JP5007147B2 - Seat reclining device with walk-in mechanism - Google Patents

Description

  The present invention relates to a seat reclining device with a walk-in mechanism, which is an improved standing structure of a support shaft that supports a walk-in lever.

  When opening and exiting a second seat in a two-door vehicle of a normal car, or when getting on and off a third seat from a rear door in a one-box vehicle, the seat moves forward when the front seat back is moved forward. Space for movement is secured so that people can easily get on and off the seat. In order to employ such a configuration, there is provided a walk-in device that mechanically issues a command to move the seat forward by detecting that the seat back is moved forward.

As a conventional seat reclining device with a walk-in mechanism, for example, the one described in Patent Document 1 is known. As shown in FIG. 3 of Patent Document 1, an upper arm 43 is provided on the lower arm 36 via a second reclining mechanism 90, and a hollow bush 261 that surrounds a connecting pipe 37 that operates the second reclining mechanism 90 is bracketed. The walk-in lever 273 is rotatably provided on the small diameter portion 263 of the hollow bush 261. The connecting pipe 37 is rotated by the operation lever 281 in FIG. When the mechanism 90 is unlocked and the upper arm 43 is tilted forward, the protrusion 201 fixed to the upper arm 43 rotates to rotate one end of the walk-in lever 273 and is coupled to the other end of the walk-in lever 273. The rod 275 rotates the release lever 279. Then, the lock lever 277 is pushed down, and the upper rail 27 moves forward of the vehicle body.
JP 2004-329577 A

  However, since a hollow bush is provided in a state surrounding the connecting pipe to support the walk-in lever, the occupied space for supporting the walk-in lever is increased, the number of parts is increased, and the cost is increased. . Moreover, it is difficult to share the case where the walk-in device is provided and the case where the walk-in device is not provided.

  Then, this invention aims at providing the seat reclining apparatus with a walk-in mechanism which solved said subject.

  The invention according to claim 1 is provided such that a cushion side arm coupled to the seat cushion and a back side arm coupled to the seat back are rotatably provided, and the back side arm is locked with respect to the cushion side arm. Seat locking means is provided, and an unlocking shaft for unlocking the seat locking means is provided at the center of rotation of the back side arm, and the tip of the unlocking shaft projects from the cushion side arm. A seat lock release lever is provided at the tip of the lock release shaft, and a spiral spring that urges the back side arm toward the forward side with respect to the cushion side arm pushes the tip of the lock release shaft. The inner end of the spiral spring is engaged with the cushion side arm, while the outer end is on the back side. The cushion-side arm is provided with a walk-in lever so as to be rotatable via a support shaft, while an upper rail provided on the seat cushion is movably provided on the lower rail and the upper rail is mounted on the vehicle body. A biasing means for biasing forward is provided, rail lock means for locking the upper rail with respect to the lower rail, and a rail lock release lever for unlocking the rail lock means are provided. A seat reclining device with a walk-in mechanism in which a pressing portion that presses and rotates one end of the walk-in lever when tilted forward is formed on the back arm, and the other end of the walk-in lever is connected to the rail lock release lever The spiral spring in the cushion side arm A spring hanging member is coupled to the inside and outside the tip of the unlocking shaft, and the spring hanging member is coupled to the cushion side arm, and the coupling portion extends along the unlocking shaft. And a shaft holding portion that covers the distal end portion of the unlocking shaft is integrally formed at the distal end of the standing portion. The support shaft is coupled to the holding portion.

  According to this invention, when the seat lock release lever is operated to release the lock of the seat lock means, the back side arm is moved forward by the urging force of the spiral spring, and when the back side arm is moved forward, the pressing portion is moved to the walk-in lever. The rail lock release lever connected to the other end of the walk-in lever releases the lock of the rail lock means, and the upper rail moves toward the front of the vehicle body by the urging means.

  And since the shaft holding part which couple | bonds a support shaft is integrally formed in the front-end | tip of the standing part which engages the inner end part of a spiral spring, the member for engaging the inner end part of a spiral spring and a support shaft There is no need to provide a separate member for connecting the two. In addition, since the support shaft is coupled to the shaft holding portion that covers the distal end portion of the unlocking shaft, the attachment of the support shaft and the walk-in lever can be the last of the assembly work of the seat reclining device.

  The invention according to claim 2 is the seat reclining device with a walk-in mechanism according to claim 1, wherein an insertion hole is formed in the shaft holding portion and a nut member is fixed inside the shaft holding portion, A screw inserted into the insertion hole from the outside of the shaft holding portion is screwed into the nut member to constitute the support shaft.

  According to the present invention, the support shaft can be easily erected on the shaft holding portion simply by fixing the nut member to the inside of the shaft holding portion and screwing the nut member through the shaft holding portion. The walk-in lever can be rotatably supported.

  According to a third aspect of the present invention, in the seat reclining device with a walk-in mechanism according to the first aspect, a screw hole is formed in the shaft holding portion, and a screw is screwed into the screw hole from the inside of the shaft holding portion. The nut is screwed into the screw to constitute the support shaft.

  According to the present invention, a screw hole is formed in the shaft holding portion, a screw is screwed into the screw hole, and a nut member is simply screwed into the screw, whereby the support shaft can be easily erected on the shaft holding portion, The walk-in lever can be rotatably supported.

  According to the seat reclining device with a walk-in mechanism according to claim 1, the shaft holding portion for holding the support shaft is integrally formed at the tip of the standing portion with which the inner end portion of the spiral spring is engaged. There is no need to separately provide a member for engaging the inner end of the spring and a member for holding the support shaft, and the space occupied by the member for holding the support shaft is small, and the number of parts is small and the cost is low. It will be cheap. In addition, the attachment of the support shaft and the walk-in lever can be done at the end of the assembly work of the seat reclining device, so parts can be shared between the case where the support shaft and the walk-in lever are provided or not. The assembly process can be made common.

  According to the seat reclining device with a walk-in mechanism according to claim 2, the nut member is fixed inside the shaft holding portion, and the nut holding member is supported by the shaft holding portion only by screwing the screw through the shaft holding portion. The shaft can be easily erected and the walk-in lever can be rotatably supported.

  According to the seat reclining device with a walk-in mechanism according to claim 3, a screw hole is formed in the shaft holding portion, a screw is screwed into the screw hole, and a nut member is screwed into the screw. Can be easily erected, and the walk-in lever can be rotatably supported.

  Embodiments of a seat reclining device with a walk-in mechanism according to the present invention will be described below.

  FIG. 2 shows the overall configuration of the seat reclining device with a walk-in mechanism, and FIG. 1 shows a perspective view in which some parts are omitted and parts are exploded. A cushion side arm 1 coupled to a seat cushion (not shown) and a back side arm 2 coupled to a seat back (not shown) are rotatably provided, and as shown in FIG. A seat locking means 3 for locking 2 is provided between the cushion side arm 1 and the back side arm 2. An unlocking shaft 4 for unlocking the seat locking means 3 is provided at the pivot center where the back side arm 2 pivots, and a tip end portion of the unlocking shaft 4 projects from the cushion side arm 1. ing. As shown in FIG. 4, the opposite side of the unlocking shaft 4 is connected to the other unlocking shaft 4 via a connecting shaft 4a. A seat lock release lever 5 shown in FIG. 2 is provided at the tip of the lock release shaft 4. The seat lock release lever 5 is formed in a substantially “<” shape and protrudes downward from the rear side of the vehicle body of the cushion side arm 1 so that it can be operated with a foot from the rear seat. Further, a second seat lock release lever 6 is provided on the cushion side arm 1 so as to be rotatable via a rotation shaft 6a so that the lock release shaft 4 can be operated while sitting on the seat. A long hole 7a is formed at the other end of the connecting rod 7 whose one end is coupled to the second sheet lock releasing lever 6 via the rotation shaft 6b. The long hole 7a is provided in the sheet lock releasing lever 5. A pin 5a is inserted.

  A spiral spring 8 that biases the back-side arm 2 in a direction to move the back-side arm 2 forward relative to the cushion-side arm 1 is provided so as to surround the tip of the lock release shaft 4. As shown only in the inner end portion and the outer end portion of the spiral spring 8 in FIG. 1, the inner end portion 8 a of the spiral spring 8 is engaged with an inner spring hook portion 9 f, which will be described later, protruding from the cushion side arm 1. On the other hand, the outer end 8b is engaged with the outer spring hook 13a of the spring hook 13 protruding from the back arm 2.

  A spring hooking member 9 is provided inside the spiral spring 8 in the cushion side arm 1 and outside the tip of the lock release shaft 4. A shaft holding portion that holds a support shaft disposed on a substantially extension line of the lock release shaft 4 is provided at the tip of the spring hook member 9. That is, it is configured as follows. The spring hook member 9 includes a coupling portion 9 a coupled to the cushion side arm 1, and a standing portion 9 b that is erected on the coupling portion 9 a and formed in an arc shape with the lock release shaft 4 as the center. A shaft holding portion 9c is integrally formed at the tip of the standing portion 9b so as to extend in a substantially right angle direction toward the shaft center so as to cover the tip portion of the unlocking shaft 4. A screw 10 serving as a support shaft disposed on a substantially extended line of the release shaft 4 is coupled. An elongated hole 9d is formed in the coupling portion 9a, and the coupling portion 9a is welded to the cushion side arm 1 by utilizing the portion of the elongated hole 9d. And the side surface of the said standing part 9b is notched, and the inner side spring hook part 9f for hooking the inner end part 8a of the spiral spring 8 is formed. The position of the spring hook member 9 in the radial direction of the unlocking shaft 4 is shown in FIG. 3, and the position of the unlocking shaft 4 in the axial direction is shown in FIG.

  The configuration of the screw 10 provided upright on the shaft holding portion 9c will be described below. As shown in FIG. 5, an insertion hole 9e is formed in the shaft holding portion 9c, and the nut member 11 is fixed inside the shaft holding portion 9c, while the screw 10 is formed in the intermediate portion of the walk-in lever 12. The screw 10 is inserted through the insertion hole 12 a, and is inserted into the insertion hole 9 e from the outside of the shaft holding portion 9 c and screwed into the nut member 11. As shown in FIG. 5, the screw 10 includes a screw portion 10a, a large diameter portion 10b having a larger outer diameter than the screw portion 10a, and a head portion 10c, and the length dimension of the large diameter portion 10b. Is set to be slightly larger than the thickness dimension of the walk-in lever 12, so that even if the screw 10 is tightened, the walk-in lever 12 can freely rotate around the large-diameter portion 10b.

  On the other hand, an upper rail (not shown) provided on the seat cushion is movably provided on the lower rail (not shown) and an urging means (not shown) for urging the upper rail toward the front of the vehicle body is provided to lock the upper rail to the lower rail. A rail lock means (not shown) and a rail lock release lever (not shown) for unlocking the rail lock means are provided.

  A pressing portion 13b that presses and rotates one end of the walk-in lever 12 when the back arm 2 is tilted forward is formed on the opposite side of the outer spring hooking portion 13a of the spring hook 13 in the circumferential direction. Has been. As shown in FIG. 1, a connecting hole 12b is formed at the other end of the walk-in lever 12, and one end of the wire 14 is connected to a pin protruding from the connecting hole 12b via a connecting tool 12c shown in FIG. It is connected. The wire 14 is inserted and disposed in the wire harness 14a, and the other end of the wire 14 is connected to the rail lock release lever.

  In addition, a cover (not shown) that covers the walk-in lever 12 and the like is mounted on the cushion side arm 1, and a bracket 15 for mounting the cover is welded and fixed to the outer peripheral side of the spring hook member 9. The bracket 15 is formed with stopper portions 15a and 15b for stopping the rotation of the back side arm 2 at two positions indicated by phantom lines in FIG. 15c is a long hole for mounting the cover.

  Next, the operation of the seat reclining device with a walk-in mechanism will be described.

  To adjust the seat back angle, first, the second seat lock release lever 6 is pulled upward in FIG. Then, the connecting rod 7 moves in the direction of the arrow, the seat lock release lever 5 rotates counterclockwise, and the seat lock means 3 is unlocked. Next, the seat back angle is changed, and then the second seat lock release lever 6 is released. Then, the second seat lock release lever 6 is restored by the biasing force of a spring (not shown) in the seat lock means 3, and the seat lock means 3 is locked again.

  If the hand is released from the seat back when the seat lock means 3 is unlocked, the back side arm 2 is rotated clockwise by the urging force of the spiral spring 8, so that the seat back is rotated in the direction of the arrow. Be ahead of schedule. Then, the pressing portion 13b of the spring hook 13 coupled to the back side arm 2 presses one end of the walk-in lever 12, so that the walk-in lever 12 rotates counterclockwise as indicated by an arrow, The other end of the lever 12 moves to the left. For this reason, the rail lock release lever connected to the other end of the walk-in lever 12 via the wire 14 rotates, the lock of the rail lock means is released, and the upper rail moves toward the front of the vehicle body by the biasing means. .

  The unlocking of the seat lock means 3 can also be performed by stepping on the seat lock release lever 5 from the rear seat. In this case, since the pin 5a provided on the seat lock release lever 5 moves inside the long hole 7a provided at the other end of the connection rod 7, the connection rod 7 and the second sheet lock release lever 6 move. There is no.

  According to the present invention, the shaft holding portion 9c for coupling the screw 10 is integrally formed at the tip of the standing portion 9b that engages the inner end portion 8a of the spiral spring 8, so that the inner end of the spiral spring 8 is There is no need to separately provide a member for engaging the portion 8a and a member for coupling the screw 10. Further, since the screw 10 is coupled to the shaft holding portion 9c that covers the distal end portion of the unlocking shaft 4, the screw 10 and the walk-in lever 12 can be attached at the end of the assembly operation of the seat reclining device. The parts can be shared between the case where the screw 10 and the walk-in lever 12 are provided and the case where the screw is not provided, and the assembly process can be made common.

  According to the present invention, the nut member 11 is fixed inside the shaft holding portion 9c, and the screw 10 having the shaft holding portion 9c penetrated into the nut member 11 is simply screwed into the shaft holding portion 9c. Can be erected.

  In the present embodiment, a screw is used as the support shaft, but a configuration in which no screw is used may be employed. Further, a support shaft is configured by inserting a screw through an insertion hole formed in the shaft holding portion and screwing the screw into a nut member fixed inside the shaft holding portion. A screw may be inserted into the hole from the inside of the shaft holding portion to fix the support shaft to the shaft holding portion, and a nut member may be screwed into the screw to attach the walk-in lever.

The perspective view which shows the seat reclining apparatus with a walk-in mechanism (embodiment). The front view which shows the seat reclining apparatus with a walk-in mechanism (embodiment). The front view (embodiment) which removes and shows a walk-in lever, a screw, and a spiral spring of a seat reclining device with a walk-in mechanism. FIG. 3 is a view taken in the direction of arrow A in FIG. 2 (embodiment). The BB arrow line view of FIG. 2 (embodiment).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cushion side arm 2 ... Back side arm 3 ... Seat lock means 4 ... Lock release shaft 5 ... Seat lock release lever 8 ... Spiral spring 8a ... Inner end part 8b ... Outer end part 9 ... Spring hook member 9a ... Coupling part 9b ... Standing part 9c ... Shaft holding part 9e ... Insertion hole 9f ... Inner spring hooking part 10 ... Screw (support shaft)
DESCRIPTION OF SYMBOLS 11 ... Nut member 12 ... Walk-in lever 13a ... Outer spring hook part 13b ... Pressing part

Claims (3)

A cushion side arm coupled to the seat cushion and a back side arm coupled to the seat back are rotatably provided, and seat locking means for locking the back side arm with respect to the cushion side arm is provided, An unlocking shaft for unlocking the seat locking means is provided at the rotation center where the back side arm rotates, and a tip end portion of the unlocking shaft is provided so as to protrude from the cushion side arm. A seat lock release lever is provided at the front end of the lock release shaft, and a spiral spring is provided surrounding the front end of the lock release shaft for biasing the back side arm forward with respect to the cushion side arm. While the inner end of the spring engages with the cushion side arm, the outer end engages with the back side arm,
A walk-in lever is rotatably provided on the cushion side arm via a support shaft, while an upper rail provided on the seat cushion is movably provided on the lower rail and urges the upper rail toward the front of the vehicle body. A biasing means is provided, rail locking means for locking the upper rail with respect to the lower rail, and a rail lock release lever for unlocking the rail locking means are provided, and when the back side arm is tilted forward, the walk-in lever In a seat reclining device with a walk-in mechanism in which a pressing portion that presses and rotates one end is formed in the back side arm, and the other end of the walk-in lever is connected to the rail lock release lever.
A spring hook member is coupled to the inside of the spiral spring in the cushion side arm and outside the tip end portion of the unlocking shaft, and the spring hook member is coupled to the cushion side arm and the coupling portion. And a standing portion that is formed along the unlocking shaft and is engaged with an inner end portion of the spiral spring, and a shaft that covers a tip portion of the unlocking shaft at a tip of the standing portion A seat reclining device with a walk-in mechanism, wherein a holding portion is integrally formed, and the support shaft is coupled to the shaft holding portion. The seat reclining device with a walk-in mechanism according to claim 1,
An insertion hole is formed in the shaft holding portion and a nut member is fixed inside the shaft holding portion, while a screw inserted into the insertion hole from the outside of the shaft holding portion is screwed into the nut member. A seat reclining device with a walk-in mechanism, which constitutes the support shaft. The seat reclining device with a walk-in mechanism according to claim 1,
A screw hole is formed in the shaft holding portion, a screw is screwed into the screw hole from the inside of the shaft holding portion, and a nut member is screwed into the screw to constitute the support shaft. Seat reclining device with walk-in mechanism.

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