JP7265188B2 - vehicle seat - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly to a vehicle seat configured to release a restriction (slide lock) on a sliding motion of a seat body in conjunction with a pivoting motion of a seat back.

Vehicle seats are already well known in which a seat body can be slid and a seat back can be turned (reclining and standing). Among such vehicle seats, there is a vehicle seat that releases the restriction on the sliding motion of the seat body (hereinafter referred to as a slide lock) in conjunction with the rotating motion of the seat back. According to this configuration, the slide lock is released when the seat back is rotated to the predetermined receding angle.

Further, among vehicle seats, there is a seat body in which a section that can be entered within a sliding movement range of the seat body changes according to the recline angle of the seat back (see, for example, Patent Document 1). According to the vehicle seat disclosed in Patent Document 1, when the seat back is in the upright posture, the seat body is restricted from entering a section in which the seat cushion can be flipped up in the sliding movement range. It's becoming In other words, in the vehicle seat disclosed in Patent Document 1, the possible tilt angle of the seat back is determined according to the position of the seat body in the slide movement range.

JP-A-9-188169

By the way, in the conventional structure in which the slide lock is released in conjunction with the rotation of the seatback, as described above, the slide lock is released when the seatback rotates to a predetermined receding angle. Further, in the conventional structure, when the seat back is further rotated after that, the slide lock is usually held in the released state.

On the other hand, a configuration in which the setting/release of the slide lock is switched according to the position of the seat body in the slide movement range, like the configuration in which the angle that can be taken as the recline angle of the seat back is determined according to the position of the seat body in the slide movement range. can be considered. For example, the slide lock is released by rotating the seat back to a predetermined recline angle while the seat body is moving toward one end of a predetermined section of the slide movement range. After that, when the seat body passes over one end of the predetermined section, the slide lock is set again.

Switching between the setting and releasing of the slide lock as described above is difficult to achieve in the conventional configuration in which the slide lock is held in the released state when the seat back is turned to a predetermined recline angle. is. Further, it is desirable that the mechanism for switching between setting and releasing of the slide lock according to the position of the seat body within the slide movement range is as simple as possible.

Further, as in the vehicle seat disclosed in Japanese Unexamined Patent Application Publication No. 2002-100003, there is a case where the seat body is restricted from exceeding one end of a predetermined section in the sliding movement range when the seat back is in the upright posture. A mechanism for realizing such a configuration is also desired to be as simple as possible.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a simpler mechanism for switching between setting and releasing of the slide lock according to the position of the seat body in the slide movement range. To provide a vehicle seat with improved durability.
Another object of the present invention is to simplify the structure of a mechanism for restricting the seat body from exceeding one end of a predetermined section in the sliding movement range when the seat back is in the upright position.

According to the vehicle seat of the present invention, a seat body having a seat back that rotates in a lying down direction; a slide rail mechanism having a slide lock mechanism that regulates the slide movement of the seat body; a seatback erection regulation mechanism that regulates the erection motion of the seatback; and an interlocking mechanism interlocked with the rotational movement of the seatback and coupled to the slide lock mechanism and the seatback erection regulation mechanism, wherein the interlocking The mechanism has a seatback-side rotating body that is pivotally supported so as to be relatively rotatable with respect to the seatback. a relay unit that is rotatably supported and relays the operation of the rotating unit to the slide lock mechanism; one end of which is connected to the rotating unit and the other end of which is connected to the relay unit; a second cable having one end connected to the relay unit and the other end connected to the seatback erection regulating mechanism; and one end connected to the relay unit. a third cable the other end of which is connected to the slide lock mechanism, and when the recline angle of the seatback exceeds a certain angle, the seatback-side rotating body rotates together with the seatback. The rotating unit pulls the first cable in conjunction with the seatback-side rotating body, and the relay unit connected to the other end of the first cable rotates to rotate the first cable. (3) By pulling the cable , the slide lock mechanism is released, and the luggage compartment is moved to the slide movement range where the seat body can move along the slide rail mechanism by moving the seat body forward. An expandable cargo space forming section is formed, and the seat back erection regulating mechanism is positioned at a predetermined lower position of the side frame of the seat back when the seat back is in the erected posture, and the When the seat body is in the forward tilting posture, the seat body is disposed in a position facing the corner-shaped recess located above the predetermined lower position, and when the seat body is in the luggage compartment forming section. A restricting portion whose rear end rises and engages with the recess and positions the recess above the predetermined lower position to restrict the seat back from rotating from the forward leaning posture to the standing posture. and

In a more preferred configuration of the vehicle seat, a stepped portion is formed on the side portion of the slide rail mechanism, and the vehicle seat moves along the slide rail mechanism and rotates. A trigger member movably supported may be provided, and the trigger member may rotate by riding on the stepped portion and be driven to lift the rear end portion of the restricting portion .

According to the vehicle seat of the present invention, the mechanism for switching the setting/release of the slide lock according to the position of the seat body in the slide movement range has a simpler configuration.
Further, according to the vehicle seat of the present invention, the mechanism for restricting the seat body from exceeding one end of the predetermined section in the sliding movement range when the seat back is in the upright posture has a simpler structure.
Further, according to the vehicle seat of the present invention, when the seat body is at a position beyond one end of the predetermined section in the sliding movement range, the seat back is restricted from standing up, and the occupant is seated on the vehicle seat at this point. It is possible to appropriately suppress the occurrence of
Further, according to the vehicle seat of the present invention, each of the first rotating body, the second rotating body, and the third rotating body is appropriately attached to the seat body through the casing, and the casing prevents foreign matter from adhering to each rotating body. can be appropriately suppressed.
In addition, according to the vehicle seat of the present invention, it is possible to make the restriction switching mechanism inconspicuous, and to suppress the impact on the feeling of seating that the occupant feels when sitting on the vehicle seat.
Further, according to the vehicle seat of the present invention, the protrusion formed by cutting and raising a portion of the casing enables the rotating body in contact with the protrusion to be rotated appropriately.
Further, according to the vehicle seat of the present invention, the first rotating body cable causes the rotating movement of the first rotating body to be appropriately interlocked with the rotating movement of the seat back, and the third rotating body cable causes the slide lock. can be properly released.
Further, according to the vehicle seat of the present invention, it is possible to appropriately route the first rotating body cable and the third rotating body cable while reducing the wiring space.
Further, according to the vehicle seat of the present invention, it is possible to appropriately release the engagement state between the second rotating body and the first rotating body by the cable for the second rotating body. Moreover, it is possible to appropriately route the cable for the second rotating body while reducing the wiring space.
Further, according to the vehicle seat of the present invention, it is possible to appropriately arrange the first rotating body, the second rotating body, and the third rotating body in the seat while suppressing an increase in the size of the seat.
Further, according to the vehicle seat of the present invention, the rotation shaft of the first rotation member and the rotation shaft of the third rotation member are made common, thereby reducing the number of parts and suppressing an increase in the size of the seat. becomes possible.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole image of the vehicle seat which concerns on one Embodiment of this invention. FIG. 5 is a diagram showing a correspondence relationship between a sliding movement range of a seat body and a seat attitude; It is the perspective view which looked at the seat cushion frame from the downward direction. FIG. 4 is an explanatory diagram of a slide lock mechanism; It is a side view which shows the state before operation|movement of a 1st interlocking unit. It is a side view which shows the state during operation|movement of a 1st interlocking unit. FIG. 11 is a side cross-sectional view showing a state before operation of the second interlocking unit; FIG. 11 is a side cross-sectional view showing a state during operation of the second interlocking unit; FIG. 5 is a diagram showing a state in which the seat body is locked by a movement restricting member; FIG. 10 is a diagram showing a state in which the seat body is not restricted by the movement restricting member; It is a side view which shows the state before operation|movement of a 3rd interlocking unit. FIG. 11 is a side view showing a state during operation of the third interlocking unit; FIG. 4 is a front view showing a state before operation of the regulation switching mechanism; It is a front view which shows the state during operation|movement of a regulation switching mechanism (part 1). It is a front view which shows the state during operation|movement of a regulation switching mechanism (part 2).

An embodiment of the present invention (hereinafter referred to as the present embodiment) will be described below with reference to the drawings. The embodiments described below are merely examples for facilitating understanding of the present invention, and do not limit the present invention. That is, the present invention can be modified and improved without departing from its spirit, and the present invention includes equivalents thereof.

<<Basic Configuration of Vehicle Seat>>
First, the basic configuration of the vehicle seat according to this embodiment will be described with reference to FIG. In the following description, the term "front-rear direction" means the front-rear direction of the vehicle seat, and specifically, the direction that coincides with the front-rear direction (running direction) of the vehicle. Further, the "width direction" is the width direction of the vehicle seat, and specifically, the direction that coincides with the width direction (horizontal direction) of the vehicle.

In addition, the positions and postures of the respective parts of the seat described below are for when the vehicle seat is in the normal state, unless otherwise specified. Here, the normal state means a state in which the vehicle seat can be seated, more specifically, a state in which the seat back 2 is in a standing posture.

A vehicle seat according to the present embodiment (hereinafter referred to as "main seat S") is used as a rear seat of a vehicle (strictly speaking, seats in the second and subsequent rows). The seat S includes a seat body Sh and a slide rail mechanism 30 that slides the seat body Sh in the front-rear direction. When the seat body Sh is slid slightly forward from the normal position (position where the user can sit), the space behind the main seat S in the vehicle compartment becomes a space for placing luggage (that is, a luggage compartment). used as

As shown in FIG. 1, the seat body Sh consists of a seat cushion 1 on which the occupant sits, a seat back 2 on which the occupant's back rests, and a headrest 3 that supports the occupant's head. The seat cushion 1 and the seat back 2 are configured by assembling pad materials 1a and 2a such as urethane to a frame forming the skeleton thereof, and covering the pad materials 1a and 2a with skin materials 1b and 2b. The configurations of the seat cushion 1 and the seat back 2 are generally the same as known configurations.

A lower end portion of the seat back 2 and a rear end portion of the seat cushion 1 are connected via a reclining mechanism 20 . This reclining mechanism 20 has the same configuration as a known reclining mechanism. Specifically, the reclining mechanism 20 includes a reclining lock mechanism (not shown) inside. Normally, the reclining lock mechanism is in a state in which the rotation of the seatback S2 is restricted (locked). On the other hand, when the occupant operates the release lever 21 provided at the side end of the seat cushion 1, the state of the reclining lock mechanism shifts from the locked state to the unlocked state.

Then, when the reclining lock mechanism shifts to the unlocked state, the seat back 2 can be rotated in a forward or backward tilting direction. In other words, the seat back 2 can be rotated in both the laying down direction and the standing up direction with respect to the seat cushion 1 . Due to this pivoting motion of the seat back 2, the degree of recline of the seat back 2 (for easy understanding, the angle between the seat cushion 1 and the seat back 2 (the recline angle)) changes. In the following description, among the directions in which the seat back 2 rotates, the lying down direction is called the "first direction", and the standing up direction is called the "second direction".

To summarize the configuration of the slide rail mechanism 30, the slide rail mechanism 30 is arranged below the seat body Sh and is provided as a pair with a gap in the width direction. Each slide rail mechanism 30 has a lower rail 31 and an upper rail 32, as shown in FIG. The lower rail 31 is fixed to the vehicle body floor so that its extending direction extends along the front-rear direction. The upper rail 32 is slidably attached to the lower rail 31 . As the upper rails 32 slide (sliding) relative to the lower rails 31, the seat body Sh fixed to the upper rails 32 slides in the longitudinal direction.

The slide rail mechanism 30 also has a slide lock mechanism for restricting the sliding of the upper rails 32 with respect to the lower rails 31, in other words, the sliding motion of the seat body Sh. Normally, the slide lock mechanism is in a state in which the sliding motion of the seat body Sh is set to be regulated (slide lock). On the other hand, when the occupant operates the release lever 39 provided at the side end of the seat cushion 1, the state of the slide lock mechanism shifts from the locked state to the unlocked state. When the slide lock mechanism shifts to the unlocked state, the seat body Sh becomes slidable in the front-rear direction.

By the way, in this embodiment, as shown in FIG. 2, the sliding movement range of the seat body Sh is divided into two sections. One of the two sections is the section positioned more rearward in the slide movement range, and the seat body Sh is positioned when the main seat S is in the normal state (that is, the seatable state). It is an interval to obtain. When the seat body Sh is positioned in such a section (hereinafter referred to as "walk-in section R1"), the release lever 21 is operated to shift the state of the reclining lock mechanism from the locked state to the unlocked state, It becomes possible to rotate the seat back 2 . Similarly, when the seat body Sh is in the walk-in section R1, the release lever 39 is operated to release the slide lock, so that the seat body Sh can freely slide.

Note that the walk-in section R1 corresponds to the predetermined section of the present invention. Further, in the following description, the position of the seat body Sh within the walk-in section R1 will be referred to as the "normal position".

Of the two sections, the other section is positioned further rearward in the slide movement range, and is a section set to utilize the rear space of the main seat S as a luggage compartment. That is, when the seat body Sh is positioned in such a section (hereinafter referred to as a "luggage compartment forming section R2"), a luggage compartment is formed behind the main seat S. As shown in FIG. In addition, if the seat body Sh is moved forward within the luggage compartment forming section R2, the luggage compartment can be expanded.

In the following description, the position of the seat body Sh within the luggage compartment formation section R2 will be referred to as the "luggage compartment formation position".

Further, in the present embodiment, when the seat body Sh is about to enter the luggage compartment forming section R2 from the walk-in section R1, the seat body Sh enters the luggage compartment forming section R2 unless the recline angle of the seat back 2 is equal to or greater than a predetermined value. It is supposed to be impossible to enter. In other words, in the present embodiment, when the seat body Sh is sliding toward the front end (corresponding to one end) of the walk-in section R1, the seat is moved only when the above-described lodging angle is equal to or greater than a predetermined size. The main body Sh can go over the front end position of the walk-in section R1 (that is, the boundary position between the walk-in section R1 and the luggage compartment forming section R2).

As described above, in the present embodiment, the seat body Sh cannot enter the luggage compartment formation section R2 unless the recline angle of the seat back 2 is equal to or greater than a predetermined value. In other words, the seat back 2 is always in a forward tilting posture while the seat body Sh is positioned within the luggage compartment forming section R2. This is because, when the seat body Sh is in the luggage compartment forming position, the space between the main seat S and the vehicle seat positioned in front thereof is very narrow, and in such a situation, the occupant may force the main seat S to move. This is to prevent sitting.

Further, in this embodiment, when the seat back 2 rotates in the first direction until the recline angle reaches a predetermined value or more, the slide lock is released in conjunction with this. Furthermore, as described above, the seat body Sh passes over the front end of the walk-in section R1 and enters the luggage compartment forming section R2 when the seat back 2 is in the forward tilting posture. Furthermore, in the present embodiment, in order to hold the seat body Sh at the luggage compartment formation position after entering the luggage compartment formation section R2, the seat body Sh is released when it reaches a predetermined position in the luggage compartment formation section R2. to reset the slide lock.

As described above, in the present embodiment, the setting/release of the slide lock is switched according to the recline angle of the seat back 2 and the position of the seat body Sh in the slide movement range. In other words, the seat S has a mechanism that switches setting/release of the slide lock by operating in conjunction with the rotating motion of the seat back 2 and the sliding motion of the seat body Sh.

In the following, the mechanism that operates in conjunction with the pivoting motion of the seat back 2 and the sliding motion of the seat body Sh in the seat S, including the mechanism that operates to switch between setting and releasing of the slide lock, will be described. .

<<Regarding the mechanism that interlocks with the rotating movement of the seat back and the sliding movement of the seat body>>
The seat S includes four types of units (specifically, a first interlocking unit 70, a second interlocking unit 80, a third It has an interlocking unit 90 and a relay unit 40). Some of these units switch the state of the slide lock mechanism, that is, the setting and release of the slide lock. In the following, first, the slide lock mechanism will be explained, and then each of the above four types of units will be explained.

(About the slide lock mechanism)
The slide lock mechanism will be described with reference to FIGS. 3 and 4. The slide lock mechanism has a rotating shaft 37 and a pressing bracket 38 shown in FIG. 3, and a lock lever 33 and lever support bracket 34 shown in FIG. . The rotating shaft 37 and the pressing bracket 38 are provided on the seat body Sh (more specifically, the lower end portion of the seat cushion frame 10). The lock lever 33 and the lever support bracket 34 are provided on the upper rail 32 .

In addition, in this embodiment, as shown in FIGS. 3 and 4, a rail mounting bracket 15 is interposed between the lower end portion of the seat cushion frame 10 and the upper rail 32 . That is, in this embodiment, the upper rail 32 is attached to the seat cushion frame 10 , specifically the lower end portion of the side frame 11 via the rail attachment bracket 15 .

The rotating shaft 37 is a shaft provided to extend along the width direction of the seat cushion frame 10 . A release lever 39 is attached to the end of the rotating shaft 37 . When the release lever 39 is operated so that the front end portion of the release lever 39 rotates upward and rearward, the rotary shaft 37 rotates around the central axis extending in the width direction.

The pressure brackets 38 are a pair of metal plate members provided with a space left and right, and are welded to the rotating shaft 37 respectively. Therefore, when the rotary shaft 37 rotates, each pressing bracket 38 rotates integrally with the rotary shaft 37 . Further, when each pressing bracket 38 rotates integrally with the rotating shaft 37, the pressing portion 38a formed at the bottom of each pressing bracket 38 descends in an arc shape.

A biasing spring (not shown) is attached to each pressing bracket 38 and receives a biasing force from the biasing spring. As a result, the pressing brackets 38 and the rotary shaft 37 to which the pressing brackets 38 are welded are normally urged in the direction opposite to the direction in which they rotate when the release lever 39 is operated. As a result, each pressing bracket 38 is normally at a predetermined standby position.

The lock lever 33 is a metal member provided on each upper rail 32 and is attached to the upper rail 32 via a lever support bracket 34 in a rotatable state. The lock lever 33 has a lock claw (not shown). On the other hand, the lower rail is formed with a plurality of engaging holes (not shown) arranged along its extending direction.

When the lock lever 33 is at one end of its rotation range, the lock claw engages with one of the plurality of lock holes formed in the lower rail 31 . When the lock lever 33 is in such a state, sliding of the upper rail 32 with respect to the lower rail 31 is restricted. That is, the slide lock is set when the lock lever 33 is at one end position of the rotation range. On the other hand, when the lock lever 33 is at the other end position of the rotation range, the lock claw is released from the lock hole. When the lock lever 33 is in such a state, sliding of the upper rail 32 with respect to the lower rail 31 is permitted. That is, the slide lock is released when the lock lever 33 is at the other end position of the rotation range.

A biasing spring (not shown) is attached to the lock lever 33 and receives a biasing force from the biasing spring. By receiving the biasing force, the lock lever 33 is normally held at one end position of the rotation range, that is, at the lock position where the lock claw engages with the lock hole.

Further, as shown in FIG. 4, the lock lever 33 has a supported portion 33a supported by the lever support bracket 34 by the support shaft 35, and a position continuous with the supported portion 33a so as to protrude outward in the width direction. and an extending overhang portion 33b. The projecting portion 33b is located directly below the pressing portion 38a of the pressing bracket 38. As shown in FIG. When the pressing portion 38a is lowered by the rotation of the pressing bracket 38, the projecting portion 33b is pushed down by the pressing portion 38a. As a result, the lock lever 33 rotates against the biasing force described above toward the other end position of the rotation range, that is, toward the unlocked position where the lock claw is released from the lock hole.

(About the first interlocking unit)
Next, the first interlocking unit 70 will be described with reference to FIGS. The first interlocking unit 70 is arranged at a side position on the side of the seat cushion frame 10 and the seatback frame 100 , and is a mechanism that interlocks with the rotational movement of the seatback 2 . 5 and 6, the first interlocking unit 70 has a seatback-side rotating body 71, a connecting link 72, a cable connecting link 73, and a link mounting bracket 74. As shown in FIGS.

The seatback-side rotating body 71 is a substantially semicircular member when viewed from the side, and is arranged at a position adjacent to the side frame 101 of the seatback frame 100 in the width direction. The seatback-side rotating body 71 is supported so as to be relatively rotatable with respect to the seatback 2 . Specifically, the seatback-side rotating body 71 is supported by a shaft (reclining shaft 20 a ) of the reclining mechanism 20 passing through the side frame 101 . The reclining shaft 20a is inserted into a shaft hole (not shown) formed in the seatback-side rotating body 71, and comes into sliding contact with the inner peripheral surface of the shaft hole when the seatback 2 rotates. As a result, the seatback-side rotating body 71 rotates relative to the seatback 2 about the reclining shaft 20a. In other words, as can be seen by comparing FIGS. 5 and 6, the seatback 2 rotates relative to the seatback-side rotating body 71 when it rotates.

Further, as shown in FIG. 6, the seatback-side rotating body 71 rotates to the side frame 101 when the seatback 2 rotates in the first direction and the receding angle of the seatback 2 reaches a predetermined size. abuts against a pressure bracket 102 attached to the . The pressing bracket 102 is a metal fitting attached to the outer surface of the side frame 101, and has a projecting portion 102a projecting outward in the width direction. When the seat back 2 rotates in the first direction until the recoil angle reaches a predetermined value, the overhanging portion 102 a abuts on the upper end portion of the seat back-side rotating body 71 . When the seat back 2 further rotates in the first direction from this point, the upper end portion of the seat back side rotating body 71 is pushed by the pressing bracket 102 . As a result, the seatback-side rotating body 71 rotates about the reclining shaft 20a in the direction of the arrow f1 in FIG.

The rotating motion of the seatback-side rotating body 71 is transmitted to the cable connection link 73 via the connecting link 72, whereby the cable connection link 73 rotates. More specifically, as shown in FIG. 5, the connecting link 72 is an elongated member, and one longitudinal end (strictly speaking, an upper end 72a) of the connecting link 72 is connected to the seatback-side rotating body 71. Concatenated. Therefore, when the seatback-side rotating body 71 rotates, the connecting link 72 moves in the direction of the arrow f2 in FIG.

On the other hand, the other longitudinal end of the connecting link 72 (strictly speaking, the lower end 72b) is connected to the rear lower end of the substantially fan-shaped cable connecting link 73, as shown in FIG. The cable connection link 73 is rotatably supported by the link attachment bracket 74 via a rotation shaft 73a provided at a portion of the upper end located slightly forward of the rear end. . Then, when the connecting link 72 moves in the direction of arrow f2, the cable connection link 73 rotates in the direction of arrow f3 in FIG. 6 around the rotation shaft 73a.

Further, as shown in FIG. 5, the front end of the cable connection link 73 is connected to the first cable C1 and the stopper release cable Cs. More specifically, the two cables C1 and Cs each have an inner cable functioning as a cable body and an outer cable covering the inner cable. The tip of the outer cable of each cable is held by a cable holding portion 74a formed by bending the front end of the link mounting bracket 74 outward in the width direction. Also, the tip of the inner cable of each cable is fastened to cable fastening portions 73 b and 73 c formed at the front end of the cable connection link 73 . When the cable connection link 73 rotates, the stopper release cable Cs and the first cable C1 are pulled in the directions of arrows f4 and f5 in FIG. 6, respectively.

On the other hand, during normal operation (strictly speaking, when the recline angle of the seat back 2 is smaller than the predetermined angle), the stopper release cable Cs and the first cable C1 are each pulled by the arrow f4 in FIG. 6 by the corresponding urging members. , f5 are biased in the opposite direction. As a result, each movable part (that is, the seatback-side rotating body 71, the connecting link 72, and the cable connecting link 73) in the first interlocking unit 70 normally remains positioned at the standby position shown in FIG. .

(About the second interlocking unit)
Next, the second interlocking unit 80 will be described with reference to FIGS. 7 and 8. FIG. The second interlocking unit 80 is arranged around the slide rail mechanism 30 and is a mechanism that interlocks with the rotational movement of the seat back 2 . The second interlocking unit 80 has a slide member 81, a motion converting member 82, and an elevating bracket 83, as shown in FIGS.

The slide member 81 is a member made of a metal plate, and as shown in FIG. Also, the slide member 81 is configured to be slidable in the front-rear direction on the rail mounting bracket 15 . Specifically, the slide member 81 is biased forward by a biasing member (not shown). For this reason, the slide member 81 is normally positioned at the front end position within its slide movement range.

On the other hand, the rear end portion of the slide member 81 is provided with a cable retaining portion 81a as shown in FIG. The end of the inner cable of the stopper release cable Cs opposite to the side fastened to the cable connection link 73 is fastened to the cable fastening portion 81a. When the stopper release cable Cs is pulled in the direction of arrow f4 in FIG. 8 (the direction corresponding to arrow f4 in FIG. 6), the slide member 81 resists the biasing force of the biasing member. Slide backward.

The sliding motion of the slide member 81 is converted into a lifting motion of the lifting bracket 83 by the motion converting member 82 . Specifically, as shown in FIG. 7, the motion conversion member 82 is a member shaped like a numeral "6", and its lower end is connected to the upper rail 32 (strictly , is rotatably supported by a portion located above the lower rail 31). An engaging portion 82b formed at the upper end of the motion conversion member 82 is engaged with the front end of the slide member 81. More specifically, the inner edge of an engagement hole (not shown) formed in the slide member 81 It is attached to the surface.

On the other hand, the elevating bracket 83 is a vertically moving member that moves up and down in conjunction with the sliding motion of the slide member 81 , and is arranged in front of the motion conversion member 82 . A loose hole 83a extending vertically is formed in the upper end of the lifting bracket 83 as shown in FIG. A cylindrical projection 32a projecting outward in the width direction from the upper end of the upper rail 32 is inserted into the loose hole 83a. A semicircular notch 83b is formed at the rear end of the lifting bracket 83. As shown in FIG. A protrusion 82c protruding forward from the front end of the motion conversion member 82 is engaged with the inner edge surface of the notch 83b.

When the slide member 81 slides rearward, the motion conversion member 82 moves in the direction of the arrow f11 in FIG. will start to rotate. Further, when the motion conversion member 82 rotates, the protrusion 82c of the motion conversion member 82 pushes up the inner edge surface of the notch 83b formed in the elevation bracket 83. As shown in FIG. As a result, the elevating bracket 83 is lifted (moved in the direction of arrow f12 in FIG. 8) while the cylindrical projection 32a is guided by the inner edge surface of the loose hole 83a.

On the other hand, normally (that is, when the slide member 81 is at the front end position of its sliding movement range), the elevating bracket 83 is positioned at the lower end position of the elevating range as shown in FIG.

By the way, when the seat body Sh moves forward in the walk-in section R1 and reaches the front end position of the walk-in section R1 when the lifting bracket 83 is at the lower end position, the locked portion formed at the lower end of the lifting bracket 83 The portion 83c is engaged with the stopper SP within the lower rail 31, as shown in FIG. 9A. This stopper SP corresponds to a movement restricting member, is provided on the bottom wall of the lower rail 31, and more specifically, is arranged at the front end (one end) of the walk-in section R1. When the locked portion 83c is locked by the stopper SP, the seat body Sh cannot move further forward, that is, cannot cross the walk-in section R1.

On the other hand, when the seat main body Sh moves forward in the walk-in section R1 and reaches the front end position of the walk-in section R1 when the lift bracket 83 is at the upper end position, the engaged portion 83c is positioned as shown in FIG. 9B. As shown in , it comes to climb over the stopper SP. In this state, the seat body Sh can move further forward beyond the walk-in section R1 (in other words, within the luggage compartment forming section R2).

As described above, in the present embodiment, the elevating bracket 83 vertically moves between the position where it is locked by the stopper SP and the position where it gets over the stopper SP. Then, only when the lift bracket 83 is in a position to get over the stopper SP, the seat body Sh can slide to a position beyond the front end of the walk-in section R1.

Each movable part of the second interlocking unit 80 including the elevating bracket 83 operates in conjunction with the rotational movement of the seat back 2 as described above. More specifically, when the seat back 2 rotates in the first direction and the stopper release cable Cs is pulled in the direction of the arrow f4 in the first interlocking unit 70, each movable portion of the second interlocking unit 80 will start working. At this time, the lift bracket 83 is lifted by a distance corresponding to the recline angle of the seat back 2 .

With the configuration described above, in the present embodiment, the seat body Sh is permitted to enter the luggage compartment formation section R2 only when the recline angle of the seat back 2 is equal to or greater than a predetermined value. It should be noted that the recline angle of the seat back 2, which is set as a condition for allowing the seat body Sh to enter the luggage compartment forming section R2, is suitable for effectively preventing the occupant from sitting on the main seat S. angle is preferably set.

(About the third interlocking unit)
Next, the third interlocking unit 90 will be described with reference to FIGS. 10 and 11. FIG. The third interlocking unit 90 is a mechanism that interlocks with the sliding motion of the seat body Sh. Strictly speaking, the third interlocking unit 90 moves when the seat body Sh slides forward in the walk-in section R1 and reaches the front end of the section. 10 and 11, the third interlocking unit 90 has a trigger link 91, a cable connection link 92, intermediate links 93, 94, 95, and a standing-up restricting link 96. As shown in FIGS.

The trigger link 91 is a member that extends long in the vertical direction, and is rotatably supported by the upper rail 32 (strictly speaking, a portion positioned above the lower rail 31) via a support shaft 91a. there is The trigger link 91 rotates about the support shaft 91a when the seat body Sh moving forward in the walk-in section R1 passes the front end of the section. More specifically, a portion of the bottom wall of the lower rail 31 located beyond the front end of the walk-in section R1 is formed with an inclined step DC as shown in FIG. This step DC corresponds to a member disposed at a position beyond the front end of the walk-in section R1, that is, at a predetermined position in the luggage compartment forming section R2.

When the trigger link 91 advances as the seat body Sh slides forward and reaches the arrangement position of the step DC, the trigger link 91 receives an action from the step DC. Specifically, a contact portion 91b is formed at the lower end portion of the trigger link 91. As shown in FIG. The contact portion 91b contacts the rear end of the step DC when the trigger link 91 reaches the arrangement position of the step DC. When the seat body Sh further slides forward after the contact portion 91b contacts the step DC, as shown in FIG. The trigger link 91 rotates in the direction of the arrow f9 in FIG. 11 so as to ride up.

The pivoting motion of the trigger link 91 described above is transmitted to the cable connection link 92 . As a result, the cable connection link 92 pulls the second cable C2. More specifically, the cable connection link 92 is rotatably supported by a predetermined portion (for example, the side frame 11 of the seat cushion frame 10) in the seat body Sh via a support shaft 92a. An engagement end portion 92b is formed at the lower end portion of the cable connection link 92. As shown in FIG. The engaging end portion 92b is engaged with an engaging end portion 91c formed at the upper end portion of the trigger link 91, as shown in FIG. Further, the upper end of the cable connection link 92 is provided with a cable retainer 92c as shown in FIG. The end of the inner cable of the second cable C2 is fastened to this cable fastening portion 92c.

When the trigger link 91 rotates in the direction of arrow f9 in FIG. 11, the cable connection link 92 rotates such that the upper end portion provided with the cable retaining portion 92c falls backward. As a result, the second cable C2 is pulled in the direction of arrow f8 in FIG. As described above, the trigger link 91 and the cable connection link 92 function as an operating body that operates under the action of the step DC when the seat body Sh, which is moving forward, approaches the step DC. By operating both links, the second cable C2 is towed.

Further, when the cable connection link 92 rotates, the rotation is transmitted to the erection restricting link 96 via the plurality of intermediate links 93, 94, 95, and as a result, the erection restricting link 96 operates. Specifically, among the plurality of intermediate links 93, 94, and 95, the intermediate link 93 located on the frontmost side extends long in the front-rear direction. One longitudinal end (front end) of the intermediate link 93 is attached to a link attachment portion 92d provided in the cable connection link 92 slightly above the support shaft 92a.

A substantially V-shaped intermediate link 94 is arranged immediately behind the intermediate link 93 located on the frontmost side. The intermediate link 94 is rotatably supported by a predetermined portion (for example, the side frame 11 of the seat cushion frame 10) in the seat body Sh via a support shaft 94a provided at its bent portion. In addition, the longitudinal direction end (rear end) of the intermediate link 93 located on the frontmost side is attached to the end located further forward among the ends of the substantially V-shaped intermediate link 94. A portion 94b is formed. A link attachment portion 94c to which the lower end portion of an intermediate link 95 extending in the vertical direction is attached is formed at the other end portion positioned further rearward.

The standing-up restricting link 96 extends in the front-rear direction and has a substantially dumbbell shape when viewed from the side. 10 is rotatably supported by a side frame 11). A link attachment portion 96b is formed at the front end portion of the standing-up restricting link 96. As shown in FIG. An upper end portion of an intermediate link 95 extending vertically is attached to the link attachment portion 96b. In addition, a lateral trapezoidal restricting portion 96c is formed at the rear end portion of the standing-up restricting link 96. As shown in FIG.

When the cable connection link 92 rotates, the intermediate link 93 moves rearward in conjunction with this, the rear intermediate link 94 rotates around the support shaft 94a, and the rear intermediate link 95 rotates around the support shaft 94a. moves downward. As a result, the standing-up restricting link 96 rotates around the support shaft 96a, specifically in the direction of the arrow f10 in FIG.

The third interlocking unit 90 configured as described above functions as a rotation movement restricting mechanism of the present invention, and when the seat body Sh is in the luggage compartment formation section R2 beyond the front end position of the walk-in section R1, It restricts the erecting motion of the seat back 2 (that is, the rotating motion in the second direction). More specifically, when the seat body Sh passes the front end position of the walk-in section R1, the seat back 2 is in a forward-leaning posture, and its lodging angle is greater than or equal to a predetermined size.

On the other hand, the seatback frame 100 has an engagement block 97 shown in FIG. The engagement block 97 is a comma symbol-shaped member when viewed from the side, and as shown in FIG. In other words, the outer peripheral surface of the engagement block 97 is formed with an angular depression 97a.

The recess 97a is located at the lowest position on the outer peripheral surface of the engagement block 97 as shown in FIG. On the other hand, when the seat back 2 is tilted forward and the receding angle is equal to or greater than the predetermined angle, the recess 97a is positioned slightly rearward and upward from its normal position. Also, at this time, the standing-up restricting link 96 rotates around the support shaft 96a, and its rear end portion (that is, the restricting portion 96c) is somewhat lifted. When the recess 97a and the restricting portion 96c are located at the above positions, they are engaged with each other as shown in FIG. become involved.

When the recess 97a and the restricting portion 96c are engaged with each other, a portion of the outer peripheral portion of the engaging block 97 adjacent to the recess 97a (specifically, a raised portion 97b that protrudes in a rectangular shape) is the restricting portion 96c. It will be locked to the rear surface of the. As a result, the upright motion of the seat back 2 is restricted.

As described above, when the seat body Sh passes over the front end of the walk-in section R1, the third interlocking unit 90 receives the action from the step DC described above and pulls the second cable C2 in the direction of the arrow f8 in FIG. At the same time, the upright motion of the seat back 2 is restricted. That is, when the seat body Sh passes the front end of the walk-in section R1 and is in the luggage compartment forming section R2, the seat back 2 is restricted from being raised from the forward tilted posture, and is kept in the forward tilted posture. become. As a result, it is possible to appropriately suppress (prevent) the occupant from sitting on the main seat S while the seat body Sh is in the luggage compartment forming section R2.

(Regarding the relay unit)
Next, the relay unit 40 will be explained. The relay unit 40 is a mechanism that operates in conjunction with the rotational movement of the seat back 2 and the sliding movement of the seat body Sh. More specifically, the relay unit 40 relays between the first interlocking unit 70 and the slide lock mechanism, and when the seat back 2 rotates in the first direction and the recline angle becomes a predetermined magnitude or more. The operation of the first interlocking unit 70 is transmitted to the slide lock mechanism. As a result, when the seatback 2 rotates in the first direction until the recline angle reaches or exceeds a predetermined value, the slide lock is released in conjunction with this.

Further, the relay unit 40 relays between the second interlocking unit 80 and the slide lock mechanism, and when the seat body Sh slides forward in the walk-in section R1 and reaches the front end of the section, The operation of the second interlocking unit 80 is used to reset the released slide lock (in other words, cancel the release of the slide lock).

As described above, the relay unit 40 corresponds to the regulation switching mechanism of the present invention, and operates to switch setting and release of the slide lock. In the following, first, the arrangement position and the like of the relay unit 40 will be described with reference to FIG. 3 already described.

In this embodiment, the relay unit 40 is attached to the lower portion of the seat cushion 1 as shown in FIG. More specifically, the relay unit 40 has a casing 43 for attaching members in the unit to the seat body Sh. The casing 43 is made of a steel plate processed and formed into a substantially dish shape, and each part of the relay unit 40 is accommodated inside. By providing the casing 43, adhesion of foreign matter to each part of the relay unit 40 (strictly speaking, the parts accommodated in the casing 43) is suppressed.

On the other hand, as shown in FIG. 3, the seat cushion frame 10 has a front frame 12 bent in a U shape at its front end. The front frame 12 has side portions 13 forming both ends in the width direction, and a front end connecting portion 14 forming a front end portion. The front end connecting portion 14 connects the side portions 13 at the front end portion of the seat cushion frame 10 . 3, a rear connecting portion 16 is welded to the lower portion of the front frame 12 to connect the side portions 13 at a position rearward of the front end connecting portion 14. As shown in FIG.

In this embodiment, as shown in FIG. 3, the casing 43 and the components inside the casing 43 are arranged between the front end connecting portion 14 and the rear connecting portion 16 in the front-rear direction. As described above, in this embodiment, the space between the front end connecting portion 14 and the rear connecting portion 16 of the seat cushion frame 10 can be used to allow the relay unit 40 to be arranged more compactly. Accordingly, it is possible to effectively suppress an increase in the size of the main sheet S due to the provision of the relay unit 40 .

Further, in this embodiment, each part of the relay unit 40 including the casing 43 is arranged under the seat cushion 1 . For this reason, the relay unit 40 becomes less conspicuous, and it is possible to suppress the impact on the feeling of seating that the occupant feels when he/she sits on the main seat S.

Next, a specific configuration of the relay unit 40 will be described with reference to FIGS. 12 to 14. FIG. 12 to 14 are diagrams when the relay unit 40 is viewed from above (that is, when viewed from the seating side). In the following description, "upper" means higher in a direction orthogonal to the bottom surface of the casing 43, and "lower" means lower in the same direction. do.

As shown in FIGS. 12 to 14, the relay unit 40 includes a fixed rotating shaft 41, a movable rotating shaft 42, a first rotating body 44, a second rotating body 45, and a third rotating body 46 in addition to the casing 43 described above. , an engaging pin 47, a first coil spring 51, a second coil spring 52, a third coil spring 53, a first cable C1, a second cable C2 and a third cable C3.

The fixed rotating shaft 41 is a shaft body fixed to the casing 43 and functions as a rotating shaft for the first rotating body 44 and the third rotating body 46 . In other words, this fixed rotating shaft 41 functions as a common rotating shaft when the first rotating body 44 and the third rotating body 46 rotate, and both rotating bodies rotate around the fixed rotating shaft 41. It rotates (more specifically, around the fixed rotation shaft 41). With such a configuration, the number of parts is reduced compared to the case where each of the first rotating body 44 and the third rotating body 46 is individually provided with a rotating shaft. become.

In addition, in this embodiment, the fixed rotary shaft 41 is provided at a position close to the center position of the casing 43 . More specifically, the portion of the casing 43 to which the fixed rotary shaft 41 is fixed is one step higher than its surroundings, forming a base for the fixed rotary shaft 41 . In addition, the fixed rotating shaft 41 passes through the first rotating body 44 and the second rotating body 45, and the upper ends thereof are crimped to prevent both rotating bodies from coming off the fixed rotating shaft 41. there is

The movable rotating shaft 42 is a shaft attached to the third rotating body 46, and rotates integrally when the third rotating body 46 rotates. The movable rotating shaft 42 passes through the second rotating body 45 and functions as a rotating shaft when the second rotating body 45 rotates relative to the first rotating body 44 . The upper end of the movable rotating shaft 42 is crimped, thereby preventing the second rotating body 45 from coming off the movable rotating shaft 42 .

The casing 43 has a substantially rectangular outer shape in plan view. Further, as shown in FIG. 12, a portion of the casing 43 positioned slightly forward of the portion to which the fixed rotary shaft 41 is fixed is cut and raised to form a projecting portion (hereinafter referred to as a first projecting portion 48). are doing. The first projecting portion 48 is a claw-shaped projecting portion projecting from the bottom surface of the casing 43 (in other words, the surface to which the first rotating body 44, the second rotating body 45, and the third rotating body 46 are attached). is. 13, when the first rotating body 44 rotates around the fixed rotating shaft 41 (strictly, when rotating clockwise in FIG. 12), the first projecting portion 48 It abuts on the outer edge of the first rotating body 44 . That is, the first projecting portion 48 defines one end position of the rotation range of the first rotating body 44 and restricts further rotation of the first rotating body 44 after reaching the position.

A portion of the casing 43 located obliquely in front of the portion to which the fixed rotating shaft 41 is fixed is also cut and raised to form a protrusion (hereinafter referred to as a second protrusion 49). The second projecting portion 49 is a projecting portion protruding from the bottom surface of the casing 43 in an arch shape. Then, as shown in FIG. 12, the second projecting portion 49 is in contact with the lower surface of the third rotating body 46 at normal times. That is, the third rotating body 46 comes into sliding contact with the second projecting portion 49 when rotating around the fixed rotating shaft 41 . In this way, when the third rotating body 46 rotates, the second projecting portion 49 abuts on the second rotating body 45, so that the rotation path of the third rotating body 46 is restricted by the second projecting portion 49. . As a result, the third rotating body 46 appropriately rotates along the above-described rotation path.

In addition to the second projecting portion 49 described above, a guide slit 50 is further provided in the casing 43 as a structure for properly rotating the third rotating body 46 along its rotating path. The guide slit 50 is formed in the casing 43 on the side of the fixed rotary shaft 41 and extends in an arc shape along the rotary path of the third rotary body 46 . An edge of the guide slit 50 is engaged with a slit engaging portion (not shown) provided on the third rotating body 46 . Then, the third rotating body 46 rotates appropriately along the prescribed rotation path by causing the slit engaging portion to follow the edge of the guide slit 50 .

3 and 12, each of the first cable C1, the second cable C2 and the third cable C3 is pulled into the casing 43 from the outside of the casing 43. As shown in FIG. These cables are respectively connected to the corresponding rotating bodies among the first rotating body 44 , the second rotating body 45 and the third rotating body 46 within the casing 43 .

In this embodiment, all of the three cables are pulled in from the same direction when viewed from the casing 43 (specifically, from the front). That is, the first cable C1, the second cable C2 and the third cable C3 are directed toward the corresponding rotating body from the same direction with respect to the first rotating body 44, the second rotating body 45 and the third rotating body 46, respectively. It means that you are drawn in. By arranging the cables as described above, the space for arranging the cables around the casing 43 can be reduced, and the cables can be pulled into the casing 43 appropriately.

The first rotating body 44 is a rotating body that rotates around the fixed rotating shaft 41 and is made of steel. The first rotating body 44 rotates in conjunction with the rotating motion of the seat back 2 when the seat back 2 rotates in the first direction until the recline angle reaches or exceeds a predetermined value. Specifically, as shown in FIG. 12, at one end of the first rotating body 44 having a substantially C shape, the tip of the inner cable of the first cable C1 corresponding to the cable for the first rotating body is attached. It is connected (stopped). Here, when the seatback 2 rotates in the first direction until the recline angle reaches or exceeds a predetermined value, the first cable C1 is moved in the direction of the arrow f5 in FIG. 6 by the first interlocking unit 70 described above. towed by By pulling the first cable C1, the first rotating body 44 rotates clockwise around the fixed rotating shaft 41, as shown in FIG.

As described above, the rotating motion (forward tilting motion) of the seat back 2 is transmitted to the first rotating body 44 via the first cable C1, and the first rotating body 44 rotates. That is, the first cable C<b>1 is connected to the first rotating body 44 in order to link the rotating motion of the first rotating body 44 with the rotating motion of the seat back 2 .

In addition, when the first rotating body 44 rotates clockwise around the fixed rotating shaft 41 , it rotates to a position where its outer edge comes into contact with the first projecting portion 48 . After that, as long as the first cable C1 continues to be pulled (in other words, while the seat back 2 is tilted forward at a tilting angle equal to or larger than a predetermined size), the first rotating body 44 is pulled by the first protruding portion 48. is held in the abutting position.

A semicircular notch 44a is formed at the end of the first rotating body 44 opposite to the side to which the first cable C1 is connected. Furthermore, one end of the third coil spring 53 is hooked to the peripheral portion of the portion of the first rotating body 44 through which the fixed rotating shaft 41 penetrates.

The second rotating body 45 is a member that can be engaged with and disengaged from the first rotating body 44, and is made of steel. The second rotating body 45 rotates integrally with the first rotating body 44 when it is engaged with the first rotating body 44, and when disengaged from the first rotating body 44, the first rotating body 45 rotates. relative to 44. More specifically, the second rotating body 45 has an outer shape extending substantially linearly, and as shown in FIG. 12, an engaging pin 47 is attached to the end in the extending direction. The engagement pin 47 is a substantially cylindrical pin that protrudes from the upper surface of the second rotating body 45 .

Normally, the engaging pin 47 is engaged with the end portion of the first rotating body 44 . It is fitted in a notch 44a formed in the bottom and abuts on the inner edge surface of the notch 44a. When the first rotating body 44 rotates in this state, as shown in FIG. 13, the second rotating body 45 also rotates clockwise along the rotating path around the fixed rotating shaft 41. .

On the other hand, the second rotating body 45 is supported by the movable rotating shaft 42 as shown in FIG. At the end of the second rotating body 45 opposite to the side where the engaging pin 47 is attached, the tip of the inner cable of the second cable C2 corresponding to the cable for the second rotating body is attached. Concatenated. Here, the second cable C2 is pulled by the third interlocking unit 90 in the direction of arrow f8 in FIG. be done.

By pulling the second cable C2, the second rotating body 45 rotates clockwise about the movable rotating shaft 42, as shown in FIG. Due to this rotating operation, the engagement state between the first rotating body 44 and the second rotating body 45 is released, and as shown in the figure, the second rotating body 45 moves relative to the first rotating body 44. relative rotation in the clockwise direction. When the second rotating body 45 rotates relative to the first rotating body 44, as shown in FIG. , under the end of the second rotating body 45 to which the engaging pin 47 is attached.

One end of a third coil spring 53 is hooked to a portion of the second rotating body 45 around the portion through which the movable rotating shaft 42 penetrates.

The third rotating body 46 is a rotating body that rotates around the fixed rotating shaft 41 and is made of steel. As shown in FIGS. 12 to 14, the third rotating body 46 has a semicircular outer shape and is arranged below the first rotating body 44 and the second rotating body 45. As shown in FIGS. That is, above the third rotating body 46, the remaining two rotating bodies are arranged in an overlapping state.

The third rotating body 46 is rotatably supported on the fixed rotating shaft 41, and the first rotating body 44 is also coaxially supported. Here, the first rotating body 44 and the third rotating body 46 are supported by the fixed rotating shaft 41 in a separated state. Therefore, the two rotating bodies can rotate (relatively rotate) about the fixed rotating shaft 41 independently of each other.

In addition, as shown in FIG. 12, a movable rotating shaft 42 is erected on a portion of the third rotating body 46 located obliquely rearward from the portion through which the fixed rotating shaft 41 penetrates. As described above, the movable rotating shaft 42 supports the second rotating body 45 in a rotatable state.

The third rotating body 46 configured as described above rotates around the fixed rotating shaft 41 to reciprocate between the slide lock set position and the unlocked position. Here, the "set position" is the position of the third rotating body 46 at the time of setting the slide lock, specifically the position of the third rotating body 46 shown in FIG. The "release position" is the position of the third rotating body 46 when the slide lock is released, specifically the position of the third rotating body 46 shown in FIG.

More specifically, as shown in FIG. 12, one end of the inner cable of the third cable C3 corresponding to the third rotating body cable is connected to the lateral front end of the third rotating body 46. there is On the other hand, as shown in FIG. 4, the other end of the inner cable of the third cable C3 is connected to the pressing bracket 38 of the slide lock mechanism. Here, the pressing bracket 38 is in a state of being constantly urged by an urging member (not shown). For this reason, the pressing bracket 38 is normally positioned at the slide lock setting position (specifically, the pressing portion 38a of the pressing bracket 38 is somewhat above the projecting portion 33b of the lock lever 33) due to the biasing force of the biasing member. It will be held in the position when it is floating for minutes). Also, the third cable C3 connected to the pressing bracket 38 is also urged by the above urging force, and is pulled in the direction of the arrow f6 in FIG.

On the other hand, when the third rotating body 46 rotates about the fixed rotating shaft 41 from the setting position toward the releasing position (rotates clockwise for easy understanding), the third cable C3 is rotated as described above. is pulled in the direction of arrow f7 in FIG. As a result, the pressing bracket 38 rotates, and the pressing portion 38a presses down the projecting portion 33b of the lock lever 33. As shown in FIG. As a result, the lock lever 33 reaches the unlocked position and the slide lock is released. As described above, when the third rotating body 46 rotates toward the release position, the third cable C3 is pulled by the third rotating body 46, thereby activating each part of the slide lock mechanism and releasing the slide lock. Become so.

By the way, the rotation operation of the third rotating body 46 toward the release position is realized by integrally rotating the first rotating body 44 and the second rotating body 45 in an engaged state. Specifically, when the first rotating body 44 and the second rotating body 45 are engaged with each other and the first rotating body 44 rotates clockwise, the second rotating body 45 rotates around the fixed rotating shaft 41. It also rotates clockwise along the rotation path. At this time, the second rotating body 45 pushes the third rotating body 46 clockwise through the movable rotating shaft 42 . That is, the second rotating body 45 rotates integrally with the first rotating body 44 while taking the third rotating body 46 with it. As a result, the third rotating body 46 rotates clockwise about the fixed rotating shaft 41 and finally reaches the release position.

Conversely, when the engagement state between the first rotating body 44 and the second rotating body 45 is released, the third rotating body 46 is released from the pressure by the second rotating body 45 and returns to the set position. become. Specifically, the second rotating body 45 is disengaged from the first rotating body 44 by rotating relative to the first rotating body 44 about the movable rotating shaft 42 . As a result, the second rotating body 45 stops rotating along the rotating path about the fixed rotating shaft 41 . As a result, the pressure from the second rotating body 45 to the third rotating body 46 disappears. On the other hand, the biasing force applied to the pressing bracket 38 acts on the third rotating body 46 via the third cable C3. Therefore, the third rotating body 46 released from the pressing force by the second rotating body 45 rotates counterclockwise around the fixed rotating shaft 41 by the biasing force described above, and returns to the set position. .

To explain the structure of the third rotating body 46 in more detail, a portion of the third rotating body 46 located slightly behind the portion where the tip of the inner cable of the third cable C3 is connected has a screw as shown in FIG. , the end of the first coil spring 51 is latched. Further, the ends of the second coil spring 52 and the third coil spring 53 are hooked to the rear end of the third rotating body 46, as shown in FIG.

Further, as shown in FIG. 12, of the width direction both side ends of the third rotating body 46, the side end located on the side opposite to the side to which the inner cable of the third cable C3 is connected has a third The outer cable of the second cable C2 is held.

Further, a portion of the third rotating body 46 slightly closer to the third cable C3 than the portion through which the fixed rotating shaft 41 penetrates is cut upward to form a claw-like protrusion 46a. Normally, the claw-shaped protrusion 46a is in contact with the outer edge of the first rotating body 44 as shown in FIG. In such a state, the rotating motion of the first rotating body 44 with respect to the third rotating body 46 (strictly speaking, the counterclockwise rotating motion) is restricted.

The first coil spring 51 is a biasing member hooked to the casing 43 and the third rotating body 46 obliquely behind the fixed rotating shaft 41 . The first coil spring 51 urges the third rotating body 46 counterclockwise about the fixed rotating shaft 41 . Therefore, the third rotating body 46 resists the biasing force of the first coil spring 51 when rotating clockwise around the fixed rotating shaft 41 (that is, when rotating toward the release position). will rotate. On the other hand, when returning from the release position to the setting position, the third rotating body 46 receives the biasing force of the first coil spring 51 and quickly returns to the setting position.

The second coil spring 52 is a biasing member hooked to the rear end of each of the second rotating body 45 and the third rotating body 46 . The second coil spring 52 urges the second rotating body 45 toward the one end position within the rotation range when it rotates about the movable rotating shaft 42 . Here, the one end position in the rotation range means a position where the second rotation body 45 can be engaged with the first rotation body 44, specifically, an engagement position attached to the second rotation body 45 as shown in FIG. This is the position where the notch 44 a formed at the end of the first rotating body 44 is fitted into the dowel pin 47 . Then, the second rotating body 45 is normally positioned at one end position in the rotating range by the biasing force of the second coil spring 52 . On the other hand, the second rotating body 45 rotates against the biasing force of the second coil spring 52 when rotating about the movable rotating shaft 42 from one end position to the other end position in the rotation range. It will be.

The third coil spring 53 is a biasing member hooked to the first rotating body 44 and the third rotating body 46 behind the fixed rotating shaft 41 . The third coil spring 53 causes the first rotating body 44 to be positioned relative to the third rotating body 46 at a predetermined position (specifically, a position where it abuts on the claw-shaped protrusion 46a as shown in FIG. 12). is energized by Therefore, when the first rotating body 44 rotates relative to the third rotating body 46 , it rotates against the biasing force of the third coil spring 53 . In other words, the third rotating body 46 rotates against the biasing force of the third coil spring 53 when rotating with respect to the first rotating body 44 .

Next, the operation of each section of the relay unit 40 will be described in association with the rotating operation of the seat back 2 and the sliding operation of the seat body Sh. In the following description, a case in which the seat body Sh is slid forward from the normal position and positioned in the luggage compartment forming section R2 will be described as an example.

First, the seat back 2 rotates in the first direction when the seat body Sh is in the normal position (that is, the predetermined position within the walk-in section R1). Eventually, the tilting angle of the seatback 2 reaches a predetermined size, specifically, the tilting angle at which the pressing bracket 102 in the first interlocking unit 70 comes into contact with the seatback-side rotating body 71 . When the seatback 2 further tilts forward from that point, the pressing bracket 102 presses the seatback-side rotating body 71 forward. As a result, the first interlocking unit 70 pulls the first cable C1 in the direction of arrow f5 in FIG.

When the first cable C1 is pulled, the first rotating body 44 rotates clockwise about the fixed rotating shaft 41 in the relay unit 40 as shown in FIG. At this point, the notch 44 a formed at the end of the first rotating body 44 is engaged with the engaging pin 47 . That is, the second rotating body 45 and the first rotating body 44 are in an engaged state. Therefore, when the first rotating body 44 rotates, the second rotating body 45 rotates along the rotation path around the fixed rotating shaft 41 . At this time, the second rotating body 45 rotates while pushing the movable rotating shaft 42 . As a result, the third rotating body 46 rotates clockwise around the fixed rotating shaft 41 while resisting the biasing force of the first coil spring 51 . That is, the second rotating body 45 rotates integrally with the first rotating body 44 while rotating together with the third rotating body 46 . As a result, the third rotating body 46, which was initially at the setting position, rotates to reach the releasing position. By rotating to the release position, the third rotating body 46 pulls the third cable C3 in the direction of the arrow f7 in FIG.

As described above, the slide lock is released by pulling the third cable C3 as described above, and the seat body Sh is brought into a state in which it can freely slide in the front-rear direction. Then, the seat body Sh moves forward in the walk-in section R1, and eventually crosses the front end of the section R1. At this time, the contact portion 91b formed at the lower end of the trigger link 91 reaches the step DC provided on the bottom surface of the lower rail 31 and comes into contact with the step DC. When the seat body Sh further slides forward from this point, the trigger link 91 rotates so that the contact portion 91b rides up the step DC. As a result, the third interlocking unit 90 pulls the second cable C2 in the direction of arrow f8 in FIG.

When the second cable C2 is pulled, in the relay unit 40, the second rotating body 45 rotates about the movable rotating shaft 42 while resisting the biasing force of the second coil spring 52 as shown in FIG. do. That is, the second rotating body 45 rotates relative to the first rotating body 44 . As a result, the notch 44 a is separated from the engagement pin 47 and the second rotating body 45 is released from the engagement state with the first rotating body 44 . By releasing the engagement state between the first rotating body 44 and the second rotating body 45, the end portion of the first rotating body 44 on the side where the notch 44a is formed becomes the second rotating body. It comes to crawl under 45.

In addition, since the engagement state between the first rotating body 44 and the second rotating body 45 is released, the second rotating body 45 no longer pushes the movable rotating shaft 42 . As a result, the third rotating body 46, which has been in the released position until then, is moved by the biasing force of the first coil spring 51 and the biasing force transmitted from the slide lock mechanism side through the third cable C3 (see FIG. 14). The urging force in the direction of arrow f6) rotates in the opposite direction. That is, the third rotating body 46 rotates relative to the first rotating body 44 from the release position toward the setting position. Then, when the third rotating body 46 reaches the set position, the third cable C3 is again pulled toward the slide lock mechanism.

As described above, the slide lock is set again by pulling the third cable C3 as described above. That is, after the recline angle of the seat back 2 reaches or exceeds a predetermined value, the slide lock that has been released is reset when the seat body Sh enters the luggage compartment forming section R2. As a result, it is possible to hold (lock) the position of the seat body Sh within the luggage compartment forming section R2.

1 seat cushion 2 seat back 1a, 2a pad material 1b, 2b skin material 3 headrest 10 seat cushion frame 11 side frame 12 front frame 13 side portion 14 front end connecting portion 15 rail mounting bracket 16 rear connecting portion 20 reclining mechanism 20a reclining shaft 21 Release lever 30 Slide rail mechanism 31 Lower rail 32 Upper rail 32a Cylindrical projection 33 Lock lever 33a Supported portion 33b Projecting portion 34 Lever support bracket 35 Support shaft 37 Rotation shaft 38 Pressing bracket 38a Pressing portion 39 Release lever 40 Relay unit 41 Fixed rotation Shaft 42 Movable rotating shaft 43 Casing 44 First rotating body 44a Notch 45 Second rotating body 46 Third rotating body 47 Engagement pin 48 First projection (projection)
49 second protrusion (protrusion)
50 guide slit 51 first coil spring 52 second coil spring 53 third coil spring 70 first interlocking unit 71 seat side rotating body 72 connecting link 72a upper end 72b lower end 73 cable connection link 73a rotating shaft 73b, 73c Cable holding portion 74 Link mounting bracket 74a Cable holding portion 80 Second interlocking unit 81 Slide member 81a Cable holding portion 82 Motion converting member 82a Support shaft 82b Engagement portion 82c Protrusion 83 Lifting bracket 83a Loose hole 83b Notch 83c Engaged portion 90 Third interlocking unit 91 Trigger link 91a Support shaft 91b Contact portion 91c Engagement end portion 92 Cable connection link 92a Support shaft 92b Engagement end portion 92c Cable fastening portion 92d Link attachment portion 93, 94, 95 Intermediate link 94a Support shaft 94b, 94c Link mounting portion 96 Standing restricting link 96a Support shaft 96b Link mounting portion 96c Regulating portion 97 Engagement block 97a Recess 97b Raised portion 100 Seat back frame 101 Side Frame 102 Pressing Bracket 103 Pressing Part C1 First Cable (Cable for First Rotating Body)
C2 Second cable (cable for second rotating body)
C3 Third cable (cable for third rotating body)
Cs Stopper release cable DC Step R1 Walk-in section (predetermined section)
R2 Luggage compartment forming section S Main seat Sh Seat body (vehicle seat)
SP Stopper

Claims (2)

a seat body having a seat back that rotates in a lying down direction;
a slide rail mechanism having a slide lock mechanism for restricting the slide movement of the seat body;
a seatback erection regulation mechanism that regulates the erection motion of the seatback;
an interlocking mechanism that interlocks with the rotational movement of the seatback and is connected to the slide lock mechanism and the seatback erection regulating mechanism;
The interlocking mechanism is
a rotating unit having a seatback-side rotating body pivotally supported so as to be relatively rotatable with respect to the seatback and operating in conjunction with the rotating movement of the seatback;
a relay unit rotatably supported by a fixed rotating shaft and relaying the operation of the rotating unit to the slide lock mechanism;
a first cable having one end connected to the rotating unit and the other end connected to the relay unit;
a second cable having one end connected to the relay unit and the other end connected to the seatback erection regulating mechanism;
a third cable having one end connected to the relay unit and the other end connected to the slide lock mechanism;
When the recline angle of the seatback exceeds a certain angle, the seatback-side rotating body rotates together with the seatback, and the rotating unit pulls the first cable in conjunction with the seatback-side rotating body. , the slide lock mechanism is released by rotating the relay unit connected to the other end of the first cable and pulling the third cable;
In the slide movement range in which the seat body can move along the slide rail mechanism, a luggage compartment forming section is formed in which the luggage compartment can be expanded by moving the seat body forward,
The seat back erection restriction mechanism includes:
An angular depression positioned at a predetermined lower position in the side frame of the seat back when the seat back is in an upright position, and positioned above the predetermined lower position when the seat back is in a forward leaning position. and,
When the seat body is in the luggage compartment forming section, the rear end portion of the seat body is raised to engage with the recess and move the recess upward from the predetermined lower position. a regulating portion for regulating the rotation of the seat back from the forward tilting posture to the standing posture by positioning the seat back at the position of the vehicular seat. A stepped portion is formed on a side portion of the slide rail mechanism,
The vehicle seat includes a trigger member that moves along the slide rail mechanism and is rotatably supported ,
2. The vehicle seat according to claim 1 , wherein the trigger member rotates by riding on the stepped portion and is driven to lift the rear end portion of the restricting portion .

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