JP2007196720A - Vehicle seat lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat lock device capable of simplifying and miniaturizing its configuration. <P>SOLUTION: A hook member 8 which is pivotably attached by a pivot 12 between a first base member 7 and a second base member 11, and engaged with a striker on a vehicle body side advancing in striker advancing grooves 71, 111 formed in first and second base members 7, 12, and a sensing member 10 which is pivotably attached by other pivot 16 directed in the same direction as the pivot 12, held at a waiting position when the striker is not engaged with an engagement groove 81 of the hook member 8, and abutted on the striker by the engagement of the striker with the engagement groove 81 to be displaceable from the waiting position to a detecting position are arranged. The hook member 8 and the sensing member 10 are arranged in an overlapping manner along the axial direction of each axis. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat lock device for holding a seat back supported by a vehicle body so as to be able to rise and fall in an upright position.

  2. Description of the Related Art Conventionally, a vehicle seat lock device includes a hook member that is attached to a seat back and that can be engaged with a striker on the vehicle body side, and an open lever that is linked to an operation knob disposed on the seat back. Based on this operation, the open lever is operated, and by this operation, the hook member is moved in the unlocking direction to be detached from the striker, so that the seat back can be moved from the standing position to the lying position. (For example, refer to Patent Document 1).

In some cases, when the seat back is used, an occupant can confirm whether the striker is engaged with the hook member by visually recognizing the position of the operation knob.
JP 2001-130295 A

  However, in the conventional vehicle seat lock device as described above, when a configuration that enables detection of whether or not the striker is engaged with the hook member is added to the configuration described in Patent Literature 1, In addition to increasing the complexity of the apparatus, the apparatus itself may be increased in size and it may be difficult to place the apparatus in a narrow accommodation space in the seat back.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a vehicle seat lock device that can be simplified and downsized.

According to the present invention, the above problem is solved as follows.
(1) In a vehicle seat lock device capable of holding a seat back supported by a vehicle body so as to be able to rise and fall in a standing position, a first base member fixed to the seat back, and the first base member A second base member fixed to be opposed to the first base member, and a striker entering groove provided on the first and second base members and pivotally mounted between the first base member and the second base member. A hook member that can be engaged with a striker on the vehicle body side that enters the vehicle, and a pivot member that is pivotally mounted between the first base member and the second base member by another pivot member that faces in the same direction as the pivot shaft, and the striker is When not engaged with the engaging groove of the hook member, the hook member is held at the standby position, and when the striker engages with the engaging groove, the striker comes into contact with the detection position from the standby position. And a position capable of sensing member, placing said hook member and the sensing member so as to overlap in the axial direction of the pivot together.

(2) In the above item (1), the hook member is disposed on the side close to the vehicle body side on which the striker is fixed.

(3) In the above item (1) or (2), an operating means whose position can be displaced based on the displacement of the sensing member is attached to the first base member or the second base member.

(4) In the above-mentioned item (3), an action part that operates between the first base member and the second base member based on the operating means and can displace the hook member to the unlocking position where the hook member is released from the striker. An open lever is disposed, and the action portion is interposed between the hook member and the base plate.

According to the present invention, the following effects can be obtained.
(A) According to the invention described in claim 1, by arranging the hook member and the sensing member so as to overlap each other along the axial direction of each pivot, the vertical dimension of the device itself can be shortened, Arrangement in a narrow storage space in the seat back is possible.

(B) According to the invention of claim 2, the length of the striker can be shortened by arranging the hook member on the side close to the vehicle body side on which the striker is fixed. As a result, the deformation of the striker is suppressed and the lock strength can be improved.

(C) According to the invention described in claim 3, by attaching the operation means to the first base member or the second base member, the operation means and the sensing member can be easily linked and the operation means. And the dimensional accuracy between the sensing members can be increased, and the displacement of the sensing members can be reliably transmitted to the operating means.

(D) According to the invention described in claim 4, the vertical dimension of the device itself can be further shortened, and the arrangement in a narrow storage space in the seat back becomes more possible.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. 1 is a perspective view of a rear seat to which the present invention is applied, FIG. 2 is an exploded perspective view of a lock assembly, FIG. 3 is a perspective view of the lock assembly in a temporarily assembled state, and FIG. 4 is a lock assembly as viewed obliquely from the rear. FIG. 5 is a rear view of the lock assembly, FIG. 6 is a side view of the lock assembly, and FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 2, 3, 5, and 6, the operating means is omitted for the sake of simplicity.

  In the following description, the diagonally lower right in FIGS. 1 to 3, the diagonally upper left in FIG. 4 is “front”, the diagonally upper left in FIGS. 1 to 3, and the diagonally lower right in FIG. 1 to 3 and the right side in FIG. 4 are “outdoors”, the right upper side in FIGS. 1 to 3 and the left in FIG.

  As shown in FIG. 1, the rear seat (1) is raised in the front-rear direction by a seat cushion (2) installed on the vehicle floor and a hinge shaft (not shown) facing the left-right direction at the rear end of the seat cushion (2). And a seat back (3) supported in a tiltable manner.

  The seat back (3) is connected to a metal striker (5) fixed to the vehicle body panel side by a lock assembly (4) mounted on the lower side of the shoulder on the side close to the vehicle body panel (outside). As a result, the shoulder portion of the seat back (3) can be held at the first standing position shown by a solid line in FIG. 1 and the second standing position shown by a two-dot chain line inclined backward from the first standing position. Based on the operation of the operating means (6) provided in the above, it is possible to move to the lying position indicated by the two-dot chain line that falls forward.

  The striker (5) has a first engagement shaft (51) on the front side facing the indoor side and a first engagement shaft on the rear side on a base member (53) fixed to the vehicle body panel facing the side portion of the seat back (3). It is formed by fixing a substantially U-shaped engagement rod (54) having two engagement shafts (52) in a plan view.

  The lock assembly (4) includes a metal first base member (7) fixed to a seat frame (31) (see FIG. 4) in the seat back (3) by bolts (not shown), and a first base member. A metal second base member (11) fixed so as to be opposed to the side surface facing the outdoor side of (7). The first and second engaging shafts (51) and (52) of the striker (5) are located rearward when the seat back (3) is erected at the substantially central portion of the first and second base members (7) and (11). Strike entry grooves (71) and (111) in the front-rear direction that can be entered from are provided respectively.

  The seating space between the first base member (7) and the second base member (11) is engaged with the first or second engagement shaft (51) (52) of the striker (5), so that the seat The base material for holding the back (3) in the first or second standing position is a metal hook member (8), and a synthetic resin open lever (9) that operates based on the operation of the operating means (6). ) And a sensing member (10) made of a synthetic resin whose position can be displaced according to the engagement relationship between the striker (5) and the hook member (8).

  An operating means (6) and a bell crank (23) are arranged on a metal mounting bracket (43) fixed to the upper part of the first base member (7). The mounting bracket (43) may be formed integrally with the first base member (7). Further, the operating means (6) may be assembled on the second base member (11) side.

  As shown mainly in FIG. 4, above the opening side of the striker entry grooves (71) and (111) in the first and second base members (7) and (11), there are bolts (18) that form fixing means facing forward. A first fixing piece (73) and a second fixing piece (112) that are coupled to each other are provided.

  As shown in FIG. 7, the first fixing piece (73) is formed with a burring (74) protruding in a cylindrical shape rearward (downward in FIG. 7). On the inner peripheral surface of the burring (74), a female screw to which the bolt (18) can be screwed is screwed.

  A fitting hole (113) into which the burring (74) is fitted is formed in the second fixing piece (112) superimposed on the rear surface of the first fixing piece (73).

  When the first base member (7) and the second base member (11) are coupled to each other, the burring (74) of the first fixed piece (73) is inserted into the fitting hole (113) of the second fixed piece (112). ). In this state, the bolt (18) is screwed into the burring (74) from the rear to be fastened. Thereby, as shown in FIG. 7, the second fixed piece (112) is sandwiched between the head (181) of the bolt (18) and the first fixed piece (73). Thus, the first and second base members (7) and (11) are connected to the opening side of the striker entry grooves (71) and (111) to each other, so that a large load is applied to the seat back (3). The deformation of the 1, 2 base members (7) and (11) can be effectively suppressed. As a result, deformation of the hook member (8) can be suppressed and the lock strength of the lock assembly (4) can be improved.

  The first base member (7) and the second base member (11) are joined by an open lever (9), a sensing member (10), a bell crank (23), etc. on the first base member (7) side. Also, it is performed after the hook members (8) and the like are assembled on the second base member (11) side.

  8 is a longitudinal sectional view taken along line VIII-VIII in FIG. 6, FIG. 9 is a transverse sectional view taken along line IX-IX in FIG. 6, and FIG. 10 is an enlarged view of the main part of the hook member (8). 11 to 15 are operation explanatory diagrams for explaining the operation of the main part.

  11 to 15 show the operation means (6), the bell crank (23), the hook member (8), the open lever (9), and the sensing member (10) on the same surface for convenience of explanation. Accordingly, in the figure, in the operating means (6) and the bell crank (23), the front side of the drawing is "rear" and the rear side of the drawing is "front", and the hook member (8), open lever (9) and sensing member ( In 10), the left side of the drawing is “rear” and the right side of the drawing is “front”.

  The hook member (8) is subjected to synthetic resin molding (molding for covering the outer peripheral surface of the metal hook member (8) with a synthetic resin material) on the outer peripheral surface, and the pivot portion (88) forming the base is provided. The first pivot (12) facing left and right is pivotally mounted in the vicinity of the back of the striker entry groove (111) in the second base member (11) so as to be swingable in the vertical direction and wound around the first pivot (12). It is urged | biased to the engagement direction (downward) by the mounted 1st spring (13). The position of the first pivot (12) is set on an extension line of the movement locus (L) of the striker (5).

  As shown mainly in FIG. 6, one end (131) of the first spring (13) is locked to the hook member (8), and the other end (132) is the front portion of the second base member (11). It is latched by the hook part (114) provided in the. As shown in FIGS. 8 and 9, the first pivot (12) has an enlarged diameter portion (between the first base member (7) and the second base member (11)) at the center in the axial direction ( 121).

  The lower part of the hook member (8) closer to the tip end portion is provided with a first engagement groove that opens downwardly so as to be selectively engageable with the first and second engagement shafts (51) and (52) of the striker (5). (81) is provided, and a second engagement groove (82) into which the first engagement shaft (51) can be loosely fitted is provided on the side closer to the base. A first arm portion (84) having an inclined edge (83) at the rear edge is provided on the front side of the first engagement groove (81) in the hook member (8), and the first engagement groove ( 81) and a second engagement groove (82) are provided with a second arm portion (85) projecting downward from the first arm portion (84). Furthermore, the side surface of the hook member (8) is provided with a projecting shaft (86) projecting toward the indoor side.

  When the hook member (8) is not engaged with the striker (5) (when the seat back (3) is in the lying down position), the hook member (8) is held at a substantially horizontal standby position (see FIGS. 6 and 11). When the first engagement shaft (51) or the second engagement shaft (52) of the striker (5) is engaged with the one engagement groove (81) (the seat back (3) is in the first standing position or the second 2 is held at an upright position), and is held at an engagement position (see FIG. 12 or FIG. 15) slightly rotated upward from the standby position, and a first operation position described later of the operation means (6). Based on the operation to (C), the first engagement shaft (51) is rotated only backward from the first engagement groove (81) by rotating in the unlocking direction (clockwise in FIGS. 6, 11 to 15). Displacement to the detachable first stage unlocking position (see FIG. 13), and further, the first stage unlocking based on the operation of the operating means (6) to the second operating position (D) described later. The second-stage unlocking position that allows the first engagement shaft (51) to enter the second engagement groove (82) from the first engagement groove (81) (see FIG. 14) Can be displaced.

  When the seat back (3) is held in the first upright position, as shown in FIG. 12, the first engagement shaft (51) of the striker (5) is connected to the first hook member (8). When engaged with the engagement groove (81) and also held in the second standing position, as shown in FIG. 15, the second engagement shaft (52) is moved to the first engagement groove (82). ) And the first engagement shaft (51) is loosely fitted in the second engagement groove (82).

  The first and second arm portions (84) and (85) protrude downward so as to overlap the inner surface of the second base member (11), and the lower end of the second arm portion (85) is connected to the hook member (8). Is in the standby position, it comes into contact with the lower surface of the second base member (11).

  As shown in FIG. 10, the first engagement groove (81) has a wedge shape in which the opening width (W) in the front-rear direction can gradually decrease toward the back (upward), and the back side, that is, The opening width (W1) of the portion engaged with the first and second engagement shafts (51) and (52) of the striker (5) is determined by the engagement shafts (51) and (52) of the striker (5). It is dimensioned so that it can be engaged without rattling in the direction. Thereby, the first engagement groove (81) is engaged with the first and second engagement shafts (51) and (52) of the striker (5) so as to be in close contact with each other, and the seat back (3) is It can prevent tapping.

  The receiving edge (8a) of the first engaging groove (81) (the first and second engaging shafts (51) and (52) of the striker (5) are in contact with the direction (backward) of the seat back (3)). The abutting part (8b) continuous to the contact part) and the receiving edge part (8a), in other words, the rear edge of the second arm part (85) is not subjected to synthetic resin molding and the metal part of the base material is Exposed.

  Further, an inclined edge (83) provided at the tip of the first arm part (84), and a retaining edge part (8c) facing the receiving edge part (8a) of the first engagement groove (81) (seat back The part where the first and second engagement shafts (51) and (52) of the striker (5) abut against the lying direction of (3)), in other words, the synthetic resin mold on the front edge of the first arm (84) Each is molded.

  As a result, the metal portions abut immediately before the first or second engagement shaft (51) (52) of the striker (5) engages with the first engagement groove (81) of the hook member (8). Even if the hook member (8) is subjected to synthetic resin molding, the synthetic resin at the contact portion is not deformed, and there is no possibility that the hook member (8) is prevented from being displaced to the engagement position. Therefore, the first engagement shaft (51) does not engage the second engagement groove (82) beyond the first engagement groove (81).

  In the state where the first or second engagement shaft (51) (52) of the striker (5) is engaged with the first engagement groove (81), the seat back (3) is overloaded (the occupant is in the rear seat). The load that always acts in the state of sitting in (1)) can be received by the receiving edge (8a) where the metal part is exposed. As a result, even if the hook member (8) is subjected to synthetic resin molding, deformation due to early crushing of the synthetic resin portion is prevented, and the hook member (8) is engaged with the striker (5) for a long time. It can be ensured over a period of time. Further, in a state where the occupant is drowning in the seat back (3) or in a vehicle in which the rear seat (1) can be stored on the floor, the seat cushion (2) is put on the weight, and the rear seat (1) is moved rearward. When the operation knob (21) is to be operated, a load can be received at the receiving edge (8a) of the hook member (8), so the unlocking direction of the hook member (8) accompanying the deformation of the synthetic resin portion There is no risk of hindering rotation. Furthermore, since the synthetic resin mold is not applied to the rear edge (receiving edge portion (8a), contact portion (8b)) of the second arm portion (85), when the operation knob (21) is operated. A change in operating force is reduced (because it does not get caught in the synthetic resin mold), and a good operation can be obtained.

  Further, when the first and second engaging shafts (51), (52) of the striker (5) enter the striker entry grooves (71), (111) and come into contact with the inclined edge (83) of the hook member (8). The contact noise is alleviated by the synthetic resin molding part.

  The second engagement groove (82) is provided between the second arm portion (85) and the base portion, that is, the pivot portion (88) pivotally supported by the first pivot shaft (12), and the seat back (3). Is held in the second upright position and when the first engagement shaft (51) of the striker (5) has entered, the first engagement shaft (51) is normally inserted into the second engagement groove (82). The opening width in the front-rear direction is set so as not to contact.

  The front edge portion (85a) facing the second engagement groove (82) side of the second arm portion (85) is formed in an arc shape centering on the first pivot (12). In addition, a buffer portion (87) serving as a buffer means formed by synthetic resin molding that projects obliquely downward to the rear is formed on the front edge of the second engagement groove (82), that is, the rear edge of the pivot portion (88). Is provided.

  The edge portion (85a) of the second arm portion (85) has an arc shape centered on the first pivot (12), so that the seat back (3) is held in the second upright position. An excessive forward load acts on the seat back (3) via the seat belt connected to the back (3), and accordingly, the second engagement shaft (52) is moved to the first engagement groove ( 81) Even if the first engagement shaft (51) is deformed so as to come out of the first engagement shaft (51), the first engagement shaft (51) comes into contact with the front edge portion (85a) of the second arm portion (85) from a direction substantially orthogonal to the first engagement There is no case where the shaft (51) pushes up the second arm portion (85) and the hook member (8) is rotated in the unlocking direction. Accordingly, the engagement relationship between the first engagement shaft (51) and the second engagement groove (82) also contributes to the locking strength, and the seat back (3) can be firmly held in the second standing position. .

  When the hook member (8) is in the engaged position (see FIGS. 12 and 15), the buffer portion (87) moves the locus (L) of the first and second engagement shafts (51) and (52) of the striker (5). ) It is located outside, and when it is displaced to the second stage unlocking position (see FIG. 14), it moves in the movement locus (L). Thereby, when the first engagement shaft (51) enters the second engagement groove (82) of the hook member (8), the first engagement shaft (51) contacts the buffer portion (87). In addition to restricting the entry position of the striker (5), it is possible to mitigate the contact noise when the striker (5) enters. Further, when the hook member (8) rotates in the engaging direction (counterclockwise in FIGS. 6, 11 to 15) from the second-stage unlocking position and is displaced to the engaging position, the buffer (87) moves. It moves out of the locus (L) and moves away from the first engagement shaft (81). As a result, the influence of the dimensional variation between the first engagement shaft (51) and the second engagement shaft (52) of the striker (5) and the error in the mounting position of the striker (5) and the lock assembly (4), etc. Without being received, the first engagement groove (81) can be reliably engaged with the second engagement shaft (52).

  The buffer portion (87) is preferably molded integrally with the hook member (8) by synthetic resin molding as in this embodiment, but instead of this, it is separated from the hook member (8). You may form in.

  The open lever (9) is pivotally mounted by a second pivot (14) facing left and right above the striker entry groove (71) in the first base member (7) and wound around the second pivot (14). The urging force of the second spring (15) is urged in the standby direction (clockwise in FIGS. 6, 11 to 15), and normally, the standby position (91 in FIG. 11, 12 and FIG. 15).

  The action part (91) is interposed between the hook member (8) and the sensing member (10), and when the open lever (9) rotates counterclockwise from the standby position, the hook member (8) It can come into contact with the protruding shaft (86). When the open lever (9) is in the standby position, the hook lever (8), the striker (5), and other parts are mounted between the operating portion (91) and the projecting shaft (86). Due to this variation, a predetermined gap is formed so that the action portion (91) and the projecting shaft (86) do not interfere with each other.

  As will be described later, when the open lever (9) is displaced from the standby position to the first operation position (see FIG. 13) rotated counterclockwise based on the operation of the operation knob (21) of the operation means (6). The front edge of the action portion (91) of the open lever (8) is in contact with the projecting shaft (86) of the hook member (8) to move the hook member (8) from the engagement position to the first-stage unlock position. Displace. Similarly, when the first operating position is displaced further to the second operating position (see FIG. 14) rotated counterclockwise, the hook member (8) is displaced to the second-stage unlocking position.

  The sensing member (10) is formed by a third pivot (16) facing left and right above the striker entry groove (71) in the first base member (7) so as to overlap with the hook member (8) in the left and right direction. While being pivotally attached, it is urged downward by the third spring (17) wound around the third pivot (16), and the front upper part is normally a stopper piece (75) provided on the first base member (7). ) Is held at a standby position (see FIGS. 6 and 11).

  A tip portion (rear bottom) of the sensing member (10) is provided with a downward mountain-shaped contact portion (101) that can ride on the first and second engagement shafts (51) and (52) of the striker (5). ing.

  When the first engagement shaft (51) or the second engagement shaft (52) of the striker (5) is engaged with the first engagement groove (81) of the hook member (8), the sensing member (10) Detection position rotated by a predetermined amount from the standby position when the contact portion (101) rides on the first engagement shaft (51) or the second engagement shaft (52) (see FIGS. 12 to 15) Can be displaced.

  Next, the operation means (6) will be described. As shown mainly in FIG. 4, the operating means (6) has an upper piece (431) of the mounting bracket (43) on the first base member (7) side so as to be exposed at the shoulder of the seat back (3). A vertical cylindrical guide member (20) fitted in the mounting hole (431a) and an operation knob (21) accommodated in the guide member (20) so as to be slidable in the vertical direction. Have.

  The operation knob (21) is connected to a connecting shaft (233) fixed to one end of the bell crank (23), and is driven by the bell crank (23) so that the upper surface is connected to the upper surface of the guide member (20). Displaced to a first stop position (A) (see FIGS. 12 and 15) that is substantially flat, and a second stop position (B) (see FIG. 11) that has been immersed in the guide member (20) by a predetermined amount, Based on the operation of the occupant, a first operation position (C) (see FIG. 13) that immerses deeper than the second stop position (B), and a second operation position (see FIG. 13) that immerses deeper than the first operation position (C). D) (see FIG. 14).

  In the first stop position (A), the first or second engagement shaft (51) (52) of the striker (5) is engaged with the first engagement groove (81) of the hook member (8), and sensing is performed. The member (10) is in a detection position. In the second stop position (B), the sensing member (10) is in the standby position, and the first and second engagement shafts (51) and (52) are inserted into the first engagement groove (81) of the hook member (8). The state which is not engaged is shown. The first operation position (C) is an operation position when the open lever (9) is moved to the first operation position and the hook member (8) is moved to the first-stage unlocking position by the movement. The second operation position (D) is an operation position when the open lever (9) is moved to the second operation position and the hook member (8) is moved to the second-stage unlocking position by the movement.

  The upper part of the inner peripheral surface of the guide member (20) is provided with a display portion (not shown) with a color different from that of the guide member (20) or characters such as “UNLOCK”. The display is hidden by the operation knob (21) when the operation knob (21) is in the first stop position (A), and when the operation knob (21) is in a position other than the first stop position (A). Exposed. As a result, the passenger is alerted that the lock assembly (4) is not engaged with the striker (5), and safety can be improved.

  The bell crank (23) is pivotally attached to the mounting bracket (43) by a fourth pivot (22) facing in the front-rear direction so as to be swingable in the vertical direction, and is a fourth spring wound around the fourth pivot (22). 6 and 11-15, the first stop position (A1) (see FIGS. 12 and 15) and the first stop position (see FIGS. 12 and 15) are synchronized with the operation knob (21). The second stop position (B1) (see FIG. 11) rotated by a predetermined amount counterclockwise from A1), and the first operation position (C1) (rotated by a predetermined amount further counterclockwise than the second position (B1)) 13), the first operation position (C1) is further displaced to the second operation position (D1) (see FIG. 14) rotated counterclockwise by a predetermined amount.

  The urging force of the fourth spring (25) acting on the bell crank (23) is set to be smaller than the urging force of the third spring (17) acting on the sensing member (10).

  The other end of the bell crank (23) is provided with a first long hole (231) and a second long hole (232) having a predetermined length in the vertical direction.

  An upper end portion (24a) of a first connecting rod (24) whose lower end portion is connected to the sensing member (10) is loosely fitted in the first long hole (231) so as to be slidable in the vertical direction. Further, the upper end portion (26a) of the second connecting rod (26) whose lower end portion is connected to the open lever (9) is loosely fitted in the second elongated hole (232) so as to be slidable in the vertical direction. .

  The first elongated hole (231) is connected to the upper end (24a) of the first connecting rod (24) when the operation knob (21) and the bell crank (23) are in the first stop position (A) (A1). In the meantime, it corresponds to the operation stroke between the first stop position (A1) and the second operation position (D1) of the bell crank (23) for the counterclockwise rotation of the bell crank (23). The length is set to have play. As a result, when the operation knob (21) and the bell crank (23) move from the first stop position (A) (A1) to the second operation position (D) (D1) or vice versa, It is not transmitted to the sensing member (10).

  When the bell crank (23) is in the first stop position (A1), the second long hole (232) is between the upper end (26a) of the second connecting rod (26) and the bell crank (23). Set to a length that has a play equivalent to the operating stroke between the first stop position (A1) and the second stop position (B1) of the bell crank (23) with respect to the counterclockwise rotation. Is done. As a result, the operation when the operation knob (21) and bell crank (23) are moved from the first stop position (A) (A1) to the second stop position (B) (B1) or vice versa is opened. It is not transmitted to the lever (9).

  The displacement of the operation knob (21) and bell crank (23) from the first stop position (A) (A1) to the second stop position (B) (B1) and vice versa is performed as follows. Is called.

When the sensing member (10) is in the standby position (see FIG. 11):
With the upper end portion (24a) of the first connecting rod (24) in contact with the upper end of the first long hole (231), the operation knob (21) and the bell crank (23) are respectively in the second stop position (B ) (B1). In this case, the biasing force of the third spring (17) acting on the sensing member (10) is set to be larger than the biasing force of the fourth spring (25) acting on the bell crank (23). The bell crank (23) does not rotate in the clockwise direction (first stop position (A1)) by the urging force of the fourth spring (25).

When the sensing member (10) is displaced from the standby position to the detection position (FIG. 11 → FIG. 12 or FIG. 15):
As the sensing member (10) moves from the standby position to the detection position, the first connecting rod (24) is lowered. Accordingly, the bell crank (23) is moved from the second stop position (B1) to the first stop position (A1) by the urging force of the fourth spring (25) so as to follow the movement of the sensing member (10). It is displaced to.

When the sensing member (10) is displaced from the detection position to the standby position (FIG. 12 or FIG. 15 → FIG. 11):
When the sensing member (10) is displaced from the detection position to the standby position, the first connecting rod (24) is raised accordingly, and the upper end (24a) comes into contact with the upper end of the first slot (231). In order to push up, the bell crank (23) is displaced to the second stop position (B1) against the urging force of the fourth spring (25).

  Next, the assembly procedure of the lock assembly (4) will be described. As shown in FIG. 3, before the first base member (7) and the second base member (11) are coupled to each other, the first subassembly (41) on the first base member (7) side and the second A second subassembly (42) on the base member (11) side is formed.

  The first sub-assembly (41) is attached to the first base member (7) by previously crimping the ends of the pivots (14) and (16) to pivotally attach the open lever (9) and the sensing member (10). The springs (15) and (17) are assembled.

  The second sub-assembly (42) caulks in advance one end of the first pivot (12) (the end protruding from the second base member (11)) to the second base member (11), and hook member (8). ) And the first spring (13) is assembled. In this state, as shown in FIGS. 8 and 9, the hook member (8) is rotatable between the second base member (11) and the enlarged diameter portion (121) of the first pivot (12). Be held.

  After the first and second subassemblies (41) and (42) are formed, the positioning protrusion (76) provided on the first base member (7) is inserted into the positioning hole (115) provided on the second base member (11). Engage and position. In this state, the other end of the first pivot (12) is inserted into the shaft hole (72) (see FIG. 2) of the first base member (7) and caulked, and the first fixed piece (73). And the second fixing piece (112) are coupled to each other by the bolt (18) from the direction orthogonal to the pivots (12), (14) and (16) as described above. Thus, by forming the first subassembly (41) and the second subassembly (42) in advance, the assembly work of the lock assembly (4) can be performed efficiently.

  The first base member (7) and the second base member (11) are arranged near the opening side of each striker entry groove (71) (111) by a bolt (18), and the striker entry groove (71) (111). Because the first pivot (12) is connected to each other in the vicinity of the back of each, deformation around the striker entry grooves (71) and (111) where loads are concentrated can be suppressed, and the lock strength can be improved. Can be planned.

  The hook member (8) is pivotally attached to the second base member (11), and the open lever (9) and the sensing member (10) are pivotally attached to the first base member (7). ) And the sensing member (10) can be disposed between the first base member (7) and the second base member (11) so as to overlap in the left-right direction. Accordingly, the vertical dimension of the lock assembly (4) can be shortened. As a result, the lock assembly (4) can be arranged in a narrow storage space near the shoulder portion of the seat back (3). As a result, the lock assembly (4) can be disposed at a position farthest from the hinge shaft of the seat back (3), the moment acting on the lock assembly (4) can be reduced, and the seat back (3) The supporting strength can be increased.

  Moreover, since the hook member (8) can be brought close to the vehicle body panel side to which the striker (5) is fixed, the length of each engagement shaft (51) (52) in the striker (5) can be shortened. The lock strength can be improved.

Next, the operation of this embodiment will be described.
(I) When the seat back (3) is held in the first upright position (see FIG. 12):
The first engagement shaft (51) of the striker (5) is engaged with the first engagement groove (81) of the hook member (8). In this state, the first engagement shaft (51) is in contact with the receiving edge (8a) of the hook member (8) with respect to the direction in which the seat back (3) is bent.

  In the sensing member (10), the contact portion (101) rides on the first engagement shaft (51) of the striker (5) and is displaced to the detection position. Thereby, the operation knob (21) is held at the first stop position (A). Therefore, the occupant visually recognizes that the upper surface of the operation knob (21) is in the first stop position (A) which is flat with the upper surface of the guide member (20), so that the first engagement of the striker (5). Easily confirm that the shaft (51) is engaged with the first engagement groove (81) of the hook member (8) and the seat back (3) is securely held in the first upright position. Can do.

(Ii) When the seat back (3) is held in the second standing position (see FIG. 15):
The second engagement shaft (52) of the striker (5) is engaged with the first engagement groove (81) of the hook member (8), and the first engagement shaft (51) is engaged with the second engagement groove ( 82). In this state, the second engagement shaft (52) is in contact with the receiving edge (8a) of the first engagement groove (81) in the direction in which the seat back (3) is bent. The first engagement shaft (51) is loosely fitted in the second engagement groove (82) so as to be separated from the buffer portion (87).

  In the sensing member (10), the contact portion (101) rides on the second engagement shaft (52) and is displaced to the detection position. Thereby, the operation knob (21) is held at the first stop position (A). Accordingly, in the same manner as in (i) above, the occupant has the second engagement shaft (52) engaged with the first engagement groove (81) of the hook member (8) and the seat back (3) is second. It can be easily confirmed that it is securely held in the standing position.

(Iii) When the seat back (3) is in the lying position, or when the striker (5) is not engaged with the hook member (8) of the lock assembly (4) (see FIG. 11):
The hook member (8) is held at the standby position by the biasing force of the first spring (13), and the sensing member (10) is held at the standby position by the biasing force of the third spring (17). (21) and the bell crank (23) are held at the second stop positions (B) and (B1) against the urging force of the fourth spring (25).

  In this state, the occupant has the striker (5) attached to the lock assembly (4) based on the fact that the upper surface of the operation knob (21) is immersed in the guide member (20) and the display portion is exposed. It can be easily confirmed that the hook member (8) is not engaged.

(Iv) When moving the seat back (3) from the lying position to the first standing position:
When the seat back (3) is erected from the lying position, first, the first engagement shaft (51) of the striker (5) enters the striker entry grooves (71) (111) and the hook members (8) By making contact with the inclined edge (83) and the inclined edge (102) provided at the tip of the sensing member (10), the hook member (8) resists the biasing force of the first spring (13), The sensing member (10) is displaced upward from the standby position, and the sensing member (10) is lifted up against the urging force of the third spring (17), and the contact portion (101) is moved to the first engagement shaft ( Get on 51) and move to the detection position.

  Then, the first engagement shaft (51) abuts on the abutting portion (8b) provided on the second arm portion (85) of the hook member (8) (see FIG. 13), thereby the seat back (3). Stops at the first standing position, and the hook member (8) is displaced to the engagement position by the urging force of the first spring (13) and is moved to the first engagement shaft (51) of the striker (5). The engaging groove (81) is engaged (see FIG. 12). As a result, the seat back (3) is held in the first standing position, and the operation knob (21) is displaced from the second stop position (B) to the first stop position (A).

  When the operation knob (21) is displaced from the second stop position (B) to the first stop position (A), the bell crank (23) and the open lever (9) are located at the second stop position of the bell crank (23). Since it is connected via play corresponding to the movement distance between (B1) and the first stop position (A1), the second stop position (B1) of the operation knob (21) is changed to the first stop position (A1). The movement to) is not transmitted to the open lever (9). As a result, even when the operation knob (21) is displaced to the first stop position (A), the hook member (8) can be held at the engagement position.

(V) When moving the seat back (3) from the first standing position to the lying position:
The operation knob (21) is pushed in from the first stop position (A) to the first operation position (C). Accordingly, the bell crank (23) rotates from the first stop position (A1) to the first operation position (C1) against the urging force of the fourth spring (25), and the second connecting member (26 ) And the open lever (9), the hook member (8) is rotated from the standby position to the first-stage unlocking position (see FIG. 13). As a result, the first engagement shaft (51) of the striker (5) can be detached from the first engagement groove (81). In this state, the seat back (3) can be moved to the lying down position by rotating forward.

  In this case, when the operation knob (21) is pushed from the first stop position (A) to the first operation position (C), the operation knob (21) and the sensing member (10) are connected to the first of the bell crank (23). Since the movement between the stop position (A1) and the first operation position (C1) is coupled to each other so that the movement is not transmitted to the sensing member (10), the operation of the operation knob (21) ) Is not transmitted.

Further, when the seat back (3) is moved to the lying position, the operation knob (21) is displaced to the second stop position (B) and is immersed in the guide member (20). Does not come into contact with the front seat (not shown) or the like to damage the skin or the like of the front seat.
(Vi) When moving the seat back (3) from the first standing position to the second standing position:
As shown in FIG. 14, the operation knob (21) is pushed down to the second operation position (D), and the bell crank (23) is displaced to the second operation position (D1). As a result, the hook member (8) is displaced to the second-stage unlocking position via the second connecting rod (26) and the open lever (9), and the first engaging shaft (51) of the striker (5). Can be detached from the first engaging groove (81) of the hook member (8). In this state, the seat back (3) is pushed rearward, and the first engagement shaft (51) is inserted into the second engagement groove (82) as shown by a two-dot chain line in FIG. Release the operating force of (21). Accordingly, as shown in FIG. 15, the hook member (8) is displaced to the engagement position by the biasing force of the first spring (13), and the second engagement shaft (52) is moved to the first engagement groove ( 81) and the first engagement shaft (51) is loosely fitted in the second engagement groove (82).

  At this time, when the first engagement shaft (51) of the striker (5) enters the second engagement groove (82), the first engagement shaft (51) is displaced to the second stage unlocking position. Since it abuts against the buffer portion (87) of the member (8), the abutment sound when the seat back (3) is stopped at the second standing position is alleviated, and the position at which the seat back (3) is stopped is determined. be able to. As a result, the first engagement groove (81) of the hook member (8) can be reliably engaged with the second engagement shaft (52). When the hook member (8) is displaced to the engagement position, the buffer portion (87) is separated from the first engagement shaft (51) and does not restrain the first engagement shaft (51). The first engagement shaft 51 and the second engagement shaft 52 are not affected by variations in dimensions between the first engagement shaft 51 and the second engagement shaft 52 and errors in the mounting position of the striker 5 and the lock assembly 4. The engagement groove (81) can be reliably engaged with the second engagement shaft (52).

(Vii) When moving the seat back (3) from the second standing position to the lying position:
As in (vi) above, the operating knob (21) is pushed down to the second operating position (D), the hook member (8) is displaced to the second stage unlocking position, and the second engagement of the striker (5). The shaft (52) can be detached from the first engagement groove (81) of the hook member (8), and the first engagement shaft (51) can be detached from the second engagement groove (82). Move back (3) forward.

It is a perspective view of the rear seat for vehicles to which the present invention is applied. It is a disassembled perspective view of a lock assembly. It is a perspective view of the lock assembly in a temporarily assembled state. It is the perspective view of the lock assembly seen from diagonally back. It is a rear view of a lock assembly. It is a side view of a lock assembly. It is a cross-sectional view which follows the VII-VII line in FIG. It is a longitudinal cross-sectional view which follows the VIII-VIII line in FIG. It is a cross-sectional view which follows the IX-IX line in FIG. It is an enlarged view of the principal part of a hook member. It is an action explanatory view showing operation of the important section when an operation knob exists in the 2nd stop position. It is operation | movement explanatory drawing which shows operation | movement of the principal part when an operation knob exists in a 1st stop position. It is an action explanatory view showing operation of the important section when an operation knob exists in the 1st operation position. It is an action explanatory view showing operation of the important section when an operation knob exists in the 2nd operation position. It is operation | movement explanatory drawing which shows operation | movement of the principal part when an operation knob exists in a 1st stop position.

Explanation of symbols

(1) Rear seat
(2) Seat cushion
(3) Seat back
(4) Lock assembly
(5) striker
(6) Operation means
(7) First base member
(8) Hook member
(8a) Receiving edge
(8b) Contact part
(8c) retaining edge
(9) Open lever
(10) Sensing member
(11) Second base member
(12) First axis
(13) First spring
(14) Second axis
(15) Second spring
(16) Third axis
(17) Third spring
(18) Bolt (fixing means)
(20) Guide member
(21) Operation knob
(22) Fourth axis
(23) Bell crank
(24) First connecting rod
(24a) Upper end
(25) Fourth spring
(26) Second connecting rod
(26a) Upper end
(31) Seat frame
(41) First subassembly
(42) Second subassembly
(43) Mounting bracket
(51) First engagement shaft
(52) Second engagement shaft
(53) Base member
(54) Engagement rod
(71) Strike approach groove
(72) Shaft hole
(73) First fixed piece
(74) Burring
(75) Stopper piece
(76) Positioning protrusion
(81) First engagement groove
(82) Second engagement groove
(83) Inclined edge
(84) First arm
(85) Second arm
(85a) Front edge
(86) Projection shaft
(87) Buffer part (buffer means)
(88) Pivot (base)
(91) Action part
(101) Contact part
(102) Inclined edge
(111) Strike approach groove
(112) Second fixed piece
(113) Mating hole
(114) Hook
(115) Positioning hole
(121) Expanded part
(131) One end
(132) The other end
(181) Head
(231) 1st slot
(232) Second slot
(233) Connecting shaft
(431) Upper part
(431a) Mounting hole

Claims (4)

In the vehicle seat lock device capable of holding the seat back supported by the vehicle body in an upright position in an upright position,
A first base member fixed to the seat back;
A second base member fixed so as to face the first base member;
A hook member that is pivotally attached by a pivot between the first base member and the second base member and engages with a striker on the vehicle body side that enters a striker entry groove provided in the first and second base members. When,
A standby position when the first base member and the second base member are pivotally attached by another pivot that faces in the same direction as the pivot, and the striker is not engaged with the engagement groove of the hook member. And a sensing member that can be displaced from the standby position to the detection position by contacting the striker by engaging the striker with the engagement groove,
The vehicle seat lock device, wherein the hook member and the sensing member are arranged so as to overlap each other along the axial direction of each pivot.   2. The vehicle seat lock device according to claim 1, wherein the hook member is disposed on the side close to the vehicle body side on which the striker is fixed.   3. The vehicle seat lock device according to claim 1, wherein operating means capable of displacing the position based on the displacement of the sensing member is attached to the first base member or the second base member.   Between the first base member and the second base member, an open lever having an action portion that is further operated based on the operating means and can displace the hook member to the unlocking position to be detached from the striker is disposed. 4. The vehicle seat lock device according to claim 3, wherein a hook is interposed between the hook member and the base plate. 5.

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