chair

Abstract

To provide a chair capable of securing flexibility of a seat body arranged in an upper position, even when an arm rest is attached to a seat retaining member.SOLUTION: A chair 1 includes: a support structure that includes a leg and a support base 3 installed at an upper end of the leg; a seat retaining member 5 that is supported by the support structure and that has an arm rest attachment part 30B; an arm rest 8 that is attached to the arm rest attachment part 30B; and a seat body 4 that is supported by the seat retaining member 5 and that covers an upper part of the arm rest attachment part 30B. A vertical space 100, which allows downward displacement of the seat body 4, is formed between the seat body 4 and the arm rest attachment part 30B.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a chair. [Background technology]

[0002] Patent Document 1 below discloses a chair that has armrest attachment parts (armrest attachment parts) for attaching armrests to opposing left and right sides of a seat support (seat support member) that supports the seat (seat body). The armrest attachment parts have a recess, and the armrest has a protrusion that can be inserted and removed from the recess. The armrest is fixed to the armrest attachment parts with bolt members, with the recess and protrusion engaged. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 4726338 Summary of the Invention [Problem to be solved by the invention]

[0004] The chair described above has an advantage in that the armrest attachments are provided on the seat support member, which is a strength member, allowing the armrests to be firmly fixed. However, the upper part of the armrest attachments on the seat support member is covered by the seat body, and the armrest attachments, which are strength members, abut the underside of the seat body, preventing the seat body from flexibly deforming in response to the seating load. Furthermore, when a seating load is applied to the seat body, the occupant may feel discomfort when touching the armrest attachments and the shape of the armrests through the seat body.

[0005] The present invention has been made in consideration of the above circumstances, and aims to provide a chair that can ensure the flexibility of the seat body located above, even when armrests are attached to the seat support member. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention employs the following aspects. A chair according to one aspect of the present invention comprises a support structure including legs and bases installed at the upper ends of the legs, a seat support member supported by the support structure and having armrest mounting portions, armrests attached to the armrest mounting portions, and a seat body supported by the seat support member and covering the upper part of the armrest mounting portions, and a vertical space is formed between the seat body and the armrest mounting portions to allow downward displacement of the seat body.

[0007] According to this aspect, the armrest attachment portion is provided on the seat support member, which is a strength member that supports the seat body, so that the armrest can be firmly fixed, resulting in a robust structure. Furthermore, by fixing the armrest to the seat support member, the seat body can be made thin and flexible, providing flexibility that provides a comfortable fit for the seated person. Here, a vertical space is formed between the armrest attachment portions extending to the left and right of the seat support member and the seat body that covers the armrest attachment portions, allowing downward displacement of the seat body. Therefore, the armrest attachment portion does not impede the flexibility of the seat body, and the seated person does not feel the hardness of the armrest attachment portion.

[0008] In the chair according to the above aspect, the armrest attachment portion may be located outward of the support base of the support structure when viewed from above. According to this aspect, the armrest mounting portion is located outside the support base when viewed from above and below, so the support base does not interfere with the mounting of the armrest.

[0009] In the chair according to the above aspect, the armrest attachment portion may extend in the left-right direction of the seat support member. According to this aspect, the armrest attachment portion can be easily seen from the side, facilitating the armrest attachment work.

[0010] In the chair according to the above aspect, the space may expand in the up-down direction as it extends outward in the left-right direction. According to this aspect, the amount of downward deflection of the seat body increases the further outward in the left-right direction the seat body is moved, so that even for a large occupant or occupant with large buttocks, the seat body can be deflected significantly in the left-right direction to provide a comfortable fit.

[0011] In the chair of the above embodiment, the seat support member has a saucer shape that opens at the top in the vertical direction, and the opening is formed up to an armrest mounting portion arranged in the space, and may be provided with a shielding portion that shields the opening in the armrest mounting portion. According to this aspect, the shielding portion shields the opening of the armrest attachment portion, making the opening invisible from the space between the seat body and the armrest attachment portion, improving the appearance. Also, by arranging the shielding portion above the armrest attachment portion, the armrest attachment portion is covered by the shielding portion, and even if the seat body is displaced significantly downward, the armrest attachment portion will abut against the shielding portion before abutting against the armrest attachment portion, reducing the risk of damage to the seat body.

[0012] In the chair of the above aspect, a placement portion for placing the shielding portion may be provided on a peripheral edge of the opening in the armrest attachment portion. According to this aspect, the shielding portion can be stably placed on the peripheral edge of the opening of the armrest attachment portion.

[0013] In one aspect of the chair described above, a cover member may be provided having a through hole formed therein into which the armrest mounting portion is inserted, and the shielding portion may extend in a canopy-like manner from above the through hole in the cover member. According to this aspect, a through hole is formed into which the armrest mounting portion is inserted, and by extending the shielding portion in a canopy-like manner from the cover member positioned relative to the armrest mounting portion, it becomes easy to position the shielding portion relative to the opening of the armrest mounting portion.

[0014] In the chair according to the above aspect, the armrest may be fitted onto the armrest attachment portion extending from the through hole of the cover member. According to this aspect, the armrest is fitted from the outside with the cover member inserted into the armrest mounting portion, so that the cover member can be fixed to the seat support member without any fixing parts for the cover member, thereby improving assembly ease. [Effects of the Invention]

[0015] According to each of the above aspects, even when armrests are attached to the seat receiving member, it is possible to obtain a chair that can ensure the flexibility of the seat body arranged above. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view of a chair according to an embodiment, viewed from the front side. FIG. [Figure 2] 1 is a perspective view of a chair according to an embodiment, viewed from the rear side. FIG. [Figure 3] FIG. 2 is a plan view of an armrest mounting structure according to one embodiment. [Figure 4] 4 is a plan view of the armrest mounting structure shown in FIG. 3 with the cover member removed. [Figure 5] FIG. 4 is a cross-sectional view taken along the line VV in FIG. [Figure 6] FIG. 2 is a perspective view of a seat receiving member according to one embodiment, as viewed from the top side. [Figure 7] FIG. 2 is an exploded perspective view of a seat receiving member according to one embodiment, as viewed from the top side. [Figure 8] FIG. 4 is a right side view of the seat receiving member according to the embodiment. [Figure 9] FIG. 2 is a perspective view of a cover member according to one embodiment, viewed from the bottom side. [Figure 10] FIG. 2 is a perspective view of the armrest mounting structure according to one embodiment, viewed from the bottom side. [Figure 11] FIG. 10 is a cross-sectional view taken along the line XI-XI of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the present invention will be described below with reference to the drawings. In the following description, the direction indicated by the arrow FR in the drawing, which points to the front of a person seated in a chair in a normal posture, will be referred to as "front," and the opposite direction will be referred to as "rear." Furthermore, with regard to "up," "down," "left," and "right," the direction indicated by the arrow UP in the drawing above a person seated in a chair in a normal posture will be referred to as "up," and the opposite direction will be referred to as "down," and the direction indicated by the arrow LH in the drawing to the left of a person seated in a chair in a normal posture will be referred to as "left," and the opposite direction will be referred to as "right."

[0018] Fig. 1 is a perspective view of a chair 1 according to an embodiment as viewed from the front side, and Fig. 2 is a perspective view of the chair 1 according to an embodiment as viewed from the back side. As shown in these figures, chair 1 of this embodiment comprises legs 2 placed on the floor, a box-shaped support base 3 installed at the upper ends of legs 2, a seat body 4 on which an occupant sits, a seat support member 5 attached to the upper surface of support base 3 and supporting seat body 4, a backrest 6 that supports the back of an occupant seated on seat body 4, a backrest support member 7 that supports backrest 6 from behind, and armrests 8 that support the elbows of an occupant seated on seat body 4. Note that legs 2 and support base 3 form a support structure that supports seat support member 5.

[0019] The leg section 2 comprises a multi-leg 11 with casters 2a, and a pillar 12 that stands up from the center of the multi-leg 11 and has a built-in gas spring that serves as a lifting mechanism. A support base 3 is attached to the upper end of the pillar 12 so that it can rotate horizontally. A lifting adjustment mechanism (not shown) for the pillar 12 and a tilt adjustment mechanism (not shown) for the backrest support member 7 are built into the support base 3.

[0020] The seat body 4 comprises a seat body 20 and a seat plate 21 that supports the seat body 20. The seat plate 21 is a resin-molded plate-like member that forms the framework of the seat body 4. Although not shown in detail, the seat body 20 comprises a seat frame (not shown) that is attached to the outer periphery of the seat plate 21, a cushioning material (not shown) made of urethane or the like that is placed on the upper surface of the seat plate 21, and a seat covering material (not shown) that is stretched over the seat frame and covers the upper side of the cushioning material.

[0021] The backrest 6 has a curved shape that is convex backward in plan view, and comes into contact with the seated person and bears the weight. The backrest support member 7 is a strength member that supports the backrest 6 from behind at the center in the left-right direction. The backrest support member 7 has a roughly L-shape in side view, and the lower end of its front part is connected to the tilt adjustment mechanism inside the support base 3. Note that reference numeral 15 shown in Fig. 5, which will be described later, is a pivot shaft for the backrest support member 7 on the support base 3. Reference numeral 13 is an operating knob for the tilt adjustment mechanism that protrudes from the side of the support base 3. Reference numeral 14 shown in Figs. 1 and 2 is a slider that extends the front end of the seat body 4 forward when it is in the folded-out position.

[0022] The armrest 8 comprises an armrest 50 that rests against the elbow of the seated occupant, and an armrest rod 51 that supports the armrest 50. The armrest 50 extends in the front-to-rear direction and is tilted inward in the left-to-right direction. The armrest rod 51 is L-shaped, extending downward from the center of the armrest 50 in the front-to-rear direction and bending inward in the left-to-right direction, and is attached to the seat support member 5 via an outer fitting portion 52. The mounting structure of the armrest 8 will be described below with reference to FIGS.

[0023] FIG. 3 is a plan view of the mounting structure for the armrest 8 according to one embodiment. FIG. 4 is a plan view of the mounting structure for the armrest 8 with the cover member 9 shown in FIG. 3 removed. FIG. 5 is a cross-sectional view taken along arrows V-V in FIG. 3. FIG. 6 is a perspective view of the seat receiving member 5 according to one embodiment, viewed from the top side. FIG. 7 is an exploded perspective view of the seat receiving member 5 according to one embodiment, viewed from the top side. FIG. 8 is a right side view of the seat receiving member 5 according to one embodiment. FIG. 9 is a perspective view of the cover member 9 according to one embodiment, viewed from the bottom side. FIG. 10 is a perspective view of the mounting structure for the armrest 8 according to one embodiment, viewed from the bottom side. FIG. 11 is a cross-sectional view taken along arrows XI-XI in FIG. 3.

[0024] As shown in Figures 6 and 7, the seat support member 5 includes a main body 30A having a rectangular shape in a plan view and armrest attachment portions 30B extending outward in the left-right direction from left-right side portions 30A1 of the main body 30A. The seat support member 5 slides rearward together with the seat support 4 relative to the base 3 in response to the rearward tilt of the backrest support member 7 relative to the base 3. The seat support member 5 is a resilient member made of a metal material such as drawn sheet metal or aluminum die-cast, and has a saucer shape that is open at the top in the vertical direction. The seat support member 5 may also be molded from injection-molded synthetic resin, in which case it may have a shape other than a saucer shape that is open at the top in the vertical direction.

[0025] Specifically, the seat receiving member 5 has a bottom wall portion 31 and a side wall portion 32 that stands upright from the peripheral edge of the bottom wall portion 31. An outwardly extending flange 33 is provided at the upper end of the side wall portion 32. A fixing hole 30B1 is formed in the bottom wall portion 31 of the armrest mounting portion 30B of the seat receiving member 5. A nut member (not shown) is disposed directly above the fixing hole 30B1 so that the armrest 8 can be screwed in from below. From the perspective of ease of mounting the armrest 8, it is desirable that the armrest mounting portion 30B extend outward beyond the outer lateral edges of the support base 3 in a plan view.

[0026] As shown in Fig. 4, the armrest 8 has an outer fitting portion 52 that fits onto the armrest mounting portion 30B. The outer fitting portion 52 has a pair of first contact portions 52A that contact the outer surface of the armrest mounting portion 30B from both sides in the front-to-rear direction, and as shown in Fig. 10, a second contact portion 52B that contacts the outer surface of the armrest mounting portion 30B from below in the up-down direction.

[0027] The second contact portion 52B has a communication hole 53 that communicates with the fixing hole 30B1. The area around the communication hole 53 on the underside of the second contact portion 52B is recessed upward to prevent the fixing screw (not shown) from protruding from the underside of the second contact portion 52B. The outer fitting portion 52 has a shape in which the lower ends of the pair of first contact portions 52A are connected to each other in the front-rear direction via the second contact portion 52B.

[0028] That is, the outer fitting portion 52 is formed in a U-shape in the vertical cross section shown in Fig. 11 (a cross section including an axis extending in the front-rear direction and an axis extending in the up-down direction). The armrest attachment portion 30B disposed inside the outer fitting portion 52 is also formed in a U-shape in the vertical cross section. Therefore, as shown in Fig. 4, the outer fitting portion 52 and the armrest attachment portion 30B are open on the upper side in the vertical direction. The openings of the outer fitting portion 52 and the armrest attachment portion 30B are shielded by the shielding portion 42 of the cover member 9.

[0029] The first contact portion 52A rotates around a portion where the armrest mounting portion 30B is fixed by a bolt (not shown) and contacts the bottom wall portion 31 of the armrest mounting portion 30B. At this time, the armrest mounting portion 30B itself is bent to form an upward opening, so it can withstand the moment from the first contact portion 52A. Also, as shown in FIG. 3, a load input to the tip end 8A of the armrest 8 generates a moment (indicated by the outline arrow in FIG. 3) that twists the outer fitting portion 52 and the armrest mounting portion 30B together. At this time, the armrest mounting portion 30B, including its base portion (indicated by reference symbol 30B2), is bent to form an upward U-shape in cross section, so it can withstand this moment.

[0030] As shown in Figure 5, the upper side of the armrest attachment portion 30B is covered by the seat body 4. A vertical space 100 is formed between the seat body 4 and the armrest attachment portion 30B, which allows the seat body 4 to move downward. In this embodiment, the armrest attachment portion 30B extends approximately horizontally in the left-right direction, while the seat body 4 (seat panel 21) is curved upward as it extends outward in the left-right direction. In other words, the space 100 expands vertically as it extends outward in the left-right direction.

[0031] The shielding portion 42 shields at least the opening of the armrest mounting portion 30B that extends into the space 100. The shielding portion 42 is placed on the flange 33 of the armrest mounting portion 30B. The shielding portion 42 and the upper surface 52a of the outer fitting portion 52 are continuous. In other words, as shown in Figure 4, the armrest mounting portion 30B and its opening cannot be seen from the outside, and the shielding portion 42 and the upper surface 52a of the outer fitting portion 52 are continuous, maintaining a good external appearance.

[0032] As shown in Figure 7, a cover member 9 is attached to the armrest mounting portion 30B of the seat receiving member 5. The cover member 9 has a cover main body 40 with a through hole 41 formed therein, into which the armrest mounting portion 30B is inserted. The cover main body 40 is formed in the shape of a plate that extends in the front-rear direction and is thick in the left-right direction. The through hole 41 is formed as an elongated hole that extends in the front-rear direction according to the shape of the armrest mounting portion 30B, and a slit-like engagement groove 41a that extends in the front-rear direction is formed at the upper end of the through hole 41. As shown in Figure 8, the flange 33 of the armrest mounting portion 30B is inserted into the engagement groove 41a.

[0033] As shown in FIG. 9 , a shielding portion 42 extending outward in the left-right direction like a canopy is provided above the through hole 41 in the cover main body 40. The shielding portion 42 is formed as a plate extending in the left-right direction and having a thickness in the up-down direction. As shown in FIG. 8 , the outer shape of the shielding portion 42 is formed slightly larger than the flange 33 of the armrest attachment portion 30B and is placed on the flange 33. In addition, the shielding portion 42 is engaged with a pair of first abutment portions 52A of the outer fitting portion 52 in a concave-convex manner in the plan view shown in FIG. 3 . In other words, the shielding portion 42 shields the opening of the outer fitting portion 52 located on the upper side of the outer fitting portion 52 and the armrest attachment portion 30B, which are open and communicate with each other in the up-down direction. Note that the outer peripheral edge of the shielding portion 42 may be bent downward and shaped to engage with the outer surface of the flange 33 or both the outer surface and the lower surface of the flange 33.

[0034] 9, an insertion portion 43 extending diagonally inward in the left-right direction is provided at the lower end of the cover main body 40. The lower end of the insertion portion 43 is inserted into the left-right inner side of the cover portion 71 that covers the pivot shaft 15 of the backrest support member 7, as shown in FIG. 5. In other words, the lower end of the insertion portion 43 is inserted into the gap between the base 3 and the backrest support member 7.

[0035] As shown in Figure 9, the cover body 40 has a filling portion 44 extending outward in the left-right direction at the periphery of the through-hole 41, excluding the shielding portion 42. As shown in Figure 5, the filling portion 44 fills the step 101 between the outer surface of the seat receiving member 5 and the outer fitting portion 52 of the armrest 8 that fits onto the armrest mounting portion 30B, and has a shape that is continuous with the outer surface of the outer fitting portion 52. The inside of the filling portion 44 may be hollowed out as long as the external appearance is maintained.

[0036] The cover body 40, the shielding portion 42, the insertion portion 43, and the filling portion 44 configured as described above are integrally molded by resin molding. Note that some or all of the cover body 40, the shielding portion 42, the insertion portion 43, and the filling portion 44 may be separate parts.

[0037] According to the chair 1 having the above configuration, the following effects can be obtained.

[0038] The chair 1 of this embodiment comprises a support structure including legs 2 and bases 3 installed at the upper ends of the legs 2, a seat support member 5 supported by the support structure and having armrest mounting portions 30B, armrests 8 attached to the armrest mounting portions 30B, and a seat body 4 supported by the seat support member 5 and covering the upper part of the armrest mounting portions 30B.As shown in Figure 5, a vertical space 100 is formed between the seat body 4 and the armrest mounting portions 30B to allow downward displacement of the seat body 4.

[0039] According to this configuration, the armrest attachment portion 30B is provided on the seat support member 5, which is a strength member that supports the seat body 4, so that the armrest 8 can be firmly fixed, resulting in a robust structure. Furthermore, by fixing the armrest 8 to the seat support member 5, the seat body 4 (specifically, the seat panel 21) can be made thin and flexible, providing flexibility that gives the seated occupant a comfortable fit. Here, a vertical space 100 that allows downward displacement of the seat body 4 is formed between the armrest attachment portions 30B extending to the left and right of the seat support member 5 and the seat body 4 that covers the armrest attachment portions 30B. This means that the armrest attachment portions 30B do not hinder the flexibility of the seat body 4, and the seated occupant does not feel the hardness of the armrest attachment portions 30B.

[0040] In this embodiment, the armrest attachment portion 30B is located outside the support base 3 of the support structure when viewed from the top to bottom. With this configuration, the armrest attachment portion 30B is located outside the support base 3 when viewed from the top to bottom, so the support base 3 does not interfere with the attachment of the armrest 8.

[0041] In this embodiment, the armrest attachment portion 30B extends in the left-right direction of the seat receiving member 5. This configuration makes it easier to see the armrest attachment portion 30B from the side, facilitating the attachment of the armrest 8.

[0042] In this embodiment, the space 100 expands vertically as it moves outward in the left-right direction. With this configuration, the amount of downward deflection that the seat body 4 can tolerate increases as it moves outward in the left-right direction of the seat body 4, so even for a seated occupant with a large build or large buttocks, the seat body 4 can bend significantly outward in the left-right direction to provide a comfortable fit.

[0043] In this embodiment, the seat support member 5 has a saucer shape with an opening at the top in the vertical direction, and this opening extends to the armrest attachment portion 30B disposed in the space 100. The seat support member 5 is provided with a shielding portion 42 that shields the opening in the armrest attachment portion 30B. With this configuration, the shielding portion 42 shields the opening in the armrest attachment portion 30B, making the opening of the armrest attachment portion 30B invisible from the space 100 between the seat support 4 and the armrest attachment portion 30B, thereby improving the appearance. Furthermore, by arranging the shielding portion 42 above the armrest attachment portion 30B, the armrest attachment portion 30B is covered by the shielding portion 42. Even if the seat support 4 is displaced significantly downward, the armrest attachment portion 30B will abut against the shielding portion 42 before abutting against the armrest attachment portion 30B, thereby reducing the risk of damage to the seat support 4.

[0044] In this embodiment, the periphery of the opening in the armrest attachment portion 30B is provided with a flange 33 (replacement portion) on which the shielding portion 42 is placed. According to this configuration, by providing the flange 33 on the periphery of the opening of the seat receiving member 5, the rigidity of the seat receiving member 5 can be increased, and by utilizing the flange 33 on the armrest attachment portion 30B of the seat receiving member 5, the shielding portion 42 can be stably placed.

[0045] Furthermore, this embodiment includes a cover member 9 having a through hole 41 formed therein into which the armrest attachment portion 30B is inserted, and the shielding portion 42 extends like an eave from the upper part of the through hole 41 in the cover member 9. With this configuration, the through hole 41 into which the armrest attachment portion 30B is inserted is formed, and by having the shielding portion 42 extend like an eave from the cover member 9 which is positioned relative to the armrest attachment portion 30B, it becomes easy to position the shielding portion 42 relative to the opening of the armrest attachment portion 30B.

[0046] In this embodiment, the armrest 8 is fitted onto the armrest attachment portion 30B that extends from the through-hole 41 of the cover member 9. With this configuration, the armrest 8 is fitted onto the armrest attachment portion 30B from the outside with the cover member 9 inserted into the armrest attachment portion 30B, and therefore the cover member 9 can be fixed to the seat receiving member 5 without any fixing parts for the cover member 9, improving assembly ease.

[0047] In addition, the present embodiment provides the following advantageous effects.

[0048] As shown in Figure 5, the chair 1 of this embodiment comprises a seat body 4 on which an occupant sits, a seat support member 5 that supports the seat body 4 and has an armrest mounting portion 30B extending in the left-right direction, an armrest 8 that has an external fitting portion 52 that fits externally onto the armrest mounting portion 30B, and a filling portion 44 that fills in the step 101 between the outer surface of the armrest mounting portion 30B and the external fitting portion 52.

[0049] According to this configuration, by fitting the armrest 8 onto the armrest mounting portion 30B of the seat support member 5, the fitting portion 52 of the armrest 8 is made larger than the armrest mounting portion 30B, thereby increasing the strength of the armrest 8 against the armrest load. On the other hand, the step 101 between the outer surface of the armrest mounting portion 30B and the fitting portion 52, which occurs when the fitting portion 52 of the armrest 8 is made larger than the armrest mounting portion 30B, is filled with the filling portion 44, preventing a deterioration in the appearance.

[0050] In this embodiment, the outer fitting portion 52 abuts against the outer surface of the armrest mounting portion 30B from both front and rear sides. With this configuration, even if a moment load is generated in the front and rear direction on the armrest 8 due to the armrest load, the outer fitting portion 52, which is larger than the armrest mounting portion 30B, abuts against the armrest mounting portion 30B from both front and rear sides, so that the moment load can be dispersed and transmitted to the armrest mounting portion 30B, which is a strength member.

[0051] In this embodiment, the outer fitting portion 52 abuts against the outer surface of the armrest mounting portion 30B from both front-to-rear directions and from the bottom in the up-down direction. With this configuration, even if a moment load is generated on the armrest 8 not only in the front-to-rear direction but also in the left-to-right direction due to the armrest load, the outer fitting portion 52, which is larger than the armrest mounting portion 30B, abuts against the armrest mounting portion 30B from the bottom in the up-down direction, so that the moment load can be dispersed and transmitted to the armrest mounting portion 30B, which is a strength member.

[0052] In this embodiment, the outer fitting portion 52 and the armrest attachment portion 30B have openings that communicate with each other at the upper sides in the vertical direction, and include a shielding portion 42 that shields the upper opening of the outer fitting portion 52. According to this configuration, by shielding the upper opening of the outer fitting portion 52 out of the openings that communicate with each other in the outer fitting portion 52 and the armrest attachment portion 30B, the openings of the outer fitting portion 52 and the armrest attachment portion 30B become invisible, thereby improving the external appearance.

[0053] In this embodiment, the shielding portion 42 and the upper surface 52a of the outer fitting portion 52 are continuously connected. According to this configuration, the shielding portion 42 and the upper surface 52a of the outer fitting portion 52 are continuously connected, which improves the appearance.

[0054] In this embodiment, the shielding portion 42 and the filling portion 44 are integrally formed. With this configuration, the shielding portion 42 and the filling portion 44 are integrally formed, which reduces the number of parts and enables efficient assembly to the seat receiving member 5.

[0055] As described above, according to this embodiment, even when armrests 8 are attached to seat receiving members 5, chair 1 can be obtained that can ensure flexibility of seat body 4 disposed above.

[0056] While the preferred embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above-described embodiments. The shapes and combinations of the components shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention.

[0057] For example, in this embodiment, the armrest attachment portion 30B extends in the left-right direction of the seat receiving member 5. However, if the seat receiving member 5 is rectangular in plan view, the armrest attachment portion 30B may not extend outward in the left-right direction from the main body 30A of the seat receiving member 5. Even in this case, it is desirable that the armrest attachment portion 30B be located outward of the support base 3 when viewed from the top-bottom direction. [Explanation of symbols]

[0058] 1 chair 4 Seat 5 Seat support member 8 armrests 9 Cover member 30B Armrest mounting part 33 flange 41 Through hole 42 Shielding part 44 Filling section 52 External fitting part 52a Top side 100 space

Claims

1. a support structure including legs and bases installed at the upper ends of the legs; a seat support member supported by the support structure and having an armrest mounting portion; an armrest attached to the armrest attachment portion; a seat body that is supported by the seat receiving member and covers an upper portion of the armrest mounting portion, A vertical space is formed between the seat body and the armrest attachment portion to allow downward displacement of the seat body, The seat receiving member has a saucer shape that is open on the upper side in the vertical direction, The opening is formed to an armrest attachment portion disposed in the space, a shielding portion that shields the opening in the armrest attachment portion; a cover member having a through hole into which the armrest attachment portion is inserted, The shielding portion extends like a canopy from above the through hole in the cover member.

2. The chair according to claim 1 , further comprising a mounting portion on which the shielding portion is mounted, the mounting portion being provided at a peripheral edge of the opening in the armrest mounting portion.

3. The chair according to claim 1 or 2, wherein the armrest is fitted onto the armrest attachment portion extending from the through hole of the cover member.

4. a support structure including legs and bases installed at the upper ends of the legs; a seat support member supported by the support structure and having an armrest mounting portion; an armrest attached to the armrest attachment portion; a seat body having a flexible resin seat plate whose left-right central portion is supported by the seat receiving member and which curves upward as it extends outward in the left-right direction to cover the upper portion of the armrest mounting portion and give a comfortable fit to the seat occupant; A vertical space is formed between the seat body and the armrest attachment portion to allow downward displacement of the seat body, The space expands in the vertical direction as it moves outward in the left-right direction, The seat body is configured so that the outer sides in the left and right directions can be displaced downward, starting from the center in the left and right direction.

5. The chair according to any one of claims 1 to 4, wherein the armrest attachment portion is positioned outward of the support base in the support structure when viewed from above and below.

6. The chair according to any one of claims 1 to 5, wherein the armrest attachment portion extends in the left-right direction of the seat support member.

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