Vehicle seat headrest and seat comprising such a headrest
By designing specific structures and speaker installation positions in the vehicle seat headrests, the problem of poor sound quality of speakers in the prior art is solved, and clear conduction of high-frequency sound and improvement of sound quality is achieved.
Patent Information
- Application Number
- CN202290000722.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2021-11-30
- Filing Date
- 2022-11-15
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2032-11-15
AI Technical Summary
The speaker installation position in the headrest of the existing vehicle seats leads to poor sound quality, especially the inability to effectively conduct high-frequency sounds, which may cause sound distortion.
A vehicle seat headrest is designed that includes a central portion and a lateral edge, a speaker is mounted in the lateral edge cavity, the main axis forms a specific angle with respect to the transverse plane to guide sound to the passenger's ears and optimize sound conduction by specific structures and materials such as insulating plastics and foam fillers.
It realizes that while ensuring passengers' field of vision, the sound quality of speakers is improved, ensuring that passengers can clearly hear high-frequency sounds, and reducing the possibility of sound distortion.
Smart Images
Figure CN222769290U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a vehicle seat headrest equipped with a loudspeaker and a seat comprising the headrest. Background Art
[0002] It is known to accommodate loudspeakers in cavities formed in the headrests of vehicles. Usually, the sound quality of the sound produced by the loudspeakers is unsatisfactory. In particular, in order to maintain a large field of view for the seat occupant, in particular towards the rear, the loudspeakers are usually mounted on the front side of the headrest or on the sides of the headrest. In addition, the highest frequencies are not audible to the seat occupant. Sound distortion phenomena may also occur.
[0003] Summary of the utility model
[0004] The present invention aims to remedy these disadvantages.
[0005] Specifically, a first object of the present invention is to propose a headrest that can guarantee an outboard and rearward field of view sufficient to guarantee the safety of the vehicle's passengers and any possible bystanders, while guaranteeing a high acoustic quality of the sound emitted by the speakers.
[0006] A second object of the present invention is to provide a headrest that can guide the sound from the speaker to the cochlear cavity of the seat occupant so that the seat occupant correctly receives and hears the high frequencies. Utility Model Content
[0007] The first subject of the utility model is a vehicle seat headrest, which is intended to be attached to a seat, the seat comprising a seat cushion and a backrest hinged to a seat base, the longitudinal direction being perpendicular to the backrest, the vertical direction being perpendicular to the seat base, and the transverse direction being perpendicular to the longitudinal direction and the vertical direction; the headrest comprises:
[0008] - a central portion comprising a support surface intended to receive the head of a seat occupant;
[0009] - at least a first lateral edge, fixed to the central portion and protruding relative to the supporting surface, said first lateral edge defining an inner cavity;
[0010] - at least one loudspeaker arranged in said inner cavity, said loudspeaker comprising a main axis of sound diffusion and a bowl formed by at least one peripheral wall,
[0011] Characterized in that at least the first lateral edge comprises an end portion located at a distance between 25 mm and 65 mm relative to the supporting surface, the end portion being a portion of the first lateral edge farthest from the supporting surface in the longitudinal direction; the distance is preferably between 45 mm and 60 mm.
[0012] The features disclosed in the following paragraphs may be implemented optionally. The features may be implemented independently of each other or in combination with each other:
[0013] -The central part and the first lateral edge define a space for receiving the passenger's head; the main axis points towards the receiving space, the main axis forms an angle between 20° and 55° with respect to a transverse plane, and preferably forms an angle between 20° and 40° with respect to the transverse plane; the transverse plane contains a lateral direction and a vertical direction.
[0014] - the headrest comprises a second lateral edge fixed to the central part, the second lateral edge comprising an end portion, the end portion being a part of the second lateral edge farthest from the supporting surface in the longitudinal direction; the second lateral edge is arranged so that a gap between 250 mm and 320 mm separates the end portion of the first lateral edge from the end portion of the second lateral edge, the gap preferably being between 260 mm and 280 mm; the gap is measured in the transverse direction.
[0015] The bearing surface has a dimension DI in the transverse direction of between 150 and 180 mm.
[0016] The inner cavity has a volume of precisely between 0.1 and 0.2 liters.
[0017] - a main axis of the loudspeaker is contained in a horizontal plane, and wherein the main axis of the loudspeaker is located at a vertical distance of between 100 mm and 150 mm from an upper edge of said central portion in a vertical direction; the horizontal plane contains a longitudinal direction and a transverse direction.
[0018] - The headrest comprises a shell made of insulating plastic material.
[0019] The headrest includes a padding made of insulating foam.
[0020] - The bowl of the speaker comprises a centre, and wherein the clearance between the centre of the bowl and the ear of a seat occupant when the head of said occupant rests on said support surface is between 50 mm and 100 mm.
[0021] The headrest comprises a sound-permeable mesh fabric arranged at least partially on the first lateral edge and wherein no structural elements outside said fabric are arranged opposite the cone formed by the extension of said at least one peripheral wall of the bowl.
[0022] The utility model also relates to a vehicle seat, comprising: a seat cushion; a backrest hinged to the seat cushion; and a headrest attached to the backrest so as to be movable in a vertical direction; the headrest is shaped according to the above-mentioned features. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] [ Figure 1 ] is a perspective view of a seat according to the present invention;
[0024] [ Figure 2 ] is a top view of a passenger's head and a headrest according to the utility model;
[0025] [ Figure 3 ] is a cross-sectional view along the horizontal plane of the head and the headrest according to the utility model;
[0026] [ Figure 4 ] is a side view of the head and headrest according to the utility model. DETAILED DESCRIPTION
[0027] In this application, the terms "upper", "lower", "front", and "rear" shall refer to Figure 1 Seating positions shown are explained.
[0028] refer to Figure 1 The seat 2 according to the present invention comprises a seat cushion 4, a backrest 6 hinged to the seat, and a headrest 8 mounted on the backrest and movable in a vertical direction relative to the backrest.
[0029] The seat cushion 4 extends substantially in a horizontal plane (X, Y). The backrest 6 extends substantially in a transverse plane (Y, Z). In the present application, the longitudinal direction X is defined as being substantially perpendicular to the backrest 6. This longitudinal direction corresponds to the normal direction of travel of the vehicle when the seat 2 is installed in a vehicle. The vertical direction Z is substantially perpendicular to the seat cushion 4 of the seat. The transverse direction Y corresponds to the transverse direction of the vehicle. The transverse direction Y of the seat is perpendicular to the longitudinal direction X and the vertical direction Z.
[0030] The headrest 8 according to the first subject matter of the present invention includes a housing 10 and two speakers installed in the housing.
[0031] Preferably, the housing 10 is made of plastic material.
[0032] Advantageously, the insulating plastic material may isolate the seat occupant from ambient noise, particularly from rear seats.
[0033] The shell 10 has a central portion 12, which includes a support surface 13 intended to receive the head of a seat occupant, a first lateral edge 14 protruding from one side of the central portion, and a second lateral edge 16 protruding from the opposite side of the central portion. The first lateral edge 14 and the second lateral edge 16 are fastened and fixed relative to the central portion (that is, they are not movable relative to the central portion). The first lateral edge 14, the central portion 12, and the second lateral edge 16 define a space 17 for receiving the head of a seat occupant.
[0034] refer to Figure 2 , the first lateral edge 14 comprises an end portion 18 located at a distance d between 25 mm and 65 mm relative to the support surface 13. This end portion 18 consists of a portion of the first lateral edge which is farthest from the support surface 13 and which is directed towards the front of the vehicle in the longitudinal direction X. The end portion 18 extends in a substantially transverse plane (Y, Z).
[0035] Preferably, the distance D is between 45 mm and 60 mm.
[0036] The second lateral edge 16 also comprises an end portion 20 formed by a portion furthest from the support surface 13 and towards the front of the vehicle in the longitudinal direction X. A gap I between 250 mm and 320 mm separates the end portion 18 from a first lateral edge of the end portion 20 of the second lateral edge. The gap I is measured in the transverse direction Y. The end portion 20 also extends in a substantially transverse plane (Y, Z).
[0037] Preferably, this gap I is between 260 mm and 280 mm.
[0038] Preferably, the bearing surface 13 has a dimension DI in the transverse direction Y of between 150 and 180 millimeters.
[0039] Advantageously, this particular shape and the dimensions associated therewith ensure an outboard and rearward field of view sufficient to ensure the safety of the vehicle occupants and any bystanders, while allowing the installation of a loudspeaker 25 having a main axis of sound diffusion directed towards the space 17 accommodating the occupant's head, and in particular towards the ears of the seat occupant.
[0040] Advantageously, these dimensions take into account the modification of the field of view as a function of the possible angle of rotation of the passenger's head.
[0041] Advantageously, this particular shape and the dimensions associated therewith provide great comfort and good sound reproduction for passengers wearing glasses and passengers with thick hair.
[0042] The second lateral edge 16 is identical to the first lateral edge and will not be described again.
[0043] refer to Figure 3 The headrest 8 further comprises a padding 21 and a mechanism 22 for vertically moving the headrest relative to the backrest mounted in the central part of the housing. The surface of the padding arranged towards the front of the vehicle constitutes a support surface 13 for the head of a passenger sitting on the seat. This support surface is flat or slightly concave.
[0044] Preferably, the filler 21 comprises insulating foam.
[0045] Advantageously, the insulating foam may isolate passengers from certain ambient noises.
[0046] The first lateral edge 14 delimits an inner cavity 24 accommodating a loudspeaker 25 .
[0047] Preferably, the inner cavity 24 is airtight.
[0048] Preferably, the inner cavity has an internal volume of precisely between 0.1 and 0.2 liters.
[0049] Conventionally, the loudspeaker 25 comprises a bowl 26 formed by a peripheral wall 28. The loudspeaker has a main diffusion axis PP centered relative to the peripheral wall. The free end 30 of the bowl can have a circular, square or rectangular shape. When the free end 30 is circular, the main axis PP corresponds to the central axis (or height) of the cone formed by the bowl. When the free end is square or rectangular, the main axis PP of the bowl passes through the intersection of the diagonals of the square or rectangle. In the present patent application, the center C of the bowl 26 is a point located on the main axis PP belonging to the loudspeaker. This point is, for example, located on the external center membrane of the loudspeaker when the loudspeaker includes an external center membrane, or on the loudspeaker core when the loudspeaker core does not include a center membrane.
[0050] As in Figure 3 In the embodiment shown, the main axis PP of the loudspeaker has an angle α between 20° and 55° with respect to the transverse plane (Y, Z). Preferably, the main axis PP of the loudspeaker has an angle α between 20° and 40° with respect to the transverse plane (Y, Z).
[0051] Advantageously, this angle α is between 25° and 35°.
[0052] Most advantageously, the angle α is substantially equal to 30° relative to the transverse plane (Y, Z).
[0053] Advantageously, this angle α can direct the sound from the loudspeaker 25 to the ear canal so that the seat occupant correctly receives and hears the high frequencies. In fact, the high frequencies are mainly directed along the main axis PP. They are distributed over a much lower angular range than other frequencies. Therefore, the loudspeaker arranged in the inner cavity according to the angle α can obtain a much better sound quality, because a set of transmitted frequency ranges reaches the seat occupant's ears.
[0054] Advantageously, when the main axis PP of the loudspeaker has this orientation, the lobes of the ears of the seat occupants do not hinder the transmission of the sound waves.
[0055] Preferably, the inner faces 36 of the first and second lateral edges, that is to say the faces directed towards the receiving space 17, are comprised in Figure 338 is shown in dashed lines in the figure. This fabric 38 is, for example, a 3D synthetic fabric. This fabric has a sound permeability at least equal to 200 l / mm. Advantageously, the loudspeaker is attached in the inner cavity 24 so that no structural element outside the fabric is arranged opposite the cone formed by the extension of the peripheral wall 28 of the bowl.
[0056] Preferably, the space E between the centre C of the bowl and the ear of the seat occupant closest to the loudspeaker, when the occupant's head rests on the support surface 13, is between 50 and 100 millimetres.
[0057] Advantageously, this space E can maintain good acoustic quality of the sound produced by the loudspeaker. This space E can also eliminate the sound distortion inherent in having the ear too close to the loudspeaker.
[0058] To improve the quality of the sound heard by the seat occupant, the principal axis PP of the loudspeaker 25 is preferably contained in the horizontal plane (X, Y) at the height of the occupant's ears, as shown in FIG. Figure 4 . For this purpose, the headrest 8 is mounted to be movable vertically relative to the backrest 6, for example by means of two vertical rods 32 mounted in the mechanism 22. The vertical rods 32 can engage in elastic fastening mechanisms included in the backrest. Moreover, the loudspeaker 25 is preferably positioned at a vertical distance Dv between 100 and 150 mm in the vertical direction Z of the upper edge 34 of said central portion 12 of the headrest.
[0059] Alternatively, a speaker is mounted in the interior cavity of the first lateral edge, but the second lateral edge does not include a speaker.
[0060] The second subject of the utility model is a vehicle seat headrest 8, which is intended to be attached to a seat 2, the seat comprising a seat cushion 4 and a backrest 6 hinged to a seat base, the longitudinal direction X being perpendicular to the backrest, the vertical direction Z being perpendicular to the seat base, and the transverse direction Y being perpendicular to the longitudinal direction and the vertical direction; the headrest 8 comprises:
[0061] - a central portion 12 comprising a support surface 13 intended to receive the head of a seat occupant;
[0062] at least one first lateral edge 14 , fixed to the central portion and projecting relative to the support surface 13 , the first lateral edge 14 and the central portion 12 delimiting a space 17 for receiving the head of a passenger, the first lateral edge delimiting an inner cavity 24 ;
[0063] at least one loudspeaker 25 arranged in said inner cavity, said loudspeaker comprising a main axis PP of sound diffusion and a bowl 26 formed by at least one peripheral wall 28,
[0064] Characteristically, said main axis PP points towards said receiving space, said main axis PP forming an angle α between 25° and 55° with a transverse plane (YZ), and preferably forming an angle of 40° with said transverse plane.
[0065] The object of this second subject matter of the invention is to propose a headrest that can direct the sound from the loudspeaker to the cochlear cavity of the seat occupant so that the seat occupant correctly receives and hears the high frequencies.
[0066] This second subject matter of the present invention is not dependent on the first subject matter of the present invention.
[0067] The features disclosed in the following paragraphs can be optionally implemented with the second subject of the present invention. The features can be implemented independently of each other or in combination with each other:
[0068] - At least the first lateral edge comprises an end portion located at a distance between 25 and 65 mm relative to the support surface, said end portion being the part of the first lateral edge farthest from the support surface in the longitudinal direction; said distance is preferably between 45 and 60 mm.
[0069] - the headrest comprises a second lateral edge fixed to the central part, the second lateral edge comprising an end portion, the end portion being a part of the second lateral edge farthest from the supporting surface in the longitudinal direction; the second lateral edge is arranged so that a gap between 250 mm and 320 mm separates the end portion of the first lateral edge from the end portion of the second lateral edge, the gap preferably being between 260 mm and 280 mm; the gap is measured in the transverse direction.
[0070] The bearing surface has a dimension DI in the transverse direction of between 150 and 180 mm.
[0071] The inner cavity has a volume of precisely between 0.1 and 0.2 liters.
[0072] - a main axis of the loudspeaker is contained in a horizontal plane, and wherein the main axis of the loudspeaker is located at a vertical distance of between 100 mm and 150 mm from an upper edge of said central portion in a vertical direction; the horizontal plane contains a longitudinal direction and a transverse direction.
[0073] - The headrest comprises a shell made of insulating plastic material.
[0074] The headrest includes a padding made of insulating foam.
[0075] - The bowl of the speaker comprises a centre, and wherein the clearance between the centre of the bowl and the ear of a seat occupant when the head of said occupant rests on said support surface is between 50 mm and 100 mm.
[0076] The headrest comprises a sound-permeable mesh fabric arranged at least partially on the first lateral edge and wherein no structural elements outside said fabric are arranged opposite the cone formed by the extension of said at least one peripheral wall of the bowl.
[0077] The utility model also relates to a vehicle seat, comprising: a seat cushion; a backrest hinged to the seat cushion; and a headrest attached to the backrest so as to be movable in a vertical direction; the headrest is shaped according to the above-mentioned features.
Claims
1. A vehicle seat headrest (8), the headrest being used to be attached to a seat (2), the seat comprising a seat cushion (4) and a backrest (6) hinged to a seat base, the longitudinal direction (X) being perpendicular to the backrest, the vertical direction (Z) being perpendicular to the seat base, and the transverse direction (Y) being perpendicular to the longitudinal direction and the vertical direction; the headrest (8) comprising: - a central part (12) comprising a support surface (13) for receiving the head of a seat occupant; - at least one first lateral edge (14) fixed to said central portion and projecting relative to said support surface (13), said first lateral edge defining an inner cavity (24); - at least one loudspeaker (25) arranged in the inner cavity, the loudspeaker comprising a main axis (PP) of sound diffusion and a bowl (26) formed by at least one peripheral wall (28), Characterized in that at least the first lateral edge (14) comprises an end portion (18) located at a distance (D) between 25 mm and 65 mm relative to the supporting surface (13), the end portion (18) being the portion of the first lateral edge farthest from the supporting surface (13) in the longitudinal direction (X).
2. The headrest (8) according to claim 1, characterized in that: The central portion (12) and the first lateral edge (14) define a space (17) for receiving the head of a passenger; the main axis (PP) points towards the receiving space, the main axis (PP) forms an angle (α) between 20° and 55° with respect to a transverse plane (YZ), the transverse plane containing the lateral direction (Y) and the vertical direction (Z).
3. The headrest (8) according to claim 1, characterized in that: The headrest comprises a second lateral edge (16) fixed to the central portion (12), the second lateral edge comprising an end portion (20), the end portion being a portion of the second lateral edge farthest from the support surface (13) in the longitudinal direction (X); the second lateral edge (16) being arranged so that a gap (I) between 250 mm and 320 mm separates the end portion (18) of the first lateral edge from the end portion (20) of the second lateral edge, the gap (I) being measured in the transverse direction (Y).
4. The headrest (8) according to claim 1, characterized in that The bearing surface (13) has a dimension in the transverse direction (Y) between 150 and 180 millimeters.
5. The headrest (8) according to claim 1, characterized in that: The inner cavity (24) has a volume of precisely between 0.1 and 0.2 liters.
6. The headrest (8) according to claim 1, characterized in that The main axis (PP) of the loudspeaker (25) is contained in a horizontal plane (X, Y), and wherein the main axis (PP) of the loudspeaker is located at a vertical distance (Dv) between 100 mm and 150 mm in the vertical direction (Z) of the upper edge (34) of the central part; the horizontal plane (X, Y) includes the longitudinal direction (X) and the transverse direction (Y).
7. The headrest (8) according to claim 1, characterized in that The headrest comprises a shell (10) made of insulating plastic material.
8. The headrest (8) according to claim 1, characterized in that The headrest comprises a padding (21) made of insulating foam.
9. The headrest (8) according to claim 1, characterized in that The bowl (26) of the speaker includes a center (C), and wherein when a seat occupant's head rests on the support surface (13), the space (E) between the center of the bowl and the occupant's ear is between 50 mm and 100 mm.
10. The headrest (8) according to claim 1, characterized in that The headrest comprises a sound-permeable mesh fabric (38) at least partially arranged on the first lateral edge (14), and wherein no structural elements are arranged outside the fabric opposite to the cone formed by the extension of the at least one peripheral wall (28) of the bowl.
11. The headrest (8) according to claim 1, characterized in that The distance (D) between the end portion and the support surface is between 45 mm and 60 mm.
12. The headrest (8) according to claim 2, characterized in that The angle (α) between the main axis (PP) and the transverse plane (YZ) is between 20° and 40°.
13. The headrest (8) according to claim 3, characterized in that The gap (I) is between 260 mm and 280 mm.
14. A vehicle seat (2), comprising: A seat cushion (4); a backrest (6) hinged to the seat cushion; and a headrest (8) which is attached to the backrest in a manner movable in a vertical direction (V); characterised in that the headrest of the vehicle seat is shaped according to any one of claims 1 to 13.