seat cushion

Abstract

To provide a seat cushion which can suppress sinking of a support member receiving a load of an occupant seated on the seat cushion.SOLUTION: A seat cushion includes a frame, a panel arranged inside the frame, a cushion pad arranged above the frame and the panel, and a cover covering the cushion pad, wherein the frame has a first shaft and a second shaft arranged at an interval, the panel includes a first end rotatably mounted on the first shaft and a second end rotatably mounted on the second shaft, and the cover includes a first engagement part which is mounted on the panel so as to rotate the first end in the reverse direction to a rotation at which the first end is rotated by a load of an occupant acting on the central part of the panel, and a second engagement part which is mounted on the panel so as to rotate the second end in the reverse direction to a direction at which the second end is rotated by the load.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seat cushion. [Background technology]

[0002] Patent Document 1 discloses a seat cushion including a frame, a support member supported by the frame so as to be positioned inside the frame, a pad disposed on the frame and the support member, and a skin covering the pad. The frame includes a pair of left and right side members, a front cross member connecting the front ends of the pair of left and right side members, and a rear cross member connecting the rear ends of the pair of left and right side members. The support member bears the weight of an occupant seated on the seat cushion via the skin and the pad. The support member includes a plate-shaped main body, a front mounting portion, and a rear mounting portion. The front mounting portion extends forward from the front edge of the main body and is hooked from above onto the front cross member. The rear mounting portion extends rearward from the rear edge of the main body and is hooked from above onto the rear cross member. The main body has a locking hole penetrating in the vertical direction. A hook is provided at the end of the skin. The hook passes through the locking hole from bottom to top and is hooked onto the edge of the locking hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-124975 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology of Patent Document 1, the weight of an occupant seated on the seat cushion tends to cause the center of the support member to sink downward. This is because the load causes the front and rear mounting portions of the support member to rotate in the direction in which they are pulled by the support member. If the front and rear mounting portions are each hooked onto the cross member from above and the hooks are hooked into the locking holes so that they pass through from the bottom to the top, the rotation of the front and rear mounting portions is likely to be accelerated.

[0005] If the center of the support member sinks downward, it will be uncomfortable to sit on. If a precision instrument is installed under the seat cushion, the support member may hit the precision instrument if the center of the support member sinks downward. Hereinafter, the support member will be referred to as the panel.

[0006] An object of the present invention is to provide a seat cushion that can suppress sinking of a panel that receives the load of an occupant seated on the seat cushion. [Means for solving the problem]

[0007] A seat cushion according to one aspect of the present invention includes: The frame and a panel disposed inside the frame; a cushion pad disposed above the frame and the panel; a cover covering the cushion pad, the frame includes a first shaft and a second shaft spaced apart; The panel comprises: a first end rotatably attached to the first shaft; a second end rotatably attached to the second shaft; The cover is a first engagement portion attached to the panel so as to rotate the first end portion in a direction opposite to a direction in which the first end portion is rotated by a load of an occupant acting on a central portion of the panel; a second engagement portion attached to the panel so as to rotate the second end in a direction opposite to the direction in which the second end is rotated by the load; [Effects of the Invention]

[0008] When an occupant sits on the seat cushion, a load acts on the seat cushion in a direction that causes the center of the panel and the center of the cover to sink downward. The seat cushion of the present invention can prevent the center of the panel from sinking by utilizing the sinking of the center of the cover. The sinking of the center of the panel generates a rotational force in the forward direction around each of the shafts at the first end and the second end. The sinking of the center of the cover generates a rotational force in the opposite direction to the forward direction at each of the first end and the second end, around each of the shafts, by the first engaging portion and the second engaging portion. In other words, the force of the sinking of the center of the cover rotates the first end and the second end in a direction that prevents the sinking of the center of the panel. The rotation in the opposite direction prevents the center of the panel from sinking downward. If the center of the panel is less likely to sink downward, deterioration of seating comfort is prevented. If a precision instrument is installed under the seat cushion, the resistance of the center of the panel to sink downward prevents the panel from hitting the precision instrument. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram of a seat cushion according to an embodiment. [Figure 2] FIG. 2 is a schematic perspective view of a frame and a panel provided in the seat cushion of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Specific examples of the seat cushion of the present invention will be described with reference to the drawings. The same reference numerals in the drawings indicate the same items. For ease of explanation, some components may be exaggerated or simplified in the drawings. The dimensional ratios of the various components in the drawings may also differ from the actual ratios. In the drawings, the arrow FR indicates the front side in the longitudinal direction of the vehicle, the arrow RR indicates the rear side in the longitudinal direction of the vehicle, the arrow RH indicates the right side in the lateral direction of the vehicle, the arrow LH indicates the left side in the lateral direction of the vehicle, the arrow UP indicates the upper side in the height direction of the vehicle, and the arrow LWR indicates the lower side in the height direction of the vehicle.

[0011] <Summary> As shown in FIG. 1 , the seat cushion 1 includes a frame 2, a panel 4, a cushion pad 7, and a cover 8. FIG. 1 shows a first shaft 21 and a second shaft 22 of the frame 2. The panel 4 is disposed inside the frame 2 and bears the weight of an occupant seated on the seat cushion 1. The panel 4 includes a first end 41 rotatably attached to the first shaft 21 and a second end 42 rotatably attached to the second shaft 22. When the weight of the occupant acts on the center portion of the panel 4, the first end 41 tends to rotate around the first shaft 21, and the second end 42 tends to rotate around the second shaft 22. One feature of the seat cushion 1 is that the cover 8 is attached to the panel 4 by a first engagement portion 81 and a second engagement portion 82 so as to suppress the rotation of the first end 41 and the second end 42 due to the load. Each component will be described in detail below. For ease of explanation, FIG. 1 is a vertical cross-sectional view of the seat cushion 1, passing through both the first end 41 and the second end 42. A seat back (not shown) is rotatably attached to the rear end of the seat cushion 1.

[0012] <frame> As shown in Figure 2, the frame 2 includes left and right side portions 23, 24 extending in the longitudinal direction of the vehicle, a first shaft 21 connecting the front ends of the left and right side portions 23, 24, and a second shaft 22 connecting the rear ends of the left and right side portions 23, 24. The first shaft 21 and the second shaft 22 are disposed at an interval. The left and right side portions 23, 24 are also disposed at an interval. A panel 4, which will be described later, is disposed inside a rectangular frame formed by the first shaft 21, the second shaft 22, and the left and right side portions 23, 24.

[0013] Each of the first shaft 21 and the second shaft 22 is, for example, a metal pipe. The side portions 23, 24 are, for example, metal plates. A pan frame 3 is disposed in front of the first shaft 21. The pan frame 3 is made of a metal plate and has a shape corresponding to the shape of the front portion of the seat surface.

[0014] <Panel> The panel 4 is a member that receives the weight of an occupant seated on the seat cushion 1 and elastically rebounds to support the occupant via a cushion pad 7, which will be described later. The panel 4 in this example is made of resin with metal wires insert-molded. The panel 4 may be a plate molded only from resin, or may be a metal plate. The panel 4 may also be made by weaving highly rigid metal wires or plates in a lattice pattern.

[0015] As shown in FIG. 2, the panel 4 includes a main body 40, a first end 41, and a second end .

[0016] The main body portion 40 is a portion that mainly bears the weight of an occupant seated on the seat cushion 1. As shown in FIG. 2, the main body portion 40 is slightly smaller than the opening of the frame 2. The main body portion 40 has a shape that is similar to the shape of the opening of the frame 2. In this example, the main body portion 40 has a substantially rectangular plate shape. For ease of explanation, the main body portion 40 is shown in FIG. 2 as a plate material without holes, but may have holes that penetrate through the front and back surfaces. These holes are, for example, air passages.

[0017] As shown in Figure 1, the main body 40 of this example is bent at approximately the center in the vehicle's fore-and-aft direction. The portion of the main body 40 rearward of the bent portion is approximately horizontal. The portion of the main body 40 forward of the bent portion is inclined upward as it moves forward from the bent portion. The front edge of the main body 40 is located higher than the rear edge.

[0018] The first end portion 41 is a portion that is rotatably attached to the first shaft 21. In this example, the first end portion 41 is configured to extend forward from a portion of the front edge of the main body portion 40, as shown in FIG. 2. In this example, the first end portion 41 is provided at one location in the approximate center of the front edge of the main body portion 40. The first end portion 41 may be provided at multiple locations spaced apart on the front end of the main body portion 40. The size and number of the first end portions 41 are appropriately selected to an extent that they can be attached to the first shaft 21.

[0019] The first end portion 41 is an arc-shaped curved piece that follows the outer circumferential surface of the first shaft 21. As shown in FIG. 1 , the first end portion 41 of this example is attached to the first shaft 21 from above. The first end portion 41 of this example is disposed so as to cover the upper half of the first shaft 21. The edge of the first end portion 41 is located in front of the first shaft 21.

[0020] 1, a hook-shaped protrusion 61 is provided at the tip of the first end portion 41. In this example, the protrusion 61 is a protruding piece with a substantially U-shaped cross section. The protrusion 61 protrudes forward from the front-facing surface of the first end portion 41 and is further bent upward and backward.

[0021] The second end portion 42 is a portion that is rotatably attached to the second shaft 22. In this example, the second end portion 42 is configured to extend rearward from a part of the rear edge of the main body portion 40, as shown in FIG. 2 . In this example, the second end portions 42 are provided at two locations on either side of the center of the rear edge of the main body portion 40. The second end portion 42 may also be provided at one location approximately in the center of the rear edge of the main body portion 40. The size and number of each second end portion 42 are appropriately selected to an extent that they can be attached to the second shaft 22.

[0022] The second end 42 is a C-shaped curved piece that follows the outer circumferential surface of the second shaft 22. In this example, the second end 42 is connected to the main body 40 via a connecting portion 45. The connecting portion 45 is provided so as to extend rearward from two points on the rear edge of the main body 40. The shape of the connecting portion 45 is not particularly limited. In this example, the connecting portion 45 is linear. The second end 42, which is a curved piece, is provided at the tip of the connecting portion 45. As shown in FIG. 1 , the second end 42 in this example is attached so as to pass below the second shaft 22 and be wrapped around the second shaft 22 from below to above. In this example, the second end 42 is arranged so as to go around the second shaft 22 approximately once. The edge of the second end 42 is located in front of the second shaft 22.

[0023] 1, a hook-shaped protrusion 62 is provided at the tip of the second end 42. In this example, the protrusion 62 is a protruding piece with a substantially U-shaped cross section. The protrusion 62 protrudes downward from the tip surface of the second end 42 facing downward, and is then bent upward and forward.

[0024] When an occupant is seated on the panel 4, the main body 40 sinks downward due to the weight of the occupant. This sinking of the main body 40 causes the first end 41 and the second end 42 to rotate around the shafts 21 and 22 in the direction in which they are pulled by the main body 40. The direction of rotation at this time is the direction of the black arrow shown in FIG. 1, which is a clockwise direction in FIG. 1.

[0025] <Cushion pad> As shown in Fig. 1, the cushion pad 7 is disposed above the frame 2, the pan frame 3, and the panel 4. The cushion pad 7 forms a seating surface that supports the buttocks of the occupant. The cushion pad 7 is made of an elastic material such as polyurethane foam.

[0026] <Cover> 1, the cover 8 is a surface material that covers the cushion pad 7. The cover 8 includes a main body portion 80, a first engagement portion 81, and a second engagement portion .

[0027] The main body 80 is a sheet material that covers the cushion pad 7. The main body 80 continuously covers the area spanning the upper surface, each side surface, and lower surface of the cushion pad 7. The material of the main body 80 is, for example, fabric or leather.

[0028] The first engagement portion 81 and the second engagement portion 82 are provided at opposing ends of the unfolded cover 8. In this example, the first engagement portion 81 is provided at the front end of the cover 8, and the second engagement portion 82 is provided at the rear end of the cover 8. The first engagement portion 81 and the second engagement portion 82 are arranged below the cushion pad 7 and spaced apart in the parallel direction of the first shaft 21 and the second shaft 22.

[0029] The first engagement portion 81 is provided at an end of the main body portion 80 that extends from the front surface to the underside of the cushion pad 7. The first engagement portion 81 is a J-shaped hook that is hooked onto the protrusion 61 provided on the first end portion 41. In this example, the first engagement portion 81 is provided at a location approximately in the center of the front end portion of the main body portion 80, corresponding to the position of the protrusion 61. The first engagement portion 81 is attached to the first end portion 41 so as to rotate the first end portion 41 in a direction opposite to the direction in which the first end portion 41 is rotated by the load of the occupant acting on the main body portion 40 of the panel 4. In this example, when the seat cushion 1 is viewed in plan from above or below, the end of the main body portion 80 on which the first engagement portion 81 is provided is disposed opposite the surface of the first end portion 41 that faces forward without overlapping the first end portion 41. In this example, the first engagement portion 81 is hooked onto the protrusion 61 from the front of the first shaft 21.

[0030] The second engagement portion 82 is provided at an end of the main body portion 80 that extends from the rear surface of the cushion pad 7 around to the underside. The second engagement portion 82 is a J-shaped hook that hooks onto the protrusion 62 provided on the second end portion 42. In this example, the second engagement portion 82 is provided to correspond to the position of the protrusion 62. In this example, the second end portion 42 is provided at two locations, and two second engagement portions 82 are attached to each location. The two second engagement portions 82 at each location are attached so as to sandwich the connecting portion 45. The second engagement portions 82 are attached to the second end portion 42 so as to rotate the second end portion 42 in a direction opposite to the direction in which the second end portion 42 rotates due to the load of the occupant acting on the main body portion 40 of the panel 4. In this example, when the seat cushion 1 is viewed in plan from above or below, the end of the main body portion 80 where the second engagement portion 82 is provided overlaps the second end portion 42. In this example, the second engagement portion 82 hooks onto the protrusion 62 from below the second shaft 22.

[0031] When an occupant sits on the cover 8, the area of ​​the main body portion 80 that covers the upper surface of the cushion pad 7 sinks downward due to the weight of the occupant. This sinking of the main body portion 80 pulls the first engagement portion 81 and the second engagement portion 82 in directions away from each other. In this example, the direction in which the first engagement portion 81 and the second engagement portion 82 move away from each other is the longitudinal direction of the vehicle. When the first engagement portion 81 is pulled, a force acts to rotate the first end portion 41 in a direction opposite to the direction in which the first end portion 41 is rotated by the load. When the second engagement portion 82 is pulled, a force acts to rotate the second end portion 42 in a direction opposite to the direction in which the second end portion 42 is rotated by the load. In other words, when the first engagement portion 81 and the second engagement portion 82 are pulled, the first end portion 41 and the second end portion 42 attempt to rotate around the respective shafts 21 and 22 in a direction that pulls the main body portion 40 in the longitudinal direction of the vehicle. The rotation direction at this time is the direction of the white arrow shown in FIG. 1, which is the counterclockwise direction in FIG.

[0032] <effect> When an occupant sits on the seat cushion 1, a load acts on the seat cushion 1 in a direction that causes the main body portion 40 of the panel 4 and the main body portion 80 of the cover 8 to sink downward. The sinking of the main body portion 40 of the panel 4 generates a rotational force in the direction of the black arrows shown in FIG. 1 around the shafts 21 and 22 in the first end portion 41 and the second end portion 42, respectively. The sinking of the main body portion 80 of the cover 8 generates a rotational force in the direction of the white arrows shown in FIG. 1 around the shafts 21 and 22 in the first end portion 41 and the second end portion 42, respectively, through the first engagement portion 81 and the second engagement portion 82. The directions of the black arrows and the white arrows shown in FIG. 1 are opposite to each other. As a result, the first end portion 41 and the second end portion 42 are unlikely to rotate in either the direction of the black arrows or the direction of the white arrows shown in FIG. 1. Since the first end 41 and the second end 42 are each difficult to rotate, the main body 40 of the panel 4 is less likely to sink downward, and the initial state of the panel 4 is more likely to be maintained.

[0033] 1, first end 41 attached to the outer periphery of first shaft 21 is rotated in a direction in which it attempts to be wound around first shaft 21. This rotation prevents first end 41 from rotating in a direction in which it attempts to detach from first shaft 21. When rotating in the direction of the open arrow shown in FIG. 1, second end 42 attached so as to be wound around the outer periphery of second shaft 22 is rotated in a direction in which it attempts to be further wound around second shaft 22. This rotation prevents second end 42 from rotating in a direction in which it attempts to detach from second shaft 22.

[0034] The present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims. For example, if the cover is attached to the panel by the first engaging portion and the second engaging portion so as to prevent each of the first end and the second end from rotating due to a load, the following modifications are possible.

[0035] (1) The first end 41 and the first engagement portion 81 located in the front of FIG. 1 may be configured symmetrically with respect to the second end 42 and the second engagement portion 82 located in the rear of FIG. 1 . The first end 41 may be disposed so as to pass below the first shaft 21 and be wrapped around the first shaft 21 from below to above. In this case, the edge of the first end 41 may be located behind the first shaft 21. The tip of the first end 41 may be provided with a hook-shaped protrusion that protrudes downward from the tip surface of the first end 41 facing downward and further bends upward and rearward. With regard to the cover 8, when the seat cushion 1 is viewed in plan from above or below, the end of the main body portion 80 provided with the first engagement portion 81 may overlap the first end 41, and the first engagement portion 81 may be hooked onto the protrusion from below the first shaft 21.

[0036] (2) The second end 42 and the second engagement portion 82 located at the rear in FIG. 1 may be configured symmetrically with respect to the first end 41 and the first engagement portion 81 located at the front in FIG. 1. The second end 42 may be arranged to cover the upper half of the second shaft 22 from the front to the top of the second shaft 22. In this case, the edge of the second end 42 may be located at the rear of the second shaft 22. The tip of the second end 42 may be provided with a hook-shaped protrusion that protrudes rearward from the rear-facing surface of the second end 42 and is further bent upward and forward. The second engagement portion 82 may be hooked onto the protrusion from the rear of the second shaft 22.

[0037] (3) The left and right sides of the frame may be made of metal pipes, and panels may be rotatably attached to each side. In this case, protrusions may be provided on the panels attached to each side, and engaging portions that hook onto these protrusions may be provided on the cover. The configuration of the protrusions on the panels and the engaging portions on the cover may be the same as the first end 41 and first engaging portion 81 located in the front of FIG. 1, or the same as the second end 42 and second engaging portion 82 located in the rear of FIG. 1.

[0038] (4) At least one of the first engaging portion and the second engaging portion may be attached to the main body portion of the panel. [Explanation of symbols]

[0039] 1 seat cushion 2 frames 21 first shaft, 22 second shaft, 23, 24 side portions 3 Pan Frame 4 Panels 40 Main body 41 First end, 42 Second end, 45 Connection part 61,62 protrusion 7 cushion pads 8 Cover 80 Main body 81 First engaging part, 82 Second engaging part

Claims

[Claim 1] The frame and a panel disposed inside the frame; a cushion pad disposed above the frame and the panel; a cover covering the cushion pad, the frame includes a first shaft and a second shaft spaced apart; The panel comprises: a first end rotatably attached to the first shaft; a second end rotatably attached to the second shaft; The cover is a first engagement portion attached to the panel so as to rotate the first end portion in a direction opposite to a direction in which the first end portion is rotated by a load of an occupant acting on a central portion of the panel; a second engagement portion attached to the panel so as to rotate the second end portion in a direction opposite to a direction in which the second end portion is rotated by the load, Seat cushion.

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