Seat cushion

Abstract

To provide a seat cushion that allows a user to obtain a comfortable heating environment when seated. [Solution] The seat cushion 1 comprises a seating cushion section 2 on which the user U places his / her buttocks and thighs when seated, a leg resting sheet section 10 connected to the seating cushion section 2 and on which the user U places his / her legs below the knees when seated, a thigh heater 20 provided on the seating cushion section 2 and positioned at the back of the user U's thighs, and a calf heater 21 provided on the leg resting sheet section 10 and positioned at the position of the user U's calves.

Description

[Technical field]

[0001] The present invention relates to a seat cushion that is placed on the seat surface of a seat. [Background technology]

[0002] 2. Description of the Related Art Seat cushions that promote warmth of the lower body when seated in a chair are known.

[0003] The seat cushion in Patent Document 1 has a seat cushion portion on which a user sits, and this seat cushion portion has a heat storage foam built in. When the user sits on this seat cushion, heat from the user is stored in the heat storage foam, thereby increasing the warmth of the user's lower body.

[0004] The seat cushion of Patent Document 2 has a seat cushion part on which a user sits, and this seat cushion part has a seat heating element built in as a heating means. The seat heating element generates heat when electricity is applied from a power source. According to this seat cushion, the seat heating element generates heat, and the heat warms the user's buttocks. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-119761 A [Patent Document 2] JP 2004-261415 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the seat cushion in Patent Document 1 only stores heat from the user, and therefore has a problem in that it cannot provide a comfortable heated environment for a user whose lower body is cold, for example.

[0007] The seat cushion of Patent Document 2 can reliably warm the user's buttocks. However, when the user is seated, the thighs and calves are the parts of the lower body that tend to get cold or feel cold easily. Therefore, there is a problem that a comfortable heating environment cannot be provided for the user when seated.

[0008] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a seat cushion that allows a user to enjoy a comfortable heated environment while seated. [Means for solving the problem]

[0009] The present invention has been made in consideration of the above problems, and is characterized by comprising a seating cushion portion on which the user's buttocks and thighs are placed when seated, a leg rest sheet portion connected to the seating cushion portion and on which the user's legs below the knees are placed when seated, a thigh heater provided on the seating cushion portion and positioned at the back of the user's thighs, and a calf heater provided on the leg rest sheet portion and positioned at the position of the user's calves. Effect of the Invention

[0010] According to the present invention, the user's thighs are warmed by the heat of the buttocks heater, and the user's calves are warmed by the heat of the calf heater, so that the thighs and calves, which tend to get cold or are easily sensitive to cold when the user is seated, are reliably warmed, providing the user with a comfortable heated environment. [Brief description of the drawings]

[0011] The drawings show specific embodiments of the invention according to the present disclosure, including essential features of the invention as well as alternative and preferred embodiments. [Figure 1] FIG. 2 is a perspective view of a seat cushion according to the embodiment. [Diagram 2] FIG. 2 is a plan view of the seat cushion according to the embodiment. [Diagram 3] FIG. 2 is a side view of the seat cushion according to the embodiment. [Figure 4] 4 shows the present embodiment, in which (a) is a cross-sectional view of the leg rest seat portion in an unloaded state with no legs placed thereon (cross-sectional view taken along line IVa-IVa in FIG. 3), (b) is a perspective view of the state in which the user's legs are placed on the leg rest seat portion, and (c) is a cross-sectional view of the leg rest seat portion in the state of (b). [Diagram 5] FIG. 1 is a perspective view showing the present embodiment, illustrating a state in which a seat cushion is placed on a seat and a user is sitting on the seat cushion. [Figure 6] 1A is an oblique view of the operation unit according to this embodiment, (b) is a schematic diagram showing the operation modes that change each time the push switch is pressed, and (c) is an oblique view showing the state in which a mobile battery is placed in the small item storage section. [Figure 7] FIG. 13 is a perspective view showing the embodiment, illustrating a state in which the standing wall portion surrounds the waist of the user. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Each embodiment will be described in detail below with reference to the accompanying drawings. In this embodiment, the description of already known technologies will be omitted. In addition, the following is an example of an apparatus and method for embodying the technical idea of ​​the invention, and the technical idea of ​​the invention is not limited to the following. The technical idea of ​​the invention can be modified in various ways within the scope of the matters described in the utility model registration claims. In particular, it should be noted that the drawings are schematic and may differ from the actual product.

[0013] One embodiment of the present invention is shown in Figures 1 to 7. As shown in Figures 1 to 3, a seat cushion 1 includes a seat cushion part 2, a leg rest seat part 10 connected to the front end of the seat cushion part 2, a thigh heater 20 provided on the seat cushion part 2, and a calf heater 21 provided on the leg rest seat part 10.

[0014] The seat cushion 1 is used with the seat cushion portion 2 placed on the seat surface of a chair 30 or the like and the leg rest sheet portion 10 protruding forward from the seat surface of the chair 30 or the like (see FIG. 5).

[0015] The sitting cushion 2 has a seat 3 having a rectangular front side and an arcuate rear side in a plan view, and a substantially arcuate standing wall 4 that is integral with the seat 3 and stands above the entire periphery of the seat 3 except for the front end side. The seat 3 and the standing wall 4 are integral with each other on the outer surface side and are made of, for example, cloth. A cushioning material is arranged without gaps in the internal space of the seat 3 and the standing wall 4. The seat 3 maintains the shape of the sitting cushion 2 by the cushioning material. The seat 3 sinks into the cushioning material due to the weight of the seated user U, allowing the user U to sit comfortably.

[0016] 5, when the user U is seated, his / her buttocks and thighs are placed on the seat 3, and the standing wall 4 surrounds the user U's waist when the user U is seated. One ends of a pair of strings 7 are fixed to the left and right positions on the rear bottom surface of the seat 3. A small item storage compartment 8 is provided on the outer surfaces of the standing wall 4 and the seat 3.

[0017] The leg rest sheet portion 10 extends obliquely downward and forward from the front end surface of the seat surface portion 3, and when the user U is seated, the legs below the left and right knees are placed on it (see FIG. 5). In this embodiment, the inclination angle a (shown in FIG. 3) of the leg rest sheet portion 10 with respect to the seat surface portion 3 is set to 135 degrees. In other words, it is an angle of inclination of 45 degrees downward from the horizontal. The front and back sides of the leg rest sheet portion 10 are made of, for example, cloth.

[0018] Inside the seat surface 3 and leg rest seat 10 of the sitting cushion 2, high-strength reinforcing members 11 are arranged along the direction perpendicular to the width direction (extension direction of the leg rest seat 10) at three positions, i.e., the central position in the width direction and both ends in the width direction. One end of each reinforcing member 11 is inserted into the central position in the front-rear direction of the seat surface 3 of the sitting cushion 2, and the other end reaches the tip of the leg rest seat 10. The three reinforcing members 11 have the strength to maintain the shape of the leg rest seat 10 extending obliquely downward from the front end surface of the seat surface 3 toward the front when the legs below the knees of the user U are not placed on them. Each reinforcing member 11 is accommodated in a state of being fixed at a position on the front surface side of the seat surface 3 and the front and back sides of the leg rest seat 10. In this embodiment, the reinforcing members 11 are formed of polycarbonate resin material. Polycarbonate resin material is a thermoplastic resin material and has excellent impact resistance and durability.

[0019] That is, the leg rest sheet section 10 is configured to have a strong shape retention at the positions where the reinforcing members 11 are arranged, and is flexibly deformable at the positions between the reinforcing members 11 (between the center and each end portion). The positions where the reinforcing members 11 are arranged are positions where the legs below the knees of the seated user U cannot be placed, and the positions between the reinforcing members 11 are positions where the legs below the knees of the seated user U can be placed.

[0020] A pair of thigh heaters 20 are provided inside the seating portion 3, and are positioned at the backs of the left and right thighs when the user U is seated. The thigh heaters 20 are flexible and deform in response to the deformation of the seating portion 3. A pair of calf heaters 21 are provided inside the leg-resting sheet portion 10, and are positioned at the positions of the left and right calves when the user U is seated. The positions of the left and right calves when the user U is seated are between the three reinforcing members 11. The calf heaters 21 are flexible and deform in response to the deformation of the leg-resting sheet portion 10.

[0021] The thigh heater 20 and the calf heater 21 are each made up of a heating element that generates heat when electricity is applied. The heating element is, for example, a surface heating element.

[0022] The power supply to the heating elements of thigh heater 20 and calf heater 21 is controlled by operation unit 25. Operation unit 25 is configured to enable on / off control and adjustment of the heating temperature. That is, operation unit 25 has a single push switch 26 and three temperature light-up display units 27, as shown in Fig. 6(a).

[0023] 6(b), the temperature can be switched from the OFF state to the ON state by pressing the push switch 26, and the temperature is switched in sequence among three levels, high temperature, medium temperature, and low temperature, each time the push switch 26 is pressed. The operation unit 25 is configured to automatically switch to the OFF state after a predetermined time has elapsed (one hour in this embodiment) when the ON state is selected.

[0024] The thigh heater 20, calf heater 21, etc. are configured to receive power from a mobile battery 28 or the like via a USB terminal (not shown). The mobile battery 28 can be stored in the small item storage section 8 of the standing wall section 4, for example, as shown in FIG. 6(c).

[0025] Next, the use (function) of the seat cushion 1 will be described. As shown in Fig. 5, a user U places the sitting cushion portion 2 of the seat cushion 1 on the seat surface of a chair 30 or the like at home, at work, etc. Then, the user U sits with his / her buttocks and thighs on the seat surface portion 3 of the seat cushion 1 and his / her legs below the knees on the leg rest seat portion 10. Then, the left and right thighs of the user U are positioned above the respective thigh heaters 20, and the left and right calves of the user U are positioned above the respective calf heaters 21.

[0026] The user U presses the push switch 26 of the operation unit 25 to turn it on and set it to a desired temperature. The thigh heater 20 and the calf heater 21 are heated, and the thighs and calves of the user U are warmed by the heat of the thigh heater 20 and the calf heater 21.

[0027] 4(b) and (c), the leg rest sheet 10 places the legs of the user U below the knees between the reinforcing members 11, and the legs sink due to their own weight at the positions between the reinforcing members 11, but since the legs of the user U do not rest at the positions of the reinforcing members 11 and the weight of the legs does not act directly on the legs, the legs only sink shallowly or hardly at all. Therefore, the leg rest sheet 10 deforms into a shape that fits the back side of each leg and warms the back side of each leg while wrapping it.

[0028] As described above, the seat cushion 1 comprises a seating cushion portion 2 on which the user U places his / her buttocks and thighs when seated, a leg rest sheet portion 10 connected to the seating cushion portion 2 and on which the user U places his / her legs below the knees when seated, a thigh heater 20 provided on the seating cushion portion 2 and positioned at the back of the user U's thighs, and a calf heater 21 provided on the leg rest sheet portion 10 and positioned at the position of the user U's calves.

[0029] Therefore, as described above, the thighs and calves of the user U are warmed by the heat of the thigh heater 20 and the calves by the heat of the calf heater 21, so that the thighs and calves, which tend to get cold or feel cold easily, are reliably warmed when the user U is seated, and the user U can obtain a comfortable heated environment. In other words, when sitting in a seat on a train, the thighs are warmed by the heating heat from the seat and the calves are warmed by the heating air blowing out from under the seat, providing a comfortable heated state, and the same heated environment can be obtained.

[0030] In this embodiment, the thigh heater 20 and the calf heater 21 are configured to warm only the thighs and calves, which tend to get cold or feel cold easily, when the user U is seated, but it may be configured to warm the entire back surface of the lower body including the thighs and calves. However, this embodiment has the advantage of being more effective in heating and also saving energy.

[0031] High-strength reinforcing members 11 are arranged perpendicular to the width direction at three locations: the widthwise central position of the seat surface portion 3 and the leg rest seat portion 10 of the sitting cushion portion 2, and both ends of the width direction. The positions where each reinforcing member 11 is arranged have strong shape retention, while the positions between each reinforcing member 11 are configured to be flexibly deformable.

[0032] Therefore, for the reasons mentioned above, the leg rest sheet portion 10 deforms into a shape that conforms to the underside of each leg below the knee, wrapping around and warming the underside of each leg (see Figures 4(b) and (c)), thereby reliably warming the entire calf and providing a comfortable heating state.

[0033] The thigh heater 20 and the calf heater 21 are made up of a heating element that generates heat when electricity is applied, and therefore there is no need to replace the heating element as in a pocket warmer or the like.

[0034] An operation unit 25 that controls the flow of electricity to the heating element has a single push switch 26, and is configured such that by pressing the push switch 26, the state can be switched from off to on and the temperature setting can also be varied, and when switched on, it is configured to turn off after a predetermined time has elapsed.

[0035] Therefore, operation unit 25 has only one push switch 26, which does not require complicated operations for user U and provides good operability. In addition, because operation unit 25 automatically switches from on to off without the need to operate it, thigh heater 20 and calf heater 21 can be prevented from being left on, providing excellent safety.

[0036] The sitting cushion portion 2 has a vertical wall portion 4 that surrounds the waist of the user U when the user U is seated. Therefore, as shown in Fig. 7, the vertical wall portion 4 covers the waist of the user U, which not only provides a comfortable sitting experience but also improves heat retention.

[0037] A pair of strings 7 are provided on the left and right sides of the back side of the seat cushion 2. Therefore, as shown in Fig. 7, if the pair of strings 7 are wrapped around the support rod 31 of the back of a chair and the ends of the strings are tied together, the seat cushion 1 will not shift out of position, so that the seat cushion 2 is easy to use and will not shift out of position even if the user U repeatedly stands up and sits on it.

[0038] In this embodiment, the inclination angle a (shown in FIG. 3) of the leg rest seat portion 10 with respect to the seat surface portion 3 is set to 135 degrees, but it may be set to an angle other than 135 degrees.

[0039] In this embodiment, the thigh heater 20 and the calf heater 21 are arranged as a pair on the left and right sides, but they may be arranged as one integrated unit. The thigh heater 20 and the calf heater 21 may also be arranged as one integrated unit.

[0040] As a modification of this embodiment, the thigh heater may be configured to heat both the thighs and the buttocks.

[0041] In this embodiment, the reinforcing member 11 is made of polycarbonate resin material, but it may be made of other materials.

[0042] Although each embodiment has been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the claims of the utility model registration.

[0043] In addition, the present invention may include at least the following embodiments, which may be adopted separately or in combination with each other. (1) A seat cushion characterized in that high-strength reinforcing members are arranged to extend perpendicular to the width direction at three locations: the center position in the width direction of the seat surface portion of the sitting cushion portion and the leg-rest seat portion, and both ends in the width direction, and the leg-rest seat portion is configured to have high shape retention at the locations where each reinforcing member is arranged, and to be flexibly deformable at the locations between each reinforcing member. (2) A seat cushion characterized in that the thigh heater and the calf heater are composed of heating elements that generate heat when electricity is applied, and the heating temperature is configured to be adjustable in multiple stages. (3) A seat cushion characterized in that an operating unit that controls the flow of electricity to the heating element has a single push switch, and is configured such that by pressing the push switch, the state can be switched from an off state to an on state and the temperature setting can be varied, and that when the on state is selected, the state automatically switches to the off state after a predetermined time has elapsed. (4) The seat cushion is characterized in that the seat cushion portion has an upright wall portion that surrounds the waist of a user U when the user U is seated. (5) A seat cushion characterized in that the sitting cushion portion is provided with a pair of strings on the left and right sides of the back side. [Explanation of symbols]

[0044] 1 seat cushion 2. Seat cushion 3 Seat part 4 Vertical wall 10 Leg rest seat 11 Reinforcement members 20 Thigh heater 21 Calf Heater 25 Control section 26 Push Switch U User

Claims

1. A seat cushion comprising: a seating cushion portion on which a user places his / her buttocks and thighs when seated; a leg rest sheet portion connected to the seating cushion portion and on which the user places his / her legs below the knees when seated; a thigh heater provided on the seating cushion portion and positioned at the back of the user's thighs; and a calf heater provided on the leg rest sheet portion and positioned at the position of the user's calves.

2. Reinforcing members are arranged to extend in a direction perpendicular to the width direction at three locations, i.e., at a central position in the width direction of the seat surface portion of the sitting cushion portion and the leg rest seat portion and at both ends in the width direction; 2. The seat cushion according to claim 1, wherein the leg rest seat portion is configured to have high shape retention at the positions where the reinforcing members are arranged, and to be flexibly deformable at the positions between the reinforcing members.

3. 2. The seat cushion according to claim 1, wherein the thigh heater and the calf heater are constituted by heating elements that generate heat when electricity is applied, and the heating temperature is adjustable in a plurality of stages.

4. The seat cushion according to claim 3, characterized in that the operating unit that controls the flow of electricity to the heating element has a single push switch, and is configured such that by pressing the push switch, the state can be switched from an off state to an on state and the temperature setting can also be changed, and that when the on state is selected, the state automatically becomes off after a predetermined time has elapsed.

5. The seat cushion according to claim 1 , wherein the seat cushion portion has an upright wall portion that surrounds the waist of a user when the user is seated.

6. 2. The seat cushion according to claim 1, wherein the seat cushion portion is provided with a pair of strings at the left and right positions on the back side.

Images