Vehicle seat device

Abstract

To provide a vehicle seat device, in which a rotation support that rotates integrally with a seat body is rotatably supported by a base body via a bearing, and which can enhance a rattling suppression effect with respect to the base body of the rotation support, by the arrangement of a rattling suppression member capable of suppressing rattling of the rotation support by closely contacting a portion between the rotation support and the base body, where the portion making contact action with the rotation support and the base body can be separated away from the rotation center of the rotation support. and further by the arrangement of the rattling suppression member immediately below a load input portion to the rotation support from a seat body maintained even when the seat body receives an unbalanced load due to such a situation that an occupant leans forward / backward or to the left / right while seated on the vehicle seat device.SOLUTION: A rattling suppression member 70 is arranged on an outer side in a radial direction with respect to a bearing 45, and at least a portion of the rattling suppression member 70 is arranged at a position overlapping a coupling portion 31 between a seat body S and a rotation support 30 in the plan view.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a seat device, and more particularly to a vehicle seat device comprising: a base body that can be fixed to the floor portion of a vehicle body; a rotating support that is connected to the seat body so as to rotate integrally with the seat body and supports the seat body; a bearing that rotatably supports the rotating support on the base body around a vertical axis; a locking mechanism that is provided between the base body and the rotating support and can selectively lock the rotating support to one of a plurality of rotational positions; a rattle-suppressing member that comes into close contact with the base body and the rotating support when the rotational position of the rotating support is locked by the locking mechanism, thereby suppressing rattle of the rotating support; and an interlocking member that interlocks the rattle-suppressing member with the locking mechanism so that the rattle-suppressing member releases the contact state in response to the locking mechanism unlocking the rotational position of the rotating support.

[0002] In this invention and this specification, "radial direction" refers to the radial direction of an imaginary circle whose central axis is the rotation axis of the rotating support (and therefore the seat body), and "circumferential direction" refers to the circumferential direction of the imaginary circle. [Background technology]

[0003] In the above-mentioned vehicle seat device, a rattle suppression member is disposed at approximately the same radial position or at an inner position relative to a bearing that supports a rotary support body on a base body, as described in Patent Documents 1 and 2, for example. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-160556 [Patent Document 2] International Publication No. 2020-110984 Summary of the Invention [Problem to be solved by the invention]

[0005] The rattle suppressing member, when the rotational position of the rotating support is locked, comes into close contact with the base body and the rotating support to suppress rattle of the rotating support, but the further the contact point of the rattle suppressing member with the rotating support / base body is from the center of rotation of the rotating support, the stronger the suppression effect is due to the lever ratio. However, with structures such as those in the conventional devices of Patent Documents 1 and 2, in which the rattle suppressing member is positioned at approximately the same position or inward (i.e., radially inward) in relation to the bearing, a sufficient rattle suppression effect could not be expected.

[0006] Therefore, in order to enhance the rattle suppression effect, it is conceivable to position the rattle suppression member radially outward from the bearing, but this positioning alone is not sufficient to suppress rattle.In other words, the inventors have discovered that rattle suppression measures should be taken that take into consideration changes in the load distribution that the rotating support receives from the seat body as the weight of the occupant sitting in the seat shifts forward, backward, and side to side.

[0007] For example, if the seat body is subjected to an unbalanced load due to an occupant leaning forward / backward or left / right while seated, a force that causes the rotating supports on the outer side of the bearings to sink downward will be applied directly below the seat body portion where the load distribution is high (i.e., directly below the point where the load is input from the seat body to the rotating supports), while a force that causes the rotating supports on the outer side of the bearings to float upward and separate from the base body will be applied directly below the seat body portion where the load distribution is low (i.e., directly below the above-mentioned load input point).The application of such unbalanced forces will cause the rotating supports to rattle.

[0008] The present invention has been proposed in view of the above, and has as its object to provide a vehicle seat device that can solve the above problems of conventional devices with a simple structure. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides a vehicle seat device comprising: a base body that is fixed to a floor portion of a vehicle body; a rotating support that is connected to a seat body so as to rotate integrally with the seat body and supports the seat body; a bearing that rotatably supports the rotating support on the base body about a vertical axis; a locking mechanism that is provided between the base body and the rotating support and that can selectively lock the rotating support at one of a plurality of rotational positions; a rattle-suppressing member that comes into close contact with the base body and the rotating support when the rotational position of the rotating support is locked by the locking mechanism to suppress rattle of the rotating support; and an interlocking member that interlocks the rattle-suppressing member with the locking mechanism so that the rattle-suppressing member releases the contact state in response to the locking mechanism unlocking the rotational position of the rotating support; and a first feature of the vehicle seat device is that the rattle-suppressing member is positioned radially outward of the bearing, and at least a portion of the rattle-suppressing member is positioned so as to overlap the joint between the seat body and the rotating support in a plan view.

[0010] In addition to the first feature, the present invention has a second feature in that at least a portion of the rattle suppression member is positioned in a position that overlaps, in a planar view, with the connecting portion that connects the base body to the floor portion.

[0011] In addition to the first feature, the present invention has a third feature in that the seat portion of the seat body on which the occupant sits has left and right side frames that form the framework of both the left and right sides of the seat portion, and the connecting portions are connecting portions including bolts that connect the left and right side frames to both the left and right sides of the rotating support body, respectively.

[0012] Furthermore, in addition to the first feature, the present invention has a fourth feature in that the rotating support body and the base body are formed in a roughly rectangular shape in a plan view, the rattle suppression member has a main body portion supported at the four corners of the rotating support body so as to be slidable in the radial direction and movable between a predetermined rattle suppression position and an suppression release position, and the main body portion has a tapered tip portion that can be pressed and wedged between a first receiving portion fixed to the four corners of the base body and a second receiving portion fixed to the four corners of the rotating support body.

[0013] In addition to the fourth feature, the present invention has a fifth feature in that spring support members that support springs that constantly urge the main body portion toward the rattle-suppressing position are fixed to the four corners of the rotating support body, and the main body portion is supported by the spring support members so as to be slidable in the radial direction.

[0014] In addition to the fourth feature, the present invention has a sixth feature in that the interlocking member integrally comprises an interlocking member main body formed in the shape of a circular ring plate, arranged concentrically radially outward of the bearing, and rotatable relative to the rotary support body in response to locking and unlocking of the locking mechanism, and a drive unit connected to the interlocking member main body for driving the main body to the inhibiting release position in response to the unlocking.

[0015] In addition to the fourth feature, the present invention has a seventh feature in that a support frame having the second receiving portion integrally therewith and fixed to the four corners of the rotating support body supports the main body portion so as to be slidable in the radial direction.

[0016] In addition to the sixth feature, the present invention has an eighth feature in that spring support members for supporting springs that constantly urge the main body portion toward the rattle suppression position are fixed to the four corners of the rotating support body, and the interlocking member main body is supported by the spring support members so as to be rotatable and slidable.

[0017] In addition to the fourth feature, the present invention has a ninth feature in that the first and second receiving portions are arranged opposite each other in the vertical direction, and the tip portion can be inserted so as to be sandwiched between the first and second receiving portions in the vertical direction. [Effects of the Invention]

[0018] According to the present invention, the rattle suppression member is positioned radially outward from the bearing, so the point of contact of the rattle suppression member with the rotating support and base body can be moved away from the center of rotation of the rotating support, allowing the rattle suppression effect of the rattle suppression member to be more powerful than that of conventional devices in terms of the lever ratio from the center of rotation. Furthermore, even if there is a concern that rattle will occur between the rotating support and the base body due to uneven load distribution on the seat body caused by the forward / backward and left / right shift of the weight of the occupant sitting in the seat, at least a portion of the rattle suppression member is positioned so as to overlap the joint between the seat body and the rotating support in a plan view. Therefore, the rattle suppression member located directly below this joint (i.e., the point where the load is input from the seat body to the rotating support) can more effectively suppress rattle.

[0019] Furthermore, according to the second feature, at least a portion of the rattle suppression member is positioned in a position that overlaps in a plan view with the connecting portion where the base body is connected to the vehicle floor portion, so that the rattle suppression member is positioned so that it also overlaps with the portion where the base body that receives it is connected to the vehicle floor portion, thereby making it possible to more effectively exert the rattle suppression effect and suppress rattle more efficiently.

[0020] Furthermore, according to the third feature, the connection between the seat body and the rotating support (i.e., the above-mentioned load input point) is a connection including a bolt that connects the left and right side frames of the seat cushion to the left and right side portions of the rotating support, respectively. Therefore, a rattle suppression member can be placed directly below the strong load input point from the side frame to the rotating support, thereby effectively exerting the rattle suppression effect.

[0021] According to a fourth feature, the rotary support and the base body are formed in a generally rectangular shape in a plan view, the rattle-suppressing member has a main body supported at the four corners of the rotary support body so as to be slidable in the radial direction and movable between a rattle-suppressing position and an suppression-release position, and the main body has a tapered tip that can be pressed and wedged between a first receiving portion fixed to the four corners of the base body and a second receiving portion fixed to the four corners of the rotary support body, so that the rattle-suppressing member and the first and second receiving portions that receive it can be compactly deployed by utilizing the dead space at the four corners of the rectangular rotary support body and base body. Furthermore, even if the main body of the rattle-suppressing member is formed longer in the sliding direction (radial direction), it can not only be comfortably arranged at the four corners of the rotary support body, but can also be comfortably extended to just below the coupling portion located at the four corners.

[0022] According to the fifth feature, spring support members that support springs that constantly urge the main body portion toward the rattle suppression position are fixed to the four corners of the rotating support body, and the main body portion is supported by the spring support members so that it can slide radially. Therefore, the spring support members also serve as sliding guide means for the rattle suppression members, which contributes to simplifying the structure of the device.

[0023] According to the sixth feature, the interlocking member is integrally provided with an interlocking member main body formed in the shape of a circular ring plate, arranged concentrically radially outward from the bearing, and rotatable relative to the rotary support body in response to locking and unlocking of the locking mechanism, and a drive unit connected to the interlocking member main body for driving the main body to the release position in response to unlocking. Therefore, the interlocking member can link the locking mechanism and the rattle suppression member together regardless of the circumferential position of the locking mechanism, thereby increasing the design freedom of the locking mechanism.

[0024] According to the seventh feature, the support frame, which has the second receiving portion integrally formed therewith and is fixed to the four corners of the rotary support, supports the main body portion so that it can slide radially. Therefore, the support frame, which also serves as the second receiving portion, can also be used as a sliding guide means for the rattle suppression member, which contributes to simplifying the structure of the device.

[0025] According to the eighth feature, spring support members are fixed to the four corners of the rotating support body to support springs that constantly urge the main body toward the rattle-suppressing position, and the interlocking member body is supported by the spring support members so that it can rotate and slide. Therefore, the spring support members also serve as sliding support means for the interlocking member, which contributes to simplifying the structure of the device.

[0026] According to the ninth feature, the first and second receiving portions are arranged opposite each other in the vertical direction, and the tip portion can be inserted so as to be sandwiched between the first and second receiving portions in the vertical direction. Therefore, when the main body portion of the rattle suppression member is pushed and pressed between the first and second receiving portions, the main body portion can be securely sandwiched in the vertical direction, thereby more effectively suppressing the rattle suppression member from rattling up and down. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is an overall perspective view showing an embodiment of a vehicle seat device according to the present invention; [Figure 2] FIG. 2 is a perspective view showing a main part of the seat cushion of the seat device (particularly, elements below the rotary support); [Figure 3] 3 is a view taken along the arrow 3 in FIG. 2, showing the state in which the locking mechanism is in a locking operating state. [Figure 4] 1 is an enlarged plan cross-sectional view of a main part of a locking mechanism, in which the solid line indicates a locked state and the chain line indicates an unlocked state. [Figure 5] Enlarged cross-sectional view of line 5-5 in Figure 3 (locking mechanism in locked state) [Figure 6] Enlarged cross-sectional view of line 5-5 in Figure 3 (locking mechanism unlocked) [Figure 7] Enlarged cross-sectional view of line 7-7 in Figure 5 [Figure 8] Enlarged cross-sectional view of line 8-8 in Figure 5 [Figure 9] 9A-9A are cross-sectional views showing the interlocking structure between the interlocking member and the rattle suppressing member, in which (A) is a view showing the state in which the locking mechanism is in a locked state (an enlarged cross-sectional view taken along line 9A-9A in FIG. 5), and (B) is a cross-sectional view corresponding to FIG. 9A showing the state in which the locking mechanism is in an unlocked state. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, the terms "front and rear," "left and right," and "up and down" refer to directions as seen from the perspective of a seated occupant in a seat facing forward.

[0029] First, in FIG. 1, a seat body S of a vehicle seat device 10 mounted on a vehicle includes a seat cushion Sc on which an occupant's buttocks rest, and a seat back Sb that stands above the rear of the seat cushion Sc and supports the occupant's back and waist.

[0030] The seat frame SF, which forms the framework of the seat body S, includes a seat frame SFc, which forms the framework of the seat cushion Sc, and a back frame SFb, which forms the framework of the seat back Sb. The seat frame SFc is covered with a seat cushion pad Pc, and the back frame SFb is covered with a seat back pad Pb. The back frame SFb is supported at the rear end of the seat frame SFc via an electric or manual reclining mechanism (both of which are well known in the art) so that it can swing back and forth.

[0031] The seat frame SFc has a pair of left and right side frames 11a that are spaced apart laterally and extend in the front-to-rear direction, a front frame 11b that connects the front ends of the side frames 11a, and a rear pipe 11c that connects the rear ends of the pair of side frames 11a. A pan frame 11p that connects the side frames 11a is fixed to the front frame 11b. The front and rear ends of a plurality of seat springs 12 that are spaced apart laterally and extend in the front-to-rear direction while each being bent in a zigzag pattern are spanned between the front frame 11b and the rear pipe 11c.

[0032] The back frame SFb also has a pair of left and right side frames 13a that are spaced apart and extend vertically, a lower horizontal frame 13b that connects the lower ends of the left and right side frames 13a, and an upper horizontal frame 13c that connects the upper ends of the left and right side frames 13a. The left and right ends of multiple seat springs 14 are bridged between the left and right side frames 13a, and a headrest support portion 13ch that supports a headrest is fixed to the upper horizontal frame 13c.

[0033] 2 to 8, the vehicle seat device 10 has, at its lowest part, a base body 40 that functions as a base frame thereof, and the base body 40 is formed in a rectangular shape in a plan view with a large circular hole 40h in the center. A pair of left and right movable rails 15 extending in the front-rear direction are fixed to the undersides of the left and right sides of the base body 40, and the movable rails 15 are supported for front-rear sliding movement by a pair of left and right fixed rails 17 that are fixed to a floor part 16 of the vehicle body and extend in the front-rear direction.

[0034] Thus, the movable rail 15 and the fixed rail 17 cooperate with each other to form a front-rear slide mechanism SL that connects and supports the base body 40 to the floor portion 16 so that the base body 40 can slide only forward and backward. This front-rear slide mechanism SL also forms a connecting portion that connects the base body 40 to the floor portion 16.

[0035] A conventionally well-known fore-aft position adjustment mechanism (not shown) is disposed between the movable rail 15 and the fixed rail 17, which can arbitrarily adjust and fix the fore-aft position of the movable rail 15 (i.e., the base body 40, and ultimately the seat body S), and the fore-aft position adjustment mechanism is manually operated by an operating lever 18 which is linked to the fore-aft position adjustment mechanism and extends forward below the seat cushion Sc.

[0036] The longitudinal position adjustment mechanism may be omitted, in which case the base body 40 is fixed to the floor portion 16 of the vehicle body so that the longitudinal position cannot be adjusted, and the fixed portion forms the connecting portion.

[0037] In addition, a seat rotation mechanism R is provided between the base body 40 and the seat cushion Sc, which supports the seat cushion Sc (and therefore the seat main body S) so that it can rotate about a vertical axis. That is, a rotation support 30 that can rotate together with the seat cushion Sc is disposed above the base body 40, and the four corners of the rotation support 30 (front, rear, left, and right) are fixed (for example, fastened with multiple sets of bolts 31b and nuts 31n) to the seat cushion Sc (more specifically, the left and right side frames 11a of the seat frame SFc), respectively.

[0038] Thus, the bolt 31b and the nut 31n constitute a connecting portion 31 that connects the seat body S to the rotating support body 30. The head of the bolt 31b may be fixed (for example, welded) to the rotating support body 30, so that the bolt 31b serves as a stud bolt that stands up from the upper surface of the rotating support body 30.

[0039] The rotating support 30 is formed in a rectangular shape in a plan view with a large circular hole 30h in the center, and a bearing 45 (e.g., a ball bearing) is interposed between the rotating support 30 and the inner periphery of the base body 40 to support the rotating support 30 rotatably around a vertical axis.

[0040] A circular ring-shaped base plate 41, which has integrally formed thereon a ball-receiving recess for the lower side of bearing 45, is superimposed on and fixed (for example, bolted) to the upper surface of the inner periphery of base body 40, and bearing 45 is supported on the inner periphery of base body 40 via base plate 41. On the other hand, rotating support 30 has integrally formed on the lower surface of its inner periphery a ball-receiving recess for the upper side of bearing 45, and the upper surface of the inner periphery of rotating support 30 is rotatably and slidably held by an annular holding plate 47 via an annular slider 46.

[0041] The retaining plate 47 integrally comprises a cylindrical outer peripheral upright wall 47w, a slider retaining portion 47s connected to the lower end of the outer peripheral upright wall 47w, and an inward flange portion 47f connected to the inner peripheral end of the slider retaining portion 47s, and the flange portion 47f is overlapped and fixed to the inner peripheral portion of the base plate 41 (and therefore the base body 40) with a plurality of fasteners 48 (e.g., rivets, bolts, etc.).

[0042] Also, between the rotating support 30 and the base body 40 are interposed a locking mechanism L that can selectively lock the rotating support 30 (and therefore the seat main body S) at one of a plurality of rotational positions, a rattle suppression mechanism G that suppresses rattle of the rotating support 30 when the rotating support 30 is locked at each rotational position by the locking mechanism L, and an interlocking mechanism I that normally enables the rattle suppression function of the rattle suppression mechanism G to be effectively exerted but interlocks the rattle suppression mechanism G with the locking mechanism L so as to temporarily disable the rattle suppression function in response to an unlocking operation of the locking mechanism L. Next, a specific example of these mechanisms L, G, and I will be described in order.

[0043] The locking mechanism L includes a bell crank-shaped locking lever 51 whose middle portion is pivotally supported 51p on the front portion of the rotating support 30, a locking spring 53 stretched between the locking lever 51 and the rotating support 30 and biasing the locking lever 51 in the locking direction (counterclockwise in Figures 3 and 4), a locking hole 32 provided in the short cylindrical intermediate upright wall 30w of the rotating support 30, a locking hole 42 provided in the outer peripheral upright wall 47w of the holding plate 47, and a locking claw 54 protruding from the tip arm 51a of the locking lever 51 and capable of engaging and disengaging with the locking holes 32, 42.

[0044] 3 to 5, the lock mechanism L locks the rotational position of the rotatable support 30 (and therefore the seat body S) by engaging the lock claw 54 with both lock holes 32, 42. When the lock lever 51 is unlocked and in the unlocked position shown by the chain line in FIG. 4 or in FIG. 6, the lock claw 54 is disengaged from at least the lock hole 42, allowing the rotatable support 30 to rotate relative to the base body 40, and the seat body S can be rotated to any rotational position.

[0045] Only one lock hole 32 is arranged around the lock lever 51 corresponding to the lock claw 54, but multiple lock holes 42 are arranged corresponding to multiple rotation positions of the seat body S to be locked by the lock mechanism L. For example, in the illustrated example, the rotation position of the seat body S can be selected from two rotation positions, namely, a front rotation position in which the seat body S faces forward and a rear rotation position that is shifted 180 degrees from the front rotation position in which the seat body S faces rearward, and therefore, as is clear from Figures 2 and 3, the lock holes 42 are set at positions that are shifted 180 degrees in phase at the front and rear of the holding frame 47.

[0046] The base arm 51b of the lock lever 51 projects forward from below the front of the seat cushion Sb and functions as an operating lever that can be manually operated by the occupant. The base arm 51b of the lock lever 51 is interlocked and connected to an interlocking mechanism I, as will be described later.

[0047] The interlocking mechanism I includes an interlocking member 60 that is arranged concentrically on the radially outer side of the bearing 45 and is supported on the rotary support 30 so as to be rotatable and slidable, and a linking mechanism 59 that links the swinging operation of the lock lever 51 to the interlocking member 60.

[0048] The interlocking member 60 is integrally provided with an interlocking member main body 61 formed in the shape of a circular ring plate and which rotates relative to the rotary support 30 in response to the locking / unlocking operation of the locking mechanism L, and a drive part 62 which is integrally connected to the interlocking member main body 61 and drives a main part 71 of a rattle suppression member 70 (described later) toward the suppression release position via a driven part 72 in response to the unlocking operation of the locking mechanism L.

[0049] The inner periphery of the interlocking member body 61 is rotatably and concentrically fitted onto and supported by the outer periphery of the intermediate upright wall 30w of the rotary support 30, and the lower surface of the interlocking member body 61 is slidably supported on the upper surface of the base 77b of the spring support member 77, which will be described later. A bracket portion 61b is integrally formed on the front outer periphery of the interlocking member body 61, projecting radially outward (forward).

[0050] The linkage mechanism 59 includes an elongated hole or slit 61bs provided at the tip of the bracket portion 61b, and an engagement pin 51k that slidably engages with the elongated hole or slit 61bs and is fixed to the middle portion of the base arm 51b of the lock lever 51. For example, when the lock lever 51 is operated to unlock in the unlocking direction (clockwise in FIG. 4: the direction of the outline arrow), the engagement pin 51k slides in the elongated hole or slit 61bs in response, and the rotational force of the lock lever 51 is transmitted to the bracket portion 61b, causing the interlocking member 60 to rotate in the same direction by a predetermined angle.

[0051] Thus, the interlocking mechanism I transmits the movement of the lock lever 51 to the rattle suppression member 70 via the interlocking member 60. For example, when the lock lever 51 is operated to unlock in the unlocking direction (the direction of the white arrow in Figure 4) against the elastic force of the lock spring 53, the interlocking member 60 is rotated in response to this operation in a direction in which the rattle suppression member 70 is temporarily disabled (i.e., held in the suppression release position) as shown in Figures 6 and 9(B).

[0052] 5 to 9, an example of a rattle suppression mechanism G that suppresses rattle of the rotary support 30 when the rotational position of the rotary support 30 is locked by the locking mechanism L will be described. The rattle suppression mechanism G has, as its main component, a rattle suppression member 70 that is in close contact with the base body 40 and the rotary support 30 to suppress rattle. That is, the rattle suppression member 70 is located radially outward of the bearings 45, and is disposed at the four corners of the rotary support 30, which has a substantially rectangular shape in plan view, so as to be radially slidable.

[0053] Furthermore, at least a portion of the rattle suppression member 70 is positioned so as to overlap, in plan view, the connecting portion 31 between the seat body S and the rotating support body 30, including the bolt 31b, and also so as to overlap the connecting portion (i.e., the front-to-rear slide mechanism SL) where the base body 40 is connected to the floor portion 16.

[0054] 5 to 9, the main body portion 71 of the rattle suppression member 70 is formed to be flat in the vertical direction and long in the radial direction, and is supported by the rotary support body 30 so as to be slidable in the radial direction. A tapered tip portion 71a of this main body portion 71 is configured so as to be insertable into and removable from a first receiving portion 81 fixed to the base body 40 and a second receiving portion 82 fixed to the rotary support body 30, and so as to be pressed into and wedged between them in a wedge-like manner.

[0055] That is, the front end 71a of the main body 71 has a horizontal and flat upper surface that serves as a first pressure contact surface 71f1 that can be brought into pressure contact with the first receiving portion 81, and the lower surfaces on both sides of the front end 71a in the width direction serve as a pair of second pressure contact surfaces 71f2 that can be brought into pressure contact with the second receiving portion 82. The second pressure contact surfaces 71f2 are each formed as an inclined surface that slopes upward toward the front end of the main body 71.

[0056] A driven part 72 protrudes upward from the upper surface of the base 71b of this main body part 71. The driven part 72 receives a driving force from the interlocking member 60 (more specifically, the driving part 62) that drives the main body part 71 in the direction opposite to the pushing direction into the first and second receiving parts 81, 82 when the locking mechanism L is unlocked, thereby disabling the rattle suppression member 70.

[0057] The first receiving portion 81 is configured by a ceiling wall 90t of a frame body 90 formed in a box shape with an open radially inward side (i.e., the side facing the main body portion 71) and fixed upright on the base body 40. The ceiling wall 90t extends radially inward, making it possible to ensure a sufficient contact area with the first pressure contact surface 71f1 of the main body portion 71.

[0058] The second receiving portion 82 is formed by the inclined upper surfaces of a pair of support frames 91 that are each L-shaped in side view and protrude downward from the lower surface of the rotary support 30, and slidably abuts against and supports the pair of second pressure contact surfaces 71f2 of the rattle suppression member 70. The support frames 91 support the intermediate portion of the main body portion 71 on their respective base sides so that the intermediate portion can slide in the radial direction.

[0059] A protrusion 71t extending in the sliding direction is formed on one of the opposing surfaces (i.e., sliding surfaces) between the inner surfaces of the bases of the pair of support frames 91 and both the left and right side surfaces of the main body 71, and a recessed groove 91o that engages with the protrusion 71t is formed on the other of the opposing surfaces. As a result, the support frame 91, which supports the main body 71 on the rotary support 30 so that the main body 71 is slidable in the radial direction, also serves as the second receiving portion 82 that performs the rattle suppression function in cooperation with the rattle suppression member 70, thereby making it possible to achieve a simplification of the structure.

[0060] A part of the main body portion 71 and a part of the first and second receiving portions 81, 82 overlap with the joint portion 31 between the seat body S and the rotating support body 30 in a plan view. In this case, the main body portion 71 of the rattle suppression member 70 is formed long in the radial direction, so that it can be reasonably extended to a position directly below the joint portion 31.

[0061] In addition, in this embodiment, multiple sets of rattle suppression members 70 and multiple spring support members 77 are arranged at intervals in the circumferential direction of the rotating support body 30 (i.e., at the four corners of the rotating support body 30). This makes it possible to utilize the spaces at the four corners of the rotating support body 30 and the base body 40 to comfortably and compactly arrange the rattle suppression members 70 and the first and second receiving portions 81, 82, etc.

[0062] 5 to 9, the driven part 72 of the rattle suppression member 70 is formed in the shape of a pin that protrudes upward from the upper surface of the base of the main part 71, and the surface of the driven part 72 that faces the drive part 62 is formed in a semi-cylindrical surface. The drive part 62 of the interlocking member 60 is formed in a flat cam body that slopes radially outward from the outer periphery of the interlocking member main body 61 toward the driven part 72. The upper end of the driven part 72 is integrally connected to a flat reinforcing plate part 61t that extends radially outward from the upper outer periphery of the interlocking member main body 61, thereby reinforcing the driven part 72.

[0063] Thus, as is clear from Figure 9, the drive portion 62 of the interlocking member 60, which rotates in conjunction with the unlocking operation of the locking mechanism L, can drive the driven portion 72 (and therefore the main body portion 71) radially inward while sliding, thereby allowing the main body portion 71 to be pulled out from between the first and second receiving portions 81, 82 (i.e., the rattle suppression function of the rattle suppression member 70 is disabled), and as a result of this pulling out, rotation of the rotating support body 30 to any rotational position is also permitted.

[0064] In this embodiment, a spring 76 that applies a radially outward resilient force to the rattle suppression member 70, enabling the main body portion 71 to be pressed between the first and second receiving portions 81, 82, and a spring support member 77 that supports the base end of the spring 76 on the rotary support body 30, are disposed on the radially inner side of the main body portion 71. The spring support member 77 has both circumferential ends of a base portion 77b closer to the radially inner side fixed by bolts 95 of the rotary support body 30, and a support pin 77p protrudes from the base portion 77b, into which the base end of the spring 76 made of a coil spring is fitted. Furthermore, a tip portion 77c of the spring support member 77 slidably supports the underside of the base portion of the main body portion 77.

[0065] Thus, when the locking mechanism L locks the rotating support body 30 in a desired rotational position, the spring 76 supported on the rotating support body 30 via the spring support member 77 exerts a wedge action by pressing the main body portion 71 (rattle-suppressing member 70) between the first and second receiving portions 81, 82 based on its elastic force, thereby suppressing rattle of the rotating support body 30 (and therefore the seat main body S). Furthermore, the upper surface of the base portion 77b of the spring support member 77 has an interlocking member receiving portion 77ha that supports the interlocking member 60 (interlocking member main body 61) so that the interlocking member 60 can rotate relatively thereto.

[0066] Thus, the spring support member 77 that supports the base end of the spring 76 can also be used as a support means that slidably supports the interlocking member 60 and the rattle suppression member 70 (main body portion 71), thereby contributing to a simplified structure.

[0067] Furthermore, the first and second receiving portions 81, 82 are arranged opposite each other in the vertical direction, and when the main body portion 71 is pushed and pressed between the two receiving portions 81, 82, the main body portion 71 can be securely clamped in the vertical direction, thereby more effectively preventing the main body portion 71 (rattle suppression member 70) from rattling up and down.

[0068] Next, the operation of this embodiment will be described. The rattle suppression member 70 of this embodiment is disposed radially outward from the bearing 45, and this arrangement allows the point of contact of the rattle suppression member 70 with the rotating support 30 and base body 40 to be moved away from the center of rotation of the rotating support 30. This allows the rattle suppression effect of the rattle suppression member 70 to be more powerful than that of conventional devices in terms of the lever ratio from the center of rotation.

[0069] Furthermore, as the weight of an occupant sitting on the seat cushion Sc shifts back and forth and side to side, a bias may occur in the distribution of the load received by the seat body S on the rotating support 30, which may cause rattles between the rotating support 30 and the base body 40. In this case, in this embodiment, at least a portion of the rattle-suppressing member 70 is disposed in a position that overlaps, in plan view, with the connecting portion 31 including the bolt 31b connecting the seat body S and the rotating support 30. Therefore, the rattle-suppressing member 70 located directly below this connecting portion 31 (i.e., the point where the load is input from the seat body S to the rotating support 30) can more effectively exert rattle-suppressing effects. This effectively suppresses rattles in the rotating support 30.

[0070] Furthermore, at least a portion of the rattle suppression member 70 is disposed at a position that overlaps, in plan view, with the connecting portion (front-rear slide mechanism SL) that connects the base body 40 to the vehicle body floor portion 13. In other words, the rattle suppression member 70 is disposed so as to overlap, in plan view, with the connecting portion (front-rear slide mechanism SL) between the base body 40, which receives it via the first receiving portion 81, and the vehicle body floor portion 13, so that the rattle suppression effect can be exerted even more effectively, and rattle of the rotating support body 30 can be suppressed more efficiently.

[0071] In addition, the rotating support 30 and base body 40 in this embodiment are formed in an approximately rectangular shape when viewed from above, and the rattle suppression member 70 has a main body portion 71 that is supported radially slidably at the four corners of the rotating support 30 and is movable between a predetermined rattle suppression position and an suppression release position, and the main body portion 71 has a tapered tip portion 71a that can be pressed and wedged in a wedge-like manner between a first receiving portion 81 fixed to the four corners of the base body 40 and a second receiving portion 82 fixed to the four corners of the rotating support 30.

[0072] This allows the rattle suppression member 70 and the first and second receiving portions 81, 82 that receive it to be compactly arranged by utilizing the dead space at the four corners of the rectangular rotating support body 30 and base body 40. Furthermore, even if the main body portion 71 of the rattle suppression member 70 that is slidable in the radial direction is formed longer in the sliding direction (radial direction), it can not only be arranged reasonably at the four corners of the rotating support body 30, but can also be reasonably extended to just below the connecting portion 31 located at those four corners.

[0073] In addition, spring support members 77 are fixed to the four corners of the rotating support body 30 to support springs 76 that constantly urge the main body 71 of the rattle suppression member 70 toward the rattle suppression position. The main body 71 of the rattle suppression member 70 is supported by the spring support members 77 so that it can slide radially. Therefore, the spring support members 77 also serve as sliding guide means for the rattle suppression member 70, thereby simplifying the structure of the device.

[0074] The interlocking member 60 is integrally provided with an interlocking member main body 61 formed in the shape of a circular ring plate, arranged concentrically on the radially outer side of the bearing 45, and supported so as to be rotatable relative to the rotary support 30 in response to the locking and unlocking of the locking mechanism L, and a drive part 62 connected to the interlocking member main body 61 and configured to drive the main body part 71 to the release position in response to the unlocking operation of the locking mechanism L. This allows the locking mechanism L and the rattle-suppressing member 70 to be linked together via the interlocking member 60 regardless of the circumferential position of the locking mechanism L, thereby increasing the degree of freedom in designing the locking mechanism L.

[0075] Furthermore, the support frame 91, which has the second receiving portion 82 integrally formed therewith and is fixed to the four corners of the rotary support 30, supports the main body portion 71 so that it can slide radially. Therefore, the support frame 91, which also serves as the second receiving portion 82, can also be used as a sliding guide means for the rattle suppression member 70, thereby simplifying the structure of the device.

[0076] Furthermore, the interlocking member body 61 is supported rotatably and slidably by spring support members 77 fixed to the four corners of the rotary support body 30, so that the spring support members 77 also serve as a sliding support means for the interlocking member 60, thereby simplifying the structure of the device.

[0077] Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various design modifications are possible without departing from the gist of the present invention.

[0078] For example, in the above embodiment, the rotation position of the seat body S can be selected from two rotation positions, namely, a front rotation position in which the seat body S faces forward and a back rotation position which is 180 degrees out of phase with the front rotation position and faces backward, but the rotation positions that can be selected arbitrarily for the seat body S are not limited to the embodiment and the reference embodiment. That is, the rotation positions may be changed or three or more positions may be set, in which case the opening positions of the lock holes 42 on the base body 40 side may be changed or added depending on the rotation position that is set. [Explanation of symbols]

[0079] L····· Locking mechanism S... Seat body SL: Forward and backward sliding mechanism as a connecting part Sc····Seat 10. Seat device 11a Side frame 16 Floor section 30 Rotating support 31...Joining part 31b···Bolt 40...Base body 45 Bearing 60... Interlocking member 61 Interlocking member body 62 Drive unit 70. Rattle suppression member 71...Main body of rattle suppression member 71a....Tip of rattle suppression member 76 Spring 77 Spring support member 81, 82: First and second receiving parts 91... Support frame

Claims

1. The seat includes a base body (40) connected to and supported by a floor portion (16) of the vehicle body, a rotary support body (30) connected to a seat body (S) and supporting the seat body (S), a bearing (45) for supporting the rotary support body (30) on the base body (40) so as to be rotatable about a vertical axis, a locking mechanism (L) provided between the base body (40) and the rotary support body (30) and capable of selectively locking the rotary support body (30) at one of a plurality of rotational positions, and a locking mechanism (L) for locking the rotary support body (30) at one of a plurality of rotational positions. a rattle suppressing member (70) that is in close contact with the rotational support (30) and the base body (40) to suppress rattle of the rotational support (30) when the rotational position of the rotational support (30) is locked, and an interlocking member (60) that interlocks the rattle suppressing member (70) with the locking mechanism (L) so that the rattle suppressing member (70) releases the contact state in response to the locking mechanism (L) unlocking the rotational position of the rotational support (30), the rattle suppressing member (70) is disposed radially outward of the bearing (45), and at least a portion of the rattle suppressing member (70) is disposed at a position overlapping a connecting portion (31) between the seat body (S) and the rotation support body (30) in a plan view; The rotary support body (30) and the base body (40) are formed in a substantially rectangular shape in a plan view, The rattle suppressing member (70) includes a main body (71) that is supported at four corners of the rotary support (30) so as to be radially slidable and that is movable between a predetermined rattle suppressing position and a suppression release position, The vehicle seat device is characterized in that the main body (71) has a tapered tip (71a) that can be pushed and pressed in a wedge-like manner between first receiving portions (81) fixed to the four corner portions of the base body (40) and second receiving portions (82) fixed to the four corner portions of the rotation support body (30).

2. 2. The vehicle seat device according to claim 1, wherein at least a portion of the rattle suppression member (70) is positioned in a position that overlaps in a plan view with a connecting portion (SL) at which the base body (40) is connected to the floor portion (16).

3. The seat body (S) has a seat portion (Sc) on which an occupant sits, and the seat portion (Sc) has left and right side frames (11a) that form the framework of both left and right sides of the seat portion (Sc), 2. The vehicle seat device according to claim 1, wherein the connecting portions (31) are connecting portions including bolts (31b) that connect the left and right side frames (11a) to the left and right side portions of the rotation support body (30), respectively.

4. 2. The vehicle seat device according to claim 1, wherein spring support members (77) supporting springs (76) that constantly bias the main body portion (71) toward the rattle suppression position are fixed to four corners of the rotary support member (30), and the main body portion (71) is supported by the spring support members (77) so as to be slidable in the radial direction.

5. 2. The vehicle seat device according to claim 1, wherein the interlocking member (60) is integrally provided with: an interlocking member main body (61) formed in the shape of a circular ring plate, arranged concentrically on the radially outer side of the bearing (45), and rotatable relative to the rotary support (30) in response to locking and unlocking of the locking mechanism (L); and a drive unit (62) connected to the interlocking member main body (61) for driving the main body portion (71) to the restraint release position in response to the unlocking.

6. 2. The vehicle seat device according to claim 1, wherein a support frame (91) having the second receiving portion (82) integrally therewith and fixed to four corner portions of the rotary support (30) supports the main body portion (71) so as to be slidable in the radial direction.

7. 6. The vehicle seat device according to claim 5, wherein spring support members (77) supporting springs (76) that constantly urge the main body (71) toward the rattle suppression position are fixed to the four corners of the rotary support member (30), and the interlocking member main body (61) is rotatably and slidably supported by the spring support members (77).

8. The first and second receiving portions (81, 82) are arranged opposite each other in the vertical direction, 2. The vehicle seat device according to claim 1, wherein the tip portion (71a) can be inserted between the first and second receiving portions (81, 82) so as to be sandwiched in the vertical direction.

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