JP4476635B2 - Vehicle seat with tilt mechanism - Google Patents

Description

  The present invention relates to a vehicle seat with a tilt mechanism having a tilt mechanism that lifts a front side portion of a cushion body of a seat seat portion from below.

Various types of vehicle seats are known in the art. For example, a vehicle seat described in Patent Document 1 is known.
The vehicle seat described in Patent Document 1 includes a pair of left and right arms that are part of a frame extending along the left and right side edges of the cushion body, and the cushion body to support the cushion body of the seat seat portion. And a rear frame extending along the rear edge. Further, the vehicle seat also has a tilt mechanism that lifts the front portion of the cushion body of the seat seat portion from below.
The tilt mechanism has a tilt plate extending along the front edge of the cushion body of the seat seat portion, and the tilt plate is attached to the front end portion of the arm so that the rear end portions of the left and right ends can be rotated. Yes. The tilt plate is provided with a mounting portion at a position ahead of the pivot point of the arm. The mounting portion has a front end of an elastic member that extends forward from the rear frame and supports the cushion body from below. The part is installed.
Therefore, by rotating the tilt plate with respect to the arm, the front end portion of the tilt plate rotates up and down, and the front end portion of the elastic member moves up and down together with the tilt plate. Therefore, the cushion body is lifted by both the tilt plate and the elastic member.
JP 2000-190762 A

However, the tilt mechanism according to Patent Document 1 has an angle difference between the tilt angle of the tilt plate and the tilt angle of the elastic member. This angle difference has caused a step on the seating surface of the cushion body.
Then, this invention makes it a subject to provide the vehicle seat provided with the tilt mechanism which can prevent effectively that a level | step difference arises in the seat surface of the cushion body of a seat seat part.

In order to solve the above-described problems, the present invention is a vehicle seat with a tilt mechanism having a configuration as described in each claim.
According to the first aspect of the present invention, the tilt mechanism includes a tilt plate extending along the front edge of the cushion body, and an intermediate member provided between the tilt plate and the front frame. The intermediate member is pivotally connected to each of the tilt plate and the front frame, so that the tilt plate rotates with respect to the front frame via the intermediate member, and the cushion body is moved from the lower side. It can be lifted. A mounting portion is provided in the vicinity of the rotating portion between the intermediate member and the tilt plate, and the mounting portion includes a front end portion of an elastic member that extends forward from the rear frame and supports the cushion body from below. Is installed.

That is, the tilt mechanism has an intermediate member between the tilt plate and the front frame. The intermediate member is pivotally connected to the tilt plate and the front frame.
Therefore, the tilt plate is connected to the front frame so as to be rotatable about at least two rotation fulcrums. Therefore, the tilt plate is configured to be able to change the tilt angle flexibly with respect to the front frame.
A front end portion of the elastic member is attached in the vicinity of the rotating portion between the tilt plate and the intermediate member. Therefore, a step in the height direction is hardly generated between the tilt plate and the front end portion of the elastic member. Furthermore, since the tilt angle of the tilt plate can be flexibly changed as described above, it can flexibly correspond to the tilt angle of the elastic member. Therefore, a step due to an angle difference between the tilt angle of the tilt plate and the tilt angle of the elastic member is unlikely to occur between the tilt plate and the elastic member. Thus, the tilt mechanism can effectively prevent a step from being generated on the seating surface of the cushion body of the seat seat portion, and can lift the cushion body of the seat seat portion in a gentle state.

According to the second aspect of the present invention, the front frame is plate-shaped, and the tilt plate is disposed on the upper surface thereof. An airbag for lifting the tilt plate is installed between the front frame and the tilt plate.
Therefore, the tilt plate moves up and down with respect to the front frame by inflating and deflating the airbag. Further, (as described in claim 1), the tilt plate rotates with respect to the front frame via the intermediate member. Therefore, the tilt plate rotates about at least two rotation fulcrums, and the inclination angle can change flexibly in response to the inflation / deflation of the airbag. Thus, the tilt plate receives a force from the airbag with good stability and can be moved up and down with good stability.

  According to invention of Claim 3, it has a pair of left-right arm which is a part of flame | frame extended along the left-right side edge of a seat seat part. The tilt mechanism includes a tilt plate extending along the front edge of the cushion body, and a pair of left and right intermediate members provided between the tilt plate and each arm. The intermediate member is pivotally connected to each of the tilt plate and the arm, so that the tilt plate can rotate with respect to the arm via the intermediate member and lift the cushion body from below. It is configured. The tilt plate is provided with an attachment portion. The attachment portion is attached with a front end portion of an elastic member that extends forward from the rear frame and supports the seat seat portion from below.

That is, the tilt mechanism has an intermediate member between the tilt plate and the arm. The intermediate member is pivotally connected to the tilt plate and the arm.
Therefore, the tilt plate is connected to the arm so as to be rotatable about at least two rotation fulcrums. Therefore, the tilt plate is configured to be able to change the tilt angle flexibly with respect to the arm.
The front end portion of the elastic member is attached to the tilt plate. Therefore, a step in the height direction is hardly generated between the tilt plate and the front end portion of the elastic member. Furthermore, since the tilt angle of the tilt plate can be flexibly changed as described above, it can flexibly correspond to the tilt angle of the elastic member. Therefore, a step due to an angle difference between the tilt angle of the tilt plate and the tilt angle of the elastic member is unlikely to occur between the tilt plate and the elastic member. Thus, the tilt mechanism can effectively prevent a step from being generated on the seating surface of the cushion body of the seat seat portion, and can lift the cushion body of the seat seat portion in a gentle state.

According to the fourth aspect of the present invention, the tilt mechanism can be lifted while adjusting the tilt angle of the tilt plate with respect to the passenger compartment floor surface to be substantially the same as the inclination angle of the elastic member with respect to the passenger compartment floor surface. ing.
In other words, the tilt plate is lifted while being adjusted so that the tilt angle is substantially the same as the tilt angle of the elastic member.
Therefore, there is almost no angle difference between the tilt angle of the tilt plate and the tilt angle of the elastic member. And the level | step difference which may arise in the seat surface of a cushion body by an angle difference does not arise. Therefore, the tilt mechanism can lift the cushion body of the seat seat portion in a gentle state.

(Embodiment 1)
The first embodiment will be described with reference to FIGS.
As shown in FIG. 1, the vehicle seat 1 includes a seat seat portion 10 and a seat back 11. The vehicle seat 1 also includes a tilt mechanism 2 that lifts the front portion of the seat seat portion 10, a front slip prevention means 3 that prevents a passenger seated on the seat seat portion 10 from sliding forward, and a gas such as air. And a gas supply device 4 to be supplied.
The seat portion 10 has a bone frame body 13 and a cushion body 14. In order to support the cushion body 14, the bone frame body 13 extends in the vehicle front-rear direction along the front frame 13 a extending in the vehicle width direction along the front edge of the cushion body 14 and the left and right side edges of the cushion body 14. A pair of arms 13b extending and a rear frame 13c extending along the rear edge of the cushion body 14 are provided. A cushion body 14 is attached to the upper side of the bone frame body 13. And the lower end part of the seat back 11 is rotatably attached to the rear end of the arm 13b.

As shown in FIG. 2, the cushion body 14 has a cushion pad 14a formed of polyurethane or the like, and a skin material 14b that covers the surface of the cushion pad 14a.
The seat back 11 also has a bone frame body and a cushion body similarly to the seat seat portion 10, and the cushion body has a cushion pad and a skin material. A headrest 12 is attached to the upper end of the seat back 11 so as to be movable in the vertical direction.

The tilt mechanism 2 includes a tilt plate 20, an intermediate member 22, and an airbag 21 (actuator) as shown in FIG.
As shown in FIG. 5, the tilt plate 20 and the intermediate member 22 are both plate members that extend in the vehicle width direction along the front end of the cushion body (14).
The intermediate member 22 is installed above the rear end side of the plate-like front frame 13a. The rear end portion of the intermediate member 22 and the rear end portion of the front frame 13a are connected to each other via a plurality of (for example, two) hinges 23 so as to be rotatable. And the front-end | tip part (front-end part) of the intermediate member 22 and the rear-end part of the tilt plate 20 are connected via the multiple (for example, two) hinges 24 so that rotation is possible.

The tilt plate 20 has a free end on the front end side. Thus, only the rear end side of the tilt plate 20 is rotatably attached to the front frame 13a via the intermediate member 22. The tilt plate 20 is pivotably attached to the front frame 13a via a plurality of pivot shafts (two hinges 23 and 24 in this embodiment).
Further, a leg 20a is formed at the front end of the tilt plate 20, as shown in FIG. The leg portion 20a is configured to extend from the front end portion of the tilt plate 20 toward the front frame 13a. And the leg part 20a is the structure which can contact | abut with respect to the front frame 13a in the state which the airbag 21 is not inflated, and can straddle with respect to the front frame 13a.

Further, as shown in FIGS. 2 and 5, a plurality of attachment portions 25 for attaching one end portion of the elastic member 5 are provided on the upper surface on the rear edge side of the tilt plate 20. As shown in FIG. 5, a plurality of elastic members 5 are attached to the tilt plate 20.
The elastic member 5 is, for example, a wire spring formed in a continuous S-shape, and extends in the vehicle front-rear direction while meandering in the vehicle width direction. The rear end portion of the elastic member 5 is attached to the rear frame 13c (see FIG. 1). As shown in FIG. 2, the cushion body 14 is placed on the upper side of the elastic member 5. Thus, the cushion body 14 is elastically supported from the lower side by the elastic member 5.

  The airbag 21 is a bag member that expands when a gas such as air is blown. As shown in FIG. 2, the airbag 21 is disposed between the lower surface of the tilt plate 20 and the upper surface of the front frame 13a. As shown in FIG. 5, the airbag 21 is connected to the gas supply device 4 through a pipe 26.

The front slip prevention means 3 has an airbag 30 as shown in FIG.
The airbag 30 is a bag member that expands when a gas such as air is blown. As shown in FIG. 2, the airbag 30 is disposed between the upper surface of the tilt plate 20 and the lower surface of the seat seat portion 10. And the airbag 30 is pipe-connected with the gas supply apparatus 4 via the piping 31, as shown in FIG.

The gas supply device 4 is attached to the lower side of the front frame 13a as shown in FIG. 5, and has an air pump 40 as shown in FIG.
The air pump 40 takes in gas from the atmosphere and forcibly supplies the gas to the airbag 21 or the airbag 30.
A switching valve 42 and an on-off valve 43 are provided between the air pump 40 and the airbag 21.
The switching valve 42 is provided on the downstream side of the air pump 40 and is provided at a branch point between the pipe 26 and the pipe 31. The switching valve 42 is in a state where the gas from the air pump 40 can be supplied to the airbag 21 via the pipe 26 (normal state) and a state where the gas can be supplied to the airbag 30 via the pipe 31 (emergency state). Switch.

  The on-off valve 43 is provided at the proximal end portion of the exhaust pipe 44 extending from the middle of the pipe 26. The on-off valve 43 switches between a state where the exhaust pipe 44 and the pipe 26 are disconnected (closed state) and a state where the exhaust pipe 44 and the pipe 26 are communicated (open state). When the on-off valve 43 is opened, the pipe 26 communicates with the atmosphere via the exhaust pipe 44.

Further, the vehicle is provided with an operating means for operating the tilt mechanism 2 (not shown in FIG. 1 or the like).
The operation means includes an operation unit operated by a passenger, and a control unit that controls the on-off valve 43 and the air pump 40 based on a signal generated from the operation unit (see FIG. 6).
Hereinafter, a method of lifting the front side portion of the cushion body 14 of the seat seat portion 10 from the lower side by the tilt mechanism 2 and the state thereof will be described.
First, the opening / closing valve 43 is closed by the operating means, and the air pump 40 is driven. As a result, gas is supplied to the airbag 21 via the pipe 26 by the air pump 40. Then, the airbag 21 is inflated as shown in FIG. 3, and the tilt plate 20 is lifted by the airbag 21.

Then, the tilt plate 20 rotates with respect to the intermediate member 22, and the intermediate member 22 rotates with respect to the front frame 13a. Thus, the tilt plate 20 moves upward with respect to the front frame 13a via the intermediate member 22, and moves backward.
At this time, the front end portion of the elastic member 5 is lifted together with the tilt plate 20. Then, the inclination angle of the elastic member 5 with respect to the passenger compartment floor is increased.
The tilt plate 20 is urged rearward by the urging force of the elastic member 5. The tilt plate 20 is lifted by the airbag 21 while being adjusted to substantially the same angle as the inclination angle of the elastic member 5 by using the biasing force of the elastic member 5. The front portion of the cushion body 14 is lifted by the tilt plate 20 and the elastic member 5.

The maximum angle at which the front portion of the cushion body 14 is lifted by the tilt mechanism 2 is regulated by the maximum inflated state of the airbag 21. For example, the maximum is about 3 to 5 degrees with respect to the passenger compartment floor.
On the other hand, when lowering the front side portion of the cushion body 14 from the raised state, by operating the operating means, the open / close valve 43 is opened and the air pump 40 is stopped (see FIG. 6). As a result, the gas stored in the airbag 21 is released to the atmosphere via the pipe 26 and the exhaust pipe 44. Then, the airbag 21 is contracted, the tilt plate 20 is lowered, and the front portion of the cushion body 14 is lowered.

The vehicle is provided with a collision prediction detection means. The collision prediction detection unit is a unit that detects and predicts before collision that the vehicle is highly likely to collide, and includes, for example, a detection unit and a control unit.
A detection part detects the depression amount of a brake pedal with a sensor, and detects the distance of a front obstacle and a vehicle using a radar, infrared rays, a sound wave, etc. And a control part calculates the braking time etc. of a brake from the signal from a detection part, and the speed of a vehicle, and calculates a collision possibility. A signal is issued when it is determined that the possibility of a collision is high. Based on the signal, the switching valve 42 is switched to the emergency state and the air pump 40 is driven (see FIG. 6).

As a result, gas is supplied from the air pump 40 to the airbag 30. Then, the airbag 30 is inflated as shown in FIG. 4, and the airbag 30 lifts the front side portion of the cushion body 14. Since the airbag 30 at this time has the tilt plate 20 on the lower surface, the cushion body 14 can be lifted stably.
The maximum bulge amount of the airbag 30 is set to a diameter of about 140 mm (for example, 140 ± 10 mm). This is determined in order to effectively prevent the front slip, and lifting the cushion body 14 by about 140 mm with respect to the standard occupant is effective in preventing the front slip. This is because it is known from experiments.

Further, the controller of the collision prediction detection means opens the on-off valve 43 when it is predicted that the possibility of collision is high, and contracts the airbag 21 of the tilt mechanism 2 (see FIG. 6). Thus, the cushion body 14 in the emergency state is lifted only by the airbag 30 of the front slip prevention means 3 regardless of the state of the tilt mechanism 2 before the emergency state. Thereby, the cushion body 14 is always in a constant form in an emergency.
The airbag 30 has an air vent hole although not shown in FIG. The air vent hole is configured such that after the airbag 30 is completely inflated, the gas in the airbag 30 can be gradually extracted. Thus, the airbag 30 is configured to gradually contract by using the air vent hole.

The vehicle seat 1 is formed as described above.
That is, the tilt mechanism 2 has an intermediate member 22 between the tilt plate 20 and the front frame 13a as shown in FIG. An intermediate member 22 is provided so as to be rotatable with respect to the tilt plate 20 and the front frame 13a.
Therefore, the tilt plate 20 is connected to the front frame 13a so as to be rotatable about at least two rotation fulcrums (23, 24). Therefore, the tilt plate 20 is configured to be able to change the tilt angle flexibly with respect to the front frame 13a as shown in FIG.

A front end portion of the elastic member 5 is attached in the vicinity of the rotating portion between the tilt plate 20 and the intermediate member 22. Therefore, a step in the height direction is hardly generated between the tilt plate 20 and the front end portion of the elastic member 5. Furthermore, since the tilt angle of the tilt plate 20 can be flexibly changed as described above, it can flexibly correspond to the tilt angle of the elastic member 5.
Therefore, a step due to an angle difference between the tilt angle of the tilt plate 20 and the tilt angle of the elastic member 5 is unlikely to occur between the tilt plate 20 and the elastic member 5. Thus, the tilt mechanism 2 can effectively prevent a step from occurring on the seat surface of the cushion body 14 of the seat seat portion 10 and can lift the cushion body 14 of the seat seat portion 10 in a gentle state.

The front frame 13a is plate-shaped as shown in FIG. 2, and a tilt plate 20 is disposed on the upper surface thereof. An air bag 21 for lifting the tilt plate 20 is installed between the front frame 13a and the tilt plate 20.
Therefore, the tilt plate 20 moves up and down with respect to the front frame 13a by inflating and deflating the airbag 21. Further, the tilt plate 20 rotates with respect to the front frame 13 a via the intermediate member 22. Therefore, the tilt plate 20 rotates around at least two rotation fulcrums (23, 24), and the inclination angle can change flexibly with respect to the inflation / deflation of the airbag 21. Thus, the tilt plate 20 receives a force from the airbag 21 with good stability and can be moved up and down with good stability.

Further, as shown in FIG. 3, the tilt plate 20 is lifted while being adjusted so that the tilt angle is substantially the same as the tilt angle of the elastic member 5.
Therefore, there is almost no angle difference between the tilt angle of the tilt plate 20 and the tilt angle of the elastic member 5. And the level | step difference which may arise in the seat surface of the cushion body 14 by an angle difference does not arise. Therefore, the tilt mechanism 2 can lift the cushion body 14 of the seat seat portion 10 in a gentle state.

(Embodiment 2)
The second embodiment will be described with reference to FIG. The second embodiment is formed in substantially the same manner as the first embodiment. However, the second embodiment is different from the first embodiment in that a gas supply device 4 shown in FIG. 7 is provided instead of the gas supply device shown in FIG. Hereinafter, the second embodiment will be described with a focus on differences from the first embodiment.
The gas supply device 4 according to Embodiment 2 has an air pump 40 and an air cylinder 41 as shown in FIG. The air cylinder 41 is configured to store gas and maintain the pressure of the gas, and is provided between the air pump 40 and the airbag 30 of the front slip prevention means 3. Further, the gas supply device 4 has a check valve 47 between the air cylinder 41 and the air pump 40, and has an opening / closing valve 46 between the air pump 40 and the airbag 30. Thus, the air cylinder 41 is configured to store the pressure of the gas supplied from the air cylinder 41 by closing the on-off valve 46.

On-off valves 48 and 43 are provided between the air pump 40 and the airbag 21 of the tilt mechanism 2. The on-off valve 48 opens the pipe 26 and can supply the gas from the air pump 40 to the airbag 21 (opened state), and closes the pipe 26 and cannot supply the gas from the air pump 40 to the airbag 21. Switch to (closed state).
The on-off valve 43 is provided at the proximal end of the exhaust pipe 44 extending from the middle of the pipe 26, and the exhaust pipe 44 and the pipe 26 are disconnected (closed), and the exhaust pipe 44 It switches to the state (open state) which connects the piping 26.

Hereinafter, a method for inflating the airbag 21 of the tilt mechanism 2 will be described.
First, the on-off valve 48 is opened by operating the operating means, and the on-off valve 43 and the on-off valve 46 are closed. Then, the air pump 40 is driven. Thereby, the gas from the air pump 40 is supplied to the airbag 21, and the airbag 21 is inflated by the gas. At this time, the gas from the air pump 40 is also supplied to the air cylinder 41. The gas pressure is stored in the air cylinder 41.
On the other hand, when the airbag 21 of the tilt mechanism 2 is deflated, the opening / closing valve 43 is opened by operating the operating means, and the air pump 40 is stopped. Thereby, the pressure in the airbag 21 is released through the exhaust pipe 44, and the airbag 21 contracts.

The on-off valve 46 is normally closed, but in an emergency, it is opened by the collision prediction means. For this reason, the gas in the air cylinder 41 is supplied to the airbag 30 in an emergency, and the airbag 30 is inflated by the gas.
In an emergency, the on-off valve 48 is closed and the on-off valve 43 is opened based on a signal from the collision prediction means. As a result, the airbag 21 contracts, and the cushion body is lifted from below only by the airbag 30 of the front slip prevention means 3. Thus, the cushion body of the seat seat portion is always in a certain form in an emergency.

(Embodiment 3)
A third embodiment will be described with reference to FIGS.
The third embodiment is formed in substantially the same manner as the first embodiment. However, the tilt mechanism according to the third embodiment has a pair of intermediate members 6 shown in FIG. 8 instead of the intermediate member 22 (intermediate member) shown in FIG. And the bone frame 13 which concerns on Embodiment 3 does not have the front frame 13a shown in FIG. Hereinafter, the third embodiment will be described with a focus on differences from the first embodiment.

As shown in FIG. 8, the bone frame body 13 includes a pair of left and right arms 13 b that are part of a frame extending along the left and right side edges of the cushion member of the seat seat portion, and the rear edge of the cushion member of the seat seat portion. And a rear frame 13c extending along. A tilt plate 7 is provided between the distal ends of the pair of left and right arms 13b.
The tilt plate 7 extends along the front edge of the cushion body of the seat seat portion. The tilt plate 7 is attached so that both left and right end portions can rotate with respect to the arm 13b via the intermediate member 6.
As shown in FIG. 8, the intermediate member 6 has a rear end portion rotatably attached to the front end portion of the arm 13 b, and a front end portion (front end portion) is attached to the rear left and right ends of the tilt plate 7 to be rotatable. It has been. The intermediate member 6 rotates about the rotation pin 60 with respect to the arm 13b, and rotates about the rotation pin 61 with respect to the tilt plate 7.

A plurality of attachment portions 25 for attaching the front end portion of the elastic member 5 are provided on the upper surface on the rear end portion side of the tilt plate 7. A plurality of elastic members 5 are attached to the tilt plate 7.
The elastic member 5 extends in the vehicle front-rear direction while meandering in the vehicle width direction, and its rear end is attached to the rear frame 13c.
Next, a state where the tilt plate 7 is moved up and down will be described.
The tilt plate 7 moves up and down between a lower position shown in FIG. 9 and an upper position shown in FIG. At the lower position, as shown in FIG. 9, the tilt plate 7, the intermediate member 6, and the arm 13b are arranged in a substantially straight line at substantially the same height.

When lifting the tilt plate 7 from the lower position to the upper position, the intermediate member 6 rotates about the rotation pin 60 relative to the arm 13b. Then, the tilt plate 7 rotates with respect to the intermediate member 6 around the rotation pin 61. As a result, the tilt plate 7 moves upward and backward with respect to the arm 13b as shown in FIG.
Further, the tilt plate 7 is gradually moved from the lower position to the upper position so that the front end side is gradually raised, and the inclination angle with respect to the passenger compartment floor surface is gradually increased.
The tilt plate 7 is urged rearward by the urging force of the elastic member 5. The tilt plate 7 moves upward while being adjusted to substantially the same angle as the inclination angle of the elastic member 5 by using the biasing force of the elastic member 5.

As described above, the vehicle seat according to the third embodiment is formed.
That is, the tilt mechanism 2 has an intermediate member 6 between the tilt plate 7 and the arm 13b as shown in FIG. The intermediate member 6 is rotatably connected to the tilt plate 7 and the arm 13b.
Therefore, the tilt plate 7 is connected to the arm 13b so as to be rotatable about at least two rotation fulcrums (60, 61). Therefore, the tilt plate 7 is configured to be able to change the tilt angle flexibly with respect to the arm 13b.

  Further, the front end of the elastic member 5 is attached to the tilt plate 7 as shown in FIG. Therefore, a step in the height direction is hardly generated between the tilt plate 7 and the front end portion of the elastic member 5. Furthermore, since the tilt angle of the tilt plate 7 can be changed flexibly as described above, the tilt angle of the elastic member 5 can be flexibly dealt with. Therefore, a step due to an angle difference between the tilt angle of the tilt plate 7 and the tilt angle of the elastic member 5 is unlikely to occur between the tilt plate 7 and the elastic member 5. Thus, the tilt mechanism can effectively prevent a step from being generated on the seating surface of the cushion body of the seat seat portion, and can lift the cushion body of the seat seat portion in a gentle state.

(Other embodiments)
The present invention is not limited to the first to third embodiments, and may be the following modes.
(1) That is, the tilt mechanism according to the first and second embodiments has an air bag as an actuator that moves the tilt plate up and down. However, the tilt mechanism according to the first and second embodiments may have another actuator instead of the airbag. For example, a configuration may be adopted in which a lead screw (lead screw) standing on the floor of the passenger compartment and a motor that moves the tilt plate up and down by rotating the lead screw are pivoted. Or the form which has an atmospheric | air pressure cylinder which expands-contracts using atmospheric | air pressure may be sufficient. And the form which provides the mechanism in Embodiment 3 may be sufficient.
(2) The mounting portion 25 according to the first and second embodiments is provided at the rear end portion of the tilt plate 20 as shown in FIG. However, the mounting portion may be provided near the rotating portion between the tilt plate and the intermediate member and provided on the intermediate member side.
(3) The intermediate members (22, 6) according to the first to third embodiments are each in the form of one piece. However, the intermediate member may be provided with a plurality of members that are rotatably connected. In this embodiment, the tilt plate can be rotated around three or more rotation fulcrums with respect to the bone frame.

1 is a perspective view of a vehicle seat according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 3 is a partial cross-sectional view of the vehicle seat corresponding to FIG. 2, showing a state in which the cushion body of the seat seat portion is lifted by the tilt mechanism. FIG. 3 is a partial cross-sectional view of the vehicle seat corresponding to FIG. 2, showing a state in which the cushion body of the seat seat is lifted by the front slip prevention means. 3 is an upper perspective view of the bone frame, the tilt mechanism, and the front slip prevention means according to Embodiment 1. FIG. It is a schematic diagram which shows piping between the gas supply apparatus which concerns on Embodiment 1, the airbag of a tilt mechanism, and the airbag of a front slip prevention means. It is a schematic diagram which shows piping between the gas supply apparatus which concerns on Embodiment 2, the airbag of a tilt mechanism, and the airbag of a front slip prevention means. 10 is a top perspective view of a bone frame, an intermediate member, a tilt plate, and an elastic member according to Embodiment 3. FIG. FIG. 10 is a left side view of a bone frame, an intermediate member, a tilt plate, and an elastic member according to Embodiment 3. FIG. 10 is a left side view of a bone frame, an intermediate member, a tilt plate, and an elastic member according to Embodiment 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 2 ... Tilt mechanism 3 ... Front slip prevention means 4 ... Gas supply device 5 ... Elastic member 10 ... Seat seat part 13 ... Bone frame 13a ... Front frame 13b ... Arm 13c ... Rear frame 14 ... Cushion body 20 7, tilt plate 21 ... airbag 22 ... intermediate members 23, 24 ... hinge 25 ... mounting portion 30 ... airbag

Claims (4)

A front frame extending along a front edge of the cushion body and a rear frame extending along a rear edge of the cushion body to support the cushion body of the seat seat portion; A vehicle seat with a tilt mechanism having a tilt mechanism that lifts the front part of the body from below,
The tilt mechanism includes a tilt plate extending along a front edge of the cushion body, and an intermediate member provided between the tilt plate and the front frame, and the intermediate member is the tilt plate The tilt plate can be pivoted with respect to the front frame via the intermediate member to lift the cushion body from the lower side. It is composed
An attachment portion is provided in the vicinity of the rotating portion between the intermediate member and the tilt plate, and the attachment portion extends from the rear frame to the front of the vehicle and supports the cushion body from below. A vehicle seat with a tilt mechanism, wherein a front end portion of the vehicle is attached. The vehicle seat with a tilt mechanism according to claim 1,
The front frame is plate-shaped, and the tilt plate is disposed on an upper surface thereof.
A vehicle seat with a tilt mechanism, wherein an airbag for lifting the tilt plate is installed between the front frame and the tilt plate. In order to support the cushion body of the seat seat portion, a pair of left and right arms, which are part of a frame extending along the left and right side edges of the cushion body of the seat seat portion, and the rear edge of the cushion body are extended. A vehicle seat with a tilt mechanism having a rear frame to be taken out and having a tilt mechanism that lifts the front side portion of the cushion body from below,
The tilt mechanism includes a tilt plate extending along a front edge of the cushion body, and a pair of left and right intermediate members provided between the tilt plate and the arms, and the intermediate member includes: Since the tilt plate and the arm are rotatably connected, the tilt plate rotates with respect to the arm via the intermediate member and lifts the cushion body from below. It is a structure to obtain,
The tilt plate is provided with an attachment portion, and the attachment portion is attached with a front end portion of an elastic member that extends forward from the rear frame and supports the seat seat portion from below. A vehicle seat with a tilt mechanism. A tilt mechanism attached vehicle seat according to any one of claims 1 to 3,
With the tilt mechanism, the tilt mechanism can be lifted while adjusting the tilt angle of the tilt plate with respect to the passenger compartment floor surface to be substantially the same as the inclination angle of the elastic member with respect to the passenger compartment floor surface. Vehicle seat.

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