Vehicle seats

Abstract

To provide a vehicle seat capable of efficiently assembling a seat frame.SOLUTION: A vehicle seat comprises a cushion frame 20. The cushion frame 20 comprises a side frames 21 disposed at right-and-left lateral parts in a seat width direction, and a pan frame 30 (connection frame) connecting right-and-left side frames 21. The side frames 21 have the engaging protrusions 40 (engagement parts) which engage with engagement recesses 50 (engaged parts) provided on the pan frame 30 to position the frame 30. The engaging protrusions 40 are formed in a manner to protrude toward the recesses 50 in a facing direction (vertical direction) of the pan frame 30 and the side frame 21. The recesses 50 engage with the engaging protrusions 40 by contact with the engaging protrusions 40 in a cross direction crossing the facing direction.SELECTED DRAWING: Figure 3

Description

Technical Field

[0005] ,

[0001] The present invention relates to a vehicle seat, and particularly to a vehicle seat provided with a cushion frame serving as a skeleton of a seat cushion.

Background Art

[0002] Conventionally, as described in Patent Document 1, there is known a vehicle seat provided with a cushion frame, the cushion frame having side frames disposed on the left and right sides and a plate-like pan frame installed at the front portions of the left and right side frames. At this time, the plate-like pan frame is connected to the left and right side frames by fastening rivets (attachment bolts) in a state where both left and right ends of the pan frame are respectively in contact with the upper surfaces of the left and right side frames.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a vehicle seat such as that of Patent Document 1, it has been demanded to make the assembly work of the seat frame (particularly the cushion frame) more efficient. For example, when connecting a pan frame (the other frame) to the left and right side frames (one frame), it has been demanded to reduce the man-hours of the frame assembly work by facilitating the position adjustment of both frames. Also, for example, it has been demanded to make the assembly work more efficient by reducing the number of components of the seat frame.

[0005] This invention has been made in view of the above-mentioned problems, and the object of this invention is to provide a vehicle seat that can streamline the assembly work of the seat frame which forms the skeleton. Another object of the present invention is to provide a vehicle seat that can streamline assembly work by reducing the number of components in the seat frame. [Means for solving the problem]

[0006] The aforementioned problem is solved by the vehicle seat of the present invention, which comprises a vehicle seat having a seat frame that forms the skeleton, the seat frame comprising side frames arranged on the left and right sides in the seat width direction, and a connecting frame that connects the left and right side frames, the side frames having engaging portions that engage with engaged portions provided on the connecting frame and position the connecting frame, one of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other, and the other side engages with the one by abutting against the one in an intersecting direction that intersects with the opposing direction. The engaging portion is formed at the outer end of the side frame in the seat width direction, and the engaged portion is formed at the outer end of the connecting frame in the seat width direction, and the engaging portion and the engaged portion are exposed on the outside of the seat frame in the seat width direction. This will resolve the issue. The above configuration makes it possible to create a vehicle seat that streamlines the assembly process of the seat frame. More specifically, by engaging the engaged portion of the connecting frame with the engaged portion of the side frame in the opposing direction of the side frame and the connecting frame, the positioning of both frames can be easily performed in an intersecting direction that intersects with the opposing direction. Furthermore, because positioning can be easily performed, the man-hours required for assembling both frames can be reduced. Furthermore, the above configuration allows for easy confirmation of the engagement state of the engaging and engaged parts during the assembly of the seat frame. Therefore, the assembly of the seat frame can be made even more efficient.

[0007] In this case, the one side is an engaging projection that protrudes toward the other side in the opposing direction, and the other side is an engaging hole that engages with the engaging projection, or an engaging recess that is recessed toward the opposite side from the one side in the opposing direction. With the above configuration, the simple shapes of the engaging protrusions and engaging recesses allow for easy positioning of both frames.

[0008] In this case, the engaging portion should contact the engaged portion in the opposing direction and the intersecting direction, and position the connecting frame in the opposing direction and the intersecting direction. With the above configuration, the frames of both can be positioned with greater precision.

[0010] Furthermore, the above problem is solved by the vehicle seat of the present invention, which is a vehicle seat equipped with a seat frame that forms the skeleton, wherein the seat frame comprises side frames arranged on the left and right sides in the seat width direction, and a connecting frame that connects the left and right side frames, the side frames have engaging portions that engage with engaged portions provided on the connecting frame and position the connecting frame, one of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other, and the other side engages with the one by abutting against the one in an intersecting direction that intersects with the opposing direction, The connecting frame is formed from a plate-shaped frame, and the connecting frame has reinforcing portions formed as protrusions or recesses on its surface and extending in the sheet width direction, and the engaged portion is preferably formed on the surface of the connecting frame at a position that avoids the reinforcing portion. The above configuration makes it possible to create a vehicle seat that streamlines the assembly process of the seat frame. Also, The above configuration allows for effective reinforcement of the connecting frame. Furthermore, with the above configuration, when forming a protruding engaged portion on the connecting frame, for example, by avoiding the uneven reinforcing portion of the connecting frame, the amount of vertical protrusion of the engaged portion can be reduced. As a result, interference between the engaged portion and other components can be suppressed.

[0011] In this configuration, the side frame is a side frame extending in the front-rear direction of the seat, the connecting frame is a pan frame installed on the front portions of the left and right side frames, the reinforcing portion is formed as a concave reinforcing recess, a fastening portion for fastening the seat components of the vehicle seat is formed on the upper surface of the portion of the pan frame in which the reinforcing recess is formed, and the engaged portions are formed on the left and right sides in the seat width direction, respectively, and are preferably positioned to sandwich the reinforcing recess in the seat width direction. The above configuration makes it possible to increase the assembly rigidity of the seat components with respect to the pan frame (fastening part). For example, a seat cover material is envisioned as the seat component, and the outer edge of the cover material can be fastened to the pan frame (fastening part). Furthermore, interference between the engaged portion and the sheet components (e.g., the surface end portion) can be suppressed.

[0012] Furthermore, the above problem is solved by the vehicle seat of the present invention, which is a vehicle seat equipped with a seat frame that forms the skeleton, wherein the seat frame comprises side frames arranged on the left and right sides in the seat width direction, and a connecting frame that connects the left and right side frames, the side frames have engaging portions that engage with engaged portions provided on the connecting frame and position the connecting frame, one of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other, and the other side engages with the one by abutting against the one in an intersecting direction that intersects with the opposing direction, The side frame is a side frame extending in the front-rear direction of the seat, and the connecting frame is a pan frame installed on the front portions of the left and right side frames, and the side frame has a flange portion formed at the upper end of the side frame and protruding from the main body portion of the side frame to one side in the seat width direction, and the engaging portion is formed on the upper surface of the flange portion, and it is preferable that the engaging portion formed on the bottom surface of the pan frame engages with the engaged portion formed on the bottom surface of the pan frame when the upper surface of the flange portion and the bottom surface of the pan frame are superimposed. The above configuration makes it possible to create a vehicle seat that streamlines the assembly process of the seat frame. Also, With the above configuration, the engaged portion of the pan frame can be engaged with the engaging portion of the side frame in the vertical direction. Therefore, the positioning of both frames can be made easier.

[0013] Furthermore, the above problem is solved by the vehicle seat of the present invention, which is a vehicle seat equipped with a seat frame that forms the skeleton, wherein the seat frame comprises side frames arranged on the left and right sides in the seat width direction, and a connecting frame that connects the left and right side frames, the side frames have engaging portions that engage with engaged portions provided on the connecting frame and position the connecting frame, one of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other, and the other side engages with the one by abutting against the one in an intersecting direction that intersects with the opposing direction, The connecting frame is connected to the side frame by fastening a plurality of mounting members on the surfaces where the connecting frame and the side frame face each other, and the engaging portion and the engaged portion are preferably positioned between the first mounting member and the second mounting member in the front-rear direction of the seat. The above configuration makes it possible to create a vehicle seat that streamlines the assembly process of the seat frame. Also, The above configuration improves the positioning accuracy at the fastening positions of the first and second mounting members. Therefore, the fastening work of the first and second mounting members can be performed efficiently.

[0014] At this time, the engaging portion and the engaged portion each extend along the sheet width direction, each extending outward in the sheet width direction from the first attachment member and the second attachment member, and also extending inward in the sheet width direction from the first attachment member and the second attachment member, which is preferable. With the above configuration, the positioning accuracy in the front-rear direction and the up-down direction by the engaging portion and the engaged portion can be increased. Also, with the above configuration, the fastening work of the first attachment member and the second attachment member can be performed more efficiently.

[0015] Furthermore, the above problem is solved by the vehicle seat of the present invention, which is a vehicle seat equipped with a seat frame that forms the skeleton, wherein the seat frame comprises side frames arranged on the left and right sides in the seat width direction, and a connecting frame that connects the left and right side frames, the side frames have engaging portions that engage with engaged portions provided on the connecting frame and position the connecting frame, one of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other, and the other side engages with the one by abutting against the one in an intersecting direction that intersects with the opposing direction, The side frame is a side frame extending in the sheet front-rear direction, the connecting frame is a pan frame installed at the front portion of the left and right side frames, the pan frame has a frame body portion that is long in the sheet width direction, and left and right frame side wall portions that respectively project downward from both ends in the sheet width direction of the frame body portion, and it is preferable that the frame side wall portion and the engaged portion in the pan frame are formed at different positions in the sheet front-rear direction. The above configuration makes it possible to create a vehicle seat that streamlines the assembly process of the seat frame. Also, With the above configuration, the rigidity of the pan frame can be increased by the frame side wall portion, and the positioning of the pan frame with respect to the side frame can be performed by the engaged portion. At that time, it is also possible to avoid interference between the frame side wall portion and the engaged portion.

Effect of the Invention

[0016] According to the present invention, a vehicle seat capable of improving the efficiency of the assembly work of the seat frame can be realized. Specifically speaking, the positioning of the two frames can be easily performed. Also, the man-hours for the assembly work of the two frames can be reduced. Also, according to the present invention, the two frames can be positioned more accurately. Also, according to the present invention, the engagement state of the engaging portion and the engaged portion can be easily confirmed in the assembly work of the seat frame. Furthermore, according to the present invention, the connecting frame can be suitably reinforced. Furthermore, according to the present invention, interference between the engaging portion and the engaged portion with other components can be suppressed. Furthermore, according to the present invention, the assembly rigidity of the sheet components with respect to the pan frame (fastening portion) can be increased. Furthermore, according to the present invention, the fastening work of the first mounting member and the second mounting member can be performed efficiently. Furthermore, according to the present invention, the rigidity of the pan frame can be increased, and the positioning of the pan frame relative to the side frame can be easily performed. [Brief explanation of the drawing]

[0017] [Figure 1] This is a perspective view of the vehicle seat according to this embodiment. [Figure 2] This is a perspective view of the seat frame, which forms the framework of a vehicle seat. [Figure 3] This is a perspective view of a cushion frame, showing the side frame and pan frame. [Figure 4] This is an enlarged view of the main part of the cushion frame, showing the engaging protrusion and engaging recess. [Figure 5] This is a side view of the cushion frame. [Figure 6] This is a top view of the cushion frame. [Figure 7] This is a cross-sectional view taken along line VII-VII in Figure 6. [Figure 8A] This diagram shows the engaging projection and engaging recess of modified example 1. [Figure 8B] This diagram shows the engaging projection and engaging hole of modified example 2. [Figure 8C] This diagram shows the engaging projection and engaging hole of modified example 3. [Figure 8D] This diagram shows the engaging projection and engaging hole of modified example 4. [Modes for carrying out the invention]

[0018] Hereinafter, embodiments of the present invention will be described with reference to Figures 1 to 8D. This embodiment relates to a vehicle seat equipped with a seat frame, wherein the seat frame comprises side frames arranged on the left and right sides in the seat width direction, and a connecting frame connecting the left and right side frames, and the side frames have engaging portions that engage with engaged portions provided on the connecting frame to position the connecting frame, and one of the engaging portion and the engaged portion protrudes toward the other, and the other portion engages with the one by abutting toward the one. In vehicle seating, the side of the seat back that the occupant sits on is considered the front of the seat.

[0019] As shown in Figure 1, the vehicle seat S of this embodiment is a vehicle seat and mainly consists of a seat body comprising a seat back 1 and a seat cushion 2, a rail device 3 that supports the seat body so as to be movable forward and backward relative to the vehicle floor as shown in Figure 2, a height link device 4 that connects the seat body to the vehicle floor so as to be able to move up and down, and a reclining device 5 that connects the seat back 1 to the seat cushion 2 so as to be able to rotate.

[0020] As shown in Figure 1, the seat back 1 is a backrest that supports the occupant from behind, and is constructed by placing a pad material 1a on a back frame 10, which forms the skeleton, as shown in Figure 2, and covering it with a surface material 1b. The seat cushion 2 is a seating portion that supports the occupant from below, and is constructed by placing a pad material 2a on a cushion frame 20, which serves as the skeleton, as shown in Figure 2, and covering it with a surface material 2b.

[0021] As shown in Figure 2, the rail device 3 is positioned between the seat body and the vehicle floor in the vertical direction and mainly consists of left and right lower rails 3a fixed to the vehicle floor and extending in the front-rear direction of the seat, left and right upper rails 3b supported so as to be slidable along the lower rails 3a, a locking member (not shown) that locks the upper rails 3b so as not to slide relative to the lower rails 3a, and a rail operating lever 3c for releasing the locked state of the locking member. Cushion frames 20 are installed on the upper surfaces of the left and right upper rails 3b via height link devices 4.

[0022] As shown in Figure 2, the height link device 4 is installed between the rail device 3 and the cushion frame 20 and mainly consists of left and right first links 4a located on the front side of the seat, left and right second links 4b located on the rear side of the seat, a locking member (not shown) that locks the seat body so that it cannot be raised or lowered, and a height adjustment lever (not shown) for releasing the lock state of the locking member. The second links 4b act as drive links, making it possible to adjust the height of the seat body.

[0023] As shown in Figure 2, the reclining device 5 mainly consists of a reclining body 5a that is driven when the back frame 10 is rotated, a pivot shaft 5b, a spiral spring 5c ​​that biases the back frame 10 to rotate forward around the pivot shaft 5b, and a reclining operation lever (not shown) that is operated to release the locked state of the back frame 10.

[0024] The reclining body 5a has a known locking mechanism, which allows the state of the back frame 10 to be switched between a locked state in which it is fixed to the cushion frame 20 and an unlocked state in which it is rotatable relative to the cushion frame 20. The pivot shaft 5b is pivotally supported on the back frame 10 side and the cushion frame 20 side in the seat width direction, and the spiral spring 5c ​​has one end locked to the back frame 10 side and the other end locked to the cushion frame 20 side.

[0025] As shown in Figure 2, the back frame 10 consists of a roughly rectangular frame-like body and is mainly composed of back side frames 11 arranged on the left and right sides, an inverted U-shaped upper frame 12 connecting the upper ends of each back side frame 11, a plate-shaped lower frame 13 connecting the lower ends of each back side frame 11, a member frame 14 connecting the upper parts of each back side frame 11, and elastic springs (not shown) that are attached to each back side frame 11 and extend in a snake-like manner. The back side frame 11 is a sheet metal member that extends vertically and has a roughly C-shaped cross-section, and its lower end is connected to the rear end of the side frame 21 via a reclining device 5.

[0026] As shown in Figure 2, the backside frame 11 has an engaging projection 140 that engages with an engaging recess 150 provided on the upper frame 12 and positions the upper frame 12. The back side frame 11 corresponds to the "side frame," and the upper frame 12 corresponds to the "connecting frame." The engaging projection 140 is formed to protrude toward the engaging recess 150 side (seat front side) in the opposing direction (seat front-rear direction) where the back side frame 11 and the upper frame 12 face each other. The engaging recess 150 is formed to be recessed toward the opposite side (front side of the sheet) from the engaging projection 140 in the above opposing direction. The engaging recess 150 engages with the engaging projection 140 by abutting against it in an intersecting direction (up and down direction and sheet width direction) that intersects with the above opposing direction (front and rear direction of the sheet).

[0027] As shown in Figures 2 and 3, the cushion frame 20 is mainly composed of a roughly rectangular frame-like body, side frames 21 arranged on the left and right sides and extending in the front-rear direction of the seat, a plate-shaped pan frame 30 installed on the front end portion of each side frame 21, a front connecting frame 22 connecting the front portions of each side frame 21, a rear connecting frame 23 connecting the rear portions of each side frame 21, and a plurality of elastic springs 24 that are attached to the pan frame 30 and the rear connecting frame 23 and extend in a snake-like manner in the front-rear direction of the seat.

[0028] As shown in Figures 3 to 7, the side frame 21 is a long, plate-shaped frame in the front-rear direction of the seat, and has a frame body portion 21a, and an upper end flange portion 21b and a lower end flange portion 21c that bend and protrude outward in the seat width direction from the upper end and lower end of the frame body portion 21a, respectively. Furthermore, the side frame 21 is formed by cutting and raising a part of the side surface of the frame body portion 21a and has a surface fastening portion 21d for fastening the end portion of the surface material 2b. Furthermore, the side frame 21 has mounting holes 21e (mounting parts) formed on the upper surface of the upper end flange portion 21b for attaching the pan frame 30. Multiple surface fastening portions 21d and mounting holes 21e are formed at predetermined intervals in the front-to-back direction of the seat. A reclining device 5 is attached to the rear end of the side frame 21.

[0029] As shown in Figure 4, the side frame 21 has an engaging projection 40 formed on the upper surface of the upper end flange portion 21b that engages with an engaging recess 50 provided on the pan frame 30 and is used to position the pan frame 30. Note that side frame 21 corresponds to "side frame," and pan frame 30 corresponds to "connecting frame."

[0030] As shown in Figure 2, the front connecting frame 22 and the rear connecting frame 23 are each pipe-shaped frames that connect the left and right side frames 21, as well as the left and right links (first link 4a and second link 4b).

[0031] The elastic spring 24 is an elastic support member that supports the buttocks of a seated person, and multiple springs are provided at predetermined intervals in the width direction of the seat. The front end of the elastic spring 24 is attached to a spring fastening portion 37 formed on the upper surface of the pan frame 30. The rear end of the elastic spring 24 is attached to the rear connecting frame 23 via a hook member.

[0032] As shown in Figures 3 to 7, the pan frame 30 is a plate-shaped frame (connecting frame) that is mounted on the upper surfaces of the left and right side frames 21 and supports the thighs of the seated person. The lateral portion of the pan frame 30 in the seat width direction is mounted on the upper surface of the side frames 21. Specifically, the pan frame 30 is mainly composed of a rectangular plate-shaped frame body 31 that is elongated in the sheet width direction, a frame front wall 32 that protrudes downward from the front end of the frame body 31, and left and right frame side wall 33 that protrude downward from both the left and right ends of the frame body 31.

[0033] Furthermore, the front wall portion 32 and the side wall portion 33 of the frame have bent portions 32a and 33a formed by bending the tip of the said tip upward. The folded portion 32a is formed continuously so as to extend along the width direction of the sheet, and is specifically formed by a curling process.

[0034] As shown in Figures 3 and 6, the pan frame 30 includes a first reinforcing recess 34 and a second reinforcing recess 35 formed as recesses on the upper surface of the frame body 31 and extending in the sheet width direction. The first reinforcing recess 34 and the second reinforcing recess 35 are each substantially rectangular reinforcing parts that are elongated in the width direction of the sheet, and the first reinforcing recess 34 is positioned further forward of the sheet than the second reinforcing recess 35.

[0035] A skin fastening portion 36 for fastening the end portion of the skin material 2b is formed on the upper surface of the first reinforcing recess 34. Furthermore, a spring fastening portion 37 for fastening one end of the elastic spring 24 is formed on the upper surface of the second reinforcing recess 35. The surface fastening portion 36 is formed by partially cutting and raising the upper surface of the first reinforcing recess 34, and multiple portions are formed at intervals in the sheet width direction. The spring fastening portion 37 is formed by partially cutting and raising the upper surface of the second reinforcing recess 35, and multiple portions are formed at predetermined intervals in the sheet width direction. The surface fastening portion 36 and the spring fastening portion 37 are positioned at different locations in the width direction of the seat.

[0036] As shown in Figures 3 to 5, the pan frame 30 is formed at both ends of the frame body 31 in the sheet width direction and has left and right mounting holes 38 for attaching the left and right side frames 21. The pan frame 30 is assembled to the side frame 21 by fastening the mounting bolts 39 with the mounting holes 38 of the pan frame 30 and the mounting holes 21e of the side frame 21 in communication. Multiple mounting holes 38 are formed on the left and right sides, spaced apart in the front-to-back direction of the seat. In this embodiment, two holes are formed on each side.

[0037] The pan frame 30 has engaging recesses 50 formed at both ends of the frame body 31 in the sheet width direction, which engage with engaging protrusions 40 provided on the side frame 21.

[0038] <Details of the engaging protrusions and engaging recesses> As shown in Figures 3 to 7, the engaging projection 40 is formed to protrude toward the engaging recess 50 side (upward side) in the opposing direction (up and down direction) where the side frame 21 and the pan frame 30 face each other. The engaging recess 50 is formed to be recessed in the vertical direction on the opposite side (upward side) from the engaging projection 40. The engagement projection 140 and engagement recess 150 have the same configuration as the engagement projection 40 and engagement recess 50, so their explanation will be omitted.

[0039] Specifically, the engaging projection 40 and the engaging recess 50 each have a substantially semi-elliptical cross-section and a substantially fan-shaped longitudinal cross-section, and are formed to be curved. As shown in Figure 4, the engaging projection 40 has a front wall portion 41, a rear wall portion 42, and a side wall portion 43 that project upward from the upper surface of the side frame 21, and an upper wall portion 44 that connects the upper ends of the front wall portion 41, the rear wall portion 42, and the side wall portion 43, respectively. The engaging recess 50 has a front wall portion 51, a rear wall portion 52, and a side wall portion 53 that project upward from the surface of the pan frame 30, and an upper wall portion 54 that connects the upper ends of the front wall portion 51, the rear wall portion 52, and the side wall portion 53, respectively.

[0040] The engaging projection 40 engages with the engaging recess 50 formed on the bottom surface of the pan frame 30 when the upper surface of the upper end flange portion 21b and the bottom surface of the pan frame 30 are superimposed. The engaging projection 40 then abuts against (reaches with) the engaging recess 50 in the vertical direction, the front-to-back direction of the sheet, and the width direction of the sheet, thereby positioning the pan frame 30.

[0041] In the above configuration, as shown in Figures 4 and 5, the engaging projection 40 is formed on the outer end of the side frame 21 in the sheet width direction, and the engaging recess 50 is formed on the outer end of the pan frame 30 in the sheet width direction. In other words, the engaging projection 40 and the engaging recess 50 are exposed on the outside of the cushion frame 20 in the seat width direction. This makes it easy to check the engagement state of the engaging protrusion 40 and the engaging recess 50 during the assembly of the seat frame. Furthermore, it streamlines the assembly process of the seat frame.

[0042] In the above configuration, as shown in Figure 6, the engaging recess 50 is formed on the surface of the pan frame 30 at a position that avoids the first reinforcing recess 34 and the second reinforcing recess 35. By doing so, the pan frame 30 can be adequately reinforced. Furthermore, by forming the engagement recess 50 in the pan frame 30 while avoiding the unevenly shaped reinforcing recesses 34 and 35, the amount of vertical protrusion of the engagement recess 50 can be reduced. As a result, interference between the engagement recess and other components can be suppressed.

[0043] In the above configuration, as shown in Figure 6, a skin fastening portion 36 is formed on the upper surface of the first reinforcing recess 34 in the pan frame 30. In addition, a spring fastening portion 37 is formed on the upper surface of the second reinforcing recess 35. The engaging recesses 50 are formed on the left and right sides in the sheet width direction, and are positioned to sandwich the reinforcing recesses 34 and 35 in the sheet width direction. By doing so, the rigidity of the pan frame 30 can be increased while suppressing interference between the engaging recess 50 and the seat components (specifically, the surface material 2b and the elastic spring 24).

[0044] In the above configuration, as shown in Figure 6, the engaging projection 40 and the engaging recess 50 are respectively positioned between the first mounting bolt 39A and the second mounting bolt 39B in the front-rear direction of the seat. Furthermore, the engaging projection 40 and the engaging recess 50 each extend in a long manner along the sheet width direction. Specifically, they each extend outward in the sheet width direction beyond the mounting bolts 39A and 39B, and also extend inward in the sheet width direction beyond the mounting bolts 39A and 39B. This improves the positioning accuracy of the mounting bolts 39A and 39B. As a result, the fastening work of the mounting bolts 39A and 39B can be performed more efficiently.

[0045] In the above configuration, as shown in Figure 5, the pan frame 30 has a frame side wall 33 and an engagement recess 50 formed at different positions in the front-rear direction of the sheet. Furthermore, the frame side wall portion 33 protrudes downward, and the engaging recess 50 protrudes upward. By doing so, the rigidity of the pan frame 30 can be increased by the frame side wall portion 33, while the positioning of the pan frame 30 relative to the side frame 21 can be controlled by the engaging recess 50. At the same time, interference between the frame side wall portion 33 and the engaging recess 50 can be avoided.

[0046] <Variations of cushion frames 1-4> Next, we will explain four modified examples of the cushion frame, based on Figures 8A to 8D. Note that explanations that overlap with the cushion frame 20 described above will be omitted.

[0047] In the cushion frame 220 of the modified example 1, as shown in Figure 8A, the side frame 221 has an engaging projection 240 and the pan frame 230 has an engaging recess 250. The engaging projection 240 is a substantially rectangular projection that protrudes from the side frame 221 toward the engaging recess 250. The engaging recess 250 is a substantially rectangular recess formed so as to be recessed in the vertical direction on the opposite side (upward side) from the engaging projection 240. The engaging projection 240 and the engaging recess 250 are formed, for example, by press molding.

[0048] Specifically, the engaging projection 240 has a front wall portion 241, a rear wall portion 242, and left and right side wall portions 243 that protrude upward from the upper surface of the side frame 221, as well as an upper wall portion 244. Similarly, the engaging recess 250 has a front wall portion 251, a rear wall portion 252, left and right side wall portions 253, and an upper wall portion 254. In other words, the engaging projection 240 and the engaging recess 250 are in contact with each other in four directions: the front-to-back direction of the seat and the left-to-right direction of the seat.

[0049] Even with the above configuration, this vehicle seat allows for more efficient assembly of the seat frame. In particular, the positioning accuracy of both frames is improved, making it easier to position both frames.

[0050] In the cushion frame 320 of the modified example 2, as shown in Figure 8B, the side frame 321 has an engaging projection 340, and the pan frame 330 has an engaging hole 350. The engaging projection 340 is a substantially rectangular projection that protrudes in the vertical direction from the side frame 321 toward the engaging hole 350. The engagement hole 350 is a roughly rectangular through-hole that extends vertically. The engaging projection 340 penetrates the engaging hole 350 and protrudes above the engaging hole 350, and abuts against the edge portion of the engaging hole 350 over almost its entire circumference.

[0051] Even with the above configuration, this vehicle seat allows for more efficient assembly of the seat frame. In other words, the positioning of both frames can be easily performed.

[0052] In the cushion frame 420 of the modified example 3, as shown in Figure 8C, the side frame 421 has an engaging projection 440, and the pan frame 430 has an engaging hole 450. The engaging projection 440 is a rectangular plate-shaped cut-out portion formed by cutting out a part of the upper surface of the side frame 421. Specifically, the engaging projection 440 has a cut-out portion 441 that protrudes upward and a folded portion 442 formed by folding back the tip of the cut-out portion 441. The engagement hole 450 is a roughly rectangular through-hole that penetrates in the vertical direction.

[0053] The engaging projection 440 penetrates the engaging hole 450 and protrudes above the engaging hole 450, and is in contact with the edge of the engaging hole 450. More specifically, the engaging projection 440 abuts against the front edge, left edge, and right edge of the entire edge of the engaging hole 450.

[0054] Even with the above configuration, this vehicle seat allows for more efficient assembly of the seat frame. In other words, the positioning of both frames can be easily performed.

[0055] In the modified example 4, the cushion frame 520, as shown in Figure 8D, has an engaging notch 540 on the side frame 521 and an engaging bent portion 550 on the pan frame 530. The engaging notch 540 is a roughly rectangular notch formed by partially cutting out the outer end of the upper surface of the side frame 521. The engaging bent portion 550 is a bent portion (flexed portion) formed by bending a part of the outer end of the pan frame 530 downward. Furthermore, the pan frame 530 has a reinforcing bead 560 that is formed in a convex shape from the frame body portion 531 to the engaging bent portion 550.

[0056] The engaging bent portion 550 is positioned by contacting the bottom wall portion 541 of the engaging notch portion 540 and the front and rear side walls 542 and 543. In other words, the pan frame 530 is positioned relative to the side frame 521 in the front-rear and left-right directions. Even with the above configuration, this vehicle seat allows for more efficient assembly of the seat frame. In other words, the positioning of both frames can be easily performed.

[0057] <Other Embodiments> In the above embodiment, as shown in Figures 2 and 3, the cushion side frame 21 corresponds to the "side frame" and the pan frame 30 corresponds to the "connecting frame" in the cushion frame 20, but this is not particularly limited and can be changed. For example, the front connecting frame 22 may correspond to the "connecting frame." That is, the front connecting frame 22 may have an engaging recess 50. Alternatively, for example, the rear connecting frame 23 may be considered equivalent to the "connecting frame".

[0058] In the above embodiment, as shown in Figure 2, the back side frame 11 corresponds to the "side frame" and the upper frame 12 corresponds to the "connecting frame" in the back frame 10, but this is not particularly limited and can be changed. For example, the lower frame 13 may correspond to a "connecting frame." That is, the lower frame 13 may have an engaging recess 70. Alternatively, for example, member frame 14 may correspond to a "connecting frame".

[0059] In the above embodiment, as shown in Figure 4, the side frame 21 has an engaging projection 40 and the pan frame 30 has an engaging recess 50, but this is not particularly limited and can be modified. Conversely, the side frame 21 may have an engaging recess 50 and the pan frame 30 may have an engaging projection 40.

[0060] In the above embodiment, as shown in Figure 4, the engaging projection 40 abuts against the engaging recess 50 in the four directions of the sheet's front-rear direction and sheet width, but this is not particularly limited and can be changed. For example, the engaging projection 40 may contact the engaging recess 50 in the front-rear direction of the seat, or it may contact the engaging recess 50 in the width direction of the seat. In other words, it is sufficient that the engaging projection 40 contacts the engaging recess 50 in at least one of the four directions: front, rear, left, and right. Furthermore, it is preferable that the engaging projection 40 abuts against the engaging recess 50 in the front-to-back direction, the width direction, and the vertical direction of the sheet. Doing so can further improve the positioning accuracy of the engaging projection 40 and the engaging recess 50.

[0061] In the above embodiment, as shown in Figure 6, the engaging projection 40 and the engaging recess 50 are arranged on the left and right sides in the width direction of the sheet, respectively, but this is not particularly limited and can be changed. For example, the engaging projection 40 and the engaging recess 50 may each be arranged only in one direction in the sheet width direction.

[0062] In the above embodiment, as shown in Figures 4 and 8A to 8C, the engaging protrusions 40, 140, 240, 340, and 440 are formed by press molding or cutting and bending, but are not particularly limited and can be modified. For example, the engaging projection 40 may be formed by attaching a separate frame piece to the upper surface of the cushion side frame 21.

[0063] In the above embodiment, as shown in Figure 6, the pan frame 30 is provided with reinforcing recesses 34 and 35, but it is not limited to concave reinforcing portions and can be modified. For example, the pan frame 30 may have a reinforcing projection formed as a protrusion on its upper surface and extending in the direction of the sheet width.

[0064] In the above embodiment, a vehicle seat used in an automobile was described as a specific example, but it is not particularly limited and can be used as a seat for vehicles such as trains and buses, as well as for vehicles such as airplanes and ships.

[0065] In this embodiment, the vehicle seat according to the present invention was described primarily. However, the embodiments described above are merely examples to facilitate understanding of the present invention and do not limit it. The present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included. [Explanation of symbols]

[0066] S Vehicle Seat Sa seat frame 1 seat back 1a, 2a Pad material 1b, 2b Skin material 2 seat cushions 3 Rail device 3a Lower Rail 3b Upper Rail 3c Rail Operating Lever 4. Height Link Device 4a First Link 4b Second Link 5. Reclining device 5a Reclining chair body 5b Rotating shaft 5c spiral spring 10 Backframe 11. Backside frame (side frame) 12. Upper frame (connecting frame) 13 Lower frame 14 Member Frames 20, 220, 320, 420, 520 Cushion Frame 21, 221, 321, 421, 521 Side frame (cushioned side frame) 21a Frame main body 21b Upper flange portion (flange portion) 21c Lower flange section 21d Surface fastening part 21e Mounting Holes 22 Front connecting frame 23 Rear connecting frame 24. Elastic spring (elastic component) 30, 230, 330, 430, 530 Pan Frame (Connecting Frame) 31, 531 Frame main body 32 Front wall section of the frame 32a, 33a Folded section 33 Frame side wall 34. First reinforcing recess (reinforcement section) 35 Second reinforcing recess (reinforcement section) 36. Surface fastening part (fastening part) 37. Spring fastening part (fastening part) 38 mounting holes 39. Mounting bolts (mounting components) 39A First mounting bolt (first mounting member) 39B Second mounting bolt (second mounting member) 40, 140, 240, 340, 440 Engaging protrusions (engaging parts) 41, 241 Front wall 42, 242 Rear wall 43, 243 Side wall section 44, 244 Upper wall part 441 Cutting and lifting section 442 Folded section 50, 150, 250 Engaging recess (engaged portion) 51, 251 Front wall 52, 252 Rear wall 53, 253 Side wall section 54, 254 Upper wall part 350, 450 Engagement holes (engaged parts) 540 Engaging notch (engaging portion) 541 Bottom wall section 542, 543 Side wall section 550 Engaging bent portion (engaged portion) 560 Reinforcement Bead

Claims

1. A vehicle seat equipped with a seat frame that forms the skeleton, The aforementioned seat frame is Side frames are positioned on the left and right sides in the width direction of the seat, It comprises a connecting frame that connects the left and right side frames, The side frame has an engaging portion that engages with an engaging portion provided on the connecting frame and positions the connecting frame, One of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other. The other party engages with the one party by coming into contact with it in an intersecting direction that intersects with the opposing direction. The engagement portion is formed at the outer end of the side frame in the seat width direction, The engaged portion is formed at the outer end of the connecting frame in the sheet width direction, A vehicle seat characterized in that the engaging portion and the engaged portion are exposed on the outside of the seat frame in the seat width direction.

2. The one of the above is an engaging projection that protrudes toward the other side in the opposing direction, The other side is an engagement hole that engages with the engagement projection, or an engagement recess that is recessed toward the opposite side from the one side in the opposing direction, as described in claim 1 for a vehicle seat.

3. The aforementioned engaging portion is In the opposing direction and the intersecting direction, the engaged portion is in contact with the engaged portion. The vehicle seat according to claim 1 or 2, characterized in that the connecting frame is positioned in the opposing direction and the intersecting direction.

4. A seat for a vehicle having a seat frame that forms the skeleton, The aforementioned seat frame is Side frames are positioned on the left and right sides in the width direction of the seat, It comprises a connecting frame that connects the left and right side frames, The side frame has an engaging portion that engages with an engaging portion provided on the connecting frame and positions the connecting frame, One of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other. The other party engages with the one party by coming into contact with it in an intersecting direction that intersects with the opposing direction. The aforementioned connecting frame is formed from a plate-shaped frame, The connecting frame has reinforcing portions formed as protrusions or recesses on its surface and extending in the sheet width direction, The seat for a vehicle is characterized in that the engaged portion is formed on the surface of the connecting frame at a position that avoids the reinforcing portion.

5. The aforementioned side frame is a side frame that extends in the front-to-rear direction of the seat, The connecting frame is a pan frame that is installed on the front portion of the left and right side frames, The reinforcing portion is formed as a concave reinforcing recess, In the pan frame, a fastening portion is formed on the upper surface of the portion where the reinforcing recess is formed, for fastening the seat components of the vehicle seat. The vehicle seat according to claim 4, characterized in that the engaged portions are formed on the left and right sides in the seat width direction and are positioned to sandwich the reinforcing recess in the seat width direction.

6. A seat for a vehicle having a seat frame that forms the skeleton, The aforementioned seat frame is Side frames are positioned on the left and right sides in the width direction of the seat, It comprises a connecting frame that connects the left and right side frames, The side frame has an engaging portion that engages with an engaging portion provided on the connecting frame and positions the connecting frame, One of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other. The other party engages with the one party by coming into contact with it in an intersecting direction that intersects with the opposing direction. The aforementioned side frame is a side frame that extends in the front-to-rear direction of the seat, The connecting frame is a pan frame that is installed on the front portion of the left and right side frames, The side frame has a flange portion formed at the upper end of the side frame and protruding from the main body portion of the side frame to one side in the seat width direction, The aforementioned engaging portion is Formed on the upper surface of the flange portion, A vehicle seat characterized in that the upper surface of the flange portion and the bottom surface of the pan frame are superimposed, and the seat engages with the engaging portion formed on the bottom surface of the pan frame.

7. A seat for a vehicle having a seat frame that forms the skeleton, The aforementioned seat frame is Side frames are positioned on the left and right sides in the width direction of the seat, It comprises a connecting frame that connects the left and right side frames, The side frame has an engaging portion that engages with an engaging portion provided on the connecting frame and positions the connecting frame, One of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other. The other party engages with the one party by coming into contact with it in an intersecting direction that intersects with the opposing direction. The connecting frame is connected to the side frame by fastening a plurality of mounting members on the surfaces where the connecting frame and the side frame face each other. A vehicle seat characterized in that the engaging portion and the engaged portion are each positioned between a first mounting member and a second mounting member in the front-rear direction of the seat.

8. The engaging portion and the engaged portion are, Each extends along the width of the seat, The vehicle seat according to claim 7, characterized in that each extends outward in the seat width direction more than the first mounting member and the second mounting member, and extends inward in the seat width direction more than the first mounting member and the second mounting member.

9. A seat for a vehicle, comprising a seat frame that forms the skeleton, The aforementioned seat frame is Side frames are positioned on the left and right sides in the width direction of the seat, It comprises a connecting frame that connects the left and right side frames, The side frame has an engaging portion that engages with an engaging portion provided on the connecting frame and positions the connecting frame, One of the engaging portion and the engaged portion is formed to protrude toward the other side of the engaging portion and the engaged portion in the opposing direction in which the side frame and the connecting frame face each other. The other party engages with the one party by coming into contact with it in an intersecting direction that intersects with the opposing direction. The aforementioned side frame is a side frame that extends in the front-to-rear direction of the seat, The connecting frame is a pan frame that is installed on the front portion of the left and right side frames, The pan frame comprises a frame body that is elongated in the sheet width direction, and left and right frame side walls that protrude downward from both ends of the frame body in the sheet width direction. A seat for a vehicle, characterized in that the pan frame has the frame side wall portion and the engaged portion formed at different positions in the front-rear direction of the seat.

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