CN112167874B

CN112167874B - Armrest structure and seat

Info

Publication number: CN112167874B
Application number: CN202011233376.9A
Authority: CN
Inventors: 杨博弈
Original assignee: Alu Rehab Xiamen Co ltd
Current assignee: Alu Rehab Xiamen Co ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2023-07-07
Anticipated expiration: 2040-11-06
Also published as: CN112167874A

Abstract

The invention provides an armrest structure and a seat, wherein the armrest structure comprises an armrest panel, an upper fluted disc, a lower fluted disc, a sliding rod, a first elastic piece and an armrest frame; the handrail panel is internally provided with a first base, the upper fluted disc is fixedly connected in the first base, the upper fluted disc is stacked on the lower fluted disc, one opposite surfaces of the upper fluted disc and the lower fluted disc are tooth-shaped surfaces, and the two tooth-shaped surfaces are meshed with each other; the sliding rod is fixed on the armrest frame, a second base is arranged at the top of the sliding rod, the lower fluted disc is fixedly connected in the second base, and the upper fluted disc can rotate relative to the lower fluted disc; the first elastic piece is arranged in the first base or the second base, when the handrail panel is rotated, the upper fluted disc rotates together with the handrail panel to drive the upper fluted disc to rotate relative to the lower fluted disc, and the upper fluted disc moves upwards due to the upward elastic deformation of the first elastic piece or the lower fluted disc moves downwards due to the downward elastic deformation of the first elastic piece; the armrest structure of the invention can rotate and has simple structure.

Description

Armrest structure and seat

Technical Field

The invention relates to the field of armrests of seats, in particular to an armrests structure and a seat.

Background

The chair is one of the indispensable furniture as common furniture in the daily life of a user, the common design is that the armrests are additionally arranged on two sides of the chair for the user to place arms, and the original armrests are mostly fixed and cannot be adjusted according to the stature, the arm length, the habitual bending angle and the like of the user. The seat with the adjustable armrests can bring better sitting experience to the user; currently, seat armrests in the market generally have only height adjustment, width adjustment and small-range angle adjustment functions.

As shown in fig. 1 and 2, chinese patent name "armrest apparatus" (grant bulletin number CN107874504B, grant bulletin date 2019.12.06) discloses an armrest apparatus capable of performing stepless adjustment of position and angle, comprising a base 2', a fixing plate 3', a pivot unit 4', an armrest plate 5', a positioning unit 6', and a cushion 7'. In this patent, the positioning module 61' is disposed through the pivot unit 4' and is matched with the positioning plate 62', the magnetic attraction force can provide resistance against the movement of the armrest plate 5' relative to the fixed plate 3', so as to achieve temporary positioning effect, and the magnetic attraction force does not have the limitation of switching positions, so that the user can continuously adjust the moving position and the rotating angle of the armrest plate 5' relative to the fixed plate 3 '. The positioning module 61' includes a positioning member 611' having the magnetic attraction force with the positioning plate 62', and a receiving member 612' for the positioning member 611' to be engaged with. The first moving slot 31', the sliding slot 51', and the positioning module 61 'and the positioning plate 62' are matched to perform the functions of moving, rotating, positioning and the like. By providing the second moving slot 32' for the second pivot 42' to penetrate, the function of moving the armrest plate 5' left and right relative to the fixed plate 3' can be increased, and the angle of left and right rotation can be increased, and by matching the two positioning modules 61', the positioning efficiency of the positioning plate 62' to the pivot unit 4' can be increased, so as to improve the stability in positioning. By providing the rack module 631 'of the rack plate 63' and providing the first tooth 411 'and the second tooth 421' on the first pivot 41 'and the second pivot 42' respectively, the first pivot 41 'and the second pivot 42' can be forced to rotate around their axes when moving along the first direction L1, thereby increasing the moving resistance to avoid the first pivot 41 'and the second pivot 42' from easily moving along the first direction L1. However, the armrest device with the structure has complex structure, various parts and complex connection relationship.

Disclosure of Invention

The present invention aims to solve at least to some extent one of the technical problems in the above-described technology. To this end, an object of the present invention is to provide a handrail structure that is simple in structure and rotatable.

A second object of the invention is to propose a seat.

In order to achieve the above objective, an embodiment of the present invention provides an armrest structure, which includes an armrest panel, an upper toothed disc, a lower toothed disc, a sliding rod, a first elastic member, and an armrest frame; the handrail panel is internally provided with a first base, the upper fluted disc is fixedly connected in the first base, the upper fluted disc is stacked on the lower fluted disc, the opposite surfaces of the upper fluted disc and the lower fluted disc are tooth-shaped surfaces, and the two tooth-shaped surfaces are meshed with each other; the sliding rod is fixed on the armrest frame, a second base is arranged at the top of the sliding rod, the lower fluted disc is fixedly connected in the second base, and the upper fluted disc can circumferentially rotate relative to the lower fluted disc; the first elastic piece is arranged in the first base or the second base, when the handrail panel is rotated, the upper fluted disc rotates along with the handrail panel to drive the upper fluted disc to rotate relative to the lower fluted disc, and the upper fluted disc moves upwards due to the upward elastic deformation of the first elastic piece, or the lower fluted disc moves downwards due to the downward elastic deformation of the first elastic piece.

Based on the design, the upper fluted disc rotates along with the handrail panel when rotating, and when the teeth of the upper fluted disc and the teeth of the lower fluted disc are opposite to each other, the upper fluted disc can move upwards along with the elastic deformation of the first elastic piece, or the lower fluted disc can move downwards along with the elastic deformation of the first elastic piece, so that the handrail panel smoothly rotates to a preset position.

In addition, the handrail structure according to the embodiment of the present invention may further have the following additional technical features:

the handrail panel is provided with a stop piece, and the stop piece is positioned at the rear of the handrail panel; a limiting block is arranged on the bottom surface of the handrail panel; when the armrest panel rotates outwards by a certain angle, one end of the armrest panel corresponding to the stop piece is blocked on the stop piece; when the handrail panel rotates inwards to reset, the limiting block is blocked in the handrail frame. When the armrest panel rotates outwards by an angle of preferably 50 degrees, the stop piece is used for propping against the limit armrest panel; when the armrest panel rotates inwards to restore to the original position, the limiting block props against the armrest frame, and the limiting piece and the limiting block respectively play a limiting role on the limiting positions of the armrest panel in two directions.

The limiting block is a strip-shaped component extending along the long side direction of the handrail panel.

The rear end of the handrail panel is provided with an arc part, one side of the stopping piece corresponding to the handrail panel is provided with a concave arc opening, the concave arc opening is matched with the arc part, and when the handrail panel rotates outwards for an angle, the arc part of the handrail panel is blocked at the concave arc opening of the stopping piece. The concave arc opening and the arc part are designed to enable the handrail panel to be matched with the stop piece better, and the structure is more compact.

The lower surface of the sliding rod is provided with a counter bore, and the counter bore extends from the lower surface of the sliding rod to the top surface of the second base; also comprises a connecting component; the connecting assembly comprises a sleeve, the first elastic piece, a gasket and a bolt, wherein the sleeve sequentially passes through the counter bore, the lower fluted disc and the upper fluted disc from bottom to top and is inserted into the first base, the first elastic piece and the gasket are sleeved on the sleeve and are all arranged in the counter bore, and the gasket is arranged below the first elastic piece and is clamped at the head of the bolt; the bolt penetrates into the sleeve and the first base from bottom to top in sequence, so that the first base of the handrail panel is fixedly connected with the second base of the sliding rod, and the first base can be rotatably arranged relative to the second base. The upper fluted disc and the lower fluted disc are meshed with each other, when the handrail panel is to be rotated, the upper fluted disc rotates along with the upper fluted disc, when the tooth tip of the upper fluted disc is rotated to be opposite to the tooth tip of the lower fluted disc, the first elastic piece is extruded by downward acting force to elastically deform downwards, the lower fluted disc also moves downwards along with the lower fluted disc, and the handrail panel and the upper fluted disc smoothly rotate to a preset position under the yielding of the lower fluted disc.

The upper fluted disc and the lower fluted disc are provided with a central hole, the opposite surfaces of the upper fluted disc and the lower fluted disc are outer side surfaces, and the outer side surfaces of the upper fluted disc and the lower fluted disc are provided with a plurality of raised strips; a boss and a plurality of grooves matched with the convex strips are arranged in the first base and the second base; the central hole of the upper fluted disc is tightly sleeved on the boss of the first base, and the convex strips of the upper fluted disc are respectively clamped in the grooves of the first base in a one-to-one correspondence manner; the central hole of the lower fluted disc is tightly sleeved on the boss of the second base, and the convex strips of the lower fluted disc are respectively clamped in the grooves of the second base in a one-to-one correspondence manner. The upper fluted disc, the lower fluted disc, the handrail panel and the sliding rod are injection molding pieces which are formed in one step respectively, and are designed in a split mode, so that the processing and the manufacturing are facilitated.

The first elastic member is preferably a rubber sleeve. Because the rubber sleeve has certain bearing capacity and the allowance of elastic deformation can be well controlled, namely, when the rubber sleeve is not extruded by external force, the tooth surfaces of the upper fluted disc and the lower fluted disc can be meshed with each other stably, the handrail panel is not easy to rotate randomly relative to the sliding rod, and once the handrail panel starts to rotate circumferentially under the action of the external force, the rubber sleeve can be driven to generate tiny downward deformation when the teeth of the upper fluted disc and the teeth of the lower fluted disc are staggered with each other, so that the circumferential rotation of the handrail panel relative to the sliding rod is realized.

The handrail frame comprises an elongated groove-shaped member and a handrail rod, wherein the groove-shaped member is integrally connected to the top of the handrail rod, and the sliding rod is fixed in the groove-shaped member in a back-and-forth movable manner. The long-strip-shaped groove-shaped member can better fix the sliding rod and can also adjust the fixing position of the sliding rod in the long-side direction of the groove-shaped member.

Two second strip holes are formed in the groove-shaped member, and the two second strip holes are arranged on the bottom surface of the groove-shaped member at intervals; the sliding rod is arranged in the groove-shaped member and is connected with the groove-shaped member in a back-and-forth movable way through the two locating pieces and the two second strip holes.

The device also comprises an adjusting mechanism, wherein the adjusting mechanism comprises a positioning column, a sealing cover, a second elastic piece and a button, the positioning column comprises a body and a shrinking clamping head, one end of the body is integrally connected with the clamping head, and the other end of the body is provided with a through hole; the second elastic piece is positioned in the through hole and is clamped between the through hole and the sealing cover; the button is tightly sleeved on the clamping head, and one end of the clamping head corresponding to the body is provided with a convex part; the groove-shaped member is internally provided with a wavy first strip hole, and the first strip hole is arranged on the side surface of the groove-shaped member; the slide bar is provided with a through hole which is penetrated left and right, the body, the second elastic piece and the sealing cover of the positioning column are all positioned in the through hole, the clamping head of the positioning column extends out of the first strip hole, and the convex part is clamped in the first strip hole; the cover is clamped in a side wall of the groove-shaped member opposite to the first strip-shaped hole. The button is pressed to enable the positioning column to compress the second elastic piece and shift towards the sealing cover direction, the convex part moves towards the inside of the groove-shaped member and leaves the first strip-shaped hole, the sealing cover is abutted against the side wall of the groove-shaped member under the action of the second elastic piece, and at the moment, the handrail panel is moved forwards or backwards, so that the sliding rod can be caused to move forwards or backwards relative to the groove-shaped member.

The adjusting mechanism further comprises a screw rod, the screw rod is sequentially inserted into the button, the clamping head, the body and the second elastic piece, and the screw rod is in locking connection with the button. The screw rod is arranged, one end of the second elastic piece can be sleeved on the screw rod, and the second elastic piece is better positioned.

The second elastic piece is a spring or a shrapnel.

In order to achieve the above object, a second aspect of the present invention provides a seat, which includes a base, a seat board, a backrest, and two armrest structures respectively disposed on the left and right sides of the seat board.

Drawings

Fig. 1 is an exploded view of a conventional armrest apparatus.

Fig. 2 is a diagram showing the cooperation of a rack plate and a pivot unit of a conventional armrest apparatus.

Fig. 3 is an exploded view of an armrest structure according to the present invention.

Fig. 4 is a front perspective view of an armrest structure according to the present invention.

Fig. 5 is a schematic view of a handrail structure according to the present invention.

Fig. 6 is an orthographic view of a handrail structure of the present invention.

Fig. 7 is a bottom view of an armrest structure according to the present invention.

Fig. 8 is a cross-sectional view taken along the direction F-F in fig. 7.

Fig. 9 is a sectional view in the direction B-B of fig. 7.

Fig. 10 is a schematic view of a handrail panel according to the present invention.

Detailed Description

For a better understanding of the present invention, before describing the armrest structure 100 of the present invention in detail, several directional terms are defined, the term "inwardly" referring to the movement of the armrest panel 1 in a direction toward the longitudinal centerline of the vehicle, and the term "outwardly" referring to the movement of the armrest panel 1 in a direction away from the longitudinal centerline of the vehicle; the term "forward" refers to a direction from the stopper 7 horizontally toward the armrest panel 1, "backward" is a direction opposite to "forward", and a forward direction a is shown in fig. 4; the term "upward" is the direction from the slide bar 4 vertically upward toward the armrest panel 1, and "downward" is the opposite direction.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

Referring to fig. 3 and fig. 6-8, a seat (not shown) includes a base, a seat board, a backrest and two armrest structures 100, wherein the two armrest structures 100 are respectively disposed on the left and right sides of the seat board, and the armrest structure 100 on either side is mainly disposed on both sides of the seat, and the armrest structure 100 on either side includes an armrest panel 1, an upper fluted disc 2, a lower fluted disc 3, a sliding rod 4, a first elastic member 51, an armrest frame 6, a stopper 7, a connection assembly 5 and an adjusting mechanism 8; the rear end part of the handrail panel 1 is an arc part 13, and a first base 11 is arranged in the handrail panel 1; the bottom surface of the handrail panel 1 is provided with a limiting block 12, and the limiting block 12 is preferably an elongated member extending along the long side direction of the handrail panel 1. The sliding rod 4 is fixed on the armrest frame 6, a second base 41 is arranged at the top of the sliding rod 4, and a through hole 43 which penetrates left and right is arranged on the sliding rod 4; the lower surface of the slide rod 4 is provided with a counter bore 42, and the counter bore 42 extends from the lower surface of the slide rod 4 to the top surface of the second base 41. The handrail panel 1, the upper fluted disc 2, the lower fluted disc 3, the sliding rod 4, the handrail frame 6 and the stop piece 7 are injection molding pieces.

Referring to fig. 3, 8 and 10, the upper toothed disc 2 is fixedly connected in the first base 11, the upper toothed disc 2 is stacked on the lower toothed disc 3, the opposite surfaces of the upper toothed disc 2 and the lower toothed disc 3 are tooth-shaped surfaces a, and the two tooth-shaped surfaces a are meshed with each other; the upper fluted disc 2 and the lower fluted disc 3 are respectively provided with a central hole O, the opposite surfaces of the upper fluted disc 2 and the lower fluted disc 3 are respectively provided with an outer side surface b, and the outer side surfaces b of the upper fluted disc 2 and the lower fluted disc 3 are respectively provided with a plurality of raised strips b1. The lower fluted disc 3 is fixedly connected in the second base 41, the first base 11 is rotatably connected with the second base 41, and the upper fluted disc 2 can circumferentially rotate relative to the lower fluted disc 3; the first base 11 and the second base 41 are provided with a boss d1 and a plurality of grooves d2 matched with the convex strips b1, the central hole O of the upper fluted disc 2 is tightly sleeved on the boss d1 of the first base 11, and the convex strips b1 of the upper fluted disc 2 are respectively and correspondingly clamped in the grooves d2 (see fig. 10) of the first base 11; the central hole O of the lower fluted disc 3 is tightly sleeved on the boss d1 of the second base 41, and the plurality of protruding strips b1 of the lower fluted disc 3 are respectively clamped in the plurality of grooves d2 of the second base 41 in a one-to-one correspondence manner.

Referring to fig. 3, 8 and 10, the first elastic member 51 is disposed in the first base 11 or the second base 41, and when the armrest panel 1 is rotated, the upper toothed disc 2 rotates with the armrest panel 1 to drive the upper toothed disc 2 to rotate relative to the lower toothed disc 3, and the upper toothed disc 2 moves upward due to the upward elastic deformation of the first elastic member 51, or the lower toothed disc 3 moves downward due to the downward elastic deformation of the first elastic member 51. When the armrest panel 1 rotates, the upper toothed disc 2 rotates with the armrest panel, and when the teeth of the upper toothed disc 2 and the lower toothed disc 3 are opposite to each other, the upper toothed disc 2 moves upwards along with the elastic deformation of the first elastic member 51, or the lower toothed disc 3 moves downwards along with the elastic deformation of the first elastic member 51, so that the armrest panel 1 rotates smoothly to a predetermined position.

Referring to fig. 3 and 8, the connecting assembly 5 includes a sleeve 52, the first elastic member 51, a spacer 53 and a bolt 54, in a preferred embodiment, the sleeve 52 sequentially passes through the counterbore 42, the lower toothed disc 3 and the upper toothed disc 2 from bottom to top and is inserted into the first base 11, the first elastic member 51 and the spacer 53 are both sleeved on the sleeve 52 and are both disposed in the counterbore 42, and the spacer 53 is disposed below the first elastic member 51 and is clamped at the head of the bolt 54; the first elastic member 51 is preferably a rubber sleeve. The bolt 54 sequentially penetrates the sleeve 52 and the first base 11 from bottom to top, so that the first base 11 of the handrail panel 1 is fixedly connected with the second base 41 of the sliding rod 4, and the first base 11 can be rotatably arranged relative to the second base 41. The upper toothed disc 2 and the lower toothed disc 3 are engaged with each other, when the armrest panel 1 is to be rotated, the upper toothed disc 2 rotates along with it, and when the tooth tips of the upper toothed disc 2 and the tooth tips of the lower toothed disc 3 are opposite, the first elastic member 51 is pressed by a downward force to elastically deform downward, the lower toothed disc 3 also moves downward along with it, and the armrest panel 1 and the upper toothed disc 2 smoothly rotate to a predetermined position under the yielding of the lower toothed disc 3.

Referring to fig. 3 and 8, in another preferred embodiment, the counter bore 42 is disposed in the first base 11, the sleeve 52 sequentially passes through the counter bore 42, the upper fluted disc 2 and the lower fluted disc 3 from top to bottom, and is inserted into the second base 41, the first elastic member 51 and the spacer 53 are both sleeved on the sleeve 52 and are both disposed in the counter bore 42, and the spacer 53 is disposed above the first elastic member 51 and is clamped to the head of the bolt 54; the bolt 54 sequentially penetrates the sleeve 52 and the second base 41 from top to bottom, and is in locking connection with the second base 41, and the first base 11 can be rotatably arranged relative to the second base 41.

Referring again to fig. 4-7, the stop 7 is located behind the arm panel 1; the blocking piece 7 has a concave arc opening 71 corresponding to one side of the handrail panel 1, the concave arc opening 71 is matched with the arc portion 13, and when the handrail panel 1 rotates outwards by a certain angle, the arc portion 13 of the handrail panel 1 is blocked in the concave arc opening 71 of the blocking piece 7. When the armrest panel 1 rotates outwards by an angle, one end of the armrest panel 1 corresponding to the stop piece 7 is blocked on the stop piece 7; when the armrest panel 1 rotates inwards to reset, the limiting block 12 is blocked on the armrest frame 6. When the armrest panel 1 is rotated outwards by an angle of preferably 50 °, the stop 7 abuts against the armrest panel 1; when the armrest panel 1 rotates inwards to restore to the original position, the limiting block 12 props against the armrest frame 6, and the limiting piece 7 and the limiting block 12 respectively limit the limiting positions of the armrest panel 1 in two directions. The design of the concave arc opening 71 and the arc part 13 can enable the handrail panel 1 to be matched with the stop piece 7 better, and the structure is more compact.

Referring to fig. 3 and 5-6, the handrail frame 6 includes an elongated channel member 61 and a handrail 62, the channel member 61 is integrally connected to the top of the handrail 62, a first elongated hole 611 and two second elongated holes 612 are formed in the channel member 61, the first elongated hole 611 is formed on a side surface of the channel member 61, and the two second elongated holes 612 are formed on a bottom surface of the channel member 61 at intervals. The elongated channel member 61 can better fix the slide bar 4, and the fixing position of the slide bar 4 in the longitudinal direction of the channel member 61 can also be adjusted. The slide bar 4 is movably fixed in the channel member 61 back and forth, i.e. the slide bar 4 is placed in the channel member 61 and is movably connected to the channel member 61 back and forth by means of two positioning members 9 and two second elongated holes 612. The positioning piece 9 and the second elongated hole 612 play a guiding role for the front-back movement of the slide bar 4 with respect to the channel member 61, and restrict the upward extraction of the slide bar 4 in the vertical direction with respect to the channel member 61.

Referring to fig. 3 and 9, the adjusting mechanism 8 includes a positioning post 81, a cover 82, a second elastic member 83, a button 84, and a screw 85; the positioning column 81 comprises a body 811 and a chuck 812, wherein one end of the body 811 is integrally connected with the chuck 812, and the other end is provided with a through hole 8110; the second elastic member 83 is located in the through hole 8110, and the second elastic member 83 is clamped between the through hole 8110 and the cover 82; the button 84 is tightly sleeved on the chuck 812, and one end of the chuck 812 corresponding to the body 811 is provided with a convex part 8121; the body 811, the second elastic member 83 and the cover 82 of the positioning post 81 are all located in the through hole 43, the chuck 812 of the positioning post 81 extends out of the first elongated hole 611, and the protruding portion 8121 is clamped in the first elongated hole 611; the cover 82 is retained in a side wall of the channel member 61 opposite the first elongated hole 611. The screw rod 85 is sequentially inserted into the button 84, the clamping head 812, the body 811 and the second elastic piece 83, and the screw rod 85 is in locking connection with the button 84; the screw rod 85 is arranged, so that one end of the second elastic piece 83 is sleeved on the screw rod 85, and the second elastic piece 83 is better positioned. The second elastic member 83 is preferably a spring. The first elongated hole 611 is in a wavy shape, so that the first elongated hole 611 has a width of alternating peaks and valleys, the convex portion 8121 of the positioning post 81 is clamped at the valley position of the narrower width of the first elongated hole 611, and the height of the clamping head 812 of the positioning post 81 is smaller than the valley width of the first elongated hole 611; when the front-back position of the armrest structure 100 needs to be adjusted, the positioning column 81 is moved to the long side direction of the first elongated hole 611, the protrusion 8121 of the positioning column 81 is moved to the peak position of the wider width of the first elongated hole 611, then the button 84 is held to push the positioning column 81 to the direction of the cover 82, the protrusion 8121 is moved to the inside of the channel member 61 and away from the first elongated hole 611, the cover 82 abuts against the side wall of the channel member 61 under the action of the second elastic member 83, and at this time, the armrest panel 1 is moved forward or backward, so that the slide bar 4 is caused to move forward or backward relative to the channel member 61.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. An armrest structure (100), characterized by: comprises an armrest panel (1), an upper fluted disc (2), a lower fluted disc (3), a sliding rod (4), a first elastic piece (51) and an armrest frame (6); the handrail panel (1) is internally provided with a first base (11), the upper fluted disc (2) is fixedly connected in the first base (11), the upper fluted disc (2) is stacked on the lower fluted disc (3), one opposite surfaces of the upper fluted disc (2) and the lower fluted disc (3) are tooth-shaped surfaces (a), and the two tooth-shaped surfaces (a) are meshed with each other;

the sliding rod (4) is fixed on the armrest frame (6), a second base (41) is arranged at the top of the sliding rod (4), the lower fluted disc (3) is fixedly connected in the second base (41), and the upper fluted disc (2) can circumferentially rotate relative to the lower fluted disc (3);

the first elastic piece (51) is arranged in the first base (11) or the second base (41), when the handrail panel (1) is rotated, the upper fluted disc (2) rotates along with the handrail panel (1) to drive the upper fluted disc (2) to rotate relative to the lower fluted disc (3), and at the moment, the upper fluted disc (2) moves upwards due to upward elastic deformation of the first elastic piece (51), or the lower fluted disc (3) moves downwards due to downward elastic deformation of the first elastic piece (51).

2. A handrail construction (100) according to claim 1, wherein: the handrail comprises a stop piece (7), wherein the stop piece (7) is positioned at the rear of the handrail panel (1);

a limiting block (12) is arranged on the bottom surface of the handrail panel (1); when the handrail panel (1) rotates outwards by a certain angle, one end of the handrail panel (1) corresponding to the stop piece (7) is blocked on the stop piece (7); when the handrail panel (1) rotates inwards to reset, the limiting block (12) is blocked in the handrail frame (6).

3. A handrail construction (100) according to claim 2, wherein: the limiting block (12) is a strip-shaped member extending along the long side direction of the handrail panel (1).

4. A handrail construction (100) according to claim 2, wherein: the rear end part of the handrail panel (1) is provided with an arc part (13), one side of the stopping piece (7) corresponding to the handrail panel (1) is provided with a concave arc opening (71), the concave arc opening (71) is matched with the arc part (13), and when the handrail panel (1) rotates outwards for an angle, the arc part (13) of the handrail panel (1) is blocked at the concave arc opening (71) of the stopping piece (7).

5. A handrail construction (100) according to claim 1, wherein: the lower surface of the sliding rod (4) is provided with a counter bore (42), and the counter bore (42) extends from the lower surface of the sliding rod (4) to the top surface of the second base (41);

also comprises a connecting component (5); the connecting assembly (5) comprises a sleeve (52), a first elastic piece (51), a gasket (53) and a bolt (54), wherein the sleeve (52) sequentially passes through the counter bore (42), the lower fluted disc (3) and the upper fluted disc (2) from bottom to top and is inserted into the first base (11), the first elastic piece (51) and the gasket (53) are both sleeved on the sleeve (52) and are both arranged in the counter bore (42), and the gasket (53) is arranged below the first elastic piece (51) and is clamped at the head of the bolt (54);

the bolts (54) sequentially penetrate into the sleeve (52) and the first base (11) from bottom to top, so that the first base (11) of the handrail panel (1) is fixedly connected with the second base (41) of the sliding rod (4), and the first base (11) can be rotatably arranged relative to the second base (41).

6. A handrail construction (100) according to claim 5, wherein: the upper fluted disc (2) and the lower fluted disc (3) are provided with a central hole (O), the opposite surfaces of the upper fluted disc (2) and the lower fluted disc (3) are outer side surfaces (b), and the outer side surfaces (b) of the upper fluted disc (2) and the lower fluted disc (3) are provided with a plurality of raised strips (b 1);

a boss (d 1) and a plurality of grooves (d 2) matched with the raised strips (b 1) are arranged in the first base (11) and the second base (41);

the central hole (O) of the upper fluted disc (2) is tightly sleeved on the boss (d 1) of the first base (11), and the convex strips (b 1) of the upper fluted disc (2) are respectively clamped in the grooves (d 2) of the first base (11) in a one-to-one correspondence manner; the central hole (O) of the lower fluted disc (3) is tightly sleeved on the boss (d 1) of the second base (41), and the convex strips (b 1) of the lower fluted disc (3) are respectively clamped in the grooves (d 2) of the second base (41) in a one-to-one correspondence manner.

7. A handrail construction (100) according to claim 1 or 5 or 6, characterized in that: the first elastic piece (51) is a rubber sleeve.

8. A handrail construction (100) according to any one of claims 1-6, wherein: the handrail frame (6) comprises an elongated groove-shaped member (61) and a handrail rod (62), the groove-shaped member (61) is integrally connected to the top of the handrail rod (62), and the sliding rod (4) is fixed in the groove-shaped member (61) in a back-and-forth movable manner.

9. A handrail construction as claimed in claim 7, wherein: the handrail frame (6) comprises an elongated groove-shaped member (61) and a handrail rod (62), the groove-shaped member (61) is integrally connected to the top of the handrail rod (62), and the sliding rod (4) is fixed in the groove-shaped member (61) in a back-and-forth movable manner.

10. A handrail construction (100) according to claim 8 or 9, wherein: two second strip holes (612) are formed in the groove-shaped member (61), and the two second strip holes (612) are arranged on the bottom surface of the groove-shaped member (61) at intervals; the slide bar (4) is arranged in the groove-shaped member (61) and is connected with the groove-shaped member (61) in a back-and-forth movable way through two positioning pieces (9) and two second strip holes (612).

11. A handrail construction (100) according to claim 10, wherein: the automatic clamping device is characterized by further comprising an adjusting mechanism (8), wherein the adjusting mechanism (8) comprises a positioning column (81), a sealing cover (82), a second elastic piece (83) and a button (84), the positioning column (81) comprises a body (811) and a clamping head (812), one end of the body (811) is integrally connected with the clamping head (812), and the other end of the body is provided with a through hole (8110); the second elastic piece (83) is positioned in the through hole (8110), and the second elastic piece (83) is clamped between the through hole (8110) and the sealing cover (82); the button (84) is tightly sleeved on the clamping head (812), and one end of the clamping head (812) corresponding to the body (811) is provided with a convex part (8121);

the groove-shaped member (61) is internally provided with a first strip-shaped hole (611) which is wave-shaped, and the first strip-shaped hole (611) is arranged on the side surface of the groove-shaped member (61); the sliding rod (4) is provided with a through hole (43) which is penetrated left and right;

the body (811), the second elastic piece (83) and the sealing cover (82) of the positioning column (81) are all positioned in the through hole (43), the clamping head (812) of the positioning column (81) extends out of the first strip hole (611), and the convex part (8121) is clamped in the first strip hole (611); the cover (82) is clamped in a side wall of the groove-shaped member (61) opposite to the first strip-shaped hole (611).

12. A handrail construction (100) according to claim 11, wherein: the adjusting mechanism (8) further comprises a screw rod (85), the screw rod (85) is sequentially inserted into the button (84), the clamping head (812), the body (811) and the second elastic piece (83), and the screw rod (85) is in locking connection with the button (84).

13. A handrail construction (100) according to claim 11 or 12, wherein: the second elastic piece (83) is a spring or a shrapnel.

14. A seat, includes base, bedplate and back, its characterized in that: the armrest structure (100) as claimed in any one of claims 1-13, wherein the armrest structure (100) is disposed on the left and right sides of the seat plate.