CN213720903U - Seat activity support body and seat - Google Patents

Abstract

The utility model relates to a seat activity support body and seat. The seat movable frame body comprises a seat assembly and a mounting assembly, the seat assembly is used for bearing a user, and the mounting assembly comprises a fixed mounting piece; the middle transmission component is used for connecting the seat component and the mounting component; the middle transmission component comprises a first transmission piece, a second transmission piece and a third transmission piece, wherein the first end of the first transmission piece and the first end of the second transmission piece are respectively hinged to the seat component, the second end of the first transmission piece and the second end of the second transmission piece are respectively hinged to the mounting component, and the two ends of the third transmission piece are respectively hinged to the first transmission piece and the mounting component; the middle transmission component further comprises a fourth transmission component, two ends of the fourth transmission component are hinged to the third transmission component and the second transmission component respectively, and the fourth transmission component, the mounting component, the second transmission component and the third transmission component form a swing stopping mechanism.

Description

Seat activity support body and seat

Technical Field

The utility model relates to a chair technical field especially relates to a seat activity support body and seat.

Background

The seat that can adjust user's position of sitting is available in the market at present, and the seat activity support body of this kind of seat can move under drive assembly's drive and form conventional position of sitting, leisure appearance and three kinds of user states of lying to realize the diversification of seat function.

When the existing seat capable of adjusting the sitting posture is switched among different sitting postures, the seat assembly and the seat support thereof have large rotation amplitude relative to ground lifting, a user can obviously feel the movement of body weight and mind relative to the ground on the seat support, particularly, the seat assembly stretches out the process to the front of the user, the seat support rotates relative to the ground lifting and can drive the whole body of the user to lean backwards, the unreliable sense of the unbalance of the lean backwards can be brought to the user, and the comfort experience of the user can be reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for an improved seat activity frame and a seat.

The utility model provides a movable frame body of a seat, which comprises a seat component and an installation component, wherein the seat component is used for bearing a user, and the installation component comprises a fixed installation part; the middle transmission component is used for connecting the seat component and the mounting component; the middle transmission component comprises a first transmission piece, a second transmission piece and a third transmission piece, wherein the first end of the first transmission piece and the first end of the second transmission piece are respectively hinged to the seat component, the second end of the first transmission piece and the second end of the second transmission piece are respectively hinged to the mounting component, and the two ends of the third transmission piece are respectively hinged to the first transmission piece and the mounting component; the middle transmission component further comprises a fourth transmission component, two ends of the fourth transmission component are hinged to the third transmission component and the second transmission component respectively, and the fourth transmission component, the mounting component, the second transmission component and the third transmission component form a swing stopping mechanism.

In one embodiment, the third transmission piece comprises a first connecting part and a second connecting part which are fixed relatively, the end part of the first connecting part relatively far away from the second connecting part is hinged with the first transmission piece, and the end part of the second connecting part relatively far away from the first connecting part is hinged with the mounting assembly; the fourth transmission piece is hinged between the first connecting portion and the second connecting portion.

In one embodiment, the second transmission member comprises a first connecting section and a second connecting section which are fixed relatively, the end of the first connecting section relatively far away from the second connecting section is hinged with the seat assembly, and the end of the second connecting section relatively far away from the first connecting section is hinged with the mounting assembly; the fourth transmission piece is hinged between the first connecting section and the second connecting section.

In one embodiment, the seat assembly is movably connected to the intermediate transmission assembly, the seat assembly includes a seat support portion, the seat support portion has a length of 535mm to 560 mm; or the length of the seat supporting part is 690 mm-710 mm; the seat supporting part is arranged obliquely relative to the plane of the ground when the seat movable frame body is arranged on the ground.

In one embodiment, the seat assembly has an extended condition relatively distal from the fixed mount and a stowed condition relatively proximal to the fixed mount; the middle transmission component and the mounting component form an extension connecting mechanism, the mounting component drives the middle transmission component to move towards a first direction and to be far away from the fixed mounting component so as to enable the extension connecting mechanism to move in an extension mode, and the mounting component drives the middle transmission component to move towards a second direction and to be close to the fixed mounting component so as to enable the extension connecting mechanism to move in a furling mode; the extension connecting mechanism drives the seat assembly to switch from a folded state to an extended state through extension movement, and drives the seat assembly to switch from the extended state to the folded state through folding movement.

In one embodiment, the angle of inclination of the seat support relative to the plane of the ground in the stowed condition is between 6 ° and 9 °, and the angle of inclination of the seat support relative to the plane of the ground in the extended condition is between 11 ° and 13 °.

So set up, the pendulum stopping mechanism can limit the seat supporting part at the position of sitting switching in-process for the rotation lifting volume on ground within 2 ~ 7 within ranges, therefore the rotation of seat supporting part for ground can not drive user's shank or buttock and rotate for ground by a wide margin, is favorable to guaranteeing the relatively stable of user's focus position, and the motion of seat support for ground is close the translation more.

In one embodiment, the mounting assembly further includes a first swing link and a second swing link, two ends of the first swing link are respectively hinged to the first transmission member and the fixed mounting member, two ends of the second swing link are respectively hinged to the third transmission member and the fixed mounting member, and the second swing link is hinged to the second transmission member.

So set up, the installation component drives the extension of middle drive assembly or draws in the motion through the syntropy swing of first pendulum rod and second pendulum rod.

In one embodiment, the seat assembly comprises a first rocker, a second rocker, a seat support and a sliding connecting rod, wherein two ends of the first rocker are respectively hinged with the seat support and the sliding connecting rod; the first rocker, the second rocker, the seat support and the sliding connecting rod form a seat mechanism.

By the arrangement, the seat mechanism has a determined movement track, and after a user adjusts the sitting posture for multiple times, the movement of the seat assembly at each time can be kept consistent.

In one embodiment, the seat movable frame body further comprises a leg rest mechanism, and the leg rest mechanism is hinged to the seat assembly and hinged to the intermediate transmission assembly; the leg rest mechanism can be driven by the intermediate transmission assembly to move in an extending mode relative to the seat assembly along a first direction or move in a retracting mode relative to the seat assembly along a second direction.

The utility model also provides a seat, including base and foretell seat activity support body, seat activity support body passes through fixed mounting spare and base fixed connection.

The utility model provides a seat activity support body and seat has the pendulum stopping mechanism of confirming the movement track through the setting, can be in switching seat subassembly position of sitting state in-process, restriction seat subassembly and seat support for ground lifting or push down wobbling range. The motion of seat support more is close translational motion, and the seat supporting part can not drive user's shank or buttock for the rotation by a wide margin on ground for the planar rotation volume in ground place, is favorable to guaranteeing the relative stability of user's focus position, eliminates the unreliable impression that the user produced because of the health is facing back in the use, promotes comfortable nature and experiences.

Drawings

Fig. 1 is a schematic view of a seat movable frame in a folded state according to a first embodiment of the present invention;

fig. 2 is a schematic view of a seat movable frame in a quasi-extending state according to a first embodiment of the present invention;

fig. 3 is a schematic view of a seat movable frame body according to a first embodiment of the present invention in an extended state;

fig. 4 is a schematic view of a movable frame of a seat according to a second embodiment of the present invention in a folded state;

fig. 5 is a schematic view of a movable frame of a seat according to a second embodiment of the present invention in a quasi-extended state;

fig. 6 is a schematic view of a movable frame of a seat according to a second embodiment of the present invention in an extended state.

Description of reference numerals:

100. a movable frame body of the seat; 11. a first rocker; 12. a second rocker; 13. a seat support; 131. a seat support; 132. a backrest support; 14. a sliding connecting rod; 21. a first swing link; 22. a second swing link; 23. a fixed mounting; 31. a first transmission member; 32. a second transmission member; 33. a third transmission member; 331. a first connection portion; 332. a second connecting portion; 34. a fourth transmission member; 40. a backrest assembly; 50. a leg rest mechanism; 60. a drive assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

There is a class of seats capable of adjusting the sitting posture of a user in the market at present, and seat components of the class of seats can move under the driving of a driving component 60 to form three using states of a conventional sitting posture, a leisure posture and a lying posture so as to realize the diversification of the functions of the seats. During the switching of the seat assembly from the regular sitting posture to the leisure posture and further to the lying posture, the back of the user is gradually pressed down to lie flat while the seat support 13 for supporting the legs and buttocks of the user in the seat assembly is protruded in a direction close to the feet of the user.

The utility model provides a seat activity support body 100 and have the seat of support body, seat activity support body 100 are as the motion and the supporting framework of seat, including the seat subassembly that is used for bearing user's health to and can be used to with seat base fixed connection's installation component, the base is used for supporting the weight of whole seat.

The utility model discloses an in the embodiment one, the quantity of seat activity support body 100 is two to the symmetry sets up, connects through first linkage between two sets of seat subassemblies, and when one of them seat subassembly moved, another seat subassembly can synchronous motion thereupon, and then two sets of seat activity support bodies 100 can realize synchronous motion.

Further, the seat further comprises a driving assembly 60, the driving assembly 60 preferably adopts a screw motor, and the screw motor comprises a motor housing connected to the base and a screw rod capable of telescopically moving in the motor housing and movably connected with the seat assembly. Specifically, motor casing is articulated through the U-shaped seat that sets firmly in the base with the base, and the tip that the base was kept away from to the lead screw is articulated with the U-shaped seat that sets firmly in first linkage. The screw rod motor drives the seat assembly to switch among a conventional sitting posture state, a leisure posture state and a lying posture state through the telescopic motion of the screw rod, and therefore a user can adjust the sitting posture in an electric control driving mode.

It is understood that the driving assembly 60 is not essential to the present invention, and in other embodiments, the seat may not be provided with the driving assembly 60, and the user may adjust the movement state of the seat assembly by manual driving, i.e. manually adjust the sitting posture. The present invention does not limit the power input source and power input mode of the seat frame 100.

For convenience of description, in the following embodiments, the seat is provided with a driving assembly 60 in driving connection with the seat assembly, and the seat activity frame 100 is driven to move by the driving assembly 60 in a telescopic driving manner. The description of other driving methods is not repeated, and the following description should not be construed as limiting the form of the power source of the seat frame 100.

When the existing seat capable of adjusting the sitting posture is switched among different sitting postures, the seat assembly and the seat support thereof have large rotation amplitude relative to ground lifting, a user can obviously feel the movement of body weight and mind relative to the ground on the seat support, particularly, the seat assembly stretches out the process to the front of the user, the seat support rotates to drive the whole body of the user to lean backwards relative to the ground lifting, the unreliable feeling of the unbalance of the lean backwards can be brought to the user, and the comfort experience of the user can be reduced.

In view of this, the utility model provides a seat activity support body 100 still includes the intermediate drive subassembly that is used for connecting seat chair subassembly and installation component to the intermediate drive subassembly forms the extension coupling mechanism that can drive the motion of seat chair subassembly with the installation component jointly.

The intermediate transmission assembly forms a swing stop mechanism with a determined motion trajectory, which is capable of limiting the amplitude of the lifting rotation of the seat assembly and the seat support 13 relative to the ground. When the user adjusts the sitting posture and makes the back lean backwards and downwards, the buttocks and the legs cannot rotate greatly relative to the ground, so that the relative stability of the gravity center position of the user relative to the ground or the base is ensured.

It should be noted that the swing stop mechanism of the present invention is used to limit the range of the angle of the seat assembly and the seat support 13 rotating relative to the ground during the movement of the seat activity frame 100, rather than an absolute limit of the angle between the ground and the seat assembly or the seat support 13.

Please refer to fig. 1 to 3. Fig. 1 is a schematic view of a seat movable frame 100 according to a first embodiment of the present invention in a folded state; fig. 2 is a schematic view of a seat movable frame 100 according to a first embodiment of the present invention in a quasi-extension state; fig. 3 is a schematic view of a seat activity frame 100 according to a first embodiment of the present invention in an extended state.

In the first embodiment of the present invention, in addition to the seat support 13, the seat assembly further includes a first rocker 11, a second rocker 12 and a sliding connecting rod 14. The seat support 13 is integrally in the shape of a rectangular parallelepiped beam plate; two ends of the first rocking bar 11 are respectively hinged with the seat support 13 and the sliding connecting rod 14, and two ends of the second rocking bar 12 are respectively hinged with the seat support 13 and the sliding connecting rod 14. The first rocker 11, the second rocker 12, the seat support 13 and the sliding link 14 form a seat mechanism.

Specifically, the seat frame 13 includes a seat support portion 131 and a backrest support portion 132 fixed to each other, the seat support portion 131 is used for contacting and carrying the legs and buttocks of the user, and the backrest support portion 132 is disposed at one end of the seat support portion 131 relatively far away from the feet of the user, and is used for providing support for the waist of the user and providing an installation position for the backrest assembly 40. In the first embodiment, the length of the seat supporting portion 131 is 535mm to 560mm, and when the seat frame body 100 is placed on the ground, that is, the base is fixed relative to the ground, the seat supporting portion 131 is disposed to be inclined relative to the plane on which the ground is located.

Under the size range, the seat supporting part 131 can provide enough leg supporting area, so that the defect of insufficient comfort of a user caused by short length of the seat support 13 in the existing similar products is overcome, particularly, when the seat assembly is in a normal sitting posture state, the leg of the user cannot be completely supported by the seat supporting part 131, and one end of the seat supporting part 131 close to the foot of the user extrudes the leg of the user, so that the comfort is affected.

The mounting assembly comprises a first swing rod 21, a second swing rod 22 and a fixed mounting part 23, wherein the fixed mounting part 23 is a rod-shaped member and is used for being fixedly connected with a base in the seat; one end of the first swing link 21 and one end of the second swing link 22 are hinged to the fixed mounting member 23.

The intermediate transmission assembly includes a first transmission member 31, a second transmission member 32, a third transmission member 33 and a fourth transmission member 34. The first end of the first transmission piece 31 and the first end of the second transmission piece 32 are respectively hinged to two ends of the sliding connecting rod 14, two ends of the third transmission piece 33 are respectively hinged to the first transmission piece 31 and the second swing rod 22 in the installation component, and two ends of the fourth transmission piece 34 are respectively hinged to the third transmission piece 33 and the second transmission piece 32, so that the seat component and the middle transmission component are movably connected.

Specifically, a hinge point of the third transmission member 33 and the first transmission member 31 is located between a hinge point of the first transmission member 31 and the sliding connection rod 14 and a hinge point of the first transmission member 31 and the first swing link 21; the second transmission member 32 includes a first connection section and a second connection section that are relatively fixed, an end portion of the first connection section relatively far from the second connection section is hinged to the sliding connection rod 14, and the fourth transmission member 34 is hinged between the first connection section and the second connection section, that is, a hinge point between the fourth transmission member 34 and the second transmission member 32 is located between a hinge point between the second transmission member 32 and the sliding connection rod 14 and a hinge point between the second transmission member 32 and the second swing link 22.

The third transmission piece 33 includes a first connection portion 331 and a second connection portion 332 that are fixed relatively, an end portion of the first connection portion 331 relatively far away from the second connection portion 332 is hinged to the first transmission piece 31, an end portion of the second connection portion 332 relatively far away from the first connection portion 331 is hinged to an end portion of the second swing link 22 relatively far away from the fixed mounting portion 23, that is, a hinge point of the second swing link 22 and the second transmission piece 32 is located between a hinge point of the fixed mounting portion 23 and the second swing link 22 and a hinge point of the third transmission piece 33 and the second swing link 22.

Further, in the first embodiment, the seat activity frame 100 further includes a leg rest mechanism 50 and a backrest assembly 40. The leg rest mechanism 50 is hinged with the seat component and is hinged with the middle transmission component; the footrest mechanism 50 can move along with the overall movement of the seat movable frame body 100, and when the seat assembly is in a normal sitting posture state, the footrest mechanism 50 is folded and closed to the seat assembly; when the seat assembly is in the leisure posture and the lying posture state, the leg rest mechanism 50 extends and moves in the direction away from the seat assembly, and a leg rest support part is formed at one end away from the seat assembly, and when the seat is placed on a level ground, the vertical height of the leg rest support part is not lower than the highest vertical height of the seat support 13.

The backrest assembly 40 comprises a backrest element, a first, a second and a third backrest link, the backrest element being hinged to the backrest support portion 132 for providing support to the back and waist of a user, forming a backrest angle with the seat support 13; two ends of the first back connecting rod are respectively hinged with the back component and the second back connecting rod, the second back connecting rod is arranged between the first back connecting rod and the third back connecting rod, and two ends of the third back connecting rod are respectively hinged with the second back connecting rod and the fixed connecting rod. In the course of the seat assembly changing from the normal sitting position to the leisure position and then to the recumbent position, the backrest angle between the seat support 13 and the backrest element increases.

The extending linkage is capable of effecting a guided movement of the seat assembly upon actuation of the drive assembly 60. Specifically, when the screw rod of the screw rod motor extends out of the motor housing, the mounting assembly drives the middle rotating assembly to move towards a first direction through the first swing link 21 and the second swing link 22, namely, when a user normally sits on the seat support 13, the user moves forwards under the visual angle and is far away from the fixed mounting part 23; meanwhile, the intermediate transmission assembly drives the seat assembly to move away from the fixed mounting part 23 towards the first direction. The extending connection mechanism extends and moves relative to the base.

When a screw rod of the screw rod motor contracts into the motor shell, the mounting component drives the intermediate transmission component to move towards a second direction, namely the direction opposite to the first direction, through the first swing rod 21 and the second swing rod 22 and is close to the fixed mounting component 23; meanwhile, the middle transmission component drives the seat component to move towards the second direction close to the fixed mounting part 23, the extending connection mechanism folds relative to the base, and the middle transmission component and the mounting component are overlapped gradually when viewed from the side part of a user.

The seat assembly has an extended condition relatively away from the fixed mounting member 23, a retracted condition relatively close to the fixed mounting member 23, and a quasi-extended condition between the extended and retracted conditions during movement with the extension linkage and during movement of the seat assembly itself. The folding state, the quasi-stretching state and the stretching state respectively correspond to three using states of a conventional sitting posture, a leisure posture and a lying posture of the seat component in sequence.

In the folded state, the entire seat frame 100 occupies the smallest space, and when the seat frame 100 is viewed from the side of a user who normally rests on the seat support 13, the seat assembly, the intermediate transmission assembly, and the mounting assembly are covered or overlapped, and the leg rest mechanism 50 is folded and closed to the seat assembly; the seat assembly as a whole is closer to the fixed mount 23 than in the quasi-extended or extended state described below.

In the quasi-extension state, the whole occupied space of the seat frame 100 is larger than that in the folding state, and when the seat frame 100 is viewed from the side of the user who is resting on the seat frame 13, the intermediate transmission assembly and the seat assembly move in the first direction, i.e., toward the front of the user, or the fixed mounting member 23 points to the direction of the foot of the user relative to the side of the fixed mounting member 23 and away from the fixed mounting member 23. Compared with the folded state, the first swing link 21 and the second swing link 22 both rotate relative to the fixed mounting part 23 and drive the end parts of the two relatively far away from the fixed mounting part 23 to move towards the first direction, and at this time, the stretching connection mechanism is in an incomplete unfolding state.

In the extended state, the space occupied by the entire seat frame 100 is further increased from the quasi-extended state, and when the seat frame 100 is viewed from the side of the user who is resting on the seat frame 13, the intermediate transmission assembly seat assembly moves further in the first direction than in the quasi-extended state, and further moves away from the fixed attachment 23. Compared with the quasi-stretching state, the first swing link 21 and the second swing link 22 further rotate relative to the fixed mounting part 23, and further drive the end parts of the first swing link and the second swing link, which are relatively far away from the fixed mounting part 23, to move towards the first direction, and at this time, the stretching connection mechanism is in a fully-stretching state.

The stretching connecting mechanism drives the seat assembly to be switched from a folding state to a quasi-stretching state through stretching movement, and further to be switched to a stretching state; or the seat assembly is driven to be switched from the stretching state to the quasi-stretching state through the furling movement, and further switched to the furling state.

During the switching of the seat assembly from the folded state to the quasi-extended state and further to the extended state, the inclination angle of the seat support portion 131 with respect to the plane of the ground tends to increase. In the stowed state, the seat support 131 is inclined at an angle of 6 to 9 ° relative to the ground plane; in the extended state, the seat support portion 131 is inclined at an angle of 11 ° to 13 ° with respect to the ground plane. In other words, the seat support portion 131 is always inclined with respect to the ground plane during the movement of the seat frame 100, and the inclination direction is not changed. The end of the seat holder 13 in the first direction is higher than the end thereof in the second direction, i.e., the opposite side to the first direction. In the process of changing the seat assembly from the normal sitting position to the leisure position and then to the lying position, the lifting amount of the seat support 131 relative to the ground plane is 2 to 7 degrees.

The first rocker 11, the second rocker 12, the seat support 13 and the sliding connecting rod 14 form a seat mechanism with a determined motion track; the second connecting portion 332 of the fourth transmission member 34 and the third transmission member 33, the second transmission member 32 and the second swing link 22 form a swing stopping mechanism, which is a four-bar linkage mechanism with a certain motion track.

Please refer to fig. 4 to 6. Fig. 4 is a schematic view of a seat movable frame 100 according to a second embodiment of the present invention in a folded state; fig. 5 is a schematic view of a second embodiment of the present invention, showing a seat movable frame 100 in a quasi-extended state; fig. 6 is a schematic view of a seat activity frame 100 according to a second embodiment of the present invention in an extended state.

The seat activity frame body 100 of the second embodiment is basically the same as the seat activity frame body 100 of the first embodiment, except that the length of the seat supporting part 131 in the second embodiment is 690-710 mm, which is further longer than that in the first embodiment, so as to meet the requirements of more people. In particular, the lengthened seat support portion 131 not only provides a larger support area for the user, but also forms a space for placing a support between the back of the user and the backrest module 40, thereby avoiding a smaller effective leg support area after placing the support due to a shorter length of the seat support portion 131.

The utility model provides a seat activity support body 100 has the pendulum stopping mechanism of confirming the movement track through the setting, can be in switching seat subassembly position of sitting state in-process, and restriction seat subassembly and seat support 13 are for ground lifting or push down wobbling range. When the sitting posture state of the seat assembly is switched, the rotation amount of the seat supporting part 131 relative to the ground plane does not drive the legs or the buttocks of the user to rotate greatly relative to the ground, so that the relative stability of the gravity center position of the user is favorably ensured, and the movement of the seat support 13 relative to the ground is closer to translation. Furthermore, the arrangement of the anti-sway mechanism does not completely define the angle of the seat assembly and the seat bracket 13 relative to the ground. In the process of switching the seat assembly from the folded state to the extended state, the lifting and rotating of the seat supporting portion 131 relative to the ground plane can play a role of guiding the user to fall back to the side where the backrest supporting portion 132 is located until the back of the user contacts the backrest supporting portion 132, so as to eliminate the gap between the waist of the user and the backrest supporting portion 132, thereby improving the supporting effect on the waist of the user and realizing the sufficient support of the seat supporting portion 131 on the user.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims (10)

1. A seat frame comprising a seat assembly for carrying a user, a mounting assembly comprising a fixed mounting (23); the seat is characterized by further comprising an intermediate transmission assembly used for connecting the seat assembly and the mounting assembly;

the middle transmission component comprises a first transmission piece (31), a second transmission piece (32) and a third transmission piece (33), the first end of the first transmission piece (31) and the first end of the second transmission piece (32) are respectively hinged to the seat component, the second end of the first transmission piece (31) and the second end of the second transmission piece (32) are respectively hinged to the mounting component, and two ends of the third transmission piece (33) are respectively hinged to the first transmission piece (31) and the mounting component;

the middle transmission component further comprises a fourth transmission component (34), two ends of the fourth transmission component (34) are respectively hinged to the third transmission component (33) and the second transmission component (32), and the fourth transmission component (34) and the mounting component, the second transmission component (32) and the third transmission component (33) form a swing stopping mechanism.

2. The seat frame according to claim 1, wherein the third transmission member (33) comprises a first connecting portion (331) and a second connecting portion (332) which are fixed relatively, an end portion of the first connecting portion (331) relatively far away from the second connecting portion (332) is hinged with the first transmission member (31), and an end portion of the second connecting portion (332) relatively far away from the first connecting portion (331) is hinged with the mounting assembly; the fourth transmission piece (34) is hinged between the first connecting part (331) and the second connecting part (332).

3. A seat frame according to claim 1 or 2, wherein the second transmission member (32) comprises a first connecting section and a second connecting section which are relatively fixed, the end of the first connecting section relatively far away from the second connecting section is hinged with the seat assembly, and the end of the second connecting section relatively far away from the first connecting section is hinged with the mounting assembly; the fourth transmission piece (34) is hinged between the first connecting section and the second connecting section.

4. The seat frame of claim 1, wherein the seat assembly is movably connected to the intermediate transmission assembly, the seat assembly includes a seat support portion (131), and the seat support portion (131) has a length of 535mm to 560 mm; or the length of the seat supporting part (131) is 690-710 mm;

the seat supporting part (131) is arranged obliquely relative to the plane of the ground when the seat movable frame body is arranged on the ground.

5. A seat frame according to claim 4, wherein the seat assembly has an extended condition relatively remote from the fixed mounting (23) and a collapsed condition relatively close to the fixed mounting (23);

the intermediate transmission assembly and the mounting assembly form an extension connecting mechanism, the mounting assembly drives the intermediate transmission assembly to move towards a first direction and far away from the fixed mounting piece (23) so as to enable the extension connecting mechanism to move in an extension manner, and the mounting assembly drives the intermediate transmission assembly to move towards a second direction and close to the fixed mounting piece (23) so as to enable the extension connecting mechanism to move in a folding manner;

the extension connecting mechanism drives the seat assembly to be switched from the folded state to the extended state through the extension motion, and drives the seat assembly to be switched from the extended state to the folded state through the folding motion.

6. The seat frame according to claim 5, wherein in the folded state, the angle of inclination of the seat support (131) relative to the plane of the ground is between 6 ° and 9 °, and in the extended state, the angle of inclination of the seat support (131) relative to the plane of the ground is between 11 ° and 13 °.

7. The seat activity frame body of claim 1, characterized in that, the mounting assembly further comprises a first swing link (21) and a second swing link (22), two ends of the first swing link (21) are respectively hinged to the first transmission member (31) and the fixed mounting member (23), two ends of the second swing link (22) are respectively hinged to the third transmission member (33) and the fixed mounting member (23), and the second swing link (22) is hinged to the second transmission member (32).

8. The seat activity frame according to claim 1, wherein the seat assembly comprises a first rocker (11), a second rocker (12), a seat support (13) and a sliding connecting rod (14), two ends of the first rocker (11) are respectively hinged with the seat support (13) and the sliding connecting rod (14), two ends of the second rocker (12) are respectively hinged with the seat support (13) and the sliding connecting rod (14), and two ends of the sliding connecting rod (14) are respectively hinged with the first transmission piece (31) and the second transmission piece (32); the first rocker (11), the second rocker (12), the seat support (13) and the sliding connecting rod (14) form a seat mechanism.

9. The seat frame of claim 1, further comprising a leg rest mechanism (50), wherein the leg rest mechanism (50) is hinged to the seat assembly and to the intermediate transmission assembly; the footrest mechanism (50) can be driven by the intermediate transmission assembly to move in an extending mode relative to the seat assembly along a first direction or move in a retracting mode relative to the seat assembly along a second direction.

10. A seat comprising a base and a seat frame according to any one of claims 1 to 9, said seat frame being fixedly connected to said base by said fixed mounting member (23).

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