TWM614108U - Chair armrest for easy buckling and assembly - Google Patents

Abstract

A chair armrest that is easy to buckle and assemble. The chair armrest includes an armrest bracket, an armrest cushion and a buckle mechanism; wherein the buckle mechanism includes a first buckle that can form a corresponding up-and-down pressing and buckling connection relationship with each other Part and a second buckling part, the first buckling part is a shaft tube, the second buckling part is a sleeve; wherein the armrest bracket is made to use the first buckling part and the second buckle of the connecting mechanism The upper and lower buckling relationship of the joint part is assembled with the armrest cushion body into a whole body. At this time, the armrest cushion body is assembled on the armrest bracket by means of the shaft sleeve being able to rotate on the shaft tube; When the armrest bracket and the shaft tube remain stationary, the armrest cushion body and the shaft sleeve can be adjusted and displaced in the rotation direction relative to the armrest bracket and the shaft tube, so as to relatively reduce the cost of the manufacturing end.

Description

Easy to buckle and assemble chair armrests

The model is a chair armrest, especially a chair armrest that is easy to buckle and assemble.

General functional chair armrests are usually assembled by two main structures: an armrest bracket and an armrest cushion body. Generally, the manufacturing end will not occupy considerable space and facilitate packaging and/or transportation operations. The armrest bracket and the armrest cushion are usually assembled. The body is separated and sent to the customer, and then the client assembles the armrest bracket and the armrest cushion body into one body, so as to relatively reduce the cost of the manufacturing end. However, the current assembly structure between the armrest cushion body and the armrest bracket is not only difficult to assemble, but also requires additional locking parts (such as screws) or assembly tools (such as screwdrivers), especially if it is manufactured The assembly structure of the terminal design is not perfect, and when the client assembles it by itself, the structural strength and/or compactness of the armrest of the chair may be relatively reduced, and it may even cause danger to the consumer terminal.

In addition, the armrest pad that separates the armrest bracket and the armrest pad and sends it to the customer is usually a basic armrest pad structure that cannot move back and forth, left and right, or rotates instead of an armrest pad with multiple moving functions. , Making the armrest cushion body less competitive in the market.

From the above, it can be seen that an easy-to-fasten assembly that can be easily assembled without additional locking parts or assembly tools, and is a movable functional chair armrest structure instead of a basic chair armrest that cannot be moved, which is currently relevant The industry's eager expectant.

The main purpose of the present invention is to provide a chair armrest that is easy to buckle and assemble, in which an armrest bracket is connected to an armrest pad by the up-and-down buckling relationship of a first buckling part and a second buckling part of a connecting mechanism When the armrest bracket and the armrest cushion body are assembled into one body, the armrest cushion body is assembled on the armrest bracket by means of a shaft sleeve that can rotate on a shaft tube; When the bracket and the shaft tube are kept stationary, the armrest cushion body and the shaft sleeve can be adjusted and displaced in the rotation direction relative to the armrest bracket and the shaft tube, so that they can be easily assembled without the need for additional locking parts or assembly tools , Effectively solve the problem of self-assembly of the client to reduce the structural strength and/or tightness of the chair armrest, and the problem of causing danger to the consumer end, and it can be applied to the movable functional chair armrest structure.

In order to achieve the above object, the present invention provides a chair armrest that is easy to buckle and assemble. The chair armrest includes an armrest bracket, an armrest cushion body and a fastening mechanism; wherein the top of the armrest bracket includes a bracket top surface; wherein the armrest pad The body is arranged on the top surface of the armrest bracket, and the bottom surface of the armrest cushion body is provided with a first accommodating space with an opening facing downward; wherein the buckle mechanism is arranged between the armrest bracket and the armrest cushion body, The buckle mechanism includes a first buckle portion and a second buckle portion capable of forming a vertical and corresponding press-fastening connection relationship with each other. The first buckle portion and the second buckle portion can be separately provided on the The top surface of the stent or the corresponding position of the first accommodating space; wherein the first buckling part is a shaft tube, the second buckling part is a shaft sleeve, the shaft tube has a third buckling part, and the shaft sleeve Having a fourth buckling portion corresponding to each of the third buckling portions, the shaft tube can be buckled with each other by the third buckling portion and the fourth buckling portion of the sleeve; wherein the armrest bracket is The upper and lower buckling relationship of the first buckling portion and the second buckling portion of the connecting mechanism is to cooperate with the armrest cushion body to be assembled into one body; wherein when the armrest bracket and the armrest cushion body are cooperatively assembled into one body, the The armrest cushion body is assembled on the armrest bracket by means of the shaft sleeve being able to rotate on the shaft tube; wherein when the armrest bracket and the shaft tube remain stationary, the armrest cushion body and the shaft sleeve can be relatively The armrest bracket and the shaft tube are adjusted and displaced in the rotation direction, so as to relatively reduce the cost of the manufacturing end.

In a preferred embodiment of the present invention, the shaft sleeve further includes a plurality of positioning teeth; wherein the shaft tube further includes a rotating groove for each of the positioning teeth of the shaft sleeve to rotate in the rotating groove, and the rotating groove includes There are a plurality of positioning grids for correspondingly meshing with each of the positioning teeth.

In a preferred embodiment of the present invention, when the shaft sleeve is rotated on the shaft tube to adjust the displacement, each of the positioning teeth can be stopped on each of the positioning grids in sequence along with the rotation; When the positioning teeth are stopped on one of the positioning grids, the armrest cushion body and the armrest bracket form a rotation angle with each other to be positioned.

In a preferred embodiment of the present invention, the first buckling portion is located on the top surface of the bracket of the armrest bracket; wherein the second buckling portion is located on the first accommodating space.

In a preferred embodiment of the present invention, the first buckling portion is located on the first accommodating space; wherein the second buckling portion is located on the top surface of the armrest bracket.

In a preferred embodiment of the present invention, the armrest cushion body is composed of an armrest cushion and an armrest structure.

In a preferred embodiment of the present invention, the first accommodating space is located on the armrest structure.

In a preferred embodiment of the present invention, the armrest structure is composed of an armrest cover and an armrest seat, and the opening of the first accommodating space is located on the armrest seat.

In a preferred embodiment of the present invention, the armrest base of the armrest structure has a sliding block and a sliding groove, and the sliding block can move forward and backward in the sliding groove of the armrest base; When the armrest bracket and the sliding block are not moving, the armrest cushion body can be adjusted and displaced forward and backward relative to the armrest bracket and the sliding block.

In a preferred embodiment of the present invention, the second buckling portion is located on the slider.

In a preferred embodiment of the present invention, the first buckling portion is located on the slider.

In a preferred embodiment of the present invention, the shaft sleeve communicates with the opening of the first accommodating space, and the fourth buckling portion of the shaft sleeve is located on an inner ring wall inside the shaft sleeve; wherein the shaft The sleeve further includes a pressing member, each of the pressing members is located on the slider and located on the upper part of the sleeve, each of the pressing members includes at least two pressing pieces; wherein the at least two pressing pieces form a ring shape Spaced-apart claw-shaped structures; wherein the third buckling portion of the shaft tube is located on the top end of the shaft tube; wherein when the armrest is assembled, the third buckling portion of the shaft tube is subjected to each of the The compressive stress of the at least two pressing pieces of the pressing member is tight, so that each of the third buckling parts is pressed and clamped on each of the fourth buckling parts.

In a preferred embodiment of the present invention, each of the fourth buckling portions is a slot on the wall of each inner ring, a perforation on the wall of each inner ring, or a hole on the wall of each inner ring. The end face.

With the illustrations, the structure and technical features of the present invention will be described in detail below. Each figure is only used to illustrate the structure relationship and related functions of the present invention. Therefore, the dimensions of each element in each figure are not drawn according to the actual scale. It is not intended to limit the present model.

Generally speaking, the armrests of the chair are locked on the left and right sides of the chair (in terms of the direction of the seated person), so the "front and back" or "left and right" directions mentioned in the following disclosures refer to the direction of the person who is sitting. In terms of direction.

With reference to Figures 1, 2 and 15, the present invention provides a chair armrest 1 that is easy to buckle and assemble. The chair armrest 1 includes an armrest bracket 10, an armrest cushion body 20, and a fastening mechanism 30. The chair armrest 1 is capable of The movable functional armrest structure is not the basic armrest that cannot be moved, but it is not restricted.

The top of the armrest bracket 10 includes a bracket top surface 11 as shown in Figs. 2 and 15; wherein the armrest bracket 10 can be adjusted up and down, and the displacement is shown in the direction of arrow C in Fig. 1 but is not limited, so as to increase the number of users. The comfort.

The armrest cushion body 20 is arranged on the top surface 11 of the armrest bracket 10, and the bottom surface of the armrest cushion body 20 is provided with a first accommodating space 21 with an opening facing downward, as shown in FIGS. 2, 3, 7 and 15. The armrest cushion body 20 is composed of an armrest cushion 20a and an armrest structure body 20b but is not limited to those shown in Figures 3 and 7; wherein the first accommodating space 21 is located on the armrest structure body 20b but not Restrictions are shown in Figures 3 and 7; wherein the armrest structure 20b is composed of an armrest cover 22 and an armrest seat 23 but is not limited. As shown in Figures 3 and 7, the opening of the first accommodating space 21 is located The armrest seat 23 is on.

Wherein, the armrest seat 23 of the armrest structure 20b has a sliding block 24 and a sliding groove 25 but not limited to it. As shown in FIGS. 3, 6 and 7, the sliding block 24 can be mounted on the armrest seat 23 forwards and backwards. The inner movement of the chute 25 is shown in the direction of arrow A in FIG. 1 and shown in the direction of arrow F in FIG. 17, so as to increase the comfort of the user.

The buckle mechanism 30 is disposed between the armrest bracket 10 and the armrest cushion body 20. The buckle mechanism 30 includes a first buckle portion 31 and a second buckle that can form a vertical and corresponding press-fit connection relationship with each other. The engaging portion 32 is shown in FIG. 5, and the first engaging portion 31 and the second engaging portion 32 can be respectively provided on the top surface 11 of the support or the corresponding positions of the first accommodating space 21 as shown in FIG. 2, As shown in 7 and 15, the first buckling portion 31 is a shaft tube 36, the second buckling portion 32 is a shaft sleeve 33, the shaft tube 36 has a third buckling portion 37, and the shaft sleeve 33 has a corresponding The fourth buckling portion 34 of each of the third buckling portions 37, the shaft tube 36 can be buckled with each other by the third buckling portion 37 and the fourth buckling portion 34 of the sleeve 33 as shown in Figs. 7 to 10 Shown.

When the chair armrest 1 is assembled, the armrest bracket 10 is assembled with the armrest cushion body 20 by the up-and-down buckling relationship of the first buckling portion 31 and the second buckling portion 32 of the connecting mechanism 30 It is integrated, and the top surface 11 of the armrest bracket 10 and the bottom surface of the armrest cushion body 20 form a close contact state as shown in FIG. 7 without degrading the structural strength and/or tightness of the armrest.

Wherein, when the armrest bracket 10 and the slider 24 are not moving, as shown in FIG. 16, the armrest cushion body 20 can be adjusted forward and backward relative to the armrest bracket 10 and the slider 24. The direction of arrow A in FIG. 1 It is shown in the direction of arrow F in FIG. 17 to help increase the comfort of the user.

In addition, when the armrest bracket 10 and the armrest cushion body 20 are assembled into one body (to form the armrest 1), the armrest cushion body 20 is assembled by means of the shaft sleeve 33 being able to rotate on the shaft tube 36. On the armrest bracket 10; wherein when the armrest bracket 10 and the shaft tube 36 remain stationary, as shown in FIG. 11, the armrest cushion body 20 and the shaft sleeve 33 can perform relative to the armrest bracket 10 and the shaft tube 36 The adjustment displacement of the rotation direction is shown in the direction of arrow B in FIG. 1 and shown in the direction of arrow D in FIG. 12 to help increase the comfort of the user.

2, 4, 11 to 14, the sleeve 33 further includes a plurality of positioning teeth 331 but not limited; wherein the shaft tube 36 further includes a rotating groove 361 for each of the positioning teeth 331 of the sleeve 33 can be in the Rotation in the rotating groove 361 but not limited as shown in the direction of arrow E in FIG. 14, the rotating groove 361 includes a plurality of positioning grids 362 for meshing with each of the positioning teeth 331 correspondingly, as shown in FIGS. 13 and 14.

11 to 14, when the shaft sleeve 33 rotates on the shaft tube 36 to adjust the displacement, as shown in the direction of arrow D in Figure 12, each of the positioning teeth 331 can rotate with it (the arrow in Figure 14 E) sequentially stop on each of the positioning grids 362 as shown in Figures 13 and 14; wherein when each of the positioning teeth 331 is stopped on one of the positioning grids 362, the armrest cushion body 20 and the armrest bracket 10 form a rotation angle θ with each other and are positioned as shown in FIG. 14.

In the embodiment shown in FIGS. 1 to 3 and 7, the first buckling portion 31 is located on the top surface 11 of the armrest bracket 10 but is not limited, and the second buckling portion 32 is located on the first An accommodating space 21 but not limited; in another embodiment shown in FIGS. 1 and 15, the first buckle portion 31 is located on the first accommodating space 21 but not limited; wherein the second buckle The joint 32 is located on the top surface 11 of the armrest bracket 10 but is not limited. If the component symbols shown are the same component symbols used in the description of the embodiment shown in FIGS. 1 to 3 and 7, this is It means the same parts. In other words, the similarity between the two embodiments of the present invention is that they all include the armrest bracket 10, the armrest cushion body 20, and the fastening mechanism 30; the differences between the two embodiments of the present invention The point is: in one embodiment, the first buckle portion 31 is located on the top surface 11 of the armrest bracket 10, and in another embodiment is located on the first accommodating space 21; the second buckle In one embodiment, the joint 32 is located on the first accommodating space 21; in another embodiment, it is located on the top surface 11 of the armrest bracket 10. In addition, between the two embodiments The other structural types are roughly the same, so I won't repeat them here.

In addition, the second buckling portion 32 can be further located on the slider 24 but is not limited as shown in FIG. 6, or the first buckling portion 31 can be further located on the slider 24 but is not limited (not shown in FIG. Show), in order to facilitate more diversified designs and increase product market competitiveness.

2, the sleeve 33 communicates with the opening of the first accommodating space 21, and the fourth buckling portion 34 of the sleeve 33 is located on an inner ring wall 38 inside the sleeve 33 but is not limited to 4 and 5; wherein the sleeve 33 further includes a pressing member 35 but not limited, each of the pressing member 35 is located on the slider 24 and located on the upper part of the sleeve 33 as shown in FIGS. 4, 5, and 7 As shown in 10, each of the pressing members 35 includes at least two pressing pieces 351 as shown in FIGS. 4, 5, and 7 to 10; wherein the at least two pressing pieces 351 form a claw-shaped structure arranged in an annular interval. However, it is not limited as shown in Figure 4; wherein the third buckling portion 37 of the shaft tube 36 is located on the top end of the shaft tube 36; wherein when the armrest 1 is assembled, the third buckling portion 37 of the shaft tube 36 The buckling portion 37 is pressed by the compressive stress of the at least two pressing pieces 351 of each of the pressing members 35, so that each of the third buckling portions 37 is pressed and snapped into each of the fourth buckling portions 34 as shown in the figure. Shown from 7 to 10.

Referring to FIGS. 8 to 10, each of the fourth buckling portions 34 is a slot 34a (as shown in FIG. 8) located on each of the inner ring wall surfaces 38, and a through hole 34b ( As shown in FIG. 9) or an end surface 34c (as shown in FIG. 10) on each of the inner ring wall surfaces 38 (as shown in FIG. 10), but not limited, in order to facilitate more diversified designs and increase product market competitiveness.

3, 16 and 17, the armrest seat 23 further includes a damping gear 26 but not limited; wherein the slider 24 further includes a gear row 27 corresponding to the damping gear 26 but not limited, so that the armrest The cushion body 20 can dampingly adjust the displacement in the forward and backward directions relative to the armrest bracket 10 and the slider 24 as shown in the direction of arrow A in FIG. 1 and shown in the direction of arrow F in FIG. 17, so as to facilitate the increase of product Market Competitiveness.

Compared with the existing chair armrests, the new chair armrest 1 has the following advantages:

(1) The armrest bracket 10 of the present invention is assembled into an integrated body with the armrest cushion body 20 through the up-and-down buckling relationship of the first buckling portion 31 and the second buckling portion 32 of the connecting mechanism 30, This allows users (such as customers) to easily complete the assembly through a simple up-and-down buckle method without the use of locking parts or assembly tools. This is not only conducive to cost saving on the manufacturing side, but also more effective in solving the problem of self-assembly on the client side. The problem of structural strength and/or tightness of the armrest is reduced, and the top surface 11 of the armrest bracket 10 and the bottom surface of the armrest cushion body 20 form a close contact state as shown in FIG. The use of dangerous problems, in order to help increase the market competitiveness of products.

(2) When the armrest bracket 10 and the sliding block 24 of the present invention are not moving, as shown in FIG. 16, the armrest cushion body 20 can adjust the displacement in the forward and backward directions relative to the armrest bracket 10 and the sliding block 24, as shown in FIG. The direction of arrow A is shown in the direction of arrow A and the direction of arrow F in Figure 17 is shown; when the shaft sleeve 33 of the present invention rotates and adjusts displacement on the shaft tube 36, as shown in the direction of arrow D in Figure 12, each The positioning teeth 331 can be sequentially stopped on each of the positioning grids 362 with the rotation (as shown by the arrow E in FIG. 14) as shown in FIGS. 13 and 14; wherein when each positioning tooth 331 is stopped When on one of the positioning grids 362, the armrest cushion body 20 and the armrest support 10 form a rotation angle θ with each other and are positioned as shown in FIG. 14, so that the chair armrest 1 is a movable functional chair armrest structure Instead of basic chair armrests that cannot be moved, it effectively solves the problem of insufficient market competitiveness of existing chair armrests.

The above are only the preferred embodiments of the present invention, which are only illustrative for the present invention and not restrictive; those of ordinary skill in the art understand that they can be used within the spirit and scope defined by the claims of the present invention. Many changes, modifications, and even equivalent changes have been made, but they will all fall into the scope of protection of this new model.

1: Chair armrest 10: Armrest bracket 11: The top surface of the bracket 20: Armrest cushion body 20a: Armrest pad 20b: Handrail structure 21: accommodating space 22: Armrest cover 23: armrest seat 24: Slider 25: Chute 26: Damping gear 27: tooth row 30: Fastening mechanism 31: The first fastening part 32: The second fastening part 33: Shaft sleeve 331: positioning tooth 34: The fourth fastening part 34a: card slot 34b: Piercing 34c: End face 35: Urgent Parts 351: Compression Film 36: Shaft tube 361: turn 362: Positioning grid 37: The third fastening part 38: inner ring wall θ: Angle

FIG. 1 is a schematic diagram of a three-dimensional assembly of an embodiment of the new type. Fig. 2 is a three-dimensional exploded schematic view of Fig. 1. Fig. 3 is a three-dimensional exploded schematic view of Fig. 2. Fig. 4 is a partial enlarged schematic diagram of Fig. 3. Fig. 5 is an exploded schematic diagram of a plane side cross-sectional view of the new clamping element, shaft tube and shaft sleeve. . Fig. 6 is a perspective schematic view of the slider of the new type. Fig. 7 is a schematic side sectional view of the combination of the armrest cushion body and the armrest bracket of the new type. Fig. 8 is a partially enlarged and combined schematic diagram of Fig. 7 (the fourth buckling portion is a groove on the wall surface of each inner ring). Fig. 9 is a partially enlarged and combined schematic diagram of Fig. 7 (the fourth buckling part is a perforation located on the wall surface of each inner ring). Fig. 10 is a partially enlarged and combined schematic diagram of Fig. 7 (the fourth buckling portion is the end surface of each inner ring wall surface). Figure 11 is a schematic top plan view of the armrest of the new chair. Fig. 12 is a schematic diagram of the armrest cushion body and the shaft sleeve in Fig. 11 that can adjust the displacement in the rotation direction relative to the armrest bracket and the shaft tube. Fig. 13 is a partial enlarged schematic diagram of Fig. 11. FIG. 14 is a schematic diagram of the positioning teeth in FIG. 13 being able to stop on each positioning grid in sequence along with the rotation. Fig. 15 is a partial perspective exploded schematic view of another embodiment of Fig. 1. Figure 16 is a schematic top plan view of Figure 1 (with damping gears and tooth rows). Fig. 17 is a schematic diagram showing that the armrest cushion body in Fig. 16 can adjust the displacement in the forward and backward directions relative to the armrest bracket and the sliding block.

1: Chair armrest

10: Armrest bracket

11: The top surface of the bracket

20: Armrest cushion body

20a: Armrest pad

20b: Handrail structure

21: accommodating space

30: Fastening mechanism

31: The first fastening part

32: The second fastening part

33: Shaft sleeve

331: positioning tooth

34: The fourth fastening part

351: Compression Film

36: Shaft tube

361: turn

362: Positioning grid

37: The third fastening part

Claims (13)

A chair armrest that is easy to buckle and assemble, comprising: an armrest bracket, the top of which includes a top surface of the bracket; an armrest cushion body, which is arranged on the top surface of the bracket of the armrest bracket, and the bottom surface of the armrest cushion body is arranged There is a first accommodating space with an opening facing downward; and a buckling mechanism, which is arranged between the armrest bracket and the armrest cushion body, and the buckling mechanism includes a first buckling connection relationship that can form a corresponding vertical connection with each other. A buckling part and a second buckling part, the first buckling part and the second buckling part can be respectively provided on the top surface of the bracket or the corresponding position of the first accommodating space; wherein the first The buckling part is a shaft tube, the second buckling part is a shaft sleeve, the shaft tube has a third buckling part, the shaft sleeve has a fourth buckling part corresponding to each of the third buckling parts, the shaft The tube can be buckled with each other by the third buckling portion and the fourth buckling portion of the sleeve; wherein the armrest bracket is connected by the upper and lower sides of the first buckling portion and the second buckling portion of the connecting mechanism The buckle relationship is to cooperate with the armrest cushion body to be assembled into one body; wherein when the armrest bracket and the armrest cushion body are assembled into a whole body, the armrest cushion body is assembled by means of the shaft sleeve being able to rotate on the shaft tube. On the armrest bracket; wherein when the armrest bracket and the shaft tube remain stationary, the armrest cushion body and the shaft sleeve can be adjusted and displaced in the rotational direction relative to the armrest bracket and the shaft tube. The chair armrest of claim 1, wherein the shaft sleeve further includes a plurality of positioning teeth; wherein the shaft tube further includes a rotary groove for each of the positioning teeth of the shaft sleeve to rotate in the rotary groove, the rotary groove A plurality of positioning grids are included for meshing with each positioning tooth correspondingly. The chair armrest according to claim 2, wherein when the shaft sleeve is rotated on the shaft tube to adjust the displacement, each of the positioning teeth can be sequentially stopped on each of the positioning grids along with the rotation; When each of the positioning teeth stops on one of the positioning grids, the armrest cushion body and the armrest bracket form a rotation angle with each other to be positioned. The chair armrest according to claim 1, wherein the first fastening portion is located on the top surface of the bracket of the armrest bracket; wherein the second fastening portion is located on the first accommodating space. The chair armrest of claim 1, wherein the first buckling portion is located on the first accommodating space; wherein the second buckling portion is located on the top surface of the armrest bracket. The chair armrest according to claim 1, wherein the armrest cushion body is composed of an armrest cushion and an armrest structure. The chair armrest according to claim 6, wherein the first accommodating space is located on the armrest structure. The chair armrest of claim 7, wherein the armrest structure is composed of an armrest cover and an armrest seat, and the opening of the first accommodating space is located on the armrest seat. The chair armrest according to claim 8, wherein the armrest base of the armrest structure has a sliding block and a sliding groove, and the sliding block can move forward and backward in the sliding groove of the armrest base; When the armrest bracket and the sliding block are not moving, the armrest cushion body can be adjusted and displaced forward and backward relative to the armrest bracket and the sliding block. The chair armrest according to claim 9, wherein the second buckling portion is located on the sliding block. The chair armrest according to claim 9, wherein the first buckling portion is located on the sliding block. The armrest of the chair according to claim 9, wherein the shaft sleeve communicates with the opening of the first accommodating space, and the fourth buckling portion of the shaft sleeve is located on an inner ring wall inside the shaft sleeve; wherein the The shaft sleeve further includes a pressing member, each of the pressing members is located on the sliding block and located on the upper part of the shaft sleeve, each of the pressing members includes at least two pressing pieces; wherein the at least two pressing pieces form a ring Spaced Claw-shaped structure; wherein the third buckling portion of the shaft tube is located on the top end of the shaft tube; wherein when the armrest is assembled, the third buckling portion of the shaft tube is subjected to the pressing parts The compressive stress of the at least two pressing pieces is tight, so that each of the third buckling parts is pressed and clamped on each of the fourth buckling parts. The armrest of the chair according to claim 12, wherein each of the fourth buckling portions is a slot on the wall of each inner ring, a perforation on the wall of each inner ring, or a hole on the wall of each inner ring The end face.

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