JP6247907B2 - Headrest device - Google Patents

Description

  The present invention relates to a headrest device.

  2. Description of the Related Art Conventionally, a headrest device in which a box-shaped speaker is built in a case member of a seat headrest is known (see, for example, Patent Document 1).

JP 2009-247388 A

However, the conventional headrest device has a complicated structure because a box-shaped speaker is separately provided on the caserest member.
The present invention has been made in view of the above-described circumstances, and an object thereof is to enable a speaker to be provided in a headrest device with a simple structure.

In order to achieve the above object, according to the present invention, the core material of the headrest body is formed in a sealed box shape and is covered with a cushion, and the front surface of the core material has an inner side of the core material. Provided is a headrest device characterized in that a recessed speaker housing recess is provided, and an acoustic speaker is disposed in the speaker housing recess .
Moreover, in the said structure, it is good also as a structure by which the said acoustic speaker is narrowly formed in the left-right direction and long in the up-down direction.
Moreover , it is good also as a structure by which the several acoustic speaker is arrange | positioned at the core material.

Furthermore, it is good also as a structure by which the left and right acoustic speakers are arrange | positioned outward in the left-right direction.
The headrest main body may include a subwoofer and a microphone, and the subwoofer may be disposed downward in the vertical direction of the microphone.
Moreover, it is good also as a structure by which a pair of attachment stay to a sheet | seat is connected with the said core material.
Moreover, it is good also as a structure by which the bass duct which connects the said hollow part to external space is connected with the hollow part of the said core material.
Further, an impact-resistant surface is formed on the core material of the headrest body, an opening is formed in the impact-resistant surface, the acoustic speaker is disposed inside the opening, and the acoustic speaker is a detail of a safety standard for road transport vehicles. It is good also as a structure arrange | positioned in the form suitable for the test using the headform defined in (1).

  According to the present invention, the speaker can be provided in the headrest device with a simple structure.

It is a perspective view which shows the headrest apparatus which concerns on embodiment of this invention. It is a perspective view which shows a headrest apparatus. It is the perspective view which decomposed | disassembled the headrest main body. It is a longitudinal cross-sectional view of a headrest apparatus. It is a longitudinal cross-sectional view of a headrest apparatus. It is a cross-sectional view of the headrest device. It is a front view of an acoustic speaker.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 are perspective views showing a headrest device 10 according to an embodiment of the present invention. In FIG. 1, illustration of a cushion core member 12 to be described later is omitted. In FIG. 2, illustration of the front surface of the cushion 13 described later is omitted.
The headrest device 10 is provided on a seat for an occupant disposed in a vehicle interior. Examples of the vehicle compartment include vehicle compartments such as automobiles, trains, airplanes, and ships. In this embodiment, the headrest device 10 is provided on a seat that is a front seat of an automobile and on which a driver sits. Will be described as an example. As an automobile, in addition to a normal four-wheeled vehicle, for example, a small electric vehicle not provided with a side door can be cited.
The seat (not shown) includes a seat surface portion (not shown) on which a driver (seater) sits, and a backrest portion (not shown) extending upward in a posture slightly inclined backward from the rear end of the seat surface portion. And a headrest device 10 attached to the upper end of the backrest portion.

The headrest device 10 includes an acoustic speaker 50 and an acoustic microphone 51, and also includes a communication unit (not illustrated) that enables the headrest device 10 to cooperate with other devices (not illustrated) such as a mobile terminal through short-range wireless communication. As said other apparatus, a mobile phone, a smart phone, a tablet terminal, etc. are mentioned, for example. Examples of the short-range wireless communication include Bluetooth (Near-Range Wireless Communication Standard: registered trademark). The headrest device 10 and the other devices can be connected not only by short-range wireless communication but also by wire, for example.
In a state in which the headrest device 10 is linked to the other device, the sound speaker 50 outputs sound data of content read from the other device, guidance sound data for guiding the vehicle to the destination, and the like from the acoustic speaker 50. To do. In addition, in the state where the headrest device 10 is linked to the other device, the seated person can operate the other device by using the voice collected by the acoustic microphone 51 as a voice command, or hands-free via the acoustic microphone 51. You can make a call.

  The headrest device 10 is provided so as to cover a frame 11 as a framework of the headrest device 10, a cushion core material 12 (core material) as a headrest body connected to the frame 11, and the cushion core material 12. And a cushion 13 for receiving a person's head. In the present embodiment, the headrest body is the cushion core material 12, but the headrest body only needs to be covered by the outermost cushion 13, and includes other members in addition to the cushion core material 12. Also good.

FIG. 3 is an exploded perspective view of the cushion core member 12 and the frame 11.
The frame 11 includes a pair of main frames 15 and 15 that extend in the vertical direction side by side in the left and right direction, an upper cross member 16 that connects the upper ends of the main frames 15 and 15 to the left and right, and a lower portion of the upper cross member 16. The lower cross member 17 which connects the main frames 15 and 15 to right and left is provided. The frame 11 is made of metal.
The main frames 15, 15 are formed in a pipe shape and are bent forward at the upper ends of the stay portions 18, 18 (attachment stays) extending substantially parallel to the backrest portion and the stay portions 18, 18 and somewhat. And inner frame portions 19 and 19 extending upward in a forward tilted posture.
The inner frame portions 19 and 19 are located inside the headrest device 10 inside the cushion 13. The stay portions 18 are inserted into attachment holes (not shown) formed on the upper surface of the backrest portion and fixed to the seat. The headrest device 10 is configured so that the height position of the attachment can be changed according to the physique of the seated person by adjusting the insertion depth of the stay portions 18 and 18 into the attachment hole portion.

The cushion core member 12 is formed in a sealed box shape by combining a substantially box-shaped front case 30 with an open rear surface and a substantially box-shaped rear case 31 with an open front surface at each other opening. Yes. The cushion core material 12 is formed in a substantially rectangular parallelepiped shape that is long in the vertical direction and the left-right direction and short in the front-back direction. The front case 30 and the rear case 31 are resin molded products.
The front case 30 and the rear case 31 have mating surfaces 32 and 33 at the peripheral edge of the opening, respectively. Specifically, the mating surfaces 32 and 33 are closed by fitting the mating surface 33 of the rear case 31 into the groove 32 a formed on the mating surface 32 of the front case 30. Between the mating surfaces 32 and 33, a frame-like packing (not shown) is interposed to improve the sealing performance. Further, the mating surfaces 32 and 33 may be sealed by joining, for example, by ultrasonic welding.

A plurality of fixing hole portions 20 are provided in front of the upper cross member 16 and the lower cross member 17, and a front case fixing bolt 21 (FIG. 5) for fixing the front case 30 to the frame 11 is fastened to the fixing hole portion 20. Is done. A plurality of fixing hole portions 22 are provided on the rear surfaces of the upper cross member 16 and the lower cross member 17, and a rear case fixing bolt 23 (FIG. 4) for fixing the front case 30 to the frame 11 is provided in the fixing hole portion 22. It is concluded.
The front case 30 includes a plurality of fixing portions 34 through which the front case fixing bolts 21 are inserted. The rear case 31 includes a plurality of fixing portions 35 through which the rear case fixing bolts 23 are inserted. Specifically, the fixing portions 34 and 35 are formed in a bottomed cylindrical shape that is recessed toward the inside of the cushion core member 12, and the front case fixing bolt 21 and the rear case fixing bolt 23 are inserted into the cylindrical bottom portion. Is done.

The front case 30 and the rear case 31 are arranged such that the frame 11 is sandwiched from the front and the rear and the mating surfaces 32 and 33 are fitted to each other, and the front case fixing bolt 21 and the rear case fixing bolt 23 provided from the outside are used as the frame. 11 is fixed. That is, the upper part of the frame 11 is located inside the cushion core member 12 formed in a hollow shape.
The cushion core material 12 includes stay through holes 36 and 36 in the lower part through which the stay portions 18 and 18 penetrate downward. A seal member (not shown) is provided between the stay through-holes 36 and 36 and the stay portions 18 and 18, and the inside of the cushion core material 12 is secured.

FIG. 4 is a longitudinal sectional view of the headrest device 10. FIG. 5 is a longitudinal sectional view of the headrest device 10. FIG. 6 is a cross-sectional view of the headrest device 10. Here, in FIG.4 and FIG.6, the cross section of the position which passes the acoustic speaker 50 is shown. In FIG. 5, the cross section of the center of the width direction of the headrest apparatus 10 is shown.
3 to 6, the front case 30 includes a partition plate portion 37 that extends substantially horizontally toward the rear case 31 at the lower portion inside. The rear case 31 includes an engagement portion 38 into which the rear end of the partition plate portion 37 is fitted at the lower portion inside.

The space inside the cushion core 12 is partitioned by a partition plate portion 37 into a lower storage portion 39 and an enclosure portion 40 (hollow portion) above the storage portion 39. The enclosure part 40 has a larger space than the storage part 39.
The cushion core member 12 includes a front surface 12a (partial surface) facing the back head H of the seated person, a rear surface 12b, a top surface 12c, a lower surface 12d, a right side surface 12e, and a left side surface 12f.

The cushion core member 12 is provided with a pair of left and right acoustic speakers 50, 50, an acoustic microphone 51, and a subwoofer 52. Specifically, the acoustic speakers 50 and 50, the acoustic microphone 51, and the subwoofer 52 are attached to the acoustic device attachment surface 41 that is the front surface of the enclosure unit 40 on the front surface 12 a.
The cushion core 12 is supplied with electric power to the control unit 53 that controls the acoustic speakers 50 and 50, the acoustic microphone 51, and the subwoofer 52, and to the acoustic speaker 50, acoustic microphone 51, subwoofer 52, and control unit 53. And a rechargeable battery 54. The control unit 53 and the battery 54 are stored in the storage unit 39. The communication unit is included in the control unit 53.
On the left side surface 12 f of the cushion core member 12, an interface unit 55 in which connection terminals, power switches, and the like from the outside to the control unit 53 and the battery 54 are disposed is provided.
The headrest device 10 includes a battery 54 and is provided separately and detachably with respect to the backrest portion of the seat, and can operate independently.

FIG. 7 is a front view of the acoustic speaker 50.
Each acoustic speaker 50 includes a substantially rectangular frame portion 56, a vibration plate 57 supported by the frame portion 56, and a drive unit (not shown) that includes a voice coil and a magnet and drives the vibration plate 57.
The diaphragm 57 is formed in an oval shape (race track shape) that is longer in the vertical direction than in the horizontal direction. More specifically, the outer shape of the diaphragm 57 is such that the left and right side edges 57a and 57a that extend in a straight line parallel to each other and a semicircular arc portion that connects the left and right side edges 57a and 57a at the upper end and the lower end, respectively. 57b, 57b.

  As shown in FIGS. 2 and 6, the acoustic device mounting surface 41 is an impact-resistant surface that receives the occipital head H of the seated person, and is a receiving surface portion that is formed substantially flat in plan view at the center in the width direction of the headrest device 10. 58 and speaker housing recesses 59, 59 that are recessed by one step toward the inside of the enclosure part 40 on the left and right sides of the receiving surface part 58. The bottom surfaces 59a of the speaker housing recesses 59, 59 are inclined so that the depths become deeper toward the outside in the width direction of the headrest device 10, and are provided with openings into which the acoustic speakers 50, 50 are fitted. The acoustic speakers 50, 50 are attached to the inclined bottom surface 59 a via the frame portion 56, and are arranged to be inclined outward. The sound S1 of the acoustic speakers 50, 50 is output forward from the front opening of the speaker housing recesses 59, 59.

As shown in FIG. 6, the acoustic speakers 50, 50 are arranged on the left and right edges of the acoustic equipment mounting surface 41 so as to be positioned on the left and right sides of the occipital head H, and the longitudinal direction thereof is directed in the vertical direction. To be arranged. The acoustic speakers 50, 50 are arranged with the diaphragm 57 facing forward so that the sound can be output substantially horizontally, and tilted outward so that the output sound spreads outward on the left and right sides toward the front side. Arranged.
Thus, since the headrest device 10 is provided with the vertically elongated acoustic speakers 50, 50, the lateral width of the headrest device 10 can be reduced while maintaining the overall size of the diaphragm 57. For this reason, while being able to ensure sound quality, when a seated person confirms back, the headrest apparatus 10 does not become obstructive and the visibility of back is good. In addition, the headrest device 10 has high versatility and can be applied to various types of vehicles because the lateral width does not increase even if the headrest device 10 includes the acoustic speakers 50 and 50.

Since the acoustic speakers 50 and 50 are elongated vertically, as shown in FIGS. 4 and 6, the sound S1 of the acoustic speakers 50 and 50 is output in a narrow range in the left-right direction and a wide range in the vertical direction. Is output. That is, the directivity of the sound S1 of the acoustic speakers 50, 50 is narrow in the left-right direction and wider in the up-down direction than in the left-right direction.
As a result, the sound S1 can be output in a wide range in the vertical direction, and a high-quality sound is always provided to the seated person regardless of the height position of the head of the seated person and the vertical adjustment position of the headrest device 10. it can. Moreover, since the sound S1 hardly spreads in the left-right direction, a personal acoustic space can be provided to the seated person, and the sound output from the headrest device 10 can be prevented from reaching the seat side next to the seated person.

  Furthermore, since the sound speakers 50 and 50 are arranged so as to be inclined outward so that the output sound S1 spreads to the left and right outside toward the front side, the left and right intervals between the sound speakers 50 and 50 are reduced. Even if the headrest device 10 is downsized, the sound can be spread left and right so that the sound reaches the ears of the seated person, and the seated person can feel a good stereo feeling.

Moreover, in this Embodiment, the acoustic speaker 50,50 is supported by the cushion core material 12, and the enclosure part 40 of the sealed hollow cushion core material 12 is used as an enclosure which reinforces a low sound. For this reason, it is not necessary to provide a dedicated enclosure, and the structure can be simplified. Moreover, since the cushion core material 12 having a relatively large internal space is used as an enclosure, the sound quality is good.
Furthermore, the pipe-shaped main frames 15 and 15 can be used as a low-frequency duct for communicating the enclosure portion 40 and the external space. In this case, for example, air is circulated in and out of the enclosure part 40 through the upper ends of the main frames 15 and 15 opened in the enclosure part 40 and the openings at the lower ends of the main frames 15 and 15 opened in the external space. be able to. Thereby, sound quality can be improved without providing a dedicated duct.

  As shown in FIGS. 3 and 5, the acoustic device mounting surface 41 includes a woofer mounting surface 60 to which the subwoofer 52 is mounted at the lower portion. Specifically, the woofer mounting surface 60 is provided at the center in the width direction of the cushion core member 12 below the speaker housing recesses 59, 59, and is inclined so as to face the front lower side. The subwoofer 52 is attached to the woofer attachment surface 60 so that the subwoofer 52 faces front and lower and outputs a sound S2 in front and lower. The diaphragm of the subwoofer 52 is driven by a drive unit (not shown) controlled by the control unit 53. In this way, by providing the subwoofer 52 downward, it is possible to transmit sound to the lower part of the seated person's body and to make it easier for the seated person to feel the bass.

  As shown in FIGS. 2, 3, and 5, the receiving surface portion 58 of the acoustic device mounting surface 41 includes a sound collecting portion 61 that is recessed toward the inside of the enclosure portion 40. The sound collection unit 61 is disposed in the center in the width direction of the headrest device 10 between the acoustic speakers 50, 50, and is disposed in the center in the vertical direction of the headrest device 10 above the subwoofer 52. Located behind. The sound collecting portion 61 is formed in a substantially conical shape that tapers toward the rear end side, and a substantially conical axis (not shown) of the sound collecting portion 61 extends substantially horizontally forward. A sound collection opening 61 a that takes sound into the sound collection unit 61 is formed on the front surface of the sound collection unit 61. Note that the sound collection unit 61 may have any shape that can collect sound, and is not limited to a substantially conical shape. The sound collection unit 61 may have a substantially pyramid shape or a substantially truncated cone shape, for example.

The acoustic microphone 51 is disposed in the sound collection unit 61. Specifically, the acoustic microphone 51 is formed in a columnar shape, and is arranged at the center of the sound collection unit 61 so that the axis L thereof substantially coincides with the axis of the sound collection unit 61. In this way, by providing the acoustic microphone 51 in the sound collection unit 61, sound can be efficiently collected by the acoustic microphone 51. Therefore, even if the voice is emitted forward by the seated person, the acoustic microphone 51 can reliably Can receive sound.
The acoustic microphone 51 is disposed at a position closest to the surface of the back of the head H at the upper and lower central portions of the headrest device 10. Since the voice of the seated person is radiated into the air not only by the mouth and nostril, but also by vibration of the surface of the head, the acoustic microphone 51 is placed close to the head as in the present embodiment, so that the seated person Can be efficiently collected by the acoustic microphone 51.
In addition, in the conventional configuration in which the bone conduction microphone is built in the headrest, the sound cannot be sufficiently collected unless the headrest is at least attached to the headrest. In a vehicle, a seated person usually has a head on the headrest. Since it is rare to operate while attached, it was difficult to collect sound. However, in the present embodiment, sound can be collected by the acoustic microphone 51 without attaching a head to the headrest device 10, which is easy to use.
Further, the voice of the seated person is not only collected by the acoustic microphone 51 directly from the seated person, but also collected by being reflected by an object such as a surrounding windshield. Since the sound is collected from the sound collection opening 61a that opens forward, the sound from the side and the back can be suppressed from being collected by the acoustic microphone 51, and the seated person's voice can be received accurately. . That is, the sound collection unit 61 constitutes a sound collection mechanism that preferentially collects sound from the front.

In addition, the acoustic microphone 51 is disposed at a position deep inside the sound collection unit 61, and the front end 51 a of the acoustic microphone 51 is located behind the surface of the receiving surface portion 58. For this reason, it is possible to prevent the back head H from touching the acoustic microphone 51.
The acoustic microphone 51 and the acoustic speakers 50 and 50 are technical standards, specifically, “Notification (2005.11.09) Attachment 30 (Technical Standards for Seats and Seat Mounting Devices” that defines the details of safety standards for road transport vehicles. ) ”Is considered.

  In the present embodiment, the acoustic speakers 50 and 50, the subwoofer 52, and the acoustic microphone 51 are arranged so as to conform to the internal protrusion requirements and the R (curvature radius) requirements of the security standard. Specifically, the acoustic microphone 51 is disposed in a deep position in the sound collection unit 61, so that a sphere (headform) having a diameter of 165 mm for measurement is difficult to contact with the acoustic microphone 51 and is in contact with the acoustic microphone 51. Even in this case, the contact portion is arranged to meet the R requirement.

  Further, the acoustic speakers 50, 50 are disposed at positions recessed in the speaker housing recesses 59, 59, and the subwoofer 52 is disposed at a position recessed from the acoustic device mounting surface 41, so that the headform having the diameter of 165 mm is formed. The acoustic speakers 50 and 50 and the subwoofer 52 are not easily brought into contact with the subwoofer 52, and the contact portion is arranged so as to meet the R requirement even when contacted.

In the present embodiment, since the acoustic microphone 51 is provided inside the cushion 13, the wind flowing into the vehicle does not directly touch the acoustic microphone 51. For this reason, it is possible to prevent the acoustic microphone 51 from collecting wind noise, and noise input to the acoustic microphone 51 can be reduced.
In addition, since the acoustic microphone 51 is provided on the cushion core member 12, the wiring connecting the acoustic microphone 51 and the control unit 53 can be provided in the headrest device 10, and the troublesomeness of the wiring can be eliminated. Moreover, since the acoustic microphone 51 is built in the headrest device 10, the acoustic microphone 51 does not interfere with the seated person.

In addition, since the acoustic microphone 51 is disposed between the acoustic speakers 50 and 50 and the acoustic speakers 50 and 50 are disposed outward, the sound S1 of the acoustic speakers 50 and 50 is directly received by the acoustic microphone 51. And the acoustic microphone 51 can be prevented from being affected by the sound S1.
Further, since the subwoofer 52 outputs the sound S2 forward and downward below the acoustic microphone 51, the sound S2 can be prevented from being directly received by the acoustic microphone 51, and the acoustic microphone 51 affects the sound S2. Can be prevented. Further, since the subwoofer 52 outputs the sound S2 from the rear side of the back of the head H to the front and lower side, the sound S2 is transmitted to the seated person mainly through the trunk part of the seated person having a larger volume than the head. . For this reason, a seated person can be made to feel a low sound easily and a powerful low sound can be provided.

Moreover, the subwoofer 52 is supported by the enclosure part 40 of the sealed hollow cushion core material 12 similarly to the acoustic speakers 50, 50, and uses the enclosure part 40 as an enclosure that enhances bass. For this reason, it is not necessary to provide a dedicated enclosure, and the structure can be simplified. Moreover, since the cushion core material 12 having a relatively large internal space is used as an enclosure, the sound quality is good.
That is, the acoustic speakers 50 and 50 and the subwoofer 52 share the enclosure portion 40 of the cushion core material 12 as an enclosure. Here, when the acoustic speakers 50 and 50 and the subwoofer 52 are provided in the same enclosure unit 40, it may be considered that the sound quality is affected by mutual interference, but the headrest device 10 is close to the head. Since the sound output is relatively small, the influence of the interference is small.

  Further, the fixing portion 34 (FIG. 2) through which the front case fixing bolt 21 is inserted is between the acoustic speakers 50 and 50 above the acoustic microphone 51 and on the left and right sides of the subwoofer 52 below the acoustic speakers 50 and 50. It is provided for each. For this reason, the front case 30 can be fixed by the fixing portion 34 provided at a position where the front case 30 can be firmly fixed while the acoustic speakers 50, 50, the acoustic microphone 51, and the subwoofer 52 are arranged in a well-balanced manner. 12 sealing properties can be secured.

As shown in FIGS. 4 to 6, the cushion 13 includes a front cushion portion 62 that covers the front surface 12 a of the cushion core member 12, and a rear cushion portion 63 that covers the remaining surface of the cushion core member 12.
The rear side cushion part 63 covers the rear surface 12b, the right side surface 12e, the left side surface 12f, the rear surface of the lower surface 12d, and the rear surface of the top surface 12c, which are the remaining surfaces. The front cushion portion 62 covers the entire front surface 12a, the front portion of the lower surface 12d, and the front portion of the top surface 12c. The front cushion portion 62 and the rear cushion portion 63 are joined together at the edges to form a bag shape, and are attached to the cushion core 12 so as to be covered.

The rear cushion 63 includes two layers, an attenuation layer 63a made of a material that attenuates sound with high efficiency, and a sound insulation layer 63b made of a material with high sound insulation.
The attenuation layer 63a is made of, for example, a resin having high sound absorption performance such as urethane and having high cushioning properties. As the urethane, for example, a high sound-absorbing property can be obtained by using an open-cell body having a porous structure.

The sound insulation layer 63b is made of a soft resin material that can be sewn and has high vibration (sound) attenuation and sound insulation. The sound insulation layer 63b is made of, for example, an elastomer, and as an example, is made of an olefin-based thermoplastic elastomer.
The attenuation layer 63a is an inner layer that is in close contact with the rear surface 12b of the cushion core member 12, and the sound insulation layer 63b is an outer layer that is exposed to the outside. The outer surface of the attenuation layer 63a and the inner surface of the sound insulation layer 63b are in close contact with each other, and the attenuation layer 63a and the sound insulation layer 63b are integrated. The attenuation layer 63a is formed thicker than the sound insulation layer 63b.
That is, the rear side cushion part 63 is made of a material that can provide cushioning as a headrest and that can efficiently attenuate and insulate sound.

The front cushion 62 is a so-called fiber pad, which is a three-dimensional mesh cushion formed by knitting a fibrous body into a three-dimensional mesh. Examples of the fiber body include a polypropylene fiber body and a mixed fiber body of polypropylene and polyethylene terephthalate. In detail, the front cushion part 62 is provided with the front cushion part main body 62a which consists of the said three-dimensional net-like cushion body, and the front pad part 62b which covers the surface of the front cushion part main body 62a. The front pad portion 62b is constituted by a three-dimensional mesh cushion body having a mesh that is coarser than that of the front cushion portion main body 62a.
The front cushion portion 62 has high cushioning properties and high sound permeability and breathability due to the three-dimensional network structure. That is, the front cushion part 62 is made of a material having cushioning properties as a headrest and capable of passing sound efficiently.

  Sounds S1 and S2 output forward from the acoustic speakers 50 and 50 and the subwoofer 52 are output forward through the front cushion portion 62 having high sound permeability. On the other hand, the sound output rearward from the acoustic speakers 50 and 50 and the subwoofer 52 is attenuated and blocked in the headrest device 10 by the rear side cushion portion 63, and is hardly output outside the rear. Specifically, the sound output backward from the acoustic speakers 50 and 50 and the subwoofer 52 is first attenuated and attenuated by the attenuation layer 63a, and then attenuated and sound-insulated by the sound insulation layer 63b. The sound to be output can be effectively insulated. Thereby, while being able to supply a sound forward through the front cushion part 62 with high sound permeability, the sound leaking backward can be reduced by the rear cushion part 63, a personal acoustic space can be provided to the seated person.

In addition, the front cushion portion 62 is made of a material with a substantially sound-permeable front surface, and the front cushion portion 62 has an effect on sound as compared with a configuration in which a sound passage hole or the like is provided in a part of the cushion. Can be reduced. For this reason, the sound quality of the headrest device 10 is good. Moreover, in the structure provided with the above-described sound hole, the sound hole may be blocked by the head, and in this case, the sound quality is deteriorated. On the other hand, in the present embodiment, the substantially front surface of the front cushion portion 62 is made of a material with good sound transmission, and the entire front cushion portion 62 is not blocked by the head. Good sound quality is obtained. Here, the portion formed of the material having good sound transmission in the front cushion portion 62 may be provided over a region wider than the region of the projection portion in which the head is projected on the front cushion portion 62 side in the front view. desirable. That is, it is desirable that the portion of the front cushion portion 62 made of a material with good sound transmission is provided up to a range that is not hidden by the head when viewed from the front with the head in contact with the headrest device 10.
Further, since the voice of the seated person is input to the acoustic microphone 51 through the front cushion part 62 having high sound permeability, the voice can be suppressed from being attenuated by the front cushion part 62, and the voice can be correctly spoken to the acoustic microphone 51. Can be entered.
In addition, since the sound input to the headrest device 10 from behind or from the side can be reduced by the rear cushion 63, the acoustic microphone 51 can correctly receive the sound from the front.

  As described above, according to the embodiment to which the present invention is applied, the cushion core material 12 has a sealed structure, and the acoustic speaker 50, 50 is disposed on the cushion core material 12. It can be used as the enclosure part 40 of the acoustic speakers 50 and 50. For this reason, the acoustic speakers 50 and 50 can be provided in the headrest device 10 with a simple structure.

Further, since the acoustic speakers 50, 50 are narrow in the left and right direction and long in the vertical direction, the directivity in the vertical direction of the sound of the acoustic speakers 50, 50 can be widened. High sound quality can be provided regardless of the height position of the listener. Moreover, the headrest apparatus 10 can be formed compactly on either side.
Moreover, one cushion core material 12 can be used as the enclosure part 40 of the some acoustic speakers 50 and 50, and a structure can be simplified.

Furthermore, the left and right acoustic speakers 50, 50 are arranged outward in the left-right direction, and the sound S1 spreads to the outside of the left and right. Therefore, even when the headrest device 10 is compacted to the left and right, a good stereo feeling is obtained. Can be obtained.
In addition, since the cushion core material 12 includes the subwoofer 52 and the subwoofer 52 is disposed downward in the vertical direction of the cushion core material 12, the subwoofer 52 is mainly disposed below the head of the seated person. Sound can be transmitted, and the bass can be easily felt by the seated person.

In addition, since the pair of stay portions 18 and 18 to the seat are coupled to the cushion core material 12, the support rigidity of the cushion core material 12 can be improved using the stay portions 18 and 18.
Moreover, it is good also as a structure by which the main frames 15 and 15 as a bass duct are connected with the hollow part of the cushion core material 12. FIG.
In this case, since the main frames 15 and 15 as low-frequency ducts are connected to the hollow portion of the cushion core member 12, desired speaker characteristics can be obtained by adjusting settings such as the size of the low-frequency duct.
Furthermore, an acoustic device mounting surface 41 as an impact resistant surface is formed on the cushion core member 12, and openings are formed in speaker housing recesses 59, 59 of the acoustic device mounting surface 41, and the acoustic speakers 50, 50 are placed inside the opening. Since the acoustic speakers 50, 50 are arranged in a form that conforms to the test using the headform defined in the safety standards of the road transport vehicle, the acoustic speakers 50, 50 have a simple structure on the headrest device 10. As well as meeting safety standards.

Moreover, according to the embodiment to which the present invention is applied, the acoustic device attachment surface 41 as an impact resistant surface is formed on the cushion core member 12, and the sound collection opening 61 a is formed on the acoustic device attachment surface 41. The acoustic microphone 51 is disposed inside the opening 61a. As a result, sound can be efficiently collected by the acoustic microphone 51 through the sound collection opening 61a, and the head is strongly in contact with the sound microphone 51 by arranging the sound microphone 51 inside the sound collection opening 61a. It is possible to prevent a large impact from occurring, and the impact standard can be satisfied.
In addition, since the acoustic microphone 51 is arranged in a form suitable for a test using a headform defined in the safety standards of road transport vehicles, the acoustic microphone 51 efficiently collects sound through the sound collection opening 61a. As well as meeting certain security standards.

In addition, since the sound collection unit 61 is disposed between the sound collection opening 61 a of the cushion core member 12 and the acoustic microphone 51, the sound collection unit 61 can efficiently collect sound on the acoustic microphone 51.
Further, since the sound collecting mechanism is configured by the substantially conical sound collecting unit 61, sound can be collected efficiently by the acoustic microphone 51.
Furthermore, since the sound collection opening 61 a is formed on the front surface of the cushion core member 12, sound from the front can be efficiently collected by the acoustic microphone 51.
In addition, since the plurality of acoustic speakers 50 and 50 are arranged around the acoustic microphone 51 and the acoustic speakers 50 and 50 are arranged outward with respect to the acoustic microphone 51, the sound S1 of the acoustic speakers 50 and 50 is collected in the acoustic microphone 51. The sound can be suppressed.
In addition, since the front of the acoustic microphone 51 is covered with the front cushion portion 62 made of a material that allows sound to pass through, the sound can be efficiently collected by the acoustic microphone 51.

  In addition, according to the embodiment to which the present invention is applied, the acoustic speakers 50 and 50 are arranged on the cushion core member 12, and the front surface 12a, which is a part of the cushion core member 12, is made of a material through which sound can easily pass. The front cushion 62 is covered, and the remaining surface is covered with two layers of a damping layer 63a made of a material that attenuates sound and a sound insulating layer 63b that is a material having high vibration damping and sound insulating properties. Thereby, sound can be output from the front surface 12a of the cushion core member 12 through the front cushion portion 62, and the sound output from the remaining surface can be reduced by the two layers of the attenuation layer 63a and the sound insulation layer 63b. For this reason, according to the intended purpose, a sound can be output to the direction which the front surface 12a of the cushion core material 12 faces.

Further, since the attenuation layer 63a is the inner layer and the sound insulation layer 63b is the outer layer, the sound attenuated by the attenuation layer 63a can be insulated by the sound insulation layer 63b, and the sound output from the remaining surface can be efficiently reduced. Can do.
Further, since the attenuation layer 63a and the sound insulation layer 63b are in close contact with each other, the movement of the attenuation layer 63a can be restricted by the sound insulation layer 63b, and the attenuation of vibration (sound) of the sound insulation layer 63b can be improved.
Furthermore, since the part of the surface is substantially the entire front surface of the cushion core member 12, it is possible to output sound forward without leaking sound in other directions, and to provide a personal acoustic space for the seated person.

In addition, since the material through which sound can easily pass is the fiber pad, the sound emitted from the front surface 12a can be passed well, and good cushioning properties can be obtained on the front surface 12a side.
Furthermore, since the attenuation layer 63a is made of a urethane material, it is possible to effectively attenuate sound emitted from the remaining surface.
In addition, since the sound insulation layer 63b is made of an elastomeric material, the sound emitted from the remaining surface can be effectively attenuated and sound insulation.

In addition, the said embodiment shows the one aspect | mode which applied this invention, Comprising: This invention is not limited to the said embodiment.
In the above-described embodiment, the headrest device 10 has been described as being provided separately and detachably with respect to the backrest portion of the seat. However, the present invention is not limited to this, for example, the headrest device The device 10 may be provided integrally with the backrest portion.
In the above-described embodiment, the subwoofer 52 is described as having a diaphragm driven by a drive unit. However, the present invention is not limited to this, and for example, the subwoofer 52 does not have a drive unit and resonates with the acoustic speakers 50 and 50. Then, it may be a passive radiator that outputs sound.

  Moreover, in the said embodiment, the front surface 12a which is a one part surface of the cushion core material 12 is covered with the front cushion part 62 comprised with the material which can permeate | transmit sound easily, and the remaining surface is covered with the attenuation layer 63a and the sound insulation. Although described as covering with two layers of the layer 63b, this invention is not limited to this. For example, at least one of the right side surface 12e and the left side surface 12f of the cushion core material 12 is covered with a material that allows sound to pass as a part of the surface, and an acoustic speaker is provided so that sound can be output to the side. The remaining surface of the material 12 may be covered with two layers of an attenuation layer and a sound insulation layer. In this case, for example, when it is sensed that a vehicle, a pedestrian, or the like is present on the side based on the situation around the vehicle, a sound is emitted from the corresponding side surface of the headrest device to notify the presence of the vehicle. be able to. The top surface 12c of the cushion core material 12 is covered with a material that allows easy passage of sound as a part of the surface, and an acoustic speaker is provided so that sound can be output upward. And it is good also as a structure covered with two layers of a sound-insulation layer.

10 Headrest device 12 Cushion core material (core material, headrest body)
18, 18 Stay part (attachment stay)
40 Enclosure part (hollow part)
41 Acoustic equipment mounting surface (shock resistant surface)
50, 50 Acoustic speaker 51 Acoustic microphone 52 Subwoofer

Claims (8)

The core material of the headrest body is formed in a sealed box shape, and the periphery is covered with a cushion. A speaker housing recess that is recessed toward the inside of the core material is provided on the front surface of the core material, and the speaker A headrest device , wherein an acoustic speaker is disposed in the housing recess .   The headrest device according to claim 1, wherein the acoustic speaker is narrow in the left-right direction and long in the up-down direction. The headrest device according to claim 1, wherein a plurality of acoustic speakers are arranged on the core member.   The headrest device according to claim 3, wherein the left and right acoustic speakers are arranged outward in the left-right direction.   The headrest device according to any one of claims 1 to 4, wherein the headrest main body includes a subwoofer, and the subwoofer is disposed vertically downward of the headrest main body.   The headrest device according to any one of claims 1 to 5, wherein a pair of attachment stays to the seat is connected to the core member. The headrest device according to any one of claims 1 to 6 , wherein a bass duct for connecting the hollow portion to an external space is connected to the hollow portion of the core member.   An impact-resistant surface is formed in the core material of the headrest body, an opening is formed in the impact-resistant surface, the acoustic speaker is disposed inside the opening, and the acoustic speaker is defined in detail of safety standards for road transport vehicles. The headrest device according to claim 1, wherein the headrest device is arranged in a form suitable for a test using a headform.

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