Vehicle seat

Abstract

To provide a vehicle seat which can standardize the seat surface position of a seated person by achieving commonality of a seat frame. [Solution] The vehicle seat is equipped with a tilt device that can adjust the height position of a portion of the cushion frame. The vehicle seat includes side frames (11) arranged on the left and right sides in the seat width direction, a pan frame (12) that spans between the left and right side frames (11), and a tilt bracket (20) that is interposed between the connecting portions of the side frames (11) and the pan frame (12) and supports the pan frame (12). A storage recess (113) for storing the tilt bracket (20) is formed in the support surface of the connecting portion of the side frame (11) that supports the pan frame (12).

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a tilt device that can adjust the height position of a portion of a cushion frame that forms the framework of the seating portion. [Background technology]

[0002] 2. Description of the Related Art Vehicle seats are known that include a tilt device that can adjust the height position of a plate-shaped pan frame that forms a front portion of a cushion frame. Various techniques have been proposed for ensuring the assembly rigidity of the tilt device and for smoothly adjusting the height position of the pan frame using the tilt device (see, for example, Patent Documents 1 and 2).

[0003] In the vehicle seat with a tilt device described in Patent Document 1, the cushion frame comprises lower frames arranged on the left and right sides and a cushion pan frame that spans the front portions of the left and right lower frames, and further comprises a tilt bracket that is rotatably attached to the lower frames and can raise and lower the cushion pan frame by rotating in the vertical direction. The shape of the tilt bracket is devised to improve the bending rigidity of the tilt bracket.

[0004] The vehicle seat with a tilt device described in Patent Document 2 also has a similar configuration, and takes into consideration the seating position of the occupant when determining the position of the rotation center axis of the tilt bracket. This allows for smooth adjustment of the pan frame height using the tilt device. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-129280 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-195597 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, if vehicle seats with tilt devices such as those disclosed in Patent Documents 1 and 2 could share a frame with vehicle seats that do not have tilt devices, this would lead to cost reductions and more efficient assembly work. Furthermore, in aiming to share the frame, if the seating position of the occupant can be unified regardless of whether or not a tilt device is installed, it will be possible to share parts across the entire seat, which will also provide a good seating experience for the occupant. Therefore, there has been a demand for a vehicle seat, particularly a vehicle seat with a tilt device, that allows the seat frame to be shared regardless of the specifications or type of vehicle seat.

[0007] Furthermore, in vehicle seats with tilt devices such as those described in Patent Documents 1 and 2, there was a demand for a device that further improved the assembly rigidity of the tilt device and achieved a compact arrangement by devising an assembly position for the tilt device.

[0008] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a vehicle seat that can share a seat frame regardless of the specifications or type of vehicle seat. Another object of the present invention is to provide a vehicle seat that allows the seating position of the seated person to be unified regardless of whether or not a tilt device is provided, in order to aim for commonality of the seat frame. Another object of the present invention is to provide a vehicle seat in which the assembly rigidity of the tilt device is improved and a compact arrangement of the tilt device is realized. [Means for solving the problem]

[0009] The above-mentioned problem is solved by the vehicle seat of the present invention, which includes a cushion frame that forms the framework of the seating portion, and the cushion frame has side frames that are arranged on the left and right sides in the seat width direction and extend in the front-rear direction of the seat, and a plate-shaped pan frame that is bridged between the left and right side frames, and a support bracket for supporting the pan frame is interposed between the connecting parts of the side frames and the pan frame, and a storage recess for storing the support bracket is formed at a predetermined position on a support surface of the side frame that supports the pan frame at the connecting part. The storage recess includes a first storage recess formed on the upper surface of the side frame and a second storage recess formed on the side surface of the side frame adjacent to the first storage recess, and a through hole is formed in a portion of the side frame different from the portion where the first storage recess is formed in the seat front-rear direction. This is solved by: As described above, the support surface of the side frame that supports the pan frame has a storage recess formed at a predetermined position for storing the support bracket, so even if the support bracket needs to be removed depending on the specifications or type of vehicle seat, the frame can be shared without changing the assembly position of the entire seat frame. Furthermore, the seat position of the seated person can be unified regardless of whether or not the support bracket is present. Furthermore, by forming recesses at predetermined positions in the connecting portions of the side frames, it is possible to expect an improvement in the rigidity of the side frames. Furthermore, with the above-described configuration, the support bracket can be stored in the first and second storage recesses, allowing the support bracket to be arranged compactly in the vertical direction and the seat width direction. Furthermore, by devising the position of the through hole as described above, it is possible to suppress a decrease in rigidity of the side frame around the storage recess.

[0010] In this case, the support bracket may be a tilt bracket that is rotatably attached to the side frame and rotates up and down to raise and lower the pan frame. The above configuration makes it possible to realize a vehicle seat that allows the seating position of the seated person to be unified regardless of whether or not a tilt bracket (tilt device) is provided. Furthermore, by storing the tilt bracket in the storage recess, a compact arrangement of the tilt bracket (tilt device) can be achieved.

[0011] At this time, the above No. 1The storage recess is formed on the upper surface of the side frame that becomes the support surface, and the end portion of the pan frame in the seat width direction is in contact with the support surface in the up-down direction. No. 1 It is preferable that the support bracket be disposed in a position where it can come into contact with the upper surface of the support bracket housed in the housing recess. With the above configuration, the pan frame is supported in the vertical direction by both the side frames and the support brackets, thereby improving the assembly rigidity of the pan frame.

[0012] At this time, the above No. 1 Preferably, a plurality of storage recesses are formed at predetermined intervals in the seat front-rear direction and are arranged alternately with the support surfaces. With the above-described configuration, even when the support brackets are removed in accordance with the specifications of the vehicle seat, the pan frame is supported in a well-balanced manner by the side frames. Furthermore, since a plurality of storage recesses are formed at intervals, the support bracket can be stored in each storage recess and assembled, thereby increasing the assembly rigidity of the support bracket.

[0013] In this case, the support bracket has an upper wall portion that is placed on the upper surface of the side frame, and a side wall portion that bends downward from the end portion of the upper wall portion in the seat width direction and extends while facing the side surface of the side frame, and the rear portion of the side wall portion is preferably attached to the side surface of the side frame via a rotating shaft. With the above configuration, the support bracket has a shape that conforms to the side frame, which increases the assembly rigidity of the support bracket to the side frame.

[0014] At this time, The first storage recess stores the upper wall portion of the support bracket, and the second storage recess stores the side wall portion of the support bracket, and when the support bracket is stored in the storage recess, the upper surface of the support bracket and the upper surface of the side frame are flush with each other. and good 。

[0015] In this case, it is preferable that the portion of the side wall portion that is attached to the side frame via the rotation shaft is positioned at a different position in the fore-and-aft direction of the seat from the portion of the side frame in which the storage recess is formed. With the above configuration, it is easier to ensure an area on the side surface of the side frame for the portion to which the support bracket is attached, thereby increasing the assembly rigidity of the support bracket.

[0016] In this case, it is preferable that the side wall portion extends while facing the outer surface of the side frame in the seat width direction. With the above configuration, when a seating load is applied to the pan frame, the support bracket and side frame can stably support the pan frame.

[0018] At this time, The through hole extends downward from the second storage recess of the side frame along the frame body of the side frame. and good 。

[0019] In this case, an opening hole penetrating in the vertical direction is formed at a predetermined position of the connecting portion of the pan frame, and the portion where the opening hole is formed is preferably positioned at a different position in the fore-and-aft direction of the seat from the portion of the support surface of the side frame where the storage recess is formed. With the above configuration, for example, if the support bracket (tilt bracket) is not required depending on the specifications, the pan frame and the side frame can be easily joined together with adhesive or welding by utilizing the opening holes in the pan frame. Also With the above configuration For example, even if a tilt bracket is attached, the tilt bracket can stably raise and lower the pan frame. It is also preferable that the seat cushion includes the cushion frame, the cushion material, and the cover material, a back frame that forms the skeleton of the backrest portion, a seat back that includes the cushion material and the cover material, and a reclining device that rotatably connects the seat back to the seat cushion. [Effects of the Invention]

[0020] Book According to the invention, even if the support bracket is removed depending on the specifications and type of vehicle seat, the frame can be shared without changing the assembly position of the entire seat frame. Furthermore, the seat position of the seated person can be unified regardless of whether the support bracket is present or not. Furthermore, the rigidity of the side frame can be expected to be improved. Also a bookAccording to the present invention, the seat position of the seated person can be unified regardless of whether or not a tilt bracket (tilt device) is used, and the tilt device can be arranged compactly. Also a book According to the invention, the assembly rigidity of the pan frame is improved. Furthermore, according to the present invention, even when the support brackets are removed depending on the specifications of the vehicle seat, the pan frame is supported by the side frames in a well-balanced manner, and the assembly rigidity of the support brackets is increased. Furthermore, according to the present invention, the support bracket can be arranged compactly in the vertical direction and the seat width direction. Furthermore, according to the present invention, the assembly rigidity of the support bracket can be increased. Furthermore, according to the present invention, the support bracket and the side frame can stably support the pan frame. Furthermore, according to the present invention, the tilt device can be arranged compactly. Furthermore, according to the present invention, it is possible to suppress a decrease in rigidity around the storage recess of the side frame. Furthermore, according to the present invention, if tilt brackets are not required depending on the specifications, the openings in the pan frame can be used to easily join the pan frame and side frames with adhesive, etc. Furthermore, even in specifications with tilt brackets, the tilt brackets can stably raise and lower the pan frame. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view of a vehicle seat according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view of a seat frame that serves as a framework of the vehicle seat. [Figure 3] FIG. 10 is a perspective view of the seat frame, showing a raised position in which the pan frame has moved upward relative to the side frames. [Figure 4] FIG. 3 is an enlarged view of the main part of FIG. 2, showing a perspective view of a connecting portion between a pan frame and a side frame. [Figure 5] FIG. 2 is an exploded perspective view showing the connecting portion between the pan frame and the side frame. [Figure 6] 6 is a cross-sectional view taken along the line VI-VI in FIG. 3, illustrating the details of the tilt device. DETAILED DESCRIPTION OF THE INVENTION

[0024] A vehicle seat according to an embodiment of the present invention will be described below with reference to FIGS. This embodiment relates to an invention of a vehicle seat equipped with a tilt device that can adjust the height position of a portion of the cushion frame, and which comprises side frames arranged on the left and right sides of the seat width direction, a pan frame that is spanned between the left and right side frames, and a tilt bracket that is interposed between the connecting parts of the side frames and the pan frame and supports the pan frame, and which is characterized in that a storage recess for storing the tilt bracket is formed on the support surface of the connecting part of the side frame that supports the pan frame. The side of the seat back of the vehicle seat on which the occupant sits is the front side of the seat.

[0025] The vehicle seat S of this embodiment is mainly composed of a seat body having a seat cushion 1 and a seat back 2, as shown in Figure 1, a reclining device 3 that rotatably connects the seat back 2 to the seat cushion 1, as shown in Figure 2, a height link device 4 that connects the seat body so that it can be raised and lowered, and a tilt device 30 that can adjust the height position of the front part of the seat cushion 1, as shown in Figure 3.

[0026] As shown in FIG. 1, the seat cushion 1 is a seating portion that supports the occupant from below, and is configured by placing a cushion material 1a on a cushion frame 10 shown in FIG. 2, which serves as the skeleton, and covering it with a skin material 1b. The seat back 2 is a backrest portion that supports the back of the occupant from behind, and is configured by placing a cushion pad 2a on a back frame that serves as a skeleton, and covering the cushion pad 2a with a skin material 2b.

[0027] As shown in Figure 2, the cushion frame 10 is a roughly rectangular frame-like body and is mainly composed of side frames 11 arranged on the left and right sides, a pan frame 12 that is bridged between the front portions of the left and right side frames 11, a pipe-shaped rear frame 13 that connects the rear portions of the left and right side frames 11, and a plurality of elastic springs 14 that are bridged between the pan frame 12 and the rear frame 13 and extend in a snake-like shape.

[0028] The side frame 11 is made of a sheet metal member having a generally I-shaped vertical cross section, extends in the front-rear direction of the seat, and has a pan frame 12 attached to its front portion. The pan frame 12 is a frame that supports the thighs of a seated person and consists of a roughly rectangular plate body, with the left and right end portions 12a in the seat width direction placed and attached to the upper surface of the side frame 11. As shown in FIGS. 3 and 4, a tilt bracket 20 for supporting the pan frame 12 is attached between the connecting portion of the side frame 11 and the pan frame 12. As shown in FIG. 3, a tilt device 30 capable of adjusting the height position of the pan frame 12 is provided between the left and right side frames 11 in the seat width direction.

[0029] As shown in Figures 4 and 5, the side frame 11 is mainly composed of a frame main body 110, an upper end flange 111 that bends and protrudes inward in the seat width direction from the upper end portion of the frame main body 110, and a lower end flange 112 that bends and protrudes inward in the seat width direction from the lower end portion of the frame main body 110. As shown in FIG. 5, a storage recess 113 for storing the tilt bracket 20 is formed in the connecting portion of the side frame 11 with the pan frame 12. The storage recess 113 is formed on the upper end flange 111 of the side frame 11, which serves as the support surface for the pan frame 12, and is equipped with a first storage recess 113a for storing a portion of the tilt bracket 20, and a second storage recess 113b formed on the side of the frame main body 110, for storing a portion of the tilt bracket 20. A plurality of first storage recesses 113a are formed at predetermined intervals in the front-rear direction of the seat, and are arranged so as to alternate with the convex portions of the upper end flange 111. The first storage recesses 113a and the second storage recesses 113b are arranged adjacent to each other.

[0030] As shown in Figures 4 and 5, the tilt bracket 20 is a roughly L-shaped plate body that is rotatably attached to the side of the side frame 11 and is a support bracket that moves up and down by rotating in the vertical direction to raise and lower the pan frame 12. As shown in Figure 5, the tilt bracket 20 comprises an upper wall portion 21 that is placed on the upper surface of the upper end flange 111 of the side frame 11, and a side wall portion 22 that bends downward from the outer end of the upper wall portion 21 and extends opposite the outer surface of the main frame 1110.

[0031] The upper wall portion 21 is a substantially rectangular plate portion, and multiple portions are formed at predetermined intervals in the front-to-rear direction of the seat, and are each stored in a first storage recess 113a formed in the upper end flange 111. The upper surface of the upper wall portion 21 and the upper surface of the upper end flange 111 are disposed so as to be substantially flush with each other, and are formed as support surfaces that can come into contact with the left and right end portions 12a of the pan frame 12, respectively. The upper surface of the upper wall portion 21 and the left and right end portions 12a of the pan frame 12 are joined by laser welding.

[0032] As shown in FIGS. 4 and 5, the side wall portion 22 is a plate portion that is long in the front-rear direction of the seat, and is stored in a second storage recess 113b formed in the frame main body 110. The rear portion of the side wall portion 22 is attached to the outer surface of the frame main body 110 via a rotating shaft 23, and the front portion of the side wall portion 22 is attached to a drive link 36 (described later) via a connecting pin 24. The portion of the side wall 22 to which the connecting pin 24 (drive link 36) is attached is offset so as to protrude outward in the seat width direction. This allows space to be formed between the side frame 11 and the tilt bracket 20, allowing other components to be compactly arranged in this space. This also increases the rigidity of this portion of the side wall 22.

[0033] The tilt device 30 is a device that can adjust the height position of the pan frame 12 between a normal position shown in FIG. 2 and a raised position shown in FIG. In detail, as shown in FIG. 3, the tilt device 30 is a device that can raise and lower the pan frame 12 by rotating the tilt bracket 20 in the vertical direction relative to the side frame 11, and is attached to the inner surface of the side frame 11 in the seat width direction.

[0034] As shown in Figure 6, the tilt device 30 is mainly composed of a drive unit 31 which is the main body of the tilt device 30, a pinion gear 32 which is rotatably attached to the drive unit 31, a sector gear 34 whose tip meshes with the pinion gear 32 as a gear and whose end is attached to the inner surface of the side frame 11 via a rotating shaft 33, and a drive link 36 which has one end attached to the outer surface of the sector gear 34 via a rotating pin 35 and the other end passing through a through hole 114 formed in the side surface of the side frame 11, bending and protruding outward, and attached to the side wall portion 22 of the tilt bracket 20.

[0035] The operation of the tilt device 30 to move the pan frame 12 from the normal position shown in FIG. 2 to the raised position shown in FIG. 3 will be described with reference to FIG. In the tilt device 30, first, the pinion gear 32 rotates around an axis along the seat width direction in accordance with the driving operation of the drive unit 31. In accordance with the rotational operation of the pinion gear 32, the sector gear 34 rotates upward around the rotation shaft 33. As the sector gear 34 rotates upward, the bent drive link 36 connected to the sector gear 34 via the rotation pin 35 moves upward. As the drive link 36 moves upward, the tilt bracket 20 connected to the drive link 36 via the connection pin 24 rotates upward around the rotation shaft 23. As a result, the pan frame 12 together with the tilt bracket 20 can be rotated and moved from the normal position to the raised position.

[0036] In the above configuration, as shown in FIG. 5, the left and right end portions 12a of the pan frame 12 are formed with a first convex bead 12b extending in the seat front-rear direction along the tilt bracket 20, and a second convex bead 12c extending in a direction perpendicular to the first convex bead 12b (seat width direction) and positioned corresponding to each upper wall portion 21 of the tilt bracket 20. Therefore, the first convex bead 12b can ensure frame rigidity at the connecting portion of the pan frame 12 with the side frame 11 and the connecting portion with the tilt bracket 20. Furthermore, each of the second convex beads 12c can further ensure frame rigidity at the connection portion of the pan frame 12 with the tilt bracket 20 (upper wall portion 21).

[0037] In the above configuration, as shown in FIG. 5, three opening holes 12d are provided at predetermined intervals along the side frame 11 in the left and right end portions 12a of the pan frame 12, avoiding the convex beads 12b and 12c, and penetrate in the vertical direction. The portion where the opening hole is formed is disposed in a position on the upper surface (support surface) of the side frame 11 in the seat front-rear direction, avoiding the portion where the first storage recess is formed. Therefore, if the tilt bracket 20 is not required for the vehicle seat specifications, the pan frame 12 and the side frame 11 can be easily joined with an adhesive or the like by utilizing the opening holes in the pan frame 12. Furthermore, even if the specifications require the tilt bracket 20 to be attached, the tilt bracket 20 can stably support the pan frame 12.

[0038] In the above configuration, as shown in FIG. 5, the portion of the side frame 11 where the through hole 114 is formed is located at a position that avoids the portion where the first storage recess is formed in the seat front-rear direction. Therefore, the frame rigidity of the side frame 11 around the first storage recess, which is the portion on which the upper wall portion 21 of the tilt bracket 20 is placed, can be ensured.

[0039] In the above configuration, as shown in FIG. 5, the portion of the side wall portion 22 of the tilt bracket 20 that is attached to the side frame 11 via the rotation shaft 23 is positioned in a position that avoids the portion of the side frame 11 where the first storage recess is formed in the seat front-rear direction. Therefore, it is easy to ensure an area on the side surface of the side frame 11 for mounting the tilt bracket 20, and the frame rigidity of the tilt bracket 20 can be ensured.

[0040] <Other embodiments> In the above embodiment, as shown in FIG. 3, the vehicle seat S is a seat equipped with a tilt device 30, and a tilt bracket 20 is attached between the connecting portion of the side frame 11 and the pan frame 12, but this can be modified without any particular limitation. For example, the seat may not be provided with the tilt device 30, and a support bracket may be attached between the connecting portions to simply reinforce and support the pan frame 12.

[0041] In the above embodiment, as shown in FIG. 5, the left and right end portions 12a of the pan frame 12 are supported and connected to the upper surfaces of the side frames 11 and the tilt brackets 20, but this can be modified without any particular limitation. For example, the left and right end portions 12a of the pan frame 12 may extend to the outer surfaces of the side frames 11 and be supported and connected to the outer surfaces of the side frames 11 and the outer surfaces of the tilt brackets 20.

[0042] In the above embodiment, a vehicle seat used in an automobile was described as a specific example, but the present invention is not limited to this and can also be used as a vehicle seat for trains, buses, etc., as well as for airplanes, ships, etc.

[0043] In the present embodiment, the vehicle seat according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention naturally includes equivalents thereof. [Explanation of symbols]

[0044] S vehicle seat 1 seat cushion 1a,2a cushion pad 1b,2b Skin material 2 seat backs 3 Reclining device 4 Height link device 10 Cushion Frame 11 Side frame 12 Pan Frame 12a Left and right ends 12b First convex bead 12c Second convex bead 12d opening hole 13 Rear frame 14 Elastic Spring 20 Tilt bracket 21 Upper wall 22 Side wall 23 Rotation axis 24 connecting pin 30 Tilt device 31 Drive unit 32 Pinion gear 33 Rotating shaft 34 Sector Gear 35 Pivot pin 36 Drive link 110 Frame body 111 Upper flange 112 Lower flange 113 Storage recess 113a First storage recess 113b Second storage recess 114 through hole

Claims

1. It is equipped with a cushion frame that forms the framework of the seating area. The cushion frame includes side frames disposed on the left and right sides in the seat width direction and extending in the seat front-rear direction, and a plate-shaped pan frame that is bridged between the left and right side frames. A support bracket for supporting the pan frame is interposed between the connecting portion between the side frame and the pan frame, A storage recess for storing the support bracket is formed at a predetermined position on a support surface of the side frame for supporting the pan frame at the connecting portion, The storage recess includes a first storage recess formed in an upper surface of the side frame, and a second storage recess provided adjacent to the first storage recess and formed in a side surface of the side frame, The vehicle seat, wherein a through hole is formed in a portion of the side frame different from a portion in the front-rear direction of the seat where the first storage recess is formed.

2. 2. The vehicle seat according to claim 1, wherein the support bracket is a tilt bracket that is rotatably attached to the side frame and rotates and moves in an up-down direction to raise and lower the pan frame.

3. The first storage recess is formed in an upper surface of the side frame that serves as the support surface, A vehicle seat as described in claim 1 or 2, characterized in that an end portion of the pan frame in the seat width direction is positioned in a position where it can abut against the support surface and the upper surface of the support bracket stored in the first storage recess in the vertical direction.

4. The vehicle seat according to claim 3, wherein the first storage recesses are formed in a plurality of positions at predetermined intervals in the seat front-rear direction and are arranged so as to be alternately aligned with the support surfaces.

5. the support bracket has an upper wall portion placed on an upper surface of the side frame, and a side wall portion bent downward from an end portion of the upper wall portion in a seat width direction and extending while facing a side surface of the side frame, 5. The vehicle seat according to claim 3, wherein a rear portion of the side wall is attached to a side surface of the side frame via a rotation shaft.

6. the first storage recess stores the upper wall portion of the support bracket; the second storage recess stores the side wall portion of the support bracket; 6. The vehicle seat according to claim 5, wherein an upper surface of the support bracket is flush with an upper surface of the side frame when the support bracket is stored in the storage recess.

7. 7. The vehicle seat according to claim 5, wherein a portion of the side wall portion that is attached to the side frame via the rotation shaft is positioned at a different position in the seat front-rear direction from a portion of the side frame in which the storage recess is formed.

8. 8. The vehicle seat according to claim 5, wherein the side wall portion extends in a seat width direction while facing an outer surface of the side frame.

9. 9. The vehicle seat according to claim 1, wherein the through hole extends downward from the second storage recess of the side frame along a frame main body of the side frame.

10. An opening hole penetrating in the vertical direction is formed at a predetermined position of the connecting portion of the pan frame, The vehicle seat according to claim 9, characterized in that the portion in which the opening hole is formed is located at a position on the support surface of the side frame different from a portion in which the storage recess is formed in the seat front-rear direction.

11. A seat cushion having the cushion frame, a cushion material, and a cover material; a seat back having a back frame that forms the framework of a backrest, a cushion material, and a cover material; 11. The vehicle seat according to claim 1, further comprising a reclining device that rotatably connects the seat back to the seat cushion.

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