JP5572462B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat provided with an input member that receives a load from another member on the vehicle seat.

  2. Description of the Related Art Conventionally, there is known a vehicle seat including a seatback frame in which a pipe material is formed in a rectangular frame shape, and a reinforcing member that is fixed in an inclined state from an outer side in the left-right direction toward an inner bottom. (See Patent Document 1). The reinforcing member has an outer end protruding from the frame, and a flange is provided at the end.

  In such a vehicle seat, a side impact load applied to one flange from the outer side in the left-right direction is transmitted to the opposite side to the one flange via the reinforcing member and the other flange.

Japanese Patent Laid-Open No. 11-2222088

  However, in the prior art, there is a possibility that the flange (input member) may be deformed depending on the input direction of the load.

  Then, an object of this invention is to provide the vehicle seat which can receive the load from another member favorably with an input member.

In order to achieve the above-described object, the vehicle seat according to the present invention is provided so as to be adjacent to one of the left and right base frames constituting the left and right portions of the seat back frame, and a load is input from another member. The input member has a closed cross-sectional shape in which the input-side end portion expands in the vertical and / or front-rear direction than the output-side end portion, and is a portion separated from the upper and lower ends of the front and rear walls. A recess that is recessed inward in the front-rear direction is formed, and the bottom walls of each recess are joined together .

According to the present invention, the input member, the input side end portion forms a closed cross section whose diameter increases the vertical and / or before and after than the output end, the input end in the input direction of load in two It can be a heavy wall structure. Thereby, since the rigidity of an input member can be improved, since a deformation | transformation of an input member can be suppressed, the load from another member can be favorably received by an input member. Moreover, since the rigidity of an input member can be improved because the bottom walls of each recessed part are joined, transmission of a load can be performed favorably.

In the present invention, the front wall of the input member may have an inclined surface that is inclined forward from the bottom wall of the recess so as to gradually increase the front-rear width of the input member.

According to this, since stress when a load is applied can be suppressed from concentrating on a part of the input member, deformation of the input member can be suppressed, so that the load from the other member is better at the input member. Can receive.

Further, in the present invention, the rear wall of the input member is such that the bottom wall of the recess is welded to the bottom wall of the recess of the front wall of the input member and protrudes rearward from the bottom wall of the recess of the rear wall. However, it can be set as the structure welded to the said seat back frame.

In the present invention, the front wall of the input member is a portion where the bottom wall of the concave portion is welded to the bottom wall of the concave portion of the rear wall of the input member and protrudes forward from the bottom wall of the concave portion of the front wall. However, it can be set as the structure welded to the said seat back frame.

In the present invention, a plate-like side frame joined adjacently in the left-right direction of one base frame is provided, and the rear portion of the side frame is bent inward in the left-right direction, and the output of the rear wall of the input member A side edge part can be set as the structure joined to the rear part of the said side frame.

In the present invention, the rear wall of the input member may have a portion that bulges toward the rear at the lower end, and the portion is welded to the seat back frame.

According to this, since the front-rear width of the lower end portion of the input side end portion is larger than the front-rear width of the upper end portion, a load input area can be ensured, and the load from other members can be better improved with the input member. Can receive. Moreover, a load can be transmitted favorably.

In the present invention, the input member is welded to the seat back frame at a portion protruding forward from the bottom wall of the recess in the front wall and a portion protruding rearward from the bottom wall of the recess in the rear wall. It can be set as a structure.

According to the present invention , since the rigidity of the input member can be improved, the input member can be prevented from being deformed, so that the input member can favorably receive a load from another member. In addition, since the rigidity of the input member can be increased, the load can be transmitted favorably.

According to the present invention, the front wall of the input member has an inclined surface that is inclined forward from the bottom wall of the recess so as to gradually increase the front-back width of the input member. Since deformation can be suppressed, a load from other members can be more favorably received by the input member.

In addition, according to the present invention, since the rear wall of the input member has a portion that bulges toward the rear at the lower end thereof, the load input area can be secured, The load from the member can be received better.

It is a perspective view showing a vehicular seat concerning one embodiment of the present invention. It is the expansion perspective view which looked at the structure around a bracket from the front side. It is II sectional drawing of FIG. It is the expansion perspective view which looked at the structure around a bracket from the back side. It is sectional drawing of a bracket.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The vehicle seat according to the present invention is configured by covering a seat cushion made of urethane foam or the like on the outside of a seat frame 1 as shown in FIG. The seat frame 1 includes a seat back frame 2 and a seating portion frame 3. In the present invention, front and rear, left and right, and top and bottom are based on a passenger sitting on the seat.

  The seat back frame 2 includes a pair of side frames 4, a reinforcing frame that reinforces the side frames 4, that is, a pipe frame 5, a lower frame 6, and a bracket 7 as an example of an input member.

  The pipe frame 5 has a cylindrical pipe shape (closed cross-sectional shape), and is formed by being bent into a substantially rectangular ring shape. The pipe frame 5 includes side portions 52 and 53 as examples of the left and right base frames, a lower portion 51 that connects the lower ends of the side portions 52 and 53, and an upper portion 54 that connects the upper ends of the side portions 52 and 53. have.

  A lower portion 51 (including a portion extending obliquely downward from the side frame 4) of the pipe frame 5 functions as a load transmitting portion that transmits a load in the left-right direction together with the lower frame 6.

  Further, two wires W bent up and down a plurality of times are joined to the left and right side portions 52 and 53 of the pipe frame 5 so as to be spaced apart vertically. A pressure receiving member C made of resin is fixed. As a result, when the vehicle receives a rear impact load, the occupant sinks backward together with the pressure receiving member C in the pipe frame 5, so that the influence of the rear impact load on the occupant is mitigated.

  The side frame 4 is a plate-like member joined adjacent to the outer side in the left-right direction of the lower portion of the pipe frame 5 (each side portion 52, 53), together with each side portion 52, 53. It constitutes the left and right parts. As shown in FIG. 2, the side frame 4 is formed so as to protrude forward (at least one in the front-rear direction) from the pipe frame 5. As a result, a forward projecting shape of the seat back side portion is formed, and components such as an airbag (not shown) can be satisfactorily fixed to the plate-like side frame 4 extending in the front-rear direction. ing.

  Specifically, as shown in FIG. 3, the side frame 4 is formed with a hole 41 penetrating left and right at an appropriate position, and the front portion 42 of the side frame 4 bends inward in the left-right direction, and then bends backward U It is bent in a letter shape. Thereby, the rigidity of the front part 42 of the side frame 4 is improved.

  The rear portion 43 of the side frame 4 is bent in an approximately L shape toward the inner side in the left-right direction, and is joined to the pipe frame 5 by welding. In FIG. 3, the points welded by the welding torch T are indicated by large black dots.

  As shown in FIG. 1, the lower frame 6 is a plate-like member extending in the left-right direction, joined to and connected to the lower part of each side frame 4, and joined to the lower part 51 of the pipe frame 5. As a result, the load applied to the bracket 7 from the outside in the left-right direction is transmitted to the left-right opposite side of the bracket 7 via the lower frame 6 and the lower part 51 of the pipe frame 5 described above.

  The bracket 7 is a component configured separately from the pipe frame 5 and the side frame 4, and is adjacent to the left side (outside in the left-right direction) of the side portion 53 (one base frame) of the pipe frame 5 via the side frame 4. It is provided to do.

  In the bracket 7, when the vehicle seat is attached to the vehicle, the input side end 7a (outer wall 73 (see FIG. 2)) on the outer side in the left-right direction is a side panel (other member) such as a side pillar or door of the vehicle. The side impact load applied to the vehicle from the input side end 7a is input via the side panel. The bracket 7 outputs (transmits) a load input from the input side end 7a to the side frame 4 and the pipe frame 5 from the output side end 7b on the inner side in the left-right direction.

  As shown in FIG. 2, the bracket 7 is directly fixed to the pipe frame 5 by welding through two holes 41 (openings) formed in the side frame 4. Thereby, it is possible to transmit the load from the bracket 7 to the pipe frame 5 without being affected by the deformation of the side frame 4 regardless of the input angle or the magnitude of the side impact load. It has become. In FIGS. 2 and 4, the welded portion is indicated by dot hatching.

  Specifically, the bracket 7 is configured by fitting a front box-shaped member 8 and a rear box-shaped member 9 which are divided in the front-rear direction, and each box when cut by a plane orthogonal to the left-right direction. The closed members 8 and 9 form a closed cross-sectional shape.

  The front box-shaped member 8 includes a plate-like front wall 81 that extends longer in the vertical direction than the left-right direction, an upper wall 82 that extends rearward from the upper end of the front wall 81, and a rearward end from the laterally outer end of the front wall 81. An extending outer wall 83 and a lower wall 84 extending rearward from the lower end of the front wall 81 are integrally provided. That is, the front box-shaped member 8 is formed in a box shape that opens rearward and inward in the left-right direction.

  In the front wall 81, two concave portions 81a (concave and convex shapes) that are recessed inward in the front-rear direction are formed side by side at a predetermined interval in a portion away from the upper and lower ends of the front wall 81. Thereby, since the rigidity of the front wall 81 is improved, it is possible to satisfactorily transmit the side impact load to the pipe frame 5 by the highly rigid front wall 81.

  Moreover, each recessed part 81a is opened in the front and the left-right direction inner side by being formed in the output side edge part 8b of the front wall 81. As shown in FIG. As a result, the edge 81c of the output side end 8b is bent back and forth, so that the rigidity of the output side edge 81c of the side impact load can be increased, and the side impact load can be transmitted to the pipe frame 5 and the like. It is possible.

  As shown in FIG. 3, the inner wall 81g on the left side of each recess 81a is inclined diagonally right rearward from the front surface of the input side end 8a of the front wall 81 toward the bottom wall 81d of the recess 81a. In other words, the front wall 81 has an inclined surface (inner wall 81g) inclined with respect to the left-right direction so as to gradually reduce the front-rear width of the bracket 7 from left to right. Thereby, since it can suppress that the stress when a load is added concentrates on a part of front wall 81, since deformation of bracket 7 can be controlled, it is possible to receive a load favorably. . Moreover, it is possible to transmit the load well.

  Further, as shown in FIG. 2, an extending portion 81 e (a part of the input member on the inner side in the left-right direction) is formed on the bottom wall 81 d of each recess 81 a, extending inward in the left-right direction with respect to the edge 81 c of the front wall 81. ing. The extending portion 81e extends to the pipe frame 5 through the hole 41 of the side frame 4 described above, and is welded in a state of being abutted against the pipe frame 5.

  By adopting a structure in which only the extended portion 81e is passed through the hole 41 in this manner, the size of the hole 41 may be made to be a size corresponding to the extended portion 81e. 4 can be improved. Specifically, in the present embodiment, the hole 41 is formed to be smaller than the front-rear width of the pipe frame 5, is smaller than the vertical length of the entire edge 81c of the front wall 81, and is higher than the extended portion 81e. The shape of the long hole is large.

  The size of the hole 41 may be at least equal to or smaller than the area of the cross-sectional shape of the output-side end 7b (end in the left-right direction) of the bracket 7. When the hole 41 is formed in such a size, for example, the rigidity of the side frame 4 can be increased as compared with a case where a hole having a size that allows the entire end of the bracket 7 on the inner side in the left-right direction to pass therethrough is formed. It is possible.

  In the present embodiment, the extending portion 81e is provided, but the present invention is not limited to this, and the extending portion 81e may not be provided. In this case, there is a slight gap between the pipe frame 5 and the edge 81c of the front wall 81, but welding is possible even if such a gap is left, and the pipe frame 5 and the bracket 7 Can be fixed directly.

  As shown in FIG. 3, the portion (including the extending portion 81 e) that becomes the edge of the bottom wall 81 d of the recess 81 a in the edge 81 c of the output side end portion 8 b is located within the front-rear width of the pipe frame 5. . Among these, the extending part 81e is fixed to the central part 5a of the pipe frame 5 in the front-rear direction. Thereby, since the load from the bracket 7 is concentrated and transmitted to the center part 5a of the pipe frame 5, it is possible to transmit the load better.

  The center 5 b in the front-rear direction of the pipe frame 5 is located within the front-rear width of the bracket 7. Thereby, it is possible to prevent the bracket 7 from slipping back and forth on the cylindrical outer surface of the pipe frame 5 at the time of a side collision, so that it is possible to transmit the load better.

  As shown in FIG. 2, the upper and lower portions of the edge 81c of the front wall 81 are fixed to the side frame 4 by welding. That is, the front wall 81 is directly fixed to both the side frame 4 and the pipe frame 5. As a result, the load input to the bracket 7 is transmitted not only to the pipe frame 5 but also to the load transmission part (the lower frame 6 and the lower part 51 of the pipe frame 5) not only through the side frame 4, but the load is further improved. It is possible to communicate to. Note that the load transmitted to the load transmitting portion can be transmitted to the vehicle body side through a console box or the like provided on the side opposite to the bracket 7.

  As shown in FIG. 4, the rear box-shaped member 9 includes a plate-shaped rear wall 91 that extends longer in the vertical direction than the left-right direction, an upper wall 92 that extends forward from the upper end of the rear wall 91, and the rear wall 91. An outer wall 93 extending forward from the outer end in the left-right direction and a lower wall 94 extending forward from the lower end of the rear wall 91 are integrally provided. That is, the rear box-shaped member 9 is formed in a box shape that opens forward and inward in the left-right direction.

  In the rear wall 91, two concave portions 91a (concave and convex shapes) that are recessed inward in the front-rear direction are formed side by side at a predetermined interval in a portion away from the upper and lower ends of the rear wall 91. Thereby, since the rigidity of the rear wall 91 is improved, it is possible to favorably transmit the side impact load to the inside in the left-right direction by the rear wall 91 having high rigidity.

  As shown in FIG. 3, the inner wall 91g on the left side of each recess 91a is inclined diagonally right forward from the rear surface of the input side end 9a of the rear wall 91 toward the bottom wall 91d of the recess 91a. In other words, the rear wall 91 has an inclined surface (inner wall 91g) inclined with respect to the left-right direction so as to gradually reduce the front-rear width of the bracket 7 from left to right. Thereby, since it can suppress that the stress when a load is added concentrates on a part of rear wall 91, since it can suppress a deformation | transformation of the bracket 7, it can receive a load favorably. . Moreover, it is possible to transmit the load well.

  Each recess 91a is disposed so as to face the respective recesses 81a of the front box-like member 8 in the front-rear direction, and each bottom wall 91d and each bottom wall 81d of each recess 81a are disposed so as to contact each other. Yes. As a result, the two bottom walls 81d and 91d adjacent to each other form a thick portion at a substantially central portion in the front-rear direction of the bracket 7, so that the side impact load can be transmitted satisfactorily. Yes.

  Two bottom walls 81d and 91d adjacent to each other are joined by welding. Thereby, since the rigidity of bracket 7 can be raised, it is possible to transmit a side impact load satisfactorily.

  The two bottom walls 81 d and 91 d adjacent to each other are located within the front-rear width of the pipe frame 5. Thereby, it is possible to satisfactorily transmit the side impact load to the pipe frame 5 through the thickened portion by combining the two bottom walls 81d and 91d.

  Furthermore, the center 5b of the pipe frame 5 in the front-rear direction is located within the front-rear width of the thick portion including the bottom walls 81d and 91d. As a result, the load can be concentrated and transmitted to the vicinity of the center 5b of the pipe frame 5 through the thickened portion by combining the two bottom walls 81d and 91d.

  Further, the edge 91 c of the output side end portion 9 b in the upper portion of the rear wall 91 (the upper portion from the lower concave portion 91 a) is located within the longitudinal width of the pipe frame 5. As a result, the output side end portion 9b, specifically, the edge 91c and the edge 81c of the front wall 81 (the portion serving as the edge of the bottom wall 81d) are positioned within the width of the pipe frame 5 (base frame) in the front-rear direction. It becomes. As a result, since the input load is transmitted to the pipe frame 5 in a concentrated manner, it is possible to transmit the load satisfactorily.

  As shown in FIG. 4, the output side end portion 9 b of the rear wall 91 is fixed to the side frame 4 by welding. More specifically, as shown in FIG. 3, the output side end portion 9 b of the rear wall 91 is a closed cross section formed by the rear portion 43 of the side frame 4 bent in an L shape and the left rear portion of the pipe frame 5. It is joined to the shape part. As a result, the side impact load transmitted from the rear wall 91 to the inner side in the left-right direction is favorably received by the closed cross-sectional shape portion and is successfully transmitted to the pipe frame 5.

  As shown in FIG. 2, the upper wall 92, the outer wall 93 and the lower wall 94 of the rear box-shaped member 9 are arranged so as to cover the upper wall 82, the outer wall 83 and the lower wall 84 of the front box-shaped member 8. These are fixed to the walls 82 to 84 by welding.

  As a result, as shown in FIG. 3, the outer wall 73 of the bracket 7 is overlapped with the outer walls 83 and 93 (two plate-like portions) of the box-like members 8 and 9 at positions away from the front and rear ends. A step B (uneven shape) is formed by the alignment. Therefore, the substantially central portion of the outer wall 73 in the front-rear direction is formed thick by overlapping the outer walls 83 and 93, so that the rigidity of the outer wall 73 can be increased and the side impact load can be transmitted well. It has become.

  Similarly, the upper wall 72 and the lower wall 74 of the bracket 7 have a step B (not shown) due to the overlapping of the upper walls 82 and 92 of the box-shaped members 8 and 9 and the lower walls 84 and 94. Is formed. That is, by fitting the rear box-shaped member 9 so as to cover the front-side box-shaped member 8, the upper wall 72, the outer wall 73, and the lower wall 74 of the bracket 7 are stepped B across the walls 72-74. It is formed continuously.

  As a result, the thick portion of the outer wall 73 is formed continuously with the thick portions of the upper wall 72 and the lower wall 74, so that the side impact load received by the thick portion of the outer wall 73 is continuously increased in the upper and lower thicknesses. It can be transmitted to the inside in the left-right direction through the thick part.

  As shown in FIG. 4, the rear wall 91 is formed so that the lower end portion 91 f bulges in a substantially mountain shape toward the rear. Thereby, as for the bracket 7, the front-back width D1 of a lower end part is larger than the front-back width D2 of an upper end part. As a result, the load input area can be secured and the rigidity of the lower end of the bracket 7 where load transmission is mainly performed is improved, so that the load can be received more favorably. Moreover, it is possible to transmit the load well.

  As shown in FIGS. 2 and 4, each box-shaped member 8, 9 (bracket 7) has an input side end portion 7 a (8 a and 9 a) whose diameter is increased in the vertical direction than the output side end portion 7 b (8 b and 9 b). doing. More specifically, as shown in FIG. 5, the bracket 7 has a closed cross-sectional shape, and has a shape in which the left side (outside in the left-right direction) portions of the upper wall 72 and the lower wall 74 bulge upward or downward. ing.

  As a result, the bulged portion of the bracket 7, that is, the upper end portion (bulged portion 75) and the lower end portion (bulged portion 76) of the input side end portion 7 a are doubled in the left-right direction that is the load input direction. It becomes a wall structure. As a result, since the rigidity of the bracket 7 can be improved, the deformation of the bracket 7 can be suppressed, so that the bracket 7 can receive a load from the side panel or the like satisfactorily. Moreover, it is possible to transmit the load well. Moreover, since the area of the input side end part 7a (outer wall 73) can be ensured by having the bulging parts 75 and 76, it is possible to receive a load reliably.

  Walls 75a, 76a (a part of the upper wall 72 and the lower wall 74) on the right side (in the left-right direction) of the bulging portions 75, 76 are directed from the upper end or lower end of the bulging portions 75, 76 toward the side frame 4 side. The bracket 7 has an inclined surface inclined with respect to the left-right direction so as to gradually reduce the vertical width. Thereby, since it can suppress that the stress when a load is added concentrates on a part of upper wall 72 or lower wall 74, since deformation of bracket 7 can be controlled, it can receive a load favorably. It has become. Moreover, it is possible to transmit the load well.

The effects of the vehicle seat of the present embodiment as described above are summarized below.
Since the bracket 7 has a closed cross-sectional shape and the input side end 7a has a diameter larger than that of the output side end 7b, the rigidity of the bracket 7 can be improved. Thereby, since the deformation | transformation of the bracket 7 can be suppressed, the load from a side panel etc. can be favorably received in the bracket 7. FIG. In addition, the load can be satisfactorily transmitted from the bracket 7 to the pipe frame 5 and the lower frame 6.

  Since the front-rear width D1 of the lower end portion of the input side end portion 7a is larger than the front-rear width D2 of the upper end portion, the load input area can be secured, the load can be received better, and the load is better Can be communicated to.

  Since the output side end portion 7b of the bracket 7 is located within the width of the pipe frame 5 in the front-rear direction, the input load can be concentrated on the pipe frame 5, and the load received by the bracket 7 is good for the pipe frame 5. Can be communicated to.

  Since the front wall 81 and the rear wall 91 of the bracket 7 have inclined surfaces (inner walls 81g, 91g) inclined with respect to the left-right direction so as to gradually reduce the front-rear width of the bracket 7, it is possible to suppress deformation of the bracket 7. Therefore, the load can be received better. Further, the load can be transmitted better.

  Since the upper wall 72 and the lower wall 74 of the bracket 7 have inclined surfaces (walls 75a, 76a) inclined with respect to the left-right direction so as to gradually reduce the vertical width of the bracket 7, deformation of the bracket 7 can be suppressed. Therefore, the load can be received better. Further, the load can be transmitted better.

  Since the bracket 7 is directly fixed to the pipe frame 5 instead of the side frame 4, the load is not affected by the deformation of the side frame 4 regardless of the input angle or size of the side impact load. Can be satisfactorily transmitted from the bracket 7 to the pipe frame 5.

  Since the bracket 7 is configured separately from the pipe frame 5, each can be formed in a free shape, and the assemblability can be improved.

  By fixing the bracket 7 and the pipe frame 5 through the opening (hole 41) formed in the side frame 4, for example, it is not necessary to divide the side frame back and forth or up and down so as to avoid the fixing part of the bracket and the pipe frame. The rigidity of the side frame 4 can be improved.

  Since only a part of the bracket 7 (the extended portion 81e) is fixed to the pipe frame 5 through the opening (hole 41), it is not necessary to form an opening in the side frame so as to pass through the entire side part on the inner side in the left-right direction of the bracket. Therefore, the rigidity of the side frame 4 can be further improved.

  Since the opening formed in the side frame 4 is the hole 41, for example, the bracket 7 and the pipe frame 5 in the side frame 4 are fixed compared to a structure in which the opening is formed in a groove shape (notch shape) opened forward or backward. Since the upper part and the lower part can be connected before and after the fixed part, the rigidity of the side frame 4 can be further improved.

  Since the bracket 7 is fixed to the pipe frame 5 having a closed cross-sectional shape, the load from the bracket 7 is satisfactorily applied to the load transmission part (the lower frame 6 and the lower part 51 of the pipe frame 5) via the pipe frame 5 that is difficult to deform. Can communicate.

  Since the bracket 7 is directly fixed to both the side frame 4 and the pipe frame 5, the load input to the bracket 7 is transmitted not only to the pipe frame 5 but also to the load transmission portion via the side frame 4. The load can be transmitted better.

  Since the center 5b of the pipe frame 5 is located within the front-rear width of the bracket 7, it is possible to suppress the bracket 7 from slipping back and forth on the cylindrical outer surface of the pipe frame 5 at the time of a side collision. Can be transmitted better.

  Since the bracket 7 is fixed to the central portion 5a in the front-rear direction of the pipe frame 5, the load from the bracket 7 is concentrated and transmitted to the central portion 5a in the front-rear direction of the pipe frame 5, so that the load is transmitted better. Can do.

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 above embodiment, the base frame (side portions 52 and 53 of the pipe frame 5) has a cylindrical pipe shape, but the present invention is not limited to this, and may be a polygonal pipe shape, A polygonal columnar member may be employed.

  In the above embodiment, the input member is the bracket 7 composed of the two box-shaped members 8 and 9, but the present invention is not limited to this. For example, the bracket may be a single box-shaped member or a plate. A thick plate-shaped member may be used.

  In the said embodiment, although the load transmission part was comprised with the lower frame 6 and the lower part 51 of the pipe frame 5, this invention is not limited to this. For example, in the above-described embodiment, the load transmitting portion (lower part 51) is integrally formed with the pipe frame 5 which is the base frame. However, when the pipe frame is formed in a U-shape opening downward, each pipe frame 5 A separate frame connecting the lower end portions may be used as the load transmitting portion. In addition, for example, when the lower part 51 of the pipe frame 5 in the above embodiment is divided in the middle and joined to the lower frame 6, the lower part 51 and the lower frame 6 that extend partway may be used as the load transmitting portion.

In the said embodiment, although the bracket 7 and the pipe frame 5 were fixed by welding, this invention is not limited to this, For example, you may fix with a volt | bolt etc.
In the embodiment, the hole 41 is employed as the opening. However, the present invention is not limited to this, and may be, for example, a notch opening forward or backward.

  In the above-described embodiment, a part of the bracket 7 (the extended portion 81e) is passed through the opening (hole 41). However, the present invention is not limited to this, and a part of the base frame is passed through the opening and fixed directly to the bracket. May be.

In the said embodiment, although the bracket 7 was directly fixed to the pipe frame 5, this invention is not limited to this, For example, you may fix only to the side frame of the said embodiment.
In the embodiment described above, the seat back frame 2 includes the side frame 4, but the present invention is not limited to this, and may have a configuration not including the side frame, for example.

  In the above embodiment, the entire base frame (pipe frame 5) has a closed cross-sectional shape, but the present invention is not limited to this, and at least a portion of the base frame to which the input member is fixed may have a closed cross-sectional shape. That's fine.

  In the above embodiment, the front wall 81 and the rear wall 91 of the bracket 7 have inclined surfaces (inner walls 81g, 91g) inclined with respect to the left-right direction so that the front-rear width of the bracket 7 is gradually reduced. The invention is not limited to this. For example, only one of the front wall 81 and the rear wall 91 may have an inclined surface, or both may not have an inclined surface.

  Similarly, in the above-described embodiment, the upper wall 72 and the lower wall 74 of the bracket 7 have inclined surfaces (walls 75a and 76a) inclined with respect to the left-right direction so that the vertical width of the bracket 7 is gradually reduced. However, the present invention is not limited to this. For example, only one of the upper wall 72 and the lower wall 74 may have an inclined surface, or both may not have an inclined surface.

  In the above embodiment, the output side end portion 8b of the front wall 81 is located within the width of the pipe frame 5 in the front-rear direction, only a part of the edge 81c (the portion that becomes the edge of the bottom wall 81d). The present invention is not limited to this. For example, the entire edge of the output side end may be positioned within the width of the pipe frame 5.

  In the embodiment, the front-rear width D1 of the lower end portion of the bracket 7 (input side end portion 7a and output side end portion 7b) is larger than the front-rear width D2 of the upper end portion, but the present invention is not limited to this. The front-rear width of the lower end portion of the input member and the front-rear width of the upper end portion may be the same. Moreover, you may make the front-back width | variety of a lower end part larger than the front-back width | variety of an upper end part only at an input side edge part.

  In the embodiment, the input side end 7a of the bracket 7 (input member) has a diameter larger than that of the output side end 7b. However, the present invention is not limited to this, for example, the input side of the input member The end portion may have a larger diameter in the front-rear direction than the output-side end portion. Further, the input side end of the input member may have a diameter that is larger in the vertical direction and the front and rear direction than the output side end.

  In the above embodiment, the input member is a member that receives a vehicle side impact load. However, the present invention is not limited to this, and may be a member that receives a load from an occupant, such as an armrest mounting member. It may be a member that receives a load from the airbag when the airbag unit is operated, such as an attachment member. Further, for example, a member that receives its own weight (load), such as a motor, may be used, such as an attachment member for attaching a heavy motor or the like.

  In the said embodiment, although the input member was provided in the outer side of the side frame, this invention is not limited to this. For example, when a plate-like side frame is further provided on the inner side in the left-right direction of the reinforcing frame (pipe frame 5) in the embodiment, an armrest mounting member as described above is disposed on the inner side in the left-right direction of the side frame. The armrest mounting member or the like may be directly fixed to the reinforcing member.

2 Seat Back Frame 4 Side Frame 5 Pipe Frame 6 Lower Frame 7 Bracket 7a Input Side End 7b Output Side End 51 Lower 52 Side 53 Side 53 72 Upper Wall 74 Lower Wall 75 Swell Part 75a Wall 76 Swell Part 76a Wall 81 Front wall 81g Inner wall 91 Rear wall 91g Inner wall D1 Front and rear width D2 Front and rear width

Claims (7)

Left and right base frames constituting the left and right parts of the seat back frame;
An input member that is provided adjacent to one base frame and receives a load from another member;
The input member is
The input side end has a closed cross-sectional shape that expands up and down and / or front and back than the output side end,
A vehicular seat characterized in that a recess recessed inward in the front-rear direction is formed at a site away from the upper and lower ends of the front and rear walls, and the bottom walls of each recess are joined together . 2. The vehicle according to claim 1, wherein the front wall of the input member has an inclined surface that is inclined forward from the bottom wall of the recess so as to gradually increase the front-rear width of the input member. Sheet. The rear wall of the input member is
The bottom wall of the recess is welded to the bottom wall of the recess in the front wall of the input member;
The vehicle seat according to claim 1 or 2, wherein a portion protruding rearward from the bottom wall of the recess of the rear wall is welded to the seat back frame. The front wall of the input member is
The bottom wall of the recess is welded to the bottom wall of the recess in the rear wall of the input member;
4. The vehicle seat according to claim 1, wherein a portion protruding forward from the bottom wall of the concave portion of the front wall is welded to the seat back frame. 5. It has a plate-like side frame joined adjacent to the left and right direction of one base frame,
The rear part of the side frame is bent inward in the left-right direction,
5. The vehicle seat according to claim 1, wherein an output side end portion of a rear wall of the input member is joined to a rear portion of the side frame. The rear wall of the input member has a portion that bulges toward the rear at a lower end portion, and the portion is welded to the seat back frame. The vehicle seat according to claim 1. The input member is characterized in that a portion projecting forward from the bottom wall of the concave portion of the front wall and a portion projecting rearward from the bottom wall of the concave portion of the rear wall are welded to the seat back frame. The vehicle seat according to any one of claims 1 to 6.

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