JP7389329B2 - vehicle seat - Google Patents

Description

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

2. Description of the Related Art Conventionally, some vehicles are equipped with a rear seat that can be switched from a seated state in which an occupant is seated to a hip-up state in which the rear end of the seat cushion is positioned above the front end. By lifting the rear end of the seat cushion to raise the hips, passengers can enter and exit the rear seat. However, since the seat is quite heavy, it takes effort to tilt the seat until it is in a hip-up position.

Patent Document 1 discloses a first motor and a control device for the first motor, in which a front end of a seat cushion is rotatably attached to a vehicle body, and the seat can be moved from a seated state to a hip-up state. A vehicle seat is disclosed. The vehicle seat of Patent Document 1 also includes a locking device that locks the seat cushion, a second motor that can unlock the locking device, and a control device for the second motor. By operating the control device, the occupant can unlock the locking device using the second motor and drive the first motor, thereby switching the seat from the seated state to the hip-up state with minimal effort.

US Patent Application Publication No. 2019/0092191

In the vehicle seat described in Patent Document 1, a second motor (unlock drive unit) for releasing the lock is arranged behind the seat cushion. As a result, the space on the rear seat side was narrow.

The present invention has been made in view of the above-mentioned problems, and its purpose is to secure a space on the rear side of the seat, and to provide a hip-up drive unit and a lock-release drive unit that bring the seat body into a hip-up state. and to provide a compact arrangement.

The above problem is solved by the vehicle seat according to the present invention, which has a seat cushion, and has two states: a seated state in which an occupant can sit, and a hip-up state in which the rear end of the seat cushion is located above the front end. a switchable seat body; a vehicle body support member that supports the seat body from a vehicle floor side; a lock device that locks a rear end portion of the seat cushion to the vehicle body support member or the vehicle floor; and the lock device. and a hip-up drive section that rotates the seat cushion to bring the seat body into the hip-up state, the lock device being connected to the lock device. is arranged behind the center of the seat cushion in the longitudinal direction, and the lock release drive part and the hip-up drive part are arranged in front of the center of the seat cushion or the vehicle body side support member in the longitudinal direction. This problem is solved by providing a fixing bracket below the seat cushion, and disposing the lock release drive section and the electronic control section on the fixing bracket.
Moreover, according to the vehicle seat according to the present invention, the vehicle seat includes a seat cushion, and a sitting state in which an occupant can sit and a hip-up state in which the rear end of the seat cushion is located above the front end. a seat body that can be switched between the seat body and the body floor; 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 portion of the seat cushion to the vehicle body side support member or the vehicle body floor; an unlock drive unit that connects to a lock device 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, The locking device is disposed behind the center of the seat cushion in the longitudinal direction, and the lock release drive section and the hip-up drive section are arranged in front of the center of the seat cushion or the vehicle body support member in the longitudinal direction. a cushion support member disposed in the seat cushion supporting the seat cushion from below; the lock release drive unit is attached to the cushion support member; the cushion support member is configured by a plate-shaped pan frame; A bead extending in the front-rear direction and projecting downward is formed on the pan frame, and the unlocking drive section is arranged to overlap the bead in the up-down direction.
The seat body includes a seat cushion and is capable of switching between a seated state in which an occupant is seated and a hip-up state in which a rear end of the seat cushion is located above a front end; A vehicle body side support member that supports from the 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 a lock that is connected to the lock device and that unlocks the lock device. a release drive unit; and a hip-up drive unit that rotates the seat cushion to bring the seat body into the hip-up state; The lock release drive part and the hip-up drive part are arranged in front of the center of the seat cushion or the vehicle body side support member in the front-rear direction, and the cushion support member supports the seat cushion from below. The lock release drive unit is attached to the cushion support member, the cushion support member is constituted by a plate-shaped pan frame, and the pan frame has a bead extending in the front-rear direction and protruding downward. This is solved by arranging the unlocking drive part so as to avoid the bead.

According to the vehicle seat described above, the lock release drive section and the hip-up drive section are arranged forward of the center of the seat cushion or the vehicle body support member in the longitudinal direction. This ensures more space on the rear seat side.
In addition, since the lock release drive part and the hip lift drive part are both placed in the front, the lock release drive part and the hip lift drive part are both placed in the front, compared to a case where they are placed separately in the front and back. The arrangement area can be kept within a narrow range and a compact arrangement can be provided.
In addition, since the lock release drive unit and the electronic control unit are arranged in the fixing bracket, only one member is required to fix the lock release drive unit and the electronic control unit, which reduces the number of parts. It can be suppressed.
In addition, since the lock release drive unit is attached to the cushion support member, the lock release drive unit moves together with the seat cushion. Damage can be suppressed.
Furthermore, by arranging the lock release drive unit so as to overlap the bead in the vertical direction, the support rigidity of the lock release drive unit can be improved.
In addition, by arranging the lock release drive unit so as to avoid the bead, the lock release drive unit can be directly attached to the plate-shaped portion of the cushion support member, improving the ease of attaching the lock release drive unit. .

The vehicle seat described above further includes a cushion support member that supports the seat cushion from below, and a front portion of the cushion support member is formed to be inclined upwardly in a side view, and the lock release The driving portion may be disposed in a space below the raised front portion of the cushion support member.
By placing the lock release drive unit in the space below the raised front part of the cushion support member, the space below the seat body can be effectively used to provide the lock release 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 section and the electronic control section are arranged on the fixing bracket.
With such a configuration, only one member is required for fixing the lock release drive section and the electronic control section, so an increase in the number of parts can be suppressed.

Further, in the vehicle seat described above, 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 is slidably movable by the slide rail. The vehicle seat may include a slide drive unit that slides the slide rail, and the slide drive unit may be disposed on the fixing bracket.
By fixing the slide drive section with the fixing bracket, there is no need to separately provide a component for fixing the slide drive section, and an increase in the number of components can be suppressed.

Further, in the above-mentioned 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. Good.
With such a configuration, it is possible to suppress the fixing bracket from increasing in size.

Further, in the vehicle seat described above, the lock release drive section, the slide drive section, and the electronic control section may be arranged on the fixing bracket in a line in the width direction of the seat body.
With this configuration, the lock release drive section, the slide drive section, and the electronic control section can be arranged compactly in the front-rear direction of the seat body.

Moreover, in the above-described vehicle seat, the lock release drive section may be attached to the cushion support member.
By attaching the lock release drive unit to the cushion support member, the lock release drive unit moves together with the seat cushion, thereby preventing damage to the traction member, such as a cable or rod, that connects the lock device and the lock release drive unit. Can be suppressed.

According to the vehicle seat described above, the lock release drive section and the hip-up drive section are arranged forward of the center of the seat cushion or the vehicle body support member in the longitudinal direction. This ensures more space on the rear seat side.
In addition, since the lock release drive part and the hip lift drive part are both arranged in the front, the arrangement of the lock release drive part and the hip lift drive part is different from the case where they are arranged separately in the front and rear. The area can be kept within a small range and a compact arrangement can be provided.
Furthermore, by disposing the lock release drive unit in the space below the raised front portion of the cushion support member, the space below the seat body can be effectively utilized to provide the lock release drive unit. It becomes possible.
In addition, by placing the lock release drive unit and electronic control unit in the fixing bracket, only one part is required to fix the lock release drive unit and electronic control unit, which reduces the number of parts. It can be suppressed.
Further, by fixing the slide drive section with the fixing bracket, there is no need to separately provide a component for fixing the slide drive section, so an increase in the number of parts can be suppressed.
Further, since the portion corresponding to the unlocking drive portion is formed wider in the front-rear direction than the portion corresponding to the slide drive portion, it is possible to suppress the fixing bracket from increasing in size.
Furthermore, by arranging the lock release drive section, the slide drive section, and the electronic control section in line with the fixing bracket in the width direction, each member can be arranged compactly in the front-rear direction.
In addition, since the lock release drive unit is attached to the cushion support member, the lock release drive unit moves together with the seat cushion. Damage can be suppressed.
Further, by arranging the lock release drive unit so as to overlap the bead formed on the cushion support member, the support rigidity of the lock release drive unit can be improved.
Moreover, the lock release drive unit is arranged so as to avoid the bead formed on the cushion support member, so that the ease of attaching the lock release drive unit is improved.

1 is a perspective view of a vehicle seat according to an embodiment of the present invention. FIG. 2 is a perspective view showing a frame of a vehicle seat. FIG. 3 is a side view of the frame of the vehicle seat, showing the seat body of the right seat in a hip-up position. FIG. 3 is an enlarged perspective view of the front of the right seat. It is a figure showing the composition of a locking device. It is a figure showing the composition of a drive unit for locking and unlocking. It is a figure which shows the four-bar linkage mechanism connected with the drive unit for hip lifts. 3 is a sectional view taken along line VIII-VIII in FIG. 2. FIG. It is a top view which shows a slide rail and a bracket for fixation. It is a sectional view showing arrangement of a drive unit for lock release. It is a top view which shows arrangement|positioning of the drive unit for lock release. It is a top view which shows another arrangement|positioning of the drive unit for lock release.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a vehicle seat according to the present invention is applied to rear seats (including second and third row seats) of an automobile will be described below with reference to the drawings. However, the embodiments described below are for facilitating understanding of the present invention, and are not intended to limit the present invention. That is, the present invention may be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof. Further, in the following description, the content regarding the material, shape, and size of the seat component parts is merely one specific example, and does not limit the present invention. Furthermore, the present invention is not limited to vehicle seats mounted on land-based vehicles with wheels such as automobiles and trains, but can also be applied to seats mounted on aircraft, ships, etc. that move other than on the ground. may be applied.

In the following description, the "front-back direction" refers to the front-back direction of the vehicle seat (in other words, the front-back direction of the seat body), and is a direction that coincides with the direction in which the vehicle travels. Moreover, the "seat width direction" is the width direction of the vehicle seat (in other words, the width direction of the seat body), and is a direction that coincides with the left-right direction as seen from an occupant seated on the vehicle seat. Moreover, the "vertical direction" refers to the 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, left and right are determined based on the passenger seated in the vehicle seat. Furthermore, in the left-right direction, the center side of the sheet is referred to as the inner side, and the opposite side is referred to as the outer side.
In addition, "outside the car" in the seat width direction means the side closer to the outside of the car body (for ease of understanding, the side closest to the nearest door), and "inside the car" means the side closer to the inside of the car body (for ease of understanding, the side closest to the nearest door). Easy means the side farthest from the nearest door).
In addition, in the following description, "rotation" means a rotation movement about an axis along the sheet width direction, unless otherwise specified.
Identical configurations provided in pairs on the left and right sides are given common numbers, and description thereof will be omitted. Further, as will be described later, the form and posture of the rear seat change between the seated state and the hip-up state, but unless otherwise specified, the shape of each component will be described based on the seated state.

The vehicle seat S of this embodiment is placed on the vehicle body floor FL, and is a seat on which a vehicle occupant sits. The vehicle seat S is used as a rear seat corresponding to a rear seat of a vehicle. However, the present invention is not limited thereto, and the vehicle seat S can also be used as a second-row middle seat or a third-row rear seat in a vehicle equipped with three rows of seats in the longitudinal direction.

As shown in FIG. 1, the vehicle seat S includes a right seat S1 that constitutes a right side seat and a center seat, and a left seat S2 that constitutes a left side seat. In FIG. 1, a portion of the right seat S1 and the left seat S2 for a vehicle are shown with the trim cover T removed for convenience of illustration.

The right seat S1 and the left seat S2 have seat bodies Sh1 and Sh2 forming their main body parts. The seat body Sh1 includes seat cushions 1RA and 1RB that are rotatably provided with respect to the vehicle body floor FL of the automobile, seat backs 2RA and 2RB that are rotatably supported by the seat cushions 1RA and 1RB, and a seat back 2RA. , 2RB, and headrests 3RA and 3RB that support the head of the seated person.

The seat body Sh2 also includes a seat cushion 1L that is rotatably provided with respect to the vehicle floor FL, a seat back 2L that is rotatably supported by the seat cushion 1L, and a seat that is arranged above the seat back 2L to accommodate the seated person. The main component is a headrest 3L that supports the head of the person.
The seat cushions 1RA, 1RB and the seat backs 2RA, 2RB are connected with a reclining mechanism 8 (see FIG. 2) in between. Further, the seat cushions 1RA and 1RB are rotatably attached to the vehicle body floor FL via a link mechanism 9, which will be described later.
The seat cushion 1L and seat back 2L of the left seat S2 are similarly connected across the reclining mechanism 8, and the seat cushion 1L is rotatably attached to the vehicle floor FL via a link mechanism 9. .
A pair of slide rails 4R and 4L are installed at the bottom of each of the seat bodies Sh1 and Sh2, and these slide rails 4R and 4L allow the seat bodies Sh1 and Sh2 to slide in the front and back direction while moving toward the vehicle body. 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 frame, and seat back frames 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 as a skeleton and a seat back frame 12L.
In addition, pad members P and trim covers T are provided on the outside of the seat cushion frames 11R, 11L and the seat back frames 12RA, 12RB, 12L as shown in FIG. Back 2RA, 2RB, and 2L are configured. The pad member P is a urethane base material formed 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 explained. The seat cushion frame 11R of the right seat S1 includes a pair of left and right cushion side frames 14R extending front and rear, a front member 15R spanning between the front ends of both the cushion side frames 14R, and a rear end of the cushion side frames 14R. It has a rear member 16R that spans over the front member 15R and the rear member 16R, and plate-shaped cushion pan frames 18RA and 18RB that span between the left and right middle parts 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 of the right seat of the right seat S1, and the cushion pan frame 18RB supports the seat cushion 1RB of the center seat of the right seat S1. support.

A rear end portion of the cushion side frame 14R protrudes upward and forms a seat back support portion 17R. The cushion side frame 14R and the cushion pan frames 18RA and 18RB are formed from sheet metal members, and the front member 15R and rear member 16R are formed from metal pipes.

The seat back frames 12RA and 12RB of the right seat S1 each include a pair of left and right backside frames 21RA and 21RB that extend vertically, and upper members 22RA and 22RB that are stretched between the upper ends of both backside frames 21RA and 21RB, It includes lower members 23RA and 23RB that are stretched between the lower portions of both back side frames 21RA and 21RB.
It also includes back side frames 21RA, 21RB, plate-shaped back pan frames 24RA, 24RB provided so as to cover the rear part of the frame formed by upper members 22RA, 22RB and lower members 23RA, 23RB.

The lower end portions of the left and right back side frames 21RA and 21RB are each rotatably supported by the seat back support portion 17R via a reclining mechanism 8. The reclining mechanism 8 is a known reclining mechanism, which fixes the rotational position of the backside frames 21RA and 21RB with respect to the cushion side frame 14R at an arbitrary position, and when a predetermined tensile load is applied, the cushion side frame The backside frames 21RA and 21RB can be rotated relative to the backside frames 14R. The operation input section of the reclining mechanism 8 is connected to a reclining operation lever (not shown) via a cable (not shown). The occupant can rotate the reclining mechanism 8 by operating the reclining operation lever.

A seat cushion frame 11R that supports the seat cushions 1RA and 1RB is slidably supported via a pair of left and right slide rails 4R coupled to the vehicle body floor FL.
The slide rail 4R includes a lower rail 5R extending back and forth, and an upper rail 6R supported by the lower rail 5R so as to be displaceable in the back and forth direction. The lower rail 5R has a bottom wall whose main surface faces upward and downward and extends back and forth, left and right side walls that protrude upward at a substantially right angle from the left and right side edges of the bottom wall, and approximately from the upper edge of each bottom wall. It has an upper wall portion that projects inward at right angles. The upper rail 6R has a base portion accommodated in the lower rail 5R, and a protrusion portion that protrudes upward from the base portion through a gap between both upper wall portions of the lower rail 5R.

At the rear end of each of the pair of cushion side frames 14R that support the seat cushions 1RA and 1RB, as shown in FIGS. A locking device 30 is provided. The locking device 30 locks the rear end portions of the seat cushions 1RA and 1RB to the upper rail 6R when no operating force is applied from the outside via the cable 36. When an external operating force is applied, as shown in FIG. 3, the locking device 30 is unlocked and the seat body Sh1 is tilted forward, so that the rear ends of the seat cushions 1RA and 1RB are removed from the upper rail 6R. Separation becomes possible. The lock device 30 may lock the rear end portions of the seat cushions 1RA and 1RB with respect to the vehicle body floor FL.

The lock device 30 can have a known configuration, and is configured to be able to engage with a striker 29 attached to the upper surface of the upper rail 6R, as shown in FIG. 5, for example. The locking device 30 includes a resin housing 31 and a latch that is housed in the resin housing 31, is rotatably supported by the resin housing 31, and has a metal hook-shaped portion 32c that can be engaged with the striker 29. 32. The latch 32 is rotatably supported by the resin casing 31, with a first hole 32a penetrating in the thickness direction fitting into the outside of the first shaft 31a of the resin casing 31. The latch 32 has a groove 32b that engages with a rod-shaped portion of the striker 29, and a portion forming the outside of the groove 32b is a hook-shaped portion 32c.

Further, the latch 32 has a lock recess 32d formed at the upper right edge in the state shown in FIG. The outer circumferential portion adjacent to the left side of the lock recess 32d is an opening contact surface 32e with which the ratchet 33 comes into contact when the latch 32 is opened to maintain the open state of the latch 32. The force that the latch 32 receives from the locking portion 33c of the ratchet 33 acts to rotate the latch 32 clockwise, 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 substantially plate-shaped member made of metal, and a second hole 33a penetrating in the thickness direction fits on the outside of the second shaft 31b of the resin casing 31, so that the ratchet 33 is rotated by the resin casing 31. Possibly supported. 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 serves as a locking part 33c that comes into contact with the latch 32. The locking part 33c enters the lock recess 32d of the latch 32 when the latch 32 is in the closed state to maintain the closed state of the latch 32, and when the latch 32 is in the open state, it contacts the open abutment surface 32e and opens. It functions to maintain the state.

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

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

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

The vehicle seat S of this embodiment is provided with an unlocking drive unit 40 (unlocking drive section) 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 lock release drive unit 40 includes a housing 41, a motor 42, and a drive wheel 43 that engages to receive driving force from the motor 42. Drive wheel 43 has a coaxial drive sprocket 44 having a smaller radius than drive wheel 43 . The housing 41 houses a drive wheel 43, a drive sprocket 44, and an operating wheel 45. A cable 36 connected to the lock device 30 enters into the housing 41 via an anchor 46. The end 36a of the cable 36 is fixed to the actuation wheel 45. Actuation wheel 45 has teeth 45a that engage teeth of drive sprocket 44. When the motor 42 is driven, the actuating wheel 45 rotates via the driving wheel 43 and the driving sprocket 44 to wind the cable 36. As a result, the cable 36 is pulled and the locking device 30 is unlocked. The lock release drive unit 40 is connected to an ECU 70 (Electro Control Unit) which is an electronic control unit to be described later, and the motor 42 is driven by a command from the ECU 70 so that the lock device 30 can be unlocked. In addition, in this embodiment, the unlocking drive unit 40 is connected to the locking device 30 by the cable 36, but this is just an example, and the cable 36 may be a metal rod or link.

The vehicle seat S of this embodiment is provided with a hip-up drive unit 50 (hip-up drive section). The hip-up drive unit 50 is used to switch the seat bodies Sh1 and Sh2 between a seated state and a hip-up state. The hip-up drive unit 50 has the same configuration as the lock release drive unit 40, but instead of pulling the cable 36, it pulls the cable 36 on the front side of the cushion side frame 14R as shown in FIGS. 2, 4, and 8. , and is configured to engage with a sector gear 9d of the link mechanism 9, which will be described later. The hip-up drive unit 50 is connected to an 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 of the seat body Sh1 and the hip-up state.

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 with one end rotatably provided on the front side of the base portion 9a, and one end portion with a front link 9b rotatably provided in front of the base portion 9a. A rear link 9c is rotatably provided on the rear side of the base portion 9a and has 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 locking device 30 by the ECU 70, which will be 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 end portions of the seat cushions 1RA and 1RB are rotated. (See Figure 3). The rear end portions of the seat cushions 1RA and 1RB are positioned higher than the front end portions, and the seat body Sh1 switches from the seating state to the hip-up state.

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

The vehicle seat S of this embodiment is provided with an ECU 70 as an electronic control section. The ECU 70 includes a CPU 71, a memory 72, and an input/output IF 73 (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. Although the ECU 70 used in the vehicle seat S is provided below the seat cushions 1RA and 1RB, the position of the ECU 70 is not limited to this, and may be provided as an external device of the seat back 2RA, 2RB or the vehicle seat S. You can.

The CPU 71 is a central processing unit that executes various arithmetic processing based on programs and data stored in the memory 72. When the CPU 71 receives an instruction to put the hip-up state from the passenger via the input/output IF 73, The lock release 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 for the CPU 71. The input/output IF 73 is connected to the unlock 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 this embodiment includes a fixing bracket 80R between the pair of slide rails 4R below the seat cushions 1RA and 1RB, as shown in FIG. Two unlock 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 to extend in the width direction of the vehicle seat S so as to span between the pair of slide rails 4R. The fixing bracket 80R is arranged forward of the center C of the slide rail 4R in the front-rear direction. Therefore, the two unlock drive units 40 are arranged forward of the center C of the slide rail 4R, which is the vehicle body side support member.
Conventionally, the unlocking drive unit 40 for unlocking the locking device 30 is disposed near the locking device 30, that is, behind the seat, so that the space on the rear side of the seat is narrow. As in the vehicle seat S of this embodiment, the unlocking drive unit 40 is located forward of the center C of the slide rail 4R, thereby ensuring a space on the rear side of the seat.
In addition, when the vehicle seat does not have the slide rail 4R, the lock release drive unit 40 is preferably located in front of the center of the seat cushions 1RA, 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 to the case where the drive units are arranged separately at the front and rear, the arrangement area of the lock release drive unit 40 and the hip-up drive unit 50 can be kept within a narrow range, and a compact arrangement can be provided.
In this embodiment, the lock release 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 just an example, and the lock release drive unit 40 and the ECU 70 are fixed to the vehicle body floor FL of the vehicle seat S. The ECU 70 may be attached to the vehicle floor FL using separate fixing members. By using the fixing bracket 80R, only one part is required to fix the lock release drive unit 40, the ECU 70, and the slide drive unit 60, so an increase in the number of parts can be suppressed.

As shown in FIG. 2, the cushion pan frames 18RA and 18RB of the right seat S1 are composed of plate-shaped pan frames, and the front portions 18RAa and 18RBa of the cushion pan frames 18RA and 18RB are raised forward in side view. It is formed to be inclined. In other words, the front portions 18RAa, 18RBa are formed in a forward-sloping shape, which is an inclined surface that slopes away 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 this embodiment, the lock release drive unit 40, the slide drive unit 60, and the ECU 70 are arranged in that space. By arranging it 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.

In the fixing bracket 80R, a width W1 in the front-rear direction at a portion corresponding to the lock release drive unit 40 is larger than a width W2 in the front-rear direction at a portion corresponding to the slide drive unit 60. With this configuration, it is possible to suppress the fixing bracket 80R from increasing in size. Moreover, as shown in FIG. 9, the lock release drive unit 40, the ECU 70, and the slide drive unit 60 are arranged in the fixing bracket 80R 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 seat S2 has approximately the same structure as the right seat S1. Hereinafter, the configuration of the left seat S2 that is different from the right seat 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 longitudinally, a front member 15L spanning between the front ends of both cushion side frames 14L, and both cushion side frames 14L. It has a rear member 16L that spans between the rear ends of the frame 14, and a plate-shaped cushion pan frame 18L that spans between the left and right middle parts 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 a cushion support member of the present invention.

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

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

A seat cushion frame 11L that supports the seat cushion 1L is slidably supported via a pair of left and right slide rails 4L coupled to the vehicle body floor FL.
The slide rail 4L includes a lower rail 5L extending back and forth, and an upper rail 6L supported by the lower rail 5L so as to be movable in the back and forth direction. The structure of the slide rail 4L is similar to that of the slide rail 4R that supports the right seat S1, so a 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, like the seat cushions 1RA and 1RB of the right seat S1, A pair of locking devices 30 are provided for locking. The locking device 30 can be unlocked by pulling the cable 36, and by unlocking the locking device 30 and tilting the seat body Sh2 forward, the rear end of the seat cushion 1L is separated from the vehicle floor FL. It becomes possible.

A four-section link mechanism 9 is provided on the front side of the cushion side frame 14L, similar to the cushion side frame 14R of the right seat S1. 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.

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

Since the lock release drive unit 40 is located forward of the center C of the slide rail 4L, a space on the rear side of the seat is secured. In addition, in the case of a seat that does not have the slide rail 4L, the lock release drive unit 40 is preferably 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 constituted 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 to be inclined upwardly toward the front when viewed from the side. 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 it in this way, it becomes possible to install the unlocking drive unit 40 by effectively utilizing the space below the seat body Sh2.

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

In the vehicle seat S shown in FIGS. 2 and 8, the lock release drive unit 40 is located at the raised front portions 18RAa, 18RBa of the cushion pan frames 18RA, 18RA, 18L (hereinafter collectively referred to as cushion pan frames 18). , 18La (hereinafter referred to collectively as the front portion 18a) are fixed in a space formed below using fixing brackets 80R and 80L. This is just an example, and the lock release drive unit 40 may be attached to the lower surface of the front portion 18a of the cushion pan frame 18, as shown in FIGS. 10, 11A, and 11B. By attaching the lock release drive unit 40 to the lower surface of the front portion 18a, the lock release drive unit 40 can be attached to the seat cushions 1RA, 1RA, 1L ( (hereinafter collectively referred to as the seat cushion 1). Since the positional relationship between the locking device 30 provided at the rear of the seat cushion 1 and the unlocking drive unit 40 does not change, the cable 36 connecting the locking device 30 and the unlocking drive unit 40 is also not moved. , the cable 36 is prevented from coming into contact with other members, and damage can be prevented.

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

Further, as shown in FIG. 11A, the beads 81 may be arranged near both sides of the cushion pan frame 18. When the lock release drive unit 40 is attached to the cushion pan frame 18 in which the beads 81 are arranged on both sides, the lock release drive unit 40 is preferably arranged so as to overlap the beads 81 vertically. By arranging it in this way, the support rigidity for supporting the lock release drive unit 40 can be improved.

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

S Vehicle seat S1 Right seat S2 Left seat T Trim cover P Pad member FL Vehicle 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 link 9c Rear link 9d Sector gear F1, F2 Seat frame 11R, 11L Seat cushion frame 12RA, 12RB, 12L Seat back frame 14R, 14L Cushion side frames 15R, 15L Front members 16R, 16L Rear members 17R, 17L Seat back support parts 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 Lock device 31 Resin casing 31a No. 1st shaft 31b 2nd shaft 32 Latch 32a 1st hole 32b Groove 32c Hooked part 32d Lock recess 32e Open contact surface 32f Pin 33 Ratchet 33a 2nd hole 33b Main body 33c Lock retaining part 33d Arm 33e Hook 33f Hole 33g Rivet 34 Lever member 34a Operating arm 35 Tension spring 36 Cable 36a End 40 Lock release drive unit (lock release 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 Input/output 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 is 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 floor side;
a locking device that locks a rear end portion 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;
The locking device is arranged rearward of the center of the seat cushion in the front-rear direction,
The lock release drive unit and the hip-up drive unit are arranged forward of the center of the seat cushion or the vehicle body support member in the front-rear direction ,
A fixing bracket is provided below the seat cushion,
A vehicle seat , wherein the unlocking drive unit and the electronic control unit are arranged on the fixing bracket . a seat body having a seat cushion and capable of switching between a seated state in which an occupant is 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 floor side;
a locking device that locks a rear end portion 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;
The locking device is arranged rearward of the center of the seat cushion in the front-rear direction,
The lock release drive unit and the hip-up drive unit are arranged forward of the center of the seat cushion or the vehicle body support member in the front-rear direction ,
comprising a cushion support member that supports the seat cushion from below,
The lock release drive unit is attached to the cushion support member,
The cushion support member is constituted by a plate-shaped pan frame,
The pan frame is formed with a bead extending in the front-rear direction and projecting downward,
A vehicle seat, wherein the lock release drive section is arranged to overlap the bead in a vertical direction. a seat body having a seat cushion and capable of switching between a seated state in which an occupant is 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 floor side;
a locking device that locks a rear end portion 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;
The locking device is arranged rearward of the center of the seat cushion in the front-rear direction,
The lock release drive unit and the hip-up drive unit are arranged forward of the center of the seat cushion or the vehicle body support member in the front-rear direction ,
comprising a cushion support member that supports the seat cushion from below,
The lock release drive unit is attached to the cushion support member,
The cushion support member is constituted by a plate-shaped pan frame,
The pan frame is formed with a bead extending in the front-rear direction and projecting downward,
A vehicle seat, wherein the lock release drive section is arranged to avoid the bead. comprising a cushion support member that supports the seat cushion from below,
A front portion of the cushion support member is formed to be inclined upwardly in a side view,
The vehicle seat according to any one of claims 1 to 3, wherein the lock release drive unit is disposed in a space below the raised front portion of the cushion support member. A fixing bracket is provided below the seat cushion,
The vehicle seat according to claim 2 or 3, wherein the unlocking drive section and the electronic control section are arranged on the fixing bracket. The vehicle body side support member is a slide rail that slides the seat cushion along the longitudinal 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 that slides the slide rail,
The vehicle seat according to claim 1 or 5 , wherein the slide drive section is arranged on the fixing bracket. 7. The fixing bracket according to claim 6 , wherein a portion of the fixing bracket corresponding to the unlocking drive portion is wider in the front-rear direction than a portion corresponding to the slide drive portion. Vehicle seat as described. 8. The lock release drive section, the slide drive section, and the electronic control section are arranged on the fixing bracket in a line in the width direction of the seat body. Vehicle seat. The vehicle seat according to claim 4 or 5 , wherein the unlocking drive section is attached to the cushion support member.

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