Vehicle seat device

Abstract

To provide a configuration in which a single motor can operate both a height mechanism and a tilt mechanism.SOLUTION: A right-side adjustment mechanism 30a includes: a rotating body 31 and a tilt gear 32 that are assembled to a shaft 61 which rotates according to rotation of a first motor 51; a link 33 that is connected to the rotating body 31 and a riser 25a in a tiltable manner so that a seat surface angle θ1 is changed according to rotation of the rotating body 31; and a tilting body 34 that changes a tilting angle θ2 by tilting a front frame 14 relative to a side frame 12a during the tilting motion that utilizes rotation of the tilt gear 32. The tilting body 34 is formed with a sector gear 34a that meshes with the tilt gear 32 in a first operating state and a pair of sliding contact portions 34b, 34c that slidingly contact tips of the teeth of the tilt gear 32 rotating in a second operating state.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat device capable of adjusting the position of a vehicle seat. [Background technology]

[0002] Conventionally, as a vehicle seat device capable of adjusting the position of a vehicle seat, for example, a vehicle seat lifter and a vehicle clutch unit disclosed in the following Patent Document 1 are known. The vehicle seat lifter includes a sector gear that meshes with a pinion gear of the vehicle clutch unit and a link mechanism, and is configured so that each link member of the link mechanism tilts as the sector gear rotates in accordance with the rotation of the pinion gear, and the height of the vehicle seat is adjusted in accordance with the tilt of each link member. The vehicle clutch unit is configured to include various mechanical members such as an operation lever, an input-side clutch, and an output-side clutch in addition to an output shaft member on which the pinion gear is formed. The input-side clutch transmits the rotation of the operating lever to the output-side clutch by rotating the input-side inner ring member, the input-side outer ring member, and the input-side transmission member as the operating lever rotates, and is configured to input the rotation of the operating lever to the output-side clutch during a driving operation to drive the operating lever from the neutral position, and to return the operating lever to the neutral position while maintaining the rotational position of the output shaft member during a return operation to return the operating lever to the neutral position after driving the operating lever. The output-side clutch is configured to restrict rotation of the output shaft member due to a force input to the output shaft member from the vehicle seat side, but to allow rotation of the output shaft member when the rotation of the operating lever is transmitted by the input-side clutch.

[0003] With this configuration, when the operating lever is rotated in a direction to raise (lower) the height of the vehicle seat, the sector gear rotates in accordance with the rotation of the pinion gear rotating in that direction, and each link member of the link mechanism tilts to raise (lower) the height of the vehicle seat. After such height adjustment, when the force input to the operating lever is released, the operating lever returns to the neutral position, and in this state, the rotation of the output shaft member is restricted by the vehicle clutch unit, so that even if a force in the vertical direction is applied to the vehicle seat, the vehicle seat is prevented from moving in the vertical direction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-128820 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the adjustable posture of a vehicle seat includes the tilt angle of the seat cushion's seat surface and the height of the front end of the seat cushion, and vehicle seat devices employing an adjustment mechanism (height mechanism) for adjusting the tilt angle of the seat cushion's seat surface and a vehicle seat device employing an adjustment mechanism (tilt mechanism) for adjusting the height of the front end of the seat cushion are known. Therefore, while it is possible to adjust both the tilt angle of the seat cushion's seat surface and the height of the front end of the seat cushion with a single vehicle seat device, it is necessary to provide both the height mechanism and the tilt mechanism in a single vehicle seat device, which creates a problem of a complex structure due to the need to arrange motors, reducers, etc. for each.

[0006] The present invention has been made to solve the above-mentioned problems, and its object is to provide a configuration in which the height mechanism and tilt mechanism can be operated by a single motor. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a cushion frame (12a, 12b) for forming a skeleton of the seat cushion; a front frame (14) tiltably assembled to the front side of the cushion frame for adjusting the height of the front end of the seat cushion in accordance with a tilt angle (θ2) relative to the cushion frame; a base member (25a, 25b) disposed on a floor surface below the cushion frame; a pair of left and right adjustment mechanisms (30a, 30b) for adjusting the inclination angle (θ1) of the seat surface (12c) of the seat cushion relative to the floor surface and the inclination angle of the front frame relative to the cushion frame; a motor (51) for driving the adjustment mechanism; a rotating shaft (61) that is pivotally supported by the cushion frame and rotates in response to rotation of the motor; A vehicle seat device (10) comprising: The adjustment mechanism includes: a first operating state in which the tilt angle and the inclination angle are adjusted in accordance with the rotation of the rotation shaft, and a second operating state in which the inclination angle is adjusted in accordance with the rotation of the rotation shaft without changing the tilt angle, a rotating body (31, 36) and a tilt gear (32) assembled to the rotating shaft so as to rotate together with the rotating shaft; a link (33) having one end (33a) tiltably connected to the rotating body and the other end (33c) tiltably connected to the base member, thereby changing the tilt angle in accordance with the rotation of the rotating body; a tilting body (34) that is tiltably supported on a tilting shaft portion (15a) attached to the cushion frame and that changes the tilt angle by tilting the front frame relative to the cushion frame when tilted using rotation of the tilt gear; Equipped with The tilting body is characterized by being formed with a sector gear (34a) with which the tilt gear meshes in the first operating state, and sliding contact portions (34b, 34c) with which the tips of the teeth of the tilt gear rotating in the second operating state slide. The symbols in parentheses above indicate the correspondence with the specific means described in the embodiments to be described later. [Effects of the Invention]

[0008] In this invention, an adjustment mechanism for adjusting the tilt angle of the seat cushion's seat surface relative to the floor and the tilt angle of the front frame relative to the cushion frame is configured as a mechanism controlled to one of two operating states: a first operating state in which the tilt angle and tilt angle are adjusted in response to the rotation of a rotating shaft, and a second operating state in which the tilt angle is adjusted in response to the rotation of the rotating shaft without changing the tilt angle. The adjustment mechanism includes a rotating body and a tilt gear attached to a rotating shaft that rotates in response to rotation of a motor, a link tiltably connected to the rotating body and base member to change the tilt angle in response to the rotation of the rotating body, and a tilting body that changes the tilt angle by tilting the front frame relative to the cushion frame when tilted using the rotation of the tilt gear. The tilting body is formed with a sector gear that meshes with the tilt gear in the first operating state and a sliding contact portion against which the teeth of the rotating tilt gear slide in sliding contact in the second operating state.

[0009] This allows the adjustment mechanism, which includes a rotor rotated by a single motor and a tilt gear, to realize both a height mechanism that adjusts the tilt angle of the seat cushion's seat surface and a tilt mechanism that adjusts the tilt angle, i.e., the height of the front end of the seat cushion. Even if the adjustment ranges of the tilt angle and the tilt angle differ because the operating ranges of the height mechanism and the tilt mechanism are different, the tilt angle and the tilt angle can be appropriately adjusted by switching between a first operating state that adjusts both the tilt angle and the tilt angle and a second operating state that adjusts only the tilt angle. In particular, when the sector gear and the tilt gear shift from the first operating state in which they are engaged to the second operating state in which they are disengaged, slippage occurs so that the rotating tilt gear slides against the sliding contact portion at the tip of its teeth. This allows for an adjustment mechanism in which the operating ranges of the height mechanism and the tilt mechanism differ. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a vehicle seat device according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing a state in which a front frame is removed from FIG. [Figure 3] FIG. 2 is a front view of the vehicle seat device of FIG. [Figure 4] FIG. 2 is a left side view of the vehicle seat device of FIG. [Figure 5] FIG. 2 is a right side view of the vehicle seat device of FIG. [Figure 6] FIG. 3 is an inner side view seen from the X1 direction in FIG. 2. [Figure 7] FIG. 3 is an inner side view seen from the X2 direction in FIG. 2. [Figure 8] FIG. 4 is a perspective view showing an assembled state of the components of the right adjustment mechanism. [Figure 9] 9(A) is an explanatory diagram showing an enlarged view of the right adjustment mechanism and riser of FIG. 6, and FIG. 9(B) is an explanatory diagram showing the state of FIG. 9(A) without the rotating body and link. [Figure 10]10A and 10B are explanatory diagrams illustrating the meshing and sliding relationship between the tilt gear and the sector gear and the sliding contact portion of the tilting body, where FIG. 10A shows the meshing state between the tilt gear and the sector gear, FIG. 10B shows the meshing state between the tilt gear and the sector gear rotated further in the first direction than in FIG. 10A, and FIG. 10C shows the state in which the tilt gear is in sliding contact with the sliding contact portion at its cutting edge. [Figure 11] FIG. 11(A) is an inner side view showing the state immediately after the tilt angle, which has increased from the state in FIG. 6, has reached the maximum tilt angle, and FIG. 11(B) is an inner side view showing the state when the seat angle, which has increased from the state in FIG. 11(A), has reached the maximum seat angle while the tilt angle has not changed. DETAILED DESCRIPTION OF THE INVENTION

[0011] [First embodiment] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a vehicle seat device according to the present invention will now be described with reference to the drawings. The vehicle seat device 10 according to this embodiment is a device that allows the vehicle seat 11 to move (slide) relative to the floor surface (vehicle body) in the front-rear direction and adjust the posture of the vehicle seat 11. As shown in Figures 1 to 7, the vehicle seat device 10 mainly includes the vehicle seat 11, a seat slide mechanism 20 that supports the vehicle seat 11 so that the vehicle seat 11 is slidable relative to the floor surface, a pair of left and right adjustment mechanisms (hereinafter also referred to as a right adjustment mechanism 30a and a left adjustment mechanism 30b) for adjusting the posture of the vehicle seat 11, a first motor 51, a rear adjustment mechanism 40, a second motor 52, a shaft 61, a rod 62, and a control unit and an operating unit for driving and controlling each motor.

[0012] In addition to a seat cushion and a seat back, the vehicle seat 11 includes a pair of left and right side frames (side brackets) 12a, 12b that function as cushion frames for forming the skeleton of the seat cushion, a back frame (back bracket) 13 for forming the skeleton of the seat back, and a front frame (front bracket) 14 for adjusting the height of the front end of the seat cushion.

[0013] The back frame 13 is tiltable relative to both side frames 12a, 12b and is fixedly connected to the back frame 13 at a predetermined tilt angle, thereby making it possible to adjust the tilt angle of the seat back relative to the seat cushion. As shown in Fig. 2, a shaft 61 is rotatably supported on the front sides of both side frames 12a, 12b, and a rod 62 is fixed on the rear sides of both side frames 12a, 12b. For convenience, the seat cushion and seat back are not shown in Figs. 1 to 7.

[0014] The seat slide mechanism 20 includes lower rails 22 fixed to the floor surface via front and rear feet 21, upper rails 23 assembled to the lower rails 22 so as to be slidable in the longitudinal direction thereof, a slide motor 24, a screw (not shown), etc. The seat slide mechanism 20 functions such that the upper rails 23 slide in the longitudinal direction relative to the lower rails 22 in accordance with the rotation direction of the screw caused by the slide motor 24.

[0015] Risers 25a, 25b are fixed along the longitudinal direction to the upper surfaces of the upper rails 23. The risers 25a, 25b function as base members that connect the vehicle seat 11 and the seat slide mechanism 20 via the links 33 of the right-side adjustment mechanism 30a and the left-side adjustment mechanism 30b and the links 41, 42 of the rear-side adjustment mechanism 40.

[0016] The right-side adjustment mechanism 30a and the left-side adjustment mechanism 30b have a substantially symmetrical structure and are mechanisms for adjusting the posture of the vehicle seat 11, specifically, the inclination angle of the seat surface 12c of the seat cushion relative to the floor surface (hereinafter also referred to as seat surface angle θ1) and the tilt angle of the front frame 14 relative to the side frames 12a, 12b (hereinafter also referred to as tilt angle θ2). As shown in Fig. 11 (described later), the seat surface angle θ1 corresponds to the angle between the seat surface 12c and a plane S1 along the floor surface, and the tilt angle θ2 corresponds to the angle between the seat surface 12c and a plane S2 along a reference plane of the front frame 14. Also, Figs. 4 and 6 illustrate a state where the seat surface angle θ1 is 0°, which is the minimum seat surface angle θ1min, and a state where the tilt angle θ2 is 0°, which is the minimum tilt angle θ2min.

[0017] In particular, the right-side adjustment mechanism 30a and the left-side adjustment mechanism 30b are configured as mechanisms that are controlled to one of two operating states: a first operating state in which the tilt angle θ2 and the seat angle θ1 are simultaneously adjusted in accordance with the rotation of the shaft 61, and a second operating state in which only the seat angle θ1 is adjusted in accordance with the rotation of the shaft 61 without changing the tilt angle θ2. The shaft 61 can be an example of a "rotating axis."

[0018] First, the configuration of the right adjustment mechanism 30a will be described with reference to the drawings. 2 and 6, the right-side adjustment mechanism 30a is mounted inside the side frame 12a to which the first motor 51 is mounted outside. As shown in FIGS. 8 and 9, the right-side adjustment mechanism 30a is configured to include a rotating body 31 and a tilt gear 32 mounted on a shaft 61 so that the shaft 61 serves as a rotation axis, a link 33, a tilting body 34, and a frame support part 35.

[0019] 9(A), the rotor 31 is formed so that a sector gear 31a provided on the outer edge thereof is constantly meshed with a pinion gear 51a to which rotation from the first motor 51 is transmitted at a predetermined reduction ratio. Therefore, as the rotor 31 rotates in response to the rotation of the first motor 51, the shaft 61 to which the rotor 31 is attached rotates, and the tilt gear 32 attached to the shaft 61 also rotates. That is, in response to the rotation of the first motor 51, the rotor 31 and the tilt gear 32 rotate coaxially with the shaft 61. The tilt gear 32 has a smaller reference circle diameter (pitch circle diameter) than the sector gear 31a, and is attached coaxially to the shaft 61 so as to be interposed between the rotor 31 and the side frame 12a.

[0020] As shown in FIG. 9(A), the cushion-side end 33a of the link 33 is tiltably connected by a connecting member 33b to an outer edge portion near one end of the sector gear 31a of the rotating body 31. At the rotational position where the seat angle θ1 is the minimum seat angle θ1min (the rotational position in FIGS. 4 and 9(A)), the outer edge portion is shifted forward from directly above the center of rotation of the rotating body 31. Furthermore, the floor-side end 33c of the link 33 is tiltably connected to the front side of the riser 25a by a connecting member 33d. The cushion-side end 33a can be an example of "one end," and the floor-side end 33c can be an example of "the other end."

[0021] With this connection configuration, when the rotating body 31 rotates in a first direction (counterclockwise in FIG. 9), the link 33 tilts in the seat lifting direction, and the side frame 12a tilts relative to the floor so that the seat angle θ1 increases. When the rotating body 31 rotates in a second direction (clockwise in FIG. 9), which is the opposite direction to the first direction, the link 33 tilts in the seat lowering direction, and the side frame 12a tilts relative to the floor so that the seat angle θ1 decreases. The number of teeth, etc. of the sector gear 31a are set according to the tilt range of the seat angle θ1 (minimum seat angle θ1min and maximum seat angle θ1max).

[0022] With this configuration, the rotating body 31 and the link 33 of the right adjustment mechanism 30a function to adjust the seat angle θ1 in accordance with the rotation of the shaft 61.

[0023] 9(B), the tilting body 34 is a thin plate-like member for separating the first operating state from the second operating state, and is supported so as to be tiltable in a direction perpendicular to the axial direction of the shaft 61, with the tilting shaft 15a attached to the side frame 12a as a reference. The tilting body 34 is provided with a sector gear 34a and a pair of sliding contact portions 34b, 34c on an edge portion closer to the tilt gear 32 than the tilting shaft 15a, and a connecting hole 34d is provided in a portion forward of the tilting shaft 15a (opposite the tilt gear 32 side).

[0024] The sector gear 34a has a number of teeth and other settings set according to the tilt range of the tilt angle θ2 (minimum tilt angle θ2min and maximum tilt angle θ2max), and is configured to mesh with the tilt gear 32 in the first operating state.

[0025] As shown in Figure 9(B), the pair of sliding contact portions 34b, 34c are formed at positions connected to both circumferential ends of the sector gear 34a so that the tips of the teeth of the tilt gear 32 rotating in the second operating state come into sliding contact (contact).

[0026] With this configuration, in a first operating state in which the sector gear 34a and the tilt gear 32 are engaged, the tilting body 34 tilts around the tilting shaft 15a in response to the rotation of the tilting gear 32. When the tilting gear 32, which has been rotating in the first direction, comes out of engagement with the sector gear 34a and comes into contact with the sliding contact portion 34b at the cutting edge, slippage occurs, as described below, and the tilting body 34 enters a state in which it does not tilt (a second operating state). Also, when the tilting gear 32, which has been rotating in the second direction, comes out of engagement with the sector gear 34a and comes into contact with the sliding contact portion 34c at the cutting edge, slippage occurs, as described below, and the tilting body 34 enters a state in which it does not tilt (a second operating state).

[0027] As shown in Figure 9(B), the connecting hole 34d is formed in an elongated hole shape, and a connecting member 35b assembled to the support piece 35a of the frame support portion 35 is connected to the connecting hole 34d so as to be able to move relatively along the long axis direction of the elongated hole.

[0028] The frame support portion 35 is a member for pushing up the front frame 14 from below so as to tilt it relative to the side frame 12a. The frame support portion 35 is connected to the middle portion of the side frame 12a so as to be tiltable about the tilting shaft portion 35c.

[0029] Therefore, the frame support part 35 and the front frame 14 tilt relative to the side frame 12a so that the support piece 35a moves up and down in response to the tilt of the tilting body 34, thereby changing the tilt angle θ2. Specifically, when the tilt gear 32 rotates in the first direction, the tilting body 34 tilts in the seat-lifting direction, and the frame support part 35 and the front frame 14 tilt relative to the side frame 12a so that the tilt angle θ2 increases. When the tilt gear 32 rotates in the second direction, the tilting body 34 tilts in the seat-lowering direction, and the frame support part 35 and the front frame 14 tilt relative to the side frame 12a so that the tilt angle θ2 decreases. Because the tilting center of the tilting body 34 and the tilting center of the front frame 14 (frame support part 35) are different, the connecting hole 34d is formed in an elongated hole shape so that it can absorb any relative positional deviation during tilting.

[0030] With this configuration, the tilt gear 32 and the tilting body 34 of the right adjustment mechanism 30a function to adjust the tilt angle θ2 in accordance with the rotation of the shaft 61.

[0031] 7, the left-side adjustment mechanism 30b has a structure that is substantially symmetrical to the right-side adjustment mechanism 30a, and is configured to include a rotating body 36 that is attached to the shaft 61 so that the shaft 61 serves as a rotation axis, and the tilt gear 32, link 33, and tilting body 34 described above. Unlike the rotating body 31, the rotating body 36 does not have a sector gear 31a, and the cushion-side end 33a of the link 33 is connected to the rotating body 31 at the same position as the rotating body 31 by a connecting member 33b so as to be tiltable.

[0032] In the left-side adjustment mechanism 30b configured in this manner, similar to the right-side adjustment mechanism 30a, the rotating body 36 and link 33 function to adjust the seat angle θ1 in accordance with the rotation of the shaft 61, and the tilt gear 32 and tilting body 34 function to adjust the tilt angle θ2 in accordance with the rotation of the shaft 61.

[0033] The rear adjustment mechanism 40 includes links 41, 42 tiltably connected to the rear sides of the risers 25a, 25b and the rod 62, and functions to adjust the height from the floor of the vehicle seat 11 by tilting the links 41, 42 in response to the rotation of a second motor 52 attached to the side frame 12b. When the first motor 51 rotates without the second motor 52 rotating, the links 41, 42 do not tilt relative to the side frames 12a, 12b, but tilt relative to the risers 25a, 25b.

[0034] Next, adjustment of the seating angle θ1 of the seating surface 12c of the seat cushion relative to the floor surface and adjustment of the tilting angle θ2 of the front frame 14 relative to the side frames 12a, 12b will be described with reference to the drawings, taking the operation of the right adjustment mechanism 30a as an example.

[0035] 6 (a state in which the seat cushion angle θ1 is the minimum seat cushion angle θ1min and the tilt angle θ2 is the minimum tilt angle θ2min), when an occupant operates the operating unit to increase the seat angle θ1 and the tilt angle θ2, the rotation transmitted from the first motor 51 via the pinion gear 51a causes the rotating body 31 and the tilt gear 32 to rotate in the first direction together with the shaft 61. As a result, the tilting body 34 meshed with the tilt gear 32 by the sector gear 34a and the link 33 connected to the rotating body 31 each begin to tilt in the seat lifting direction, and the posture of the vehicle seat 11 begins to change so that the seat angle θ1 and the tilt angle θ2 each gradually increase.

[0036] As the rotation in the first direction continues, the tilting body 34 tilts in the seat lifting direction, passing through Figures 10(A) and 10(B), thereby entering a first operating state in which the tilting angle θ2 is adjusted to become even larger together with the seat angle θ1.

[0037] Then, when the tilt angle θ2 reaches the maximum tilt angle θ2max, as shown in FIG. 10(C), the rotating tilt gear 32 disengages from the sector gear 34a and its cutting edge slides against the sliding contact portion 34b (rotates while in contact with it). In this sliding contact state, the force acting on the tilting body 34, such as its own weight acting via the support piece 35a of the frame support portion 35, becomes greater than the frictional force acting via the cutting edge of the tilt gear 32. Therefore, even if the tilt gear 32 rotates, a sliding state occurs in which the cutting edge of the tilt gear 32 slides against the sliding contact portion 34b, and the tilting body 34 does not tilt, i.e., the tilt angle θ2 does not change. Note that immediately after the sliding occurs, as shown in FIG. 11(A), the tilt angle θ2 reaches the maximum tilt angle θ2max, while the seat angle θ1 has not yet reached the maximum seat angle θ1max.

[0038] Meanwhile, the seat angle θ1 changes to become even larger as the link 33 continues to tilt in the seat lifting direction in response to the rotation of the rotating body 31. In other words, the occurrence of the slippage described above causes the second operating state to be entered, in which only the seat angle θ1 is adjusted in response to the rotation of the shaft 61 without adjusting the tilt angle θ2, and in the state shown in Figure 11(B), the seat angle θ1 becomes the maximum seat angle θ1max.

[0039] Thereafter, when the occupant operates the operating unit to decrease the seat angle θ1 and the tilt angle θ2, the rotation transmitted from the first motor 51 via the pinion gear 51a causes the rotating body 31 and the tilt gear 32 to rotate together with the shaft 61 in the second direction. As a result, the link 33 connected to the rotating body 31 begins to tilt in the seat downward direction, and the tilt gear 32, which had been in a slipping state, meshes with the sector gear 34a again, causing the tilting body 34 to begin tilting in the seat downward direction. This results in a first operating state in which the seat angle θ1 and the tilt angle θ2 are adjusted to gradually decrease.

[0040] Then, when the tilt angle θ2 reaches the minimum tilt angle θ2min, the rotating tilt gear 32 ceases to mesh with the sector gear 34a and enters a state in which the cutting edge thereof slides against the sliding contact portion 34c (rotates while in contact with it). Therefore, even if the tilt gear 32 rotates, a sliding state occurs in which the cutting edge of the tilt gear 32 slides against the sliding contact portion 34c, and the tilt angle θ2 does not change (the tilting body 34 does not tilt).

[0041] Meanwhile, the seat angle θ1 changes to become even smaller as the link 33 continues to tilt in the seat downward direction in response to the rotation of the rotating body 31. In other words, the occurrence of the above-mentioned slippage state results in a second operating state in which only the seat angle θ1 is adjusted in response to the rotation of the shaft 61 without adjusting the tilt angle θ2.

[0042] As described above, in the vehicle seat device 10 according to this embodiment, the right-side adjustment mechanism 30a and the left-side adjustment mechanism 30b for adjusting the seat angle θ1 of the seat surface 12c of the seat cushion relative to the floor surface and the tilt angle θ2 of the front frame 14 relative to the side frames 12a, 12b are configured as mechanisms that are controlled to one of two operating states: a first operating state in which the tilt angle θ2 and the seat angle θ1 are adjusted in accordance with the rotation of the shaft 61, and a second operating state in which the seat angle θ1 is adjusted in accordance with the rotation of the shaft 61 without changing the tilt angle θ2. The right-side adjustment mechanism 30a includes a rotating body 31 and a tilt gear 32 attached to a shaft 61 that rotates in response to the rotation of the first motor 51, a link 33 tiltably connected to the rotating body 31 and the riser 25a to change the seat angle θ1 in response to the rotation of the rotating body 31, and a tilting body 34 that changes the tilt angle θ2 by tilting the front frame 14 relative to the side frame 12a when tilting using the rotation of the tilt gear 32. The left-side adjustment mechanism 30b includes a rotating body 36 and a tilt gear 32 attached to a shaft 61 that rotates in response to the rotation of the first motor 51, the link 33 tiltably connected to the rotating body 36 and the riser 25b to change the seat angle θ1 in response to the rotation of the rotating body 36, and the tilting body 34 that changes the tilt angle θ2 by tilting the front frame 14 relative to the side frame 12b when tilting using the rotation of the tilt gear 32. The tilting body 34 is formed with a sector gear 34a that meshes with the tilt gear 32 in the first operating state, and a pair of sliding contact portions 34b, 34c against which the tips of the teeth of the rotating tilt gear 32 slide in the second operating state.

[0043] As a result, a height mechanism that adjusts the seat angle θ1 of the seat cushion 12c of the seat cushion and a tilt mechanism that adjusts the tilt angle θ2, i.e., the height of the front end of the seat cushion, can be realized by the right adjustment mechanism 30a that has the rotating body 31 and tilt gear 32 rotated by one first motor 51 and the left adjustment mechanism 30b that has the rotating body 36 and tilt gear 32 rotated by the same first motor 51. Even if the adjustment range of the tilt angle θ2 differs from the adjustment range of the seat angle θ1 because the operation range of the height mechanism and the operation range of the tilt mechanism are different, the tilt angle θ2 and the seat angle θ1 can each be suitably adjusted by the first operation state that adjusts both the tilt angle θ2 and the seat angle θ1 and the second operation state that adjusts only the seat angle θ1. In particular, when the sector gear 34a and tilt gear 32 transition from a first operating state in which they are engaged to a second operating state in which they are disengaged, slippage occurs such that the tip of the rotating tilt gear 32 slides against one of the sliding contact portions 34b, 34c, making it possible to realize an adjustment mechanism in which the operating range of the height mechanism and the operating range of the tilt mechanism are different.

[0044] [Other embodiments] The present invention is not limited to the above-described embodiments, and may be embodied as follows, for example. (1) The right-side adjustment mechanism 30a is not limited to a configuration in which the sector gear 31a of the rotating body 31 is constantly engaged with the pinion gear 51a, causing the rotating body 31 to rotate coaxially with the shaft 61. Alternatively, the sector gear 31a of the rotating body 31 may be eliminated and a gear or the like separately provided on the shaft 61 may be constantly engaged with the pinion gear 51a, causing the rotating body 31 to rotate coaxially with the shaft 61.

[0045] (2) By assembling the first motor 51 to the side frame 12b, the left-side adjustment mechanism 30b may be configured to have a rotating body 31 instead of the rotating body 36, and the right-side adjustment mechanism 30a may be configured to have a rotating body 36 instead of the rotating body 31. [Explanation of symbols]

[0046] 10 Vehicle seat device 11 Vehicle seats 12a, 12b Side frame (cushion frame) 12c seat 14 Front frame 15a Tilting shaft part 25a, 25b Riser (base member) 30a Right side adjustment mechanism 30b Left side adjustment mechanism 31,36 Rotating body 32 Tilt gear 33 Links 33a Cushion side end (one end) 33c Floor side end (other end) 34 Tilting body 34a sector gear 34b,34c Sliding contact part 51 First motor (motor) 61 Shaft (rotating axis) θ1 Seat angle (inclination angle) θ2 Tilt angle

Claims

[Claim 1] a cushion frame for forming a skeleton of the seat cushion; a front frame tiltably mounted to the front side of the cushion frame for adjusting the height of a front end of the seat cushion in accordance with a tilt angle relative to the cushion frame; a base member disposed on a floor surface below the cushion frame; a pair of left and right adjustment mechanisms for adjusting the inclination angle of the seat surface of the seat cushion relative to the floor surface and the inclination angle of the front frame relative to the cushion frame; a motor for driving the adjustment mechanism; a rotating shaft that is pivotally supported by the cushion frame and rotates in response to rotation of the motor; A vehicle seat device comprising: The adjustment mechanism includes: a first operating state in which the tilt angle and the inclination angle are adjusted in accordance with the rotation of the rotation shaft, and a second operating state in which the inclination angle is adjusted in accordance with the rotation of the rotation shaft without changing the tilt angle, a rotating body and a tilt gear assembled to the rotating shaft so as to rotate together with the rotating shaft; a link having one end tiltably connected to the rotating body and the other end tiltably connected to the base member, thereby changing the tilt angle in accordance with rotation of the rotating body; a tilting body that is tiltably supported on a tilting shaft portion assembled to the cushion frame, and that changes the tilt angle by tilting the front frame relative to the cushion frame when tilting using rotation of the tilt gear; Equipped with The tilting body is formed with a sector gear with which the tilt gear meshes in the first operating state, and a sliding contact portion with which the tip of the tilt gear rotating in the second operating state slides.

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