JP2021066383A - Seat for vehicle - Google Patents

Abstract

To secure a space on a rear seat side and provide the compact arrangement of a driving part for hip-up and a driving part for lock release.SOLUTION: A seat S for vehicle comprises: a seat body Sh1 which has seat cushions 1RA, 1RB, and can switch between the seating state where an occupant can take the seat and the hip-up state where the rear end of the seat cushion is located on the upper side than the front end; a vehicle body side support member 4R which supports the seat body from a vehicle body floor side; a lock device 30 which locks the rear end of the seat cushion to the vehicle body side support member or the vehicle body floor; a driving part 40 for lock release which is connected to the lock device to release locking; and a driving part 50 for hip-up which rotates the seat cushion to turn the seat body into the hip-up state. The lock device is arranged on the rear side with respect to the center in the cross direction of the seat cushion. The driving part for lock release and the driving part for hip-up are arranged on the front side with respect to the center of the seat cushion or the vehicle body side support member.SELECTED DRAWING: Figure 8

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat that can be switched so that the rear end portion of the seat cushion is positioned above the front end portion from the seated state.

Conventionally, as a rear seat of an automobile, there is a vehicle provided with a seat capable of switching from a seated state in which an occupant can be seated to a hip-up state in which the rear end portion of the seat cushion is positioned above the front end portion. By lifting the rear end of the seat cushion to bring it into a hip-up state, occupants can enter and exit the rear seats. However, since the seat is quite heavy, it takes a lot of effort to tilt the seat until it is in a hip-up state.

Patent Document 1 describes a first motor and a control device for the first motor, in which the front end portion of the seat cushion is rotatably attached to the vehicle body and the seat can be moved from the seated state to the hip-up state. Vehicle seats are disclosed. The vehicle seat of Patent Document 1 also includes a lock device for locking the seat cushion, a second motor capable of unlocking the lock device, and a control device for the second motor. By operating the control device, the occupant can unlock the lock device by the second motor and drive the first motor to switch the seat from the seated state to the hip-up state with a minimum of effort.

U.S. Patent Application Publication No. 2019/0092191

In the vehicle seat described in Patent Document 1, a second motor (unlocking drive unit) for unlocking is arranged behind the seat cushion. Therefore, the space on the rear seat side of the seat was narrowed.

The present invention has been made in view of the above problems, and an object of the present invention is to secure a space on the rear seat side of the seat and to bring the seat body into a hip-up state, a hip-up drive unit and an unlocking drive unit. It is to provide a compact arrangement with.

According to the vehicle seat according to the present invention, the subject is a seated state in which a seat cushion is provided and a occupant can be seated, and a hip-up state in which the rear end portion of the seat cushion is located above the front end portion. A switchable seat body, a vehicle body side support member that supports the seat body from the vehicle body floor side, a lock device that locks the rear end portion of the seat cushion to the vehicle body side support member or the vehicle body floor, and the lock device. The lock device includes an unlocking drive unit that connects to and unlocks the lock device, and a hip-up drive unit that rotates the seat cushion to bring the seat body into the hip-up state. Is arranged behind the center of the seat cushion in the front-rear direction, and the unlocking drive unit and the hip-up drive unit are arranged in front of the center of the seat cushion or the vehicle body side support member in the front-rear direction. It will be solved by being done.

According to the vehicle seat described above, the unlocking drive unit and the hip-up drive unit are arranged in front of the center in the front-rear direction of the seat cushion or the vehicle body side support member. As a result, the space on the rear seat side of the seat is secured.
Further, since the unlocking drive unit and the hip-up drive unit are both arranged in the front, the unlocking drive unit and the hip-up drive unit are arranged as compared with the case where the lock release drive unit and the hip-up drive unit are arranged separately in the front and the rear. The placement area can be kept in a narrow range, and a compact placement can be provided.

Further, in the above-mentioned vehicle seat, a cushion support member for supporting the seat cushion from below is provided, and the front portion of the cushion support member is formed so as to be inclined forward in a side view, and is used for unlocking. The drive unit may be arranged in a space below the front portion of the cushion support member that rises forward.
By arranging the unlocking drive unit in the space below the front portion of the cushion support member that rises forward, it is possible to effectively utilize the space below the seat body to provide the unlocking drive unit. become.

Further, in the above-mentioned vehicle seat, it is preferable that a fixing bracket is provided below the seat cushion, and the unlocking drive unit and the electronic control unit are arranged on the fixing bracket.
With such a configuration, since only one member is required to fix the unlocking drive unit and the electronic control unit, an increase in the number of parts can be suppressed.

Further, in the vehicle seat, the vehicle body side support member is a slide rail that slides the seat cushion along the front-rear direction of the vehicle seat, and the seat cushion can be slidably moved by the slide rail. It is preferable that the vehicle seat is provided with a slide drive unit for sliding the slide rail, and the slide drive unit is arranged on the fixing bracket.
By fixing the slide drive unit with the fixing bracket, it is not necessary to separately provide a component for fixing the slide drive unit, and an increase in the number of parts can be suppressed.

Further, in the vehicle seat, the fixing bracket is formed to have a wider width in the front-rear direction at a portion corresponding to the unlocking drive portion than at a portion corresponding to the slide drive portion. It is good.
With such a configuration, it is possible to suppress an increase in the size of the fixing bracket.

Further, in the vehicle seat, the unlocking drive unit, the slide drive unit, and the electronic control unit may be arranged side by side in the width direction of the seat body on the fixing bracket.
With such a configuration, the lock release drive unit, the slide drive unit, and the electronic control unit can be compactly arranged in the front-rear direction of the seat body.

Further, in the vehicle seat, the unlocking drive unit may be attached to the cushion support member.
When the unlocking drive unit is attached to the cushion support member, the unlocking drive unit moves together with the seat cushion, so that the traction member connecting the lock device and the unlocking drive unit, for example, a cable or a rod, is damaged. It can be suppressed.

Further, in the above-mentioned vehicle seat, the cushion support member is formed of a plate-shaped pan frame, and the pan frame is formed with beads extending in the front-rear direction and protruding downward for unlocking. The drive unit may be arranged so as to overlap the bead in the vertical direction.
With such a configuration, the support rigidity of the unlocking drive unit can be improved.

Further, in the above-mentioned vehicle seat, the cushion support member is formed of a plate-shaped pan frame, and the pan frame is formed with beads extending in the front-rear direction and protruding downward for unlocking. The drive unit may be arranged so as to avoid the bead.
By arranging the unlocking drive unit so as to avoid the beads, the unlocking drive unit can be directly attached to the plate-shaped portion of the cushion support member, and the mountability of the unlocking drive unit is improved.

According to the vehicle seat described above, the unlocking drive unit and the hip-up drive unit are arranged in front of the center in the front-rear direction of the seat cushion or the vehicle body side support member. As a result, the space on the rear seat side of the seat is secured.
Further, since the lock release drive unit and the hip-up drive unit are both arranged in the front, the lock release drive unit and the hip-up drive unit are arranged as compared with the case where the lock release drive unit and the hip-up drive unit are arranged separately in the front and the rear. The area can be kept in a small area and a compact arrangement can be provided.
Further, by arranging the unlocking drive unit in the space below the front-raised portion of the cushion support member, it is possible to effectively utilize the space below the seat body to provide the unlocking drive unit. It will be possible.
Further, since the unlocking drive unit and the electronic control unit are arranged on the fixing bracket, only one component is required to fix the unlock drive unit and the electronic control unit, so that the number of parts can be increased. Can be suppressed.
Further, by fixing the slide drive unit with the fixing bracket, it is not necessary to separately provide a component for fixing the slide drive unit, so that an increase in the number of parts can be suppressed.
Further, since the portion corresponding to the unlocking drive portion is formed to have a wider width in the front-rear direction than the portion corresponding to the slide drive portion, it is possible to suppress an increase in the size of the fixing bracket.
Further, by arranging the unlocking drive unit, the slide drive unit, and the electronic control unit side by side in the width direction on the fixing bracket, each member can be compactly arranged in the front-rear direction.
Further, since the unlocking drive unit is attached to the cushion support member, the unlocking drive unit moves together with the seat cushion, so that the traction member connecting the lock device and the unlocking drive unit, for example, a cable, a rod, etc. Damage can be suppressed.
Further, by arranging the unlocking drive unit so as to overlap the bead formed on the cushion support member, the support rigidity of the unlocking drive unit can be improved.
Further, by arranging the unlocking drive unit so as to avoid the beads formed on the cushion support member, the mountability of the unlocking drive unit is improved.

It is a perspective view of the vehicle seat which concerns on one Embodiment of this invention. It is a perspective view which shows the frame of a vehicle seat. It is a side view of the frame of a vehicle seat, and is the figure which shows the state which the seat body of the right seat is hip-up. It is a perspective view which shows the front of the right sheet enlarged. It is a figure which shows the structure of the lock device. It is a figure which shows the structure of the drive unit for lock unlocking. It is a figure which shows the 4-section link mechanism which connects with the drive unit for hip-up. It is sectional drawing along the line VIII-VIII of FIG. It is a top view which shows the slide rail and the fixing bracket. It is sectional drawing which shows the arrangement of the drive unit for unlocking. It is a top view which shows the arrangement of the lock release drive unit. It is a top view which shows another arrangement of the lock release drive unit.

Hereinafter, an embodiment in which the vehicle seat according to the present invention is applied to a rear seat (including the second row and the third row) as a vehicle seat of an automobile will be described with reference to the drawings. However, the embodiments described below are for facilitating the understanding of the present invention and do not limit the present invention. That is, the present invention can be modified and improved without deviating from the gist thereof, and it goes without saying that the present invention includes an equivalent thereof. Further, in the following description, the content relating to the material, shape and size of the sheet component is merely one of specific examples, and does not limit the present invention. Further, the present invention is not limited to vehicle seats mounted on ground-based vehicles having wheels such as automobiles and railroads, and for example, seats mounted on aircraft and ships moving outside the ground. Can be applied.

In the following description, the "front-rear direction" is the front-rear direction of the vehicle seat (in other words, the front-rear direction of the seat body), and is a direction that coincides with the traveling direction when the vehicle is traveling. Further, the "seat width direction" is the width direction of the vehicle seat (in other words, the width direction of the seat body), which is the direction corresponding to the left-right direction seen from the occupant seated on the vehicle seat. Further, the "vertical direction" is a vertical direction of the vehicle seat, and is a direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane.
In addition, the left and right are determined based on the occupant seated on the vehicle seat. Further, in the left-right direction, the center side of the seat is referred to as the inside, and the opposite side is referred to as the outside.
In addition, the "outside of the vehicle" in the seat width direction means the one closer to the outside of the vehicle body (for easy understanding, the side closer to the nearest door), and the "inside of the vehicle" means the one closer to the inside of the vehicle body (understood). Easy means the side away from the nearest door).
Further, in the following description, "rotation" means a rotation operation about an axis along the seat width direction, unless otherwise specified.
A common number will be assigned to the same configuration provided in pairs on the left and right, and the description thereof will be omitted. Further, the shape and posture of the rear seats change between the seated state and the hip-up state as described later, but unless otherwise specified, the shape of each configuration will be described with reference to the seated state.

The vehicle seat S of the present embodiment is a seat that is placed on the vehicle body floor FL and on which the occupants of the vehicle are seated. The vehicle seat S is used as a rear seat corresponding to the rear seat of the vehicle. However, the present invention is not limited to this, and the vehicle seat S can also be used as a second row middle seat or a third row rear seat in a vehicle having three rows of seats in the front-rear direction.

As shown in FIG. 1, the vehicle seat S has a right seat S1 forming a right side seat and a center seat, and a left seat S2 forming a left side seat. A part of the right seat S1 and the left seat S2 for the vehicle in FIG. 1 is shown in a configuration in which the trim cover T is removed for convenience of illustration.

The right sheet S1 and the left sheet S2 have sheet main bodies Sh1 and Sh2 forming a main body portion thereof. The seat body Sh1 includes a seat cushion 1RA and 1RB rotatably provided with respect to the vehicle body floor FL, a seat back 2RA and 2RB rotatably supported by the seat cushion 1RA and 1RB, and a seat back 2RA. The main components are the headrests 3RA and 3RB, which are arranged on the upper part of the 2RB and support the seated person's head.

The seat body Sh2 also has a seat cushion 1L rotatably provided with respect to the vehicle body floor FL, a seat back 2L rotatably supported by the seat cushion 1L, and a seater arranged above the seat back 2L. The main component is the headrest 3L that supports the head of the headrest.
The seat cushions 1RA and 1RB and the seat backs 2RA and 2RB are connected with the reclining mechanism 8 (see FIG. 2) interposed therebetween. Further, the seat cushions 1RA and 1RB are attached in a rotatable state with respect to the vehicle body floor FL via a link mechanism 9 described later.
Similarly, the seat cushion 1L and the seat back 2L of the left seat S2 are also connected with the reclining mechanism 8 interposed therebetween, and the seat cushion 1L is rotatably attached to the vehicle body floor FL via the link mechanism 9. ..
A pair of slide rails 4R and 4L are installed at the lower portions of the seat bodies Sh1 and Sh2, and the slide rails 4R and 4L allow the seat bodies Sh1 and Sh2 to slide and move in the front-rear direction. It is attached to the floor FL.

As shown in FIG. 2, a seat frame F1 is provided in the right seat S1 of the vehicle seat S, and the seat frame F1 is composed of a seat cushion frame 11R as a skeleton, a seat back frame 12RA, and 12RB. Has been done. A seat frame F2 is provided in the left seat S2, and the seat frame F2 is composed of a seat cushion frame 11L and a seat back frame 12L as a skeleton.
Further, as shown in FIG. 1, a pad member P and a trim cover T are provided on the outside of the seat cushion frames 11R, 11L and the seat back frames 12RA, 12RB, 12L, so that the seat cushions 1RA, 1RB, 1L and the seat are provided. The back 2RA, 2RB, and 2L are configured. The pad member P is a urethane base material molded by foam molding using, for example, a urethane foam material, and the trim cover T is made of a material such as cloth or leather.

The right seat S1 of the vehicle seat S will be described. The seat cushion frame 11R of the right seat S1 is between a pair of left and right cushion side frames 14R extending back and forth, a front member 15R hung between the front ends of both cushion side frames 14R, and the rear ends of both cushion side frames 14R. The rear member 16R is hung on the rear member 16R, and the plate-shaped cushion pan frames 18RA and 18RB are hung on the left and right intermediate portions of the front member 15R and the rear member 16R. The cushion pan frames 18RA and 18RB function as cushion support members, the cushion pan frame 18RA supports the seat cushion 1RA on the right seat of the right seat S1, and the cushion pan frame 18RB supports the seat cushion 1RB on the center seat of the right seat S1. Support.

The rear end portion of the cushion side frame 14R projects upward to form the seat back support portion 17R. The cushion side frame 14R and the cushion pan frames 18RA and 18RB are formed of sheet metal members, and the front member 15R and the rear member 16R are formed of a metal pipe.

The seat back frames 12RA and 12RB of the right seat S1 are a pair of left and right backside frames 21RA and 21RB extending vertically, and upper members 22RA and 22RB spanned between the upper ends of both backside frames 21RA and 21RB, respectively. It includes lower members 23RA and 23RB that are hung between the lower parts of both backside frames 21RA and 21RB.
It also has backside frames 21RA, 21RB and plate-shaped backpan frames 24RA, 24RB provided to cover the rear portion of the frame formed by the upper members 22RA, 22RB and the lower members 23RA, 23RB.

Each of the lower end portions of the left and right back side frames 21RA and 21RB is rotatably supported by the seat back support portion 17R via the reclining mechanism 8. The reclining mechanism 8 is a known reclining mechanism, in which the rotation positions of the back side frames 21RA and 21RB with respect to the cushion side frame 14R are fixed at arbitrary positions, and when a predetermined tensile load is applied, the cushion side frame It enables the backside frames 21RA and 21RB to rotate with respect to 14R. The operation input unit of the reclining mechanism 8 is connected to the reclining operation lever (not shown) via a cable (not shown). The occupant can make the reclining mechanism 8 rotatable by operating the reclining operating lever.

The seat cushion frame 11R that supports the seat cushions 1RA and 1RB is supported so as to be slidable via a pair of left and right slide rails 4R connected to the vehicle body floor FL.
The slide rail 4R has a lower rail 5R extending in the front-rear direction and an upper rail 6R supported by the lower rail 5R so as to be displaceable in the front-rear direction. The lower rail 5R has a bottom wall portion whose main surface faces up and down and extends back and forth, left and right side wall portions projecting upward at a substantially right angle from the left and right side edges of the bottom wall portion, and abbreviated from the upper edge of each bottom wall portion. It has an upper wall portion that protrudes inward at a right angle. The upper rail 6R has a base housed in the lower rail 5R and a protruding portion protruding upward from the base through a gap between both upper wall portions of the lower rail 5R.

At the rear ends of the pair of cushion side frames 14R supporting the seat cushions 1RA and 1RB, as shown in FIGS. 2 to 4, a pair of locking the rear ends of the seat cushions 1RA and 1RB to the upper rail 6R. Lock device 30 is provided. The lock device 30 locks the rear ends of the seat cushions 1RA and 1RB to the upper rail 6R when no operating force is applied from the outside by the cable 36. When an external operating force is applied, as shown in FIG. 3, the lock device 30 is unlocked and the seat body Sh1 is moved forward so that the rear ends of the seat cushions 1RA and 1RB are moved from the upper rail 6R. It becomes separable. The lock device 30 may lock the rear ends of the seat cushions 1RA and 1RB with respect to the vehicle body floor FL.

A known configuration can be applied to the locking device 30, and the locking device 30 is configured to be engageable with a striker 29 attached to the upper surface of the upper rail 6R, for example, as shown in FIG. The lock device 30 is a latch having a resin housing 31 and a metal hook-shaped portion 32c that is housed in the resin housing 31 and is rotatably supported by the resin housing 31 and engages with the striker 29. 32 and. In the latch 32, the first hole portion 32a penetrating in the thickness direction is fitted to the outside of the first shaft 31a of the resin housing 31, and is rotatably supported by the resin housing 31. The latch 32 has a groove portion 32b that engages with the rod-shaped portion of the striker 29, and a portion that forms the outside of the groove portion 32b is a hook-shaped portion 32c.

Further, the latch 32 has a lock recess 32d formed at the upper right edge of the latch 32 in the state shown in FIG. The outer peripheral portion adjacent to the left side of the lock recess 32d is an open contact surface 32e that the ratchet 33 contacts when the latch 32 is opened to maintain the open state of the latch 32. The force received by the latch 32 from the lock locking portion 33c of the ratchet 33 acts to rotate the latch 32 in the clockwise direction, that is, toward the open state. Further, a pin 32f that pivotally supports the lever member 34 is press-fitted into the latch 32.

The ratchet 33 is a metal substantially plate-shaped member, and a second hole portion 33a penetrating in the thickness direction is fitted to the outside of the second shaft 31b of the resin housing 31 and rotates around the resin housing 31. It is supported as much as possible. The rotation axis of the ratchet 33 is parallel to the rotation axis of the latch 32. The ratchet 33 has a substantially fan-shaped main body 33b on the upper left side of the second hole 33a, and the lower left corner of the main body 33b is a lock locking portion 33c that abuts on the latch 32. The lock locking portion 33c enters the lock recess 32d of the latch 32 in the closed state of the latch 32 to maintain the closed state of the latch 32, and in the open state of the latch 32, abuts on the open contact surface 32e and opens. It works to maintain the state.

An arm 33d extending further upward is formed from the upper portion of the main body 33b of the ratchet 33, and a hook 33e on which the right end of the tension spring 35 as an example of the urging member is hooked is formed at the tip of the arm 33d. There is. Further, a hole 33f is formed in the arm 33d, and a cable 36 for operating the locking device 30 from the locked state to the unlocked state is swingably connected to the hole 33f by the rivet 33g.

The lever member 34 is an operation mechanism for interlocking the operation of the ratchet 33 with the latch 32. The lever member 34 is an elongated plate-shaped member, and is rotatably supported by the latch 32 by fitting a hole formed at substantially the center in the longitudinal direction into the pin 32f of the latch 32.

As described above, each end of the tension spring 35 is hooked on the ratchet 33 and the lever member 34, and an urging force is applied so as to constantly attract the main body portion 33b of the ratchet 33 and the operation arm 34a of the lever member 34. This urging force also acts to urge the lock locking portion 33c of the ratchet 33 toward the latch 32.

The vehicle seat S of the present embodiment is provided with an unlocking drive unit 40 (unlocking drive unit) connected to the locking device 30 by a cable 36 in order to unlock the locking device 30. .. The unlocking drive unit 40 is configured to pull the cable 36 to unlock the locking device 30.

As shown in FIG. 6, the unlocking drive unit 40 includes a housing 41, a motor 42, and a drive wheel 43 that engages with the motor 42 so as to receive a driving force. The drive wheel 43 has a coaxial drive sprocket 44 having a smaller radius than the drive wheel 43. The housing 41 houses the drive wheel 43, the drive sprocket 44, and the actuating wheel 45. The cable 36 connected to the lock device 30 enters the housing 41 via the anchor 46. The end 36a of the cable 36 is fixed to the actuating wheel 45. The actuating wheel 45 has teeth 45a that engage the teeth of the drive sprocket 44. When the motor 42 is driven, the operating wheel 45 rotates via the drive wheel 43 and the drive sprocket 44 to wind the cable 36. As a result, the cable 36 is towed and the lock device 30 is unlocked. The unlocking drive unit 40 is connected to an ECU 70 (Electroro Control Unit), which is an electronic control unit described later, and a motor 42 is driven by a command from the ECU 70 to unlock the lock device 30. In the present embodiment, the unlocking drive unit 40 is connected to the locking device 30 by a cable 36, which is an example, and the cable 36 may be a metal rod or a link.

The vehicle seat S of the present embodiment is provided with a hip-up drive unit 50 (hip-up drive unit). The hip-up drive unit 50 is used to switch the seat bodies Sh1 and Sh2 between the seated state and the hip-up state. The hip-up drive unit 50 has the same configuration as the unlock drive unit 40, but instead of pulling the cable 36, the front side of the cushion side frame 14R as shown in FIGS. 2, 4 and 8. It is configured to engage with the sector gear 9d of the link mechanism 9 described later. The hip-up drive unit 50 is connected to the ECU 70, which will be described later, and is driven by a command from the ECU 70 to rotate the seat cushions 1RA and 1RB so as to switch between the seated state and the hip-up state of the seat body Sh1.

As shown in FIG. 7, the link mechanism 9 is a four-section link mechanism provided on the front side of the cushion side frame 14R. The link mechanism 9 includes a base portion 9a fixed to the upper rail 6R of the slide rail 4R, a front link 9b having one end rotatably provided on the front side of the base portion 9a, and one end. It is rotatably provided on the rear side of the base portion 9a and includes a rear link 9c having a sector gear 9d. The other end of the front link 9b and the other end of the rear link 9c are rotatably attached to the cushion side frame 14R. As described above, the hip-up drive unit 50 and the sector gear 9d of the rear link 9c engage with each other. After unlocking the lock device 30 by the ECU 70 described later, by driving the hip-up drive unit 50, the cushion side frame 14R rotates in the direction of arrow D, and the rear ends of the seat cushions 1RA and 1RB are moved. Ascend (see Figure 3). The rear end of the seat cushions 1RA and 1RB is located above the front end, and the seat body Sh1 switches from the seated state to the hip-up state.

The seat cushions 1RA and 1RB of the seat body Sh1 are configured to be slidable along the slide rail 4R along the front-rear direction of the vehicle seat S. The vehicle seat S includes a slide drive unit 60 (slide drive unit) that slides and moves the seat body Sh1 in the front-rear direction. Although not shown, the slide drive unit 60 includes a housing, a motor, and a drive wheel / actuating wheel provided inside the housing, similarly to the unlock drive unit 40. The slide drive unit 60 is connected to the ECU 70 and is controlled by the ECU 70. The upper rail 6R of the slide rail 4R is slid and moved by a command from the ECU 70. The seat cushions 1RA and 1RB move together with the upper rail 6R, and the seat body Sh1 moves.

The vehicle seat S of the present embodiment is provided with an ECU 70 as an electronic control unit. The ECU 70 includes a CPU 71, a memory 72, and an input / output IF73 (input / output interface). The ECU 70 is a control unit (computer) that is connected to the unlocking drive unit 40, the hip-up drive unit 50, and the slide drive unit 60, and controls them. The ECU 70 used in the vehicle seat S is provided below the seat cushions 1RA and 1RB, but the position of the ECU 70 is not limited to this, and is provided as an external device for the seat back 2RA, 2RB or the vehicle seat S. You may.

The CPU 71 is a central processing unit that executes various arithmetic processes based on programs and data stored in the memory 72. When the CPU 71 receives an instruction from an occupant to bring it into a hip-up state via an input / output IF73, the CPU 71 is a central processing unit. The unlocking drive unit 40 and the hip-up drive unit 50 are controlled according to the current state. The memory 72 stores various programs and data, and also functions as a work memory of the CPU 71. The input / output IF73 is connected to the unlocking drive unit 40, the hip-up drive unit 50, and the slide drive unit 60, and communicates with each unit.

The right seat S1 of the vehicle seat S of the present embodiment includes a fixing bracket 80R between the pair of slide rails 4R as shown in FIG. 9 below the seat cushions 1RA and 1RB. Two unlocking drive units 40, an ECU 70, and a slide drive unit 60 are arranged on the fixing bracket 80R. The fixing bracket 80R is provided so as to extend in the width direction of the vehicle seat S so as to hang between the pair of slide rails 4R. The fixing bracket 80R is arranged in front of the center C in the front-rear direction of the slide rail 4R. Therefore, the two unlocking drive units 40 are arranged in front of the center C of the slide rail 4R, which is a vehicle body side support member.
Conventionally, since the unlocking drive unit 40 for unlocking the locking device 30 is arranged near the locking device 30, that is, behind the seat, the space on the rear seat side of the seat is narrowed. Since the unlocking drive unit 40 is located in front of the center C of the slide rail 4R as in the vehicle seat S of the present embodiment, the space on the rear seat side of the seat is secured.
When the vehicle seat does not have the slide rail 4R, the unlocking drive unit 40 may be located in front of the center of the seat cushions 1RA and 1RB in the front-rear direction.

As shown in FIG. 8, the hip-up drive unit 50 is arranged on the cushion side frame 14R on the front side of the center of the slide rail 4R. Compared with the case where the drive units are arranged separately in the front and the rear, the arrangement area of the lock release drive unit 40 and the hip-up drive unit 50 can be kept in a narrow range, and a compact arrangement can be provided.
In the present embodiment, the unlocking drive unit 40 and the ECU 70 are fixed to the vehicle body floor FL of the vehicle seat S by the fixing bracket 80R, but this is an example, and the unlocking drive unit 40 and the unlocking drive unit 40 and The ECU 70 may be attached to the vehicle body floor FL using separate fixing members. By using the fixing bracket 80R, only one component is required for fixing the unlocking drive unit 40, the ECU 70, and the slide drive unit 60, so that an increase in the number of components can be suppressed.

As shown in FIG. 2, the cushion pan frames 18RA and 18RB of the right seat S1 are composed of a plate-shaped pan frame, and the front portions 18RAa and 18RBa of the cushion pan frames 18RA and 18RB are raised forward in a side view. It is formed to be inclined. In other words, the front portions 18RAa and 18RBa are formed in a forward rising shape, which is an inclined surface that is inclined so as to move upward from the vehicle body floor FL toward the front. Therefore, as shown in FIGS. 4 and 8, a space is formed below the front portions 18RAa and 18RBa. In the present embodiment, the unlocking drive unit 40, the slide drive unit 60, and the ECU 70 are arranged in the space. By arranging in this way, it becomes possible to effectively utilize the space below the seat body and install the unlocking drive unit 40 and the like.

The fixing bracket 80R has a larger width W1 in the front-rear direction of the portion corresponding to the slide drive unit 60 than a width W2 in the front-rear direction of the portion corresponding to the slide drive unit 60. With such a configuration, it is possible to suppress an increase in the size of the fixing bracket 80R. Further, in the fixing bracket 80R, as shown in FIG. 9, the unlocking drive unit 40, the ECU 70, and the slide drive unit 60 are arranged side by side in the width direction of the seat body Sh1. By arranging them side by side in the width direction, they can be arranged compactly in the front-rear direction.

The left sheet S2 has a structure substantially similar to that of the right sheet S1. Hereinafter, the configuration of the left sheet S2 different from that of the right sheet S1 will be mainly described.
As shown in FIG. 2, the seat cushion frame 11L of the left seat S2 includes a pair of left and right cushion side frames 14L extending in the front-rear direction, a front member 15L hung between the front ends of both cushion side frames 14L, and both cushion sides. It has a rear member 16L hung between the rear ends of the frame 14, and a plate-shaped cushion pan frame 18L hung between the left and right intermediate portions of the front member 15L and the rear member 16L. The cushion pan frame 18L supports the seat cushion 1L of the left seat S2 and functions as the cushion support member of the present invention.

The rear end portion of the cushion side frame 14L projects upward to form the seat back support portion 17L. The cushion side frame 14L and the cushion pan frame 18L are formed of sheet metal members, and the front member 15L and the rear member 16L are formed of metal pipes like the front member 15R and the rear member 16R of the right seat S1.

Each of the lower end portions of the left and right back side frames 21L is rotatably supported by the seat back support portion 17L via the reclining mechanism 8.
The seat back frame 12L of the left seat S2 is between a pair of left and right backside frames 21L extending vertically, an upper member 22L hung between the upper ends of both backside frames 21L, and the lower part of both backside frames 21L. It has a lower member 23L that has been hung.
Further, it has a back side frame 21L and a plate-shaped back pan frame 24L provided so as to cover the rear portion of a frame formed by the upper member 22L and the lower member 23L.

The seat cushion frame 11L that supports the seat cushion 1L is supported so as to be slidable via a pair of left and right slide rails 4L coupled to the vehicle body floor FL.
The slide rail 4L has a lower rail 5L extending in the front-rear direction and an upper rail 6L supported by the lower rail 5L so as to be displaceable in the front-rear direction. Since the structure of the slide rail 4L is the same as that of the slide rail 4R supporting the right seat S1, the description thereof will be omitted.

At the rear end of the cushion side frame 14L of the seat cushion 1L, as shown in FIGS. 2 and 3, the rear end of the seat cushion 1L is attached to the vehicle body floor FL as in the case of the seat cushions 1RA and 1RB of the right seat S1. A pair of locking devices 30 for locking are provided. The lock device 30 can be unlocked by pulling the cable 36, and the rear end of the seat cushion 1L is separated from the vehicle body floor FL by unlocking the lock device 30 and moving the seat body Sh2 forward. It will be possible.

Similar to the cushion side frame 14R of the right seat S1, a four-section link mechanism 9 is provided on the front side of the cushion side frame 14L. A hip-up drive unit 50 is attached to the link mechanism 9, and when the hip-up drive unit 50 is driven, the cushion side frame 14L rotates to bring the seat body Sh2 into a hip-up state.

In the left seat S2 of the vehicle seat S of the present embodiment, as shown in FIG. 9, two unlocking drive units 40 are arranged between the pair of slide rails 4L below the seat cushion 1L. A fixing bracket 80L is provided. The fixing bracket 80L is provided so as to extend in the width direction of the vehicle seat S so as to hang between the pair of slide rails 4L. As shown in FIG. 9, the fixing bracket 80L is arranged on the front side of the center C in the front-rear direction of the slide rail 4L. Therefore, the two unlocking drive units 40 are arranged in front of the center C of the slide rail 4L, which is a vehicle body side support member.

Since the unlocking drive unit 40 is located in front of the center C of the slide rail 4L, a space on the rear seat side of the seat is secured. In the case of a seat that does not have the slide rail 4L, the unlocking drive unit 40 may be located in front of the center of the seat cushion 1L in the front-rear direction.
Further, as shown in FIG. 2, the hip-up drive unit 50 is also arranged on the cushion side frame 14L on the front side of the center C of the slide rail 4L.

The cushion pan frame 18L of the left seat S2 is configured by a plate-shaped pan frame as shown in FIG. 2, similarly to the cushion pan frames 18RA and 18RB of the right seat S1. Further, the front portion 18La of the cushion pan frame 18L is formed so as to be inclined forward in a side view. As shown in FIG. 2, a space is formed below the front portion 18La, and two unlocking drive units 40 are arranged in the space. By arranging in this way, it becomes possible to install the lock release drive unit 40 by effectively utilizing the space below the seat body Sh2.

In the present embodiment, the two unlocking drive units 40 are fixed by the fixing bracket 80L, but this is an example. The unlocking drive unit 40 is fixed to the vehicle body floor FL by using separate fixing members. It may be attached to. By using the fixing bracket 80L, only one member is required to fix the unlocking drive unit 40, so that an increase in the number of parts can be suppressed.

In the vehicle seat S shown in FIGS. 2 and 8, the unlocking drive unit 40 is a front portion 18RAa, 18RBa of the cushion pan frame 18RA, 18RA, 18L (hereinafter collectively referred to as a cushion pan frame 18) that is raised forward. , 18La (hereinafter collectively referred to as the front portion 18a), the fixing brackets 80R and 80L were used to fix the space. This is an example, and as shown in FIGS. 10, 11A, and 11B, the unlocking drive unit 40 may be attached to the lower surface of the front portion 18a of the cushion pan frame 18. By attaching the unlocking drive unit 40 to the lower surface of the front portion 18a, the unlocking drive unit 40 can be used as a seat cushion 1RA, 1RA, 1L (when the seat bodies Sh1 and Sh2 are switched between the seated state and the hip-up state. Hereinafter, it moves together with the seat cushion 1). Since the positional relationship between the lock device 30 provided behind the seat cushion 1 and the unlock drive unit 40 does not change, the cable 36 connecting the lock device 30 and the unlock drive unit 40 is not moved either. , The cable 36 is suppressed from coming into contact with other members, and damage can be suppressed.

When the unlocking drive unit 40 is attached to the cushion pan frame 18, a bead 81 that extends in the front-rear direction of the seat bodies Sh1 and Sh2 and projects downward may be formed on the cushion pan frame 18. By forming the bead 81, the cushion pan frame 18 is reinforced, and the weight of the unlocking drive unit 40 suppresses the deformation of the cushion pan frame 18.

Further, as shown in FIG. 11A, the beads 81 may be arranged in the vicinity of both side portions of the cushion pan frame 18. When the unlocking drive unit 40 is attached to the cushion pan frame 18 in which the beads 81 are arranged on both side portions, the unlocking drive unit 40 may be arranged so as to be vertically overlapped with the bead 81. By arranging in this way, the support rigidity for supporting the unlocking drive unit 40 can be improved.

Further, as shown in FIG. 11B, the unlocking drive unit 40 may be arranged so as to avoid the bead 81 formed on the cushion pan frame 18. By arranging the unlocking drive unit 40 while avoiding the bead 81, it can be directly attached to the plate-shaped portion of the cushion pan frame 18 between the beads 81, and the attachmentability of the unlocking drive unit 40 is improved. ..

S Vehicle seat S1 Right seat S2 Left seat T Trim cover P Pad member FL Body floor Sh1, Sh2 Seat body 1, 1RA, 1RB, 1L Seat cushion 2RA, 2RB, 2L Seat back 3RA, 3RB, 3L Headrest 4R, 4L slide Rail (vehicle body side support member)
5R, 5L Lower rail 6R, 6L Upper rail 8 Reclining mechanism 9 Link mechanism 9a Base part 9b Front side link 9c Rear side link 9d Sector gear F1, F2 Seat frame 11R, 11L Seat cushion frame 12RA, 12RB, 12L Seat back frame 14R, 14L Cushion side frame 15R, 15L Front member 16R, 16L Rear member 17R, 17L Seat back support 18, 18RA, 18RB, 18L Cushion pan frame (cushion support member)
18a, 18RAa, 18RBa, 18La Front part 21RA, 21RB, 21L Back side frame 22RA, 22RB, 22L Upper member 23RA, 23RB, 23L Lower member 24RA, 24RB, 24L Back pan frame 29 Striker 30 Locking device 31 Resin housing 31a No. 1-axis 31b 2nd-axis 32 Latch 32a 1st hole 32b Groove 32c Hook-shaped 32d Lock recess 32e Open contact surface 32f Pin 33 Ratchet 33a 2nd hole 33b Main body 33c Lock lock 33d Arm 33e Hook 33f Hole 33g Rivet 34 Lever member 34a Operation arm 35 Tension spring 36 Cable 36a End 40 Unlocking drive unit (Unlocking drive unit)
41 Housing 42 Motor 43 Drive wheel 44 Drive sprocket 45 Operating wheel 45a Teeth 50 Hip-up drive unit (hip-up drive unit)
60 Slide drive unit (slide drive unit)
70 ECU (electronic control unit)
71 CPU
72 Memory 73 I / O IF
80R, 80L fixing bracket 81 bead

Claims (9)

A seat body having a seat cushion and capable of switching between a seated state in which an occupant can be seated and a hip-up state in which the rear end of the seat cushion is located above the front end.
A vehicle body side support member that supports the seat body from the vehicle body floor side,
A locking device that locks the rear end of the seat cushion to the vehicle body side support member or the vehicle body floor.
An unlocking drive unit that connects to the locking device and unlocks the locking device,
A hip-up drive unit that rotates the seat cushion to bring the seat body into the hip-up state is provided.
The locking device is arranged behind the center of the seat cushion in the front-rear direction.
The vehicle seat, wherein the unlocking drive unit and the hip-up drive unit are arranged in front of the center of the seat cushion or the vehicle body side support member in the front-rear direction. A cushion support member for supporting the seat cushion from below is provided.
The front portion of the cushion support member is formed so as to incline forward in a side view.
The vehicle seat according to claim 1, wherein the unlocking drive unit is arranged in a space below the front portion of the cushion support member that is raised forward. A fixing bracket is provided below the seat cushion.
The vehicle seat according to claim 1 or 2, wherein the unlocking drive unit and the electronic control unit are arranged on the fixing bracket. The vehicle body side support member is a slide rail that slides and moves the seat cushion along the front-rear direction of the vehicle seat.
The seat cushion is provided so as to be slidable by the slide rail.
The vehicle seat includes a slide drive unit for sliding the slide rail.
The vehicle seat according to claim 3, wherein the slide drive unit is arranged on the fixing bracket. The fourth aspect of the present invention is characterized in that the portion corresponding to the unlocking drive portion is formed to have a wider width in the front-rear direction than the portion corresponding to the slide drive portion. Described vehicle seat. The fourth or fifth aspect of the present invention, wherein the unlocking drive unit, the slide drive unit, and the electronic control unit are arranged side by side in the width direction of the seat body on the fixing bracket. Vehicle seat. The vehicle seat according to claim 2, wherein the unlocking drive unit is attached to the cushion support member. The cushion support member is composed of a plate-shaped pan frame.
The pan frame is formed with beads that extend in the front-rear direction and project downward.
The vehicle seat according to claim 7, wherein the unlocking drive unit is arranged so as to overlap the bead in the vertical direction. The cushion support member is composed of a plate-shaped pan frame.
The pan frame is formed with beads that extend in the front-rear direction and project downward.
The vehicle seat according to claim 7, wherein the unlocking drive unit is arranged so as to avoid the bead.

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