JP2007091080A - Seat back moving mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce pulling up operating force of a seat back. <P>SOLUTION: One end of a strap 20 is connected to a back surface 14A of the seat back 14, and a handle 26 is mounted on the other end part 20B of the strap 20. Additionally, an intermediate part 20c in the longitudinal direction of the strap 20 is suspended on a hook 34 mounted on a roof head lining 30 through a bracket 36. Consequently, it is possible to change a direction (downward of vehicle) of tensile force F1 working on the end part 20B of the strap 20 to tensile force upward of the vehicle on the end part 20A on the side of the seat back 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seat back moving mechanism for moving a seat back from a position where the seat back is tilted onto a seat cushion to a seating position in a vehicle seat such as an automobile.

Patent Document 1 below discloses a structure in which a strap is connected to a seat back that can be moved forward on a seat cushion. In this structure, the seat back can be caused by pulling the strap from the rear of the vehicle.
JP 2002-127797 A

  However, in the seat back moving mechanism as in Patent Document 1, when the seat back is caused, the strap is pulled from the low position to the upper side obliquely rearward of the vehicle. As a result, the angle formed by the direction in which the seat back is caused (upward of the vehicle) and the pulling direction of the strap approaches a right angle. For this reason, the component of the force in the direction (directly above the vehicle) that causes the seat back acting on the seat back via the strap is reduced, and a large pulling force is required to cause the seat back.

  In view of the above facts, an object of the present invention is to provide a seat back moving mechanism capable of reducing the operating force caused by the seat back.

  According to a first aspect of the present invention, there is provided a seat back moving mechanism according to the first aspect of the present invention, wherein the seat back is movable to a seating position raised around a rotating shaft portion provided at a lower portion and a retracted position tilted on a seat cushion. One end connected to the seat back and a moving means for moving the seat back from the retracted position to the seated position by a pulling force acting on the other end; provided on the vehicle interior wall; And a pulling force direction changing means for changing the direction of the pulling force acting on the end to a pulling force upward of the vehicle at the end on the seat back side.

  When the seat back is moved from the retracted position on the seat cushion to the seating position raised around the rotating shaft provided at the lower portion of the seat back, one end is connected to the seat back and the other end The other end of the moving means for moving the seat back from the retracted position to the seated position is pulled by a pulling force acting on the seat. At this time, the direction of the pulling force acting on the other end of the moving means is changed to the pulling force upward of the vehicle at the end on the seat back side by the pulling force direction changing means provided on the vehicle interior wall. As a result, in a direction (directly above the vehicle) that causes the seat back to act on the seat back via the moving means, as compared with the case where the moving means is pulled diagonally upward and rearward without using the pulling force direction changing means. The force component of becomes larger. For this reason, the seat back can be moved from the retracted position to the seated position around the rotation shaft portion by a small tensile force.

  According to a second aspect of the present invention, in the seat back moving mechanism according to the first aspect, the pulling force direction changing means is provided above the rear surface of the seat back in the retracted position and supports the moving means. It is a moving means support member.

  The moving means is supported by a moving means supporting member provided above the vehicle behind the back of the seat back in the retracted position, and the seat back is moved from the retracted position around the rotation shaft by a small pulling force. It can move to the sitting position.

  The present invention according to claim 1 can reduce the operating force caused by the seat back.

  According to the second aspect of the present invention, the seat back can be raised and the operating force can be reduced with a simple configuration.

  A first embodiment of a seat back moving mechanism according to the present invention will be described with reference to FIGS.

  In the figure, the arrow UP indicates the upward direction of the vehicle, and the arrow FR in the figure indicates the forward direction of the vehicle.

  As shown in FIG. 1, in the present embodiment, in the third row seat 12 in the vehicle 10, the seat back 14 is provided in the lower part in the seated state (the raised state) shown by the two-dot chain line in FIG. 1. The vehicle is rotatable forward (in the direction of arrow A in FIG. 1) and backward (in the direction of arrow B in FIG. 1) around the rotation shaft 16 serving as a rotation shaft portion.

  More specifically, the seat back 14 of the seat 12 is centered on the rotary shaft 16 and the storage position shown by the solid line in FIG. It is possible to move to the seated position shown by the two-dot chain line in FIG.

  At the same time as the seat back 14 moves from the seating position to the retracted position about the rotation shaft 16, the seat cushion 18 of the seat 12 is shown as a solid line in FIG. 1 from the seating position on the vehicle upper side indicated by a two-dot chain line in FIG. It moves to the storage position of the vehicle lower side shown by. Further, at the same time as the seat back 14 moves from the retracted position to the seated position about the rotation shaft 16, the seat cushion 18 of the seat 12 is moved from the retracted position on the lower side of the vehicle shown in FIG. It moves to the sitting position of the vehicle upper side shown by.

  As shown in FIG. 2, the seat back 14 and the seat cushion 18 of the seat 12 are divided into two in the vehicle width direction, for example, at a ratio of 2 to 3 from the right side of the vehicle. One end 20A of a belt-like strap 20 as a moving means is connected.

  One end 20A of the strap 20 is the front portion of the back surface 14A of the seat back 14 that is tilted onto the seat cushion 18 (in the retracted position), that is, the upper portion of the back surface 14A of the seat back 14 in the seated state. It is connected to a mounting portion 24 provided in the vicinity of the headrest 22.

  Further, a winding device 25 having the same structure as a known seat belt retractor is accommodated in the attachment portion 24 of the seat back 14, and the strap 20 is wound around the winding device 25. . Further, a handle (gripping part) 26 is provided at the other end 20B of the strap 20, and the handle 26 has a rectangular frame shape.

  On the other hand, a hook 34 as a moving means supporting member, which is a pulling force direction changing means, is attached to a vehicle rear end portion 30A in the vicinity of the back door 31 in a roof head lining (ceiling material) 30 as a vehicle interior wall. Yes.

  As shown in FIG. 1, the pulling force direction changing means means a pulling force F1 acting on the other end 20B of the strap 20 in the vehicle downward direction (in the direction of arrow F1 in FIG. 1) on the seat back 14 side. This is a means for changing the pulling force F1 upward of the vehicle (angle θ1 formed with the vertical line S) at the end 20A of the vehicle, and on the vehicle interior wall above the vehicle rather than the back surface 14A of the seat back 14 in the retracted position. It is provided and supports the strap 20 so as to be movable.

  Therefore, the downward pulling force F1 acting on the end 20B of the strap 20 is changed to the pulling force F1 upward (angle θ1 formed with the vertical line S) at the end 20A on the seat back 14 side. Is done. As a result, the force component in the direction (directly above the vehicle) that causes the seat back 14 acting on the seat back 14 via the strap 20 is F1 cos θ1.

  On the other hand, when the strap 20 is pulled diagonally upward and rearward without using the hook 34, the direction of the tension force F2 is such that the angle θ2 formed with the vertical line S is θ2> θ1, and the tension force F2 The force component in the direction (directly above the vehicle) that causes the seat back 14 acting on the seat back 14 via the strap 20 is F2 cos θ2.

  Therefore, if F1 cos θ1 = F2 cos θ2, then F1 <F2 because of the relationship θ2> θ1, and a smaller pulling force F1 (F1 <F) than the force F2 when the strap 20 is pulled obliquely upward and rearward without the hook 34. By F2), the seat back 14 can be rotated about the rotating shaft 16 in the rear of the vehicle (in the direction of arrow B in FIG. 1).

  In the present embodiment, one end 20 </ b> A of the strap 20 is connected to a mounting portion 24 provided in the vicinity of the headrest 22 on the back surface 14 </ b> A of the seat back 14. As a result, the distance L1 between the rotation shaft 16 serving as the rotation center of the seat back 14 of the seat 12 and the attachment portion 24 of the seat back 14 to which the end 20A of the strap 20 is coupled is increased. For this reason, compared with the case where the end portion 20A of the strap 20 is connected in the vicinity of the rotating shaft 16 and the distance L1 is short, a large moment can be generated in the direction in which the seat back 14 is caused (above the vehicle).

  As shown in FIG. 3, the hook 34 is attached to the roof head lining 30 (see FIG. 2) via a bracket 36. A mounting portion 36A of the bracket 36 to the vehicle has a rectangular plate shape, and is fixed to the vehicle by a fastening member (not shown) such as a bolt inserted into the mounting holes 38 formed at the four corners from the vehicle lower side. . In addition, a hook support portion 36B that supports the hook 34 downward from the center of the mounting portion 36A of the bracket 36 is formed to protrude.

  The lower end portion of the hook support portion 36B of the bracket 36 is a bearing portion whose axial direction is the vehicle width direction, and the upper frame portion 34A of the hook 34 is rotatably supported by the hook support portion 36B. Further, a longitudinal intermediate portion 20C of the strap 20 is stretched over the lower frame portion 34B of the hook 34.

  An opening 40 is formed in the longitudinal direction intermediate portion of one frame portion 34C of both the vehicle width direction frame portions 34C and 34D in the hook 34, and the strap 20 is inserted into the frame of the hook 34 through the opening 40. The longitudinal intermediate portion 20C can be passed therethrough. The opening 40 can be opened and closed by a moving frame 34F that is rotatably connected to the lower portion 34E of the frame 34C by a pin 42.

  Accordingly, when the longitudinal intermediate portion 20C of the strap 20 is passed through the opening 40 into the frame of the hook 34, the moving frame 34F is moved to the open position indicated by the two-dot chain line in FIG. By moving the moving frame 34F around the pin 42 to the closed position shown by the solid line in FIG. 3, the strap 20 can be prevented from being detached from the hook 34 during the pulling operation.

  Note that the strap 20 can be passed through the frame of the hook 34 in the longitudinal direction 20C in a state where the strap 20 is pulled out from the winding device 25 of the mounting portion 24 as shown in FIG. Further, as shown by the strap 20 on the right side of the vehicle in FIG. 2, the seat back 14 can be rotated by rotating the handle 26 downward from the state in which the strap 20 is completely pulled out from the winding device 25. 1 is moved from the storage position indicated by the solid line in FIG. 1 to the seating position indicated by the two-dot chain line.

  When the operator removes his / her hand from the handle 26 in the fully pulled out state shown by the strap 20 on the right side of the vehicle in FIG. 2, the strap 20 is taken up by the winding device 25, and the handle 26 is shown in FIG. 2 is held at a position corresponding to a hook 34 indicated by a two-dot chain line.

  Next, the operation of this embodiment will be described.

  In the present embodiment, as shown in FIG. 1, the operator K opens the back door 31 of the vehicle 10 and winds it from the vehicle rear side to the winding device 25 provided on the attachment portion 24 of the seat back 14. The handle 26 attached to the strap 20 is pulled (the state of the strap 20 on the left side of the vehicle in FIG. 2), and the strap 20 is pulled out from the attachment portion 24 of the seat back 14.

  Next, as shown in FIG. 3, the moving frame 34 </ b> F of the hook 34 is moved around the pin 42 to an open position indicated by a two-dot chain line in FIG. 3, and the longitudinal direction of the strap 20 is inserted into the frame of the hook 34 through the opening 40. The direction intermediate part 20C is passed. Thereafter, the moving frame 34F is moved around the pin 42 to the closed position shown by the solid line in FIG. 3 so that the strap 20 does not come off the hook 34 during the pulling operation.

  Next, as shown in FIG. 1, the worker K further pulls the strap 20 completely pulled out from the winding device 25 with the handle 26 downward (in the direction of arrow F <b> 1 in FIG. 1). At this time, by passing the longitudinal intermediate portion 20C of the strap 20 through the hook 34, the tensile force (arrow F1 in FIG. 1) acting on the end 20B of the strap 20 is applied to the end 20A on the seat back 14 side. The tensile force is changed to the upward direction of the vehicle (the angle θ1 formed with the vertical line S). As a result, the force component in the direction (directly above the vehicle) that causes the seat back 14 acting on the seat back 14 via the strap 20 is F1 cos θ1.

  On the other hand, when the strap 20 is pulled diagonally upward and rearward without the hook 34, the direction of the tension (arrow F2 in FIG. 1) is such that the angle θ2 formed with the vertical line S is θ2> θ1, Due to this pulling force F2, the component of the force in the direction that causes the seat back 14 acting on the seat back 14 via the strap 20 (directly above the vehicle) is F2 cos θ2.

  Therefore, if F1 cos θ1 = F2 cos θ2, then F1 <F2 from the relationship of θ2> θ1, and in this embodiment, the tension is smaller than the force F2 when the strap 20 is pulled diagonally upward and rearward without the hook 34. With the force F1 (F1 <F2), the seat back 14 can be rotated rearwardly (in the direction of arrow B in FIG. 1) about the rotation shaft 16. For this reason, it is possible to reduce the operating force that causes the seat back 14 to move from the sitting position to the retracted position.

  The angle θ1 decreases as the hook 34 is moved to the front side of the vehicle, and the operating force can be reduced by moving the seat back 14 from the seating position to the retracted position. Since the position of the hook 34 moves away from the opening of the back door 31 of the vehicle 10, it is difficult to pass the longitudinal intermediate portion 20 </ b> C of the strap 20 through the hook 34.

  Further, in the present embodiment, the distance L1 between the rotation shaft 16 serving as the rotation center of the seat back 14 of the seat 12 and the attachment portion 24 of the seat back 14 to which the end 20A of the strap 20 is connected is long. As a result, a larger moment can be generated by the strap 20 in the attachment portion 24 of the seat back 14 than when the end portion 20A of the strap 20 is connected in the vicinity of the rotating shaft 16 in the seat back 14 and the distance L1 is shortened. For this reason, it is possible to further reduce the operating force that causes the seat back 14 to move from the sitting position to the retracted position.

  In the present embodiment, the seat back 14 is moved from the seating position to the retracted position with a simple configuration in which the longitudinal intermediate portion 20C of the strap 20 is passed through the hook 34 provided at the vehicle rear end 30A of the roof head lining 30. The moving operation force can be reduced.

  In the present embodiment, when the strap 20 is not used, the longitudinal intermediate portion 20C of the strap 20 is removed from the hook 34, and the strap 20 is attached to the winding device 25 provided in the attachment portion 24 of the seat back 14. Since it can be wound up, the strap 20 does not get in the way of loading and unloading luggage into the rear of the passenger compartment. Also, it looks good (appearance quality).

  Next, a second embodiment of the seat back moving mechanism according to the present invention will be described with reference to FIG.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 4, in this embodiment, the hook 34 is attached to the rear header 50 that is disposed between the roof head lining 30 and the back door 31 and constitutes the upper part of the rear wall of the vehicle interior. Is attached via.

  Therefore, also in this embodiment, the same effect as the first embodiment can be obtained. Further, in the present embodiment, compared to the first embodiment, the hook 34 approaches the back door opening, and thus the longitudinal intermediate portion 20C of the strap 20 can be easily passed through the hook 34.

  Next, a third embodiment of the seat back moving mechanism according to the present invention will be described with reference to FIGS.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, in this embodiment, a hook 52 that is a pulling force direction changing means is attached to a rear portion 54 </ b> A of a roof side garnish 54 that constitutes an upper portion of a vehicle compartment side wall as a vehicle interior wall.

  As shown in FIG. 6, the hook 52 is attached to the roof side garnish 54 (see FIG. 5) via a bracket 56. A mounting portion 56A of the bracket 56 to the vehicle has a rectangular plate shape, and is fastened by fastening members (not shown) such as bolts inserted into the mounting holes 58 formed at the four corners from the vehicle width direction inner side (vehicle interior side). It is fixed to the vehicle. A pair of front and rear hook support portions 56B for supporting the hook 52 toward the vehicle width inward are formed from the substantially central portion of the mounting portion 56A of the bracket 56.

  The tip portions of these hook support portions 56B serve as bearing portions, and the upper end portion 52A of the hook 52 is rotatably supported by the shaft 60 on the hook support portion 56B. The lower part of the hook 52 is a hook part 52B on a horizontal plate, and a vertical wall part 52C is formed at the tip of the hook part 52B upward. For this reason, the longitudinal intermediate portion 20C of the strap 20 spanned over the hook 52 is prevented from being detached from the hook portion 52B by the vertical wall portion 52C during the pulling operation.

  Therefore, also in this embodiment, the same effect as the first embodiment can be obtained. Compared with the first embodiment, in the present embodiment, the hook 52 is disposed at a position closer to the side wall of the passenger compartment. Therefore, even when the longitudinal intermediate portion 20C of the strap 20 is hung on the hook 52, the vehicle The strap 20 is unlikely to obstruct the loading / unloading of luggage into the rear of the room.

  Next, a fourth embodiment of the seat back moving mechanism according to the present invention will be described with reference to FIG.

  In addition, about the same member as 3rd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 7, in the present embodiment, a hook 52 is disposed via a bracket 56 on a D-pillar garnish 64 that is disposed below the rear portion 54 </ b> A of the roof side garnish 54 and constitutes a vehicle interior side wall. Installed.

  Therefore, also in this embodiment, the same effect as the third embodiment can be obtained. In addition, compared to the third embodiment, in the present embodiment, the hook 52 is disposed on the vehicle lower side, so that the longitudinal intermediate portion 20C of the strap 20 can be easily hung on the hook 52.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, the mounting position of the hooks 34 and 52 as the moving means support members, which are the pulling force direction changing means in each of the above embodiments, on the vehicle interior wall is not limited to the mounting position of each of the above embodiments, but is in the storage position. Other parts such as a C pillar garnish, a deck side trim, a back door trim, and a back door panel may be used as long as they are located above the seat cushion 18 of the seat 12 and behind the headrest 22.

  In each of the above embodiments, the belt-like strap 20 is used as the moving means, but the moving means may be other moving means such as a string-like member such as a wire in addition to the belt-like body such as the strap 20.

  Further, in each of the above embodiments, the end 20A of the strap 20 as the moving means is connected to the mounting portion 24 provided in the vicinity of the headrest 22 on the back surface 14A of the seat back 14, but the end 20A of the strap 20 is connected to the headrest 22. You may connect to.

  In each of the above embodiments, the hooks 34 and 52 are used as moving means supporting members that are tensile force direction changing means. However, the moving means supporting members that are tensile force direction changing means act on the end portion 20B of the strap 20. As long as it is a means for changing the direction of the pulling force F1 to the pulling force toward the upper side of the vehicle at the end 20A on the seat back 14 side, a pair of straps 20 that are formed on the vehicle interior wall such as the roof head lining 30 can pass. Other configurations such as through-holes may be used.

  Further, in each of the above embodiments, the winding device 25 is disposed on the attachment portion 24 of the seat back 14, but the winding device 25 is not provided on the attachment portion 24 of the seat back 14, and the end 20A of the strap 20 is attached to the seat back. It is good also as a structure connected with 14 directly.

  In each of the above embodiments, the seat back moving mechanism of the present invention is applied to the third row seat 12 in the vehicle 10, but the seat back moving mechanism of the present invention is also applied to other vehicle seats such as the second row seat. Is possible.

  In each of the above embodiments, the seat back moving mechanism of the present invention is applied to the seat 12 in which the seat back 14 and the seat cushion 18 are divided into two at a ratio of 2 to 3 from the right side of the vehicle in the vehicle width direction. The seat back moving mechanism of the present invention can also be applied to sheets having other division ratios.

  In each of the above embodiments, the seat back moving mechanism of the present invention is a seat arrangement in which the seat back 14 and the seat cushion 18 are moved to the seating position indicated by the two-dot chain line and the storage position indicated by the solid line in FIG. Although applied to the seat 12, the seat back moving mechanism of the present invention can also be applied to a seat having a seat arrangement different from the above embodiments in which the seat back and the seat cushion move to other storage positions.

It is a schematic side view which shows the vehicle seat back moving mechanism which concerns on 1st Embodiment of this invention. It is a schematic perspective view which shows the vehicle seat back moving mechanism which concerns on 1st Embodiment of this invention. It is the perspective view seen from the vehicle diagonal back which shows the principal part of the vehicle seat back moving mechanism which concerns on 1st Embodiment of this invention. It is a schematic perspective view which shows the vehicle seat back moving mechanism which concerns on 2nd Embodiment of this invention. It is a schematic perspective view which shows the vehicle seat back moving mechanism which concerns on 3rd Embodiment of this invention. It is the perspective view seen from the vehicle diagonal back which shows the principal part of the vehicle seat back moving mechanism which concerns on 3rd Embodiment of this invention. It is a schematic perspective view which shows the vehicle seat back moving mechanism which concerns on 4th Embodiment of this invention.

Explanation of symbols

12 Seat 14 Seat back 16 Rotating shaft of seat back 18 Seat cushion 20 Strap (moving means)
22 Headrest 24 Strap attachment part in seat back 25 Winding device 26 Handle 30 Roof head lining (vehicle interior wall)
31 Back door 34 Hook (Tensioning force direction changing means, moving means supporting member)
36 Bracket 50 Rear header (vehicle interior wall)
52 Hook (Tensioning force direction changing means, moving means supporting member)
54 Roof side garnish (vehicle interior wall)
56 Bracket 64 D pillar garnish (vehicle interior wall)

Claims (2)

A seat back that is movable to a seating position raised around a rotating shaft portion provided at a lower portion and a storage position that is tilted on the seat cushion;
One end connected to the seat back, and a moving means for moving the seat back from the retracted position to the seated position by a pulling force acting on the other end;
A pulling force direction changing means that is provided on a vehicle interior wall and changes the direction of the pulling force acting on the other end of the moving means to a pulling force upward on the vehicle at the end on the seat back side;
A seat back moving mechanism comprising:   2. The seat back movement according to claim 1, wherein the pulling force direction changing means is a moving means supporting member that is provided above the back of the seat back in the retracted position and supports the moving means. mechanism.

Images