CN112843602A

CN112843602A - Chair with detachable seat

Info

Publication number: CN112843602A
Application number: CN202110255310.8A
Authority: CN
Inventors: 邢金秋; 都吉良; 黄日新; 刘创; 王涌斌
Original assignee: Guangzhou Yikang Medical Equipment Industrial Co ltd
Current assignee: Guangzhou Yikang Medical Equipment Industrial Co ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-05-28

Abstract

The invention discloses a seat, which comprises a cushion, a backrest, a first installation seat and a horizontal rotation adjusting mechanism, wherein the horizontal rotation adjusting mechanism comprises a second installation seat and a first locking component, the first locking component comprises a lock disc, a lock rod and a first elastic part, the horizontal rotation adjusting mechanism is used for realizing the horizontal rotation adjustment of the cushion, the cushion and the backrest are installed on the second installation seat, the second installation seat is rotationally connected with the first installation seat, the horizontally rotationally adjusted position of the second installation seat is locked through the first locking component, the lock rod of the first locking component can be clamped with the lock disc, a plurality of circumferentially arranged lock grooves are arranged on the lock disc, the lock disc and the lock rod are respectively arranged on the first installation seat and the second installation seat, a user manually operates the lock rod to enable a bulge on the lock rod to be separated from the lock grooves to unlock, the second installation seat can be horizontally rotated and adjusted relative to the first installation seat, the invention is used in the technical field of seat adjustment.

Description

Chair with detachable seat

Technical Field

The invention relates to the technical field of seat adjustment, in particular to a seat.

Background

The existing seat is not complete in adjusting functions in the aspects of adapting to human postures, human sizes and the like, and in the related technology, the existing seat is generally only limited to up-and-down adjustment and elevation adjustment of a backrest.

Disclosure of Invention

The present invention is directed to solve at least one of the problems of the prior art and to provide a seat that can be horizontally rotated and adjusted.

According to an embodiment of the present invention, there is provided a seat including: the cushion is used for a user to sit; a backrest for a user to lean against; a first mounting seat; the horizontal rotation adjusting mechanism comprises a second mounting seat and a first locking component, the seat cushion and the backrest are mounted on the second mounting seat, and the second mounting seat is rotationally connected with the first mounting seat; the first locking assembly comprises a locking disc, a locking rod and a first elastic piece, at least one locking groove is circumferentially arranged on the locking disc, a protrusion used for being clamped and matched with the locking groove is arranged on the locking rod, the locking disc is arranged on the first installation seat or the second installation seat, correspondingly, the locking rod is movably connected with the second installation seat or the first installation seat, the first elastic piece is used for providing acting force for enabling the locking rod to be in contact and matched with the locking groove, the locking rod has a first state and a second state, and the protrusion on the locking rod is clamped and connected with one of the locking grooves on the locking disc in the first state so as to fix the position of the second installation seat; and in a second state, the protrusion on the lock rod is separated from the lock groove, so that the second mounting seat can be horizontally and rotatably adjusted relative to the first mounting seat.

The seat at least has the following beneficial effects: the horizontal rotation adjustment of the cushion is realized through the horizontal rotation adjusting mechanism, wherein the cushion and the backrest are installed on the second installation seat, the second installation seat is rotatably connected with the first installation seat, the position of the second installation seat after the horizontal rotation adjustment is locked through the first locking component, the lock rod of the first locking component can be connected with the lock disk in a clamping mode, a plurality of lock grooves which are circumferentially arranged are formed in the lock disk, the lock disk and the lock rod are respectively arranged on the first installation seat and the second installation seat, a user manually operates the lock rod to enable the protrusion on the lock rod to be separated from the lock grooves, the locking is released, the second installation seat can be horizontally rotated and adjusted relative to the first installation seat, after the adjustment, the lock rod is released, the lock rod rebounds under the elastic action of the first elastic piece to reset, the protrusion is in clamping fit with one lock groove after the horizontal rotation adjustment, the locking is re-locked, and the position fixation after the.

According to the seat provided by the embodiment of the invention, the lock disc is arranged on the first installation seat, the bottom of the second installation seat is provided with the connecting seat, the second installation seat is hinged with the lock rod through the connecting seat, one end of the first elastic piece abuts against the bottom of the second installation seat, and the other end of the first elastic piece abuts against the lock rod.

According to the seat provided by the embodiment of the invention, the seat further comprises a lifting mechanism and a third mounting seat, wherein the lifting mechanism is arranged between the first mounting seat and the third mounting seat and is used for lifting and adjusting the height position of the first mounting seat, and further adjusting the height position of the seat cushion.

According to the seat provided by the embodiment of the invention, the lifting mechanism comprises a first swing rod, a second swing rod and a first driving mechanism, one end of the first swing rod and one end of the second swing rod are respectively hinged with the first installation seat, the other end of the first swing rod and the other end of the second swing rod are respectively hinged with the third installation seat, the first swing rod, the second swing rod, the first installation seat and the third installation seat are arranged to form a parallelogram structure, and the first driving mechanism is used for driving the first swing rod or the second swing rod to rotate.

According to the seat provided by the embodiment of the invention, the seat further comprises a base, the third installation seat is connected with the base in a sliding mode, and the third installation seat can be adjusted along the base in a sliding mode.

According to the seat provided by the embodiment of the invention, the seat further comprises a second locking assembly, the second locking assembly comprises a first meshing part and a second meshing part, the second meshing part is provided with a meshing part, the meshing part is parallel to the horizontal sliding direction of the third mounting seat, teeth which can be mutually clamped and matched are arranged on the first meshing part and the meshing part, the first meshing part is fixed on the third mounting seat, the second meshing part is movably mounted on the base, and the meshing part of the second meshing part has a third state which is in contact fit with the first meshing part and a fourth state which is separated from the first meshing part.

According to the seat provided by the embodiment of the invention, the second locking component further comprises a second elastic element and a pedal, the second meshing element is hinged with the base, the second elastic element is used for providing acting force for enabling the first meshing element and the second meshing element to be in contact fit, the pedal is provided with a pedal end and a contact end in contact with the second meshing element, the pedal is hinged with the base, the pedal end can be stepped by a user, the contact end can lift the second meshing element, and the meshing part is separated from the first meshing element.

According to the seat provided by the embodiment of the invention, the seat further comprises a backrest moving mechanism, the backrest moving mechanism comprises a first slide rail, a first slide block and a third locking piece, the backrest is installed on the first slide block, the first slide rail is arranged on the second installation seat, the first slide block is connected with the first slide rail in a sliding mode, and the third locking piece is used for locking and fixing the position of the first slide block on the first slide rail.

According to the seat provided by the embodiment of the invention, the seat further comprises a backrest elevation angle adjusting mechanism, the backrest elevation angle adjusting mechanism comprises a fourth mounting seat and an extensible member, the fourth mounting seat is fixed on the first sliding block, the backrest is hinged to the fourth mounting seat, the fixed end of the extensible member is hinged to the fourth mounting seat, the extensible end of the extensible member is hinged to the backrest, and the extensible end of the extensible member can stretch and is used for driving the backrest to rotate and adjust.

According to the seat provided by the embodiment of the invention, the seat further comprises an armrest, the armrest is connected with the backrest, the armrest comprises a fixed arm, a handrail and a fourth locking piece, the handrail is rotatably connected with the fixed arm, a plurality of first positioning holes are circumferentially arranged on the handrail, a second positioning hole is arranged on the fixed arm, and the fourth locking piece is detachably inserted into the second positioning hole and one of the first positioning holes so as to fix the angle position of the handrail.

According to the seat provided by the embodiment of the invention, the front end of the seat cushion is saddle-shaped.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic view of another embodiment of the present invention;

FIG. 3 is a schematic plan view of the horizontal rotation adjustment mechanism of the embodiment of the present invention;

FIG. 4 is an enlarged sectional view of portion A-A of FIG. 3, showing the locking groove of the locking plate snap-fitted to the protrusion of the locking bar, in accordance with an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a lifting mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a lifting mechanism according to another embodiment of the present invention;

FIG. 7 is a schematic structural view of a second locking assembly in accordance with the embodiment of the present invention;

FIG. 8 is an enlarged sectional view of the portion B-B in FIG. 7, in which the first engaging member is engaged with the engaging portion of the second engaging member;

FIG. 9 is a schematic structural view of a backrest moving mechanism according to an embodiment of the present invention;

FIG. 10 is a schematic view of the backrest elevation adjustment mechanism according to an embodiment of the present invention;

FIG. 11 is a schematic view of an angle adjustment mechanism for an armrest in accordance with an embodiment of the present invention;

FIG. 12 is a schematic view of a handrail according to an embodiment of the present invention;

reference numerals: the seat cushion 110, the backrest 120, the armrest 200, the fixed arm 210, the handrail 220, the first positioning hole 221, the fourth locking element 230, the limiting column 240, the first mounting seat 300, the horizontal rotation adjusting mechanism 400, the second mounting seat 410, the connecting seat 411, the rotating shaft 412, the bearing seat 413, the first locking component 420, the locking disc 421, the locking groove 4211, the locking rod 422, the protrusion 4221, the first elastic element 423, the lifting mechanism 500, the first swing link 510, the backrest comprises a second swing link 520, a first driving mechanism 530, a third mounting base 540, a base 600, a second sliding rail 610, a caster 620, a second locking component 700, a first meshing component 710, a second meshing component 720, a meshing part 721, a second elastic component 730, a pedal 740, a pedal end 741, a contact end 742, a backrest moving mechanism 800, a first sliding rail 810, a first sliding block 820, a third locking component 830, a backrest elevation angle adjusting mechanism 900, a fourth mounting base 910, a telescopic component 920 and an operating rod 921.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 4, an embodiment of the present invention provides a seat including a seat cushion 110, a backrest 120, a first mount 300, and a horizontal rotation adjustment mechanism 400, wherein the seat cushion 110 is adapted to be seated by a user, and the backrest 120 is adapted to be reclined by the user; the horizontal rotation adjusting mechanism 400 comprises a second mounting seat 410 and a first locking component 420, wherein the seat cushion 110 and the backrest 120 are mounted on the second mounting seat 410, and the second mounting seat 410 is rotatably connected with the first mounting seat 300, specifically, through a rotating shaft 412 and a bearing seat 413; the first locking assembly 420 comprises a locking disc 421, a locking rod 422 and a first elastic piece 423, wherein the locking disc 421 is provided with a plurality of locking grooves 4211 arranged circumferentially, the locking rod 422 is provided with a protrusion 4221 used for being in clamping fit with the locking grooves 4211, the locking disc 421 is arranged on the first mounting seat 300, the locking rod 422 is movably connected with the second mounting seat 410, and specifically, the bottom of the second mounting seat 410 is provided with a connecting seat 411 hinged with the locking rod 422 through the connecting seat 411; the first elastic member 423 provides an acting force for enabling the lock bar 422 to be in contact fit with the lock groove 4211, one end of the first elastic member 423 abuts against the bottom of the second mounting seat 410, the other end abuts against the lock bar 422, and the first elastic member 423 may specifically adopt a spring and is in a compressed state; the lock bar 422 has a first state and a second state, in the first state, the protrusion 4221 on the lock bar 422 is clamped with one of the lock grooves 4211 on the lock disc 421 to fix the position of the second mounting seat 410; in the second state, the boss 4221 on the lock lever 422 is disengaged from the locking groove 4211, so that the second mounting seat 410 can be horizontally and rotatably adjusted relative to the first mounting seat 300.

In the seat of the embodiment, the horizontal rotation adjustment of the seat cushion 110 is realized through the horizontal rotation adjustment mechanism 400, wherein the seat cushion 110 and the backrest 120 are mounted on the second mounting seat 410, the second mounting seat 410 is rotatably connected with the first mounting seat 300, and the position of the second mounting seat 410 after the horizontal rotation adjustment is locked through the first locking component 420, wherein the lock rod 422 of the first locking component 420 can be clamped with the lock disc 421, the lock disc 421 is provided with a plurality of circumferentially arranged lock grooves 4211, the lock disc 421 and the lock rod 422 are respectively arranged on the first mounting seat 300 and the second mounting seat 410, a user manually operates the lock rod 422 to make the protrusions 4221 on the lock rod 422 separate from the lock grooves 4211 to release the locking, and the second mounting seat 410 can be horizontally rotated and adjusted relative to the first mounting seat 300, so as to adjust the rotation positions of the seat cushion 110 and the backrest 120; after the adjustment is finished, the lock rod 422 is released, the lock rod 422 rebounds and resets under the elastic force of the first elastic piece 423, the protrusion 4221 on the lock rod 422 is in clamping fit with one lock groove 4211 on the lock disc 421 after the horizontal rotation adjustment, and the lock is locked again, so that the position after the horizontal rotation adjustment is ensured to be fixed.

It will be appreciated that the locking slots 4211 in the locking plate 421 may be provided as one, and when provided as one, the locking slots 4211 may extend in an arc or ring shape, so that locking is also achieved, but there is a possibility of looseness in the horizontal rotational direction.

It is understood that, as an alternative, the locking plate 421 may be disposed at the bottom of the second mounting seat 410, and the locking rod 422 is movably connected with the first mounting seat 300, so that the locking is also achieved.

In this embodiment, the seat further includes a lifting mechanism 500 and a third mounting seat 540, and the lifting mechanism 500 is disposed between the first mounting seat 300 and the third mounting seat 540 for lifting and adjusting the height position of the first mounting seat 300, and thus the height position of the seat cushion 110.

It is understood that the lifting mechanism 500 may be configured in different structures as required, such as a common pneumatic or pneumatic lifting structure.

Referring to fig. 5 and 6, in particular, in some embodiments, the lifting mechanism 500 includes a first swing link 510, a second swing link 520, and a first driving mechanism 530, one end of the first swing link 510 and one end of the second swing link 520 are respectively hinged to the first mounting seat 300, the other end of the first swing link 510 and the other end of the second swing link 520 are respectively hinged to the third mounting seat 540, the first swing link 510, the second swing link 520, the first mounting seat 300, and the third mounting seat 540 are arranged to form a parallelogram structure, and the first driving mechanism 530 drives the first swing link 510 or the second swing link 520 to rotate, so as to drive the first mounting seat 300 to lift. The lifting mode of the parallelogram structure can enable the first mounting base 300 to lift more stably, keep the first mounting base 300 horizontal and not incline, and in addition, the first mounting base 300 can generate certain displacement in the horizontal direction in the lifting process.

It can be understood that the first driving mechanism 530 drives the first swing link 510 or the second swing link 520 to rotate, which may adopt different structures as long as the driving can be realized, for example, referring to fig. 5, an electric push rod is adopted, the electric push rod is started by a handheld operator of the electric push rod, an output end of the electric push rod is hinged with the first swing link 510, and under the pushing action of the electric push rod, the first swing link 510 and the second swing link 520 rotate around respective pivots hinged with the third mounting seat 540, so as to drive the first mounting seat 300 to ascend and descend; referring to fig. 6, the electric push rod may drive the second swing link 520 to rotate; or a motor can be used to directly or indirectly drive the first swing link 510 or the second swing link 520 to rotate, and the driving can also be realized.

In this embodiment, the seat further includes a base 600, a third mounting seat 540 is slidably connected to the base 600, the third mounting seat 540 is horizontally slidably adjustable along the base 600, a second slide rail 610 is disposed on the base 600, and the third mounting seat 540 is slidably engaged with the second slide rail 610, so that the position of the third mounting seat 540 can be horizontally adjusted back and forth and moved back and forth, and then the front and back positions of the seat cushion 110 and the backrest 120 in the horizontal direction can be adjusted. The bottom of the base 600 is also provided with casters 620 with brakes, which is convenient for moving the whole seat.

Referring to fig. 7 and 8, in some embodiments, the chair further includes a second locking assembly 700, the second locking assembly 700 is used for locking the adjusted position of the third mounting seat 540 after the third mounting seat 540 moves horizontally, the second locking assembly 700 includes a first engaging element 710 and a second engaging element 720, the second engaging element 720 has an engaging portion 721, the engaging portion 721 is parallel to the horizontal sliding direction of the third mounting seat 540 (i.e. parallel to the second sliding rail 610), the length of the engaging portion 721 is not less than the stroke of the sliding adjustment, the first engaging element 710 and the engaging portion 721 are provided with teeth capable of being engaged with each other in a snap fit manner, corresponding to two racks being engaged, the first engaging element 710 is fixed on the third mounting seat 540, the second engaging element 720 is movably mounted on the base 600, specifically, one end of the second engaging element 720 is hinged to the base 600, and the engaging portion 721 of the second engaging element 720 has a third state in contact with the first engaging element 710 and a fourth state separated from the first engaging element 710. In the fourth state, the meshing part 721 of the second meshing element 720 disengages from the first meshing element 710, so that the third mounting seat 540 is unlocked, and the third mounting seat 540 can be slidably adjusted along the second sliding rail 610; in the third state, the engaging portion 721 of the second engaging element 720 and the first engaging element 710 are engaged with each other, thereby locking the position of the third mounting seat 540. The locking is performed by a rack-and-pinion method, and the position of the third mounting seat 540 can be arbitrarily locked within the stroke of the slide adjustment.

Further, the second locking assembly 700 further includes a second elastic member 730 and a foot rest 740, the second engaging member 720 is hinged to the base 600, the second elastic member 730 is used for providing a force for contacting and matching the first engaging member 710 and the second engaging member 720, the second elastic member 730 can be a spring and is in a stretching state, one end of the second elastic member 730 is connected to the second engaging member 720, and the other end is connected to the base 600; the pedal 740 has a pedal end 741 and a contact end 742 contacting the second engaging member 720, the pedal 740 is hinged to the base 600, the pedal end 741 can be stepped by a user to make the contact end 742 contact and lift the second engaging member 720, so that the engaging portion 721 is separated from the first engaging member 710, and then the position of the third mounting base 540 can be adjusted, after the adjustment is completed, the pedal 740 is released, and the engaging portion 721 of the second engaging member 720 is engaged and locked with the first engaging member 710 again under the pulling force of the second elastic member 730.

Referring to fig. 9, in the present embodiment, the seat further includes a backrest moving mechanism 800, the backrest moving mechanism 800 includes a first slide rail 810, a first slider 820 and a third locking element 830, the backrest 120 is mounted on the first slider 820, the first slide rail 810 is disposed on the second mounting seat 410, the first slider 820 is slidably connected to the first slide rail 810, so that the position of the backrest 120 on the second mounting seat 410 relative to the seat cushion 110 can be adjusted in a forward and backward sliding manner, and the third locking element 830 is used for locking and fixing the position of the first slider 820 on the first slide rail 810. Specifically, the third locking member 830 may employ a locking handle for easy operation, and the position of the first slider 820 is locked by screwing the locking handle.

Referring to fig. 10, in this embodiment, the seat further includes a backrest elevation angle adjusting mechanism 900, the backrest elevation angle adjusting mechanism 900 includes a fourth mounting seat 910 and an extensible member 920, the fourth mounting seat 910 is fixed on the first slider 820, the backrest 120 is hinged to the fourth mounting seat 910, a fixed end of the extensible member 920 is hinged to the fourth mounting seat 910, an extensible end of the extensible member 920 is hinged to the backrest 120, and the extensible end of the extensible member 920 is extensible to drive the backrest 120 to rotate and adjust. Specifically, the expansion piece 920 may be a gas spring, specifically a two-way self-locking gas spring, which is stable, reliable and convenient to operate, and has an operation rod 921, which is pulled to open the operation rod 921, and a release valve of the gas spring is started, so that the gas spring rod can be expanded and contracted at will in the expansion stroke, and the elevation angle of the backrest 120 can be changed steplessly; when the operating rod 921 is released, the gas spring automatically locks, and the elevation angle of the backrest 120 is locked accordingly, thereby achieving the effect of stepless adjustment of the elevation angle of the backrest 120.

Referring to fig. 11 and 12, in the present embodiment, the chair further includes an armrest 200, the armrest 200 has an angle adjustment function, the armrest 200 is connected to the backrest 120, the armrest 200 includes a fixing arm 210, a armrest rod 220 and a fourth locking element 230, the fixing arm 210 is fixedly connected to the backrest 120, the armrest rod 220 is rotatably connected to the fixing arm 210, the armrest rod 220 is provided with a plurality of first positioning holes 221 arranged circumferentially, the fixing arm 210 is provided with a second positioning hole, and the fourth locking element 230 is detachably inserted into the second positioning hole and one of the first positioning holes 221 to fix the angular position of the armrest 200 rod. The fixing arm 210 is provided with a limit post 240 for limiting the rotation angle limit of the handrail 220.

It is understood that the fourth locking element 230 may be a locking bolt (or a locking handle), the bolt may be pulled axially to pull out the first positioning hole 221, i.e. the handle bar 220 may be rotated, and after the bolt is rotated to the proper position, the bolt is released, and the bolt is inserted into the first positioning hole 221, so as to lock and fix the handle bar 220; or the fourth locking element 230 is a screw-type handle, and the handle is screwed out of the first positioning hole 221 to rotate the rod of the armrest 200, and after the handle is rotated to the right position, the handle is screwed into the first positioning hole 221 to lock the rod of the armrest 200.

In some embodiments, the backrest 120 and the seat cushion 110 are made of soft, moderate and breathable materials, and the shape of the backrest conforms to human engineering; the front end of the seat cushion 110 is saddle-shaped and is suitable for standing.

The chair of the embodiment has multiple functions, including six functions of horizontal rotation adjustment, height lifting adjustment, front-back movement adjustment, back 120 front-back position adjustment, back 120 elevation adjustment, armrest 200 angle adjustment and the like, thereby being applicable to users of various statures such as different heights. The horizontal rotation adjusting function can enable a user to go up and down the chair from the side, and is very reasonable and humanized; the height adjusting function is started through the handheld operator, automatic adjustment is realized, and the height adjusting function can be adjusted according to the situation even when a user sits on the seat, so that time and labor are saved, and the chair is very convenient; the seat of the embodiment can be used for rehabilitation training or fitness training, and can adapt to various training postures, such as: the chair is suitable for sitting posture and lying posture training through the 120 elevation angle adjusting function of the backrest; the backrest 120 is adjusted forward and backward to move the backrest 120 forward, and meanwhile, the seat saddle structure and the armrests 200 at the front end of the seat cushion 110 are matched, so that the chair is suitable for standing training.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A seat, comprising:

the cushion is used for a user to sit;

a backrest for a user to lean against;

a first mounting seat; and

the horizontal rotation adjusting mechanism comprises a second mounting seat and a first locking component, the seat cushion and the backrest are mounted on the second mounting seat, and the second mounting seat is rotatably connected with the first mounting seat; wherein,

the first locking assembly comprises a locking disc, a locking rod and a first elastic piece, at least one locking groove is circumferentially arranged on the locking disc, a protrusion used for being clamped and matched with the locking groove is arranged on the locking rod, the locking disc is arranged on the first mounting seat or the second mounting seat, correspondingly, the locking rod is movably connected with the second mounting seat or the first mounting seat, the first elastic piece is used for providing an acting force for enabling the locking rod to be in contact with the locking groove in a matched mode, the locking rod has a first state and a second state, and the protrusion on the locking rod is clamped with one of the locking grooves on the locking disc in the first state to fix the position of the second mounting seat; and in a second state, the protrusion on the lock rod is separated from the lock groove, so that the second mounting seat can be horizontally and rotatably adjusted relative to the first mounting seat.

2. The seat according to claim 1, wherein: the lock disc is arranged on the first installation seat, the bottom of the second installation seat is provided with a connection seat, the second installation seat is hinged to the lock rod through the connection seat, one end of the first elastic piece abuts against the bottom of the second installation seat, and the other end of the first elastic piece abuts against the lock rod.

3. The seat according to claim 1, wherein: the seat further comprises a lifting mechanism and a third mounting seat, wherein the lifting mechanism is arranged between the first mounting seat and the third mounting seat and used for lifting and adjusting the height position of the first mounting seat and further adjusting the height position of the cushion.

4. The seat according to claim 3, wherein: the lifting mechanism comprises a first oscillating bar, a second oscillating bar and a first driving mechanism, one end of the first oscillating bar and one end of the second oscillating bar are hinged to the first mounting seat respectively, the other end of the first oscillating bar and the other end of the second oscillating bar are hinged to the third mounting seat respectively, the first oscillating bar, the second oscillating bar, the first mounting seat and the third mounting seat are arranged to form a parallelogram structure, and the first driving mechanism is used for driving the first oscillating bar or the second oscillating bar to rotate.

5. The seat according to claim 3, wherein: the seat further comprises a base, the third mounting seat is connected with the base in a sliding mode, and the third mounting seat can be adjusted along the base in a horizontal sliding mode.

6. The seat according to claim 5, wherein: the seat further comprises a second locking assembly, the second locking assembly comprises a first tooth assembly and a second tooth assembly, the second tooth assembly is provided with a meshing part, the meshing part is parallel to the horizontal sliding direction of the third mounting seat, the first tooth assembly is provided with teeth which can be mutually clamped and matched, the first tooth assembly is fixed on the third mounting seat, the second tooth assembly is movably mounted on the base, the meshing part of the second tooth assembly is provided with a third state which is in contact fit with the first tooth assembly and is separated from the fourth state of the first tooth assembly.

7. The seat according to claim 6, wherein: the second locking component further comprises a second elastic piece and a pedal, the second meshing piece is hinged to the base, the second elastic piece is used for providing acting force for enabling the first meshing piece and the second meshing piece to be in contact fit, the pedal is provided with a pedal end and a contact end in contact with the second meshing piece, the pedal is hinged to the base, the pedal end can be stepped by a user, the contact end enables the second meshing piece to be lifted, and then the meshing portion is separated from the first meshing piece.

8. The seat according to claim 1, wherein: the seat further comprises a backrest moving mechanism, the backrest moving mechanism comprises a first slide rail, a first slide block and a third locking piece, the backrest is installed on the first slide block, the first slide rail is arranged on the second installation seat, the first slide block is in sliding connection with the first slide rail, and the third locking piece is used for locking and fixing the position of the first slide block on the first slide rail.

9. The seat according to claim 8, wherein: the seat further comprises a backrest elevation angle adjusting mechanism, the backrest elevation angle adjusting mechanism comprises a fourth mounting seat and a telescopic piece, the fourth mounting seat is fixed to the first sliding block, the backrest is hinged to the fourth mounting seat, the fixed end of the telescopic piece is hinged to the fourth mounting seat, the telescopic end of the telescopic piece is hinged to the backrest, and the telescopic end of the telescopic piece is telescopic and used for driving the backrest to be adjusted in a rotating mode.

10. The seat according to any one of claims 1 to 9, wherein: the seat further comprises handrails, the handrails are connected with the backrest, the handrails comprise a fixed arm, a handrail rod and a fourth locking piece, the handrail rod is connected with the fixed arm in a rotating mode, a plurality of first positioning holes are formed in the handrail rod in a circumferential mode, a second positioning hole is formed in the fixed arm, and the fourth locking piece is detachably connected with the second positioning holes and one of the first positioning holes in an inserting mode and used for fixing the angle position of the handrail rod.