Vehicle seats

Abstract

To provide a vehicle seat capable of suppressing vibration of an arm rest.SOLUTION: A vehicle seat includes a seat cushion, an arm rest, and a cushion frame supporting the seat cushion. The arm rest has an arm holding part constituting the upper surface of the arm rest, and an arm rest frame arranged below the arm holding part. The arm rest frame has a first frame which extends in a vertical direction, and is connected to the cushion frame. The first frame has a first side wall and a second side wall which extend in a vertical direction and are opposite to each other in a seat width direction, and a plurality of reinforcement plates for connecting the first side wall and the second side wall in the seat width direction. The thickness direction of the plurality of reinforcement plates cross each other in a seat longitudinal direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to vehicle seats. [Background technology]

[0002] A vehicle seat having an armrest provided on the side of a seat cushion is known (see Patent Document 1). The armrest has an armrest frame connected to a cushion frame in a cantilevered manner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] China Utility Model Publication No. 212313363 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described cantilevered armrest frame, the upper end of the armrest frame is displaced significantly by vehicle vibrations transmitted from the cushion frame, which increases vibrations at the parts of the armrest that are in contact with the hands of the seated occupant.

[0005] An object of one aspect of the present disclosure is to provide a vehicle seat that can suppress vibration of an armrest. [Means for solving the problem]

[0006] One aspect of the present disclosure is a vehicle seat (1) including a seat cushion (2), a seat back (3), an armrest (5), and a cushion frame (6) that supports the seat cushion (2). The armrest (5) has an arm holder (51) that forms the upper surface of the armrest (5), and an armrest frame (52) that is disposed below the arm holder (51).

[0007] The armrest frame 52 has a first frame 521 extending in the vertical direction and connected to the cushion frame 6. The first frame 521 has a first side wall 53 and a second side wall 54 extending in the vertical direction and facing each other in the seat width direction, and a plurality of reinforcing plates 55 connecting the first side wall 53 and the second side wall 54 in the seat width direction. The thickness direction of the plurality of reinforcing plates 55 intersects with the seat front-rear direction.

[0008] According to this configuration, the stiffness of the first frame (521) extending in the vertical direction in the seat width direction is increased by the plurality of reinforcing plates (55), which makes it possible to reduce the weight of the armrest frame (52) and suppress vibration of the armrest (5).

[0009] In one aspect of the present disclosure, the multiple reinforcing plates 55 may form a truss structure together with the first side wall 53 and the second side wall 54. This configuration can enhance the effect of improving the rigidity of the first frame 521 in the seat width direction.

[0010] In one aspect of the present disclosure, the armrest frame (52) may have a second frame (522) that extends in the vertical direction and is connected to the cushion frame (6) behind the first frame (521). The rigidity of the first frame (521) against vibration in the seat width direction may be greater than the rigidity of the second frame (522) against vibration in the seat width direction. With this configuration, the displacement due to vibration of the first frame (521) located in front of the seat is smaller than that of the second frame (522) located behind the seat, thereby suppressing vibration of the front portion of the arm holding portion (51) that is touched by the hands of a seated occupant.

[0011] In one aspect of the present disclosure, the first frame (521) may be connected to the cushion frame (6) at a connecting portion (521A) and an auxiliary connecting portion (521B) provided above the connecting portion (521A). With this configuration, the first frame (521) is fixed to the cushion frame (6) at two points, upper and lower, and therefore the rigidity of the first frame (521) against vibration can be increased with a relatively simple structure.

[0012] Note that the symbols in the parentheses above are examples showing the correspondence with the specific configurations, etc. described in the embodiments described below, and the present disclosure is not limited to the specific configurations, etc. shown by the symbols in the parentheses above. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a schematic perspective view showing a vehicle seat according to an embodiment. [Figure 2] FIG. 2 is a schematic perspective view of the cushion frame and the armrest frame of FIG. [Figure 3] FIG. 3 is a schematic perspective view of the cushion frame and the armrest frame of FIG. [Figure 4] FIG. 4 is a schematic side view of the second armrest of FIG. [Figure 5] 5A, 5B, 5C and 5D are schematic front views of the first reinforcing portion of the first armrest of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings. [1. First embodiment] [1-1.Configuration] The vehicle seat 1 shown in FIG. 1 includes a seat cushion 2, a seat back 3, a first armrest 4, a second armrest 5, a cushion frame 6, and a back frame 7.

[0015] The vehicle seat 1 is used as a seat for a passenger vehicle. Note that the directions in the following description and in each drawing refer to directions when the vehicle seat 1 is assembled to the vehicle (i.e., the passenger vehicle). In this embodiment, the width direction of the seat coincides with the left-right direction of the vehicle, and the front of the seat coincides with the front of the vehicle.

[0016] The seat cushion 2 is a part for supporting the buttocks of a seated person. The seat back 3 is a part for supporting the back of the seated person. The first armrest 4 is a part for supporting the right arm of the seated person. The second armrest 5 is a part for supporting the left arm of the seated person. The cushion frame 6 supports the seat cushion 2. The back frame 7 supports the seat back 3.

[0017] <Cushion frame> As shown in FIG. 2, the cushion frame 6 has a first side frame 61, a second side frame 62, a front frame 63, a rear frame 64, a first connecting bracket 65, a second connecting bracket 66, a third connecting bracket 67, a fourth connecting bracket 68, and a fifth connecting bracket 69.

[0018] The first side frame 61 and the second side frame 62 each extend in the front-rear direction of the seat and are spaced apart from each other in the width direction of the seat. The first side frame 61 is located on the left side of the second side frame 62. The first side frame 61 and the second side frame 62 are each configured to be fixed to the floor of the vehicle on which the vehicle seat 1 is installed.

[0019] The front frame 63 is a cylindrical member extending in the seat width direction, and connects the front end portions of the first side frame 61 and the second side frame 62 in the seat width direction.

[0020] The rear frame 64 is a cylindrical member extending in the seat width direction. The rear frame 64 connects the first side frame 61 and the second side frame 62 in the seat width direction behind the front frame 63.

[0021] The first connecting bracket 65 is a plate member that is fixed, for example by welding, to the outer circumferential surface of the front frame 63 on the outer side in the seat width direction (i.e., on the left side) of the first side frame 61. The first connecting bracket 65 extends upward from the front frame 63.

[0022] The second connecting bracket 66 is a plate member that is fixed, for example by welding, to the outer peripheral surface of the rear frame 64 on the outer side in the seat width direction (i.e., on the left side) of the first side frame 61. The second connecting bracket 66 extends upward from the rear frame 64.

[0023] The third connecting bracket 67 is a plate member fixed, for example, by welding, to the outer surface of the second side frame 62 in the seat width direction. The third connecting bracket 67 is disposed below the front frame 63.

[0024] The fourth connecting bracket 68 is disposed so as to overlap from above the front end portion of the second side frame 62. The fourth connecting bracket 68 is a plate material fixed, for example, by welding, to the outer peripheral surface of the front frame 63. The fourth connecting bracket 68 protrudes outward in the seat width direction (i.e., to the right) beyond the second side frame 62.

[0025] The fifth connecting bracket 69 is a plate member fixed, for example by welding, to the outer surface in the seat width direction of the second side frame 62. The fifth connecting bracket 69 is arranged further rearward of the fourth connecting bracket 68 in the seat.

[0026] <First armrest> As shown in FIG. 1, the first armrest 4 has an arm holding portion 41 and an armrest frame .

[0027] The arm holding portion 41 extends in the front-to-rear direction of the seat and forms the upper surface (i.e., the surface on which the arm is placed) of the first armrest 4. The arm holding portion 41 is located above the seat cushion 2 and supports the left arm of the seated occupant from below. The arm holding portion 41 has an elastic pad and a leather cover that covers the pad.

[0028] The armrest frame 42 is disposed below the arm holding portion 41 and supports the arm holding portion 41 from below. The armrest frame 42 is made of a metal such as iron, aluminum, or magnesium. As shown in FIG. 2 , the armrest frame 42 is connected to the cushion frame 6 by a first connecting bracket 65 and a second connecting bracket 66.

[0029] <Second armrest> As shown in FIG. 1, the second armrest 5 has an arm holding portion 51 and an armrest frame 52.

[0030] (Arm holding part) The arm holding portion 51 extends in the front-rear direction of the seat and forms the upper surface of the second armrest 5.

[0031] The arm holding portion 51 supports the right arm of the seated occupant from below, above the seat cushion 2. The arm holding portion 51 has an elastic pad and a leather cover that covers the pad.

[0032] (Armrest frame) The armrest frame 52 is disposed below the arm holding portion 51 and supports the arm holding portion 51 from below.

[0033] The armrest frame 52 is made of a metal such as iron, aluminum, magnesium, etc. As shown in FIG.

[0034] The first frame 521 is a member extending in the up-down direction. The lower end of the first frame 521 is located further rearward in the seat than the upper end of the first frame 521. The first frame 521 is disposed further outward in the seat width direction than the second side frame 62 of the cushion frame 6. The first frame 521 is supported by the cushion frame 6 at two locations: a first connecting portion 521A and an auxiliary connecting portion 521B.

[0035] Specifically, the first frame 521 is fixed at the first connecting portion 521A to the third connecting bracket 67 of the cushion frame 6 by a bolt and a nut. The fastening direction of the bolt and the nut at the first connecting portion 521A is perpendicular to the seat front-rear direction.

[0036] The first frame 521 is fixed at the auxiliary connecting portion 521B to the fourth connecting bracket 68 of the cushion frame 6 with a bolt and a nut. The fastening direction of the bolt and nut at the auxiliary connecting portion 521B is perpendicular to the seat front-rear direction.

[0037] Auxiliary connecting portion 521B is located higher than first connecting portion 521A and in front of the seat. In addition, auxiliary connecting portion 521B is located closer to the lower end of first frame 521 than to the upper end in the longitudinal direction of first frame 521.

[0038] 4, first frame 521 has first reinforcing portion 521D provided in a portion of the longitudinal direction. First reinforcing portion 521D is disposed above first connecting portion 521A of first frame 521 and below first frame connecting portion 521C (i.e., third frame 523).

[0039] Auxiliary connecting portion 521B is provided on first reinforcing portion 521D. Furthermore, of first frame 521, a portion below first reinforcing portion 521D and a portion above first reinforcing portion 521D are each made of a rectangular tubular member.

[0040] 5A, the first reinforcing portion 521D has a first side wall 53, a second side wall 54, and multiple reinforcing plates 55. The first side wall 53 and the second side wall 54 are plate members that extend in the up-down direction and face each other in the seat width direction. The first side wall 53 is disposed outward (i.e., to the right) of the second side wall 54 in the seat width direction.

[0041] The outer and inner surfaces of the first side wall 53 and the second side wall 54 are parallel to the seat front-rear direction. The outer surface of the first side wall 53 (i.e., the surface opposite the second side wall 54) forms the outer side surface of the first reinforcing portion 521D in the seat width direction. The outer surface of the second side wall 54 (i.e., the surface opposite the first side wall 53) forms the inner side surface of the first reinforcing portion 521D in the seat width direction.

[0042] The plurality of reinforcing plates 55 connect the first side wall 53 and the second side wall 54 in the seat width direction. The reinforcing plates 55 are flat plates that are not curved or bent.

[0043] The plate surface of the reinforcing plate 55 is parallel to the front-rear direction of the seat. That is, the thickness direction of the reinforcing plate 55 intersects (specifically, is perpendicular to) the front-rear direction of the seat. The thickness of the reinforcing plate 55 is smaller than the thicknesses of the first side wall 53 and the second side wall 54.

[0044] 5A and 5B, the ends in the sheet width direction of adjacent reinforcing plates 55 are connected to each other. In this case, one end of one reinforcing plate 55 is simultaneously connected to one end of the adjacent reinforcing plate 55 above and to one of the first side wall 53 and the second side wall 54.

[0045] 5A and 5B has a truss structure in which three plates are connected at one location. That is, the multiple reinforcing plates 55, together with the first side wall 53 and the second side wall 54, form a truss structure.

[0046] The first reinforcing portion 521D having a truss structure has a plurality of triangular prism-shaped spaces formed in the extending direction of the first frame 521. The axial direction of the triangular prism-shaped spaces is parallel to the front-rear direction of the seat.

[0047] 5B, reinforcing plates 55 are connected to the upper end E of the curved portion of the second side wall 54 and to the vertex C of the curved portion (i.e., the portion with the smallest radius of curvature), respectively. This distributes stress at the vertex C, improving the strength of the first reinforcing portion 521D.

[0048] 5C and 5D has a rigid frame structure in which a plurality of reinforcing plates 55 are arranged apart from one another along the extension direction of the first frame 521. That is, the plurality of reinforcing plates 55, together with the first side wall 53 and the second side wall 54, form a rigid frame structure.

[0049] The first reinforcing portion 521D having a rigid frame structure has a plurality of square pillar-shaped spaces formed in the extending direction of the first frame 521. The axial direction of the square pillar-shaped spaces is parallel to the front-rear direction of the seat.

[0050] 5C, the spacing between the multiple reinforcing plates 55 in the vertical direction may be greater than the width of the first reinforcing portion 521D (i.e., the distance between the outer surface of the first side wall 53 and the outer surface of the second side wall 54). Also, as shown in Fig. 5D, the spacing between the multiple reinforcing plates 55 in the vertical direction may be smaller than the width of the first reinforcing portion 521D.

[0051] The first reinforcing portion 521D may have a truss structure as a whole, or only a part of it may have a truss structure. The first reinforcing portion 521D may have a composite structure that combines a truss structure and a rigid frame structure.

[0052] When the first reinforcing portion 521D is made of aluminum, it can be formed by extrusion molding, for example. This allows a truss structure, rigid frame structure, or other shape with high rigidity in the seat width direction to be formed using a thin plate. Furthermore, cutting the extruded, long molded product to a predetermined size improves the quality stability and productivity of the first frame 521.

[0053] The second frame 522 shown in Fig. 3 is a member extending in the vertical direction. The lower end of the second frame 522 is located further forward in the seat than the upper end of the second frame 522. The second frame 522 is disposed further outward in the seat width direction than the second side frame 62 of the cushion frame 6. The second frame 522 is connected to the cushion frame 6 at a second connecting portion 522A.

[0054] The second connecting portion 522A is located rearward of the seat relative to the first frame 521. Specifically, the second frame 522 is fixed to the fifth connecting bracket 69 of the cushion frame 6 at the second connecting portion 522A with a bolt and a nut.

[0055] The direction in which the second connecting portion 522A is fastened by the bolt and nut is perpendicular to the seat front-rear direction. The second frame 522 is supported by the cushion frame 6 only at the second connecting portion 522A.

[0056] 4, first connecting portion 521A of first frame 521 is positioned lower than second connecting portion 522A of second frame 522. In addition, auxiliary connecting portion 521B of first frame 521 is positioned higher than second connecting portion 522A of second frame 522.

[0057] The second frame 522 has a second reinforcing portion 522D provided in a portion of the longitudinal direction. The second reinforcing portion 522D is disposed below the second frame connecting portion 522B (i.e., the third frame 523) and includes the lower end portion of the second frame 522.

[0058] The second connecting portion 522A is provided on the second reinforcing portion 522D. Furthermore, the portion of the second frame 522 above the second reinforcing portion 522D is made up of a rectangular cylindrical member.

[0059] The second reinforcing portion 522D has the same configuration as the first reinforcing portion 521D. That is, the second reinforcing portion 522D has a first side wall 53, a second side wall 54, and a plurality of reinforcing plates 55 shown in Figures 5A to 5D. Like the first reinforcing portion 521D, the second reinforcing portion 522D is configured with any one of a truss structure, a rigid frame structure, or a composite structure of a truss structure and a rigid frame structure.

[0060] The rigidity of the first frame 521 against vibration in the seat width direction is greater than the rigidity of the second frame 522 in the seat width direction. In other words, when vibration is applied to the cushion frame 6 to which the armrest frame 52 is connected, the displacement amount of the vibration generated in the first frame 521 in the seat width direction is smaller than the displacement amount of the vibration generated in the second frame 522 in the seat width direction.

[0061] 4 is a rectangular cylindrical member extending in the seat front-rear direction. That is, the third frame 523 has a closed cross section. The third frame 523 connects the first frame 521 and the second frame 522 in the seat front-rear direction.

[0062] Specifically, the front end of the third frame 523 is fixed to the first frame 521 at the first frame connecting portion 521C by, for example, welding. The first frame connecting portion 521C is located higher than the auxiliary connecting portion 521B of the first frame 521.

[0063] The rear end of the third frame 523 is fixed to the second frame 522 at the second frame connecting portion 522B by, for example, welding. The second frame connecting portion 522B is located higher than the second connecting portion 522A of the second frame 522.

[0064] The fourth frame 524 is a member extending in the front-rear direction of the seat. The fourth frame 524 connects the first frame 521 and the second frame 522 in the front-rear direction of the seat below the third frame 523.

[0065] Specifically, the fourth frame 524 has a front portion 524A that connects the first frame 521 and the second frame 522 in the seat front-rear direction, and a rear portion 524B that protrudes further rearward than the second frame 522 toward the rear of the seat.

[0066] The front portion 524A of the fourth frame 524 is a rectangular cylindrical portion. Two side walls of the front portion 524A facing each other in the seat width direction are respectively integrated with the first side wall 53 and the second side wall 54 of the first reinforcing portion 521D of the first frame 521. The two side walls of the front portion 524A are also respectively integrated with the first side wall 53 and the second side wall 54 of the second reinforcing portion 522D of the second frame 522.

[0067] The front portion 524A constitutes a part of a U-shaped hub frame 525. The hub frame 525 has the front portion 524A, a first reinforcing portion 521D extending upward from the seat front end portion of the front portion 524A, and a second reinforcing portion 522D extending upward from the seat rear end portion of the front portion 524A.

[0068] Hub frame 525 has multiple reinforcing plates sandwiched between two side walls. In other words, hub frame 525 has a truss structure and / or rigid frame structure inside. Hub frame 525 is connected to cushion frame 6 at two locations: auxiliary connecting portion 521B and the front and rear of second connecting portion 522A.

[0069] A rear portion 524B of the fourth frame 524 is fixed to the second frame 522 (that is, the hub frame 525) by, for example, welding. The seat rear end portion of the fourth frame 524 is located further forward of the seat than the upper end portion of the second frame 522.

[0070] [1-2.Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) The rigidity of the first frame 521 extending in the up-down direction in the seat width direction is increased by the multiple reinforcing plates 55. Therefore, the armrest frame 52 can be made lighter and vibration of the second armrest 5 can be suppressed.

[0071] (1b) The reinforcing plate 55 forms a truss structure together with the first side wall 53 and the second side wall 54, which can enhance the effect of improving the rigidity of the first frame 521 in the seat width direction.

[0072] (1c) The rigidity of the first frame 521 against vibration in the seat width direction is greater than the rigidity of the second frame 522 in the seat width direction, so that the displacement due to vibration of the first frame 521 arranged in the front of the seat is smaller than that of the second frame 522 arranged in the rear of the seat. As a result, vibration of the front portion of the arm holding portion 51 that the seat occupant's hands touch is suppressed.

[0073] (1d) The first frame 521 is fixed to the cushion frame 6 at two locations, top and bottom, by the first connecting portion 521A and the auxiliary connecting portion 521B, so that the rigidity of the first frame 521 against vibration can be increased with a relatively simple structure.

[0074] 2. Other Embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take on various forms.

[0075] (2a) In the vehicle seat of the above embodiment, the first frame does not necessarily have to have the auxiliary connecting portion. In other words, the first frame may be fixed to the cushion frame only at the connecting portion.

[0076] (2b) In the vehicle seat of the above embodiment, the rigidity of the first frame against vibration in the seat width direction does not necessarily have to be greater than the rigidity of the second frame against vibration in the seat width direction.

[0077] (2c) In the vehicle seat of the above embodiment, the second frame does not necessarily have to have the first side wall, the second side wall, and the plurality of reinforcing plates. For example, the second frame may be formed of an entirely cylindrical member.

[0078] (2d) The vehicle seat of the above embodiment can also be applied to seats used in automobiles other than passenger cars, and seats used in vehicles other than automobiles, such as railway cars, ships, and aircraft.

[0079] (2e) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, part of the configuration of the above embodiments may be omitted. Furthermore, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. All aspects included in the technical idea identified by the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0080] 1...vehicle seat, 2...seat cushion, 3...seat back, 4...First armrest, 5...Second armrest, 6...Cushion frame, 7...back frame, 51...arm holder, 52...armrest frame, 53...first side wall, 54...second side wall, 55...reinforcing plate, 61...first side frame, 62...Second side frame, 63...Front frame, 64...Rear frame, 65, 66, 67, 68, 69...Connecting bracket, 521...First frame, 521A...first connecting portion, 521B...auxiliary connecting portion, 521C...first frame connecting portion, 521D...first reinforcing portion, 522...second frame, 522A...second connecting portion, 522B...second frame connecting portion, 522D...second reinforcing portion, 523...third frame, 524...fourth frame, 524A...front, 524B...rear, 525...hub frame.

Claims

1. Seat cushion and Seat back and Armrest and a cushion frame supporting the seat cushion; Equipped with The armrest is an arm holding portion that forms an upper surface of the armrest; an armrest frame disposed below the arm holding portion; and The armrest frame is a first frame extending in the vertical direction and connected to the cushion frame; a second frame extending in the vertical direction and connected to the cushion frame at a position rearward of the first frame; and The first frame is a first side wall and a second side wall extending in the vertical direction and facing each other in the sheet width direction; a plurality of reinforcing plates connecting the first side wall and the second side wall in the seat width direction; and The thickness direction of the plurality of reinforcing plates intersects with the front-rear direction of the seat, The vehicle seat, wherein the rigidity of the first frame against vibration in the seat width direction is greater than the rigidity of the second frame against vibration in the seat width direction.

2. Seat cushion and Seat back and Armrest and a cushion frame supporting the seat cushion; Equipped with The armrest is an arm holding portion that forms an upper surface of the armrest; an armrest frame disposed below the arm holding portion; and The armrest frame includes a first frame extending in the vertical direction and connected to the cushion frame, The first frame is a first side wall and a second side wall extending in the vertical direction and facing each other in the sheet width direction; a plurality of reinforcing plates connecting the first side wall and the second side wall in the seat width direction; and The first frame is connected to the cushion frame at a connecting portion and an auxiliary connecting portion provided above the connecting portion, A vehicle seat, wherein a thickness direction of the plurality of reinforcing plates intersects with a front-rear direction of the seat.

3. Seat cushion and Seat back and Armrest and a cushion frame supporting the seat cushion; Equipped with The armrest is an arm holding portion that forms an upper surface of the armrest; an armrest frame disposed below the arm holding portion; and The armrest frame includes a first frame extending in the vertical direction and connected to the cushion frame, The first frame is a first side wall and a second side wall extending in the vertical direction and facing each other in the sheet width direction; a plurality of flat reinforcing plates connecting the first side wall and the second side wall in the seat width direction; and A vehicle seat, wherein a thickness direction of the plurality of reinforcing plates intersects with a front-rear direction of the seat and is aligned with an extension direction of the first frame.

4. The vehicle seat according to any one of claims 1 to 3, The vehicle seat, wherein the plurality of reinforcing plates, together with the first side wall and the second side wall, form a truss structure.

5. The vehicle seat according to any one of claims 2 to 4, the armrest frame includes a second frame extending in the up-down direction and connected to the cushion frame at a position rearward of the first frame, The vehicle seat, wherein the rigidity of the first frame against vibration in the seat width direction is greater than the rigidity of the second frame against vibration in the seat width direction.

6. The vehicle seat according to any one of claims 3 to 5, The first frame is connected to the cushion frame at a connecting portion and an auxiliary connecting portion provided above the connecting portion.

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