CN220988194U

CN220988194U - Seat frame and seat unit

Info

Publication number: CN220988194U
Application number: CN202322786997.5U
Authority: CN
Inventors: 蔡赛军; 王海波; 李晓鸿; 江伟良
Original assignee: Ruimai Technology Co ltd
Current assignee: Ruimai Technology Co ltd
Priority date: 2023-10-17
Filing date: 2023-10-17
Publication date: 2024-05-24
Anticipated expiration: 2033-10-17

Abstract

The utility model provides a seat frame and a seat unit, wherein the seat frame comprises: a mounting; a backrest frame; a seat frame which can move in the front-rear direction of the seat frame; the adjusting mechanism is arranged between the seat frame and comprises a backrest adjusting rod, the backrest adjusting rod is provided with a first end and a second end, the first end is arranged closer to the seat frame than the second end, in the longitudinal direction, the second end is higher than the first end, and the backrest frame is arranged on the backrest adjusting rod; when the seat frame moves towards the front of the seat frame, the first end and the second end can both move downwards towards the front of the seat frame along the longitudinal direction, the moving distance of the first end is larger than that of the second end in the direction towards the front of the seat frame, and the moving distance of the first end is smaller than that of the second end in the direction along the longitudinal direction. The utility model has simple structure, and can well prolong the sitting depth in the lying state, thereby effectively increasing the length of the seat part of the seat unit.

Description

Seat frame and seat unit

Technical Field

The utility model relates to the technical field of furniture, in particular to a seat frame and a seat unit.

Background

The functional seat can be subjected to posture adjustment, so that different structural states can be presented under different postures to meet the use requirement of consumers. Common functional chairs generally have a sitting posture and a lying posture, in which the existing functional chair is extended through a stowable footrest to achieve an extension of the length of the seat portion to support the lower limbs of the consumer in a lying state while the backrest reclines to support the upper limbs of the consumer in a lying state. But the foot rest structure that current function seat set up can occupy the seat unit below space in a large number on the one hand, is unfavorable for cleaning of seat unit below, and on the other hand its structure is complicated, and back and foot rest linkage are difficult, have increased the fault rate of seat unit to a certain extent.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model aims to provide a seat frame which has simple structure, small occupied space below and low failure rate.

Another object of the present utility model is to provide a seat unit, which can achieve convenient and rapid posture adjustment, and in which the backrest portion can well extend the seat portion in a recumbent state, thereby providing a better use experience for consumers.

The embodiment of the utility model is realized by the following technical scheme:

A seat frame, comprising: a mounting; a backrest frame; a seat frame provided to the mount, the seat frame being movable in a front-rear direction of the mount; the adjusting mechanism is adjustably arranged between the seat frame and comprises a backrest adjusting rod, the backrest adjusting rod is provided with a first end and a second end, the first end is arranged closer to the seat frame than the second end, the second end is higher than the first end in the longitudinal direction, and the backrest frame is arranged on the backrest adjusting rod; when the seat frame moves towards the front of the seat frame, the first end and the second end can move downwards towards the front of the seat frame along the longitudinal direction, the moving distance of the first end is larger than that of the second end in the direction towards the front of the seat frame, and the moving distance of the first end is smaller than that of the second end in the direction along the longitudinal direction; when the seat frame moves towards the rear of the seat frame, the first end and the second end can both move towards the rear of the seat frame and longitudinally upwards, and the moving distance of the first end is larger than that of the second end in the direction towards the rear of the seat frame, and the moving distance of the first end is smaller than that of the second end in the longitudinally upwards direction.

According to a preferred embodiment, the adjusting mechanism comprises a driving rod, a follower rod and a supporting rod, wherein: the driving rod is pivotally connected to the seat frame, the connection point between the driving rod and the seat frame is a first pivot point, the follow-up rod is pivotally connected to the seat frame, the connection point between the driving rod and the follow-up rod is a second pivot point, one end of the backrest adjusting rod is pivotally connected to the driving rod, the connection point between the backrest adjusting rod and the seat frame is a third pivot point, the other end of the backrest adjusting rod is pivotally connected to the follow-up rod, the connection point between the backrest adjusting rod and the backrest adjusting rod is a fourth pivot point, one end of the supporting rod is pivotally connected to the driving rod, the connection point between the supporting rod and the follow-up rod is a fifth pivot point, the other end of the supporting rod is pivotally connected to the follow-up rod, and the connection point between the backrest adjusting rod and the follow-up rod is a sixth pivot point; the first pivot point is located between the third pivot point and the fifth pivot point, the sixth pivot point is located between the fourth pivot point and the second pivot point, the third pivot point is located at the first end, and the fourth pivot point is located at the second end on the backrest adjustment rod.

According to a preferred embodiment, the seat frame comprises a main body part and a connecting part which are connected with each other, wherein the connecting part is arranged near one side of the rear of the seat frame and extends towards the rear of the seat frame; the driving rod is pivotally connected to the connecting part, and the connecting point between the driving rod and the connecting part is the first pivot point.

According to a preferred embodiment, the first pivot point is lower than the body portion in the longitudinal direction.

According to a preferred embodiment, the connecting portion is provided with a first limiting shaft, and the driving rod is abutted to the first limiting shaft when the seat frame moves to a limit position towards the front of the seat frame.

According to a preferred embodiment, a second limiting shaft and a third limiting shaft are arranged on the follower rod, the sixth pivot point is located between the second limiting shaft and the third limiting shaft, and the second limiting shaft is located between the fourth pivot point and the sixth pivot point; when the seat frame moves to the limit position towards the rear of the seat frame, the backrest adjusting rod is abutted to the second limit shaft, and the supporting rod is abutted to the third limit shaft.

According to a preferred embodiment, a fourth limiting shaft and a fifth limiting shaft are arranged on the seat frame, and the second pivot point is located between the fourth limiting shaft and the fifth limiting shaft; when the seat frame moves to the limit position towards the front of the seat frame, the follow-up rod is abutted to the fourth limit shaft; when the seat frame moves to the limit position towards the rear of the seat frame, the follow-up rod is abutted to the fifth limit shaft.

According to a preferred embodiment, the seat frame is slidably connected to the seat frame.

According to a preferred embodiment, the seat frame is provided with a sliding rail part, and the sliding rail part extends along the front and rear directions of the seat frame; the seat frame is provided with a sliding block part matched with the sliding rail part.

According to a preferred embodiment, the sliding rail part comprises a first main body plate, two first guard plates are longitudinally arranged on the first main body plate at intervals, first baffle plates are arranged at the tail ends of the first guard plates, and the two first baffle plates extend in opposite directions; the sliding block part comprises a second main body plate, two second guard plates are longitudinally arranged on the second main body plate at intervals, the second guard plates at least partially extend into the area between the first main body plate and the first baffle, and in the direction of the first main body plate opposite to the first baffle, the second guard plates are limited by the first main body plate and the corresponding second baffle; the seat frame is connected to a second body panel, with a first panel connected to the seat frame.

According to a preferred embodiment, the seat frame further comprises a first fixing plate, and the seat frame is mounted to the second body plate through the first fixing plate.

According to a preferred embodiment, the seat frame further includes a driving member mounted between the seat frame and the seat frame or the adjusting mechanism for driving the seat frame to move in the front-rear direction of the seat frame.

A seating unit comprising a seat cushion, a back rest, and the aforementioned seat frame, wherein: the seat cushion is assembled to the seat frame to constitute a seat portion, and the backrest is assembled to the backrest frame to constitute a backrest portion.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

The backrest frame is linked with the seat frame and synchronously moves under the condition of driving by the same driving piece through the adjusting mechanism, has a simple structure, and can effectively reduce the failure rate of the seat frame, namely the seat unit; in addition, in the posture adjustment process of the seat frame, the seat frame is always positioned above the seat frame, so that the space below the seat frame, namely the seat unit, is conveniently released, and the bottom surface of a corresponding area is conveniently cleaned; the backrest frame integrally presents a movement gesture of moving forwards and overturning backwards along with the backrest adjusting rod, so that the backrest part of the seat unit can well prolong the length of the seat part under the lying gesture, the seat unit can better provide a supporting function for consumers under the lying gesture, meanwhile, the friction feeling of the backrest part to the backs of the consumers can be reduced in the gesture adjusting process of the seat unit, and the minimum gap between the backrest part and the wall behind the seat unit or other objects is basically unchanged, so that zero wall leaning of the seat unit is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic elevational view of a seat frame in a sitting position according to an embodiment of the present utility model;

fig. 2 is a schematic view of a first perspective structure of a seat frame in a sitting posture according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a second perspective view of a seat frame in a sitting position according to an embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of a portion of the structure shown at A in FIG. 3;

FIG. 5 is a schematic front view of a seat frame in a recumbent position according to an embodiment of the present utility model;

fig. 6 is a schematic perspective view of a seat frame in a lying posture according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a structure of an adjusting mechanism when a seat frame provided in an embodiment of the present utility model is in a lying posture;

Fig. 8 is a schematic diagram of an assembly structure of a slide rail portion and a slider portion according to an embodiment of the present utility model.

Icon: 1. a mounting; 11. mounting a frame plate; 111. a fourth limiting shaft; 112. a fifth limiting shaft; 12. a slide rail portion; 121. a second fixing plate; 122. a first guard plate; 123. a first baffle; 124. a first body plate; 13. a cross beam; 2. a backrest frame; 3. a seat frame; 31. a main body portion; 311. a slider part; 3111. a second body plate; 3112. a second guard plate; 312. a first fixing plate; 32. a connection part; 321. a first limiting shaft; 4. an adjusting mechanism; 41. a backrest adjusting rod; 411. a first end; 412. a second end; 42. a driving rod; 43. a follower lever; 431. the second limiting shaft; 432. the third limiting shaft; 44. a support rod; 5. a driving member; a. a first pivot point; b. a second pivot point; c. a third pivot point; d. a fourth pivot point; e. a fifth pivot point; f. and a sixth pivot point.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus 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 utility model.

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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1 to 8, a seat frame, which is a main structure constituting a seat unit, includes a seat frame 1, a backrest frame 2, a seat frame 3, an adjusting mechanism 4, and a driving member 5, wherein: the seat frame 3 is provided to the seat frame 1, and the seat frame 3 is movable in the front-rear direction of the seat frame 1; the adjusting mechanism 4 is adjustably arranged between the seat frame 3 and the seat frame 1, the adjusting mechanism 4 comprises a backrest adjusting rod 41, the backrest adjusting rod 41 is provided with a first end 411 and a second end 412, the first end 411 is arranged closer to the seat frame 3 than the second end 412, the second end 412 is higher than the first end 411 in the longitudinal direction, and the backrest frame 2 is arranged on the backrest adjusting rod 41; the driving piece 5 is installed between the seat frame 1 and the seat frame 3 or the adjusting mechanism 4 and is used for driving the seat frame 3 to move in the front-back direction of the seat frame 1; when the driving piece 5 drives the seat frame 3 to move toward the front of the seat frame 1, both the first end 411 and the second end 412 can move downward toward the front of the seat frame 1 in the longitudinal direction, and in the direction toward the front of the seat frame 1, the moving distance of the first end 411 is greater than the moving distance of the second end 412, and in the direction downward in the longitudinal direction, the moving distance of the first end 411 is smaller than the moving distance of the second end 412; when the driving piece 5 drives the seat frame 3 to move toward the rear of the seat frame 1, both the first end 411 and the second end 412 can move upward toward the rear of the seat frame 1 in the longitudinal direction, and the moving distance of the first end 411 is greater than the moving distance of the second end 412 in the direction toward the rear of the seat frame 1, and the moving distance of the first end 411 is smaller than the moving distance of the second end 412 in the longitudinal direction.

In this embodiment, the X direction is the front direction of the mount 1, the Y direction is the rear direction of the mount 1, and the Z direction is the longitudinal upward direction. The seat frame 1 is fixed relative to the ground, a seat cushion (not shown) is assembled on the seat frame 3 to form a seat part of the seat unit, and a backrest (not shown) is assembled on the backrest frame 2 to form a backrest part of the seat unit.

In use, when the driving member 5 drives the seat frame 3 to move toward the front of the seat frame 1, the driving member 5 drives the seat frame 3 to move toward the front of the seat frame 1 with respect to the seat frame 1, and at the same time, since the movement distance of the first end 411 is greater than the movement distance of the second end 412 when the back adjusting lever 41 moves in the direction toward the front of the seat frame 1, the movement distance of the first end 411 is smaller than the movement distance of the second end 412 when the back adjusting lever 41 moves in the longitudinal downward direction, and thus the back adjusting lever 41 as a whole assumes a forward moving and backward turning movement posture during this process, which enables the back frame 2 mounted on the back adjusting lever 41 to follow the back adjusting lever 41 to achieve posture adjustment, thereby enabling the seat frame to achieve transition from the sitting posture shown in fig. 1 to the lying posture shown in fig. 5.

As shown in fig. 1 to 7, in this process, the backrest frame 2 is linked with the seat frame 3 and moves synchronously under the driving of the same driving piece 5 through the adjusting mechanism 4, so that the structure is simple, and the failure rate of the seat frame, namely the seat unit, can be effectively reduced; in addition, in the posture adjustment process of the seat frame, the seat frame 3 is always positioned above the seat frame 1, which is beneficial to releasing the space below the seat frame, namely the seat unit, and is convenient for cleaning the bottom surface sanitation of the corresponding area; the backrest frame 2 integrally presents a movement posture of moving forwards and overturning backwards along with the backrest adjusting rod 41, so that the backrest part of the seat unit can well prolong the length of the seat part in the lying posture, the seat unit can better provide a supporting function for consumers in the lying posture, meanwhile, the friction feeling of the backrest part to the backs of the consumers can be reduced in the posture adjusting process of the seat unit, and the minimum gap between the backrest part and the wall behind the seat unit or other objects is basically unchanged, so that zero wall leaning of the seat unit is realized.

Further, the adjusting mechanism 4 includes a driving lever 42, a follower lever 43, and a supporting lever 44, wherein: the driving rod 42 is pivotally connected to the seat frame 3, the connection point between the driving rod 42 and the seat frame 1 is a first pivot point a, the connection point between the follow-up rod 43 and the seat frame 1 is a second pivot point b, one end of the backrest adjusting rod 41 is pivotally connected to the driving rod 42, the connection point between the backrest adjusting rod 41 and the seat frame is a third pivot point c, the other end of the backrest adjusting rod 41 is pivotally connected to the follow-up rod 43, the connection point between the backrest adjusting rod 41 and the seat frame is a fourth pivot point d, one end of the supporting rod 44 is pivotally connected to the driving rod 42, the connection point between the backrest adjusting rod and the follow-up rod is a fifth pivot point e, the other end of the supporting rod 44 is pivotally connected to the follow-up rod 43, and the connection point between the backrest adjusting rod and the support rod is a sixth pivot point f; the first pivot point a is located between the third pivot point c and the fifth pivot point e, the sixth pivot point f is located between the fourth pivot point d and the second pivot point b, the third pivot point c is located at the first end 411 and the fourth pivot point d is located at the second end 412 on the backrest adjusting rod 41.

As shown in fig. 3, 4 and 7, the driving rod 42, the backrest adjusting rod 41, the follower rod 43 and the supporting rod 44 are sequentially pivotally connected to form a planar four-bar mechanism, and when the seat frame 3 moves towards the front of the seat frame 1, the driving rod 42 and the follower rod 43 both turn towards the front of the seat frame 1, and the backrest adjusting rod 41 and the supporting rod 44 both turn towards the rear of the seat frame 1, so that the structural stability of the backrest frame 2 in the process of adjusting the posture of the seat frame can be ensured.

It should be noted that, the first pivot point a is located between the third pivot point c and the fifth pivot point e, and the first pivot point a translates along with the seat frame 3 during the posture adjustment process of the seat frame, specifically, during the posture adjustment process from the sitting posture as shown in fig. 1 to 3 to the lying posture as shown in fig. 5 to 7; the third pivot point c is forward in the front-rear direction of the seat frame 1 and moves downward in the longitudinal direction; the fifth pivot point e is forward in the front-rear direction of the frame 1 and moves upward in the longitudinal direction. The third pivot point c is a connection point between the driving lever 42 and the backrest adjusting lever 41, so that the backrest frame 2 mounted on the backrest adjusting lever 41, that is, the backrest portion of the seat unit, has the same movement condition as the third pivot point c at one end thereof, that is, the backrest portion of the seat unit has a certain thickness (the backrest frame 2 is mounted with a backrest having a certain thickness such that the backrest portion has a certain thickness), and if the backrest portion is simply turned backward without displacement in the longitudinal direction, the problem that the transition between the seat portion and the backrest portion of the seat unit in the lying posture is not smooth, particularly the transition between the seat portion and the backrest portion is higher than the seat portion, occurs in the process of adjusting the sitting posture of the seat frame from the sitting posture as shown in fig. 1 to 3, which causes discomfort to the consumer. In the utility model, the third pivot point c can be longitudinally displaced downwards while being turned backwards, so that the height difference at the transition position of the backrest part and the seat part is effectively eliminated in the lying posture, the smooth transition between the seat part and the backrest part in the lying posture is realized, and the comfort of the seat unit and the use experience of consumers are improved.

In the present embodiment, the seat frame 3 includes a main body portion 31 and a connecting portion 32 connected to each other, and the connecting portion 32 is provided near the rear side of the seat frame 1 and extends toward the rear of the seat frame 1; the driving lever 42 is pivotally connected to the connecting portion 32, and the connection point therebetween is a first pivot point a. The connecting part 32 is convenient for connecting and assembling the adjusting mechanism 4 and the seat frame 3, and the connecting part 32 extends towards the rear gear of the seat frame 1, so that the interference between the driving rod 42 and the backrest adjusting rod 41 and the main body part 31 of the seat frame in the lying posture can be avoided, the angle adjusting range of the backrest adjusting rod 41 or the backrest part of the seat unit is enlarged, and the backrest part of the seat unit can better play a role in prolonging the seat part in the lying posture.

Further, the first pivot point a is lower than the main body 31. The assembly height of the adjusting mechanism 4 in the longitudinal direction can be reduced, and the beneficial condition is provided for the effective elimination of the height difference at the transition of the backrest part and the seat part of the seat unit in the lying posture.

In this embodiment, the mount 1 is provided with a cross member 13. The driving member 5 is preferably a linear actuator. The movable part of the linear actuator is connected to the seat frame 3 and the fixed part is pivotally connected to the cross beam 13.

In other embodiments, the driving member 5 may also be a telescopic member such as an electric push rod, an air cylinder, or the like.

As shown in fig. 2, 3 and 6, the two adjusting mechanisms 4 are arranged in a substantially mirror image in the width direction of the seat frame 1 or the seat frame 3 to improve the structural stability of the backrest frame 2.

In this embodiment, the connecting portion 32 is provided with a first limiting shaft 321, and when the seat frame 3 moves to the limit position toward the front of the seat frame 1, the driving rod 42 abuts against the first limiting shaft 321. As shown in fig. 3 and 4, the first limiting shaft 321 is disposed on the connecting portion 32 and extends toward the corresponding driving rod 42. The first limiting shaft 321 limits the driving lever 42 to assist the driving member 5 in maintaining the seat frame in a stable lying posture when the seat frame is in the lying posture.

Further, as shown in fig. 3 and 4, the follower lever 43 is provided with a second limiting shaft 431 and a third limiting shaft 432, the sixth pivot point f is located between the second limiting shaft 431 and the third limiting shaft 432, and the second limiting shaft 431 is located between the fourth pivot point d and the sixth pivot point f; when the seat frame 3 moves to the extreme position toward the rear of the seat frame 1, the back adjusting lever 41 abuts against the second limiting shaft 431, and the support lever 44 abuts against the third limiting shaft 432. When the seat frame is in a sitting posture, the second limiting shaft 431 limits the backrest adjusting rod 41, meanwhile, the third limiting shaft 432 limits the supporting rod 44, and the second limiting shaft 431 and the third limiting shaft 432 are matched with the auxiliary driving piece 5 so that the seat frame can keep a stable sitting posture.

As shown in fig. 4 and 7, further, the seat frame 1 is provided with a fourth limiting shaft 111 and a fifth limiting shaft 112, and the second pivot point b is located between the fourth limiting shaft 111 and the fifth limiting shaft 112; when the seat frame 3 moves to the limit position towards the front of the seat frame 1, that is, when the seat frame is in the lying posture, the follower rod 43 is abutted to the fourth limiting shaft 111, and at this time, the fourth limiting shaft 111 limits the follower rod 43 to assist the driving piece 5 to keep the seat frame in the stable lying posture; when the seat frame 3 moves to the extreme position toward the rear of the seat frame 1, that is, when the seat frame is in the sitting posture, the follower lever 43 abuts against the fifth limiting shaft 112, and at this time, the fifth limiting shaft 112 limits the follower lever 43 to assist the driving member 5 to maintain the seat frame in the stable sitting posture.

To facilitate the arrangement of the fourth and fifth limiting shafts 111, 112, in this embodiment, the mounting plate 11 is provided on the seat frame 1, and the follower lever 43 is pivotally connected to the mounting plate 11. I.e. the follower lever 43 is pivotally connected to the seat frame 1 by means of the mounting plate 11. The fourth limiting shaft 111 and the fifth limiting shaft 112 are both disposed on the mounting frame plate 11.

In this embodiment, the seat frame 3 is slidably connected to the seat frame 1. Specifically, the seat frame 1 is provided with a slide rail part 12, and the slide rail part 12 is arranged to extend along the front and rear directions of the seat frame 1; the seat frame 3 is provided with a slider portion 311 that is fitted to the slide rail portion 12. The sliding block part 311 is matched with the sliding rail part 12 to realize the movement of the seat frame 3 relative to the seat frame 1 in the front and back directions of the seat frame 1, so that the structure is simple and the cost is low.

Specifically, as shown in fig. 8, the slide rail portion 12 includes a first main body plate 124, two first guard plates 122 are longitudinally arranged on the first main body plate 124 at intervals, a first baffle 123 is arranged at the end of the first guard plate 122, and the two first baffle plates 123 extend in opposite directions; the slider portion 311 includes a second body plate 3111, two second guard plates 3112 are longitudinally provided on the second body plate 3111 at intervals, the second guard plates 3112 extend at least partially into a region between the first body plate 124 and the first barrier 123, and in a direction in which the first body plate 124 is opposite to the first barrier 123, the second guard plates 3112 are restrained by the first body plate 124 and the corresponding second barrier plates; the main body 31, i.e., the seat frame 3, is mounted to the second main body plate 3111 by a first fixing plate 312, one of the first guard plates 122 being connected to the seat frame 1. By this arrangement, the thickness of the slide rail portion 12 and the slider portion 311 in the horizontal direction can be reduced, and excessive occupation of the width space of the seat portion can be avoided.

Further, the first fixing plate 312 has an L shape. The seat frame 3 is conveniently assembled with the slider portion 311.

Further, the seat frame 1 is provided with a second fixing plate 121, and the second fixing plate 121 is connected to the first body plate 124. Further, the second fixing plate 121 has an L shape. The second fixing plate 121 is used for reinforcing the connection structure between the slide rail portion 12 and the mount 1.

There is also provided in this embodiment a seat unit including the aforementioned seat cushion, a backrest, and a seat frame, wherein the seat cushion is fitted to the seat frame 3 to constitute a seat portion, and the backrest is fitted to the backrest frame 2 to constitute a backrest portion. The seat unit is simple in structure, convenient and quick posture adjustment can be realized, the failure rate is low, the seat part can be well prolonged under the lying posture state, and better use experience is provided for consumers.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. A seat frame, comprising:

A mount (1);

A backrest frame (2);

A seat frame (3) provided to the seat frame (1), the seat frame (3) being movable in the front-rear direction of the seat frame (1);

an adjusting mechanism (4) adjustably arranged between the seat frame (3) and the seat frame (1), the adjusting mechanism (4) comprising a back adjusting lever (41), the back adjusting lever (41) having a first end (411) and a second end (412), the first end (411) being arranged closer to the seat frame (3) than the second end (412), and in a longitudinal direction, the second end (412) being higher than the first end (411), the back frame (2) being mounted to the back adjusting lever (41);

When the seat frame (3) moves towards the front of the seat frame (1), the first end (411) and the second end (412) can both move downwards towards the front of the seat frame (1) along the longitudinal direction, and the moving distance of the first end (411) is larger than the moving distance of the second end (412) in the direction towards the front of the seat frame (1), and the moving distance of the first end (411) is smaller than the moving distance of the second end (412) in the direction downwards along the longitudinal direction;

When the seat frame (3) moves towards the rear of the seat frame (1), the first end (411) and the second end (412) can both move towards the rear of the seat frame (1) and upwards in the longitudinal direction, and the moving distance of the first end (411) is larger than the moving distance of the second end (412) in the direction towards the rear of the seat frame (1), and the moving distance of the first end (411) is smaller than the moving distance of the second end (412) in the direction along the longitudinal direction.

2. The seat frame according to claim 1, wherein the adjustment mechanism (4) comprises a drive lever (42), a follower lever (43) and a support lever (44), wherein:

The driving rod (42) is pivotally connected to the seat frame (3), a connection point between the driving rod (42) and the seat frame (3) is a first pivot point (a), the follow-up rod (43) is pivotally connected to the seat frame (1), a connection point between the driving rod and the seat frame is a second pivot point (b), one end of the backrest adjusting rod (41) is pivotally connected to the driving rod (42), a connection point between the backrest adjusting rod (41) is a third pivot point (c), the other end of the backrest adjusting rod (41) is pivotally connected to the follow-up rod (43), a connection point between the backrest adjusting rod and the backrest adjusting rod is a fourth pivot point (d), one end of the supporting rod (44) is pivotally connected to the driving rod (42), a connection point between the supporting rod and the follow-up rod is a fifth pivot point (e), and the other end of the supporting rod (44) is pivotally connected to the follow-up rod (43), and the connection point between the supporting rod and the supporting rod is a sixth pivot point (f).

The first pivot point (a) is located between the third pivot point (c) and the fifth pivot point (e), the sixth pivot point (f) is located between the fourth pivot point (d) and the second pivot point (b), the third pivot point (c) is located at the first end (411) and the fourth pivot point (d) is located at the second end (412) on the backrest adjustment rod (41).

3. A seat frame according to claim 2, wherein the seat frame (3) comprises a main body portion (31) and a connecting portion (32) connected to each other, the connecting portion (32) being provided near a rear side of the seat frame (1) and extending toward a rear of the seat frame (1);

The driving lever (42) is pivotally connected to the connecting portion (32), and the connection point between the driving lever and the connecting portion is the first pivot point (a).

4. A seat frame according to claim 3, wherein the first pivot point (a) is lower than the main body portion (31) in the longitudinal direction.

5. A seat frame according to claim 3, characterized in that the connection part (32) is provided with a first limit shaft (321), the active lever (42) being in abutment with the first limit shaft (321) when the seat frame (3) is moved towards the front of the seat frame (1) to a limit position.

6. The seat frame according to any one of claims 2-5, characterized in that a second limit shaft (431) and a third limit shaft (432) are provided on the follower lever (43), the sixth pivot point (f) being located between the second limit shaft (431) and the third limit shaft (432), the second limit shaft (431) being located between the fourth pivot point (d) and the sixth pivot point (f);

When the seat frame (3) moves to a limit position towards the rear of the seat frame (1), the backrest adjusting rod (41) is abutted to the second limit shaft (431), and the supporting rod (44) is abutted to the third limit shaft (432).

7. The seat frame according to any one of claims 2-5, wherein a fourth limit shaft (111) and a fifth limit shaft (112) are provided on the seat frame (1), the second pivot point (b) being located between the fourth limit shaft (111) and the fifth limit shaft (112);

When the seat frame (3) moves to a limit position towards the front of the seat frame (1), the follower rod (43) is abutted to the fourth limit shaft (111);

When the seat frame (3) moves to a limit position towards the rear of the seat frame (1), the follower rod (43) is abutted to the fifth limit shaft (112).

8. Seat frame according to claim 1, characterized in that the seat frame (3) is slidingly connected with the seat frame (1).

9. The seat frame according to claim 8, wherein the seat frame (1) is provided with a slide rail portion (12), the slide rail portion (12) being provided to extend in the front-rear direction of the seat frame (1);

The seat frame (3) is provided with a sliding block part (311) which is matched with the sliding rail part (12).

10. The seat frame according to claim 9, wherein the slide rail portion (12) includes a first main body plate (124), two first guard plates (122) are longitudinally arranged on the first main body plate (124) at intervals, first baffle plates (123) are arranged at the tail ends of the first guard plates (122), and the two first baffle plates (123) extend in opposite directions;

The sliding block part (311) comprises a second main body plate (3111), two second guard plates (3112) are longitudinally arranged on the second main body plate (3111) at intervals, the second guard plates (3112) at least partially extend into a region between the first main body plate (124) and the first baffle (123), and in the direction of the first main body plate (124) opposite to the first baffle (123), the second guard plates (3112) are limited by the first main body plate (124) and the corresponding second baffle;

The seat frame (3) is connected to a second body plate (3111), with one of the first guard plates (122) connected to the seat frame (1).

11. The seat frame according to claim 10, further comprising a first fixing plate (312), wherein the seat frame (3) is mounted to the second body plate (3111) through the first fixing plate (312).

12. The seat frame according to claim 1, characterized in that the seat frame further comprises a driving member (5), the driving member (5) being mounted between the seat frame (1) and the seat frame (3) or the adjusting mechanism (4) for driving the seat frame (3) to move in the front-rear direction of the seat frame (1).

13. A seating unit comprising a seat cushion, a back rest, and a seat frame as claimed in any one of claims 1 to 12, wherein:

The seat cushion is assembled to the seat frame (3) to form a seat portion, and the backrest is assembled to the backrest frame (2) to form a backrest portion.