Vehicle seat

Abstract

This vehicle seat is provided with a movable member (20) that is provided so as to be capable of pivoting with respect to a vehicle body. The movable member is provided with a load transmitting portion (23) that transmits a load acting on the vehicle seat to the vehicle body, wherein: the vehicle body is provided with a load receiving portion (34) that receives the load transmitted via the load transmitting portion when the vehicle experiences a collision; and the load receiving portion is disposed in a region that does not intersect the pivot path of the load transmitting portion when the movable member pivots.

Description

Vehicle seat

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

[0002] Conventionally, a vehicle seat has been known that prevents the seat from deforming due to inertial forces generated when an impact acts on the vehicle (see, for example, Patent Document 1). The seat described in Patent Document 1 includes a skeletal member extending laterally from the lower end of the seat frame, and a buckle of the seat belt is attached to the skeletal member. The skeletal member has a lower panel that is connected to the vehicle floor by the load from the seat belt during a vehicle collision, thereby suppressing the deformation of the entire seat so as to lift up.

[0003] Japanese Unexamined Patent Application Publication No. 2021-112996

[0004] However, if a skeletal member extending laterally from the lower end of the seat frame is provided as in the seat described in Patent Document 1 above, the position of the skeletal member changes as the seat rotates (for example, folds), and the skeletal member may interfere with other components.

[0005] One aspect of the present invention is a vehicle seat including a movable member provided rotatably with respect to a vehicle body, the movable member being provided with a load transmission portion that transmits a load acting on the vehicle seat to the vehicle body, the vehicle body being provided with a load receiving portion that receives the load transmitted through the load transmission portion during a vehicle collision, and the load receiving portion being disposed in a region that does not intersect the rotation locus of the load transmission portion when the movable member rotates. According to such a configuration, since the load transmission portion does not interfere with the load receiving portion when the movable member rotates, when an impact acts on the vehicle, the load from the movable member can be favorably transmitted to the load receiving portion through the load transmission portion.

[0006] The vehicle seat further includes a holding portion that holds the movable member in a first position where an occupant sits, the movable member being provided rotatably from the first position to a second position different from the first position, and the load transmission portion is preferably provided so as to be able to abut against the load receiving portion while the movable member is held by the holding portion. Thereby, during a vehicle collision, the displacement of the movable member can be favorably suppressed by the load receiving portion.

[0007] Preferably, the vehicle body is provided with a support bracket that rotatably supports a movable member via a rotating shaft extending in the seat width direction, and preferably the load-bearing portion is provided on the support bracket and extends substantially parallel to the rotating shaft. This allows the load-bearing portion to be efficiently arranged in a narrow space.

[0008] The load-receiving portion is preferably provided to protrude inward from the support bracket in the seat width direction, and the tip of the load-receiving portion is preferably located outward in the seat width direction than the inner end of the load-transmission portion in the seat width direction. This reduces the amount of inward protrusion of the load-receiving portion in the seat width direction, allowing the load-receiving portion to be positioned without obstructing the occupant's seating area.

[0009] The movable member is provided to rotate forward from a first position to a second position, and the load-bearing portion is preferably positioned behind the axis of rotation. This allows the load-bearing portion to be positioned without obstructing the occupant's seating area.

[0010] The load-receiving portion is preferably positioned between the inner end face in the sheet width direction and the outer end face in the sheet width direction of the load-transmitting portion. This allows the load-receiving portion to be compactly positioned within the range of the load-transmitting portion.

[0011] It is preferable that the load-receiving section be positioned forward of the rear end of the load-transmitting section. This allows the load-receiving section to be compactly positioned in the area that overlaps with the load-transmitting section when viewed from the side.

[0012] Preferably, the load transmission section includes a first plate portion extending in a direction substantially perpendicular to the sheet width direction and fixed to the rotation axis, and a second plate portion extending from the edge of the first plate portion in the sheet width direction and provided to be able to contact the load receiving portion when a vehicle collides with it. This ensures that the load is reliably transmitted to the load receiving portion via the plate portion when a vehicle collides with it.

[0013] The second plate portion is preferably composed of a flange portion provided along the periphery of the first plate portion. This allows the load to be effectively transmitted to the load-receiving portion via the high-strength flange portion.

[0014] The vehicle seat further includes an airbag module located on the side of the seating area, and preferably the load-bearing portion is positioned below the lower end of the airbag module. This prevents the deployment of the airbag module from being hindered by the load-bearing portion during a vehicle collision.

[0015] The load-bearing portion is preferably provided protruding from the airbag module on the side opposite to the seat width direction. This allows the airbag module to be easily positioned without interfering with the load-bearing portion. Furthermore, it prevents the deployment of the airbag module from being hindered by the load-bearing portion during a vehicle collision.

[0016] The vehicle seat further comprises a frame and a garnish attached to the frame. The frame has a frame body and a mounting part attached to the frame body to which the garnish can be attached. The mounting part includes a bent wire, and the garnish has a first garnish and a second garnish that are fitted into the mounting part from the front and rear and engage with each other. The wire is positioned such that its outer circumference is surrounded by the space formed by the engagement of the first and second garnishes. This prevents the garnish from falling off the wire.

[0017] According to the present invention, since the load transmission part does not interfere with the load receiving part when the movable member rotates, the load from the movable member can be effectively transmitted to the load receiving part via the load transmission part when an impact acts on the vehicle. According to the present invention, the vehicle seat further comprises a holding part that holds the movable member in a first position where the occupant is seated, the movable member is rotatably provided to move from the first position to a second position different from the first position, and the load transmission part is provided so as to be able to contact the load receiving part while the movable member is held by the holding part, so that the displacement of the movable member can be effectively suppressed by the load receiving part in the event of a collision with the vehicle. According to the present invention, it is preferable that a support bracket is provided that rotatably supports the movable member via a rotation axis extending in the seat width direction, and the load receiving part is provided on the support bracket and extends substantially parallel to the rotation axis, so that the load receiving part can be efficiently arranged in a narrow space. According to the present invention, the load-receiving portion is provided to protrude inward from the support bracket in the seat width direction, and the tip of the load-receiving portion is located outward in the seat width direction from the inner end of the load-transmission portion in the seat width direction. Therefore, the amount of inward protrusion of the load-receiving portion in the seat width direction is suppressed, and the load-receiving portion can be positioned without obstructing the occupant's seating area. According to the present invention, the movable member is provided to rotate forward from a first position to a second position, and the load-receiving portion is positioned behind the axis of rotation. Therefore, the load-receiving portion can be positioned without obstructing the occupant's seating area. According to the present invention, the load-receiving portion is positioned between the inner end face and the outer end face in the seat width direction of the load-transmission portion. Therefore, the load-receiving portion can be compactly positioned within the range of the load-transmission portion. According to the present invention, the load-receiving portion is positioned in front of the rear end of the load-transmission portion. Therefore, the load-receiving portion can be compactly positioned in the area that overlaps with the load-transmission portion in a side view. According to the present invention, the load transmission section has a first plate portion that extends in a direction substantially perpendicular to the sheet width direction and is fixed to the rotation axis, and a second plate portion that extends from the edge of the first plate portion in the sheet width direction and is provided so as to be able to contact the load receiving section when a vehicle collides with it. Therefore, when a vehicle collides with it, the load can be reliably transmitted to the load receiving section via the plate portion.According to the present invention, the second plate portion is composed of a flange portion provided along the periphery of the first plate portion, so that the load can be effectively transmitted to the load-receiving portion via the high-strength flange portion. According to the present invention, the vehicle seat further comprises an airbag module provided on the side of its seating portion, and the load-receiving portion is positioned below the lower end of the airbag module, so that the deployment of the airbag module is prevented from being hindered by the load-receiving portion in the event of a vehicle collision. According to the present invention, the load-receiving portion is provided protruding from the airbag module on the opposite side in the seat width direction, so that the airbag module can be easily positioned without interfering with the load-receiving portion. Furthermore, the deployment of the airbag module is prevented from being hindered by the load-receiving portion in the event of a vehicle collision. According to the present invention, the frame portion includes a frame body and a mounting portion attached to the frame body to which a garnish can be attached. The mounting portion includes a bent wire, and the garnish has a first garnish and a second garnish that are fitted into the mounting portion from the front and rear and engage with each other. The wire is positioned such that its outer circumference is surrounded by the space formed by the engagement of the first garnish and the second garnish, thus preventing the garnish from falling off the wire.

[0018] A perspective view showing the schematic configuration of a vehicle seat according to an embodiment of the present invention. A schematic front view showing the configuration of the right seat back of the vehicle seat in Figure 1. A side view showing the schematic configuration of the vehicle seat in Figure 1. A perspective view showing the configuration of the support part that supports the right seat back in Figure 2. An exploded perspective view showing the configuration of the support part that supports the right seat back in Figure 2. View VI of arrow in Figure 4. View VII of arrow in Figure 4. A cross-sectional view along line VIII-VIII in Figure 4. View IX of arrow in Figure 4. A front view showing the schematic configuration of the vehicle seat in Figure 1. A front view of a vehicle seat according to another embodiment of the present invention. A perspective view of the seat with the upholstery material, seat back pad, and garnish removed from the seat back in Figure 11. An exploded perspective view of the seat with the upholstery material and seat back pad removed from the seat back in Figure 11. A perspective view of the reinforcing plate that reinforces the frame body, viewed from the rear. A perspective view of the headrest holding part and garnish mounting part. A perspective view of the surface grille that constitutes the garnish, viewed from the rear. A perspective view of the grille guide, which makes up the garnish, seen from the front. A perspective view of the grille guide in Figure 17A, seen from the rear. A perspective view of the inner garnish, which makes up the garnish, seen from the front. A perspective view of the inner garnish in Figure 8A, seen from the rear. A front view showing the speaker system fixed to the seat back frame and the configuration of its surrounding parts. A view from above of the first extension of the rear casing that fixes the speaker device. An enlarged view of the first extension shown in Figure 20A. A cross-sectional view showing the state in which the grille guide and the outer grille are being attached to the inner garnish. A cross-sectional view showing the state after the grille guide and outer grille have been attached to the inner garnish.

[0019] Embodiments of the present invention will be described below with reference to Figures 1 to 10. The vehicle seat according to the embodiment of the present invention can be applied to various vehicles. Below, an example of applying the vehicle seat to a vehicle as a vehicle seat will be described. The vehicle seat may sometimes be simply referred to as a seat.

[0020] Figure 1 is a perspective view showing the schematic configuration of a vehicle seat 100 according to an embodiment of the present invention. This seat 100 is a rear seat of a vehicle, and a luggage compartment is provided behind the rear seat. In the following, the front-rear direction (length direction), left-right direction (width direction), and up-down direction (height direction) are defined according to the vehicle as shown in the figure, and the configuration of each part will be described according to these definitions.

[0021] As shown in Figure 1, the seat 100 has a left seat section 100L, a center seat section 100C, and a right seat section 100R, and is configured to allow three occupants to sit in the left-right direction. The left seat section 100L, the center seat section 100C, and the right seat section 100R each have a seat cushion 1 that supports the occupant's buttocks, a seat back 2 that supports the occupant's back, and a headrest 3 that supports the occupant's head.

[0022] The seat cushion 1 extends in the front-to-back and left-to-right directions, that is, it extends in a substantially horizontal direction, and has a substantially rectangular shape in plan view. The seat cushion 1 has a seat cushion frame 10 that forms the skeleton of the seat cushion 1. Detailed illustrations are omitted, but the seat cushion frame 10 has, for example, a pair of left and right vertical frames that extend in the front-to-back direction, and a pair of front and rear horizontal frames that extend in the left-to-right direction from the left end of the left seat portion 100L to the right end of the right seat portion 100R, connecting the front ends and rear ends of the pair of left and right vertical frames, respectively, and the whole has a substantially rectangular frame shape in plan view.

[0023] A roughly plate-shaped pressure-receiving member (not shown) is positioned inside the seat cushion frame 10. An elastic cushion pad 11, made of, for example, urethane foam, is provided around the seat cushion frame 10, and the surface of the cushion pad 11 is covered with a skin 12. The seat cushion 1 is provided without being divided in the left-right direction.

[0024] On the other hand, the seat back 2 is divided into a right seat back 2R and a left seat back 2L. The right seat back 2R is longer in the left-right direction than the left seat back 2L, and the seat back 2 for the right seat portion 100R and the seat back 2 for the center seat portion 100C are provided on the right seat back 2R. The ratio of the left-right lengths of the seat backs 2R and 2L is a predetermined ratio (for example, 7:3). Hereafter, the right seat back 2R and the seat cushion 1, and the left seat back 2L and the seat cushion 1 will be treated as separate vehicle seats (seats) 100. That is, not only will the entire rear seat be referred to as a vehicle seat 100, but a part of the rear seat will also be referred to as a vehicle seat 100.

[0025] The right seat back 2R and the left seat back 2L have the same or similar configuration, except that their lengths in the left-right direction are different. The right seat back 2R and the left seat back 2L are sometimes simply referred to as seat back 2. The seat back 2 has a seat back frame 20 that forms the skeleton of the seat back 2. Detailed illustrations are omitted, but the seat back frame 20 is formed in a substantially rectangular plate shape that extends in the vertical, horizontal, and vertical directions, for example. An elastic back pad 21 made of, for example, urethane foam material is provided around the seat back frame 20, and the surface of the back pad 21 is covered with a skin 22.

[0026] Retaining members 4 (also called bolsters) are provided on the left and right outer sides of the seat back 2, that is, on the right side of the right seat back 2R and on the left side of the left seat back 2L. The retaining members 4 protrude forward from the front surface of the seat back 2. The retaining members 4 hold the sides of the occupant and suppress lateral movement of the occupant.

[0027] The retaining member 4 is fixed to the vehicle body frame 101 (Figure 2). Therefore, when a component is fixed to the retaining member 4, that component is supported or fixed to the vehicle body frame 101 via the retaining member 4. Taking this into consideration, in the following, when a component is supported to the vehicle body frame 101 via the retaining member 4, it may be simply described as being supported by the vehicle body frame 101 or fixed to the vehicle body frame 101.

[0028] In the following, the left-right outer side of each seat back 2R, 2L will be referred to as the seat width outer side, and the left-right inner side will be referred to as the seat width inner side. The seat width outer side is the side away from the width center of each seat back 2R, 2L, and the seat width inner side is the side closer to the width center of each seat back 2R, 2L. Mounting brackets 23 are provided at both left-right ends of the lower end of the seat back frame 20. The mounting brackets 23 constitute a support part SP1 that rotatably supports the seat back 2.

[0029] Figure 2 is a schematic front view showing the configuration of the right seat back 2R. Although not shown in the figure, the left seat back 2L is configured to be roughly symmetrical to the right seat back 2R. As shown in Figure 2, support parts SP1 are provided at the lower end and both left and right ends of the right seat back 2R. The support part SP1 has a support bracket 30 positioned on the outside of the mounting bracket 23 in the seat width direction, facing the mounting bracket 23. The mounting bracket 23 is rotatably supported by the support bracket 30 via a rotating shaft 31 that extends in the left-right direction.

[0030] The support bracket 0 is fixed to the vehicle body frame 101. Therefore, the seat back 2 is supported on the vehicle body frame 101 so as to be rotatable in the front-rear direction via the mounting bracket 23 and the support bracket 30. In other words, the seat back frame 20 is supported independently of the seat cushion frame 10 (Figure 1).

[0031] The seat 100 is equipped with a seat belt 40 (seat belt assembly). The seat belt 40 in the right seat 100R is a three-point seat belt that secures the occupant's right shoulder and both sides of their waist. Similarly, the seat belt 40 in the center seat 100C is also a three-point seat belt that secures the occupant's right shoulder and both sides of their waist. Figure 2 shows the seat belt 40 in use.

[0032] First, the configuration of the seat belt 40 for the right seat will be described. The seat belt 40 has a strap 41 (also called webbing) made of, for example, polyester in a strip shape. An anchorage (not shown) is attached to the vehicle frame 101 to the right of the lower end of the right seat back 2R. One end of the strap 41 is fixed to the anchorage. A strap guide 42 is provided to the right of the upper end of the right seat back 2R, and a retractor 43 is provided below the strap guide 42. The strap guide 42 and the retractor 43 are fixed to the vehicle frame 101 (for example, a retaining member 4). The vehicle frame 101 includes the retaining member 4 as described above. Either the strap guide 42 or the retractor 43 (for example, the strap guide 42) or both may be fixed to the right end of the seat 100.

[0033] The other end of the strap 41 is connected to the retractor 43 via the strap guide 42. The retractor 43 has a built-in spring and is configured to retract the strap 41 by spring force. Under normal circumstances, the strap 41 can be pulled out from the retractor 43 against the spring force, thereby putting the seat belt 40 into use. On the other hand, the retractor 43 locks when it detects an impact, preventing the strap 41 from being pulled out.

[0034] A slip guide (not shown) is provided on the strap 41 so as to be slidable along the strap 41, and a tongue is integrally attached to the slip guide. A buckle 44 is provided on the lower left end of the right seat section. The buckle 44 is supported by the seat back frame 20 or the vehicle frame 101. When the tongue is inserted into the buckle 44, the tongue is locked, and the seat belt 40 is put into use. The buckle 44 is provided with a release mechanism. When the release mechanism is operated, the lock is released, and the tongue can be detached from the buckle 44.

[0035] The seat belt 40 of the center seat 100C is supported in a manner similar to that of the seat belt 40 of the right seat 100R. However, unlike the seat belt 40 of the right seat 100R, the right shoulder of the seat belt 40 of the center seat 100C is equipped with a retractor 43 instead of a strap guide 42. This retractor 43 is fixed to the seat back frame 20, not the vehicle body frame 101.

[0036] The seat back 2 is equipped with electrical components 15. These electrical components 15 are, for example, speaker units located on the top of the seat back 2. The electrical components 15 are fixed to the seat back frame 20 and covered by the back pad 21. Although not shown in the illustration, the seat back frame 20 is constructed sturdily by joining multiple plate members to prevent deformation due to impacts from the rear. Furthermore, the seat back 2 is equipped with electrical components 15. As a result, the seat back 2 tends to become heavier.

[0037] Figure 3 is a side view (viewed from the right) showing the schematic configuration of the seat 100. Part of Figure 3 (part A) is shown as a cross-sectional view. As shown in Figure 3, a spiral spring 238 is provided around the pivot axis 31 at the lower end of the seat back 2 (see Figure 7). The seat back 2 is constantly biased forward by the spiral spring 238. As shown in part A of Figure 3, a locking mechanism 45 is provided on the rear surface of the seat back 2 to lock the seat back 2 in a usable position where an occupant can sit. The locking mechanism 45 includes a latch 451 attached to the seat back frame 20 (not shown in Figure 3), a striker 452 fixed to the vehicle body frame 101 and provided to engage with the latch 451, and a lever 453 for operating the latch 451.

[0038] Lever 453 is mounted on the upper end of the seat back 2 so as to be movable upward. Latch 451 is connected to lever 453 via wire 454. Initially, latch 451 is biased to the locked position by a spring (not shown). This causes striker 452 to engage with latch 451, fixing seat back 2 in the use position shown in Figure 3. When lever 453 is operated upward, latch 451 is pulled via wire 454 and moves (e.g., rotates) against the biasing force of the spring to the unlocked position. This releases the locking mechanism 45, and seat back 2 rotates forward due to the biasing force of the spiral spring 238 to the non-use position. As a result, the posture of seat back 2 changes from an upright position to a horizontal position approximately parallel to seat cushion 1.

[0039] Incidentally, as mentioned above, the seat back 2 is equipped with electrical components 15 (Figure 2), and the seat back 2 is constructed to be robust. For this reason, the seat back 2 tends to become heavier, and a relatively large gravitational force F1 constantly acts on the seat back 2. Now, let's consider a scenario where an occupant is seated in the seat 100, and an obstacle collides with the vehicle from the front. When an obstacle collides with the vehicle, an impact load F2 acts on the seat back 2 as an inertial force, pushing it forward.

[0040] At this time, the seatback 2 is prevented from rotating forward by the locking mechanism 45. As a result, a downward-sloping load F3 acts on the support SP1 due to the resultant force of gravity F1 and impact load F2, and the seatback 2 is displaced downward-sloping while maintaining the engagement state by the locking mechanism 45. In this case, if an occupant is seated in the center seat 100C, the occupant's inertial force during a vehicle collision acts on the left side of the seatback 2 via the seat belt 40. As a result, the impact load F2 increases, and the amount of downward displacement of the seatback 2 (especially the amount of downward displacement of the right support SP1) becomes even larger.

[0041] As described above, if the seat back 2 is displaced by the impact load during a vehicle collision, there is a risk that the occupant may not be adequately protected. Therefore, in order to effectively suppress the downward displacement of the seat back 2, this embodiment configures the support part SP1 of the vehicle seat 100 as follows.

[0042] FIG. 4 is a perspective view showing the configuration of a support portion SP on the right side of the right seat back 2R that supports the seat back 2, and FIG. 5 is an exploded perspective view. As shown in FIGS. 4 and 5, the support portion SP1 includes a support bracket 30 fixed to a vehicle body frame (not shown) and a mounting bracket 23 rotatably supported by the support bracket 30. The support bracket 30 and the mounting bracket 23 are made of high-strength metal. The mounting bracket 23 is provided integrally with the seat back frame 20.

[0043] The support bracket 30 has a vertical plate portion 301 extending in the vertical and front-rear directions, and a horizontal plate portion 302 that bends and extends leftward (inside the seat width direction) from the lower end portion of the vertical plate portion 301 that slopes upward rearward. A flange portion 303 bent rightward (outside the seat width direction) is provided at the periphery of the vertical plate portion 301, and a flange portion 304 bent rearward or downward is provided at the periphery of the horizontal plate portion 302. The flange portions 303 and 304 are continuously formed along the periphery of the support bracket 30, thereby increasing the rigidity of the support bracket 30.

[0044] FIG. 6 is a side view of the support portion SP1 viewed from the inside in the vehicle width direction (view VI in FIG. 4), and FIG. 7 is a side view of the support portion SP1 viewed from the outside in the vehicle width direction (view VII in FIG. 4). FIG. 7 shows the lower end portion of the seat back 2 and the rear end portion of the seat cushion 1 together. As shown in FIGS. 6 and 7, the vertical plate portion 301 of the support bracket 30 has an upper edge portion 301a that slopes gently downward forward from the central portion in the front-rear direction, and a lower edge portion 301b that slopes rearward from the front end portion of the vertical plate portion 301 at a steeper downward slope than the upper edge portion 301a. Therefore, the inclination angle of the lower edge portion 301b with respect to the horizontal line is larger than the inclination angle of the upper edge portion 301a with respect to the horizontal line. The front end portion 301c connecting the upper edge portion 301a and the lower edge portion 301b has a shape that protrudes forward in a substantially arc shape.

[0045] The horizontal plate portion 302 extends from the lower end of the lower edge portion 301b of the vertical plate portion 301, inclined diagonally toward the rear and upward. The horizontal plate portion 302 is fixed to the vehicle body frame in a state of contact with the vehicle body frame. Therefore, the inclination angle of the horizontal plate portion 302 with respect to the horizontal line is set according to the shape of the vehicle body frame. As shown in Figure 7, the support bracket 30 protrudes rearward from the seat back 2 and is formed to be elongated in the front-rear direction. This increases the area of ​​the horizontal plate portion 302 that contacts the vehicle body frame, and allows the support bracket 30 to be stably fixed to the vehicle body frame.

[0046] Figure 8 is a cross-sectional view along the centerline of the rotation shaft 31 (a cross-sectional view along the line VIII-VIII in Figure 4). As shown in Figures 6 to 8, a substantially circular through hole 300 is opened near the front end 301c of the vertical plate portion 301, penetrating the vertical plate portion 301 in the left-right direction. The front end 301c is formed in a substantially arc shape with the through hole 300 as the center. A substantially cylindrical rotation shaft 31 is inserted through the through hole 300 via a washer 36 that abuts against the right side of the support bracket 30 (vertical plate portion 301). In Figure 8, the spiral spring 238 (Figure 3) around the rotation shaft 321 is shown by a dashed line.

[0047] A substantially circular through hole 34a is opened in the vertical plate portion 301, behind and below the rotating shaft 31, and a substantially cylindrical load-receiving pin 34 is fitted into the through hole 34a. The load-receiving pin 34 is made of high-strength metal and is fixed (joined) to the vertical plate portion 301 by welding. The load-receiving pin 34 extends in the left-right direction substantially parallel to the rotating shaft 31 and protrudes a predetermined length to the left from the left surface of the vertical plate portion 301.

[0048] As shown in FIG. 5, in the vertical plate portion 301, a through hole 30a that penetrates the vertical plate portion 301 in the left - right direction is opened behind and above the rotating shaft 31. In the horizontal plate portion 302, a through hole 30b that penetrates the horizontal plate portion 302 in the left - right direction is opened. The support bracket 30 can be fixed to the vehicle body frame by bolts passing through these through holes 30a and 30b. At the upper end portion of the vertical plate portion 301, a claw portion 30c projects upward. As shown in FIGS. 6 and 7, at the left end portion of the horizontal plate portion 302, a claw portion 30d projects downward. When the support bracket 30 is attached, these claw portions 30c and 30d are engaged with an engagement hole (not shown) of the vehicle body frame 101, thereby restricting the position of the support bracket 30.

[0049] As shown in FIG. 4, the mounting bracket 23 has a vertical plate portion 231 extending in the vertical and front - rear directions, and a horizontal plate portion 232 that bends and extends leftward (inside the seat width direction) from the rear end portion of the vertical plate portion 231. As shown in FIG. 5, a flange portion 233 that bends leftward (inside the seat width direction) is provided on the periphery of the vertical plate portion 231. On the periphery (upper edge and lower edge) of the horizontal plate portion 232, a flange portion 234 that bends forward is provided. Therefore, the mounting bracket 23 is surrounded by the flange portions 233 and 234 except for the left end portion, and is formed in a substantially concave shape as a whole.

[0050] In the horizontal plate portion 232, a bulging portion 235 that bulges forward is provided between the upper and lower flange portions 234. A through hole 23a that penetrates the horizontal plate portion 232 in the front - rear direction is opened in the bulging portion 235. The bulging portion 235 extends from the horizontal plate portion 232 to the vertical plate portion 231 via the intersection of the horizontal plate portion 232 and the vertical plate portion 231. As a result, concave groove portions 236 (see FIG. 6) in the left - right direction are extended between the flange portion 234 and the bulging portion 235 at the upper end portion and the lower end portion of the horizontal plate portion 232.

[0051] A support plate 201 is provided at the lower end of the seat back frame 20. The support plate 201 protrudes to the right from the right end of the seat back frame 20. The support plate 201 has a flat plate portion 202 and a substantially cylindrical cylindrical portion 203 formed above and below the plate portion 202. The cylindrical portion 203 extends in the left-right direction corresponding to the groove portion 236, and as shown in Figure 4, the cylindrical portion 203 is housed and held in the groove portion 236.

[0052] As shown in Figure 5, a through hole 201a is opened in the plate portion 202 at a position corresponding to the through hole 23a, and the through hole 202 penetrates the plate portion 202 in the front-rear direction. As shown in Figure 4, the mounting bracket 23 and the support plate 201 are integrally connected via a connecting member 205 inserted through the through holes 23a and 201a. The connecting member 205 is, for example, a bolt. As shown in Figure 5, a through hole 230 is opened near the front end portion 231c of the mounting bracket 23, and the vertical plate portion 231 penetrates in the left-right direction.

[0053] As shown in Figure 8, a roughly cylindrical collar 35 is positioned around the rotating shaft 31. The collar 35 is positioned to the left (inward in the seat width direction) of the support bracket 30 via a washer 37. The left end of the rotating shaft 31 is inserted into the through hole 230 of the mounting bracket 23. More specifically, the left end of the rotating shaft 31 is formed in a stepped shape and has an end face 311 which is a vertical surface extending in the vertical direction, and a projection 312 which protrudes to the left from the end face 311.

[0054] The projection 312 has a roughly hexagonal outer surface, and the through hole 230 also has a roughly hexagonal shape corresponding to the projection 312. The right side of the mounting bracket 23, which is fitted along the projection 312, abuts against the end face 311 of the rotating shaft 31, and in this state, the area around the projection 312 is welded. As a result, the mounting bracket 23 is integrated with the rotating shaft 31, and the rotating shaft 31 and the mounting bracket 23 rotate together with respect to the support bracket 30. The collar 35 is also welded to the mounting bracket 23 and integrated with it.

[0055] Figure 6 shows the seat back 2 (seat back frame 20) in use position P1, where an occupant is seated on the seat back 2, and the seat back 2 in non-use position P2, where the seat back is tilted forward, as indicated by dashed lines. The mounting bracket 23 rotates around the pivot axis 31 as the seat back 2 rotates. When the seat back 2 is in use position P1, the mounting bracket 23 is in its initial position (solid line), and when the seat back 2 is in non-use position P2, the mounting bracket 23 is in a protruding position (dashed line) that extends forward beyond the support bracket 30.

[0056] As shown in Figure 6, in the initial position of the mounting bracket 23 (solid line), the vertical plate portion 231 of the mounting bracket 23 has an upper edge portion 231a that extends forward with a downward slope, and a lower edge portion 231b that extends backward from the front end of the vertical plate portion 231 with a gentler downward slope than the upper edge portion 231a. The angle of inclination of the upper edge portion 231a with respect to the horizontal is greater than the angle of inclination of the lower edge portion 231b with respect to the horizontal. The front end portion 231c that connects the upper edge portion 231a and the lower edge portion 231b is formed in a substantially arc shape that protrudes forward.

[0057] The upper edge portion 231a extends below the upper edge portion 301a of the support bracket 30, substantially parallel to the upper edge portion 301a. The lower edge portion 231b extends above the lower edge portion 301b of the support bracket 30, at a gentler angle than the lower edge portion 301b. The front end portion 231c is located behind the front end portion 301c of the support bracket 30. Therefore, in the initial position of the mounting bracket 23, the entire mounting bracket 23 is located inside the support bracket 30. For this reason, as shown in Figure 7, when the support bracket 30 is viewed from the outside in the seat width direction, the mounting bracket 23 is hidden inside the support bracket 30. However, in the initial position of the mounting bracket 23, a part of the mounting bracket 23 may protrude outside the support bracket 30 in a side view.

[0058] As shown in Figure 6, in the initial position of the mounting bracket 23, the load-receiving pin 34 is located below the lower edge 231b of the mounting bracket 23. Furthermore, the load-receiving pin 34 is located behind the front end 231c and behind the rotation axis 31. Therefore, there is a gap of a predetermined length between the lower edge 231b and the load-receiving pin 34. In the initial position of the mounting bracket 23, the lower edge 231b is closest to the load-receiving pin 34. Then, as the mounting bracket 23 rotates, the lower edge 231b moves away from the load-receiving pin 34. Consequently, the load-receiving pin 34 is located outside the rotation trajectory of the mounting bracket 23.

[0059] Figure 9 is a front view of the support portion SP1 (viewpoint IX in Figure 4). As shown in Figure 9, the load-receiving pin 34 is located inside the region AR1 between the right end face 305 and the left end face 306 of the support bracket 30. The left end face 34b of the load-receiving pin 34 is located to the left of the right end face of the mounting bracket 23 (right end face 233b of the flange portion 233) and to the right of the left end face 233c of the flange portion 233. More specifically, the length from the left end face 34b of the load-receiving pin 34 to the right end face 233b of the flange portion 233 is longer than the length from the left end face 34b to the left end face 233c of the flange portion 233.

[0060] Therefore, as shown in Figure 4, the left end of the load-receiving pin 34 does not protrude to the left of the flange portion 233, but faces the outer circumferential surface of the flange portion 233 for a predetermined length or more in the seat width direction. With this configuration, when the seat back 2 in the position of use is displaced downward during a vehicle collision, the flange portion 233 of the mounting bracket 23 comes into contact with the load-receiving pin 34. This suppresses the downward displacement of the seat back 2, thereby providing good protection for the occupant.

[0061] Figure 10 is a front view showing the schematic configuration of the vehicle seat 100 shown in Figure 1. As shown in Figure 10, the airbag module 46, which is a side airbag unit, is positioned on the left and right outer sides of the seat back 2, inside the retaining members 4 on both the left and right sides of the seat back 2. Although detailed illustrations are omitted, the airbag module 46 is constructed by housing an inflator and the airbag body within a housing.

[0062] The airbag module 46 is positioned on the outer side in the seat width direction and above the support section SP1 (support bracket 30, mounting bracket 23). In other words, the load-receiving pin 34 fixed to the support bracket 30 is positioned below the lower end of the airbag module 46. Furthermore, the direction in which the load-receiving pin 34 protrudes is inward in the seat width direction, and the airbag module 46 is positioned on the opposite side from the side in which the load-receiving pin 34 protrudes. This allows the side airbag to deploy forward and upward without being obstructed by the support section SP1 during a vehicle collision.

[0063] The characteristic operation of the vehicle seat 100 according to this embodiment will now be described. The end of the seat back 2 (mounting bracket 23) is rotatably supported from the vehicle frame 101 via a support bracket 30 and a pivot shaft 31, independently of the seat cushion 1. Therefore, the seat back 2 can rotate between an upright position for use in which an occupant is seated and a horizontal position for non-use when tilted forward. A load-receiving pin 34 is provided on the support bracket 30, but the load-receiving pin 34 is located outside the rotation trajectory of the mounting bracket 23. Therefore, when the seat back 2 rotates, the mounting bracket 23 does not come into contact with the load-receiving pin 34.

[0064] When the front of the vehicle collides with an obstacle (frontal collision) while an occupant is seated in the center seat portion 100C of the seat 100, the seat back 2 is subjected to a forward impact load F2 due to inertia in addition to gravity F1. Even when an occupant is not seated in the center seat portion 100C, a forward impact load acts on the seat back 2 due to its inertia. Therefore, a load F3, which is the resultant force of gravity F1 and impact load F2, acts on the support portion SP1 (Figure 3). At this time, the forward rotation of the seat back 2 is prevented by the locking mechanism 45, so the seat back 2 is displaced downward while maintaining an upright position due to the locking mechanism 45, deforming a part of the support portion SP1.

[0065] As a result, the outer circumferential surface of the flange portion 233 of the mounting bracket 23 comes into contact with the load-receiving pin 34. The flange portion 233 and the load-receiving pin 34 are constructed to be of high strength. Therefore, the flange portion 233 coming into contact with the load-receiving pin 34 can suppress the downward displacement of the seat back 2. As a result, the amount of downward displacement of the seat back 2 is suppressed, and the occupant can be well protected. In other words, in this embodiment, the load from the seat back 2 can be supported by the load-receiving pin 34, which is located at a position separate from the rotation axis 31, and the displacement of the seat back 2 can be well suppressed.

[0066] Even when the seat back 2 is rotated to a horizontal, unused position, a forward impact load F2 due to inertia acts on the seat back 2 during a frontal collision. In this case as well, the load-receiving pin 34 can similarly support the load from the seat back 2. Therefore, the displacement of the seat back 2 can be effectively suppressed not only when the seat back 2 is in use, but also when it is in unused position, thanks to the load-receiving pin 34, which is provided separately from the rotation axis 31.

[0067] This embodiment provides the following advantages and effects: (1) The vehicle seat 100 includes a seat back 2 that is rotatably mounted on the vehicle frame 101 (Figure 1). The seat back 2 is provided with a mounting bracket 23 that transmits the load acting on the seat 100, particularly the load during a frontal collision, to the vehicle frame 101 (Figure 4). The vehicle frame 101 is provided with a support bracket 30 having a load-receiving pin 34 that receives the load transmitted via the mounting bracket 23 during a frontal collision (Figure 4). The load-receiving pin 34 is positioned in a region that does not intersect with the rotational trajectory of the mounting bracket 23 when the seat back 2 rotates (Figure 6).

[0068] As a result, the load-receiving pin 34 does not interfere with other parts when the seat back 2 rotates, allowing the load-receiving pin 34 to fully perform its function of suppressing the displacement of the seat back 2 when an impact is applied to the vehicle. In other words, when the vehicle collides with an obstacle, the mounting bracket 23 comes into contact with the load-receiving pin 34, and the load from the seat back 2 can be effectively received by the load-receiving pin 34. Furthermore, since the position of the load-receiving pin 34 remains unchanged regardless of whether the seat back 2 rotates or not, the load-receiving pin 34 can be easily positioned in the optimal location for suppressing the displacement of the seat back 2.

[0069] (2) The seat 100 further includes a locking mechanism 45 that holds the seat back 2 in the usage position P1 where the occupant is seated (Figure 3). The seat back 2 is rotatably mounted from the usage position P1 to the non-usage position P2 (Figure 6). The mounting bracket 23 is mounted so as to be able to contact the load receiving pin 34 while the seat back 2 is held in place by the locking mechanism 45. As a result, in the event of a vehicle collision, the seat back 2 remains in an upright position while the mounting bracket 23 is displaced downward. As a result, the mounting bracket 23 contacts the load receiving pin 34, and the displacement of the seat back 2 can be effectively suppressed.

[0070] (3) The vehicle frame 101 is provided with a support bracket 30 that rotatably supports the seat back 2 via a rotating shaft 31 that extends in the seat width direction (Figure 4). The load-receiving pin 34 is provided on the support bracket 30 and extends substantially parallel to the rotating shaft 31 (Figure 5). This allows the load-receiving pin 34 to be efficiently positioned in the narrow space below the mounting bracket 23.

[0071] (4) The load-receiving pin 34 protrudes inward from the support bracket 30 in the seat width direction, and the tip of the load-receiving pin 34 is located outward (to the right) in the seat width direction from the left end face 233c on the inside of the flange portion 233 of the mounting bracket 23 (Figure 9). This reduces the amount of inward protrusion of the load-receiving pin 34 in the seat width direction, allowing the load-receiving pin 34 to be positioned well without obstructing the occupant's seating area.

[0072] (5) The seat back 2 is provided to rotate forward from the usage position P1 to the non-usage position P2 (Figure 6). The load-receiving pin 34 is positioned behind the rotation axis 31 (Figure 6). This allows the load-receiving pin 34 to be positioned well without obstructing the occupant's seating area.

[0073] (6) The load-receiving pin 34 is positioned between the left end face 306 on the inside in the sheet width direction and the right end face 305 on the outside in the sheet width direction of the support bracket 30 (Figure 9). This allows the load-receiving pin 34 to be compactly positioned within the range of the support bracket 30.

[0074] (7) The load-receiving pin 34 is positioned in front of the rear end of the support bracket 30 (Figure 6). This allows the load-receiving pin 34 to be compactly positioned in the area that overlaps with the support bracket 30 in a side view.

[0075] (8) The mounting bracket 23 has a vertical plate portion 231 that extends in a direction substantially perpendicular to the seat width direction, i.e., in the front-rear and up-down directions and is fixed to the rotation shaft 31, and a plate portion (flange portion 233) that extends in the seat width direction from the edge of the vertical plate portion 231 and is provided so as to be able to contact the load receiving pin 34 when the vehicle collides (Figure 9). This ensures that the load is reliably transmitted to the load receiving pin 34 via the plate portion when the vehicle collides.

[0076] (9) The plate portion, which is provided so as to be able to contact the load receiving pin 34 when a vehicle collides, is composed of a flange portion 233 provided along the periphery of the vertical plate portion 231 (Figure 5). This allows the load to be transmitted effectively to the load receiving pin 34 via the high-strength flange portion 233.

[0077] (10) The seat 100 further includes an airbag module 46 provided on the side of the seat back 2, which is the seating portion of the seat 100 (Figure 10). The load-receiving pin 34 is positioned below the lower end of the airbag module 46 (Figure 10). This prevents the deployment of the airbag module 46 from being hindered by the support part SP1 such as the load-receiving pin 34 during a vehicle collision.

[0078] (11) The load-receiving pin 34 is provided protruding from the airbag module 46 on the opposite side in the seat width direction (Figure 10). This allows the airbag module 46 to be easily positioned without interfering with the support part SP1 such as the load-receiving pin. In addition, it prevents the deployment of the airbag module 46 from being hindered by the support part SP1 in the event of a vehicle collision.

[0079] The above embodiment can be modified into various forms. Several modifications are described below. In the above embodiment, a mounting bracket 23 is provided on the seat back 2 as a load transmission unit that transmits the load acting on the vehicle seat 100 to the vehicle frame 101 (vehicle body), but the load transmission unit may be provided on a movable member other than the seat back. For example, a seat cushion, armrest, ottoman, headrest, etc. may be used as a movable member. Therefore, the configuration of the load transmission unit is not limited to that described above.

[0080] In the above embodiment, a load-receiving pin 34 is provided on the vehicle frame 101 (vehicle body) as a load-receiving part that receives the load transmitted via the mounting bracket 23 when the vehicle collides. However, the configuration of the load-receiving part is not limited to that described above. That is, the load-receiving part may be made of something other than a pin (for example, a plate member). In the above embodiment, the load-receiving pin 34 is provided below and behind the rotating shaft 31. However, the installation position of the load-receiving part is not limited to that described above, as long as it is provided in a region that does not intersect with the rotational trajectory of the load transmission part.

[0081] In the above embodiment, the seat back 2 is provided to be rotatable from the usage position P1 (first position) where the occupant is seated to the non-usage position P2 (second position) via a locking mechanism 45, but the configuration of the holding part is not limited to that described above. In the above embodiment, a load receiving pin 34 is provided on the support bracket 30, substantially parallel to the rotation axis 31. More specifically, the tip of the load receiving pin 34 is positioned outside in the seat width direction of the inner end face in the seat width direction of the flange portion 233 (load transmission part) of the mounting bracket 23, but it may also be positioned at the same position in the seat width direction as the inner end face in the seat width direction.

[0082] In the above embodiment, the mounting bracket 23 has a vertical plate portion 231 (first plate portion) fixed to the rotating shaft 31 and a flange portion 233 (second plate portion) extending in the seat width direction from the edge of the vertical plate portion 231. However, the second plate portion may be made of something other than the flange portion. In the above embodiment, the airbag module 46 is placed inside the retaining member 4, but the airbag module 46 may also be placed at the seat width end of the seat back 2.

[0083] In the above embodiment, a support part SP1 having a mounting bracket 23 having a load transmission part and a support bracket 30 having a load receiving part was applied to the rear seat of the vehicle, but the support part SP1 can also be applied to the front seat. In the above embodiment, the seat belt 40 (for example, the seat belt 40 of the right seat part 100R) was supported by the vehicle body frame 101, but it may also be supported by the seat frame. In the above embodiment, load receiving pins 34 were provided as load receiving parts on the support parts SP1 on both the left and right sides of the seat back 2, but it is also possible to provide a load receiving part on one support part SP1 in the left-right direction (for example, the right support part SP1 of the right seat back 2R) and omit the load receiving part from the other support part SP1 in the left-right direction.

[0084] Other embodiments of the present invention will be described with reference to Figures 11 to 21B. The vehicle seat described below is a seat in which a garnish and a speaker system (electrical equipment) are integrally attached to the seat back, and can be used as a seat installed in various vehicles such as aircraft, trains, ships, and automobiles. In the following description, as with the above embodiments, an example of a vehicle seat will be described using a seat installed in an automobile, in particular a rear seat (hereinafter simply referred to as a seat) that constitutes the rear seat of an automobile.

[0085] Figure 11 is a front view of a vehicle seat 100A according to another embodiment of the present invention. In Figure 11, only the right seat (right side) of the rear seat, which can seat three people, is shown, and the center seat (center) and left seat (left side) are omitted. Therefore, in the following description, the right seat of the rear seat will be referred to as seat 100A. As shown in Figure 11, seat 100A comprises a seat cushion 1 that supports the occupant's buttocks, a seat back 2 that supports the occupant's upper body (waist and back), and a headrest 9 that supports the occupant's head.

[0086] The seat cushion 1 is constructed by attaching a cushion pad 11 made of a cushioning material such as urethane foam to a seat cushion frame 10 that forms the frame, and then covering the outside with a surface 12 made of synthetic leather or fabric. The seat cushion 1 is supported so as to be slidable in the front-rear direction by a sliding mechanism (not shown) provided on the floor of the vehicle.

[0087] The seat back 2 is constructed by attaching a back pad 21 made of cushioning material such as urethane foam to a seat back frame (frame part) 20 that forms the skeleton, and then covering the outside with a surface 22 made of synthetic leather or fabric. The seat back 2 is rotatably supported by the seat cushion 1 via the pair of left and right support parts SP1 described above. The seat back 2 can change its tilt angle relative to the horizontal line by a reclining mechanism (not shown).

[0088] The seatback 2 includes garnishes 5 provided on both shoulders of the seated occupant, and a speaker system 6 mounted inside the seatback 2 so as to face the garnishes 5. The garnishes 5 constitute the speaker grille of the speaker system 6. The speaker system 6 outputs sound from near both shoulders of the seated occupant via the garnishes 5. The specific configuration of the seatback 2 having the garnishes 5 and speaker system 6 will be described in detail later.

[0089] The headrest 9 does not have a frame that forms a skeleton like the seat cushion 1 or seat back 2. Instead, it is constructed by filling a cushion pad (headrest body) 91 made of cushioning material such as urethane foam inside a surface (headrest body) 92 made of synthetic leather or fabric, and then placing a headrest pillar 90 inside. The headrest 9 is held on the upper part of the seat back 2 via the headrest pillar 90, and in this held state, at least a part of it is positioned to overlap with the garnish 5. In other words, at least a part of the headrest 9 is positioned to overlap with a part of the speaker system 6 when viewed from the front.

[0090] The headrest pillar 90 is formed by bending a metal rod-shaped member and has a pair of legs 90a held by the seat back frame 20 (see Figure 13). The headrest pillar 90 is sandwiched from the front and rear directions by the front headrest cover 93 and the rear headrest cover 94, which abut and engage with each other, and is protected by them (see Figure 12).

[0091] Figure 12 is a perspective view of the seat 100A with the upholstery 22, back pad 21, and garnish 5 removed from the seat back 2, and Figure 13 is an exploded perspective view of the seat 100A with the upholstery 22 and back pad 21 removed from the seat back 2.

[0092] As shown in Figures 12 and 13, the seat back 2 comprises a metal seat back frame 20 that forms the skeleton of the seat back 2, a synthetic resin front plate 24F provided on the front of the seat back frame 20, a synthetic resin back plate 24R provided on the rear of the seat back frame 20, a synthetic resin rear cover 25 provided above the seat back frame 20 and the back plate 24R, a belt retractor 26 that houses the seat belt, a garnish 5 attached to the seat back frame 20, and a speaker system 6 attached to the seat back frame 20 so as to face the garnish 5. In Figure 12, the front plate 24F and the rear cover 25 are not shown.

[0093] The seat back frame 20 comprises a frame body 27, roughly plate-shaped reinforcing plates (reinforcing parts) 28 and 29 that reinforce the frame body 27, a headrest holding part (holding part) 7 attached to the frame body 27 for holding the headrest 9, and a garnish mounting part (mounting part) 8 attached to the frame body 27 and configured to allow the attachment of the garnish 5.

[0094] The frame body 27 is formed in a substantially rectangular plate shape facing the front-rear direction and has a first opening 27a provided in the upper left, a second opening 27b provided in the lower left, a third opening 27c provided in the substantially central part in the left-right direction, and a plurality of ribs (not shown). The frame body 27 is made lighter by providing the substantially rectangular first opening 27a, second opening 27b, and third opening 27c, and is reinforced by providing the plurality of ribs. The plurality of ribs are formed, for example, by forming the frame body 27 into an uneven shape.

[0095] The reinforcing plate 28 is joined to the frame body 27 to the right of the third opening 27c of the frame body 27 and below the speaker system 6, thereby reinforcing the frame body 27.

[0096] Figure 14 is a rearward perspective view of the reinforcing plate 28 that reinforces the frame body 27. As shown in Figure 14, the reinforcing plate 28 has a central plate portion 28a formed in a substantially rectangular plate shape facing the front-rear direction, a first extension portion 28b extending rearward from the left end of the central plate portion 28a in the substantially vertical center, a second extension portion 28c extending rearward from the left end of the central plate portion 28a below the first extension portion 28b, and an extension portion extending rearward from the right end of the central plate portion 28a below the first extension portion 28b and above the second extension portion 28c It has a third extension portion 28d, a fourth extension portion 28e extending rearward from the right end of the central plate portion 28a at approximately the same vertical position as the first extension portion 28b, a fifth extension portion 28f extending to the right from the right end of the central plate portion 28a above the fourth extension portion 28e, a pair of sixth extension portions 28g extending left and right from the left and right ends of the upper end of the central plate portion 28a, and a rib 28h provided between the pair of sixth extension portions 28g.

[0097] The central plate portion 28a has a plurality of joint portions 28a1 (for example, a pair of upper and lower ones) that abut against and are joined to the frame body 27. Each of the plurality of joint portions 28a1 is provided with a through hole, and the central plate portion 28a is joined to the frame body 27 by arc welding or the like through the through hole. Figure 12 shows a plurality of weld beads 28a2 formed on each of the plurality of joint portions 28a1.

[0098] Each of the first extension 28b, the second extension 28c, and the third extension 28d has a support portion (first support portion) 28b1, 28c1, and 28d1 that supports the wiring portion 61 (Figure 12) of the speaker system 6. The support portions 28b1, 28c1, and 28d1 are each provided with a through. As shown in Figure 12, clips 65 that support the wiring portion 61 are locked to the support portions 28b1, 28c1, and 28d1. The clips 65 are locked to the support portions 28b1, 28c1, and 28d1 so that the wiring portion 61 extends in the vertical direction.

[0099] As shown in Figure 14, the fourth extension 28e has a joint 28e1 that is joined to the frame body 27 in a state of contact with it. The joint 28e1 is provided with a through hole, and the fourth extension 28e is joined to the frame body 27 by arc welding or the like through the through hole.

[0100] The fifth extension 28f is provided above the upper joint 28a1 and has a support portion (second support portion) 28f1 that supports the wiring portion 61 of the speaker system 6. The support portion 28f1 has a through hole, and a clip 65 that supports the wiring portion 61 is also attached to the support portion 28f1. The support portions 28b1, 28c1, and 28d1 support the wiring portion 61 that extends in the vertical direction, but the support portion 28f1 supports the wiring portion 61 that extends in a different direction, specifically the wiring portion 61 that extends in the left-right direction. That is, the clip 65 is attached to the support portion 28f1 so that the wiring portion 61 extends in the left-right direction.

[0101] A pair of sixth extensions 28g abut against the frame body 27. Each of the pair of sixth extensions 28g is provided with a fixing portion 28g1 that is fixed to the frame body 27. The fixing portion 28g1 has a through hole, and as shown in Figure 12, the sixth extensions 28g are fixed to the frame body 27 via bolts 39a and nuts that pass through through holes (not shown) formed in the frame body 27. The speaker system 6 is also fixed to the frame body 27 by bolts 39a and nuts via the fixing portion 28g1 of the sixth extensions 28g and through holes (not shown) in the frame body 27.

[0102] The rib 28h is provided protruding from the seating surface side (front). The reinforcing plate 28 has a contact portion 28h1 near the rib 28h, which the lower surface (bottom surface) of the speaker system 6 abuts against when joined to the frame body 27. The contact portion 28h1 is formed in a substantially plate shape and extends in the horizontal direction. By providing the contact portion 28h1, the positioning of the speaker system 6 when fixing the speaker system 6 to the frame body 27 with bolts 39a and nuts becomes easier. Instead of the convex-shaped rib 28h that protrudes forward, beads or flanges may be provided to increase the rigidity of the reinforcing plate 28.

[0103] As shown in Figure 13, the reinforcing plate 29 extends diagonally to the right and downward from below the first opening 27a and above the second opening 27b on the right side of the frame body 27, toward below the third opening 27c located to the right of the first opening 27a, and is joined to the frame body 27. In other words, the reinforcing plate 29 extends diagonally from between the first opening 27a and the second opening 27b, avoiding the third opening 27c, and reinforces the frame body 27.

[0104] The reinforcing plate 29 is formed in a plate shape so as to be able to abut against the frame body 27, and the reinforcing plate 29 is provided with a plurality of joint portions 29a1 that are joined to the frame body 27 while in contact with it. Each of the plurality of joint portions 29a1 is provided with a through hole, and the reinforcing plate 29 is joined to the frame body 27 by arc welding or the like through the through holes. Figure 12 shows a plurality of weld beads 29a2 formed on each of the plurality of joint portions 29a1 by welding. At least a portion of the plurality of joint portions 29a1, that is, the plurality of weld beads 29a2, is provided along the extending direction of the reinforcing plate 29.

[0105] The headrest retaining portion 7 and the garnish mounting portion 8 are attached to the frame body 27 at approximately the center in the left-right direction of the upper end of the frame body 27, so as to overlap each other in the front-rear direction. Specifically, the headrest retaining portion 7 is positioned behind the garnish mounting portion 8, and the support bar 27d (Figure 15), which is joined to the frame body 27, is positioned behind the headrest retaining portion 7. The headrest retaining portion 7 and the garnish mounting portion 8 are attached to the frame body 27 via the support bar 27d. The support bar 27d is formed into a roughly U-shape by bending a rod-shaped member (Figure 15) and is joined to the frame body 27.

[0106] Figure 15 is a perspective view of the headrest retaining portion 7 and the garnish mounting portion 8 viewed from the front at an oblique angle. As shown in Figure 15, the headrest retaining portion 7 comprises a rectangular plate-shaped retaining portion body 70 extending in the left-right direction, a first extension portion 71 extending rearward from the upper end of the retaining portion body 70, a second extension portion 72 extending downward from the lower end of the retaining portion body 70, and a pair of left and right pillar guide portions 73 provided on the front surface of the retaining portion body 70 to support a pair of legs 90a of the headrest pillar 90.

[0107] The main body of the retaining part 70 has fixing parts 70a on both the left and right sides for fixing the speaker system 6. Through holes are provided in the fixing parts 70a, and the speaker system 6 is fixed to the fixing parts 70a of the retaining part 70 using bolts and nuts. The first extension part 71 extends rearward from approximately the center of the retaining part 70 in the left and right directions so as to abut against the upper surface of the support bar 27d, and is joined to the upper surface of the support bar 27d by arc welding or the like. The second extension part 72 is formed so as to abut against the frame body 27 and has fixing parts 72a for fixing to the frame body 27. Through holes are provided in the fixing parts 72a, and the headrest retaining part 7 is fixed to the frame body 27 by bolts and nuts 39b inserted through these through holes and through holes (not shown) provided in the frame body 27. Figure 15 shows weld beads 74 at both ends of the second extension 72 in the left-right direction, and the headrest holding portion 7 is further welded to the frame body 27 at both ends of the second extension 72 in the left-right direction.

[0108] The left and right pair of pillar guide portions 73 are provided approximately in the center of the holding portion body 70 in the left-right direction, spaced a predetermined distance apart from each other in the left-right direction, and are formed in a substantially cylindrical shape so that the left and right pair of leg portions 90a (Figure 13) can be inserted through them. Figure 15 shows a weld bead 75 behind the pillar guide portions 73, and the left and right pair of pillar guide portions 73 are welded to the holding portion body 70.

[0109] The garnish mounting portion 8 comprises a mounting portion body 80 fixed to the headrest holding portion 7, and a pair of left and right wire portions (wires) 81R and 81L. The mounting portion body 80 has a rectangular plate shape extending in the vertical direction and is positioned between a pair of left and right pillar guide portions 73. The mounting portion body 80 has a fixing portion 81 at a position opposite to the fixing portion 72a of the second extension portion 72. The fixing portion 81 is provided with a through hole, and the mounting portion body 80 is fixed to the frame body 27 by bolts and nuts 39b inserted through the fixing portion 72a (through hole) of the second extension portion 72 and a through hole (not shown) of the frame body 27.

[0110] Each of the pair of left and right wire sections 81R and 81L is formed by bending a single wire. One end 82 of each wire section 81R and 81L is welded to the upper part of the mounting body 80, and the other end 83 is welded to approximately the center of the mounting body 80 in the vertical direction. Figure 15 shows the weld beads 87 of the ends 82 and 83 of the wire sections 81R and 81L. Each of the pair of left and right wire sections 81R and 81L has an upper wire 84 that engages with the upper part of the garnish 5, a side wire 85 that engages with the side of the garnish 5, and a lower wire 86 that engages with the lower part of the garnish 5. The upper wire 84 and the lower wire 86 extend in the left-right direction, and the side wire 85 extends in the up-down direction.

[0111] As shown in Figure 13, the front plate 24F is attached to the front of the seat back frame 20. The front plate 24F covers a part of the seat back frame 20 and a part of the components supported by the seat back frame 20, thereby protecting the components. Together with the back pad 21 (Figure 11), the seat back frame 20, and the rear cover 25, the front plate 24F forms the outer shape of the seat back 2.

[0112] The back plate 24R is attached to the back of the seat back frame 20. The back plate 24R covers a portion of the seat back frame 20 and a portion of the components supported by the seat back frame 20, thereby protecting the components. The back plate 24R has an opening 24a facing the first opening 27a of the frame body 27 and a covering portion 24b that covers the second opening 27b of the frame body 27. A portion of the third opening 27c of the frame body 27 is also covered by the back plate 24R. The back plate 24R mitigates impacts acting on the seat back 2 from the rear, for example, from the trunk located behind the seat back 2.

[0113] The rear cover 25 is attached to the upper part of the seat back frame 20 and the back plate 24R. The rear cover 25 covers the upper part of the seat back frame 20 and the back plate 24R, as well as the parts provided on these upper parts, thereby protecting the parts. Specifically, the rear cover 25 covers a portion of the headrest retaining portion 7 and the garnish mounting portion 8. Together with the back pad 21 and the front plate 24F, the rear cover 25 forms the outer shape of the seat back 2.

[0114] The belt retractor 26 is attached to the seat back frame 20 via a retractor protective cover 26a positioned facing the first opening 27a of the frame body 27 and the opening 24a of the back plate 24R. A seat belt (not shown) housed in the belt retractor 26 is routed via a shoulder anchor 26b provided on the upper left side of the seat back frame 20.

[0115] The garnish 5 comprises a synthetic resin surface grille (surface member) 50 that constitutes the surface, a synthetic resin grille guide (second garnish) 51 that engages with the surface grille 500, and a synthetic resin inner garnish (first garnish) 520 that engages with the grille guide 51. The garnish 5 is formed to be attachable to a pair of left and right wire sections 81R and 81L of the garnish mounting section 8. The inner garnish 520 is fitted into the pair of left and right wire sections 81R and 81L from the front. The grille guide 51 and the inner garnish 520 engage with each other by abutting against each other. The surface grille 500 engages with the grille guide 51 by abutting against it.

[0116] Figure 16 is a perspective view of the exterior grille 500 viewed from the rear at an oblique angle. As shown in Figure 16, the exterior grille 500 has a grille body (exterior base) 501 extending in the left-right direction and a frame portion 502 provided on the outer edge of the grille body 501. The grille body 501 is provided so as to cover the left and right pair of wire portions 81R, 81L of the garnish mounting portion 8 and is formed in a mesh shape that penetrates in the front-rear direction. The frame portion 502 is provided along the outer edge of the grille body 501 and has a plurality of projections (exterior fixing portions) 503 that protrude rearward from the back surface (rear side surface) 501R of the grille body 501. The plurality of projections 503 are provided at predetermined intervals, and each of the plurality of projections 503 is provided with a locking claw 504 that can lock the exterior grille 500 to the grille guide 510.

[0117] Figure 17A is a perspective view of the grill guide 510 from the front, and Figure 17B is a perspective view from the rear. As shown in Figures 17A and 17B, the grill guide 510 has an outer shape substantially identical to that of the surface grill 500, and the surface grill 500 is abutted against and engaged with the grill guide 510. Specifically, the grill guide 510 has a guide body 511 that extends in the left-right direction and has substantially the same shape as the grill body 501, and a frame portion 512 provided on the outer edge of the guide body 511. The guide body 511 has a pair of left and right honeycomb portions 513 provided on both sides in the left-right direction. The honeycomb portions 513 are composed of a plurality of honeycombs that penetrate in the front-rear direction and are provided in a position opposite to the speaker unit 62 of the speaker system 6, which will be described later.

[0118] The front surface 511F of the guide body 511 is provided with ribs 514 in a grid pattern, and the guide body 511 abuts against the rear surface 501R of the grill body 501 via the ribs 514. The rear surface (second bottom) 511R of the guide body 511 has a plurality of projections (second vertical wall portions) 515 projecting toward the rear. The plurality of projections 515 include a pair of left and right first projections 515a provided on the upper part of the guide body 511, a pair of left and right second projections 515b provided on both ends in the left-right direction of the guide body, a pair of left and right third projections 515c provided on the lower part of the guide body 511, and a pair of left and right fourth projections 515d provided approximately in the center in the left-right direction of the guide body 511. The first projection 515a, the second projection 515b, the third projection 515c, and the fourth projection 515d are provided with locking claws 516 that can lock the grille guide 51 to the inner garnish 520.

[0119] The frame portion 512 is provided along the outer edge of the guide body 511, and the frame portion 512 is provided with a plurality of through holes 517 through which the plurality of projections 503 of the grill body 501 pass. The plurality of through holes 517 are provided corresponding to the positions of the plurality of projections 503 of the surface grill 500 when the surface grill 500 and the grill guide 51 are facing each other, and the locking claws 504 of the projections 503 that pass through the through holes 517 are locked to the rear surface (back surface) 511R of the guide body 511.

[0120] Figure 18A is a perspective view of the inner garnish 520 from the front, and Figure 18B is a perspective view from the rear. As shown in Figures 18A and 18B, the inner garnish 520 has an outer shape substantially identical to that of the grille guide 510, and the grille guide 510 is abutted against and engaged with the inner garnish 520. Specifically, the inner garnish 520 extends in the left-right direction and has an inner body 521 which is substantially the same shape as the guide body 511, and a frame portion 522 provided on the outer edge of the inner body 521. The inner body 521 has a front surface 521F and a rear surface 521R, and a pair of left and right openings 523 provided on both sides in the left-right direction. The openings 523 face the honeycomb portion 513 of the guide body 511 and also face the speaker unit 62 of the speaker system 6.

[0121] The inner body 521 is provided with multiple through holes 524 through which multiple projections 515 of the guide body 511 pass. Specifically, the multiple through holes 524 include a pair of first through holes 524a through which a pair of first projections 515a of the guide body 511 pass, a pair of second through holes 524b through which a pair of second projections 515b pass, a pair of third through holes 524c through which a pair of third projections 515c pass, and a pair of fourth through holes 524d through which a pair of fourth projections 515d pass. The locking claws 516 of the first projection 515a, second projection 515b, third projection 515c, and fourth projection 515d of the guide body 511 pass through the first through hole 524a, second through hole 524b, third through hole 524c, and fourth through hole 524d, and are locked to the rear surface 521R of the inner body 521, when the grille guide 510 is facing the inner garnish 52.

[0122] The rear surface 521R of the inner body 521 is provided with a plurality of concave portions (first recesses) 525 that are formed in a concave shape when viewed from the vertical or horizontal direction, at positions corresponding to the plurality of through holes 524. The plurality of concave portions 525 include a pair of first concave portions 525a provided at positions corresponding to a pair of first through holes 524a, a pair of second concave portions 525b provided at positions corresponding to a pair of second through holes 524b, and a pair of third concave portions 525c provided at positions corresponding to a pair of third through holes 524c.

[0123] Each of the first concave portion 525a, the second concave portion 525b, and the third concave portion 525c has a bottom portion (first bottom portion) 526 of the rear surface 521R, a vertical wall portion (first vertical wall portion) 527 projecting rearward from the bottom portion 526, and an extension portion (first extension portion) 528 extending substantially perpendicularly from the vertical wall portion 527. The left and right pairs of wire portions 81R and 81L of the garnish mounting portion 8 are arranged in the space enclosed by the bottom portion 526, the vertical wall portion 527, and the extension portion 528. Specifically, the upper wires 84 of the left and right pairs of wire portions 81R and 81L are arranged in the space enclosed by the bottom portion 526, the vertical wall portion 527, and the extension portion 528 of the pair of first concave portions 525a. The side wires 85 of the left and right pair of wire sections 81R and 81L are arranged in the space enclosed by the bottom 526, vertical wall 527, and extension 528 of the pair of second concave sections 525b. The lower wires 86 of the left and right pair of wire sections 81R and 81L are arranged in the space enclosed by the bottom 526, vertical wall 527, and extension 528 of the pair of third concave sections 525c.

[0124] Each of the pair of first concave portions 525a, second concave portion 525b, and third concave portion 525c is provided with a relief portion 529 that is recessed in the thickness direction at its bottom 526. This allows the pair of left and right wire portions 81R and 81L to be easily guided into each of the pair of first concave portions 525a, second concave portion 525b, and third concave portion 525c. The tips of the extensions 528 of each of the pair of first concave portions 525a, second concave portion 525b, and third concave portion 525c are formed to be elastically deformed away from the bottom 526. This allows the pair of left and right wire portions 81R and 81L to be guided into each of the pair of first concave portions 525a, second concave portion 525b, and third concave portion 525c even more easily.

[0125] Figure 19 is a front view showing the configuration of the speaker system 6 fixed to the seat back frame 20. As shown in Figure 19, the speaker system 6 has a pair of left and right speaker systems 6R and 6L with the same configuration. Each of the left and right speaker systems 6R and 6L has a speaker device (electrical component body) 60 and a wiring section 61 connected to the speaker device 60.

[0126] The speaker device 60 includes a speaker unit 62 that outputs sound, a speaker box 63 that supports the speaker unit 62, and a rear casing 64 that fixes the speaker box 63 to the seat back frame 20. A detailed explanation is omitted, but the speaker unit 62 is a typical cone type. The speaker box 63 supports the speaker unit 62 so that it faces the honeycomb portion 513 of the guide body 511 and the opening 523 of the inner body 521, and is formed in a concave shape so as to recess downward and rearward from the support portion of the speaker unit 62 (see Figure 21A). This allows the speaker box 63 to be positioned without impairing the seating comfort of the occupant.

[0127] Each of the left and right rear casings 64 has a casing body 641 joined to the rear surface of the speaker box 63, a first extension 642 extending upward from the upper end of the approximately central part in the left-right direction of the casing body 641, and a pair of left and right second extensions 643 extending downward from the lower ends of both left and right ends of the casing body 641.

[0128] Figure 20A is a plan view of the first extension 642 of the rear casing 64 as seen from above, and Figure 20B is an enlarged view of the first extension 642 of Figure 20A. As shown in Figures 19, 20A, and 20B, the first extension 642 has a first fixing portion 642a. A through hole is provided in the first fixing portion 642a.

[0129] The first fixing portion 642a is provided opposite to the fixing portion 70a (Figure 5) provided on the holding portion body 70 of the headrest holding portion 7. A pair of left and right pillar guide portions 73 are provided on the front surface of the holding portion body 70 of the headrest holding portion 7 (Figure 15). Therefore, the rear casing 64 is fixed to the headrest holding portion 7 via the pair of left and right pillar guide portions 73 and the first fixing portion 642a of the first extension portion 642 which is at substantially the same position in the vertical direction.

[0130] Each of the pair of left and right second extensions 643 has a second fixing portion 643a. The second fixing portion 643a is provided with a through hole, and the pair of second fixing portions 643a are provided opposite to the fixing portions 28g1 (Figure 14) of the pair of sixth extensions 28g provided on the reinforcing plate 28. The lower end of the rear casing 64 is fixed to the frame body 27 and the reinforcing plate 28 via the second fixing portions 643a of the pair of second extensions 643. In other words, the lower end of the rear casing 64 is fixed in a position where the frame body 27 and the reinforcing plate 28 overlap.

[0131] The wiring section 61 is connected to the speaker unit 62 and an amplifier (not shown). The audio signal output from the amplifier is input to the speaker unit 62 via the wiring section 61. As shown in Figure 19, the wiring section 61 extends from below to above the seat back 2 and is fixed to the seat back frame 20 at multiple points via clips 65.

[0132] The wiring section 61 is supported by the reinforcing plate 28 at multiple locations. Specifically, the wiring section 61 is supported via clips 65 so as to extend vertically at the first extension 28b, second extension 28c, and third extension 28d of the reinforcing plate 28. The first extension 28b and the fourth extension 28e are located at approximately the same position in the vertical direction (Figure 14). The wiring section 61 is supported at the same or approximately the same position in the vertical direction as the joint 28e1 of the fourth extension 28e.

[0133] The wiring section 61 is supported via clips 65 so as to extend in the left-right direction at the fifth extension 28f of the reinforcing plate 28. The fifth extension 28f is located above the fourth extension 28e (Figure 14). Therefore, the support portion 28f1 of the fifth extension 28f is located between the joint portion 28e1 of the fourth extension 28e and the speaker device 60. As shown in Figure 14, the joint portion 28e1 of the fourth extension 28e is located between the support portion 28d1 of the third extension 28d and the support portion 28f1 of the fifth extension 28f in the vertical direction, and between the support portion 28b1 of the first extension 28b and the support portion 28d1 of the third extension 28d in the left-right direction.

[0134] The seat back 2, configured as described above, is manufactured as follows. First, the reinforcing plates 28 and 39 are joined to the frame body 27 by welding or other means (Figures 12 and 19). Next, the garnish mounting portion 8 and the headrest holding portion 7 are fixed to the frame body 27 with bolts and nuts 39b and joined by welding (Figure 15). This forms the seat back frame 20.

[0135] Next, the speaker system 6 is attached to the seat back frame 20. First, the lower end of the speaker device 60 is brought into contact with the contact portion 28h1 (Figure 14) formed near the rib 28h of the reinforcing plate 28 to position it. Then, the pair of second extensions 643 of the rear casing 64 are fixed to the fixing portions 28g1 (Figure 14) of the pair of sixth extensions 28g of the reinforcing plate 28 using bolts 39a and nuts (Figure 19). As a result, the speaker device 60 is attached to the seat back frame 20 so as to overlap with the reinforcing plate 28 in the front-rear direction.

[0136] Next, the first extension portion 642 of the rear casing 64 is fixed to the fixing portion 70a (Figure 15) of the headrest holding portion body 70 of the headrest holding portion 7 using bolts and nuts (Figure 19). As a result, the first extension portion 642 of the rear casing 64 is fixed between the left and right pair of second extension portions 643 of the rear casing 64.

[0137] Next, the inner garnish 520 is attached to the left and right pair of wire portions 81R and 81L of the garnish mounting portion 8. Specifically, the left and right pair of wire portions 81R and 81L of the garnish mounting portion 8 are engaged with the space (Figure 8B) enclosed by the bottom portion 526, vertical wall portion 527, and extension portion 528 of the multiple recessed portions 525 of the inner garnish 520 by bending the vertical wall portion 527 and extension portion 528. The bottom portion 526 of the multiple recessed portions 525 of the inner garnish 520 is provided with a relief portion 529, and the tip of the extension portion 528 is formed to bend away from the bottom portion 526. This allows the left and right pair of wire portions 81R and 81L to be easily engaged with the first recessed portion 525a, the second recessed portion 525b, and the third recessed portion 525c.

[0138] Next, the grille guide 510 and the exterior grille 50 are attached to the inner garnish 520. Figure 21A is a cross-sectional view showing the state in which the grille guide 510 and the exterior grille 50 are being attached to the inner garnish 520, and Figure 21B is a cross-sectional view showing the state after the grille guide 510 and the exterior grille 50 have been attached to the inner garnish 520.

[0139] As shown in Figures 21A and 21B, first, a pair of projections 515 formed on the rear surface 511R of the guide body 511 of the grille guide 510 are inserted into a pair of through holes 524 formed in the inner body 521 of the inner garnish 520. This locks the grille guide 510 to the inner garnish 520. At this time, the projections 515 of the grille guide 510 face the concave portion 525 of the inner garnish 520, and the upper wire 84, side wire 85, and lower wire 86 of the left and right pair of wire portions 81R and 81L are arranged surrounded by the concave portion 525 and the projections 515. The projections 515 are formed so as to be spaced apart from the extension portion 528 when the grille guide 510 is locked to the inner garnish 520, thereby suppressing the generation of abnormal noise due to contact between the projections 515 and the extension portion 528.

[0140] Next, the multiple projections 503 of the exterior grille 500 are inserted through the multiple through holes 517 (Figure 17A) of the grille guide 510, and the exterior grille 500 is engaged with the grille guide 510. At this time, the tips of the multiple projections 503 of the exterior grille 500 are located between the rear surface of the grille guide 510 and the front surface of the inner garnish 520. In addition, since the front surface 511F of the guide body 511 of the grille guide 510 is provided with grid-shaped ribs 514 (Figure 17A), the grille body 501 and the guide body 511 come into contact via the ribs 514.

[0141] Next, the belt retractor 26 is attached to the seat back frame 20 via the retractor protection cover 26a (Figure 13). Furthermore, the remaining parts such as the front plate 24F, back plate 24R, and rear cover 25 are attached to the seat back frame 20. Finally, the back pad 21 is attached to the seat back frame 20, and the outer covering 22 is then placed over it to form the seat back 2 (Figure 11).

[0142] Another embodiment of the present invention can provide the following effects: (1) The seat 100A comprises a seat back frame 20 and a garnish 5 attached to the seat back frame 20 (Figure 11). The seat back frame 20 has a frame body 27 and a garnish mounting portion 8 attached to the frame body 27 to which the garnish 5 can be attached (Figure 12). The garnish mounting portion 8 includes a pair of bent left and right wire portions 81R, 81L (Figure 15), and the garnish 5 has a grille guide 510 and an inner garnish 520 that are fitted from the front and rear onto the pair of left and right wire portions 81R, 81L and engage with each other. The pair of left and right wire portions 81R, 81L of the garnish mounting portion 8 are arranged such that their outer circumferences are surrounded in the space formed by the engagement of the grille guide 510 and the inner garnish 520.

[0143] With this configuration, the left and right pair of wire sections 81R and 81L are positioned within a closed cross-sectional structure (a structure in which the opening of the concave section 525 is closed by the projection 515) formed by engaging the grille guide 510 and the inner garnish 520, thereby preventing the garnish 5 from falling off the left and right pair of wire sections 81R and 81L.

[0144] (2) The inner garnish 52 has a bottom portion 526, a vertical wall portion 527 rising from the bottom portion 526, and an extension portion 528 extending from the tip of the vertical wall portion 527 (Figure 18B). The grille guide 510 has a back surface 511R and a projection portion 515 rising from the back surface 511R (Figure 17B). The left and right pair of wire portions 81R and 81L are placed in a concave portion 525 surrounded by the bottom portion 526, the vertical wall portion 527, and the extension portion 528, and their outer periphery is surrounded when the opening of the concave portion 525 is closed by the projection portion 515.

[0145] This configuration makes it possible to form the closed cross-sectional structure described above with the bottom portion 526, vertical wall portion 527, and extension portion 528 of the inner garnish 520 and the projection portion 515 of the grille guide 510, thereby preventing the garnish 5 from falling off the pair of left and right wire portions 81R and 81L.

[0146] (3) A through hole 524 is formed in the bottom portion 526 of the inner garnish 520, through which the projection 515 can pass (Figure 18A), and when the projection 515 passes through the through hole 524, the opening of the concave portion 525 is closed. With this configuration, the closed cross-sectional structure described above can be formed by engaging the inner garnish 520 and the grille guide 510.

[0147] (4) The bottom portion 526 and the extension portion 528 are provided opposite each other, and the tip of the extension portion 528 is open in a direction away from the bottom portion 526. This configuration makes it easier to guide the pair of left and right wire portions 81R, 81L into the pair of first concave portions 525a, 525a, second concave portions 525b, 525b, and third concave portions 525c, 525c, respectively.

[0148] (5) The bottom portion 526 has a relief portion 529 that guides each of the left and right wire portions 81R, 81L to the pair of first recessed portions 525a, 525a, second recessed portions 525b, 525b, and third recessed portions 525c, 525c, respectively (Figure 18B). This configuration makes it easier to guide each of the left and right wire portions 81R, 81L to the pair of first recessed portions 525a, 525a, second recessed portions 525b, 525b, and third recessed portions 525c, 525c, respectively.

[0149] (6) The extension portion 528 is provided so as not to come into contact with the projection portion 515 when the pair of projections 515, 515 have passed through the pair of through holes 524, 524. This configuration prevents the generation of abnormal noise due to contact between the projection portion 515 and the extension portion 528.

[0150] (7) The garnish 5 further comprises a surface grille 500 that abuts against and engages with the grille guide 510 (Figure 16). The surface grille 500 has a grille body 501 and a plurality of projections 503 formed on a frame portion 502 provided on the outer edge of the grille body 501. When the surface grille 500 is engaged with the grille guide 510, the tips of the projections 503 are positioned between the back surface 511R of the grille guide 510 and the front surface 521F of the inner garnish 520. With this configuration, by engaging the surface grille 500 with the grille guide 510 and engaging the grille guide 510 with the inner garnish 520, the tips of the projections 503 of the surface grille 500 are sandwiched between the back surface 511R of the grille guide 510 and the front surface 521F of the inner garnish 520, making it difficult for the surface grille 500 to come off the grille guide 510.

[0151] (8) The grill guide 510 has ribs 514 arranged in a grid pattern on the front surface 511F of the guide body 511 (Figure 17A). This configuration allows the surface grill 500 and the grill guide 510 to be in line contact.

[0152] In the other embodiments described above, a speaker unit was used as the electrical component, but the electrical component is not limited to this. The electrical component may be, for example, a massage device or a microphone device that inputs commands to various equipment in the vehicle via voice, or any other device that can improve the convenience and comfort of the occupants.

[0153] To summarize the other embodiments described above, the vehicle seat comprises a frame and a garnish attached to the frame. The frame comprises a frame body and a mounting portion attached to the frame body to which the garnish can be attached. The mounting portion includes a bent wire, and the garnish comprises a first garnish and a second garnish that are fitted into the mounting portion from the front and rear and engage with each other. The outer circumference of the wire is surrounded by placing the wire of the mounting portion in the space formed by the engagement of the first and second garnishes. The first garnish has a first bottom, a first vertical wall rising from the first bottom, and a first extension extending from the tip of the first vertical wall. The second garnish has a second bottom and a second vertical wall rising from the second bottom. The wire is placed in a first recess surrounded by the first bottom, the first vertical wall, and the first extension, and its outer circumference is enclosed when the opening of the first recess is closed by the second vertical wall. The first bottom of the first garnish has a first through-hole that can penetrate the second vertical wall, and the opening of the first recess is closed when the second vertical wall penetrates the first through-hole. The first bottom and the first extension are provided opposite each other, and the tip of the first extension opens away from the first bottom. The first bottom has a relief portion that guides the wire into the first recess. The second vertical wall portion is provided in such a way that it does not come into contact with the first extension portion when the second vertical wall portion has passed through the first through hole. The garnish further comprises a covering member that abuts against and engages with the second garnish. The covering member has a covering base portion and a covering fixing portion formed on the outer edge of the covering base portion, and when the covering member is engaged with the second garnish, at least a part of the covering fixing portion is positioned between the first bottom portion and the second bottom portion. The second garnish has a plurality of projections that protrude from the second bottom portion toward the covering member.

[0154] The above describes an example of applying the vehicle seats 100 and 100A to a vehicle, but the vehicle seats of the present invention can be applied not only to vehicles but also to other vehicles such as aircraft and ships.

[0155] The above description is merely an example, and the present invention is not limited by the embodiments and modifications described above, as long as the features of the present invention are not impaired. It is also possible to arbitrarily combine one or more of the above embodiments and modifications, and to combine modifications with each other.

[0156] 2 Seat back, 23 Mounting bracket, 30 Support bracket, 31 Rotating shaft, 34 Load receiving pin, 46 Airbag module, 100 Vehicle seat, 101 Vehicle frame, 231 Vertical plate section, 233 Flange section, 233c Left end face, 305 Right end face, 306 Left end face, P1 Usage position, P2 Non-usage position, SP1 Support section

Claims

1. A vehicle seat comprising a movable member rotatably mounted on the vehicle body, wherein the movable member is provided with a load transmission unit that transmits the load acting on the vehicle seat to the vehicle body, the vehicle body is provided with a load receiving unit that receives the load transmitted via the load transmission unit in the event of a collision, and the load receiving unit is positioned in a region that does not intersect with the rotational trajectory of the load transmission unit when the movable member rotates.

2. A vehicle seat according to claim 1, further comprising a holding portion for holding the movable member in a first position in which an occupant is seated, wherein the movable member is rotatably provided to move from the first position to a second position different from the first position, and the load transmission portion is provided so as to be able to contact the load receiving portion while the movable member is held by the holding portion.

3. A vehicle seat according to claim 2, wherein the vehicle body is provided with a support bracket that rotatably supports the movable member via a rotating shaft extending in the seat width direction, and the load-receiving portion is provided on the support bracket and extends substantially parallel to the rotating shaft.

4. A vehicle seat according to claim 3, wherein the load-receiving portion protrudes inward from the support bracket in the seat width direction, and the tip of the load-receiving portion is located outward in the seat width direction from the inner end of the load-transmitting portion in the seat width direction.

5. A vehicle seat according to claim 3, wherein the movable member is provided to rotate forward from the first position to the second position, and the load-receiving portion is positioned behind the rotation axis.

6. A vehicle seat according to claim 5, characterized in that the load-receiving portion is arranged between the inner end face in the seat width direction and the outer end face in the seat width direction of the support bracket.

7. A vehicle seat according to claim 6, characterized in that the load-receiving portion is positioned forward of the rear end of the support bracket.

8. A vehicle seat according to claim 3, wherein the load transmission portion comprises a first plate portion extending in a direction substantially perpendicular to the width direction of the seat and fixed to the rotation axis, and a second plate portion extending from the edge of the first plate portion in the width direction of the seat and provided to be able to contact the load receiving portion when the vehicle collides.

9. A vehicle seat according to claim 8, characterized in that the second plate portion is composed of a flange portion provided along the periphery of the first plate portion.

10. A vehicle seat according to claim 3, further comprising an airbag module provided on the side of the seating portion of the vehicle seat, wherein the load-receiving portion is positioned below the lower end of the airbag module.

11. A vehicle seat according to claim 10, characterized in that the load-receiving portion is provided protruding from the airbag module on the side opposite to the width direction of the seat.

12. A vehicle seat according to claim 1, further comprising a frame portion and a garnish attached to the frame portion, wherein the frame portion has a frame body and a mounting portion attached to the frame body to which the garnish can be attached, the mounting portion includes a bent wire, the garnish has a first garnish and a second garnish that are fitted into the mounting portion from the front and rear and engage with each other, and the wire is arranged such that its outer circumference is surrounded by the space formed by the engagement of the first garnish and the second garnish.

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