JP6039393B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat that can be housed in a housing portion formed on a floor of a vehicle body in a state where a seat back overlaps with a seat cushion.

  2. Description of the Related Art Conventionally, a vehicle seat that can be accommodated in an accommodating portion formed on a floor of a vehicle body in a state in which the seat cushion and the seat back overlap with each other by rotating the seat cushion backward is known (for example, Patent Documents). 1). Specifically, in the vehicle seat, when the seat cushion is rotated backward, the seat back overlaps with the seat cushion, and the seat cushion and the seat back are accommodated together in the accommodating portion in the overlapped state. It is like that.

  In this vehicle seat, when the seat cushion is rotated, even if the seat back overlaps the bottom of the seat cushion, the seat back will not be opened by its own weight. Is provided with a locking mechanism for locking.

JP 2009-227157 A

  However, in the above-described technique, when the vehicle seat is taken out of the housing portion and placed in a seatable posture, the lock mechanism must be unlocked to raise the seat back in a collapsed state, and the operation is complicated. It had become. Further, for example, when the seat back interferes with a part of the vehicle main body when the vehicle seat is taken out of the housing and rotated forward, the seat cushion is separated from the seat back when the seat back is locked. In order not to leave, the vehicle had to be unlocked, and the vehicle seat could not be returned smoothly.

  Accordingly, the present invention provides a simple operation for raising the seat back with respect to the seat cushion in a vehicle seat that can be stored in a storage portion formed on the floor of the vehicle main body with the seat back overlapping the seat cushion. The purpose is to provide a vehicle seat.

  Further, the present invention provides a vehicle seat that can prevent the seat back from being opened by its own weight even when the seat back is overlapped under the seat cushion when the seat cushion is rotated. The purpose is to provide.

  An object of the present invention is to provide a vehicle seat that is easily unlocked by a member that locks a seat back to a seat cushion.

  In order to achieve the above-described object, a vehicle seat of the present invention includes a seat cushion and a seat back that is rotatable with respect to the seat cushion, and the seat cushion has a seating surface facing upward. By pivoting backward from the position, the seat can be moved to a housing position that is housed together with the seat back in a housing portion formed on the floor of the vehicle body, and the seat back is located between the normal position and the housing position. A vehicle seat that overlaps with the seat cushion that moves and is movable with the seat cushion, and locks the seat back with respect to the seat cushion when the seat back overlaps with the seat cushion. And the locking mechanism is disposed in a direction away from the seat cushion on the seat back. Characterized in that it is configured to unlock the seat back when the load is applied greater than the load.

  According to such a configuration, the lock is released when the seat back is raised by applying a force larger than a predetermined load to the seat back, so that it is not necessary to provide a separate mechanism for releasing the lock. This simplifies the operation when opening the seat back. Further, when the seat cushion and the seat back are moved from the stowed position to the normal position and the seat back interferes with a part of the vehicle body, the seat back is applied with a force greater than a predetermined load to lock the seat back. Since it is released, the seat cushion can be smoothly moved to the normal position.

  In the vehicle seat described above, it is desirable that the predetermined load be larger than a load that the seat back tends to separate from the seat cushion under its own weight in a state where the seat back overlaps under the seat cushion.

  According to this, even when the seat back is overlapped under the seat cushion, the seat back is not opened by the weight of the seat back, so that the operation is simplified.

  In the vehicle seat described above, the lock mechanism is provided on one of the seat cushion and the seat back so as to be swingable, and is provided on the other of the seat cushion and the seat back, and is engageable with the hook. And a spring that biases the hook toward the side where the hook engages with the engaged portion.

  According to this, the lock mechanism can be realized with a simple configuration.

  Further, in the vehicle seat in which the lock mechanism described above has a hook, the hook has a lock surface with which the engaged portion is engaged in a state in which the seat back is locked. It is desirable that the spring is directed toward the biasing direction with respect to the direction from the contact portion between the engaged portion and the lock surface toward the swing center of the hook.

  According to this, since the force by which the engaged portion pushes the lock surface works in the direction in which the hook is released, the lock is easily released.

  In the vehicle seat described above, the seat back overlaps with the seat cushion and is locked by the locking mechanism while the seat cushion moves from the normal position to the accommodation position, and the seat cushion is contained in the accommodation seat. While moving from the position to the normal position, the lock mechanism can be released away from the seat cushion.

  According to this, when the seat cushion in the normal position is lifted, since the seat backs do not overlap, the seat cushion can be lifted and stored in the storage portion with a light force.

  According to the configuration of the first aspect, since the lock is released when the seat back is raised by applying a force larger than a predetermined load to the seat back, it is not necessary to provide a separate mechanism for releasing the lock. This simplifies the operation when opening the seat back. Further, when the seat cushion and the seat back are moved from the stowed position to the normal position and the seat back interferes with a part of the vehicle body, the seat back is applied with a force greater than a predetermined load to lock the seat back. Since it is released, the seat cushion can be smoothly moved to the normal position.

  According to the second aspect of the present invention, even if the seat back is overlapped under the seat cushion, the seat back is not opened by the weight of the seat back, so that the operation is simplified.

  Moreover, according to the structure of Claim 3, a locking mechanism is realizable with a simple structure.

  Moreover, according to the structure of Claim 4, since the force by which a to-be-engaged part presses a lock surface works in the direction which a hook remove | releases, a lock | rock becomes easy to be cancelled | released.

  According to the fifth aspect of the present invention, when the seat cushion in the normal position is lifted, the seat back does not overlap, so that the seat cushion can be lifted and stored in the storage portion with a light force.

It is a perspective view showing a vehicular seat concerning one embodiment of the present invention. It is a figure (a) showing a seat cushion and an outside seat back, and a figure (b) showing a seat cushion and an inside seat back. It is an enlarged view of a hook and a pin. It is a figure which shows a seat cushion and an inner side seat back, Comprising: The figure (a) which shows the state located in a normal position, The state which pulled the belt from the state of the figure (a), and fell the outer side seat back and the inner side seat back It is a figure (b) shown. FIG. 5A is a diagram showing the seat cushion and the outer seat back in the state of FIG. 4B, and FIG. 5B is a diagram showing the state where the seat cushion is lifted and the seat cushion and the outer seat back are overlapped. It is the figure (a) which shows the vehicle seat rotated back, and the figure (b) which shows the vehicle seat accommodated in the accommodating part.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the present invention, front and rear, left and right, and top and bottom are based on a person sitting on a vehicle seat.

  As shown in FIG. 1, the vehicle seat S as an example of the vehicle seat of the present invention is, for example, a rear seat of a passenger car. The vehicle seat S is a three-seat seat, and the inner seat back S22 disposed between the two outer seat backs S21 and the two outer seat backs S21 with respect to one seat cushion S1 that is long on the left and right. Is provided on the left and right side.

  The vehicle seat S is provided such that a seat back S2 is rotatable with respect to the seat cushion S1. Thus, the vehicle seat S can be so-called reclining, in which the seat back S2 is tilted backward, and the seat back S2 can be tilted forward. Note that the left and right outer seat backs S21 and the inner seat back S22 are separately provided so as to be rotatable with respect to the seat cushion S1.

  The inner seat back S22 is provided with a grip S23 on the upper surface where a finger can be placed.

  Further, as shown in FIGS. 6A and 6B, the vehicle seat S is provided with a seat cushion S1 that is rotatable with respect to a vehicle body C as an example of a vehicle body. Thus, the seat cushion S1 is accommodated together with the seat back S2 in the recess C1 as an example of an accommodating portion formed on the floor of the vehicle body C by rotating backward from the normal position with the seating surface facing upward. It can be moved to the storage position. In addition, the recessed part C1 is arrange | positioned at the luggage compartment provided in the rear part of the vehicle body C, and is formed in the magnitude | size which can just fit the vehicle seat S of the folded state.

  2A and 2B, the seat cushion S1 includes a cushion main body 11 having a frame (not shown) therein, and an outer side that supports the cushion main body 11 so as to be rotatable with respect to the floor of the vehicle body C. A bracket 12 and an inner bracket 13 are provided. The cushion body 11 is provided on the lower surface with a gripping portion S14 on which a finger can be put (see FIG. 4A). The outer bracket 12 is provided at a position corresponding to each outer seat back S21, and the inner bracket 13 is provided at a position corresponding to the inner seat back S22.

  The outer bracket 12 includes a cushion fixing portion 12A that is fixed to the rear portion of the cushion body 11, and a seat back support portion 12B that extends upward from the rear end of the cushion fixing portion 12A and rotatably supports the outer seat back S21. Have. Further, the outer bracket 12 has an extending part 12C extending obliquely downward from the rear part at the lower end, and a through hole (not shown) is provided in the extending part 12C. A shaft C3 supported by the vehicle body C is inserted through the through hole.

  The inner bracket 13 includes a cushion fixing portion 13A that is fixed to the rear end of the cushion body 11, and a seat back support portion 13B that extends upward from the rear end of the cushion fixing portion 13A and supports the inner seat back S22 in a rotatable manner. have. Further, the inner bracket 13 has an extending portion 13C that extends rearward and obliquely downward from the rear portion of the lower end, and the extending portion 13C is provided with a through hole (not shown). A shaft C3 supported by the vehicle body C is inserted through the through hole.

  The vehicle seat S further includes a lock mechanism 30 and a reclining mechanism 40 for restricting the rotation of the outer seat back S21 and the inner seat back S22.

  The lock mechanism 30 is a mechanism for locking the outer seat back S21 to the seat cushion S1 when the outer seat back S21 overlaps the seat cushion S1. As shown in FIG. 2A, the lock mechanism 30 includes a pin 31 as an example of an engaged portion provided in the outer seat back S21 and a hook 32 provided in the seat cushion S1.

  The pin 31 is a member provided so as to protrude from the lateral side surface of the outer seat back S21.

  The hook 32 includes a shaft support portion 32A that is supported by the outer bracket 12 below the rotation shaft of the outer seat back S21, an arm portion 32B that extends from the shaft support portion 32A toward the outer seat back S21, and a tip of the arm portion 32B. And a collar portion 32C provided on the surface.

  The shaft support portion 32A has a through hole (not shown), and a boss 12D protruding from the side surface of the outer bracket 12 is inserted into the through hole. Further, the shaft support portion 32A has a shape in which the lower portion swells, and has a rocking shaft (center of the boss 12D), a spring locking portion 32F protruding outward in the radial direction, and a contact portion 32G. Yes. The abutting portion 32G is provided at a position where it can abut against the protrusion 12E protruding from the rear of the boss 12D of the outer bracket 12 outward in the left-right direction. The spring locking portion 32F is provided on the opposite side with the boss 12D interposed therebetween.

  The collar portion 32C is formed in a collar shape that can be hooked on a pin 31 (see a two-dot chain line) provided on the outer seat back S21 when the outer seat back S21 overlaps the seat cushion S1. The collar portion 32C faces the shaft support portion 32A, and the lock surface 32D that the pin 31 engages with the outer seat back S21 being locked, and the shaft support portion 32A from the end of the lock surface 32D that is far from the arm portion 32B. And a pressing surface 32E extending in the direction of leaving. The arm portion 32B has a contact surface 32H that contacts the pin 31 when the pin 31 is engaged with the lock surface 32D.

  The pressing surface 32E is a surface that is pressed by the pin 31 when the outer seat back S21 moves in a direction overlapping the seat cushion S1. The pressing surface 32E is formed so that when the pin 31 comes into contact, the direction in which the pin 31 presses the pressing surface 32E is directed to the direction in which the hook 32 is opened, that is, the direction in which the hook 32 is rotated clockwise in FIG. Has been.

  Further, as shown in FIG. 3, the normal vector A2 of the lock surface 32D at the contact portion P between the pin 31 and the lock surface 32D, and the normal vector A3 of the contact surface 32H at the contact portion Q of the pin 31 and the contact surface 32H. The orientation of the contact surface 32H is determined so that the angle α formed by the angle α becomes an angle (acute angle) smaller than 90 degrees. The angle α formed by the normal vector A2 and the normal vector A3 is set to 70 to 85 degrees, for example.

  As shown in FIG. 2, the hook 32 configured as described above is biased toward the side where the hook 32 engages with the pin 31 by a torsion coil spring 33 as an example of an elastic member provided on the outer bracket 12. Has been. Specifically, the coiled portion of the torsion coil spring 33 is supported by the boss 12D of the outer bracket 12, the arm at one end engages with the protrusion 12E formed on the outer bracket 12, and the arm at the other end is hook 32. Is engaged with a spring locking portion 32F formed on the shaft support portion 32A. The torsion coil spring 33 biases the hook 32 in the counterclockwise direction in FIG. The hook 32 biased by the torsion coil spring 33 is restricted from rotating by the biasing force of the torsion coil spring 33 when the abutment portion 32G formed on the shaft support portion 32A abuts on the protrusion 12E of the outer bracket 12. , Its attitude is prescribed.

  The hook 32 is configured to unlock the outer seat back S21 when a load larger than a predetermined load is applied to the outer seat back S21 in a direction away from the seat cushion S1.

  Specifically, the hook 32 is twisted in a direction (see arrow A1) in which the lock surface 32D is directed from the contact portion P between the pin 31 and the lock surface 32D toward the swing center of the hook 32 (center of the boss 12D). It is formed so as to face the biasing direction side of the coil spring 33 (see the normal vector A2 of the lock surface 32D). Thereby, when the outer seat back S21 moves away from the seat cushion S1, the force by which the pin 31 pushes the lock surface 32D acts in the direction in which the hook 32 is removed from the pin 31, so that the seat cushion is applied to the outer seat back S21. When a load larger than a predetermined load is applied in a direction away from S1, the pin 31 can push the lock surface 32D to release the lock. In addition, when the outer seat back S21 overlaps under the seat cushion S1, a predetermined load is applied to the outer seat under the seat cushion S1 so that the outer seat back S21 does not open due to its own weight. In a state in which the back S21 overlaps, it is desirable that the outer seat back S21 has a load that is greater than the load that tends to separate from the seat cushion S1 by its own weight.

  The reclining mechanism 40 is provided for each outer seat back S21 and inner seat back S22. In the present specification, the description will focus on the reclining mechanism 40 provided for the inner seat back S22.

  The reclining mechanism 40 includes a spiral spring 41 provided between the outer seat back S21 and the inner seat back S22 as shown in FIG. 1, and an engagement provided in the inner seat back S22 as shown in FIG. A member 42 and a plate 43 provided on the inner bracket 13 are provided.

  As shown in FIG. 1, the spiral spring 41 urges each outer seat back S <b> 21 and the inner seat back S <b> 22 in a direction that falls forward.

  As shown in FIG. 2B, the engaging member 42 is a member that is swingably supported on the side surface of the inner seat back S <b> 22 above the inner bracket 13. The engaging member 42 extends rearward from the base end supported by the inner seat back S22, and has a wedge-shaped protrusion protruding at the distal end toward the inner bracket 13, more specifically, the peripheral surface of the plate 43 described later. It has a portion 42A.

  The engaging member 42 has a wire 44 fixed between the proximal end and the distal end. As shown in FIG. 4A, the wire 44 has a lower end fixed to the engaging member 42 and an upper end connected to a belt 45 protruding from the back surface of the inner seat back S22. Thus, by pulling the belt 45, the tip end (projecting portion 42A) of the engaging member 42 can be swung so as to be separated from the peripheral surface of the plate 43 described later. The belt 45 is also connected to an engagement member provided for the outer seat back S21. By pulling one belt 45, all the engagement members can be swung. It is configured.

  Returning to FIG. 2B, the plate 43 has a circumferential surface that is an arc centered on the rotation axis of the inner seat back S <b> 22. The plate 43 is formed with an inclination adjusting groove 43A and a locking groove 43B that can be engaged with the protrusion 42A of the engaging member 42 on the peripheral surface.

  The inclination adjusting groove 43A is a groove that determines the posture of the inner seat back S22 with respect to the seat cushion S1 by engaging the protrusion 42A, and a plurality of inclination adjusting grooves 43A are formed in the circumferential surface of the rear portion of the plate 43 in the circumferential direction. ing.

  The locking groove 43 </ b> B is a groove with which the protrusion 42 </ b> A engages when the inner seat back S <b> 22 overlaps the seat cushion S <b> 1, and is formed in the front portion of the plate 43. The locking groove 43B is provided only in the reclining mechanism 40 provided for the inner seat back S22, and is not provided in the reclining mechanism 40 provided for the outer seat back S21. .

The operation and effect of the vehicle seat S configured as described above will be described.
As shown in FIG. 4A, when the vehicle seat S is accommodated in the recess C1, the belt 45 is first pulled. As a result, the engaging member 42 is pulled up, and the protrusion 42A is disengaged from the inclination adjusting groove 43A. As shown in FIG. 4B, the outer seat back S21 and the inner seat back S22 are turned into the spiral spring 41 (FIG. 1)).

  The fallen inner seat back S22 overlaps with the seat cushion S1, and the protrusion 42A of the engaging member 42 engages with the locking groove 43B. As a result, the inner seat back S22 is locked in a state where it overlaps the seat cushion S1.

  On the other hand, when the wheel house C2 is provided on the left and right sides of the vehicle seat S, the outer seat back S21 hits the wheel house C2 and stops in the bumped state. Thus, in a state where the outer seat back S21 does not overlap the seat cushion S1, the hook 32 of the lock mechanism 30 is not engaged with the pin 31 as shown in FIG.

  Then, when the inner seat back S22 is lifted by holding the grip portion S23 and rotated backward, the seat cushion S1 and the inner seat back S22 are placed on the axis C3 while the outer seat back S21 stops while hitting the wheel house C2. Rotate around the center.

  Then, as shown in FIG. 5B, when the seat cushion S1 moves to a position where it overlaps the outer seat back S21, the pin 31 of the lock mechanism 30 pushes the pressing surface 32E of the hook 32 to swing the hook 32, 32 is engaged with the pin 31. Accordingly, the outer seat back S21 is locked with respect to the seat cushion S1. That is, the outer seat back S21 overlaps with the seat cushion S1 and is locked by the lock mechanism 30 while the seat cushion S1 is moving from the normal position to the storage position, and can move together with the seat cushion S1.

  When the seat cushion S1 is further rotated rearward with the seat back S2 (the outer seat back S21 and the inner seat back S22) locked to the seat cushion S1, as shown in FIG. 6A, the seat cushion S1 The seating surface faces downward and the seat back S2 is in a posture of being overlapped under the seat cushion S1.

  Then, when the seat back S2 is overlapped with the seat cushion S1, and the seat cushion S1 is further rotated and moved to the storage position, as shown in FIG. 6B, the vehicle seat S enters the recess C1. Be contained. Thereby, the space of a luggage compartment can be expanded.

  When the vehicle seat S accommodated in the recess C1 is returned to a seatable state, first, the grip portion S14 formed on the bottom surface of the seat cushion S1 is gripped, and the seat cushion S1 is lifted.

  At this time, the outer seat back S21 is in a state of being overlapped under the seat cushion S1, but since the hook 32 of the lock mechanism 30 engages with the pin 31 and is locked to the seat cushion S1, Due to the weight of the seat back S21, the outer seat back S21 does not open and is lifted together with the seat cushion S1, as shown in FIG.

  Further, the inner seat back S22 is also in a state of being overlapped under the seat cushion S1, but the protrusion 42A of the engaging member 42 is engaged with the locking groove 43B and is locked to the seat cushion S1. Therefore, the inner seat back S22 is lifted together with the seat cushion S1 without opening due to the weight of the inner seat back S22. Thereby, when the seat cushion S1 is lifted, the seat back S2 can be prevented from being opened and caught in the recess C1.

  When the vehicle seat S is rotated forward, the outer seat back S21 collides with the wheel house C2 as shown in FIG. At this time, a load larger than a predetermined load is applied to the outer seat back S21 in a direction away from the seat cushion S1, the pin 31 of the lock mechanism 30 pushes the lock surface 32D, the hook 32 rotates, and the hook 32 moves from the pin 31. Come off. Thereby, the lock | rock of outer side seat back S21 is cancelled | released. That is, the outer seat back S21 is separated from the seat cushion S1 and unlocked by the lock mechanism 30 while the seat cushion S1 is moving from the storage position to the normal position. Thereby, the seat cushion S1 and the inner seat back S22 can be further rotated while the outer seat back S21 hits the wheel house C2.

  Thus, the lock mechanism 30 is configured to release the lock of the outer seat back S21 when a load larger than a predetermined load is applied to the outer seat back S21 in a direction away from the seat cushion S1. When the seat back S21 interferes with a part of the vehicle body C such as the wheel house C2, the lock mechanism 30 is unlocked, and the seat cushion S1 can be smoothly moved to the normal position.

  As shown in FIG. 4B, after the seat cushion S1 is returned to the normal position, the belt 45 is pulled to release the engagement between the protrusion 42A of the engaging member 42 and the locking groove 43B, and the inner seat. Back S22 is raised.

  And since the lock | rock by the lock mechanism 30 has already been cancelled | released, the outer side seat back S21 only needs to raise it back and raise.

  For example, when the outer seat back S21 does not interfere with a part of the vehicle body C such as the wheel house C2 and the seat cushion S1 is moved to the normal position, the outer seat back S21 overlaps the seat cushion S1. However, if the outer seat back S21 is pulled by applying a force of a predetermined load or more, the lock mechanism 30 is unlocked, so an operation for releasing the lock (for example, an operation such as pulling the belt 45) is performed. It becomes unnecessary, and the operation when opening the outer seat back S21 is simplified.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. About a concrete structure, it can change suitably in the range which does not deviate from the meaning of this invention.

  In the embodiment, the pin 31 constituting the lock mechanism 30 is provided on the outer seat back S21 and the hook 32 is provided on the seat cushion S1, but the present invention is not limited to this. For example, a pin may be provided on the seat cushion S1 and a hook may be provided on the outer seat back S21.

  In the embodiment, the lock mechanism 30 is provided only for the outer seat back S21. However, the present invention is not limited to this, and the lock mechanism 30 may also be provided for the inner seat back S22. .

30 Locking mechanism 31 Pin 32 Hook 32D Lock surface 33 Coil spring C Car body C1 Recess C2 Wheelhouse S Vehicle seat S1 Seat cushion S2 Seat back S21 Outer seat back S22 Inner seat back

Claims (5)

Seat cushion,
A seat back rotatable with respect to the seat cushion,
The seat cushion is movable to a storage position that is accommodated together with the seat back in a storage portion formed on the floor of the vehicle body by rotating backward from a normal position with the seating surface facing upward,
The seat back is a vehicle seat that is movable with the seat cushion so as to overlap the seat cushion moving between the normal position and the storage position,
A lock mechanism for locking the seat back to the seat cushion when the seat back overlaps the seat cushion;
The lock mechanism is configured to unlock the seat back when a load larger than a predetermined load is applied to the seat back in a direction away from the seat cushion ,
The lock mechanism includes a hook that is swingably provided on one of the seat cushion and the seat back, and an engaged portion that is provided on the other of the seat cushion and the seat back and is engageable with the hook. A vehicle seat, comprising: a spring that biases the hook toward a side where the hook engages with the engaged portion. Seat cushion,
A seat back rotatable with respect to the seat cushion,
The seat cushion is movable to a storage position that is accommodated together with the seat back in a storage portion formed on the floor of the vehicle body by rotating backward from a normal position with the seating surface facing upward,
The seat back is a vehicle seat that is movable with the seat cushion so as to overlap the seat cushion moving between the normal position and the storage position,
A lock mechanism for locking the seat back to the seat cushion when the seat back overlaps the seat cushion;
The lock mechanism is configured to unlock the seat back when a load larger than a predetermined load is applied to the seat back in a direction away from the seat cushion ,
The seat back overlaps with the seat cushion and is locked by the lock mechanism while the seat cushion moves from the normal position to the accommodation position, and the seat cushion moves from the accommodation position to the normal position. The vehicle seat is released from the seat cushion while being locked by the lock mechanism. The lock mechanism includes a hook that is swingably provided on one of the seat cushion and the seat back, and an engaged portion that is provided on the other of the seat cushion and the seat back and is engageable with the hook. The vehicle seat according to claim 2 , further comprising a spring that biases the hook toward a side where the hook is engaged with the engaged portion. The hook has a lock surface that engages the engaged portion in a state where the seat back is locked,
The locking surface, according to claim 1, characterized in that facing urging direction of the spring with respect to a direction toward the swing center of the said hook from the abutment portion of the locking surface and the engaged portion Alternatively, the vehicle seat according to claim 3 . Said predetermined load, in a state where the seat back overlaps below the seat cushion, claim from claim 1, wherein the seat back is greater than the load to move away from the seat cushion by its own weight The vehicle seat according to any one of 4 .

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