JP2007111121A - Vehicle seat - Google Patents

Abstract

A vehicle seat capable of ensuring a side hold property in a predetermined case is obtained.
A vehicle seat has a side support that protrudes upward from a seating surface portion at an end in a width direction of a seat cushion. The side support 22 is held in shape by the movable side support holding member 26 being positioned at the holding position by the urging force of the compression coil spring 32, and the movable side support holding member 26 is retracted below the holding position by a downward load of a predetermined value or more. When it reaches the position, it can be compressed and deformed. When the weight part 42 moves outward in the width direction by the outward acceleration in the width direction, the lock member 38 reaches a lock position where the movable side support holding member 26 is locked in the holding position.
[Selection] Figure 1

Description

  The present invention relates to a vehicle seat mounted on a vehicle such as an automobile.

In the vehicle seat that has a seat side part (side support) that protrudes above the seat cushion side surface on the side of the seat cushion, and secures side-holding, attach the side support upward with a torsion spring when seated It has been considered to secure the side-holding property and reduce the overall thickness by making the seat side portion the same height as the seat cushion when folding the seat (see, for example, Patent Document 1).
JP 2000-316663 A Japanese Utility Model Publication No. 1-167928

  However, in the conventional technology as described above, the seat side portion is simply held at the side hold position by the urging force of the torsion spring so that the seat side portion can be pulled down when the seat is folded. When a downward load larger than the force acts on the seat side portion, there is a concern that the seat side portion may be displaced downward to ensure side hold performance.

  In view of the above facts, an object of the present invention is to obtain a vehicle seat capable of ensuring side hold performance in a predetermined case.

  In order to achieve the above object, a vehicle seat according to the invention described in claim 1 is provided at a side portion of a seat cushion or a seat back, and holds a side support so as to protrude sideways of a seated person, A side support support member capable of taking a retracted position opposite to the protruding side of the side support with respect to the holding position, and the side support supporting member is biased to the holding position, and a load of a predetermined value or more is applied to the retracted position side. By engaging the biasing means for releasing the biased state of the side support support member to the holding position, a lock release position that allows the side support support member to move to the retracted position, and engaging the side support support member. A locking member capable of taking a locking position for locking the side support supporting member in the holding position; and the seat cushion. The load equal to or greater than a predetermined value acts in the width direction of the ® down or the seat back and a, a moving force imparting means for moving the locking position from the unlocking position the locking member.

  In the vehicle seat according to claim 1, when the side support support member is positioned at the holding position to hold the protruding state of the side support and the lock member is positioned at the unlocked position, the side support support member is predetermined toward the retracted position side. When a load greater than the value is applied, it moves to the retracted position. When a load greater than or equal to a predetermined value in the sheet width direction is applied to the moving force applying means, the moving force applying means moves the lock member to the lock position. In this locked state, the side support supporting member is prevented from moving to the retracted position even when a load of a predetermined value or more is applied to the retracted position side, and the side support is ensured.

  Thus, in the vehicle seat according to the first aspect, the side hold property can be secured in a predetermined case.

  The vehicle seat according to a second aspect of the present invention is the vehicle seat according to the first aspect, wherein the moving force applying means is applied to the lock member by an acceleration acting outward in a width direction of the seat cushion or the seat back. Is moved from the unlocked position to the locked position.

  In the vehicle seat according to claim 2, for example, when acceleration is applied outward in the seat width direction due to turning of the mounted vehicle, a predetermined value is separately applied to the moving force applying means outward in the seat width direction based on the acceleration. When the above load acts, the lock member reaches the lock position. For this reason, it is sufficient for the moving force applying means to have a mass corresponding to, for example, a set load (separately predetermined load) and an assumed acceleration, and the structure is simple. In this configuration, the lock member itself having a predetermined mass (the mass of the lock member) can be used as the moving force applying means.

  A vehicle seat according to a third aspect of the present invention is the vehicle seat according to the first aspect, wherein the moving force applying means is a protrusion of the side support with respect to a seating surface of the seat cushion or an upper body supporting surface of the seat back. An arm member that rotates about an axis along a direction, and one end side of the arm member with respect to the axis serves as a load input portion to which an outward load in the width direction of the seat cushion or the seat back acts, and the arm The lock member is provided on the other end side with respect to the front axis of the member.

  In the vehicle seat according to claim 3, the arm member in which an outward load in the seat width direction that is a predetermined value or more is separately applied to the load input portion rotates around the axis, and the load input portion is defined with respect to the axis. The lock member located on the opposite side is moved to the lock position. Thereby, the arrangement | positioning freedom degree of a locking member increases.

  A vehicle seat according to a fourth aspect of the present invention is the vehicle seat according to the first or third aspect, wherein the side support support member has the side support provided at a side portion of the seat cushion from the seat surface. A seating position in which the lock member or the load input portion is seated on the seat cushion. The leg is arranged so that it is pressed by the leg when it moves sideways.

  5. The vehicle seat according to claim 4, wherein a side support support member, a biasing means, a lock member, and a moving force imparting means are provided for holding the side support of the seat cushion. For example, the seat seating is performed along with the turning of the mounted vehicle. When acceleration in the seat width direction acts on the person, the load input portion of the lock member or the arm member is pressed by the legs that move outward from the seat due to the acceleration. Thereby, the lock member moves to the lock position, and the side support support member is held at the holding position. Thus, in the present vehicle seat, the lock member can be reliably moved to the lock position by the leg that starts moving before the seated person's waist is moved by the acceleration in the seat width direction.

  The vehicle seat according to a fifth aspect of the present invention is the vehicle seat according to any one of the first to fourth aspects, further comprising a biasing means for biasing the lock member toward the unlocking position. Prepared.

  The vehicle seat according to claim 5 has a biasing member that biases the lock member to the unlocking position. Therefore, when a load in the seat width direction of a predetermined value or more does not act on the moving force applying means, the load is When the lock member is released, the lock member is biased to the lock release position. For this reason, the movement of the side support support member to the retracted position is allowed, and the side support is prevented from becoming an obstacle when, for example, the passenger gets on or off the vehicle or the seat is folded.

  As described above, the vehicle seat according to the present invention has an excellent effect that the side hold property can be secured in a predetermined case.

  A vehicle seat 10 as a vehicle seat according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. It should be noted that the arrows FR and UP appropriately shown in the drawings indicate the forward direction (traveling direction) and the upward direction of the automobile to which the vehicle seat 10 is applied, respectively, and the arrow OUT indicates the seat width that matches the vehicle width direction. The outside of the direction is shown.

  FIG. 2 is a front view showing a schematic overall configuration of the vehicle seat 10. As shown in this figure, the vehicle seat 10 includes a seat cushion 12 on which an occupant of an automobile is seated, and a seat back 14 that supports the upper body of the seated occupant from behind. The seat cushion 12 is configured by providing cushion members 18 on the seat cushion frame 16 and forming side supports 22 on the outer sides in the width direction of the seat surface portion 20 located at the center in the width direction that coincides with the vehicle width direction. . Since the pair of side supports 22 are configured symmetrically, only one side support 22 will be described below.

  At the end in the width direction of the seat cushion 12, the side support 22 supported by the side support support portion 24 protrudes upward from the seat surface portion 20 to hold the occupant (seat occupant) (position toward the outer side of the occupant in the width direction). To suppress deviation). In the vehicle seat 10, the side support support portion 24 includes the movable side support support member 26, and a user-friendly structure is realized while ensuring required occupant hold performance. This will be specifically described below.

  As shown in FIG. 1, the movable side support support member 26 includes a support plate portion 26A that supports the cushion material 18 in the cushion material 18, and a guided shaft portion 26B that is suspended from the support plate portion 26A. The support plate portion 26A is curved inward in the width direction and has a cam shape that converts part of the outward load in the vehicle width direction into a downward load.

  Further, the side support support portion 24 includes a guide cylinder 30 fixed to the side frame 16 </ b> A constituting the side portion of the seat cushion frame 16 via the bracket 28. The guide cylinder 30 has its axis substantially coincided with the up-down direction, which is an upright direction with respect to the seat surface portion 20, and has an opening 30A at the upper end.

  A guided shaft portion 26B of the movable side support support member 26 is inserted into the guide tube 30 so as to be slidable in the axial direction. As a result, the movable side support support member 26 is guided by the guide cylinder 30 and can move in the vertical direction, and the holding position (FIG. 5) supports the cushion material 18 so that the side support 22 is formed in an appropriate shape. 1) and a retracted position (see FIG. 4C) that allows the side support 22 to be compressed (collapsed) by being positioned below the holding position. In FIGS. 1 and 4, the buttocks (waist) H of the occupant P in a seated (sunk) state is indicated by a broken line.

  A compression coil spring 32 serving as a biasing means is disposed between the bottom 30B of the guide tube 30 and the lower end surface of the guided shaft portion 26B. The compression coil spring 32 biases the movable side support support member 26 upward to bias it to the holding position. The retracted position is not a fixed position, but is a position between the lower limit position where the compression coil spring 32 bottoms and the holding position. The movable side support support member 26 reaches the retracted position when a downward load exceeding a predetermined value against the urging force of the compression coil spring 32 is applied. In this embodiment, the movable side support support member 26 can be moved (lowered) from the holding position to the retracted position when the support plate portion 26A having the cam shape is pressed by the occupant moving outward in the width direction. It is said that.

  And the side support support part 24 is provided with the lock mechanism 34 for locking the movable side support support member 26 to a holding position in a predetermined case. The lock mechanism 34 includes a lock engagement portion 36 provided on the guided shaft portion 26B of the movable side support support member 26, a lock position for engaging the lock engagement portion, and a lock release position for releasing the engagement. And a lock member 38 that can be taken.

  As shown in FIG. 1, the lock engaging portion 36 is formed as a concave portion that opens inward in the width direction. Further, the guide tube 30 is formed with a slit 40 for the lock member 38 to access the lock engaging portion 36. The lock member 38 has a lock portion 38A that is elongated in the front-rear direction. The lock member 38 is movable to the guide tube 30 by being positioned at a lock position where the lock portion 38A enters the slit 40 and engages the lock engagement portion 36. The vertical movement of the side support support member 26 is restricted.

  As shown in FIG. 3A, the lock member 38 includes a pair of front and rear guided portions 38B extending outward in the width direction from the front and rear ends of the lock portion 38A, and the width direction outer ends of the pair of guided portions. The connecting portion 38 </ b> C to be connected is formed in a rectangular frame shape including the lock portion 38 </ b> A and surrounding the guide tube 30 as a whole. The connecting portion 38C is connected to a weight portion 42 as a moving force applying means having a predetermined mass.

  On the other hand, the guide tube 30 is provided with a pair of upper and lower guide flanges 44 for guiding the guided portion 38B of the lock member 38 so as to be slidable in the width direction. Thereby, the lock member 38 is guided by the guide flange 44 and moves in the width direction, whereby the lock portion 38A engages (enters) the lock engagement portion 36 (see FIG. 4B). The lock portion 38 </ b> A is configured to be able to take the lock release position (see FIG. 1) where the lock portion 38 </ b> A has come out of the lock engagement portion 36.

  Further, as shown in FIG. 3B, which is a cross-sectional view taken along line 3B-3B of FIG. 3A, the lock mechanism 34 has a return spring 46 as an urging member. The return spring 46 is a compression coil spring. The outer end in the width direction abuts against a spring receiving wall 48 positioned between the upper and lower guide flanges 44, and the inner end in the width direction abuts the width direction outward surface of 38A. It touches. As a result, the return spring 46 is configured to bias the lock member 38 inward in the width direction and bias the lock member 38 to the unlocked position.

  In the lock mechanism 34 described above, the lock portion 38A moves from the lock release position to the lock position against the urging force of the return spring 46 when the outward acceleration in the width direction greater than a predetermined value acts on the vehicle seat 10. The mass of the weight portion 42 (as the whole lock member 38) is set so as to move.

  The lock mechanism 34 can be easily assembled by dividing the guide cylinder 30 vertically between the upper and lower guide flanges 44 or by forming a rectangular frame-shaped lock member 38 in a divided structure.

  Next, the operation of the first embodiment will be described.

  In the vehicle seat 10 having the above-described configuration, the movable side support support member 26 is moved by the urging force of the compression coil spring 32 as shown in FIGS. At the holding position, the side support 22 is held in an appropriate shape, and the urging force of the return spring 46 allows the lock member 38 to be positioned at the unlocked position, allowing the movable side support support member 26 to move to the retracted position. Yes. For this reason, the occupant P is not excessively restrained by the side support 22 and can take a relatively free sitting posture.

  On the other hand, while the vehicle on which the vehicle seat 10 is mounted is turning (curving), the vehicle seat 10, that is, the lock member 38 (the weight portion 42) is subjected to an outward acceleration in the width direction. When the acceleration is equal to or greater than a predetermined value, the lock member 38 moves outward in the width direction against the urging force of the return spring 46, and the lock portion 38A of the lock member 38 is movable as shown in FIG. It engages with the lock engaging portion 36 of the side support support member 26.

  As a result, the movable side support support member 26 is locked to the holding position where the movement to the retracted position is prevented, and the downward load exceeding the predetermined value (the width direction outside which is converted into the downward load by the support plate portion 26A). Even if the direction load is applied, the side support 22 is kept in an appropriate shape. Therefore, in the vehicle seat 10, the side support 22 effectively lifts the occupant P (particularly the waist) as shown in FIG. 4B during turning of the automobile in which the acceleration in the width direction also acts on the occupant P. It is excellent in holdability.

  When the automobile finishes turning and travels straight, the lock member 38 returns to the unlocked position by the urging force of the return spring 46.

  When the vehicle stops and the occupant P of the vehicle seat 10 gets off, the movable side support support member 26 pressed by the leg L of the occupant P is in the retracted position, as shown in FIG. The side support 22 is compressed and deformed. Thereby, the passenger | crew P can land a leg | foot on a road surface with a natural attitude | position. Similarly, since the side support 22 is compressed by the weight of the occupant P when boarding, it is possible to ride in a natural posture.

  As described above, in the vehicle seat 10 according to the present embodiment, the lock mechanism 34 that locks the movable side support support member 26 in the holding position by the outward acceleration in the width direction is provided. It has been realized that the required side-holding property is ensured in a predetermined case where the above is required. In addition, the vehicle seat 10 has a simple structure that does not rely on an actuator, and it is realized to ensure the side hold property in the predetermined case.

  On the other hand, since the vehicle seat 10 includes the return spring 46 that biases the lock member 38 to the unlocked position, the movable side support support member 26 is not locked to the holding position during normal use. For this reason, in the vehicle seat 10, it has been realized that the side holdability in the predetermined case is ensured while improving ease of use during normal use such as getting on and off.

  Next, another embodiment of the present invention will be described. Note that parts and portions that are basically the same as those in the first embodiment or the previous configuration are denoted by the same reference numerals as those in the first embodiment or the previous configuration, and description thereof is omitted. Illustration may be omitted.

(Second Embodiment)
FIG. 5A shows a schematic configuration of one end side in the width direction of the vehicle seat 50 according to the second embodiment in a plan view, and FIG. 5B shows the vehicle seat 50. Is schematically shown in a side view. As shown in these drawings, the vehicle seat 50 is different from the vehicle seat 10 according to the first embodiment in that a lock mechanism 52 is provided instead of the lock mechanism 34.

  The locking mechanism 52 locks the movable side support support member 26 in the holding position by positioning the lock member 54 having a substantially rectangular flat plate shape at the lock position where the lock member 54 is engaged with the lock engagement portion 36 of the movable side support support member 26 through the slit 40. It is supposed to be. The lock member 54 is configured such that the outer side in the width direction with respect to the guide tube 30 is the unlock position, and the lock member 54 moves inward in the width direction from the unlock position to take the lock position.

  The lock member 54 is provided on the rear end side of the arm member 56 that is elongated along the front-rear direction so as to protrude inward in the width direction. The arm member 56 is rotated in a substantially horizontal plane by a rotation shaft 58 having an axis along the vertical direction (upright direction with respect to the seat surface portion 20) inserted through a support boss portion 56A provided in the middle portion in the longitudinal direction. It is pivotally supported. As a result, the lock member 54 moves from the unlocked position to the locked position when the arm member 56 rotates in the direction of the arrow A so that the front side portion moves outward in the width direction with respect to the rotating shaft 58, and the arrow moves from the locked position to the arrow. It is set as the structure which moves to the unlocking position by rotating in the arrow B direction opposite to A.

  Further, the lock mechanism 52 includes a return spring 60 as a biasing member that biases the arm member 56 in the direction of arrow B. The return spring 60 is a torsion coil spring in which the rotating shaft 58 is inserted into the coil portion, one end side is locked to the arm member 56, and the other end side is locked to the side frame 16A. The arm member 56 urged in the arrow B direction by the return spring 60 is configured to engage the stopper 62 so that the lock member 54 is positioned at the unlock position.

  On the other hand, a pressing plate portion 64 as a load input portion is provided at a front end portion of the arm member 56 opposite to the position where the lock member 54 is installed with respect to the rotation shaft 58. The pressing plate portion 64 is formed in a flat plate shape along the vertical direction and the front-rear direction, and is disposed in the side support 22. When the leg L of the occupant P moves outward in the width direction as shown in FIG. 6A, the pressing plate portion 64 is pressed by the leg L as shown in FIG. It is supposed to move. Therefore, in the lock mechanism 52, when the leg L of the occupant P attempts to move outward in the width direction, the arm member 56 is rotated in the direction of the arrow A and the lock member 54 is set to reach the lock position.

  As described above, the arm member 56 functions as a moving force applying unit that converts a load from the leg L input to the pressing plate portion 64 into a moving force toward the lock position of the lock member 54 against the return spring 60. The lock member 54 is configured to perform a guide function of guiding with a predetermined activation between the lock position and the lock release position.

  In the vehicle seat 50 described above, the movable side support support member 26 is positioned at the holding position by the urging force of the compression coil spring 32 and holds the side support 22 in an appropriate shape when the mounted automobile is in a straight running state or stopped state. At the same time, as indicated by a solid line in FIG. 5A, the urging force of the return spring 60 causes the lock member 54 to be positioned at the unlocked position, thereby allowing the movable side support support member 26 to move to the retracted position. For this reason, the occupant P is not excessively restrained by the side support 22 and can take a relatively free sitting posture.

  On the other hand, when an outward acceleration in the width direction acts on the occupant P occupant of the vehicle seat 50 while the vehicle on which the vehicle seat 50 is mounted is turning (curving), the occupant's leg L is longer than the waist. First move outward in the width direction. The leg L that has moved a predetermined distance or more outward in the width direction presses the pressing plate portion 64 outward in the width direction via the cushion material 18 to rotate the arm member 56 in the direction of arrow A, thereby moving the lock member 54 to the movable side support. The lock member is moved to a lock position where the lock member engages with the lock engagement portion of the support member.

  As a result, the movable side support support member 26 is locked to the holding position where movement to the retracted position is prevented, and a downward load equal to or greater than a predetermined value (a width direction outwardly converted into a downward load by the support plate portion 26A). Even if the load is applied, the side support 22 is kept in an appropriate shape. Therefore, in the vehicle seat 50, the side support 22 effectively restrains the occupant P (particularly the waist) during turning of the automobile in which the acceleration in the width direction also acts on the seated vehicle. Excellent.

  When the automobile finishes turning and travels straight, the lock member 54 returns to the unlocked position by the urging force of the return spring 60.

  When the vehicle stops and the occupant P of the vehicle seat 50 gets off, the leg L of the occupant P is placed on the side support 22 so that the lock member 54 does not move to the lock position or the lock position. The lock member 54 moved to the side returns to the unlocked position, the movable side support support member 26 pressed by the leg L of the occupant P moves to the retracted position, and the side support 22 is compressed and deformed. Thereby, the passenger | crew P can land a leg | foot on a road surface with a natural attitude | position. Similarly, since the side support 22 is compressed by the weight of the occupant P when boarding, it is possible to ride in a natural posture.

  As described above, the vehicle seat 50 according to the present embodiment is provided with the lock mechanism 52 that locks the movable side support support member 26 in the holding position by the outward load in the width direction. It has been realized that the required side-holding property is ensured in a predetermined case where the above is required.

  Moreover, in the vehicle seat 50, it has been realized that the side hold performance in the predetermined case is ensured with a simple structure that does not depend on the actuator. In particular, since the lock member 54 is driven via the arm member 56, the degree of freedom of arrangement of the lock mechanism is high. Furthermore, the lock mechanism 52 presses the leg L using the characteristic that the leg L moves outward in the width direction before the waist of the occupant P when the acceleration in the width direction outwards is applied (operation unconsciously). Since the pressed plate portion 64 is provided on the opposite side of the arm member 56 from the lock member 54, the period when the leg L presses the side support 22 (press plate portion 64) while the lock member 54 is reliably positioned at the lock position. Side hold property can be secured throughout.

  On the other hand, since the vehicle seat 50 includes the return spring 60 that biases the lock member 54 to the unlock position, the movable side support support member 26 is not locked to the holding position during normal use. For this reason, in the vehicle seat 50, it has been realized that the side holdability in the predetermined case is ensured while improving usability during normal use such as getting on and off.

(Third embodiment)
FIG. 7A is a plan view showing a schematic configuration on one end side in the width direction of the vehicle seat 70 according to the third embodiment of the present invention. As shown in this figure, the vehicle seat 70 differs from the vehicle seat 10 according to the first embodiment in that a side support support portion 72 is provided instead of the side support support portion 24.

  The side support support portion 72 includes a movable side support support member 74 formed in a plate shape that is curved upward and convex. The support plate is inserted into a boss 74A provided at the inner end in the width direction and is pivotally supported around the support shaft 76 by a support shaft 76 which is long in the front-rear direction and fixed to the side frame 16A. ing. By rotating in the direction of arrow C or arrow D around the support shaft 76, the movable side support support member 74 supports the cushion material 18 so that the side support 22 is formed in an appropriate shape (FIG. 7 ( A) (refer to the solid line in FIG. 7A) and a retracted position (see the imaginary line in FIG. 7A) that allows the side support 22 to be compressed (collapsed) by being positioned below the holding position. .

  Further, the side support support part 72 includes a torsion coil spring 78 that biases the movable side support support member 74 toward the holding position (see arrow D). The torsion coil spring 78 has a support shaft 76 inserted through the coil portion, and one end side is locked to the movable side support support member 74 and the other end side is locked to the side frame 16A. The movable side support support member 74 is pressed against a stopper (not shown) by the urging force of the torsion coil spring 78 so that the movable side support support member 74 is biased to the holding position. In this embodiment, the movable side support support member 74 positioned at the holding position inclined upward and inward of the seat is pressed from the holding position to the retracted position by being pressed by the occupant moving outward in the width direction. It is set as the structure which can move.

  Further, the vehicle seat 70 includes a lock mechanism 80 instead of the lock mechanism 34. As shown in FIG. 7B, the lock mechanism 80 is locked by a movement in the width direction, and a lock hole 82 provided in the boss 74A of the movable side support support member 74 so as to open inward in the width direction at the lock position. And a lock member 84 that can be moved back and forth with respect to the hole 82. The lock member has a lock portion 84A that enters the lock hole 82 at the lock position, and a weight portion 84B as a moving force applying means provided on the inner side in the width direction of the lock portion 84A.

  In this lock member 84, the lock portion 84A is guided by the guide body 86 so as to be slidable in the width direction, and the return that urges the lock member 84 toward the unlock position between the guide body 86 and the weight portion 84B. A spring 88 is provided. The return spring 88 is a compression coil spring, and the lock portion 84A is inserted through the return spring 88. The lock member 84 is biased to the unlocked position by the protrusion 84 </ b> C provided on the lock portion 84 </ b> A engaging the stopper 86 </ b> A of the guide body 86 by the urging force of the return spring 88.

  The lock mechanism 80 acts against the urging force of the return spring 88 so that the lock member 84 reaches a lock position where the lock member 84A enters the lock hole 82 when acceleration in the width direction exceeding a predetermined value is applied. Thus, the mass of the weight portion 84B is determined. In this embodiment, the support shaft 76 is provided with a relief recess 76A for allowing the tip of the lock portion 84A located at the lock position to enter.

  Also in the vehicle seat 70 described above, the lock mechanism 80 that locks the movable side support support member 74 in the holding position by the outward acceleration in the width direction is provided. As a result, it is possible to secure the side hold property in a predetermined case where the property is required. In addition, the vehicle seat 70 has also been realized to ensure the side-holding property in the predetermined case with a simple structure that does not depend on the actuator.

  In addition, since the vehicle seat 70 includes the return spring 88 that biases the lock member 84 to the unlocked position, similarly to the vehicle seat 10, the movable side support support member 74 is locked to the holding position during normal use. There is no. For this reason, the vehicle seat 70 is also capable of improving the ease of use during normal use, such as getting on and off, and ensuring the side hold property in the predetermined case.

(Fourth embodiment)
FIG. 8 is a perspective view showing a schematic configuration on one end side in the width direction of a vehicle seat 90 according to the fourth embodiment of the present invention. As shown in this figure, the vehicle seat 90 differs from the vehicle seat 10 according to the first embodiment in that a side support support portion 92 is provided instead of the side support support portion 24.

  The side support support portion 92 includes a movable side support support member 94 that is elongated in the front-rear direction, an upper end portion that is rotatably connected to a front end portion of the movable side support support member 94 via a link pin 96A, and a lower end that is a side frame. A front link 96 is rotatably connected to 16A via a link pin 96B, and an upper end is rotatably connected to a rear end of the movable side support support member 94 via a link pin 98A, and a lower end is a side. A rear link 98 is rotatably connected to the frame 16A via a link pin 98B.

  Thus, the side support support portion 92 forms a four-joint link having the side frame 16A as a fixed link, and the movable side support support member 94 has a holding position where the front and rear links 96, 98 stand up with respect to the side frame 16A ( 8) and a retracted position (not shown) in which the front and rear links 96, 98 are tilted backward and lowered with respect to the holding position.

  Further, the side support support portion 92 includes a torsion coil spring 100 that biases the movable side support support member 94 toward the holding position (see arrow C). In the torsion coil spring 100, the link pin 98B is inserted into the coil portion, one end side is locked to the rear link 98, and the other end side is locked to the side frame 16A. The movable side support support member 94 is pressed against a stopper (not shown) by the biasing force of the torsion coil spring 100 so that the movable side support support member 94 is biased to the holding position.

  The movable side support support member 94 includes a support plate portion 94A that supports the cushion material 18 in the cushion material 18, and a link connection portion 94B that is suspended from the outer end in the width direction of the support plate portion 94A. In 94B, the front link 96 and the rear link 98 are connected via the link pins 96A and 98A. As shown in FIGS. 9A and 9B, which are cross-sectional views taken along lines 9A-9A and 9B-9B in FIG. 8, the support plate portion 94A is curved downward on the inner side in the width direction. Inclined so that the inner end in the width direction is positioned inward in the width direction on the rear end side than the front end side, and it is a cam shape that converts a part of the outward load in the vehicle width direction to the rear downward load Yes. Thereby, the movable side support support member 94 is configured to be able to move from the holding position to the retracted position when the support plate portion 94A is pressed by the occupant moving outward in the width direction.

  Further, the vehicle seat 90 includes a lock mechanism 102 instead of the lock mechanism 34. As shown in a partially exploded view in FIG. 8, the lock mechanism 102 is a lock mechanism except that the lock portion 84A of the lock member 84 enters the lock hole 104 of the side frame 16A and locks the movable side support support member 94 in the holding position. The configuration is the same as 80. The lock member 84 is configured to engage the front side of the front link 96 located at the holding position and prevent the rearward tilt by causing the lock portion 84A to enter the lock hole 104.

  Also in the vehicle seat 90 described above, since the lock mechanism 102 that locks the movable side support support member 94 in the holding position by the outward acceleration in the width direction is provided, as in the vehicle seat 10, the side hold during the turning of the automobile or the like is provided. As a result, it is possible to secure the side hold property in a predetermined case where the property is required. In addition, the vehicle seat 90 has also been realized to ensure the side-holding property in the predetermined case with a simple structure that does not depend on the actuator.

  In addition, since the vehicle seat 90 includes the return spring 88 that biases the lock member 84 to the unlocked position, similarly to the vehicle seat 10, the movable side support support member 94 is locked to the holding position during normal use. There is no. For this reason, the vehicle seat 90 has also been realized to ensure the side-holding property in the predetermined case while improving usability during normal use such as getting on and off.

  In each of the above embodiments, the example in which the side support 22 Japanese invention of the seat cushion 12 is applied has been described. However, the present invention is not limited to this, and for example, protrudes forward on both sides of the backrest of the seat back 14. The present invention may be applied to the formed side support.

  The present invention is not limited to the above embodiments, and can be implemented with appropriate modifications. For example, instead of the lock member 84 in the third or fourth embodiment, a lock member provided in the arm member 56 and entering the lock hole 82 or the lock hole 104 may be provided. Alternatively, the lock member 38 or the like may be pressed by the leg L of the occupant P without reaching the arm member 56 or the like to reach the lock position.

  Furthermore, this invention is not limited to the vehicle seat mounted in a motor vehicle, It can apply to various vehicle seats.

It is front sectional drawing which expands and shows the principal part of the vehicle seat which concerns on the 1st Embodiment of this invention. 1 is a front view showing a schematic overall configuration of a vehicle seat according to a first embodiment of the present invention. It is a figure which shows the rock climate which comprises the vehicle seat which concerns on the 1st Embodiment of this invention, Comprising: (A) is a perspective view, (B) followed the 3B-3B line | wire of FIG. 3 (A). It is sectional drawing. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the vehicle seat which concerns on the 1st Embodiment of this invention, Comprising: (A) is front sectional drawing which shows the state at the time of straight running, (B) is front sectional drawing which shows the state at the time of turning driving | running | working, (C) is front sectional drawing which shows the state at the time of alighting. It is a figure which shows the vehicle seat which concerns on the 2nd Embodiment of this invention, Comprising: (A) is a top view which expands and shows a principal part typically, (B) expands a principal part typically FIG. It is a figure which shows typically a motion of the passenger | crew's leg seated on the vehicle seat which concerns on the 2nd Embodiment of this invention, Comprising: (A) is a top view, (B) is a front view. It is a figure which shows the vehicle seat which concerns on the 3rd Embodiment of this invention, Comprising: (A) is the front view which shows typically the principal part expanded, and (B) is sectional drawing of a locking mechanism. It is a perspective view which expands and shows typically the principal part of the vehicle seat which concerns on the 4th Embodiment of this invention. (A) is sectional drawing along the 9A-9A line of FIG. 8, (B) is sectional drawing along the 9B-9B line of FIG.

Explanation of symbols

10 Vehicle seat (vehicle seat)
12 Seat cushion 14 Seat back 22 Side support 26 Movable side support support member (side support support member)
32 Compression coil spring (biasing means)
38 Locking member 42 Weight part (moving force applying means)
46 Return spring (biasing means)
50/70/90 Vehicle seat 54/84 Lock member 56 Arm member 60/88 Return spring (biasing means)
74/94 Movable side support support member (side support support member)
78 ・ 100 Torsion coil spring (biasing means)

Claims (5)

A holding position that is provided on the side of the seat cushion or the seat back and holds the side support so as to protrude to the side of the seated person, and a retracted position opposite to the protruding side of the side support with respect to the holding position. A side support support member to obtain;
Biasing means for biasing the side support support member to the holding position and releasing the biased state of the side support support member to the holding position by a load greater than or equal to a predetermined value toward the retracted position;
A lock member that can take a lock release position that allows the side support support member to move to the retracted position, and a lock position that locks the side support support member to the holding position by engaging the side support support member;
A moving force applying means for moving the lock member from the unlock position to the lock position by a load greater than or equal to a predetermined value acting in the width direction of the seat cushion or seat back;
Vehicle seat equipped with.   The vehicle according to claim 1, wherein the moving force applying means moves the lock member from the unlock position to the lock position by acceleration acting outward in the width direction of the seat cushion or seat back. Sheet.   The moving force applying means includes an arm member that rotates about an axis along a protruding direction of the side support with respect to a seat support surface of the seat cushion or an upper body support surface of the seat back, and one end of the arm member with respect to the axis. 2. The side of the seat cushion or the seat back serves as a load input portion to which an outward load in the width direction acts, and the lock member is provided on the other end side of the front axis of the arm member. The vehicle seat described. The side support support member can take a holding position for holding the side support provided on the side portion of the seat cushion so as to protrude upward from the seating surface, and a retracted position below the holding position. It is made up of
4. The vehicle seat according to claim 1, wherein the lock member or the load input portion is disposed so as to be pressed by the leg of the seated person seated on the seat cushion when the leg moves sideways. .   The vehicle seat according to any one of claims 1 to 4, further comprising urging means for urging the lock member toward the unlocking position.

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