JP6693378B2 - Vehicle seat cushion structure - Google Patents

Description

  The present invention relates to a vehicle seat cushion structure including a cushion pad and a plurality of springs having different shapes and sizes.

  2. Description of the Related Art Conventionally, as a seat cushion for sitting in a vehicle, particularly in an automobile, a seat device for a vehicle provided with a plurality of springs having different shapes and sizes together with a cushion pad in order to improve sitting comfort performance of a seated occupant (for example, Patent Document 1) and a seat cushion structure are known.

  As shown in FIG. 6, the seat cushion of the vehicle seat device includes a front cushion of the upper cushion pad 101 between an upper cushion pad 101 that elastically supports a seated occupant and a frame member 102 that fixes the upper cushion pad 101 to the upper portion. A first compression coil spring 103 that elastically supports a portion, an S spring 104 that elastically supports the upper cushion pad 101 in the front-rear direction, and a lower cushion pad 105 arranged between the S spring 104 and the frame member 102. A cushion pad elevating means 107 for supporting the lower cushion pad 105 by a second compression coil spring 106 so as to be able to move up and down, and an engaging portion 108 for engaging the lower cushion pad 105 when the upper cushion pad 101 descends. It is arranged.

  The seat cushion 100 of the seat device for a vehicle configured as described above is elastically supported by the first compression coil spring 103 and the S spring 104 because the upper cushion pad 101 descends when an occupant sits on the seat cushion 100. As a result, the sitting comfort of the seated occupant can be improved, and further, the seating occupant can be supported in a stable state by the engagement portion 108 being engaged by the cushion pad elevating means 107.

  As shown in FIG. 5B, the seat cushion structure of the vehicle includes a cushion pad 4 that elastically supports a seated occupant and a frame structure 5 (not shown) that fixes the cushion pad 4 to the upper portion. A compression coil spring (not shown) that elastically supports the portion of the cushion pad 4 that supports the buttocks of the seated occupant, an S spring 7 that elastically supports the cushion pad 4 in the front-rear direction, and a front end of the S spring 7. A fish mouth-shaped spring portion 71 formed toward the frame structure 5, a front end thereof is rotatably connected to an intermediate portion in the front-rear direction of the frame structure 5, and a rear end thereof is a rear end of the S spring 7. And the link member 8 to which is fixed. The link member 8 is formed in a substantially U-shape in plan view, and both legs are front ends.

  In the seat cushion structure of the vehicle thus configured, when the occupant sits on the seat cushion, the cushion pad 4 descends. Therefore, elastic comfortably supported by the compression coil spring and the S spring 7 improves the sitting comfort of the seated occupant. Further, the seat occupant can be supported in a stable state by the roll rigidity by the stabilizer function of the link member 8 formed in a substantially U-shape in plan view.

  Note that there is no prior art document regarding the present invention regarding the seat cushion structure of this vehicle. This is because the prior art known by the applicant is not related to the invention known in the literature.

JP-A-6-304035

  However, in the cushion pad elevating / lowering means 107 of the vehicle seat device described in the background art, in order to support the seated occupant in a stable state by engaging the engaging portion 108, the lower cushion pad 105 is provided. In order to selectively perform the movement of abutting from the lower side and the movement of separating the lower cushion pad 105 from the upper cushion pad 101 to the lower side, there is a problem that the mechanism becomes complicated.

  Further, in the vehicle seat cushion structure described in the background art, when a portion of the seat cushion 2 that supports the seated occupant's buttocks is depressed by the occupant sitting on the seat cushion 2, the frame structure 5 is rotatable. When the link member 8 circularly moves downward about the connection point 85 of the link member 8 connected to the S spring 7 and the S spring 7 is pulled toward the seat rear side, the fish mouth-shaped spring portion 71 has a lower end portion. Since the terminal 71a is rotatably connected to the frame structure 5, the S spring 7 is stretched upward so that the S spring 7 is in a sagging state and the portion supporting the thigh portion of the seat cushion 2 is abnormal from the initial state. There was a difficulty that it was raised. When the portion supporting the thigh portion of the seat cushion 2 is lifted in this manner, the fish mouth-shaped spring portion 71 is less likely to bend and the thigh portion is pressed, so that the sitting comfort performance of the seated occupant is deteriorated. become.

  The present invention has been made to solve such conventional problems, and in a seat cushion structure for improving sitting comfort performance of a seated occupant and supporting the seated occupant in a stable state, a large seat cushion is used. It is an object of the present invention to achieve a further improvement in sitting comfort performance of a portion supporting the thigh with a simple mechanism.

A vehicle seat cushion structure according to a first aspect of the present invention that achieves the above-mentioned object is formed so as to form an outer shape of a seat cushion, and forms a skeleton of a seat cushion and a cushion pad that elastically supports a seated occupant. And a frame structure for fixing the cushion pad to the upper part. Between the cushion pad and the frame structure, a compression coil spring that elastically supports the seating load of a seated occupant, and an S spring that elastically supports the cushion pad in the front-rear direction in order to suppress fatigue of the cushion pad. And are arranged.
The ends of both legs of the link member having a substantially U-shape in plan view each having two legs and a continuous portion continuously provided at one end of each leg are located at intermediate portions in the front-rear direction of the frame structure. The rear end of the S spring is fixed to a continuous portion located rearward of the frame structure while being rotatably connected.
Further, a slide mechanism for sliding the lower end of the fish mouth-shaped spring portion formed toward the frame structure at the front end of the S spring in the front-rear direction and restricting the vertical movement of the frame structure has a sliding mechanism. It is provided in one part.
In addition, in the present specification, “connected” means connected in a continuous state.

  According to the vehicle seat cushion structure of the first aspect, when the occupant sits on the seat cushion and the portion of the seat cushion that supports the buttocks of the occupant sinks, the compression coil spring causes the seat occupant to sit. When the seat spring is compressed by the seating load, the link member is circularly moved downward about the connecting point of the link member that is rotatably connected to the frame structure, and the S spring is pulled toward the seat rear side. However, since the lower end portion of the fish mouth spring portion can be slid backward by the slide mechanism, it is possible to prevent the fish mouth spring portion from extending upward.

  According to a second aspect of the present invention, in the vehicle seat cushion structure according to the first aspect, the bracket having the elongated hole formed in the longitudinal direction along the sliding direction of the lower end portion of the fish mouth-shaped spring portion has a frame structure. A rod-shaped member, which is fixed to one part of the body and is movable in the sliding direction in the elongated hole, is fixed to the lower end of the fish mouth spring portion.

  According to the vehicle seat cushion structure of the second aspect, when the link member moves downward in a circular arc, the rod-shaped member fixed to the lower end of the fish mouth spring is fixed to a part of the frame structure. Since it can be slid backward in the elongated hole of the bracket, the lower end of the fish mouth spring part can be slid backward.

  A third aspect of the present invention is a vehicle seat cushion structure according to the second aspect, wherein a rod-shaped member fixed to the fish mouth spring portion and a rod-shaped member provided between both leg portions of the link member are connecting members. Are connected by.

  According to the vehicle seat cushion structure of the third aspect, the rod-shaped member fixed to the fish mouth spring portion and the rod-shaped member provided between the two leg portions of the link member are connected by the connecting member. Therefore, according to the downward arc movement of the link member, the lower end of the fish mouth spring portion can be pulled backward by the rod member of the link member for a predetermined length. The load absorption function of can be kept excellent.

  A fourth aspect of the present invention is the vehicle seat cushion structure according to the third aspect, wherein the connecting member is a woven base fabric woven of synthetic fibers having low stretchability and high dimensional stability. is there.

  According to the vehicle seat cushion structure of the fourth aspect, since the ring-shaped locking portion for hooking on the rod-shaped member can be formed by sewing, workability is improved, and the seat is Even if it bends and interferes with other parts, generation of abnormal noise can be prevented.

  According to the vehicle seat cushion structure of the present invention, in the seat cushion structure for improving the seating comfort performance of the seated occupant and supporting the seated occupant in a stable state, the thigh part of the seat cushion is further supported. It is possible to improve the sitting comfort performance with a simple mechanism.

FIG. 1 is a vertical cross-sectional view of a seat cushion showing a preferred embodiment of a vehicle seat cushion structure of the present invention. FIG. 2 is a plan view of the seat cushion of FIG. 1 excluding a cushion pad. It is a perspective view which shows the slide mechanism which slides the lower part of the fish mouth type spring part formed in the S spring of the seat cushion of FIG. It is a perspective view which shows the relationship between the seat cushion and seat cushion frame of FIG. (A) is explanatory drawing which shows the operating state of the vehicle seat cushion structure of this invention, (B) is explanatory drawing which shows the operating state of the conventional vehicle seat cushion structure. It is sectional drawing which cut | disconnected longitudinally the seat cushion to which the conventional vehicle seat device is applied.

  Hereinafter, an example of a mode for carrying out the vehicle seat cushion structure of the present invention will be described with reference to the drawings. In each of the drawings used in the embodiment for carrying out the present invention, the direction is indicated by an arrow, which indicates the direction viewed from an occupant seated in the driver's seat. The arrow UP indicates the vehicle upward direction, the arrow Fr indicates the vehicle front direction, the arrow RH indicates the vehicle right direction, and the arrow LH indicates the vehicle left direction. Further, in the present specification, even when “front, rear, left, right” indicating directionality is described, it indicates the direction viewed from the occupant seated in the driver's seat.

  As shown in FIG. 4, a vehicle seat to which the vehicle seat cushion structure of the present invention is applied includes a seat cushion 2 arranged on a floor portion of a vehicle compartment of a vehicle such as an automobile, and a lower portion supported by a rear portion of the seat cushion 2. The seat back 3 is configured to be seated by an occupant.

  As shown in FIGS. 1 and 2, the seat cushion 2 is formed in a substantially rectangular plane shape that forms the outer shape of the seat cushion 2, a cushion pad 4 that elastically supports a seated occupant, and a substantially plane frame that forms the skeleton of the seat cushion 2. And a frame structure 5 for fixing the cushion pad 4 to the upper part.

  The cushion pad 4 has an outer surface covered with a seat cover 41, and a reinforcing base cloth 42 attached to the back surface. The reinforcing base cloth 42 is for preventing the S spring 7 and the compression coil spring 6 described later from getting into the cushion pad 4. The cushion pad 4 is made of a material having a high cushioning property such as urethane foam. The seat cover 41 is formed by stitching an outer skin piece made of a plurality of cloths or skins cut into a predetermined shape. The reinforcing base cloth 42 is formed of polyurethane resin that is hardened by impregnating a woven cloth or a non-woven cloth.

  The frame structure 5 includes a seat cushion frame 51 (see FIG. 4) for arranging on the floor of the passenger compartment, a first frame-shaped body 52 and a first frame-shaped body 52 for mounting the cushion pad 4 on the seat cushion frame 51. And two frame-shaped bodies 53.

  The seat cushion frame 51 is formed in a substantially rectangular shape in plan view by connecting the front ends of the left and right side frames 51a and 51b with a front end frame 51c and the rear ends with a rear end frame 51d.

  The first frame-shaped frame 52 is, for example, formed in a substantially rectangular shape so that the cushion pad can be supported by a rod-shaped member, and includes a front frame portion 52a and a pair extending rearward from both ends of the front frame portion 52a. Has a hollow structure including side frame portions 52b and 52c, and fixing portions 52d and 52e provided at the rear ends of the pair of side frame portions 52b and 52c and fixed to a link member 8 described later.

  The second frame-shaped frame 53 is formed of a rod-shaped member in a substantially rectangular shape, and has a middle frame portion 53a, a rear frame portion 53b, and a pair of side frame portions that continuously connect the middle frame portion 53a and the rear frame portion 53b. It has a hollow structure composed of 53c and 53d. The second frame-shaped frame 53 is detachably fixed to the seat cushion frame 51 by, for example, a fitting / removing mechanism of a fitting portion and a protruding portion.

  The first frame-shaped frame 52 and the second frame-shaped frame 53 formed in this way are made of a metal or hard resin rod-shaped member so as to have a rigidity capable of maintaining a substantially rectangular state when a passenger is seated. used.

  Between the first frame-shaped frame 52 and the second frame-shaped frame 53, the compression coil spring 6 that elastically supports the seating load of the seated occupant and the cushion pad 4 in order to suppress the settling An S spring 7 that elastically supports the cushion pad 4 back and forth is arranged.

  For example, two compression coil springs 6 are arranged on the front left and right sides and two rear side left and right sides so that the buttocks of the seated occupant can be elastically supported. Each compression coil spring 6 is sandwiched between the bracket 56 provided on the second frame-shaped frame 53 and the S spring 7. Here, "sandwiching" means to be mounted so as to be sandwiched.

  As is well known, the S spring 7 is provided under the pad for supporting the cushion pad 4 with respect to the frame structure 5 in the vehicle seat, and is a spring in which a steel wire is continuously bent in an S shape. In No. 2, seven sheets are arranged in the width direction of the sheet. The S spring 7 is referred to as S spring 7A, S spring 7B, S spring 7C, S spring 7D, S spring 7E, S spring 7F, and S spring 7G from the upper side (left side of the seat) in FIG.

  Further, each of the S spring 7A, the S spring 7B, the S spring 7C, the S spring 7E, and the S spring 7F has a fish mouth type spring portion 71 formed at the front end toward the frame structure 5. The fish mouth-shaped spring portion 71 is formed by bending a steel wire used for the S spring 7 into a substantially Z shape and bending in the vertical direction, and functions as a bending spring. The fish mouth-shaped spring portion 71 formed on each of the S springs 7A, 7B, 7C, 7E and 7F elastically supports the thigh portion of the seated occupant.

  Further, in order to support the seated occupant in a stable state, it has a substantially U-shape in a plane having two leg portions 81, 82 and a connecting portion 83 continuously connected to one end portion of each leg portion 81, 82. The link member 8 is provided. In the link member 8, both front end portions of both leg portions 81 and 82 are rotatably connected to the second frame-shaped frame 53. That is, the front end portion of one leg portion 81 is rotatably connected to the bracket 54 provided at the intermediate portion in the front-rear direction of the one side frame portion 53c of the second frame-shaped frame 53, and the other leg portion. A front end of 82 is rotatably connected to a bracket 55 provided at an intermediate portion in the front-rear direction of the other side frame 53d of the second frame 53. Such a link member 8 is arranged so as to be rotatable above the second frame-shaped frame 53.

  Such a link member 8 formed in a substantially U-shape in plan view can support a seated occupant in a stable state with roll rigidity by a stabilizer function. The stabilizer function referred to here is similar to the stabilizer function of the stabilizer (anti-roll bar) used to suppress the rolling of the vehicle body, and the lateral vibration generated on the seat cushion due to the seating load of the seated occupant when the vehicle body is turning. This is the function of suppressing movement (twisting).

  The link member 8 thus formed in a generally U-shape in plan view is made of metal or metal so as to have a rigidity capable of maintaining a substantially rectangular state even when the vehicle body is in a turning traveling state when the occupant is seated. A hard resin rod member is used.

  In addition, in the continuous portion 83 located in the direction of the rear frame portion 53b of the second frame-shaped frame 53, a fixing portion provided at the tip of each of the pair of side frame portions 52b and 52c of the first frame-shaped frame 52. 52d and 52e are fixed. The front end of the S spring 7A, S spring 7B, S spring 7C, S spring 7D, S spring 7E, S spring 7F, and S spring 7G is fixed to the front frame portion 52a of the first frame-shaped frame 52. There is. The first frame-shaped frame 52 is located above the link member 8 and the second frame-shaped frame 53.

  Further, rear ends of the S springs 7C, S springs 7D, and S springs 7E are fixed to the connecting portion 83, and the S springs 7A and S springs 7B are attached to one side frame portion 52b of the first frame-shaped frame 52. The rear end is fixed, and the rear ends of the S spring 7F and the S spring 7G are fixed to the other side frame portion 52c of the first frame-shaped frame. Since the S spring 7A, S spring 7B, S spring 7F, and S spring 7G are formed shorter than the S spring 7C, S spring 7D, and S spring 7E, after the S spring 7A, 7B, 7F, and 7G, The pair of side frame portions 52b and 52c of the first frame-shaped frame are formed so that the side ends can be easily fixed.

  In addition, the slide mechanism 9 that slides the lower end portion 71a of each fish mouth-shaped spring portion 71 in the front-rear direction and restricts the movement in the up-down direction includes a pair of side frame portions 53c of the second frame-shaped frame 53. It is provided in each 53d.

  In this sliding mechanism 9, for example, as shown in FIG. 3, a bracket 91 having a long hole 91a whose longitudinal direction is located along the sliding direction of the lower end portion 71a of the fish mouth spring 71 is formed into a second frame shape. A rod-shaped member 92, which is fixed to each of the front side portions of the pair of side frame portions 53c and 53d of the frame 53 and is movable in the sliding direction within the elongated hole 91a, is fixed to the lower end portion 71a of the fish mouth spring portion 71. Has been done. Note that, in FIG. 3, the S spring 7A, the fish mouth shaped spring portion 71 thereof, and the S spring 7D are omitted for convenience.

  2 and 3, two rod-shaped members 92 are arranged apart from each other in the front-back direction, and these rod-shaped members 92 are arranged along the seat width direction. As such rod-shaped members 92, 92, the same material as that of the first frame-shaped frame 52 and the second frame-shaped frame 53 is used.

  Further, the rod-shaped member 92 fixed to the end of the lower end portion 71 a of the fish mouth-shaped spring portion 71 and the rod-shaped member 84 provided between both leg portions 81 and 82 of the link member 8 are connected by the connecting member 10. .. The rod-shaped member 84 of the link member 8 is arranged along the seat width direction.

  The operation of the vehicle seat to which the vehicle seat cushion structure of the present invention thus configured is applied will be described.

  When a portion of the seat cushion 2 that supports the seated occupant's buttocks sinks when the occupant sits on the seat cushion 2, the compression coil spring 6 compresses the seated occupant's seating load, thereby the second frame-shaped frame 53. The link member 8 is rotatably connected to the center of the link point 85, and the link member 8 moves downward in an arc to pull the S spring 7 rearward of the seat. The lower end 71a of 71 can be slid backward by the slide mechanism 9.

  That is, when the link member 8 moves downward in a circular arc, the rod-shaped member 92 fixed to the end of the lower end portion 71a of the fish mouth-shaped spring portion 71 is fixed to the pair of side frame portions 53c and 53d of the second frame-shaped frame 53. Since the rear end can be slid in the elongated hole 91a of the bracket 91, the lower end 71a of the fish mouth spring 71 can be slid in the rear direction. Can be prevented from extending upward.

  As described above, by converting the downward arcuate movement of the link member 8 into the backward linear movement of the lower end portion 71a of the fishmouth-shaped spring portion 71, the restoring elastic force of the fishmouth-shaped spring portion 71 can be exerted. Because it will be. Therefore, the portion supporting the thigh portion of the seat cushion 2 does not rise abnormally from the initial state, so that the fish mouth-shaped spring portion 71 is easily bent and the thigh portion can be prevented from being pressed.

  In addition, if the rod-shaped member 92 fixed to the fish mouth-shaped spring portion 71 and the rod-shaped member 84 provided between both leg portions 81 and 82 of the link member 8 are connected by the connecting member 10, The lower end 71a of the fish mouth spring portion 71 can be pulled backward by the rod-like member 84 of the link member 8 by a predetermined length in accordance with the downward arc movement, so that the load absorption of the fish mouth spring portion 71 is absorbed. The function can be kept good.

  By using as the connecting member 10 a woven fabric base cloth woven of synthetic fibers having low stretchability and high dimensional stability, for example, polyester canvas, to hook the rod-shaped members 84 and 92. Since the ring-shaped locking portion can be formed by sewing, workability is improved, and abnormal noise can be prevented even if the seat bends and interferes with other parts.

  Next, the operating states of the vehicle seat cushion structure of the present invention including the slide mechanism 9 and the connecting member 10 and the conventional vehicle seat cushion structure described in the background art will be described with reference to FIGS. A comparative explanation will be given based on Table 1. 5A and 5B, the solid line portion shows the operating state of the seat cushion structure before sitting, and the broken line shows the operating state of the seat cushion structure after sitting. In addition, in FIGS. 5A and 5B, the upper side of the substantially Z-shaped fish mouth-shaped spring portion 71 is referred to as an upper jaw portion 71U, and the lower side including the lower end portion 71a is referred to as a lower jaw portion 71L. Table 1 shows an operation matrix table of the seat cushion structure.

まず、スライド機構９及び連結部材１０を備えた本発明の車両のシートクッション構造及び従来の車両のシートクッション構造は図５（Ａ）、（Ｂ）、表１に示すように、着座前は、リンク部材８の棒状部材８４の位置はＡ_１、リンク部材８の連設部８３の位置はＢ_１、フィッシュマウス形ばね部７１の上顎部７１Ｕの上部先端点の位置はＣ_１、フィッシュマウス形ばね部７１の下顎部７１Ｌの下部先端点の位置はＤ_１、フィッシュマウス形ばね部７１の下端部７１ａの端末位置はＥ_１、フィッシュマウス形ばね部７１の上顎部７１Ｕの定点はフィッシュマウス形ばね部７１の下端部７１ａの端末位置であるＥ_１の直上であるＰ_１に位置している。

First, as shown in FIGS. 5A and 5B and Table 1, the seat cushion structure of the vehicle of the present invention including the slide mechanism 9 and the connecting member 10 and the seat cushion structure of the conventional vehicle are as follows: The position of the rod member 84 of the link member 8 is A ₁ , the position of the continuous portion 83 of the link member 8 is B ₁ , the position of the upper tip of the upper jaw portion 71U of the fish mouth type spring portion 71 is C ₁ , the fish mouth type. The position of the lower tip of the lower jaw 71L of the spring portion 71 is D ₁ , the terminal position of the lower end 71a of the fishmouth-shaped spring portion 71 is E ₁ , and the fixed point of the upper jaw 71U of the fishmouth-shaped spring portion 71 is the fishmouth-shaped. It is located at P ₁ , which is immediately above E ₁ , which is the terminal position of the lower end portion 71 a of the spring portion 71.

In the seat cushion structure of the vehicle of the present invention including the slide mechanism 9 and the connecting member 10 shown in FIG. 5A, the position of the rod-shaped member 84 of the link member 8 is set by the slide mechanism 9 and the connecting member 10 after sitting. Is A ₂ behind A ₁ and the position of the connecting portion 83 of the link member 8 moves downward from B ₁ to B ₂ behind by arc movement, respectively. Therefore, the lower end portion 71 a of the fish mouth type spring portion 71 is moved. The terminal position of E ₂ from E ₁ to the rear, the position of the lower tip of the lower jaw portion 71L of the fish mouth shaped spring portion 71 from D ₁ to the rear of D ₃ , the upper tip of the upper jaw portion 71U of the fish mouth shaped spring portion 71. since the position of the point can be moved from C ₁ to the rear of the C _3, this fixed point of the upper jaw 71U of the fishmouth-shaped spring section 71 also moves from P ₁ to the rear of P ₃ Can. Since the downward arcuate motion of the link member 8 is converted into the backward linear motion of the lower end portion 71a of the fish mouth spring 71 by the slide mechanism 9 and the connecting member 10, the length L ₁ , E ₂ from A ₁ to A _{2 is} E. The length L ₂ from ₁ to E ₂ and the length L ₃ from D ₁ to D ₃ are the same.

As a result, the fixed point of the upper jaw portion 71U of the fish mouth shaped spring portion 71 can be moved to the position of P ₃ just above E ₁ which is the terminal position of the lower end portion 71a of the fish mouth shaped spring portion 71. The load absorbing function of the mouse-shaped spring portion 71 can be kept good.

On the other hand, in the conventional vehicle seat cushion structure shown in FIG. 5B, after the seating, the position of the rod-shaped member 84 of the link member 8 is A ₂ rearward from A ₁ , and the linking portion 83 of the link member 8 is continuous. Moves from B ₁ to B ₂ in the rear by moving in a circular arc downward, but since the end position of the lower end portion 71a of the fish mouth spring 71 is rotatably connected to the frame structure 5. It remains E ₁ . In this case, the position of the lower tip point of the lower jaw portion 71L of the fish mouth spring 71 moves from D ₁ to D ₂ , but the terminal position of the lower end 71a of the fish mouth spring 71 remains the fixed point position E ₁ . Therefore, the position of D ₂ is in the vicinity of D ₁ .

As a result, the position of the upper tip point of the upper jaw portion 71U of the fish mouth spring portion 71 moves from C ₁ to C _{2 while} being largely tilted rearward, so that the fixed point of the upper jaw portion 71U of the fish mouth spring portion 71 is also fixed. Since it moves from P ₁ to P ₂ which is greatly tilted, it shifts rearward from directly above E ₁ , which is the terminal position of the lower end portion 71a of the fish mouth spring 71. Therefore, it can be confirmed that the S spring 7 is in a sagging state and the portion supporting the thigh portion of the seat cushion 2 is abnormally lifted from the initial state.

  Although the vehicle seat cushion structure of the present invention is applied to the separate seat that is a seat for one person as described above, it is needless to say that the invention is not limited to this and can be applied to a bench seat in which a plurality of people can sit.

  Although the present invention has been described above with reference to the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are exhibited. It goes without saying that any configuration can be adopted.

2 ... Seat cushion 4 ... Cushion pad 5 ... Frame structure 6 ... Compression coil spring 7 ... S spring 71 ... Fish mouth spring 71a ... Lower end 8 ... Link members 81,82 ... Legs 83 ...... Consecutive parts 84 …… Bar-shaped members 9 …… Slide mechanism 91 …… Brackets 91a …… Oval holes

Claims (4)

A cushion pad that is formed to form the outer shape of a seat cushion and elastically supports a seated occupant, and a frame structure that is formed to form the skeleton of the seat cushion and that fixes the cushion pad to the upper portion, A compression coil spring that elastically supports the seating load of the seated occupant between the pad and the frame structure, and an S spring that elastically supports the cushion pad in the front-rear direction in order to suppress the settling of the cushion pad. In the seat cushion structure of the vehicle where and are arranged,
The ends of the two leg portions of the link member having a substantially U-shape in plan view each having two leg portions and a connecting portion continuously provided to one end portion of each leg portion are intermediate in the front-rear direction of the frame structure. The rear end of the S spring is fixed to the connecting portion located rearward of the frame structure, and the rear end of the S spring is fixed to the front end of the S spring. A slide mechanism that slides the lower end of the fish mouth-shaped spring portion formed toward the body in the front-rear direction and restricts the movement in the up-and-down direction is provided at one portion of the frame structure. The vehicle seat cushion structure.   In the sliding mechanism, a bracket having a long hole whose longitudinal direction is located along the sliding direction of the lower end of the fish mouth spring is fixed to one portion of the frame structure, and the bracket is fixed in the long hole. 2. The vehicle seat cushion structure according to claim 1, wherein a rod-shaped member having a size movable in the sliding direction is fixed to the lower end portion of the fish mouth spring portion.   3. The vehicle according to claim 2, wherein the rod-shaped member fixed to the fish mouth spring portion and the rod-shaped member provided between the both leg portions of the link member are connected by a connecting member. Seat cushion structure.   4. The seat cushion structure for a vehicle according to claim 3, wherein the connecting member is a woven base cloth made of a woven synthetic fiber having low stretchability and high dimensional stability.

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