JP6534690B2 - Armrest device and vehicle seat - Google Patents

Description

The present invention relates to an armrest device including an armrest frame and a support member rotatably supporting the armrest frame , and a vehicle seat including the armrest device .

  For example, Patent Document 1 discloses an armrest device that includes an armrest frame and a support member such as a mounting bracket that rotatably supports the armrest frame. In this technique, the armrest frame is rotatably attached to the seatback frame by fixing the mounting bracket to the side of the seatback frame of the vehicle seat.

JP, 2015-44440, A

  When a large load is input to the armrest in the use position from the inside in the left-right direction of the seat, the armrest frame may be excessively deformed to be bent outward in the left-right direction of the seat by the large load.

Then, an object of this invention is to provide the vehicle seat provided with such an armrest apparatus which can suppress that an armrest flame | frame will deform | transform too much, and such an armrest apparatus .
Another object of the present invention is to reduce the weight of the armrest frame as a whole while securing the rigidity of the armrest frame.
Another object of the present invention is to improve the rigidity of the armrest frame.
Another object of the present invention is to reduce the number of parts constituting the support member or to simplify the support member.

  The present invention to achieve the above object is an armrest device comprising an armrest frame and a support member rotatably supporting the armrest frame, wherein the armrest frame is a longitudinal end. A proximal end close to the pivot center and a distal end far from the pivot center, and at least one of the armrest frame and the support member is a portion facing the other in the pivot axis direction of the armrest frame The armrest is characterized in that it has a first restricting portion provided so as to project to the other side in a portion located closer to the base end side than the rotation center when the armrest is in the use position.

  According to such a configuration, when a large load is input to the armrest in the use position from the inside in the left-right direction of the seat and the armrest frame is deformed outward in the left-right direction, at least one of the armrest frame and the support member The first restricting portion provided on the other side abuts on the other. As a result, since the further deformation in the lateral direction of the armrest frame is restricted, it is possible to suppress excessive deformation of the armrest frame so as to be bent outward in the lateral direction of the seat.

  In the armrest device described above, when the armrest is in the use position, the first restricting portion is disposed on a straight line connecting the rotation center and the base end of the armrest frame when viewed from the rotation axis direction. Can be configured.

  According to this, when a large load is input to the armrest in the use position from the inside in the left-right direction of the seat, the first restricting portion and the other provided on at least one of the armrest frame and the support member Since the contact is made on a straight line connecting the movement center and the base end, excessive deformation of the armrest frame can be effectively suppressed by the first restricting portion.

  In the armrest device described above, the first restricting portion is provided on the support member, and when the armrest is in the use position, at a position overlapping with the base end of the armrest frame when viewed from the pivot axis direction. It can be a configuration that is arranged.

  According to this, when a large load is input to the armrest in the use position from the inside in the left-right direction of the seat, the base end of the armrest frame abuts on the first restricting portion provided on the support member. The first restricting portion can effectively suppress excessive deformation of the armrest frame.

  In the armrest device described above, the armrest frame includes a main frame, and a reinforcing frame thicker than the main frame and provided so as to overlap the proximal end portion of the main frame. Can.

  According to this, the rigidity of the base end side portion of the armrest frame can be secured by the reinforcing frame having a thickness greater than that of the main frame. On the other hand, since it is possible to reduce the thickness of the main frame and reduce the weight, it is possible to reduce the weight of the armrest frame as a whole.

  In the armrest device described above, the reinforcing frame is disposed on the opposite side to the support member with the main frame interposed therebetween, and the main frame and the reinforcing frame have a portion closer to the base end than the rotation center It can be in a connected configuration.

  According to this, since the base end portion of the main frame and the reinforcing frame become difficult to separate, the rigidity of the armrest frame can be improved. When a large load is input to the armrest at the use position from the inside in the left-right direction of the seat and the tip end of the main frame tries to deform outward in the left-right direction, the base end part of the mainframe is The main frame and the reinforcing frame are connected at the proximal end portion, so that the main frame is reinforced by the reinforcing frame, and the main frame is excessive. Deformation can be effectively suppressed.

  In the armrest device described above, the main frame includes a first base portion, a first side wall portion extending from the end on the proximal end side of the first base portion to the opposite side to the support member, and the first side wall portion And a first folded back portion extending from the end of the back end so that the tip end is directed to the first base portion, and the reinforcing frame is provided with a second base portion provided so as to overlap the first base portion. A second side wall portion extending from the proximal end side of the second base portion to the opposite side to the support member and overlapping the first side wall portion; and a tip end portion extending from an end of the second side wall portion The reinforcing frame and the main frame have the first fold back portion and the second fold back portion overlapping each other with the second fold back portion facing the second base portion and overlapping the first fold back portion. With connected parts Rukoto can.

  According to this, the main frame and the reinforcing frame can be connected without welding or the like, and the rigidity of the armrest frame can be improved.

  In the above-described armrest device, the first folded portion and the tip end portion of the second folded portion may be configured to have a gap between the second side wall portion and the second side wall portion.

  According to this, the rigidity of the armrest frame can be further improved as compared with the case where the folded portion and the second side wall portion are folded back to contact.

  In the armrest device described above, the armrest frame has a projecting portion provided to project toward the support member, and the support member projects toward the armrest frame and the first restricting portion, the projection And a second restricting portion for restricting the rotation of the armrest frame, and the first restricting portion and the second restricting portion are formed as a continuous convex portion. it can.

  According to this, as compared with the case where the first restricting portion and the second restricting portion are formed as separate convex portions, the number of parts constituting the support member can be reduced or the support member can be simplified. can do.

  In the armrest device described above, the armrest frame is disposed on the main frame and on the opposite side of the support member with respect to the main frame, and is provided so as to overlap the proximal end portion of the main frame A reinforcing frame having a thickness greater than that of the main frame, and the protrusion is provided on the reinforcing frame, and protrudes toward the support member more than the main frame through a through hole formed in the main frame Can be configured.

  According to this, the rigidity of the armrest frame can be secured by the reinforcing frame having a large thickness, and the weight of the armrest frame as a whole can be reduced by reducing the thickness of the main frame. Further, the rigidity of the protrusion can be improved as compared to the case where the protrusion is provided on the main frame. Further, when the main frame and the reinforcing frame are assembled, the position of the reinforcing frame with respect to the main frame can be determined by engaging the protrusion of the reinforcing frame with the through hole of the main frame.

  In the armrest device described above, the support member may be a bracket for attaching the armrest frame to a frame of a seat, and the first restricting portion may be provided on the bracket.

  According to the present invention, excessive deformation of the armrest frame can be suppressed.

  Further, according to the present invention, by arranging the first restricting portion on a straight line connecting the rotation center and the base end of the armrest frame when the armrest is in the use position, excessive deformation of the armrest frame can be effectively achieved. Can be suppressed.

  Further, according to the present invention, the first restricting portion is provided on the support member, and the armrest is disposed at a position overlapping with the base end of the armrest frame when the armrest is in the use position. Can be suppressed.

  Further, according to the present invention, by configuring the armrest frame to include the main frame and the reinforcing frame, it is possible to reduce the weight of the armrest frame as a whole while securing the rigidity of the armrest frame.

  Further, according to the present invention, by connecting the main frame and the reinforcing frame at a portion closer to the base end than the rotation center, the rigidity of the armrest frame can be improved, and excessive deformation of the main frame is effective. Can be suppressed.

  Further, according to the present invention, by connecting the reinforcing frame and the main frame at a portion where the first turnback portion and the second turnback portion overlap, they are connected without welding or the like to improve the rigidity of the armrest frame. be able to.

  Further, according to the present invention, the rigidity of the armrest frame is further improved by providing a gap between the first folded portion, the tip of the second folded portion, and the second side wall portion of the reinforcing frame. Can.

  Further, according to the present invention, the number of parts constituting the support member can be reduced by forming the first restricting portion and the second restricting portion restricting the rotation of the armrest frame as a continuous convex portion, The support member can be configured simply.

  Further, according to the present invention, by providing the projecting portion on the reinforcing frame and projecting it to the support member side through the through hole of the main frame, the rigidity of the projecting portion can be improved and the main frame at the time of assembly Position of the reinforcement frame relative to

It is a perspective view of a vehicle seat concerning an embodiment. They are a figure (a) explaining operation at the time of storing operation of an armrest, and a figure (b) explaining operation at the time of drawer operation. It is an exploded perspective view of an armrest frame and a one way clutch. It is an expansion perspective view of the base end of an armrest frame, and the shaft of a one way clutch. It is a side view of an armrest frame. It is XX sectional drawing of FIG. It is YY sectional drawing of FIG. It is ZZ sectional drawing of FIG. It is a disassembled perspective view of a one way clutch. FIG. 10 is an enlarged side view of the proximal end of the armrest frame and the bracket. It is a perspective view which expands and shows a holding | maintenance part. It is a figure (a)-(c) which shows the state of each member when an armrest is a pulling-out state. It is a figure (a)-(c) which shows the state of each member when rotating an armrest from the position A to the position of the near side of the position B. FIG. It is a figure (a)-(c) which shows the state of each member when rotating an armrest from position A to position B. FIG. It is a figure (a)-(c) which shows the state of each member when rotating an armrest from the position B to the position C. FIG. It is a figure (a)-(c) which shows the state of each member when rotating an armrest from the position C to the position in front of the position A. FIG. It is a figure (a)-(c) which shows the state of each member when rotating an armrest from the position in front of the position A to the position A. FIG. It is a figure which shows an effect | action when a heavy load is applied to the armrest in a use position from the left-right direction inner side.

Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings.
As shown in FIG. 1, the vehicle seat according to the embodiment is configured as, for example, a vehicle seat S mounted on an automobile, and includes a seat back S1, a seat cushion S2, an armrest device AR, and the like. . In the present specification, front, rear, left, right, top and bottom correspond to front, rear, left, right, top, bottom as viewed from a person sitting on the vehicle seat S.

  The vehicle seat S incorporates a metal seat frame SF that constitutes a framework. The vehicle seat S is configured by covering a seat frame SF with a pad material made of a cushion material such as urethane foam and a skin material made of leather, cloth or the like. The seat frame SF has a side frame S11 of the seat back S1 as a side frame that constitutes the left and right frames of the seat frame SF.

  The armrest device AR is disposed on the left side of the seat back S1, and includes an armrest R and a one-way clutch 1. The arm rest R is fixed to a shaft 20 (see FIG. 3) of the one-way clutch 1 fixed to a side frame S11 that constitutes a part of the seat frame SF. The arm rest R, together with the shaft 20 of the one-way clutch 1, can rotate relative to the side frame S11.

  Specifically, as shown in FIG. 2 (a), the armrest R can be pivoted between a drawn-out state (position A) with its tip facing forward and a stored state (position C) with its tip facing upwards is there. The armrest R is moved by the one-way clutch 1 in a predetermined angular range (range from position A to position B) from the pulled out state to the stored state at the time of the storage operation moving from the pulled out state to the stored state. It is in the locked state where rotation in the downward direction is restricted. Supplementally, the armrest R can be pivoted up in the locked state, but can not be pivoted down. Further, the armrest R is in the unlocked state in which rotation in two directions, specifically, in the vertical direction is permitted in the range from the position B to the position C at the time of the storage operation.

Further, as shown in FIG. 2B, the armrest R is allowed to rotate in the vertical direction at the time of the drawing operation to move it from the stored state (position C) to the drawn state (position A). It has become. Then, the armrest R returns to the locked state when it is completely moved to the position A at the time of the pulling operation.
As described above, the armrest R is configured to be switchable between the locked state and the unlocked state by the one-way clutch 1.

  The armrest R includes an armrest frame RF which is pivotable relative to the seat frame SF, as shown in FIG. Although not shown, the armrest R is configured by covering the armrest frame RF with a skin material made of leather, cloth or the like, and injecting a foamed resin such as foamed polyurethane into the gap between the armrest frame RF and the skin material There is. The armrest frame RF includes a long main frame 100 and a reinforcing frame 200 fixed to the shaft 20 of the one-way clutch 1 via the main frame 100.

  The main frame 100 is a member that constitutes the framework of the armrest R, and is formed by processing a metal plate. Specifically, the main frame 100 has a cross-sectional shape as if the peripheral edge portion of the long plate-like member is bent leftward and the tip of the bent portion is bent inward into a substantially arc shape. (See Figure 6).

  In the present embodiment, the left side corresponds to the “opposite side to the support member” and the right side corresponds to the “support member side” with reference to the armrest frame RF. Further, in the following, among the ends in the longitudinal direction of the main frame 100 (armrest frame RF), the end closer to the rotation center RC is referred to as a base end RB, and the end away from the rotation center RC is referred to as a tip RA. It shall be. Also, in the following, the end on the proximal end RB side may be referred to as “proximal part”, and the end on the distal end RA side may be referred to as “distal end”. Further, hereinafter, the longitudinal direction of the main frame 100 (armrest frame RF) is simply referred to as “longitudinal direction”, and the lateral direction of the main frame 100 orthogonal to the longitudinal direction and the lateral direction is referred to as “width direction”. .

  Main frame 100 includes an elongated first base portion 110, a first side wall portion 120 extending leftward from an end on the base end RB side of first base portion 110, and an end in the width direction of first base portion 110. A third side wall 130 extending to the left and a fifth side wall 140 extending to the left from the other end in the width direction of the first base 110 are mainly included.

  As shown in FIG. 4, an insertion hole 111 and a through hole 112 are formed at the proximal end of the first base portion 110. More specifically, a recess 113 is formed at the base end of the first base portion 110 so as to be recessed rightward, and the insertion hole 111 and the through hole 112 are formed at the bottom of the recess 113. The recess 113 is formed in a substantially circular shape centered on the rotation center RC when viewed from the rotation axis direction in which the rotation axis line RL of the armrest frame RF extends, specifically, the left-right direction.

The insertion hole 111 is a hole through which a bolt 90 (see FIG. 3) for fixing the shaft 20 of the one-way clutch 1 to the armrest frame RF is inserted. The insertion hole 111 is disposed substantially at the center of the bottom portion of the concave portion 113, and is formed in a substantially circular shape centered on the rotation center RC.
The through hole 112 is a hole through which the convex portion 21A of the shaft 20 passes. A plurality of through holes 112, specifically, four through holes 112 are provided corresponding to the plurality of convex portions 21A of the shaft 20, and each of the through holes 112 is formed in a substantially arc shape centering on the rotation center RC. The four through holes 112 are arranged at substantially equal intervals on the circumference around the rotation center RC around the insertion hole 111.

Further, as shown in FIG. 5, a plurality of lightening holes 114 are provided in the first base portion 110 side by side in the longitudinal direction. The plurality of lightening holes 114 include a first lightening hole 114A and a second lightening hole 114B.
The first lightening hole 114A is a hole provided at the tip of the first base portion 110 among the plurality of lightening holes 114, and is formed in a substantially oval shape long in the longitudinal direction. The two first first through holes 114A are formed side by side in the longitudinal direction.

The second lightening hole 114B is a hole provided between the first lightening hole 114A and the rotation center RC, in other words, near the central portion in the longitudinal direction of the first base portion 110, and is substantially elongated in the longitudinal direction It is formed in an oval shape. Two second lightening holes 114B are formed side by side in the longitudinal direction. Specifically, near the central portion in the longitudinal direction of the first base portion 110, a substantially oval convex portion 115 which is long in the longitudinal direction and which is convex toward the left side is formed. , And in the longitudinal direction on the convex portion 115.
A portion between the two lightening holes 114 disposed adjacent to each other is a reinforcing portion 116 extending in the width direction so as to connect one end and the other end in the width direction of the first base portion 110.

  As shown in FIG. 3, the first base portion 110 includes a first portion 110A which is a portion on the proximal end RB side, a third portion 110C which is a portion on the distal end RA side, a first portion 110A and a third portion 110C. And a second portion 110B which is a portion between them. The first portion 110A is provided to be substantially orthogonal to the rotation axis RL. The second portion 110B is bent leftward at an end on the tip RA side of the first portion 110A at the first bending portion 110D, and extends leftward as it approaches the tip RA. The third portion 110C is bent to the right from the end on the tip RA side of the second portion 110B at the second bending portion 110E, and extends so as to be substantially parallel to the first portion 110A.

  As shown in FIG. 5, the first portion 110A and the second portion 110B, and the second portion 110B and the third portion 110C are respectively bent at portions where the lightening holes 114 are not formed. In other words, each of the first bent portion 110D and the second bent portion 110E is formed in a portion where the lightening hole 114 is not formed in the longitudinal direction. Specifically, the first bent portion 110D is formed between the convex portion 115 and a stopper portion 300 described later. In addition, the second bending portion 110E is formed in the reinforcing portion 116 formed between the two second lightening holes 114B.

  As shown in FIG. 4, the reinforcing frame 200 is a member for reinforcing the main frame 100, and is formed by processing a metal plate in the same manner as the main frame 100. Specifically, the reinforcing frame 200 has a cross-sectional shape as if the base end of the plate-like member and both ends in the width direction were bent to the left. The reinforcing frame 200 is formed of a plate-like member having a plate thickness thicker than that of the main frame 100. As an example, the thickness of the reinforcing frame 200 is approximately 1.5 times the thickness of the main frame 100.

  The reinforcing frame 200 includes a second base portion 210, a second side wall portion 220 extending leftward from an end on the proximal end RB side of the second base portion 210, and one end in the width direction of the second base portion 210 to the left. It mainly has a fourth side wall portion 230 extending and a sixth side wall portion 240 extending leftward from the other end in the width direction of the second base portion 210.

An insertion hole 211 and an engagement hole 212 are formed in the second base portion 210. Specifically, a convex portion 213 which is convex toward the left side is formed in the second base portion 210, and the insertion hole 211 and the engagement hole 212 are formed in the convex portion 213.
The insertion hole 211 is a hole through which the bolt 90 (see FIG. 3) is inserted. The insertion hole 211 is disposed substantially at the center of the convex portion 213, and formed in a substantially circular shape centering on the rotation center RC. The peripheral edge portion of the insertion hole 211 is a flange portion 211A that protrudes to the right (see FIG. 6).

  The engagement hole 212 is a hole with which the convex portion 21A of the shaft 20 engages. A plurality of engaging holes 212, specifically, four engaging holes 212 are provided corresponding to the plurality of convex portions 21A of the shaft 20, and each of the engaging holes 212 is formed in a substantially arc shape around the rotation center RC. . The four engagement holes 212 are arranged at substantially equal intervals on the circumference around the rotation center RC around the insertion hole 211 so as to overlap with the through hole 112 of the main frame 100 when viewed from the left and right direction. ing.

  The protrusion 213 has a size substantially overlapping the recess 113 of the main frame 100 when viewed in the left-right direction, and is formed in a substantially circular shape centered on the rotation center RC. The convex portion 213 includes the second base portion 210, a first portion 213A disposed to be displaced to the left, and a second portion 213B connecting the peripheral portion of the substantially circular first portion 213A and the second base portion 210. Have. The first portion 213A is formed in parallel with the second base portion 210. In addition, reinforcement portions 213C that protrude to the left from the second portion 213B and the second base portion 210 and extend in the longitudinal direction are formed at the ends on both sides in the longitudinal direction of the second portion 213B.

  As shown in FIG. 5, the reinforcing frame 200 is provided to overlap the main frame 100 closer to the proximal end RB than the plurality of lightening holes 114. Specifically, the reinforcing frame 200 is disposed around the rotation axis line RL, and is provided so as to overlap the portion on the base end RB side of the main frame 100. To explain further, as shown in FIG. 6 and FIG. 7, the reinforcing frame 200 is disposed on the opposite side of the bracket 10 (supporting member) of the one-way clutch 1 across the main frame 100 around the rotation axis line RL. It is provided to overlap the base end of the main frame 100.

  Specifically, the reinforcing frame 200 is provided so that the second base portion 210 overlaps the base end portion of the first base portion 110 on the opposite side of the first base portion 110 to the bracket 10 of the one-way clutch 1. Further, the reinforcing frame 200 is provided such that the second side wall portion 220 overlaps the first side wall portion 120 at the inner side in the longitudinal direction of the first side wall portion 120. In the reinforcing frame 200, the fourth side wall 230 is provided so as to overlap the third side wall 130 at the inner side in the width direction of the third side wall 130, and the sixth side wall 240 is in the width direction of the fifth side wall 140. It is provided so as to overlap the fifth side wall portion 140 inside.

  As shown in FIG. 5, the reinforcing frame 200 and the main frame 100 are connected to each other by a first connecting portion C1, a second connecting portion C2 and a third connecting portion C3. Specifically, at the base end of the reinforcing frame 200 and the main frame 100, a portion closer to the base end RB than the rotation center RC is mutually connected by the first connecting portion C1, and the rotation center RC The portion on the tip end RA side is connected to each other by the second connecting portion C2 and the third connecting portion C3.

  As shown in FIG. 7, the first connection portion C <b> 1 is a portion where the first folded portion 150 formed on the main frame 100 and the second folded portion 250 formed on the reinforcing frame 200 overlap. The first folded portion 150 is a portion extending from the end of the first side wall portion 120 and being folded back so that the tip end faces the first base portion 110, and the second folded portion 250 is an end of the second side wall portion 220 Extending from the front end portion to the second base portion 210 so as to overlap the first folded portion 150.

  As shown in FIG. 8, the second connection portion C <b> 2 is a portion where the third folded portion 160 formed in the main frame 100 and the fourth folded portion 260 formed in the reinforcing frame 200 overlap. The third folded portion 160 is a portion extending from the end of the third side wall portion 130 and being folded back so that the tip end faces the first base portion 110, and the fourth folded portion 260 is an end of the fourth side wall portion 230 Extending from the tip end of the second base portion 210 toward the second base portion 210 and overlapping the third folded portion 160.

  Further, the third connecting portion C3 is a portion where the fifth folded portion 170 formed in the main frame 100 and the sixth folded portion 270 formed in the reinforcing frame 200 overlap. The fifth folded portion 170 extends from the end of the fifth side wall portion 140 and is a portion folded back so that the tip end faces the first base portion 110, and the sixth folded portion 270 is an end of the sixth side wall portion 240. Extending from the tip end of the second base portion 210 toward the second base portion 210 and overlapping the fifth folded portion 170.

Here, connection of the main frame 100 and the reinforcing frame 200 will be described.
As shown in FIG. 7 and FIG. 8, the main frame 100 is in a state before being connected to the reinforcing frame 200, the first extension 121 extending leftward from the end of the first side wall 120, and the third side wall A third extension 131 extending to the left from the end of 130 and a fifth extension 141 extending to the left from the end of the fifth side wall 140 are included. In addition, the reinforcing frame 200 may extend from the end of the second side wall 220 leftward from the end of the second side wall 220 and the end from the end of the fourth side wall 230 left before being connected to the main frame 100. A fourth extension portion 231 and a sixth extension portion 241 extending leftward from an end of the sixth side wall portion 240 are provided.

  When the main frame 100 and the reinforcing frame 200 are connected, first, the second extending portion 221 overlaps the inside in the longitudinal direction of the first extending portion 121, and the fourth extending portion 231 of the third extending portion 131 The reinforcing frame 200 is disposed so as to overlap the inside of the main frame 100 such that the widthwise inner side is overlapped and the sixth extending portion 241 overlaps the widthwise inner side of the fifth extending portion 141. Then, the overlapping extension portions 121 and 221 are bent inward in the longitudinal direction so that the tip end faces the second base portion 210, to form a first connection portion C1. Further, the overlapping extension portions 131 and 231 are bent inward in the width direction so that the front end faces the second base portion 210 to form a second connecting portion C2, and the overlapping extension portions 141 and 241 are The third connecting portion C3 is formed by bending inward in the width direction such that the tip end faces the second base portion 210. Thereby, the main frame 100 and the reinforcement frame 200 are connected by the connection parts C1 to C3.

  The connection portions C1 to C3 are each bent in a substantially arc shape in cross section. As a result, the tip end C11 of the first connecting portion C1 (the tip end of the first folded back portion 150 and the second folded back portion 250) has a gap C12 between itself and the second side wall 220. In addition, the tip end C21 of the second connecting portion C2 (the tip end of the third folded portion 160 and the fourth folded portion 260) has a gap C22 between the fourth side wall 230 and the third connecting portion The tip end C31 of the C3 (the tip end of the fifth folded portion 170 and the sixth folded portion 270) has a gap C32 between itself and the sixth side wall portion 240. As shown in FIG. 5, the second connection portion C <b> 2 and the third connection portion C <b> 3 are provided so as to be substantially symmetrical in the width direction at positions opposed in the width direction.

  Further, the armrest frame RF is provided with a stopper portion 300 which is in contact with the bracket 10 of the one-way clutch 1 fixed to the side frame S11 to restrict the rotation range of the armrest R. Specifically, the stopper portion 300 restricts the downward rotation of the arm rest R relative to the position A of the arm rest R when the stopper portion 300 abuts on the first rotation restriction portion 11F (see FIG. 3) provided on the bracket 10. When it abuts on a second rotation restricting portion 11R (see FIG. 3) provided on the rear end of the arm rest R, the rotation of the arm rest R to the rear than the position C is restricted.

  The stopper portion 300 is provided within the range of the bracket 10 as viewed in the left-right direction. Specifically, the stopper portion 300 is provided so as to fit inside the contour of the base 11 of the bracket 10. Further, the stopper portion 300 is provided between the rotation center RC and the tip end RA in the longitudinal direction. More specifically, the stopper portion 300 is provided between the convex portion 213 and the first bending portion 110D and at a position between the second connecting portion C2 and the third connecting portion C3.

  As shown in FIG. 7 and FIG. 8, the stopper portion 300 is configured to have a protrusion 310. The protrusion 310 is provided so as to protrude to the right from the armrest frame RF. Specifically, the protrusion 310 is provided as a hollow protrusion protruding rightward from the second base portion 210 of the reinforcing frame 200. The protrusion 310 protrudes to the right of the first base portion 110 of the main frame 100 through the substantially rectangular through hole 320 formed in the first base portion 110 of the main frame 100. Configured.

  As shown in FIG. 9, the one-way clutch 1 is a mechanism for switching the state of the armrest R between the locked state and the unlocked state, and is provided between the side frame S11 and the armrest R (see FIG. 1). ). In the locked state, the one-way clutch 1 restricts downward rotation of the armrest R, but permits upward rotation, and in the unlocked state, vertically rotates the armrest R. It is configured to allow.

  The one-way clutch 1 includes a bracket 10 as a support member fixed to the side frame S11, a shaft 20 rotatable with respect to the bracket 10, and a lock spring fitted to be fitted to the outer peripheral surface of the shaft 20 It mainly includes a nut 51 to which a holding portion 40, a bolt 90 (see FIG. 3) is fastened, and a fixing member 52.

  The bracket 10 is a member that accommodates the shaft 20, the lock spring 30, and the like, and rotatably supports the armrest R (armrest frame RF), and is disposed between the side frame S11 and the armrest frame RF. The bracket 10 is formed by processing a metal plate and mainly includes a base 11 and four side wall portions 12A to 12D extending rightward from the front, rear, upper and lower ends of the base 11 .

  The base 11 is formed in a substantially rectangular plate shape, and a hole 11A for inserting the shaft 20 is formed in a substantially central portion thereof. The peripheral portion of the hole 11A is a flange portion 11B that protrudes to the right by burring or the like. Further, as shown in FIG. 3, the base 11 is provided with a first convex portion 11C provided so as to project to the left side (the armrest frame RF side) at a position substantially in front of the hole 11A, and a substantially rear side of the hole 11A. And a second convex portion 11D provided so as to protrude leftward at the position. When viewed in the left-right direction, the first convex portion 11C and the second convex portion 11D are disposed so as to sandwich the hole 11A, and are each formed in a substantially arc shape.

  As shown in FIG. 10, the first convex portion 11C is configured such that the upper end thereof abuts against the stopper portion 300 (projecting portion 310) of the armrest frame RF to restrict the downward rotation of the armrest frame RF. It becomes the rotation control part 11F. On the other hand, the upper end of the second convex portion 11D is in contact with the stopper portion 300 of the armrest frame RF to form a second rotation restricting portion 11R that restricts the rearward rotation of the armrest frame RF. . In addition, the second convex portion 11D has a deformation restricting portion 500 as a first restricting portion on the left surface which is a portion facing the armrest frame RF in the left-right direction.

  The deformation restricting portion 500 is a surface on the left side of the second convex portion 11D formed on the bracket 10, and the armrest R is in the use position, specifically, the drawn state (position A in FIG. 2A). Sometimes, it is provided at a portion located closer to the proximal end RB than the rotation center RC. In other words, the deformation restricting portion 500 is provided at the lower end portion of the left side surface of the second convex portion 11D. Further, when the armrest R is in the drawn state, the deformation restricting portion 500 is provided on a straight line L1 connecting the rotation center RC and the base end RB of the armrest frame RF when viewed from the left and right direction. Furthermore, when the armrest R is in the pulled-out state, the deformation restricting portion 500 is disposed at a position overlapping the proximal end RB of the armrest frame RF when viewed from the left-right direction.

  The second convex portion 11D has a substantially arc shape in which an upper portion having the second rotation restricting portion 11R and a lower portion having the deformation restricting portion 500 are connected in the circumferential direction of the hole 11A. Therefore, the deformation restricting portion 500 and the second rotation restricting portion 11R are formed as a continuous series of convex portions. In the present embodiment, the second rotation restricting portion 11R corresponds to a "second restricting portion".

  As shown in FIG. 9, the side wall portions 12A to 12D are formed so as to cover the shaft 20, the lock spring 30, and the like from the front, rear, upper and lower sides. The bracket 10 is fixed to the side frame S11 by fixing the right ends of the rear side and upper and lower side wall portions 12B to 12D to the side frame S11 by welding or the like. That is, the bracket 10 is also a member for attaching the armrest frame RF, which the bracket 10 rotatably supports, to the seat frame SF as a seat frame.

  The shaft 20 is a substantially cylindrical member made of metal, and the first portion 21 on the left side is formed to have a diameter slightly smaller than that of the second portion 22 on the right side, and can be inserted into the hole 11A of the bracket 10 . At the left end of the first portion 21 in the axial direction of the lock spring 30 (the direction in which the rotation axis RL extends), a plurality of, specifically, four convex portions 21A projecting toward the armrest frame RF are provided It is done. The four convex portions 21A are formed in a substantially arc shape centered on the rotation center RC, and the rotation center RC corresponding to the through hole 112 and the engagement hole 212 (see FIG. 4) of the armrest frame RF. Are arranged at substantially equal intervals on the circumference of the circle.

  Moreover, among the end portions on the left side of the first portion 21, a portion between the convex portions 21A is, as shown in FIG. 6, a plurality of bent portions 21B bent at approximately 90 ° inward in the radial direction of the shaft 20. It has become. A nut 51 is disposed inside the shaft 20, and the nut 51 is joined to the plurality of bent portions 21B by welding or the like.

  In the shaft 20, four projections 21A (see FIG. 4) are formed in the reinforcing frame 200 through the through hole 410 formed in the washer 400 and the through hole 112 formed in the main frame 100, respectively. It is engaged with the mating hole 212. The shaft 20 is fixed to the armrest frame RF (armrest R) by fastening the bolt 90 to the nut 51 through the insertion hole 211 of the reinforcement frame 200, the insertion hole 111 of the main frame 100, and the washer 400. . Thereby, the armrest frame RF and the shaft 20 can be integrally rotated with respect to the bracket 10. Although not shown, the through hole 410 of the washer 400 is formed in a substantially arc shape like the through hole 112 and the engagement hole 212, and a plurality of the through holes 410 are substantially circular on the circumference around the rotation center RC. It is arranged at intervals.

  The left end face 22B of the second portion 22 can contact the end of the flange portion 11B. This makes it possible to prevent the armrest frame RF from coming off the bracket 10 in the left direction. Further, as shown in FIG. 9, on the end face 22A on the left side of the second portion 22, an action part 23 projecting from the end face 22A and a cam part 24 are provided.

  The action portion 23 has a pressing surface 23A for pressing the free end portion 33 described later of the lock spring 30 in the circumferential direction of the shaft 20 to expand the diameter of the lock spring 30. The pressing surface 23A extends in the axial direction of the lock spring 30 and is a plane substantially orthogonal to the circumferential direction.

  The cam portion 24 is formed to project from the end face 22A of the shaft 20 more than the action portion 23, and is disposed at an interval in the circumferential direction of the shaft 20 with respect to the pressing surface 23A of the action portion 23. The cam portion 24 is a cam surface 24A that is inclined so as to approach the pressing surface 23A as the surface facing the pressing surface 23A in the circumferential direction is separated from the end surface 22A of the shaft 20.

  The lock spring 30 is a metal coil spring, and is disposed between the base 11 of the bracket 10 and the side frame S11 in a state of being fitted to the outer peripheral surface of the shaft 20. The lock spring 30 has a coil portion 31 fitted to the outer peripheral surface of the shaft 20, a fixed end 32 fixed to the bracket 10 by a fixing member 52, and a free end 33 not fixed to the bracket 10. There is.

  The coil portion 31 is wound in a winding direction in a direction in which the armrest R is pivoted downward as the fixed end 32 approaches the free end 33. Thus, in the locked state, the lock spring 30 restricts the downward rotation of the armrest R by winding and tightening the shaft 20 with the coil portion 31. On the other hand, the upward pivoting of the armrest R in the locked state is permitted as the frictional force between the shaft 20 and the coil portion 31 loosens the coil portion 31.

  The fixed end 32 extends radially outward of the coil portion 31 from the left end of the coil portion 31. The fixing member 52 is formed by processing a metal plate, and is provided on both sides of an engaging portion 52A having a substantially U-shaped cross sectional view that can be engaged with the fixed end 32 and the engaging portion 52A. And a fixing portion 52B. The fixed end 32 is fixed to the bracket 10 by fixing the fixing portion 52B to the surface on the right side of the base 11 by welding or the like in a state in which the engaging portion 52A is engaged from the right side.

  The free end 33 has a bent portion 33A bent in a substantially semicircular shape from the end 31A on the right side of the coil portion 31 toward the radial direction, and a subject extending substantially linearly from the bent portion 33A radially outward And a pressing portion 33B. The free end portion 33 extends away from the coil portion 31 as it goes from the end portion 31A of the coil portion 31 to the tip end in the natural state where the free end portion 33 is not engaged with the holding portion 40. When engaged, the pressed portion 33B is slightly bent so as to approach the coil portion 31 (see FIG. 12C).

  The holding portion 40 is provided on the side wall portion 12A on the front side of the bracket 10. Specifically, the holding portion 40 is integrally formed with the bracket 10 by bending the vicinity of the vertically central portion of the right end of the side wall portion 12A toward the rear and the left. The holding portion 40 mainly has a first portion 40A extending rearward from the right end of the side wall portion 12A and a second portion 40B extending leftward from the lower portion of the rear end of the first portion 40A. ing. As shown in FIG. 11, the holding portion 40 is formed with a first holding surface 41, a second holding surface 42 and a third holding surface 43 which engage with the free end 33 of the lock spring 30.

  The first holding surface 41 is an upper surface of the second portion 40B, and in the unlocked state, the lock spring 30 is engaged with the free end portion 33 of the lock spring 30 in the circumferential direction of the coil portion 31 (not shown). The diameter is kept larger than in the locked state. The first holding surface 41 is formed in a plane substantially parallel to the axial direction of the lock spring 30.

  The second holding surface 42 is a surface on the left side of the second portion 40B and abuts the free end 33 in the axial direction of the lock spring 30 in the locked state to engage the free end 33 with the first holding surface 41. It is kept in the state of being bent in the axial direction, specifically, in the left direction, than when it is engaged. The second holding surface 42 extends downward from the left end of the first holding surface 41 and is formed in a plane substantially perpendicular to the axial direction of the lock spring 30.

  The third holding surface 43 is a portion of the left surface of the first portion 40A above the first holding surface 41, and abuts the free end 33 in the axial direction of the lock spring 30 in the unlocked state. . Similar to the second holding surface 42, the third holding surface 43 is formed in a planar shape substantially orthogonal to the axial direction of the lock spring 30.

  Next, the operation of the one-way clutch 1 will be described. In FIGS. 12 to 17 to be referred to, (a) shows the position of the arm rest R, and (b) shows the shaft 20, the lock spring 30 and the holding portion 40 as viewed from the right side (c ) Is a view of the shaft 20, the lock spring 30, and the holding portion 40 as viewed from the front side. In addition, in (b), the hatching of the dot is given to the action part 23.

  As shown in FIGS. 12 (a) to 12 (c), when the armrest R is in the pulled out state (position A), the free end 33 of the lock spring 30 is held by the second holding surface 42 of the holding portion 40. As a result, the free end 33 is held so as to be bent inward in the axial direction of the lock spring 30 than in the natural state (see the two-dot chain line).

  Then, as shown in FIGS. 13A to 13C, when the armrest R is turned upward from the position A to the position B, the shaft 20 is turned counterclockwise in the figure. Then, the pressing surface 23A of the action portion 23 provided on the shaft 20 abuts on the free end 33 of the lock spring 30, and pushes the free end 33 in the circumferential direction. As a result, the lock spring 30 is moved toward the direction in which the free end 33 slides on the second holding surface 42 and approaches the first holding surface 41, and the coil portion 31 is gradually loosened and the diameter is increased. To go.

  Then, as shown in FIGS. 14A to 14C, when the armrest R is pivoted to the position B, the free end 33 is disengaged from the second holding surface 42. Then, the free end portion 33 recovers its deflection and abuts on the third holding surface 43, and is separated from the pressing surface 23A. The free end portion 33 is pressed against the first holding surface 41 by a force of the coil portion 31 for winding and tightening the shaft 20, and engages with the first holding surface 41 in the circumferential direction of the coil portion 31. As a result, the lock spring 30 is held in a state in which the diameter of the coil portion 31 is larger than that in the locked state. Thus, when the armrest R is rotated from position A to position B, the state of the armrest R switches from the locked state to the unlocked state.

  Thereafter, as shown in FIGS. 15 (a) to 15 (c), when the armrest R is rotated from position B to position C, the action portion 23 rotates counterclockwise as shown in FIG. And moves to a position downstream of the free end 33 in the counterclockwise direction in the drawing through the axially inner side of the free end 33 (the lower side of the free end 33 in (c)). At this time, since the free end portion 33 is engaged with the first holding surface 41, the coil portion 31 is held in the expanded state, so that the unlocked state is maintained. Also, when the arm rest R is turned from the position C to a position in front of the position A, the free end 33 is engaged with the first holding surface 41, whereby the unlocked state is maintained.

  As shown in FIGS. 16 (a) to 16 (c), when the armrest R is rotated from position C to a position before position A, the shaft 20 rotates clockwise, and a cam provided on the shaft 20 The cam surface 24 A of the portion 24 abuts on the free end 33. Then, as shown in FIGS. 17A to 17C, when the armrest R is rotated from the position before the position A to the position A, the free end 33 is pushed inward in the axial direction by the cam surface 24A. Thus, the free end 33 moves inward in the axial direction while being flexed and is separated from the first holding surface 41.

  When the free end 33 is separated from the first holding surface 41, as shown in FIGS. 12 (a) to 12 (c), the free end 33 is secondly moved by the force that the coil portion 31 tries to tighten the shaft 20. While sliding on the holding surface 42 and moving in a direction away from the first holding surface 41, the coil portion 31 winds and tightens the shaft 20. As a result, the state of the armrest R switches from the unlocked state to the locked state.

Next, the operation and effect when a large load is applied to the armrest R in the pulled-out state (use position) from the inside in the left-right direction will be described.
When a large load is input from the inside in the left-right direction of the vehicle seat S to the leading end of the armrest R in the drawn state as shown in FIG. 1, the armrest frame RF is a bracket 10 by bolts 90 as shown in FIG. The distal end RA side of the bolt 90 is deformed outward in the left-right direction and the proximal end RB side of the bolt 90 is deformed inward in the left-right direction so as to rotate clockwise in FIG. Then, the base end of the armrest frame RF abuts on the deformation restricting portion 500 provided on the bracket 10. As a result, further inward lateral deformation of the proximal end of the armrest frame RF is suppressed, and further outward lateral deformation of the distal end of the armrest frame RF is also restricted. Excessive deformation of the vehicle seat S so as to bend outward in the left-right direction can be suppressed.

  Further, in the present embodiment, the base end of the armrest frame RF and the deformation restricting portion 500 of the bracket 10 are on the straight line L1 (see FIG. 10) connecting the rotation center RC of the armrest frame RF and the base end RB. Since it contacts, when the base end part of armrest frame RF contacts modification control part 500, it can control that armrest frame RF shakes in the horizontal direction. As a result, since the base end portion of the armrest frame RF can be stably supported by the deformation restricting portion 500, excessive deformation of the armrest frame RF can be effectively suppressed by the deformation restricting portion 500.

  Further, in the present embodiment, a portion close to the proximal end RB of the armrest frame RF, in other words, a portion far from the bolt 90 of the proximal end of the armrest frame RF abuts on the deformation restricting portion 500 provided on the bracket 10 As a result, the force input from the proximal end of the armrest frame RF to the deformation restricting portion 500 can be reduced as much as possible to effectively suppress the deformation of the deformation restricting portion 500 itself. As a result, since the base end portion of the armrest frame RF can be firmly supported by the deformation restricting portion 500, excessive deformation of the armrest frame RF can be more effectively suppressed by the deformation restricting portion 500.

  Further, in the present embodiment, the main end of the main frame 100 and the reinforcing frame 200 are separated because the main frame 100 and the portion on the base end RB side of the reinforcing frame 200 are connected by the first connecting portion C1. As a result, the rigidity of the armrest frame RF can be improved. When a large load is input to the armrest R in the pulled-out state from the inside in the left-right direction and a portion on the tip end RA side of the main frame 100 is deformed outward in the left-right direction, the base end RB side of the main frame 100 is The part tries to move away from the reinforcing frame 200 in an attempt to deform inward in the left-right direction, but the main frame 100 is reinforced by the reinforcing frame 200 by the main frame 100 and the reinforcing frame 200 being connected by the first connecting portion C1. be able to. Thereby, it is possible to suppress further deformation in the lateral direction inside of the base end part of the main frame 100, and as a result, it is possible to suppress further deformation in the lateral direction outside the tip part of the main frame 100. Therefore, excessive deformation of the mainframe 100 can be effectively suppressed as a whole. Such an effect is particularly remarkable when the thickness of the main frame 100 is reduced to reduce the weight of the armrest frame RF.

Further, according to the embodiment described above, the following effects can be obtained.
Since the armrest frame RF includes the main frame 100 and the reinforcing frame 200 having a thickness greater than that of the main frame 100, the reinforcing frame 200 is provided on the base end of the main frame 100. The rigidity of the portion on the end RB side can be secured. On the other hand, since the main frame 100 can be made thinner by reducing the thickness thereof, the armrest frame RF can be made lighter as a whole. Furthermore, since the armrest frame RF has the shaft 20 fixed to the reinforcing frame 200, the reinforcing frame 200 can ensure rigidity around the shaft 20 (around the axis) of the armrest frame RF. Moreover, in addition to the fact that the thickness of the main frame 100 can be reduced to reduce the weight of the armrest frame RF as a whole, the one-way clutch 1 is provided on the side frame S11 and is not provided on the armrest R. It is possible to reduce the weight as a whole.

  In addition, since a mechanism for switching between the locked state and the unlocked state such as the one-way clutch 1 is not provided in the armrest R, when the armrest frame RF is covered with a skin material and the foam resin is injected, the mechanism This eliminates the need for parts (for example, the resin cover of WO 2014/024709, etc.) for covering and protecting the mechanism for preventing the inflow of the foamed resin. Thereby, the number of parts of armrest R can be reduced.

  Further, as shown in FIG. 4, since the convex portion 21A of the shaft 20 engaged with the engagement hole 212 provided in the reinforcing frame 200 passes through the through hole 112 provided in the main frame 100, the main frame 100 And the position of the reinforcing frame 200 can be defined. Thereby, the workability at the time of assembling the armrest R can be improved. In addition, since a plurality of through holes 112 and engagement holes 212 are provided and arranged on the circumference centered on the rotation center RC, the positions of the main frame 100 and the reinforcement frame 200 can be well defined. it can. Thereby, the workability at the time of assembling armrest R can be improved more.

  Further, since the convex portion 213 is formed on the reinforcing frame 200 and the reinforcing portion 213C is formed on both ends in the longitudinal direction of the convex portion 213, the rigidity in the vicinity of the shaft 20 of the armrest frame RF can be further improved. it can. Further, as shown in FIG. 5, since the convex portion 115 is formed on the main frame 100, the rigidity of the main frame 100 itself can be improved.

  Further, as shown in FIG. 7, since the reinforcing frame 200 and the main frame 100 are connected by the first connecting portion C1, which is a portion where the first folded portion 150 and the second folded portion 250 overlap, welding etc. The main frame 100 and the reinforcing frame 200 can be connected without doing this, and the rigidity of the armrest frame RF can be improved. The same applies to the second connecting portion C2 and the third connecting portion C3.

  In addition, since the tip end C11 of the first connecting portion C1 has a gap C12 between the first connection portion C1 and the second side wall 220, comparison is made with the case where the folded back portions 150 and 250 and the second side wall 220 are folded back to contact Thus, the rigidity of the armrest frame RF can be further improved. In addition, when the armrest frame RF is covered with a skin material and the foam resin is injected to form the armrest R, the foam resin can be filled in the space C12 because there is the space C12. Thereby, the shift | offset | difference of the pad material which the foamed resin solidified can be formed can be suppressed. The same applies to the second connecting portion C2 and the third connecting portion C3.

  Further, as shown in FIG. 8, the reinforcing frame 200 and the main frame 100 are connected to each other by the second connecting portion C2 and the third connecting portion C3, and the second connecting portion C2 and the third connecting portion C3 are in the width direction. The main frame 100 and the reinforcing frame 200 can be firmly connected to each other. Thereby, the rigidity of the armrest frame RF can be further improved. If a large load is input to the armrest R in the pulled-out state from the inside in the left-right direction and a portion on the tip end RA side of the main frame 100 is deformed outward in the left-right direction, the part is separated from the reinforcing frame 200 However, the main frame 100 can be reinforced by the reinforcing frame 200 by being connected by the connecting portions C2 and C3. As a result, since it is possible to suppress further deformation in the left and right direction outside of the tip end portion of the main frame 100, excessive deformation of the main frame 100 can be suppressed more effectively.

  Further, since the stopper portion 300 is provided between the second connection portion C2 and the third connection portion C3, the stopper portion 300 can be disposed compactly. Thereby, armrest R can be miniaturized. Further, since the stopper portion 300 is between the second connecting portion C2 and the third connecting portion C3 facing the width direction and connecting the main frame 100 and the reinforcing frame 200, the main frame 100 by the force applied to the stopper portion 300. And the reinforcing frame 200 can be suppressed from shifting.

  Further, since the protrusion 310 constituting the stopper 300 is provided on the reinforcing frame 200, the rigidity of the protrusion 310 can be improved as compared with the case where the protrusion is provided on the main frame 100. . In addition, since the stopper portion 300 can be configured by the reinforcing frame 200 having a plate thickness thicker than that of the main frame 100, even when a large force is applied to the armrest R in the rotational direction, Since the rotation can be stably regulated, the sense of rigidity when the arm is placed on the armrest R can be improved. In addition, since the reinforcing frame 200 can receive the force applied to the stopper portion 300, the thickness of the main frame 100 can be further reduced. Thereby, the weight of the armrest R can be further reduced. In addition, since the protrusion 310 protrudes to the bracket 10 side through the through hole 320 of the main frame 100, the protrusion 310 of the reinforcing frame 200 can be made of the main frame 100 when the main frame 100 and the reinforcing frame 200 are assembled. By engaging the through holes 320, the position of the reinforcing frame 200 relative to the main frame 100 can be determined.

  Further, as shown in FIG. 3, since the deformation restricting portion 500 and the second rotation restricting portion 11R are formed as a continuous second convex portion 11D, the deformation restricting portion 500 and the second rotation restricting portion 11R are formed. The bracket 10 can have a simple configuration as compared to the case where it is formed as separate convex portions. Further, the deformation restricting portion and the second rotation restricting portion may be provided by attaching a block-shaped member or the like configured as a separate member to the base 11 of the bracket 10, but in this case, the deformation restricting portion By forming the second rotation restricting portion as a continuous convex portion (by forming a single member), the number of parts constituting the bracket 10 can be reduced.

  Further, as shown in FIG. 5, since the stopper portion 300 is provided between the rotation center RC and the tip end RA, the distance from the stopper portion 300 to the tip end RA is set to the distance from the rotation center RC to the tip end RA. It can be shorter than the distance. As a result, even if a force is applied to the armrest R in a state where the rotation range of the armrest R is restricted by the stopper portion 300, the armrest frame RF is hardly bent, so the sense of rigidity when the arm is placed on the armrest R is improved. be able to. In addition, since the required rigidity is reduced, the thickness of the main frame 100 can be made thinner, whereby the weight of the armrest R can be further reduced.

  Further, since the main frame 100 has the plurality of lightening holes 114, the weight of the armrest R can be further reduced. Further, since the lightening hole 114 is not provided in the portion of the main frame 100 where the reinforcing frame 200 is provided, the rigidity in the vicinity of the shaft 20 of the armrest frame RF can be improved. In addition, the lightening hole 114 is a portion where the first portion 110A and the second portion 110B of the first base portion 110 bend (first bending portion 110D), and a portion where the second portion 110B and the third portion 110C bend. Since it is formed avoiding the (second bent portion 110E), the rigidity can be enhanced while achieving weight reduction of the armrest frame RF.

  Further, as shown in FIG. 9, since the holding portion 40 for holding the lock spring 30 in the diameter-expanded state is provided on the bracket 10 fixed to the side frame S11, the holding portion is different from the bracket The number of parts of the one-way clutch 1 can be reduced as compared with the configuration provided in the members of the above. Further, since the holding portion 40 is integrally formed with the bracket 10, the number of parts of the one-way clutch 1 can be further reduced as compared with a configuration in which the holding portion formed as a separate part is attached to the bracket and provided. Can.

  Further, as shown in FIG. 6, since the nut 51 is disposed on the inner side of the shaft 20, the one-way clutch 1 can be miniaturized as compared with a configuration in which the nut is disposed around the shaft. . Further, since the nut 51 is joined to the bent portion 21B formed by bending a part of the end of the shaft 20 inward, it is possible to omit parts for joining the nut 51 to the shaft 20. Thereby, the number of parts of the one-way clutch 1 can be reduced.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. About a specific structure, it can change suitably in the range which does not deviate from the meaning of invention as follows.

  For example, in the embodiment, the fixed end 32 of the lock spring 30 is fixed to the bracket 10 by the fixing member 52, but the fixed end 32 engages with a recess formed in the base 11 of the bracket 10. May be fixed to the bracket 10. The fixed end 32 may also be fixed to the bracket 10 by welding.

  Further, in the above embodiment, the stopper portion 300 is configured such that the projecting portion 310 provided in the reinforcing frame 200 protrudes from the main frame 100 through the through hole 320 formed in the main frame 100. However, it is not limited to this. For example, referring to FIG. 8, the stopper portion 300 may have a first protrusion 310 provided on the right side of the reinforcing frame 200 and a hollow second protrusion provided on the right side of the main frame 100. And a double-walled structure in which the first protrusion 310 is fitted in a recess formed on the back of the second protrusion. Such a stopper portion 300 can be formed by drawing or the like after the main frame 100 and the reinforcing frame 200 are overlapped and connected. And according to such a configuration, the rigidity of the stopper portion 300 can be improved, so that the rotation of the armrest R can be stably regulated, and a sense of rigidity when the arm is placed on the armrest R can be obtained. It can be improved. In the above embodiment, the stopper portion 300 is integrally formed with the armrest frame RF. However, the armrest frame RF may be provided with a stopper portion formed as a separate member from the armrest frame RF.

  Moreover, in the said embodiment, although the holding | maintenance part 40 was integrally formed by the bracket 10, you may attach and provide the holding | maintenance part comprised as another member with the bracket 10 at the bracket 10. FIG.

  Moreover, in the said embodiment, although the shaft 20 and the reinforcement frame 200 were fixed by fastening of the nut 51 and the volt | bolt 90, a shaft and a reinforcement frame may be fixed by welding etc., for example.

  Further, in the embodiment, although the deformation restricting portion 500 as the first restricting portion and the second rotation restricting portion 11R as the second restricting portion are formed as the continuous second convex portion 11D, the first restricting portion The portion and the second restricting portion may be formed as separate convex portions.

  In the above embodiment, the deformation restricting portion 500 as the first restricting portion is disposed at a position overlapping the proximal end RB of the armrest frame RF, but the first restricting portion is, for example, the proximal end of the armrest frame. The armrest frame may be disposed so as to overlap only the portion between the pivoting center and the proximal end of the armrest frame.

  In the embodiment, the deformation restricting portion 500 as the first restricting portion is disposed on the straight line L1 connecting the rotation center RC of the armrest frame RF and the base end RB, but is not limited to this. For example, to explain with reference to FIG. 10, the first restricting portions may be disposed at two places in total, one at each of the upper and lower sides of the straight line L1 across the straight line L1. In addition, the first restricting portion may be disposed at three or more places.

  Moreover, in the said embodiment, although the position A (drawing state) of Fig.2 (a) was illustrated as a use position of armrest R, it is not limited to this. For example, the use position is a lock state in which the downward rotation is restricted by the one-way clutch 1 at the time of the storage operation of moving the drawer state to the storage state, from position A to position B in FIG. It may be in the range of That is, the first restricting portion may be provided so as to abut on the armrest frame when a large load is input from the inside in the left-right direction to the armrest in the range from the position A to the position B. For example, to explain with reference to FIG. 10, in the second convex portion 11D having the deformation restricting portion 500 as the first restricting portion, the lower side portion is along the circumferential direction of the hole 11A, as compared with the form shown in FIG. It may also extend long. The second convex portion 11D may be connected to the first convex portion 11C below the rotation center RC to form a convex portion integral with the first convex portion 11C.

  Moreover, in the said embodiment, although the deformation control part 500 as a 1st control part was provided in the bracket 10, it is not limited to this. For example, the first restricting portion may be provided not on the bracket but on the armrest frame. Specifically, the first restricting portion is provided on a portion of the armrest frame facing the bracket in the left-right direction and protruding toward the bracket on a portion positioned on the base end side with respect to the rotation center. It may be The first restricting portion may be provided on both the armrest frame and the bracket.

  Moreover, in the said embodiment, although the main frame 100 and the reinforcement frame 200 were connected by the 1st connection part C1 which is the part which the folding parts 150 and 250 overlapped, a main frame and a reinforcement frame are connected by welding, for example. It may be connected or it may be connected by fastening of a bolt and a nut. The same applies to the second connecting portion C2 and the third connecting portion C3.

  Moreover, in the said embodiment, although the reinforcement frame 200 was arrange | positioned on the opposite side to the bracket 10 on both sides of the main frame 100, a reinforcement frame may be arrange | positioned between a main frame and a bracket.

  Further, in the above embodiment, the armrest frame RF is a two-part configuration having the main frame 100 and the reinforcing frame 200, but the armrest frame may be configured as a single part, or three or more parts It may be composed of

  Moreover, in the said embodiment, although the bracket 10 for attaching the armrest frame RF to the flame | frame of a sheet | seat was illustrated as a support member, the support member may be side frame S11 etc. which comprise the flame | frame of a sheet | seat, for example. As an example, a part of the side frame S11 may be cut and raised to form a shape like the bracket 10 of the embodiment.

  Moreover, in the said embodiment, although the vehicle seat S mounted in a motor vehicle was illustrated as a seat in which armrest R and the one-way clutch 1 are provided, a seat is vehicles other than a motor vehicle, for example, rail cars, ships, aircraft etc. It may be a vehicle seat mounted on the vehicle. Furthermore, the seat is not limited to a seat for a vehicle, and may be, for example, a seat used at home or the like.

  In addition, each element described in the above-described embodiment and modification may be implemented in any combination.

DESCRIPTION OF SYMBOLS 10 Bracket 11D 2nd convex part 11R 2nd rotation control part 100 Main frame 110 1st base part 120 1st side wall part 150 1st folding part 200 reinforcement frame 210 2nd base part 220 2nd side wall part 250 2nd folding part 310 projection 320 through hole
500 Deformation restriction part AR Armrest device C1 1st connecting part C11 Tip part C12 Clearance L1 Straight R Armrest RA tip RB Base end RC Rotation center RF Armrest frame RL Rotation axis SF Seat frame

Claims (11)

An armrest device comprising: an armrest frame; and a support member rotatably supporting the armrest frame,
The armrest frame has a longitudinal end, a proximal end close to the pivot center, and a distal end far from the pivot center,
At least one of the armrest frame and the support member is a portion opposite to the other in the rotational axis direction of the armrest frame, and is positioned on the proximal side with respect to the rotational center when the armrest is in the use position. in a portion, it has a first regulating portion that is provided so as to project to the other side,
The armrest frame is disposed on the main frame and on the opposite side of the support member with the main frame interposed therebetween, and is a plate thicker than the main frame provided to overlap the base end side portion of the main frame With a thick reinforcing frame,
The main frame includes a first base portion, a first side wall portion extending from the proximal end of the first base portion to the opposite side to the support member, and a tip end extending from the end of the first side wall portion And a first folded portion folded back so that the portion faces the first base portion,
The reinforcing frame extends from the end on the proximal end side of the second base portion to the opposite side to the support member from the second base portion provided to overlap the first base portion, and the first side wall portion A second side wall portion overlapping the second side wall portion, and a second folded back portion extending from an end of the second side wall portion and being folded back so that a tip end portion faces the second base portion and overlapping the first back side portion;
The armrest device , wherein the reinforcing frame and the main frame are connected at a portion where the first folded portion and the second folded portion overlap . An armrest device comprising: an armrest frame; and a support member rotatably supporting the armrest frame,
The armrest frame has a longitudinal end, a proximal end close to the pivot center, and a distal end far from the pivot center,
At least one of the armrest frame and the support member is a portion opposite to the other in the rotational axis direction of the armrest frame, and is positioned on the proximal side with respect to the rotational center when the armrest is in the use position. in a portion, it has a first regulating portion that is provided so as to project to the other side,
The armrest frame has a protrusion provided to protrude toward the support member,
The armrest frame is disposed on the main frame and on the opposite side of the support member with the main frame interposed therebetween, and is a plate thicker than the main frame provided to overlap the base end side portion of the main frame With a thick reinforcing frame,
The armrest device , wherein the projecting portion is provided on the reinforcing frame, and protrudes toward the supporting member more than the main frame through a through hole formed in the main frame . When the armrest is in the use position, the first restricting portion is disposed on a straight line connecting the rotation center and the base end of the armrest frame when viewed from the rotation axis direction. The armrest device according to claim 1 or claim 2 . The first restricting portion is provided on the support member, and is disposed at a position overlapping the base end of the armrest frame when viewed from the rotational axis direction when the armrest is in the use position. The armrest device according to any one of claims 1 to 3, characterized in that: The reinforcing frame and the previous SL mainframe, portions of the proximal side of the rotation center is connected,
The armrest device according to any one of claims 1 to 4, wherein the reinforcing frame is disposed inside the contour of the support member when viewed from the rotation axis direction . The main frame includes a first base portion, a first side wall portion extending from the proximal end of the first base portion to the opposite side to the support member, and a tip end extending from the end of the first side wall portion And a first folded portion folded back so that the portion faces the first base portion,
The reinforcing frame extends from the end on the proximal end side of the second base portion to the opposite side to the support member from the second base portion provided to overlap the first base portion, and the first side wall portion A second side wall portion overlapping the second side wall portion, and a second folded back portion extending from an end of the second side wall portion and being folded back so that a tip end portion faces the second base portion and overlapping the first back side portion;
The armrest device according to claim 2 , wherein the reinforcing frame and the main frame are connected at a portion where the first folded portion and the second folded portion overlap. The armrest device according to claim 1 or 6, wherein a tip end portion of the first folded portion and the tip end portion of the second folded portion have a gap between the first folded portion and the second side wall portion. The armrest according to claim 1 , wherein the reinforcing frame has a projecting portion provided to project toward the support member more than the main frame through the through hole formed in the main frame. apparatus. The first restricting portion is provided on the support member, and protrudes in the direction of the pivot axis toward the armrest frame side relative to a washer disposed between the armrest frame and the support member. The armrest device according to any one of claims 1 to 8, characterized in that. The armrest device according to claim 6 or 8, wherein the second side wall portion, the second folded back portion, and the projecting portion are disposed to sandwich the rotation center. A vehicle seat comprising the armrest device according to any one of claims 1 to 10.

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