker 2 can more directly and effectively offset the noise received by the passenger's head.

[0086] Specifically, when the photosensor detects a light signal, it means that the passenger's head is not at the same height as the speaker 2. At this time, the position of the pillow body 1 needs to be adjusted along the up and down directions until the photosensor does not detect a light signal, indicating that the passenger's head is at the same height as the speaker 2.

[0087] The following describes a seat according to an embodiment of the present invention.

[0088] According to the seat of the embodiment of the present invention, Figure 1-Figure 3 As shown, it includes a backrest and a headrest assembly 100, wherein the headrest assembly 100 includes a pillow body 1, a speaker 1, and an error sensor 3. The pillow body 1 is movably arranged above the backrest of the seat in the up-down direction, the speaker 2 is arranged on the pillow body 1, and the error sensor 3 is arranged on the pillow body 1 and is located on the same side as the speaker 2.

[0089] According to the seat of the embodiment of the present invention, a headrest assembly 100 is provided, a speaker 2 is provided on the pillow body 1, and an error sensor 3 is provided on the pillow body 1 and is located on the same side as the speaker 2. The pillow body 1 is movably provided above the backrest in the up-down direction, so that the pillow body 1 can adjust the position of the pillow body 1 in the up-down direction according to the head positions of different passengers on the seat or the head positions of the same passenger in different sitting postures, so that the anti-noise signal emitted by the speaker 2 on the pillow body 1 can effectively offset the noise received by the passenger's head, and the error sensor 3 on the pillow body 1 can accurately capture the noise near the passenger's head, thereby ensuring that the headrest assembly 100 has a good noise reduction effect for different passengers or the same passenger in different sitting postures, thereby improving the flexibility and compatibility of the seat, so that the seat and the vehicle using the seat can be suitable for different passengers and usage scenarios.

[0090] In some embodiments of the present invention, Figure 3 As shown, the seat further includes a driving assembly, which is used to drive the pillow body 1 to move in the up-down direction. Therefore, when the position of the pillow body 1 needs to be adjusted in the up-down direction, the driving assembly drives the pillow body 1 to move in the up-down direction to the required position. Specifically, when the passenger's head is not at the same height as the speaker 2, the driving assembly needs to drive the pillow body 1 to move in the up-down direction until the passenger's head and the speaker 2 are at the same height, thereby ensuring the noise reduction effect of the headrest assembly 100 on the passenger.

[0091] In some embodiments of the present invention, the driving assembly includes a driving motor and a transmission device. The driving motor is arranged on the backrest, the input end of the transmission device is connected to the output end of the driving motor, and the output end of the transmission device is connected to the pillow body 1. Thus, the torque output by the driving motor is converted into a linear driving force and transmitted to the pillow body 1 through the transmission device, so that the pillow body 1 can move in the up and down direction.

[0092] In some embodiments of the present invention, Figure 3 As shown, the transmission device includes a gear and a rack guide 200. The gear is connected to the output end of the driving motor, the rack guide 200 extends in the up-down direction and meshes with the gear, and the rack guide 200 is fixedly connected to the pillow body 1. Thus, the driving motor drives the gear to rotate, and the gear meshes with the rack guide 200, so that the moving rack guide 200 and the pillow body 1 fixedly connected to the rack guide 200 move linearly in the up-down direction to realize the movement of the pillow body 1 in the up-down direction. At the same time, the meshing cooperation between the gear and the rack guide 200 can efficiently convert the rotational torque into a linear driving force, reduce energy loss, and realize high-precision motion control, ensure the accuracy of the movement trajectory of the headrest in the up-down direction, and improve the overall reliability.

[0093] Furthermore, the rack rails 200 are multiple and spaced apart in the left-right direction, and the gears are multiple and correspond to the multiple rack rails 200 one by one, and the multiple gears are respectively connected to the output end of the driving motor. Thus, the multiple rack rails 200 move in the up-down direction at the same time to drive the pillow body 1 to move in the up-down direction, further ensuring that the pillow body 1 moves in the up-down direction more smoothly and accurately. For example, Figure 3 As shown, there are two rack guide rails 200 spaced apart in the left-right direction.

[0094] Next, a vehicle according to an embodiment of the present invention will be described.

[0095] The vehicle according to the embodiment of the present invention includes an active noise reduction system and a seat, wherein a speaker 2 and an error sensor 3 are connected to the active noise reduction system, the seat includes a backrest and a headrest assembly 100, the headrest assembly 100 includes a pillow body 1 and an active noise reduction system, the pillow body 1 is movably arranged above the backrest of the seat in the up-down direction, the speaker 2 is arranged on the pillow body 1, and the error sensor 3 is arranged on the pillow body 1 and is located on the same side as the speaker 2.

[0096] Therefore, when the active noise reduction system needs to be turned on, the error sensor 3 on the pillow body 1 detects the noise signal near the passenger's head, converts the noise signal into an electrical signal and transmits it to the control unit of the active noise reduction system. The control unit receives the electrical signal and generates a corresponding anti-noise signal based on the electrical signal and transmits it to the speaker 2 on the pillow body 1. The speaker 2 converts the anti-noise signal into an anti-noise sound wave and releases it into the environment, so that the anti-noise sound wave and the original noise sound wave cancel each other out to achieve noise reduction.

[0097] At the same time, the active noise reduction system also includes a reference sensor. Specifically, when it comes to engine active noise reduction (ENC), the reference sensor is used to extract the engine speed and convert it into an electrical signal and transmit it to the control unit; when it comes to road noise active noise reduction (RNC), the reference sensor is an acceleration sensor arranged on the chassis of the car and converts it into an electrical signal and transmits it to the control unit, thereby improving the noise reduction effect.

[0098] According to the vehicle of the embodiment of the present invention, a seat is provided, a speaker 2 is provided on the pillow body 1, an error sensor 3 is provided on the pillow body 1 and is located on the same side as the speaker 2, the speaker 2 and the error sensor 3 are connected to the active noise reduction system, and are movably provided above the backrest along the up and down direction through the pillow body 1, so that the pillow body 1 can adjust the position of the pillow body 1 along the up and down direction according to the head position of different passengers on the seat or the head position of the same passenger in different sitting postures, so that the anti-noise signal emitted by the speaker 2 on the pillow body 1 can effectively offset the noise received by the passenger's head, and the error sensor 3 on the pillow body 1 can accurately capture the noise near the passenger's head, ensuring that the headrest assembly 100 has a good noise reduction effect for different passengers or the same passenger in different sitting postures, thereby improving the flexibility and compatibility of the seat, so that the vehicle can be suitable for different passengers and usage scenarios.

[0099] The noise reduction method for a vehicle according to an embodiment of the present invention is described below.

[0100] According to the vehicle noise reduction method of the embodiment of the present invention, Figure 1-Figure 4 As shown, it is used in a vehicle. The vehicle includes a seat, the seat includes a backrest and a headrest assembly 100, the headrest assembly 100 includes a pillow body 1 and an active noise reduction system, the pillow body 1 is movably arranged above the backrest of the seat in the up-down direction, and the active noise reduction system includes a speaker 2 and an error sensor 3 arranged on the pillow body 1.

[0101] Vehicle noise reduction methods include:

[0102] Determine whether there is a passenger on the seat. It is understandable that after determining that there is a passenger on the seat through this step, the subsequent steps can determine whether the head of the passenger on the seat matches the pillow body 1. It should be noted that how to determine whether there is a passenger on the seat is specifically described in the subsequent embodiments.

[0103] Determine whether the pillow body 1 matches the passenger's head. Thus, after determining that there is a passenger on the seat, by determining whether the pillow body 1 matches the passenger's head, it is ensured that the headrest assembly 100 has a good noise reduction effect for different passengers or the same passenger in different sitting positions.

[0104] If yes, the active noise reduction system is turned on. Thus, after determining that the pillow body 1 matches the passenger's head, the active noise reduction system is turned on so that the anti-noise signal emitted by the speaker 2 on the pillow body 1 can offset the noise received by the passenger's head, and the error sensor 3 on the pillow body 1 can accurately capture the noise near the passenger's head, thereby achieving the noise reduction effect of the headrest assembly 100 on the passenger.

[0105] If not, adjust the position of the pillow body 1 in the up-down direction. It is understandable that after determining that the pillow body 1 does not match the passenger's head, adjust the position of the pillow body 1 in the up-down direction until the pillow body 1 matches the passenger's head, and then turn on the active noise reduction system. In this way, the position of the pillow body 1 can be adjusted in the up-down direction according to the head positions of different passengers on the seat or the head positions of the same passenger in different sitting positions, so that the pillow body 1 matches the heads of different passengers or the heads of the same passenger in different sitting positions, thereby achieving a good noise reduction effect of the headrest assembly 100 for different passengers or the same passenger in different sitting positions.

[0106] According to the noise reduction method for a vehicle in an embodiment of the present invention, the noise reduction method includes: determining that there is a passenger on the seat; judging whether the pillow body 1 matches the passenger's head; if so, turning on the active noise reduction system; if not, adjusting the position of the pillow body 1 in the up and down directions to achieve that the pillow body 1 can match the heads of different passengers or the heads of the same passenger in different sitting positions, thereby ensuring that the headrest assembly 100 has a good noise reduction effect for different passengers or the same passenger in different sitting positions, so that the noise reduction method for the vehicle can be suitable for different passengers and usage scenarios.

[0107] In some embodiments of the present invention, Figure 5 As shown, judging whether the pillow body 1 matches the passenger's head includes: judging whether the passenger's head is at the same height as the speaker 2. It can be understood that since the speaker 2 converts the anti-noise signal into an anti-noise sound wave and releases it into the environment so that the anti-noise sound wave and the original noise sound wave cancel each other out, thus, by judging whether the passenger's head is at the same height as the speaker 2 in this step, the anti-noise signal emitted by the speaker 2 can be more directly transmitted to the passenger, thereby improving the noise reduction effect.

[0108] If the pillow body 1 matches the passenger's head, the active noise reduction system is turned on so that the anti-noise signal emitted by the speaker 2 on the pillow body 1 can more directly offset the noise received by the passenger's head, thereby improving the noise reduction effect of the headrest assembly 100 on the passenger.

[0109] If not, the pillow body 1 does not match the passenger's head, then the position of the pillow body 1 is adjusted in the up and down direction until the passenger's head is at the same height as the speaker 2, and then the active noise reduction system is turned on. Thus, it is further ensured that the headrest assembly 100 has a good noise reduction effect for different passengers or the same passenger in different sitting positions.

[0110] In some embodiments of the present invention, Figure 6 As shown, the pillow body 1 has a photosensitive element at the same height as the speaker 2 in the vertical direction. It can be understood that whether the passenger's head is at the same height as the speaker 2 can be determined by whether the photosensitive element detects a light signal, thereby determining whether the pillow body 1 matches the passenger's head, thereby ensuring the noise reduction effect of the headrest assembly 100.

[0111] It should be noted that the photosensitive element can be integrated into a CCU (Central Control Unit), a ZCU (Zonal Control Unit) or controlled independently.

[0112] Specifically, judging whether the passenger's head is at the same height as the speaker 2 includes: judging whether the photosensitive element detects a light signal. Thus, by judging whether the passenger's head is at the same height as the speaker 2 in this step, it is judged whether the passenger's head is at the same height as the speaker 2, so that the anti-noise signal emitted by the speaker 2 can be more directly transmitted to the passenger, thereby improving the noise reduction effect.

[0113] If so, the passenger's head is not at the same height as the speaker 2. It is understandable that the information that the passenger's head blocks the photosensitive element is obtained by detecting the light signal through the photosensitive element, thereby determining that the passenger's head is not at the same height as the speaker 2, and determining that the pillow body 1 does not match the passenger's head, thus, the position of the pillow body 1 is adjusted in the up and down direction until the photosensitive element does not detect the light signal, and then the active noise reduction system is turned on, thereby ensuring that the headrest assembly 100 has a good noise reduction effect for different passengers or the same passenger in different sitting postures.

[0114] If not, the passenger's head is at the same height as the speaker 2. It is understandable that the information that the passenger's head blocks the photosensitive element is obtained by the fact that the photosensitive element does not detect the light signal, thereby determining that the passenger's head is at the same height as the speaker 2, and then determining that the pillow body 1 matches the passenger's head, thereby turning on the active noise reduction system so that the anti-noise signal emitted by the speaker 2 on the pillow body 1 can more directly offset the noise received by the passenger's head, thereby improving the noise reduction effect of the headrest assembly 100 on the passenger.

[0115] In some embodiments of the present invention, Figure 7As shown, the vehicle also includes an OMS system (Occupancy Monitoring System), which includes a camera for detecting the ear position of the passenger. It is understandable that the camera can detect the ear position of the passenger, and by adjusting whether the ear position of the passenger is at the same height as the speaker 2, the anti-noise signal emitted by the speaker 2 on the pillow body 1 can directly offset the noise received by the passenger's ear, further improving the noise reduction effect of the headrest assembly 100 on the passenger. Optionally, the camera is fixed to the rearview mirror of the vehicle.

[0116] Determining whether the passenger's head is at the same height as the speaker 2 includes: obtaining the position of the speaker 2 in the vehicle, and obtaining the position of the passenger's ear through a camera. It is understandable that to determine whether the passenger's ear is at the same height as the speaker 2 in the vehicle, it is necessary to obtain the position of the speaker 2 in the vehicle and obtain the position of the passenger's ear through a camera.

[0117] It should be noted that the method for obtaining the position of the speaker 2 in the vehicle is not limited here. For example, the position information can be obtained by converting the data collected by the sensor into a unified coordinate system inside the vehicle.

[0118] It is determined whether the ear position of the passenger is at the same height as the position of the speaker 2 in the vehicle. Thus, through this step, the ear position of the passenger is at the same height as the position of the speaker 2 in the vehicle, so that the anti-noise signal emitted by the speaker 2 can be directly transmitted to the passenger's ear, thereby improving the noise reduction effect.

[0119] If the passenger's head is at the same height as the speaker 2, then it is determined that the passenger's head is at the same height as the speaker 2, and the pillow body 1 is determined to match the passenger's head, and the active noise reduction system is turned on so that the anti-noise signal emitted by the speaker 2 on the pillow body 1 directly offsets the noise received by the passenger's ear, thereby improving the noise reduction effect of the headrest assembly 100 on the passenger.

[0120] If not, the passenger's head is not at the same height as the speaker 2, then it is determined that the passenger's head is not at the same height as the speaker 2, and it is determined that the pillow body 1 does not match the passenger's head. Therefore, the position of the pillow body 1 is adjusted in the up and down directions until the passenger's head is at the same height as the speaker 2, and then the active noise reduction system is turned on to ensure that the headrest assembly 100 has a good noise reduction effect for different passengers or the same passenger in different sitting postures.

[0121] In some embodiments of the present invention, Figure 3As shown, the vehicle further includes a driving assembly, and the driving assembly is used to drive the headrest to move in the up-down direction. Adjusting the position of the headrest in the up-down direction includes: controlling the driving assembly to drive the headrest to move in the up-down direction. Thus, when it is necessary to adjust the position of the pillow body 1 in the up-down direction, the driving assembly drives the pillow body 1 to move in the up-down direction to the required position. Specifically, when the passenger's head is not at the same height as the speaker 2, at this time, the driving assembly is required to drive the pillow body 1 to move in the up-down direction until the passenger's head and the speaker 2 are at the same height, thereby ensuring the noise reduction effect of the headrest assembly 100 on the passenger.

[0122] In some embodiments of the present invention, the conditions for determining that there is a passenger on the seat include: satisfying at least one of the following conditions: the pressure sensor detection value of the seat is greater than a preset pressure value, the vehicle's seat belt signal is displayed as being fastened, and the camera of the vehicle's OMS system detects that there is a passenger on the seat. Thus, after determining that there is a passenger on the seat by satisfying at least one of the following conditions: the pressure sensor detection value of the seat is greater than a preset pressure value, the vehicle's seat belt signal is displayed as being fastened, and the camera of the vehicle's OMS system detects that there is a passenger on the seat, the subsequent steps can determine whether the head of the passenger on the seat matches the pillow body 1, thereby reducing misoperation or misjudgment and improving the reliability of the noise reduction method.

[0123] Other components of the vehicle and the seat according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0124] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0125] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A headrest assembly for a seat, characterized in that: include: A pillow body, the pillow body being movably disposed above the backrest of the seat in an up-down direction; A speaker, wherein the speaker is disposed on the pillow body; An error sensor is disposed on the pillow body and is located on the same side as the speaker.

2. The headrest assembly according to claim 1, characterized in that: The speakers are multiple and include a first secondary speaker and a second secondary speaker, the error sensors are multiple and include a first sub-error sensor and a second sub-error sensor, along the left and right directions of the seat, the first secondary speaker and the second secondary speaker are symmetrically arranged on both sides of the pillow body, the first sub-error sensor is located on a side of the first secondary speaker away from the second secondary speaker, and the second sub-error sensor is located on a side of the second secondary speaker away from the first secondary speaker and is symmetrically arranged with the first sub-error sensor.

3. The headrest assembly according to claim 2, characterized in that: Along the left-right direction of the seat, a distance between a center point of the first secondary speaker and a center point of the second secondary speaker is a, wherein 230 mm ≤ a ≤ 250 mm.

4. The headrest assembly according to claim 2, characterized in that: The diameter of the end surface of the sound-emitting end of the first secondary speaker is 63.5mm-114.3mm; And / or, the diameter of the end surface of the sound-emitting end of the second secondary speaker is 63.5 mm-114.3 mm; And / or, the volume of the first secondary speaker is 0.5L-1.5L; And / or, the volume of the second secondary speaker is 0.5L-1.5L.

5. The headrest assembly according to claim 2, characterized in that: The included angle between the extension direction of the first secondary speaker and the extension direction of the second secondary speaker is α, wherein 50°≤α≤70°.

6. The headrest assembly according to claim 5, characterized in that: The pillow body has a first mounting groove and a second mounting groove, the opening of the first mounting groove and the opening of the second mounting groove are open toward the front side of the seat, the first secondary speaker is located in the first mounting groove, and the second secondary speaker is located in the second mounting groove. Along the extension direction of the first secondary speaker, the distance from the end surface of the sound-emitting end of the first secondary speaker to the open mouth of the first installation groove is b, and along the extension direction of the second secondary speaker, the distance from the end surface of the sound-emitting end of the second secondary speaker to the open mouth of the second installation groove is c, wherein b=c and 15mm≤b≤25mm; And / or, along the front-to-back direction of the seat, the distance from one end of the first secondary speaker facing the second secondary speaker to the open opening of the first mounting groove is n, and the distance from one end of the second secondary speaker facing the first secondary speaker to the open opening of the second mounting groove is m, wherein n=m and 25mm≤n≤35mm.

7. The headrest assembly according to claim 2, characterized in that: The first secondary speaker is one or a plurality of speakers arranged along the up-down direction, and the second secondary speaker is one or a plurality of speakers corresponding to the first secondary speaker.

8. The headrest assembly according to claim 2, characterized in that: Along the up-down direction, the distance from the center point of the first sub-error sensor to the nearest center point of the first secondary speaker is d, wherein 60 mm≤d≤80 mm.

9. The headrest assembly according to claim 2, characterized in that: Along the left-right direction of the seat, a distance from a center point of the first sub-error sensor to a center point of the second sub-error sensor is e, wherein 280 mm≤e≤320 mm.

10. The headrest assembly according to claim 2, characterized in that: The first sub-error sensor is one or a plurality of first sub-error sensors arranged along the up-down direction, and the second sub-error sensors are one or a plurality of second sub-error sensors corresponding to the first sub-error sensors.

11. The headrest assembly according to claim 2, characterized in that: Also includes: A photosensitive element is disposed between the first secondary speaker and the second secondary speaker along the left-right direction of the seat, and is located at the same height as the first secondary speaker along the up-down direction.

12. A seat, characterized in that: include: Backrest; According to the headrest assembly according to any one of claims 1 to 11, the pillow body is movably arranged above the backrest along the up-down direction.

13. The seat according to claim 12, characterized in that Also includes: A driving assembly is used to drive the pillow body to move along the up-down direction.

14. The seat according to claim 13, characterized in that The drive assembly comprises: A driving motor, wherein the driving motor is arranged on the backrest; A transmission device, wherein the input end of the transmission device is connected to the output end of the driving motor, and the output end of the transmission device is connected to the pillow body.

15. The seat according to claim 14, characterized in that The transmission device comprises: A gear connected to an output end of the driving motor; A rack guide rail extends along the up-down direction and meshes with the gear, and the rack guide rail is fixedly connected to the pillow body.

16. A vehicle, characterized in that: include: An active noise reduction system, wherein the speaker and the error sensor are connected to the active noise reduction system; A seat according to any one of claims 12 to 15.

17. A method for reducing noise of a vehicle, characterized in that: For the vehicle of claim 16, the noise reduction method comprises: determining that there is a passenger on the seat; Determining whether the pillow body matches the passenger's head; If yes, turning on the active noise reduction system; If not, adjust the position of the pillow body along the up and down direction.

18. The vehicle noise reduction method according to claim 17, characterized in that: The determining whether the pillow body matches the passenger's head includes: determining whether the passenger's head is at the same height as the speaker; If so, the pillow body matches the passenger's head; If not, the pillow body does not match the passenger's head.

19. The vehicle noise reduction method according to claim 18, characterized in that: The pillow body has a photosensitive element located at the same height as the speaker along the up-down direction. The determining whether the passenger's head is at the same height as the speaker comprises: determining whether the photosensitive element detects a light signal; If so, the passenger's head is not at the same height as the speaker; If not, the passenger's head is at the same height as the speaker.

20. The vehicle noise reduction method according to claim 18, characterized in that: The vehicle further includes an OMS system, the OMS system including a camera for detecting the position of the passenger's ear, and the determining whether the passenger's head is at the same height as the speaker includes: Acquire the position of the speaker in the vehicle, and acquire the position of the passenger's ear through the camera; Determining whether the ear of the passenger is at the same height as the speaker in the vehicle; If so, the passenger's head is at the same height as the speaker; If not, the passenger's head is not at the same height as the speaker.

21. The vehicle noise reduction method according to claim 17, characterized in that: The vehicle further includes a driving assembly for driving the headrest to move along the up-down direction, and adjusting the position of the headrest along the up-down direction includes: controlling the driving assembly to drive the headrest to move along the up-down direction.

22. The vehicle noise reduction method according to claim 17, characterized in that: The conditions for determining that there is a passenger on the seat include: satisfying at least one of the following: a pressure sensor detection value of the seat is greater than a preset pressure value, a seat belt signal of the vehicle is displayed as being fastened, and a camera of the OMS system of the vehicle detects that there is a passenger on the seat.

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