Vehicle seat

Abstract

To provide a vehicle seat that is able to enhance the rigidity of an armrest at a connection point between a base member and a turning member.SOLUTION: A vehicle seat includes: a seat main body; and an armrest provided on a side portion of the seat main body and extending in a seat front-rear direction. The armrest includes; a base member 10 attached to the seat body; a turning member 20 extending forward from the base member 10 and turning about an extending direction of the armrest; a shaft 30 turning the turning member 20 with respect to the base member 10; and a reinforcing member 40 attached to an outer peripheral surface of the shaft 30 and protruding in a radial direction of the shaft 30. A protruding portion of the reinforcing member 40 extends in a vertical directions and is disposed between the front end of the base member 10 and a rear end of the turning member 20.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat including a seat body and armrests provided on the sides of the seat body and extending in the front-rear direction of the seat. [Background technology]

[0002] A vehicle seat has been known that includes a seat back and an armrest that is rotatably attached to the seat back. The armrest is pivotally supported so that it can be switched between a stored position in which it is perpendicular to the seat body and a used position in which it is horizontal to the seat body.

[0003] For example, the armrest in Patent Document 1 has a storage table member (rotating member) attached to the tip of an armrest main body (base member) that extends in the front-to-rear direction of the seat. The storage table member is supported by the armrest main body so as to be rotatable around a shaft that extends in the direction in which the armrest extends. Because the storage table member has a wide surface and a narrow surface, it can be switched between a state in which the wide surface faces upward and a state in which the wide surface faces sideways.

[0004] In the armrest of Patent Document 2, the armrest pad (rotating member) is supported by a support bracket (base member) so as to be rotatable around an axis parallel to the front-to-rear direction. This allows the side end of the armrest pad to be switched between an upright position facing upward and a horizontal position facing to the right. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2007-044137 A [Patent Document 2] JP 2016-168906 A Summary of the Invention [Problem to be solved by the invention]

[0006] The armrest in Patent Document 1 or Patent Document 2 is divided in the front-to-rear direction and has a base member attached to the seat body and a rotating member that extends forward from the base member and rotates around an axis in the extension direction of the armrest. However, since a load is applied to the connection point between the base member and the rotating member, there is a risk that the rigidity against the load in the vertical direction may decrease.

[0007] An object of the present invention is to provide a vehicle seat that can increase the rigidity of the armrest at the connection point between the base member and the rotating member. [Means for solving the problem]

[0008] The above problem is solved by the vehicle seat of the present invention, which provides a vehicle seat comprising a seat body and an armrest provided on a side portion of the seat body and extending in the fore-and-aft direction of the seat, wherein the armrest has a base member attached to the seat body, a rotating member extending forward from the base member and rotating around an axis in the extension direction of the armrest, a shaft that rotates the rotating member relative to the base member, and a reinforcing member attached to the outer surface of the shaft and protruding radially from the shaft, and wherein the protruding portion of the reinforcing member is positioned between the front end of the base member and the rear end of the rotating member. With this configuration, a portion of the reinforcing member extends so as to protrude in the radial direction, thereby improving the rigidity of the armrest against a radial load at the connection point between the base member and the pivoting member, thereby increasing the rigidity of the armrest at the connection point between the base member and the pivoting member.

[0009] In this case, the reinforcing member has a cylindrical outer tube portion that covers the outer peripheral surface of the shaft, and a protrusion formed on the outer surface of the outer tube portion and protruding radially from the shaft, and the protrusion is preferably positioned between the front end of the base member and the rear end of the rotating member. With the above configuration, the reinforcing member is formed as a separate member from the shaft, which improves manufacturing efficiency compared to when the protrusion is formed directly on the shaft.

[0010] In this case, the reinforcing member includes a first reinforcing member that extends in the extension direction of the armrest and is positioned at the front end of the base member, and a second reinforcing member that extends in the extension direction of the armrest and is positioned at the rear end of the pivoting member, the first reinforcing member having a cylindrical first outer tube portion that covers the outer peripheral surface of the shaft, and a first protrusion formed on the outer surface of the first outer tube portion and protruding radially from the shaft, the second reinforcing member having a cylindrical second outer tube portion that covers the outer peripheral surface of the shaft, and a second protrusion formed on the outer surface of the second outer tube portion and protruding radially from the shaft, and the first protrusion and the second protrusion may face each other in the extension direction of the armrest. With the above configuration, the first protruding portion and the second protruding portion face each other in the extending direction of the armrest, which further increases the rigidity of the armrest at the connection point between the base member and the rotating member.

[0011] In this case, the reinforcing member is arranged between the first protrusion and the second protrusion and has a rotation adjustment member that adjusts the rotation of the rotating member, and the rotation adjustment member may abut against the first protrusion and the second protrusion. With the above configuration, the rotation speed of the rotating member can be adjusted by the rotation adjusting member, so that the rotating member can be prevented from rotating suddenly.

[0012] In this case, the rotating member can be switched between a normal position in which a support surface for placing the arms of the seated occupant faces upward, and a rotated position in which it rotates relative to the base member so that the support surface faces in the seat width direction, and the armrest has a first retaining member attached to the front end of the base member and holding the first reinforcing member, and a second retaining member attached to the rear end of the rotating member and holding the second reinforcing member, the second retaining member having a protrusion protruding toward the first retaining member, and the first retaining member being formed extending circumferentially of the shaft and having a notch with which the protrusion engages, and when the rotating member rotates from the normal position to the rotated position, the protrusion moves circumferentially of the shaft along the notch. With the above configuration, the protrusion on the rotating member that protrudes in the extension direction of the armrest engages with the cutout on the base member, thereby further increasing the rigidity of the armrest at the connection point between the base member and the rotating member.

[0013] In this case, the second retaining member has a convex portion that protrudes toward the first retaining member, and the first retaining member has a concave portion into which the convex portion can fit, and when the rotating member is in the normal position, the convex portion fits into the concave portion to restrict the rotation of the rotating member. With the above configuration, the convex portion on the rotating member that protrudes in the extension direction of the armrest engages with the concave portion on the base member, thereby further increasing the rigidity of the armrest at the connection point between the base member and the rotating member.

[0014] In this case, the second holding member may have a biasing member that biases the convex portion toward the concave portion of the first holding member. With the above-described configuration, the engagement between the convex portion and the concave portion can be used to restrict rotation, and the engagement state between the convex portion and the concave portion can be easily changed by the biasing member, thereby allowing the rotating member to be rotated easily.

[0015] In this case, the first retaining member preferably has a first front wall that retains the front end of the first outer tube portion, a first rear wall that retains the rear end of the first outer tube portion, and a first side wall that connects the first front wall and the first rear wall, and the second retaining member preferably has a second front wall that retains the front end of the second outer tube portion, a second rear wall that retains the rear end of the second outer tube portion, and a second side wall that connects the second front wall and the second rear wall. With the above-described configuration, the side walls connecting the front and rear walls can increase the rigidity of each holding member, thereby further increasing the rigidity of the armrest at the connection point between the base member and the pivot member.

[0016] In this case, the base member has a first frame, a first padding material covering the first frame, a first skin covering the first padding material, and a first skin mounting portion connected to a tip of the first skin for mounting the first skin to the first frame; the pivoting member has a second frame, a second padding material covering the second frame, a second skin covering the second padding material, and a second skin mounting portion connected to a tip of the second skin for mounting the second skin to the second frame; the first retaining member is attached to the first frame, and a first mounting portion for inserting the first skin mounting portion is formed between the first retaining member and the first frame; and the second retaining member is attached to the second frame, and a second mounting portion for inserting the second skin mounting portion is formed between the second retaining member and the second frame. With the above-mentioned configuration, the cover attachment part can be inserted into the gap between the frame and the holding member, so the frame and padding can be easily covered with the cover. Furthermore, because the cover attachment part is inserted into the gap between the frame and the holding member, it is not exposed to the outside, improving the design.

[0017] In this case, the rotating member can be switched between a normal position in which the support surface for placing the occupant's arms faces upward, and a rotated position in which it rotates relative to the base member so that the support surface faces in the seat width direction, and when viewed from the extension direction of the armrest, the position of the shaft can be offset in the vertical direction from the center position of the armrest. With the above configuration, when the front portion of the armrest is rotated, the amount of protrusion of the armrest in the seat width direction can be increased. [Effects of the Invention]

[0018] According to the present invention, the rigidity of the armrest at the connection point between the base member and the pivot member can be increased. Furthermore, according to the present invention, manufacturing efficiency can be improved compared to when the protrusion is directly formed on the shaft. Furthermore, according to the present invention, the rigidity of the armrest at the connection point between the base member and the pivot member can be further increased. Furthermore, according to the present invention, the rotating member can be prevented from rotating suddenly. Furthermore, according to the present invention, the rotating member can be easily rotated. Furthermore, according to the present invention, the frame and the padding can be easily covered with the cover, and the design can be improved. Furthermore, according to the present invention, the amount of protrusion of the armrest in the seat width direction can be increased. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view of a vehicle seat according to an embodiment of the present invention; [Figure 2] FIG. 2 is a top view of the vehicle seat. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6]FIG. 10 is a perspective view of the connection point between the base member and the rotating member, showing the state in which the pad and the cover are attached. [Figure 7] FIG. 10 is a side view of the connection point between the base member and the rotating member. [Figure 8] 10 is a view showing the auxiliary member disassembled from the shaft at the connection point between the base member and the rotating member. FIG. [Figure 9] FIG. 10 is a view showing a state in which the rotating member is rotated relative to the base member, as viewed from the front. [Figure 10] FIG. 10 is a view showing a state in which the rotating member is rotated relative to the base member, as viewed from the rear. [Figure 11] FIG. 10 is a perspective view of the connection point between the base member and the rotating member, showing a state in which the pad and the cover have been removed. [Figure 12] FIG. 10 is a perspective view of a first holding member, as viewed from the front left side. [Figure 13] FIG. 10 is a perspective view of the second holding member, as viewed from the rear left side. [Figure 14] FIG. 10 is a perspective view of the second holding member, as viewed from the rear right side. [Figure 15] FIG. 10 is a perspective view of a modified armrest. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the following description, the "front-rear direction" refers to the front-rear direction of the vehicle seat, which is the direction that coincides with the direction of travel when the vehicle is traveling. The "seat width direction" refers to the width direction of the vehicle seat, which is the direction that coincides with the left-right direction as seen by an occupant seated in the vehicle seat. The "up-down direction" refers to the up-down direction of the vehicle, which is the direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane.

[0021] As shown in FIG. 1, the vehicle seat S of the first embodiment includes a seat body (seat back 1, seat cushion 2, headrest 3) and armrests 4 provided on the sides of the seat body and extending in the front-to-rear direction of the seat.

[0022] As shown in FIG. 1, the seat back 1 is a backrest portion that supports the back of an occupant from behind, and is configured by placing a pad P on a back frame that serves as a skeleton, and covering the pad P with a skin T.

[0023] As shown in FIG. 1, the seat cushion 2 is a seating portion that supports an occupant from below, and is configured by placing a pad P on a seat frame that serves as a skeleton, and covering the pad P with a skin T.

[0024] As shown in FIG. 1, the headrest 3 is a head portion that supports the head of an occupant from behind, and is configured by placing a pad P on a headrest frame that serves as a skeleton, and covering the pad P with a skin T.

[0025] As shown in Fig. 1, the armrest 4 has a support surface 4a that supports the occupant's arms from below, and is provided at both ends of the seat back 1 in the seat width direction. The armrest 4 is attached to the seat back 1 so as to be rotatable around an axis extending in the seat width direction. The armrest 4 can be switched between an in-use state in which the support surface 4a faces upward, and a stored state in which it is stored in the seat back 1. In other words, the armrest 4 extends long in the front-to-rear direction when in use, and extends vertically along the seat back 1 when stored. The position where the armrest 4 is attached is not limited to the seat back 1, but may be the seat cushion 2, the vehicle body floor, the door, or the like.

[0026] As shown in FIG. 2, the front portions of the left and right armrests 4 (rotating members 20, described later) each rotate 90 degrees inward in the seat width direction, with the extension direction of the armrest 4 as an axis. When the rotating members 20 rotate inward in the seat width direction, the support surface 4a changes from facing upward to facing upward with the side surface 4b. In other words, when the rotating members 20 rotate, the side surface 4b becomes a surface on which the occupant's arm is placed. Note that the rotating members 20 of the armrests 4 may also rotate outward in the seat width direction. The left and right armrests 4 are symmetrical and have the same shape, so the following description will be given using the right armrest 4 as a representative example. Note that the left and right armrests 4 do not have to have the same shape, and may have different shapes.

[0027] The armrest 4 has a base member 10 attached to the seat body, a rotating member 20 that rotates around an axis in the extension direction of the armrest 4, a shaft 30 that rotates the rotating member 20 relative to the base member 10, a reinforcing member 40 attached to the outer circumferential surface of the shaft 30, a first holding member 50 attached to the front end of the base member 10, a second holding member 60 attached to the rear end of the rotating member 20, and a rotation operating member 70 that switches the armrest 4 between a usage state and a storage state. The following description will be given assuming that the armrest 4 is in the usage state.

[0028] 1 and 2, the base member 10 is a columnar member that extends longitudinally in the front-rear direction and is attached to the seat back 1. As shown in FIGS. 3 to 6, the base member 10 has a first frame 11 that forms the framework of the armrest 4, a first padding material 12 that covers the first frame 11, a first skin 13 that covers the first padding material 12, a first skin attachment portion 14 for attaching the first skin 13 to the first frame 11, and a rotation shaft 15 that supports the first frame 11 rotatably with respect to the seat back 1.

[0029] As shown in Figures 3 to 5, the first frame 11 is a box-shaped sheet metal member that extends in the front-rear direction and is open on the left side. A rotation shaft 15 is attached to the rear end of the first frame 11. A locking device 71 for a rotation operation member 70 is attached to the center of the first frame 11 in the front-rear direction. A first holding member 50 is attached to the front end of the first frame 11.

[0030] As shown in FIG. 6, the first pad material 12 is a cushion material for the base member 10 and is placed on the upper and lower surfaces of the first frame 11. The first skin 13 is a covering material for the base member 10, and covers the outer surfaces of the first frame 11 and the first padding material 12. The first skin 13 is made of fabric, film, cloth, leather, sheet, or the like, and is attached to the first frame 11 so as to cover the first padding material 12 in a stretched state with a predetermined tension applied.

[0031] The first skin mounting portion 14 is a generally rectangular trim plate made of resin or leather, and is connected to the leading end of the first skin 13. The first skin mounting portion 14 is inserted into a first mounting portion (a first upper step 55, a first lower step 56, a first side step 57, and a gap SP between the first frame 11 and the first holding member 50) formed between the first frame 11 and the first holding member 50.

[0032] 3, the pivot shaft 15 is a shaft member that extends in the front-rear direction of the seat. More specifically, the pivot shaft 15 is attached to the rear end of the first frame 11, protrudes leftward from the inner surface of the first frame 11, and is connected to the seat back 1. The base member 10 is attached to the seat back 1 so as to be rotatable via a rotation shaft 15. Therefore, the armrest 4 can be switched from an in-use state to a stored state around the rotation shaft 15.

[0033] 1 and 2, the rotating member 20 is a columnar member that extends long in the front-to-rear direction, extends forward from the base member 10, and rotates around an axis that is the extension direction of the armrest 4. As shown in FIGS. 3 to 6, the rotating member 20 has a second frame 21 that forms the skeleton of the armrest 4, a second padding material 22 that covers the second frame 21, a second skin 23 that covers the second padding material 22, and a second skin attachment portion 24 for attaching the second skin 23 to the second frame 21.

[0034] As shown in Figure 2, the rotating member 20 can be switched between a normal position in which the support surface 4a for placing the arms of the seated occupant faces upward, and a rotated position in which it rotates relative to the base member 10 and the support surface 4a faces in the seat width direction. In this embodiment, the side surface 4b is wider than the support surface 4a. Therefore, when the rotating member 20 is in the rotated position, the seated person can place their arms more stably. The sizes of the support surface 4a and the side surface 4b are not limited to this, and the support surface 4a may be wider than the side surface 4b, or they may be the same size.

[0035] 3 to 5, the second frame 21 is a box-shaped sheet metal member that extends in the front-rear direction and is open on the left side. A second holding member 60 is attached to the rear end of the second frame 21. In addition, an operation piece 73 of a rotation operation member 70 is attached to the front end of the second frame 21.

[0036] As shown in FIG. 6, the second pad material 22 is a cushion material for the rotating member 20, and is placed on the upper and lower surfaces of the second frame . The second skin 23 is a covering material for the rotating member 20, and covers the outer surfaces of the second frame 21 and the second pad material 22. The second skin 23 is made of fabric, film, cloth, leather, sheet, or the like, and is attached to the second frame 21 so as to cover the second pad material 22 in a stretched state with a predetermined tension applied.

[0037] The second skin mounting portion 24 is a generally rectangular trim plate made of resin or leather, and is connected to the leading end of the second skin 23. The second skin mounting portion 24 is inserted into a second mounting portion (a second upper step 65, a second lower step 66, a second side step 67, and a gap SP between the second frame 21 and the second holding member 60) formed between the second frame 21 and the second holding member 60 (a second upper step 65, a second lower step 66, a second side step 67, and a gap SP between the second frame 21, which will be described later).

[0038] 3, the shaft 30 is a metallic shaft member that extends elongated in the front-to-rear direction and rotates the rotating member 20 relative to the base member 10. The base member 10 and the rotating member 20 are connected by the shaft 30. The rotating member 20 is held by a first holding member 50 attached to the front end of the base member 10 and a second holding member 60 attached to the rear end of the rotating member 20.

[0039] 7 and 8, shaft 30 has a shaft body 31 arranged to penetrate first retaining member 50 and second retaining member 60 in the front-to-rear direction, and a nut 32 and a fixed end portion 33 for fixing shaft body 31 to first retaining member 50 and second retaining member 60. Base member 10 and rotating member 20 are connected by inserting shaft body 31 through first retaining member 50 and second retaining member 60 and fixing it with nut 32 and fixed end portion 33 via rear washer 34 and front washer 35. As shown in FIG. 4, shaft body 31 has a central portion formed with a through hole 31a for passing a wire 72, which will be described later.

[0040] 7 and 8 , the outer circumferential surface of barrel body 31 toward its rear end is covered by first reinforcing member 41, which will be described later. The outer circumferential surface of barrel body 31 toward its front end is covered by second reinforcing member 42, which will be described later. In other words, shaft 30 is held by first retaining member 50 and second retaining member 60 via first reinforcing member 41 and second reinforcing member 42. In this way, the shaft 30 connects the base member 10 and the pivoting member 20 via the reinforcing member 40, the first retaining member 50 and the second retaining member 60, thereby increasing the rigidity of the armrest 4 at the connection point between the base member 10 and the pivoting member 20.

[0041] As shown in FIG. 6 , when viewed from the extending direction (front) of the armrest 4, the position of the shaft 30 is offset downward in the up-down direction from the center position of the armrest 4. This allows the amount of protrusion of the armrest 4 in the seat width direction to be increased when the front portion of the armrest 4 (the rotating member 20) is rotated. More specifically, as shown in FIGS. 9 and 10 , the armrest 4 is formed such that the outer wall surface 21b of the second frame 21 that forms the side surface 4b is wider than the upper wall surface 21a of the second frame 21 that forms the mounting surface 4a. Therefore, when the rotating member 20 is in the rotated position, the upper wall surface 21a of the second frame 21 protrudes inward beyond the first frame 11 of the base member 10. In this way, when the armrest 4 is in the rotated position, a seated occupant can easily rest their arms on the side surface 4b. The direction in which the shaft 30 is offset is not limited to this, and the shaft 30 may be offset upward in the up-down direction from the center position of the armrest 4.

[0042] 6 to 8, reinforcing member 40 is a resin or metal member for reinforcing shaft body 31 of shaft 30. Reinforcing member 40 has a first reinforcing member 41 arranged at the front end of base member 10, a second reinforcing member 42 arranged at the rear end of rotating member 20, and a rotation adjustment member 43 that adjusts the rotation of rotating member 20.

[0043] As shown in Fig. 8, first reinforcing member 41 is a cylindrical member extending in the extension direction of armrest 4. First reinforcing member 41 is attached to shaft 30 so as to cover the outer peripheral surface of the rear end side of shaft body 31. Furthermore, first reinforcing member 41 is held in first through-hole 52 of first holding member 50, as shown in Figs. 11 and 12. The first reinforcing member 41 has a cylindrical first outer tube portion 41a that covers the outer peripheral surface of the shaft 30, and a first protruding portion 41b that is formed on the outer surface of the first outer tube portion 41a and protrudes radially from the shaft 30.

[0044] First outer cylinder portion 41a is a portion having a cylindrical shape, and covers the outer peripheral surface on the rear end side of barrel body 31. A first protrusion 41b is formed at the front end of first outer cylinder portion 41a. The first protruding portion 41b is a flange that extends in the radial direction of the shaft 30 from the outer surface of the first outer cylindrical portion 41a.

[0045] As shown in Fig. 8, second reinforcing member 42 is a cylindrical member extending in the extension direction of armrest 4. Second reinforcing member 42 is attached to shaft 30 so as to cover the outer peripheral surface of the front end side of shaft body 31. Furthermore, second reinforcing member 42 is held in second through-hole 62 of second holding member 60, as shown in Figs. 11 and 13. The second reinforcing member 42 has a cylindrical second outer tube portion 42a that covers the outer peripheral surface of the shaft 30, and a second protruding portion 42b that is formed on the outer surface of the second outer tube portion 42a and protrudes radially from the shaft 30.

[0046] Second outer cylinder portion 42a is a portion having a cylindrical shape, and covers the outer peripheral surface on the front end side of barrel body 31. Second protrusion portion 42b is formed at the rear end of second outer cylinder portion 42a. The second protruding portion 42b is a flange that extends in the radial direction of the shaft 30 from the outer surface of the second outer cylindrical portion 42a.

[0047] 8, rotation adjustment member 43 is a ring-shaped resin member, and is attached to the front-rear central portion of shaft body 31. Rotation adjustment member 43 is disposed between first protrusion 41b and second protrusion 42b in the front-rear direction. Both surfaces of rotation adjustment member 43 are treated with an anti-slip coating. The rotation adjustment member 43 is a member for adjusting the rotation speed of the rotation member 20 relative to the base member 10. The rotation adjustment member 43 abuts against the first protrusion 41b and the second protrusion 42b. Specifically, the rear surface of the rotation adjustment member 43 abuts against the first protrusion 41b, and the front surface of the rotation adjustment member 43 abuts against the second protrusion 42b. Therefore, the rotation speed of the rotation adjustment member 20 relative to the base member 10 slows down due to the frictional force between the rear surface of the rotation adjustment member 43 and the first protrusion 41b, and the frictional force between the front surface of the rotation adjustment member 43 and the second protrusion 42b.

[0048] In this way, the rotation speed of the rotating member 20 can be adjusted by the rotation adjustment member 43, so that the rotating member 20 can be prevented from rotating suddenly. In this embodiment, both surfaces of the rotation adjustment member 43 are anti-slip processed to slow down the rotation speed by frictional force, but this is not limiting. For example, both surfaces of the rotation adjustment member 43 may be made slippery. In this case, the frictional force is reduced, and the rotation speed of the rotating member 20 relative to the base member 10 can be increased, allowing the rotating member 20 to rotate smoothly.

[0049] 7, when the first reinforcing member 41 is attached to the first holding member 50, the first protruding portion 41b is positioned forward of the front end of the first holding member 50. When the second reinforcing member 42 is attached to the second holding member 60, the second protruding portion 42b is positioned rearward of the rear end of the second holding member 60. In the extending direction of the armrest 4, the first protruding portion 41b and the second protruding portion 42b face each other with the rotation adjustment member 43 interposed therebetween.

[0050] The reinforcing member 40 is attached to the outer peripheral surface of the shaft 30 and protrudes in the radial direction of the shaft 30. Specifically, the protruding portion of the reinforcing member 40 extends in the vertical direction and is disposed between the front end of the base member 10 and the rear end of the rotating member 20. More specifically, the first protrusion 41b and the second protrusion 42b each extend radially of the shaft 30 and are positioned between the front end surface of the first retaining member 50 protruding forward from the first frame 11 and the rear end surface of the second retaining member 60 protruding rearward from the second frame 21.

[0051] In this way, the first protrusion 41b and the second protrusion 42b are positioned between the front end of the base member 10 and the rear end of the pivoting member 20, thereby increasing the rigidity of the armrest 4 at the connection point between the base member 10 and the pivoting member 20. More specifically, when a force is applied from above to the rotating member 20, the lower end of the second protrusion 42b attempts to rotate downward and rearward. However, the movement of the lower end of the second protrusion 42b is restricted by the lower end of the first protrusion 41b. Therefore, the force is prevented from being directly applied to the shaft 30.

[0052] For example, if reinforcing member 40 is not provided, when a load is applied from above to the connection point between base member 10 and rotating member 20, there is a risk that the force will be applied directly to shaft body 31 of shaft 30 from above. In this embodiment, the reinforcing member 40 is provided so as to protrude in the vertical direction from the shaft 30, and therefore when a force is applied from above to the connection point between the base member 10 and the rotating member 20, the force from above is applied to the reinforcing member 40. This reduces the force applied to the shaft body 31 of the shaft 30, and prevents the shaft 30 from being distorted or damaged.

[0053] In this embodiment, the reinforcing member 40 protruding in the radial direction of the shaft 30 is configured to be detachably attached to the outer circumferential surface of the shaft 30. However, the present invention is not limited to this, and the reinforcing member 40 may be welded to the outer circumferential surface of the shaft 30. In addition, the reinforcing member 40 has two portions, the first protruding portion 41b and the second protruding portion 42b, protruding in the radial direction of the shaft 30. However, the present invention is not limited to this, and the number of portions protruding in the radial direction of the shaft 30 may be one.

[0054] Furthermore, in this embodiment, the portion of the reinforcing member 40 that protrudes in the radial direction of the shaft 30 has a flange shape, and therefore can reinforce the connecting point between the base member 10 and the rotating member 20 regardless of the direction from which a load is applied. However, the present invention is not limited to this, and it is sufficient that the portion of the reinforcing member 40 that protrudes in the radial direction of the shaft 30 protrudes at least in the radial direction of the shaft 30 in the direction in which the load is applied.

[0055] 11 and 12, the first holding member 50 is a resin member having a rectangular parallelepiped shape that is elongated in the vertical direction. The first holding member 50 is attached to the front end of the base member 10 and holds the first reinforcing member 41. More specifically, the first holding member 50 is attached to the inside of the front end portion of the first frame 11 and supports the shaft 30 via the first reinforcing member 41 .

[0056] The first retaining member 50 has a first front wall 51a that holds the front end of the first outer tube portion 41a, a first rear wall 51b that holds the rear end of the first outer tube portion 41a, a first upper wall 51c that connects the upper end of the first front wall 51a to the upper end of the first rear wall 51b, a first lower wall 51d that connects the lower end of the first front wall 51a to the lower end of the first rear wall 51b, a first left side wall 51e that connects the left end of the first front wall 51a to the left end of the first rear wall 51b, and a first right side wall 51f that connects the right end of the first front wall 51a to the right end of the first rear wall 51b.

[0057] In this way, the first holding member 50 is formed into a rectangular parallelepiped shape by the side walls (first upper wall 51c, first lower wall 51d, first left side wall 51e, and first right side wall 51f) connecting the first front wall 51a and the first rear wall 51b. This increases the rigidity of the first holding member 50. This further increases the rigidity of the armrest 4 at the connection point between the base member 10 and the rotating member 20. Although the first holding member 50 has a solid block shape, it may also have a hollow box shape.

[0058] As shown in Figure 11, the first retaining member 50 has a first through hole 52 that penetrates in the front-to-rear direction, a notch portion 53 that is formed extending circumferentially around the shaft 30 and into which a protrusion 63 of the second retaining member 60 described later engages, and a recess 54 into which a convex portion 64 of the second retaining member 60 fits. The first through-hole 52 is formed through the main body of the first holding member 50 and holds the shaft 30 and the first reinforcing member 41 .

[0059] 12, the cutout portion 53 is formed by cutting out the first front wall 51a and the first left side wall 51e. In other words, the cutout portion 53 has a shape that is recessed rearward from the first front wall 51a and recessed rightward from the first left side wall 51e. When viewed from the front, the cutout portion 53 extends longitudinally along the circumferential direction of the shaft 30. That is, the notch portion 53 is curved along the moving direction of the protrusion portion 63 of the second holding member 60 and serves as a guide portion for the protrusion portion 63.

[0060] The recess 54 is a hole recessed rearward from the first front wall 51a. When the rotating member 20 is in the normal position, the protrusion 64 of the second holding member 60 fits into the recess 54. That is, the fitting of the protrusion 64 into the recess 54 restricts the rotation of the rotating member 20.

[0061] A first upper step 55 is formed in a front portion of the first upper wall 51c of the first holding member 50. A first lower step 56 is formed in a front portion of the first lower wall 51d. Furthermore, a first side step 57 is formed in a front portion of the first right side wall 51f. 11 , when the first holding member 50 is attached to the first frame 11, a first attachment portion into which the first skin attachment portion 14 is inserted is formed between the first holding member 50 and the first frame 11. More specifically, a gap SP that serves as the first attachment portion is formed between the first upper step 55, the first lower step 56, the first side step 57, and the first frame 11.

[0062] In this way, the first upper step 55, the first lower step 56, and the first side step 57 are formed at the front end portion of the first holding member 50 so as to form a gap SP between the first frame 11 and the first holding member 50. Therefore, as shown in Fig. 6, the first skin 13 can be attached to the first frame 11 by inserting the first skin attachment portion 14 into the gap SP. Therefore, the first skin attachment portion 14 can be inserted into the gap SP between the first frame 11 and the first holding member 50, and the first frame 11 and the first padding 12 can be easily covered with the first skin 13. Furthermore, by inserting the first skin attachment portion 14 into the gap SP between the first frame 11 and the first holding member 50, the first skin attachment portion 14 is not exposed to the outside, thereby improving the design. Note that a step may also be formed in the front portion of the first left side wall 51e.

[0063] 11 and 12, the second holding member 60 is a resin member having a rectangular parallelepiped shape that is elongated in the vertical direction. The second holding member 60 is attached to the rear end of the rotating member 20 and holds the second reinforcing member 42. More specifically, the second holding member 60 is attached to the inside of the rear end portion of the second frame 21 and supports the shaft 30 via the second reinforcing member 42 .

[0064] The second retaining member 60 has a second front wall 61a that retains the front end of the second outer tube portion 42a, a second rear wall 61b that retains the rear end of the second outer tube portion 42a, a second upper wall 61c that connects the upper end of the second front wall 61a to the upper end of the second rear wall 61b, a second lower wall 61d that connects the lower end of the second front wall 61a to the lower end of the second rear wall 61b, a second left side wall 61e that connects the left end of the second front wall 61a to the left end of the second rear wall 61b, and a second right side wall 61f that connects the right end of the second front wall 61a to the right end of the second rear wall 61b.

[0065] In this way, the first holding member 50 is formed into a rectangular parallelepiped shape by the side walls (second upper wall 61c, second lower wall 61d, second left side wall 61e, and second right side wall 61f) connecting the second front wall 61a and the second rear wall 61b. This increases the rigidity of the second holding member 60. This further increases the rigidity of the armrest 4 at the connection point between the base member 10 and the rotating member 20. Although the second holding member 60 has a solid block shape, it may also have a hollow box shape.

[0066] 11, the second holding member 60 has a second through-hole 62 penetrating in the front-rear direction, a protrusion 63 protruding toward the first holding member 50, and a convex portion 64 protruding toward the first holding member 50. The second holding member 60 also has a biasing member 64a that biases the convex portion 64 toward the recessed portion 54 of the first holding member 50. The convex portion 64 is biased rearward by the biasing member 64a. The second through-hole 62 is formed through the main body of the second holding member 60 and holds the shaft 30 and the second reinforcing member 51 .

[0067] 13 and 14, the protrusion 63 is a rod-shaped metal member that extends rearward from the first front wall 51a. The protrusion 63 is movably engaged with the notch 53. The protrusion 63 moves leftward from the normal position shown in FIG. 11 along the notch 53 around the shaft 30, and is disposed in the rotated position shown in FIG.

[0068] 10, the protrusion 63 abuts against the first left side wall 51e of the first holding member 50, restricting movement to the left and holding the protrusion 63 in the pivoted position. In other words, the first left side wall 51e serves as a stopper for the pivotable member 20 in the pivoted position. 11, protrusion 63 abuts against curved end 53a of notch 53 of first holding member 50, restricting rightward movement and holding it in the normal position. In other words, curved end 53a of notch 53 serves as a stopper for rotating member 20 in the normal position.

[0069] In this way, when the rotating member 20 rotates from the normal position to the rotated position, the protrusion 63 moves along the notch 53 . In this way, the protrusion 63 on the rotating member 20 side that protrudes in the extension direction of the armrest 4 engages with the notch 53 on the base member 10 side, thereby further increasing the rigidity of the armrest 4 at the connection point between the base member 10 and the rotating member 20. Furthermore, the protrusion 63 can restrict the movement of the rotating member 20, thereby improving the stability of the armrest 4.

[0070] The protrusion 64 is a rod-shaped member made of resin that extends rearward from the first front wall 51a. The protrusion 64 is a protruding portion that is different from the protrusion 63 and is disposed above the protrusion 63. The protrusion 64 is detachably fitted into the recess 54. The rear end of the protrusion 64 has a semispherical shape. Because the rear end of the protrusion 64 is rounded, the fitting with the recess 54 becomes easier to release when the rotating member 20 is rotated from the normal position to the rotated position.

[0071] The biasing member 64a is attached to the inside of an insertion hole 61g that penetrates the second front wall 61a and the second rear wall 61b. The biasing member 64a is connected to the front end of the protrusion 64 and biases the protrusion 64 rearward.

[0072] 7 in which it fits into the recess 54, and a storage position in which it moves forward against the biasing force of the biasing member 64a and is no longer fitted into the recess 54. The protrusion 64 is slidably disposed in the insertion hole 61g. When a seated person attempts to rotate the rotating member 20 from the normal position to the rotating position, the convex portion 64 moves forward against the biasing force and disengages from the concave portion 54, thereby rotating the rotating member 20. In other words, the convex portion 64 serves as a stopper for the rotating member 20 in the normal position.

[0073] In this way, when the rotating member 20 is in the normal position, the convex portion 64 fits into the concave portion 54 to restrict the rotation of the rotating member 20. In this way, the convex portion 64 on the rotating member 20 side that protrudes in the extension direction of the armrest 4 fits into the concave portion 54 on the base member 10 side, thereby further increasing the rigidity of the armrest 4 at the connection point between the base member 10 and the rotating member 20. Furthermore, the convex portion 64 can restrict the movement of the rotating member 20, thereby improving the stability of the armrest 4.

[0074] 13 and 14, a second upper step 65 is formed in a rear portion of the second upper wall 61c of the second holding member 60. A second lower step 66 is formed in a rear portion of the second lower wall 61d. Furthermore, a second side step 67 is formed in a rear portion of the second right side wall 61f. 11 , when the second holding member 60 is attached to the second frame 21, a second attachment portion into which the second skin attachment portion 24 is inserted is formed between the second holding member 60 and the second frame 21. More specifically, a gap SP that serves as the second attachment portion is formed between the second upper step 65, the second lower step 66, the second side step 67, and the second frame 21.

[0075] In this way, the second upper step 65, the second lower step 66, and the second side step 67 are formed at the rear end portion of the second holding member 60 so as to form a gap SP between the second holding member 60 and the second frame 21. Therefore, as shown in Fig. 6, the second skin 23 can be attached to the second frame 21 by inserting the second skin attachment portion 24 into the gap SP. Therefore, the second skin attachment portion 24 can be inserted into the gap SP between the second frame 21 and the second holding member 60, and the second frame 21 and the second padding 22 can be easily covered with the second skin 23. Furthermore, by inserting the second skin attachment portion 24 into the gap SP between the second frame 21 and the second holding member 60, the second skin attachment portion 24 is not exposed to the outside, thereby improving the design. Note that a step may also be formed in the rear portion of the second left side wall 61e.

[0076] 3 to 5, the rotation operation member 70 switches the armrest 4 between an in-use state and a stored state. The rotation operation member 70 is a known armrest lock mechanism, and includes a locking device 71 that locks the armrest 4 in a predetermined position, a wire 72 for operating the locking device 71, and an operation piece 73 that is operated by the seat occupant.

[0077] 5, the locking device 71 is a device for locking the armrest 4 at a predetermined position between the use state and the storage state. The locking device 71 has an engaged portion 71a provided on the rotation shaft 15, an engaging portion 71b that engages with the engaged portion 71a, a coil spring 71c that biases the engaging portion 71b, and a wire attachment portion 71d for attaching the wire 72.

[0078] The wire 72 is a string-like connecting member that connects the locking device 71 and the operation piece 73. As shown in Figures 4 and 5, the wire 72 extends long in the front-rear direction, passes through the through hole 31a of the shaft 30, and connects the wire attachment portion 71d and the operation piece 73. The operation piece 73 is, for example, a nylon tape member, and is a member for operating the locking device 71 via the wire 72. The operation piece 73 protrudes forward from the front end of the second frame 21.

[0079] The seat occupant can switch the armrest 4 between the in-use state and the stored state by pulling the operating piece 73 forward. As shown in Figure 5, pulling the operating piece 73 forward moves the wire attachment part 71d upward via the wire 72. As the wire attachment part 71d moves upward, the locking part 71b moves downward against the biasing force of the coil spring 71c. Then, as the locking part 71b moves, the locking part 71b and the locked part 71a are disengaged from each other, thereby releasing the lock and allowing the armrest 4 to rotate about the rotation shaft 15. When the seated person releases the operating piece 73 at a predetermined position, the biasing force of the coil spring 71c returns each member to its original position, and the locking portion 71b and the locked portion 71a engage with each other, locking the armrest 4.

[0080] In this way, the first protrusion 41b and the second protrusion 42b that protrude radially from the shaft 30 are positioned between the front end of the base member 10 and the rear end of the pivoting member 20, thereby increasing the rigidity of the armrest 4 at the connection point between the base member 10 and the pivoting member 20. Therefore, when the armrest 4 is in use, even if a force is applied from above to the connection point between the base member 10 and the rotating member 20, the force applied to the shaft 30 can be reduced by the reinforcing member 40. As a result, distortion or breakage of the shaft 30 can be suppressed.

[0081] <Modification> Next, a modified armrest 104 will be described with reference to Fig. 15. Note that the description of the same content as that of the armrest 4 will be omitted. The armrest 104 has a base member 110 attached to the seat body, a rotating member 120 that rotates around an axis in the extension direction of the armrest 4, a shaft 130 that rotates the rotating member 120 relative to the base member 110, a reinforcing member 140 attached to the outer surface of the shaft 130, a first retaining member 150 attached to the front end of the base member 110, and a second retaining member 160 attached to the rear end of the rotating member 120.

[0082] Shaft 130 has a shaft body 131 arranged to penetrate first retaining member 150 and second retaining member 160 in the front-rear direction, a nut 132 and a fixed end 133 for fixing shaft body 131 to first retaining member 150 and second retaining member 160, and an elastic member 136 arranged between fixed end 133 and second front wall 161a. Shaft body 131 is inserted through first retaining member 150 and second retaining member 160 and fixed with nut 132 and fixed end 133 via rear washer 134, front washer 135, and elastic member 136, thereby connecting base member 110 and rotating member 120. The rear washer 134 is disposed on the rear surface of the first rear wall 151b, but may be attached to the front surface of the first rear wall 151b and the rear surface of the first front wall 151a. The front washer 135 is disposed on the front surface of the second front wall 161a, but may be attached to the rear surface of the second front wall 161a and the front surface of the second rear wall 161b.

[0083] Reinforcing member 140 is a resin or metal member for reinforcing shaft body 131 of shaft 130, and is attached to the outer circumferential surface of shaft 130. Reinforcing member 140 is composed of ring-shaped first protruding portion 141b and second protruding portion 142b that protrude radially from shaft 130. The first protruding portion 141b and the second protruding portion 142b each protrude in the radial direction of the shaft 130, and are disposed between the front end surface of a first holding member 150 provided on the first frame 111 and the rear end surface of a second holding member 160 provided on the second frame 112. The first protruding portion 141b and the second protruding portion 142b face each other with the rotation adjustment member 143 interposed therebetween.

[0084] First retaining member 150 has a first front wall 151a that retains the central portion and first protruding portion 141b of shaft body 131, and a first rear wall 151b that retains the rear end portion of shaft body 131. The first holding member 150 is, for example, a metal plate, and is welded to the front end of the first frame 111.

[0085] The first retaining member 150 is formed to extend in the circumferential direction of the shaft 130, and has a notch portion 153 into which the protrusion portion 163 of the second retaining member 160 engages, and a recess portion 154 into which the convex portion 164 of the second retaining member 160 fits. The notch 153 is a slit formed in the first front wall 151a and penetrating in the front-rear direction. The recess 154 is a hole formed in the first front wall 151a and penetrating in the front-rear direction.

[0086] Second holding member 160 has a second front wall 161a that holds the front end of shaft body 131, and a second rear wall 161b that holds the central portion of shaft body 131 and second protruding portion 142b. The second holding member 160 is, for example, a metal plate, and is welded to the rear end of the second frame 121.

[0087] In addition, the second holding member 160 has a protrusion 163 that protrudes toward the first holding member 150 and a convex portion 164 that protrudes toward the first holding member 150 . The second holding member 160 has a biasing member (not shown) that biases the convex portion 164 toward the concave portion 154 of the first holding member 150 .

[0088] In this way, since the first holding member 150 and the second holding member 160 are configured as parts of the respective frames, the shaft 130 can be held with a simple configuration. In addition, since the first protrusion 141b and the second protrusion 142b that protrude radially from the shaft 130 are positioned between the front end of the base member 110 and the rear end of the pivoting member 120, the rigidity of the armrest 104 at the connection point between the base member 110 and the pivoting member 120 can be increased. Therefore, when armrest 104 is in use, even if a force is applied from above to the connection point between base member 110 and rotating member 120, the force applied to shaft 130 can be reduced by reinforcing member 140. As a result, distortion or breakage of shaft 130 can be suppressed.

[0089] In the above embodiment, a vehicle seat used in an automobile was described as a specific example, but the present invention is not limited to this and can be used for various seats such as two-wheeled seats for two-wheeled vehicles, seats for vehicles such as trains and buses, seats for vehicles such as airplanes and ships, as well as office chairs for work, wheelchairs, and child seats in shopping carts.

[0090] In the present embodiment, the vehicle seat according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention naturally includes equivalents thereof. [Explanation of symbols]

[0091] S vehicle seat 1 seat back 2 seat cushions 3 Headrest 4, 104 Armrest 4a Placement surface 4b side 10, 110 Base material 11, 111 First frame 12, 112 First pad material 13 First epidermis 14 First skin attachment part 15 Rotating shaft 20, 120 Rotating member 21, 121 Second Frame 21a Upper wall 21b Exterior wall surface 22 Second pad material 23 Second epidermis 24 Second skin attachment part 30, 130 shaft 31, 131 Shaft body 31a Passing hole 32, 132 nuts 33, 133 Fixed end 34, 134 Rear washer 35, 135 Front washer 136 Elastic member 40, 140 Reinforcement member 41 First reinforcing member 41a First outer cylinder part (outer cylinder part) 41b, 141b First protrusion (protrusion) 42 Second reinforcing member 42a Second outer cylinder part (outer cylinder part) 42b, 142b Second protrusion (protrusion) 43, 143 Rotation adjustment member 50, 150 First holding member 51a, 151a First front wall 51b, 151b First rear wall 51c First upper wall 51d First lower wall 51e First left wall (first side wall) 51f First right wall (first side wall) 52 First through hole 53, 153 Notch 53a Curved end 54, 154 recess 55 First upper section 56 First lower section 57 First side step 60, 160 Second holding member 61a, 161a Second front wall 61b, 161b Second rear wall 61c Second upper wall 61d Second lower wall 61e Second left wall (second side wall) 61f Second right wall (second side wall) 61g Insertion hole 62 Second through hole 63, 163 protrusion 64, 164 convex part 64a biasing member 65 Second upper section 66 Second lower section 67 Second side step 70 Rotating operation member 71 Locking device 71a Locked part 71b Locking part 71c coil spring 71d Wire attachment part 72 wires 73 Operation piece P Pad T epidermis SP Gap

Claims

1. A vehicle seat comprising: a seat body; and an armrest provided on a side portion of the seat body and extending in a front-rear direction of the seat, The armrest is a base member attached to the seat body; a rotating member extending forward from the base member and rotating about an axis in the extension direction of the armrest; a shaft that rotates the rotating member relative to the base member; a reinforcing member attached to an outer circumferential surface of the shaft and protruding in a radial direction of the shaft, The vehicle seat according to claim 1, wherein the protruding portion of the reinforcing member is disposed between the front end of the base member and the rear end of the rotating member.

2. the reinforcing member has a cylindrical outer cylinder portion that covers the outer peripheral surface of the shaft, and a protrusion formed on an outer surface of the outer cylinder portion and protruding in a radial direction of the shaft, 2. The vehicle seat according to claim 1, wherein the protrusion is disposed between a front end of the base member and a rear end of the rotating member.

3. The reinforcing member is a first reinforcing member extending in the extension direction of the armrest and disposed at a front end of the base member; a second reinforcing member extending in the extension direction of the armrest and disposed at a rear end of the pivoting member, The first reinforcing member is a cylindrical first outer cylindrical portion that covers the outer peripheral surface of the shaft; and a first protruding portion that is formed on the outer surface of the first outer cylindrical portion and protrudes in a radial direction of the shaft, The second reinforcing member is a cylindrical second outer cylindrical portion that covers the outer circumferential surface of the shaft; and a second protruding portion that is formed on the outer surface of the second outer cylindrical portion and protrudes in the radial direction of the shaft, The vehicle seat according to claim 2, wherein the first protruding portion and the second protruding portion face each other in the extending direction of the armrest.

4. the reinforcing member has a rotation adjustment member that is disposed between the first protruding portion and the second protruding portion and adjusts the rotation of the rotating member, The vehicle seat according to claim 3, wherein the rotation adjustment member abuts against the first protruding portion and the second protruding portion.

5. the rotating member is switchable between a normal position in which a support surface for supporting the arms of a seated occupant faces upward and a rotated position in which the support surface faces a seat width direction by rotating with respect to the base member, The armrest is a first holding member attached to the front end of the base member and holding the first reinforcing member; a second holding member attached to the rear end of the rotating member and holding the second reinforcing member, the second holding member has a protrusion that protrudes toward the first holding member, the first retaining member has a notch portion formed to extend in a circumferential direction of the shaft and engaged with the protrusion portion, 5. The vehicle seat according to claim 3, wherein when the rotating member rotates from the normal position to the rotated position, the protrusion moves in the circumferential direction of the shaft along the notch.

6. the second holding member has a protrusion that protrudes toward the first holding member, the first holding member has a recess into which the protrusion can be fitted, 6. The vehicle seat according to claim 5, wherein when the rotating member is in the normal position, the convex portion fits into the concave portion to restrict the rotation of the rotating member.

7. The vehicle seat according to claim 6, wherein the second holding member has a biasing member that biases the convex portion toward the concave portion of the first holding member.

8. the first holding member includes a first front wall that holds a front end of the first outer cylindrical portion, a first rear wall that holds a rear end of the first outer cylindrical portion, and a first side wall that connects the first front wall and the first rear wall, 6. The vehicle seat according to claim 5, wherein the second retaining member has a second front wall that retains a front end of the second outer cylindrical portion, a second rear wall that retains a rear end of the second outer cylindrical portion, and a second side wall that connects the second front wall and the second rear wall.

9. the base member has a first frame, a first padding material that covers the first frame, a first skin that covers the first padding material, and a first skin attaching portion that is connected to a tip end of the first skin and that attaches the first skin to the first frame; the rotating member has a second frame, a second padding material that covers the second frame, a second skin that covers the second padding material, and a second skin attaching portion that is connected to a tip end of the second skin and that attaches the second skin to the second frame, the first holding member is attached to the first frame, a first mounting portion into which the first skin mounting portion is inserted is formed between the first holding member and the first frame; the second holding member is attached to the second frame, The vehicle seat according to claim 8, wherein a second mounting portion into which the second skin mounting portion is inserted is formed between the second holding member and the second frame.

10. the rotating member is switchable between a normal position in which a support surface for supporting the arms of a seated occupant faces upward and a rotated position in which the support surface faces a seat width direction by rotating with respect to the base member, 2. The vehicle seat according to claim 1, wherein the position of the shaft is offset in the up-down direction from the center position of the armrest when viewed from the extending direction of the armrest.

Images