Seat cushion

Abstract

To provide a seat cushion capable of suppressing increase of the number of component parts, and maintaining a compact state.SOLUTION: A seat cushion 1 comprises: a first cushion 10 which comprises a seating surface 11A being arranged on a seat part 91 of a seat 9 and facing a person who is seated on the seat, and a mounting surface 11B facing the seat part 91; and a second cushion 20 arranged on a backrest 92. The first cushion 10 comprises: a first band 12 extending from a left side part and having a first fixing part 14 fixed to a right side part; and a first fixed part 15 which is detachably engaged to the first fixing part 14. The first band 12 can engage the first fixing part 14 to the first fixed part 15 in a state in which the second cushion 20 is sandwiched between itself and the seating surface 11A in a storage state of the seat cushion 1, and can engage the first fixing part 14 to the first fixed part 15 in a state in which the seat part 91 is sandwiched between itself and the mounting surface 11B in a state in which the seat cushion 1 is arranged at the seat part 91.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a seat cushion that is disposed in a seat having a seat portion and a backrest. [Background technology]

[0002] Conventionally, a seat cushion is known that includes a first cushion placed on the seat of a chair or the like, and a second cushion placed on the backrest of the seat (Patent Document 1). In this technology, the second cushion has one end of a number of fastening belts sewn to opposing positions on the left and right sides, and can be fixed by wrapping it around the back of the backrest with hook-and-loop fasteners attached to the other ends of the fastening belts. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-296737 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, it is desirable for the seat cushion to be compact when it is removed from the seat and then carried or stored, and to be able to maintain that state. However, providing fasteners or the like to maintain the compact state increases the number of components, which is a problem.

[0005] Therefore, an object of the present invention is to provide a seat cushion that can be maintained in a compact state while suppressing an increase in the number of components. Another object is to make it easier to store and install the seat cushion. Another object of the present invention is to introduce a system that uses sensors easily. Another object is to make the sensor positions easier to understand. Another object is to protect the wiring connected to the sensor. Another object of the present invention is to more reliably fix the seat cushion to the seat. [Means for solving the problem]

[0006] A seat cushion for achieving the above-mentioned object is a seat cushion that is placed on a seat having a seat portion and a backrest, the seat cushion comprising: a first cushion that is placed on the seat portion and has a seating surface facing a seat occupant and a support surface facing the seat portion; and a second cushion that is placed on the backrest, the first cushion having a first band extending from one of a right side and a left side of the first cushion and having a first fixed part fixed to the other of the right side and the left side, and a first fixed part that detachably engages with the first fixed part, the first band being capable of engaging with the first fixed part when the second cushion is sandwiched between the first band and the seating surface when the seat cushion is in a stored state, and the first fixed part being capable of engaging with the first fixed part when the seat cushion is placed on the seat portion and the seat portion is sandwiched between the first band and the support surface.

[0007] According to this configuration, the seat cushion can be stored in a compact manner and fixed to the seat cushion by the first band having the first fixing portion and the first fixed portion detachably engaging with the first fixing portion, thereby making it possible to maintain a compact state while suppressing an increase in the number of components.

[0008] In the above-mentioned seat cushion, the first cushion may further have a first auxiliary band extending from the other of the right side portion and the left side portion, and the first fixed portion may be provided on the first auxiliary band.

[0009] According to this, since the first fixing portion can be easily engaged with the first fixed portion, the operation of storing and attaching the seat cushion can be easily performed.

[0010] In the above-described seat cushion, the first cushion and the second cushion may each have a sensor for detecting the seated occupant.

[0011] This makes it possible to easily introduce a system that utilizes sensors by simply placing a seat cushion on an existing chair or the like.

[0012] In the above-mentioned seat cushion, the sensor may be a pressure sensor.

[0013] In the above-described seat cushion, the first cushion and the second cushion have a cover member, each of the cover members having a first line consisting of a stitch extending in the left-right direction and a second line consisting of a stitch extending in a direction intersecting the left-right direction, and the sensor can be configured to be disposed at a position where the first line and the second line intersect.

[0014] This makes it possible to easily identify the position of the sensor.

[0015] The seat cushion may further include a first wiring connected to a sensor of the second cushion, the first wiring extending from the second cushion, and a cover that encases and covers the first wiring and the pillar when the second cushion is placed on the backrest, with the first wiring aligned along the pillar of the backrest.

[0016] According to this, the first wiring connected to the sensor can be protected by the cover.

[0017] The seat cushion further includes a control device connected to a sensor of the first cushion and a sensor of the second cushion, and the first band can be configured so that when the seat cushion is placed on the seat and the control device is placed under the seat, the first fixing portion can engage with the first fixed portion when the seat and the control device are sandwiched between the first band and the support surface.

[0018] According to this, the control device can be fixed to the seat cushion by the first band, which makes it possible to suppress an increase in the number of components.

[0019] In the above-described seat cushion, the second cushion may have a second band extending from an upper end, the second band having a second fixing portion fixed to a lower end of the second cushion, a second fixed portion with which the second fixing portion removably engages, and an opposing surface facing the backrest, and the second band may be configured to engage with the second fixed portion while sandwiching the backrest between the second band and the opposing surface.

[0020] According to this, the second cushion can be fixed to the backrest of the seat, thereby enabling the seat cushion to be more reliably fixed to the seat.

[0021] In the above-described seat cushion, the second cushion may further include a second auxiliary band extending from a lower end thereof, and the second fixed portion may be provided on the second auxiliary band.

[0022] According to this, the second fixing portion can be easily engaged with the second fixed portion, so that the installation work of the seat cushion can be easily performed.

[0023] In the above-described seat cushion, the first fixing portion and the first fixed portion may form a slide fastener, and the slide fastener may have a double-sided slider. Effect of the Invention

[0024] According to the present invention, it is possible to maintain a compact state while suppressing an increase in the number of components.

[0025] Furthermore, by providing the first fixed portion on the first auxiliary band, the seat cushion can be easily stored and attached.

[0026] Furthermore, by providing the first cushion and the second cushion with sensors, a system that utilizes sensors can be easily introduced.

[0027] Furthermore, by arranging the sensor at a position where the first line and the second line of the cover member intersect, the position of the sensor can be made easy to find.

[0028] Furthermore, by providing the cover, the first wiring connected to the sensor can be protected.

[0029] Furthermore, since the first fixing portion can be engaged with the first fixed portion with the first band sandwiching the seat portion and the control device between the seat portion and the placement surface, an increase in the number of components can be suppressed.

[0030] Furthermore, since the second cushion has the second band having the second fixing portion and the second fixed portion, the seat cushion can be fixed to the seat more reliably.

[0031] Furthermore, by providing the second fixed portion on the second auxiliary band, the installation work of the seat cushion can be facilitated. [Brief description of the drawings]

[0032] [Figure 1] FIG. 2 is a perspective view showing a seat cushion and a seat according to the embodiment. [Diagram 2] FIG. 2 is a perspective view showing a seat cushion main body. [Diagram 3] FIG. 4 is a perspective view showing the seat cushion and the storage bag in a stored state. [Figure 4] 1 is a perspective view showing a state in which the seat cushion main body is placed on the seat portion and the first bunt and the first auxiliary band are opened. FIG. [Diagram 5] FIG. 13 is a perspective view showing a state in which the second cushion is placed in front of the backrest. [Figure 6] 4 is a partial cross-sectional view seen from the front, showing a state in which a first cushion and a control device are fixed to a seat portion. FIG. [Figure 7] FIG. 4 is a side view showing the state in which the seat cushion is attached to the seat. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Next, an embodiment of the present invention will be described. In this specification, the terms "front, back, left, right, top, bottom" refer to the front, back, left, right, top, bottom as viewed from a person (seater) sitting on the seat cushion when the seat cushion is placed on the seat.

[0034] As shown in FIG. 1, the seat cushion 1 is to be placed on a seat 9 when used, and includes a seat cushion main body 2 and a cover 3. The seat cushion main body 2 includes a first cushion 10, a second cushion 20, a control device 30, a first wiring 41, and a second wiring .

[0035] In this embodiment, the seat 9 is a chair having a seat 91 on which a person sits, a backrest 92, two front legs 93 (left and right), and two rear legs 94 (left and right). The rear legs 94 are made up of an integral member, which includes the rear legs 94 extending downward from the seat 91, and a pillar 95 located above the rear legs 94 and extending vertically to connect the seat 91 and the backrest 92. In this embodiment, the pillar 95 corresponds to the "pillar of the backrest."

[0036] The first cushion 10 is a portion that is placed on the sitting portion 91 of the seat 9. As shown in FIG. 2 , the first cushion 10 has a first cushion main body 11, a first band 12, a first auxiliary band 13, a first fixing portion 14, a first fixed portion 15, and a rear auxiliary band 16.

[0037] The first cushion body 11 is placed on the seat portion 91 when the seat cushion 1 is attached to the seat 9 (see FIG. 7). The first cushion body 11 is configured to include a first pad 17 having cushioning properties and a first skin member 18 serving as a skin member covering the first pad 17.

[0038] The first cushion body 11 has a seating surface 11A and a support surface 11B. When the first cushion body 11 is placed on the seat portion 91, the seating surface 11A faces upward and faces the seated person, and the support surface 11B faces downward and faces the upper surface of the seat portion 91.

[0039] The first band 12 is a sheet-like member extending from the left side of the first cushion body 11. One end of the first band 12 is fixed to the left side of the first cushion body 11, and the other end is provided with a first fixed portion 14. That is, the first band 12 has the first fixed portion 14.

[0040] The first auxiliary band 13 is a sheet-like member extending from the right side of the first cushion body 11. The first auxiliary band 13 has one end fixed to the right side of the first cushion body 11, and a first fixed portion 15 provided at the other end.

[0041] The first band 12 and the first auxiliary band 13 have approximately the same front-to-rear width. The front-to-rear width of the first band 12 and the first auxiliary band 13 is longer than half the front-to-rear width of the first cushion main body 11. In the state shown in FIG. 2 , the left-to-right length of the first band 12 is longer than the left-to-right length of the first auxiliary band 13.

[0042] The first fixed part 14 is a part that is fixed to the right side part of the first cushion body 11 via the first auxiliary band 13. The first fixed part 14 is provided on the other end part of the first band 12 (the left end part in the state shown in FIG. 2). The first fixed part 15 is a part that detachably engages with the first fixing part 14. The first fixed part 15 is provided on the other end part of the first auxiliary band 13 (the right end part in the state shown in FIG. 2).

[0043] The first fixing portion 14 and the first fixed portion 15 constitute a slide fastener. The slide fastener has a pair of elements 14A, 15A and a slider 14B. In this embodiment, one element 14A and slider 14B constitute the first fixing portion 14 and are provided at the other end of the first band 12. The other element 15A constitutes the first fixed portion 15 and is provided at the other end of the first auxiliary band 13.

[0044] The slider 14B is a double-sided slider. The double-sided slider is a slider that can be operated from either the front or back side of the first band 12. The double-sided slider may have, for example, one pull tab on each side of the front and back, or one pull tab that can move between the front and back.

[0045] The rear auxiliary band 16 is a sheet-like member extending from the rear end of the first cushion body 11. One end of the rear auxiliary band 16 is fixed to the rear end of the first cushion body 11, and a hook-and-loop fastener 16A is provided at the other end. In the state shown in FIG. 2, the hook-and-loop fastener 16A is disposed on the lower surface of the rear auxiliary band 16. The hook-and-loop fastener 16A detachably engages with the placement surface 11B of the first cushion body 11 and the first band 12.

[0046] The first cushion 10 further includes a first sensor 51 as a sensor for detecting a seated occupant. The first sensor 51 is disposed inside the first cushion body 11. More specifically, the first sensor 51 is disposed between the upper surface of the first pad 17 and the first cover member 18 (see FIG. 6). The first sensor 51 is, for example, a pressure sensor that obtains a measured value of pressure from the seated occupant.

[0047] The first sensor 51 includes pressure sensors S1, S2, S3, S4, S5, and S6. The pressure sensors S1 to S6 are disposed at positions facing a seated occupant. The pressure sensors S1 to S3 and the pressure sensors S4 to S6 are disposed symmetrically with respect to the left-right center of the first cushion body 11.

[0048] The pressure sensors S1, S2, S4, and S5 are disposed at the rear of the first cushion body 11, specifically at positions corresponding to the buttocks of the seated person. More specifically, the pressure sensors S1 and S4 are disposed near the position below the lowest part of the seated person's ischial bones, where the load from the seated person is greatest. The pressure sensors S2 and S5 are disposed slightly forward of the pressure sensors S1 and S4.

[0049] The pressure sensors S3 and S6 are disposed at positions different from the pressure sensors S1, S2, S4, and S5, specifically, at positions forward and away from the pressure sensors S1, S2, S4, and S5. More specifically, the pressure sensors S3 and S6 are disposed at positions corresponding to the thighs of the seated person. More specifically, the pressure sensors S3 and S6 are disposed near positions under the thighs of the seated person. More specifically, the pressure sensor S3 is disposed near positions under the right thigh of the seated person, and the pressure sensor S6 is disposed near positions under the left thigh of the seated person.

[0050] The first skin member 18 has a first line 18A and a second line 18B. The first line 18A and the second line 18B are made of stitches. The first line 18A extends in the left-right direction. Two first lines 18A are formed side by side in the front-rear direction. The second line 18B extends in a direction intersecting the left-right direction, in this embodiment, in a direction perpendicular to the left-right direction. Specifically, the second line 18B extends in the front-rear direction. Two second lines 18B are formed side by side in the left-right direction.

[0051] Of the first sensors 51, the pressure sensors S1, S2, S4, and S5 are each disposed at a position where the first line 18A and the second line 18B intersect. In more detail, the pressure sensor S1 is disposed at a position where the rear first line 18A and the right second line 18B intersect, and the pressure sensor S2 is disposed at a position where the front first line 18A and the right second line 18B intersect. In addition, the pressure sensor S4 is disposed at a position where the rear first line 18A and the left second line 18B intersect, and the pressure sensor S5 is disposed at a position where the front first line 18A and the left second line 18B intersect.

[0052] The second cushion 20 is a portion that is disposed on the backrest 92 of the seat 9. The second cushion 20 has a second cushion main body 21, a second band 22, a second auxiliary band 23, a second fixing portion 24, and a second fixed portion 25.

[0053] The second cushion body 21 is disposed in front of the backrest 92 when the seat cushion 1 is attached to the seat 9 (see FIG. 7). The second cushion body 21 is configured to include a second pad 27 having cushioning properties and a second skin member 28 serving as a skin member covering the second pad 27.

[0054] The second cushion body 21 has a backrest surface 21A and an opposing surface 21B. When the second cushion body 21 is disposed in front of the backrest 92, the backrest surface 21A faces forward and faces the seated person, and the opposing surface 21B faces backward and faces the front surface of the backrest 92.

[0055] The second band 22 is a sheet-like member extending from the upper end of the second cushion body 21. One end of the second band 22 is fixed to the upper end of the second cushion body 21, and the other end is provided with a second fixing portion 24. That is, the second band 22 has the second fixing portion 24.

[0056] The second auxiliary band 23 is a sheet-like member extending from the lower end of the second cushion body 21. The second auxiliary band 23 has one end fixed to the lower end of the second cushion body 21, and a second fixed portion 25 provided at the other end.

[0057] The second band 22 and the second auxiliary band 23 have approximately the same left and right width. The left and right width of the second band 22 and the second auxiliary band 23 is longer than half the left and right width of the second cushion main body 21. In the state shown in FIG. 2, the front-to-back length of the second band 22 is longer than the top-to-bottom length of the second auxiliary band 23.

[0058] The second fixing portion 24 is a portion that is fixed to the lower end portion of the second cushion body 21 via the second auxiliary band 23. The second fixing portion 24 is provided on the other end portion of the second band 22 (the rear end portion in the state shown in FIG. 2). The second fixed portion 25 is a portion with which the second fixing portion 24 is detachably engaged. The second fixed portion 25 is provided on the other end portion of the second auxiliary band 23 (the lower end portion in the state shown in FIG. 2).

[0059] The second fixing portion 24 and the second fixed portion 25 constitute a slide fastener. The slide fastener has a pair of elements 24A, 25A and a slider 24B. In this embodiment, one element 24A and slider 24B constitute the second fixing portion 24 and are provided at the other end of the second band 22. The other element 25A constitutes the second fixed portion 25 and is provided at the other end of the second auxiliary band 23.

[0060] The second cushion 20 further has a second sensor 52 as a sensor for detecting a seated occupant. The second sensor 52 is disposed inside the second cushion main body 21. More specifically, the second sensor 52 is disposed between the front surface of the second pad 27 and the second cover member 28. As an example, the second sensor 52 is a pressure sensor that obtains a measured value of pressure from the seated occupant.

[0061] The second sensor 52 includes pressure sensors S7, S8, S9, and S10. The pressure sensors S7 to S10 are disposed at positions facing a seated occupant. The pressure sensors S7, S8 and the pressure sensors S9, S10 are disposed symmetrically with respect to the left-right center of the second cushion body 21.

[0062] The pressure sensors S7 and S9 are disposed at positions corresponding to the waist of the seated occupant. More specifically, the pressure sensors S7 and S9 are disposed near positions behind the waist of the seated occupant. The pressure sensors S8 and S10 are disposed at a position above and away from the pressure sensors S7 and S9, specifically, at a position corresponding to the back of the seated occupant. More specifically, the pressure sensors S8 and S10 are disposed near a position behind the back of the seated occupant.

[0063] The second skin member 28 has a first line 28A and a second line 28B. The first line 28A and the second line 28B are made of stitches. The first line 28A extends in the left-right direction. Two first lines 28A are formed side by side, one above the other. The second line 28B extends in a direction intersecting the left-right direction, in this embodiment, in a direction perpendicular to the left-right direction. Specifically, the second line 28B extends in the up-down direction. Two second lines 28B are formed side by side, one above the other.

[0064] The second sensors 52 are disposed at positions where the first line 28A and the second line 28B intersect. In more detail, the pressure sensor S7 is disposed at a position where the lower first line 28A and the right second line 28B intersect, and the pressure sensor S8 is disposed at a position where the upper first line 28A and the right second line 28B intersect. The pressure sensor S9 is disposed at a position where the lower first line 28A and the left second line 28B intersect, and the pressure sensor S10 is disposed at a position where the upper first line 28A and the left second line 28B intersect.

[0065] The control device 30 is a device that acquires measured values ​​from the sensors 51 and 52 and outputs them to an external computer (not shown). The control device 30 has a CPU, ROM, RAM, etc. (not shown). The control device 30 also has a communication unit that enables short-range wireless communication such as Bluetooth (registered trademark) and Wi-Fi (registered trademark). The control device 30 executes a pre-stored program to output the measured values ​​acquired from the sensors 51 and 52 to the external computer via short-range wireless communication.

[0066] The control device 30 is connected to a first sensor 51 of the first cushion 10 and a second sensor 52 of the second cushion 20. In particular, the control device 30 is connected to the first sensor 51 (pressure sensors S1 to S6) via a second wiring 42 so as to be able to acquire measured values ​​from the first sensor 51. The control device 30 is also connected to the second sensor 52 (pressure sensors S7 to S10) via a first wiring 41 so as to be able to acquire measured values ​​from the second sensor 52.

[0067] A power cable 31 extends from the control device 30. The power cable 31 has a connector 32 at its tip to which a plug of a power adapter (not shown) is connected. The control device 30 is also housed in a case 60. The case 60 has cushioning properties to protect the control device 30. The case 60 has a hook-and-loop fastener 61 on its side. The hook-and-loop fastener 61 detachably engages with the first band 12.

[0068] The first wiring 41 is a wiring connected to the second sensor 52 (pressure sensors S7 to S10) of the second cushion 20. The first wiring 41 extends from the second cushion 20, more specifically, from the lower end of the second cushion main body 21, and is connected to the control device 30. The second wiring 42 is a wiring connected to the first sensor 51 (pressure sensors S1 to S6) of the first cushion 10. The second wiring 42 extends from the first cushion 10, more specifically, from the rear end portion of the first cushion main body 11, and is connected to the control device 30.

[0069] 7, the cover 3 is a member that covers the first wiring 41 extending from the second cushion 20 together with the pillar portion 95 of the seat 9 when the second cushion 20 is placed on the backrest 92. As shown in Fig. 3, the cover 3 has a cover main body 3A, a third fixing portion 3B, and a third fixed portion 3C.

[0070] The cover body 3A is a sheet-like member. The cover body 3A can be wrapped around the pillar portion 95 of the sheet 9 to cover the pillar portion 95. The cover body 3A has a cutout portion 3D that receives the seat portion 91 when wrapped around the pillar portion 95.

[0071] The third fixing portion 3B is provided at one end of the cover body 3A, and the third fixed portion 3C is provided at the other end of the cover body 3A. The third fixed portion 3C is provided on the surface of the cover body 3A opposite to the surface on which the third fixing portion 3B is provided. The third fixing portion 3B detachably engages with the third fixed portion 3C. The third fixing portion 3B and the third fixed portion 3C are hook-and-loop fasteners.

[0072] Next, an example of a procedure for putting the seat cushion 1 into a stored state, which is a state for carrying or storing the seat cushion 1, will be described. First, for the second cushion 20, the second band 22 and the second auxiliary band 23 are arranged so as to overlap with the opposing surface 21B of the second cushion main body 21, and the second fixing portion 24 is engaged with the second fixed portion 25. Specifically, the slide fastener formed by the second fixing portion 24 and the second fixed portion 25 is closed.

[0073] Next, the second cushion 20 is placed on the seating surface 11A of the first cushion 10. Then, the first band 12 is placed on the second cushion 20 so as to cover the second cushion 20, and the first fixing portion 14 is engaged with the first fixed portion 15 provided at the end of the first auxiliary band 13. Specifically, the slide fastener formed by the first fixing portion 14 and the first fixed portion 15 is closed. When the seat cushion 1 is in the stored state, the first band 12 is capable of engaging the first fixing portion 14 with the first fixed portion 15 in a state in which the second cushion 20 is sandwiched between the first band 12 and the seating surface 11A.

[0074] The rear auxiliary band 16 (see FIG. 2) of the first cushion 10 is disposed so as to overlap the placement surface 11B of the first cushion main body 11, and the hook-and-loop fastener 16A is engaged with the placement surface 11B.

[0075] The control device 30 is disposed on the first band 12. This allows the seat cushion 1 (seat cushion main body 2) to be in a stored state. The control device 30 may be placed with the surface of the case 60 on which the hook-and-loop fastener 61 is provided facing down, with the hook-and-loop fastener 61 engaged with the first band 12.

[0076] In the stored state, the seat cushion 1 can be carried or stored as is or in a storage bag 4. The storage bag 4 is a bag capable of storing the seat cushion 1 in the stored state of the seat cushion 1. In more detail, the storage bag 4 can store the seat cushion main body 2, the cover 3, a power adapter (not shown) for supplying power to the control device 30, and the like.

[0077] The storage bag 4 has a main storage section 4A and a pocket-like sub-storage section 4B provided on the side of the main storage section 4A. The main storage section 4A is a storage section for mainly storing the seat cushion 1, and can be opened and closed by a slide fastener 4C. The sub-storage section 4B can also be opened and closed by a slide fastener 4D. The storage bag 4 may have a handle, a belt, or the like for carrying it.

[0078] Next, an example of a procedure for attaching the seat cushion 1 to the seat 9 will be described. As shown in FIG. 4, first, the hook-and-loop fastener 16A of the rear auxiliary band 16 is released from the placement surface 11B of the first cushion body 11, and the rear auxiliary band 16 is left hanging down from the first cushion body 11.

[0079] Next, the seat cushion 1 (seat cushion main body 2) is placed on the seat portion 91 so that the placement surface 11B of the first cushion 10 faces the seat portion 91.

[0080] Next, the control device 30 is moved aside, and the engagement between the first fixing portion 14 and the first fixed portion 15 is released. Specifically, the slide fastener formed by the first fixing portion 14 and the first fixed portion 15 is opened. Then, the first band 12 and the first auxiliary band 13 are opened.

[0081] Next, the engagement between the second fixing portion 24 and the second fixed portion 25 of the second cushion 20 is released. Specifically, the slide fastener formed by the second fixing portion 24 and the second fixed portion 25 is opened.

[0082] Next, as shown in Fig. 5, the second cushion 20 is placed in front of the backrest 92 so that the opposing surface 21B of the second cushion main body 21 faces the backrest 92. Next, as shown in Fig. 7, the second band 22 is routed from above the backrest 92 to behind it, and the second auxiliary band 23 is routed from below the backrest 92 to behind it.

[0083] Then, the second fixing portion 24 provided at the end of the second band 22 is engaged with the second fixed portion 25 provided at the end of the second auxiliary band 23. Specifically, the slide fastener formed by the second fixing portion 24 and the second fixed portion 25 is closed. The second band 22 has the backrest 92 sandwiched between it and the opposing surface 21B, and the second fixing portion 24 engages with the second fixed portion 25.

[0084] Next, as shown in Fig. 6, the control device 30 is placed under the seat portion 91. Next, the first band 12 is routed under the seat portion 91 from the left of the seat portion 91, and the first auxiliary band 13 is routed under the seat portion 91 from the right of the seat portion 91, so as to encase the control device 30. At this time, the hook and loop fastener 61 of the case 60 of the control device 30 engages with the first band 12. Note that if the hook and loop fastener 61 is engageable with the underside of the seat portion 91, the hook and loop fastener 61 may be engaged with the underside of the seat portion 91 before the bands 12, 13 are routed around, to temporarily fasten the control device 30 to the seat portion 91.

[0085] After the bands 12 and 13 have been arranged, the first fixing portion 14 provided at the end of the first band 12 is engaged with the first fixed portion 15 provided at the end of the first auxiliary band 13. Specifically, the slide fastener formed by the first fixing portion 14 and the first fixed portion 15 is closed.

[0086] When the seat cushion 1 is placed on the seat portion 91, the first band 12 can engage the first fixing portion 14 with the first fixed portion 15 with the seat portion 91 sandwiched between the first band 12 and the placement surface 11B of the first cushion main body 11. Furthermore, when the seat cushion 1 is placed on the seat portion 91 and the control device 30 is placed below the seat portion 91, the first band 12 can engage the first fixing portion 14 with the first fixed portion 15 with the seat portion 91 and the control device 30 sandwiched between the first band 12 and the placement surface 11B.

[0087] Next, as shown in FIG. 7, the rear auxiliary band 16 of the first cushion 10 is routed from behind and under the seat portion 91, and the hook-and-loop fastener 16A is engaged with the first band 12. In this way, the seat cushion body 2 is attached to the seat 9.

[0088] Thereafter, with the first wiring 41 extending from the second cushion 20 to the control device 30 aligned along the left pillar 95, the cover 3 is wrapped around and covers the first wiring 41 and the pillar 95. More specifically, the cover main body 3A is wrapped around the left pillar 95 together with the first wiring 41, and the third fixing part 3B (see FIG. 3), which is a hook-and-loop fastener, is engaged with the third fixed part 3C, and the cover 3 is attached to the seat 9. The seat cushion 1 can be attached to the seat 9 by the above-mentioned procedure.

[0089] In the above-described procedure, the second cushion 20 is first fixed to the backrest 92 by the second band 22, and then the first cushion 10 and the control device 30 are fixed to the seat portion 91 by the first band 12, but this order may be reversed.

[0090] According to the present embodiment described above, the seat cushion 1 can be put into a compact stored state and can be fixed to the seat portion 91 of the seat 9 by the first band 12 having the first fixing portion 14 and the first fixed portion 15 detachably engaging with the first fixing portion 14. This makes it possible to keep the seat cushion 1 compact when in the stored state while suppressing an increase in the number of components.

[0091] In addition, since the first fixed portion 15 is provided on the first auxiliary band 13, it is easier to engage the first fixing portion 14 with the first fixed portion 15 compared to a case in which the first fixed portion 15 is directly provided on the right side of the first cushion main body 11. This makes it easier to store and attach the seat cushion 1.

[0092] Similarly, since the second fixed portion 25 is provided on the second auxiliary band 23, it is easier to engage the second fixing portion 24 with the second fixed portion 25 compared to a case in which the second fixed portion 25 is provided directly on the lower end portion of the second cushion main body 21. This makes it easier to install the seat cushion 1.

[0093] In addition, since the first cushion 10 and the second cushion 20 have sensors 51, 52 for detecting an occupant, a system utilizing the sensors 51, 52 can be easily introduced by placing the seat cushion 1 on the seat 9, which is an existing chair.

[0094] In addition, since the first sensor 51 (pressure sensors S1, S2, S4, S5) is disposed at a position where the first line 18A and the second line 18B of the first cover member 18 intersect, the position of the first sensor 51 (pressure sensors S1, S2, S4, S5) can be easily found. Similarly, since the second sensor 52 (pressure sensors S7 to S10) is disposed at a position where the first line 28A and the second line 28B of the second cover member 28 intersect, the position of the second sensor 52 can be easily found.

[0095] Furthermore, since the cover 3 is provided to encase and cover the first wiring 41 together with the pillar portion 95 of the sheet 9, the first wiring 41 connected to the second sensor 52 can be protected by the cover 3.

[0096] Furthermore, since the first fixing portion 14 can be engaged with the first fixed portion 15 in a state in which the first band 12 sandwiches the control device 30 together with the seat portion 91 between the first band 12 and the placement surface 11B, the control device 30 can be fixed to the seat portion 91 of the seat 9 by the first band 12. This eliminates the need for a dedicated member for fixing the control device 30 to the seat portion 91, thereby suppressing an increase in the number of components of the seat cushion 1.

[0097] Furthermore, the first cushion 10 can be fixed to the sitting portion 91 of the seat 9, and the second cushion 20 can be fixed to the backrest 92 by the engagement between the second fixing portion 24 of the second band 22 and the second fixed portion 25. This allows the seat cushion 1 to be fixed to the seat 9 more reliably than when only the first cushion 10 is fixed to the seat 9.

[0098] Although one embodiment of the invention has been described above, the present invention is not limited to the above embodiment, and can be modified as appropriate as exemplified below.

[0099] For example, in the above embodiment, the first fixing portion 14 and the first fixed portion 15 constitute a slide fastener, but this is not limited thereto. For example, the first fixing portion and the first fixed portion may constitute a hook-and-loop fastener. In this case, for example, by providing a member constituting a hook-and-loop fastener on both sides of each band, the first fixing portion can be engaged with the first fixed portion in both a stored state of the seat cushion and a state in which the seat cushion is placed on the seat.

[0100] It should be noted that the same applies to the second fixing portion and the second fixed portion, and a hook-and-loop fastener or the like may be used instead of the slide fastener.

[0101] In the above embodiment, the first band 12 and the first auxiliary band 13 are sheet-shaped with a long front-to-rear width, but are not limited thereto. For example, the first band and the first auxiliary band may be belt-shaped with a shorter front-to-rear width than the bands 12 and 13 of the above embodiment, or may be string-shaped with an even shorter front-to-rear width than the belt-shaped bands. The same applies to the second band and the second auxiliary band.

[0102] In the above embodiment, only one first band 12 is provided, but this is not limited thereto. For example, a plurality of belt-like first bands arranged in front and rear may be provided. In this case, for example, the first auxiliary band may be configured to include a plurality of belt-like bands arranged in front and rear corresponding to the first band, or may include only one sheet-like band similar to the first auxiliary band 13 in the above embodiment, and multiple first bands may be engaged with this single first auxiliary band. Conversely, one first band may be configured to engage with multiple first auxiliary bands. The same applies to the second band and the second auxiliary band.

[0103] In addition, in the above embodiment, the first band 12 extends from the left side of the first cushion main body 11, the first auxiliary band 13 extends from the right side of the first cushion main body 11, and the first fixing portion 14 is fixed to the right side of the first cushion main body 11 via the first auxiliary band 13, but this is not limiting. For example, the first band may extend from the right side of the first cushion main body, the first auxiliary band may extend from the left side of the first cushion main body, and the first fixing portion may be fixed to the left side of the first cushion main body via the first auxiliary band.

[0104] In the above embodiment, the first fixed portion 15 is provided on the first auxiliary band 13, but this is not limited thereto. For example, the first fixed portion may be provided directly on the first cushion main body without providing the first auxiliary band. In other words, the first fixed portion may be configured to be directly fixed to the side of the first cushion main body.

[0105] In addition, in the above embodiment, the second band 22 extends from the upper end of the second cushion body 21, the second auxiliary band 23 extends from the lower end of the second cushion body 21, and the second fixing portion 24 is fixed to the lower end of the second cushion body 21 via the second auxiliary band 23, but this is not limited to the above. For example, the second band may extend from the lower end of the second cushion body, the second auxiliary band may extend from the upper end of the second cushion body, and the second fixing portion may be fixed to the upper end of the second cushion body via the second auxiliary band.

[0106] In the above embodiment, the second fixed portion 25 is provided on the second auxiliary band 23, but this is not limited thereto. For example, the second fixed portion may be provided directly on the second cushion main body without providing the second auxiliary band. In other words, the second fixed portion may be configured to be directly fixed to the end portion of the second cushion main body.

[0107] In the above embodiment, only one cover 3 is provided, and when the second cushion 20 is placed on the backrest 92, the cover 3 is attached to wrap and cover the first wiring 41 and the left pillar 95 along which the first wiring 41 is aligned, but this is not limited to the above. For example, a second cover having a similar configuration to the cover 3 may be provided separately from the cover 3, and when the second cushion 20 is placed on the backrest 92, the second cover may be attached to wrap and cover the right pillar 95 along which the first wiring 41 is not aligned. In this way, both the left and right pillars 95 are covered with the cover, improving the appearance of the seat 9 on which the seat cushion 1 is placed and improving the design. The seat cushion may be configured without a cover.

[0108] In the above embodiment, the control device 30 is provided outside the first cushion 10 and the second cushion 20, but this is not limited thereto. For example, the control device may be provided inside at least one of the first cushion and the second cushion. Also, a configuration without a control device is also possible.

[0109] In the above embodiment, only some of the first sensors 51 are disposed at the positions where the first line 18A and the second line 18B of the first skin member 18 intersect, but this is not limited thereto. For example, all of the first sensors may be disposed at the positions where the first line and the second line intersect. In the above embodiment, all of the second sensors 52 are disposed at the positions where the first line 28A and the second line 28B of the second skin member 28 intersect, but this is not limited thereto. For example, only some of the second sensors may be disposed at the positions where the first line and the second line intersect. The sensors may be disposed regardless of the positions of the seams. The skin member may be configured not to have the first line and the second line formed by the seams.

[0110] In addition, in the above embodiment, a pressure sensor is exemplified as a sensor, but the sensor is not limited to this. The sensor may be a sensor other than a pressure sensor for detecting an occupant, such as a capacitance sensor or an optical sensor. The arrangement and number of sensors are arbitrary.

[0111] In the above embodiment, the first cushion 10 and the second cushion 20 each have a sensor, but the present invention is not limited to this, and for example, only one of the first cushion and the second cushion may have a sensor and the other may not have a sensor. Also, neither the first cushion nor the second cushion may have a sensor.

[0112] In the above embodiment, the first cushion 10 and the second cushion 20 are connected via the wiring 41, 42, etc., but the present invention is not limited to this. For example, the first cushion and the second cushion may be connected by a member other than the wiring, for example, a member dedicated to connection. The first cushion and the second cushion may be connected by being integrally formed. The seat cushion may be configured without wiring, etc., and the first cushion and the second cushion may be completely separate.

[0113] In the above embodiment, the second cushion 20 has the second band 22 having the second fixing portion 24 and the second fixed portion 25 with which the second fixing portion 24 is detachably engaged, but the present invention is not limited to this. For example, the second cushion may be an elastic band, one end of which is fixed to the right side of the second cushion body and the other end of which is fixed to the backrest by the band fixed to the left side of the second cushion body. Also, for example, when the first cushion and the second cushion are integrally formed, only the first cushion may be fixed to the seat and the second cushion may not be fixed to the seat.

[0114] Furthermore, the elements described in the above embodiment and modified examples may be implemented in any combination. [Explanation of symbols]

[0115] 1 seat cushion 3 Cover 9 Sheets 10 First Cushion 11A Seating surface 11B Placement surface 12 Band 1 13 First auxiliary band 14 1st fixed part 14B Slider 15 First fixed part 18 First skin member 18A 1st Line 18B 2nd Line 20 Second Cushion 21B Opposite surface 22 Second Band 23 Second Auxiliary Band 24 Second fixed part 25 Second fixed part 28 Second skin member 28A 1st Line 28B 2nd Line 30 Control device 41 1st wiring 51 First Sensor 52 Second Sensor 91 Seat area 92 Backrest 95 Column section S1~S10 Pressure Sensors

Claims

1. A seat cushion for use in a seat having a seat portion and a backrest, A first cushion disposed on the seat portion, the first cushion having a seating surface facing a seated person and a support surface facing the seat portion; A second cushion disposed on the backrest, The first cushion is a first band extending from one of a right side and a left side of the first cushion and having a first fixing portion fixed to the other of the right side and the left side; a first fixed portion that is detachably engaged with the first fixing portion, The first band is capable of engaging the first fixed portion with the first fixed portion when the second cushion is sandwiched between the first band and the seating surface when the seat cushion is in a stored state, and is also capable of engaging the first fixed portion with the seating surface when the seat cushion is placed on the seat.

2. The first cushion further includes a first auxiliary band extending from the other of the right side portion and the left side portion, The seat cushion according to claim 1 , wherein the first fixed portion is provided on the first auxiliary band.

3. 3. The seat cushion according to claim 1, wherein the first cushion and the second cushion each have a sensor for detecting the seated occupant.

4. 4. The seat cushion according to claim 3, wherein the sensor is a pressure sensor.

5. The first cushion and the second cushion each have a cover member, Each of the cover members has a first line consisting of a seam extending in the left-right direction and a second line consisting of a seam extending in a direction intersecting the left-right direction, 5. The seat cushion according to claim 3, wherein the sensor is disposed at a position where the first line and the second line intersect.

6. a first wiring connected to a sensor of the second cushion and extending from the second cushion; a cover that encases and covers the first wiring and the pillar in a state in which the first wiring is aligned with a pillar of the backrest when the second cushion is placed on the backrest; The seat cushion according to any one of claims 3 to 5, further comprising:

7. a controller connected to the first cushion sensor and the second cushion sensor; The seat cushion according to any one of claims 3 to 6, characterized in that when the seat cushion is placed on the seat and the control device is placed under the seat, the first band is capable of engaging the first fixing portion with the first fixed portion when the seat and the control device are sandwiched between the first band and the placement surface.

8. The second cushion is a second band extending from the upper end portion and having a second fastening portion fastened to a lower end portion of the second cushion; a second fixed portion with which the second fixing portion is detachably engaged; An opposing surface facing the backrest, The seat cushion according to any one of claims 1 to 7, wherein the second band engages with the second fixed portion in a state in which the backrest is sandwiched between the second band and the opposing surface.

9. The second cushion further includes a second auxiliary band extending from a lower end thereof, The seat cushion according to claim 8, wherein the second fixed portion is provided on the second auxiliary band.

10. 10. The seat cushion according to claim 1, wherein the first fixing portion and the first fixed portion form a slide fastener, and the slide fastener has a double-sided slider.

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