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 and used on a seat having a seat portion and a backrest.

Background Art

[0002] Conventionally, as a seat cushion, there is known one including a first cushion disposed on the seat portion of a seat such as a chair and a second cushion disposed on the backrest of the seat (Patent Document 1). In this technology, one end of a plurality of fixing belts is sewn at opposing positions on the left and right side surfaces of the second cushion, and can be fixed by winding around the back surface of the backrest with a hook-and-loop fastener attached to the other end portion of the fixing belt.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, it is desired that the seat cushion can be made compact and maintained in that state when removed from the seat and carried or stored. On the other hand, providing a fastener or the like to maintain a compact state has a problem that the number of components increases.

[0005] Therefore, an object of the present invention is to provide a seat cushion that can maintain a compact state while suppressing an increase in the number of components. Another object is to facilitate the storage work and attachment work of the seat cushion. Another object is to simply introduce a system using a sensor. Another object is to make the position of the sensor easy to understand. Also, it is an object to protect the wiring connected to the sensor. Also, it is an object to securely fix the seat cushion to the seat.

Means for Solving the Problems

[0006] The seat cushion for achieving the above object is a seat cushion that is disposed and used on a seat having a seat portion and a backrest, and is a first cushion disposed on the seat portion, and has a seating surface facing the seated person and a placement surface facing the seat portion. A first cushion, and a second cushion disposed on the backrest, wherein the first cushion is a first band extending from one of the right side portion and the left side portion of the first cushion, and has a first fixing portion fixed to the other of the right side portion and the left side portion. A first band, and a first fixed portion that detachably engages with the first fixing portion, wherein the first band can engage the first fixing portion with the first fixed portion in a state where the second cushion is sandwiched between the first band and the seating surface in a stored state of the seat cushion, and the seat cushion is disposed on the seat portion. In the state where the seat portion is sandwiched between the placement surface, the first fixing portion can be engaged with the first fixed portion.

[0007] According to such a configuration, the seat cushion can be made into a compact storage state by the first band having the first fixing portion and the first fixed portion that detachably engages with the first fixing portion, and the seat cushion can be fixed to the seat portion of the seat. Thereby, while suppressing an increase in the number of components, a compact state can be maintained.

[0008] In the above-described 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, it becomes easier to engage the first fixing part with the first fixed part, so that the storage work and the attachment work of the seat cushion can be facilitated.

[0010] In the seat cushion described above, the first cushion and the second cushion can each be configured to have a sensor for detecting the seated person.

[0011] According to this, by arranging a seat cushion on an existing chair or the like, a system using a sensor can be easily introduced.

[0012] In the seat cushion described above, the sensor can be configured as a pressure sensor.

[0013] In the seat cushion described above, the first cushion and the second cushion have skin members, and each of the skin members has a first line composed of seams extending in the left - right direction and a second line composed of seams extending in a direction intersecting the left - right direction. The sensor can be arranged at a position where the first line and the second line intersect.

[0014] According to this, the position of the sensor can be made easy to understand.

[0015] The seat cushion described above further includes a first wiring connected to the sensor of the second cushion, a first wiring extending from the second cushion, and when the second cushion is arranged on the backrest, a cover that wraps and covers the first wiring and the column of the backrest in a state where the first wiring is along the column.

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

[0017] The above-described seat cushion further includes a control device connected to the sensor of the first cushion and the sensor of the second cushion. In a state where the seat cushion is disposed on the seat portion and the control device is disposed under the seat portion, the first band can be configured to engage the first fixing portion with the first fixed portion while sandwiching the seat portion and the control device between the first band and the placement surface.

[0018] According to this, the control device can be fixed to the seat portion of the seat by the first band. Thereby, an increase in the number of components can be suppressed.

[0019] In the above-described seat cushion, the second cushion is a second band extending from an upper end portion, and includes a second band having a second fixing portion fixed to a lower end portion of the second cushion, a second fixed portion to which the second fixing portion is detachably engaged, and an opposing surface facing the backrest. The second band can be configured to engage the second fixed portion while sandwiching the backrest between the opposing surface and the second band.

[0020] According to this, the second cushion can be fixed to the backrest of the seat. Thereby, the seat cushion can 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 portion, and the second fixed portion may be provided on the second auxiliary band.

[0022] According to this, since it becomes easier to engage the second fixing portion with the second fixed portion, the attachment work of the seat cushion can be facilitated.

[0023] In the above-described seat cushion, the first fixing portion and the first fixed portion may constitute a slide fastener, and the slide fastener may have a two-sided slider.

Advantages of the Invention

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

[0025] In addition, by providing the first fixed portion on the first auxiliary band, it is possible to facilitate the storage operation and the attachment operation of the seat cushion.

[0026] In addition, since the first cushion and the second cushion have sensors, it is possible to easily introduce a system using the sensors.

[0027] In addition, by arranging the sensor at a position where the first line and the second line of the skin member intersect, the position of the sensor can be made clear.

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

[0029] In addition, since the first band can engage the first fixed portion with the first fixed portion while sandwiching the seat portion and the control device between the mounting surfaces, an increase in components can be suppressed.

[0030] In addition, since the second cushion has a second band having a second fixed portion and a second fixed portion, the seat cushion can be securely fixed to the seat.

[0031] In addition, by providing the second fixed portion on the second auxiliary band, the attachment operation of the seat cushion can be facilitated.

Brief Description of the Drawings

[0032]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0033] Next, an embodiment of the invention will be described. In this specification, front and rear, left and right, and up and down are based on the front and rear, left and right, and up and down as seen by a person sitting on the seat cushion placed on the seat (the seated person).

[0034] As shown in FIG. 1, the seat cushion 1 is arranged and used on the seat 9, and includes a seat cushion body 2 and a cover 3. The seat cushion body 2 includes a first cushion 10, a second cushion 20, a control device 30, a first wiring 41, and a second wiring 42.

[0035] Here, in the present embodiment, the seat 9 is a chair having a seat portion 91 on which a person sits, a backrest 92, two left and right front legs 93, and two left and right rear legs 94. The member constituting the rear leg 94 integrally has a rear leg 94 extending downward from the seat portion 91 and a column portion 95 located above the rear leg 94 and extending vertically so as to connect the seat portion 91 and the backrest 92. In the present embodiment, the column portion 95 corresponds to the "column of the backrest".

[0036] The first cushion 10 is a portion arranged on the seat portion 91 of the seat 9. As shown in FIG. 2, the first cushion 10 has a first cushion 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 disposed on the seat portion 91 in a state where the seat cushion 1 is attached to the seat 9 (see FIG. 7). The first cushion body 11 includes a first pad 17 having cushioning properties and a first skin member 18 as a skin member that covers the first pad 17.

[0038] The first cushion body 11 has a seating surface 11A and a mounting surface 11B. In a state where the first cushion body 11 is disposed on the seat portion 91, the seating surface 11A faces upward and faces the seated person, and the mounting 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 portion of the first cushion body 11. One end portion of the first band 12 is fixed to the left side portion of the first cushion body 11, and a first fixing portion 14 is provided at the other end portion. That is, the first band 12 has the first fixing portion 14.

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

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

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

[0043] The first fixing part 14 and the first fixed part 15 constitute a slide fastener. The slide fastener has a pair of elements 14A, 15A and a slider 14B. In the present embodiment, one element 14A and the slider 14B constitute the first fixing part 14 and are provided at the other end of the first band 12. Further, the other element 15A constitutes the first fixed part 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 surface of the first band 12. The double-sided slider may have, for example, one pull tab on each of the front and back sides, 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 mounting surface 11B of the first cushion body 11 or the first band 12.

[0046] The first cushion 10 further has a first sensor 51 as a sensor for detecting a seated person. The first sensor 51 is disposed inside the first cushion body 11. Specifically, the first sensor 51 is disposed between the upper surface of the first pad 17 and the first skin member 18 (see FIG. 6). The first sensor 51 is, as an example, a pressure sensor that acquires a measured value of pressure from a seated person.

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

[0048] The pressure sensors S1, S2, S4, and S5 are arranged at the rear part 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 arranged near positions below the lowest part of the ischium of the seated person where the load from the seated person is the greatest. Also, the pressure sensors S2 and S5 are arranged at positions slightly in front of the pressure sensors S1 and S4.

[0049] The pressure sensors S3 and S6 are arranged at positions different from those of the pressure sensors S1, S2, S4, and S5, specifically, at positions away from the pressure sensors S1, S2, S4, and S5 in the front direction. More specifically, the pressure sensors S3 and S6 are arranged at positions corresponding to the thighs of the seated person. More specifically, the pressure sensors S3 and S6 are arranged near positions below the thighs of the seated person. Even more specifically, the pressure sensor S3 is arranged near a position below the right thigh of the seated person, and the pressure sensor S6 is arranged near a position below 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 formed by seams. 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] Among the first sensors 51, the pressure sensors S1, S2, S4, and S5 are respectively arranged at the positions where the first line 18A and the second line 18B intersect. Specifically, the pressure sensor S1 is arranged at the position where the rear first line 18A and the right second line 18B intersect, and the pressure sensor S2 is arranged at the position where the front first line 18A and the right second line 18B intersect. Also, the pressure sensor S4 is arranged at the position where the rear first line 18A and the left second line 18B intersect, and the pressure sensor S5 is arranged at the position where the front first line 18A and the left second line 18B intersect.

[0052] The second cushion 20 is a portion arranged on the backrest 92 of the seat 9. The second cushion 20 has a second cushion 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 arranged in front of the backrest 92 in a state where the seat cushion 1 is attached to the seat 9 (see FIG. 7). The second cushion body 21 is configured to have a second pad 27 having cushioning properties and a second skin member 28 as a skin member covering the second pad 27.

[0054] The second cushion body 21 has a backrest contact surface 21A and an opposing surface 21B. In a state where the second cushion body 21 is arranged in front of the backrest 92, the backrest contact 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 portion of the second cushion body 21. One end portion of the second band 22 is fixed to the upper end portion of the second cushion body 21, and a second fixing portion 24 is provided at the other end portion. 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. One end of the second auxiliary band 23 is fixed to the lower end of the second cushion body 21, and a second fixed portion 25 is provided at the other end.

[0057] The second band 22 and the second auxiliary band 23 have substantially the same left and right widths. The left and right widths of the second band 22 and the second auxiliary band 23 are longer than half the length of the left and right widths of the second cushion body 21. In the state shown in FIG. 2, the front-rear length of the second band 22 is longer than the up-down length of the second auxiliary band 23.

[0058] The second fixing portion 24 is a portion fixed to the lower end of the second cushion body 21 via the second auxiliary band 23. The second fixing portion 24 is provided at the other end of the second band 22 (the rear end in the state shown in FIG. 2). The second fixed portion 25 is a portion to which the second fixing portion 24 is detachably engaged. The second fixed portion 25 is provided at the other end of the second auxiliary band 23 (the lower end 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 the present embodiment, one element 24A and the 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 includes a second sensor 52 as a sensor for detecting a seated person. The second sensor 52 is disposed inside the second cushion body 21. Specifically, the second sensor 52 is disposed between the front surface of the second pad 27 and the second skin member 28. The second sensor 52 is, for example, a pressure sensor that acquires a measured value of pressure from a seated person.

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

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

[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 formed by seams. The first line 28A extends in the left - right direction. Two first lines 28A are formed side by side vertically. 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 left and right.

[0064] The second sensor 52 is respectively arranged at the positions where the first line 28A and the second line 28B intersect. Specifically, the pressure sensor S7 is arranged at the position where the lower first line 28A and the right second line 28B intersect, and the pressure sensor S8 is arranged at the position where the upper first line 28A and the right second line 28B intersect. Also, the pressure sensor S9 is arranged at the position where the lower first line 28A and the left second line 28B intersect, and the pressure sensor S10 is arranged at the position where the upper first line 28A and the left second line 28B intersect.

[0065] The control device 30 is a device that acquires measurement values from 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). Further, the control device 30 has a communication unit that enables short-range wireless communication such as Bluetooth (registered trademark) and Wi-Fi (registered trademark). The control device 30 outputs the measurement values acquired from sensors 51 and 52 to an external computer by short-range wireless communication by executing a program stored in advance.

[0066] The control device 30 is connected to the first sensor 51 of the first cushion 10 and the second sensor 52 of the second cushion 20. Specifically, the control device 30 is connected to the first sensor 51 (pressure sensors S1 to S6) via the second wiring 42 so as to be able to acquire measurement values from the first sensor 51. Further, the control device 30 is connected to the second sensor 52 (pressure sensors S7 to S10) via the first wiring 41 so as to be able to acquire measurement 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 to which a plug of a power adapter (not shown) is connected at the tip. Further, the control device 30 is housed in a case 60. The case 60 has cushioning properties in order to protect the control device 30. The case 60 has a hook-and-loop fastener 61 on the side surface. The hook-and-loop fastener 61 is detachably engaged 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, specifically, from the lower end portion of the second cushion 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, specifically, from the rear end portion of the first cushion body 11, and is connected to the control device 30.

[0069] As shown in FIG. 7, the cover 3 is a member that covers the first wiring 41 extending from the second cushion 20 together with the column portion 95 of the seat 9 when the second cushion 20 is disposed on the backrest 92. As shown in FIG. 3, the cover 3 has a cover 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 cover the column portion 95 by being wound around the column portion 95 of the seat 9. The cover body 3A has a notch 3D for receiving the seat portion 91 when wound around the column 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 disposed on the surface of the cover body 3A opposite to the surface on which the third fixing portion 3B is disposed. The third fixing portion 3B is detachably engaged with the third fixed portion 3C. The third fixing portion 3B and the third fixed portion 3C are surface fasteners.

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

[0073] Next, place the second cushion 20 on the seating surface 11A of the first cushion 10. Then, place the first band 12 on the second cushion 20 so as to cover the second cushion 20, and engage the first fixing portion 14 with the first fixed portion 15 provided at the end of the first auxiliary band 13. Specifically, close the slide fastener constituted by the first fixing portion 14 and the first fixed portion 15. The first band 12 can engage the first fixing portion 14 with the first fixed portion 15 while sandwiching the second cushion 20 between the seating surface 11A in the stored state of the seat cushion 1.

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

[0075] The control device 30 is placed on the first band 12. Thereby, the seat cushion 1 (seat cushion body 2) can be put into the stored state. The control device 30 may engage the hook-and-loop fastener 61 with the first band 12 with the surface provided with the hook-and-loop fastener 61 of the case 60 facing down.

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

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

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

[0079] Next, the seat cushion 1 (seat cushion body 2) is placed on the seat portion 91 such 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 constituted 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 constituted 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 such that the opposing surface 21B of the second cushion body 21 faces the backrest 92. Next, as shown in FIG. 7, the second band 22 is looped from above the backrest 92 to behind the backrest 92, and the second auxiliary band 23 is looped from below the backrest 92 to behind the backrest 92.

[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 constituted by the second fixing portion 24 and the second fixed portion 25 is closed. The second band 22 engages the second fixed portion 25 with the backrest 92 sandwiched between the opposing surface 21B.

[0084] Next, as shown in FIG. 6, place the control device 30 under the seat portion 91. Next, wrap the first band 12 from the left side of the seat portion 91 under the seat portion 91, and wrap the first auxiliary band 13 from the right side of the seat portion 91 under the seat portion 91. At this time, the surface fastener 61 of the case 60 of the control device 30 engages with the first band 12. When the surface fastener 61 can engage with the lower surface of the seat portion 91, the control device 30 may be temporarily fixed to the seat portion 91 by engaging the surface fastener 61 with the lower surface of the seat portion 91 before winding the bands 12 and 13.

[0085] After winding the bands 12 and 13, engage the first fixing portion 14 provided at the end of the first band 12 with the first fixed portion 15 provided at the end of the first auxiliary band 13. Specifically, close the slide fastener constituted by the first fixing portion 14 and the first fixed portion 15.

[0086] The first band 12 can engage the first fixing portion 14 with the first fixed portion 15 in a state where the seat portion 91 is sandwiched between the first cushion body 11 and the mounting surface 11B with the seat cushion 1 disposed on the seat portion 91. Further, the first band 12 can engage the first fixing portion 14 with the first fixed portion 15 in a state where the seat cushion 1 is disposed on the seat portion 91 and the control device 30 is disposed under the seat portion 91, with the seat portion 91 and the control device 30 sandwiched between the mounting surface 11B.

[0087] Next, as shown in FIG. 7, wind the rear auxiliary band 16 of the first cushion 10 from behind the seat portion 91 under the seat portion 91, and engage the surface fastener 16A with the first band 12. Thereby, the seat cushion body 2 is attached to the seat 9.

[0088] After that, with the first wiring 41 extending from the second cushion 20 to the control device 30 along the left pillar portion 95, the cover 3 wraps and covers the first wiring 41 and the pillar portion 95. Specifically, the cover main body 3A is wound around the left pillar portion 95 together with the first wiring 41, and the third fixing portion 3B (see FIG. 3), which is a hook-and-loop fastener, is engaged with the third fixed portion 3C to attach the cover 3 to the seat 9. By the above procedure, the seat cushion 1 can be attached to the seat 9.

[0089] In the above-described procedure, first, the second cushion 20 is 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. However, this order may be reversed.

[0090] According to the present embodiment described above, the seat cushion 1 can be put into a compact storage state by the first band 12 having the first fixing portion 14 and the first fixed portion 15 that detachably engages with the first fixing portion 14, and the seat cushion 1 can be fixed to the seat portion 91 of the seat 9. Thereby, regarding the seat cushion 1, while suppressing an increase in the number of components, a compact state can be maintained in the storage state.

[0091] Further, 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 as compared with the case where the first fixed portion 15 is directly provided on the right side portion of the first cushion main body 11. Thereby, the storage operation and the attachment operation of the seat cushion 1 can be facilitated.

[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 as compared with the case where the second fixed portion 25 is directly provided at the lower end portion of the second cushion main body 21. Thereby, the attachment operation of the seat cushion 1 can be facilitated.

[0093] In addition, since the first cushion 10 and the second cushion 20 are provided with sensors 51 and 52 for detecting a seated person, by arranging the seat cushion 1 on the existing chair seat 9, a system using the sensors 51 and 52 can be easily introduced.

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

[0095] In addition, since the cover 3 that wraps and covers the first wiring 41 together with the column portion 95 of the seat 9 is provided, the first wiring 41 connected to the second sensor 52 can be protected by the cover 3.

[0096] In addition, since the first band 12 can engage the first fixing portion 14 with the first fixed portion 15 in a state where the control device 30 is sandwiched between the seat portion 91 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. As a result, a dedicated member for fixing the control device 30 to the seat portion 91 is not required, so an increase in the components of the seat cushion 1 can be suppressed.

[0097] In addition, the first cushion 10 can be fixed to the seat portion 91 of the seat 9, and the second cushion 20 can be fixed to the backrest 92 by the engagement of the second fixing portion 24 of the second band 22 and the second fixed portion 25. As a result, compared with the case where only the first cushion 10 is fixed to the seat 9, the seat cushion 1 can be more reliably 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 implemented with appropriate modifications 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 it 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 members constituting the hook-and-loop fastener on both surfaces of each band, the first fixing portion can be engaged with the first fixed portion both in the storage state of the seat cushion and in the state where the seat cushion is disposed on the seat.

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

[0101] Also, in the above embodiment, the first band 12 and the first auxiliary band 13 are in the form of a sheet having a long front-to-back width, but it is not limited thereto. For example, the first band or the first auxiliary band may be in the form of a belt having a shorter front-to-back width than the bands 12 and 13 in the above embodiment, or may be in the form of a string having a front-to-back width shorter than that of the belt. The same applies to the second band and the second auxiliary band.

[0102] Also, in the above embodiment, only one first band 12 is provided, but it is not limited thereto. For example, a plurality of belt-shaped first bands arranged in the front-to-back direction may be provided. In this case, for example, the first auxiliary band may be configured to include a plurality of belt-shaped members arranged in the front-to-back direction corresponding to the first band, or may include only one sheet-shaped member similar to the first auxiliary band 13 in the above embodiment, and a plurality of first bands may be engaged with this one first auxiliary band. Conversely, a configuration in which one first band is engaged with a plurality of first auxiliary bands may also be possible. The same applies to the second band and the second auxiliary band.

[0103] In the above-described embodiment, the first band 12 extends from the left side portion of the first cushion body 11, the first auxiliary band 13 extends from the right side portion of the first cushion body 11, and the first fixing portion 14 is fixed to the right side portion of the first cushion body 11 via the first auxiliary band 13. However, the present invention is not limited to this. For example, the first band may extend from the right side portion of the first cushion body, the first auxiliary band may extend from the left side portion of the first cushion body, and the first fixing portion may be fixed to the left side portion of the first cushion body via the first auxiliary band.

[0104] In the above-described embodiment, the first fixed portion 15 is provided on the first auxiliary band 13. However, the present invention is not limited to this. For example, without providing the first auxiliary band, the first fixed portion may be directly provided on the first cushion body. That is, the first fixing portion may be configured to be directly fixed to the side portion of the first cushion body.

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

[0106] In the above-described embodiment, the second fixed portion 25 is provided on the second auxiliary band 23. However, the present invention is not limited to this. For example, without providing the second auxiliary band, the second fixed portion may be directly provided on the second cushion body. That is, the second fixing portion may be configured to be directly fixed to the end portion of the second cushion body.

[0107] In the above-described embodiment, when only one cover 3 is provided and the second cushion 20 is disposed on the backrest 92, the cover 3 is attached so as to wrap and cover the first wiring 41 and the left column portion 95 along the first wiring 41. However, the present invention is not limited to this. For example, a second cover having the same configuration as the cover 3 may be further provided separately from the cover 3, and when the second cushion 20 is disposed on the backrest 92, the second cover may be attached so as to wrap and cover the right column portion 95 that does not run along the first wiring 41. According to this, since both the left and right column portions 95 are covered with covers, the appearance of the seat 9 on which the seat cushion 1 is disposed is improved, and the designability can be enhanced. Further, the seat cushion may be configured without a cover.

[0108] In the above-described embodiment, the control device 30 is provided outside the first cushion 10 and the second cushion 20. However, the present invention is not limited to this. For example, the control device may be provided inside at least one of the first cushion and the second cushion. Further, the configuration may be such that the control device is not provided.

[0109] In the above-described embodiment, only a part of the first sensors 51 is disposed at the position where the first line 18A and the second line 18B of the first skin member 18 intersect. However, the present invention is not limited to this. For example, all of the first sensors may be disposed at the position where the first line and the second line intersect. In the above-described embodiment, all of the second sensors 52 are disposed at the position where the first line 28A and the second line 28B of the second skin member 28 intersect. However, the present invention is not limited to this. For example, only a part of the second sensors may be disposed at the position where the first line and the second line intersect. Further, the sensors may be disposed regardless of the position of the seam. Further, the skin member may be configured without the first line and the second line formed by the seam.

[0110] In the above embodiment, a pressure sensor is exemplified as the sensor, but the present invention is not limited thereto. The sensor may be a sensor for detecting a seated person other than a pressure sensor, for example, a capacitance sensor, an optical sensor, or the like. Further, the arrangement and number of sensors are arbitrary.

[0111] In the above embodiment, the first cushion 10 and the second cushion 20 each include a sensor, but the present invention is not limited thereto. For example, only one of the first cushion and the second cushion may include a sensor, and the other may not include a sensor. Further, both the first cushion and the second cushion may not include a sensor.

[0112] In the above embodiment, the first cushion 10 and the second cushion 20 are connected via wirings 41, 42, etc., but the present invention is not limited thereto. For example, the first cushion and the second cushion may be connected by a member other than a wiring, for example, a dedicated connecting member. Further, the first cushion and the second cushion may be connected by being integrally formed. Further, the seat cushion may not include a wiring or the like, and the first cushion and the second cushion may be completely separated.

[0113] In the above embodiment, the second cushion 20 has a second band 22 having a second fixing portion 24 and a second fixed portion 25 to which the second fixing portion 24 is detachably engaged, but the present invention is not limited thereto. For example, the second cushion may be an elastic band, and one end is fixed to the right side portion of the second cushion body, and the other end is fixed to the left side portion of the second cushion body, and the backrest may be fixed by the band. Further, 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] Further, the elements described in the above embodiments and modified examples may be arbitrarily combined and implemented.

Description of Reference Numerals

[0115] 1 Sheet cushion 3 Covers 9 Sheets 10 First cushion 11A Seating surface 11B Placing surface 12 First band 13 First auxiliary band 14 First fixing part 14B Slider 15 First fixed part 18 First skin member 18A First line 18B Second line 20 Second cushion 21B Opposite surface 22 Second band 23 Second auxiliary band 24 Second fixing part 25 Second fixed part 28 Second skin member 28A First line 28B Second line 30 Control device 41 First wiring 51 First sensor 52 Second sensor 91 Seat part 92 Backrest 95 Column part S1~S10 Pressure sensors

Claims

[Claim 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.

Images