JP7366369B2 - vehicle seat - Google Patents

Description

The present invention relates to a seat for a vehicle (bus, railway vehicle, aircraft, ship, etc.), and specifically to a seat for a vehicle equipped with a sound generating device.

In both automobiles and railway vehicles, there is a need to reduce the weight of car bodies in order to reduce the environmental burden, and weight reduction measures are being implemented from various directions such as car bodies, equipment, and mechanical parts.

On the other hand, in order to pursue comfort inside the car, improvements in noise and vibration are becoming more important as evaluation indicators, and considerations such as optimization of car body structure and materials, placement of vibration damping materials, etc. are taken from the design stage. This requires advanced vehicle manufacturing technology. In particular, noise is an important issue, as the impact increases rapidly as vehicle speeds increase.In order to achieve comfort for passengers and passengers, efforts are being made to reduce noise in each element of the vehicle body and parts. It is necessary to. For example, with regard to noise generated by internal combustion engines, measures can be taken to reduce mechanical vibrations by improving accuracy, trapping noise by placing sound insulating materials, and making the source itself quieter by replacing internal combustion engines with electric motors. .

Regarding noise from the external environment, especially in railway vehicles, when passing by an oncoming vehicle, the surrounding air pressure is compressed, resulting in a bursting impact sound, or the impact is caused by changes in air pressure when entering a tunnel. , changes in the state of contact with overhead wires, changes in air pressure when approaching structures, etc. Noise originating from impacts caused by atmospheric pressure changes is distributed in the audible range and at low frequencies, and countermeasures such as making the metal plates of the car body structure thicker can be considered to physically shield them, but this increases the weight of the car. It is possible that it will happen. In addition, there are many cases of highways and railways optimizing routes through tunnels in mountainous sections, and because the passage speed is high, it is especially important to solve the noise generation caused by the impact when entering structures. This is a challenge.

As a means of suppressing noise generated from outside the vehicle, active noise canceler technology uses a sound collector to collect noise components, analyzes the acoustic components, and cancels out the noise by generating sound with an opposite phase. , has been studied as a vehicle noise reduction technology (Patent Documents 1 to 3).

However, installation of active noise cancellers has been considered mainly for passenger cars, especially private cars equipped with audio equipment. This is because the target number of seats is only for a few people, and the vehicle body size is limited, so it is not possible to design the vehicle body structure, materials, etc. from the vehicle body design stage with the assumption that the system will be installed. can.

On the other hand, for large vehicles such as buses, trains, and airplanes that carry a large number of passengers, there have been few cases in which installation of active noise cancelers has been considered. Most of the cases involved providing passenger comfort by means such as

Japanese Patent Application Publication No. 5-35281 Japanese Patent Application Publication No. 10-143166 Japanese Patent Application Publication No. 2012-103329

The present inventors have studied the provision of an active noise canceller in the upper part of the backrest of vehicle seats, particularly seats for large vehicles such as buses, railway cars, and airplanes in which many people ride. Furthermore, if an active noise canceller or a sound generator of an audio device is installed on the top of a ready-made backrest that already has a certain degree of rigidity, the weight of the backrest will increase, making it difficult to reduce the weight of the seat as mentioned at the beginning. I came across this problem.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the weight of the seat by providing a sound generating device above the backrest while ensuring the rigidity of the backrest and suppressing an increase in weight.

[1] The vehicle seat of the present invention includes:
A sound generator consisting of a speaker attached to a speaker box is installed at the top of the backrest.
For vehicles, in which the backrest frame, which is the skeleton of the backrest, includes left and right vertical frame members extending in the vertical direction, and a plurality of reinforcing members extending in the left and right direction that connect and reinforce the left and right vertical frame members at a plurality of height locations. In the seat,
The speaker box has left and right side plates formed by upper predetermined ranges of the left and right vertical frame members, and left and right side plates that connect the left and right vertical frame members at lower ends of the upper predetermined ranges and function as one of the plurality of reinforcing members. a lower lid body extending in the direction; an upper lid body that connects the left and right vertical frame members at the upper ends of a predetermined upper region and functions as one of the plurality of reinforcing members; these side plate parts, the lower lid body, and the upper lid. A vehicle seat characterized by comprising a front baffle plate and a rear lid body respectively covering the front side and the rear side between the bodies.

<Effect>
The lower and upper lids both serve as a part of the speaker box and a reinforcing member that connects and reinforces the upper portions of the left and right vertical frame members, ensuring the rigidity of the backrest frame. At the same time, weight increase can be suppressed.

Here, the speaker box includes a partition plate that connects the lower lid body and the upper lid body at the middle part in the left-right direction and partitions the internal space of the speaker box, and the partition plate increases the rigidity of the backrest frame. preferable.

The plurality of reinforcing members include a first reinforcing member that connects the left and right vertical frame members at a lower portion, and a second reinforcing member that connects the left and right vertical frame members at an intermediate height portion lower than the lower lid body. is preferred.

Preferably, the front baffle plate is curved so that the left and right parts protrude forward with respect to the middle part in the left-right direction, and speakers are preferably attached to at least the left and right parts, respectively.

5. The vehicle seat according to claim 4, wherein one or two speakers aligned in the left-right direction are attached to an intermediate portion of the front baffle plate.

Preferably, the backrest frame, the lower lid, and the upper lid are made of aluminum alloy.

The front baffle plate and the rear lid are preferably made of aluminum alloy or resin.

The sound generating device can be used as a sound generating section of either or both of an active noise canceller and an audio device.

It is preferable that a head protection member is stretched in front of the sound generator to prevent the head of the occupant or passenger from coming into contact with the sound generator.

Preferably, the head protection member is made of a mesh material having sound transparency and elasticity.

Preferably, the skin member mounted on the surface of the backrest is made of a sound-transparent material in a portion located in front of the sound generating device.

According to the vehicle seat of the first aspect, the sound generating device can be provided on the upper part of the backrest while ensuring the rigidity of the backrest and suppressing an increase in weight, and the weight of the seat can be reduced.
According to the vehicle seat of the second aspect, the rigidity of the backrest can be further increased.
According to the vehicle seat of the third aspect, the intermediate height region and the lower part of the backrest, which require further strength, can be reinforced.
According to the vehicle seat according to claims 4 and 5, it is possible to further optimize the sound generation from the sound generating device.
According to the vehicle seat of claims 6 and 7, the weight of the backrest can be further reduced.
According to the vehicle seat of claim 8, the sound generator can be an active noise canceller or a sound generator of an audio device.
According to the vehicle seat of claim 9, it is possible to prevent the occupant's or passenger's head from coming into contact with the sound generating device.
According to the vehicle seat of claims 10 and 11, the effect of the sound generator is not reduced.

FIG. 1 is a perspective view showing a two-person vehicle seat according to an embodiment. FIG. 2 is a perspective view showing the internal structure of one of the seats, excluding the cushion and upholstery. FIG. 3 is a perspective view of the lower lid attached to the backrest frame of the seat. FIG. 4 is a perspective view of the partition plate and the upper lid when attached to the same backrest frame. FIG. 5 is a perspective view of a front baffle plate and a rear lid body attached to the same backrest frame. FIG. 6 is a perspective view when the speaker box has been attached to the backrest frame. FIG. 7 is a perspective view when various accessories are attached to the same backrest frame. FIG. 8 is a perspective view when the speaker is attached to the same speaker box. FIG. 9 is a perspective view when the head protection member mounting bracket is attached to the same speaker box. FIG. 10 is a perspective view when the head protection member is attached to the head protection member mounting bracket. FIG. 11 is a perspective view of the head protection member attached to the head protection member mounting bracket.

A sound generator consisting of a speaker attached to a speaker box is installed at the top of the backrest.
For vehicles, in which the backrest frame, which is the skeleton of the backrest, includes left and right vertical frame members extending in the vertical direction, and a plurality of reinforcing members extending in the left and right direction that connect and reinforce the left and right vertical frame members at a plurality of height locations. In the seat,
The speaker box has left and right side plates formed by upper predetermined ranges of the left and right vertical frame members, and left and right side plates that connect the left and right vertical frame members at lower ends of the upper predetermined ranges and function as one of the plurality of reinforcing members. a lower lid body extending in the direction; an upper lid body that connects the left and right vertical frame members at the upper ends of a predetermined upper region and functions as one of the plurality of reinforcing members; these side plate parts, the lower lid body, and the upper lid. The speaker box includes a front baffle plate and a rear lid that respectively cover the front and rear sides of the space between the speakers, and a partition plate that connects the lower lid and the upper lid at the middle portion in the left-right direction and partitions the internal space of the speaker box.
The plurality of reinforcing members include a first reinforcing member that connects the left and right vertical frame members at a lower portion, and a second reinforcing member that connects the left and right vertical frame members at an intermediate height portion lower than the lower lid.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle seat according to an embodiment of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the embodiments, and the configuration and shape of each part can be changed as desired without departing from the gist of the invention. As shown in FIG. 1, this embodiment has a two-person configuration in which two vehicle seats 1 of the same shape are arranged in parallel.
Each vehicle seat 1 includes a seat 2, a backrest 10, and a sound generator 27.

[seat]
As shown in FIG. 2, which shows the internal structure excluding the cushion 3 of one seat, the seat 2 has a seat frame 4 that is the skeleton of the seat, and a cushion support member 5 is stretched over the seat frame 4. . The cushion support member 5 is made of a cloth material that can be expanded and contracted by a predetermined amount, and suppresses vibrations from the vehicle body to the passengers via the cushion 3 loaded on top of the cushion support member 5. Metal wires are inserted into the left and right ends and the front end of the cushion support member 5 to maintain the shape of the cushion support member 5. In addition, one end of the coil spring 6 is hooked into the opening hole of the seat frame 4, and the other end is hooked onto a metal wire, so that the cushion support member 5 is stretched and its positional relationship with the seat frame 4 is maintained. Ru.

[Backrest]
The backrest 10 has a backrest frame 15, which is the skeleton of the backrest, as shown in FIG. 2, which shows the internal structure excluding the skin material 11 of one seat. The backrest frame 15 includes left and right vertical frame members 15A and 15B that extend in the vertical direction, and a plurality of reinforcing members (described later) that extend in the left and right direction and connect and reinforce the left and right vertical frame members at a plurality of height locations. . The backrest support member 12 is stretched between backrest support member fixing fittings 31A and 31B fixed to the vertical frame members 15A and 15B. The backrest support member 12 is made of a material made of cloth that can be expanded and contracted by a predetermined amount. Metal wires are inserted into both left and right ends of the backrest support member 12 to maintain the shape of the backrest support member 12. In addition, one end of the coil spring 14 is hooked to the opening hole of the backrest support member fixing fittings 31A, 31B, and the other end is hooked to a metal wire, so that the backrest support member 12 is stretched, and the vertical frame member 15A, The positional relationship with 15B is maintained.

The plurality of reinforcing members include a first reinforcing member 16 (in this example, a pipe material) that connects the left and right vertical frame members 15A and 15B at the bottom, and a middle height part (lower than the lower lid body described later). It includes a second reinforcing member 17 to be connected (a pipe material in this example), a lower lid body (a pipe material in this example) to be connected at a portion to be described later, and an upper lid body (a plate material in this example) to be connected to a portion to be described later. .

Further, the rear end portion of the cushion support member 5 and the lowermost end portion of the backrest support member 12 are connected to each other by means such as suturing or adhesion. This has the effect of dispersing the weight from the backrest 10 and the seat 2 to a certain extent when the passenger is seated, so it is also possible to prevent the weight from being concentrated on a specific part.

[Sound generator]
The sound generating device 27 includes a speaker 25 attached to a speaker box 20, and is provided at the upper part of the backrest 10 (at a height where the passenger's head is located).

The speaker box 20 connects the left and right side plates formed by the upper predetermined ranges of the left and right vertical frame members 15A, 15B, and the left and right vertical frame members 15A, 15B at the lower ends of the upper predetermined ranges, and connects the plurality of reinforcing members. A lower lid body 26 extending in the left-right direction and functioning as one, and an upper lid body 21 functioning as one of the plurality of reinforcing members by connecting the left and right vertical frame members 15A, 15B at the upper ends of a predetermined upper range. , includes a front baffle plate 23 and a rear lid body 24 that respectively cover the front side and the rear side between these (upper predetermined ranges 15A, 15B, 26 and 21).

Furthermore, the speaker box 20 includes a partition plate 22 that connects the lower lid body 26 and the upper lid body 21 at the middle part in the left-right direction and partitions the internal space of the speaker box 20. Increased rigidity such as torsional rigidity.

The front baffle plate 23 is curved so that the left and right parts protrude forward with respect to the middle part in the left-right direction, and the speakers 25 are attached to openings formed in the left and right parts, respectively. Two speakers 25 arranged in the left-right direction are attached to an opening formed in the middle part.

Although the backrest frame 15, lower lid 26, upper lid 21, front baffle plate 23, and rear lid 24 are made of aluminum alloy in this example, they may be modified.

The sound generator is a sound generator for both an active noise canceller and an audio device, and can be switched between the two as appropriate.

[others]
A head protection member 40 is stretched across a space in front of the sound generator to prevent the head of the occupant or passenger from coming into contact with the sound generator. The head protection member 40 is made of a mesh material and a wire fitting attached around the mesh material, and the shape of the mesh material is defined by the wire fitting. The mesh material is made of stretchable fabric with a large number of holes so as to be acoustically transparent, and has an arched shape at the front in accordance with the curvature of the front baffle plate 23. Thus, a space between the front baffle plate 23 and the front baffle plate 23 is secured. Further, the lower part of the head protection member 40 is connected to the backrest support member 12.

The skin material 11 mounted on the surface of the backrest 10 is not particularly limited, but a material with high sound transparency is used at least in the portion located in front of the sound generating device 27, that is, in the vicinity of the passenger's head. Therefore, it is possible to efficiently transmit the sound generated from the sound generator 27 to the passengers.

The procedure for installing the sound generator 27 on the upper part of the backrest frame 15 will be explained using the drawings from FIG. 3 onwards.
(1) In FIG. 3, the lower portions of the left and right vertical frame members 15A and 15B are connected by means such as welding with a first reinforcing member 16, and the intermediate height portions are connected by means such as welding with a second reinforcing member 17. Indicates a connected state. It is something. Further, a metal protective cover 19 is attached to the left and right vertical frame members 15A and 15B to cover the space between the left and right vertical frame members 15A and 15B to strengthen the left and right torsional rigidity. The protective cover 19 exists up to the height of the second reinforcing member 17 .
From this state, first, the lower ends of the upper predetermined ranges of the left and right vertical frame members 15A, 15B are connected by means such as welding with the lower lid body 26.

(2) As shown in FIGS. 4 and 5, the partition plate 22 is fixed to the left and right centers of the lower lid body 26 by means such as welding. Thereafter, the upper lid body 21 is fixed to the upper surfaces of the left and right vertical frame members 15A, 15B and the upper surface of the partition plate 22 by means such as welding.

(3) As shown in FIGS. 5 and 6, the area formed by the left and right side plates, the lower lid 26, the upper lid 21, and the partition plate 22 constitutes a predetermined upper range of the left and right vertical frame members 15A, 15B. A speaker box 20 is formed by attaching a front baffle plate 23 and a rear lid 24 to the front and rear of the speaker box 20, respectively. The front baffle plate 23 and the rear lid body 24 are fixed by means of adhesives, screws, or the like.

(4) As shown in FIGS. 7 and 8, the left and right vertical frame members 15A and 15B are provided with backrest support member fixing fittings 31A and 31B, headrest protection members 32A and 32B, and frame upper end protection member 33A (only one of the left and right (as shown) from the left and right respectively.
Further, the speakers 25 are attached to the plurality of openings formed in the front baffle plate 23, and wiring work and the like are performed so that sound can be output from the speaker box 20.

(7) As shown in FIGS. 9 and 10, fix the left and right head protection member mounting brackets 41A and 41B to the speaker box 20 from above.

(8) As shown in FIGS. 10 and 11, the head protection member 40 is stretched between the left and right head protection member mounting brackets 41A and 41B. This tensioning is performed by hooking one end of the coil spring 51 into the holes of the head protection members 41A and 41B, and hooking the other end of the coil spring 51 through the notch at the end of the head protection member 40 to surrounding wire fittings.

With the above steps, the installation of the sound generator 27 and the tensioning of the head protection member 40 are completed. Thereafter, as described above, the backrest support member 12 is stretched over the backrest support member fixing fittings 31A and 31B, and the skin material 11 is covered thereon, thereby making the backrest part ready for use.

[Example of change]
When the front baffle plate 23 and the rear lid body 24 are made of metal, their attachment may be changed from the above-mentioned adhesive or screw fastening to welding.

The backrest frame 15, the lower lid 26, the upper lid 21, the front baffle plate 23, and the rear lid 24 are not limited to being made of aluminum alloy, and may be made of steel or other metals, for example. Alternatively, the backrest frame 15, lower lid 26, and upper lid 21 may be made of steel or aluminum alloy, and the front baffle plate 23 and rear lid 24 may be made of aluminum alloy or resin. Since the main components that ensure the rigidity of the backrest frame 15 are the upper lid 21, the lower lid 26, and the partition plate 22, the front baffle plate 23 and the rear lid 24 may be made of lightweight resin.

1 Vehicle seat 2 Seat 3 Cushion 4 Seat frame 5 Cushion support member 6 Coil spring 10 Backrest 11 Outer skin material 12 Backrest support member 13 Coil spring 14 Coil spring 15 Backrest frame 15A Vertical frame member Right side (outside)
15B Vertical frame member left side (inside)
16 First reinforcing member 17 Second reinforcing member 19 Protective cover 20 Speaker box 21 Upper lid 22 Partition plate 23 Front baffle plate 24 Rear lid 25 Speaker 26 Lower lid 27 Sound generator 31A, 32B Backrest support member fixing fittings 32A, 32B Headrest protection member 33A Frame upper end protection member 40 Head protection member 41A, 41B Head protection member mounting bracket 51 Coil spring

Claims (11)

A sound generator consisting of a speaker attached to a speaker box is installed at the top of the backrest.
For vehicles, in which the backrest frame, which is the skeleton of the backrest, includes left and right vertical frame members extending in the vertical direction, and a plurality of reinforcing members extending in the left and right direction that connect and reinforce the left and right vertical frame members at a plurality of height locations. In the seat,
The speaker box has left and right side plates formed by upper predetermined ranges of the left and right vertical frame members, and left and right side plates that connect the left and right vertical frame members at lower ends of the upper predetermined ranges and function as one of the plurality of reinforcing members. a lower lid body extending in the direction; an upper lid body that connects the left and right vertical frame members at the upper ends of a predetermined upper region and functions as one of the plurality of reinforcing members; these side plate parts, the lower lid body, and the upper lid. A vehicle seat characterized by comprising a front baffle plate and a rear lid body respectively covering the front side and the rear side between the bodies. 2. The speaker box according to claim 1, wherein the speaker box includes a partition plate that connects the lower lid body and the upper lid body at a middle portion in the left-right direction to partition an internal space of the speaker box, and the partition plate increases the rigidity of the backrest frame. Vehicle seats. The plurality of reinforcing members include a first reinforcing member that connects the left and right vertical frame members at a lower portion, and a second reinforcing member that connects the left and right vertical frame members at an intermediate height portion lower than the lower lid body. Vehicle seat according to item 1 or 2. 2. The front baffle plate is curved so that the left and right parts protrude forward with respect to the middle part in the left-right direction, and a speaker is attached to at least the left part and the right part, respectively. Or the vehicle seat described in 3. 5. The vehicle seat according to claim 4, wherein one or two speakers aligned in the left-right direction are attached to an intermediate portion of the front baffle plate. The vehicle seat according to any one of claims 1 to 5, wherein the backrest frame, the lower lid, and the upper lid are made of aluminum alloy. The vehicle seat according to any one of claims 1 to 6, wherein the front baffle plate and the rear lid are made of aluminum alloy or resin. The vehicle seat according to any one of claims 1 to 7, wherein the sound generating device is a sound generating section of one or both of an active noise canceller and an audio device. The vehicle according to any one of claims 1 to 8, wherein a head protection member is stretched in front of the sound generator to prevent the head of the occupant or passenger from coming into contact with the sound generator. seat. 10. The vehicle seat according to claim 9, wherein the head protection member is made of a mesh material having sound transparency and elasticity. The vehicle seat according to any one of claims 1 to 10, wherein the skin member mounted on the surface of the backrest is made of a sound-transparent material in a portion located in front of the sound generating device. .

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