KR20240008573A - Seat cushion for chair - Google Patents

Abstract

A seat cushion for a chair is provided that improves seating comfort with a simple structure by forming a plurality of cushion grooves that are deformed by the user's seating load in the center of the lower surface.
For this purpose, the seat cushion for a chair according to the present invention is a seat cushion for a chair having a plurality of cushion grooves formed in the center of the lower surface that are deformed by the user's seating load, and the plurality of cushion grooves are located in the front-back and left-right directions. A plurality of main cushion grooves, each arranged in a plurality of rows and spaced apart from each other at equal intervals, and a plurality of sub cushions each connected to the plurality of main cushion grooves and formed in a straight line that is narrower and less deep than the plurality of main cushion grooves. Includes home.

Description

Seat cushion for chair {SEAT CUSHION FOR CHAIR}

The present invention relates to a seat cushion for a chair, and more specifically, to a seat cushion for a chair with a simple structure and improved seating comfort by forming a plurality of cushion grooves in the center of the lower surface that are deformed by the user's seating load.

In general, the sponge applied to the chair seat creates a sitting feeling only by the material characteristics and shape without a separate structure to improve the sitting feeling. When a sponge of uniform thickness is applied to a chair seat, there is a problem in that when the user sits on the chair seat, the central shape of the sponge feels relatively raised due to the structure of the human body, causing the user to feel uncomfortable.

To solve this problem, when the central shape of the sponge is made concave, the external shape of the chair seat is easily deformed and the thickness is reduced, which causes a decrease in cushioning force.

In addition, the cushioning force of the chair seat can be adjusted by adjusting the physical properties of the sponge, but there is a limit to adjusting the optimal physical properties of the sponge for optimal cushioning force of the chair seat.

Republic of Korea Patent Publication No. 10-2073647 (2020.02.05.) (hereinafter referred to as 'prior art') discloses a 'chair seat cushion' that is fastened to the upper part of the chair seat frame to enable comfortable seating. It is done.

The prior art consists of memory foam, an elastic body, and a stopper spring. The memory foam forms an external cushion. The elastic body is inserted into the receiving part formed in the lower part of the memory foam, and is made of an elastic material softer than the memory foam, and is provided with a plurality of fastening holes on both sides to form an internal cushion. The stopper spring is fastened to the fastening hole of the elastic body, and when considering the center as the starting point, the size of the outer springs is relatively large and long, so that both sides of the seat cushion are higher than the center, so that when the user sits, it supports the thighs and supports the legs. By preventing the spread, the user's sitting comfort is improved.

However, in the prior art, because the configuration for improving seating comfort consists of the memory foam, the elastic body, and the stopper spring, there was a problem in that the assembly time and cost increased due to the complicated structure.

Republic of Korea Patent Publication No. 10-2073647 (2020.02.05.)

The problem to be solved by the present invention is to provide a seat cushion for a chair that has a simple structure and improves seating comfort by forming a plurality of cushion grooves in the center of the lower surface that are deformed by the user's seating load.

The object of the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, a plurality of cushion grooves that are deformed by the user's sitting load are formed in the central portion of the lower surface of the seat cushion for a chair according to the present invention. The plurality of cushion grooves are composed of a plurality of main cushion grooves and a plurality of sub cushion grooves. The plurality of main cushion grooves are arranged in a plurality of rows in the front-back and left-right directions and are spaced apart from each other at equal intervals. The plurality of sub cushion grooves respectively connect the plurality of main cushion grooves. The plurality of sub cushion grooves are formed in a straight line with a narrower width and less depth than the plurality of main cushion grooves.

The top and bottom thickness from the top of the plurality of main cushion grooves to the top of the left cushion may be 30 to 40 mm.

The depth of the plurality of main cushion grooves may be deeper than half the top and bottom thickness of the seat cushion.

The plurality of main cushion grooves and the plurality of sub cushion grooves may be left and right symmetrical with respect to the left and right center of the seat cushion. The plurality of sub-cushion grooves may be arranged diagonally closer to the center of the seat cushion in the left and right directions as it moves forward.

The plurality of main cushion grooves may be composed of a plurality of first main cushion grooves, a plurality of second main cushion grooves, and a plurality of third main cushion grooves. The plurality of first main cushion grooves may be arranged to be spaced apart from each other in the front and rear directions in the center of the seat cushion in the left and right directions. The plurality of second main cushion grooves may be spaced apart to the left from the plurality of first main cushion grooves. The plurality of second main cushion grooves may be arranged to be spaced apart from each other in the front and rear directions. The plurality of third main cushion grooves may be spaced to the right from the plurality of first main cushion grooves. The plurality of third main cushion grooves may be arranged to be spaced apart from each other in the front and rear directions. The plurality of sub cushion grooves may be composed of a plurality of first sub cushion grooves and a plurality of second sub cushion grooves. The plurality of first sub cushion grooves may respectively connect the plurality of first main cushion grooves and the plurality of second main cushion grooves. The plurality of second sub cushion grooves may respectively connect the plurality of first main cushion grooves and the plurality of third main cushion grooves.

The plurality of first sub cushion grooves may be arranged diagonally. Front ends of the plurality of first sub cushion grooves may each be connected to the plurality of first main cushion grooves. The rear ends of the plurality of first sub cushion grooves may be respectively connected to the plurality of second main cushion grooves disposed in a row immediately behind the plurality of first main cushion grooves to which the front ends of the plurality of first sub cushion grooves are connected. . The plurality of second sub cushion grooves may be arranged diagonally. Front ends of the plurality of second sub cushion grooves may each be connected to the plurality of first main cushion grooves. The rear ends of the plurality of second sub cushion grooves may be respectively connected to the plurality of third main cushion grooves disposed in a row immediately behind the plurality of first main cushion grooves to which the front ends of the plurality of second sub cushion grooves are connected. .

The plurality of main cushion grooves may further include a plurality of fourth main cushion grooves and a plurality of fifth main cushion grooves. The plurality of fourth main cushion grooves may be spaced apart to the left from the plurality of second main cushion grooves. The plurality of fourth main cushion grooves may be arranged to be spaced apart from each other in the front and rear directions. The plurality of fifth main cushion grooves may be spaced to the right from the plurality of third main cushion grooves. The plurality of fifth main cushion grooves may be arranged to be spaced apart from each other in the front and rear directions. The plurality of sub cushion grooves may further include a plurality of third sub cushion grooves and a plurality of fourth sub cushion grooves. The plurality of third sub cushion grooves may respectively connect the plurality of second main cushion grooves and the plurality of fourth main cushion grooves. The plurality of fourth sub cushion grooves may respectively connect the plurality of third main cushion grooves and the plurality of fifth main cushion grooves.

The plurality of third sub cushion grooves may be arranged diagonally. Front ends of the plurality of third sub cushion grooves may each be connected to the plurality of second main cushion grooves. The rear ends of the plurality of third sub cushion grooves may be respectively connected to the plurality of fourth main cushion grooves disposed in a row immediately behind the plurality of second main cushion grooves to which the front ends of the plurality of third sub cushion grooves are connected. . The plurality of fourth sub cushion grooves may be arranged diagonally. Front ends of the plurality of fourth sub cushion grooves may each be connected to the plurality of third main cushion grooves. The rear ends of the plurality of fourth sub cushion grooves may be respectively connected to the plurality of fifth main cushion grooves disposed in a row immediately behind the plurality of third main cushion grooves to which the front ends of the plurality of fourth sub cushion grooves are connected. .

The number of each of the plurality of fourth main cushion grooves and the plurality of fifth main cushion grooves is the number of each of the plurality of first main cushion grooves, the plurality of second main cushion grooves, and the plurality of third main cushion grooves. It can be formed in a number that is one less than the number. The plurality of fourth main cushion grooves and the plurality of fifth main cushion grooves are disposed at the forefront of each of the plurality of first main cushion grooves, the plurality of second main cushion grooves, and the plurality of third main cushion grooves. It may be arranged to be spaced apart in the left and right directions from the second arranged in front of each cushion groove.

The plurality of main cushion grooves may be formed as circular grooves.

The plurality of main cushion grooves may be formed as polygonal grooves.

An insertion groove may be formed on the lower surface of the seat cushion. The upper part of the seat plate supporting the seat cushion may be inserted into the insertion groove. A border groove may be formed on the upper edge of the insertion groove. A border protrusion formed on the upper surface edge of the seat plate may be inserted into the edge groove. The plurality of cushion grooves may be formed inside the edge groove on the upper surface of the insertion groove.

Specific details of other embodiments are included in the detailed description and drawings.

The seat cushion for a chair according to the present invention has a plurality of cushion grooves deformed by the user's sitting load formed in the center of the lower surface, and the plurality of cushion grooves include a plurality of main cushion grooves and a plurality of sub cushion grooves, Since the plurality of sub cushion grooves are narrower and less deep than the plurality of main cushion grooves, when the user sits on the seat of the chair, the plurality of main cushion grooves and the plurality of sub cushion grooves are moved by the user's body weight. As the sub cushion grooves are deformed and the inner walls of the plurality of main cushion grooves and the inner walls of the plurality of sub cushion grooves are tilted, the overall shape of the seat cushion is not excessively harmed, thereby improving seating comfort, and the plurality of main cushion grooves Through the difference in the upper and lower depths of the cushion groove and the plurality of sub-cushion grooves, there is an effect of improving the sitting feeling in the entire area of the seat plate by preventing the user from feeling collapsed in the part of the seat plate that directly touches the body. .

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing a chair equipped with a seat cushion according to an embodiment of the present invention;
Figure 2 is a rear perspective view of Figure 1;
Figure 3 is a perspective view showing a seat cushion for a chair according to an embodiment of the present invention;
Figure 4 is a perspective view from the bottom of Figure 3;
Figure 5 is a bottom view of Figure 3;
Figure 6 is a cross-sectional view taken along line AA of Figure 5;
Figure 7 is a cross-sectional view showing the top and bottom thickness of the seat cushion shown in Figure 4 and the depth of a plurality of main cushion grooves;
Figure 8 is a cross-sectional view taken along line BB of Figure 5 and a diagram showing the deformation of the seat cushion for a chair according to an embodiment of the present invention when a user's seating load acts on the chair seat.

Hereinafter, a seat cushion for a chair according to an embodiment of the present invention will be described with reference to the drawings. In the description below, terms related to the up-down, forward-backward, left-right directions refer to the up-down, front-back, left-right directions shown in Figures 1 to 5.

Figure 1 is a perspective view showing a chair equipped with a seat cushion according to an embodiment of the present invention, and Figure 2 is a rear perspective view of Figure 1.

Referring to Figures 1 and 2, a chair 1 on which a seat cushion 111 for a chair according to an embodiment of the present invention is installed includes a chair body 100, an adjustment device 200, and a leg portion 300. It may include a back post 400 and armrests 510 and 520.

The chair body 100 may include a seat plate 110, a back plate 120, and a headrest 130. The seat plate 110, back plate 120, and headrest 130 may be formed in a substantially square shape.

The seat plate 110 may extend forward and backward. The seat plate 110 may be a part where the user sits. The seat plate 110 may support the user's buttocks and the thighs of each of the user's legs.

Among the upper surfaces of the seat plate 110, the rear portion, which is the portion that supports the user's hips, may be formed to be slightly recessed to the lower side, and the front portion, which is the portion that supports both thighs of the user, may be formed to be inclined closer to the lower side as it moves forward. You can.

The back plate 120 may extend up and down so that the lower end is positioned forward than the upper end. The lower end of the back plate 120 may be hinged to the back plate post 400. Here, the hinge may include a long horizontal axis left and right. The back plate 120 may be formed as a separate structure separate from the seat plate 110.

The headrest 130 may extend up and down. The headrest 130 may be coupled to the front upper part of the back panel 120. The headrest 130 may be formed integrally with the back plate 120, and the lower end of the headrest 130 may be coupled to the front of the upper end of the back plate 120 so as to be rotatable about a long horizontal axis from side to side.

The seat plate 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 made of a material with cushioning power to provide a cushioning feeling to the user, and the seat plate 112 is made of a harder material than the seat cushion 111 to support the seat cushion 111. .

The seat plate 110 may further include a textile cover (not shown). The fiber cover is covered with the seat cushion 111 and the seat plate 112 from the upper side of the seat cushion 111, and the central portion of the fiber cover can cover the upper surface of the seat cushion 111, and the fiber cover The edge portion may cover the lower edge portion of the seat plate 112.

The back panel 120 may be a part that supports the user's back. The back panel 120 may include a back cushion 121 and a back board frame 122. The back cushion 121 may be placed in front of the back frame 122. The back cushion 121 is made of a material with cushioning power to provide a cushioning feeling to the user, and the back frame 122 is made of a harder material than the back cushion 121 and can support the back cushion 121. .

The back frame 122 may include a back plate 123 and a lumbar 124.

The backrest plate 123 can support the user's back and waist load. A back plate connector 700 made of a flexible material may be disposed on the rear of the back plate 123. The backrest connector 700 may connect the backrest plate 123 of the backrest frame 122 and a backrest slider (not shown) that is slidably coupled to the front upper end of the backrest post 400. The backrest connector 700 is made of a soft material that can be deformed by the user's load, and can move the backrest frame 122 in the direction in which the user's load acts.

When a user sits on the chair 1, the lower end of the backrest plate 123 may be disposed to face the user's waist. The lumbar 124 is coupled to the rear lower end of the backrest plate 123 and can support the load on the user's lower back.

The headrest 130 may be a part that supports the user's head. The headrest 130 may include a headrest cushion 131 and a headrest plate 132. The headrest cushion 131 may be placed in front of the headrest plate 132. The headrest cushion 131 is made of a material with cushioning power to provide a cushioning feeling to the user, and the headrest plate 132 is made of a harder material than the headrest cushion 131 to provide the headrest cushion 131. I can support it.

The seat cushion 111, the back cushion 121, and the headrest cushion 131 may be formed of the same material, and the seat plate 112, the back frame 122, and the headrest plate 132 may be formed of the same material. It can be. For example, the seat cushion 111, the back cushion 121, and the headrest cushion 131 may be formed of sponge, and the seat plate 112, the back frame 122, and the headrest plate 132 may be formed of the above. It can be formed from a plastic that is harder than sponge.

The sponge may be a polyurethane foam sponge. Specifically, the sponge may be formed by stirring the main raw material, foaming agent, dispersant, catalyst, and water and then foam molding. Here, at least one of TDI (Toluene-2.4-Diisocyanate) and MDI (Methylene Dipara-Phenylen Isocyanate) may be used as the main raw material. In addition, the foaming agent may be used as an organic foaming agent such as nitroalkane, aldoxime, activated ethylene compound, hydrophobic compound, cyclic tertiary alcohol, or 4-membered ring carbonyl compound, and inorganic foaming agent such as CCl₂F, CCl₃F, boric acid, and aluminum hydroxide. You can. And, the catalyst may be Dabco, stannath octiate, dibutyl dilaureth, or tertiary amine.

The seat cushion 111 does not necessarily have to be made of sponge, but may be made of a soft material similar to the sponge. That is, the seat cushion 111 may be formed of a soft material that can be deformed by the user's sitting load. For example, the seat cushion 111 may be made of latex or memory foam.

The seat plate 112 and the headrest plate 132 are formed to be slightly flexible and may be slightly deformed by the load of the user sitting on the chair 1.

In particular, the back plate 123 is made of an elastic material and is elastically deformed by the user's load acting on the back plate 120, thereby improving the seating comfort of the user sitting on the chair 1.

The control device 200 may be placed on the lower side of the seat plate 110. The control device 200 may be coupled to the lower side of the seat plate 112 of the seat plate 110. The adjusting device 200 can adjust the height of the chair body 100 as well as the front and rear angle of the back post 400.

The control device 200 may include two levers 210 and 220 that are operated by the user. Among the two levers 210 and 220, the first lever 210 may be a lever that is protrudingly disposed on the right side of the adjustment device 200 and adjusts the height of the chair body 100 by user manipulation, and the second lever 220 may be a lever that is protrudingly disposed on the left side of the adjustment device 200 and adjusts the front and rear angles of the backrest post 400 through user manipulation.

A cylinder device 350 may be installed at the center of the leg portion 300 to adjust 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 may be inserted into a hole formed to penetrate vertically through the center of the leg portion 300 and coupled to the center of the leg portion 300, and the piston rod may move up and down in the cylinder and rotate in the horizontal direction. can be combined. The upper end of the piston rod may be coupled to the adjusting device 200. When the user pulls the first lever 210 upward while sitting on the seat plate 110 of the chair body 100, the piston rod may be pulled out from within the cylinder through a hole formed at the top of the cylinder and moved upward. Through this, the user can adjust the height of the chair body 100.

The leg portion 300 may be disposed on the lower side of the adjusting device 200. The leg portion 300 may support the adjusting device 200. The leg portion 300 may include a plurality of leg bodies 310 arranged radially. In this embodiment, the plurality of leg bodies 310 are formed in five pieces, but it is possible if they are formed in three or more pieces. A wheel 320 may be rotatably coupled to each end of the plurality of leg bodies 310.

The backrest post 400 may support the backboard 120 . The upper part of the backboard post 400 may extend vertically, and the lower part of the backboard post 400 may be bent forward from the upper bottom of the backboard post 400 and extend forward. The top of the backrest post 400 may be placed below the top of the backboard 120 . The top of the back post 400 may be placed below the top of the back plate 123. The left and right widths of the back plate 400 may be narrower than the left and right widths of the back plate 120. The left and right widths of the back post 400 may be narrower than the left and right widths of the back plate 123. The upper part of the back board post 400 may be disposed opposite to the center of the back board 120 in the left and right directions at the rear of the back board 120. The upper part of the backrest post 400 may be disposed opposite to the center of the backrest plate 123 in the left and right directions at the rear of the backrest plate 123 .

The armrest units 510 and 520 may support the user's left and right arms. The armrest units 510 and 520 may include a left armrest unit 510 that supports the user's left arm and a right armrest unit 520 that supports the user's right arm. The left armrest portion 510 and the right armrest portion 520 may be formed with the same structure.

The left armrest unit 510 may include a left armrest post 511 and a left armrest 512.

The upper part of the left armrest post 511 may be extended vertically, and the lower part of the left armrest post 511 may be bent to the right from the upper bottom of the left armrest post 511 and extended to the right. The lower end of the left armrest post 511 may be coupled to the left side of the lower end of the back post 400.

The left armrest 512 may be a portion that substantially supports the user's left arm. The left pad, which is the uppermost component of the left armrest 512, may be in contact with the user's left arm. The left armrest 512 may have a left rod coupled to the lower side of the left pad. The left rod is inserted into the left armrest post 511 through a hole formed at the top of the left armrest post 511, and its height is adjusted by being pulled out or inserted into the left armrest post 511 by user manipulation. It can be. Additionally, the left pad may be configured to adjust its front and rear position relative to the left rod.

The upper part of the right armrest post 521 may be extended vertically, and the lower part of the right armrest post 521 may be bent to the left from the upper lower end of the right armrest post 521 and extended to the left. The lower end of the right armrest post 521 may be coupled to the right side of the lower end of the back post 400.

The right armrest 522 may be a portion that substantially supports the user's right arm. The right pad, which is the uppermost component of the right armrest 522, may be in contact with the user's right arm. The right armrest 522 may have a right rod coupled to the lower side of the right pad. The right rod is inserted into the right armrest post 521 through a hole formed at the top of the right armrest post 521, and its height is adjusted by being pulled out or inserted into the right armrest post 521 by user manipulation. It can be. Additionally, the right pad may be configured to adjust its front and rear position relative to the right rod.

Figure 3 is a perspective view showing a seat cushion for a chair according to an embodiment of the present invention, Figure 4 is a bottom perspective view of Figure 3, Figure 5 is a bottom view of Figure 3, and Figure 6 is a cross-sectional view taken along line A-A of Figure 5.

3 to 6, the central portion of the lower surface of the seat cushion 111 has a plurality of cushion grooves 11, 12, 13, 14, 15, 21, 22, 23, and 24 that are deformed by the user's sitting load. can be formed. A plurality of cushion grooves (11, 12, 13, 14, 15, 21, 22, 23, 24) include a plurality of main cushion grooves (11, 12, 13, 14, 15) and a plurality of sub cushion grooves (21, 22) , 23, 24).

The plurality of main cushion grooves 11, 12, 13, 14, and 15 may be arranged in a plurality of rows in the front-back and left-right directions and spaced apart from each other at equal intervals. In this embodiment, the plurality of main cushion grooves 11, 12, 13, 14, and 15 may be formed as circular grooves.

The plurality of sub cushion grooves 21, 22, 23, and 24 may respectively connect the plurality of main cushion grooves 11, 12, 13, 14, and 15. The plurality of sub cushion grooves 21, 22, 23, and 24 may be formed in a straight line with a narrower width and less depth than the plurality of main cushion grooves 11, 12, 13, 14, and 15. The plurality of sub cushion grooves 21, 22, 23, and 24 may be arranged diagonally.

The plurality of main cushion grooves (11, 12, 13, 14, 15) are formed as circular grooves, and the plurality of sub cushion grooves (21, 22, 23, 24) are formed as straight grooves arranged diagonally, forming a seat cushion. It may be possible to press the upper center portion of the seat cushion 111 while maintaining the outer shape of the seat cushion 111.

However, the plurality of main cushion grooves 11, 12, 13, 14, and 15 do not necessarily have to be formed as circular grooves. That is, if the plurality of main cushion grooves 11, 12, 13, 14, and 15 are formed wider and deeper than the plurality of sub cushion grooves 21, 22, 23, and 24, the triangular groove, the square groove, It may be formed as a polygonal groove such as a pentagonal groove or a hexagonal groove.

The plurality of main cushion grooves (11, 12, 13, 14, 15) and the plurality of sub cushion grooves (21, 22, 23, 24) may be left and right symmetrical with respect to the left and right center of the seat cushion (111). The plurality of sub cushion grooves 21, 22, 23, and 24 may be arranged diagonally closer to the left and right center of the seat cushion 111 as it moves forward.

The plurality of main cushion grooves (11, 12, 13, 14, 15) includes a plurality of first main cushion grooves (11), a plurality of second main cushion grooves (12), and a plurality of third main cushion grooves (13). , may include a plurality of fourth main cushion grooves 14 and a plurality of fifth main cushion grooves 15. However, the plurality of fourth main cushion grooves 14 and the plurality of fifth main cushion grooves 15 may not be formed in the central portion of the lower surface of the seat cushion 111, and the plurality of first main cushion grooves 11 may not be formed. , only a plurality of second main cushion grooves 12 and a plurality of third main cushion grooves 13 may be formed.

The plurality of first main cushion grooves 11, the plurality of second main cushion grooves 12, and the plurality of third main cushion grooves 13 may be formed in the same number. In this embodiment, the number of the first main cushion grooves 11, the second main cushion grooves 12, and the third main cushion grooves 13 is five.

The number of the plurality of fourth main cushion grooves 14 and the plurality of fifth main cushion grooves 15 may be formed in the same number. Each of the plurality of fourth main cushion grooves 14 and the plurality of fifth main cushion grooves 15 includes a plurality of first main cushion grooves 11, a plurality of second main cushion grooves 12, and a plurality of first main cushion grooves 15. The number of main cushion grooves 13 may be one less than the number of each. In this embodiment, the number of the fourth main cushion grooves 14 and the fifth main cushion grooves 15 is four.

The plurality of fourth main cushion grooves 14 and the plurality of fifth main cushion grooves 15, respectively, are disposed at the frontmost side, including the plurality of first main cushion grooves 11 and the plurality of second main cushion grooves 12. ) and may be arranged to be spaced apart in the left and right directions from the second arranged in front of each of the plurality of third main cushion grooves 13.

The plurality of first main cushion grooves 11 may be arranged in the center of the seat cushion 111 in the left and right directions, spaced apart from each other in the front and rear directions.

The plurality of second main cushion grooves 12 may be spaced apart from the plurality of first main cushion grooves 11 to the left. The plurality of second main cushion grooves 12 may be arranged to be spaced apart from each other in the front and rear directions.

The plurality of third main cushion grooves 13 may be spaced apart from the plurality of first main cushion grooves 11 to the right. The plurality of third main cushion grooves 13 may be arranged to be spaced apart from each other in the front and rear directions.

The plurality of fourth main cushion grooves 14 may be spaced apart from the plurality of second main cushion grooves 12 to the left. The plurality of fourth main cushion grooves 14 may be arranged to be spaced apart from each other in the front and rear directions.

The plurality of fifth main cushion grooves 15 may be spaced to the right from the plurality of third main cushion grooves 13. The plurality of fifth main cushion grooves 15 may be arranged to be spaced apart from each other in the front and rear directions.

The plurality of sub cushion grooves 21, 22, 23, 24 includes a plurality of first sub cushion grooves 21, a plurality of second sub cushion grooves 22, a plurality of third sub cushion grooves 23, and , may include a plurality of fourth sub cushion grooves 24. However, the plurality of third sub-cushion grooves 23 and the plurality of fourth sub-cushion grooves 24 may not be formed in the central portion of the lower surface of the seat cushion 111, and the plurality of first sub-cushion grooves 21 may not be formed. And only a plurality of second sub cushion grooves 22 may be formed.

The plurality of first sub cushion grooves 21 may connect the plurality of first main cushion grooves 11 and the plurality of second main cushion grooves 12, respectively. The plurality of first sub cushion grooves 21 may be arranged diagonally between the plurality of first main cushion grooves 11 and the plurality of second main cushion grooves 12.

The plurality of second sub cushion grooves 22 may connect the plurality of first main cushion grooves 11 and the plurality of third main cushion grooves 13, respectively. The plurality of second sub cushion grooves 22 may be arranged diagonally between the plurality of first main cushion grooves 11 and the plurality of third main cushion grooves 13.

The plurality of third sub cushion grooves 23 may connect the plurality of second main cushion grooves 12 and the plurality of fourth main cushion grooves 14, respectively. The plurality of third sub cushion grooves 23 may be arranged diagonally between the plurality of second main cushion grooves 12 and the plurality of fourth main cushion grooves 14.

The plurality of fourth sub cushion grooves 24 may connect the plurality of third main cushion grooves 13 and the plurality of fifth main cushion grooves 15, respectively. The plurality of fourth sub cushion grooves 24 may be arranged diagonally between the plurality of third main cushion grooves 13 and the plurality of fifth main cushion grooves 15.

The front ends of the plurality of first sub cushion grooves 21 may be connected to the plurality of first main cushion grooves 11, respectively. The rear ends of the plurality of first sub cushion grooves 21 are a plurality of second main cushion grooves arranged in a row immediately behind the plurality of first main cushion grooves 11 to which the front ends of the plurality of first sub cushion grooves 21 are connected. Each can be connected to (12).

The front ends of the plurality of second sub cushion grooves 22 may each be connected to the plurality of first main cushion grooves 11. The rear ends of the plurality of second sub cushion grooves 22 are a plurality of third main cushion grooves arranged in a row immediately behind the plurality of first main cushion grooves 11 to which the front ends of the plurality of second sub cushion grooves 22 are connected. Each can be connected to (13).

The front ends of the plurality of third sub cushion grooves 23 may each be connected to the plurality of second main cushion grooves 12. The rear ends of the plurality of third sub cushion grooves 23 are a plurality of fourth main cushion grooves arranged in a row immediately behind the plurality of second main cushion grooves 12 to which the front ends of the plurality of third sub cushion grooves 23 are connected. Each can be connected to (14).

The front ends of the plurality of fourth sub cushion grooves 24 may each be connected to the plurality of third main cushion grooves 13. The rear ends of the plurality of fourth sub cushion grooves 24 are a plurality of fifth main cushion grooves arranged in a row immediately behind the plurality of third main cushion grooves 13 to which the front ends of the plurality of fourth sub cushion grooves 24 are connected. Each can be connected to (15).

Meanwhile, an insertion groove 30 may be formed on the lower surface of the seat cushion 111. The upper part of the seat plate 112 supporting the seat cushion 111 may be inserted into the insertion groove 30. A border groove 35 may be formed on the upper edge of the insertion groove 30. An edge protrusion (not shown) formed on the upper edge of the seat plate 112 may be inserted into the edge groove 35. A plurality of cushion grooves (11, 12, 13, 14, 15, 21, 22, 23, 24) may be formed inside the edge groove (35) of the upper surface of the insertion groove (30). However, the insertion groove 30 and the edge groove 35 are not necessarily formed on the lower surface of the seat cushion 111 and may not be formed.

Figure 7 is a cross-sectional view showing the top and bottom thickness of the seat cushion shown in Figure 4 and the depth of a plurality of main cushion grooves.

Referring to Figure 7, the upper and lower thickness T1 from the top of the plurality of main cushion grooves 11, 12, 13, 14, and 15 to the top of the seat cushion 111 may be formed to be 30 to 40 mm. If the top and bottom thickness (T1) from the top of the plurality of main cushion grooves (11, 12, 13, 14, 15) to the top of the seat cushion 111 is thinner than 30 mm, when the user sits on the seat plate 100, a plurality of There may be a problem in that the boundaries of the main cushion grooves (11, 12, 13, 14, 15) are felt, and from the top of the plurality of main cushion grooves (11, 12, 13, 14, 15) to the top of the seat cushion (111) If the top and bottom thickness (T1) is thicker than 40 mm, there may be a problem in that the user cannot feel the increase in cushioning force due to the plurality of main cushion grooves (11, 12, 13, 14, and 15) when sitting on the seat plate (100). You can.

The depth T2 of the plurality of main cushion grooves 11, 12, 13, 14, and 15 may be formed deeper than half the upper and lower thickness T of the seat cushion 111. In this embodiment, the top and bottom thickness (T) of the seat cushion 111 is formed at 63.86 mm, and the depth (T2) of each of the plurality of main cushion grooves (11, 12, 13, 14, and 15) is formed at 33.86 mm. , the upper and lower thickness T1 from the top of the plurality of main cushion grooves 11, 12, 13, 14, and 15 to the top of the seat cushion 111 may be formed to be 30 mm. However, since the top and bottom thickness (T) of the seat cushion 111 can be varied from 50 to 70 mm depending on the specifications of the chair, the depth of the plurality of main cushion grooves 11, 12, 13, 14, and 15 ( T2) does not necessarily have to be formed deeper than half the upper and lower thickness (T) of the seat cushion 111, and is formed from the top of the plurality of main cushion grooves 11, 12, 13, 14, and 15 into the seat cushion 111. The top and bottom thickness (T1) to the top of can be changed to various depths within the range of 30 to 40 mm.

Figure 8 is a cross-sectional view taken along line B-B of Figure 5 and a diagram showing the deformation of the seat cushion for a chair according to an embodiment of the present invention when a user's seating load acts on the chair seat. Here, the second sub cushion groove 22 is explained as an example, but the main cushion grooves 11, 12, 13, 14, 15 located below the portion of the seat cushion 111 where the user's seating load acts, and Deformation may occur in the sub cushion grooves 21, 22, 23, and 24.

Referring to FIG. 8, when a user's sitting load acts on the upper side of the seat cushion 111 as shown by the arrow, due to friction between the lower surface of the seat cushion 111 and the seat plate 112, the seat cushion 111 The lower part is in a stationary state and the upper part of the seat cushion 111 is movable in the direction of the user's seating load. At this time, the cushion groove formed on the lower surface of the seat cushion 111 (here, the second sub cushion groove 22) is formed. )) can be transformed as shown by the two-dot chain line to make the user feel soft.

In addition, the plurality of main cushion grooves 11, 12, 13, 14, and 15 can facilitate the deformation of the central part of the seat cushion 111 by the weight of the user sitting on the seat 110, and the plurality of sub cushion grooves (21, 22, 23, 24) is deformed in the direction in which the user sits when pressed by the weight of the user sitting on the seat plate 110, and the inner walls of the plurality of sub cushion grooves 21, 22, 23, 24 are tilted. The inner wall is inclined by the width of each of the plurality of sub-cushion grooves 21, 22, 23, and 24, and the amount of deformation of the entire seat cushion 111 increases accordingly, allowing the user to feel an improvement in seating comfort. Since deformation of the plurality of main cushion grooves 11, 12, 13, 14, 15 and the plurality of sub cushion grooves 21, 22, 23, 24 occurs on the lower surface of the seat cushion 111, the seat cushion ( Since the external shape of 111) does not change, the user can feel comfortable.

As described above, in the seat cushion 111 for a chair according to an embodiment of the present invention, a plurality of sub cushion grooves 21, 22, 23, 24 have a plurality of main cushion grooves 11, 12, 13, 14, 15. ), so when the user is sitting on the seat 110 of the chair 1, the plurality of main cushion grooves 11, 12, 13, 14 are formed by the user's body weight. 15) and the plurality of sub cushion grooves 21, 22, 23, 24 are deformed, the inner walls of the plurality of main cushion grooves 11, 12, 13, 14, 15 and the plurality of sub cushion grooves 21, 22, When the inner walls of 23 and 24) are tilted, the overall shape of the seat cushion 111 is not excessively damaged, thereby improving seating comfort. In addition, through the difference in upper and lower depths of the plurality of main cushion grooves (11, 12, 13, 14, 15) and the plurality of sub cushion grooves (21, 22, 23, 24), the user can directly touch the body of the seat plate 110. It is possible to improve the seating comfort over the entire area of the seat plate 110 by preventing the feeling of collapsing at the part that touches it.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

1: Chair 11: First main cushion groove
12: 2nd main cushion groove 13: 3rd main cushion groove
14: 4th main cushion groove 15: 5th main cushion groove
21: 1st sub cushion groove 22: 2nd sub cushion groove
23: 3rd sub cushion groove 24: 4th sub cushion groove
30: Insertion groove 35: Border groove
111: Seat cushion

Claims (12)

In the seat cushion for a chair, which has a plurality of cushion grooves formed in the lower center portion that are deformed by the user's sitting load,
The plurality of cushion grooves are,
a plurality of main cushion grooves arranged in a plurality of rows in the front-back and left-right directions and spaced apart from each other at equal intervals; and
A seat cushion for a chair comprising: a plurality of sub cushion grooves each connecting the plurality of main cushion grooves and formed in a straight line that is narrower and less deep than the plurality of main cushion grooves. In claim 1,
A seat cushion for a chair where the top and bottom thickness from the top of the plurality of main cushion grooves to the top of the seat cushion is 30 to 40 mm. In claim 2,
A seat cushion for a chair wherein the depth of the plurality of main cushion grooves is deeper than half the upper and lower thickness of the seat cushion. In claim 1,
The plurality of main cushion grooves and the plurality of sub cushion grooves are left and right symmetrical with respect to the left and right center of the seat cushion,
The plurality of sub-cushion grooves are arranged diagonally closer to the center of the left and right directions of the seat cushion as it moves forward. In claim 4,
The plurality of main cushion grooves are,
A plurality of first main cushion grooves arranged in the left and right center of the seat cushion to be spaced apart from each other in the front and rear directions,
a plurality of second main cushion grooves spaced to the left from the plurality of first main cushion grooves and arranged to be spaced apart from each other in the front-back direction;
It is spaced to the right from the plurality of first main cushion grooves and includes a plurality of third main cushion grooves arranged to be spaced apart from each other in the front and rear direction,
The plurality of sub cushion grooves are,
a plurality of first sub-cushion grooves respectively connecting the plurality of first main cushion grooves and the plurality of second main cushion grooves;
A seat cushion for a chair including a plurality of second sub-cushion grooves respectively connecting the plurality of first main cushion grooves and the plurality of third main cushion grooves. In claim 5,
The plurality of first sub cushion grooves have front ends connected to the plurality of first main cushion grooves, and rear ends immediately behind the plurality of first main cushion grooves to which front ends of the plurality of first sub cushion grooves are connected. Each of the plurality of second main cushion grooves arranged in a row is connected to each other and arranged diagonally,
The plurality of second sub cushion grooves have front ends connected to the plurality of first main cushion grooves, and rear ends immediately behind the plurality of first main cushion grooves to which front ends of the plurality of second sub cushion grooves are connected. A seat cushion for a chair that is connected to the plurality of third main cushion grooves arranged in a row and arranged diagonally. In claim 5,
The plurality of main cushion grooves are,
a plurality of fourth main cushion grooves spaced to the left from the plurality of second main cushion grooves and arranged to be spaced apart from each other in the front-back direction;
It further includes a plurality of fifth main cushion grooves spaced to the right from the plurality of third main cushion grooves and arranged to be spaced apart from each other in the front and rear directions,
The plurality of sub cushion grooves are,
a plurality of third sub-cushion grooves respectively connecting the plurality of second main cushion grooves and the plurality of fourth main cushion grooves;
A seat cushion for a chair further comprising a plurality of fourth sub-cushion grooves respectively connecting the plurality of third main cushion grooves and the plurality of fifth main cushion grooves. In claim 7,
The plurality of first sub cushion grooves have front ends connected to the plurality of first main cushion grooves, and rear ends immediately behind the plurality of first main cushion grooves to which front ends of the plurality of first sub cushion grooves are connected. Each of the plurality of second main cushion grooves arranged in a row is connected to each other and arranged diagonally,
The plurality of second sub cushion grooves have front ends connected to the plurality of first main cushion grooves, and rear ends immediately behind the plurality of first main cushion grooves to which front ends of the plurality of second sub cushion grooves are connected. They are each connected to the plurality of third main cushion grooves arranged in a row and arranged diagonally,
The plurality of third sub cushion grooves have front ends connected to the plurality of second main cushion grooves, and rear ends immediately behind the plurality of second main cushion grooves to which front ends of the plurality of third sub cushion grooves are connected. Each of the plurality of fourth main cushion grooves arranged in a row is connected to each other and arranged diagonally,
The plurality of fourth sub cushion grooves have front ends connected to the plurality of third main cushion grooves, and rear ends immediately behind the plurality of third main cushion grooves to which front ends of the plurality of fourth sub cushion grooves are connected. A seat cushion for a chair that is connected to the plurality of fifth main cushion grooves arranged in a row and arranged diagonally. In claim 7,
The number of each of the plurality of fourth main cushion grooves and the plurality of fifth main cushion grooves is the number of each of the plurality of first main cushion grooves, the plurality of second main cushion grooves, and the plurality of third main cushion grooves. It is formed in a number that is 1 less than the number,
The plurality of fourth main cushion grooves and the plurality of fifth main cushion grooves are disposed at the forefront of each of the plurality of first main cushion grooves, the plurality of second main cushion grooves, and the plurality of third main cushion grooves. A seat cushion for a chair that is spaced apart in the left and right directions from the second one placed in front of each cushion groove. In claim 1,
A seat cushion for a chair in which the plurality of main cushion grooves are formed as circular grooves. In claim 1,
A seat cushion for a chair in which the plurality of main cushion grooves are formed as polygonal grooves. In claim 1,
An insertion groove is formed on the lower surface of the seat cushion into which the upper part of the seat plate supporting the seat cushion is inserted,
A border groove is formed on the upper edge of the insertion groove into which the border protrusion formed on the upper upper surface edge of the seat plate is inserted,
A seat cushion for a chair, wherein the plurality of cushion grooves are formed inside the edge groove of the upper surface of the insertion groove.

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