Chair

Abstract

The present invention relates to a chair having a seat plate that can be moved with minimal force. The chair of the present invention comprises a seat plate fixedly coupled, a seat plate movably coupled to the seat plate, a lever member arranged so that at least a portion thereof is exposed to the outside of the seat plate and elastically rotatably coupled to the seat plate, and a lever bracket connected to the lever member, movably coupled to the seat plate, and arranged so as to be detachably coupled to the seat plate.

Description

Technology Field

[0001] The present invention relates to a chair, and more specifically, to a chair equipped with a seat that can be moved with little force. Background Technology

[0002] Generally, chairs are a type of furniture on which users sit, and they have been available in a wide variety of forms, ranging from simple shapes to complex designs equipped with numerous functions. In particular, the seat, which comes into direct contact with and supports the user, has been provided with various features implemented to enhance user convenience.

[0003] For example, the seat portion was designed to be movable relative to the base or backrest. This allowed users to customize the chair to fit their body type, helping them maintain proper posture while seated.

[0004] Meanwhile, as the seat portion was designed to be movable, the overall structure of the chair became unstable, leading to a problem where users could not sit down stably. Additionally, due to the complex structure, users who were unskilled at operation found it difficult to move the seat portion, resulting in an inability to use this function efficiently. The problem to be solved

[0005] The present invention aims to solve the aforementioned problems by providing a chair equipped with a movable seat plate with a simple and sturdy structure, so that a user can sit stably.

[0006] In addition, the present invention aims to provide a chair equipped with a movable seat through simple operation, so that various users can move the seat to a desired position. means of solving the problem

[0007] The chair of the present invention includes a seat unit on which a user rests and a frame unit that supports the seat unit.

[0008] The seat unit comprises a seat plate fixedly coupled to the frame unit, a seat plate movably coupled to the seat plate, a lever member disposed such that at least a portion is exposed to the outside of the seat plate and elastically rotatably coupled to the seat plate, and a lever bracket connected to the lever member and movably coupled to the seat plate and disposed to be detachably coupled to the seat plate.

[0009] The lever member is rotated by an external force applied to the lever member, and the lever bracket is moved so that the lever bracket and the seat plate are separated, and the seat plate can be positioned in a movable state relative to the seat plate.

[0010] Additionally, the seat unit may further include a lever elastic member disposed between the seat plate and the lever member, a lever coupling member coupled to the seat plate to rotatably fix at least a portion of the lever member to the seat plate, and a bracket coupling member coupled to the seat plate that covers at least a portion of the lever bracket to movably fix at least a portion of the lever bracket to the seat plate.

[0011] Additionally, the lever member may include a lever connecting part provided at one end and connected to the lever bracket, a lever hook part provided at the other end and engaged with the seat plate, a lever elastic part located adjacent to the lever hook part than the lever connecting part and having the lever elastic member disposed therein, and a lever rotating part located adjacent to the lever connecting part than the lever hook part and being rotatably fixed to the seat plate by the lever coupling member.

[0012] Additionally, the lever bracket may include a bracket coupling part provided at one end and configured with an uneven structure capable of being coupled with the seat plate, a bracket connecting part provided at the other end and connected to the lever connecting part, and a bracket moving part positioned between the bracket coupling part and the bracket connecting part, at least a portion of which is covered by the bracket coupling member and placed in close contact with the seat plate.

[0013] Additionally, the bracket connecting portion includes a bracket groove that is extended vertically so that the lever connecting portion can be inserted so as to be movable in the vertical direction, and the lever member rotates around the lever rotating portion by an external force applied to the lever member, and the lever projection moves downward in the bracket groove while the lever bracket moves toward the lever member, and the bracket connecting portion is separated from the seat plate, and the seat plate can be positioned so as to be slidable in the front-rear direction relative to the seat plate.

[0014] Additionally, it may include an outer surface of a seat plate formed with a predetermined curvature to form at least a portion of the exterior, a lever exposure portion formed by opening at least a portion of the outer surface of the seat plate so as to allow access to the lever member from the outside, and a lever installation portion formed opposite to the lever exposure portion and on which the lever elastic member is disposed.

[0015] Additionally, the lever member may include a first lever curved surface portion formed with a curvature corresponding to the curvature of the outer surface of the seat plate, extending from the lever hook portion; a second lever curved surface portion that is bent and extended from the first lever curved surface portion, is provided with the lever elastic portion and is connected to the lever installation portion by the lever elastic portion, and is spaced apart from the lever exposure portion to form a lever pressing space; and a third lever curved surface portion extending from the second lever curved surface portion to the lever connection portion. Effects of the invention

[0016] The chair of the present invention has the advantage of enhancing user convenience by providing a seat that is movable by simple operation by the user. In particular, by moving the seat to a position desired by the user, it is possible to create a shape that fits the user's body type and induce a correct posture.

[0017] In addition, it features a movable seat with a simple and sturdy structure that ensures the overall stability of the chair, allowing the user to sit stably and offering the advantage of being usable for a relatively long period. Brief explanation of the drawing

[0018] FIG. 1 is a drawing illustrating a chair according to one embodiment of the present invention. FIG. 2 is a drawing illustrating a seat unit of a chair according to one embodiment of the present invention. FIG. 3 is a drawing showing a part of a seat unit of a chair according to one embodiment of the present invention. FIG. 4 is a drawing illustrating a lever member of a chair according to an embodiment of the present invention. FIG. 5 is a drawing illustrating a lever bracket of a chair according to one embodiment of the present invention. FIGS. 6 and FIGS. 7 are cross-sectional drawings of a seat unit of a chair according to an embodiment of the present invention. FIG. 8 is a drawing illustrating part A of FIG. 2. FIG. 9 is a drawing illustrating a washer member of a chair according to one embodiment of the present invention. FIG. 10 is a cross-sectional view of a seat unit of a chair according to one embodiment of the present invention. Specific details for implementing the invention

[0019] Specific embodiments of the present invention will be described in detail below with reference to the drawings. However, the concept of the present invention is not limited to the presented embodiments. Those skilled in the art who understand the concept of the present invention may easily propose other inventions that are inferior or other embodiments included within the scope of the concept of the present invention by adding, changing, or deleting other components within the same scope of the concept, and such are also to be considered to be included within the scope of the concept of the present invention.

[0020] Specific embodiments of the present invention will be described in detail below with reference to the drawings.

[0021] FIG. 1 is a drawing illustrating a chair (1) according to one embodiment of the present invention.

[0022] As illustrated in FIG. 1, the chair (1) of the present invention includes a seat unit (10) on which a user sits and a frame unit (20) that supports the seat unit (10). Additionally, the chair (1) may further include an armrest unit (30), a backrest unit (40), and a base unit (50) that are coupled to the frame unit (20).

[0023] At this time, each component is distinguished for convenience and is not limited thereto. For example, the frame unit (20) is a component that stably supports the chair (1) and can stably support the seat unit (10) on the floor surface by including the base unit (50). At this time, the base unit (50) refers to a component located at the bottom of the seat unit (10), and the vertical direction corresponds to the vertical direction in the drawing.

[0024] Additionally, one direction that is vertical and horizontal to the floor surface is classified as the front-rear direction. At this time, the seat unit (10) may include a seat plate (100, FIG. 2) that is movable in the front-rear direction. For example, the front-rear direction may include a front direction in which the seat unit (10) moves horizontally to the floor surface in a direction away from the backrest unit (40) in FIG. 1, and a rear direction in which the seat unit (10) moves horizontally to the floor surface in a direction closer to the backrest unit (40).

[0025] In addition, among the directions perpendicular to the up-and-down direction and horizontal to the floor surface, one direction perpendicular to the front-and-back direction is distinguished as the left-and-right direction. Referring to FIG. 1, a pair of armrest units (30) are arranged on both sides of the left-and-right direction of the seat unit (10). For example, the left-and-right direction can be distinguished as the right direction and the left direction based on the user seated on the seat unit (10).

[0026] Hereinafter, regardless of the direction depicted in each drawing, the up-down, front-back, and left-right directions are distinguished as previously defined.

[0027] FIG. 2 is a drawing illustrating a seat unit (10) of a chair according to an embodiment of the present invention. FIG. 1 illustrates the upper surface of the seat unit (10) that comes into contact with the user, and FIG. 2 illustrates the lower surface of the seat unit (10) that is opposite to the upper surface.

[0028] As illustrated in FIG. 2, the seat unit (10) includes a seat plate (110) fixedly coupled to the frame unit (20) and a seat plate (100) movably coupled to the seat plate (110). That is, the seat plate (110) corresponds to a part fixed at a predetermined position, and the seat plate (100) can be understood as a part that is relatively movable.

[0029] The above seat plate (100) may be divided into a seat plate seat portion (102) positioned at the top and a seat plate frame portion (104) positioned at the bottom. The seat plate seat portion (102) and the seat plate frame portion (104) may be made of different materials. For example, the seat plate seat portion (102) may be made of a material capable of elastic deformation for the convenience of the user, and the seat plate frame portion (104) may be made of a material having rigidity for structural stability.

[0030] The seat frame portion (104) may include an outer seat surface (106) forming the exterior and a seat guide groove (108) recessed upward from the outer seat surface (106). The outer seat surface (106) may be provided with a predetermined curvature as a portion exposed to the outside. The seat plate (110) may be seated in the seat guide groove (108).

[0031] Additionally, the seat unit (10) further includes a lever member (120) and a lever bracket (130, FIG. 3). The lever member (120) and the lever bracket (130) represent a configuration that allows the seat plate (100) to be positioned in a movable state as a user applies an external force. Specifically, the lever member (120) and the lever bracket (130) may move due to the external force applied to the lever member (120), thereby allowing the seat plate (100) to be positioned in a movable state relative to the seat plate plate (110).

[0032] Below, the lever member (120) and the lever bracket (130) are described in detail.

[0033] FIG. 3 is a drawing illustrating a part of the seat unit (10) of a chair (1) according to an embodiment of the present invention. FIG. 3 illustrates a part of the seat unit (10) in which the lever member (120) and the lever bracket (130) are installed. More specifically, it illustrates the inner part of the seat frame part (104) opposite to the outer side surface (106) of the seat shown in FIG. 2. This part is not exposed to the outside depending on the assembly, and can be provided with various structures to supplement rigidity and reduce material.

[0034] FIG. 4 is a drawing illustrating a lever member (120) of a chair (1) according to an embodiment of the present invention, and FIG. 5 is a drawing illustrating a lever bracket (130) of a chair (1) according to an embodiment of the present invention. FIG. 6 and FIG. 7 are drawings illustrating a cross-section of a seat unit (10) of a chair (1) according to an embodiment of the present invention. FIG. 6 and FIG. 7 illustrate a partial cross-section of the seat unit (10) in which the lever member (120) and the lever bracket (130) are installed.

[0035] As illustrated in FIGS. 3 to 7, the lever member (120) and the lever bracket (130) can be movably coupled to the seat plate (100). The seat unit (10) may further include a lever elastic member (140), a lever coupling member (150) and a bracket coupling member (160) that movably fix the lever member (120) and the lever bracket (130) to the seat plate (100).

[0036] As shown in FIG. 2, the lever member (120) is positioned so that at least a portion is exposed to the outside of the seat plate (100) and is elastically rotatably coupled to the seat plate (100). The lever member (120) may include a lever connecting portion (1200), a lever hook portion (1210), a lever elastic portion (1220), and a lever rotating portion (1230). Hereinafter, the lever member (120) will be described in detail with reference to FIG. 4.

[0037] The lever connecting portion (1200) corresponds to a portion provided at one end of the lever member (120). Additionally, the lever connecting portion (1200) corresponds to a portion connected to the lever bracket (130). For example, the lever connecting portion (1200) may be provided in the form of a pair of protrusions spaced apart from each other and protruding toward each other.

[0038] The lever hook portion (1210) corresponds to a part provided at the other end of the lever member (120). Additionally, the lever hook portion (1210) corresponds to a part that is hooked and coupled to the seat plate (100). That is, one end of the lever member (120) is connected to the lever bracket (130), and the other end can be hooked and coupled to the seat plate (100). For example, the lever hook portion (1210) may be provided in a shape that is bent outward.

[0039] The lever elastic portion (1220) is located closer to the lever hook portion (1210) than to the lever connecting portion (1200) and corresponds to the portion where the lever elastic member (140) is placed. Specifically, one end of the lever elastic member (140) may be placed on the lever elastic portion (1220). For example, the lever elastic portion (1220) may be provided in a protruding shape so that one end of the lever elastic member (140) is fitted and coupled.

[0040] The lever rotation part (1230) is located closer to the lever connection part (1200) than the lever hook part (1210) and corresponds to a part that is rotatably fixed to the seat plate (100) by the lever coupling member (150). For example, the lever rotation part (1230) may be provided in the form of a pair of protrusions that are spaced apart from each other and protrude in directions away from each other.

[0041] At this time, if a pair of lever rotation parts (1230) protrude outwardly away from each other, the previously described pair of lever connection parts (1200) may protrude inwardly toward each other. The protrusion direction of the lever rotation parts (1230) and the lever connection parts (1200) may correspond to the front-rear direction.

[0042] Referring to FIG. 3, it can be seen that the lever rotation part (1230) is fitted onto the seat plate (100), and the lever coupling member (150) is coupled to the upper part of the lever rotation part (1230). That is, the lever coupling member (150) can be coupled to the seat plate (100) so as to rotatably fix at least a part of the lever member (120) to the seat plate (100). Accordingly, the lever rotation part (1230) can be fixed at a predetermined position on the seat plate (100) and positioned so as to be rotatable at a predetermined angle.

[0043] Referring to FIGS. 6 and 7, the lever member (120) may have the lever hook portion (1210), the lever elastic portion (1220), the lever rotation portion (1230), and the lever connection portion (1200) arranged in order. However, this is based on the left-right direction, and each component may be arranged in the front-rear direction. For example, the lever hook portion (1210) may be extended in the front-rear direction, the lever elastic portion (1200) may be located at the center in the front-rear direction of the lever hook portion (1210), and the lever rotation portion (1230) may be formed protruding from the lever hook portion (1210) in the front-rear direction.

[0044] Additionally, the lever member (120) may include a first lever curved surface portion (1240), a second lever curved surface portion (1250), and a third lever curved surface portion (1250).

[0045] The first lever curved surface portion (1240) is a portion that extends from the lever hook portion (1210) and is formed with a curvature corresponding to the curvature of the outer surface of the seat plate (106). As shown in FIG. 2, a portion of the lever member (120) is exposed to the outside, and the first lever curved surface portion (1240) corresponds to the portion exposed to the outside. As shown in FIG. 6 and FIG. 7, the first lever curved surface portion (1240) forms a smooth exterior together with the outer surface of the seat plate (106), thereby preventing the movement of the lever member (130) due to unintended external forces.

[0046] The second lever curved surface portion (1250) corresponds to a portion that is bent and extended from the first lever curved surface portion (1240). More specifically, the second lever curved surface portion (1250) may be bent upward from the outer surface of the seat plate (106) to form a lever pressing space (1000). The lever pressing space (1000) refers to a space where a user inserts a finger to apply external force to the lever member (120).

[0047] Additionally, the second lever curved surface portion (1250) corresponds to the portion where the lever elastic portion (1220) is provided. For example, the lever elastic portion (1220) may be formed by protruding upward from the opposite surface of the second lever curved surface portion (1250) that forms the lever pressing space (1000). Accordingly, when a user applies an external force through the lever pressing space (1000), it is immediately transmitted to the lever elastic member (140), allowing for elastic deformation with less force.

[0048] The third lever curved surface portion (1260) corresponds to the portion extending from the second lever curved surface portion (1250) to the lever connection portion (1200). The third lever curved surface portion (1260) may be bent downward from the second lever curved surface portion (1250) and extended. Additionally, the first lever curved surface portion (1240) and the second lever curved surface portion (1250) may be provided in a plate shape extending in the front-rear direction, and the third lever curved surface portion (1260) may be provided in a pair of protrusion shapes spaced apart in the front-rear direction.

[0049] The lever bracket (130) is connected to the lever member (120) and movably coupled to the seat plate (100), and is disposed to be detachably coupled to the seat plate plate (110). The lever bracket (130) may include a bracket coupling part (1300), a bracket connecting part (1310), and a bracket moving part (1320). Hereinafter, the lever bracket (130) will be described in detail with reference to FIG. 5.

[0050] The bracket coupling portion (1300) is provided at one end of the lever bracket (130) and corresponds to a part that is coupled with the seat plate (110). For example, the bracket coupling portion (1300) may be provided with an uneven structure. Referring to FIG. 5, it may be provided in a shape in which three protrusions are spaced apart from each other.

[0051] Referring to FIG. 2, the seat plate (110) may include an uneven structure (1118) corresponding to the bracket coupling part (1300) so as to be coupled thereto. In this case, the uneven structure (1118) of the seat plate (110) may be extended longer in the front-rear direction than the bracket coupling part (1300) and may include a greater number of protrusions. Accordingly, the bracket coupling part (1300) may be moved in the front-rear direction to be coupled with the uneven structure (1118).

[0052] The bracket connecting portion (1310) is provided at the other end of the lever bracket (130) and corresponds to the part connected to the lever connecting portion (1200). That is, one end of the lever bracket (130) is connected to the seat plate (110), and the other end can be connected to the lever member (120). For example, the bracket connecting portion (1310) may be provided in a form having a bracket groove (1330) that is extended vertically.

[0053] As previously described, the bracket groove (1330) may be formed by being recessed in both directions so that a pair of lever connecting parts (1200) protruding toward each other can be inserted. Referring to FIG. 3, the bracket connecting part (1310) is positioned between the pair of lever connecting parts (1200) so that the pair of lever connecting parts (1200) can be inserted from both sides.

[0054] Additionally, the bracket groove (1330) can guide the up and down movement of the lever connection part (1200). That is, the lever connection part (1200) can be inserted into the bracket groove (1330) and moved up and down along the bracket groove (1330).

[0055] The bracket moving part (1320) corresponds to a portion located between the bracket coupling part (1300) and the bracket connecting part (1310). Additionally, at least a portion of the bracket moving part (1320) may be covered by the bracket coupling member (160) and positioned in close contact with the seat plate (100). For example, the bracket moving part (1320) may be provided with a structure that forms a step in the vertical direction.

[0056] Referring to FIG. 3, it can be seen that the bracket coupling member (160) is coupled by covering a part of the bracket moving part (1320). That is, the bracket coupling member (160) can be coupled to the seat plate (100) by covering at least a part of the lever bracket (130) to guide the movement of the lever bracket (130) in one direction. The forward and backward movement of the lever bracket (130) is fixed by the bracket coupling member (160), and it can be moved in the left and right directions.

[0057] The above seat plate (100) may include a lever exposure portion (1002) formed by opening at least a portion of the outer surface (106) of the seat plate so as to allow access to the lever member (120) from the outside, and a lever installation portion (1004) formed opposite to the lever exposure portion (1002) and having the lever elastic member (140) disposed therein.

[0058] Referring to FIG. 3, it can be seen that the lever installation portion (1004) is formed facing the lever exposure portion (1002) closed by the lever member (120). Additionally, the lower end of the lever elastic member (140) may be fixed to the lever elastic portion (1220), and the upper end may be fixed to the lever installation portion (1004). A projection corresponding to the lever elastic portion (1220) may be formed on the lever installation portion (1004).

[0059] Hereinafter, with reference to FIGS. 6 and FIGS. 7, the operation caused by an external force applied to the lever member (120) is summarized. FIG. 6 shows that when no external force is applied, the lever member (120) closes the lever outlet (1002), and the first lever curved surface (1240) forms a smooth curved surface appearance together with the outer surface of the seat plate (106). The lever hook portion (1210) is positioned in a state where it is hooked in contact with the seat plate (100).

[0060] Additionally, the lever pressing space (1000) is provided by the second lever curved surface (1240) and is positioned so that a user can easily apply external force as needed. The lever elastic member (140) is positioned between the seat plate (100) and the lever member (140) in a state where it is not elastically deformed.

[0061] FIG. 7 illustrates a state in which each component is moved when an external force is applied to the lever member (120). The user can easily apply an external force by inserting their hand into the lever pressing space (1000) and pressing upward while seated on the seat unit (10). In this way, the lever member (120) can rotate around the lever rotation part (1230) by the external force applied to the lever member (120). Specifically, the lever connecting part (1210) and the lever elastic part (1220) are moved upward around the lever rotation part (1230), and the lever connecting part (1200) is moved downward. Accordingly, the lever connecting part (1210) is separated from the seat plate (100), the lever exposure part (1002) is opened, and the lever elastic member (140) can be elastically deformed.

[0062] Additionally, the lever connecting part (1210) is moved downward from the bracket groove (1330). At this time, since the lever connecting part (1210) is rotated around the lever rotating part (1230), it moves downward and left and right. Accordingly, the lever connecting part (1210) moves downward along the bracket groove (1330) and simultaneously pulls the lever bracket (130) to move it horizontally.

[0063] Comparing FIGS. 6 and FIGS. 7, as the lever member (120) rotates clockwise around the lever rotation part (1230), the lever bracket (130) moves horizontally toward the lever member (120). For example, the lever rotation part (1230) may be positioned to rotate approximately 20 degrees, and the lever bracket (130) may be positioned to move approximately 6 mm. Such numerical values ​​or ranges may vary depending on the design.

[0064] As the lever bracket (130) moves toward the lever member (120), the bracket coupling part (1300) is separated from the seat plate (110), and the seat plate (100) can be positioned in a state where it can slide forward and backward relative to the seat plate (110). Additionally, when an external force is removed from the lever member (120), each component can be returned to the state shown in FIG. 7 through FIG. 6 by the elastic restoring force of the lever elastic member (140).

[0065] That is, the user can move the seat plate (100) while applying an external force to the lever member (120), and when the external force applied to the lever member (120) is removed at a desired position, the seat plate (100) can be fixed at that position.

[0066] FIG. 8 is a drawing showing part A of FIG. 2, and FIG. 9 is a drawing showing a washer member (200) of a chair (1) according to an embodiment of the present invention. FIG. 10 is a drawing showing a cross-section of a seat unit (10) of a chair (1) according to an embodiment of the present invention.

[0067] As illustrated in FIGS. 8 to 10, the seat unit (10) further includes a plurality of washer members (200). The plurality of washer members (200) are arranged facing the seat plate (100) in the vertical direction with the seat plate (110) in between. That is, the seat plate (100), the seat plate (110), and the washer members (200) can be arranged in the vertical direction.

[0068] Additionally, the seat unit (10) may include a plurality of washer coupling members (210) that penetrate the seat plate (110) and are coupled to each washer member (200) and the seat plate (100). That is, each washer member (200) is coupled to the seat plate (100) by the washer coupling member (210) and can move in the forward and backward direction together with the seat plate (100).

[0069] A plurality of washer members (200) are all provided with the same shape, and one washer member (200) is described in detail with reference to FIG. 9. The washer member (200) is provided in the shape of a box with a cuboid overall and can be described by dividing it into six faces. Specifically, the washer member (200) may include an inner washer surface (2000), a pair of washer side surfaces (2010), a pair of washer front and rear surfaces (2020), and an outer washer surface (2030).

[0070] The inner surface of the washer (2000) refers to the surface facing the seat plate (110). Therefore, as shown in FIG. 8, when the washer member (200) is joined by the washer coupling member (210), it corresponds to a part that is not exposed to the outside. The inner surface of the washer (2000) may be provided as an approximately horizontal plane.

[0071] At this time, as illustrated in FIG. 10, the inner surface of the washer (2000) is spaced apart from the seat plate (110). That is, the inner surface of the washer (2000) does not come into contact with the seat plate (110), and a gap is created between them. Accordingly, regardless of the fastening strength of the washer coupling member (210), the washer member (200) and the seat plate (100) can be moved with the same external force relative to the seat plate (110).

[0072] The pair of washer side portions (2010) correspond to two sides spaced apart in the left-right direction, and the pair of washer front-rear portions (2020) correspond to two sides spaced apart in the front-rear direction. Additionally, the pair of washer front-rear portions (2020) correspond to surfaces that connect the pair of washer side portions (2010). In other words, the pair of washer side portions (2010) connect the pair of washer front-rear portions (2020). That is, the pair of washer front-rear portions (2020) and the pair of washer side portions (2010) can form a square side.

[0073] At this time, the pair of washer front and rear sections (2020) may be provided as flat plates extended in the left-right direction, and the pair of washer side sections (2010) may be provided as flat plates extended spaced apart in the front-rear direction. That is, the pair of washer front and rear sections (2020) may each be provided as a single flat plate, and the pair of washer side sections (2010) may each be provided as a plurality of flat plates spaced apart from each other.

[0074] Specifically, one washer side portion (2010) may include a central side portion (2012) and a pair of elastic side portions (2014) spaced apart from the central side portion (2012) in the front-rear direction. That is, one washer side portion (2010) may be provided with three flat plates arranged sequentially spaced apart in the front-rear direction.

[0075] The outer surface of the washer (2030) corresponds to a surface that is exposed to the outside as a surface facing the inner surface of the washer (2000). Referring to FIG. 8, the outer surface of the washer (2030) may be positioned so as to be exposed to the outside together with the seat plate (110). Unlike the inner surface of the washer (2000), which is provided as a horizontal plane, the outer surface of the washer (2030) may be provided as an uneven structure.

[0076] Additionally, the washer member (200) may include a washer coupling hole (2040) formed by penetrating the center of the washer inner surface (2000) and the washer outer surface (2030) so that the washer coupling member (210) is positioned therein. The washer outer surface (2030) may include a washer circular protrusion (2032) formed at the edge of the washer coupling hole (2040) so that the washer coupling member (210) is coupled thereto.

[0077] Additionally, the washer outer surface portion (2030) may include a pair of washer front-rear connecting portions (2034) extended in the front-rear direction to connect the washer circular protrusion (2032) and the pair of front-rear surface portions (2020) respectively, and a pair of washer side connecting portions (2036) extended in the left-right direction to connect the washer circular protrusion (2032) and the center side portion (2012) of the pair of washer side portions (2010) respectively.

[0078] Accordingly, the outer surface of the washer (2030) may be provided with an uneven structure having a circular protruding part in the center and protruding parts extending outward from the circle. In addition, through such a structure, the washer member (200) can be provided more firmly so that deformation can be prevented.

[0079] At this time, the elastic side portion (2014) is arranged in a state where it can be elastically deformed without being connected to other components. Specifically, the elastic side portion (2014) is arranged to be elastically deformable in the left and right directions and can be arranged in close contact with the seat plate (110). That is, the gap between the washer member (200) and the seat plate (110) is improved, thereby enabling a more stable structure.

[0080] The seat plate (110) may include a washer guide groove (1100) on which the plurality of washer members (200) are seated. Referring to FIG. 2, the seat plate (110) may be provided in a roughly rectangular flat plate shape. The seat plate (110) may be seated in a seat guide groove (108) that is recessed upward from the outer surface (106) of the seat plate. More specifically, the seat guide groove (108) may be extended in the front-rear direction so that the seat plate (110) can move relative to the seat guide groove (108) while in close contact with the seat guide groove (108).

[0081] The washer guide groove (1100) may be formed to extend long in the front-rear direction. For example, the washer guide groove (1100) may extend long from one end of the seat plate (110) to the other end. Additionally, the washer guide groove (1100) may be provided in multiple units spaced apart from each other. For example, the washer guide groove (1100) may be provided as a pair spaced apart in the left-right direction.

[0082] Additionally, the plurality of washer members (200) are spaced apart in the front-rear direction in each washer guide groove (1100) and may be movable in the front-rear direction along the washer guide groove (1100). FIG. 2 illustrates a case in which two washer members (200) are spaced apart from each other in the front-rear direction in one washer guide groove (1100), so that a total of four washer members (200) are provided.

[0083] Each washer member (200) is seated in the washer guide groove (1110) with the same shape, and a part of the washer guide groove (1110) in which one washer member (200) is placed is described in detail below.

[0084] Referring to FIGS. 8 and 10, the washer guide groove (1110) may include a washer guide bottom surface (1104) in which a washer member coupling hole (1102) through which the washer coupling member (210) is disposed is formed, and a washer guide side surface (1106) that is bent and extended from the washer guide bottom surface (1104). The washer member coupling hole (1102) may be provided as an elongated groove extended in the front-rear direction.

[0085] At this time, the washer member (200) may be placed in the washer guide groove (1110) so as to be in contact with the washer guide side (1106) and spaced apart from the washer guide bottom (1104). Additionally, the washer guide side (1106) may be provided as a pair that are each bent and extended from both ends of the washer guide bottom (1104).

[0086] That is, the inner surface of the washer (2000) is spaced apart and faces the lower surface of the washer guide (1104), and the pair of washer side surfaces (2010) can be positioned in contact with the washer guide side surface (1106) respectively. In particular, the elastic side surface (2014) is provided to be elastically deformable and can be positioned in close contact with the washer guide side surface (1106).

[0087] Referring to FIG. 10, the seat plate (100) may include a seat plate surface (1080) facing the seat plate plate (110). The seat plate surface (1080) may correspond to a part of the seat plate guide groove (108) described above.

[0088] Additionally, the seat plate (100) may include a seat plate washer coupling part (1082) that protrudes toward the seat plate plate (110) by penetrating the washer member coupling hole (1102) on the lower surface of the seat plate (1080) and into which the washer coupling member (210) is inserted and coupled. As previously described, the seat plate (100), the seat plate plate (110), and the washer member (200) may be arranged in sequence overall. At this time, the seat plate washer coupling part (1082), which corresponds to a part of the seat plate (100), may penetrate the seat plate plate (110) and come into contact with the washer member (200).

[0089] Additionally, the washer inner surface portion (2000) may include a washer circular recess (2002) formed at the edge of the washer coupling hole (2040) so that the protruding end of the seat plate washer coupling portion (1082) is seated thereon. As the seat plate washer coupling portion (1082) is seated in the washer circular recess (2002), the washer inner surface portion (2000) may be spaced apart from the washer guide surface (1104).

[0090] Additionally, the washer guide groove (1110) may further include a washer guide upper surface (1108) which is positioned opposite the washer guide lower surface (1104) and facing the seat plate lower surface (1080), and in which the washer member coupling hole (1102) is formed. That is, the washer guide lower surface (1104) and the washer guide upper surface (1108) are surfaces facing each other, and the washer member coupling hole (1102) may be formed by penetrating the washer guide lower surface (1104) and the washer guide upper surface (1108).

[0091] Additionally, the seat plate (100) may include a plurality of seat plate lower surface protrusions (1084) that are positioned adjacent to the seat plate washer coupling portion (1082) and protrude from the seat plate lower surface (1080) toward the washer guide upper surface (1108). The seat plate lower surface (1080) and the washer guide upper surface (1108) may be spaced apart from each other by the plurality of seat plate lower surface protrusions (1084).

[0092] That is, the lower surface of the seat plate (1080) and the upper surface of the washer guide (1108) are not in surface contact over a relatively large area, and the lower surface projection (1084) of the seat plate and the upper surface of the washer guide (1108) can be in point contact over a relatively small area. Accordingly, the seat plate (100) and the seat plate plate (110) can reduce the contact area with each other to reduce friction during relative movement, and the user can move the seat plate (100) with less force.

[0093] Although an embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and it will be obvious to those skilled in the art that various modifications and variations are possible within the scope of the technical concept of the present invention as described in the claims. Explanation of the symbols

[0094] 1: Chair 10: Seat unit 100: Stall 110: Seat plate 120: Lever member 130: Lever bracket

Claims

Claim 1 The system includes a seat unit on which a user is seated and a frame unit supporting the seat unit, wherein the seat unit comprises: a seat plate fixedly coupled to the frame unit; a seat plate movably coupled to the seat plate; a lever member positioned such that at least a portion thereof is exposed to the outside of the seat plate and is elastically rotatably coupled to the seat plate; a lever bracket connected to the lever member and movably coupled to the seat plate and positioned to be detachably coupled to the seat plate; a lever elastic member positioned between the seat plate and the lever member; and a lever coupling member coupled to the seat plate to rotatably fix at least a portion thereof of the lever member to the seat plate. A chair comprising: a bracket coupling member that covers at least a portion of the lever bracket and is coupled to the seat plate to movably fix at least a portion of the lever bracket to the seat plate; wherein the lever member rotates by an external force applied to the lever member, the lever bracket moves to separate the lever bracket from the seat plate, and the seat plate is positioned in a movable state relative to the seat plate. Claim 2 delete Claim 3 A chair according to claim 1, wherein the lever member comprises: a lever connecting part provided at one end and connected to the lever bracket; a lever hook part provided at the other end and engaged with the seat plate; a lever elastic part positioned closer to the lever hook part than the lever connecting part and having the lever elastic member disposed therein; and a lever rotating part positioned closer to the lever connecting part than the lever hook part and rotatably fixed to the seat plate by the lever coupling member. Claim 4 A chair according to paragraph 3, wherein the lever bracket comprises: a bracket coupling part provided at one end and formed with an uneven structure capable of being coupled with the seat plate; a bracket connecting part provided at the other end and connected to the lever connecting part; and a bracket moving part positioned between the bracket coupling part and the bracket connecting part, at least a portion of which is covered by the bracket coupling member and placed in close contact with the seat plate. Claim 5 In claim 4, the bracket connecting portion includes a bracket groove that is extended vertically so that the lever connecting portion can be inserted so as to be movable in the vertical direction, and the lever member rotates around the lever rotating portion by an external force applied to the lever member, and the lever connecting portion moves downward in the bracket groove while the lever bracket moves toward the lever member, and the bracket coupling portion is separated from the seat plate, and the seat plate is positioned so as to be slidable in the front-rear direction relative to the seat plate. Claim 6 In claim 5, the seat plate comprises: an outer surface of the seat plate formed with a predetermined curvature to form at least a portion of the exterior; a lever exposure portion formed by opening at least a portion of the outer surface of the seat plate so as to allow access to the lever member from the outside; and a lever installation portion formed opposite to the lever exposure portion and having the lever elastic member disposed therein, wherein the lever member comprises: a first lever curved surface portion formed with a curvature corresponding to the curvature of the outer surface of the seat plate, extending from the lever hook portion; a second lever curved surface portion bent and extended from the first lever curved surface portion, having the lever elastic portion provided therein and connected to the lever installation portion by the lever elastic member, and spaced apart from the lever exposure portion to form a lever pressing space; and a third lever curved surface portion extending from the second lever curved surface portion to the lever connection portion.

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