JP2014121958A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit interference between a seat belt and a slide rail mechanism thereby realizing smooth operation of the seat belt and the slide rail mechanism and improving the durability of the seat belt.SOLUTION: A vehicle seat includes: a seat cushion (a seat cushion frame F1); a seat back supported by the seat cushion; and a seat belt SB. The seat belt SB includes: a slide rail mechanism 140 which extends along the seat cushion below the seat cushion and supports the seat cushion so that the seat cushion may slide; and a cover member 132 which is disposed between the slide rail mechanism 140 and the seat belt SB located below the seat cushion.

Description

  The present invention relates to a vehicle seat provided with a seat belt.

  Conventionally, a seat in which a seat belt is pulled out from a shoulder of a seat back is known (Patent Document 1). Such a sheet holds a seat belt winding device at an appropriate position of the sheet.

JP-A-4-135949

  By the way, since a vehicle seat may be installed so as to be slidable with respect to the vehicle, the seat belt interferes with the slide rail mechanism during the sliding movement or when the seat belt is pulled out or rewound. As a result, these smooth operations are hindered and the seat belt may be damaged.

Therefore, an object of the present invention is to suppress the interference between the seat belt and the slide rail mechanism, to realize a smooth operation of the seat belt and the slide rail mechanism, and to improve the durability of the seat belt.
Another object of the present invention is to suppress an increase in the number of parts for achieving the above object.

  The present invention for solving the above-described problems is a vehicle seat including a seat cushion, a seat back supported by the seat cushion, and a seat belt, and the seat belt is located under the seat cushion. A slide rail mechanism that extends along the seat cushion and slidably supports the seat cushion; and a cover member disposed between the slide rail mechanism and the seat belt under the seat cushion. It is characterized by that.

  According to such a configuration, the cover member is provided between the seat belt under the seat cushion and the slide rail mechanism, thereby preventing interference between the seat belt and the slide rail mechanism. Therefore, the seat belt and the slide rail mechanism do not interfere when the slide rail mechanism is operated, and the slide rail mechanism and the seat belt do not interfere when the seat belt is pulled out or rewound. That is, it is possible to suppress the interference between the seat belt and the slide rail mechanism, to realize a smooth operation of the seat belt and the slide rail mechanism, and to improve the durability of the seat belt.

  In the vehicle seat described above, it is preferable that a convex portion is formed on a surface of the cover member facing the slide rail mechanism.

  According to such a configuration, even if the cover member and the slide rail mechanism interfere with each other, the slide rail mechanism and the cover member come into contact only at the top of the convex portion, so that the slide rail mechanism can be operated relatively smoothly. it can.

  In the vehicle seat described above, it is preferable that the convex portion extends long along the longitudinal direction of the slide rail mechanism.

  According to such a configuration, even if the slide rail mechanism and the cover member interfere with each other, the slide rail mechanism can be operated smoothly.

  In the vehicle seat described above, a rod-like member that is supported by the rear end portion of the side frame and extends in the left-right direction is further provided, and the seat belt and the cover member under the seat cushion extend long in the front-rear direction, An opening that opens rearward is formed at the rear end of the cover member, and the opening can be engaged with the rod-shaped member.

  According to such a configuration, the rear end of the cover member can be stably supported.

  In this vehicle seat, the seat belt may be wound around the rod-shaped member and drawn upward from below the seat cushion.

  According to such a configuration, the number of components can be reduced by causing the member that guides the seat belt to support the cover member.

  In the vehicle seat described above, it is desirable that a second cover member is provided under the seat belt under the seat cushion.

  Thus, if the second cover member is provided under the seat belt, the seat belt can be further protected.

  In the vehicle seat provided with the second cover member, an opening portion opened rearward is formed at a rear end of the second cover member, and the opening portion engages with the rod-shaped member. It is desirable that

  According to such a configuration, the rear end of the second cover member can be stably supported.

  In the vehicle seat provided with the second cover member, each of the cover member and the second cover member is provided with a fixing portion for attaching the cover member and the second cover member. It can be set as the structure by which the said convex part is provided between the rod-shaped members.

  Thus, by supporting the cover member and the second cover member by the fixing portion on the front side of the convex portion and the rod-like member on the rear side, these are stably supported, and the convex portion of the cover member and the slide rail mechanism are When the interference occurs, the convex portion and the slide rail mechanism can slide stably.

  According to the configuration of the first aspect, it is possible to suppress the interference between the seat belt and the slide rail mechanism to realize a smooth operation of the seat belt and the slide rail mechanism and to improve the durability of the seat belt.

  According to the configuration of the second aspect, even if the cover member and the slide rail mechanism interfere with each other, the slide rail mechanism and the cover member contact only at the top of the convex portion, so that the slide rail mechanism operates relatively smoothly. Can be made.

  According to the structure of Claim 3, even if a slide rail mechanism and a cover member interfere, a slide rail mechanism can be operated smoothly.

  According to the structure of Claim 4, the rear end of a cover member can be supported stably.

  According to the configuration of the fifth aspect, the number of parts can be reduced by causing the member that guides the drawing of the seat belt to support the cover member.

1 is a perspective view of a vehicle seat as a vehicle seat according to an embodiment. It is a perspective view which shows the seat frame of the state which fell the seat back. It is a top view which shows the right side part of a seat cushion frame. It is II sectional drawing (a) of FIG. 3, and II-II sectional drawing (b). It is a side view which shows a transmission mechanism. It is a figure which shows simply the state of the transmission mechanism, each link, and movable member at the time of a reference posture. It is a figure which shows simply the state of a transmission mechanism, each link, and a movable member when a seat back is inclined 81 degrees back with respect to a vertical plane. It is a figure which shows simply the state of a transmission mechanism, each link, and a movable member when a seat back is inclined 33 degrees ahead (-10 degrees with respect to a vertical surface) with respect to a reference | standard attitude | position. It is the figure which looked at the seat frame from diagonally forward. It is the perspective view which looked at the seat cushion frame from the left. It is the perspective view which looked at the seat cushion frame from the right. FIG. 4 is an exploded perspective view (a) of the lower guide and its surroundings, and a broken view (b) of the lower guide and its surroundings. It is the figure which looked at the seat frame concerning a modification from the front diagonally upward.

Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. As shown in FIG. 1, the vehicle seat S is a seat used for a rear seat of an automobile, and mainly includes a seat cushion S1, a seat back S2, and a headrest S3.
A belt guide member 110 that supports the seat belt SB so that the seat belt SB can be pulled out from the guide hole 111 is provided at the right shoulder of the seat back S2 (the right end portion of the upper edge).

  A seat frame F as shown in FIG. 2 is built in the seat cushion S1 and the seat back S2. The seat frame F is mainly composed of a seat cushion frame F1 constituting a frame of the seat cushion S1 and a seat back frame F2 constituting a frame of the seat back S2. The seat cushion S1 is configured by covering a seat cushion frame F1 with a seat cushion pad made of a cushion material such as urethane foam and a skin material made of synthetic leather or fabric, and the seat back S2 is placed on the seat back frame F2. It is configured by covering a seat back pad made of a cushion material and a skin material made of synthetic leather or fabric.

  As shown in FIG. 9, the seat back frame F <b> 2 includes left and right side frames 81, 82 and an upper connecting member 83 as a pipe member that connects the upper ends of the side frames 81, 82. Yes. As shown in FIG. 2, the lower portion of the seat back frame F2 is rotatably supported by the rear portion of the seat cushion frame F1 via a reclining mechanism RL. As a result, the seat back S2 can tilt forward and backward with respect to the seat cushion S1.

  Here, in FIG. 2, a state in which the seat back frame F <b> 2 is tilted most rearward with respect to the seat cushion frame F <b> 1 (rear tilt posture described later) is illustrated. In this specification, front and rear, left and right, and top and bottom are based on an occupant seated on the vehicle seat S in a state where the seat back S2 is not tilted by the reclining mechanism RL (reference state described later).

Next, the seat cushion frame F1 will be described in detail.
As shown in FIGS. 2 to 4, the seat cushion frame F <b> 1 performs left and right side frames 10, a movable member 20 that can move back and forth with respect to the left and right side frames 10, and a tilting operation of the seat back frame F <b> 2. In order to transmit to the movable member 20, the transmission mechanism 30 connected with the movable member 20 and the seat back frame F2 is provided.

  The left and right side frames 10 are metal frames extending in the front-rear direction, and are spaced apart from each other on the left and right. The side frame 10 includes a first side wall portion 11 that forms a side surface of the side frame 10, and a first flange portion 12 that extends inward in the left-right direction from the periphery of the first side wall portion 11. In addition, the front end portion 13 that is a portion on the front end side of the side frame 10 is formed to extend in the front-rear direction, and the rear portion 14 that is a portion on the rear side of the front end portion 13 is the rear end of the front end portion 13. After bending outward from the end in the left-right direction, it is formed to extend rearward. Then, one inner frame 40 (only one is shown) that extends in the front-rear direction and is connected to the side frame 10 is provided inside each of the left and right side frames 10 in the left-right direction.

  The inner frame 40 includes a second side wall portion 41 that forms a side surface of the inner frame 40, and a second flange portion 42 that extends outward from the periphery of the second side wall portion 41 in the left-right direction. And the front end part 43 which is a part of the front end side among the inner frames 40 is formed so as to extend along the front-rear direction, and is directly joined to the front end part 13 of the side frame 10 by welding.

The inner frame 40 has three bent portions 44 that bend so that the rear side is displaced inward in the left-right direction with respect to the front end portion 43. For this reason, the rear end 46 of the inner frame 40 is spaced apart from the side frame 10 in the left-right direction. The rear end 46 is connected to the connection beam 51. Here, the connecting beam 51 is a cylindrical member having a substantially rectangular cross-sectional view extending in the left-right direction, and both ends thereof are joined to the left and right side frames 10.
In addition, the inner frame 40 is a cylindrical connection pipe (connection) that connects the left and right inner frames 40 at a position away from the connection beam 51 at a rear end 45 on the rear side of the rearmost bent portion 44. Member) 53.

  Since the inner frame 40 is connected to the side frame 10 in this way, the side frame 10 can be reinforced by the inner frame 40, so that the rigidity of the side frame 10 can be improved. Further, by disposing the inner frame 40 that reinforces the side frame 10 on the inner side in the left-right direction of the side frame 10, for example, the vehicle seat S can be downsized in the left-right direction compared to a structure in which a reinforcing member is provided on the outer side of the side frame. It is possible.

  Moreover, the inner frame 40 has a three-dimensional shape by having the bent portion 44, and has high rigidity. The left and right inner frames 40 are connected by the connecting beam 51 at the rear end 46 that is close to each other, and the rear end portions 45 that are high in rigidity and close to each other are connected by the connecting pipe 53. The twist is suppressed and the structure has very high rigidity.

  Further, by directly joining the front end portion 13 of the side frame 10 and the front end portion 43 of the inner frame 40, for example, the movement of the transmission mechanism 30 to be described later is compared to a structure in which the side frames and the rear end portions of the inner frame are directly joined. However, since it can be prevented from being obstructed by the joint portion J between the side frame 10 and the inner frame 40, the transmission mechanism 30 can be operated satisfactorily.

  Further, the side frame 10, the inner frame 40, and the connecting beam 51 have a triangular structure in plan view, and thus have high rigidity that is difficult to be deformed in a horizontal plane. In addition, since these members have a plate shape extending in a substantially vertical direction, they are not easily deformed up and down and have high rigidity.

  Further, the joint portion J formed by directly joining the front end portion 13 of the side frame 10 and the front end portion 43 of the inner frame 40 has a closed cross-sectional structure as shown in FIG. Specifically, the joint portion J includes the front end portions of the first side wall portion 11 and the first flange portion 12 of the side frame 10 and the front end portions of the second side wall portion 41 and the second flange portion 42 of the inner frame 40. It is comprised by the side part, and it is comprised so that it may become a closed cross-section structure by joining the front-end side part of the 1st flange part 12, and the front-end side part of the 2nd flange part 42 by welding.

  Thus, by making the junction part J into a closed cross-section structure, the rigidity of the junction part J can be improved, and as a result, the rigidity of the side frame 10 can be improved.

  The left and right joints J provided to the left and right side frames 10 and the left and right inner frames 40 are connected by a cylindrical connecting pipe 52 as an example of a connecting member extending in the left-right direction. Thereby, the twist of the inner frame 40 can be suppressed, the rigidity of the left and right joints J can be further improved, and the rigidity of the side frame 10 can be further improved.

  Also, a bracket 60 that holds the side frame 10 and the inner frame 40 so as to be sandwiched in the left-right direction is joined to the lower side of the side frame 10 and the inner frame 40, specifically, near the rear end of the joint portion J by welding. Yes. The bracket 60 has a plate-like base 61 that extends from the laterally outer side of the side frame 10 to the laterally inner side of the inner frame 40, and extends upward from the front end of the base 61 to sandwich the joint J. The first sandwiching portion 62 and the second sandwiching portion 63 that extends upward from the rear end of the base portion 61 and sandwiches a portion other than the joint portion J are integrally provided.

  As shown in FIG. 4A, the first holding part 62 has a groove 62A having a width substantially the same as the width in the left-right direction of the joint part J, and sandwiches the joint part J in the groove 62A. The left and right edges of the groove 62A and the joint J are welded. Further, as shown in FIG. 4B, the second sandwiching portion 63 has a width that is substantially the same as the length from the outer surface of the rear portion 14 of the side frame 10 in the left-right direction to the inner surface of the rear portion of the inner frame 40 in the left-right direction. 63A, the rear portion 14 of the side frame 10 and the rear portion of the inner frame 40 are sandwiched in the groove 63A, and the left and right edges of the groove 63A are welded to the side frame 10 or the inner frame 40. ing.

  By providing such a bracket 60, the rigidity of the side frame 10 can be further improved. Moreover, since the bracket 60 has the 1st clamping part 62 and the 2nd clamping part 63 integrally, compared with the structure which provides separately the bracket which pinches | interposes parts other than a bracket, for example, and a junction part, for example, the number of parts And the assembly work of the bracket 60 can be facilitated.

  As shown in FIG. 2, the movable member 20 is formed in a substantially U shape that opens forward in plan view, and a pan frame (not shown) is provided thereon. As shown in FIG. 5, the movable member 20 is supported by the left and right front links 71 and rear links 72 that are rotatably provided on the left and right side frames 10, thereby moving the movable member 20 forward and backward. It can be moved and tilted. The front link 71 is formed so as to extend inward from the outer side in the left-right direction of the front end portion 13 of the side frame 10, and one end portion is rotatably connected to the outer side in the left-right direction of the front end portion 13 of the side frame 10. The other end is rotatably connected to the front portion of the movable member 20 (see also FIG. 3).

  Specifically, the front link 71 extends substantially rearward along the outer surface of the side frame 10 from the front-side fixed shaft 71A, which is a connecting shaft to the side frame 10, and then bends inward in the left-right direction. The frame 10 extends inward in the left-right direction and then extends substantially rearward, and the rear end thereof is rotatably connected to the movable member 20 via the front-side movable shaft 71B. By connecting one end of the front link 71 to the outer side in the left-right direction of the side frame 10 in this way, the front link 71 is connected to the connecting pipe 52 compared to a structure in which, for example, one end of the front link is connected to the inside of the inner frame. Since interference can be suppressed, the movable member 20 can be operated satisfactorily.

  The rear link 72 is disposed on the rear side of the front link 71 and on the inner side in the left-right direction of the side frame 10, and one end thereof is rotatably connected to the side frame 10 via the rear side fixed shaft 72A. The end portion is rotatably connected to the rear portion of the movable member 20 via the rear side movable shaft 72B. Specifically, the rear link 72 extends substantially downward from the rear-side fixed shaft 72A, then bends inward in the left-right direction, extends to the side surface of the movable member 20, and then extends substantially downward along the side surface. Is formed.

  More specifically, as shown in FIG. 6, the front link 71 and the rear link 72 described above are such that the front movable shaft 71B is located above the front fixed shaft 71A in the reference posture in which the seat back S2 stands at a predetermined angle. The rear movable shaft 72B is disposed below the rear fixed shaft 72A. Here, the predetermined angle is an angle of the seat back S2 with respect to the vertical plane, and is 23 ° in the present embodiment. 6 to 8, for convenience, a fixed shaft whose position with respect to the side frame 10 does not change according to the tilting operation of the seat back S <b> 2 is indicated by a white circle, and a movable shaft that moves with respect to the side frame 10. Is indicated by a dot.

  By disposing the front link 71 and the rear link 72 in this manner, the seat back S2 is movable in an initial stage until the seatback S2 tilts to the rearward tilted posture (posture in FIG. 7) that is tilted most rearward from the reference posture. The inclination tendency of the member 20 is configured to be a first tendency in which the front end portion rises relative to the rear end portion. That is, in this initial stage, the angle of the movable member 20 with respect to the horizontal plane is gradually increased.

  As a result, the angle between the seat back S2 and the seat cushion S1 can be set to a suitable angle for maintaining a natural posture when the occupant is weak, so that the occupant can have a comfortable rest on the vehicle seat S. It is possible to obtain.

  Since the configuration in which the movable member 20 is tilted as described above is configured only by the front link 71 and the rear link 72, for example, it is simpler than the structure in which the movable member is tilted using three or more members such as a cam member, a roller, and a link. The movable member 20 can be tilted with a simple structure.

  Further, in the present embodiment, the tilting tendency of the movable member 20 from the first tendency described above until the seat back S2 tilts from the reference attitude (FIG. 6) to the rearward tilting attitude (FIG. 7). The front link 71 and the rear link 72 are arranged so as to switch to the second tendency of lowering relative to the rear end. That is, in a later stage until the seat back S2 tilts from the reference posture to the backward tilt posture, the angle of the movable member 20 with respect to the horizontal plane gradually decreases.

  As a result, when the seat back S2 is tilted backward, the movable member 20, the seat back, and S2 can be brought into a substantially flat state, so that the occupant stretches the body on the substantially flat vehicle seat S. It is possible to get a comfortable rest.

  Further, the front-side movable shaft 71B passes through the front-side fixed shaft 71A from the first vertical surface PF1 behind the front-side fixed shaft 71A and through the front-side fixed shaft 71A in the reference posture (FIG. 6). It arrange | positions in the position close | similar to 1st horizontal surface FF1.

  As a result, when the front side movable shaft 71B is rotated forward obliquely upward about the front side fixed shaft 71A, the amount of rise of the front side movable shaft 71B in the first stage (the amount of rise relative to the unit rotation angle). Can be increased. In addition, at the stage after the front side movable shaft 71B becomes closer to the first vertical surface PF1 than the first horizontal plane FF1, the amount of elevation of the front side movable shaft 71B can be suppressed to a small level. Therefore, it is possible to favorably switch the tilting tendency of the movable member 20 from the first tendency to the second tendency.

  The rear movable shaft 72B is closer to the second vertical plane PF2 passing through the rear fixed shaft 72A than the second horizontal surface FF2 passing through the rear fixed shaft 72A in the reference posture (FIG. 6). 2 It is arranged at a position ahead of the vertical plane PF2. Thereby, when the rear side movable shaft 72B is rotated forward and obliquely upward with the rear side fixed shaft 72A as the center, the amount of rise of the rear side movable shaft 72B (the amount of rise relative to the unit rotation angle) in the first stage. Can be kept small. In addition, at the stage after the rear side movable shaft 72B is closer to the second horizontal plane FF2 than to the second vertical surface PF2, the rising amount of the rear side movable shaft 72B can be increased. Therefore, it is possible to favorably switch the tilting tendency of the movable member 20 from the first tendency to the second tendency.

  As shown in FIGS. 2, 3, and 5, the transmission mechanism 30 includes a first transmission link 31, a second transmission link 32, and a third transmission link 33, and includes left and right side frames. One is provided on the inside in the left-right direction. By disposing the transmission mechanism 30 on the inner side in the left-right direction of the side frame 10 in this way, for example, the vehicle seat S can be downsized in the left-right direction compared to a structure in which the transmission mechanism is disposed on the outer side in the left-right direction of the side frame. It is possible.

  In addition, a part of the transmission mechanism 30 (a part other than a part on the front end side of the third transmission link 33) is a rear part 14 of the side frame 10 and a rear part of the inner frame 40 (a part after the joint part J) in the left-right direction. It is arranged between. Thereby, since it can suppress that an object penetrate | invades from the inner side in the left-right direction with respect to a part of transmission mechanism 30 arrange | positioned between the side frame 10 and the inner frame 40, it can operate the transmission mechanism 30 satisfactorily. It is possible.

  The first transmission link 31 is formed so as to extend obliquely forward and downward from the base end portion (near the tilting shaft F21) of the seat back frame F2, and the rear end portion thereof is connected to the seat back frame F2 with the first connecting shaft A1. The front end is connected to the second transmission link 32 via the second connection shaft A2. In other words, the front end portion of the first transmission link 31 is indirectly connected to the movable member 20 via the second connection shaft A2 and the second transmission link 32 and the third transmission link 33 described later. Accordingly, the tilting operation of the seat back frame F <b> 2 is transmitted to the movable member 20 via the first transmission link 31, the second transmission link 32, and the third transmission link 33.

  More specifically, the first connecting shaft A1 is slightly in front of the tilting shaft F21 (center of tilting) in the reference posture (FIG. 6), more specifically, a straight line connecting the tilting shaft F21 and the second connecting shaft A2. It is arranged at a position shifted upward. Then, the first connecting shaft A1, the second connecting shaft A2, and the tilting shaft F21 are in a straight line with a posture in the middle until the seat back S2 reaches the forward leaning posture (FIG. 8) that is tilted most forward from the reference posture. It is configured to line up.

  As a result, the tilting shaft F21, the first connecting shaft A1, and the second connecting shaft A2 are aligned in the middle of the seat back S2 reaching the forward tilting posture from the reference posture, that is, the tilting shaft F21 and the second connecting shaft. Since the first connecting shaft A1 gets over the straight line connecting the axis A2, the moving direction of the movable member 20 can be switched to the reverse direction.

  The second transmission link 32 is a V-shaped link in a side view, and a base portion 32B that is rotatably connected to the side frame 10 via a rotation shaft 32A, and a first arm that extends obliquely downward and rearward from the base portion 32B. It has a portion 32C and a second arm portion 32D extending obliquely rearward and upward from the base portion 32B. The first transmission link 31 is rotatably connected to the distal end portion of the first arm portion 32C via the second connection shaft A2, and the third connection shaft A3 is connected to the distal end portion of the second arm portion 32D. The 3rd transmission link 33 is connected via the via so that rotation is possible. That is, the distal end portion of the first arm portion 32C located at a position away from the rotation center of the second transmission link 32 is an input portion to which the drive amount from the first transmission link 31 is input, The distal end portion of the second arm portion 32D that is away from the rotation center of the transmission link 32 and is located at a position different from the input portion serves as an output portion for transmitting the drive amount to the third transmission link 33. Yes.

  The third transmission link 33 is a link extending in the front-rear direction. The rear end of the third transmission link 33 is rotatably connected to the second transmission link 32 via the third connection shaft A3, and the front end thereof is the front side described above. It is rotatably connected to the front portion of the movable member 20 via the movable shaft 71B. That is, the connecting shaft of the third transmission link 33 with the movable member 20 and the connecting shaft of the front link 71 with the movable member 20 are configured by the same front-side movable shaft 71B. Thereby, for example, the structure can be simplified as compared with a structure in which the third transmission link and the front link are respectively connected to different portions of the movable member.

  As described above, when the transmission mechanism 30 is configured, as shown in FIGS. 6 and 7, when the seat back frame F2 is tilted later from the reference posture, the first transmission link 31 is moved by the seat back frame F2. When pulled rearward and obliquely upward, the second transmission link 32 rotates counterclockwise in the figure, and the third transmission link 33 moves forward. As a result, when the seat back frame F2 is tilted later, a force directed forward from the transmission mechanism 30 to the front portion of the movable member 20 (a force that causes the front link 71) is exerted. The movable member 20 supported by the rear link 72 moves forward, and its tilting tendency is switched from the first tendency to the second tendency by the action of the links 71 and 72.

  As shown in FIGS. 6 and 8, when the seat back frame F2 is tilted forward from the reference posture, the first transmission link 31 is pushed obliquely downward and forward by the seat back frame F2 in the initial stage. The second transmission link 32 rotates clockwise in the figure, and the third transmission link 33 moves rearward. As a result, in the initial stage of the operation of tilting the seat back frame F2 forward from the reference posture, a force acting backward from the transmission mechanism 30 acts on the movable member 20, so that the movable member 20 moves backward while moving the front Due to the action of the link 71 and the rear link 72, the angle with respect to the horizontal plane gradually decreases.

  When the seat back frame F2 is tilted 23 ° forward from the reference posture (0 ° with respect to the vertical plane) (not shown), the first connecting shaft A1, the second connecting shaft A2, and the tilting shaft F21 are Line up on a straight line. As shown in FIG. 8, after the first connecting shaft A1, the second connecting shaft A2, and the tilting shaft F21 are arranged in a straight line (the latter stage of the operation of tilting the seat back frame F2 forward from the reference posture). The first transmission link 31 is pulled rearward and obliquely upward by the seat back frame F2, the second transmission link 32 rotates counterclockwise in the drawing, and the third transmission link 33 moves forward.

  As a result, in a later stage of the operation of tilting the seat back frame F2 forward from the reference posture, a forward force is applied from the transmission mechanism 30 to the movable member 20, so that the movable member 20 moves forward, By the action of the link 71 and the rear link 72, the angle with respect to the horizontal plane gradually increases.

  In this way, the moving direction of the movable member 20 is switched from the rear to the front while the seat back S2 is tilted from the reference posture (FIG. 6) to the forward tilt posture (FIG. 8). Compared to the structure in which the movable member continues to move backward until it tilts to the forward leaning posture, the movable member 20 or the rear end portion of the seat cushion S1 provided on the movable member 20 interferes with the seat back S2. Can be suppressed.

  In the vehicle seat S in which the seat cushion pad moves back and forth and up and down in accordance with the reclining operation of the seat back S2, as shown in FIG. 9, the shoulder opening (the side frame 81 and the upper connecting member) of the seat back frame F2, as shown in FIG. The belt guide member 110 described above is provided on the shoulder (corresponding to 83 connecting portion). The belt guide member 110 is formed with a guide hole 111 as an example of a belt guide through which the seat belt SB passes. Of the side frames 81 and 82 of the seat back frame F2, the right side frame 81 corresponding to the belt guide member 110 is joined to the outer side frame 81A and the inner side frame 81B in order to provide sufficient rigidity. By doing so, it has a closed cross-sectional structure. That is, similarly to the cross section of the joint portion J, the outer side frame 81A and the inner side frame 81B each have a U-shaped cross section, and a closed cross-section structure is configured by joining the U-shaped openings facing each other. On the other hand, the left side frame 82 is formed of only the outer side frame. Therefore, the load received from the seat belt SB can be received by the right side frame 81 with high rigidity, and the cost can be reduced by using only the outer side frame as the left side frame 82.

  Here, the guide hole 111 of the belt guide member 110 is located in a range W in which the left and right side frames 10 and the inner frame 40 are disposed in the left-right direction. In the present embodiment, the entire guide hole 111 is located within the range W in the left-right direction.

  As shown in FIG. 10, the seat belt SB is provided with a tongue 120, and a buckle 121 for anchoring the tongue 120 is fixed to the left side frame 10. As shown in FIG. 11, an anchor 122 that anchors the end of the seat belt SB is fixed to the right side frame 10.

  As shown in FIG. 9, the seat belt SB extends downward through the guide hole 111 of the belt guide member 110. And as shown in FIG. 11, it wraps around under the seat cushion frame F1 from the rear end of the right side portion of the seat cushion frame F1, and extends forward along the seat cushion S1. Under the seat cushion S1, the seat belt SB is guided forward by the lower guide 130 and is wound around a belt winding device (not shown) so that it can be pulled out.

  As shown in FIG. 12A, the lower guide 130 includes a rail member 131 as an example of a second cover member, and a cover member 132.

  The rail member 131 extends horizontally in the front-rear direction, and includes a guide plate 131A positioned below the seat belt SB, a side guide 131B rising from the left and right sides of the guide plate 131A, and a hook portion provided at the rear end of the side guide 131B. 131C and the fixing | fixed part 131F provided in the front-end part of the side guide 131B are comprised. The hook portion 131C is a vertically extending plate-like portion and has an opening 131D that opens rearward. The fixing portion 131F is a horizontally extending plate-like portion and has a mounting hole 131G penetrating vertically. The rail member 131 has a function of protecting the seat belt SB together with the cover member 132 in addition to the function of guiding the seat belt SB by being disposed under the seat belt SB and covering the seat belt SB.

  The cover member 132 extends horizontally in the front-rear direction, and is provided at a main body portion 132A located on the seat belt SB, a side guide 132B extending downward from the left and right sides of the main body portion 132A, and a rear end of the side guide 132B. The hook portion 132C and the fixing portion 132F provided at the front end portion of the main body portion 132A are provided. The hook part 132C is a plate-like part that extends vertically, and has an opening 132D that opens rearward. The fixing portion 132F is a horizontally extending plate-like portion and has a mounting hole 132G penetrating vertically. In the middle of the main body part 132A in the front-rear direction, a left and right convex part 132H protrudes upward.

As shown in FIG. 11, such a lower guide 130 is fixed to a rear bracket 150 and a front bracket 170 as a part of the side frame 10.
The rear bracket 150 is welded to the rear portion of the side frame 10. The front bracket 170 includes an upper bracket 171 and a lower bracket 172. The upper bracket 171 is welded to the side frame 10, and the lower bracket 172 is fixed to the upper bracket 171 by screws.

  As shown in FIG. 12A, the rear bracket 150 includes a front wall portion 151 facing in the front-rear direction and side wall portions 152 extending rearward from both left and right ends of the front wall portion 151, and the side wall portion 152 has a circular shape. A through hole 153 is formed.

  As shown in FIG. 12B, the cover member 132 is covered on the rail member 131, and the seat belt SB is passed through the space between the rail member 131 and the cover member 132. The rail 131 and the cover member 132 are aligned so that the hooks 131C of the rail member 131 and the hook 132C of the cover member 132 overlap with each other. Then, the openings 131D and 132D are aligned with the through holes 153 of the rear bracket 150, and the pin 160 as an example of a rod-shaped member is inserted into the through holes 153 and the openings 131D and 132D, so that the rear portion of the cover member 132 Is supported. The pin 160 functions as a member that guides the seat belt SB that is wound around the seat belt SB and extends in the front-rear direction under the seat cushion frame F1 to the rear side of the seat back frame F2.

As shown in FIG. 11, the fixing portions 131F and 132F are aligned with the lower bracket 172 and are fixed to the lower bracket 172 with screws.
The seat cushion frame F <b> 1 is slidable in the left-right direction when the side frame 10 is supported by the slide rail mechanism 140. Specifically, a horizontal rail 141 extending in the left-right direction is fixed to a slider of a front and rear slide rail mechanism (not shown), and the horizontal slider 142 engaged with the horizontal rail 141 so as to be slidable is fixed to the left and right side frames 10. It is fixed to.

Here, the cover member 132 described above is disposed so as to partially face the slide rail mechanism 140, and the convex portion 132 </ b> H is disposed at a portion facing the slide rail mechanism 140. As described above, the convex portion 132 extends long in the left-right direction, that is, along the longitudinal direction of the slide rail mechanism 140. Thereby, even when the horizontal rail 141 contacts the cover member 132 when the slide rail mechanism 140 is operated, the contact is made only at the top of the convex portion 132H extending in the left-right direction, so that the contact sound can be suppressed and smoothly Can be slid.
The convex portion 132H is provided between the fixing portions 131F and 132F and the pin 160.

According to the vehicle seat S configured as described above, the following effects can be obtained.
As shown in FIG. 3, an inner frame 40 that is connected to the side frame 10 and extends in the front-rear direction is provided inside the pair of side frames 10 of the seat cushion frame F <b> 1, so that the rigidity of the side frame 10 is increased. be able to. Even if a large tensile load is applied to the seat belt SB at the time of a vehicle collision, for example, a large forward and downward force is applied to the guide hole 111 and transmitted to the seat cushion S1, this load is transmitted to the side of the seat cushion S1. The frame 10 and the inner frame 40 can be received. Here, since the guide hole 111 is located in the range W in which the right side frame 10 and the inner frame 40 are arranged in the left-right direction, the load applied from the seat belt SB is reduced by the side frame 10 and the inner frame 40. Therefore, the seat back S2 and the seat cushion S1 are not easily twisted, and the side frame 10 and the inner frame 40 can stably receive the load. Thereby, deformation of the seat cushion frame F1 can be suppressed.

  And since the inner frame 40 has the bending part 44 bent so that a rear side may shift | deviate inside, it has high rigidity and can suppress a deformation | transformation of the seat cushion frame F1 more.

  Further, since the left and right inner frames 40 are connected by the connecting pipe 53 at the rear end portion 45, deformation to the left and right is suppressed, and the rigidity of the inner frame 40 is increased, so that the seat cushion frame F1 is further deformed. Can be suppressed.

  Further, since the left and right inner frames 40 are connected by the connecting pipe 52 at the front end portion (joint portion J), the left and right deformations are suppressed and the rigidity is extremely high. Further, since the left and right side frames 10 and the inner frame 40 are connected by the connecting beam 51 at their rear ends, the left and right deformations are suppressed and the rigidity is extremely high. For this reason, deformation of the seat cushion frame F1 can be further suppressed.

  The cover member 132 is provided between the seat belt SB below the seat cushion S1 and the slide rail mechanism 140, thereby preventing interference between the seat belt SB and the slide rail mechanism 140. For this reason, when the slide rail mechanism 140 is operated, the seat belt SB and the slide rail mechanism 140 do not interfere with each other, and the slide rail mechanism 140 and the seat belt SB are not affected when the seat belt SB is pulled out or rewound. There is no interference. That is, it is possible to suppress the interference between the seat belt SB and the slide rail mechanism 140 to realize the smooth operation of the seat belt SB and the slide rail mechanism 140 and to improve the durability of the seat belt SB.

  Further, the cover member 132 is formed with a convex portion 132H at a portion facing the slide rail mechanism 140, and the convex portion 132H extends along the longitudinal direction of the slide rail mechanism 140. Therefore, the cover member 132 and the slide rail mechanism 140 are formed. Even if they interfere with each other, they slide smoothly, and the slide rail mechanism 140 can be operated smoothly.

  A hook portion 132C having an opening 132D and a hook 131C having an opening 131D are formed at the rear ends of the cover member 132 and the rail member 131, respectively, and are engaged with the rear bracket 150 at the rear end portion of the side frame 10. Since the cover member 132 and the rail member 131 are supported by the openings 132D and 131D engaging with the pin 160, the cover member 132 and the rail member 131 can be stably supported. Moreover, since the pin 160 also serves as a guide for the seat belt SB, the number of parts can be reduced as compared with the case where the guide for the seat belt SB and the member for supporting the cover member 132 are separately configured.

  The cover member 132 and the rail member 131 are supported by the fixing portions 132F and 131F on the front side of the convex portion 132H and the pin 160 on the rear side, so that they are stably supported. When the portion 132H and the slide rail mechanism 140 interfere with each other, the convex portion 132H and the slide rail mechanism 140 can slide stably.

  Although the embodiments of the present invention have been described above, the present invention can be implemented with appropriate modifications as shown in other embodiments below.

  In the embodiment, two inner frames 40 are provided corresponding to the left and right side frames 10, but the inner frame corresponds to at least one of the pair of side frames 10 on which the belt guide is provided. As long as it is provided. For example, in the embodiment, the inner frame 40 may be provided only on the right side, and the left inner frame 40 may not be provided.

  Moreover, in the said embodiment, although the structure which the movable member 20 of the seat cushion frame F1 moves interlockingly with tilting seat back S2 was illustrated, it is not necessary to provide the mechanism for such interlocking. . In this case, the pan frame 90 may be fixed to the side frame 10 and the inner frame 40 as in the example shown in FIG. In this case, since the support body (that is, the side frame 10 and the inner frame 40) of the pan frame 90 can be enlarged, the pan frame 90 is compared with the embodiment in which the pan frame is fixed to the movable member 20. Can be firmly supported. Moreover, since the pan frame 90 connects the left and right side frames 10 and the inner frame 40, the rigidity of the seat cushion frame F1 can be made extremely high.

  In the above embodiment, the entire guide hole 111 is located in the range W in the left-right direction, but only a part of the guide hole 111 may be arranged in the range W in the left-right direction.

  In the said embodiment, although the cylindrical connection pipe 53 was illustrated as a connection member, this invention is not limited to this, For example, a polygonal pipe, a rod-shaped member, etc. may be sufficient.

  In the said embodiment, although the vehicle seat S used by a motor vehicle was illustrated as a vehicle seat, this invention is not limited to this, For example, the sheet | seat used for a ship, an aircraft, etc. It can also be applied to.

DESCRIPTION OF SYMBOLS 10 Side frame 20 Movable member 30 Transmission mechanism 40 Inner frame 43 Front end part 44 Bending part 45 Rear end part 46 Rear end 51 Connection beam 52 Connection pipe 53 Connection pipe 60 Brackets 81 and 82 Side frame 83 Upper connection member 90 Pan frame 110 Belt Guide member 111 Guide hole 120 Tongue 121 Buckle 122 Anchor 130 Lower guide 131 Rail member 131A Guide plate 131C Hook part 131D Open 132 Cover member 132H Convex part 140 Slide rail mechanism 141 Lateral rail 142 Lateral slider 150 Rear bracket 160 Pin 170 Front bracket 171 Upper bracket 172 Lower bracket F Seat frame F1 Seat cushion frame F2 Seat back frame S Vehicle seat S1 Seat cushion S2 seat back SB seat belt

Claims (8)

A vehicle seat comprising a seat cushion, a seat back supported by the seat cushion, and a seat belt,
The seat belt extends along the seat cushion under the seat cushion;
A slide rail mechanism for slidably supporting the seat cushion;
A vehicle seat, comprising: a cover member disposed between the slide rail mechanism and the seat belt under the seat cushion.   The vehicle seat according to claim 1, wherein a convex portion is formed on a surface of the cover member facing the slide rail mechanism.   The vehicle seat according to claim 2, wherein the convex portion extends long along a longitudinal direction of the slide rail mechanism. A rod-like member supported by the rear end of the side frame and extending in the left-right direction;
The seat belt under the seat cushion and the cover member extend long in the front-rear direction,
The vehicle according to claim 2, wherein an opening portion opened rearward is formed at a rear end of the cover member, and the opening portion is engaged with the rod-shaped member. Sheet.   The vehicle seat according to claim 4, wherein the seat belt is wound around the rod-shaped member and is routed upward from below the seat cushion.   The vehicle seat according to claim 4, wherein a second cover member is provided under a seat belt under the seat cushion.   7. The vehicle according to claim 6, wherein an opening that opens rearward is formed at a rear end of the second cover member, and the opening is engaged with the rod-shaped member. Sheet.   The cover member and the second cover member are each provided with a fixing portion for attaching the cover member and the second cover member, and the convex portion is provided between the fixing portion and the rod-shaped member. The vehicle seat according to claim 6, wherein the vehicle seat is a vehicle seat.

Images