Vehicular seat

Abstract

To provide a vehicular seat which can protect a rear occupant on vehicle collision while suppressing an increase in manufacturing cost.SOLUTION: A seat back of a vehicular seat 1 comprises: a seat cover 12; interior members 14 to 17 stored inside the seat cover 12; and a buffer member 13 for countermeasures to an inner collision, arranged, on the rear side of the interior members 14 to 17, between the interior members 14 to 17 and the seat cover 12. The buffer member 13 consists of a single member made of a non-woven fabric constituted of thermoplastic chemical fibers and is so constituted that a Shore A hardness is 50 or more and a radius of curvature is 3.2 mm or more.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vehicle seat. [Background technology]

[0002] A vehicle seat includes a seat cushion and a seat back. The seat back includes a seat back frame, a seat back pad, and a seat cover. Interior components such as a coupler and a lumbar support are disposed on the rear side of the seat back pad in the seat back. Such interior components may have sharp corners.

[0003] Here, various efforts have been made for vehicle seats to protect occupants (especially the head and legs) in the event of a vehicle collision. For example, Patent Document 1 discloses a configuration having a protective protrusion arranged on the back side of a C-shaped ring for fixing a seat cover to a seat back pad. The protective protrusion is made of a foam material and is integrally formed with a felt layer attached to the back surface of the seat back pad.

[0004] Patent Document 2 also discloses a configuration having a cushioning member disposed between a seat back frame and a seat cover. The cushioning member is configured by bonding two layers, each of which is made of rubber or the like. Patent Document 2 also discloses that the hardness (Shore A hardness) of the cushioning member is set to 50 or more.

[0005] In the vehicle seats disclosed in Patent Documents 1 and 2, protective protrusions, cushioning members, and the like are disposed between the interior member and the seat cover to protect rear passengers in the event of a vehicle collision. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 3407008 [Patent Document 2] Patent No. 6565722 Summary of the Invention [Problem to be solved by the invention]

[0007] However, there is room for improvement in terms of reducing manufacturing costs in the vehicle seats disclosed in the above Patent Documents 1 and 2. Specifically, in the vehicle seats disclosed in the above Patent Documents 1 and 2, the cushioning members and the like are configured by combining multiple members, which is thought to lead to an increase in manufacturing costs.

[0008] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a vehicle seat that can protect rear passengers in the event of a vehicle collision while suppressing increases in manufacturing costs. [Means for solving the problem]

[0009] A vehicle seat according to one aspect of the present invention includes a seat cushion and a seat back. The seat back includes a seat cover constituting an exterior of the seat back, an interior member housed inside the seat cover, and a shock-absorbing member. The shock-absorbing member is a member for preventing an inward collision, which is disposed between the interior member and the seat cover on the vehicle rear side of the interior member.

[0010] In the vehicle seat according to the present embodiment, the cushioning member is a single member made of a nonwoven fabric made of thermoplastic chemical fibers, and is configured to have a Shore A hardness of 50 or more and a radius of curvature of 3.2 mm or more.

[0011] In the vehicle seat according to the above aspect, a cushioning member that is a single member made of nonwoven fabric is used, and therefore the number of manufacturing steps can be reduced compared to when a cushioning member made by joining multiple members is used, thereby enabling reduction in manufacturing costs.

[0012] In addition, in the vehicle seat according to the above embodiment, the cushioning member has a Shore A hardness of 50 or more and a curvature radius of 3.2 mm or more, so that the vehicle interior protrusion regulations, which state that "the portion where the head or leg model comes into contact and has a hardness of Shore A50 or more must have a radius of 2.5 or 3.2 mm or more," can be satisfied. That is, the "measures against inward collision" in the above means measures to satisfy the above-mentioned vehicle interior protrusion regulations. Therefore, the vehicle seat according to the above embodiment can protect rear passengers in the event of a vehicle collision while suppressing the increase in manufacturing costs as described above. In addition, in the vehicle seat according to the above embodiment, the "measures against inward collision" means measures to satisfy the "vehicle interior protrusion regulations."

[0013] Here, in the vehicle seat according to the above embodiment, the Shore A hardness of the cushioning member is set to 50 or more in order to prevent the cushioning member from being removed during a certification test. That is, in a certification test, soft members (members with a Shore A hardness of less than 50) are removed to prevent sinking during the test. For example, Annex 7 of No. 21 of the UN Regulation (Agreement Regulation) stipulates that "when determining whether or not a material is considered to be an internal protrusion, all materials with a Shore A hardness of less than 50 shall be removed." For this reason, in the vehicle seat according to the above embodiment, the Shore hardness of the cushioning member is set to 50 or more in order to prevent the cushioning member from being removed during a certification test.

[0014] In the vehicle seat relating to the above-mentioned aspect, when the cushioning member is viewed from one side in the fore-and-aft direction of the vehicle, the cushioning member may have a rectangular body portion and wing portions that are integrally formed with the body portion and are arranged so as to protrude in each of the left and right directions of the vehicle relative to the body portion.

[0015] In the vehicle seat according to the above aspect, the cushioning member has wing portions that protrude from the left and right sides of the torso portion. Therefore, the vehicle seat according to the above aspect can widely cover the edges of the seatback frame, various terminal devices, the lumbar mechanism, the corners of the coupler, etc. Therefore, the vehicle seat according to the above aspect can more reliably protect the rear passengers in the event of a vehicle collision.

[0016] In addition, in the vehicle seat according to the above embodiment, the body and the wing are integrally formed, so that a wide range of interior components can be covered without joining together a plurality of felt pieces as in the cushioning member according to the conventional technology. This is because in the vehicle seat according to the above embodiment, the cushioning member is formed by thermoforming using a nonwoven fabric made of thermoplastic chemical fibers. That is, since the nonwoven fabric made of thermoplastic chemical fibers is easily deformed, and can be molded into any shape by changing the shape of the mold, it is easy to mold the cushioning member. In the vehicle seat according to the above embodiment, the cushioning member is configured by focusing on the ease of processing of the nonwoven fabric made of such easily moldable thermoplastic chemical fibers.

[0017] In the vehicle seat relating to the above-mentioned aspect, the seat cover may further include a locking member fixed to the side of the cushioning member, and the cushioning member may have a through hole that penetrates in the fore-and-aft direction of the vehicle, through which a portion of the locking member is inserted to lock the locking member.

[0018] In the vehicle seat according to the above aspect, the cushioning member has a through hole into which the locking member is locked. Since the seat cover is fixed to the locking member, the seat cover can be attached to the cushioning member simply by locking the locking member to the through hole. Therefore, in the vehicle seat according to the above aspect, it is not necessary to fix the seat cover to the cushioning member by sewing or the like, which improves workability when manufacturing the vehicle seat and reduces manufacturing costs.

[0019] In the vehicle seat relating to the above-mentioned aspect, when the cushioning member is viewed from one side in the vehicle fore-and-aft direction, the cushioning member may have a high hardness portion provided in one part, and a low hardness portion having a lower hardness than the high hardness portion provided in a part other than the part where the high hardness portion is provided.

[0020] In the vehicle seat according to the above embodiment, since the cushioning member having a high hardness portion in the above-mentioned portion is adopted, it is possible to prevent the occurrence of scratches during manufacturing without attaching other members such as a reinforcing member. For example, the cushioning member may require the attachment of a member for fixing to the seat back frame, but if the portion where the member is to be attached is made a high hardness portion, it can be attached directly to the cushioning member without fixing a reinforcing member (for example, a resin plate) to the portion.

[0021] In addition, a crane may be used when transporting a vehicle seat, and in this case, the crane claw may hit a part of the vehicle seat, causing an indentation on the surface of the seat cover. However, in the vehicle seat according to the above embodiment, if the part where the crane claw hits is made a high hardness part, it is possible to prevent the indentation without using a separate reinforcing member. Note that the low hardness part may have a Shore A hardness that is 10% to 20% lower than the Shore A hardness of the high hardness part, for example. However, in the vehicle seat according to the above embodiment, the low hardness part also has a Shore A hardness of 50 or more.

[0022] In the vehicle seat according to the above aspect, the interior member may have a corner that is convex toward the rear of the vehicle, and the high hardness portion of the cushioning member may be disposed in a portion of the interior member on the vehicle rear side with respect to the corner.

[0023] In the vehicle seat according to the above aspect, the high hardness portion is arranged in the cushioning member at the portion covering the corner of the interior member, so that the occurrence of wrinkles on the surface of the seat cover due to the corner of the interior member can be suppressed. That is, in the vehicle seat according to the above aspect, by arranging the high hardness portion of the cushioning member between the seat cover and the interior member, the corner of the interior member that has moved rearward hits the high strength portion of the cushioning member, so that it is possible to prevent the seat cover and the interior member from hitting each other, and it is possible to effectively suppress the occurrence of wrinkles on the surface of the seat cover.

[0024] In the vehicle seat according to the above aspect, the low hardness portion of the cushioning member may be arranged in a portion configured with a curved surface such that the rear surface of the lower portion of the seat back in the vehicle vertical direction is configured with a curved surface.

[0025] In the vehicle seat according to the above aspect, the low hardness portion of the cushioning member is arranged in the lower portion (curved portion) of the seat back to be formed, so that the curvature of the cushioning member can be set so that the curved surface of the lower portion of the seat back can be formed. Therefore, the vehicle seat according to the above aspect achieves excellent appearance quality.

[0026] In the vehicle seat according to the above aspect, the cushioning member may be a member formed by molding one sheet of the nonwoven fabric using a thermoforming method.

[0027] In the vehicle seat according to the above aspect, the cushioning member is formed using a thermoforming method, so that various shapes can be realized from a single member, and the hardness of each location can be controlled with high precision by changing the heating temperature. Effect of the Invention

[0028] The vehicle seat according to each of the above aspects can protect rear passengers in the event of a vehicle collision while suppressing increases in manufacturing costs. [Brief description of the drawings]

[0029] [Figure 1]It is a developed perspective view showing the configuration of a vehicle seat according to the first embodiment of the present invention. [Diagram 2] It is a plan view showing the configuration of a buffer member. [Diagram 3] It is a plan view showing the configuration of a buffer member provided in a vehicle seat according to a comparative example. [Figure 4] It is a plan view showing the configuration of a buffer member and a seat cover provided in a vehicle seat according to the second embodiment of the present invention. [Diagram 5] It is a top view showing the configuration of a locking component. [Figure 6] It is a plan view showing the configuration of a buffer member provided in a vehicle seat according to the third embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are illustrative of the present invention, and the present invention is not limited to the following embodiments except for its essential configuration.

[0031] In the drawings used in the following description, the front in the vehicle front-rear direction is indicated as "FR", the rear as "RR", the left in the vehicle left-right direction as "LH", the right as "RH", the upper in the vehicle up-down direction as "UP", and the lower as "LO", respectively.

[0032] [First Embodiment] 1. Configuration of Vehicle Seat 1 The configuration of the vehicle seat 1 according to the first embodiment of the present invention will be described with reference to FIG. 1. In this embodiment, a vehicle seat 1 for a front seat placed in the front part of the vehicle cabin is adopted as an example. Also, in FIG. 1, only the seat back among the configurations of the vehicle seat 1 is illustrated, and the illustration of the seat cushion is omitted.

[0033] 1, the seat back of the vehicle seat 1 includes a seat back frame 10, a seat back pad 11, a seat cover 12, and a cushioning member 13. The seat back of the vehicle seat 1 also includes various interior members 14 to 17 disposed on a back surface portion 10a of the seat back frame 10, and an airbag 18 disposed on a side surface portion 10b of the seat back frame 10.

[0034] The seat back pad 11 is disposed so as to cover the front surface portion 10c, the side surface portion 10b, and the top surface portion 10d of the seat back frame 10.

[0035] The seat cover 12 is arranged to cover the seat back frame 10, the seat back pad 11, the cushioning member 13, various interior members 14 to 17, and the airbag .

[0036] The interior member designated by reference numeral 14 is a ventilation device, the interior member designated by reference numeral 15 is a lumbar support, the interior member designated by reference numeral 16 is a lumbar motor, and the interior member designated by reference numeral 17 is a wire harness. Of these, the ventilation device 14, the lumbar support 15, and the lumbar motor 16 each have a convex corner facing the rear side of the vehicle.

[0037] The cushioning member 13 is a single member made of nonwoven fabric made of plastic chemical fibers, and has a generally flat plate shape. The detailed configuration of the cushioning member 13 will be described later.

[0038] A fixing member 19 is joined to the lower part of the cushioning member 13. The fixing member 19 is a member for fixing the cushioning member 13 to a seat cushion frame (not shown), and is formed of a rubber band, for example.

[0039] 2. Configuration of the cushioning member 13 The configuration of the cushioning member 13 will be described with reference to Fig. 2 and Fig. 3. Fig. 3 is a diagram showing the configuration of a cushioning member 93 in a vehicle seat according to a comparative example. The cushioning member 93 of the comparative example is made of felt.

[0040] 2, the cushioning member 13 has a rounded rectangular shape in a plan view from the vehicle front-rear direction (a direction perpendicular to the paper surface of FIG. 2). The cushioning member 13 has a recessed portion 13c in a lower portion. The recessed portion 13c is provided to avoid interference with a footlight arranged in the lower portion of the vehicle seat 1.

[0041] The cushioning member 13 is integrally formed with a body 13a having a rounded rectangular shape in a plan view, wing portions 13b protruding from the left and right sides of the body 13a, and legs 13d extending downward from the lower part of the body 13a on both the left and right sides of the recessed portion 13c.

[0042] As described above, the fixing members 19 are joined to the left and right leg portions 13d. The fixing members 19 are joined to the leg portions 13d at the portions indicated by arrows A by sewing.

[0043] The lower part of the body 13a and the leg parts 13d of the cushioning member 13 are configured as high hardness parts 13e having a higher hardness than the other parts. In other words, the upper part of the body 13a and the wing parts 13b are formed as low hardness parts having a lower hardness than the other parts.

[0044] Here, the cushioning member 13 of this embodiment is a member that is integrally formed using a nonwoven fabric composed of thermoplastic chemical fibers, and is configured to have a Shore A hardness of 50 or more and a radius of curvature of 3.2 mm or more.

[0045] On the other hand, as shown in FIG. 3, the cushioning member 93 of the comparative example is configured by sewing a main body member 930 made of felt and a wing member 931 also made of felt together at a sewing portion Ls.

[0046] In addition, the buffer member 93 of the comparative example also includes a hard felt member 932 and a PP (polypropylene) plate 933 joined to the main body member 930. The hard felt member 932 is a member made of felt harder than the felt constituting the main body member 930, and is arranged at a portion covering the corner of the interior member. Thereby, it suppresses the occurrence of wrinkles on the surface of the seat cover due to the corners of the interior member during a vehicle collision.

[0047] The PP plate 933 is arranged at a portion where the crane claw hits when transporting the vehicle seat provided with the buffer member 93. That is, the PP plate 933 suppresses the occurrence of indentations caused by the crane claw inserted between the seat back and the seat cushion during the transportation of the vehicle seat.

[0048] Furthermore, in the buffer member 93 of the comparative example, a PP plate 934 is also fixed to the leg portion. The PP plate 934 is provided for attaching a fixing member such as a rubber band.

[0049] As described above, the buffer member 93 of the comparative example is configured by combining a plurality of members 930 to 934. Therefore, in order to manufacture the buffer member 93 of the comparative example, it is necessary to prepare a plurality of parts and perform complicated processes such as sewing to join the plurality of parts together. Thus, in the comparative example, it causes an increase in manufacturing cost.

[0050] On the other hand, in the buffer member 13 of the present embodiment, since the wing portion 13b and the high hardness portion 13e are formed integrally with the body portion 13a as a single member, it is possible to suppress an increase in manufacturing cost as in the buffer member 93 of the comparative example shown in FIG. 3.

[0051] In addition, in the buffer member 13, since the portion where the PP plate 933 was joined as a countermeasure against indentations in the buffer member 93 of the comparative example is used as the high hardness portion 13e, there is no need to join separate parts, and while reducing the manufacturing cost, the occurrence of indentations can be suppressed and high appearance quality can be realized.

[0052] Furthermore, in the cushioning member 13 of this embodiment, the fixing member 19 is directly joined to the leg portion 13d without joining the PP plate 934 as in the cushioning member 93 of the comparative example, which also makes it possible to reduce the manufacturing cost.

[0053] 3. Method of forming the cushioning member 13 The cushioning member 13 employed in the vehicle seat 1 of this embodiment is integrally formed using a nonwoven fabric made of thermoplastic chemical fibers. As the nonwoven fabric made of thermoplastic chemical fibers, for example, a spunbond nonwoven fabric made of polyester-based continuous fibers, in which continuous fibers are entangled with each other, is preferable.

[0054] Here, the high hardness portion 13e and the other portions of the cushioning member 13 can be made differently by controlling the heating temperature during manufacturing.

[0055] Specifically, the parts heated to a higher temperature during thermoforming have a higher hardness after cooling, and the parts heated to a lower temperature have a lower hardness after cooling. Thus, the parts where high hardness parts 13e (see FIG. 2) are to be formed are heated at a higher temperature, and the other parts are heated at a lower temperature. In this way, the hardness can be controlled for each part by controlling the heating temperature during heating.

[0056] In addition, since the leg portion 13d is also formed to have a high hardness, it is possible to join the fixing member (such as a rubber band) 19 directly by sewing it, without joining the PP plate 934 as in the comparative example shown in FIG.

[0057] 4.Effects The vehicle seat 1 according to this embodiment employs the cushioning member 13, which is a single member made of nonwoven fabric. This makes it possible to reduce the number of manufacturing steps and therefore the manufacturing costs, compared to the case in which the cushioning member 93 made by joining multiple members as in the comparative example shown in FIG. 3 is employed.

[0058] In addition, the vehicle seat 1 has a Shore A hardness of 50 or more and a radius of curvature of 3.2 mm or more, which satisfies the regulations for protrusions in vehicle interiors, which state that "points where the head or leg model comes into contact and have a hardness of Shore A 50 or more must have a radius of 2.5 or 3.2 mm or more." Therefore, the vehicle seat 1 can protect rear passengers in the event of a vehicle collision while suppressing increases in manufacturing costs.

[0059] Furthermore, in the vehicle seat 1 according to this embodiment, the cushioning member 13 has wing portions 13b that bulge out on the left and right sides of the trunk portion 13a. Therefore, the vehicle seat 1 can widely cover the edge of the seatback frame 10 and various interior members 14 to 17. Therefore, the vehicle seat 1 can more reliably protect rear passengers in the event of a vehicle collision.

[0060] In addition, in the vehicle seat 1 according to this embodiment, the trunk portion 13a, the wing portions 13b, and the leg portions 13d are integrally formed, so that it is possible to cover a wide range of the interior members 14 to 17 without joining together a plurality of felt pieces (members 930, 931, 932) as in the cushioning member 93 of the comparative example shown in FIG. 3. This is because in the vehicle seat 1, the cushioning member 13 is formed using a nonwoven fabric made of thermoplastic chemical fibers. By using the nonwoven fabric made of thermoplastic chemical fibers, it is easy to mold the cushioning member 13 into any shape. In the vehicle seat 1, the cushioning member 13 is configured by focusing on the ease of processing (ease of controlling hardness) of the nonwoven fabric made of such easily moldable thermoplastic chemical fibers.

[0061] In the vehicle seat 1 according to this embodiment, the high hardness portion 13e is formed in the portion from the torso portion 13a to the leg portion 13d, and the other portions are formed with a low hardness. By adopting the cushioning member 13 having the high hardness portion 13e in a portion thereof, it is possible to attach other members without providing a separate reinforcing member (PP plates 933, 934) as in the comparative example of FIG. 3, and it is possible to prevent the occurrence of scratches and the like during manufacturing.

[0062] Furthermore, in the vehicle seat 1 according to this embodiment, the high hardness portions 13e of the cushioning member 13 are provided so as to be located in places covering the corners of the interior members 14-17, so that it is possible to prevent wrinkles from occurring on the surface of the seat cover 12 due to the corners of the interior members 14-17 during a vehicle collision.

[0063] Furthermore, in the vehicle seat 1 according to this embodiment, the cushioning member 13 is formed using a thermoforming method, so that various shapes can be realized with a single member, and the hardness of each location can be controlled with high precision by changing the heating temperature.

[0064] As described above, the vehicle seat 1 according to this embodiment can protect rear passengers in the event of a vehicle collision while suppressing increases in manufacturing costs.

[0065] [Second embodiment] A vehicle seat according to a second embodiment of the present invention will be described with reference to FIGS.

[0066] The vehicle seat according to this embodiment is characterized by the configuration of the cushioning member 23 and the manner in which the seat cover 12 is attached to the cushioning member 23. Therefore, only these characteristic parts will be described below, and the description of the other parts will be omitted. The parts whose description will be omitted have the same configuration as the first embodiment.

[0067] 4, the cushioning member 23 of this embodiment has two through holes (slits) 23a. The two slits 23a are provided in the body portion and are spaced apart from each other in the left-right direction of the vehicle.

[0068] A locking member 24 is attached to the seat cover 12 at a portion corresponding to the two slits 23a on the inner surface facing the cushioning member 23. In this embodiment, a member formed by processing a PP plate is used as the locking member 24.

[0069] 5, the locking member 24 is integrally formed with a main body plate portion 24a extending in the left-right direction, arm plate portions 24b protruding forward from each end of the main body plate portion 24a, and locking claws 24c provided at the tip portion of each arm plate portion 24b. The locking claws 24c are formed on the inside in the left-right direction of each arm plate portion 24b.

[0070] The seat cover 12 can be attached to the cushioning member 23 in the following order. (i) The engaging member 24 is attached to a predetermined location of the seat cover 12 by sewing. (ii) The seat cover 12 is placed over the cushioning member 23. (iii) The arm plate portion 24b of the locking member 24 is inserted into the slit 23a of the buffer member 23 and locked by the locking claw 24c.

[0071] The vehicle seat according to this embodiment includes the cushioning member 23 and the locking member 24 having the above-described configuration, and the seat cover 12 is attached to the cushioning member 23 in the above-described manner.

[0072] The vehicle seat according to this embodiment can obtain the same effects as those of the first embodiment. In addition, in the vehicle seat according to this embodiment, the cushioning member 23 has a slit 23a used for engagement with the locking member 24. Since the seat cover 12 is fixed to the locking member 24, the seat cover 12 can be attached to the cushioning member 23 simply by locking the arm plate portion 24b of the locking member 24 to the slit 23a. Therefore, in the vehicle seat according to this embodiment, it is not necessary to fix the seat cover 12 to the cushioning member 23 by sewing or the like, and the workability in manufacturing the vehicle seat can be improved, and the manufacturing cost can be reduced.

[0073] [Third embodiment] A vehicle seat according to a third embodiment of the present invention will be described with reference to Fig. 6. In Fig. 6, only the cushioning member 33 of the configuration of the vehicle seat according to this embodiment is illustrated.

[0074] In the vehicle seat according to this embodiment, the locations where the high hardness portion 33b and the low hardness portion 33c are formed in the cushioning member 33 are different from those in the first embodiment. Therefore, only these different parts will be described below, and the description of the other parts will be omitted. The same configuration as in the first embodiment is adopted for the parts whose description is omitted.

[0075] 6, the cushioning member 33 of this embodiment has two high hardness parts 33b and one low hardness part 33c in a body part 33a. The cushioning member 33 of this embodiment is also molded using a thermoforming method, and the high hardness part 33b and the low hardness part 33c are provided by controlling the heating temperature.

[0076] When the portion of the body 33a excluding the high hardness portion 33b and the low hardness portion 33c is taken as a reference, the high hardness portion 33b is formed to have a Shore A hardness of 50 or more, and the low hardness portion 33c is formed to have a Shore A hardness that is 10% to 20% lower than that of the high hardness portion 33b. In this embodiment, the low hardness portion 33c is also formed to have a Shore A hardness of 50 or more.

[0077] The high hardness portion 33b in the body portion 33a of the cushioning member 33 is formed at a position that covers the edge portion of the seat back frame 10 and the rear of the coupler, which is an interior member.

[0078] The low hardness portion 33c in the body portion 33a of the cushioning member 33 is formed at a position that covers the rear of the curved portion of the lower part of the seat back.

[0079] The vehicle seat according to this embodiment can obtain the same effects as those of the above-described embodiment 1. In addition, in the vehicle seat according to this embodiment, the high hardness portion 33b is provided in the portion covering the rear of the edge portion of the seatback frame 10, thereby making it possible to protect the rear passengers in the event of a vehicle collision.

[0080] Furthermore, in the vehicle seat according to this embodiment, the low hardness portion 33c of the cushioning member 33 is arranged in the curved portion at the lower part of the seat back, so that the cushioning member 33 can be made to conform to the curvature of the curved portion of the seat back, thereby achieving excellent appearance quality.

[0081] [Variations] In the first to third embodiments, the cushioning members 13, 23, and 33 have the wing portions 13b, but the wing portions are not essential to the present invention. Even in this case, by increasing the size of the trunk portion in the left-right direction, even if an edge portion exists in the seat back frame, the edge portion can be covered by the trunk portion.

[0082] In the second embodiment, the buffer member 23 is provided with a linear slit 23a in plan view as an example of a through hole, but the present invention is not limited to the shape of the through hole in plan view. For example, it is also possible to provide a through hole that is circular or elliptical in plan view. In this case, the same effect as the second embodiment can be obtained by making the cross-sectional shape of the arm plate portion of the locking member match the through hole.

[0083] In the third embodiment, the high hardness portion 33b is provided in the middle of the height direction of the body portion 33a of the cushioning member 33, and the low hardness portion 33c is provided in the lower portion, but the present invention is not limited to the locations where the high hardness portion and the low hardness portion are provided. The high hardness portion and the low hardness portion can be provided appropriately according to the arrangement of the interior members and the structure of the seat back.

[0084] In addition, in the above third embodiment, a low hardness portion 33c is provided in the body portion 33a of the cushioning member 33 so that it fits the curved portion of the seat back. However, instead of providing the low hardness portion 33c, it is also possible to give curvature to the required portion when molding the cushioning member by thermoforming.

[0085] In the first to third embodiments, the cushioning members 13, 23, and 33 are generally flat, but the present invention is not limited to the shape of the cushioning members. As long as there is no portion with a radius of curvature of less than 3.2 mm, it is also possible to use cushioning members with convex or concave curved surfaces or cushioning members with a wave shape.

[0086] In the first to third embodiments, a vehicle seat for a front seat is used as the vehicle seat 1, but the present invention is not limited to this. For example, the configuration of the present invention can be applied to a second row seat in a three-row seat.

[0087] In the first to third embodiments, the cushioning members 13, 23, 33 are used that have a substantially uniform thickness dimension in the vehicle front-rear direction, but the present invention is not limited to this. For example, the thickness may be made thicker in the portion covering the rear of the interior material or the edge portion of the seat back frame, and the thickness of the other portion may be made thinner. This allows for weight reduction and reduction in manufacturing costs compared to a case where the entire thickness is made thicker. [Explanation of symbols]

[0088] 1 Vehicle seat 10 Seat back frame 12 Seat Covers 13, 23, 33 Cushioning material 13b wing section 13e,33b High hardness part 14 Ventilation equipment (interior parts) 15 Lumbar support (interior parts) 16 Lumber motor (interior parts) 19 Fixing member 23a Slit 24 Locking member 33c Low hardness part

Claims

1. A vehicle seat including a seat cushion and a seat back, The seat back is A seat cover that constitutes an exterior of the seat back; An interior member accommodated inside the seat cover; a shock absorbing member for preventing an internal collision, the shock absorbing member being disposed between the interior member and the seat cover at a position rearward of the interior member; Equipped with The cushioning member is made of a single member made of nonwoven fabric composed of thermoplastic chemical fibers, and is configured to have a Shore A hardness of 50 or more and a radius of curvature of 3.2 mm or more. Vehicle seat.

2. When the buffer member is viewed from one side in the vehicle front-rear direction, the buffer member is A rectangular body portion; Wing portions formed integrally with the body portion and provided so as to protrude in each of the left and right directions of the vehicle relative to the body portion; having The vehicle seat according to claim 1 .

3. The seat cover further includes a locking member fixed to a side of the cushioning member, The buffer member has a through hole penetrating in the vehicle front-rear direction, and a part of the locking member is inserted through the through hole to lock the locking member. The vehicle seat according to claim 1 .

4. When the cushioning member is viewed from one side in the vehicle front-rear direction, the cushioning member has a high hardness portion provided in a part of the cushioning member, and a low hardness portion that is provided in a part other than the part where the high hardness portion is provided and has a hardness lower than that of the high hardness portion. The vehicle seat according to claim 1 .

5. The interior member has a corner portion that is convex toward the rear of the vehicle, The high hardness portion of the cushioning member is disposed in a portion of the interior member on the vehicle rear side with respect to the corner portion. The vehicle seat according to claim 4.

6. The low hardness portion of the cushioning member is disposed in a portion configured with a curved surface such that a rear surface of the lower portion of the seat back in the vehicle vertical direction is configured with the curved surface. The vehicle seat according to claim 4.

7. The cushioning member is a member formed by molding one sheet of the nonwoven fabric using a thermoforming method. The vehicle seat according to any one of claims 1 to 6.

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