JP6777455B2 - Vehicle seat drive - Google Patents

Description

The present invention relates to a vehicle seat drive device.

In vehicle seats, cables (cables) are used as means to transmit operating force, such as a seat back operation mechanism that sets the angle position of the seat back with respect to the seat cushion, and a seat slide mechanism that changes the front-rear position of the seat cushion and seat back. Wire) is often used. In a vehicle seat of a type that can set a walk-in state that makes it easier to get in and out of the rear seat, as in Patent Document 1, the reclining lock is unlocked in the seat back operation mechanism and the seat slide mechanism is unlocked at the same time. However, a cable is also used as a means for performing this interlocking.

Japanese Unexamined Patent Publication No. 2009-255811

In recent years, as the operation of the vehicle seat becomes complicated, the number of cables used for the driving device of the vehicle seat tends to increase, and the arrangement of the cables tends to be easily restricted by other members. Therefore, it is required to arrange a plurality of cables in a space-efficient manner. In order to satisfy this requirement, it is an object of the present invention to provide a vehicle seat drive device capable of arranging a plurality of cables in a space-efficient manner with a simple configuration.

In the present invention, the seat back is operated with respect to the seat cushion in a lock range in which the reclining mechanism operates and the angle can be set, and an unlock range in which the non-operating state of the reclining mechanism is maintained in front of the lock range. It is equipped with a back operation mechanism, a slide lock mechanism that regulates the front-rear movement of the seat cushion and the seat back, and a slide lock mechanism that operates in a slide lock release state that allows the seat cushion and the seat back to move in the front-rear direction. The target is a vehicle seat drive device that can be put into a walk-in state in which the back is in the unlock range and the slide lock is released. A plurality of operating members that are movably supported by a support member fixed to the seat cushion and operate at least one of the seat back operating mechanism and the slide lock mechanism, or interlock with at least one of the seat back operating mechanism and the slide lock mechanism. And a plurality of cables interlocking with the movement of a plurality of operating members, and a cable support member provided on the support member and having a plurality of cable support portions for supporting the plurality of cables. The cable support member has a reclining mechanism. It is characterized by supporting a release handle for operation.

The plurality of operating members include cable connection portions that are different in height direction with respect to the support member, the plurality of cable support portions in the cable support member are different in height direction, and the plurality of cables intersect each other in the height direction. It is preferable that the cable is arranged between the cable connection portion and the cable support portion so as not to be.

Cables lined up in the height direction have a form in which the distance between the cables in the height direction is widened from the cable connection to the cable support, and the distance between the cables in the height is narrowed from the cable connection to the cable support. It may be supported in either a form in which the cable is connected or a form in which the distance between the cable connection portion and the cable support portion in the height direction is constant.

According to the above invention, by supporting a plurality of cables by a common cable support member, it is possible to obtain a vehicle seat drive device capable of arranging a plurality of cables in a space-efficient manner with a simple configuration. In addition, by arranging a plurality of cables between the operating member (cable connection part) and the cable support member (cable support part) so as not to intersect each other in the height direction from the support member, the degree of freedom and space for arrangement The efficiency can be further improved.

It is a side view of a vehicle seat. It is an exploded perspective view of the seat reclining device provided on one side of a vehicle seat. It is a perspective view of the seat reclining device. It is a perspective view of the seat reclining device seen from the angle different from FIG. 3 by omitting some components. It is a side view of the seat reclining device in a state where the seat back is in the reclining range, as seen from the outside of the seat. It is a side view of the seat reclining device in a state where the seat back is in the reclining range, as seen from the inside of the seat. It is a side view of the seat reclining device in the state where the seat back is in the intermediate stop position, as seen from the outside of the seat. It is a side view of the seat reclining device in the state where the seat back is in the intermediate stop position, as seen from the inside of the seat. It is a side view of the seat reclining device in the state where the seat back is in the falldown position, as seen from the outside of the seat. It is a side view of the seat reclining device in the state where the seat back is in the falldown position, as seen from the inside of the seat. It is a side view of the seat reclining device in a state where the seat back is tilted from the falldown position to just before the reclining range, as viewed from the outside of the seat. It is a side view of the seat reclining device in a state where the seat back is tilted from the falldown position to just before the reclining range, as viewed from the inside of the seat. It is sectional drawing which follows the XIII-XIII line of FIG. It is a top view of the open plate seen from the inside of a sheet. It is a top view which looked at the 1st lever from the inside of a seat. It is a top view which looked at the 2nd lever from the inside of a seat. It is a top view of the cancel lever seen from the inside of the seat. It is a perspective view of the 1st bracket. It is a top view which looked at the support guide plate from the inside of a sheet. It is a top view which looked at the handle fastening member from the inside of a seat. It is a perspective view of the 2nd bracket. It is a figure which shows typically the arrangement in the height direction of two cables provided in a seat reclining apparatus. It is a figure which shows typically the different forms of arrangement of two cables in a height direction. It is a figure which shows typically the different forms of arrangement of two cables in a height direction.

The vehicle seat 1 shown in FIG. 1 is supported so as to be movable in the front-rear direction of the vehicle via the seat truck 2. The seat track 2 has a lower rail 2a fixed to the floor surface and an upper rail 2b that can slide in the front-rear direction with respect to the lower rail 2a. The upper rail 2b can be brought into a slide lock state in which the slide with respect to the lower rail 2a is restricted and a slide allowable state in which the upper rail 2a can be slid with respect to the lower rail 2a by the slide lock mechanism 3 conceptually shown in FIG. A well-known slide lock mechanism 3 can be applied, and detailed description thereof will be omitted. The vehicle seat 1 is moved and urged forward by a slide spring (not shown).

The vehicle seat 1 has a seat cushion 4 which is a seat surface portion and a seat back 5 which is a backrest portion. The seat cushion frame 4a (partially shown in FIG. 1) constituting the seat cushion 4 is fixedly supported on the upper rail 2b. A seat back 5 is supported near the rear end of the seat cushion 4 so as to be tiltable in the front-rear direction via a seat reclining device 10 described later. FIG. 1 schematically shows the rotation center 5x, which is the center of tilt of the seat back 5. In the reclining range (lock range) R shown in FIG. 1, the seat reclining device 10 operates the reclining lock mechanisms (reclining mechanism) 14 and 71, which will be described later, to hold the seat back 4 at an arbitrary angle position (reclining lock). It is possible. The position where the reclining angle of the seat back 5 is the smallest (standing up) in the reclining range R is the first stage lock position 5A. The seat reclining device 10 urges the seat back 5 in the forward tilting direction (clockwise in FIG. 1), and when the reclining lock is released, the seat back 5 falls forward from the first stage lock position 5A. The tilt range of the seat back 5 in front of the first-stage lock position 5A is the unlock range U in which the non-operating states of the reclining lock mechanisms 14 and 71 are maintained (reclining lock is not performed).

As shown in FIG. 1, on the side surface of the seat cushion 4, the rotational operable release handle 6 is provided around a rotation center 6x positioned below the rotation center 5x of the seat back 5. The seat back 5 is provided with a walk-in operation lever 7. Further, on the side surface of the seat cushion 4, a falldown operation lever 8 is provided at a position different from that of the release handle 6. By operating the release handle 6 and the walk-in operation lever 7, the reclining lock can be released and the seat back 5 can be tilted forward to the intermediate stop position 5B of the unlock range U. Further, by operating the falldown operation lever 8, the seat back 5 can be tilted forward to the falldown position 5C where the back surface becomes substantially horizontal. The operation of the seat back 5 to each of these positions will be described in detail later.

The seat reclining device 10 will be described with reference to FIGS. 2 and 2. One seat reclining device is provided on each side of the vehicle seat 1 in the width direction, and the seat reclining device 10 shown is on one side of the seat reclining device 10 (on the right side in the vehicle seat 1 of FIG. 1 in the traveling direction). It is a thing. In the following description of the seat reclining device 10, "inside the seat" means a side close to the center in the width direction of the vehicle seat 1, and "outside the seat" means a side far from the center in the width direction of the vehicle seat 1 (FIG. It means the direction of the right side surface of the vehicle seat 1 appearing in 1). 5, FIG. 7, FIGS. 9 and 11 show the seat reclining device 10 viewed from the outside of the seat, and FIGS. 6, 8, 10 and 12 show the seat reclining device 10 viewed from the inside of the seat. Each member (open plate 20, first lever 21, second lever 30, cancel lever 31, support guide plate 41, handle fastening member 42) shown in FIGS. 14 to 17, 19 and 20 is viewed from the inside of the seat in a plan view. The front and back sides of the seat are reversed from those of FIGS. 5, 7, 9, and 11 viewed from the outside of the seat.

As shown in FIG. 2, the seat reclining device 10 has a lower bracket (support member) 11 fixedly supported on the seat cushion 4 side and an upper bracket 12 fixedly supported on the seat back 5 side. The lower bracket 11 is fixed to the vicinity of the rear end of the seat cushion frame 4a (FIG. 1) via the support plate 13. A reclining lock mechanism 14 is provided between the lower bracket 11 and the upper bracket 12. The reclining lock mechanism 14 is a round type reclining lock mechanism, and since its configuration is well known, it will be briefly described. The base plate 14a and the ratchet plate 14b, each of which has a disk shape, are combined so as to be relatively rotatable, the base plate 14a is fixed to the fastening portion 11a located near the upper end of the lower bracket 11 by welding, and the ratchet plate 14b is the upper bracket 12 It is fixed by welding to the fastening portion 12a located near the lower end of the. The center of relative rotation of the base plate 14a and the ratchet plate 14b is the rotation center 5x of the seat back 5 shown in FIG. A plurality of lock members (not shown) that can move in the radial direction centered on the rotation center 5x and a cam member (not shown) that rotates around the rotation center 5x are arranged between the base plate 14a and the ratchet plate 14b. Will be done. The movement of each lock member in the rotation direction is restricted with respect to the base plate 14a, and the cam member rotates integrally with the hinge pin 15 inserted in the center of the base plate 14a and the ratchet plate 14b (above the rotation center 5x). The radial position of each lock member changes due to the change in the position of the cam member in the rotational direction. When each lock member moves in the outer diameter direction, the outer teeth formed on each lock member mesh with the inner teeth formed on the ratchet plate 14b, and the relative rotation of the base plate 14a and the ratchet plate 14b is restricted. The cam member is urged in the locking direction by engaging the outer teeth of the lock member with the inner teeth of the ratchet plate 14b by a lock urging spring (not shown) built in the reclining lock mechanism 14. Therefore, the reclining lock mechanism 14 maintains a locked state that regulates the tilt of the upper bracket 12 with respect to the lower bracket 11 when not operated from the outside.

The upper bracket 12 is urged in the forward tilting direction (intermediate stop position 5B and falldown position 5C) by the forward tilting urging spring 16 shown in FIG. The forward tilting urging spring 16 is a spiral spring having one end engaged with the upper bracket 12 and the other end engaged with the support bracket 13.

An open plate (moving member) 20 that rotates integrally with the hinge pin 15 is provided on the outside of the seat of the lower bracket 11. As shown in FIGS. 2 and 14, the open plate 20 has a non-circular hole 20a near the center in the longitudinal direction, and has a cable connection hole (cable connection portion) 20b and an arc hole 20c near one end in the longitudinal direction. A cable connection hole (cable connection portion) 20d is provided near the other end in the longitudinal direction. By inserting the non-circular cross-sectional portion of the hinge pin 15 into the non-circular hole 20a, the hinge pin 15 and the open plate 20 are integrally rotated and connected. The arc hole 20c is an elongated hole extending in the circumferential direction about the central axis (rotation center 5x) of the hinge pin 15 inserted into the non-circular hole 20a. The urging force of the above-mentioned lock urging spring built in the reclining lock mechanism 14 acts on the open plate 20 via the hinge pin 15, and this urging force is clockwise in FIGS. 5, 7, 9, and 11. , The open plate 20 is urged counterclockwise in FIG. 14 to hold the open plate 20 in the locked position (FIGS. 5, 9 and 11). The open plate 20 can rotate from the locked position to the unlocked position (FIG. 7) against the urging force.

On the outside of the seat of the lower bracket 11, the first lever (moving member) 21 is rotatably supported at a position below the open plate 20 via a shaft member 22. As shown in FIGS. 2 and 15, the first lever 21 has a shaft hole 21a near one end, and the pin support holes are arranged in the radial direction around the shaft hole 21a in the order of proximity to the shaft hole 21a. It has 21b, a pin support hole 21c, and a cable connection portion 21d. Further, a spring hook hole 21e is formed in the first lever 21.

The shaft member 22 (FIG. 2) is inserted through the shaft hole 21a of the first lever 21. The shaft member 22 is inserted into the shaft support hole 11b (FIG. 2) of the lower bracket 11 and is fixedly supported. The central axis of the shaft member 22 is substantially parallel to the rotation center 5x of the seat back 5, and the first lever 21 is rotatably supported around the shaft member 22. As shown in FIG. 15, the portion of the shaft member 22 inserted into the shaft hole 21a is a circular cross-sectional portion 22a, whereas the shaft hole 21a is slightly larger than the circular cross-sectional portion 22a of the shaft member 22. It has a horizontally long elongated hole shape. The longitudinal direction of the shaft hole 21a is oriented in the direction in which the pin support hole 21b, the pin support hole 21c, and the cable connecting portion 21d are aligned. More specifically, the pin support hole 21c is located on the extension of the shaft hole 21a in the longitudinal direction, and absorbs (adjusts) the error of the support position of the first lever 21 with respect to the lower bracket 11 along the longitudinal direction. be able to. However, the clearance between the shaft hole 21a and the shaft member 22 is very small so as not to cause rattling or abnormal noise of the first lever 21.

A linking pin 23 that protrudes toward the outside of the seat is inserted and supported in the pin support hole 21b of the first lever 21, and a stopper pin 24 that protrudes toward the inside of the seat is inserted and supported in the pin support hole 21c. The linking pin 23 is a protrusion having a cylindrical outer peripheral surface. The stopper pin 24 rotatably supports a cylindrical outer cylinder 24b having a diameter larger than that of the linking pin 23 on the outer peripheral surface of the shaft portion 24a that is inserted and supported in the pin support hole 21c, and the lower bracket 11 It protrudes inside the seat of the lower bracket 11 through the arc hole 11c formed in (FIG. 6, FIG. 8, FIG. 10, FIG. 12). The outer peripheral surfaces of the linking pin 23 and the stopper pin 24 assembled to the first lever 21 are virtually shown by a alternate long and short dash line in FIG. The arc hole 11c is an elongated hole extending in the circumferential direction centered on the circular cross-sectional portion 22a (FIG. 15) of the shaft member 22 inserted and supported in the shaft support hole 11b.

A control protrusion 25 is formed near the lower end of the upper bracket 12. As shown in FIGS. 6, 8, 10 and 12, the control protrusion 25 is located at a position eccentric from the rotation center 5x of the seat back 5, and the first press that faces one of the rotation directions centered on the rotation center 5x. It has a surface 25a, a second pressing surface 25b facing the other in the rotation direction, and a peripheral curved surface 25c connecting the first pressing surface 25a and the second pressing surface 25b. The first pressing surface 25a is a plane extending in the radial direction about the center of rotation 5x. The second pressing surface 25b is a flat surface having a constant inclination with respect to the first pressing surface 25a, and the second pressing surface 25b becomes the first as it advances toward the tip end side of the control protrusion 25 away from the rotation center 5x of the seat back 5. The inclination direction is such that the distance from the pressing surface 25a is reduced. The peripheral curved surface 25c is a curved surface extending in the circumferential direction centered on the rotation center 5x.

The first lever 21 swings (rotates) around the shaft member 22 so that the stopper pin 24 moves on the movement locus of the control protrusion 25 of the upper bracket 12 (the rotation locus of the control protrusion 25 centered on the rotation center 5x). It moves to the forward tilting restriction position (FIG. 7) for advancing and the restriction release position (FIGS. 5, 9, and 11) in which the stopper pin 24 retracts downward from the movement locus of the control protrusion 25. The first lever 21 has a tension spring 26 (FIG. 15) having one end engaged with the spring hooking hole 21e and the other end engaging with the spring hooking piece 27 (FIGS. 2 and 3) fixed on the lower bracket 11. The spring is urged in the direction of the forward tilt limiting position (clockwise in FIGS. 5, 7, 9 and 11 and counterclockwise in FIG. 15). As shown in FIG. 8, the stopper pin 24 (outer cylinder 24b) abuts on the upper end of the arc hole 11c to determine the moving end (that is, the forward tilt limiting position) of the tension spring 26 in the urging direction.

Further, the lower bracket 11 is rotatably supported by the second lever (moving member) 30 and the cancel lever 31 via the shaft member 32 at a position below the first lever 21. The second lever 30 is located outside the seat with respect to the lower bracket 11, and the cancel lever 31 is located inside the seat with respect to the lower bracket 11.

As shown in FIGS. 2 and 16, the second lever 30 has a hook portion 30c, a cable connecting portion 30d, and a spring hook portion 30e in different directions from the central portion 30b where the oval-shaped non-circular hole 30a is formed. It is protruding. The hook portion 30c is a cantilever-shaped protrusion whose base end is connected to the central portion 30b, and protrudes from the base end in the radial direction centered on the non-circular hole 30a, and is substantially centered on the shaft member 32 in the middle. It has a shape that bends in the direction of rotation. A recess 30f that opens in the direction of rotation of the second lever 30 is formed between the hook portion 30c and the central portion 30a, and the hook portion 30c is formed with a straight (planar) shape that forms an inner edge portion of the recess 30f. A tangent portion of 30 g is formed. The spring hooking portion 30e is bent substantially perpendicular to the central portion 30b and projects toward the inside of the seat (FIGS. 2 and 3).

As shown in FIGS. 2 and 17, the cancel lever 31 has a central portion 31b in which an oval-shaped non-circular hole 31a is formed, and a pressed protrusion 31c protruding radially from the central portion 31b. The pressed protrusion 31c has a tapered shape having a pair of side surfaces 31d and 31e that gradually narrow the distance between the pressed protrusions 31c as the distance from the central portion 31b moves toward the tip side, and the tip of the pressed protrusion 31c has a smooth tip curved surface. It is 31f.

The shaft member 32 has two non-circular cross-sections coaxially sandwiching the circular cross-section, and one non-circular cross-section of the shaft member 32 is inserted into the non-circular hole 30a of the second lever 30. .. The circular cross-sectional portion of the shaft member 32 is rotatably inserted into the substantially circular shaft hole 11d (FIG. 2) formed in the lower bracket 11. The other non-circular cross section of the shaft member 32 is inserted into the non-circular hole 31a of the cancel lever 31. The second lever 30 and the cancel lever 31, each supported by the non-circular cross section of the shaft member 32, can rotate integrally with the lower bracket 11 around the shaft member 32. The lower bracket 11 is formed with a cut-up piece 11e (FIGS. 3 and 4) protruding toward the outside of the seat at a position along the spring hook portion 30e of the second lever 30, and the base of the cut-up piece 11e escapes. It is connected to the inner edge of the hole 11f. The spring hooking portion 30e is inserted into the relief hole 11f, and when the second lever 30 rotates, the spring hooking portion 30e moves in the relief hole 11f.

The second lever 30 advances and retreats the hook portion 30c on the movement locus (rotational locus around the shaft member 22) of the linking pin 23 provided on the first lever 21 by swinging (rotating) around the shaft member 32. Let me. At the holding position of the second lever 30 (FIGS. 5 and 9), the hook portion 30c advances on the movement locus of the linking pin 23 (the linking pin 23 enters the recess 30f). In a state where the first lever 21 is in the restriction release position and the second lever 30 is in the holding position, the linking pin 23 comes into contact with the contact edge portion 30 g of the hook portion 30c, and the first lever 23 is brought into contact with the forward tilt restriction position. The second lever 30 regulates the rotation of the lever 21. At the holding / releasing position of the second lever 30 (FIG. 7), the hook portion 30c retracts from the movement locus of the linking pin 23 (the linking pin 23 separates from the recess 30f), and the first lever moves to the forward tilt limiting position. Allows 21 rotations. The second lever 30 can also rotate to an over-holding position (FIG. 11) that is advanced in the direction opposite to the holding / releasing position with respect to the holding position. At the over-holding position of the second lever 30, the hook portion 30c advances on the movement locus of the linking pin 23 as in the holding position, and the contact edge portion 30g and the linking pin 23 come into contact with each other to move forward to the restricted position. The rotation of the first lever 21 is regulated. That is, the second lever 30 can rotate to the intermediate holding position (FIGS. 5 and 9), the holding release position (FIG. 7) and the over holding position (FIG. 11) in the opposite directions thereof, and the holding position. At the over-holding position, the first lever 21 is held at the restriction release position by the contact between the hook portion 30c and the linking pin 23, and at the hold release position, the rotation restriction to the first lever 21 is released. As shown in FIGS. 5 and 7, the contact edge portion 30g of the second lever 30 is a surface that faces in the radial direction with the shaft member 22 as the center when the linking pin 23 comes into contact with the contact pin 23. Therefore, the contact edge portion 30g is in a positional relationship substantially facing the moving locus of the linking pin 23, and efficiency is achieved without generating an unnecessary component force in the rotational direction from the first lever 21 to the second lever 30. The rotation of the first lever 21 can be regulated accurately and reliably.

The cancel lever 31 swings (rotates) around the shaft member 32 to form a pressed protrusion 31c on the movement locus of the control protrusion 25 of the upper bracket 12 (rotation locus of the control protrusion 25 centered on the rotation center 5x). Move forward and backward. When the second lever 30 is in the holding position (FIGS. 5 and 9), the cancel lever 31 is in the neutral position (FIGS. 6 and 10) in which the pressed protrusion 31c advances on the movement locus of the control protrusion 25. When the second lever 30 is in the holding release position (FIG. 7), the cancel lever 31 is in the first idle swing position (FIG. 8) in which the pressed projection 31c retracts from the movement locus of the control projection 25. Further, when the second lever 30 is in the overholding position (FIG. 11), the cancel lever 31 is in the second missed swing position (FIG. 12) in which the pressed protrusion 31c retracts from the movement locus of the control protrusion 25. That is, the cancel lever 31 can rotate to an intermediate neutral position (FIGS. 6 and 10) and a first missed swing position (FIG. 8) and a second missed swing position (FIG. 12) in the opposite directions thereof. The position is controlled according to the movement of the control protrusion 25 accompanying the rotation of the upper bracket 12.

The stopper pin 24 on the first lever 21 and the pressed protrusion 31c of the cancel lever 31 are arranged at different positions in the rotation direction of the upper bracket 12, and the control protrusion 25 differs depending on the operation of the upper bracket 12. It comes into contact with the stopper pin 24 and the cancel lever 31 at the timing. As shown in FIGS. 6, 8 and 10, when the upper bracket 12 (seat back 5) tilts forward, the control protrusion 25 comes into contact with the cancel lever 31 and the stopper pin 24 in this order.

The second lever 30 and the cancel lever 31 are urged to the holding position and the neutral position by the torsion spring 33, respectively. The torsion spring 33 has a coil portion that surrounds the circular cross-sectional portion of the shaft member 32 and a pair of spring end portions that extend in the outer diameter direction from the coil portion, and the pair of spring end portions is the second lever 30. The spring hooking portion 30e and the cut-up piece 11e of the lower bracket 11 are sandwiched (FIGS. 3 and 4). When the second lever 30 rotates in the forward and reverse directions from the holding position, one spring end is pressed by the spring hook 30e, while the other spring end engages with the cut-up piece 11e to move. Since it is regulated, the distance between the pair of spring ends is widened and the torsion spring 33 bends. The force for eliminating this bending becomes an urging force for returning the second lever 30 to the holding position and returning the cancel lever 31 to the neutral position. As described above, when the second lever 30 is in the holding position and the over-holding position, it is difficult for the component force in the rotational direction to be transmitted from the linking pin 23 to the contact edge portion 30g (the contact edge portion 30g is the linking pin). Since the relationship is (opposite to the moving direction of 23), the load required for the torsion spring 33 can be suppressed.

A first bracket (cable support member) 40 is fixed near the lower end of the outer surface of the lower bracket 11. As shown in FIG. 18, the first bracket 40 includes a flat plate-shaped support plate portion 40a and two leg portions 40b and 40c extending from the support plate portion 40a toward the lower bracket 11 side (inside the seat). It has flat plate-shaped pedestals 40d and 40e extending substantially parallel to the support plate 40a from the ends of the legs 40b and 40c. A shaft support hole 40f and a fastening hole 40g are formed in the support plate portion 40a. A flat plate-shaped side plate 40h substantially perpendicular to the support plate portion 40a and the pedestal portion 40d protrudes from the leg portion 40b, and the side plate 40h is positioned differently in the height direction (seat width direction) of the first bracket 40. A cable support groove (cable support portion) 40i and a cable support groove (cable support portion) 40j are formed. The cable support groove 40i and the cable support groove 40j are grooves that are substantially parallel to each other, and are open on one side of the side plate 40h. With the first bracket 40 attached to the lower bracket 11, the openings of the cable support groove 40i and the cable support groove 40j generally face the rear of the vehicle.

A support guide plate 41 is fixed on the support plate portion 40a of the first bracket 40. As shown in FIGS. 2 and 19, most of the support guide plate 41 is composed of the flat plate portion 41a, and the spring hook piece 41b projects from the edge of the flat plate portion 41a toward the outside of the seat. The flat plate portion 41a has a larger area than the support plate portion 40a of the first bracket 40, and a shaft support hole 41c and a fastening hole 41d are formed in a portion of the flat plate portion 41a that overlaps with the support plate portion 40a, and overlaps with the support plate portion 40a. An arc hole 41e is formed in the portion that does not form. The arc hole 41e is an elongated hole extending in the circumferential direction centered on the shaft support hole 41c, and both end portions 41e-1 and 41e-2 in the longitudinal direction are straight lines extending in the radial direction centered on the shaft support hole 41c. It has a (flat) shape.

The handle fastening member 42 is supported on the flat plate portion 41a of the support guide plate 41. As shown in FIGS. 2 and 20, the handle fastening member 42 has two flat plates 42a and 42b that are substantially flush with each other, and two flat plates that are offset to the outside of the sheet with respect to the flat plates 42a and 42b. It has portions 42c and 42d, and the flat plate portion 42a and the flat plate portion 42b have a substantially diagonal positional relationship, and the flat plate portion 42c and the flat plate portion 42d have a substantially diagonal positional relationship. A shaft hole 42e is formed in the flat plate portion 42a, and a guide pin mounting hole 42f is formed in the flat plate portion 42b. Further, two handle fastening holes 42g are formed in the flat plate portion 42c, and a rod mounting hole 42h is formed in the flat plate portion 42d.

As shown in FIG. 13, the first bracket 40, the support guide plate 41, and the handle fastening member 42 are aligned and overlapped so that the shaft support hole 40f, the shaft support hole 41c, and the shaft hole 42e communicate with each other. Further, the support guide plate 41 and the handle fastening member 42 have a positional relationship in which the arc hole 41e and the guide pin mounting hole 42f overlap each other (FIG. 13), and the first bracket 40 and the support guide plate 41 overlap the fastening hole 40g and the fastening hole 41d. The positional relationship is set (Fig. 9). In the state of being aligned and stacked in this way, the support plate portion 40a of the first bracket 40 comes into contact with the flat plate portion 41a of the support guide plate 41 from the inside of the sheet, and the flat plate portion 42a and the flat plate portion of the handle fastening member 42. 42b comes into contact with the flat plate portion 41a of the support guide plate 41 from the outside of the sheet.

As shown in FIG. 13, the shaft member 43 is inserted into the shaft support hole 40f, the shaft support hole 41c, and the shaft hole 42e. The shaft member 43 has a configuration in which a large diameter portion 43a, an intermediate diameter portion 43b, and a small diameter portion 43c, each of which has a cylindrical outer peripheral surface, are arranged coaxially, with the small diameter portion 43c at the head and from the outside of the seat to the inside of the seat. (That is, from the shaft hole 42e side toward the shaft support hole 40f side). Further insertion of the shaft member 43 is restricted by the step portion located at the boundary between the large diameter portion 43a and the intermediate diameter portion 43b coming into contact with the flat plate portion 42a of the handle fastening member 42. In this insertion restricted state, the intermediate diameter portion 43b is located in the shaft hole 42e, the small diameter portion 43c is located in the shaft support hole 40f and the shaft support hole 41c, and the tip of the small diameter portion 43c is the shaft support hole 40f (support plate). It protrudes from the portion 40a) to the inside of the seat. By crimping the protruding portion of the small diameter portion 43c to form the caulking portion 43d, the support plate portion 40a, the flat plate portion 41a, and the flat plate portion 42a are sandwiched between the large diameter portion 43a and the caulking portion 43d. The shaft support hole 40f and the shaft support hole 41c are circular holes having substantially the same diameter, and the small diameter portion 43c is inserted without rattling. The shaft hole 42e is a circular hole having a diameter larger than that of the shaft support hole 40f and the arc hole 41e, and the inner peripheral surface of the shaft hole 42e rotatably contacts the outer peripheral surface of the intermediate diameter portion 43b.

As shown in FIG. 13, the guide pin 44 is inserted into the arc hole 41e and the guide pin mounting hole 42f. The guide pin 44 has a configuration in which the head portion 44a, each having a cylindrical outer peripheral surface, the intermediate diameter portion 44b, and the small diameter portion 44c are arranged coaxially, with the small diameter portion 44c at the head and from the inside of the seat to the outside of the seat. Insert (that is, from the arc hole 41e side toward the guide pin mounting hole 42f side). Further insertion of the guide pin 44 is restricted by the step portion located at the boundary between the head portion 44a and the intermediate diameter portion 44b coming into contact with the flat plate portion 41a of the support guide plate 41. In this insertion restricted state, the intermediate diameter portion 44b is located in the arc hole 41e, the small diameter portion 44c is located in the guide pin mounting hole 42f, and the tip of the small diameter portion 44c is from the guide pin mounting hole 42f (flat plate portion 42b). It protrudes inside the seat. By crimping the protruding portion of the small diameter portion 44c to form the crimped portion 44d, the flat plate portion 41a and the flat plate portion 42b are sandwiched between the head portion 44a and the crimped portion 44d. The small diameter portion 44c is inserted into the guide pin mounting hole 42f with almost no rattling. The width of the arc hole 41e is larger than the diameter of the guide pin mounting hole 42f, and the outer peripheral surface of the intermediate diameter portion 44b can be moved along the pair of arc surfaces facing each other of the arc hole 41e. As shown in FIG. 3, the leg portion 40b of the first bracket 40 has a curved wall surface along the arc hole 41e, and the leg portion with respect to the head portion 44a of the guide pin 44 protruding from the arc hole 41e. 40b does not interfere. Further, the rigidity of the leg portion 40b is increased due to this curved shape. Further, the leg portion 40c of the first bracket 40 also has a curved shape and has high rigidity.

A caulking pin 45 (FIGS. 2 and 5) is inserted into the fastening hole 40g and the fastening hole 41d. The caulking pin 45 has a head and a small diameter portion, and the support plate portion 40a and the flat plate portion 41a are formed by caulking the tip of the small diameter portion inserted into the fastening hole 40g and the fastening hole 41d without rattling. Fasten and fix. The support plate portion 40a and the flat plate portion 41a are further fixed by welding.

As shown in FIG. 13, the pedestal portion 40d and the pedestal portion 40e of the first bracket 40 abut on the outer surface of the seat of the lower bracket 11, and the pedestal portion 40d and the pedestal portion 40e are fastened to the lower bracket 11 by caulking pins 46, respectively. It is fixed. In this fixed state, a space surrounded by the support plate portion 40a, the leg portion 40b, the leg portion 40c, and the lower bracket 11 is formed, and the support plate portion 40a faces the outer surface of the seat of the lower bracket 11 apart from each other.

With the above configuration, the first bracket 40 and the support guide plate 41, which are fixed to each other, are fixedly supported by the lower bracket 11. The handle fastening member 42 is rotatably supported around the shaft member 43 in a state where the flat plate portion 42a and the flat plate portion 42b are in contact with the flat plate portion 41a of the support guide plate 41. The intermediate diameter portion 44b of the guide pin 44 moves in the arc hole 41e with the rotation of the handle fastening member 42, and the intermediate diameter portion 44b comes into contact with the end portions 41e-1 and the end portion 41e-2 of the arc hole 41e. The rotation of the handle fastening member 42 is restricted by. That is, the angle range in which the handle fastening member 42 swings (rotates) is determined by the guide pin 44 and the arc hole 41e.

The release handle 6 is fixed to the handle fastening member 42. As shown in FIG. 2, at one end of the release handle 6, a flat plate portion 6a that comes into contact with the flat plate portion 42c of the handle fastening member 42 is formed, and two fastening holes 6b are formed in the flat plate portion 6a. The spring hook piece 6c protrudes from the flat plate portion 6a toward the outside of the seat. The flat plate portion 6a is brought into contact with the flat plate portion 42c in a positional relationship in which the two fastening holes 6b and the two handle fastening holes 42g overlap, and the caulking pins 47 (FIGS. 2 and 5) are brought into contact with each fastening hole 6b and the handle fastening hole 42g. ) Is inserted and caulked to fasten and fix the release handle 6 and the handle fastening member 42. Therefore, the joint of the release handle 6 and the handle fastening member 42 can swing (rotate) with respect to the first bracket 40 and the support guide plate 41 fixedly supported by the lower bracket 11 via the shaft member 43. Be supported. The central axis of the shaft member 43 is the rotation center 6x (FIG. 1) of the release handle 6 shown in FIG.

The coil portion of the torsion spring 48 is supported on the outside of the large diameter portion 43a of the shaft member 43. The torsion spring 48 has a pair of spring ends protruding from the coil portion, one spring end portion engages with the spring hook piece 6c of the release handle 6, and the other spring end portion springs the support guide plate 41. Engage with piece 41b. A force for rotationally urging the release handle 6 is applied by the torsion spring 48, and this urging force is in the direction in which the guide pin 44 (intermediate diameter portion 44b) abuts on the end portion 41e-1 of the arc hole 41e (FIGS. 5 and 7). , Clockwise in FIGS. 9 and 11, counterclockwise in FIGS. 6, 8, 10 and 12). The position where the guide pin 44 comes into contact with the end portion 41e-1 of the arc hole 41e is set as the initial position of the release handle 6.

On the outer surface of the seat of the lower bracket 11, the position of the second bracket (cable support member) is different from that of the first bracket 40 below the position where the open plate 20, the first lever 21, and the second lever 30 are supported. ) 49 is fixed. The second bracket 49 has a flat plate-shaped pedestal portion 49a and a standing wall portion 49b protruding from the pedestal portion 49a toward the outside of the seat, and the pedestal portion 49a abuts on the outer surface of the seat of the lower bracket 11. It is fastened and fixed to the lower bracket 11 by two caulking pins 50 (FIGS. 2 and 5). The vertical wall portion 49b is formed with a cable support groove (cable support portion) 49c and a cable support groove (cable support portion) 49d at different positions in the front-rear direction of the seat.

When the release handle 6 is operated, the operating force is transmitted to the open plate 20 via the connecting rod 55. One end 55a of the connecting rod 55 is connected to the rod mounting hole 42h formed in the flat plate portion 42d of the handle fastening member 42 which is fixed to the release handle 6, and the connecting rod 55 is connected to the arc hole 20c of the open plate 20. The other end 55b is connected. The end portion 55b is movable in the arc hole 20c, and the end portion 55b is located near the lower end portion of the arc hole 20c at the initial position of the release handle 6. Then, when the release handle 6 is rotated from the initial position in the pulling direction (counterclockwise direction in FIG. 5 and clockwise direction in FIG. 6) against the urging force of the torsion spring 48, the end portion 55b is below the arc hole 20c. The force is transmitted by contacting the end portion, and the open plate 20 is rotated from the locked position to the unlocked position (rotation in the counterclockwise direction in FIG. 5). In addition, in FIG. 5, FIG. 7, FIG. 9 and FIG. 11, the intermediate portion of the connecting rod 55 is omitted in order to make it easier to see the other members.

When the walk-in operation lever 7 is operated, the operation force is transmitted to the open plate 20 via the operation cable 56. The end portion 56a of the operation cable 56 is connected to the cable connection hole 20b of the open plate 20. The operation cable 56 extends downward from the cable connection hole 20b and is inserted into a tubular cable guide 57 (partially shown in FIGS. 3 and 4) so as to be able to advance and retreat. The fitting portion 57a provided at the end of the cable guide 57 fits into the cable support groove 49c provided in the second bracket 49, and the movement of the operation cable 56 in the extending direction is restricted. Although not shown, the operation cable 56 turns and extends upward below the second bracket 49 and is connected to the walk-in operation lever 7. When the walk-in operation lever 7 is operated, a force that pulls the vicinity of the cable connection hole 20b downward is applied via the operation cable 56, and the open plate 20 is rotated from the lock position to the unlock position (counterclockwise in FIG. 5). Rotate). When the open plate 20 is rotated to the unlocked position by the traction of the operation cable 56, the position of the end portion 55b of the connecting rod 55 in the arc hole 20c changes relatively, and the open plate 20 with respect to the connecting rod 55. The force in the rotational direction is not transmitted, and the release handle 6 maintains the initial position.

The end portion 58a of the linking cable 58 is connected to the cable connection hole 20d of the open plate 20. The linkage cable 58 links the seat reclining device 10 provided on one side of the vehicle seat 1 with the seat reclining device provided on the opposite side (left side when facing the traveling direction of the vehicle), and is downward from the cable connection hole 20d. It extends toward the cable guide 59 (partially shown in FIGS. 3 and 4) and is inserted into a tubular cable guide 59 so as to be able to advance and retreat. The fitting portion 59a provided at the end of the cable guide 59 fits into the cable support groove 40i provided in the first bracket 40, and the movement of the linked cable 58 in the extending direction is restricted. The reclining device provided on the opposite side of the vehicle seat 1 is not shown as a whole, but the open plate (moving member) 70 (shown in FIG. 5) corresponding to the open plate 20 and the reclining lock mechanism It has a reclining lock mechanism 71 (shown in FIG. 5) corresponding to 14. The open plate 70 rotates about the hinge pin 72 to bring the reclining lock mechanism 71 into the locked state and the unlocked state. As shown in FIG. 5, the linkage cable 58 exits from the fitting portion 59b provided at the other end of the cable guide 59, and the end 58b of the linkage cable 58 is connected to the cable connection portion 70a provided on the open plate 70. To do. The cable connection portion 70a has a slit shape in which the end portion 58b of the linkage cable 58 fits in the cable extending direction with a margin, and can absorb the bending of the linkage cable 58. When the open plate 20 rotates to the locked position and the unlocked position, the open plate 70 rotates via the linking cable 58, and the reclining lock mechanism 14 and the reclining lock mechanism 71 are interlocked to switch between the locked state and the unlocked state. The seat reclining device on the side provided with the open plate 70 does not have the release handle 6.

When the falldown operation lever 8 is operated, the operation force is transmitted to the first lever 21 via the operation cable 60. The end 60a of the operation cable 60 is connected to the cable connecting portion 21d of the first lever 21. The cable connection portion 21d has a slit shape in which the end portion 60a of the operation cable 60 fits in the cable extending direction with a margin, and can absorb the bending of the operation cable 60. The operation cable 60 extends downward from the cable connection portion 21d and is inserted into a tubular cable guide 61 (partially shown in FIG. 3) so as to be able to advance and retreat. The fitting portion 61a provided at the end of the cable guide 61 fits into the cable support groove 49d provided in the second bracket 49, and the movement of the operation cable 60 in the extending direction is restricted. Although not shown, the operation cable 60 turns and extends upward below the second bracket 49 and is connected to the falldown operation lever 8. When the falldown operation lever 8 is operated while the first lever 21 is in the forward tilt limiting position shown in FIG. 7, a force is applied to pull the vicinity of the cable connection portion 21d downward via the operation cable 60, and the first lever 21 is pushed. Rotate (rotate counterclockwise in FIG. 7) toward the restriction release position.

The end portion 62a of the slide lock operation cable 62 is connected to the cable connection portion 30d of the second lever 30. The cable connection portion 30d has a slit shape in which the end portion 62a of the slide lock operation cable 62 fits in the cable extending direction with a margin, and can absorb the bending of the slide lock operation cable 62. The slide lock operation cable 62 extends downward from the cable connection portion 30d and is inserted into a tubular cable guide 63 (partially shown in FIGS. 3 and 4) so as to be able to advance and retreat. The fitting portion 63a provided at the end of the cable guide 63 fits into the cable support groove 40j provided in the first bracket 40, and the movement of the slide lock operation cable 62 in the extending direction is restricted. The slide lock operation cable 62 is connected to an unlock member (not shown) which is a component of the slide lock mechanism 3. When the second lever 30 is in the holding position (FIGS. 5 and 9) or the over holding position (FIG. 11), the slide lock state is maintained without operating the lock release member, and the second lever 30 is in the holding release position (FIG. 11). When rotated to 7), the traction force of the slide lock operation cable 62 is transmitted to the unlock member, and the unlock member performs the slide lock release operation (shift to the slide allowable state).

The operation of the seat reclining device 10 configured as described above will be described. 5 and 6 show a seat reclining device 10 in a seated state in which the seat back 5 is in the reclining range R (an angle close to the first stage lock position 5A in FIG. 1). At this time, the release handle 6 is held in the initial position by the urging force of the torsion spring 48, and the reclining lock mechanism 14 (71) is in a locked state in which the angle of the upper bracket 12 (seat back 5) is fixed (to regulate tilting). It has become. The open plate 20 (70) is in the locked position depending on the locked state of the reclining lock mechanism 14 (71). The second lever 30 and the cancel lever 31 are held in the holding position and the neutral position by the urging force of the torsion spring 33, respectively. The spring hooking portion 30e of the second lever 30 sandwiched between the pair of spring end portions of the torsion spring 33 and the cut-up piece 11e of the lower bracket 11 are in a positional relationship of overlapping each other. By locating the hook portion 30c of the second lever 30 in the holding position on the movement locus of the linking pin 23, the first lever 21 is held in the restriction release position against the urging force of the tension spring 26. Since the urging force of the torsion spring 33 that urges the second lever 30 is set stronger than the urging force of the tension spring 26 that urges the first lever 21, the restriction release position by the second lever 30 is set. The holding of the first lever 21 is maintained. Further, since the second lever 30 is in the holding position, the lock release operation of the slide lock mechanism 3 via the slide lock operation cable 62 is not performed. As shown in FIG. 6, the control protrusion 25 provided on the upper bracket 12 is separated from the cancel lever 31 and the stopper pin 24, and the control protrusion 25, the cancel lever 31, and the stopper pin 24 are located in this order from the front side of the vehicle. ..

When the release handle 6 is rotated from the initial position in the pulling direction (counterclockwise direction in FIG. 5 and clockwise direction in FIG. 6) against the urging force of the torsion spring 48 in the seated state of FIGS. 5 and 6, the connecting rod The open plate 20 rotates from the locked position to the unlocked position (rotation in the counterclockwise direction in FIG. 5) via the 55, and the reclining lock mechanism 14 is in the unlocked state. Further, the open plate 70 is interlocked by the linking cable 58, and the reclining lock mechanism 71 is in the unlocked state. The release handle 6 can be rotated in the pulling direction until the intermediate diameter portion 44b of the guide pin 44 abuts on the end portion 41e-2 of the arc hole 41e (FIG. 7). Here, when the operation of the release handle 6 is released after changing the angle of the seat back 5 within the reclining range R by an external force such as human power, the reclining lock mechanism 14 returns to the locked state and the seat back 5 is changed. It can be maintained at an angle.

When the open plate 20 (70) rotates from the locked position to the unlocked position and the reclining lock mechanism 14 (71) is in the unlocked state, if the seat back 5 is not held by an external force such as human power, The seat back 5 is tilted to the unlock range U ahead of the reclining range R by the urging force of the forward tilting urging spring 16, and the slide lock by the slide lock mechanism 3 is released, which is a so-called walk-in state.

The rotation of the open plate 20 to the unlocked position when the walk-in state is set can be performed by operating either the release handle 6 or the walk-in operation lever 7. When the release handle 6 is operated, the force is transmitted to the open plate 20 via the connecting rod 55 as described above. When the walk-in operation lever 7 is operated, the force is transmitted to the open plate 20 via the operation cable 56. In either case, the open plate 20 rotates from the locked position to the unlocked position, the reclining lock mechanism 14 is in the unlocked state, and the upper bracket 12 with respect to the lower bracket 11 due to the urging force of the forward tilting urging spring 16. Tilt forward.

When the upper bracket 12 is tilted forward by a predetermined amount in the unlock range U, the control protrusion 25 approaches and comes into contact with the pressed protrusion 31c of the cancel lever 31. At this time, the first pressing surface 25a of the control protrusion 25 comes into contact with the side surface 31d of the cancel lever 31 (a portion close to the tip curved surface 31f), and the force in the rotational direction of the upper bracket 12 is transmitted to the cancel lever 31. .. The forward tilting urging force exerted by the forward tilting urging spring 16 on the upper bracket 12 is set to be larger than the force by which the torsion spring 33 urges the cancel lever 31 to the neutral position, and the torsion spring 33 is attached. The control protrusion 25 presses the cancel lever 31 against the force to rotate the cancel lever 31 from the neutral position of FIG. 6 to the first missed swing position of FIG. 8 (rotation in the clockwise direction of FIG. 6).

When the cancel lever 31 rotates from the neutral position to the first idle swing position, the second lever 30 that rotates integrally with the cancel lever 31 rotates from the holding position of FIG. 5 to the holding release position of FIG. 7 (counterclockwise of FIG. 5). Rotate clockwise). As shown in FIGS. 7 and 8, at this time, the spring hooking portion 30e of the second lever 30 presses and moves one spring end portion of the torsion spring 33, and the urging force of the torsion spring 33 is charged. When the second lever 30 rotates to the holding release position, the hook portion 30c retracts from the movement locus of the linking pin 23 (the linking pin 23 separates from the recess 30f), and the rotation restriction on the first lever 21 is released. The first lever 21 is rotated by the urging force of the tension spring 26 from the restriction release position of FIG. 5 to the forward tilt restriction position of FIG. 7 (clockwise rotation of FIG. 5). When the first lever 21 reaches the forward tilt limiting position, the stopper pin 24 is located on the movement locus of the control protrusion 25 as shown in FIG. 8, and the first pressing surface 25a of the control protrusion 25 is positioned with respect to the stopper pin 24. By abutting, the forward tilt of the upper bracket 12 is restricted. The angular position of the seat back 5 at this time is the intermediate stop position 5B shown in FIG.

In order to reliably stop the upper bracket 12 at the positions shown in FIGS. 7 and 8 by the stopper pin 24, the first lever 21 must be moved before the control protrusion 25 passes through the angular position where the arc hole 11c of the lower bracket 11 overlaps. It is necessary to set the timing of operation so that the forward fall limit position is reached. As shown in FIG. 5, with the first lever 21 in the restriction release position and the second lever 30 in the holding position, the tip of the hook portion 30c is from the position where the linking pin 23 is in contact with the contact edge portion 30g. After the cancel lever 31 is pressed by the control protrusion 25, the hook portion 30c releases the holding of the linking pin 23, and the stopper pin 24 advances onto the movement trajectory of the control protrusion 25. There is a time lag before the first lever 21 reaches the forward tilt limit position. When the length of the portion of the hook portion 30c is shortened, the timing until the first lever 21 starts rotating toward the forward tilt limiting position becomes earlier. On the other hand, if the hook portion 30c is made too short, there is a high risk that the linking pin 23 will come off due to an accuracy error between the parts or an impact from the outside in the holding state shown in FIG. The length and angle of the hook portion 30c of the present embodiment are such that the first lever 21 is rotated to the forward tilt limiting position at a suitable timing without delay while preventing irregular detachment of the linking pin 23.

Further, when the second lever 30 rotates from the holding position to the holding release position, the slide lock operation cable 62 is pulled to release the slide lock of the slide lock mechanism 3. At the angular position of the upper bracket 12 (intermediate stop position 5B of the seat back 5) where the first pressing surface 25a of the control protrusion 25 abuts on the stopper pin 24, as shown in FIG. 8, the peripheral curved surface 25c of the control protrusion 25 On the other hand, the vicinity of the tip of the pressed protrusion 31c (near the boundary between the side surface 31d and the tip curved surface 31f) comes into contact with each other, and the cancel lever 31 is held in the first idle swing position with the return to the neutral position restricted. Therefore, the second lever 30 is held at the holding release position, and the state in which the slide lock operation cable 62 is towed is maintained.

In this way, the seat back 5 tilts to the unlock range U in front of the reclining range R and the slide lock is released, so that it is easy to get in and out of the rear space (rear seat) of the vehicle seat 1. It becomes a state. The slide spring that urges the vehicle seat 1 toward the front may be set to a strength that automatically slides the vehicle seat 1 forward when the slide lock is released, or the vehicle seat 1 may be set. May be set to a strength that assists the manual sliding of the vehicle forward (the vehicle seat 1 does not slide forward only by the urging force of the sliding spring).

Even if the release handle 6 and the walk-in operation lever 7 are released, the walk-in states of FIGS. 7 and 8 are maintained. When the pulling operation of the release handle 6 is released, the release handle 6 returns to the initial position shown in FIG. 5 by the urging force of the torsion spring 48. When the operation of the walk-in operation lever 7 is released, the operation cable 56 is in a relaxed state. In response to this, the reclining lock mechanism 14 operates in the direction of returning to the locked state while rotating the open plate 20 in the counterclockwise direction of FIG. However, the reclining lock mechanism 14 is provided with a meshing regulating portion (not shown) that regulates the meshing of the outer teeth of the lock member and the internal teeth of the ratchet plate 14b when the seat back 5 is in the unlock range U. Therefore, in the walk-in state, the reclining lock mechanism 14 does not lock.

When canceling the walk-in state of FIGS. 7 and 8 and returning to the seated state, the seat back 5 is raised from the intermediate holding position 5B. Since the control protrusion 25 is separated from the cancel lever 31 (the contact relationship is released) due to the tilt of the upper bracket 12 accompanying the raising of the seat back 5, the second lever 30 is held and released by the urging force of the torsion spring 33 (FIG. The cancel lever 31 returns from the first idle swing position (FIG. 8) to the neutral position (FIG. 6) while returning from the holding position (FIG. 5) from 7). When the second lever 30 returns to the holding position, the traction of the slide lock operation cable 62 is released, and the slide lock mechanism 3 returns to the locked state. Further, when the second lever 30 returns to the holding position, the contact edge portion 30g of the hook portion 30c comes into contact with the linking pin 23, and the first lever 21 is tilted forward while the linking pin 23 is pulled into the recess 30f. Rotate from (FIG. 7) to the restriction release position (FIG. 5). Then, when the seat back 5 is raised to the first stage lock position 5A, the reclining lock mechanism 14 returns to the locked state, the angle of the seat back 5 is fixed, and the seat reclining device 10 returns to the state shown in FIGS. 5 and 6.

When the falldown operation lever 8 is operated in the walk-in state shown in FIGS. 7 and 8, the operation cable 60 is towed and the first lever 21 rotates from the forward tilt limiting position to the restriction release position (counterclockwise in FIG. 7). Rotate. Then, the stopper pin 24 on the first lever 21 retracts downward from the position where it comes into contact with the control protrusion 25 of the upper bracket 12, and the upper bracket 12 can be tilted further forward without being restricted by the stopper pin 24. As a result, the seat back 5 can be tilted forward from the intermediate stop position 5B.

When the seat back 5 is tilted to the falldown position 5C of FIG. 1, the seat reclining device 10 is in the falldown state shown in FIGS. 9 and 10. As shown in FIG. 10, as a result of the seat back 5 tilting forward from the intermediate stop position 5B, the control protrusion 25 of the upper bracket 12 has passed the position where the pressed protrusion 31c of the cancel lever 31 is pressed, and the control protrusion 25 has passed. The cancel lever 31 released from the pressing force is returned from the first idle swing position to the neutral position by the urging force of the torsion spring 33. When the control protrusion 25 moves from the contact position (FIG. 8) of the cancel lever 31 with the pressed protrusion 31c to the position shown in FIG. 10, the peripheral curved surface 25c on the control protrusion 25 side and the tip curved surface on the cancel lever 31 side. Since the vicinity of 31f is in contact with each other, the control protrusion 25 can smoothly get over the cancel lever 31.

Further, as shown in FIG. 9, the second lever 30 returns from the holding release position to the holding position by the urging force of the torsion spring 33 with the passage of the control protrusion 25, and the first lever 21 is restricted by the hook portion 30c. Hold on. Further, when the second lever 30 returns to the holding position, the traction state of the slide lock operation cable 62 is released, and the slide lock mechanism 3 is brought into the slide lock state. Therefore, when the seat back 5 is set to the falldown position 5C, the position of the vehicle seat 1 in the front-rear direction is fixed.

When raising the seat back 5 from the falldown position 5C, the control protrusion 25 of the upper bracket 12 first passes through the position overlapping the arc hole 11c of the lower bracket 11, and then the cancel lever 31, contrary to the case of moving forward. Approach. Here, since the first lever 21 is held at the restriction release position, the control protrusion 25 of the upper bracket 12 can pass through the position where it overlaps with the arc hole 11c without being hindered by the stopper pin 24. As shown in FIGS. 9 and 10, there is a gap between the stopper pin 24 and the lower end of the arc hole 11c in a state where the linking pin 23 is in contact with the contact edge portion 30g of the hook portion 30c, and this gap. The range of motion of the minute is given to the restriction release position of the first lever 21. Therefore, when the control protrusion 25 passes the position where it overlaps with the arc hole 11c, the peripheral curved surface 25c comes into contact with the stopper pin 24 and presses downward (the first lever 21 is slightly rotated within the restriction release position). While) it is possible to move. Further, since the second pressing surface 25b of the control protrusion 25 is provided with a constant inclination angle, the control protrusion 25 is provided even when the second pressing surface 25b, not the peripheral curved surface 25c, comes into contact with the stopper pin 24. It is possible to press the stopper pin 24 downward. That is, in the raising operation of the seat back 5 from the falldown position 5C, the tilting of the seat back 5 is not hindered even if the control protrusion 25 comes into contact with the stopper pin 24.

As shown in FIG. 10, since the cancel lever 31 is in the neutral position at the falldown position 5C of the seatback 5, when the upper bracket 12 is tilted by the raising operation of the seatback 5 from the falldown position 5C, the control protrusion 25 is moved. It comes into contact with the pressed protrusion 31c. More specifically, the second pressing surface 25b of the control projection 25 comes into contact with the side surface 31e of the pressed projection 31c of the cancel lever 31. When the upper bracket 12 continues to tilt in the raising direction in this state, the cancel lever 31 is pressed from the neutral position in the counterclockwise direction of FIG. 10 against the urging force of the torsion spring 33, and the second second shown in FIG. Rotate to the missed position.

As the cancel lever 31 rotates to the second missed swing position, the second lever 30 rotates from the holding position to the over-holding position shown in FIG. As described above, from the position where the linking pin 23 is in contact with the contact edge portion 30g in the state where the first lever 21 is in the restriction release position and the second lever 30 is in the holding position (FIGS. 5 and 9). A predetermined length is secured up to the tip of the hook portion 30c, but in this state, the base end of the hook portion 30c (the innermost part of the recess 30f) is further from the position where the linking pin 23 is in contact with the contact edge portion 30g. A predetermined length is secured up to the part). In other words, the linking pin 23 is in contact with the hook portion 30c (contact edge portion 30g) near the center in the longitudinal direction. Then, when the second lever 30 rotates from the holding position (FIGS. 5 and 9) to the over-holding position (FIG. 11), the linking pin 23 is brought into contact with the contact edge portion 30g, and the recess 30f is at the maximum. Change the position near the back. In this way, the second lever 30 is set in a shape that maintains the contact between the contact edge portion 30 g and the linking pin 23 while rotating from the holding position (FIGS. 5 and 9) to the over-holding position (FIG. 11). The first lever 21 is continuously held in the restriction release position at the overholding position of the second lever 30. Further, since the slide lock operation cable 62 is not pulled when the second lever 30 is rotated to the overholding position, the slide lock state of the slide lock mechanism 3 is maintained. As shown in FIGS. 11 and 12, when the second lever 30 rotates to the overholding position, the spring hooking portion 30e presses and moves one spring end portion of the torsion spring 33, and the urging force of the torsion spring 33 is charged. Will be done.

FIG. 12 shows a state in which the vicinity of the boundary between the first pressing surface 25a of the control protrusion 25 and the peripheral curved surface 25c is in contact with the tip curved surface 31f of the pressed protrusion 31c of the cancel lever 31 at the second missed swing position. As shown above, when the upper bracket 12 is raised and tilted in the direction from this state, the control protrusion 25 gets over the pressed protrusion 31c and separates from the cancel lever 31. Then, the cancel lever 31 returns to the neutral position due to the urging force of the torsion spring 33, and the second lever 30 returns to the holding position. Further, when the seat back 5 is raised to the first stage lock position 5A, the reclining lock mechanism 14 returns to the locked state, the angle of the seat back 5 is fixed, and the seat reclining device 10 returns to the state shown in FIGS. 5 and 6.

As described above, the seat reclining device 10 can change from the seated state shown in FIGS. 5 and 6 to the walk-in state shown in FIGS. 7 and 8 and the falldown state shown in FIGS. 9 and 10. The second lever 30 allows the first lever 21 to rotate from the restriction release position to the forward tilt restriction position immediately before the seat back 5 reaches the intermediate stop position 5B of the unlock range U from the reclining range R, and other than that. In the state, the first lever 21 is held at the restriction release position. Therefore, after rotating the first lever 21 from the forward tilt limiting position to the restriction release position and tilting the seat back 5 ahead of the intermediate stop position 5B in the walk-in state (for example, the falldown position 5C), the seat back 5 The first lever 21 does not return to the forward tilt limit position during the raising operation. For example, if the seat back 5 is released in the middle of raising from the fall down position 5C to the first stage lock position 5A, the seat back 5 is not stopped at the intermediate stop position 5B by the stopper pin 24 but is moved to the fall down position 5C. You can go back. Therefore, when the falldown operation lever 8 is operated to shift from the walk-in state (FIGS. 7 and 8) to the falldown state (FIGS. 9 and 10), foreign matter is caught between the seat cushion 4 and the seat back 5. When the seat back 5 is once raised halfway in order to cope with such a situation, the seat back 5 is not stopped at the intermediate stop position 5B (without operating the fall down operation lever 8 again), and then the fall down position 5C is performed. It is possible to prevent the operation from being complicated.

The seat reclining device 10 includes a total of four cables: an operation cable 56 connected to the open plate 20, a linking cable 58, an operation cable 60 connected to the first lever 21, and a slide lock operation cable 62 connected to the second lever 30. Is provided. Of these, the linking cable 58 and the slide lock operation cable 62 are supported by the first bracket 40 via the cable support groove 40i and the cable support groove 40j, and the operation cable 56 and the operation cable 60 are supported by the cable support groove 49c and the cable support groove. It is supported by the second bracket 49 via 49d. In this way, the configuration in which each cable is supported by the brackets 40 and 49 is freer in productivity and arrangement of the cable support location as compared with the configuration in which the cable support portion is directly formed on the lower bracket 11 which is a large member. Excellent in degree. Since each of the brackets 40 and 49 supports a plurality of cables, the number of parts related to the cable support can be reduced and the configuration can be simplified. Further, of the four cables 56, 58, 60 and 62, the first bracket 40 and the second bracket 49 support the two cables arranged close to each other, so that the individual brackets 40 and 49 The cable support portion (side plate 40h and vertical wall portion 49b) in the above can be compactly configured to save space.

As shown in FIGS. 3 and 4, the portion of the open plate 20 having the cable connection hole 20b and the cable connection portion 21d of the first lever 21 are in the height direction with respect to the lower bracket 11 (width direction of the vehicle seat 1). The positions of the cables are different from each other, the cable connection hole 20b is located far from the base surface of the lower bracket 11 (high position), and the cable connection portion 21d is located near the base surface of the lower bracket 11 (low position). Correspondingly, the end portion 56a of the operation cable 56 and the end portion 60a of the operation cable 60 are different from each other in the height direction.

As shown in FIGS. 3 and 21, the cable support groove 49c and the cable support groove 49d of the second bracket 49 are grooves extending in the height direction, respectively, and are the base end side (height) of the standing wall portion 49b close to the pedestal portion 49a. The end on the lower side in the direction) is closed to become the bottom, and the end on the tip side (higher side in the height direction) of the standing wall portion 49b far from the pedestal portion 49a is open. The cable support groove 49c and the cable support groove 49d are arranged on the standing wall portion 49b at different positions in the height direction, the cable support groove 49c is located at a position far from the pedestal portion 49a (high position), and the cable connection portion. 21d is located near the pedestal portion 49a (lower position).

Therefore, the operation cable 56 extending from the cable connection hole 20b to the cable support groove 49c (fitting portion 57a fitted in the cable support groove 49c) and the cable support groove 49d (fitting portion 61a fitting in the cable support groove 49d) from the cable connecting portion 21d. The operation cable 60 extending to) is guided to the second bracket 49 while maintaining the positional relationship (height relationship) in the height direction between the cable connection hole 20b and the cable connection portion 21d, and does not intersect with each other in the height direction. Be arranged. According to this configuration, the operation cable 56 and the operation cable 60 do not interfere with each other even if they intersect or are close to each other in a plan view as shown in FIGS. 5, 7, 9, and 11, and the cable arrangement is performed. The degree of freedom can be increased. In particular, the open plate 20 having the cable connection hole 20b and the first lever 21 having the cable connection portion 21d have a relationship in which their rotation loci partially overlap each other in a plan view (see FIG. 7), and thus have a height. It is effective to provide two cables 56 and 60 so as not to intersect in the direction. Further, the cables 56 and 60, which are separated from each other in the height direction without intersecting with each other, can be easily identified at the time of assembling, which contributes to the improvement of workability.

Further, as shown in FIGS. 3 and 4, the portion of the open plate 20 having the cable connection hole 20d and the cable connection portion 30d of the second lever 30 are different from each other in the height direction with respect to the lower bracket 11. The cable connection hole 20d is located far from the base surface of the lower bracket 11 (high position), and the cable connection portion 30d is located close to the base surface of the lower bracket 11 (low position). Correspondingly, the end portion 58a of the linkage cable 58 and the end portion 62a of the slide lock operation cable 62 are different from each other in the height direction.

As shown in FIGS. 3 and 18, the cable support groove 40i and the cable support groove 40j of the first bracket 40 are grooves extending in a direction substantially perpendicular to the height direction, respectively, and are formed on the side plate 40h close to the leg portion 40b. The end portion on the base end side is closed to form the bottom portion, and the end portion on the tip end side of the side plate 40h far from the leg portion 40b is open. The cable support groove 40i and the cable support groove 40j are arranged on the side plate 40h at different positions in the height direction, and the cable support groove 40i is located at a position (high position) far from the pedestal portion 40d, and the cable support groove 40j Is at a position (lower position) close to the pedestal portion 40d.

Therefore, the linked cable 58 extending from the cable connection hole 20d to the cable support groove 40i (fitting portion 59a fitted in the cable support groove 40i) and the cable support groove 40j (fitting portion 63a fitted in the cable support groove 40j) from the cable connecting portion 30d. ), The slide lock operation cable 62 is guided to the first bracket 40 while maintaining the positional relationship (height relationship) in the height direction between the cable connection hole 20d and the cable connection portion 30d, and intersects with each other in the height direction. It is arranged without. According to this configuration, the linkage cable 58 and the slide lock operation cable 62 do not interfere with each other even if they intersect or are close to each other in a plan view as shown in FIGS. 5, 7, 9, and 11. The degree of freedom of placement can be increased. Further, the cables 58 and 62, which are separated from each other in the height direction without intersecting with each other, can be easily identified at the time of assembling, which contributes to the improvement of workability.

FIG. 22 schematically shows the positional relationship in the height direction of each of the two cables supported by the first bracket 40 and the second bracket 49. The operation cable 56 and the operation cable 60 are supported by the cable support groove 49c and the cable support groove 49d rather than the height distance between the end portion 56a and the end portion 60a supported by the cable connection hole 20b and the cable connection portion 21d. The distance between the fitting portion 57a and the fitting portion 61a in the height direction is larger. Therefore, the distance between the operation cable 56 and the operation cable 60 in the height direction is gradually increased from the side of the cable connection hole 20b and the cable connection portion 21d toward the side of the cable support groove 49c and the cable support groove 49d. Similarly, for the linking cable 58 and the slide lock operation cable 62, the cable support groove 40i and the cable support are provided rather than the height distance between the end portion 58a and the end portion 62a supported by the cable connection hole 20d and the cable connection portion 30d. The distance between the fitting portion 59a supported by the groove 40j and the fitting portion 63a in the height direction is larger. Therefore, the distance between the linking cable 58 and the slide lock operation cable 62 in the height direction is gradually increased from the side of the cable connection hole 20d and the cable connection portion 30d toward the side of the cable support groove 40i and the cable support groove 40j. ..

The positional relationship between the two cables in the height direction can be set as shown in FIGS. 23 and 24, unlike FIG. 22. In FIG. 23, the operation cable 56 (linkage cable 58) and the operation cable 60 (slide lock operation cable 62) are cabled from the side of the cable connection hole 20b (cable connection hole 20d) and the cable connection portion 21d (cable connection portion 30d). The distance in the height direction is gradually reduced toward the side of the support groove 49c (cable support groove 40i) and the cable support groove 49d (cable support groove 40j). In FIG. 24, the operation cable 56 (linkage cable 58) and the operation cable 60 (slide lock operation cable 62) are connected to the cable support groove from the cable connection hole 20b (cable connection hole 20d) and the cable connection portion 21d (cable connection portion 30d). The distance in the height direction is substantially constant up to 49c (cable support groove 40i) and cable support groove 49d (cable support groove 40j).

In the form shown in FIG. 22, it is easy to increase the distance between the two cable guides (cable guide 57 and cable guide 61, cable guide 59 and cable guide 63) fixed to the common bracket. There is an advantage that the cables 56, 58, 60 and 62 (fitting portions 57a, 59a, 61a and 63a) can be easily assembled to the second bracket 49. The form shown in FIG. 23 shows the cables 56, 58, 60 and 62 at positions close to the ends 56a, 58a, 60a and 62a when the open plate 20, the first lever 21 and the second lever 30 rotate. It has the advantage that interference is unlikely to occur. In the form shown in FIG. 24, the forces are transmitted by the cables by extending the cables 56, 58, 60 and 62 in a direction substantially perpendicular to the rotation center of the open plate 20, the first lever 21 and the second lever 30. Efficient driving can be realized by suppressing the loss at the time. In either form, the cable support grooves 40i, 40j and the second bracket 49 of the first bracket 40 depend on the positional relationship of the cable connection points in the open plate 20, the first lever 21, and the second lever 30 in the height direction. This can be achieved by appropriately setting the positional relationship between the cable support grooves 49c and 49d.

Although the present invention has been described above based on the illustrated embodiment, the present invention is not limited to the illustrated embodiment and can be improved or modified without departing from the gist of the invention.

In the embodiment, the operation cable 56 for operating the open plate 20 involved in the operation of the reclining lock mechanism 14 and the first lever 21 involved in the operation of the stopper pin 24 for holding the seat back 5 at the intermediate holding position 5B are provided. The operation cable 60 for operation is supported by the second bracket 49. Further, the first bracket 40 supports the linking cable 58 that links the open plates 20 and the open plates 70 on both sides of the seat and the slide lock operation cable 62 that operates the slide lock mechanism 3 in response to the seat back 5 tilting forward. ing. In the vehicle seat drive device of the present invention, the roles of the plurality of cables supported by the cable support members corresponding to the brackets 40 and 41 are not limited to this embodiment, and the seat back operation mechanism and the slide lock It can be applied to support any cable as long as it is related to the operation of the mechanism.

Although the first bracket 40 and the second bracket 49 of the embodiment each support two cables, one cable support member may support three or more cables. For example, unlike the embodiment, when the cable connection portion 30d of the second lever 30 is located near the cable connection portion 21d of the first lever 21, the linking cable 58 is added to the operation cable 56 and the operation cable 60. It is also possible to support the second bracket 49. In this case, the three operation cables 56, 58, and 60 are supported in a positional relationship in which the positions in the height direction are different from each other and do not intersect in the height direction.

The first bracket 40 of the embodiment has cable support grooves 40i and 40j, and the second bracket 49 has cable support grooves 49c and 49d. Such a groove shape can easily perform the insertion work when supporting the corresponding cable (cable guide fitting portion), and is also excellent in productivity and cost when forming each bracket. It is preferable because it is present. However, as the cable support portion of the present invention, it is also possible to adopt a configuration other than the groove shape (for example, a hook-shaped shape in which a part of the bracket is raised, a through hole formed through the bracket, or the like).

In the embodiment, the first bracket 40 and the second bracket 49 are provided as cable support members for supporting a plurality of cables, but the present invention is applicable to a vehicle seat drive device including at least one cable support member. It is possible. That is, any vehicle seat drive device including at least two cables is the subject of the present invention.

2 sheets truck 1 vehicle seat 3 slide lock mechanism 4 the seat cushion 5 seatback 5A seat back of the first-stage lock position 5B seatback fallback position 6 release handle 7 of the intermediate holding position 5C seatback of the walk-in operation lever 8 fall down Operating lever 10 Seat reclining device 11 Lower bracket (support member)
12 Upper bracket 13 Support plate 14 Reclining lock mechanism (reclining mechanism)
15 72 Hinge pin 16 Forward tilting spring 20 Open plate (operating member)
20a Non-circular hole 20b 20d Cable connection hole (cable connection part)
20c Arc hole 21 1st lever (moving member)
21a Shaft hole 21b 21c Pin support hole 21d Cable connection part 21e Spring hook hole 22 Shaft member 22a Circular cross section 23 Linking pin 24 Stopper pin 25 Control protrusion 25a First pressing surface 25b Second pressing surface 25c Peripheral curved surface 26 Tension spring 27 Spring hook 30 2nd lever (moving member)
30a Non-circular hole 30b Central part 30c Hook part 30d Cable connection part 30e Spring hook part 30f Recessed part 30g Contact edge part 31 Cancel lever 31c Pressed protrusion 32 Shaft member 33 Torsion spring 40 First bracket (cable support member)
40a Support plate 40b 40c Leg 40d 40e Pedestal 40f Shaft support hole 40g Fastening hole 40h Side plate 40i 40j Cable support groove (cable support)
41 Support guide plate 42 Handle fastening member 43 Shaft member 44 Guide pin 45 46 47 50 Caulking pin 48 Torsion spring 49 Second bracket (cable support member)
49a Pedestal 49b Standing wall 49c 49d Cable support groove (cable support)
55 Connection rod 56 Operation cable 56a End 57 Cable guide 57a Fitting part 58 Linked cable 58a 58b End 59 Cable guide 59a 59b Fitting part 60 Operation cable 60a End 61 Cable guide 61a Fitting part 62 Slide lock operation cable 62a End 63 Cable guide 63a Fitting 70 Open plate (operating member)
70a Cable connection 71 Reclining lock mechanism (reclining mechanism)
72 Hinge pin R Seat back reclining range

Claims (5)

A seat back operation that operates the seat back with respect to the seat cushion in a lock range in which the reclining mechanism operates and the angle can be set, and an unlock range in which the non-operating state of the reclining mechanism is maintained in front of the lock range. Mechanism and
The seat is provided with a slide lock mechanism that operates in a slide lock state that regulates the front-rear movement of the seat cushion and the seat back, and a slide lock release state that allows the front-back movement of the seat cushion and the seat back. In a vehicle seat drive device in which the back is in the unlock range and can be put into a walk-in state in which the slide lock is released.
It is movably supported by a support member fixed to the seat cushion and operates at least one of the seat back operation mechanism and the slide lock mechanism, or interlocks with at least one of the seat back operation mechanism and the slide lock mechanism. With multiple operating members
A plurality of cables interlocking with the movements of the plurality of operating members,
A cable support member provided on the support member and having a plurality of cable support portions for supporting the plurality of cables, and a cable support member.
The cable support member is a vehicle seat driving device for supporting a release handle for operating the reclining mechanism. The plurality of operating members include cable connection portions having different positions in the height direction with respect to the support member.
The positions of the plurality of cable supports differ in the height direction, and the positions are different.
The vehicle seat driving device according to claim 1, wherein the plurality of cables are arranged between the cable connecting portion and the cable supporting portion so as not to intersect each other in the height direction. The vehicle seat driving device according to claim 2, wherein the cables arranged in the height direction increase the distance between the cables in the height direction from the cable connection portion toward the cable support portion. The vehicle seat driving device according to claim 2, wherein the cables arranged in the height direction narrow the distance between the cables in the height direction toward the cable support portion from the cable connection portion. The vehicle seat driving device according to claim 2, wherein the cables arranged in the height direction have a constant distance from each other in the height direction from the cable connection portion to the cable support portion.

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