JP2023132136A - seat cushion - Google Patents

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

The present invention relates to a seat cushion.

Patent Document 1 discloses a seat cushion that includes a frame, a support member supported by the frame so as to be located inside the frame, a pad disposed on the frame and the support member, and a skin material covering the pad. The frame includes a pair of left and right side members, a front cross member that connects the front ends of the pair of left and right side members to each other, and a rear cross member that connects the rear ends of the pair of left and right side members to each other. The support member receives the load of an occupant seated on the seat cushion via the skin material and the pad. The support member includes a plate-shaped main body, a front attachment portion, and a rear attachment portion. The front attachment portion extends forward from the front edge of the main body and is hooked onto the front cross member from above. The rear attachment portion extends rearward from the rear edge of the main body and is hooked onto the rear cross member from above. The main body is provided with a locking hole that penetrates in the vertical direction. A hook is provided at the end of the skin material. The hook passes through the locking hole from the bottom to the top and is hooked on the edge of the locking hole.

Japanese Patent Application Publication No. 2020-124975

In the technique disclosed in Patent Document 1, the center portion of the support member tends to sink downward due to the load of the occupant seated on the seat cushion. This is because the load causes the front attachment portion and the rear attachment portion of the support member to rotate in the direction in which they are pulled by the support member. If each of the front attachment part and the rear attachment part is hooked onto the cross member from above, and the hook is hooked into the locking hole so as to pass through the locking hole from the bottom to the top, the front attachment rotation of the rear mounting part and rear mounting part is likely to be facilitated.

If the central portion of the support member sinks downward, it will become uncomfortable to sit on. When a precision instrument is mounted under the seat cushion, if the center portion of the support member sinks downward, there is a risk that the support member will hit the precision instrument. Hereinafter, the support member will be referred to as a panel.

One of the objects of the present invention is to provide a seat cushion that can suppress the sinking of a panel that receives the load of an occupant seated on the seat cushion.

The seat cushion according to one aspect of the present invention includes:
frame and
a panel placed inside the frame;
a cushion pad disposed above the frame and the panel;
and a cover covering the cushion pad,
The frame includes a first shaft and a second shaft spaced apart,
The panel is
a first end rotatably attached to the first shaft;
a second end rotatably attached to the second shaft;
The cover is
a first engaging portion attached to the panel so as to rotate the first end in a direction opposite to a direction in which the first end is rotated by a load of an occupant acting on a center portion of the panel;
and a second engaging 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.

When an occupant sits on the seat cushion, a load acts on the seat cushion in a direction that causes the central portion of the panel and the central portion of the cover to sink downward. In the seat cushion of the present invention, by utilizing the depression of the center part of the cover, it is possible to suppress the depression of the center part of the panel. The sinking of the central portion of the panel generates a rotational force in the positive direction about each shaft at each of the first end and the second end. The central part of the cover sinks when the first engaging part and the second engaging part apply a rotational force in the opposite direction to the above-mentioned forward direction about the respective shafts to each of the first end and the second end. bring about In other words, the force that causes the central portion of the cover to sink rotates the first end portion and the second end portion in a direction that suppresses the sinking of the central portion of the panel. By rotating in the opposite direction as described above, sinking of the central portion of the panel is suppressed. If the center part of the panel does not sink downward, the deterioration of sitting comfort is suppressed. When precision equipment is mounted under the seat cushion, if the center part of the panel does not sink downward, the panel will be prevented from hitting the precision equipment.

FIG. 1 is a schematic diagram of a seat cushion according to an embodiment. FIG. 2 is a schematic perspective view of a frame and a panel included in the seat cushion of the embodiment.

A specific example of the seat cushion of the present invention will be described with reference to the drawings. The same reference numerals in the figures indicate the same names. In each drawing, a part of the configuration may be exaggerated or simplified for convenience of explanation. The dimensional ratio of each part in the drawings may also differ from the actual size. In the figure, arrow FR is the front side in the longitudinal direction of the vehicle, arrow RR is the rear side in the longitudinal direction of the vehicle, arrow RH is the right side in the left-right direction of the vehicle, arrow LH is the left side in the left-right direction of the vehicle, and arrow UP is the height of the vehicle. The upper side in the vertical direction and the arrow LWR indicate the lower side in the height direction of the vehicle.

<Summary>
The seat cushion 1 includes a frame 2, a panel 4, a cushion pad 7, and a cover 8, as shown in FIG. In FIG. 1, a first shaft 21 and a second shaft 22 of the frame 2 are shown. The panel 4 is arranged inside the frame 2 and receives the load 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 a passenger's load acts on the center portion of the panel 4, the first end 41 tries to rotate around the first shaft 21, and the second end 42 tries to rotate around the second shaft 22. One of the features of the seat cushion 1 is that the cover 8 is connected to the panel by the first engaging portion 81 and the second engaging portion 82 so as to suppress rotation of the first end portion 41 and the second end portion 42 due to the above-mentioned load. It is located at the point where it is attached to 4. Each configuration will be explained in detail below. Note that, for convenience of explanation, FIG. 1 is a diagram in which the seat cushion 1 is cut along a vertical plane so as to pass through both the first end 41 and the second end 42. As shown in FIG. A seat back (not shown) is rotatably attached to the rear end of the seat cushion 1.

<Frame>
As shown in FIG. 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 left and right side portions 23, 24. A second shaft 22 is provided that connects the rear end portions of the two. The first shaft 21 and the second shaft 22 are spaced apart from each other. The left and right side portions 23 and 24 are also spaced apart. A panel 4, which will be described later, is arranged inside a rectangular frame made up of the first shaft 21, the second shaft 22, and left and right side parts 23, 24.

Each of the first shaft 21 and the second shaft 22 is, for example, a metal pipe. The side parts 23 and 24 are, for example, metal plates. A pan frame 3 is arranged in front of the first shaft 21. The pan frame 3 is made of a metal plate and has a shape that corresponds to the shape of the front part of the seat surface.

<Panel>
The panel 4 is a member that receives the load of an occupant seated on the seat cushion 1, and elastically rebounds and supports the occupant via a cushion pad 7, which will be described later. The panel 4 of this example is made of resin into which metal wires are insert-molded. The panel 4 may be a plate molded only from resin, or may be a metal plate. The panel 4 may be constructed by knitting highly rigid metal wires or plate materials in a lattice shape.

The panel 4 includes a main body 40, a first end 41, and a second end 42, as shown in FIG.

The main body portion 40 is a portion that mainly receives the load of an occupant seated on the seat cushion 1. The main body 40 has a size slightly smaller than the opening of the frame 2, as shown in FIG. The main body portion 40 has a shape similar to the shape of the opening of the frame 2. The shape of the main body portion 40 in this example is a substantially rectangular plate shape. Although the main body portion 40 is shown in FIG. 2 as a plate without holes for convenience of explanation, it may be provided with holes penetrating the front and back surfaces. This hole is, for example, an air passage.

As shown in FIG. 1, the main body portion 40 of this example is bent at approximately the center in the longitudinal direction of the vehicle. The rear portion of the main body portion 40 from the bent portion is approximately horizontal. A portion of the main body portion 40 in front of the bent portion is inclined upward as it goes forward from the bent portion. The front edge of the main body portion 40 is located at a higher position than the rear edge.

The first end portion 41 is a portion rotatably attached to the first shaft 21. The first end portion 41 in this example is configured to extend forward from a portion of the front edge of the main body portion 40, as shown in FIG. The first end portion 41 in this example is provided at one location approximately in the center of the front edge of the main body portion 40 . The first end portion 41 may be provided at a plurality of locations on the front end of the main body portion 40 at intervals. The size and number of the first end portions 41 are appropriately selected so that they can be attached to the first shaft 21.

The first end portion 41 is an arcuate curved piece along the outer peripheral surface of the first shaft 21 . The first end portion 41 in this example is attached to the first shaft 21 from above, as shown in FIG. The first end portion 41 in this example is arranged to cover the upper half of the first shaft 21 . An edge of the first end 41 is located at the front of the first shaft 21 .

A hook-shaped projection 61 is provided at the tip of the first end portion 41, as shown in FIG. The protrusion 61 in this example is a protrusion with a substantially U-shaped cross section. The protrusion 61 protrudes forward from the front-facing surface of the first end 41 and is further bent upward and backward.

The second end portion 42 is a portion rotatably attached to the second shaft 22. The second end portion 42 in this example is configured to extend rearward from a portion of the rear edge of the main body portion 40, as shown in FIG. The second end portions 42 in this example are provided at two locations sandwiching the center portion of the rear edge of the main body portion 40 . The second end portion 42 may 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 the extent that they can be attached to the second shaft 22.

The second end portion 42 is a C-shaped curved piece along the outer peripheral surface of the second shaft 22 . The second end portion 42 in this example is connected to the main body portion 40 via a connecting portion 45. The connecting portions 45 are provided so as to extend rearward from two locations on the rear edge of the main body portion 40 . The shape of the connecting portion 45 is not particularly limited. The shape of the connecting portion 45 in this example is linear. A second end portion 42 made of a curved piece is provided at the tip of the connecting portion 45 . As shown in FIG. 1, the second end portion 42 of this example is attached so as to pass below the second shaft 22 and be wound around the second shaft 22 from below to above. The second end portion 42 in this example is arranged so as to go around the second shaft 22 approximately once. The edge of the second end 42 is located at the front of the second shaft 22.

As shown in FIG. 1, a hook-shaped projection 62 is provided at the tip of the second end portion 42. As shown in FIG. The protrusion 62 in this example is a protrusion with a substantially U-shaped cross section. The protrusion 62 protrudes downward from the downwardly facing tip surface of the second end 42 and is further bent upward and forward.

In the panel 4, when an occupant is seated, the main body portion 40 sinks downward due to the occupant's load. Due to this sinking of the main body part 40, the first end part 41 and the second end part 42 try to rotate about the respective shafts 21 and 22 in the direction in which they are pulled by the main body part 40. The direction of rotation at this time is the direction of the black arrow shown in FIG. 1, which is the clockwise direction in FIG.

<Cushion pad>
The cushion pad 7 is arranged above the frame 2, pan frame 3, and panel 4, as shown in FIG. The cushion pad 7 constitutes a seat portion that supports the buttocks of the occupant. The cushion pad 7 is made of an elastic material such as polyurethane foam.

<Cover>
The cover 8 is a skin material that covers the cushion pad 7, as shown in FIG. The cover 8 includes a main body part 80, a first engaging part 81, and a second engaging part 82.

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

Each of the first engaging portion 81 and the second engaging portion 82 is provided at opposing ends of the unfolded cover 8. In this example, the first engaging portion 81 is provided at the front end of the cover 8, and the second engaging portion 82 is provided at the rear end of the cover 8. The first engaging portion 81 and the second engaging portion 82 are arranged apart from each other below the cushion pad 7 in the parallel direction of the first shaft 21 and the second shaft 22.

The first engaging portion 81 is provided at an end portion of the main body portion 80 that wraps around from the front surface of the cushion pad 7 to the lower surface. The first engaging portion 81 is a J-shaped hook that is hooked onto the protrusion 61 provided on the first end portion 41 . The first engaging portion 81 in this example is provided at one location approximately in the center of the front end of the main body portion 80, corresponding to the position of the protrusion 61. The first engaging portion 81 rotates 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. is attached to. In this example, when the seat cushion 1 is viewed from above or below, the end portion of the main body portion 80 provided with the first engaging portion 81 does not overlap the first end portion 41, and the first end portion 41 are placed facing each other with their forward facing surfaces facing each other. The first engaging portion 81 in this example is hooked onto the protrusion 61 from the front of the first shaft 21 .

The second engaging portion 82 is provided at the end of the main body portion 80 extending from the rear surface of the cushion pad 7 to the lower surface. The second engaging portion 82 is a J-shaped hook that is hooked onto the protrusion 62 provided on the second end portion 42 . The second engaging portion 82 in this example is provided corresponding to the position of the protrusion 62. In this example, the second end portions 42 are provided at two locations, and two second engaging portions 82 are attached to each location. The two second engaging portions 82 at each location are attached so as to sandwich the connecting portion 45 . The second engaging portion 82 rotates the second end 42 in a direction opposite to the direction in which the second end 42 is rotated by the load of the occupant acting on the main body 40 of the panel 4. is attached to. In this example, when the seat cushion 1 is viewed from above or below, the end of the main body 80 provided with the second engaging portion 82 overlaps the second end 42 . The second engaging portion 82 in this example is hooked onto the protrusion 62 from below the second shaft 22 .

In the cover 8, when the occupant is seated, the area of the main body portion 80 that covers the upper surface of the cushion pad 7 sinks downward due to the load of the occupant. This sinking of the main body portion 80 causes the first engaging portion 81 and the second engaging portion 82 to be pulled apart from each other. In this example, the direction in which the first engaging portion 81 and the second engaging portion 82 separate from each other is the longitudinal direction of the vehicle. When the first engaging portion 81 is pulled, a force is applied that rotates the first end portion 41 in a direction opposite to the direction in which the first end portion 41 is rotated by the above-mentioned load. When the second engaging portion 82 is pulled, a force is applied that rotates the second end 42 in a direction opposite to the direction in which the second end 42 is rotated by the load. In other words, when the first engaging part 81 and the second engaging part 82 are pulled, the first end part 41 and the second end part 42 move the main body part 40 forward and backward of the vehicle around the respective shafts 21 and 22. It tries to rotate in the direction of pulling. The direction of rotation at this time is the direction of the white arrow shown in FIG. 1, which is the counterclockwise direction in FIG.

<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 arrow shown in FIG. 1 about the respective shafts 21 and 22 at each of the first end portion 41 and the second end portion 42 . The main body part 80 of the cover 8 sinks by the first engaging part 81 and the second engaging part 82, and the first end part 41 and the second end part 42 are caused to sink around the shafts 21 and 22, respectively, as shown in FIG. A rotational force is generated in the direction of the white arrow shown in . The direction of the black arrow and the direction of the white arrow shown in FIG. 1 are opposite directions. As a result, each of the first end portion 41 and the second end portion 42 is difficult to rotate in either the direction of the black arrow or the direction of the white arrow shown in FIG. Since each of the first end portion 41 and the second end portion 42 is difficult to rotate, the main body portion 40 of the panel 4 is difficult to sink downward, and the initial state of the panel 4 is easily maintained.

In the rotation in the direction of the black arrow shown in FIG. 1, the first end 41 attached to the outer periphery of the first shaft 21 is rotated in the direction in which it is to be wound around the first shaft 21. This rotation suppresses rotation in a direction in which the first end portion 41 tends to come off the first shaft 21 . In the rotation in the direction of the white arrow shown in FIG. 1, the second end 42 attached to wrap around the outer periphery of the second shaft 22 is rotated in the direction in which it is further wound around the second shaft 22. . This rotation prevents the second end portion 42 from rotating in a direction in which it tends to come off the second shaft 22 .

The present invention is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all changes within the meaning and scope equivalent to the scope of the claims. For example, if the cover is attached to the panel by the first engaging part and the second engaging part so as to suppress each rotation of the first end part and the second end part due to load, the following changes are possible. .

(1) Each structure of the first end portion 41 and the first engaging portion 81 located at the front in FIG. It may be a configuration in which: The first end portion 41 may be arranged to pass below the first shaft 21 and be wound around the first shaft 21 from below to above. In this case, the edge of the first end 41 is preferably located at the rear of the first shaft 21. The tip of the first end 41 is preferably provided with a hook-shaped protrusion that protrudes downward from the downwardly facing tip surface of the first end 41 and is further bent upward and backward. Regarding the cover 8, when the seat cushion 1 is viewed from above or below, the end of the main body part 80 provided with the first engaging part 81 overlaps the first end part 41, and the first engaging part 81 overlaps with the first end part 41. It is preferable that the first shaft 21 be hooked onto the protrusion from below.

(2) Each structure of the second end portion 42 and the second engaging portion 82 located at the rear in FIG. It may be a configuration in which: The second end portion 42 may be disposed upward from the front of the second shaft 22 to cover the upper half 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 is preferably provided with a hook-shaped protrusion that protrudes rearward from the rearward-facing surface of the second end 42 and is bent upward and forward. The second engaging portion 82 is preferably hooked onto the protrusion from the rear of the second shaft 22 .

(3) The left and right sides of the frame may be constructed of metal pipes, and a panel may be rotatably attached to each side. In this case, it is preferable that protrusions are provided on the panels attached to each side, and that the cover is provided with an engaging portion that catches on the protrusions. The structure of the protrusion provided on the panel and the engaging part provided on the cover may be the same as the first end part 41 and the first engaging part 81 located at the front in FIG. 1, or the second end located at the rear in FIG. The same configuration as the end portion 42 and the second engaging portion 82 can be applied.

(4) At least one of the first engaging part and the second engaging part may be attached to the main body of the panel.

1 Seat cushion 2 Frame 21 First shaft, 22 Second shaft, 23, 24 Side part 3 Pan frame 4 Panel 40 Main body part 41 First end part, 42 Second end part, 45 Connecting part 61, 62 Projection 7 Cushion pad 8 Cover 80 Main body part 81 First engaging part, 82 Second engaging part

Claims (1)

frame and
a panel placed inside the frame;
a cushion pad disposed above the frame and the panel;
and a cover covering the cushion pad,
The frame includes a first shaft and a second shaft spaced apart,
The panel is
a first end rotatably attached to the first shaft;
a second end rotatably attached to the second shaft;
The cover is
a first engaging portion attached to the panel so as to rotate the first end in a direction opposite to a direction in which the first end is rotated by a load of an occupant acting on a center portion of the panel;
a second engaging part 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;
seat cushion.

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