JP2007307182A - Seat reclining device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat reclining device of a vehicle which solves the problem that unlocking is required when raising a seatback upward and a lock tooth gears engages with an internal tooth when the seatback is tilted forward. <P>SOLUTION: When a seatback occupies between an uprising condition and a most inclining backward condition, it can be locked or unlocked. When it occupies between the uprising condition and a folding forward condition, a reclining unit 3 which turns freely, an unlock lever 12 which unlocks a reclining unit 3, a restraint lever 13 which is connected through a long hole 13 and a pin 19 so as to turn to the opposite direction when the unlock lever 12 is turned to an unlocking direction and constrains the unlock lever 12 from turning to a lock direction, and a pressing part 2b which presses the restraint lever 13 when a seatback is tilted forward are provided. When the seatback is tilted forward by unlocking of the unlock lever 12, the unlocking condition of the reclining unit 3 is continued. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a seat reclining device for a vehicle in which a range from a standing state to a forwardly tilted state is a non-locking range in which the seat back is not locked.

  The vehicle seat reclining device is provided with a lock mechanism that fixes the angle formed by the seat back with respect to the seat cushion at an arbitrary value. When changing the angle formed by the seat back, the lock is temporarily released. Manually change the angle of the seat back and then lock again.

  In addition, as with the front seat of a two-door car, the seat back device is moved forward and the seat slide device is unlocked at the same time as the seat back is moved forward so that the passenger can smoothly get on and off the rear seat. Some have adopted a walk-in mechanism in which the front seat moves forward.

  In the vehicle seat reclining device employing such a walk-in mechanism, the seat back is required to rotate at a stroke from the standing state to the forwardly tilted state, so that the seat back is not locked in this rotational range. Non-locking range.

  As a conventional vehicle seat reclining device having a non-locking range, for example, a device disclosed in Patent Document 1 is known. This is provided with a fixed flange and a movable flange relatively rotatably via a holder ring arranged on the outer periphery, and three blocks are arranged every 120 degrees along the circumferential direction inside the fixed flange. The outer teeth formed on the three blocks are pressed radially outward by a cam, and the three blocks are engaged with the inner teeth formed on the inner peripheral surface of the movable flange, whereby the fixed flange and the movable flange are The relative rotation is stopped and locked. In order to form a non-locking range so that the external teeth formed on the three blocks do not partially mesh with the internal teeth formed on the inner peripheral surface of the movable flange, the inner diameter dimension of the unlatching ring provided on the movable flange is Three wide portions each having a small radial size and a large width in the radial direction are formed every 120 degrees.

When the movable flange rotates and the three blocks of the fixed flange correspond to the wide part of the unlatching ring provided on the movable flange, the external teeth formed on the three blocks are formed on the inner peripheral surface of the movable flange. Does not mesh with internal teeth. For this reason, the seat back can be locked in a range from the last tilted state to the standing state of the seat back, and the seat back is not locked until the seat back is raised from the standing state.
Japanese Patent Laid-Open No. 6-125821

  However, since three sets of the 120 degree range composed of the reclining lock range and the non-lock range are arranged along the circumferential direction, the relative rotation angle of the movable flange with respect to the fixed flange is (120 degrees-block). The angle of the length in the circumferential direction) is the limit. For this reason, in the forward-turned position, which is a position rotated nearly 180 degrees from the last tilted state of the seat back, each block is not supposed to be engaged with each other beyond the unlocked range of the movable flange. There is a risk that the teeth will rotate to the position of the internal teeth and mesh. When they are engaged, it is necessary to perform an unlocking operation when raising the seat back, which is troublesome.

  In the case of two sets of blocks, since the blocks are arranged every 180 degrees along the circumferential direction, the relative rotation angle of the movable flange with respect to the fixed flange is (180 degrees-the length of the block in the circumferential direction). The angle) is the limit.

  Then, this invention aims at providing the seat reclining apparatus of the vehicle which solved said subject.

  The invention according to claim 1 locks or locks at an arbitrary angle when the seat back occupies a reclining lock range between the standing state and the last tilted state with respect to the seat cushion constituting the seat. A recliner unit that freely rotates when it occupies a non-locking range between a standing state and a forward-turned state, and an operation shaft for operating the reclining unit from a locked state to an unlocked state. A lock release lever and a support shaft disposed in front of the operation shaft are provided so as to be rotatable. When the lock release lever is rotated in the unlocking direction, the rotation direction of the lock release lever Is connected to the unlock lever via an interlocking mechanism so that it rotates in the opposite direction to the unlock lever. A restraining lever that restrains the restraining lever from rotating, and a pressing portion provided on the seat back to press the restraining lever, and the unlocking lever is operated to unlock the restraining lever. When the seat back is tilted forward while occupying the unlocking position, the restraining lever and the unlocking lever are held at the unlocking position by the pressing portion pressing the restraining lever, and the unlocking of the reclining unit is released. It is characterized by being maintained continuously.

  According to the present invention, when the lock release lever is rotated to the lock release position, the reclining unit is unlocked and the seat back is brought forward. On the other hand, since the unlocking lever is connected to the restraining lever through the interlocking mechanism, the restraining lever rotates about the support shaft in the opposite direction to the unlocking lever, and takes a posture close to a horizontal state. In this state, the pressing portion of the seat back that is tilted forward presses the restraining lever, so the restraining lever is held in the unlocked position, and the unlocking lever that is interlocked with the restraining lever via the interlocking mechanism is also in the unlocked position. Will be retained.

  In other words, when the seat back is moved forward, the lock release lever is held in the unlock position even if the tooth of the lock tooth exceeds the non-lock range where there is no internal tooth and faces the position where the internal tooth exists. The teeth are not pushed radially outward and do not mesh with the inner teeth. Therefore, even when a configuration in which, for example, three sets of 120 degree ranges including a reclining lock range and a non-lock range are arranged along the circumferential direction is adopted, the seat back is locked when the seat back is moved forward. Since the seat back is not locked when the seat back is moved forward, it is possible to cause the seat back as it is without operating the lock release lever.

  According to a second aspect of the present invention, in the vehicle seat reclining device according to the first aspect, the seat slide device that moves the seat in the longitudinal direction of the vehicle body, the locking means that locks the seat slide device, and the seat back is moved forward. Then, there is provided a walk-in lever that releases the lock by the locking means and slides the seat to the foremost position, the walk-in lever is pressed by the pressing portion and rotates, and the walk-in lever moves the restraining lever. The restraining lever is pressed and held in the unlocked position.

  According to this invention, when the seat back is moved forward, the pressing portion of the seat back presses the restraining lever via the walk-in lever. For this reason, when the seat back is moved forward, not only the lock release lever is held in the lock release position but also the locking means of the seat slide device connected to the walk-in lever is released and the seat moves forward of the vehicle body. Easy to get on and off the rear seat from the outside.

  According to the vehicle seat reclining device of the present invention, when the lock release lever is rotated to the lock release position, the seat back is brought forward, and the pressing portion of the forward-turned seat back presses the restraint lever. The restraint lever is held in the unlocked position, and the unlocking lever linked with the restraining lever and the interlocking mechanism is also held in the unlocked position. For example, when the seat back is tilted forward, the tooth of the lock tooth has no internal teeth. Even if it faces the inner teeth of the reclining lock range of another set beyond the non-lock range, the teeth of the lock tooth are not pressed radially outward.

  Therefore, since the seat back is not locked and not locked in a state where the seat back is moved forward, the seat back can be caused without operating the lock release lever.

  In addition, when the seat back is tilted forward, the teeth of the lock tooth are not pressed outward in the radial direction, so there are three reclining units provided with three 120 degree ranges consisting of a reclining lock range and a non-lock range, and two 180 degree ranges. It can be adopted without distinguishing from the reclining unit.

  Embodiments of a vehicle seat reclining device according to the present invention will be described below.

  A vehicle seat includes a seat cushion and a seat back, and the seat back is provided so as to be rotatable with respect to the seat cushion. As shown in FIG. 1, a back side arm 2 to which a seat back (not shown) is coupled is rotatably provided on a cushion side arm 1 to which a seat cushion (not shown) is coupled. A reclining unit 3 is provided between the cushion side arm 1 and the back side arm 2 in the axial direction, and a mechanism for unlocking the reclining unit 3 is provided on the side of the back side arm 2. . A spring (not shown) that urges the back side arm 2 forward and backward with respect to the cushion side arm 1 is provided.

  The reclining unit 3 can be locked or unlocked at any angle when the seat back occupies a reclining lock range between the standing state and the last tilted state, and has a non-locking range between the standing state and the forward tilted state. When occupying it, it is designed to rotate freely.

  The structure of the reclining unit 3 will be briefly described with reference to FIGS. The machine frame 4 and the lid 5 are held via a holder ring 6 so as to be relatively rotatable. A pair of lock teeth 7, 7 that are rotatable about a shaft portion 4 a that is integrally formed with the machine frame 4 is provided. The inner teeth 5a and 5b are engaged with each other. The engagement portion 9a having a substantially square cross section of the operation shaft 9 is loosely fitted in the engagement hole 10a of the cam 10. When the cam 10 is rotated counterclockwise via the operation shaft 9, the lock teeth 7, 7 rotates clockwise around the shaft 4 a, the external teeth 7 a and 7 b mesh with the internal teeth 5 a and 5 b, and the lid 5 is locked to the machine frame 4. On the other hand, when the cam 10 is rotated in the clockwise direction, the mesh is disengaged, so that the lid 5 is freely rotated with respect to the machine frame 4. Since the spring 8 that biases the cam 10 is provided, the locked state is maintained when no external force is applied.

  When the lock teeth 7, 7 occupy the reclining lock range facing the inner teeth 5 a, 5 b, the lid 5 can be locked or unlocked at an arbitrary angle with respect to the machine frame 4, and the lock teeth 7, 7 become the inner teeth 5 a , 5b occupies the non-locking range facing the portion where the internal teeth do not exist, the lid 5 rotates freely with respect to the machine frame 4.

  In order to couple the machine frame 4 to the cushion side arm 1, a plurality of fitting holes 1a are formed around the axis of the cushion side arm 1 as shown in FIGS. A plurality of convex portions 4a are formed, and the convex portions 4a are fitted into the fitting holes 1a. Further, in order to couple the lid 5 to the back side arm 2, a plurality of fitting holes 2 a are formed around the axis of the back side arm 2, while a plurality of convex portions 5 a are formed on the lid 5. The convex portion 5a is fitted in the fitting hole 2a.

  The unlocking lever 12 for unlocking the reclining unit 3 from the locked state by the urging force of the spring 8 and the rotation of the unlocking lever 12 when the unlocking lever 12 is rotated in the unlocking direction. When the seat back is tilted forward, the lock by the locking means of the seat slide device is released when the seat back is tilted forward so as to rotate in the direction opposite to the moving direction. A walk-in lever 14 that slides the seat to the foremost position is provided.

  The walk-in lever 14 is provided as follows. As shown in FIG. 4, a flange portion 9b is formed on the distal end side of the engaging portion 9a of the operation shaft 9, and the main collar 15 is inserted further on the distal end side than the flange portion 9b. The arm 1 is welded. An auxiliary collar 16 is rotatably inserted into the small diameter portion 15a of the main collar 15. The auxiliary collar 16 is welded to the walk-in lever 14 fitted into the small-diameter portion 16a of the auxiliary collar 16, and a push nut 17 that restrains the walk-in lever 14 and the auxiliary collar 16 from moving in the axial direction. It is attached to the operation shaft 9. The push nut 17 is also provided inside the lid body 5.

  A small diameter portion 9c is formed on the outer side of the push nut 17 in the axial direction, and the lock release lever 12 is coupled to the small diameter portion 9c. As shown in FIG. 1, a hole 12a is formed at a position offset with respect to the length direction of the lock release lever 12, the hole 12a is inserted into the small diameter portion 9c, and the small diameter portion 9c and the lock release lever 12 are connected to each other. Welded together.

  As shown in FIG. 1, a support shaft 18 is provided in a state of projecting from the cushion side arm 1 obliquely below the operation shaft 9 in front of the vehicle body. The restraining lever 13 is formed in a substantially square shape, and a hole 13a is formed in the middle portion. And the small diameter part 18a of the support shaft 18 is rotatably inserted in the hole 13a. The restraining lever 13 is connected to the lock release lever 12 through an interlocking mechanism. That is, the restraining lever 13 is formed with a long hole 13b along a straight line passing through the hole 13a, while the unlocking lever 12 is stepped substantially in parallel with the unlocking lever 12 from the position of the hole 12a. An arm portion 12b extending in a state is provided, a hole 12c is formed at the tip of the arm portion 12b, and a headed pin 19 is press-fitted into the hole 12c. The tip of the headed pin 19 is loosely fitted in the long hole 13b. Thereby, when the lock release lever 12 is rotated in the unlocking direction (clockwise), the restraining lever 13 is rotated counterclockwise opposite to the rotation direction of the lock release lever 12.

  A hole 14b is formed in the vicinity of one end of the walk-in lever 14, and a headed pin 23 is press-fitted into the hole 14b. The headed pin 23 pushes the restraining lever 13 by the headed pin 23 of the walk-in lever 14 when a later-described pressing portion 2b of the back side arm 2 presses the walk-in lever 14 when the seat back is moved forward. Thus, the restraining lever 13 is provided to hold it in the unlocked position.

  In addition, in order to press the walk-in lever 14, a pressing portion 2b is provided on the back side arm 2 constituting the seat back. The pressing portion 2b is formed in an L shape and is coupled to the outer surface of the back side arm 2 via two rivets 2c. When the seat back is moved forward, the pressing portion 2b rotates together with the back side arm 2 and presses the vicinity of the headed pin 23 at one end of the walk-in lever 14 in the counterclockwise direction.

    The walk-in lever 14 is connected to locking means of the seat slide device. The seat is provided with a seat slide device for moving the seat in the longitudinal direction of the vehicle body, and is provided with a locking means for locking the seat slide device. In order to release the lock by the locking means, a pin 14a is formed to protrude at the other end of the walk-in lever 14, while a cable 21 is inserted into the outer tube 20 and a metal fitting 22 coupled to one end of the cable 21 is provided. The pin 14a is inserted. The other end of the cable 21 is coupled to locking means (not shown).

  In addition, a pin 13c protrudes from one end of the restraining lever 13, while a metal fitting 26 is coupled to one end of a cable 25 inserted through the outer tube 24, and the metal fitting 26 is inserted through the pin 13c. The other end of the cable 25 is coupled to one end of a restraining lever 13 (not shown) on the opposite side of the sheet.

  In order to fix the end portions of the outer tubes 20 and 24 to the cushion side arm 1, a support fitting 27 is coupled to the cushion side arm 1, and grooves 27 a and 27 b are formed in the support fitting 27. The grooves 27a and 27b are fitted with the groove portions of the tube ends 20a and 24a provided at the ends of the outer tubes 20 and 24, respectively.

  When the seat back is tilted forward in a state where the unlocking lever 12 is unlocked and the restraining lever 13 occupies the unlocking position, the pressing portion 2b pushes the restraining lever 13 via the walk-in lever 14, thereby restraining the lever. 13 and the unlock lever 12 are held at the unlock position, and the unlocking state of the reclining unit 3 is continuously maintained.

  Next, the operation of the vehicle seat reclining device will be described with reference to FIG.

  When the lock release lever 12 is rotated clockwise toward the unlock position as shown in FIG. 2B from the state where the back side arm 2 of the seat back is substantially upright as shown in FIG. 3 (b), since the cam 10 rotates clockwise and the pair of lock teeth 7 rotate counterclockwise, the external teeth 7a and 7b of the lock tooth 7 are separated from the internal teeth 5a and 5b of the lid 5, Since the reclining unit 3 is unlocked, the seat back is brought forward by an urging force of a spring (not shown). On the other hand, since the unlocking lever 12 is connected to the restraining lever 13 via the pin 19 and the long hole 13b, the restraining lever 13 is counterclockwise about the support shaft 18 and opposite to the unlocking lever 12. It rotates and becomes a posture close to a horizontal state as shown in FIG. In this state, the pressing portion 2b of the back-side arm 2 in the seat back that has been tilted presses one end of the walk-in lever 14, and the headed pin that protrudes from the walk-in lever 14 as shown in FIG. 23 presses the restraining lever 13 downward. As a result, the unlocking lever 12 is slightly rotated in the unlocking direction from FIG. 2C to become as shown in FIG. 2D, and the restraining lever 13 is held in the unlocking position. Since the unlocking lever 12 is interlocked with the restraining lever 13 via the pin 19 and the long hole 13b, the unlocking lever 12 that tries to turn toward the lock position by the biasing force of the spring 8 is restrained by the restraining lever 13. Held in the unlocked position.

  In FIG. 3, FIG. 3B is an explanatory diagram of the operation of the reclining unit 3 in which the seat back is substantially upright, and the lid 5 rotates with respect to the machine frame 4. If the position of the back side arm 2 that rotates integrally with the lid 5 and the position of the seat back in the circumferential direction is at the position of the SB display at the end of the inner tooth 7 a in the lid 5, the seat indicated as SB As shown in FIG. 3 (a), the back position is a position rotated 90 degrees clockwise in the final tilted state, and is rotated 90 degrees counterclockwise in the forward-tilted state as shown in FIG. 3 (c). It becomes the position.

  The outer teeth 7a of the lock tooth 7 mesh with each other on the left side of the "A" range where the inner teeth 5a are formed as shown by "a" in FIG. 3A, and the inner teeth 5a are formed in FIG. 3B. 3 (c), it is engaged with the left side of the "B" range where the internal teeth 5b are formed outside the "A" range where the internal teeth 5a are formed. It will be. Even in the configuration where the gears mesh with each other in the “B” range as shown in FIG. 3C, in the present invention, the lock release lever 12 is held in the lock release position when the seat back is tilted forward as described above. In the state where the unlocked state is continuously maintained and the seat back is moved forward, the seat back can be freely rotated without being locked.

  In other words, when the seat back is moved forward, the lock release lever 12 is held at the lock release position even if, for example, the external teeth 7a of the lock tooth 7 face the position where the internal teeth exist beyond the non-lock range without the internal teeth. Therefore, the outer teeth 7a of the lock tooth 7 are not pressed outward in the radial direction, and the outer teeth 7a do not mesh with the inner teeth 5a. Therefore, when the configuration in which two sets of the 180 degree range portion including the reclining lock range and the non-lock range are arranged along the circumferential direction as in the present embodiment, or the 120 degree range portion is a circle. Even in the case of adopting a configuration in which three sets are arranged along the circumferential direction, in a state in which the seat back is tilted forward (the seat back is present at a position that is approximately 180 degrees with the case where the seat back is in the last tilted state). The seat back is never locked. Therefore, it is possible to cause the seat back without operating the lock release lever 12 in the unlocking direction from the state where the seat back is moved forward.

  Further, when the seat back is moved forward, not only the lock release lever 12 is held at the lock release position but also the walk-in lever 14 rotates to pull the cable 21, so that the locking means of the seat slide device is locked. The seat is released and the seat is moved forward by the urging force of a spring (not shown). For this reason, it is easy to get on and off the rear seat from the outside of the vehicle.

  In the present embodiment, when the seat back is moved forward, the configuration in which the pressing portion of the seat back presses the restraining lever via the walk-in lever to hold the restraining lever in the unlocked position is adopted. A configuration in which the pressing portion of the seat back directly presses the restraining lever without interposing the walk-in lever may be adopted.

The perspective view which shows the principal part of the seat reclining apparatus of a vehicle (embodiment). Action | operation explanatory drawing of the vehicle seat reclining apparatus (embodiment). Action | operation explanatory drawing (embodiment) of a reclining unit. Sectional drawing of a reclining unit (embodiment).

Explanation of symbols

1. Cushion arm (seat cushion)
2 ... Back arm (seat back)
2b ... Pressing part 3 ... Recliner unit 12 ... Lock release lever 13 ... Restraining lever 13b ... Long hole (interlocking mechanism)
14 ... walk-in lever 18 ... support shaft 19 ... headed pin (interlocking mechanism)

Claims (2)

When the seat back occupies a reclining lock range between the standing state and the last tilted state with respect to the seat cushion constituting the seat, the seat back can be locked or unlocked at an arbitrary angle, and the standing state and the forward tilted state A reclining unit that rotates freely when it occupies a non-locking range between
An unlocking lever for operating an operation shaft for operating the reclining unit from a locked state to an unlocked state;
It is provided so as to be rotatable about a support shaft arranged in front of the operation shaft, and in a direction opposite to the rotation direction of the unlocking lever when the unlocking lever is rotated in the unlocking direction. A constraining lever that is connected to the unlocking lever via a interlocking mechanism so as to rotate and restrains the unlocking lever from rotating in the locking direction;
A pressing portion provided on the seat back for pressing the restraining lever,
When the seat back is tilted forward while the lock release lever is unlocked and the lock lever occupies the lock release position, the pressing portion presses the lock lever so that the lock lever and the lock release lever are A seat reclining device for a vehicle, wherein the seat reclining device is held in an unlocked position and the unlocking of the reclining unit is continuously maintained. The vehicle seat reclining device according to claim 1,
A seat slide device for moving the seat in the longitudinal direction of the vehicle body, a lock means for locking the seat slide device, and a walk-in lever for releasing the lock by the lock means and sliding the seat to the foremost position when the seat back is tilted forward And
The walk-in lever is rotated by being pressed by the pressing portion, and the walk-in lever presses the restraining lever to hold the restraining lever in the unlocked position. apparatus.

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