Seat device for vehicle

Abstract

To provide a configuration which is capable of restraining a bracket from being deformed without requiring enlargement of bracket by which a motor shaft is pivotally supported and increase of the number of weld even if adopting adjustment mechanism which utilizes a sector gear and a link.SOLUTION: A right side adjustment mechanism 30a comprises a turning body 31 that is fixed to a shaft 61 and provided with a sector gear 31a which engages with a pinion gear 51b of a motor shaft 51a being provided, a restriction part 32 which restricts turning range of the turning body 31, a link 33 which changes inclination angle θ according to rotation of the pinion gear 51b and a bracket 34 which is welded and fixed at two points of a first welding position P1 which is welding position with a side frame 12a and a second welding position P2 which is welding position with the restriction part 32. A bearing part 35a which pivotally supports the motor shaft 51a and perforation hole 35b through which a shaft 61 penetrates via prescribed gap G are formed on the bracket 34. The first welding position P1 is position where the perforation hole 35b is farther from the bearing part 35a.SELECTED DRAWING: Figure 7

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] In addition to the height of the vehicle seat, the adjustable position of the vehicle seat also includes the tilt angle of the seat cushion, and vehicle seat devices that employ an adjustment mechanism for adjusting the tilt angle of the seat cushion are known. In particular, to make the vehicle seat in a relaxed position for the occupant, the tilt angle of the seat cushion needs to be increased, and the tilt angle of the seat cushion can be increased by employing an adjustment mechanism that uses a sector gear rotated by a motor or the like and a link connected to this sector gear.

[0006] In this type of adjustment mechanism, a bracket that supports the motor shaft at a bearing portion is welded to the cushion frame while the pinion gear and sector gear provided on the motor shaft are in mesh with each other. Because a force acts on the bearing portion of the bracket that supports the rotating motor shaft, trying to separate the pinion gear and sector gear, the bracket must be fixed to the cushion frame in a way that prevents the bracket from deforming due to this force.

[0007] To prevent the bracket from deforming even when the above-mentioned forces are applied, the number of welding points of the bracket to the cushion frame can be increased, but this increases manufacturing costs. In particular, in an adjustment mechanism that uses a sector gear and a link, if welding points are provided to avoid the movable area of ​​the sector gear and the link, the bracket becomes unnecessarily large, making it difficult to reduce the size and weight of the seat device.

[0008] The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a configuration that can suppress deformation of the bracket on which the motor shaft is supported, without requiring an increase in the size of the bracket or the number of welds, even when an adjustment mechanism using a sector gear and a link is adopted. [Means for solving the problem]

[0009] 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 base member (25a, 25b) disposed on a floor surface below the cushion frame; an adjustment mechanism (30a) for adjusting the inclination angle (θ) of the seat surface (12c) of the seat cushion relative to the floor surface; a motor (51) having a motor shaft (51a) provided with a pinion gear (51b) 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 rotary body (31) provided with a sector gear (31a) meshing with the pinion gear and fixed to the rotary shaft; a limiting portion (32) that is fixed to the cushion frame so as to pass through an arc-shaped slot (31b) formed in the rotating body, thereby limiting the rotation range of the rotating body; 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 pinion gear; a bracket (34) that is welded and fixed at two points, a first welding position (P1) that is a welding position to the cushion frame and a second welding position (P2) that is a welding position to the limiting portion, with the pinion gear and the rotating body interposed between the bracket (34) and the cushion frame; Equipped with The bracket is formed with a bearing portion (35a) that supports the motor shaft and a through hole (35b) through which the rotating shaft passes via a predetermined gap (G), The first welding position is characterized in that the through hole is located farther from the bearing portion. The symbols in parentheses above indicate the correspondence with the specific means described in the embodiments to be described later. [Effects of the Invention]

[0010] In the present invention, an adjustment mechanism for adjusting the tilt angle of a seat cushion includes a rotating body that is provided with a sector gear that meshes with a pinion gear of a motor shaft and is fixed to a rotating shaft, a limiting part that is fixed to a cushion frame so as to pass through an arc-shaped elongated hole formed in the rotating body and that limits the rotation range of the rotating body, a link that has one end tiltably connected to the rotating body and the other end tiltably connected to a base member and that changes the tilt angle according to the rotation of the pinion gear, and a bracket that is welded to the cushion frame at two points, a first welding position where the pinion gear and the rotating body are interposed between the bracket and the cushion frame and a through hole through which the rotating shaft passes with a predetermined gap formed in the bracket, and the first welding position is a position where the through hole is farther from the bearing part.

[0011] As a result, the bracket that supports the motor shaft at the bearing portion is welded and fixed to the cushion frame and the limiting portion at the first welding position and the second welding position with the rotating shaft passing through the through hole with a predetermined gap. Therefore, even if the bracket tries to deform due to an increase in force that tries to separate the pinion gear and the sector gear, the rotating shaft comes into contact with the inner edge of the through hole, so deformation of the bracket can be suppressed. Therefore, even when an adjustment mechanism that uses the sector gear and the link is adopted, it is possible to achieve a vehicle seat device that can suppress deformation of the bracket without requiring an increase in the size of the bracket that supports the motor shaft or an increase in the number of welds.

[0012] The bracket may include a main body portion positioned along the cushion frame and a base portion extending from the main body portion toward the cushion frame, the first welding position being a welding position between the base portion and the cushion frame, the second welding position being a welding position between the main body portion and the limiting portion, and the bearing portion and the through hole being formed in the main body portion. This allows the through hole to be positioned away from the first welding position without requiring an increase in the size of the bracket, thereby improving the effect of suppressing deformation of the bracket due to contact of the rotation shaft with the inner edge of the through hole.

[0013] The second welding position may be a position where the bearing is farther away from the through hole. This allows the first welding position and the second welding position to be located in opposite directions relative to the bearing, making it possible to more effectively suppress deformation of the bracket due to the force that moves the pinion gear and the sector gear apart. [Brief explanation of the drawings]

[0014] [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. 3 is an inner side view seen from the X1 direction in FIG. 2. [Figure 6] FIG. 3 is an inner side view seen from the X2 direction in FIG. 2. [Figure 7] 7(A) is an explanatory diagram showing an enlarged view of the vicinity of the right adjustment mechanism in FIG. 5, and FIG. 7(B) is an explanatory diagram showing a state in which the bracket is removed from FIG. 7(A). [Figure 8] FIG. 8 is a cross-sectional view showing a cross section corresponding to X3-X3 in FIG. 7(A). [Figure 9] FIG. 9(A) is an explanatory diagram showing the tilted state of the link when the tilt angle is set to the largest, and FIG. 9(B) is an explanatory diagram showing the state of FIG. 9(A) with the bracket removed. [Figure 10] FIG. 10(A) is an explanatory diagram showing the tilted state of the link when the tilt angle is set to the smallest, and FIG. 10(B) is an explanatory diagram showing the state of FIG. 10(A) with the bracket removed. [Figure 11] 7 is an explanatory diagram showing an enlarged view of the rear adjustment mechanism and its vicinity in FIG. 6. [Figure 12] 10 is an explanatory diagram illustrating the direction of deformation of the bracket due to the force acting when the pinion gear rotates, and the deformation suppression effect of the shaft inserted through the through hole. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] [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 6, 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 pipe-shaped shaft (hereinafter also simply referred to as a shaft 61) and a rod 62, and a control unit and an operating unit for driving and controlling the respective motors.

[0016] 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, a front frame (front bracket) 14, and the like.

[0017] The back frame 13 is tiltable relative to both side frames 12a, 12b and is fixedly connected to them 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 supported 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 6.

[0018] 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.

[0019] 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.

[0020] The right-side adjustment mechanism 30a, the left-side adjustment mechanism 30b and the shaft 61, etc. function to adjust the posture of the vehicle seat 11, specifically, the inclination angle θ of the seat surface 12c of the seat cushion relative to the floor surface (see Figures 9 and 10 described below).

[0021] First, the configuration of the right adjustment mechanism 30a will be described with reference to the drawings. 2 and 5, 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. 7 and 8, the right-side adjustment mechanism 30a is configured to include a rotating body 31 fixed to the shaft 61 so that the shaft 61 serves as a rotation axis, a limiting part 32 that limits the rotation range of the rotating body 31, a link 33, and a bracket 34.

[0022] 7(B), a sector gear 31a is formed on part of the outer edge of the rotating body 31, and an arc-shaped elongated hole 31b is formed in a portion away from the sector gear 31a. The sector gear 31a of the rotating body 31 is constantly engaged with a pinion gear 51b provided on a motor shaft 51a of the first motor 51. Therefore, when the rotating body 31 rotates in response to the rotation of the first motor 51, the shaft 61 to which the rotating body 31 is fixed rotates coaxially.

[0023] The limiting portion 32 is fixed to the side frame 12a so as to pass through the long hole 31b of the rotating body 31. The limiting portion 32 functions to limit the rotation range of the rotating body 31 by coming into contact with the edge of the long hole 31b in the rotation direction when the rotating body 31 rotates.

[0024] 7(B), the cushion-side end 33a of the link 33 is tiltably connected by a connecting member 33b to an outer edge portion between the sector gear 31a and the elongated hole 31b of the rotating body 31. 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."

[0025] The bracket 34 is a metal member that supports the motor shaft 51a and suppresses axial tilt of the rotating body 31. As shown in Fig. 8, the bracket 34 includes a main body 35 that is positioned along the side frame 12a, and a base 36 that extends from the main body 35 at an angle toward the side frame 12a.

[0026] The main body 35 is formed with a bearing 35a for supporting the motor shaft 51a, a through hole 35b through which the shaft 61 passes, and a protrusion 35c located between the bearing 35a and the through hole 35b and protruding toward the rotating body 31. The main body 35 is formed so that there is little misalignment between the bearing 35a and the through hole 35b in the axial direction of the motor shaft 51a (the up-down direction in FIG. 8). Note that this embodiment is not limited to forming the bearing 35a and the through hole 35b so that there is a slight misalignment between them in the axial direction, and the bearing 35a and the through hole 35b may be formed so that they are positioned on the same plane without any misalignment in the axial direction.

[0027] Bracket 34 is welded to side frame 12a and restricting portion 32 in a state in which motor shaft 51a is supported by bearing portion 35a and shaft 61 passes through through hole 35b with a predetermined gap G therebetween (see FIG. 8). In this embodiment, predetermined gap G is set to about 1 / 2 the thickness of bracket 34, but is not limited to this, and may be set to about the thickness of bracket 34 or about 1 / 4 the thickness of bracket 34, for example.

[0028] Specifically, the bracket 34 is welded and fixed at two points: a first welding position P1, which is the welding position between the base 36 and the side frame 12a, and a second welding position P2, which is the welding position between the main body 35 and the limiting portion 32, with the pinion gear 51b and the rotating body 31 interposed between the bracket 34 and the side frame 12a.

[0029] 7(A), first welding position P1 is close to a line connecting the center of bearing portion 35a (the center of motor shaft 51a) and the center of through hole 35b (the center of shaft 61), and is located farther from through hole 35b than bearing portion 35a. In addition, second welding position P2 is located farther from bearing portion 35a than through hole 35b, so that the second welding position P2 is located in the opposite direction from first welding position P1 with respect to bearing portion 35a.

[0030] The bracket 34, which is fixed by welding as described above, functions to suppress tilt of the rotating body 31 in the axial direction by arranging the protrusion 35c opposite the rotating body 31 with a small gap therebetween, as shown in FIG.

[0031] 6, the left-side adjustment mechanism 30b is configured to include a rotating body 37 that is assembled to the shaft 61 so that the shaft 61 serves as a rotation axis, and the above-mentioned link 33. Unlike the rotating body 31, the rotating body 37 is not provided with a sector gear 31a, and a cushion-side end 33a of the link 33 is tiltably connected by a connecting member 33b at the same position as the rotating body 31. The link 33 of the left-side adjustment mechanism 30b is tiltably connected by a connecting member 33d to the front side of the riser 25b at a floor-side end 33c.

[0032] In the right-side adjustment mechanism 30a and the left-side adjustment mechanism 30b configured in this manner, the rotating body 31 on which the sector gear 31a is formed and the rotating body 37 rotate coaxially together with the shaft 61 in response to the rotation of the first motor 51, thereby tilting the link 33 so as to change the inclination angle θ of the seat surface 12c. In this way, by employing an adjustment mechanism that utilizes the sector gear 31a rotated by the first motor 51 and the link 33 connected to this sector gear 31a, the inclination angle θ of the seat surface 12c can be made larger.

[0033] 9(A) and 9(B), when the rotating body 31 rotates so that an edge portion of the elongated hole 31b on one side in the rotation direction, which is near the connecting member 33b, comes into contact with the restricting portion 32, the tilt angle θ becomes the largest. When the tilt angle θ is made the largest in this way, the connecting position between the rotating body 31 and the link 33 (the position of the connecting member 33b) becomes a position forward of the rotation center of the rotating body 31, the link 33 becomes in the tilted state shown in FIGS. 9(A) and 9(B), and the rotating body 31 becomes the rotated state shown in FIG. 9(B).

[0034] 10(A) and 10(B), when the rotating body 31 rotates so that the edge on the other side of the rotation direction of the elongated hole 31b comes into contact with the restricting portion 32, the tilt angle θ becomes smallest. When the tilt angle θ is made smallest in this way, the connection position between the rotating body 31 and the link 33 becomes a position shifted rearward from directly above the rotation center of the rotating body 31, the link 33 becomes inclined as shown in FIGS. 10(A) and 10(B), and the rotating body 31 becomes rotated as shown in FIG. 10(B).

[0035] 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.

[0036] 11, in this embodiment, a sector gear 42a that is constantly meshed with a pinion gear (not shown) provided on a motor shaft 52a of the second motor 52 is formed on the link 42 connected to the riser 25b. As a result, the link 42 tilts about the rod 62 as an axis in response to the rotation of the second motor 52, and the tilting range (rotation range about the rod 62) is limited by a limiting portion 43 that is fixed to the side frame 12b so as to pass through an elongated hole 42b of the link 42.

[0037] The bracket 44, which supports the motor shaft 52a at a bearing portion 44a, is welded and fixed to the side frame 12b at two welding positions P3 and P4, and is welded and fixed to the limiting portion 43 at a welding position P5.

[0038] Since the tilt angle range of link 42 (the rotation angle range around rod 62) is narrower than the rotation angle range of rotating body 31, there is a relatively high degree of freedom in terms of the welding and fixing position of bracket 44. For this reason, bracket 44 is formed so as to avoid rod 62, and is welded and fixed at the three welding points P3, P4, and P5 described above.

[0039] In contrast, the bracket 34, which is one of the characteristic configurations of this embodiment, has a relatively wide rotation angle range of the rotating body 31, and is therefore welded and fixed to the side frame 12a and the limiting portion 32 at two points, the first welding position P1 and the second welding position P2, with the shaft 61 passing through the through hole 35b via a predetermined gap G.

[0040] In the vehicle seat device 10 configured as described above, as shown in FIG. 12 , when the pinion gear 51b rotates, a force is generated in the bracket 34 in the direction of arrow F1, which moves the pinion gear 51b away from the sector gear 31a. Because the bracket 34 is fixed by two-point welding rather than three-point welding, when the generated force increases as described above, the bearing portion 35a tends to move toward the first welding position P1, causing the bracket 34 to deform and tilt in the direction of arrow F2. During this deformation, the shaft 61 comes into contact with the inner edge of the through hole 35b, thereby suppressing the deformation of the bracket 34. In other words, even when the bracket 34 is fixed by welding at two points, the shaft 61 inserted through the through hole 35b can suppress deformation of the bracket 34.

[0041] As described above, in the vehicle seat device 10 according to this embodiment, the right-side adjustment mechanism 30a for adjusting the tilt angle θ of the seat surface 12c of the seat cushion includes the rotating body 31 provided with the sector gear 31a meshing with the pinion gear 51b of the motor shaft 51a and fixed to the shaft 61, the limiting portion 32 fixed to the side frame 12a so as to pass through the arc-shaped elongated hole 31b formed in the rotating body 31, thereby limiting the rotation range of the rotating body 31, and the cushion-side end The link 33 has a portion 33a tiltably connected to the rotating body 31 and a floor-side end portion 33c tiltably connected to the riser 25a, thereby changing the tilt angle θ in accordance with the rotation of the pinion gear 51b, and a bracket 34 welded and fixed at two points, a first welding position P1 where the bracket is welded to the side frame 12a and a second welding position P2 where the bracket is welded to the limiting portion 32, with the pinion gear 51b and the rotating body 31 interposed between the bracket 34 and the side frame 12a. The bracket 34 has a bearing portion 35a that pivotally supports the motor shaft 51a and a through hole 35b through which the shaft 61 passes via a predetermined gap G, and the first welding position P1 is a position where the through hole 35b is farther from the bearing portion 35a.

[0042] As a result, the bracket 34, which supports the motor shaft 51a at the bearing portion 35a, is welded and fixed to the side frame 12a and the limiting portion 32 at the first welding position P1 and the second welding position P2, with the shaft 61 passing through the through hole 35b with a predetermined gap G between them. Therefore, even if the bracket 34 attempts to deform due to an increased force causing the pinion gear 51b and the sector gear 31a to separate, the shaft 61 comes into contact with the inner edge of the through hole 35b, thereby suppressing deformation of the bracket 34. Therefore, even when the right adjustment mechanism 30a and the left adjustment mechanism 30b, which use the sector gear 31a and the link 33 to increase the inclination angle θ of the seat surface 12c, are adopted, it is possible to realize a vehicle seat apparatus 10 that can suppress deformation of the bracket 34 without increasing the size of the bracket 34 on which the motor shaft 51a is supported or without increasing the number of welds.

[0043] Furthermore, the bracket 34 includes a main body portion 35 positioned along the side frame 12a and a base portion 36 extending from the main body portion 35 at an angle toward the side frame 12a, the first welding position P1 being the welding position between the base portion 36 and the side frame 12a, the second welding position P2 being the welding position between the main body portion 35 and the limiting portion 32, and the bearing portion 35a and the through hole 35b being formed in the main body portion 35. This allows the position of the through hole 35b to be separated from the first welding position P1 without requiring an increase in the size of the bracket 34, thereby improving the effect of suppressing deformation of the bracket 34 caused by the shaft 61 coming into contact with the inner edge of the through hole 35b.

[0044] In particular, the second welding position P2 is set at a position where the bearing portion 35a is farther away from the through hole 35b. This allows the first welding position P1 and the second welding position P2 to be located in opposite directions relative to the bearing portion 35a, making it possible to more effectively suppress deformation of the bracket 34 against the force F that tends to separate the pinion gear 51b and the sector gear 31a.

[0045] [Other embodiments] The present invention is not limited to the above-described embodiments, and may be embodied as follows, for example. (1) The vehicle seat device 10 is not limited to being configured so that the first motor 51 and the right-side adjustment mechanism 30a are assembled to the side frame 12a and the left-side adjustment mechanism 30b is assembled to the side frame 12b, but may also be configured so that the left-side adjustment mechanism 30b is assembled to the side frame 12a and the first motor 51 and the right-side adjustment mechanism 30a are assembled to the side frame 12b. [Explanation of symbols]

[0046] 10 Vehicle seat device 11 Vehicle seats 12a, 12b Side frame (cushion frame) 12c seat 25a, 25b Riser (base member) 30a Right side adjustment mechanism 30b Left side adjustment mechanism 31,37 Rotating body 31a sector gear 31b long hole 32 Restricted Section 33 Links 33a Cushion side end (one end) 33c Floor side end (other end) 34 Bracket 35 Main body 35a Bearing section 35b Through hole 36 Base 51 First motor (motor) 51a Motor shaft 51b Pinion gear 61 Shaft (rotating axis) G specified gap θ Tilt angle

Claims

1. a cushion frame for forming a skeleton of the seat cushion; a base member disposed on a floor surface below the cushion frame; an adjustment mechanism for adjusting the inclination angle of the seat surface of the seat cushion with respect to the floor surface; a motor having a pinion gear provided on a motor shaft 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 rotary body provided with a sector gear that meshes with the pinion gear and fixed to the rotary shaft; a limiting portion that is fixed to the cushion frame so as to pass through an arc-shaped elongated hole formed in the rotating body, thereby limiting the rotation range of the rotating body; 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 pinion gear; a bracket that is welded and fixed to the cushion frame at two points, a first welding position that is a welding position to the cushion frame and a second welding position that is a welding position to the limiting portion, with the pinion gear and the rotating body interposed between the bracket and the cushion frame; Equipped with The bracket is formed with a bearing portion that supports the motor shaft and a through hole through which the rotating shaft passes with a predetermined gap therebetween, The vehicle seat apparatus according to claim 1, wherein the first welding position is a position where the through hole is farther from the bearing portion.

2. The bracket includes a main body portion positioned along the cushion frame and a base portion extending from the main body portion toward the cushion frame, the first welding position is a welding position between the base portion and the cushion frame, and the second welding position is a welding position between the main body portion and the limiting portion, The vehicle seat device according to claim 1, wherein the bearing portion and the through hole are formed in the main body portion.

3. The vehicle seat apparatus according to claim 1, wherein the second welding position is a position where the bearing portion is farther from the through hole.

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