Chair and armrest arrangement and adjustment mechanism thereof

Abstract

An adjustment mechanism (6) adapted to be incorporated into an armrest (5), the armrest (5) comprising an arm member (51) and a support member (52) arranged in a top-down direction (Z), the arm member (51) being arranged above the support member (52) and rotatably attached thereto, the adjustment mechanism (6) being characterized by: a fixed unit (61) adapted to be fixedly mounted in the support member (52) and comprising the following features: a fixed plate (63) adapted to be adjacent to the arm member (51) and having two spaced arcuate slots (634) extending therethrough in the top-down direction (Z), a positioning plate (65) arranged under the fixed plate (63) and fixedly attached thereto, an elastic plate (64) fixedly attached to the fixed plate (63), arranged between the arcuate slots (634) of the fixed plate (63) and having an outer peripheral surface (644) formed with a plurality of notches (642), at least two of the notches (642) facing one of the arcuate slots (634), the remaining notches (642) facing the other of the arcuate slots (634), and a terminal block (633) extending from one of the fixed plate and the positioning plate (63, 65) to the other of the fixed plate and the positioning plate (63, 65) and having a plurality of cavities (637); and a rotating unit (62) comprising the following features: a connecting plate (66) having a connecting plate body (661) adapted to be rotatably mounted in the arm member (51) together with the same, and two rotary columns (662) connected to the connecting plate body (661), adapted to extend from the arm member (51) and each movably extending into the arc slots (634) of the fixed plate (63), each of the rotary columns (662) removably engaging a corresponding one of the notches (642) of the elastic plate (64) facing a respective one of the arc slots (634), a rotary plate (67) arranged between the fixed plate (63) and the positioning plate (65) and rotatably connected to the rotary columns (662) of the connecting plate (66) and an engagement component (69) rotatably mounted on the rotary plate (67) and removably engaging one of the cavities (637) of the terminal block (633).

Description

[0001] The disclosure relates to a chair and, more particularly, to an armrest assembly of a chair having an armrest that is rotatable via an adjustment mechanism.

[0002] A conventional adjustment mechanism disclosed in US Patent Application Publication No. 20080073965 A1 is adapted to be incorporated into a chair and includes a rotary member 2 and a holder 13.

[0003] The chair includes an armrest support (not shown) and an armrest 11 disposed above and rotatably mounted to the armrest support. The pivot member 12 is rotatably mounted within the armrest 11 and has an inner surface defining a compartment 120. The inner surface of the pivot member 12 has two toothed portions disposed on opposite sides of the compartment 120. Each of the toothed portions defines a plurality of recesses 121 that are in spatial communication with the compartment 120.

[0004] The retainer 13 is disposed within the compartment 120 of the pivot member 12 and has two opposing openings 130 and two locking stubs 132, each received in the openings 131. A screw 14 threadably engages the retainer 13 and extends through a lower end of the pivot member 12 to connect the retainer 13 to the armrest support. Each of the locking stubs 132 of the retainer 13 removably engages one of the recesses 121 of a respective one of the toothed portions of the pivot member 12, thereby positioning the armrest 11 relative to the armrest support.

[0005] To adjust the armrest 11, i.e., to rotate the armrest 11 relative to the armrest support, a user simply needs to apply force to the armrest 11. Once a rotational force exerted by the user exceeds a resistance resulting from friction between the locking stubs 132 and the corresponding recesses 121, the locking stubs 132 are disengaged from the recesses 121, thereby allowing the pivot member 12 to rotate with the armrest 11 relative to the holder 13 and the armrest support until the locking stubs 132 engage two other of the recesses 121.

[0006] However, during use of such a conventional adjustment mechanism, the user may inadvertently rotate the armrest 11 because the friction between the locking lugs 132 and the toothed portions 121 often does not provide sufficient resistance. To solve this problem, the adjustment mechanism can be enlarged (i.e., to increase the overall friction contact area). However, this causes another problem: since the adjustment mechanism is built into the armrest 11, the overall size of the armrest 11 would also have to be increased, which could result in a bulky and heavy chair and limit the downsizing options.

[0007] US 2018 / 0 020 834 A1 discloses an armrest assembly for a chair. US 2004 / 0 201 267 A1 discloses an adjustable four-plate assembly for a chair.

[0008] The object of the present invention is to provide an adjustment mechanism, an armrest arrangement and a chair with improved characteristics.

[0009] This object is achieved by a mechanism according to claim 1, an arrangement according to claim 9 and a chair according to claim 10.

[0010] Accordingly, an adjustment mechanism is adapted to be incorporated into an armrest. The armrest comprises an arm member and a support member arranged in a top-down direction. The arm member is arranged above the support member and rotatably attached thereto. The adjustment mechanism comprises a fixed unit and a rotating unit.

[0011] The fixed unit is adapted to be fixedly mounted in the support member and includes a fixed plate, a positioning plate, an elastic plate and a terminal block.

[0012] The fixed plate is adapted to be adjacent to the arm member and has two spaced arcuate slots extending therethrough in the top-down direction. The positioning plate is disposed below the fixed plate and fixedly secured thereto. The elastic plate is fixedly secured to the fixed plate, is disposed between the arcuate slots of the fixed plate, and has an outer peripheral surface formed with a plurality of notches. At least two of the notches face one of the arcuate slots, and the remaining notches face the other of the arcuate slots. The terminal block extends from one of the fixed plate and the positioning plate to the other of the fixed plate and the positioning plate and has a plurality of concaves.

[0013] The rotating unit includes a connecting plate, a rotating plate and an engagement component.

[0014] The connecting plate includes a connecting plate body adapted to be rotatably mounted in the arm member, and two rotary columns connected to the connecting plate body, which are adapted to extend from the arm member and which respectively movably extend into the arc slots of the fixed plate. Each of the rotary columns removably engages a corresponding one of the notches of the elastic plate facing a respective one of the arc slots. The rotary plate is disposed between the fixed plate and the positioning plate and is rotatably connected to the rotary columns of the connecting plate. The engaging component is rotatably mounted on the rotary plate and removably engages one of the concaves of the terminal block.

[0015] An armrest assembly includes an armrest and the aforementioned adjustment mechanism. The armrest includes an arm member and a support member arranged in a top-down direction. The arm member is arranged above the support member and rotatably attached thereto. The adjustment mechanism is built into the armrest.

[0016] A chair includes a seat assembly, a base assembly disposed beneath and secured to the seat assembly, and at least one of the above-mentioned armrest assemblies connected to the seat assembly.

[0017] Preferred embodiments of the present invention are explained in more detail below with reference to the accompanying drawings. They show: Fig. 1 is a partial plan view of an armrest illustrating a conventional adjustment mechanism disclosed in U.S. Patent Application Publication No. 20080073965 A1; Fig. 2 is an exploded perspective view of the conventional adjustment mechanism; Fig. 3 is a perspective view of an embodiment of a chair according to the disclosure; Fig. 4 is a partially exploded perspective view of an armrest assembly of the embodiment; Fig. 5 is a schematic bottom view of the armrest assembly illustrating an arm member rotatable relative to a support member; Fig. 6 a partial sectional view along line VI-VI in Fig. 5; Fig. 7 is an exploded partial perspective view of the armrest assembly; Fig. 8 is an exploded partial perspective view of a fixed plate and the support member of the armrest assembly; Fig. 9 is an assembled perspective view of the fixed plate, a terminal block, and an elastic plate of the armrest assembly; Fig. 10 is a partial bottom view of the armrest assembly showing a pivoting unit in a neutral position relative to a fixed unit; Fig. 11 a partial sectional view along line XI-XI in Fig. 5; Fig. 12 is a further partial bottom view of the armrest assembly showing the rotating unit in an inward position relative to the fixed unit; and Fig. 13 is yet another partial bottom view of the armrest assembly showing the rotating unit in an outwardly directed position relative to the fixed unit.

[0018] With reference to Fig. 3 and Fig. 4, an embodiment of a chair according to the disclosure includes a seat assembly 200, a base assembly 300, and two armrest assemblies 400.

[0019] The seat assembly 200 is adapted for a user to sit upon. The base assembly 300 is disposed and secured beneath the seat assembly 200 for support. The armrest assemblies 400 are spaced apart in a left-to-right (Y) direction and connected to opposite sides of the seat assembly 200. Each of the armrest assemblies 400 includes an armrest 5 and an adjustment mechanism 6. Since the armrest assemblies 400 are symmetrical, the following description refers to only one of the chair's armrest assemblies 400 for brevity.

[0020] The armrest 5 of the armrest assembly 400 includes an arm member 51 and a support member 52 arranged in a top-down direction (Z) substantially perpendicular to the left-right direction (Y). The arm member 51 is arranged above the support member 52 and is rotatably mounted thereon.

[0021] With reference to Fig. 4 to 6, the support member 52 has a hollow upper portion 521 and a lower portion 522 connected to a lower end of the upper portion 521. The upper portion 521 has front and rear sides 5211, 5212 opposite each other in a front-to-rear direction (X) substantially perpendicular to the left-to-right and top-to-bottom directions (Y, Z), and is formed with a side opening 523 communicating with the interior of the upper portion 521. The arm member 51 has front and rear ends 501, 502 located at front and rear sides 5211, 5212 of the upper portion 521 of the support member 52, respectively. In the present embodiment, the arm member 51 includes a lower case 511 and a top plate 512.The lower housing 511 is rotatably connected to the upper portion 521 of the support member 52, defines a receiving space 510, and is formed with a lower opening 513 that is in spatial communication with the receiving space 510. The upper plate 512 is arranged above the lower housing 511 to cover the receiving space 510 and is adapted for the user to rest their arm thereon.

[0022] With reference to Fig. 6 to 8, the adjustment mechanism 6 is installed in the armrest 5 and comprises a fixed unit 61 and a rotating unit 62.

[0023] The fixed unit 61 is fixedly mounted in the upper portion 521 of the support member 52 and includes a fixed plate 63, an elastic plate 64, a positioning plate 65, and a terminal block 633.

[0024] With reference to Fig. 6, Fig. 7 and Fig. 9, the fixed plate 63 of the fixed unit 61 has a fixed plate body 631, a fixed shaft 632 and two spaced arc slots 634.

[0025] The fixed plate body 631 of the fixed plate 63 is adjacent to the arm member 51 of the armrest 5, is fixed to the support member 52 of the armrest 5, and is formed with the arcuate slots 634. In this embodiment, the fixed plate body 631 is fixed to the support member 52 via threaded fasteners.

[0026] The fixed shaft 632 of the fixed plate 63 includes a shaft tube 635 extending from the fixed plate body 631 along a rotation axis (RA) extending in the top-bottom direction (Z), and a positioning fixture 636 extending through the shaft tube 635.

[0027] The arcuate slots 634 of the fixed plate 63 extend in the top-to-bottom direction (Z) through the fixed plate body 631, are arranged along a neutral axis (NA) perpendicular to the rotation axis (RA), and are respectively located on opposite sides of the rotation axis (RA). A recess is formed in a lower surface of the fixed plate body 631 and is arranged between and connecting the arcuate slots 634.

[0028] The elastic plate 64 of the fixed unit 61 is firmly embedded in the fixed plate 63. More specifically, the elastic plate 64 is fixed in the recess of the fixed plate body 631 between the arcuate slots 634 and is substantially flush with the lower surface of the fixed plate body 631. In this embodiment, the elastic plate 64 has a center hole 641, a plurality of buffer holes 643, and an outer peripheral surface 644 surrounding the center hole 641 and the buffer holes 643 and formed with six notches 642.

[0029] The elastic plate 64 is slid onto the fixed shaft 632 of the fixed plate 63, with the fixed shaft 632 extending through the center hole 641. The buffer holes 643 extend through the elastic plate 64 and are located between the center hole 641 and the outer peripheral surface 644 of the elastic plate 64. Three of the notches 642 face one of the arc slots 634, and the remaining three of the notches 642 face the other of the arc slots 634.

[0030] It should be noted that in the present embodiment, the fixed plate 63 and the elastic plate 64 are formed separately, and the elastic plate 64 is made of a plastic material. Due to the configuration of the buffer holes 643 and the material properties of the plastic material, the elastic plate 64 provides flexibility to enable smooth operation of the adjustment mechanism 6, which will be described below. However, in variations of the embodiment, the fixed plate 63 and the elastic plate 64 may also be molded as one piece.

[0031] The positioning plate 65 of the fixed unit 61 is disposed below the fixed plate and the elastic plate 63, 64 and is fixedly secured to the fixed plate 63. Specifically, the positioning plate 65 has a positioning hole 651 that engages with the fixed shaft 632 of the fixed plate 63 in such a manner that the positioning fastener 636 of the fixed shaft 632 threadably engages the positioning hole 651 of the positioning plate 65. However, in other embodiments of the disclosure, the fixed shaft 632 may be configured as a fixed shaft provided with an external thread that threadably engages the positioning hole 651 without the positioning fastener 636.

[0032] The terminal block 633 of the fixed unit 61 extends from the fixed plate 63 to the positioning plate 65 and has three concaves 637 facing the fixed shaft 632 of the fixed plate 63. In the present embodiment, the terminal block 633 is configured with a wave-shaped surface defining the three concaves 637, and the terminal block 633 and the fixed plate 63 are molded as one piece.

[0033] With reference to Fig. 6, Fig. 7 and Fig. 10, the rotating unit 62 is rotatably connected to the arm member 51 of the armrest 5 and comprises a connecting plate 66, a rotating plate 67, two connecting fastening devices 68 and an engaging component 69.

[0034] The connecting plate 66 of the rotating unit 62 includes a connecting plate body 661 and two rotating columns 662. The connecting plate body 661 is rotatably mounted in the arm member 51 of the armrest 5. The rotating columns 662 are connected to the connecting plate body 661, extend from the arm member 51 via the lower opening 513, and each movably extends into the arcuate slots 634 of the fixed plate 63 of the fixed unit 61. Each of the rotating columns 662 removably engages a corresponding one of the three notches 642 of the elastic plate 64 facing a respective one of the arcuate slots 634 of the fixed plate 63.In the present embodiment, each of the rotary columns 662 of the connecting plate 66 has an outer surface formed with four convex portions 663 arranged at regular angles to improve the frictional engagement between each of the rotary columns 662 and the corresponding one of the notches 642 of the elastic plate 64.

[0035] It should be noted that the support member 52 is connected to the arm member 51 via the connecting plate 66, which abuts against and is connected to the lower housing 511 of the arm member 51.

[0036] With reference to Fig. 6, Fig. 7 and Fig. 11, the rotary plate 67 of the rotary unit 62 is disposed between the fixed plate 63 and the positioning plate 65 of the fixed unit 61 and has a through hole 672, two spaced screw holes 673, and an outer peripheral surface surrounding the rotation axis (RA) and formed with a receiving slot 671.

[0037] The receiving slot 671 is close to the concave portions 637 of the connecting block 633. The through-hole 672 is in spatial communication with the receiving slot 671 and engages with the fixed shaft 632 of the fixed plate 63 of the fixed unit 61. The screw holes 673 are respectively arranged on opposite sides of the through-hole 672 and are respectively aligned with the pivot posts 662 of the connecting plate 66.

[0038] The connecting fasteners 68 of the rotating unit 62 each extend through the rotating columns 662 of the connecting plate 66 and threadably engage the screw holes 673 of the rotating plate 67, so that the rotating plate 67 is rotatably connected to the connecting plate 66 together therewith and so that the rotating unit 62 is rotatable relative to the fixed unit 61 about the rotation axis (RA).

[0039] With reference to Fig. 7, Fig. 10 and Fig. 11, the engaging component 69 of the rotating unit 62 is rotatably mounted on the rotating plate 67 together with the rotating plate 67 to engage with one of the concave portions 637 of the terminal block 633.

[0040] In the present embodiment, the engagement component 69 includes an engagement seat 691 and a spring 692. The engagement seat 691 is movably received in the receiving slot 671 and has an engagement projection 693 that removably engages one of the cavities 637. The spring 692 has opposite ends that abut against the engagement seat 691 and the fixed shaft 632, respectively, to improve the engagement between the engagement projection 693 and one of the concaves 637. However, in variations of the embodiment, the receiving slot 671 and the through hole 672 of the rotary plate 67 may not be in spatial communication with each other, so that the opposite ends of the spring 692 abut against the engagement seat 691 and an inner surface of the rotary plate 67, respectively, defining the receiving slot 671, which still provides the same function as mentioned.

[0041] It should be noted that in other embodiments of the disclosure, the terminal block 633 may extend from the positioning plate 65 to the fixed plate 63, that is, as long as the engagement component 69 is capable of engaging the concavities 637 of the terminal block 633, the terminal block 633 may extend from one of the fixed plate and the positioning plate 63, 65 to the other of the fixed plate and the positioning plate 63, 65.

[0042] Referring to Fig. 10, Fig. 12 and Fig. 13, the rotating unit 62 is adjustable relative to the fixed unit 61 between an inwardly directed position (see Fig. 12), an outward-facing position (see Fig. 13) and a neutral position (see Fig. 10) between the inward and outward positions.

[0043] When the rotary unit 62 is in the neutral position, the engaging projection 693 of the engaging component 69 protrudes in a direction substantially perpendicular to the neutral axis (NA) and the rotation axis (RA). The pivot columns 662 of the rotary unit 62 engage two corresponding notches 642 of the fixed unit 61, which are opposite along the neutral axis (NA). The engaging projection 693 engages the middle one of the concave portions 637 of the terminal block 633 of the fixed unit 61. The arm member 51 of the armrest 5 extends substantially in the front-to-back direction (X).

[0044] When the rotary unit 62 is shifted from the neutral position to the inward position, the rotary columns 662 of the rotary unit 62 disengage from the two notches 642 and slide to engage two other corresponding notches 642 that are not aligned with the neutral axis (NA). The engaging projection 693 is disengaged from the middle one of the concaves 637 and slides to engage the lower one of the concaves 637 (as shown in Fig. 10 and Fig. 12 from the viewer's perspective). The arm member 51 of the armrest 5 is rotated counterclockwise (from the viewer's perspective) to be transverse to the front-to-back direction (X); more specifically, the front end 501 of the arm member 51 is directed slightly toward the user sitting in the chair, while the rear end 502 of the arm member 51 is directed slightly away from the user.

[0045] When the rotary unit 62 is shifted from the neutral position to the outward position, the rotary columns 662 of the rotary unit 62 are disengaged from the two notches 642 and slide to engage the other two corresponding notches 642 that are not aligned with the neutral axis (NA). The engaging projections 693 are disengaged from the middle one of the concaves 637 and slide to engage the upper one of the concaves 637 (as shown in Fig. 10 and Fig.13 from the viewer's perspective). The arm member 51 of the armrest 5 is rotated clockwise to be transverse to the front-to-back direction (X); more specifically, the front end 501 of the arm member 51 is directed slightly away from the user, while the rear end 502 of the arm member 51 is directed slightly toward the user. In this way, the user is able to adjust the armrest 5 to suit his or her needs.

[0046] In summary, due to the engagement between the two pivot posts 662 and two of the notches 642 of the elastic plate 64, and the engagement between the engagement component 69 and one of the concave portions 637 of the terminal block 633, the adjustment mechanism 6 of the armrest assembly 400 of the present embodiment has three contact surfaces. Compared to the prior art adjustment mechanism, which has only two contact surfaces, the present embodiment provides a larger total contact surface to generate more frictional force without having to increase the size of the armrest 5, thus providing opportunities for a more compact design.

[0047] In the above description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiment. However, it will be apparent to those skilled in the art that one or more other embodiments may be practiced without some of these specific details. It should also be understood that reference in this description to "one embodiment," "an embodiment with a display of an atomic number," etc., means that a particular feature, structure, or characteristic may be included in the practice of the disclosure.It should further be understood that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof in order to streamline the disclosure and aid in understanding the various aspects of the invention, and that one or more features or specific details of one embodiment may be practiced together with one or more features or specific details of another embodiment where appropriate in practicing the disclosure.

Claims

[1] An adjustment mechanism (6) adapted to be incorporated into an armrest (5), the armrest (5) comprising an arm member (51) and a support member (52) arranged in a top-down direction (Z), the arm member (51) being arranged above the support member (52) and rotatably attached thereto, the adjustment mechanism (6) being characterized by: a fixed unit (61) adapted to be fixedly mounted in the support member (52) and comprising the following features: a fixed plate (63) adapted to be adjacent to the arm member (51) and having two spaced arcuate slots (634) extending therethrough in the top-down direction (Z), a positioning plate (65) arranged under the fixed plate (63) and fixedly attached thereto, an elastic plate (64) fixedly attached to the fixed plate (63), arranged between the arcuate slots (634) of the fixed plate (63) and having an outer peripheral surface (644) formed with a plurality of notches (642), at least two of the notches (642) facing one of the arcuate slots (634), the remaining notches (642) facing the other of the arcuate slots (634), and a terminal block (633) extending from one of the fixed plate and the positioning plate (63, 65) to the other of the fixed plate and the positioning plate (63, 65) and having a plurality of cavities (637); and a rotating unit (62) comprising the following features: a connecting plate (66) having a connecting plate body (661) adapted to be rotatably mounted in the arm member (51) together with the same, and two rotary columns (662) connected to the connecting plate body (661), adapted to extend from the arm member (51) and each movably extending into the arc slots (634) of the fixed plate (63), each of the rotary columns (662) removably engaging a corresponding one of the notches (642) of the elastic plate (64) facing a respective one of the arc slots (634), a rotary plate (67) arranged between the fixed plate (63) and the positioning plate (65) and rotatably connected to the rotary columns (662) of the connecting plate (66) and an engagement component (69) rotatably mounted on the rotary plate (67) and removably engaging one of the cavities (637) of the terminal block (633). [2] Adjustment mechanism (6) according to claim 1, characterized by , that: the fixed plate (63) further comprises a fixed shaft (632) extending along a rotation axis (RA) extending in the top-bottom direction (Z), the elastic plate (64) being slid onto the fixed shaft (632), the rotary unit (62) being rotatable about the rotation axis (RA); the terminal block (633) extends from the fixed plate (63), the cavities (637) of the terminal block (633) facing the fixed shaft (632); and the arcuate slots (634) are arranged along a neutral axis (NA) which is perpendicular to the rotation axis (RA) and are respectively arranged on opposite sides of the rotation axis (RA). [3] Adjustment mechanism (6) according to claim 2, characterized by , that: the positioning plate (65) is arranged under the elastic plate (64) and has a positioning hole (651) which engages with the fixed shaft (632) of the fixed plate (63); and the rotary plate (67) has an outer peripheral surface surrounding the rotation axis (RA) and formed with a receiving slot (671) close to the concave portions (637) of the terminal block (633); and the engagement component (69) is movably received in the receiving slot (671) and has an engagement projection (693) that removably engages one of the cavities (637). [4] Adjustment mechanism (6) according to claim 3, characterized by , that: the rotary plate (67) further comprises: a through hole (672) in spatial communication with the receiving slot (671), wherein the fixed shaft (632) engages the through hole (672) and two spaced-apart screw holes (673) each arranged on opposite sides of the through hole (672); and the rotating unit (62) further comprises two connecting fastening devices (68) which each extend through the rotating columns (662) and which each threadably engage the screw holes (673) of the rotating plate (67). [5] Adjustment mechanism (6) according to one of claims 3 and 4, characterized by that the intervention component (69) comprises the following features: an engagement seat (691) movably received in the receiving slot (671) and having the engagement projection (693); and a spring (692) connected to the engagement seat (691) for improving the engagement between the engagement projection (693) and one of the cavities (637). [6] Adjustment mechanism (6) according to one of claims 3 to 5, characterized by , that: the fixed plate (63) further comprises a fixed plate body (631) adapted to be adjacent to the arm member (51) of the armrest (5) and formed with the arcuate slots (634); and the fixed shaft (632) has a shaft tube (635) extending from the fixed plate body (631) in the top-bottom direction (Z), and a positioning fixture (636) extending through the shaft tube (635) and threadably engaging the positioning hole (651) of the positioning plate (65). [7] Adjustment mechanism (6) according to one of claims 3 to 6, characterized by , that: the rotating unit (62) is adjustable relative to the fixed unit (61) between an inwardly directed position, an outwardly directed position and a neutral position between the inwardly directed and the outwardly directed position; and the engaging projection (693) of the engaging component (69) protrudes in a direction substantially perpendicular to the neutral axis (NA) and the rotation axis (RA) when the rotary unit (62) is at the neutral position. [8] Adjustment mechanism (6) according to one of claims 2 to 7, characterized by that the elastic plate (64) further has the following features: a center hole (641), wherein the fixed shaft (632) of the fixed plate (63) extends through the center hole (641); and a plurality of buffer holes (643) extending through the elastic plate (64) and arranged between the center hole (641) and the outer peripheral surface (644) of the elastic plate (64). [9] Armrest arrangement (400) characterized by: an armrest (5) comprising an arm member (51) and a support member (52) arranged in a top-down direction (Z), the arm member (51) being arranged above the support member (52) and rotatably attached thereto; and the adjustment mechanism (6) according to claim 1, which is installed in the armrest (5). [10] Chair, characterized by : a seating arrangement (200); a base assembly (300) disposed beneath and secured to the seat assembly (200); and at least one of the armrest assemblies (400) according to claim 9, which is connected to the seat assembly (200).

Images