阅读说明：本技术 车辆座椅
(Vehicle seat
) 是由 杮岛康雄
R·F·泽维尔
A·亚伯拉罕
R·恩特鲁普 于 2019-08-19 设计创作，主要内容包括：本发明涉及一种车辆座椅,其设置有：座椅滑动机构(a),其包括下部导轨和在下部导轨中配合和移动的上部导轨；座椅结构(b),其配备有包括座椅侧构件的座椅座垫框架和座椅靠背框架；上部竖板(c),其固定到上部导轨并支撑座椅结构；以及座椅倾斜机构(d),其使座椅结构能够相对于上部竖板倾斜。当座椅结构通过座椅倾斜机构而倾斜时,座椅座垫框架和座椅靠背框架之间的角度保持不变,座椅座垫框架的后部位于在座椅结构通过座椅倾斜机构倾斜之前的状态下的座椅座垫框架的后部的上方。(The invention relates to a vehicle seat provided with: a seat slide mechanism (a) including a lower rail and an upper rail fitted and moved in the lower rail; a seat structure (b) equipped with a seat cushion frame and a seat back frame including seat side members; an upper riser (c) fixed to the upper track and supporting the seat structure; and a seat reclining mechanism (d) that enables the seat structure to be reclined with respect to the upper riser. When the seat structure is tilted by the seat reclining mechanism, the angle between the seat cushion frame and the seat back frame is kept constant, and the rear portion of the seat cushion frame is located above the rear portion of the seat cushion frame in a state before the seat structure is tilted by the seat reclining mechanism.)
1. A vehicle seat, comprising:
a seat slide mechanism including a lower rail oriented in a first direction and an upper rail fitted into the lower rail and moving in the first direction;
a seat structure provided with a seat cushion frame including a seat side member oriented in the first direction and a seat back frame connected to the seat cushion frame through a recliner;
an upper riser secured to the upper track for supporting the seat structure; and
a seat recline mechanism enabling the seat structure to recline relative to the upper riser,
wherein an angle between the seat cushion frame and the seat back frame is kept constant when the seat structure is tilted by the seat reclining mechanism, and a rear portion of the seat cushion frame is located on an upper side of a rear portion of the seat cushion frame in a state before the seat structure is tilted by the seat reclining mechanism.
2. The vehicle seat according to claim 1,
wherein the seat recline mechanism rotatably connects the seat side member to the upper riser.
3. The vehicle seat according to claim 2,
wherein the seat recline mechanism maintains the seat structure in a first position; and is
The seat recline mechanism is capable of rotating the seat structure between the first and second positions.
4. The vehicle seat according to claim 2,
wherein the seat side member is constituted by a pair of seat side members;
the seat cushion frame is further provided with a front cross member connecting front portions of the pair of seat side members and a rear cross member connecting rear portions of the pair of seat side members; and is
The seat recline mechanism is located between the front cross member and the rear cross member.
5. The vehicle seat according to claim 4,
wherein the seat recline mechanism is provided with a rotary latch between the seat side member and the upper riser; and is
The rotary latch rotatably connects the seat side member with the upper riser.
6. The vehicle seat according to claim 5,
wherein the seat reclining mechanism is provided with a spring for pressing the seat structure to rotate the seat structure forward.
7. The vehicle seat according to claim 6,
wherein the upper riser is provided with a stop for stopping rearward rotation of the seat structure.
8. The vehicle seat according to claim 4,
wherein the rotational axis of the seat recline mechanism is located a distance away from the rear cross member corresponding to 1/3 through 1/2 of the distance between the rear cross member and the front cross member.
9. The vehicle seat according to claim 1,
wherein the seat recline mechanism connects the seat side member to the upper riser.
10. The vehicle seat according to claim 9,
wherein the seat recline mechanism retains the seat structure in the first position; and is
The seat recline mechanism enables the seat structure to recline between the first and second positions.
11. The vehicle seat according to claim 9,
wherein the seat side member is constituted by a pair of seat side members;
the seat cushion frame is further provided with a front cross member connecting front portions of the pair of seat side members and a rear cross member connecting rear portions of the pair of seat side members;
the seat tilting mechanism is provided with a front side link mechanism and a rear side link mechanism;
the front link mechanism is provided with a front sidebar that connects the seat side member to the upper riser and a front coupling portion that connects the front sidebar to the front cross member; and is
The rear link mechanism is provided with a rear handle connecting the seat side member to the upper riser and a rear coupling portion connecting the rear handle to the rear cross member.
12. The vehicle seat according to claim 11,
wherein the front cross member is moved forward by the rear linkage; and is
The rear cross member is moved upward by the rear link mechanism.
13. The vehicle seat according to claim 11,
wherein the rear linkage is provided with a rotary latch between the seat side member and the upper riser; and is
The rotary latch rotatably connects the seat side member and the upper riser.
Technical Field
The present disclosure relates to a vehicle seat, and may be applied to a vehicle seat equipped with a child safety seat, for example.
Background
In order to enhance the ease of ingress and egress of the rear row seats arranged on the rear side and expand the cargo space, a vehicle seat capable of forward movement and rotation is employed.
Disclosure of Invention
However, since the rotation of the seat back is hindered when there is a child safety seat or the like on the seat, the accessibility of the rear seat or the expansion of the cargo space may also be deteriorated.
An object of the present disclosure is to provide a vehicle seat capable of enhancing the accessibility of a rear seat or expanding a cargo space.
Other objects and novel features will be set forth in part in the description of the disclosure and the accompanying drawings.
A brief description of a representative overview of the disclosure follows.
That is, the vehicle seat is provided with: a seat slide mechanism (a) including a lower rail oriented in a first direction and an upper rail fitted in the lower rail to move in the first direction; a seat structure (b) provided with a seat cushion frame including a seat side member oriented in a first direction and a seat back frame connected to the seat cushion frame via a recliner; an upper riser (c) fixed to the upper track to support the seat structure; and a seat tilt mechanism (d) that enables the seat structure to tilt relative to the upper riser. When the seat structure is tilted by the seat reclining mechanism, the angle between the seat cushion frame and the seat back frame is kept constant, and the rear portion of the seat cushion frame is located above the rear portion of the seat cushion frame before the seat structure is tilted by the seat reclining mechanism.
Drawings
Fig. 1 is a side view showing a vehicle interior in a first embodiment;
FIG. 2 is a side view for explaining the outline of a seat reclining mechanism for reclining the second row seat shown in FIG. 1;
fig. 3 is a perspective view showing a seat structure of the second row seat shown in fig. 1, viewed from the front side;
FIG. 4 is a top view illustrating the seat structure shown in FIG. 3;
FIG. 5 is a perspective view showing the seat structure shown in FIG. 3 viewed from the rear side;
FIG. 6 is a side view showing the seat structure shown in FIG. 3;
fig. 7A is a perspective view showing the inside of the rotary latch, and fig. 7B is a perspective view showing the outside of the rotary latch;
fig. 8 is a side view showing a state where the seat structure is moved forward from the position shown in fig. 6;
fig. 9 is a side view showing a state where the seat structure is rotated forward from the position shown in fig. 8;
fig. 10 is a perspective view showing the seat structure in the state shown in fig. 9, viewed from the rear side;
fig. 11 is a side view showing the vehicle inside in the second embodiment;
FIG. 12 is a side view for explaining the outline of a seat reclining mechanism for reclining the second row seat shown in FIG. 11;
fig. 13 is a perspective view showing a seat structure of the second row seat shown in fig. 11, viewed from the front side;
fig. 14 is a perspective view showing a state in which the seat structure shown in fig. 13 is tilted as viewed from the rear side;
FIG. 15 is a perspective view showing the seat structure shown in FIG. 14 viewed from the rear side;
FIG. 16 is a perspective view showing the seat structure shown in FIG. 14 viewed from the rear side;
FIG. 17 illustrates the relationship between the front and rear linkages of the second row of seats shown in FIG. 13;
FIG. 18 is a side view showing the seat structure of the second row of seats shown in FIG. 13; and
fig. 19 is a side view showing a state where the seat structure is moved forward and tilted from the position shown in fig. 17.
Detailed Description
In vehicles such as vans and off-road vehicles (SUVs), three or more rows of seats are arranged in the longitudinal direction. For example, when a vehicle is provided with three rows of seats, the second row of seats may partially obstruct access to the third row of seats, depending on the position of the opening of the door. Therefore, it is performed to secure a large passage in front of the third row seat by moving the second row seat. That is, the second-row seat may slide forward, and the seat back thereof may be tilted forward. When the seat back is tilted forward and the second row seats are moved in the forward position, passenger accessibility to the third row seats may be enhanced.
However, when a child safety seat or the like is present on the second-row seat, the forward tilting of the seat back is hindered, and the accessibility of the third-row seat also becomes poor.
Then, the vehicle seat equivalent to the embodiment may be slid forward, and may be tilted forward in a state where the angle between the seat cushion and the seat back is maintained. In this case, when the vehicle seat is tilted forward, the rear portion of the seat cushion is lifted. Therefore, the space at the rear of the vehicle seat can be expanded.
Some embodiments will be described using the following figures. However, in the following description, the same reference numerals are assigned to the same components, and a repetitive description thereof may be omitted. For further clarity of explanation with the aid of the figures, the figures may schematically represent the width, thickness, contour, etc. of the parts compared to the actual situation; however, they are merely described as an example, and the present invention is not limited to their explanation.
In the following description, as a standard, the vertical direction is defined as a vertical direction using a case where the vehicle-mounted vehicle seat is horizontally positioned. In addition, the longitudinal direction (FR, RR) is defined as the longitudinal direction of the vehicle, and the lateral direction (width direction) is defined as the vehicle width direction. FR denotes a forward direction of the vehicle, and RR denotes a backward direction of the vehicle. Further, the right side (RH) and the left side (LH) of the vehicle seat should be the right side and the left side when the vehicle seat is viewed from the rear of the vehicle.
First embodiment
Fig. 1 is a side view showing the vehicle inside equivalent to the first embodiment. Fig. 2 is a side view explaining the outline of a seat reclining mechanism for the second-row seat shown in fig. 1.
The first row seat 12, the second row seat 14, and the third row seat 16 are arranged on the floor 2 of the vehicle 1 in this order from front to rear. A different horizontal portion 2a that becomes lower downward toward the front is formed in front of the area where the second-row seats 14 are arranged in the floor panel 2. Each row is provided with a plurality of seats; however, the seat on the right side of the vehicle will be described below.
The second-row seat 14 is provided with a seat cushion 22 and a seat back 24 connected to a rear side of the seat cushion 22.
Further, as shown in fig. 2, the second-row seat 14 is provided with a seat slide mechanism 26 for moving the seat cushion 22 and the seat back 24 in the longitudinal direction and a seat reclining mechanism 30 for enabling the seat cushion 22 and the seat back 24 to rotate about a lateral axis of the vehicle 1. Further, the seat reclining mechanism 30 maintains the angle between the seat cushion 22 and the seat back 24 while rotating. In such a configuration, even if the child safety seat 40 or the like is present on the second-row seat 14, the second-row seat 14 can be tilted forward and can be moved in the longitudinal direction by the seat slide mechanism 26. Although the child safety seat 40 is present on the second row seat 14, the space at the rear of the second row seat 14 may expand due to the combination of forward tilting and forward movement of the second row seat 14, e.g., passengers on the third row seat may easily get in and out.
As shown in fig. 2, the second row seat 14 moves forward 41 and rotates forward from the initial position 42 to the position shown in fig. 2. For example, to gain access to the third row of seats 16, an occupant of the vehicle operates a release mechanism (towel bar, other and later described release levers) of the second row of seats 14. Thereby, the second row seat 14 moves forward 41 and may rotate in direction 43. As a result, as the size of the area between the second row seat 14 and the third row seat 16 increases, access to the third row seat 16 is accelerated. Furthermore, because the angle between the seat back 24 and the seat cushion 22 remains substantially constant as the second row seat 14 rotates, the seat recline mechanism may enhance accessibility to the third row seat 16 by expanding the space at the rear of the second row seat 14 independent of the presence of the child safety seat 40. When an occupant sits on the third row seat 16, the second row seat 14 can be rotated and moved to the initial position 42 to maintain the comfort of the occupant in the second row seat 14.
Next, the seat structure will be described with reference to fig. 3 to 6. Fig. 3 is a perspective view showing a seat structure of the second row seat shown in fig. 1, viewed from the front side. Fig. 4 is a plan view showing the seat structure shown in fig. 3. Fig. 5 is a perspective view showing the seat structure shown in fig. 3 viewed from the rear side. Fig. 6 is a side view showing the seat structure shown in fig. 3. Fig. 7A is a perspective view showing the inside of the rotary latch. Fig. 7B is a perspective view showing the outside of the rotary latch.
The seat structure 21 of the second-row seat 14 is provided with a seat cushion frame 23 and a seat back frame 25, and these frames are attached to a seat slide mechanism 26. The seat slide mechanism 26 enables the seat structure 21 to move in the longitudinal direction along the forward direction 41. The seat reclining mechanism 30 enables the seat structure 21 to be rotated based on the seat slide mechanism 26.
The seat cushion 22 includes a seat cushion frame 23, a cushion, and a cover. The seat back 24 also has a similar configuration, and is configured by being fixed by a seat back frame 25 through a seat cushion and being wrapped in a cover.
The seat cushion frame 23 is provided with seat side members 23a, 23b, a front cross member 23c connected to the front sides of the seat side members 23a, 23b, a rear cross member 23d connected to the rear sides of the seat side members 23a, 23b, and recliner brackets 23e, 23f connected to the rear sides of the seat side members 23a, 23 b.
The seat back frame 25 is provided with rear vertical tubes 25a, 25b, an upper cross member 25c connected to upper sides of the rear vertical tubes 25a, 25b, brackets 25d, 25e connected to lower sides of the rear vertical tubes 25a, 25b, and a lower cross member 25f connected to the brackets 25d, 25 e.
The seat structure 21 is provided with a recliner mechanism 28 for rotating the seat back frame 25 on the basis of the seat cushion frame 23. Thus, the seat back frame 25 is supported by the recliner brackets 23e, 23f equipped with the recliner mechanism 28. The recliner mechanism 28 is provided with a recliner 28a attached to the recliner bracket 23e, recliner auxiliary springs 28b, 28c, a recliner connecting rod 28d, and attachment brackets 28e, 28f attached to the brackets 25d, 25 e. The recliner mechanism 28 enables the seat back frame 25 to rotate in the rearward direction 45 about the lateral axis 48.
The second-row seat 14 includes upper risers 29a, 29b for supporting the seat cushion frame 23. The upper risers 29a, 29b are triangular in shape, with obtuse vertices in side view, and the seat recline mechanism 30 is located on one side of each vertex. The base sides of the upper risers 29a, 29b are fixed to the upper rails 26c, 26d of the seat slide mechanism 26 by bolts or other fixing members.
The seat slide mechanism 26 includes a pair of lower rails 26a, 26b, respective upper rails 26c, 26d (see fig. 8-10), a towel bar 26e, and an operating member. The upper rails 26c, 26d fit into the respective lower rails 26a, 26b and move in the longitudinal direction 41. The seat slide mechanism 26 includes a latch that fits into each of the upper rails 26c, 26d in an opening of the respective lower rails 26a, 26 b. Thereby, the longitudinal movement of the seat structure 21 is blocked. When the passenger turns the towel bar 26e to move the seat structure 21, the engagement of the latch is released from the opening, and the upper rails 26c, 26d can be moved from the respective lower rails 26a, 26 b. By providing the operating portion for releasing the lock of the seat slide mechanism 26 with respect to the lateral side or at the rear of the seat back 24, the operability is further enhanced.
The seat reclining mechanism 30 is provided with rotary latches 30a, 30b, auxiliary spring brackets 30c, 30d, auxiliary springs 30e, 30f, a release lever 30g, a swing link 30h, a pivot stopper bracket 30i, attachment brackets 30j, 30k for engaging each outer end portion of the auxiliary springs 30e, 30f, and attachment brackets 30l, 30m for engaging each rotary latch 30a, 30 b.
The rotary latches 30a, 30b are mechanisms similar to recliners, and are attached between the attachment brackets 30l, 30m and the upper risers 29a, 29b, respectively, when the rotary latches are fixed to the seat side members 23a, 23b, respectively.
As shown in fig. 7A, 7B, the rotary latch 30B is provided with an inner rotor 30bi fixed to the attachment bracket 30m and an outer rotor 30bo fixed to the upper riser 29B. The rotary latch 30a is also similar. Typically, the rotary latch 30a is locked and its inner rotor does not rotate relative to its outer rotor. When the release lever 30g of the rotary latch 30a is operated, the lock is released and the inner rotor can rotate relative to the outer rotor. The lever of the rotary latch 30a and the lever 30br of the rotary latch 30b are connected and interlocked by a turning connecting rod 30 h. The swing link 30h is disposed between the front cross member 23c and the rear cross member 23 d.
Secondary spring supports 30c, 30d are attached to the outside of the respective upper risers 29a, 29 b. The inner ends of the auxiliary springs 30e, 30f are attached to the respective auxiliary spring brackets 30c, 30 d. The attachment brackets 30j, 30k are fixed to the respective attachment brackets 30l, 30 m. In order to apply a pressure to the seat side members 23a, 23b to rotate forward, the outer ends of the assist springs 30e, 30f are rotated rearward, and the outer ends are attached to the attachment brackets 30j, 30 k. The auxiliary springs 30e, 30f in the drawing show a state where the outer end portions thereof are not yet attached.
Stop brackets 27a, 27b for limiting rotation when the seat structure 21 is rotated rearward are attached to the respective upper risers 29a, 29 b. The stopper brackets 27a, 27b are provided with rubber bushes 27c, 27d, respectively, at positions against which the seat side members 23a, 23b abut.
In the seat reclining mechanism 30, the seat side members 23a, 23b are rotatably connected to the upper risers 29a, 29b, respectively. As a result, the seat structure 21 can be rotated in the forward direction 43 about the lateral axis 48.
As shown in fig. 6, the seat reclining mechanism 30 (the rotating connecting rod 30h as the drive shaft of the seat reclining mechanism 30) is disposed forward of a position where a line (line a-a) connecting the center of one side of the recliner 28 and the center of one side of the rear cross member 23d intersects a plane (the top surface of the upper rail 26 c) including the bottom of the upper riser 29a (L1> 0). When the seat reclining mechanism 30 is disposed near the front portion of each of the seat side members 23a, 23b, the distance from the center of gravity of the seat structure 21 increases and a large force is required to turn the seat structure 21. When the seat reclining mechanism 30 is disposed near the rear portion of each seat side member 23a, 23b, the distance from the drive shaft to the front end portion of each seat side member 23a, 23b is extended and different horizontal portions 2a of the floor panel 2 in front of the seat 14 need to be extended. Therefore, it is desirable that the seat reclining mechanism 30 is disposed slightly rearward of the center in the longitudinal direction of each seat side member 23a, 23 b. When the distance between the center of one side of the rear cross member 23d and the rotation center of the seat reclining mechanism 30 is L2 and the distance between the center of one side of the front cross member 23c and the rotation center of the seat reclining mechanism 30 is L3, (L2+ L3)/3< L2< (L2+ L3)/2, for example, is desirable.
Next, the operation of the seat structure will be described with reference to fig. 8 to 10. Fig. 8 is a side view showing a state where the seat structure is moved forward from the position shown in fig. 6. Fig. 9 is a side view showing a state where the seat structure is moved forward from the position shown in fig. 8. Fig. 10 is a perspective view showing the seat structure in the state shown in fig. 9, viewed from the rear side.
In the initial state shown in fig. 6, the seat structure 21 is located in the stand-up position in which the bottom of each seat side member 23a, 23b is parallel to the top surface of each upper rail 26c, 26 d. In this case, the seat back frame 25 is not tilted backward by the recliner 28. When the passenger operates the towel bar 26e, the locking of the upper rails 26c, 26d with respect to the corresponding lower rails 26a, 26b is released, and as shown in fig. 8, when the passenger presses the seat, the seat structure 21 moves forward. For example, the distance of movement is about 300 mm. When the passenger releases the towel bar 26e, the upper rails 26c, 26d are locked in the respective lower rails 26a, 26 b.
When the passenger operates the release lever 30g of the rotary latch 30a, the locking of the seat side members 23a, 23b with respect to the respective upper risers 29a, 29b is released, the seat structure 21 is turned forward to the inclined position as shown in fig. 9 by the pressure of the auxiliary springs 30e, 30f, and when the passenger releases the release lever 30g, the rotary latch 30a locks and fixes the seat structure 21. In this case, the bottom of the front portion of the seat side member 23a is located on the lower side of the bottom of the lower rail 26a, and the top surface of the front portion of the seat side member 23a is also located on the lower side of the bottom of the lower rail 26 a.
When the height from the top surface of the lower rail 26a to the center of the recliner 28a is H1 and the height to the center of the rear cross member 23d is H2 with the seat structure 21 in the upright position shown in fig. 6, H1< H3 and H2< H4 when the height from the top surface of the lower rail 26a to the center of the recliner 28a is H3 and the height to the center of the rear cross member 23d is H4 with the seat structure in the inclined position shown in fig. 9.
In this embodiment, the seat structure 21 is rotated approximately 50 degrees from the upright position shown in fig. 8. The child safety seat 40 rotates, for example, approximately 20 degrees when installed on the seat 14. The rotation may also be at a greater or lesser angle than this. At this time, the angle between the seat cushion frame 23 and the seat back frame 25 is maintained. The large degree of rotation speeds up the enhanced accessibility of the third row of seats 16 while accommodating the child safety seat 40.
When the passenger operates the release lever 30g and pulls the second-row seat 14 rearward after the passenger sits on the third-row seat 16, the seat structure 21 rotates rearward to return to the upright position shown in fig. 8, the seat structure abuts on the rubber bushes 27c, 27d of the stopper brackets 27a, 27b, and the seat structure stops. When the passenger releases the release lever 30g, the rotary latch 30a is locked and the seat structure 21 is fixed. Thereafter, when the passenger operates the operating portion of the seat slide mechanism 26 or operates the towel bar 26e and pulls the second-row seat 14 rearward, the second-row seat moves rearward and returns to the initial position shown in fig. 6.
Second embodiment
In the following description of the second embodiment, like reference numerals will be used for parts having a similar configuration and a similar function to those described in the above embodiments. In the description of such components, the description of the above embodiments may be appropriately referred to within a technically consistent range. In addition, some of the above-described embodiments can be applied with appropriate complexity within a technically consistent range.
Fig. 11 is a side view showing the vehicle inside in the second embodiment. Fig. 12 is a side view explaining the outline of the seat reclining mechanism of the second-row seat shown in fig. 11.
As shown in fig. 11, as in the first embodiment, a first-row seat 12, a second-row seat 14, and a third-row seat 16 are arranged on the floor 2 of the vehicle 1 in this order from the front side toward the rear side. Each row is provided with a plurality of seats; however, the seat on the right side of the vehicle will be described hereinafter.
As shown in fig. 12, the second-row seat 14 in the second embodiment is provided with a seat cushion 22 and a seat back 24 connected to the seat cushion 22. In addition, the second-row seat 14 is provided with a seat slide mechanism 26 for moving the seat cushion 22 and the seat back 24 in the longitudinal direction and a seat reclining mechanism 50 capable of tilting the seat cushion 22 and the seat back 24 forward. The seat reclining mechanism 50 is provided with a front-side link mechanism 51 for moving the seat cushion 22 and the seat back 24 in the longitudinal direction and a rear-side link mechanism 52 for swinging them vertically. Further, the seat reclining mechanism 50 maintains the angle between the seat cushion 22 and the seat back 24 during forward tilting. In such a configuration, even if the child safety seat 40 or the like is present on the second-row seat 14, the second-row seat 14 can be tilted forward and can also be moved in the longitudinal direction by the seat slide mechanism 26, as in the first embodiment. Thereby, the similar effect to that in the first embodiment is produced.
As shown in fig. 12, the second-row seat 14 is moved in the forward direction 41 by the seat slide mechanism 26, and is tilted forward from the initial position 42 to the position shown in fig. 12 by the seat reclining mechanism 50. As in the first embodiment, to gain access to the third row of seats 16, the occupant operates a release mechanism (towel bar, other and later described release levers, respectively) of the second row of seats 14. Thereby, the second-row seat 14 moves in the forward direction 41 and can be tilted in the direction 43. As a result, as the size of the area between the second row seat 14 and the third row seat 16 increases, access to the third row seat 16 is accelerated. Furthermore, because the angle between the seat back 24 and the seat cushion 22 remains substantially constant as the second row seat 14 reclines, the seat recline mechanism 50 may enhance accessibility to the third row seat 16 by expanding the space at the rear of the second row seat 14 independent of the presence of the child safety seat 40. When an occupant sits on the third row seat 16, the second row seat 14 can swing and move back to the original position 42, thereby maintaining the comfort of the occupant in the second row seat 14.
Next, the seat structure will be described with reference to fig. 13 to 17. Fig. 13 is a perspective view showing a seat structure of the second-row seat shown in fig. 11, viewed from the front side. Fig. 14 is a perspective view showing a state in which the seat structure shown in fig. 13 is tilted as viewed from the rear side. Fig. 15 is a perspective view showing the seat structure shown in fig. 14 viewed from the front side. Fig. 16 is a perspective view showing the seat structure shown in fig. 14, viewed from the front side. Fig. 17 explains the relationship between the front and rear side link mechanisms of the second-row seat shown in fig. 13.
The seat structure 21 of the second-row seat 14 is provided with a seat cushion frame 23 and a seat back frame 25, and the seat structure is attached to a seat slide mechanism 26. The seat slide mechanism 26 enables the seat structure 21 to move in the longitudinal direction along the forward direction 41. The seat reclining mechanism 50 enables the seat structure 21 to swing along the seat slide mechanism 26.
The seat cushion 22 includes a seat cushion frame 23, a cushion, and a cover. The seat back 24 also has a similar configuration, and is configured by a seat cushion fixed to a seat back frame 25 and wrapped in a cover.
As in the first embodiment, the seat cushion frame 23 is provided with seat side members 23a, 23b, a front cross member 23c connected to the front sides of the seat side members 23a, 23b, a rear cross member 23d connected to the rear sides of the seat side members 23a, 23b, and recliner brackets 23e, 23f connected to the rear sides of the seat side members 23a, 23 b.
As in the first embodiment, the seat back frame 25 is provided with rear vertical tubes 25a, 25b, an upper cross member 25c connected to upper sides of the rear vertical tubes 25a, 25b, brackets 25d, 25e connected to lower sides of the rear vertical tubes 25a, 25b, and a lower cross member 25f connected to the brackets 25d, 25 e.
The seat structure 21 is provided with a recliner mechanism 28 for rotating the seat back frame 25 on the basis of the seat cushion frame 23. The construction and operation of the recliner mechanism 28 is similar to that of the first embodiment.
As in the first embodiment, the second-row seat 14 includes upper risers 29a, 29b for supporting the seat cushion frame 23. The bottom sides of the upper risers 29a, 29b are fixed to the upper rails 26c, 26d of the seat slide mechanism 26 by bolts or other fixing members, respectively. The configuration and operation of the seat slide mechanism 26 are similar to those in the first embodiment.
As shown in fig. 14 to 16, the seat structure 21 is coupled to the upper risers 29a, 29b by a front linkage 51 and a rear linkage 52. The front link mechanism 51 is provided with two links, with the link 51a provided on the right front side of the seat cushion frame 23 and the link 51b provided on the left front side. Further, one end sides of the links 51a, 51b are rotatably connected to the respective upper risers 29a, 29b through the rods 51c, 51d, while the other end sides of the links 51a, 51b are rotatably connected to the front cross member 23c of the seat cushion frame 23. The axis of the rotational shaft of each link 51a, 51b is equivalent to the vehicle width direction.
The rear link mechanism 52 is provided with two links, a link 52a provided on the right rear side of the seat cushion frame 23, and a link 52b provided on the left rear side. Further, one end sides of the links 52a, 52b are rotatably connected to the respective upper risers 29a, 29b by the respective rotary latches 52c, 52d as handles, while the other end sides of the links 52a, 52b are rotatably connected by the rear cross member 23d of the seat cushion frame 23. The axis of the rotational shaft of each link 52a, 52b is equivalent to the vehicle width direction.
The rotary latches 52c, 52d are similar mechanisms to the rotary latches 30a, 30b in the first embodiment, and are attached between the respective links 52a, 52b and the respective upper risers 29a, 29 b. To apply forward rotational pressure to the seat side members 23a, 23b, an auxiliary spring (not shown) similar to that in the first embodiment is attached.
As shown in fig. 17, the angle between a straight line SL1 connecting the centers of the respective rods 51c, 51d of the links 51a, 51b and the center of the front cross member 23c when the seat structure 21 is in the stand-up position shown in fig. 13 and a straight line SL2 connecting the centers of the respective rods 51c, 51d of the links 51a, 51b and the center of the front cross member 23c when the seat structure 21 is in the inclined position shown in fig. 18 should be θ f. In addition, the angle between a line SL3 connecting the centers of the respective rotary latches 52c, 52d as the handles of the links 52a, 52b and the center of the rear cross member 23d when the seat structure 21 is in the upright position shown in fig. 13 and a line SL4 connecting the centers of the respective rotary latches 52c, 52d as the handles of the links 52a, 52b and the center of the rear cross member 23d when the seat structure 21 is in the reclined position shown in fig. 14 should be θ r. Further, each length of the straight lines SL1, SL2 should be Lf, and each length of the straight lines SL3, SL4 should be Lr. The front and rear link mechanisms have a relationship of "θ f > θ r, θ f being about 90 °, and Lf < Lr".
Next, the operation of the seat structure will be described with reference to fig. 18, 19. Fig. 18 is a side view showing the seat structure shown in fig. 13. Fig. 19 is a side view showing a state where the seat structure is moved forward and tilted from the position shown in fig. 17.
In the initial position shown in fig. 18, the seat structure 21 is in the stand-up position, in which the respective bottoms of the seat side members 23a, 23b are parallel to the top surfaces of the respective upper rails 26a, 26 b. In this case, the seat back frame 25 is not tilted backward by the recliner 28. The links 51a, 51b in the upright position of the seat structure 21 are oriented in a substantially vertical direction as shown in side view along a line connecting the center of the front cross member 23c and the center of the rod 51 c. The links 52a, 52b in the upright position of the seat structure 21 are oriented in a direction in side view with the base horizontal as shown by the line connecting the center of the rear cross member 23d and the center of the respective rotary latch 52c, 52 d. The longitudinal distance between the center of the rear cross member 23d and the center of the rotary latches 52c, 52d should be L4. As in the first embodiment, when the towel bar 26e is operated by the passenger, the locking of the upper rails 26c, 26d with respect to the respective lower rails 26a, 26b is released, and when the passenger presses the seat, the seat structure 21 moves forward. When the passenger releases the towel bar 26e, the upper rails 26c, 26d are locked in the respective lower rails 26a, 26 b.
When the passenger operates a release lever (not shown) of the rotary latch 52c, the locking of the links 52a, 52b with respect to the respective upper risers 29a, 29b is released, the seat structure 21 is tilted forward by the pressure of the assist spring (not shown), the seat structure is tilted to the tilted position shown in fig. 19, the rotary latch 52c locks the seat structure, and the seat structure 21 is fixed. The rear cross member 23d swings upward and the front cross member 23c swings forward. When the longitudinal distance between the center of the rear cross member 23d and the center of the rotary latches 52c, 52d is L5 in side view, L5< L4 and L4 is approximately Lr. Additionally, when the longitudinal distance between the center of the front cross member 23c and the center of the rods 51c, 51d is L6, L6 is substantially 0, being the smallest in the upright position shown in FIG. 18, and L6 being the longest in the inclined position shown in FIG. 19.
When the height from the top surface of the upper rail 26a to the center of the recliner 28 is H5 and the height from the top surface of the upper rail to the center of the rear cross member 23d is H6 with the seat structure 21 in the upright position shown in fig. 18, H5< H7 and H6< H8 when the height from the top surface of the upper rail 26a to the center of the recliner 28 is H7 and the height from the top surface of the upper rail to the center of the rear cross member 23d is H8 with the seat structure in the inclined position shown in fig. 19.
In this case, the bottom of the front portion of the seat side members 23a, 23b is located at a position lower than the top surface of the respective upper rails 26c, 26 d. In addition, the bottom of the front portion of the seat side member is located higher than the bottom of the corresponding lower rail 26a, 26 b. Therefore, as in the second embodiment, even if there is no different horizontal portion in front of the second-row seats 14, the seat structure 21 can be tilted. At this time, the angle between the seat cushion frame 23 and the seat back frame 25 is maintained. The large angle of inclination accelerates the enhanced accessibility of the third row seat 16 while accommodating the child safety seat 40.
When the passenger sits on the third-row seat 16, the release lever is operated and the second-row seat 14 is pulled rearward, the seat structure 21 swings rearward to return to the upright position shown in fig. 18, the rear cross member 23d abuts on the upper risers 29a, 29b, and the seat structure stops. When the passenger releases the release lever, the rotary latch 52c is locked and the seat structure 21 is fixed. Thereafter, when the passenger operates the operating portion of the seat slide mechanism 26 or operates the towel bar 26e and pulls the second-row seat 14 rearward, the second-row seat moves rearward and returns to the initial position shown in fig. 18.
The present invention made by these inventors has been described based on specific embodiments; however, it is needless to say that the present invention is not limited to the above-described embodiments and may be changed.
For example, in an embodiment, a vehicle is provided with three rows of seats; however, the vehicle may also be provided with more rows of seats than three. In addition, when the vehicle is provided with two rows of seats of a front row seat and a rear row seat, a seat reclining mechanism may be provided on the front row seat.
Further, in the embodiment, an example of moving the seat structure 21 by operating the towel bar 26e is described; however, the seat structure 21 may also be moved by operating the slide release lever via a cable.
In addition, in the embodiment, an example in which the rotary latches 30a, 30b are interlocked by the turning connecting rod 30h is described; however, the rotary latches 30a, 30b may also be interlocked by a lever and cable.
