Chair cushion and chair seat comprising same

Abstract

According to the seat cushion for the chair, a plurality of buffer grooves which deform according to the seat load of a user are formed in the center part of the lower surface, the plurality of buffer grooves comprise a plurality of main buffer grooves and a plurality of auxiliary buffer grooves, the plurality of main buffer grooves are respectively arranged in a plurality of rows in the front-back direction and the left-right direction and are mutually spaced at equal intervals, and the auxiliary buffer grooves are arranged in a plurality of rows in the front-back direction and the left-right direction. And a plurality of sub-cushion grooves respectively connected to the plurality of main cushion grooves and formed in a linear shape having a narrower and shallower width and depth than the plurality of main cushion grooves, thereby having an advantage of improving seat comfort with a simple structure.

Description

Technical Field

[0001] The present invention relates to a chair cushion and a chair seat including the same, and more particularly to a chair cushion having a plurality of buffer grooves formed in the center of the lower portion thereof which deform according to the user's sitting load, thereby improving the comfort of the seat with a simple structure. Background Art

[0002] Generally, the sponge used for the seat has no other structure to improve the seat comfort, and the seat comfort is generated only by material characteristics and shape. In the case of a sponge with uniform thickness used for the seat, when the user sits on the seat, the central part of the sponge is relatively protruding due to the human body structure, which may cause the user to feel uncomfortable.

[0003] In order to solve this problem, when the center portion of the sponge is formed into a concave shape, the outer shape of the seat is easily deformed and the thickness is reduced, so there is a problem that the cushioning force is reduced.

[0004] In addition, the cushioning force of the seat can also be adjusted by adjusting the physical properties of the sponge, but there are limits on adjusting the optimal physical properties of the sponge to obtain the optimal cushioning force of the seat.

[0005] Korean Patent Gazette No. 10-2073647 (February 5, 2020; hereinafter referred to as “the prior art”) discloses a “seat cushion for a chair” that is fastened to the upper part of a seat frame for a chair and allows for comfortable sitting.

[0006] The prior art is composed of memory foam, an elastic body, and a retaining spring. The memory foam constitutes an outer cushion. The elastic body is inserted into a receiving portion formed at the bottom of the memory foam, and is an elastic material softer than the memory foam. A plurality of fastening holes are arranged on both sides to constitute an inner cushion. The brake spring is fastened to the fastening hole of the elastic body. When the center is taken as the starting point, the outer spring is formed to be relatively larger and longer, so that the two sides of the cushion are higher than the center, thereby supporting the thighs of the user to prevent the legs from being separated when the user sits down, thereby improving the seat comfort of the user.

[0007] However, in the prior art, the structure for improving the comfort of the seat is composed of the memory foam, the elastic body and the retaining spring, so the structure is complicated, and there is a problem of increasing assembly time and cost. Summary of the invention

[0008] (Problem to be solved)

[0009] The technical problem of the present invention is to provide a seat cushion for a chair and a seat for a chair including the same, wherein a plurality of buffer grooves are formed in the center of the lower portion to deform according to the user's sitting load, thereby improving the seat comfort with a simple structure.

[0010] The technical problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art in the technical field to which the present invention belongs from the following description.

[0011] (Methods of solving the problem)

[0012] In order to achieve the above-mentioned problem, a plurality of buffer grooves are formed at the center of the lower side of the seat cushion of the chair according to the present invention, which are deformed according to the seat load of the user. The plurality of buffer grooves are composed of a plurality of main buffer grooves and a plurality of auxiliary buffer grooves. The plurality of main buffer grooves are arranged in a plurality of rows in the front-to-back direction and the left-to-right direction and are spaced at the same interval from each other. The plurality of auxiliary buffer grooves are connected to the plurality of main buffer grooves, respectively. The plurality of auxiliary buffer grooves are formed into a straight line shape with a narrower width and a shallower depth than the plurality of main buffer grooves.

[0013] A vertical thickness from upper ends of the plurality of main buffer grooves to an upper end of the seat cushion may be formed in the range of 30 to 40 mm.

[0014] The main buffer grooves may be formed to have depths greater than half of a top-bottom thickness of the seat cushion.

[0015] The plurality of main buffer grooves and the plurality of auxiliary buffer grooves may be bilaterally symmetrical with respect to the left-right center of the seat cushion. The plurality of auxiliary buffer grooves may be arranged in an oblique line, and the closer to the left-right center of the seat cushion the further forward the grooves are.

[0016] The plurality of main buffer grooves may be composed of a plurality of first main buffer grooves, a plurality of second main buffer grooves and a plurality of third main buffer grooves. The plurality of first main buffer grooves may be arranged at intervals from each other in the front-to-back direction at the left-right center of the seat cushion. The plurality of second main buffer grooves may be spaced to the left from the plurality of first main buffer grooves, and the plurality of second main buffer grooves may be spaced from each other in the front-to-back direction. The plurality of third main buffer grooves may be spaced to the right from the plurality of first main buffer grooves. The plurality of third main buffer grooves may be spaced from each other in the front-to-back direction. The plurality of auxiliary buffer grooves may be composed of a plurality of first auxiliary buffer grooves and a plurality of second auxiliary buffer grooves. The plurality of first auxiliary buffer grooves may be connected to the plurality of first main buffer grooves and the plurality of second main buffer grooves, respectively. The plurality of second auxiliary buffer grooves may be connected to the plurality of first main buffer grooves and the plurality of third main buffer grooves, respectively.

[0017] The plurality of first secondary buffer slots may be arranged in an oblique line. The front ends of the plurality of first secondary buffer slots may be respectively connected to the plurality of first main buffer slots. The rear ends of the plurality of first secondary buffer slots may be respectively connected to the plurality of second main buffer slots, and the plurality of second main buffer slots are arranged in a row immediately after the plurality of first main buffer slots connected to the front ends of the plurality of first secondary buffer slots. The plurality of second secondary buffer slots may be arranged in an oblique line. The front ends of the plurality of second secondary buffer slots may be respectively connected to the plurality of first main buffer slots. The rear ends of the plurality of second secondary buffer slots may be respectively connected to the plurality of third main buffer slots, and the plurality of third main buffer slots are arranged in a row immediately after the plurality of first main buffer slots connected to the front ends of the plurality of second secondary buffer slots.

[0018] The plurality of main buffer slots may further comprise a plurality of fourth main buffer slots and a plurality of fourth main buffer slots. The plurality of fourth main buffer slots may be spaced to the left from the plurality of second main buffer slots, and the plurality of fourth main buffer slots may be spaced apart from each other in the front-to-back direction. The plurality of fifth main buffer slots may be spaced to the right from the plurality of third main buffer slots. The plurality of fifth main buffer slots may be spaced apart from each other in the front-to-back direction. The plurality of secondary buffer slots may further comprise a plurality of third secondary buffer slots and a plurality of fourth secondary buffer slots. The plurality of third secondary buffer slots may be connected to the plurality of second main buffer slots and the plurality of fourth main buffer slots, respectively. The plurality of fourth secondary buffer slots may be connected to the plurality of third main buffer slots and the plurality of fifth main buffer slots, respectively.

[0019] The plurality of third secondary buffer slots may be arranged in an oblique line. The front ends of the plurality of third secondary buffer slots may be connected to the plurality of second main buffer slots, respectively. The rear ends of the plurality of third secondary buffer slots may be connected to the plurality of fourth main buffer slots, respectively. The plurality of fourth main buffer slots are arranged in a row immediately after the plurality of second main buffer slots connected to the front ends of the plurality of third secondary buffer slots. The plurality of fourth secondary buffer slots may be arranged in an oblique line. The front ends of the plurality of fourth secondary buffer slots may be connected to the plurality of third main buffer slots, respectively. The rear ends of the plurality of fourth secondary buffer slots may be connected to the plurality of fifth main buffer slots, respectively. The plurality of fifth main buffer slots are arranged in a row immediately after the plurality of third main buffer slots connected to the front ends of the plurality of fourth secondary buffer slots.

[0020] The number of each of the plurality of fourth main buffer slots and the plurality of fifth main buffer slots may be one less than the number of each of the plurality of first main buffer slots, the plurality of second main buffer slots, and the plurality of third main buffer slots. The frontmost main buffer slot of each of the plurality of fourth main buffer slots and the plurality of fifth main buffer slots may be arranged to be spaced in the left-right direction from the second main buffer slot arranged in front of each of the plurality of first main buffer slots, the plurality of second main buffer slots, and the plurality of third main buffer slots.

[0021] The plurality of main buffer grooves may be formed as circular grooves.

[0022] The plurality of main buffer grooves may be formed as polygonal grooves.

[0023] An insertion groove may be formed below the seat cushion, a seat plate supporting the seat cushion may be inserted into the insertion groove, and the plurality of buffer grooves may be formed above the insertion groove.

[0024] A frame groove may be formed on the upper frame of the insertion groove. A frame protrusion formed on the upper frame of the seat plate may be inserted into the frame groove. The plurality of buffer grooves may be formed on the inner side of the frame groove in the upper surface of the insertion groove.

[0025] In order to achieve the above-mentioned problem, the chair seat according to the present invention is composed of a seat cushion and a seat plate. A plurality of buffer grooves that deform according to the user's sitting load are formed in the lower center of the seat cushion. The seat plate supports the seat cushion. The plurality of buffer grooves are composed of a plurality of main buffer grooves and a plurality of auxiliary buffer grooves. The plurality of main buffer grooves can be arranged in a plurality of rows in the front-to-back direction and the left-to-right direction and are spaced at the same interval from each other. The plurality of auxiliary buffer grooves are respectively connected to the plurality of main buffer grooves, and the plurality of auxiliary buffer grooves are formed into a straight line shape that is narrower and shallower in width and depth than the plurality of main buffer grooves.

[0026] An insertion groove may be formed below the seat cushion, the seat plate may be inserted into the insertion groove, and the plurality of buffer grooves may be formed above the insertion groove.

[0027] Specific items of other embodiments are included in the detailed description and drawings.

[0028] (Effects of the Invention)

[0029] The seat cushion for a chair according to the present invention is a seat having a plurality of buffer grooves formed in the center portion below, which are deformed according to the user's sitting load. The plurality of buffer grooves include a plurality of main buffer grooves and a plurality of auxiliary buffer grooves. The plurality of auxiliary buffer grooves are formed to be narrower and shallower in width and depth than the plurality of main buffer grooves. Therefore, when the user is sitting on the seat of the chair, the plurality of main buffer grooves and the plurality of auxiliary buffer grooves are deformed due to the user's weight. At the same time, when the inner walls of the plurality of main buffer grooves and the inner walls of the plurality of auxiliary buffer grooves are tilted, the overall shape of the seat cushion is not excessively damaged, thereby improving the comfort of the seat. Through the upper and lower depth difference of the plurality of main buffer grooves and the plurality of auxiliary buffer grooves, the user will not feel collapse in the portion of the seat that directly contacts the body, thereby having the effect of improving the comfort of the entire area of ​​the seat.

[0030] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a perspective view showing a chair equipped with a seat cushion for a chair according to an embodiment of the present invention;

[0032] Figure 2 yes Figure 1 The back stereogram of

[0033] Figure 3 It is shown Figure 1 and Figure 2 An exploded perspective view of a chair seat;

[0034] Figure 4 is a perspective view showing a seat cushion for a chair according to an embodiment of the present invention;

[0035] Figure 5 yes Figure 4 Bottom stereogram of

[0036] Figure 6 yes Figure 4 Bottom view of ;

[0037] Figure 7 yes Figure 6 The cross-sectional view of line AA;

[0038] Figure 8 It is shown Figure 5 A cross-sectional view of the upper and lower thickness of the seat cushion and the depth of multiple main buffer grooves;

[0039] Fig. 9 yes Figure 6 BB line sectional view, which is a diagram of the deformation of the seat cushion for a chair according to an embodiment of the present invention when a user's sitting load acts on the seat.

[0040] (Explanation of Reference Numerals)

[0041] 1: Chair 11: First main buffer slot

[0042] 12: Second main buffer slot 13: Third main buffer slot

[0043] 14: Fourth main buffer slot 15: Fifth main buffer slot

[0044] 21: First auxiliary buffer tank 22: Second auxiliary buffer tank

[0045] 23: The third auxiliary buffer tank 24: The fourth auxiliary buffer tank

[0046] 30: Insert slot 35: Frame slot

[0047] 111: Seat cushion 112: Seat board

[0048] 112A: Border protrusion DETAILED DESCRIPTION

[0049] Hereinafter, a seat cushion for a chair and a seat for a chair including the same according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, terms related to the directions of up, down, front, back, left, and right are based on the Figure 1 and Figures 4 to 6 The up, down, front, back, left and right directions are shown.

[0050] Figure 1 is a perspective view showing a chair equipped with a seat cushion for a chair according to an embodiment of the present invention; Figure 2 yes Figure 1 The back stereogram of Figure 3 It is shown Figure 1 and Figure 2 Exploded perspective view of a chair seat.

[0051] Reference Figures 1 to 3 The chair 1 equipped with the seat cushion 111 for a chair according to the embodiment of the present invention may include: a chair body 100 , an adjustment device 200 , chair legs 300 , a back column 400 and armrests 510 , 520 .

[0052] The chair body 100 may include a seat 110, a backrest 120, and a headrest 130. The seat 110, the backrest 120, and the headrest 130 may be substantially formed in a quadrilateral shape.

[0053] The seat 110 can extend forward and backward. The seat 110 can be a part for the user to sit on. The seat 110 can support the user's buttocks and the thighs of the user's legs.

[0054] The rear portion of the upper surface of the seat 110 that supports the user's buttocks may be slightly recessed downward, and the front portion that supports the user's thighs may be inclined toward the lower side as it moves forward.

[0055] The backrest 120 extends up and down and may extend so that the lower end is located further forward than the upper end. The lower end of the backrest 120 may be hinged to the back column 400. Here, the hinge may include a horizontal axis extending left and right. The backrest 120 may be formed as a separate structure separated from the seat 110.

[0056] The headrest 130 may extend up and down. The headrest 130 may be combined in front of the upper end of the backrest 120. The headrest 130 may also be formed integrally with the backrest 120, or the lower end of the headrest 130 may be rotatably combined in front of the upper end of the backrest 120 with a horizontal axis extending left and right as the rotation center.

[0057] The seat 110 may include a seat cushion 111 and a seat plate 112. The seat cushion 111 may be disposed on the upper side of the seat plate 112. The seat cushion 111 is formed of a material having a cushioning force and can provide a cushioning feeling for the user, while the seat plate 112 is formed of a harder material than the seat cushion 111 and can support the seat cushion 111.

[0058] The seat 110 may further include a fiber cover (not shown). The fiber cover covers the seat cushion 111 and the seat plate 112 on the upper side of the seat cushion 111, the center of the fiber cover may cover the upper side of the seat cushion 111, and the edge of the fiber cover may cover the lower edge of the seat plate 112.

[0059] The backrest 120 may be a portion that supports the back of the user. The backrest 120 may include a backrest pad 121 and a backrest frame 122. The backrest pad 121 may be disposed in front of the backrest frame 122. The backrest pad 121 is formed of a material having a cushioning force and may provide a cushioning feeling to the user, and the backrest frame 122 is formed of a material that is harder than the backrest pad 121 and may support the backrest pad 121.

[0060] The backrest frame 122 may include a backrest plate 123 and a lumbar support 124 .

[0061] The backrest board 123 can support the back and waist load of the user. A backrest connector 700 made of soft material can be arranged behind the backrest board 123. The backrest connector 700 can connect the backrest board 123 of the backrest frame 122 with a backrest slide (not shown), which is slidably coupled to the front of the upper end of the back column 400. The backrest connector 700 is formed of a soft material that can be deformed according to the load of the user, and can move the backrest frame 122 in the direction of the load of the user.

[0062] When a user sits on the chair 1, the lower end of the backrest board 123 and the waist of the user may face each other. The lumbar support 124 is combined behind the lower end of the backrest board 123 to support the waist load of the user.

[0063] The headrest 130 may be a portion that supports the head of the user. The headrest 130 may include a headrest cushion 131 and a headrest board 132. The headrest cushion 131 may be disposed in front of the headrest board 132. The headrest cushion 131 is formed of a material having a cushioning force and may provide a cushioning feeling to the user, and the headrest board 132 is formed of a material harder than the headrest cushion 131 and may support the headrest cushion 131.

[0064] The seat cushion 111, the backrest cushion 121 and the headrest cushion 131 may be formed of the same material, and the seat plate 112, the backrest frame 122 and the headrest plate 132 may be formed of the same material. For example, the seat cushion 111, the backrest cushion 121 and the headrest cushion 131 may be formed of sponge, and the seat plate 112, the backrest frame 122 and the headrest plate 132 may be formed of plastic harder than the sponge.

[0065] The sponge can be a polyurethane foam sponge. Specifically, the sponge can be formed by stirring a main raw material, a foaming agent, a dispersant, a catalyst and water and then foaming and molding. Here, the main raw material can use at least one of TDI (toluene diisocyanate) and MDI (diphenylmethane diisocyanate). Then, the foaming agent can be used for organic foaming agents such as nitroalkanes, aldoximes, active ethylene compounds, hydrated compounds, cyclic compound tertiary alcohols, tetracyclic carbonyl compounds, etc. and inorganic foaming agents such as CCl2F, CCl3F, boric acid, aluminum hydroxide, etc. Then, the catalyst can use Dabco, tin octoate, dibutylpyrrolidone and tertiary amine.

[0066] The seat cushion 111 is not necessarily formed of sponge, but can also be formed of a soft material similar to the sponge. That is, the seat cushion 111 can be formed of a soft material that can be deformed according to the user's sitting load. For example, the seat cushion 111 can also be formed of latex or memory foam.

[0067] The seat plate 112 and the headrest plate 132 are formed to be slightly flexible and can be slightly deformed according to the load of the user sitting on the chair 1 .

[0068] In particular, the backrest board 123 is formed of an elastic body and is elastically deformed according to the load of the user acting on the backrest 120 , thereby improving the comfort of the user sitting on the chair 1 .

[0069] The adjusting device 200 may be disposed on the lower side of the seat 110. The adjusting device 200 may be combined with the lower side of the seat plate 112 of the seat 110. The adjusting device 200 may adjust the height of the chair body 100 and the front-rear angle of the back column 400 at the same time.

[0070] The adjustment device 200 may include two levers 210 and 220 operated by the user. Of the two levers 210 and 220, the first lever 210 is configured to protrude on the right side of the adjustment device 200 and may be a lever for adjusting the height of the chair body 100 through the operation of the user, and the second lever 220 is configured to protrude on the left side of the adjustment device 200 and may be a lever for adjusting the front-rear angle of the back column 400 through the operation of the user.

[0071] A cylinder device 350 may be provided at the center of the chair leg portion 300 for adjusting the height of the chair body 100. The cylinder device 350 may be arranged vertically. The cylinder device 350 may include a cylinder and a piston rod. The cylinder is inserted into a hole formed in the center of the chair leg portion 300 through which the cylinder is vertically penetrated, and then may be coupled to the center of the chair leg portion 300, and the piston rod may move up and down and may be rotatably coupled to the cylinder in a horizontal direction. The upper end of the piston rod may be coupled to the adjustment device 200. If the user pulls the first lever 210 upward while sitting on the seat 110 of the chair body 100, the piston rod may be guided out of the cylinder through the hole formed at the upper end of the cylinder and may move upward, thereby allowing the user to adjust the height of the chair body 100.

[0072] The leg portion 300 may be disposed at the lower side of the adjustment device 200. The leg portion 300 may support the adjustment device 200. The leg portion 300 may include a plurality of leg bodies 310 disposed radially. In the present embodiment, the plurality of leg bodies 310 are formed in five numbers, but it is sufficient to form three or more. A wheel 320 is rotatably coupled to the end of each of the plurality of leg bodies 310.

[0073] The back column 400 can support the backrest 120. The upper part of the back column 400 can be extended up and down, and the lower part of the back column 400 can be bent forward from the lower end of the upper part of the back column 400 and can be extended forward. The upper end of the back column 400 can be arranged at a position lower than the upper end of the backrest 120. The upper end of the back column 400 can be arranged at a position lower than the upper end of the backrest board 123. The left and right width of the back column 400 can be smaller than the left and right width of the backrest 120. The left and right width of the back column 400 can be smaller than the left and right width of the backrest board 123. The upper part of the back column 400 can be arranged to face the left and right center of the backrest 120 in the rear of the backrest 120. The upper part of the back column 400 can be arranged to face the left and right center of the backrest board 123 in the rear of the backrest board 123.

[0074] The armrests 510 and 520 may support the left and right arms of the user. The armrests 510 and 520 may include a left armrest 510 supporting the left arm of the user and a right armrest 520 supporting the right arm of the user. The left armrest 510 and the right armrest 520 may form the same structure.

[0075] The left handrail portion 510 may include a left handrail post 511 and a left handrail 512 .

[0076] The upper portion of the left handrail column 511 may extend vertically, and the lower portion of the left handrail column 511 may be bent to the right from the upper lower end of the left handrail column 511 and may extend to the right. The lower end of the left handrail column 511 may be coupled to the left side of the lower end portion of the back column 400 .

[0077] The left handrail 512 may be a part that actually supports the left arm of the user. The left side gasket as the uppermost structure of the left handrail 512 may contact the left arm of the user. The left handrail 512 may be combined with a left side rod at the lower side of the left side gasket. The left side rod is inserted into the inside of the left handrail column 511 through a hole formed at the upper end of the left handrail column 511, and is guided out or inserted into the left handrail column 511 through the operation of the user, so that the height can be adjusted. The left side gasket may also be configured to be adjusted in front and rear positions with respect to the left handrail.

[0078] The upper portion of the right handrail column 521 may extend vertically, and the lower portion of the right handrail column 521 may be bent to the left from the upper lower end of the right handrail column 521 and may extend to the left. The lower end of the right handrail column 521 may be coupled to the right side of the lower end portion of the back column 400.

[0079] The right handrail 522 may be a part that actually supports the right arm of the user. The right gasket as the uppermost structure of the right handrail 522 may contact the right arm of the user. The right handrail 522 may be combined with a right rod at the lower side of the right gasket. The right rod is inserted into the inside of the right handrail column 521 through a hole formed at the upper end of the right handrail column 521, and can be guided out or inserted into the right handrail column 521 through the operation of the user, so that the height can be adjusted. In addition, the right gasket may also be configured to be adjusted in front and rear positions with respect to the right rod.

[0080] Figure 4 is a perspective view showing a seat cushion for a chair according to an embodiment of the present invention; Figure 5 yes Figure 4 Bottom stereogram of Figure 6 yes Figure 4 Bottom view of ; Figure 7 yes Figure 6 Cross-section diagram along line AA.

[0081] Reference Figures 3 to 7 A plurality of buffer grooves 11, 12, 13, 14, 15, 21, 22, 23, 24 that are deformed according to the user's sitting load may be formed at the center of the lower side of the seat cushion 111. The plurality of buffer grooves 11, 12, 13, 14, 15, 21, 22, 23, 24 may include a plurality of main buffer grooves 11, 12, 13, 14, 15 and a plurality of auxiliary buffer grooves 21, 22, 23, 24.

[0082] The plurality of main buffer grooves 11, 12, 13, 14, 15 are arranged in a plurality of rows in the front-rear direction and the left-right direction and can be spaced at the same intervals from each other. In this embodiment, the plurality of main buffer grooves 11, 12, 13, 14, 15 can be formed as circular grooves.

[0083] The plurality of sub-buffer grooves 21, 22, 23, 24 may be connected to the plurality of main buffer grooves 11, 12, 13, 14, 15, respectively. The plurality of sub-buffer grooves 21, 22, 23, 24 may be formed in a linear shape having a narrower width and a shallower depth than the plurality of main buffer grooves 11, 12, 13, 14, 15. The plurality of sub-buffer grooves 21, 22, 23, 24 may be arranged in an oblique line.

[0084] The plurality of main buffer grooves 11 , 12 , 13 , 14 , 15 are formed as circular grooves, and the plurality of auxiliary buffer grooves 21 , 22 , 23 , 24 are formed as linear grooves arranged in an oblique line so as to press the center portion of the upper surface of the seat cushion 111 while maintaining the outer shape of the seat cushion 111 .

[0085] However, the plurality of main buffer grooves 11, 12, 13, 14, 15 do not necessarily need to be formed as circular grooves. That is, at least the width and depth are wider and deeper than the plurality of sub-buffer grooves 21, 22, 23, 24. The plurality of main buffer grooves 11, 12, 13, 14, 15 may also be formed as polygonal grooves, such as triangular grooves, quadrilateral grooves, pentagonal grooves, hexagonal grooves, etc.

[0086] The plurality of main buffer grooves 11, 12, 13, 14, 15 and the plurality of auxiliary buffer grooves 21, 22, 23, 24 may be bilaterally symmetrical with respect to the left-right center of the seat cushion 111. The plurality of auxiliary buffer grooves 21, 22, 23, 24 may be arranged in an oblique line, closer to the left-right center of the seat cushion 111 toward the front.

[0087] The plurality of main buffer grooves 11, 12, 13, 14, 15 may include: a plurality of first main buffer grooves 11, a plurality of second main buffer grooves 12, a plurality of third main buffer grooves 13, a plurality of fourth main buffer grooves 14, and a plurality of fifth main buffer grooves 15. However, the plurality of fourth main buffer grooves 14 and a plurality of fifth main buffer grooves 15 may not be formed in the center portion of the lower surface of the seat cushion 111, but only a plurality of first main buffer grooves 11, a plurality of second main buffer grooves 12, and a plurality of third main buffer grooves 13 may be formed.

[0088] The first main buffer slots 11, the second main buffer slots 12 and the third main buffer slots 13 may be formed in the same number. In this embodiment, the first main buffer slots 11, the second main buffer slots 12 and the third main buffer slots 13 are each five in number.

[0089] The plurality of fourth main buffer slots 14 and the plurality of fifth main buffer slots 15 may be formed in the same number. The number of each of the plurality of fourth main buffer slots 14 and the plurality of fifth main buffer slots 15 may be one less than the number of each of the plurality of first main buffer slots 11, the plurality of second main buffer slots 12, and the plurality of third main buffer slots 13. In this embodiment, the number of each of the plurality of fourth main buffer slots 14 and the plurality of fifth main buffer slots 15 is 4.

[0090] The frontmost main buffer slots of each of the multiple fourth main buffer slots 14 and the multiple fifth main buffer slots 15 can be configured to be spaced in the left and right directions from the second main buffer slots arranged in front of each of the multiple first main buffer slots 11, the multiple second main buffer slots 12 and the multiple third main buffer slots 13.

[0091] The plurality of first main buffer grooves 11 are arranged at a left-right center of the seat cushion 111 so as to be spaced from each other in the front-rear direction.

[0092] The plurality of second main buffer grooves 12 may be spaced to the left from the plurality of first main buffer grooves 11. The plurality of second main buffer grooves 12 may be spaced from each other in the front-rear direction.

[0093] The plurality of third main buffer grooves 13 may be spaced apart from the plurality of first main buffer grooves 11 to the right. The plurality of third main buffer grooves 13 may be spaced apart from each other in the front-rear direction.

[0094] The plurality of fourth main buffer grooves 14 may be spaced to the left from the plurality of second main buffer grooves 12. The plurality of fourth main buffer grooves 14 may be spaced from each other in the front-rear direction.

[0095] The plurality of fifth main buffer grooves 15 may be spaced apart from the plurality of third main buffer grooves 13 to the right. The plurality of fifth main buffer grooves 15 may be spaced apart from each other in the front-rear direction.

[0096] The plurality of auxiliary buffer grooves 21, 22, 23, 24 may include: a plurality of first auxiliary buffer grooves 21, a plurality of second auxiliary buffer grooves 22, a plurality of third auxiliary buffer grooves 23, and a plurality of fourth auxiliary buffer grooves 24. However, the plurality of third auxiliary buffer grooves 23 and a plurality of fourth auxiliary buffer grooves 24 may not be formed in the center portion of the lower surface of the seat cushion 111, but only a plurality of first auxiliary buffer grooves 21 and a plurality of second auxiliary buffer grooves 22 may be formed.

[0097] The plurality of first auxiliary buffer slots 21 may be respectively connected to the plurality of first main buffer slots 11 and the plurality of second main buffer slots 12. The plurality of first auxiliary buffer slots 21 may be arranged between the plurality of first main buffer slots 11 and the plurality of second main buffer slots 12 in an oblique line.

[0098] The plurality of second auxiliary buffer slots 22 may be respectively connected to the plurality of first main buffer slots 11 and the plurality of third main buffer slots 13. The plurality of second auxiliary buffer slots 22 may be arranged between the plurality of first main buffer slots 11 and the plurality of third main buffer slots 13 in an oblique line.

[0099] The third auxiliary buffer slots 23 may be respectively connected to the second main buffer slots 12 and the fourth main buffer slots 14. The third auxiliary buffer slots 23 may be arranged between the second main buffer slots 12 and the fourth main buffer slots 14 in an oblique line.

[0100] The fourth auxiliary buffer slots 24 may be respectively connected to the third main buffer slots 13 and the fifth main buffer slots 15. The fourth auxiliary buffer slots 24 may be arranged between the third main buffer slots 13 and the fifth main buffer slots 15 in an oblique line.

[0101] The front ends of the plurality of first sub-buffer slots 21 may be respectively connected to the plurality of first main buffer slots 11. The rear ends of the plurality of first sub-buffer slots 21 may be respectively connected to the plurality of second main buffer slots 12, which are arranged in a row immediately after the plurality of first main buffer slots 11 connected to the front ends of the plurality of first sub-buffer slots 21.

[0102] The front ends of the plurality of second sub-buffer slots 22 may be respectively connected to the plurality of first main buffer slots 11. The rear ends of the plurality of second sub-buffer slots 22 may be respectively connected to the plurality of third main buffer slots 13, which are arranged in a row immediately after the plurality of first main buffer slots 11 connected to the front ends of the plurality of second sub-buffer slots 22.

[0103] The front ends of the plurality of third sub-buffer slots 23 may be respectively connected to the plurality of second main buffer slots 12. The rear ends of the plurality of third sub-buffer slots 23 may be respectively connected to the plurality of fourth main buffer slots 14, which are arranged in a row immediately after the plurality of second main buffer slots 12 connected to the front ends of the plurality of third sub-buffer slots 23.

[0104] Front ends of the plurality of fourth auxiliary buffer slots 24 may be respectively connected to the plurality of third main buffer slots 13. Rear ends of the plurality of fourth auxiliary buffer slots 24 may be respectively connected to the plurality of fifth main buffer slots 15, which are arranged in a row immediately after the plurality of third main buffer slots 13 connected to the front ends of the plurality of fourth auxiliary buffer slots 24.

[0105] On the other hand, an insertion groove 30 may be formed below the seat cushion 111. The seat plate 112 supporting the seat cushion 111 may be inserted into the insertion groove 30. A plurality of buffer grooves 11, 12, 13, 14, 15, 21, 22, 23, 24 may be formed above the insertion groove 30.

[0106] A frame groove 35 may be formed on the upper frame of the insertion groove 30. In this case, a frame protrusion 112A may be formed on the upper frame of the seat plate 112. The frame protrusion 112A formed on the upper frame of the seat plate 112 may be inserted into the frame groove 35. In this case, a plurality of buffer grooves 11, 12, 13, 14, 15, 21, 22, 23, 24 may be formed on the inner side of the frame groove 35 in the upper surface of the insertion groove 30.

[0107] However, the insertion groove 30 and the frame groove 35 do not necessarily need to be formed on the bottom surface of the seat cushion 111 , and may not be formed.

[0108] Figure 8 It is shown Figure 5 A cross-sectional view of the upper and lower thickness of the seat cushion and the depth of multiple main buffer grooves.

[0109] Reference Figure 8 , the upper and lower thickness T1 from the upper ends of the plurality of main buffer grooves 11, 12, 13, 14, 15 to the upper end of the seat cushion 111 may be formed at 30 to 40 mm. In the case where the upper and lower thickness T1 from the upper ends of the plurality of main buffer grooves 11, 12, 13, 14, 15 to the upper end of the seat cushion 111 is less than 30 mm, there may be a problem that the user can feel the boundaries of the plurality of main buffer grooves 11, 12, 13, 14, 15 when sitting on the seat 110; in the case where the upper and lower thickness T1 from the upper ends of the plurality of main buffer grooves 11, 12, 13, 14, 15 to the upper end of the seat cushion 111 is greater than 40 mm, there may be a problem that the user cannot feel the buffering force increased by the plurality of main buffer grooves 11, 12, 13, 14, 15 when sitting on the seat 110.

[0110] The depth T2 of the plurality of main buffer grooves 11, 12, 13, 14, 15 may be greater than half of the upper and lower thickness T of the seat cushion 111. In the present embodiment, the upper and lower thickness T of the seat cushion 111 is formed to be 63.86 mm, the depth T2 of each of the plurality of main buffer grooves 11, 12, 13, 14, 15 is formed to be 33.86 mm, and the upper and lower thickness T1 from the upper ends of the plurality of main buffer grooves 11, 12, 13, 14, 15 to the upper end of the seat cushion 111 may be formed to be 30 mm. However, the upper and lower thickness T of the seat cushion 111 can be 50 to 70 mm depending on the specifications of the chair, and various changes can be made. Therefore, the depth T2 of the multiple main buffer grooves 11, 12, 13, 14, and 15 does not necessarily have to be greater than half of the upper and lower thickness T of the seat cushion 111, but the upper and lower thickness T1 from the upper ends of the multiple main buffer grooves 11, 12, 13, 14, and 15 to the upper end of the seat cushion 111 is formed in the range of 30 to 40 mm, and various depths can be changed for implementation.

[0111] Fig. 9 yes Figure 6 The BB line cross-sectional view is a diagram showing the deformation of the seat cushion for a chair according to an embodiment of the present invention when the user's sitting load acts on the seat. Here, the second auxiliary buffer groove 22 is described as an example, but the main buffer grooves 11, 12, 13, 14, 15 and the auxiliary buffer grooves 21, 22, 23, 24 located below the portion of the seat cushion 111 where the user's sitting load acts may also be deformed.

[0112] Reference Fig. 9If the user's sitting load acts on the upper side of the seat cushion 111 as indicated by the arrow, the lower part of the seat cushion 111 is in a stopped state due to the friction between the lower part of the seat cushion 111 and the seat plate 112, while the upper part of the seat cushion 111 can be in a state of being able to move in the direction of the user's sitting load. At this time, the buffer groove (here, the second auxiliary buffer groove 22) formed on the lower side of the seat cushion 111 is deformed as shown by the double-dotted line, allowing the user to feel a soft feeling.

[0113] In addition, the plurality of main buffer grooves 11, 12, 13, 14, 15 can make the center of the seat cushion 111 easily deformed with the weight of the user sitting on the seat 110, and the plurality of sub-buffer grooves 21, 22, 23, 24 are deformed in the direction of the user sitting down when pressed by the weight of the user sitting on the seat 110, and the inner walls of the plurality of sub-buffer grooves 21, 22, 23, 24 are tilted, and the inner walls are tilted by the width of each of the plurality of sub-buffer grooves 21, 22, 23, 24, and the deformation amount of the seat cushion 111 as a whole is increased accordingly, so that the user can experience the improvement of the comfort of the seat. Since the deformation of the plurality of main buffer grooves 11, 12, 13, 14, 15 and the plurality of sub-buffer grooves 21, 22, 23, 24 occurs under the seat cushion 111, the appearance of the seat cushion 111 does not change, and the user can feel comfortable.

[0114] As described above, the seat cushion 111 for a chair according to an embodiment of the present invention is that since the plurality of sub-buffer grooves 21, 22, 23, 24 are formed to be narrower and shallower in width and depth than the plurality of main buffer grooves 11, 12, 13, 14, 15, when a user sits on the seat 110 of the chair 1, due to the weight of the user, the plurality of main buffer grooves 11, 12, 13, 14, 15 and the plurality of sub-buffer grooves 21, 22, 23, 24 are deformed, and at the same time, the inner walls of the plurality of main buffer grooves 11, 12, 13, 14, 15 and the inner walls of the plurality of sub-buffer grooves 21, 22, 23, 24 are tilted, and at this time, the overall shape of the seat cushion 111 is not excessively affected, thereby improving the comfort of the seat. In addition, through the upper and lower depth differences of the multiple main buffer grooves 11, 12, 13, 14, 15 and the multiple auxiliary buffer grooves 21, 22, 23, 24, the user will not feel collapsed in the part of the seat 110 that directly contacts the body, thereby improving the comfort of the overall area of ​​the seat 110.

[0115] A person skilled in the art with common knowledge in the technical field to which the present invention belongs may understand that the present invention can be implemented in other specific forms without changing the technical concept or essential features of the present invention. Therefore, the embodiments described above should only be understood as being exemplary in all aspects, rather than restrictive. The scope of the present invention should be reflected by the scope of the claims, rather than the above detailed description, and all changes or deformations derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention.

[0116] Industrial Applicability

[0117] The present invention provides a seat cushion for a chair and a seat for a chair comprising the same, wherein a plurality of buffer grooves are formed at the center of the lower portion thereof and deformed according to the user's sitting load, thereby improving the comfort of the seat through a simple structure.

Claims

1. A seat cushion for a chair, wherein a plurality of buffer grooves are formed at the center of the bottom thereof so as to deform according to the load of the user's seat. The plurality of buffer tanks include: A plurality of main buffer slots are arranged in a plurality of rows in the front-to-rear direction and the left-to-right direction and are spaced the same distance apart from each other; and The plurality of sub-buffer grooves are respectively connected to the plurality of main buffer grooves and are formed in a linear shape with a width and a depth narrower and shallower than those of the plurality of main buffer grooves.

2. The seat cushion for a chair according to claim 1, characterized in that: The vertical thickness from the upper ends of the plurality of main buffer grooves to the upper end of the seat cushion is formed to be 30 to 40 mm.

3. The seat cushion for a chair according to claim 2, characterized in that: The main buffer grooves are formed to have a depth greater than a half of a top-bottom thickness of the seat cushion.

4. The seat cushion for a chair according to claim 1, characterized in that: The plurality of main buffer grooves and the plurality of auxiliary buffer grooves are bilaterally symmetrical with respect to the left-right center of the seat cushion; The plurality of auxiliary buffer grooves are arranged in an oblique line and are closer to the left-right center of the seat cushion toward the front.

5. The seat cushion for a chair according to claim 4, characterized in that: The plurality of main buffer tanks include: A plurality of first main buffer grooves are arranged at intervals in a front-rear direction at the left-right center of the seat cushion; A plurality of second main buffer slots are spaced to the left from the plurality of first main buffer slots and are spaced from each other in a front-to-rear direction; A plurality of third main buffer slots are spaced to the right from the plurality of first main buffer slots and are spaced from each other in a front-to-rear direction; The plurality of secondary buffer tanks include: A plurality of first secondary buffer slots, respectively connected to the plurality of first main buffer slots and the plurality of second main buffer slots; A plurality of second sub-buffer slots are respectively connected to the plurality of first main buffer slots and the plurality of third main buffer slots.

6. The seat cushion for a chair according to claim 5, characterized in that: The plurality of first secondary buffer slots are arranged in an oblique line, with front ends respectively connected to the plurality of first main buffer slots, and rear ends respectively connected to the plurality of second main buffer slots, and the plurality of second main buffer slots are arranged in a row immediately after the plurality of first main buffer slots connected to the front ends of the plurality of first secondary buffer slots; The multiple second sub-buffer slots are arranged in an oblique line, with front ends respectively connected to the multiple first main buffer slots and rear ends respectively connected to the multiple third main buffer slots. The multiple third main buffer slots are arranged in a row immediately after the multiple first main buffer slots connected to the front ends of the multiple second sub-buffer slots.

7. The seat cushion for a chair according to claim 5, characterized in that: The plurality of main buffer tanks also include: A plurality of fourth main buffer slots, spaced to the left from the plurality of second main buffer slots and spaced from each other in a front-to-rear direction; A plurality of fifth main buffer slots, spaced to the right from the plurality of third main buffer slots and spaced from each other in a front-to-rear direction; The plurality of secondary buffer tanks further include: The plurality of third secondary buffer slots are respectively connected to the plurality of second main buffer slots and the plurality of fourth main buffer slots; The plurality of fourth sub-buffer slots are respectively connected to the plurality of third main buffer slots and the plurality of fifth main buffer slots.

8. The seat cushion for a chair according to claim 7, characterized in that: The plurality of first secondary buffer slots are arranged in an oblique line, with front ends respectively connected to the plurality of first main buffer slots, and rear ends respectively connected to the plurality of second main buffer slots, and the plurality of second main buffer slots are arranged in a row immediately after the plurality of first main buffer slots connected to the front ends of the plurality of first secondary buffer slots; The plurality of second auxiliary buffer slots are arranged in an oblique line, with front ends respectively connected to the plurality of first main buffer slots, and rear ends respectively connected to the plurality of third main buffer slots, and the plurality of third main buffer slots are arranged in a row immediately after the plurality of first main buffer slots connected to the front ends of the plurality of second auxiliary buffer slots; The plurality of third auxiliary buffer slots are arranged in an oblique line, with front ends respectively connected to the plurality of second main buffer slots, and rear ends respectively connected to the plurality of fourth main buffer slots, and the plurality of fourth main buffer slots are arranged in a row immediately after the plurality of second main buffer slots connected to the front ends of the plurality of third auxiliary buffer slots; The plurality of fourth sub-buffer slots are arranged in an oblique line, with front ends respectively connected to the plurality of third main buffer slots and rear ends respectively connected to the plurality of fifth main buffer slots. The plurality of fifth main buffer slots are arranged in a row immediately following the plurality of third main buffer slots connected to the front ends of the plurality of fourth sub-buffer slots.

9. The seat cushion for a chair according to claim 7, characterized in that: The number of each of the plurality of fourth main buffer slots and the plurality of fifth main buffer slots is one less than the number of each of the plurality of first main buffer slots, the plurality of second main buffer slots, and the plurality of third main buffer slots; The frontmost main buffer slot of each of the plurality of fourth main buffer slots and the plurality of fifth main buffer slots is arranged to be spaced in the left-right direction from the second main buffer slot arranged in front of each of the plurality of first main buffer slots, the plurality of second main buffer slots and the plurality of third main buffer slots.

10. The seat cushion for a chair according to claim 1, characterized in that: The plurality of main buffer grooves are formed as circular grooves.

11. The seat cushion for a chair according to claim 1, characterized in that: The plurality of main buffer grooves are formed as polygonal grooves.

12. The seat cushion for a chair according to claim 1, characterized in that: An insertion groove is formed under the seat cushion, and the insertion groove is inserted into a seat plate supporting the seat cushion; The plurality of buffer grooves are formed on an upper surface of the insertion groove.

13. The seat cushion for a chair according to claim 12, characterized in that: A frame groove is formed on the upper frame of the insertion groove, and the frame groove is inserted into the frame protrusion formed on the upper frame of the seat plate; The plurality of buffer grooves are formed at an inner side of the frame groove in an upper surface of the insertion groove.

14. A chair seat, comprising: The seat cushion has a plurality of buffer grooves formed at the center of the lower portion thereof, which are deformed according to the user's sitting load; and A seat plate supporting the seat cushion; Wherein, the plurality of buffer slots include: A plurality of main buffer slots are arranged in a plurality of rows in the front-to-rear direction and the left-to-right direction and are spaced the same distance apart from each other; The plurality of sub-buffer grooves are respectively connected to the plurality of main buffer grooves and are formed in a linear shape having a narrower and shallower width and depth than the plurality of main buffer grooves.

15. The chair seat according to claim 14, characterized in that: An insertion groove for inserting the seat plate is formed below the seat cushion; The plurality of buffer grooves are formed on an upper surface of the insertion groove.

Images