Headrest, and chair, vehicle seat and vehicle comprising same

Abstract

A headrest includes a headrest frame, a support bar portion connected to a lower surface of the headrest frame, a buffer member on a front surface of the headrest frame, a sound generating device disposed between the headrest frame and the buffer member and outputting sound, and a sheath member on a rear surface and side surfaces of the headrest frame and the front surface and side surfaces of the buffer member.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of and priority to Korean Patent Application No. 10-2024-0021890, filed on February 15, 2024, which is hereby incorporated by reference in its entirety for all purposes as if fully set forth herein. Technical Field

[0003] The present disclosure relates to a headrest, and a chair, a vehicle seat, and a vehicle including the headrest. Background Art

[0004] A vehicle may include a sound generating device that outputs sound based on an audio signal output from a multimedia device such as a car audio system. For example, a sound generating device applied to a vehicle may include a front speaker and a rear speaker configured as a coil type. Summary of the Invention

[0005] Vehicle sound systems may have limitations in outputting multi-channel, true sound or stereo sound through front and rear speakers. While increasing the number of speakers allows for stereo sound, there may be limitations on increasing the number of speakers due to vehicle space limitations and the size of coil-based speakers.

[0006] The present inventors have recognized the problems described above and have conducted various studies and experiments for outputting sound through a headrest. Based on the various studies and experiments, the present inventors provide a headrest that outputs sound, and a chair and a vehicle including the headrest.

[0007] One aspect of the present disclosure is directed to providing a headrest that outputs sound, and a chair, a vehicle seat, and a vehicle including the headrest.

[0008] One aspect of the present disclosure is to provide a headrest that outputs clear sounds in a mid- to high-frequency range, and a chair, a vehicle seat, and a vehicle including the headrest.

[0009] Another aspect of the present disclosure is directed to providing a headrest that outputs stereo sound, and a chair, a vehicle seat, and a vehicle including the headrest.

[0010] Additional features, advantages, and aspects will be set forth in the following description, and in part will be apparent from the description, or may be learned by practicing the inventive concepts provided herein. Other features, advantages, and aspects of the present disclosure may be realized and obtained by the structures particularly pointed out in the written description or its derivatives, its claims, and the accompanying drawings.

[0011] To achieve these and other advantages and aspects of the present disclosure, as embodied and broadly described herein, in one or more aspects, a headrest is provided, comprising: a headrest frame; a support rod portion connected to a lower surface of the headrest frame; a cushioning member on a front surface of the headrest frame; a sound-generating device that is disposed between the headrest frame and the cushioning member and outputs sound; and a cover member on a rear surface and side surfaces of the headrest frame and a front surface and side surfaces of the cushioning member.

[0012] In one or more aspects, a headrest is provided, comprising: a headrest portion; a first sound-emitting device connected to a first side surface of the headrest portion; a second sound-emitting device connected to a second side surface of the headrest portion, opposite the first side surface; and a cover member over the headrest portion, the first sound-emitting device, and the second sound-emitting device. Each of the first sound-emitting device and the second sound-emitting device includes: an enclosure connected to the headrest portion; a cushioning member on a front surface of the enclosure; and a vibration device disposed between the enclosure and the cushioning member and configured to output sound.

[0013] In one or more aspects, a chair is provided, comprising: a seat portion; a backrest portion connected to the seat portion; and a headrest portion connected to an upper portion of the backrest portion. The headrest portion includes: a headrest frame; a support rod portion connected to a lower surface of the headrest frame; a cushioning member on a front surface of the headrest frame; a sound-generating device disposed between the headrest frame and the cushioning member and configured to output sound; and a cover member on a rear surface and side surfaces of the headrest frame and on a front surface and side surfaces of the cushioning member.

[0014] In one or more aspects, a chair is provided, comprising: a seat portion; a backrest connected to the seat portion; and a headrest connected to an upper portion of the backrest. The headrest comprises: a headrest portion; a first sound-emitting device connected to a first side surface of the headrest portion; a second sound-emitting device connected to a second side surface of the headrest portion, opposite the first side surface; and a cover member over the headrest portion, the first sound-emitting device, and the second sound-emitting device. Each of the first sound-emitting device and the second sound-emitting device comprises: a housing connected to the headrest portion; a cushioning member on a front surface of the housing; and a vibration device disposed between the housing and the cushioning member and configured to output sound.

[0015] In one or more aspects, a vehicle seat is provided, comprising: a seat cushion; a seat back connected to the seat cushion; and a headrest connected to an upper portion of the seat back. The headrest includes: a headrest frame; a support rod connected to a lower surface of the headrest frame; a cushioning member on a front surface of the headrest frame; a sound-generating device disposed between the headrest frame and the cushioning member and configured to output sound; and a cover member on a rear surface and side surfaces of the headrest frame and on a front surface and side surfaces of the cushioning member.

[0016] In one or more aspects, a vehicle seat is provided, comprising: a seat cushion; a seat back connected to the seat cushion; and a headrest connected to an upper portion of the seat back. The headrest comprises: a headrest portion; a first sound-emitting device connected to a first side surface of the headrest portion; a second sound-emitting device connected to a second side surface of the headrest portion, opposite the first side surface; and a cover member over the headrest portion, the first sound-emitting device, and the second sound-emitting device. Each of the first and second sound-emitting devices comprises: a housing connected to the headrest portion; a cushioning member on a front surface of the housing; and a vibration device disposed between the housing and the cushioning member and configured to output sound.

[0017] In one or more aspects, a vehicle is provided, including a vehicle seat. The vehicle seat includes a seat cushion, a seat back connected to the seat cushion, and a headrest connected to the upper portion of the seat back. The headrest includes a headrest frame, a support rod connected to the lower surface of the headrest frame, a cushioning member on the front surface of the headrest frame, a sound-generating device disposed between the headrest frame and the cushioning member and configured to output sound, and a cover member on the rear and side surfaces of the headrest frame and the front and side surfaces of the cushioning member.

[0018] In one or more aspects, a vehicle is provided, comprising a vehicle seat. The vehicle seat comprises: a seat cushion; a seat back connected to the seat cushion; and a headrest connected to an upper portion of the seat back. The headrest comprises: a headrest portion; a first sound-emitting device connected to a first side surface of the headrest portion; a second sound-emitting device connected to a second side surface of the headrest portion opposite to the first side surface; and a cover member over the headrest portion, the first sound-emitting device, and the second sound-emitting device. Each of the first sound-emitting device and the second sound-emitting device comprises a shell connected to the headrest portion; a cushioning member on a front surface of the shell; and a vibration device disposed between the shell and the cushioning member and outputting sound.

[0019] Details of other exemplary embodiments are included in the detailed description and accompanying drawings of the present disclosure.

[0020] According to one or more embodiments of the present disclosure, a headrest that outputs sound, and a chair, a vehicle seat, and a vehicle including the headrest may be provided.

[0021] According to one or more embodiments of the present disclosure, a headrest that outputs clear sounds in the middle and high frequency bands, and a chair, a vehicle seat, and a vehicle including the headrest may be provided.

[0022] According to one or more embodiments of the present disclosure, a headrest that outputs stereo sound and / or surround sound, and a chair, a vehicle seat, and a vehicle including the headrest may be provided.

[0023] According to one or more embodiments of the present disclosure, in the sound emitting device, the vibration element and the signal supply member can be configured as one component (or one part or one element), and thus, a single material effect can be obtained.

[0024] Other systems, methods, features, and advantages will be, or will become, apparent to those skilled in the art. It is intended that all such additional systems, methods, features, and advantages be included within this description, be within the scope of the present disclosure, and be protected by the accompanying claims. Nothing in this section should be construed as limiting those claims. Further aspects and advantages are discussed below in conjunction with aspects of the present disclosure.

[0025] It is to be understood that both the foregoing description and the following description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the disclosure as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate aspects and embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

[0027] Figure 1 is a perspective view illustrating a headrest according to an embodiment of the present disclosure.

[0028] Figure 2 It shows that it has been removed Figure 1 A perspective view of an embodiment of a cover member on a headrest is shown.

[0029] Figure 3 is an exploded perspective view illustrating a headrest according to an embodiment of the present disclosure.

[0030] Figure 4 It is along Figure 2 A cross-sectional view taken along line II' is shown.

[0031] Figure 5 It is along Figure 2 A cross-sectional view taken along line II-II' is shown.

[0032] Figure 6 is a perspective view illustrating a headrest according to another embodiment of the present disclosure.

[0033] Figure 7 It shows that it has been removed Figure 6 A perspective view of an embodiment of a cover member on a headrest is shown.

[0034] Figure 8 is a plan view illustrating a headrest according to another embodiment of the present disclosure.

[0035] Figure 9 The present invention is shown in FIG. Figures 6 to 8 An exploded perspective view of the headrest portion is shown.

[0036] Figure 10 The present invention is shown in FIG. Figures 6 to 8 An exploded perspective view of the first sound emitting device is shown.

[0037] Figure 11 It is along Figure 10 A cross-sectional view taken along line III-III' is shown.

[0038] Figure 12 The present invention is shown in FIG. Figures 6 to 8 An exploded perspective view of the second sound emitting device is shown.

[0039] Figure 13 It is along Figure 12 A cross-sectional view taken along line IV-IV' is shown.

[0040] Figure 14 is a rear view illustrating a headrest according to another embodiment of the present disclosure.

[0041] Figure 15 is a perspective view illustrating a headrest according to another embodiment of the present disclosure.

[0042] Figure 16 It is along Figure 14 A cross-sectional view taken along line V-V' is shown.

[0043] Figure 17 is a perspective view illustrating a vibration element according to an embodiment of the present disclosure.

[0044] Figure 18 It is along Figure 17 A cross-sectional view taken along line VI-VI' is shown.

[0045] Figure 19 It is along Figure 17 A cross-sectional view taken along line VII-VII' is shown.

[0046] Figure 20 is a perspective view illustrating a vibration layer according to another embodiment of the present disclosure.

[0047] Figure 21 is a perspective view illustrating a vibration layer according to another embodiment of the present disclosure.

[0048] Figure 22 is a perspective view illustrating a vibration element according to another embodiment of the present disclosure.

[0049] Figure 23is a perspective view illustrating a chair according to an embodiment of the present disclosure.

[0050] Figure 24 is a perspective view showing a vehicle seat according to an embodiment of the present disclosure.

[0051] Figure 25 is a plan view showing a vehicle according to an embodiment of the present disclosure.

[0052] Throughout the drawings and detailed description, unless otherwise specified, the same reference numerals should be understood to refer to the same elements, features, and structures. For clarity, illustration, and convenience, the sizes, lengths, and thicknesses of layers, regions, and elements, as well as their descriptions, may be exaggerated. DETAILED DESCRIPTION

[0053] The advantages and features of the present disclosure and their implementation methods are illustrated by various aspects described with reference to the accompanying drawings. However, the present disclosure can be implemented in different forms and should not be construed as limited to the exemplary aspects set forth herein. Rather, these exemplary aspects are examples and are provided to make the present disclosure thorough and complete, to assist those skilled in the art in understanding the inventive concept, and not to limit the scope of protection of the present disclosure.

[0054] The shapes, sizes, proportions, angles, and quantities disclosed in the drawings used to describe the embodiments of the present disclosure are merely examples, and therefore, the present disclosure is not limited to the details shown. The same reference numerals refer to the same elements throughout. In the following description, when a detailed description of a related known function or configuration is determined to be unnecessary to obscure the main points of the present disclosure, the detailed description will be omitted.

[0055] In the case where “including,” “having,” and “comprising” are used in this specification, another part may be added unless “only” is used. Terms in the singular form may include plural forms unless otherwise noted.

[0056] When interpreting an element, although there is no explicit description, the element is interpreted as including a range of error.

[0057] When describing a positional relationship, for example, when the positional relationship between two parts is described as "on", "above", "below", or "adjacent", unless "just" or "directly" is used, one or more other parts may be arranged between the two parts.

[0058] When describing a temporal relationship, for example, when a temporal order is described as "after," "subsequently," "next," or "before," discontinuous cases may be included unless "just" or "directly" is used.

[0059] It will be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0060] When describing elements of the present disclosure, terms such as "first," "second," "A," "B," "(a)," "(b)," etc. may be used. These terms are intended to identify corresponding elements from other elements, and are not used to define the nature, basis, order, or quantity of the elements.

[0061] When an element is “connected,” “coupled,” or “contacted” to another element, the element may not only be directly connected, coupled, or contacted to the other element but also be indirectly connected, coupled, or contacted to the other element with one or more intermediate elements interposed therebetween, unless otherwise specified.

[0062] When an element is stated to be “in contact with” or “overlapping” another element, the element may not only be directly in contact with, overlapping with, etc. the other element, but may also be indirectly in contact with or overlapping the other element with one or more intermediate elements disposed or interposed therebetween, unless otherwise specified.

[0063] The term "at least one" should be understood to include any and all combinations of one or more of the associated listed items. For example, the meaning of "at least one of the first, second, and third items" refers to the combination of all items listed from two or more of the first, second, and third items, as well as the first, second, or third item.

[0064] The features of the various embodiments of the present disclosure may be combined or combined with each other in part or in whole, and may be mutually operated and driven in different ways as can be fully understood by those skilled in the art. The embodiments of the present disclosure may be performed independently of each other or may be performed together in a mutually dependent relationship.

[0065] Hereinafter, an exemplary embodiment of a light emitting display device according to the present disclosure will be described in detail with reference to the accompanying drawings. For ease of description, the scales of various elements illustrated in the drawings are different from the actual scales, and therefore are not limited to the scales illustrated in the drawings.

[0066] Figure 1 is a perspective view illustrating a headrest according to an embodiment of the present disclosure. Figure 2 It shows that it has been removed Figure 1 A perspective view of an embodiment of a cover member on a headrest is shown. Figure 3 is an exploded perspective view illustrating a headrest according to an embodiment of the present disclosure. Figure 4 It is along Figure 2 A cross-sectional view taken along line II' is shown. Figure 5 It is along Figure 2 A cross-sectional view taken along line II-II' is shown.

[0067] Reference Figures 1 to 5 The headrest 10 according to an embodiment of the present disclosure can be configured to output sound. For example, the headrest 10 can be configured to output left-channel sound and right-channel sound. For example, the headrest 10 can be configured to output two-channel stereo sound including left-channel sound and right-channel sound. For example, the headrest 10 can be a headrest device, a headrest speaker, a headrest speaker device, a headrest for a chair, a headrest speaker for a chair, a headrest speaker device for a chair, a headrest for a vehicle, a headrest speaker for a vehicle, or a headrest speaker device for a vehicle, but the embodiments of the present disclosure are not limited thereto.

[0068] The headrest 10 may include a headrest portion 100 , a support rod portion 120 , a cushioning member 130 , a sound generating device, and a cover member (or outer member or skin member) 190 .

[0069] The headrest portion 100 may include a headrest frame 110. For example, the headrest portion 100 or the headrest frame 110 may be the main body, main structure, shell, or housing of the headrest 10, but the embodiments of the present disclosure are not limited thereto. For example, the headrest portion 100 or the headrest frame 110 may include a quadrilateral shape or a quadrilateral shape with a curved portion, but the embodiments of the present disclosure are not limited thereto.

[0070] The headrest portion 100 or the headrest frame 110 according to an embodiment of the present disclosure may be made of a plastic material, such as plastic or styrene material, but the embodiment of the present disclosure is not limited thereto.

[0071] The plastic material of the headrest portion 100 or the headrest frame 110 may be made of polyethylene terephthalate, polycarbonate, polyimide, polypropylene, polyarylate, polyethersulfone, polyethylene naphthalate, polysulfone, cycloolefin copolymer, or carbon fiber reinforced plastic (CFRP), but the embodiments of the present disclosure are not limited thereto.

[0072] The material of the headrest portion 100 or the headrest frame 110 may be ABS material. ABS material may be acrylonitrile, butadiene, and styrene.

[0073] The headrest portion 100 or the headrest frame 110 according to an embodiment of the present disclosure may be configured to accommodate the sound generating device 150. For example, the headrest portion 100 or the headrest frame 110 may be configured to accommodate a driving circuit portion for driving the sound generating device 150, but the embodiments of the present disclosure are not limited thereto.

[0074] The headrest portion 100 or the headrest frame 110 according to an embodiment of the present disclosure may include a base frame 111 and a receiving portion 113 .

[0075] The base frame 111 may include a quadrangular shape or a quadrangular shape with a curved portion, but the embodiments of the present disclosure are not limited thereto. The base frame 111 may include a first surface (or front surface) and a second surface (or rear surface) 111r.

[0076] The receiving portion 113 may be formed or configured in the base frame 111. For example, the receiving portion 113 may be formed or configured in the base frame 111 and receive or support the sound generating device 150. For example, the receiving portion 113 may be formed or configured in the base frame 111 by a protrusion 112 protruding from the first surface of the base frame 111. For example, the receiving portion 113 may be a receiving space, a groove, a receiving slot, or a supporting slot, but embodiments of the present disclosure are not limited thereto.

[0077] The base frame 111 according to an embodiment of the present disclosure may include a first area A1 , a second area A2 , and a third area A3 .

[0078] The first area A1 may be one area or a left area of the base frame 111. The second area A2 may be another area or a right area of the base frame 111. The first area A1 and the second area A2 may be disposed or arranged in parallel.

[0079] The third area A3 may surround the first area A1 and the second area A2. For example, the third area A3 may be provided to surround each of the first area A1 and the second area A2. For example, the third area A3 may include a protrusion 112 that surrounds each of the first area A1 and the second area A2. For example, the protrusion 112 may protrude from the third area A3 of the base frame 111 and thereby provide a receiving portion 113 for the base frame 111.

[0080] The receiving portion 113 of the base frame 111 may include a first receiving portion 113 a and a second receiving portion 113 b .

[0081] The first receiving portion 113a may be located in the first area A1 of the base frame 111. For example, the first receiving portion 113a may be provided by the protrusion 112 surrounding the first area A1 of the first, second, and second areas A2 and A3 of the base frame 111.

[0082] The second receiving portion 113b may be located in the second area A2 of the base frame 111. For example, the second receiving portion 113b may be provided by the protrusion 112 surrounding the second area A2 of the first, second, and second areas A1, A2, and A3 of the base frame 111.

[0083] Each of the first and second accommodation portions 113 a and 113 b may be provided in the base frame 111 by the protrusion 112 and may have a height corresponding to that of the protrusion 112 .

[0084] The support rod portion 120 may be configured to be connected (or coupled) to or support the headrest portion 100 or the headrest frame 110 .

[0085] The support rod portion 120 according to an embodiment of the present disclosure may include one or more support rods 122 .

[0086] One or more support rods 122 can be configured to be connected to the lower surface of the headrest portion 100 or the headrest frame 110. For example, one or more support rods 122 can be configured to be connected to the base frame 111. For example, one or more support rods 122 can be configured to be connected to the lower surface of the base frame 111. For example, the support rod portion 120 can include a pair of support rods 122. For example, one or more (or a pair of) support rods 122 can be connected to the upper portion of the seatback of a vehicle seat or the backrest frame of a chair.

[0087] The cushioning member 130 may be disposed on the front surface of the headrest frame 110. For example, the cushioning member 130 may be configured to cover the front surface of the headrest frame 110. The cushioning member 130 may be configured to have the same size and shape as the headrest frame 110, but embodiments of the present disclosure are not limited thereto. For example, the cushioning member 130 may include a material that absorbs shock. For example, the cushioning member 130 may include a foam material or a sponge material, but embodiments of the present disclosure are not limited thereto.

[0088] The buffer member 130 according to an embodiment of the present disclosure may include a hollow portion 131 overlapping (or corresponding to) the receiving portion 113 of the headrest frame 110 .

[0089] The hollow portion 131 may be a path through which the sound generated (or output) by the sound generating device 150 is output to the outside. For example, the hollow portion 131 may be configured to pass through the buffer member 130 in the thickness direction Z of the buffer member 130 .

[0090] The hollowness 131 according to an embodiment of the present disclosure may include a first hollowness 131 a and a second hollowness 131 b .

[0091] The first hollow portion 131 a may overlap with (or correspond to) the first receiving portion 113 a of the headrest frame 110 . The second hollow portion 131 b may overlap with (or correspond to) the second receiving portion 113 b of the headrest frame 110 .

[0092] The sound-generating device 150 may be positioned between the headrest frame 110 and the cushioning member 130 and may be configured to output sound. The sound-generating device 150 may be accommodated in or supported by the accommodation portion 113 of the headrest frame 110 and output sound. For example, the headrest frame 110 may include a support portion 114. For example, the headrest frame 110 may include a support portion 114 that supports the sound-generating device 150. For example, the support portion 114 may be configured to support the periphery of the sound-generating device 150. For example, the support portion 114 may be positioned along the edge of the accommodation portion 113 and support the edge of the sound-generating device 150.

[0093] The sound generating device 150 may be configured to include a piezoelectric material and may vibrate (or displace) according to a piezoelectric effect based on a driving signal and output (or generate) sound (or sound waves).

[0094] The sound generating device 150 according to an embodiment of the present disclosure may include a vibration device 151 .

[0095] The vibration device 151 may be positioned between the receiving portion 113 of the headrest frame 110 and the cushioning member 130 and may be configured to output sound. The vibration device 151 may be received in or supported by the receiving portion 113 of the headrest frame 110 and output sound. For example, the vibration device 151 may be configured to be supported by the support portion 114 of the headrest frame 110. For example, the edge portion of the vibration device 151 may be configured to be supported by the support portion 114.

[0096] The vibration device 151 according to an embodiment of the present disclosure can be configured to include a piezoelectric material. The vibration device 151 can vibrate (or shift) and output (or generate) sound (or sound waves) according to the piezoelectric effect based on the drive signal (or vibration drive signal or voice signal). For example, the vibration device 151 can be a piezoelectric vibration device including a piezoelectric material. For example, the vibration device 151 can include a piezoelectric material, and therefore, a clear sound in the mid- and high-frequency bands can be output. For example, the vibration device 151 can be configured to output a sound of about 200 Hz to about 20 kHz.

[0097] The vibration device 151 according to an embodiment of the present disclosure may include a first vibration device 151 - 1 and a second vibration device 151 - 2 .

[0098] The first vibration device 151-1 can be accommodated in or supported by the first accommodation portion 113a of the headrest frame 110 and output sound. The second vibration device 151-2 can be accommodated in or supported by the second accommodation portion 113b of the headrest frame 110 and output sound. For example, the support portion 114 of the headrest frame 110 may include a first support portion 114a that supports the first vibration device 151-1 and a second support portion 114b that supports the second vibration device 151-2. For example, the first support portion 114a may be arranged along an edge of the first accommodation portion 113a and may be configured to support the edge of the first vibration device 151-1. For example, the second support portion 114b may be arranged along an edge of the second accommodation portion 113b and may be configured to support the edge of the second vibration device 151-2.

[0099] According to an embodiment of the present disclosure, the first vibration device 151-1 and the second vibration device 151-2 can be configured to output different sounds. For example, the first vibration device 151-1 can be configured to output a first sound (or right channel sound). The second vibration device 151-2 can be configured to output a second sound (or left channel sound). Therefore, the sound-emitting device 150 or the vibration device 151 can generate (or output) a two-channel stereo sound including a first sound based on the first vibration device 151-1 and a second sound based on the second vibration device 151-2.

[0100] Reference Figures 3 to 5 , each of the first vibration device 151 - 1 and the second vibration device 151 - 2 according to an embodiment of the present disclosure may include a vibration member 151 a and a vibration element 151 b .

[0101] The vibration member 151a can output sound (or sound waves) based on the vibration (or displacement) of the vibration element 151b. For example, the vibration member 151a can be a diaphragm, a vibration plate, a vibration substrate, a vibration panel, a sound-generating plate, a passive vibration plate, a passive vibration member, a passive vibration panel, a sound output plate, or a sound-generating vibration plate, but the embodiments of the present disclosure are not limited thereto.

[0102] The vibration member 151a may include a single non-metallic material or a composite non-metallic material, but the embodiments of the present disclosure are not limited thereto. For example, the single non-metallic material or the composite non-metallic material of the vibration member 151a may include one or more of wood, rubber, plastic, carbon, glass, fiber, cloth, paper, mirror, and leather, but the embodiments of the present disclosure are not limited thereto. For example, the paper may be cone paper used for speakers. For example, the cone paper may be pulp or foamed plastic, etc., but the embodiments of the present disclosure are not limited thereto.

[0103] The vibration member 151 a according to an embodiment of the present disclosure may be made of a plastic material, such as plastic or styrene material, but the embodiment of the present disclosure is not limited thereto.

[0104] The plastic material of the vibration member 151a may be made of polyethylene terephthalate, polycarbonate, polyimide, polypropylene, polyarylate, polyethersulfone, polyethylene naphthalate, polysulfone, cycloolefin copolymer, or carbon fiber reinforced plastic (CFRP), but the embodiments of the present disclosure are not limited thereto.

[0105] The material of the vibration member 151a may be ABS material, which may be acrylonitrile, butadiene, and styrene.

[0106] The vibration member 151a according to another embodiment of the present disclosure may be made of a porous material. For example, the vibration member 151a may include a microcellular plastic material. For example, the vibration member 151a may be made of a polyethylene terephthalate material or a polycarbonate material, but the embodiments of the present disclosure are not limited thereto. For example, the vibration member 151a may be made of a microcellular polyethylene terephthalate (MCPET) material. The vibration member 151a made of MCPET may have a high plateau sound reproduction capability because of its low density and excellent elastic force, thereby enhancing the quality of the sound.

[0107] The coupling member 153 may be disposed (or inserted) between the headrest frame 110 and the vibration member 151a. For example, the coupling member 153 may be disposed (or inserted) between the support portion 114 of the headrest frame 110 and the vibration member 151a. For example, the coupling member 153 may be disposed (or inserted) between the support portion 114 of the headrest frame 110 and the rear edge of the vibration member 151a.

[0108] The vibration member 151a can be accommodated in the accommodation portion 113 of the headrest frame 110 and can be connected or coupled to the support portion 114 of the headrest frame 110 by using the coupling member 153. For example, the edge portion of the vibration member 151a can be connected or coupled to the support portion 114 of the headrest frame 110 by using the coupling member 153. The vibration member 151a can be spaced apart from the bottom surface of the accommodation portion 113. For example, the center portion of the vibration member 151a other than the edge portion can be spaced apart from the bottom surface of the accommodation portion 113. The vibration member 151a can be configured in the accommodation portion 113. For example, the vibration member 151a can be configured to cover the accommodation portion 113. For example, the vibration member 151a can have the same shape as the accommodation portion 113 and can have a size larger than the accommodation portion 113 and cover the accommodation portion 113, but embodiments of the present disclosure are not limited thereto.

[0109] In the first vibration device 151-1, the vibration member 151a can be accommodated in the first receiving portion 113a and can be connected or coupled to the first support portion 114a of the support portion 114 using the first coupling member 153a of the coupling member 153. For example, the edge portion of the vibration member 151a can be connected or coupled to the first support portion 114a using the first coupling member 153a. For example, the center portion of the vibration member 151a, excluding the edge portion, can be spaced apart from the bottom surface of the first receiving portion 113a. The vibration member 151a can be arranged on the first receiving portion 113a. For example, the vibration member 151a can be arranged to cover the first receiving portion 113a. For example, the vibration member 151a can have the same shape as the first receiving portion 113a and can have a larger size than the first receiving portion 113a and cover the first receiving portion 113a, but embodiments of the present disclosure are not limited to this.

[0110] In the second vibration device 151-2, the vibration member 151a can be accommodated in the second accommodating portion 113b and can be connected or coupled to the second support portion 114b of the support portion 114 using the second coupling member 153b of the coupling member 153. For example, the edge portion of the vibration member 151a can be connected or coupled to the second support portion 114b using the second coupling member 153b. For example, the center portion of the vibration member 151a, excluding the edge portion, can be spaced apart from the bottom surface of the second accommodating portion 113b. The vibration member 151a can be arranged on the second accommodating portion 113b. For example, the vibration member 151a can be arranged to cover the second accommodating portion 113b. For example, the vibration member 151a can have the same shape as the second accommodating portion 113b and can be larger than the second accommodating portion 113b and cover the second accommodating portion 113b, but embodiments of the present disclosure are not limited to this.

[0111] The vibration element 151b can be configured to vibrate (or displace) the vibration member 151a. For example, the vibration element 151b can be configured to vibrate (or displace or drive) the vibration member 151a by vibration (or displacement or drive) based on a drive signal (or vibration drive signal or voice signal). For example, the vibration element 151b can output (or generate) sound by using the vibration member 151a as a vibration plate. For example, the vibration element 151b may include a piezoelectric vibration element with a piezoelectric effect. For example, the vibration element 151b can be a vibration generating device, a vibration membrane, a vibration generating membrane, a vibrator, an active vibrator, an active vibration generator, an actuator, an exciter, a membrane actuator, a membrane exciter, an ultrasonic actuator or an active vibration member, etc., but the embodiments of the present disclosure are not limited thereto.

[0112] The vibration element 151b can be set (or connected to) or configured on the accommodating portion 113 of the headrest frame 110 to cause the vibration member 151a to vibrate (or shift). The vibration element 151b can be set (or connected to) or configured at the vibration member 151a. For example, the vibration element 151b can be set (or connected to) or configured on one or more of the first surface and the second surface opposite to the first surface of the vibration member 151a. As one embodiment of the present disclosure, the vibration element 151b can be set (or connected to) or configured on the first surface of the vibration member 151a. As another embodiment of the present disclosure, the vibration element 151b can be set (or connected to) or configured on the second surface of the vibration member 151a. As another embodiment of the present disclosure, the vibration element 151b can be set (or connected to) or configured on each of the first surface and the second surface of the vibration member 151a. For example, the vibration element 151b can have a bimorph structure with the vibration member 151a interposed therebetween.

[0113] Reference Figures 3 to 5 Each of the first vibration device 151-1 and the second vibration device 151-2 according to an embodiment of the present disclosure may further include an adhesive member 151c. For example, the vibration element 151b may be connected (or bonded) to the vibration member 151a using the adhesive member 151c.

[0114] In the first vibration device 151-1, the vibration element 151b can be connected (or bonded) to one or more of the first surface and the second surface opposite to the first surface of the vibration member 151a by using an adhesive member 151c. For example, the vibration element 151b can be connected (or bonded) to the rear surface of the vibration member 151a by using an adhesive member 151c and can be spaced apart from the bottom surface of the first accommodating portion 113a of the accommodating portion 113. For example, the vibration element 151b of the first vibration device 151-1 can vibrate the vibration member 151a to output the first sound (or right channel sound). The vibration member 151a of the first vibration device 151-1 can vibrate based on the vibration (or displacement or drive) of the vibration element 151b to output (or generate) the first sound.

[0115] In the second vibration device 151-2, the vibration element 151b can be connected (or bonded) to one or more of the first surface and the second surface opposite to the first surface of the vibration member 151a by using an adhesive member 151c. For example, the vibration element 151b can be connected (or bonded) to the rear surface of the vibration member 151a by using an adhesive member 151c and can be spaced apart from the bottom surface of the second accommodating portion 113b of the accommodating portion 113. For example, the vibration element 151b of the second vibration device 151-2 can vibrate the vibration member 151a to output the second sound (or left channel sound). The vibration member 151a of the second vibration device 151-2 can vibrate based on the vibration (or displacement or drive) of the vibration element 151b to output (or generate) the second sound.

[0116] Reference Figures 3 to 5 , the sound emitting device 150 according to an embodiment of the present disclosure may further include a cover 155 .

[0117] The cover 155 can be configured to absorb impact applied to the headrest frame 110 and / or the vibration device 151. The cover 155 can be configured at the vibration device 151 or the vibration element 151b of the vibration device 151. For example, the cover 155 can be configured to cover the vibration device 151 or the vibration element 151b of the vibration device 151. The cover 155 can be configured at the front surface of the headrest frame 110 and the front surface of the vibration device 151. For example, the cover 155 can be configured to cover the front surface of the headrest frame 110 and the front surface of the vibration device 151. The cover 155 can be configured at the protrusion 112 of the headrest frame 110 and the first and second vibration devices 151-1 and 151-2 of the vibration device 151. For example, the cover 155 can be configured to cover the protrusion 112 of the headrest frame 110 and the first and second vibration devices 151-1 and 151-2 of the vibration device 151.

[0118] Although the reference Figure 1 —5 describes that the base frame 111 and the cover 155 are separate components, but the present disclosure is not limited thereto. For example, the base frame 111 and the cover 155 may be integrally formed into a housing. The housing may have a receiving portion 113 and include an open front.

[0119] The cover 155 according to an embodiment of the present disclosure may be located between the headrest frame 110 and the buffer member 130. For example, the cover 155 may be disposed or arranged between the front surface of the headrest frame 110 and the buffer member 130 and cover the vibration device 151. For example, the cover 155 may be disposed or arranged between the front surface of the headrest frame 110 and the buffer member 130 and cover the first vibration device 151-1 and the second vibration device 151-2 of the vibration device 151.

[0120] According to an embodiment of the present disclosure, the cover 155 can be configured to have the same size and shape as the headrest frame 110 and / or the cushioning member 130, but the embodiments of the present disclosure are not limited to this. For example, the cover 155, the headrest frame 110, and the cushioning member 130 can be configured to have the same size and the same shape, but the embodiments of the present disclosure are not limited to this. For example, the cover 155 can include a material capable of absorbing impact. For example, the cover 155 can include a foam material or a sponge material, but the embodiments of the present disclosure are not limited to this. For example, the cover 155 can be a cushion cover, a foam cover, a sponge cover, or a cushioning cover, but the embodiments of the present disclosure are not limited to this.

[0121] The cover 155 according to an embodiment of the present disclosure may include a plate 155 a and a sidewall 155 b .

[0122] The plate 155a may be located between the headrest frame 110 and the buffer member 130. The plate 155a may be configured on the front surface of the headrest frame 110. For example, the plate 155a may be configured to cover the front surface of the headrest frame 110. The plate 155a may be disposed or configured between the front surface of the headrest frame 110 and the buffer member 130. For example, the plate 155a may be disposed or configured between the front surface of the headrest frame 110 and the buffer member 130 and cover the vibration device 151. For example, the plate 155a may be configured to have the same size and the same shape as the headrest frame 110 and / or the buffer member 130, but embodiments of the present disclosure are not limited thereto. For example, the plate 155a may be a pad, a foam board, a sponge board, or a buffer board, but embodiments of the present disclosure are not limited thereto.

[0123] The sidewall 155b may be located between the plate 155a and the headrest frame 110. The sidewall 155b may be connected to or configured at an edge portion of the plate 155a and an edge portion of the headrest frame 110. The sidewall 155b may be configured to provide a space between the plate 155a and the headrest frame 110. For example, the sidewall 155b may be a cover sidewall, a pad sidewall, a foam sidewall, a sponge sidewall, or a cushioning sidewall, but embodiments of the present disclosure are not limited thereto.

[0124] The cover 155 according to an embodiment of the present disclosure may include a sound-emitting portion 155h.

[0125] The sound-emitting portion 155h may be configured to overlap (or correspond to) the vibration device 151. For example, the sound-emitting portion 155h may be a path through which the sound generated (or output) by the sound-emitting device 150 or the vibration device 151 is output to the outside (or the buffer member 130). For example, the sound-emitting portion 155h may be configured to pass through the cover 155 along the thickness direction Z of the cover 155. For example, the sound-emitting portion 155h may be configured to pass through the plate 155a along the thickness direction Z of the cover 155.

[0126] The cover 155 according to an embodiment of the present disclosure may include a first sound emitting portion 155h1 and a second sound emitting portion 155h2.

[0127] The first sound-emitting portion 155h1 may overlap (or correspond to) the first vibration device 151-1 or the vibration element 151b of the first vibration device 151-1. The first sound-emitting portion 155h1 may be a path through which the sound generated (or output) by the first vibration device 151-1 is output to the outside (or the buffer member 130). For example, the first sound-emitting portion 155h1 may be configured to pass through (or vertically pass through) a first area of the cover 155 that overlaps (or corresponds to) the first vibration device 151-1 along the thickness direction Z of the cover 155. For example, the first sound-emitting portion 155h1 may be configured to pass through (or vertically pass through) a first area of the plate 155a that overlaps (or corresponds to) the first vibration device 151-1 along the thickness direction Z of the cover 155.

[0128] The second sound-emitting portion 155h2 may overlap (or correspond to) the second vibration device 151-2 or the vibration element 151b of the second vibration device 151-2. The second sound-emitting portion 155h2 may be a path through which the sound generated (or output) by the second vibration device 151-2 is output to the outside (or the buffer member 130). For example, the second sound-emitting portion 155h2 may be configured to pass through (or vertically pass through) the second area of the cover 155 that overlaps (or corresponds to) the second vibration device 151-2 along the thickness direction Z of the cover 155. For example, the second sound-emitting portion 155h1 may be configured to pass through (or vertically pass through) the second area of the plate 155a that overlaps (or corresponds to) the second vibration device 151-2 along the thickness direction Z of the cover 155.

[0129] Each of the first sound emitting portion 155h1 and the second sound emitting portion 155h2 according to an embodiment of the present disclosure may be configured to include one or more holes (or sound holes or sound outlet holes).

[0130] Each of the first sound emitting part 155h1 and the second sound emitting part 155h2 according to another embodiment of the present disclosure may be configured to include one or more holes (or sound holes or sound outlet holes) based on the mesh structure 155m.

[0131] Reference Figure 1 and Figure 2The cover member 190 may be the outermost member configured to surround the headrest 10. The cover member 190 may be configured on the rear surface 111r and side surfaces of the headrest frame 110 and the front surface and side surfaces of the cushioning member 130. For example, the cover member 190 may be configured to cover the rear surface 111r and side surfaces of the headrest frame 110 and the front surface and side surfaces of the cushioning member 130. The cover member 190 may be configured to cover the rear surface 111r and side surfaces of the headrest frame 110, the side surfaces of the sound-emitting device 150, and the front surface and side surfaces of the cushioning member 130. For example, the cover member 190 may be configured to cover the rear surface 111r and side surfaces of the headrest frame 110, the side surfaces of the sound-emitting device 150, and the front surface and side surfaces of the cushioning member 130. The cover member 190 may be configured to cover the rear surface 111r and side surfaces of the headrest frame 110, the side surfaces of the cover 155 of the sound-emitting device 150, and the front surface and side surfaces of the cushioning member 130. For example, the cover member 190 may be configured to cover the rear surface 111 r and side surfaces of the headrest frame 110 , the side surfaces of the cover 155 of the sound generating device 150 , and the front surface and side surfaces of the cushioning member 130 .

[0132] The sheath member 190 may be a fiber material or a leather material, but the embodiments of the present disclosure are not limited thereto. For example, the sheath member 190 of the fiber material may include at least one of synthetic fiber, carbon fiber (or aramid fiber), and natural fiber, but the embodiments of the present disclosure are not limited thereto. For example, the sheath member 190 of the fiber material may be a woven sheet, a knitted sheet, or a non-woven fabric, but the embodiments of the present disclosure are not limited thereto. For example, the sheath member 190 of the fiber material may be a fabric member, but the embodiments of the present disclosure are not limited thereto.

[0133] The synthetic fiber may be a thermoplastic resin and may include a polyolefin-based fiber as an environmentally friendly material that releases relatively few harmful substances. For example, the polyolefin-based fiber may include a polyethylene fiber, a polypropylene fiber, or a polyethylene terephthalate fiber, but the embodiments of the present disclosure are not limited thereto. The polyolefin-based fiber may be a fiber of a single resin or a fiber of a core-shell structure, but the embodiments of the present disclosure are not limited thereto. The natural fiber may be a composite fiber of one or more of jute fiber, kenaf fiber, abaca fiber, coconut fiber, and wood fiber, but the embodiments of the present disclosure are not limited thereto.

[0134] The sheath member 190 of the leather material may include natural leather or artificial leather, but the embodiments of the present disclosure are not limited thereto.

[0135] Reference Figures 2 to 5 , the headrest 10 according to the embodiment of the present disclosure may further include a cushion pad 170 .

[0136] The cushioning pad 170 may be accommodated in the cushioning member 130. For example, the cushioning pad 170 may be located between the sheath member 190 and the cushioning member 130. For example, the cushioning pad 170 may be located between the hollow portion 131 of the cushioning member 130 and the sheath member 190. For example, the cushioning pad 170 may be accommodated in the hollow portion 131 and may be covered by the sheath member 190. For example, the cushioning pad 170 may have a shape capable of being accommodated in the hollow portion 131.

[0137] According to an embodiment of the present disclosure, the cushion 170 may be a path through which the sound generated (or output) by the vibration device 151 is output. The cushion 170 may be accommodated in the hollow portion 131 of the cushion member 130 and may be configured (or provided) to cover the sound-emitting portion 155h of the sound-emitting device 150. The cushion 170 may be accommodated in the hollow portion 131 of the cushion member 130 and may be supported by the cover 155 of the sound-emitting device 150. The rear surface of the cushion 170 may be supported by the mesh structure 155m in the sound-emitting portion 155h.

[0138] According to an embodiment of the present disclosure, the sound generated by the sound emitting device 150 or the vibration device 151 may be output to the outside through the sound emitting portion 155 h of the cover 155 and the buffer pad 170 .

[0139] The cushioning pad 170 according to an embodiment of the present disclosure may include a first cushioning pad 171 and a second cushioning pad 172 .

[0140] The first cushion 171 may be received in the first hollow portion 131a of the cushion member 130. For example, the first cushion 171 may be located between the first hollow portion 131a and the sheath member 190. For example, the first cushion 171 may be received in the first hollow portion 131a and may be covered by the sheath member 190. For example, the first cushion 171 may include a shape capable of being received in the first hollow portion 131a.

[0141] According to an embodiment of the present disclosure, the first cushion 171 can be a path through which the sound generated (or output) by the first vibration device 151-1 is output. The first cushion 171 can be accommodated in the first hollow portion 131a of the buffer member 130 and can be configured (or arranged) to cover the first sound-emitting portion 155h1 of the sound-emitting device 150. For example, the first cushion 171 can be accommodated in the first hollow portion 131a and can be configured (or arranged) to cover the first sound-emitting portion 155h1 of the cover 155 of the sound-emitting device 150. The rear surface of the first cushion 171 can be supported by the mesh structure 155m in the first sound-emitting portion 155h1.

[0142] The second cushioning pad 172 may be received in the second hollow portion 131b of the cushioning member 130. For example, the second cushioning pad 172 may be located between the second hollow portion 131b and the sheathing member 190. For example, the second cushioning pad 172 may be received in the second hollow portion 131b and may be covered by the sheathing member 190. For example, the second cushioning pad 172 may include a shape capable of being received in the second hollow portion 131b.

[0143] According to an embodiment of the present disclosure, the second cushion 172 can be a path through which the sound generated (or output) by the second vibration device 151-2 is output. The second cushion 172 can be accommodated in the second hollow portion 131b of the buffer member 130 and can be configured (or arranged) to cover the second sound-emitting portion 155h2 of the sound-emitting device 150. For example, the second cushion 172 can be accommodated in the second hollow portion 131b and can be configured (or arranged) to cover the second sound-emitting portion 155h2 of the cover 155 of the sound-emitting device 150. The rear surface of the second cushion 172 can be supported by the mesh structure 155m in the second sound-emitting portion 155h2.

[0144] The cushion 170 (or the first cushion 171 or the second cushion 172) may include a material that can output sound and absorb impact. For example, the cushion 170 (or the first cushion 171 or the second cushion 172) may include a foam material or a sponge material, but the embodiments of the present disclosure are not limited thereto.

[0145] According to another embodiment of the present disclosure, the cushion pad 170 (or the first cushion pad 171 or the second cushion pad 172) may include a porous material, but the embodiments of the present disclosure are not limited thereto. For example, the cushion pad 170 (or the first cushion pad 171 or the second cushion pad 172) may include a porous material having a plurality of holes 170h. For example, the plurality of holes 170h may be arranged regularly or irregularly. For example, the cushion pad 170 may include an air mesh material. For example, the cushion pad 170 may include a plurality of holes (or sound holes) 170h and a cushioning layer having a mesh material.

[0146] Reference Figures 3 to 5 , the headrest 10 according to the embodiment of the present disclosure may further include a sound blocking member 180 .

[0147] The sound blocking member 180 may be configured to block sound output in the rearward direction of the headrest frame 110. For example, the sound blocking member 180 may be located between the headrest frame 110 and the cover member 190. For example, the sound blocking member 180 may be located between the rear surface 111r of the headrest frame 110 and the cover member 190. The sound blocking member 180 may be provided (or configured) on or connected (or incorporated) to the rear surface 111r of the headrest frame 110 and may be covered by the cover member 190. For example, the sound blocking member 180 may be connected (or incorporated) or attached to the rear surface 111r of the headrest frame 110 and may be covered by the cover member 190.

[0148] The sound blocking member 180 may include a material for blocking or absorbing sound. For example, the sound blocking member 180 may include rubber, but the embodiments of the present disclosure are not limited thereto. For example, the sound blocking member 180 may be ethylene propylene diene monomer (EPDM) or polyurethane rubber, but the embodiments of the present disclosure are not limited thereto. For example, the ethylene propylene diene monomer (EPDM) may be ethylene propylene diene monomer (EPDM), but the embodiments of the present disclosure are not limited thereto.

[0149] The headrest 10 according to an embodiment of the present disclosure may include a sound-generating device 150 or a vibration device 151, and thus, may output a sound generated based on the vibration (or displacement or drive) of the sound-generating device 150 or the vibration device 151. For example, the headrest 10 may output a two-channel stereo sound including a left-channel sound and a right-channel sound generated based on the vibration (or displacement or drive) of the first vibration device 151-1 and the second vibration device 151-2 of the vibration device 151. For example, the headrest 10 according to an embodiment of the present disclosure may output a sound generated based on the vibration (or displacement or drive) of the sound-generating device 150 or the vibration device 151 including a piezoelectric material, and thus, may output a clear sound in the mid- and high-frequency bands. For example, the headrest 10 according to an embodiment of the present disclosure may be configured to output a sound of approximately 200 Hz to approximately 20 kHz.

[0150] Figure 6 is a perspective view illustrating a headrest according to another embodiment of the present disclosure. Figure 7 It shows that it has been removed Figure 6 A perspective view of an embodiment of a cover member on a headrest is shown. Figure 8 is a plan view illustrating a headrest according to another embodiment of the present disclosure.

[0151] Reference Figure 6 and Figure 7According to another embodiment of the present disclosure, the headrest 20 can be configured to output sound. For example, the headrest 20 can be configured to output left-channel sound and right-channel sound. For example, the headrest 20 can be configured to output two-channel stereo sound including left-channel sound and right-channel sound. For example, the headrest 20 can be a headrest device, a headrest speaker, a headrest speaker device, a headrest for a chair, a headrest speaker for a chair, a headrest speaker device for a chair, a headrest for a vehicle, a headrest speaker for a vehicle, or a headrest speaker device for a vehicle, but the embodiments of the present disclosure are not limited thereto.

[0152] The headrest 20 according to another embodiment of the present disclosure may include a first sound emitting device 300 - 1 , a second sound emitting device 300 - 2 , and a cover member 290 .

[0153] The headrest portion 200 may be configured to absorb impact. For example, the headrest portion 200 may include a quadrilateral shape or a quadrilateral shape with a curved portion, but the embodiments of the present disclosure are not limited thereto. For example, the headrest portion 200 may be configured to accommodate a driving circuit unit for driving the first sound-emitting device 300-1 and the second sound-emitting device 300-2.

[0154] The first sound emitting device 300-1 may be located on the first side 200a of the headrest portion 200. The first sound emitting device 300-1 may be configured to be connected (or supported) or fixed (or coupled) to the first side 200a of the headrest portion 200. For example, the first sound emitting device 300-1 may be configured to be connected (or supported) or fixed (or coupled) to the first side 200a of the headrest portion 200 via one or more first connecting members 215a. For example, the first side 200a of the headrest portion 200 may be a first side surface, a first side wall, a first short side, a left surface, a left side wall, or a left short side, but the embodiments of the present disclosure are not limited thereto.

[0155] According to an embodiment of the present disclosure, the first sound emitting device 300-1 may be configured to tilt (or rotate) from the first side 200a of the headrest portion 200. For example, the first sound emitting device 300-1 may be configured to tilt (or rotate) from the first side 200a of the headrest portion 200 at a predetermined first angle (θ1). For example, the length direction of the headrest portion 200 may intersect with the length direction of the first sound emitting device 300-1. For example, when the length direction of the headrest portion 200 is parallel to the first direction X or the X-axis direction X, the length direction of the first sound emitting device 300-1 may intersect with the first direction X or the X-axis direction X. For example, as Figure 8 As shown, relative to the length direction of the headrest portion 200 and the length direction of the first sound emitting device 300-1, the first angle (θ1) between the headrest portion 200 and the first sound emitting device 300-1 can be an acute angle, for example, it can be 30 degrees, but the embodiments of the present disclosure are not limited to this.

[0156] The first sound emitting device 300-1 may be configured to include a piezoelectric material and may vibrate (or displace) according to a piezoelectric effect based on a driving signal and output (or generate) sound (or sound waves).

[0157] The second sound emitting device 300-2 may be located on a second side 200b of the headrest portion 200 opposite to the first side 200a. The second sound emitting device 300-2 may be configured to be connected (or supported) or fixed (or coupled) to the second side 200b of the headrest portion 200. For example, the second sound emitting device 300-2 may be configured to be connected (or supported) or fixed (or coupled) to the second side 200b of the headrest portion 200 via one or more second connecting members 215b. For example, the second side 200b of the headrest portion 200 may be a second side surface, a second side wall, a second short side, a right surface, a right side wall, or a right short side, but the embodiments of the present disclosure are not limited thereto.

[0158] The second sound emitting device 300-2 according to an embodiment of the present disclosure may be configured to tilt (or rotate) from the second side 200b of the headrest portion 200. For example, the second sound emitting device 300-2 may be configured to tilt (or rotate) from the second side 200b of the headrest portion 200 at a predetermined second angle (θ2). For example, the length direction of the headrest portion 200 may intersect with the length direction of the second sound emitting device 300-2. For example, when the length direction of the headrest portion 200 is parallel to the first direction X or the X-axis direction X, the length direction of the first sound emitting device 300-1 may intersect with the first direction X or the X-axis direction X. For example, as Figure 8 As shown, the second angle (θ2) between the headrest 200 and the second sound emitting device 300-2 can be an acute angle relative to the length direction of the headrest 200 and the length direction of the second sound emitting device 300-2. For example, the second angle (θ2) between the headrest 200 and the second sound emitting device 300-2 can be the same as or different from the first angle (θ1) between the headrest 200 and the first sound emitting device 300-1. For example, the second angle (γ2) between the headrest 200 and the second sound emitting device 300-2 can be 30 degrees, but embodiments of the present disclosure are not limited to this.

[0159] According to an embodiment of the present disclosure, the first sound emitting device 300-1 and the second sound emitting device 300-2 can be set in different directions with the headrest portion 200 arranged therebetween. For example, each of the first sound emitting device 300-1 and the second sound emitting device 300-2 can be set to face an arbitrary virtual point in the forward direction of the headrest portion 200. For example, the distance (or the shortest distance) between an arbitrary virtual point and the first sound emitting device 300-1 can be equal to the distance (or the shortest distance) between an arbitrary virtual point and the second sound emitting device 300-2, but the embodiments of the present disclosure are not limited thereto. For example, each of the first sound emitting device 300-1 and the second sound emitting device 300-2 can have a symmetrical structure relative to the headrest portion 200, but the embodiments of the present disclosure are not limited thereto.

[0160] According to another embodiment of the present disclosure, each of the first sound emitting device 300-1 and the second sound emitting device 300-2 may have an asymmetric structure relative to the headrest portion 200. For example, the first angle (θ1) between the headrest portion 200 and the first sound emitting device 300-1 may be different from the second angle (θ2) between the headrest portion 200 and the second sound emitting device 300-2. For example, the distance (or the shortest distance) between any virtual point and the first sound emitting device 300-1 may be different from the distance (or the shortest distance) between any virtual point and the second sound emitting device 300-2.

[0161] The second sound emitting device 300-2 may be configured to include a piezoelectric material and may vibrate (or displace) according to a piezoelectric effect based on a driving signal and output (or generate) sound (or sound waves).

[0162] According to an embodiment of the present disclosure, the first sound-emitting device 300-1 can be configured to output a first sound (or right-channel sound). The second sound-emitting device 300-2 can be configured to output a second sound (or left-channel sound). Therefore, the headrest 20 according to another embodiment of the present disclosure can generate (or output) a two-channel stereo sound including a first sound generated by the first sound-emitting device 300-1 and a second sound generated by the second sound-emitting device 300-2.

[0163] The cover member 190 may be an outermost member configured to surround the headrest 20. For example, the cover member 190 may be configured to surround the headrest portion 200, the first sound emitting device 300-1, and the second sound emitting device 300-2. For example, the cover member 190 may be a fiber material or a leather material. For example, the cover member 190 may be the same as that described above with reference to FIG. Figure 1 The described sheath member 190 is the same or substantially the same, and therefore, repeated description thereof is omitted.

[0164] The headrest 20 according to another embodiment of the present disclosure may include a first sound emitting device 300-1 and a second sound emitting device 300-2, and thus, may output a first sound based on the first sound emitting device 300-1 and a second sound based on the second sound emitting device 300-2. For example, the headrest 20 may output a two-channel stereo sound including a right channel sound and a left channel sound based on the vibration (or displacement or drive) of the first sound emitting device 300-1 and the second sound emitting device 300-2. For example, the headrest 20 according to another embodiment of the present disclosure may output a first sound (or a right channel sound) and a second sound (or a left channel sound) in the clear mid-high frequency band based on the vibration (or displacement or drive) of the first sound emitting device 300-1 and the second sound emitting device 300-2 including piezoelectric material. For example, the headrest 10 according to another embodiment of the present disclosure may output a first sound and a second sound in the frequency range of approximately 200 Hz to approximately 20 kHz.

[0165] Figure 9 The present invention is shown in FIG. Figures 6 to 8 An exploded perspective view of the headrest portion is shown.

[0166] Reference Figure 8 and Figure 9 , the headrest portion 200 according to an embodiment of the present disclosure may include a headrest frame 210 and a buffer member 230 .

[0167] The headrest portion 200 or the headrest frame 210 may be the main body, main structure, shell, or housing of the headrest 10, but the embodiments of the present disclosure are not limited thereto. For example, the headrest portion 200 or the headrest frame 210 may include a quadrilateral shape or a quadrilateral shape with a curved portion, but the embodiments of the present disclosure are not limited thereto.

[0168] The headrest portion 200 or the headrest frame 210 according to the embodiment of the present disclosure may be made of a plastic material such as plastic or styrene material, but the embodiment of the present disclosure is not limited thereto. For example, the material of the headrest portion 200 or the headrest frame 210 may be the same as that described above. Figures 1 to 5 The materials of the described headrest portion 100 or the headrest frame 110 are the same or substantially the same, and thus, repeated description thereof is omitted.

[0169] The headrest frame 210 according to an embodiment of the present disclosure may be configured to accommodate a driving circuit portion for driving the first sound emitting device 300 - 1 and the second sound emitting device 300 - 2 .

[0170] The cushioning member 230 may be located on the front surface 211f of the headrest frame 210. For example, the cushioning member 230 may be configured to cover the front surface 211f of the headrest frame 210. For example, the cushioning member 230 may be configured to have the same size and shape as the headrest frame 210, but embodiments of the present disclosure are not limited thereto. For example, the cushioning member 230 may include a material that absorbs shock.

[0171] The buffer member 230 according to an embodiment of the present disclosure may include a foam material or a sponge material, but the embodiment of the present disclosure is not limited thereto.

[0172] According to another embodiment of the present disclosure, the buffer member 230 may include a porous material, but the embodiments of the present disclosure are not limited thereto. For example, the buffer member 230 may include a porous material having a plurality of holes. For example, the plurality of holes may be arranged regularly or irregularly. For example, the buffer member 230 may include an air mesh material, but the embodiments of the present disclosure are not limited thereto. For example, the buffer member 230 may include a plurality of holes (or sound through holes) and a buffer layer having a mesh material.

[0173] The headrest portion 200 according to the embodiment of the present disclosure may further include a support rod portion 240 .

[0174] The support rod portion 240 according to an embodiment of the present disclosure may be configured to be connected (or coupled) to the lower surface of the headrest portion 200 or the headrest frame 210, or may be configured to support the lower surface of the headrest portion 200 or the headrest frame 210. For example, the support rod portion 240 may include one or more support rods 242.

[0175] One or more support rods 242 may be configured to be connected to the lower surface of the headrest portion 200 or the headrest frame 210. For example, the support rod portion 240 may include a pair of support rods 242. For example, the one or more support rods 242 may be connected to the upper portion of the seatback of a vehicle seat or the backrest frame of a chair.

[0176] The support rod portion 240 according to another embodiment of the present disclosure may be configured to be connected (or coupled) to the rear surface of the headrest portion 200 or the headrest frame 210 , or may be configured to support the rear surface of the headrest portion 200 or the headrest frame 210 .

[0177] The support rod portion 240 according to another embodiment of the present disclosure may include a support frame 241 and one or more support rods 242 .

[0178] The support frame 241 may be configured to be connected (or coupled) to the rear surface of the headrest portion 200 or the headrest frame 210, or may be configured to support the rear surface of the headrest portion 200 or the headrest frame 210. The support frame 241 may be configured to cover the rear surface of the headrest portion 200 or the headrest frame 210.

[0179] One or more support rods 242 may be configured to connect to the lower surface and rear surface of the headrest frame 210. For example, the support rod portion 240 may include a pair of support rods 242, but embodiments of the present disclosure are not limited thereto. For example, one or more (or a pair of) support rods 242 may connect to the upper portion of the seatback of a vehicle seat or the backrest frame of a chair.

[0180] The support rod portion 240 according to another embodiment of the present disclosure may further include a first support plate 243 and a second support plate 244 .

[0181] The first support plate 243 may be connected to the support frame 241 and may be configured to support one or more (or a pair of) support rods 242. For example, the first support plate 243 may be connected (or coupled) to a lower surface of the support frame 241 and may be configured to jointly support one or more (or a pair of) support rods 242.

[0182] According to an embodiment of the present disclosure, one or more (or a pair of) support rods 242 may be connected (or coupled) to the first support plate 243 via a first fastening member. For example, the first fastening member may be fastened to the upper surface of each of the one or more (or a pair of) support rods 242 via the first support plate 243. For example, each of the plurality of first fastening members may be a screw or a bolt, but the embodiments of the present disclosure are not limited thereto.

[0183] According to an embodiment of the present disclosure, the first support plate 243 may be connected (or coupled) to the lower surface of the support frame 241 via a plurality of second fastening members. For example, the plurality of second fastening members may be fastened to the lower surface of the support frame 241 via the first support plate 243. For example, each of the plurality of second fastening members may be a screw or a bolt, but the embodiment of the present disclosure is not limited thereto.

[0184] The second support plate 244 can be connected (or coupled) to the rear surface of the support frame 241. For example, the second support plate 244 can be connected (or coupled) to one side of the first support plate 243 and can be connected (or coupled) to the rear surface of the support frame 241. For example, the second support plate 244 can protrude from one side of the first support plate 243 or protrude vertically, but embodiments of the present disclosure are not limited thereto. For example, the second support plate 244 can be integrally provided (or integrated) with the first support plate 243.

[0185] According to an embodiment of the present disclosure, the second support plate 244 may be connected (or coupled) to the rear surface of the support frame 241 through a plurality of third fastening members. For example, the plurality of third fastening members may be fastened to the rear surface of the support frame 241 through the second support plate 244. For example, each of the plurality of third fastening members may be a screw or a bolt, but the embodiment of the present disclosure is not limited thereto.

[0186] The headrest portion 200 according to the embodiment of the present disclosure may further include one or more first connection members 215 a and one or more second connection members 215 b .

[0187] One or more first connecting members 215a may protrude from the first side 200a of the headrest frame 210 or the headrest portion 200 to have a predetermined length. The one or more first connecting members 215a may be configured to tilt (or rotate) from the first side 200a of the headrest frame 210 or the headrest portion 200 at a predetermined first angle (θ1). The one or more first connecting members 215a may be connected to a surface of the first sound-emitting device 300-1. For example, an end of each of the one or more first connecting members 215a may be inserted into the surface of the first sound-emitting device 300-1.

[0188] One or more second connecting members 215b may protrude from the second side 200b of the headrest frame 210 or the headrest portion 200 to have a predetermined length. One or more second connecting members 215b may be configured to tilt (or rotate) from the second side 200b of the headrest frame 210 or the headrest portion 200 at a predetermined second angle (θ2). One or more second connecting members 215b may be connected to one surface of the second sound-emitting device 300-2. For example, an end (or one side) of each of the one or more second connecting members 215b may be inserted into the one surface of the second sound-emitting device 300-2.

[0189] Figure 10 The present invention is shown in FIG. Figures 6 to 8 An exploded perspective view of the first sound emitting device is shown. Figure 11 It is along Figure 10 A cross-sectional view taken along line III-III' is shown.

[0190] Reference Figure 8 、 Figure 10 and Figure 11 , the first sound emitting device 300 - 1 according to an embodiment of the present disclosure may include a housing 310 , a vibration device 351 and a buffer member 370 .

[0191] The housing 310 may be located on the first side 200a of the headrest portion 200. The first sound-emitting device 300-1 may be configured to be connected (or supported) or fixed (or coupled) to the first side 200a of the headrest portion 200. For example, the housing 310 may be configured to support the vibration device 351 and surround the vibration device 351. The housing 310 may include a quadrilateral shape or a quadrilateral shape with a curved portion, but embodiments of the present disclosure are not limited thereto.

[0192] The housing 310 may be located at the vibration device 351. The housing 310 may be configured to support the vibration device 351. For example, the housing 310 may be configured to support the vibration device 351 and surround the vibration device 351. For example, the housing 310 may be configured to accommodate (or receive) the vibration device 351. For example, the housing 310 may be a housing, a shell, a shell member, a shell member, a cabinet, a speaker, etc., but the embodiments of the present disclosure are not limited thereto.

[0193] The housing 310 according to an embodiment of the present disclosure may be made of a plastic material such as plastic or styrene material, but the embodiment of the present disclosure is not limited thereto. For example, the material of the housing 310 may be the same as that described above. Figures 1 to 5 The materials of the described headrest portion 100 or the headrest frame 110 are the same or substantially the same, and thus, repeated description thereof is omitted.

[0194] The housing 310 according to an embodiment of the present disclosure may include a bottom plate 311 , a sidewall frame 312 , and a receiving portion 313 .

[0195] The bottom plate 311 may include a quadrilateral shape or a quadrilateral shape with a curved portion, but the embodiments of the present disclosure are not limited thereto. The bottom plate 311 may include a first surface (or front surface) 311 a and a second surface (or rear surface) 311 r.

[0196] The side wall frame 312 may be formed or arranged along the edge of the bottom plate 311. The side wall frame 312 may protrude from the edge of the first surface 311a of the bottom plate 311. For example, the side wall frame 312 may be connected or perpendicularly connected to the edge of the first surface 311a of the bottom plate 311.

[0197] The receiving portion 313 may be configured to receive or support the vibration device 351. For example, the receiving portion 313 may be formed or configured on the first surface 311a of the bottom plate 311 surrounded by the sidewall frame 312. For example, the receiving portion 313 may be a receiving space, a groove, a receiving groove, or a supporting groove, but the embodiments of the present disclosure are not limited thereto.

[0198] The housing 310 according to an embodiment of the present disclosure may further include one or more connection portions (or coupling portions) 315 .

[0199] One or more connecting portions 315 may be formed or configured at the first side 311s of the housing 310. The one or more connecting portions 315 may be connected or coupled to the Figure 8 and Figure 9 The one or more first connection members 215a of the headrest portion 200 are described. Therefore, the first sound emitting device 300-1 or the housing 310 can be tilted (or rotated) from the first side 200a of the headrest portion 200 at a predetermined first angle (γ1).

[0200] The vibration device 351 can be located between the housing 310 and the buffer member 370 and can be configured to output the first sound (or the right channel sound). The vibration device 351 can be accommodated in the accommodation portion 313 of the housing 310 or supported by the accommodation portion 313 of the housing 310 and output the first sound. For example, the vibration device 351 can be configured to be supported by the first support portion 314a of the housing 310. For example, the edge portion of the vibration device 351 can be configured to be supported by the first support portion 314a.

[0201] The first support portion 314a of the housing 310 can be arranged along an edge portion of the accommodating portion 313. The first support portion 314a of the housing 310 can be configured to support an edge portion of the vibration device 351. For example, the first support portion 314a can protrude from the inner surface of the accommodating portion 313 to the center portion of the accommodating portion 313. For example, the upper surface (or supporting surface) of the first support portion 314a can be located between the bottom surface of the accommodating portion 313 and the upper surface of the sidewall frame 312. For example, the vibration device 351 can be supported by the upper surface of the first support portion 314a, and therefore, the vibration device 351 can be accommodated in the accommodating portion 313 and can be surrounded by the sidewall frame 312.

[0202] The vibration device 351 according to an embodiment of the present disclosure can be configured to include a piezoelectric material. The vibration device 351 can vibrate (or shift) and output (or generate) sound (or sound waves) according to the piezoelectric effect based on the drive signal (or vibration drive signal or voice signal). For example, the vibration device 351 can be a piezoelectric vibration device including a piezoelectric material. For example, the vibration device 351 can include a piezoelectric material, and therefore, a clear sound in the mid- and high-frequency bands can be output. For example, the vibration device 351 can be configured to output a sound of about 200 Hz to about 20 kHz.

[0203] The vibration device 351 according to an embodiment of the present disclosure may include a vibration member 351 a and a vibration element 351 b .

[0204] The vibration member 351a can output the first sound based on the vibration (or displacement) of the vibration element 351b. For example, the vibration member 351a can be a diaphragm, a vibration plate, a vibration substrate, a vibration panel, a sound plate, a passive vibration plate, a passive vibration member, a passive vibration panel, a sound output plate, or a sound vibration plate, but the embodiments of the present disclosure are not limited thereto.

[0205] The vibration member 351a may include a single non-metal material or a composite non-metal material, but the embodiment of the present disclosure is not limited thereto. For example, the material of the vibration member 351a may be the same as that described above. Figure 4 and Figure 5 The materials of the described headrest portion 200 or the vibration member 151 a are the same or substantially the same, and thus, repeated description thereof is omitted.

[0206] The vibration member 351a can be accommodated in the accommodation portion 313 of the housing 310 and can be connected or coupled to the first support portion 314a of the housing 310 by using the coupling member 353. For example, the vibration member 351a can be spaced apart from the bottom surface of the accommodation portion 313. For example, the center portion of the vibration member 351a other than the edge portion can be spaced apart from the bottom surface of the accommodation portion 313. The vibration member 351a can be configured at the accommodation portion 113. For example, the vibration member 351a can be configured to cover the accommodation portion 313. For example, the vibration member 351a can have the same shape as the accommodation portion 313 and can have a size larger than the accommodation portion 313 and cover the accommodation portion 313, but embodiments of the present disclosure are not limited thereto.

[0207] The coupling member 353 may be disposed (or inserted) between the housing 310 and the vibration member 351a. For example, the coupling member 353 may be disposed (or inserted) between the first support portion 314a of the housing 310 and the vibration member 351a. For example, the coupling member 353 may be disposed (or inserted) between the first support portion 314a and the rear edge of the vibration member 351a.

[0208] The vibration element 351b can be configured to vibrate (or displace) the vibration member 351a. For example, the vibration element 351b can be configured to vibrate (or displace or drive) the vibration member 351a by vibration (or displacement or drive) based on a drive signal (or vibration drive signal or voice signal). For example, the vibration element 351b can output (or generate) a first sound by using the vibration member 351a as a vibration plate. For example, the vibration element 351b may include a piezoelectric vibration element with a piezoelectric effect. For example, the vibration element 351b can be a vibration generating device, a vibration membrane, a vibration generating membrane, a vibrator, an active vibrator, an active vibration generator, an actuator, an exciter, a membrane actuator, a membrane exciter, an ultrasonic actuator or an active vibration member, etc., but the embodiments of the present disclosure are not limited thereto.

[0209] The vibration element 351b can be set (or connected to) or configured at the accommodating portion 313 of the housing 310 to vibrate (or displace) the vibration member 351a. The vibration element 351b can be set (or connected to) or configured at the vibration member 351a. For example, the vibration element 351b can be set (or connected to) or configured at one or more of the first surface and the second surface opposite to the first surface of the vibration member 351a. As one embodiment of the present disclosure, the vibration element 351b can be set (or connected to) or configured at the first surface of the vibration member 351a. As another embodiment of the present disclosure, the vibration element 351b can be set (or connected to) or configured at the second surface of the vibration member 351a. As another embodiment of the present disclosure, the vibration element 351b can be set (or connected to) or configured at each of the first surface and the second surface of the vibration member 351a. For example, the vibration element 351b can have a bimorph structure with the vibration member 351a interposed therebetween.

[0210] The vibration device 251 according to an embodiment of the present disclosure may further include an adhesive member 351c. For example, the vibration element 351b may be connected or coupled to the vibration member 351a using the adhesive member 351c.

[0211] The vibration element 351b can be connected (or bonded) to one or more of the first surface and the second surface opposite to the first surface of the vibration member 351a by using the adhesive member 351c. For example, the vibration element 351b can be connected (or bonded) to the rear surface of the vibration member 351a by using the adhesive member 351c and can be spaced apart from the bottom surface of the receiving portion 313 of the housing 310.

[0212] The first sound emitting device 300 - 1 according to an embodiment of the present disclosure may further include a cover 355 .

[0213] The cover 355 may be configured to absorb impact applied to the housing 310 and / or the vibration device 351. The cover 355 may be disposed at the vibration device 351. For example, the cover 355 may be configured to cover the vibration device 351. For example, the cover 355 may be located between the housing 310 and the buffer member 370. For example, the cover 355 may be disposed or arranged between the housing 310 and the buffer member 370 and cover the vibration device 351. For example, the cover 355 may be disposed or arranged between the vibration device 351 and the buffer member 370.

[0214] The cover 355 according to an embodiment of the present disclosure may be accommodated in the accommodation portion 313 of the housing 310 or supported by the accommodation portion 313 of the housing 310. For example, the cover 355 may be configured to be supported by the second support portion 314b of the housing 310. For example, an edge portion of the cover 355 may be configured to be supported by the second support portion 314b and cover the accommodation portion 313.

[0215] The second support portion 314b of the housing 310 can be arranged along the edge of the accommodating portion 313. The second support portion 314b of the housing 310 can be configured to support the edge of the cover 355. For example, the second support portion 314b can protrude from the inner surface of the upper side of the accommodating portion 313 to the center of the accommodating portion 313. For example, the upper surface (or support surface) of the second support portion 314b can be located between the first support portion 314a and the upper surface of the sidewall frame 312. For example, a portion of the cover 355 can be supported by the upper surface of the second support portion 314b, and therefore, a portion of the cover 355 can be accommodated in the accommodating portion 313 and can be surrounded by the sidewall frame 312.

[0216] The cover 355 according to an embodiment of the present disclosure may be connected (or coupled) to the housing 310 via a plurality of fastening members. For example, the plurality of fastening members may be fastened to the second support portion 314b of the housing 310 via the cover 355. For example, each of the plurality of fastening members may be a screw or a bolt, but the embodiments of the present disclosure are not limited thereto.

[0217] The cover 355 according to an embodiment of the present disclosure can be configured to have the same size and shape as the receiving portion 313 of the housing 310, but the embodiments of the present disclosure are not limited thereto. For example, the cover 355 can include a material that absorbs shock. For example, the cover 355 can include a foam material or a sponge material, but the embodiments of the present disclosure are not limited thereto. For example, the cover 355 can be a cushion cover, a foam cover, a sponge cover, or a cushion cover, but the embodiments of the present disclosure are not limited thereto.

[0218] The cover 155 according to an embodiment of the present disclosure may include a sound emitting portion 355h.

[0219] The sound emitting portion 355h may be configured to overlap (or correspond to) the vibration device 351. For example, the sound emitting portion 355h may be a path through which the first sound generated (or output) by the vibration device 351 is output to the outside (or the buffer member 370). For example, the sound emitting portion 355h may be configured to pass through the cover 355 along the thickness direction Z of the cover 355.

[0220] The sound emitting portion 355h according to an embodiment of the present disclosure may be configured to include one or more holes (or sound holes or sound outlet holes).

[0221] The sound emitting portion 355h according to another embodiment of the present disclosure may be configured to include one or more holes (or sound holes or sound outlet holes) based on the mesh structure 355m.

[0222] Reference Figure 6 、 Figure 10 and Figure 11 , the buffer member 370 may be configured to overlap (or correspond to) the vibration device 351. For example, the buffer member 370 may be located between the sheath member 290 and the vibration device 351. For example, the buffer member 370 may be located between the cover 355 and the sheath member 290. For example, the buffer member 370 may be a cushion, but embodiments of the present disclosure are not limited thereto.

[0223] According to an embodiment of the present disclosure, the buffer member 370 may be a path through which the first sound generated (or output) by the vibration device 351 is output. The buffer member 370 may be configured (or arranged) to cover the sound-emitting portion 355h. For example, the buffer member 370 may be supported by the cover 355. The rear surface of the buffer member 370 may be supported by the mesh structure 355m in the sound-emitting portion 355h of the cover 355.

[0224] The buffer member 370 according to an embodiment of the present disclosure may include a material that can output sound and absorb impact. For example, the buffer member 370 may include a foam material or a sponge material, but the embodiment of the present disclosure is not limited thereto.

[0225] According to another embodiment of the present disclosure, the buffer member 370 may include a porous material, but the embodiments of the present disclosure are not limited thereto. For example, the buffer member 370 may include a porous material including a plurality of holes 370h. For example, the plurality of holes 370h may be arranged regularly or irregularly. For example, the buffer member 370 may include an air mesh material. For example, the buffer member 370 may include a plurality of holes (or sound holes) 370h and a buffer layer having a mesh material.

[0226] According to an embodiment of the present disclosure, in the first sound emitting device 300 - 1 , the first sound generated by the vibration device 351 may be output to the outside through the sound emitting portion 355 h of the cover 355 and the buffer member 370 .

[0227] Reference Figure 8 、 Figure 10 and Figure 11 , the first sound emitting device 300 - 1 according to an embodiment of the present disclosure may further include a sound blocking member 380 .

[0228] The sound blocking member 380 can be configured to block the first sound output in the rearward direction of the housing 310. For example, the sound blocking member 380 can be located between the housing 310 and the cover member 290. For example, the sound blocking member 380 can be located between the rear surface 311r of the housing 310 and the cover member 290. The sound blocking member 380 can be provided (or configured) on or connected (or combined) to the rear surface 311r of the housing 310 and can be covered by the cover member 290. For example, the sound blocking member 380 can be connected (or combined) or attached to the rear surface 311r of the housing 310 and can be covered by the cover member 290.

[0229] The sound blocking member 380 may include a material for blocking or absorbing sound. For example, the sound blocking member 380 may include rubber, but the embodiments of the present disclosure are not limited thereto. For example, the sound blocking member 380 may be ethylene propylene diene monomer (EPDM) or polyurethane rubber, but the embodiments of the present disclosure are not limited thereto. For example, the ethylene propylene diene monomer (EPDM) may be ethylene propylene diene monomer (EPDM), but the embodiments of the present disclosure are not limited thereto.

[0230] According to an embodiment of the present disclosure, the first sound-emitting device 300-1 can be connected (or coupled) to the first side 200a of the headrest portion 200 and can output a first sound. For example, the first sound-emitting device 300-1 can output a first sound generated by the vibration (or displacement or drive) of the vibration device 351 including a piezoelectric material, thereby outputting a clear first sound in the mid- and high-frequency bands. For example, the first sound-emitting device 300-1 according to an embodiment of the present disclosure can be configured to output a first sound in the frequency range of approximately 200 Hz to approximately 20 kHz.

[0231] Figure 12 The present invention is shown in FIG. Figures 6 to 8 An exploded perspective view of the second sound emitting device is shown. Figure 13 It is along Figure 12 A cross-sectional view taken along line IV-IV' is shown.

[0232] Reference Figure 8 、 Figure 12 and Figure 13 , the second sound emitting device 300 - 2 according to an embodiment of the present disclosure may include a housing 310 , a vibration device 351 , and a buffer member 370 .

[0233] The housing 310 may be located on the second side 200b of the headrest portion 200. The second sound emitting device 300-2 may be configured to be connected (or supported) or fixed (or coupled) to the second side 200b of the headrest portion 200. The housing 310 may include a quadrilateral shape or a quadrilateral shape with a curved portion, but the embodiments of the present disclosure are not limited thereto.

[0234] The housing 310 may include a bottom plate 311, a side wall frame 312, and a receiving portion 313. For example, the bottom plate 311, the side wall frame 312, and the receiving portion 313 may be the same as those described above. Figure 10 and Figure 11 The bottom plate 311 , the side wall frame 312 and the accommodating portion 313 of the described first sound emitting device 300 - 1 are the same or substantially the same, and therefore, the same reference numerals refer to the same elements and repeated description thereof is omitted.

[0235] The housing 310 according to an embodiment of the present disclosure may further include one or more connecting portions (or coupling portions) 315. The one or more connecting portions 315 may be connected or coupled to the above referenced Figure 8 and Figure 9 The one or more second connection members 215b of the headrest portion 200 are described. Therefore, the second sound emitting device 300-2 or the housing 310 can be tilted (or rotated) from the second side 200b of the headrest portion 200 at a predetermined second angle (θ2).

[0236] The vibration device 351 may be located between the housing 310 and the buffer member 370 and may be configured to output the second sound (or the left channel sound). The vibration device 351 may be accommodated in the accommodation portion 313 of the housing 310 or supported by the accommodation portion 313 of the housing 310 and output the second sound. For example, the vibration device 351 may be configured to be supported by the first support portion 314a of the housing 310. For example, the vibration device 351 may be configured to be supported by the first support portion 314a of the housing 310. Figure 10 and Figure 11 The described vibration device 351 is the same or substantially the same, and therefore, the same reference numerals refer to the same elements and repeated description thereof is omitted.

[0237] The second sound emitting device 300 - 2 according to an embodiment of the present disclosure may further include a cover 355 .

[0238] The cover 355 may be configured to absorb impact applied to the housing 310 and / or the vibration device 351. The cover 355 may be configured at the vibration device 351. For example, the cover 355 may be configured to cover the vibration device 351. For example, the cover 355 may be located between the housing 310 and the buffer member 370. For example, the cover 355 may be disposed or configured between the housing 310 and the buffer member 370 and cover the vibration device 351. For example, the cover 355 may be similar to the above referenced Figure 10 and Figure 11 The described cover 355 is the same or substantially the same, and therefore, the same reference numerals refer to the same elements and repeated description thereof is omitted.

[0239] The buffer member 370 may be configured to overlap (or correspond to) the vibration device 351. For example, the buffer member 370 may be located between the vibration device 351 and the sheath member 290. For example, the buffer member 370 may be located between the cover 355 and the sheath member 290. For example, the buffer member 370 may be a path through which the second sound generated (or output) by the vibration device 351 is output. For example, the buffer member 370 may overlap (or correspond to) the vibration device 351. Figure 10 and Figure 11 The described cushioning members 370 are the same or substantially the same, and thus, the same reference numerals refer to the same elements and repeated descriptions thereof are omitted.

[0240] The second sound emitting device 300 - 2 according to an embodiment of the present disclosure may further include a sound blocking member 380 .

[0241] The sound blocking member 380 may be configured to block the second sound output in the rear direction of the housing 310. For example, the sound blocking member 380 may be located between the housing 310 and the sheath member 290. For example, the sound blocking member 380 may be located between the rear surface 311r of the housing 310 and the sheath member 290. The sound blocking member 380 may be the same as that described above with reference to FIG. Figure 10 and Figure 11 The described sound blocking member 380 is the same or substantially the same, and therefore, the same reference numerals refer to the same elements and repeated description thereof is omitted.

[0242] The second sound-emitting device 300-2 according to an embodiment of the present disclosure can be connected (or coupled) to the second side 200b of the headrest portion 200 and can output a second sound. For example, the second sound-emitting device 300-2 can output a second sound generated by the vibration (or displacement or drive) of the vibration device 351 including a piezoelectric material, thereby outputting a clear second sound in the mid- and high-frequency range. For example, the second sound-emitting device 300-2 according to an embodiment of the present disclosure can be configured to output a second sound in the frequency range of approximately 200 Hz to approximately 20 kHz.

[0243] Figure 14 is a rear view illustrating a headrest according to another embodiment of the present disclosure. Figure 15 is a perspective view illustrating a headrest according to another embodiment of the present disclosure. Figure 16 It is along Figure 14 A cross-sectional view taken along line V-V' is shown. Figures 14 to 16 The third sound emitting device is shown additionally configured above with reference to Figures 6 to 13 Therefore, in the following description, the third sound generating device and related elements will be described in detail, and other elements can be described with reference to the above. Figures 6 to 13The descriptions described above are the same or substantially the same, and therefore, the same reference numerals refer to the same elements, and repeated descriptions thereof will be omitted or briefly given below. Figures 6 to 13 A description of Figures 14 to 16 's description.

[0244] Reference Figures 14 to 16 The headrest 20 according to another embodiment of the present disclosure may further include a third sound emitting device 250 on the headrest portion 200 .

[0245] The headrest portion 200 according to another embodiment of the present disclosure may include a headrest frame 210 , a third sound emitting device 250 , and a buffer member 230 .

[0246] The headrest frame 210 may include a receiving portion 213. The receiving portion 213 may be configured to receive the third sound emitting device 250.

[0247] The headrest frame 210 may include a base frame 211 , a sidewall frame 212 , and a receiving portion 213 .

[0248] The base frame 211 may include a quadrangular shape or a quadrangular shape with a curved portion, but the embodiments of the present disclosure are not limited thereto. The base frame 211 may include a first surface (or front surface) and a second surface (or rear surface) 211r.

[0249] The sidewall frame 212 may be formed or arranged along the edge portion of the base frame 211. The sidewall frame 212 may protrude from the edge portion of the first surface of the base frame 211. For example, the sidewall frame 212 may be connected or perpendicularly connected to the edge portion of the first surface of the base frame 211.

[0250] The accommodating portion 213 may be formed or configured in the base frame 211. For example, the accommodating portion 213 may be formed or configured in the base frame 211 and accommodate or support the third sound emitting device 250. For example, the accommodating portion 213 may be formed or configured in the base frame 111 by a sidewall frame 212 protruding from a first surface of the base frame 211. For example, the accommodating portion 213 may be a accommodating space, a groove, an accommodating slot, or a supporting slot, but embodiments of the present disclosure are not limited thereto.

[0251] The headrest portion 200 according to the embodiment of the present disclosure may further include one or more first connection members 215 a and one or more second connection members 215 b .

[0252] One or more first connecting members 215a may protrude from the first side 200a of the headrest frame 210 to have a predetermined length. One or more first connecting members 215a may be configured to tilt (or rotate) from the first side 200a of the headrest frame 210 at a predetermined first angle (θ1). One or more first connecting members 215a may be connected to a surface of the first sound emitting device 300-1. For example, the end of one or more first connecting members 215a may be accommodated in Figure 10 and Figure 11 In one or more connecting parts 315 in the housing 310 of the first sound emitting device 300 - 1 shown.

[0253] One or more second connecting members 215b may protrude from the second side 200b of the headrest frame 210 to have a predetermined length. One or more second connecting members 215b may be configured to tilt (or rotate) from the second side 200b of the headrest frame 210 at a predetermined second angle (θ2). One or more second connecting members 215b may be connected to a surface of the second sound emitting device 300-2. For example, the end of one or more second connecting members 215b may be accommodated in Figure 13 In one or more connecting parts 315 in the housing 310 of the second sound emitting device 300 - 2 shown.

[0254] The headrest portion 200 according to the embodiment of the present disclosure may further include a first sound emission port 200o1 and a second sound emission port 200o2 .

[0255] The first sound emission port (or first sound outlet) 20001 may be configured in the lower portion of the headrest frame 210, or may be connected to the receiving portion 213. For example, the first sound emission port 200o1 may be configured (or formed) in a portion of the side wall frame 212 of the headrest frame 210 corresponding to the lower portion of the headrest frame 210. For example, the first sound emission port 200o1 may be configured (or formed) to pass through a portion of the side wall frame 212 and may be connected to the receiving portion 213. For example, the first sound emission port 200o1 may be provided (or configured) in the lower surface of the headrest portion 200 and may face the ground.

[0256] The second sound outlet (or second sound hole) 200o2 can be arranged in parallel with the first sound outlet 200o1 in the lower portion of the headrest frame 210 and can be connected to the receiving portion 213. For example, the second sound outlet 200o2 can be arranged (or formed) in a portion of the side wall frame 212 and adjacent to the first side 200a in the side wall frame 212 of the headrest frame 210. For example, the second sound outlet 200o2 can be arranged (or formed) to pass through a portion of the side wall frame 212 and can be connected to the receiving portion 213. For example, the second sound outlet 200o2 can be provided (or arranged) in the lower surface of the headrest portion 200 and can face the ground.

[0257] The third sound-emitting device 250 may be disposed (or arranged) in the headrest frame 210 and output a third sound. The third sound-emitting device 250 may be accommodated (or received) in the accommodation portion 213 of the headrest frame 210 and may be configured to output a third sound. For example, the third sound outputted by the third sound-emitting device 250 may be different from the first sound outputted by the first sound-emitting device 300-1 and the second sound outputted by the second sound-emitting device 300-2. For example, the third sound outputted by the third sound-emitting device 250 may include a bass frequency band.

[0258] According to an embodiment of the present disclosure, the third sound-emitting device 250 may be a woofer, but the embodiments of the present disclosure are not limited to this. For example, the third sound-emitting device 250 may be one or more of a woofer, a mid-woofer, and a subwoofer, but the embodiments of the present disclosure are not limited to this. For example, the third sound-emitting device 250 may be a speaker that outputs a third sound in the frequency range of 30 Hz to 200 Hz or below 300 Hz, but the embodiments of the present disclosure are not limited to this. Therefore, the third sound-emitting device 250 can output a third sound in the frequency range of 30 Hz to 200 Hz or below 300 Hz, thereby enhancing the sound characteristics of the bass frequency band of the sound output from the headrest 20.

[0259] The third sound-generating device 250 according to an embodiment of the present disclosure may be a coil-type vibration device or a coil-type actuator. For example, according to Fleming's left-hand rule, the third sound-generating device 250 may vibrate (or be driven) based on a drive signal (or a vibration drive signal or a voice signal) and output (or generate) a third sound (or sound wave or bass).

[0260] The third sound emitting device 250 according to an embodiment of the present disclosure may include a first housing 251 , a second housing 253 , an actuator 255 , and a cover plate 257 .

[0261] The first housing 251 may be disposed at the second housing 253 and the actuator 255. The first housing 251 may be configured to support the second housing 253 and the actuator 255. The first housing 251 may be configured to include a sound space 250s and a sound emission path 250p. The sound emission path 250p may be configured to connect (or communicate) with the second sound emission port 200o2 in the headrest frame 210.

[0262] The first housing 251 according to an embodiment of the present disclosure may include a bottom plate (or first bottom plate) 251a, a side wall (or first side wall) 251b, a sound space 250s, an opening portion (or first opening portion) 251o, a partition plate 251f, and a sound emission path 250p.

[0263] The bottom plate 251 a may be configured to have a shape and size corresponding to the receiving portion 213 of the headrest frame 210 A rear surface of the bottom plate 251 a may be supported by a bottom surface of the receiving portion 213 of the headrest frame 210 .

[0264] The sidewall 251b may be formed or configured along the edge of the bottom plate 251a. The sidewall 251b may protrude from the edge of the front surface of the bottom plate 251a. For example, the sidewall 251b may be connected to or perpendicularly connected to the edge of the front surface of the bottom plate 251a. For example, the sidewall 251b may form (or constitute) a sound space 250s on the front surface of the bottom plate 251a. For example, the sound space 250s may be surrounded by the sidewall 251b.

[0265] The sidewall 251b according to an embodiment of the present disclosure may include first to fourth sidewalls corresponding to the edge portions of the bottom plate 251a. For example, the sidewall 251b may include a first sidewall parallel to the first long side of the bottom plate 251a, a second sidewall parallel to the second long side of the bottom plate 251a, a third sidewall parallel to the first short side of the bottom plate 251a, and a fourth sidewall parallel to the second short side of the bottom plate 251b.

[0266] The opening 251o may be formed (or configured) in a portion of the side wall 251b and connected to (or communicated with) the second sound emission port 200o2 in the headrest frame 210. For example, the opening 251o may be formed (or configured) in a portion of the first side wall of the side wall 251b that corresponds to (or overlaps with) the second sound emission port 200o2 in the headrest frame 210. Thus, the second sound emission port 200o2 may be connected to (communicated with) the sound space 250s of the first housing 251 through the first opening 251o.

[0267] The partition plate 251f may be provided in a portion of the first sound space 250s. For example, the partition plate 251f may be provided in a portion of the first sound space 250s and may form (or constitute) a second sound path 250p that is separate from the first sound space 250s. For example, the partition plate 251f may include: a first partition plate connected to the first side wall of the side wall 251b adjacent to the opening 251o and spaced apart from the third side wall of the side wall 251b; a second partition plate spaced apart from a portion of the first side wall of the side wall 251b; and a third partition plate having a curved shape between the first and second partition plates, but embodiments of the present disclosure are not limited thereto. For example, the partition plate 251f may be provided in a portion of the first sound space 250s spaced apart from the side wall 251b to have an "L" shape, but embodiments of the present disclosure are not limited thereto.

[0268] The second sound emission path 250p may be formed (or arranged) in the area between the side wall 251b and the partition plate 251f. For example, one side of the second sound emission path 250p may be connected to (or communicate with) the sound space 250s in the area adjacent to the fourth side wall of the side wall 251b. For example, the other side of the second sound emission path 250p may be the opening 251o or may be connected to (or communicate with) the opening 251o.

[0269] According to an embodiment of the present disclosure, the first housing 251 may include a support portion 251c. The support portion 251c may be configured to support the actuator 255. For example, the support portion 251c may be configured to support the rear surface of the actuator 255. For example, the support portion 251c may be configured to protrude from the bottom plate 251 and support the rear edge portion of the actuator 255. For example, the support portion 251c may include a circular shape, but the embodiments of the present disclosure are not limited thereto. For example, the support portion 251c may be a protruding support portion, a circular support portion, an actuator support portion, a rear support portion, or a support member, but the embodiments of the present disclosure are not limited thereto.

[0270] The first housing 251 or the support portion 251 c according to an embodiment of the present disclosure may further include a receiving hole (or a first receiving hole) 251 h .

[0271] The receiving hole 251h can accommodate a portion of the actuator 255. The receiving hole 251h can be formed (or configured) in the area surrounded by the support portion 251c. The receiving hole 251h can have a smaller size than the support portion 251c, but the embodiments of the present disclosure are not limited thereto. The support portion 251c can be formed (or configured) to pass through the bottom plate 251a. For example, at least a portion of the rear surface of the actuator 255 can be accommodated in the receiving hole 251h.

[0272] The first housing 251 according to an embodiment of the present disclosure may further include a plurality of supporting protrusions (or a plurality of first supporting protrusions) 251d.

[0273] Multiple support protrusions 251d may be located around the support portion 251c. For example, the support portion 251c may be located between the multiple support protrusions 251d. The multiple support protrusions 251d may protrude from the bottom plate 251a to a predetermined height. The multiple support protrusions 251d may face each other with the support portion 251c located therebetween.

[0274] The second housing 253 may be configured on the first housing 251. The second housing 253 may be configured to support the actuator 255 and cover the first housing 251. The second housing 253 may be configured in the sound space 250s and the sound emission path 250p. The second housing 253 may be configured to support the actuator 255 and cover the sound space 250s and the sound emission path 250p of the first housing 251. For example, the second housing 253 may be connected (or coupled) to the side wall frame 212 of the headrest frame 210 and cover the sound space 250s and the sound emission path 250p of the first housing 251. For example, the second housing 253 may be connected (or coupled) to the headrest frame 210 via a plurality of fastening members. The plurality of fastening members may be fastened to the side wall frame 212 of the headrest frame 210 via the second housing 253. For example, each of the plurality of fastening members may be a screw or a bolt, but embodiments of the present disclosure are not limited thereto.

[0275] The headrest frame 210 may further include a support surface 214. The support surface 214 may support the second shell 253. The support surface 214 may be formed (or configured) to be recessed from the upper surface of the side wall frame 212. The support surface 214 may be formed (or configured) to be recessed from the upper surface of the side wall frame 212 and support the edge portion of the second shell 253.

[0276] The second housing 253 according to an embodiment of the present disclosure may include a bottom plate (or second bottom plate) 253a, a side wall (or second side wall) 253b, a support portion (or second support portion) 253c, a receiving hole (or first receiving hole) 253h and an opening portion (second opening portion) 253o.

[0277] The plate 253a may be disposed on the first housing 251. The bottom plate 253a may be configured to support the actuator 255 and cover the first housing 251. The second housing 253 may be disposed in the sound space 250s and the sound emission path 250p of the first housing 251. The second housing 253 may be configured to support the actuator 255 and cover the sound space 250s and the sound emission path 250p of the first housing 251.

[0278] The sidewall 253b can be formed or configured along the edge of the bottom plate 253a. The sidewall 253b can protrude from the edge of the front surface of the bottom plate 253a. For example, the sidewall 253b can be connected or perpendicularly connected to the edge of the front surface of the bottom plate 253a. For example, the sidewall 253b can be formed (or configured) to be supported by the sidewall frame 212 and the partition plate 251f of the first housing 251.

[0279] The support portion 253c may protrude from the bottom plate 253a and support the actuator 255. The support portion 253c may be formed to be recessed from the front surface of the bottom plate 253a and accommodate the actuator 255.

[0280] The receiving hole 253h may be formed (or configured) in the support portion 253c. The receiving hole 253h may be formed (or configured) in the support portion 253c and receive the actuator 255. For example, the receiving hole 253h may pass through the support portion 253c and receive a portion of the actuator 255.

[0281] The opening 253o may be formed (or arranged) in one side of the support portion 253c and connected (communicated) with the first sound emission port 200o1 in the headrest frame 210. For example, the opening 253o may be formed (or arranged) in the support portion corresponding to (or overlapping with) the first sound emission port 200o1 in the headrest frame 210. Thus, the first sound emission port 200o1 may be connected (communicated) with the opening 253o.

[0282] The second housing 253 according to an embodiment of the present disclosure may further include a plurality of supporting protrusions (or a plurality of second supporting protrusions) 253f located at the periphery of the supporting portion 253c.

[0283] The plurality of support protrusions 253f may be configured to be connected (or coupled) to the plurality of support protrusions 251d located on the first housing 251. The plurality of support protrusions 253f may protrude from the rear surface of the bottom plate 253a in a manner corresponding to (overlapping) the plurality of support protrusions 251d of the first housing 251.

[0284] The actuator 255 may be housed in the second housing 253 and may be configured to output a third sound. For example, the actuator 255 may be supported by or housed in the support portion 253c of the second housing 253. For example, a portion of the actuator 255 may be housed in a housing hole 253h in the support portion 253c of the second housing 253.

[0285] The actuator 255 according to an embodiment of the present disclosure may be accommodated in the second housing 253 or supported by the support portion 253c of the second housing 253 via a plurality of fastening members. For example, the plurality of fastening members may be fastened to the plurality of support protrusions 251d of the first housing 251 via the edge portion of the actuator 255, the support portion 253c of the second housing 253, and the plurality of support protrusions 253d. For example, each of the plurality of fastening members may be a screw or a bolt, but the embodiments of the present disclosure are not limited thereto.

[0286] According to an embodiment of the present disclosure, the actuator 255 may include a magnet and a coil. For example, the actuator 255 may be one or more of a woofer, a mid-woofer, and a subwoofer, but the embodiments of the present disclosure are not limited thereto. For example, the actuator 255 may be a speaker that outputs frequencies between 30 Hz and 200 Hz or below 300 Hz, but the embodiments of the present disclosure are not limited thereto.

[0287] The cover plate 257 may be connected (or coupled) to the second housing 253. The cover plate 257 may be connected (or coupled) to the second housing 253 and cover the actuator 255. The cover plate 257 may be connected (or coupled) to the second housing 253 so as to be spaced apart from the actuator 255. The cover plate 257 may be connected (or coupled) to the second housing 253 and cover the actuator 255, with a spacing space 253s therebetween. For example, the cover plate 257 may be connected (or coupled) to the support portion 253c of the second housing 253 and cover the actuator 255. For example, the cover plate 257 may be connected (or coupled) to the support portion 253c of the second housing 253 and cover the actuator 255, with a spacing space 253s therebetween.

[0288] The cover plate 257 may be configured to have a shape and size corresponding to the support portion 253c of the second housing 253, but embodiments of the present disclosure are not limited thereto. For example, the cover plate 257 may be supported by or attached to a support surface 253e in the support portion 253c of the second housing 253. For example, the support surface 253e of the second housing 253 may be formed (or configured) to be recessed along the periphery of the support portion 253c, but embodiments of the present disclosure are not limited thereto.

[0289] The space 253s may be located between the cover plate 257 and the actuator 255 and may be connected to (or communicate with) the opening 253o. For example, a third sound generated by the driving (or vibration) of the actuator 255 may be output toward the lower surface of the headrest 20 through the space 253s, the opening 2530, and the first sound emission port 200o1.

[0290] In the third sound emitting device 250 according to the embodiment of the present disclosure, the sound space 250s and the sound emitting path 250p provided (or configured) by the first housing 251 and the second housing 253 may constitute a Helmholtz resonator.

[0291] According to an embodiment of the present disclosure, sound space 250s may be the volume of a Helmholtz resonator, but the embodiments of the present disclosure are not limited to this. Sound path 250p may be a sound guide tube or a sound duct, but the embodiments of the present disclosure are not limited to this. For example, sound path 250p may extend to opening 251o, and thus the total length of sound path 250p may be the length of the opening of the Helmholtz resonator, but the embodiments of the present disclosure are not limited to this. Furthermore, the cross-sectional area of opening 251o may be the aperture area of the Helmholtz resonator, but the embodiments of the present disclosure are not limited to this.

[0292] The sound emission path 250p according to an embodiment of the present disclosure can amplify the third sound generated by the third sound emission device 250 by utilizing the resonance of the pipe, thereby enhancing the frequency characteristics of the third sound in the low frequency band. For example, the third sound generated by the third sound emission device 250 can be amplified based on the vibration of the pipe of the sound emission path 250p and can be output toward the lower surface of the headrest 20 through the opening portion 251o and the second sound output hole 210o2.

[0293] The headrest portion 200 according to the embodiment of the present disclosure may further include a support rod portion 240 .

[0294] The support rod portion 240 according to an embodiment of the present disclosure can be connected (or coupled) to the headrest frame 210. The support rod portion 240 according to an embodiment of the present disclosure can be connected (or coupled) to the headrest frame 210 and cover the third sound emitting device 250. The support rod portion 240 can be configured to be connected (or coupled) to the lower surface of the headrest frame 210, or can be configured to support the lower surface of the headrest frame 210. For example, the support rod portion 240 can include one or more support rods 242.

[0295] One or more support rods 242 may be configured to be connected to the lower surface of the headrest frame 210. For example, the support rod portion 240 may include a pair of support rods 242, but the embodiments of the present disclosure are not limited thereto. For example, one or more (or a pair of) support rods 242 may be connected to the upper portion of the seatback of a vehicle seat or the backrest frame of a chair.

[0296] The support rod portion 240 according to another embodiment of the present disclosure may be configured to be connected (or coupled) to the rear surface of the headrest portion 200 or the headrest frame 210 , or may be configured to support the rear surface of the headrest portion 200 or the headrest frame 210 .

[0297] The support rod portion 240 according to another embodiment of the present disclosure may include a support frame 241 and one or more support rods 242 .

[0298] The support frame 241 may be configured to be connected (or coupled) to the rear surface of the headrest frame 210 , or may be configured to support the rear surface of the headrest frame 210 and cover the third sound emitting device 250 .

[0299] One or more support rods 242 may be configured to be connected to the lower surface and rear surface of the support frame 241. For example, the support rod portion 240 may include a pair of support rods 242, but embodiments of the present disclosure are not limited thereto. For example, one or more (or a pair of) support rods 242 may be connected to the upper portion of the seatback of a vehicle seat or the backrest frame of a chair.

[0300] The support rod portion 240 according to another embodiment of the present disclosure may further include a first support plate 243 and a second support plate 244 .

[0301] The first support plate 243 may be connected (or coupled) to the lower surface of the support frame 241 by a plurality of second fastening members. The second support plate 244 may be connected (or coupled) to the rear surface of the support frame 241. For example, the second support plate 244 may be connected (or coupled) to one side of the first support plate 243 and may be connected (or coupled) to the rear surface of the support frame 241. For example, the first support plate 243 and the second support plate 244 may be connected (or coupled) to the rear surface of the support frame 241 with reference to FIG. Figure 9 The first support plate 243 and the second support plate 244 of the support rod portion 240 are described as being identical or substantially identical, and therefore, repeated description thereof is omitted.

[0302] The cushioning member 230 may be located on the front surface 211f of the headrest frame 210. For example, the cushioning member 230 may be configured to cover the front surface 211f of the headrest frame 210. For example, the cushioning member 230 may include a material that absorbs shock. For example, the cushioning member 230 may be similar to the one described above. Figure 9 The described buffer members 230 are the same or substantially the same, and thus, repeated description thereof is omitted.

[0303] The headrest 20 according to another embodiment of the present disclosure may further include a third sound emitting device 250, and thus, may additionally output a third sound generated by the vibration (or driving) of the third sound emitting device 250. For example, the headrest 20 according to another embodiment of the present disclosure may output three-channel stereo sound including a first sound (or right channel sound) generated by the first sound emitting device 300-1, a second sound (or left channel sound) generated by the second sound emitting device 300-2, and a third sound generated by the third sound emitting device 250. For example, the headrest 20 according to another embodiment of the present disclosure may output first and second sounds in the mid- and high-frequency ranges through the first and second sound emitting devices 300-1 and 300-2, respectively, and may output a third sound in the low-frequency range through the third sound emitting device 250, thereby reproducing (or outputting) sound across the entire frequency range.

[0304] Figure 17 is a perspective view illustrating a vibration element according to an embodiment of the present disclosure. Figure 18 It is along Figure 17 A cross-sectional view taken along line VI-VI' is shown. Figure 19 It is along Figure 17 The cross-sectional view taken along line VII-VII' is shown. For example, Figures 17 to 19 Shown above reference Figures 1 to 13 A vibrating element of a vibrating device is described.

[0305] Reference Figures 17 to 19 , the vibration elements 151 b and 351 b according to an embodiment of the present disclosure may include a piezoelectric material having piezoelectric characteristics.

[0306] The vibration elements 151 b and 351 b may be configured as a ceramic-based piezoelectric material for achieving relatively strong vibration, or may be configured as piezoelectric ceramics having a perovskite-based crystal structure.

[0307] The vibration elements 151 b and 351 b according to an embodiment of the present disclosure may include a vibration part 411 .

[0308] The vibration unit 411 can be configured to vibrate via the piezoelectric effect based on a piezoelectric drive signal. The vibration unit 411 can include at least one of an inorganic piezoelectric material and an organic piezoelectric material. For example, the vibration unit 411 can be a vibration element, a piezoelectric element layer, a piezoelectric structure, a piezoelectric vibration unit, or a piezoelectric vibration layer, but the embodiments of the present disclosure are not limited thereto.

[0309] The vibration part 411 according to an embodiment of the present disclosure may include a vibration layer 411 a , a first electrode layer 411 b , and a second electrode layer 411 c .

[0310] The vibration layer 411a may include a piezoelectric material or an electroactive material having a piezoelectric effect. For example, a piezoelectric material may have the following characteristics: when pressure or distortion is applied to the crystal structure by an external force, a potential difference is generated due to dielectric polarization caused by the change in the relative positions of positive (+) ions and negative (-) ions, and vibration is generated based on the electric field of the reverse voltage applied thereto. For example, the vibration layer 411a may be a piezoelectric layer, a piezoelectric material layer, an electroactive layer, a piezoelectric composite material layer, a piezoelectric composite material, or a piezoelectric ceramic composite material, but the embodiments of the present disclosure are not limited thereto.

[0311] The vibration layer 411a may be configured as a ceramic-based material for achieving relatively strong vibration, or may be configured as a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite crystal structure may have a piezoelectric effect and / or an inverse piezoelectric effect and may be an oriented plate-like structure.

[0312] The piezoelectric ceramic may be configured as a single crystal ceramic having a single crystal structure, or may be configured as a ceramic material or a polycrystalline ceramic having a polycrystalline structure. The piezoelectric material comprising a single crystal ceramic may include α-AlPO4, α-SiO2, LiNbO3, Tb2(MoO4)3, Li2B4O7, or ZnO, but the embodiments of the present disclosure are not limited thereto. The piezoelectric material comprising a polycrystalline ceramic may include a lead zirconate titanate (PZT)-based material comprising lead (Pb), zirconium (Zr), and titanium (Ti), or may include a lead zirconate nickel niobate (PZNN)-based material comprising lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but the embodiments of the present disclosure are not limited thereto. For example, the vibration layer 411 a may include at least one of calcium titanate (CaTiO 3 ) containing no lead (Pb), barium titanate (BaTiO 3 ), and strontium titanate (SrTiO 3 ), but the embodiments of the present disclosure are not limited thereto.

[0313] The first electrode layer 411b may be provided on a first surface (or upper surface or front surface) 411s1 of the vibration layer 411a. The first electrode layer 411b may have the same size as the vibration layer 411a, or may have a smaller size than the vibration layer 411a.

[0314] The second electrode layer 411c may be provided on a second surface (or lower surface or rear surface) 411s2 opposite or different from the first surface 411s1 of the vibration layer 411a. The second electrode layer 411c may have the same size as the vibration layer 411a, or may have a smaller size than the vibration layer 411a. For example, the second electrode layer 411c may have the same shape as the vibration layer 411a, but embodiments of the present disclosure are not limited thereto.

[0315] According to an embodiment of the present disclosure, one or more of the first electrode layer 411b and the second electrode layer 411c may be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent conductive material or the semi-transparent conductive material may include indium tin oxide (ITO) or indium zinc oxide (IZO), but the embodiments of the present disclosure are not limited thereto. The opaque conductive material may include gold (Au), silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), carbon, or silver (Ag) containing glass frit, or may be formed of an alloy thereof, but the embodiments of the present disclosure are not limited thereto. For example, to enhance the electrical and / or vibration characteristics of the vibration layer 411a, each of the first electrode layer 411b and the second electrode layer 411c may include silver (Ag) having a low resistivity. For example, the carbon may be carbon black, Ketjen black, carbon nanotubes, and a carbon material including graphite, but the embodiments of the present disclosure are not limited thereto.

[0316] The vibration layer 411a can be polarized by applying a certain voltage to the first electrode layer 411b and the second electrode layer 411c in a certain temperature environment or in a temperature environment that can change from high temperature to room temperature, but the embodiments of the present disclosure are not limited thereto. For example, the polarization direction of the vibration layer 411a can be formed or aligned (or arranged) from the first electrode layer 411b to the second electrode layer 411c, but is not limited thereto, and the polarization direction of the vibration layer 411a can be formed or aligned (or arranged) from the second electrode layer 411c to the first electrode layer 411b.

[0317] The vibration layer 411a can vibrate by alternately and repeatedly contracting and / or expanding based on the inverse piezoelectric effect according to a piezoelectric drive signal applied from the outside to the first electrode layer 411b and the second electrode layer 411c. For example, the vibration layer 411a can vibrate in the vertical direction (or thickness direction) and the planar direction by the signal applied to the first electrode layer 411b and the second electrode layer 411c. The vibration layer 411a can be displaced (or vibrated or driven) by contraction and / or expansion in the planar direction, thereby improving the sound characteristics and / or sound pressure level characteristics of the vibration elements 151b and 351b.

[0318] The vibration elements 151 b and 351 b according to an embodiment of the present disclosure may further include a cover member 413 .

[0319] The cover member 413 may be configured to cover at least one of the first surface and the second surface of the vibration part 411. The cover member 413 may be configured to protect at least one of the first surface and the second surface of the vibration part 411. For example, the first surface of the vibration part 411 may be the front surface or the upper surface. For example, the second surface of the vibration part 411 may be the rear surface or the lower surface opposite to the first surface.

[0320] The cover member 413 according to an embodiment of the present disclosure may include a first cover member 413 a .

[0321] The first cover member 413a may be provided on the first surface of the vibration portion 411. For example, the first cover member 413a may be configured to cover the first electrode layer 411b of the vibration portion 411. For example, the first cover member 413a may be configured to have a larger size than the vibration portion 411, but embodiments of the present disclosure are not limited thereto. The first cover member 413a may be configured to protect the first surface of the vibration portion 411 and the first electrode layer 411b.

[0322] The first cover member 413a according to an embodiment of the present disclosure may include an adhesive layer. For example, the first cover member 413a may include a base film and an adhesive layer in the base film and connected or bonded to the first surface of the vibration part 411. For example, the adhesive layer may include an electrically insulating material having adhesive properties and capable of compression and decompression, but the embodiments of the present disclosure are not limited thereto.

[0323] According to another embodiment of the present disclosure, the first cover member 413a can be connected or bonded to the first surface of the vibration portion 411 via a first adhesive layer 413b. For example, the first cover member 413a can be connected or bonded to the first surface of the vibration portion 411 or the first electrode layer 411b via the first adhesive layer 413b. For example, the first cover member 413a can be connected or bonded to the first surface of the vibration portion 411 or the first electrode layer 411b via the first adhesive layer 413b via a film lamination process. The first adhesive layer 413b can be configured to surround the entire first surface or a portion of a side surface of the vibration portion 411.

[0324] The cover member 413 according to an embodiment of the present disclosure may include a second adhesive layer 413 c .

[0325] The second adhesive layer 413c may be provided on the second surface of the vibration portion 411. For example, the second adhesive layer 413c may be configured to cover the second electrode layer 411c of the vibration portion 411. The second adhesive layer 413c may be configured to protect the second surface and the second electrode layer 411c of the vibration portion 411. The second adhesive layer 413c may be configured to surround the entire second surface or a portion of a side surface of the vibration portion 411. For example, the second adhesive layer 413c may be a protective layer or a protective member, but embodiments of the present disclosure are not limited thereto.

[0326] The second adhesive layer 413c can be connected or bonded to the first adhesive layer 413b in the side of the vibration part 411 or the outer periphery of the first cover member 413a. Therefore, the first adhesive layer 413b and the second adhesive layer 413c can be configured to surround or completely surround the vibration part 411. The first adhesive layer 413b and the second adhesive layer 413c can be configured to cover or surround all surfaces of the vibration part 411. For example, the vibration part 411 can be inserted (or accommodated) or embedded (or built-in) inside the adhesive layer including the first adhesive layer 413b and the second adhesive layer 413c.

[0327] The cover member 413 according to an embodiment of the present disclosure may further include a second cover member 413d, but the embodiment of the present disclosure is not limited thereto. The second cover member 413d may be provided on the second surface of the vibration portion 411. For example, the second cover member 413d may be configured to cover the second electrode layer 411c of the vibration portion 411. For example, the second cover member 413d may be configured to have a larger size than the vibration portion 411 and may be configured to have the same size as the first cover member 413a, but the embodiment of the present disclosure is not limited thereto. The second cover member 413d may be configured to protect the second surface of the vibration portion 411 and the second electrode layer 411c.

[0328] According to an embodiment of the present disclosure, the first cover member 413a and the second cover member 413d may include the same material or different materials. For example, each of the first cover member 413a and the second cover member 413d may be a polyimide film, a polyethylene naphthalate film, or a polyethylene terephthalate film, but the embodiment of the present disclosure is not limited thereto.

[0329] The second cover member 413d may be connected or bonded to the second surface of the vibration part 411 or the second electrode layer 411c by using the second adhesive layer 413c. For example, the second cover member 413d may be connected or bonded to the second surface of the vibration part 411 or the second electrode layer 411c by the second adhesive layer 413c through a film lamination process.

[0330] The vibration part 411 may be disposed or inserted (or accommodated) between the first cover member 413a and the second cover member 413d. For example, the vibration part 411 may be inserted (or accommodated) or embedded (or built-in) inside the adhesive layer including the first adhesive layer 413b and the second adhesive layer 413c, but the embodiments of the present disclosure are not limited thereto.

[0331] Each of the first adhesive layer 413b and the second adhesive layer 413c according to an embodiment of the present disclosure may include an electrically insulating material having adhesive properties and capable of compression and decompression. For example, each of the first adhesive layer 413b and the second adhesive layer 413c may include epoxy resin, acrylic resin, silicone resin, polyurethane resin, pressure sensitive adhesive (PSA), optically clear adhesive (OCA) or optically clear resin (OCR), but the embodiments of the present disclosure are not limited thereto.

[0332] The first adhesive layer 413b and the second adhesive layer 413c may be disposed between the first cover member 413a and the second cover member 413d to surround the vibration portion 411. For example, one or more of the first adhesive layer 413b and the second adhesive layer 413c may be disposed to surround the vibration portion 411.

[0333] The vibration elements 151 b and 351 b according to an embodiment of the present disclosure may further include a signal supply member 417 .

[0334] The signal supply member 417 may be configured to supply a driving signal supplied from the driving circuit portion to the vibration portion 411. The signal supply member 417 may be configured to be electrically connected to the vibration portion 411. The signal supply member 417 may be configured to be electrically connected to the first electrode layer 411b and the second electrode layer 411c of the vibration portion 411.

[0335] A portion of the signal supply member 417 may be accommodated (or inserted) between the cover member 413 and the vibration part 411. For example, a portion of the signal supply member 417 may be accommodated (or inserted) between the first surface of the vibration part 411 and the first cover member 413a. For example, a portion of the signal supply member 417 may be accommodated (or inserted) between the first cover member 413a and the second cover member 413d, but embodiments of the present disclosure are not limited thereto.

[0336] According to an embodiment of the present disclosure, an end portion (or distal end portion or one side) of the signal supply member 417 may be disposed or inserted (or accommodated) between one peripheral portion of the cover member 413 and the vibration portion 411. For example, an end portion of the signal supply member 417 may be disposed or inserted (or accommodated) between one peripheral portion of the first cover member 413a and the first surface of the vibration portion 411. For example, the signal supply member 417 may be configured as a signal cable, a flexible cable, a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multi-layer printed circuit, or a flexible multi-layer printed circuit board, but the embodiments of the present disclosure are not limited thereto.

[0337] The signal supply member 417 according to an embodiment of the present disclosure may include a base member 417a and a plurality of signal lines 417b and 417c. For example, the signal supply member 417 may include a base member 417a, a first signal line 417b, and a second signal line 417c.

[0338] The base member 417 a may include a transparent or opaque plastic material, but embodiments of the present disclosure are not limited thereto.

[0339] The first signal line 417b and the second signal line 417c can be provided on the first surface of the base member 417a and can be spaced apart from each other or electrically isolated from each other. The first signal line 417b and the second signal line 417c can be provided parallel to each other on the first surface of the base member 417a. For example, the first signal line 417b and the second signal line 417c can be implemented as a line by patterning or depositing a metal layer (or conductive layer) on the first surface of the base member 417a.

[0340] Ends (or distal ends or one side) of the first signal line 417 b and the second signal line 417 c may be separated from each other and, thus, may be individually bent or curved.

[0341] The end of the first signal line 417b can be electrically connected to the first electrode layer 411b of the vibration portion 411. For example, the end of the first signal line 417b can be electrically connected to at least a portion of the first electrode layer 411b of the vibration portion 411 in one peripheral portion of the first cover member 413a. For example, the end of the first signal line 417b can be electrically connected to or directly connected to at least a portion of the first electrode layer 411b of the vibration portion 411. For example, the end of the first signal line 417b can be electrically connected to or directly contact the first electrode layer 411b of the vibration portion 411. For example, the end of the first signal line 417b can be electrically connected to the first electrode layer 411b via a conductive double-sided tape. Therefore, the first signal line 417b can be configured to supply the first drive signal supplied from the drive circuit portion to the first electrode layer 411b of the vibration portion 411.

[0342] The end of the second signal line 417c can be electrically connected to the second electrode layer 411c of the vibration portion 411. For example, the end of the second signal line 417c can be electrically connected to at least a portion of the second electrode layer 411c of the vibration portion 411 in one peripheral portion of the second cover member 413d. For example, the end of the second signal line 417c can be electrically connected to or directly connected to at least a portion of the second electrode layer 411c of the vibration portion 411. For example, the end of the second signal line 417c can be electrically connected to or directly contact the second electrode layer 411c of the vibration portion 411. For example, the end of the second signal line 417c can be electrically connected to the second electrode layer 411c using a conductive double-sided tape. Thus, the second signal line 417c can be configured to supply the second drive signal supplied from the drive circuit portion to the second electrode layer 411c of the vibration portion 411.

[0343] The signal supply member 417 according to an embodiment of the present disclosure may further include an insulating layer 417 d .

[0344] The insulating layer 417 d may be disposed on the first surface of the base member 417 a and cover each of the first signal line 417 b and the second signal line 417 c except for an end portion (or one side) of the signal supply member 417 .

[0345] According to an embodiment of the present disclosure, the signal supply member 417 including an end portion (or one side) of the base member 417a and an end portion (or one side) of the insulating layer 417d can be inserted (or accommodated) between the cover member 413 and the vibration portion 411 and can be fixed between the cover member 413 (or the first cover member 413a) and the vibration portion 411 by the first adhesive layer 413b and the second adhesive layer 413c.

[0346] According to another embodiment of the present disclosure, the end (or one side) of the signal supply member 417, including the end of the base member 417a and the end of the insulating layer 417d, can be inserted (or accommodated) between the first cover member 413a and the second cover member 413d and can be fixed between the first cover member 413a and the second cover member 413b by the first adhesive layer 413b and the second adhesive layer 413c. Therefore, the end of the first signal line 417b can be maintained to be electrically connected to the first electrode layer 411b of the vibration part 411, and the end of the second signal line 417c can be maintained to be electrically connected to the second electrode layer 411c of the vibration part 411. In addition, the end of the signal supply member 417 can be inserted (or accommodated) and fixed between the vibration part 411 and the first cover member 413a, thereby preventing contact defects between the vibration elements 151b and 351b and the signal supply member 417 caused by movement of the signal supply member 417.

[0347] In the signal supply member 417 according to an embodiment of the present disclosure, each of the end portion of the base member 417a and the end portion 417da of the insulating layer 417d can be removed. For example, each of the end portion of the first signal line 417b and the end portion of the second signal line 417c can be exposed to the outside without being supported or covered by each of the end portion of the base member 417a and the end portion 417da of the insulating layer 417d. For example, the end portion of each of the first signal line 417b and the second signal line 417c can protrude (or extend) from the end portion of the base member 417a or the end portion of the insulating layer 417d to have a certain length. Therefore, the end portion of each of the first signal line 417b and the second signal line 417c can be bent individually or independently.

[0348] An end portion of the first signal line 417b that is not supported by an end portion of the base member 417a and an end portion of the insulating layer 417d may be directly connected to or in direct contact with the first electrode layer 411b of the vibration portion 411. An end portion of the second signal line 417c that is not supported by an end portion of the base member 417a and an end portion of the insulating layer 417d may be directly connected to or in direct contact with the second electrode layer 411c of the vibration portion 411.

[0349] According to an embodiment of the present disclosure, a portion of the signal supply member 417 or a portion of the base member 417a can be disposed or inserted (or accommodated) between the cover member 413 and the vibration portion 411, and thus, the signal supply member 417 can be formed as one piece with the vibration portion 411. In addition, a portion of the signal supply member 417 or a portion of the base member 417a can be disposed or inserted (or accommodated) between the first cover member 413a and the second cover member 413d, and thus, the signal supply member 417 can be formed as one piece with the vibration elements 151b and 351b. Therefore, the vibration elements 151b and 351b and the signal supply member 417 can be configured as one part (or one element or one component), and thus, a uni-materialization effect can be obtained.

[0350] According to an embodiment of the present disclosure, the first signal line 417b and the second signal line 417c of the signal supply member 417 may be formed as one body with the vibration elements 151b and 351b, and thus, there is no need for a welding process for electrical connection between the vibration elements 151b and 351b and the signal supply member 417. Therefore, the manufacturing process and structure of the vibration elements 151b and 351b may be simplified, and risks associated with the welding process may be reduced.

[0351] Figure 20 is a perspective view showing a vibration layer according to another embodiment of the present disclosure. For example, Figure 20 Shown above reference Figures 17 to 19Another embodiment of a vibration layer is described.

[0352] Reference Figure 18 and Figure 20 According to another embodiment of the present disclosure, the vibration layer 411a may include a plurality of first portions 411a1 and a plurality of second portions 411a2. For example, the plurality of first portions 411a1 and the plurality of second portions 411a2 may be alternately and repeatedly arranged along the first direction x (or the second direction Y).

[0353] Each of the plurality of first portions 411a1 may include an inorganic material portion having a piezoelectric effect (or piezoelectric characteristics). For example, each of the plurality of first portions 411a1 may include at least one of an inorganic piezoelectric material and an organic piezoelectric material. For example, each of the plurality of first portions 411a1 may be an inorganic portion, an inorganic material portion, a piezoelectric portion, a piezoelectric material portion, or an electroactive portion, but embodiments of the present disclosure are not limited thereto.

[0354] According to an embodiment of the present disclosure, each of the plurality of first portions 411a1 may have a first width W1 parallel to the first direction X (or the second direction Y) and may extend along the second direction Y (or the first direction X). Figures 17 to 19 The vibration layer 411 a described is substantially the same, and therefore, repeated description thereof is omitted.

[0355] Each of the plurality of second portions 411a2 may be disposed between the plurality of first portions 411a1. For example, each of the plurality of first portions 411a1 may be disposed between two adjacent second portions 411a2 in the plurality of second portions 411a2. Each of the plurality of second portions 411a2 may have a second width W2 parallel to the first direction X (or second direction Y) and may extend along the second direction Y (or first direction X). The first width W1 may be the same as or different from the second width W2. For example, the first width W1 may be greater than the second width W2. For example, the first portion 411a1 and the second portion 411a2 may include linear shapes or stripe shapes having the same size or different sizes, but embodiments of the present disclosure are not limited thereto.

[0356] Each of the plurality of second portions 411a2 can be configured to fill the gap between two adjacent first portions in the plurality of first portions 411a1. Each of the plurality of second portions 411a2 can be configured to fill the gap between two adjacent first portions in the plurality of first portions 411a1, and therefore, can be connected to or attached to the side of the first portion 411a1 adjacent thereto. According to an embodiment of the present disclosure, each of the plurality of first portions 411a1 and the plurality of second portions 411a2 can be arranged (or arranged) parallel to each other in the same plane (or the same layer). Therefore, the vibration layer 411a can be extended to a desired size or length by lateral bonding (or connection) of the first portion 411a1 and the second portion 411a2.

[0357] According to an embodiment of the present disclosure, each of the plurality of second portions 411a2 can absorb impact applied to the first portion 411a1, thereby enhancing the overall durability of the first portion 411a1 and providing flexibility to the vibration layer 411a. Each of the plurality of second portions 411a2 can include an organic material having ductile properties. For example, each of the plurality of second portions 411a2 can include one or more of an epoxy-based polymer, an acrylic-based polymer, and a siloxane-based polymer, but the embodiments of the present disclosure are not limited thereto. For example, each of the plurality of second portions 411a2 can be an organic portion, an organic material portion, an adhesive portion, a stretching portion, a bending portion, a damping portion, or an extension portion, but the embodiments of the present disclosure are not limited thereto.

[0358] The first surface of each of the plurality of first portions 411a1 and the plurality of second portions 411a2 may be commonly connected to the first electrode layer 411b, and the second surface of each of the plurality of first portions 411a1 and the plurality of second portions 411a2 may be commonly connected to the second electrode layer 411c.

[0359] The plurality of first portions 411a1 and the plurality of second portions 411a2 may be arranged (or connected) on the same plane, and thus, the vibration portion 411a according to another embodiment of the present disclosure may be a single film type. Therefore, the vibration layer 411 according to another embodiment of the present disclosure or the vibration elements 151b and 351b including the vibration layer 411a may vibrate by the first portions 411a1 having vibration characteristics and may be bent into a curved shape by the second portions 411a2 having flexibility.

[0360] Figure 21 is a perspective view showing a vibration layer according to another embodiment of the present disclosure. For example, Figure 21 Shown above reference Figures 17 to 19 Another embodiment of a vibration layer is described.

[0361] Reference Figure 18 and Figure 21 , the vibration layer 411 a according to another embodiment of the present disclosure may include a plurality of first portions 411 a 3 and a second portion 411 a 4 disposed between the plurality of first portions 411 a 3 .

[0362] Each of the plurality of first portions 411a3 may be arranged to be spaced apart from each other along each of the first direction X and the second direction Y. For example, each of the plurality of first portions 411a3 may be a hexahedron having the same size and may be arranged in a lattice shape, but the embodiments of the present disclosure are not limited thereto. For example, each of the plurality of first portions 411a3 may be a circular plate, an elliptical plate, or a polygonal plate having the same size as each other, but the embodiments of the present disclosure are not limited thereto.

[0363] Each of the plurality of first portions 411a3 may be the same as that referred to above. Figure 20 The first portion 411a1 of the description is substantially the same, and therefore, repeated description thereof is omitted.

[0364] The second portion 411a4 may be disposed between the plurality of first portions 411a3 along each of the first direction X and the second direction Y. The second portion 411a4 may be configured to fill a gap between two adjacent first portions 411a3, or to be adjacent to each of the plurality of first portions 411a3, or to surround each of the plurality of first portions 411a3, and thus, the second portion 411a4 may be connected to or attached to the first portion 411a3 adjacent thereto. The second portion 411a4 may be similar to the first portion 411a3 described above. Figure 20 The second portion 411a2 of the description is substantially the same, and therefore, repeated description thereof is omitted.

[0365] A first surface of each of the plurality of first portions 411a3 and second portions 411a4 may be commonly connected to the first electrode layer 411b, and a second surface of each of the plurality of first portions 411a3 and second portions 411a4 may be commonly connected to the second electrode layer 411c.

[0366] The plurality of first portions 411a3 and second portions 11a4 may be arranged (or connected) on the same plane. Thus, the vibration layer 411a according to another embodiment of the present disclosure may be a single film type, but the present disclosure is not limited thereto. Thus, the vibration portion 411 of the vibration elements 151b and 351b including the vibration layer 411a according to another embodiment of the present disclosure may vibrate through the first portion 411a3 having vibration characteristics and may be bent into a curved shape through the second portion 411a4 having flexibility.

[0367] Figure 22 : is a perspective view showing a vibration device according to another embodiment of the present disclosure. For example, Figure 22 Shown above reference Figures 1 to 13 A vibrating element of a vibrating device is described.

[0368] Reference Figure 22 According to another embodiment of the present disclosure, the vibration elements 151b and 351b may include two or more vibration generating parts 410-1 and 410-2. For example, the vibration elements 151b and 351b may include a first vibration generating part 410-1 and a second vibration generating part 410-2.

[0369] The first vibration generating part 410-1 and the second vibration generating part 410-2 can overlap or stack each other and shift (or drive or vibrate) in the same direction to maximize the amplitude displacement of the vibration device 10 or the amplitude displacement of the vibration component. For example, the first vibration generating part 410-1 and the second vibration generating part 410-2 can have substantially the same size, but the embodiments of the present disclosure are not limited thereto. For example, the first vibration generating part 410-1 and the second vibration generating part 410-2 can have substantially the same size within the error range of the manufacturing process. Therefore, the first vibration generating part 410-1 and the second vibration generating part 410-2 can maximize the amplitude displacement of the vibration elements 151b and 351b and / or the amplitude displacement of the vibration component.

[0370] Each of the first vibration generating part 410 - 1 and the second vibration generating part 410 - 2 may be the same as that described above. Figures 17 to 21 The described vibration elements 151b and 351b are the same or substantially the same, and therefore, the same reference numerals refer to the same elements and repeated descriptions thereof are omitted.

[0371] The vibration elements 151 b and 351 b according to another embodiment of the present disclosure may further include an intermediate member 410M.

[0372] The intermediate member 410M may be disposed or connected between the first vibration generating part 410-1 and the second vibration generating part 410-2. As an embodiment of the present disclosure, the intermediate member 410M may be disposed or connected between the second adhesive layer 413c of the first vibration generating part 410-1 and the first cover member 413a of the second vibration generating part 410-2. As another embodiment of the present disclosure, the intermediate member 410M may be disposed or connected between the second cover member 413d of the first vibration generating part 410-1 and the first cover member 413a of the second vibration generating part 410-2. For example, the intermediate member 410M may be an intermediate adhesive member, an adhesive member, or a connecting member, but embodiments of the present disclosure are not limited thereto.

[0373] According to an embodiment of the present disclosure, the intermediate member 410M can be made of a material including an adhesive layer having good adhesion or adhesion to each of the first vibration generating part 410-1 and the second vibration generating part 410-2, but the embodiments of the present disclosure are not limited thereto. For example, the intermediate member 410M may include a foam pad, double-sided tape, double-sided foam tape, double-sided foam pad, double-sided adhesive tape or adhesive, etc., but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the intermediate member 410M may include epoxy resin, acrylic resin, silicone resin or polyurethane, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the intermediate member 410M may include a polyurethane-based material (or substance) having relatively ductile properties. Therefore, the vibration loss caused by the displacement interference between the first vibration generating part 410-1 and the second vibration generating part 410-2 can be reduced or minimized, or each of the first vibration generating part 410-1 and the second vibration generating part 410-2 can be freely displaced (or vibrated or driven).

[0374] According to another embodiment of the present disclosure, the vibration elements 151b and 351b may include a first vibration generating portion 410-1 and a second vibration generating portion 410-2 stacked (or stacked or overlapped) to vibrate (or shift or drive) in the same direction, thereby maximizing or increasing the displacement or amplitude displacement. Therefore, the displacement (or bending force or driving force) or amplitude displacement of the vibration member may be further maximized or increased, thereby further enhancing the sound characteristics and / or sound pressure level characteristics of the bass frequency band.

[0375] Figure 23 is a perspective view illustrating a chair according to an embodiment of the present disclosure.

[0376] Reference Figure 23 , the chair 500 according to an embodiment of the present disclosure may be a study chair, an office chair, or a gaming chair, but the embodiments of the present disclosure are not limited thereto.

[0377] The chair 500 according to an embodiment of the present disclosure may include a seat portion 510 , a backrest portion 530 , and a headrest 550 .

[0378] The seat portion 510 may be configured to enable a user to sit down. The seat portion 510 may include a seat frame and a seat cushion supported by the seat frame.

[0379] The backrest portion 530 may be configured to be connected (or coupled) to one side of the seat portion 510. For example, the backrest portion 530 may include a backrest frame connected to one side of the seat portion 510 and a backrest cushion disposed on a front surface of the backrest frame. For example, the backrest portion 530 may be configured to rotate (or tilt) relative to one side of the seat portion 510.

[0380] The headrest 550 may be configured to be connected to the upper portion of the backrest portion 530 or supported by the upper portion of the backrest portion 530. The headrest 550 may be configured to output sound to the user sitting on the seat portion 510. The headrest 550 according to an embodiment of the present disclosure may be configured to include the above-mentioned Figures 1 to 13 as well as Figures 17 to 22 The headrest 10 described above is omitted for repetitive description. A headrest 550 according to another embodiment of the present disclosure may be configured to include the headrest 10 described above with reference to FIG. Figures 14 to 22 The headrest 20 is described above, and therefore, repeated description thereof is omitted.

[0381] The chair 500 according to the embodiment of the present disclosure may further include a seat support portion 530. The seat support portion 530 may include a vertical support portion 521 and a plurality of horizontal support portions 523.

[0382] The vertical support portion 521 may be vertically connected (or coupled) to the seat frame of the seat portion 510. For example, the vertical support portion 521 may be configured to adjust the height of the seat portion 510.

[0383] The plurality of horizontal support portions 523 may be supported by the ground and may be commonly connected (or coupled) to the vertical support portion 521. For example, the plurality of horizontal support portions 523 may be connected (or coupled) to the vertical support portion 521 to have a radial shape relative to the vertical support portion 521, thereby stably maintaining the vertical state of the vertical support portion 521.

[0384] The seat support portion 530 may further include a plurality of roller portions 525. The plurality of roller portions 525 may be connected (or coupled) to the plurality of horizontal support portions 523, respectively. The plurality of roller portions 525 may rotate based on the movement of the chair 500 in contact with the ground. Based on the rotation of the plurality of roller portions 525, the movement of the chair 500 may be facilitated.

[0385] The chair 500 according to an embodiment of the present disclosure may further include a pair of armrests 540 .

[0386] The pair of armrests 540 may be configured to support the arms of a user sitting on the seat portion 510. For example, the pair of armrests 540 may be provided (or configured) on one side (or left side) and the other side (or right side) of the seat portion 510.

[0387] The chair 500 according to an embodiment of the present disclosure can provide sound to a user sitting on the seat portion 510 through the headrest 550. For example, the chair 500 can provide two-channel stereo, three-channel stereo, or stereo including left and right channel sounds to the user sitting on the seat portion 510 through the headrest 550.

[0388] Figure 24is a perspective view showing a vehicle seat according to an embodiment of the present disclosure.

[0389] Reference Figure 24 The vehicle seat 600 according to an embodiment of the present disclosure may be a driver's seat, a passenger seat, a reclining seat, or a baby seat, but the embodiment of the present disclosure is not limited thereto.

[0390] The vehicle seat 600 according to an embodiment of the present disclosure may include a seat cushion 610 , a seat back 630 , and a headrest 650 .

[0391] The seat cushion 610 may be configured to enable a passenger in a vehicle to sit down. The seat cushion 610 may include a seat frame and a seat cushion supported by the seat frame.

[0392] The seat back 630 may be configured to be connected (or coupled) to one side of the seat cushion 610. For example, the seat back 630 may include a seat back frame connected (or coupled) to one side of the seat cushion 610 and a seat back pad disposed on the front surface of the seat back frame. For example, the seat back 630 may be configured to rotate (or tilt) relative to one side of the seat cushion 610.

[0393] The headrest 650 may be configured to be connected to or supported by the upper portion of the seat cushion 630. The headrest 650 may be configured to output sound to a passenger sitting on the seat cushion 630. The headrest 650 according to an embodiment of the present disclosure may be configured to include the above-mentioned Figures 1 to 13 as well as Figures 17 to 22 The headrest 10 described above is omitted for repetitive description. A headrest 650 according to another embodiment of the present disclosure may be configured to include the headrest 10 described above. Figures 14 to 22 The headrest 20 is described above, and therefore, repeated description thereof is omitted.

[0394] The vehicle seat 600 according to an embodiment of the present disclosure can provide sound to a passenger sitting on a seat cushion 610 through a headrest 650. For example, the vehicle seat 600 can provide two-channel stereo sound, three-channel stereo sound, or stereo sound including left-channel sound and right-channel sound to a passenger sitting on a seat cushion 610 through the headrest 650.

[0395] Figure 25 is a plan view showing a vehicle 700 according to an embodiment of the present disclosure.

[0396] The vehicle 700 according to an embodiment of the present disclosure may include a driver seat DS, a front passenger seat FPS, and a plurality of rear passenger seats RPS1 , RPS2 , and RPS3 .

[0397] The driver seat DS and the front passenger seat FPS may each be a front seat. Each of the driver seat DS and the front passenger seat FPS may include a headrest 750 .

[0398] The headrest 750 of each of the driver seat DS and the front passenger seat FPS according to an embodiment of the present disclosure may be configured to include the headrest 750 described above with reference to FIG. Figures 1 to 13 as well as Figures 17 to 22 The headrest 10 is described above, and therefore, repeated description thereof is omitted.

[0399] The headrest 750 of each of the driver seat DS and the front passenger seat FPS according to another embodiment of the present disclosure may be configured to include the headrest 750 described above with reference to FIG. Figures 14 to 22 The headrest 20 is described above, and therefore, repeated description thereof is omitted.

[0400] The headrest 750 of the driver's seat DS may provide the driver with two-channel stereo sound or three-channel stereo sound or stereo sound including left-channel sound and right-channel sound.

[0401] The headrest 750 of the front passenger seat FPS may provide a passenger sitting on the front passenger seat with two-channel stereo sound or three-channel stereo sound or stereo sound including left-channel sound and right-channel sound.

[0402] Each of the plurality of rear passenger seats RPS1 , RPS2 , and RPS3 may include a headrest 770 .

[0403] The headrest 770 of each of the plurality of rear passenger seats RPS1, RPS2, and RPS3 according to an embodiment of the present disclosure may be configured to include the headrest 770 described above with reference to FIG. Figures 1 to 13 as well as Figures 17 to 22 The headrest 10 is described above, and therefore, repeated description thereof is omitted.

[0404] The headrest 770 of each of the driver seat DS and the front passenger seat FPS according to another embodiment of the present disclosure may be configured to include the headrest 770 described above with reference to FIG. Figures 14 to 22 The headrest 20 is described above, and therefore, repeated description thereof is omitted.

[0405] The headrest 770 of each of the plurality of rear passenger seats RPS1 , RPS2 , and RPS3 may provide two-channel stereo or three-channel stereo or stereo including left-channel sound and right-channel sound to passengers sitting on each of the plurality of rear passenger seats.

[0406] According to another embodiment of the present disclosure, the vehicle 700 may be configured to include the above-mentioned Figure 24For example, one or more of the driver seat DS, the front passenger seat FPS, and the plurality of rear passenger seats RPS1, RPS2, and RPS3 may be configured to include the above-mentioned Figure 24 The vehicle seat 600 is described above, and therefore, repeated description thereof is omitted.

[0407] According to an embodiment of the present disclosure, the vehicle 700 can provide two-channel stereo or three-channel stereo or stereo including left-channel sound and right-channel sound to passengers sitting in the corresponding seats through headrests 750 and 770 located in one or more of the driver's seat DS, the front passenger seat FPS and a plurality of rear passenger seats RPS1, RPS2 and RPS3.

[0408] A headrest according to an embodiment of the present disclosure, and a chair and a vehicle including the same will be described below.

[0409] A headrest according to one or more embodiments of the present disclosure may include a headrest frame, a support rod portion connected to a lower surface of the headrest frame, a cushioning member on a front surface of the headrest frame, a sound-generating device that is arranged between the headrest frame and the cushioning member and outputs sound, and a cover member on a rear surface and side surfaces of the headrest frame and a front surface and side surfaces of the cushioning member.

[0410] According to one or more embodiments of the present disclosure, the sound generating device may include a piezoelectric material.

[0411] According to one or more embodiments of the present disclosure, the headrest frame may include a receiving portion for receiving the sound generating device.

[0412] According to one or more embodiments of the present disclosure, the buffer member may include a hollow portion corresponding to the accommodation portion.

[0413] According to one or more embodiments of the present disclosure, the headrest may further include a cushioning pad accommodated in the hollow portion of the cushioning member.

[0414] According to one or more embodiments of the present disclosure, the headrest may further include a sound blocking member located between a rear surface of the headrest frame and the cover member.

[0415] According to one or more embodiments of the present disclosure, the sound generating device may include a vibration member located in a headrest frame, and a vibration element connected to the vibration member and configured to vibrate the vibration member.

[0416] According to one or more embodiments of the present disclosure, the sound emitting device may further include a cover provided on the vibration element and configured to include a sound emitting portion corresponding to the vibration element.

[0417] According to one or more embodiments of the present disclosure, the headrest may further include a cushion in the cushion member. The cushion member may include a hollow portion corresponding to the sound-emitting portion of the cover. The cushion may be located between the cover member and the cover and may be accommodated in the hollow portion.

[0418] According to one or more embodiments of the present disclosure, the headrest frame may include: a base frame connected to the support rod portion and including a first area, a second area parallel to the first area, and a third area surrounding the first area and the second area; a first accommodating portion in the first area of the base frame; and a second accommodating portion in the second area of the base frame.

[0419] According to one or more embodiments of the present disclosure, the sound generating device may include a first vibration device located in a first accommodation portion of the headrest frame, and a second vibration device located in a second accommodation portion of the headrest frame.

[0420] According to one or more embodiments of the present disclosure, the first vibration device and the second vibration device may be configured to output different sounds.

[0421] According to one or more embodiments of the present disclosure, the first vibration device may include a vibration member accommodated in a first accommodation portion of the headrest frame and connected to the headrest frame, and a vibration element connected to the vibration member and configured to vibrate the vibration member. The second vibration device may include a vibration member accommodated in a second accommodation portion of the headrest frame and connected to the headrest frame, and a vibration element connected to the vibration member and configured to vibrate the vibration member.

[0422] According to one or more embodiments of the present disclosure, the vibration member may include one or more materials of metal, wood, rubber, plastic, carbon, glass, fiber, cloth, paper, mirror, and leather.

[0423] According to one or more embodiments of the present disclosure, the vibration element may include a vibration portion including a piezoelectric material, a cover member on at least one of a first surface of the vibration portion and a second surface of the vibration portion opposite to the first surface, and a signal supply member electrically connected to the vibration portion.

[0424] According to one or more embodiments of the present disclosure, a portion of the signal supply member may be accommodated between the cover member and the vibration part.

[0425] According to one or more embodiments of the present disclosure, the sound-emitting device may further include a cover configured to cover the first vibration device and the second vibration device. The cover may include a first sound-emitting portion having one or more holes overlapping with the first vibration device, and a second sound-emitting portion having one or more holes overlapping with the second vibration device.

[0426] According to one or more embodiments of the present disclosure, the buffer member may include a first hollow portion overlapping the first sound emission portion, and a second hollow portion overlapping the second sound emission portion.

[0427] According to one or more embodiments of the present disclosure, the headrest may further include a cushion in the cushion member. The cushion may include a first cushion accommodated in the first hollow portion, and a second cushion accommodated in the second hollow portion.

[0428] A headrest according to one or more embodiments of the present disclosure may include a headrest portion, a first sound-emitting device connected to a first side surface of the headrest portion, a second sound-emitting device connected to a second side surface of the headrest portion opposite the first side surface, and a cover member over the headrest portion, the first sound-emitting device, and the second sound-emitting device. Each of the first sound-emitting device and the second sound-emitting device may include a housing connected to the headrest portion, a cushioning member on a front surface of the housing, and a vibration device disposed between the housing and the cushioning member and configured to output sound.

[0429] According to one or more embodiments of the present disclosure, the first sound emitting device and the second sound emitting device may be configured to output different sounds.

[0430] According to one or more embodiments of the present disclosure, the first sound emitting device may be tilted at a first angle from a first side of the headrest portion, and the second sound emitting device may be tilted at a second angle from a second side of the headrest portion.

[0431] According to one or more embodiments of the present disclosure, the vibration device may include a piezoelectric material.

[0432] According to one or more embodiments of the present disclosure, a headrest portion may include a headrest frame, a buffer member at a front surface of the headrest frame, and a support rod portion connected to the headrest frame.

[0433] According to one or more embodiments of the present disclosure, the housing may include a receiving portion. The vibration device may include a vibration member located in the receiving portion, and a vibration element connected to the vibration member and configured to vibrate the vibration member.

[0434] According to one or more embodiments of the present disclosure, the vibration member may include one or more materials of metal, wood, rubber, plastic, carbon, glass, fiber, cloth, paper, mirror, and leather.

[0435] According to one or more embodiments of the present disclosure, the vibration element may include a vibration portion including a piezoelectric material, a cover member on at least one of a first surface of the vibration portion and a second surface of the vibration portion opposite to the first surface, and a signal supply member electrically connected to the vibration portion.

[0436] According to one or more embodiments of the present disclosure, a portion of the signal supply member may be accommodated between the cover member and the vibration part.

[0437] According to one or more embodiments of the present disclosure, each of the first sound emitting device and the second sound emitting device may further include a cover provided between the vibration device and the buffer member and including a sound emitting portion overlapping the vibration device.

[0438] According to one or more embodiments of the present disclosure, each of the first sound emitting device and the second sound emitting device may further include a sound blocking member located between the housing and the sheath member.

[0439] According to one or more embodiments of the present disclosure, the headrest may further include a third sound emitting device located on the headrest portion. The third sound emitting device may output a sound different from one or more of the first sound emitting device and the second sound emitting device.

[0440] According to one or more embodiments of the present disclosure, the third sound emitting device may include any one or more of a woofer, a mid-woofer, and a subwoofer.

[0441] According to one or more embodiments of the present disclosure, a headrest may include a headrest frame configured to accommodate a third sound generating device, a buffer member at a front surface of the headrest frame, and a support rod portion connected to the headrest frame.

[0442] According to one or more embodiments of the present disclosure, the headrest frame may include a sound emitting port that outputs the sound generated by the third sound emitting device.

[0443] According to one or more embodiments of the present disclosure, the third sound-emitting device may include: a first shell, housed in a headrest frame and including a sound space and a sound-emitting path; a second shell, on the first shell; an actuator, housed in the second shell and including a magnet and a coil; and a cover plate, disposed on the actuator and connected to the second shell.

[0444] According to one or more embodiments of the present disclosure, the headrest frame may include a receiving portion receiving the third sound emitting device, a first sound emitting port connected to a sound space of the third sound emitting device, and a second sound emitting port connected to a sound emitting path of the third sound emitting device.

[0445] According to one or more embodiments of the present disclosure, the headrest may further include a sound blocking member located between the headrest frame and the cover member.

[0446] A chair according to one or more embodiments of the present disclosure may include a seat portion, a backrest connected to the seat portion, and a headrest connected to an upper portion of the backrest. The headrest may include a headrest frame, a support rod connected to a lower surface of the headrest frame, a cushioning member on a front surface of the headrest frame, a sound-generating device disposed between the headrest frame and the cushioning member and configured to output sound, and a cover member on a rear surface and side surfaces of the headrest frame and a front surface and side surfaces of the cushioning member.

[0447] A chair according to one or more embodiments of the present disclosure may include a seat portion, a backrest connected to the seat portion, and a headrest connected to an upper portion of the backrest. The headrest may include a headrest portion, a first sound-emitting device connected to a first side surface of the headrest portion, a second sound-emitting device connected to a second side surface of the headrest portion opposite to the first side surface, and a sheath member over the headrest portion, the first sound-emitting device, and the second sound-emitting device. Each of the first sound-emitting device and the second sound-emitting device may include a shell connected to the headrest portion, a cushioning member on a front surface of the shell, and a vibration device disposed between the shell and the cushioning member and outputting sound.

[0448] A vehicle seat according to one or more embodiments of the present disclosure may include a seat cushion, a seat back connected to the seat cushion, and a headrest connected to an upper portion of the seat back. The headrest may include a headrest frame, a support rod connected to a lower surface of the headrest frame, a cushioning member on a front surface of the headrest frame, a sound-generating device disposed between the headrest frame and the cushioning member and configured to output sound, and a cover member on a rear surface and side surfaces of the headrest frame and a front surface and side surfaces of the cushioning member.

[0449] A vehicle seat according to one or more embodiments of the present disclosure may include a seat cushion, a seat back connected to the seat cushion, and a headrest connected to an upper portion of the seat back. The headrest may include a headrest portion, a first sound-emitting device connected to a first side surface of the headrest portion, a second sound-emitting device connected to a second side surface of the headrest portion opposite the first side surface, and a cover member over the headrest portion, the first sound-emitting device, and the second sound-emitting device. Each of the first sound-emitting device and the second sound-emitting device may include a housing connected to the headrest portion, a cushioning member on a front surface of the housing, and a vibration device disposed between the housing and the cushioning member and configured to output sound.

[0450] A vehicle according to one or more embodiments of the present disclosure may include a vehicle seat. The vehicle seat may include a seat cushion, a seat back connected to the seat cushion, and a headrest connected to an upper portion of the seat back. The headrest may include a headrest frame, a support rod connected to a lower surface of the headrest frame, a cushioning member on a front surface of the headrest frame, a sound-generating device disposed between the headrest frame and the cushioning member and configured to output sound, and a cover member on a rear surface and side surfaces of the headrest frame and a front surface and side surfaces of the cushioning member.

[0451] A vehicle according to one or more embodiments of the present disclosure may include a vehicle seat. The vehicle seat may include a seat cushion, a seat back connected to the seat cushion, and a headrest connected to an upper portion of the seat back. The headrest may include a headrest portion, a first sound-emitting device connected to a first side surface of the headrest portion, a second sound-emitting device connected to a second side surface of the headrest portion opposite to the first side surface, and a sheath member on the headrest portion, the first sound-emitting device, and the second sound-emitting device. Each of the first sound-emitting device and the second sound-emitting device may include a shell connected to the headrest portion, a cushioning member on a front surface of the shell, and a vibration device that is arranged between the shell and the cushioning member and outputs sound.

[0452] It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure as long as they come within the scope of the claims and their equivalents.

Claims

1. A headrest, comprising: headrest frame; a support rod portion connected to a lower surface of the headrest frame; a cushioning member on a front surface of the headrest frame; a sound generating device disposed between the headrest frame and the cushioning member and outputting sound; as well as A cover member is provided on the rear surface and side surfaces of the headrest frame and the front surface and side surfaces of the cushioning member.

2. The headrest according to claim 1, wherein The sound generating device includes a piezoelectric material.

3. The headrest according to claim 1, wherein The headrest frame includes a receiving portion for receiving the sound generating device.

4. The headrest according to claim 3, wherein: The buffer member includes a hollow portion corresponding to the accommodation portion. 5 . The headrest according to claim 4 , further comprising a cushioning pad accommodated in the hollow portion of the cushioning member. 6 . The headrest of claim 1 , further comprising a sound blocking member located between the rear surface of the headrest frame and the cover member.

7. The headrest according to claim 1, wherein The sound-generating device comprises: a vibration member located in the headrest frame; and A vibration element is connected to the vibration member and is configured to vibrate the vibration member.

8. The headrest according to claim 7, wherein: The sound generating device further includes a cover provided on the vibration element and configured to include a sound generating portion corresponding to the vibration element.

9. The headrest according to claim 8, further comprising a cushioning pad on the cushioning member, in, The buffer member includes a hollow portion corresponding to the sound-generating portion of the cover, and The buffer pad is located between the sheath member and the cover and is accommodated in the hollow portion.

10. The headrest according to claim 1, wherein The headrest frame comprises: a base frame connected to the support rod portion and comprising a first region, a second region parallel to the first region, and a third region surrounding the first region and the second region; a first receiving portion in the first region of the base frame; and A second receiving portion is provided in the second region of the base frame.

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