JP5402536B2 - Reclining device for vehicle seat - Google Patents

Description

  The present invention relates to a reclining device for a vehicle seat. More specifically, the present invention relates to a vehicle seat reclining device for fixing a backrest angle of a seat back with respect to a vehicle body.

  Conventionally, as a reclining device for a vehicle seat, for example, one disclosed in Patent Document 1 below is known. That is, a slide device having a function capable of sliding lock is provided on the vehicle main body, and the backrest angle of the seat back is fixed by engaging the lock device provided on the seat back with the slide device. It is something like that.

  Specifically, the slide device is provided with a striker composed of a U-shaped frame that is hooked to the above-described lock device, and the hook of the lock device is hooked and locked on one leg of the striker. It has become. By the way, the above-described slide device is configured to slide linearly in the vehicle front-rear direction, and the seat back is configured to tilt around a lower end portion serving as a hinge connection point with the seat cushion. Yes.

  As described above, the slide device and the seat back are moved in different ways, so that the striker movement locus (straight line) and the lock device movement locus (arc) do not match each other. ing. Therefore, in order to absorb the shift amount due to the difference between the movement trajectories of the two, the striker is configured to be able to swing in the height direction with respect to the slide device.

JP 2008-94227 A

  However, in the prior art disclosed above, the striker provided on the slide device so as to be capable of swinging has an unstable configuration in which the slide device is elastically supported by a spring force. This may cause problems such as rattling of the seat back engaged with the striker.

  The present invention has been devised as a solution to the above-described problem, and the problem to be solved by the present invention is to prevent the striker from engaging with the seat back provided in the slide device. Is to make it.

In order to solve the above problems, the vehicle seat reclining device of the present invention takes the following means.
A first aspect of the present invention is a vehicle seat reclining device for fixing a backrest angle of a seat back with respect to a vehicle body. The vehicle seat reclining device includes an engagement device provided on a seat back and a slide device provided on a vehicle main body so as to be engageable with the engagement device. The seat back is configured such that the backrest angle with respect to the vehicle main body is fixed by engaging the engagement device with a striker provided in the slide device. The striker is provided on the movable rail that constitutes the slide device, and is configured to change the backrest angle by tilting the seat back by sliding in the vehicle front-rear direction with respect to the stationary rail together with the movable rail. Yes. The slide device is provided with a conversion mechanism that changes the height position of the striker according to the movement of the movable rail relative to the fixed rail and holds the striker in a fixed position by contact. ing. The change in the height position of the striker by this conversion mechanism absorbs the amount of shift in the height direction between the striker and the engagement device due to the difference between the movement locus of the slide device and the movement locus of the seat back. It has become.

  According to the first aspect of the present invention, the striker changes the height position in accordance with the movement of the movable rail relative to the fixed rail by the conversion mechanism provided in the slide device. Due to the change in the height position of the striker, the shift amount in the height direction between the striker and the engagement device due to the difference between the movement locus of the slide device and the movement locus of the seat back is absorbed. Then, the striker whose height position has been changed is held in a state of being fixed at the height position by contact. Therefore, the backlash of the striker can be suppressed.

  Next, according to a second aspect of the present invention, in the first aspect described above, the conversion mechanism is configured so that the fixed side rail of the striker is engaged by the engagement of the engaging portion provided on the striker and the guide portion provided on the fixed side rail. It is the structure hold | maintained in the state which fixed the height position with respect to. The guide portion extends in a long shape in the sliding direction of the movable rail, and has a shape that slides and guides the engaging portion so that the height position at which the engaging portion is engaged changes for each slide position. The height position of the striker is changed.

  According to the second aspect, the striker is held in a state in which the height position is fixed with respect to the fixed side rail by the engagement between the engaging portion and the guide portion of the fixed side rail. The guide portion slides the engaging portion so that the height position at which the engaging portion is engaged changes as the movable rail slides, and changes the height position of the striker. Thus, the conversion mechanism can be realized with a relatively simple configuration in which the engaging portion is slid along the shape of the guide portion provided on the fixed-side rail.

  Next, according to the third invention, in the first or second invention described above, the engaging portion provided on the striker can rotate integrally with the striker relative to the movable rail. It is provided with shaft connection. The guide portion provided on the fixed-side rail is formed as a long concave groove that receives a partial shape of the engaging portion and holds the rotational posture of the engaging portion and the striker.

  According to the third aspect of the present invention, the engaging portion provided integrally with the striker is configured to enter and engage in the recessed groove formed in the stationary rail, thereby increasing the height of the striker. The position can be more reliably fixed to the fixed side rail. In addition, since the engaging portion is rotatably supported by the movable rail and a part of the engaging portion enters the recessed groove of the fixed rail, the engaging portion is positioned at the height position of the recessed groove. The height of the striker can be smoothly changed by smoothly rotating and moving in accordance with the change.

1 is a side view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is the side view showing the state where the backrest angle of the seat back was fixed. It is a front view of a slide device. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is a schematic diagram showing the relationship between the movement of an engaging pin and a striker.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the vehicle seat reclining device according to the first embodiment will be described with reference to FIGS. As shown in FIGS. 1 to 2, the vehicle seat reclining device of this embodiment includes a seat back 2 of a vehicle seat 1 constituting a vehicle seat, and a vehicle body side wall Bo (vehicle body) adjacent to the seat back 2. And a mechanism for fixing the backrest angle of the seat back 2 to the vehicle body side wall Bo.

  Here, the vehicle seat 1 described above is configured as a seat for a seat disposed on the right side of the vehicle, which is behind the driver seat, and a locking device 10 provided on the right side of the seat back 2. However, by engaging with the slide device 20 provided on the vehicle body side wall Bo adjacent to the right side portion of the seat back 2, the backrest angle of the seat back 2 is fixed to the vehicle body side wall Bo. Are to be held.

  Here, the above-described slide device 20 is configured such that the striker 22D, which is an engaging portion with the above-described lock device 10, can be slid in the front-rear direction or slide-locked. By engaging the locking device 10 of the seat back 2 described above with 22D, the backrest angle of the seat back 2 can be held in a fixed state with respect to the vehicle body side wall Bo.

  Then, the slide device 20 slides the striker 22D toward the front or rear side of the vehicle in a state where the lock device 10 is engaged with the striker 22D described above, thereby moving the seat back 2 toward the direction in which the seatback 2 is slid. The backrest angle can be changed by tilting. Then, the slide device 20 can be fixed at the backrest angle position where the seat back 2 is tilted by setting the slide device 20 in the slide-locked state again at the position where the striker 22D is moved.

  Hereinafter, the configuration of the slide device 20 described above will be described in detail together with the configuration of the vehicle seat 1. First, the configuration of the vehicle seat 1 will be described. The vehicle seat 1 includes a seat back 2 that serves as a backrest for a seated occupant and a seat cushion 3 that serves as a seating portion. The seat cushion 3 is fixedly provided on a vehicle floor (not shown), and the lower portion of the seat back 2 is hingedly connected to the rear portion of the seat cushion 3 by a connecting shaft R.

  Thereby, the seat back 2 is in a state in which the seat back 2 can be tilted and rotated in the vehicle front-rear direction with respect to the seat cushion 3 around the hinge connecting point by the connecting shaft R described above. A lock device 10 having a structure that can be engaged with the striker 22D of the slide device 20 is provided on the side portion of the seat back 2 adjacent to the side wall Bo of the vehicle body. As shown in FIG. 2, in the locking device 10, the hook 11 provided in the seat back 2 is rotated by being pushed into the striker 22D by the rearward tilt of the seat back 2, and the hook 11 is moved to the striker 22D by this rotation. It is configured to be locked by being turned and engaged.

  With the locking of the locking device 10, the seat back 2 can move following the slide operation of the striker 22D. Here, the slide device 20 is configured to slide the striker 22D obliquely straightly downward in the vehicle longitudinal direction. On the other hand, as described above, the seat back 2 is configured to tilt around the connection point (connection axis R) with the seat cushion 3, and the striker 22D is moved to the movable side due to the difference in the movement mode between the two. The movement trajectory Tr1 (straight line) and the movement trajectory Tr2 (circular arc) of the locking device 10 when it is assumed that the head does not swing with respect to the rail 22 are configured so as not to match each other.

  Therefore, in order to absorb the shift amount due to the difference between the movement loci of the two, the striker 22D can swing with respect to the slide device 20 in the direction of absorbing the shift amount. It is configured. The configuration of the swing motion of the striker 22D will be described in detail later. By the way, the locking device 10 described above is released from the engagement state with respect to the striker 22D by an operation of pulling the strap 2A provided at the shoulder opening of the seat back 2.

  Specifically, when the strap 2A is pulled, the cable 12 connected to the strap 2A is pulled, and by pulling the cable 12, a mechanism portion (not shown) that holds the hook 11 in a locked state is obtained. By being operated, the hook 11 is released from the engaged state with the striker 22D. Next, the configuration of the slide device 20 will be described. As shown in FIGS. 3 to 4, the slide device 20 includes a fixed side rail 21, a movable side rail 22, and a slide lock mechanism 23.

  The fixed-side rail 21 is formed in a long plate shape, and its plate surface is directed toward the inside of the vehicle on which the vehicle seat 1 is arranged so that the longitudinal direction of the long plate is lowered rearward in the vehicle front-rear direction. It is fixed and provided on the vehicle body side wall Bo in an obliquely directed state. The fixed-side rail 21 is bent so that the entire region in the longitudinal direction of the upper edge portion 21A and the entire region in the longitudinal direction of the lower edge portion 21B are stepped up toward the vehicle inner side with respect to the central plate portion 21C. It is formed in the shape.

  Further, a plurality of lock holes 21C1 penetrating in the plate thickness direction are formed in the plate-like central plate portion 21C of the fixed rail 21 at equal intervals in the longitudinal direction at positions close to the upper edge side. These lock holes 21C1 have a function of inserting a claw portion 23A1 of a lock member 23A of a slide lock mechanism 23 described later. As shown in FIG. 4, a guide groove 21 </ b> C <b> 2 that is recessed toward the vehicle outer side (the right side in the figure) is formed in the central plate portion 21 </ b> C of the fixed side rail 21. Here, the guide groove 21C2 corresponds to the guide portion of the present invention.

  The guide groove 21C2 is formed to extend in an arc shape in the longitudinal direction of the fixed side rail 21, and an engaging pin 22F2 provided integrally with a striker 22D provided on the movable side rail 22 to be described later is provided in the groove. This is a functional part that is received inside and guides the engagement pin 22F2 along the groove shape as the striker 22D slides. Here, the engagement pin 22F2 corresponds to a part of the shape of the engagement portion of the present invention. On the inner peripheral portion of the guide groove 21C2, a resin backpacking material 21C3 is provided so as to be integrally attached so that the engagement pin 22F2 received in the groove is sandwiched so as not to rattle. ing.

  Next, the configuration of the movable rail 22 will be described. The movable rail 22 is formed of a long plate that is shorter than the fixed rail 21 described above. The movable side rail 22 is in a state of being guided so as to be movable in the longitudinal direction along the shape of the fixed side rail 21 with the plate surfaces facing each other with respect to the fixed side rail 21. It is assembled. Specifically, on the upper edge portion and the lower edge portion of the movable side rail 22, the upper hook portions bent back in a hook shape on the side in the direction facing the fixed rail 21, respectively, in the entire area in the longitudinal direction. 22A and the lower hanging part 22B are formed respectively.

  As shown in FIG. 4, the movable rail 22 described above is configured such that the upper hanging portion 22 </ b> A and the lower hanging portion 22 </ b> B are hung on the upper edge portion 21 </ b> A and the lower edge portion 21 </ b> B, respectively. By being inserted into the fixed side rail 21 from one end side in the longitudinal direction, the fixed side rail 21 is assembled. Thereby, the movable side rail 22 has the upper edge portion 21A and the lower edge portion 21B in the plate thickness direction between the fixed side rail 21 and the main body portion 22C by the upper hook portion 22A and the lower hook portion 22B. As a state of being sandwiched with a slight gap, it is in a state where it is guided and movably guided in the longitudinal direction with respect to the fixed rail 21.

  Returning to FIG. 2, a single lock hole 22 </ b> C <b> 1 communicating in the thickness direction is formed through the main body portion 22 </ b> C of the movable rail 22 and the mounting plate 22 </ b> E described later. The lock hole 22C1 functions to insert a claw portion 23A1 of a lock member 23A of a slide lock mechanism 23 described later. The main body portion 22C is mounted with a striker 22D formed of a U-shaped frame material so as to protrude from the plate surface on the vehicle inner side of the main body portion 22C and rotatably connected to the shaft. Yes.

  Specifically, the striker 22D is provided by being integrally mounted on a rotating member 22F that is rotatably connected to a mounting plate 22E that is integrally coupled to the main body 22C. Here, the rotating member 22F corresponds to the engaging portion of the present invention. The rotating member 22F is rotatably connected to a fixed piece 22E1 formed by cutting and raising from the mounting plate 22E by a support shaft 22F1. The rotating member 22F has a round bar-like engagement protruding so as to enter the guide groove 21C2 of the fixed rail 21 through the vertically long through hole 22C2 formed in communication with the mounting plate 22E and the main body 22C. A mating pin 22F2 is mounted integrally.

  Accordingly, the striker 22D is configured to swing up and down around the support shaft 22F1 as the engagement pin 22F2 swings up and down along the shape of the guide groove 21C2 of the stationary rail 21. ing. The striker 22D described above is mounted on the rotating member 22F with the U-shaped legs serving as both legs aligned in the slide movement direction of the movable rail 22 in the front-rear direction. Accordingly, as shown in FIG. 1, the striker 22D is configured such that the engagement piece 22D1 forming the front leg of the seat back 2 is pressed against the lock device 10 by the rearward inclination of the seat back 2, and the striker 22D is brought into contact with the engagement piece 22D1. The hook 11 of the locking device 10 is turned and locked.

  Next, the slide lock mechanism 23 has a function of slidingly locking the movable rail 22 with respect to the fixed rail 21 described above. Specifically, the slide lock mechanism 23 includes a lock member 23A serving as a lock component, a support shaft 23B that pivotally supports the lock member 23A with respect to the movable rail 22, and an operation of sliding lock the lock member 23A. The winding spring 23C is biased in the direction, and the cable 23D is operated in a direction to release the lock member 23A from the slide lock state.

  As shown in FIG. 4, the lock member 23 </ b> A is formed of a plate material, is arranged on the vehicle inner side of the main body portion 22 </ b> C of the movable rail 22, and is cut and raised from the mounting plate 22 </ b> E described above by the support shaft 23 </ b> B. The fixed piece 22E2 is rotatably connected to a shaft. Here, the support shaft 23B is provided integrally coupled to the mounting plate 22E in a state in which the axial direction thereof is directed to the sliding movement direction of the movable rail 22, and the shaft 23B is rotatable about the lock member 23A. It is a supported structure. As a result, the lock member 23A has a projecting claw portion 23A1 formed on the upper end portion thereof by a rotational movement about the support shaft 23B, and the lock hole 22C1 formed on the movable rail 22 and the fixed rail 21. The claw portion 23A1 is operated so as to be inserted into the lock hole 21C1 formed in the above-described shape or to be removed from the lock holes 22C1 and 21C1.

  Between the lock member 23A and the mounting plate 22E, the lock member 23A is inserted in the slide lock operating direction (counterclockwise direction in FIG. 4) for inserting the claw 23A1 into the lock holes 22C1 and 21C1. An urging winding spring 23C is hooked. The winding spring 23C is provided by being wound around the outer periphery of the above-described support shaft 23B, one end of which is hooked and fixed to the support shaft 23B, and the other end is hooked to the lower end of the lock member 23A. Has been.

  As a result, the lock member 23 </ b> A is always in a state where the claw 23 </ b> A <b> 1 enters the lock hole 22 </ b> C <b> 1 of the movable rail 22 by urging, and the lock hole 22 </ b> C <b> 1 of the movable rail 22 and the lock hole 21 </ b> C <b> 1 of the fixed rail 21. Is not held, the claw portion 23A1 is held in a state of being pressed against the plate surface of the central plate portion 21C of the fixed side rail 21, and the lock holes 22C1 and 21C1 are matched by sliding of the movable side rail 22. Thus, the claw portion 23A1 is also moved into the lock hole 21C1 of the fixed rail 21 by urging.

  In this way, the claw portion 23A1 of the lock member 23A penetrates into and enters the lock holes 22C1 and 21C1, so that the movable rail 22 is slid and locked with respect to the fixed rail 21. Become. In this slide lock state, the cable 23D connected to the lower end of the lock member 23A is pulled, and the lock member 23A rotates in the clockwise direction in FIG. It is released by being removed from the lock hole 21C1. Here, as shown in FIG. 1, the cable 23D is connected to a release lever M provided on the vehicle body side wall Bo, and is pulled by an operation of lifting the release lever M.

  By the way, as shown in FIG. 2, the striker 22 </ b> D described above is configured such that the movable rail 22 slides with respect to the fixed rail 21 in a state where the striker 22 </ b> D is engaged with the locking device 10 of the seat back 2. Thus, the displacement amount (Di: see FIG. 5) due to the difference between the movement locus (Tr1: see FIG. 5) of the movable rail 22 and the movement locus (Tr2: see FIG. 5) of the locking device 10 should be absorbed. The head swings so as to match the movement trajectory Tr2 of the lock device 10, and the specific configuration thereof is as follows.

  That is, as shown in FIGS. 3 to 4, in the striker 22 </ b> D, the engagement pin 22 </ b> F <b> 2 slides along the shape of the guide groove 21 </ b> C <b> 2 of the fixed side rail 21 due to the slide of the movable rail 22. By changing in the height direction and changing the height position of the engaging pin 22F2, the head is swung downward or swung upward according to this. Here, as shown in FIGS. 3 and 5, the guide groove 21 </ b> C <b> 2 is formed by bending an arc drawn around the connecting axis R, which is the rotation center of the seat back 2, into a circular arc shape that is repeated in the radial direction. Has been.

  As a result, the striker 22D (engagement piece 22D1) is moved by the seesaw movement around the support shaft 22F1 along with the movement (movement trajectory Tr3) of the engagement pin 22F2 sliding along the shape of the guide groove 21C2. The arc shape of the guide groove 21C2 described above is repeated in the radial direction, that is, the arc shape centering on the connecting axis R, which is the rotation center of the seat back 2, in the same manner as the locking device 10. The movement locus Tr2 is drawn. Thereby, the height direction between the striker 22D (engagement piece 22D1) and the locking device 10 due to the difference between the linear movement locus Tr1 of the slide device 20 and the movement locus Tr2 of the seat back 2 (locking device 10). The shift amount (shift Di) is absorbed.

  In addition, the striker 22D always has an engagement pin 22F2 sandwiched by a plastic backlash 21C3 in the guide groove 21C2 of the fixed rail 21 in any height position, regardless of the slide position of the movable rail 22. By being supported so as not to rattle, the height position is fixed and held so as not to rattle. Further, the movement of changing the height position of the striker 22D described above is such that the striker 22D is rotatably supported on the movable rail 22 by the rotating member 22F, and the engaging pin 22F2 provided on the rotating member 22F is fixed to the fixed rail. Since the height position can be changed by rotation like the movement of the seesaw by the movement that swings in the height direction along the shape of the 21 guide grooves 21C2, the movement in the height direction is smooth. Can be done.

  As mentioned above, although embodiment of this invention was described using one Example, this invention can be implemented with various forms other than the said Example. For example, in the above-described embodiment, the engaging pin 22F2 provided on the rotating member 22F that rotates together with the striker 22D enters the guide groove 21C2 formed in the fixed rail 21 and the height position thereof is clamped. The striker 22D is configured to be held in a fixed height position, but instead of the guide groove 21C2, a guide rail that protrudes in a curved shape is formed on the fixed side rail 21 and rotated. The member 22F may be configured to be engaged with the guide rail so that the member 22F can slide along the shape of the guide rail.

  That is, the height position of the striker 22 </ b> D with respect to the stationary rail 21 can be held in a fixed state by engagement between the engaging portion provided on the striker 22 </ b> D and the guide portion provided on the stationary rail 21. Any shape can be used. Moreover, although the striker 22D illustrated the configuration in which the height position is changed by rotating (swinging) in accordance with the movement of the engaging pin 22F2 that slides in the guide groove 21C2, the guide is not provided as a rotating structure. It may be configured to change the height position by moving straight up and down according to the guidance of the part.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2A Strap 3 Seat cushion R Connecting shaft 10 Locking device 11 Hook 12 Cable 20 Slide device 21 Fixed side rail 21A Upper edge portion 21B Lower edge portion 21C Central plate portion 21C1 Lock hole 21C2 Guide groove (guide portion)
21C3 Backlash 22 Movable rail 22A Upper hook 22B Lower hook 22C Main body 22C1 Lock hole 22C2 Through hole 22D Striker 22D1 Engagement piece 22E Mounting plate 22E1 Fixed piece 22E2 Fixed piece 22F Rotating member (engagement part)
22F1 support shaft 22F2 engagement pin (part of the shape of the engagement portion)
23 Slide lock mechanism 23A Lock member 23A1 Claw portion 23B Support shaft 23C Winding spring 23D Cable Bo Car body side wall (vehicle body)
M Release lever Tr1 Movement locus Tr2 Movement locus Tr3 Movement locus Di Misalignment

Claims (3)

A reclining device for a vehicle seat for fixing a backrest angle with respect to a vehicle body of a seat back,
An engagement device provided on the seat back;
A slide device provided on the vehicle main body so as to be engageable with the engagement device,
The seat back is configured such that a backrest angle with respect to the vehicle body is fixed by engaging the engagement device with a striker provided in the slide device, and the striker is movable to constitute the slide device. It is configured to change the backrest angle by tilting the seat back by sliding in the vehicle front-rear direction with respect to the fixed rail together with the movable rail provided on the side rail,
The slide device includes a conversion mechanism that changes the height position of the striker in accordance with the movement of the movable side slide relative to the fixed side rail and holds the striker in a fixed state by contact. In the height direction between the striker and the engagement device due to the difference between the movement trajectory of the slide device and the movement trajectory of the seat back due to the height position change of the striker by the conversion mechanism. A reclining device for a vehicle seat, characterized in that the amount of displacement is absorbed. The vehicle seat reclining device according to claim 1,
The conversion mechanism is configured to hold a height position of the striker with respect to the stationary rail fixed by engagement of an engaging portion provided on the striker and a guide portion provided on the stationary rail. The guide portion extends in a long shape in the sliding direction of the movable rail, and the engaging portion is slid so that the height position at which the engaging portion is engaged is changed at each sliding position. A reclining device for a vehicle seat, which is shaped to guide and changes the height position of the striker. The vehicle seat reclining device according to claim 2,
The engaging portion provided on the striker is provided integrally with the striker and rotatably connected to the movable rail, and the guide portion provided on the fixed rail is the engagement member. A reclining device for a vehicle seat, which is formed as a long concave groove that receives a partial shape of a joint portion and maintains the rotational posture of the engaging portion and the striker.

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