JP6523628B2 - Vehicle seat - Google Patents

Description

  The present invention divides a vehicle seat, particularly a seat cushion, into a cushion body and a movable side portion provided on the side of the seat surface of the cushion body, and the movable side portion is erected with respect to the cushion body. The present invention relates to a vehicle seat that can be moved up and down between the standing position and the lying down position.

  As the vehicle seat, for example, a vehicle seat provided with a lock mechanism for locking at least a movable side portion in an upright position is known (see Patent Document 1 below).

  And in this conventional automobile seat, by holding the movable side portion of the seat cushion normally at the upright position, the holdability of the occupant can be kept good, while the occupant gets in and out of the lower body on the seat cushion. When moving away to the side and getting off, the movable side portion in the standing state can be turned downward so as not to disturb the getting-off operation.

JP 2008-260326 A

  By the way, in the above-mentioned conventional car seat, the cushion frame which becomes the frame of the cushion main body is extended not less than the cushion main body, and the movable side portion is pivotally supported by the frame extension. The lock mechanism is interposed between the part and the movable side part. Therefore, not only the size of the cushion frame which is the frame of the cushion main body is increased, but also the movable side portion needs to be directly attached to the cushion main body (cushion frame) which is a large part. It is not easy to ensure accuracy, and when changing the shape, size, etc. of the movable side part due to model change, it is necessary to change the cushion body (cushion frame) itself, which is a large part, correspondingly. Change is not easy.

  The present invention has been proposed in view of the above, and it is an object of the present invention to provide a vehicle seat capable of solving the conventional problems with a simple structure.

In order to achieve the above object, the present invention divides the seat cushion into a cushion body and a movable side portion provided on the side of the seat surface of the cushion body, and raises the movable side portion with respect to the cushion body A cushion frame serving as a framework of the cushion body, the cushion frame being a component separate from the cushion frame, in a vehicle seat capable of performing a hoisting movement between the upright position and the reclined position from the upright position by combining the side frame, and pivotally supported so as to be able to pivot between an upright position and Fuku倒position before Symbol movable side part on its side frames between their side frames and movable side portion, the movable only set a lock mechanism which can lock the side portions at least in the upright position, at least a portion of the cushion frame is composed of a wire-shaped frame There are, of the wire-shaped frame, the first characterized in that the side frame portions exposed from the cushion body outer surface is fastened.

Further, according to the present invention, in addition to the first feature, a support wall portion for supporting a pivot support portion of the movable side portion to the side frame is integrally erected on the side frame; A second feature is that the support wall is fastened to a portion exposed from the cushion body outer surface.

The present invention, in addition to the first or second aspect, at least a portion of the support wall portion, a third feature to function as a contact with the pad position regulating portion in the pad portion of the cushion body Do.

Further, in the present invention, in addition to any one of the first to third features, the cushion frame is attached to a mounting wall portion continuously provided to the support wall portion, and a vehicle front side or a rear than a bottom plate frame of the movable side portion. A fourth feature is to be fastened at a position offset to the side.

Further, according to the present invention, in addition to any one of the first to fourth features, the movable side portion and the movable side portion are attached to the support wall portion and pivoted together with the movable side portion. A fifth feature is that a relief is formed to avoid interference with the member.

Further, according to the present invention, in addition to any one of the first to fifth features, the support wall portion has at least an enclosure wall portion surrounding a pivot support portion of the movable side portion to the side frame. As the sixth feature.

The present invention, in addition to the sixth feature of the enclosure wall of the support wall portion, and seventh aspect to be received in the recess formed in the outer portion of the pad portion of the cushion body .

Further, in addition to any one of the first to seventh features, the present invention holds the lock mechanism in the unlocked state when in operation, and automatically resets the lock mechanism to the locked state when in non-operation. An acceptable lock release holding mechanism is supported by the bottom plate frame of the movable side portion, and engaged with a part of the lock release holding mechanism when the movable side portion is pivoted downward in the operating state of the lock release holding member. An eighth feature is that a return member for switching the lock release holding mechanism to the inoperative state is projected on the side frame.

According to the first feature of the present invention, the seat cushion is divided into the cushion main body and the movable side portion, and the movable side portion is erected from the cushion main body, and a bowed down from the erected position. in vehicle seat attached undulating operably between a tilted position, the cushion frame as a skeleton of the cushion body, and its cushion frame by combining the side frame is another part, Symbol before on its side frame and pivotally supported so as to pivot between a movable side portion standing position and Fuku倒position, is between those side frame and the movable side portion, provided with a locking mechanism that can be locked in upright position at least a movable side portion Therefore, the movable side part is assembled together with the lock mechanism etc. on the side frame which is a separate part from the cushion frame which is the skeleton of the cushion main body. And be Rukoto them single subassembly, that is, can be handled as a sub-assembly. As a result, not only the cushion frame on the cushion body side can be miniaturized, but the movable side portion can be easily and quickly made to the cushion body simply by simply connecting the side frame of the above-described small assembly assembled in advance to the cushion frame. It can be assembled and can greatly contribute to the improvement of productivity. In addition, even when changing the shape, size, etc. of the movable side part by model change etc., it is only necessary to change the side frame which is a small part, and it is unnecessary or slight to change the cushion main body (cushion frame) which is a large part. It is possible to suppress such changes, and the response is easy. Moreover , at least a part of the cushion frame is constituted by the wire-like frame, and the side frame is fastened to the portion of the wire-like frame exposed from the cushion main body outer surface, so the wire-like frame is excellent in formability. Further, the side frame fastening portion in the cushion frame can be easily formed, and the selection freedom of the formation position can also be enhanced.

According to the second aspect of the present invention, the support wall portion for supporting the pivotal support portion of the movable side portion to the side frame is integrally erected on the side frame, and a portion of the cushion frame exposed from the cushion body outer surface Since the support wall portion is fastened to the support frame portion, the support wall portion for supporting the pivotal support portion of the movable side portion also serves as a fastening portion on the side frame side with respect to the cushion frame, thereby simplifying the structure.

According to the third feature of the present invention, at least a part of the support wall functions as a pad position restricting portion that abuts on the pad portion of the cushion main body, so that the support wall supporting the pivot portion of the movable side portion Will also serve as the pad regulation means, and the structure can be simplified accordingly.

According to the fourth feature of the present invention, the cushion frame is fastened to the mounting wall portion continuously provided to the support wall portion at a position offset to the vehicle front side or the rear side with respect to the bottom plate frame of the movable side portion. When performing the work of fastening the side frame to the cushion frame at the fastening portion, the movable side portion can be effectively prevented from becoming an obstacle, and the workability can be enhanced.

According to the fifth feature of the present invention, the support wall is formed with a movable side portion and a relief portion attached to the movable side portion to avoid interference with a member rotating together with the movable side portion. Thus, when the movable side portion is moved up and down, interference with the support wall can be suppressed.

According to the sixth aspect of the present invention, the support wall portion has an enclosure wall portion surrounding the shaft support portion to the side frame of the movable side portion, so that the shaft support portion is effectively reinforced by the enclosure wall portion and Can be protected.

According to the seventh feature of the present invention, since the surrounding wall of the support wall is accommodated in the recess formed on the outer side of the pad of the cushion main body, the support wall is the outer side of the cushion main This can contribute to the compactness of the sheet by avoiding large overhang.

According to the eighth aspect of the present invention, the movable side portion is a lock release holding mechanism that holds the lock mechanism in the lock release state when operating and allows the lock mechanism to automatically return to the lock operating state when not operating. Supported by the bottom plate frame, and when the movable side portion is pivoted downward in the operating state of the unlocking holding member, engages with a part of the unlocking holding mechanism to deactivate the unlocking holding mechanism Since the switching return member is projected on the side frame, the mechanism for automatically switching the unlocking holding mechanism to the inoperative state can be simplified, which can contribute to cost reduction.

It is a principal part perspective view of a seat for motor vehicles concerning one embodiment of the present invention, and while (A) shows the state where a movable side part is in a standing position, and (B) separates a movable side part from a cushion main part. Each shows a state in which a part of the cushion body is broken 2-2 line enlarged sectional view of FIG. 1 Partially broken side view seen from 3 arrow in FIG. 2 The bottom view seen from 4 arrow of FIG. 3 It is an important section longitudinal section (5-5 line sectional view of Drawing 4) of a lock mechanism in the state where a movable side part is in a standing position, and (A) shows a locked state and (B) shows an unlocked state. Show each An exploded perspective view of the main part of the lock mechanism It is operation | movement explanatory drawing of a lock release holding mechanism, Comprising: (A) shows the non-operation state of the lock release holding mechanism, (B) shows the state in the middle of the switching from the non-operation state of the lock release holding mechanism to an operation state. , (C) shows the operating state of the lock release holding mechanism It is operation | movement explanatory drawing corresponding to FIG. 2 which shows the relationship between the operation | movement of a movable side part, and a lock mechanism and a lock release holding mechanism, Comprising: (A) is a lock operating state of lock mechanism (non-operation of lock release holding mechanism) (B) is a state where the lock release mechanism is operated by releasing the lock release mechanism while the movable side part is in the upright position, and (C) is a minute when the movable side part is slightly lowered from the upright position. Inverted state (lock release holding mechanism remains activated) It is operation | movement explanatory drawing corresponding to FIG. 2 which shows the relationship between the operation | movement of a movable side part, and a lock mechanism and a lock release holding mechanism, Comprising: (D) further falls a movable side part from slightly inverted position and locks (E) Release the movable side from the occupant weight with the unlocking holding mechanism still in the inactive state, and (F) release the occupant's weight immediately after the release holding mechanism is switched to the inactive state. Indicates the state where the movable side part has automatically returned to the upright position (the unlocking holding mechanism remains in the non-operating state).

  Next, an embodiment of the present invention will be described based on an embodiment shown in the attached drawings. In the present specification, front, rear, left, and right refer to a four-wheeled vehicle as a vehicle to which the present invention is applied.

  First, in FIG. 1, a seat A according to the present embodiment is a rear seat for three occupants installed on the floor of a four-wheeled vehicle, and includes a seat cushion S for seating the waist of the occupant and the seat cushion S It comprises: a seat back SB standing upright from the rear end and supporting the back of the occupant.

  With reference to FIGS. 2 to 5 together, the seat cushion S is disposed on the cushion body Sm whose upper surface is a seat surface, and on the side of the seat surface of the cushion body Sm (in the illustrated example, on the left and right landing side) The cushioning body Sm is divided into a pair of movable side portions Ss, and each movable side portion Ss is erected from the cushioning body Sm, and is folded from the erecting position U. It is mounted so as to be able to rotate up and down between the lower position D and the lower position D. Further, between the cushion main body Sm and the movable side portion Ss, there is provided a lock mechanism L which can be switched between a lock operating state capable of locking the movable side portion Ss to the erected position U and an unlocked state not lockable.

  In the illustrated example, the movable side portion Ss is illustrated as being raised upward with respect to the cushion main body Sm when the movable side portion Ss is at the standing position U, but in the present invention, the movable side portion Ss is the standing position. When it is in U, it does not necessarily have to be protruded upward from the cushion main body Sm, and may be, for example, substantially the same height as the cushion main body Sm.

  The cushion body Sm is composed of a cushion frame Fm which is a skeleton of the cushion body, and a cushion body cushion pad 1 as a pad portion supported by the cushion frame Fm, and the surface of the cushion pad 1 is leather or synthetic It is covered with a leather skin 2. Further, side frames Fs, which are parts separate from the cushion frame Fm, are coupled to left and right end portions of the cushion frame Fm, and movable side portions Ss located above the side frame Fs are undulated in the side frame Fs. It is mounted as pivotable.

  The cushion frame Fm includes a plate-like frame (not shown) and a wire-like frame 5 coupled to the plate-like frame. The wire-like frame 5 is a rigid frame formed by bending a bar-like metal frame over a substantially entire area of the cushion main body Sm into a predetermined shape corresponding to the contour form. Be buried. Further, a part of the wire-like frame 5 is exposed from the left and right side surfaces of the cushion main body Sm, and the side frame Fs is detachably fastened to the exposed portions 5a and 5b. As described above, by forming at least a part of the cushion frame Fm with the wire-like frame 5 and fastening the side frame Fs to the portions 5a and 5b of the wire-like frame 5 exposed from the outer surface of the cushion body, The wire-shaped frame 5 has an advantage that the side frame fastening portion in the cushion frame Fm can be easily formed, and the selection freedom of the formation position can also be enhanced.

  Further, the movable side portion Ss is provided with a bottom plate frame B constituting a bottom wall of the movable side portion Ss and a cushion pad 3 for movable side portion fixedly supported on the bottom plate frame B. A reinforcing frame (not shown) which is a framework of the movable side portion Ss in cooperation with the bottom plate frame B is embedded. The surface of the cushion pad 3 is covered with a skin 4 made of leather or synthetic leather.

  The bottom plate frame B includes a bottom plate frame main body Bm consisting of a substantially triangular single plate corresponding to the bottom shape of the movable side portion Ss, and a substantially rectangular lock mechanism supported by welding onto the lower surface of the bottom plate frame main body Bm. It comprises a frame Bl. The lock mechanism support frame B1 has a two-piece structure including an upper frame plate 20 in which a downward flange portion 20f is integrally connected to the outer periphery and a lower frame plate 21 which is welded onto the lower surface of the upper frame plate 20. Configured

  In the side frame Fs, a bottom plate frame B of the movable side portion Ss is pivotally supported via a pivot 8 so that the movable side portion Ss can pivot between the upright position U and the reclined position D. The structure of the bearing portion will be described next.

  That is, on the upper surface of the side frame Fs, a substantially U-shaped support wall portion W is integrally erected in a plan view including the front and rear walls 6f and 6r and the intermediate wall 6m connecting the two integrally. The front and rear hinge walls 7f and 7r parallel to each other are integrally protruded from the middle wall 6m. The pivot shaft 8 is fixedly installed between the front and rear hinge walls 7f and 7r, and the pivot shaft 8 is the bottom plate frame B (in particular, upper and lower frame plates 20 and 21 constituting the lock mechanism support frame Bl). The bearing collar 22 is rotatably fitted and coupled to the extension plates 20a and 21a extending integrally from the side edge of the cushion body Sm. In the upper and lower frame plates 20 and 21, shallow ridges 23 for reinforcement are formed, which extend across the area of the extension plates 20a and 21a and the other area.

  Thus, the support wall portion W has an enclosure wall portion including the front and rear walls 6f, 6r and the intermediate wall 6m, which surrounds the side frame Fs pivoting portion of the movable side portion Ss. The bearing portion can be effectively reinforced and protected by the surrounding wall portions 6f, 6m and 6r. Moreover, the enclosure walls 6f, 6m, 6r are accommodated in the recess 1a of the lower surface opening formed on the outer surface of the cushion pad 1 of the cushion body Sm in the illustrated example, whereby the support wall W is the cushion body. The sheet S can be made compact by avoiding a large overhang of Sm on the outer side. In this case, at least a part of the surrounding wall portions 6f, 6m, 6r of the support wall portion W functions as a pad position regulating portion that abuts on the cushion pad 1 of the cushion main body Sm. The support wall portion W supporting the support portion also serves as the pad control means, and the structure can be simplified accordingly.

  Furthermore, parts of the support wall W (for example, the front and rear walls 6f and 6r of the enclosure wall) are attached to the movable side Ss and the movable side Ss, and components that rotate together with the movable side Ss (described later Notches 6fk and 6rk are formed to avoid interference with the lock release holding mechanism LL). As a result, there is no concern that the support wall W will be an obstacle when raising and lowering the movable side portion Ss, and the workability can be enhanced.

  Further, a part (the front wall 6 f in the illustrated example) of the support wall W is adjacent to one of the exposed portions 5 a of the wire-like frame 5 and fastened with a bolt b and a nut n. As described above, the support wall W supporting the side frame pivotally supporting portion of the movable side portion Ss is also used as the to-be-fastened portion to which the side frame Fs is to be fastened to the cushion frame Fm. It is possible.

  Further, a mounting wall 6rw extending backward is fixed to the rear wall 6r of the support wall W, and a second portion of the cushioning frame Sm exposed from the tip of the cushion frame Fm and the tip of the mounting wall 6rw. The bolt 5b is fastened by a bolt b and a nut n at a position offset from the bottom plate frame B of the movable side portion Ss to one side in the vehicle longitudinal direction (rear side in the illustrated example). By the offset effect of the fastening portion, when performing the work of fastening the side frame Fs to the cushion frame Fm, it is possible to effectively avoid the obstacle of the movable side portion Ss, and the workability is enhanced.

  Further, between the side frame Fs and the bottom plate frame B, a return spring 10 as biasing means for biasing the movable side portion Ss toward the standing position U is interposed. In the illustrated example, the return spring 10 is formed of a torsion coil spring that surrounds a spring support shaft 9 installed between the front and rear hinge walls 7f and 7r on the side of the pivot shaft 8. One end of the spring 10 is a bottom plate The extension plate portion Ba of the frame B is engaged, and the other end is engaged with one of the front and rear hinge walls 7f and 7r. Thus, the movable side portion Ss is resiliently held at the standing position U by the resilient force of the return spring 10 in its free state. As means for assisting the biasing force of the return spring 10, for example, at least one auxiliary spring (not shown) can be used as necessary, in which case each auxiliary spring comprises the side frame Fs and the bottom plate frame B. And the return spring 10 is interposed in parallel.

  By the way, between the side frame Fs and the bottom plate frame B, a lock mechanism L capable of locking the movable side portion Ss (bottom plate frame B) to the upright position U is interposed. Next, the configuration of the lock mechanism L will be described with reference to FIG. 6 and FIG. 7 together.

  The lock mechanism L is supported on the lock mechanism support frame Bl at a predetermined stroke, that is, a lock bar 12 slidably supported back and forth between a predetermined lock position (solid line in FIG. 4) and an unlocking position (dotted line in FIG. 4). And a pair of lock members 13 having a first engagement portion 13a engaged with the pair of fork-like lock portions 12a of the lock bar 12 and interlocked with the lock bar 12, and a second of the lock members 13 A pair of locking grooves 14 formed on the outer peripheral portion of the front and rear hinge walls 7f and 7r and the lock bar 12 are resiliently held on the lock position side (left side in FIG. 4) so as to be engageable with and disengageable from the engagement portion 13b , And a lock spring 15 as a holding member. A guide wall for slidingly guiding the lock bar 12 is provided on the lower frame plate 21 of the bottom plate frame B by cutting and raising a part of the lower frame plate 21 or the like. The locking groove 14 is formed of a wide first shallow groove 14a in the circumferential direction and a deep second groove 14b recessed in the bottom of one end of the first groove 14a.

  The lock member 13 is rotatably connected to and supported by the lock mechanism support frame B1 via the pivot shaft 16, and a lock operating position (solid line in FIG. 4, as shown in FIG. 4) in which the second engagement portion 13b rushes into the second groove 14b. A pivot 16 between FIG. 5 (A) and a lock inoperative position (see FIG. 4 chain line, FIG. 5 (B)) which can not be engaged with the second groove 14 b and stays in the first groove 14 a. It can rotate around. Then, the resilient force of the lock spring 15 always biases the lock member 13 to the lock operation position side (counterclockwise in FIG. 4) via the lock bar 12.

  Thus, the second engagement portion 13b of the lock member 13 is engaged with one end and the other end of the first groove portion 14a in the circumferential direction, whereby the rotation range of the lock member 13 is limited within a predetermined range. The range of undulation rotation of the movable side portion Ss is limited. Further, the lock member 13 is arranged to face the second groove portion 14b only when the movable side portion Ss is at the upright position U, and the lock member 13 can be pivoted to the lock operation position side. Become. Then, when the lock member 13 is in the lock operation position and the second engagement portion 13b is engaged with the second groove portion 14b, the movable side portion Ss is at the upright position U by the rotation restriction of the lock member 13. It is locked.

  In the bottom plate frame B of the movable side portion Ss, the lock mechanism L is switched and held in the unlocked state against the lock spring 15 of the lock mechanism L when actuated, and when the lock mechanism L is not actuated, the lock mechanism L is resilient. An unlocking holding mechanism LL is provided that allows the force to automatically return to the locked state. Next, the configuration of the lock release holding mechanism LL will be described.

  The lock release holding mechanism LL is operatively connected to the lock mechanism L to switch and hold the lock mechanism L in the lock release state (that is, the state in which the second engagement portion 13b of the lock member 13 is separated from the second groove portion 14b). Position (FIG. 7 (C)) and non-operation to allow the lock mechanism L to automatically return to the lock operation state (ie, the state in which the second engagement portion 13b of the lock member 13 is engaged with the second groove portion 14b) When the lock release mechanism 31 is interlocked with the lock mechanism L and the lock mechanism L is in the lock operation state, the lock release holding member 31 which can rotate between the position (FIG. 7A) and the lock release mechanism 31 (see FIG. ), And the link mechanism 33 located in the second operation position (FIG. 7C) when in the unlocked position, and an operation connected to the link mechanism 33 for arbitrarily operating the unlocking holding mechanism LL. With the input unit And an operation lever 34 of Te. The lock release holding member 31 is pivotally supported by the U-shaped first bracket 30 fixed to the bottom plate frame B of the movable side portion Ss, and the link mechanism 33 includes the first bracket 30 and the lock bar 12. And is pivotally connected to a second bracket 32 which is fixed to the housing.

  That is, the lock release holding member 31 is pivotally supported by one side wall extension of the first bracket 30 via a pivot shaft 29 about a horizontal axis, and a vertical through the rotation axis A connecting portion with the holding spring 35 is disposed in the first half 31A on one side of the front and rear sides across the face, and a second half 31B on the other side of the front and rear sides is engaged with a first and a second engagement described later. Joints 36a and 36b are provided. The spring fixing end of the holding spring 35 is connected to the side wall extension of the first bracket 30, and resiliently biases the unlocking holding member 31 in a predetermined direction (clockwise in FIG. 7).

  The link mechanism 33 has first and second brackets 30 and 32 whose base ends are pivotally supported by the first and second brackets 30 and 32 so as to be rotatable about horizontal axes via pivots 27 and 28, respectively. Two links 37 and 38 are provided. The distal ends of the links 37 and 38 are pivotably connected to each other about a horizontal axis via a pivot 26. At the axial end of the pivot 26, the first and second engagements of the unlocking holding member 31 are performed. The switching holding pin 39 as an engaged portion which can be engaged with the joint portions 36a and 36b is integrally provided.

  The switching holding pin 39 engages with the first engaging portion 36a of the unlocking holding member 31 when the link mechanism 33 is in the first operating position (FIG. 7A), thereby releasing the unlocking holding mechanism. LL is held in the inoperative state, and is engaged with the second engagement portion 36b of the lock release holding member 31 when the link mechanism 33 is in the second operation position (FIG. 7C) to hold the lock release. Hold the mechanism LL in the operating state. Further, the engagement state of the switching holding pin 39 with respect to the first and second engaging portions 36 a and 36 b can be held by the elastic force of the holding spring 35.

  The first link 37 can be pivoted back and forth around the axis of the pivot 27 by pivotably connecting and supporting the pivot 27 integrally coupled with the base end of the first link 37 to the first bracket 30. The base of the operation lever 34 is coupled to the pivot shaft 27 so as to be integrally pivotable. When the lock mechanism L is in the lock operation state shown by the solid line in FIG. 4 and in FIGS. 5 (A) and 7 (A), the operating lever 34 is resilient force of the holding spring 35 and the lock spring 15. Manually operating the link mechanism 33 from the first operating position (FIG. 7 (A)) to the second operating position (FIG. 7 (C)) from the intermediate position of FIG. 7 (B). it can. In addition, the recessed part which receives the operation part of the control lever 34 is formed in the outer surface of movable side part Ss.

  Furthermore, in the second half 31B of the lock release holding member 31, the switch holding pin 39 slides from one side to the other at an intermediate position between the first and second engaging portions 36a and 36b. A side view chevron-shaped guide portion 36g for guiding is formed. The guide portion 36g has a switch top 36gt in which the top is rounded and raised in the middle of the guide 36g, and the switch support pin 39 passes over the switch top 36gt. While moving from any one of the first and second engaging portions 36a and 36b to the other, the biasing state of the holding spring 35 is engaged, and the switching holding pin 39 is engaged with one of the first and second engaging portions 36a and 36b. It is possible to switch to a mode in which the switching holding pin 39 is engaged with and held by the other of the first and second engaging portions 36a and 36b from the joint holding mode.

  Furthermore, between the side frame Fs and the lock release holding mechanism LL, when the lock release holding mechanism LL is in the operating state, the lock release holding mechanism LL is not operated according to the downward rotation of the movable side portion Ss. A return mechanism R is provided to switch to.

  The return mechanism R includes a return member 50 protruding upward from the side frame Fs and an engagement arm connected to the lower end of the second half 31B of the lock release holding member 31 corresponding to the return member 50. It consists of 31Ba. The return member 50 is rotated downward by a predetermined amount while the movable side portion Ss is rotated downward with the lock release holding member 31 in the operating position (FIG. 7C). When it reaches, it abuts on the engaging arm 31 Ba of the lock release holding member 31 to forcibly rotate the lock release holding member 31 to the inoperative position (FIG. 7A). Further, the return member 50 is formed with a smoothly curved escape portion 50a to avoid interference with the lock release holding member 31. By specially providing the escape portion 50a, the engagement arm 31Ba of the lock release holding member 31 is formed. In the process in which the movable side portion Ss is further rotated downward after engagement with the return member 50, mutual interference between the lock release holding member 31 and the return member 50 can be avoided without difficulty.

  Although the return member 50 of the return mechanism R is shown provided on the side frame Fs in the illustrated example, the return member may be provided on a fixing member other than the side frame Fs, for example, a vehicle body frame.

  In addition, on both right and left end portions of the cushion main body Sm, a flexible cover 60 (see FIG. 1A) that covers the lock mechanism L, the lock release holding mechanism LL, the side frame Fs and the like just under the movable side portion Ss. See). Note that, instead of such a flexible cover 60, the lock mechanism L, the lock release holding mechanism LL, the side, etc. may be provided by another suitable covering means, for example, a cover body erected on a floor frame (for example, side sill) of the vehicle body. The frame Fs or the like may be covered.

  Next, the operation of this embodiment will be described. In the normal use state of the seat A, as shown in FIG. 1A, FIG. 8A, etc., the movable side portion Ss of the seat cushion S is at the standing position U slightly raised from the upper surface of the cushion main body Sm The standing posture of the movable side portion Ss is held by the lock mechanism L in the lock operation state. Therefore, the movable side portion Ss in the upright state enhances the holdability of the occupant sitting on the seat cushion S. In the lock operation state, as shown by the solid line in FIG. 4, the lock bar 12 resiliently urged toward the lock position by the lock spring 15 holds the lock member 13 in the engagement position with the second groove 14b. Thus, the movable side portion Ss (bottom plate frame B) is held by being rotationally restricted. Further, in this lock operation state, the lock release holding mechanism LL is in the non-operation state, that is, the position shown in FIG. 7A, and the switching holding pin 39 of the link mechanism 33 is the first engagement of the lock release holding member 31. The engagement portion 36a is engaged and held.

  From such a state, when the occupant sitting on the seat cushion S is going to get off, first, the control lever 34 and thus the link member 37 are manually turned by a predetermined angle. From this, the link mechanism 33 of the lock release holding mechanism LL is displaced to the state of (C) through FIG. 7B, and at this time, the switching holding pin 39 resists the elastic force of the holding spring 35 and the first From the engaging portion 36a through the guide portion 36g, it slides to the second engaging portion 36b, and at that time, the lock release holding member 31 pivots clockwise in FIG. At the same time, the lock bar 12 is pulled to the unlocking position against the elastic force of the lock spring 15, and the locking member 13 interlocked with the pulling is pivoted to the unlocking position (dotted line in FIG. 4). As shown in (B), it is separated from the second groove 14 b of the locking groove 14. Thus, even when the movable side portion Ss is at the standing position U, the lock mechanism L is in the unlocked state, and the unlocked state is held by the unlocking holding mechanism LL. This state is shown in FIG. 8 (B).

  Next, from this state, when the occupant dismounts, the weight acts on the movable side portion Ss, whereby the movable side portion Ss gradually rotates downward, as shown in FIG. 8 (C) to FIG. 9 (D). The lock release holding mechanism LL switches from the operating state to the non-operating state when it slightly falls as shown in FIG. That is, when the movable side portion Ss is pivoted downward by a predetermined angle (ie, to a predetermined pivoting position before the fall position D), the engaging arm 31Ba of the unlocking holding member 31 engages with the return member 50 of the return mechanism R. Match. In conjunction with the engagement, the unlocking holding member 31 is turned counterclockwise in FIG. 7 against the elastic force of the holding spring 35, and the switching holding pin 39 is engaged in the second engagement reversely to the previous step. It slides to the first engagement portion 36a from the portion 36b through the guide portion 36g, and returns to the position of FIG. 7 (A). In this state, the lock release from the lock release holding mechanism LL to the lock bar 12 is released, so the lock bar 12 tries to automatically return to the lock position side by the elastic force of the lock spring 15, and the lock member interlocks with this. 13 also attempts to automatically return to the lock position side (i.e., the position engaged with the second groove 14b). However, at this time, since the second engaging portion 13b of the lock member 13 is in sliding contact with the first groove 14a but not in the position opposed to the second groove 14b, it can not engage with the second groove 14b.

  Such an inoperative state of the lock release holding mechanism LL continues until the occupant passes the movable side portion Ss and the weight does not act on the movable side portion Ss, and the downward rotation of the movable side portion Ss is performed until then. Is acceptable (FIG. 9 (E)).

  Next, when the occupant passes the movable side portion Ss and the weight does not act on the movable side portion Ss, the movable side portion Ss is automatically operated by the resilient force of the return spring 10 as shown in FIG. The lock mechanism L is in the lock operation state, ie, the second engagement portion 13b of the lock member 13 is engaged with the second groove 14b at the same time as it reaches the upright position U. Automatically return to

  In the embodiment described above, the movable side portion Ss is assembled together with the lock mechanism L, the lock release holding mechanism LL, and the like on the side frame Fs which is a separate component from the cushion frame Fm which is the framework of the cushion main body Sm. Can be treated as a single subassembly or subassembly. Therefore, not only can the cushion frame Fm on the cushion main body Sm side be miniaturized, but the movable side portion Ss can be cushioned simply by simply connecting the side frame Fs of the above-described subassembly assembled in another line to the cushion frame Fm. As it is possible to assemble the main body Sm easily, quickly and accurately, productivity improvement and cost reduction can be achieved. Further, even when changing the shape, size, etc. of the movable side portion Ss due to model change etc., it is only necessary to change the side frame Fs which is a small part, and change the cushion body Sm including the cushion frame Fm which is a large part. Can be reduced to unnecessary or slight changes, which makes it easier to cope with the cost savings.

  In the present embodiment, the lock release mechanism LL is switched to and held in the lock release state at the time of operation, and the lock release holding mechanism LL which permits the lock mechanism L to automatically return to the lock operation state at the time of non-operation A return mechanism R is specially provided to switch the lock release holding mechanism LL to the non-operating state according to the downward rotation of the movable side portion Ss when the release holding mechanism LL is activated. Therefore, by normally holding the movable side portion Ss at the upright position U by the lock mechanism L, the holdability of the occupant can be favorably maintained, and when the user gets off, the operating lever 34 is manually operated to hold the unlocking in advance. By operating the mechanism LL, the lock mechanism L can be switched and held in the unlocked state against the lock spring 15 as the holding member, and from this state, the movable side portion Ss is resisted by the weight of the occupant against the return spring 10 The downward rotation can be made without difficulty, and by the downward rotation, the movable side portion Ss can be prevented from becoming an obstacle to the getting-off operation, enabling smooth getting-off.

  Moreover, since the return mechanism R switches the lock release holding mechanism LL to the inoperative state according to the downward rotation of the movable side portion Ss, the movable side portion Ss released from the weight of the occupant is a spring of the return spring 10 after getting off. The movable side portion Ss is automatically returned to the upright position U and locked since the lock mechanism L is in the lock operation state when it is automatically pivoted upward by the force and reaches the upright position U. And good operability. In addition, since the fold-down holding lock mechanism for locking the movable side portion Ss to the fold-down position D can be omitted, the sheet structure can be simplified accordingly.

  In particular, in the present embodiment, when the movable side portion Ss is pivoted downward from the upright position U at the time of getting off, the lock release holding member 31 of the lock release holding mechanism LL in the operating state and the return member 50 of the return mechanism R Since the lock release holding mechanism LL can be mechanically interlocked with the downward rotation of the movable side portion Ss and can be switched to the inoperative state only by mechanical engagement, the switching structure is simple, The switching operation is performed reliably.

  Moreover, in the present embodiment, the switching holding pin 39, which is the engaged portion of the link mechanism 33 interlocked with the lock mechanism L of the lock release holding mechanism LL, comprises the first and second engaging portions of the lock release holding member 31. The lock release holding mechanism LL can be properly held in the activated state and the inactivated state respectively by the simple configuration of selectively engaging the members 36a and 36b. Moreover, since the lock release holding member 31 is provided with a guide portion 36g for guiding the engagement portion of the link mechanism to move from one of the first and second engagement portions 36a and 36b to the other, The lock release holding mechanism can be switched smoothly and smoothly between the operating state and the non-operating state.

  Further, the lock release holding member 31 holds the lock release holding member 31 so as to hold the engagement state of the first and second engagement portions 36a and 36b thereof with the switching hold pins 39 respectively. The spring 35 is connected, and the guide portion 36g guides the holding mode of the holding spring 35 while the switching holding pin 39 moves from one of the first and second engaging portions 36a and 36b to the other, From the aspect in which the switching holding pin 39 is engaged with and held by one of the first and second engaging parts 36a and 36b, the switching holding pin 39 is engaged with and held by the other of the first and second engaging parts 36a and 36b Since the switching top portion 36 gt is switched, the single holding spring 35 can hold the engagement state of the first and second engaging portions 36 a and 36 b with the switching holding pin 39 respectively, and hence the lock release with a simple structure. Holding mechanism 31 activated and not The respective accurately be held in a dynamic state.

  Furthermore, the holding spring 35 is disposed on one side of a vertical plane passing through the pivot shaft 29 of the lock release holding member 31, and the first and second engagement portions 36a and 36b and the guide portion 36g are disposed on the other side. Therefore, the lock release holding mechanism LL can be configured compactly while avoiding mutual interference between the holding spring 35 and the link mechanism 33 without difficulty.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various embodiments are possible within the scope of the present invention.

  For example, while the vehicle seat of the present invention is applied to the rear seats of four front and rear rows of four-wheeled vehicles in the above embodiment, the front seat and three front and rear rows of minivan type automobiles are shown in the present invention. It may be applied to the sheet. The vehicle on which the seat is mounted may be a four-wheeled vehicle, a three-wheeled vehicle, a bus, a truck, a railway vehicle, an aircraft, etc.

  In the above embodiment, the left and right movable side portions Ss capable of being undulated are disposed adjacent to the left and right sides (the entrance and exit sides) of the cushion main body Sm of the rear seat A. The movable side portions Ss may be disposed inward in the vehicle width direction on the left and right center sides of the cushion main body Sm, that is, on the left and right seating surfaces. In this case, the movable side portions Ss are brought down. There is an advantage that the lateral movement of the occupant between the left and right seat surfaces can be smoothly performed without being disturbed by the movable side portion Ss. In addition, when the present invention is applied to a front seat for one person, at least one of the left and right sides (ingress and exit sides) and the other (inward direction in the vehicle width direction) of the seat surface of the cushion main body Sm is movable side portion Ss. Is provided.

  In the embodiment described above, the operation release unit for operating the lock release holding mechanism LL arbitrarily uses the operation lever 34 for direct manual operation input by manual (manual) operation. The operation input unit may be configured by switch means capable of generating power with an actuator such as an electric motor and outputting an operation command signal to the actuator.

  Further, in the embodiment, the return mechanism R that switches the lock release holding mechanism LL in the operating state to the non-operating state mechanically interlocks with the downward rotation of the movable side portion Ss to deactivate the lock release holding mechanism LL. In the present invention, the lock release holding mechanism LL is forcibly switched to the non-operating state, but the actuator such as the electric motor or the like and the movable side portion Ss are rotated downward. The lock release holding mechanism LL may be switched to the inoperative state by electrically interlocking with the downward rotation of the movable side portion Ss using detection means such as a sensor to be detected.

  In the above embodiment, the seat A includes only the lock mechanism L for locking the movable side portion Ss at the erected position U as a lock mechanism for the movable side portion Ss interposed between the side frame Fs and the movable side portion Ss. However, the present invention is also applicable to a seat provided with a lock mechanism for locking the movable side portion Ss at the fall-down position D in addition to the lock mechanism L for holding the upright position.

A: Seat B: Bottom plate frame Fm: Cushion frame Fs: Side frame L: Locking mechanism LL: Unlocking holding mechanism S: · · · Seat cushion Sm · · · · Cushion body Ss · · · · · · · Movable side portion U · · · standing position D · · · · down position R · · · · return mechanism W · · · Support wall part 1 ・ ・ ・ ・ ・ Cushion pad for cushion body (pad part)
1a · · · · recess 5 ----- wire-like frame 5a, 5b · · wire-shaped frame exposed portion 6f · · · · front wall (a part of the support wall portion, enclosing wall portion)
6 m ・ ・ ・ ・ Intermediate wall (part of support wall, enclosure wall)
6r · · · · · · Back wall (part of support wall, enclosure wall)
6 rw ····· Mounting wall 6 fk, 6 rk · · · Relief portion 8 ··· Pivot (pivot support)
50 ・ ・ ・ Return member

Claims (8)

The seat cushion (S) is divided into a cushion body (Sm) and a movable side portion (Ss) provided on the side of the seat surface of the cushion body (Sm), and the movable side portion (Ss) is In a vehicle seat which can be moved up and down between a standing position (U) standing up against Sm) and a lying position (D) lying down from the standing position (U),
A cushion frame (Fm) as a frame of the cushion body (Sm), and its cushion frame (Fm) by combining the side frames (Fs) which is another component, before Symbol movable thereon side frames (Fs) The side portion (Ss) is pivotally supported (8 ) so that it can be pivoted between the upright position (U) and the reclined position (D), and between the side frame (Fs) and the movable side portion (Ss) A lock mechanism (L) capable of locking the movable side portion (Ss) at least in the standing position (U) ;
At least a part of the cushion frame (Fm) is constituted by a wire-like frame (5), and the wire-like frame (5) is exposed to the portions (5a, 5b) exposed from the outer surface of the cushion body (Sm). A vehicle seat characterized in that a side frame (Fs) is fastened . A support wall (W) for supporting a pivotally supporting portion of the movable side portion (Ss) to the side frame (Fs) is integrally erected on the side frame (Fs), and the cushion frame (Fm) The vehicle seat according to claim 1, characterized in that the support wall (W) is fastened to portions (5a, 5b) exposed from the cushion body (Sm) outer surface. The at least one portion (6f, 6m, 6r) of the support wall (W) functions as a pad position restricting portion that abuts on the pad portion (1) of the cushion main body (Sm). The vehicle seat according to 1 or 2 . A position where the cushion frame (Fm) is offset from the bottom plate frame (B) of the movable side portion (Ss) to the front side or the rear side of the movable side portion (Ss) on the mounting wall (6rw) connected to the support wall (W) The vehicle seat according to any one of claims 1 to 3 , wherein the vehicle seat is fastened. In the support wall (W), the movable side portion (Ss) and a relief portion attached to the movable side portion (Ss) to avoid interference with a member rotating together with the movable side portion (Ss) (6fk, 6rk) characterized in that is formed, vehicle seat according to any one of claims 1-4. The support wall portion (W) has at least an enclosure wall portion (6f, 6m, 6r) surrounding a pivot support portion of the movable side portion (Ss) to the side frame (Fs). The vehicle seat according to any one of claims 1 to 5 . The surrounding wall portion (6f, 6m, 6r) of the supporting wall portion (W) is accommodated in a recess (1a) formed in the outer side portion of the pad portion (1) of the cushion main body (Sm) The vehicle seat according to claim 6 , which is assumed to be. The movable side portion is a lock release holding mechanism (LL) that holds the lock mechanism (L) in the unlocked state when operating and allows the lock mechanism (L) to automatically return to the locked state when not operating. It is supported by the bottom plate frame (B) of (Ss), and when the movable side portion (Ss) is turned downward in the operating state of the lock release holding member, with a part of the lock release holding mechanism (LL) engage, characterized in that said lock release retaining mechanism returning member switches the (LL) in a non-operating state (50) is projected on the side frames (Fs), claim 1-7 The vehicle seat according to item 1.

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