CN113229659B

CN113229659B - A seat frame

Info

Publication number: CN113229659B
Application number: CN202110631336.8A
Authority: CN
Inventors: 李龙; 叶琦琦; 杨利明; 周炜尧; 沈斌; 陶康明; 王国伟
Original assignee: Dewertokin Technology Group Co Ltd
Current assignee: Dewertokin Technology Group Co Ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2025-01-28
Anticipated expiration: 2041-06-07
Also published as: CN113229659A

Abstract

The invention provides a seat frame which is characterized by comprising a base, a lifting unit, an extension unit and a power unit, wherein the base comprises a transverse supporting rod and a longitudinal supporting rod, the lifting unit comprises a support, a first lifting rod, a second lifting rod and a connecting sheet, the extension unit comprises a base plate, a lifting unit, a foot adjusting unit and a backrest adjusting unit, the base plate is fixed with the connecting sheet, the power unit is arranged on the base and is respectively connected with the lifting unit and the extension unit, the power unit comprises a driving unit, a connecting seat and a driving connecting rod, one end of the driving unit is hinged to the base, the other end of the driving unit is hinged to the connecting seat, the lifting unit comprises a first lifting connecting rod, a second lifting connecting rod, a third lifting connecting rod, a fourth lifting connecting rod and a seat mounting part, and the first lifting connecting rod and the second lifting connecting rod are provided with a first rotating pivot.

Description

Seat frame

Technical Field

The invention relates to a seat frame, in particular to a seat frame suitable for an old man chair.

Background

The seat is a common seat in life. Seats typically include a backrest, armrests, and the like. Along with the improvement of living standard and the use requirement of special groups, especially the requirement of the old on the chair, the special chair for the old is derived. The chair for the aged has an adjusting function, so that the chair can be adjusted among various using states.

The invention discloses a seat frame and a seat driven by double motors, which are disclosed in China patent application with application publication number CN 112089241A and application publication number 2020, and the invention is characterized by comprising a base frame (1), a lifting assembly (2), a driving assembly (3) and a telescopic connecting rod assembly (4), wherein the telescopic connecting rod assembly (4) is connected with a foot connecting piece (5) and a backrest connecting piece (6), the driving assembly (3) is used for driving the telescopic connecting rod assembly (4) under the driving of a first driving motor to change the telescopic state of the foot connecting piece (5) and driving the lifting assembly (2) to lift, the driving assembly (3) is used for driving the backrest connecting piece (6) to perform angle adjustment under the driving of a second motor, the driving assembly (3) comprises a first driving rod (31), the first driving connecting piece (32) is arranged on the first driving rod (31), the lifting assembly (2) comprises a lifting connecting plate (21), the lifting connecting plate (21) is respectively connected with the driving assembly (3) and the telescopic connecting rod assembly (4), the base frame (1) is provided with a second driving connecting piece (11) and the first driving connecting piece (41) is connected with the first driving connecting piece (41) Back link assembly (42) and middle link assembly (43), back link assembly (42) include first back link assembly (421) and second back link assembly (422), first back link assembly (421) pass through middle link assembly (43) with foot link assembly (41) link to each other, second back link assembly (422) are connected with third actuating lever (423), lift connecting plate (21) still are connected with fourth actuating lever (424), third actuating lever (423) are equipped with third drive connecting piece (425), fourth actuating lever (424) are equipped with fourth drive connecting piece (426), third drive connecting piece (425) with fourth drive connecting piece (426) are used for connecting the second driving motor. In the application of the invention, the state of the seat frame is adjusted by driving the first driving motor and the second motor, so that the structure is complex and the cost is high.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a seat frame with reasonable structural design.

The technical scheme adopted by the embodiment of the invention for solving the problems is that the seat frame is characterized by comprising the following components:

The base comprises a transverse supporting rod and a longitudinal supporting rod, wherein the transverse supporting rod is arranged in an extending mode along a first direction, the longitudinal supporting rod is arranged in an extending mode along a second direction, and the transverse supporting rod is connected with the longitudinal supporting rod;

The lifting unit comprises a support, a first lifting rod, a second lifting rod and a connecting sheet, wherein one end of the first lifting rod is hinged to the support, and the other end of the first lifting rod is hinged to the connecting sheet; one end of the second lifting rod is hinged to the support, and the other end of the second lifting rod is hinged to the connecting sheet, wherein the positions of the hinge points of the first lifting rod and the second lifting rod at the support are different, and the positions of the hinge points of the first lifting rod and the second lifting rod at the connecting sheet are different;

An extension unit comprising a base plate, a lifting unit, a foot adjusting unit and a backrest adjusting unit, wherein the base plate is fixed with the connecting sheet, and

The power unit is arranged on the base and is respectively connected with the lifting unit and the stretching unit, the power unit comprises a driving unit, a connecting seat and a driving connecting rod, one end of the driving unit is hinged to the base, and the other end of the driving unit is hinged to the connecting seat;

The lifting unit comprises a first lifting connecting rod, a second lifting connecting rod, a third lifting connecting rod, a fourth lifting connecting rod and a seat mounting part, wherein the first end of the first lifting connecting rod is hinged with the base plate, the second end of the first lifting connecting rod is hinged with the first end of the third lifting connecting rod, the second end of the third lifting connecting rod is hinged with the first end of the seat mounting part, the second end of the seat mounting part is hinged with the first end of the fourth lifting connecting rod, the second end of the fourth lifting connecting rod is hinged with the first end of the second lifting connecting rod, the second end of the second lifting connecting rod is connected with the base plate, and a first rotating fulcrum is arranged between the first lifting connecting rod and the second lifting connecting rod and is positioned in the middle area of the first lifting connecting rod and/or the second lifting connecting rod.

The second end of the second lifting connecting rod is provided with a chute, the base plate is provided with a corresponding hinge shaft, and the hinge shaft is arranged in the chute.

The seat mounting part is provided with a mounting member which is in a split type structure with the seat mounting part, and the mounting member comprises a first sheet-shaped part and a second sheet-shaped part, wherein the first sheet-shaped part is mounted on the seat mounting part, and the second sheet-shaped part is provided with a plurality of mounting holes.

The foot adjusting unit comprises a first foot adjusting rod, a second foot adjusting rod, a third foot adjusting rod, a fourth foot adjusting rod and a foot mounting part, wherein the first end of the first foot adjusting rod is hinged with the first end of the third lifting connecting rod, the second end of the first foot adjusting rod is hinged with the first end of the second foot adjusting rod, the second end of the second foot adjusting rod is hinged with the foot mounting part, the first end of the third foot adjusting rod is hinged with the first end of the seat mounting part, the second end of the third foot adjusting rod is hinged with the first end of the fourth foot adjusting rod, and the second end of the fourth foot adjusting rod is hinged with the foot mounting part.

In the embodiment of the invention, the second foot adjusting lever and the third foot adjusting lever are provided with a second rotating fulcrum, and the second rotating fulcrum is positioned in the middle area of the second foot adjusting lever and/or the third foot adjusting lever.

The foot adjusting unit according to the embodiment of the invention further comprises a fifth foot adjusting rod, wherein one end of the fifth foot adjusting rod is hinged to the first end of the third lifting connecting rod, and the other end of the fifth foot adjusting rod is hinged to the middle area of the third foot adjusting rod.

The backrest adjusting unit comprises a backrest adjusting rod and a backrest mounting part, wherein the first end of the backrest adjusting rod is hinged with the base plate, the second end of the backrest adjusting rod is hinged with the backrest mounting part, and the backrest mounting part is hinged with the second end of the seat mounting part.

The backrest adjusting rod comprises a main body part, wherein a first end and a second end of the backrest adjusting rod are respectively positioned at two ends of the main body part, and the main body part is bent with the first end of the backrest adjusting rod and the second end of the backrest adjusting rod respectively.

The power unit of the embodiment of the invention further comprises a first driving rod and a second driving rod, one end of the first driving rod is hinged to the driving connecting rod, the other end of the first driving rod is hinged to the second driving rod, and the other end of the second driving rod opposite to the first driving rod is hinged to the seat mounting part.

According to the embodiment of the invention, the first anti-toppling part and the second anti-toppling part are arranged on the base, one or two ends of the transverse supporting rod exceed the longitudinal supporting rod to form the first anti-toppling part, the second anti-toppling part is convexly arranged on the base in the second direction, the second anti-toppling part is U-shaped, and the ratio of the width dimension of the second anti-toppling part in the second direction to the width dimension of the supporting frame of the base is 1:3.5-4.5.

The first lifting connecting rod of the embodiment of the invention is provided with a first bending part so as to have a containing space in the width direction of the seat frame, and a part or all of the third lifting connecting rod is positioned in the containing space in the width direction of the seat frame.

The foot adjusting unit according to the embodiment of the invention further comprises a fifth foot adjusting rod, wherein one end of the fifth foot adjusting rod is hinged to the middle area of the first foot adjusting rod, and the other end of the fifth foot adjusting rod is hinged to the middle area of the third foot adjusting rod.

Compared with the prior art, the four-stage lifting seat has the advantages of being simple in structure and reasonable in design, being capable of completing adjustment of four states of the seat frame only through one power unit, being relatively low in cost, the second anti-toppling part is U-shaped and fixed on one group of transverse supporting rods, and forms a closed structure with the transverse supporting rods, so that the structure of the second anti-toppling part is firmer and can bear larger force, when the first lifting connecting rod and the second lifting connecting rod relatively rotate relative to a first rotating fulcrum, the relative positions of the first end of the first lifting connecting rod and the first end of the second lifting connecting rod can be lifted, and therefore the seat surface mounting part can be lifted.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic front view of a seat frame in embodiment 1 of the present invention, showing the seat frame in a standing position.

Fig. 2 is a schematic perspective view of a seat frame according to embodiment 1 of the present invention, showing the seat frame in a standing position.

Fig. 3 is a schematic perspective view of a seat frame in embodiment 1 of the present invention, showing the seat frame in a standing position.

Fig. 4 is an enlarged schematic view at B in fig. 3.

Fig. 5 is a schematic front view of the seat frame in embodiment 1 of the present invention, showing the seat frame in a sitting posture.

Fig. 6 is a schematic perspective view of a seat frame in embodiment 1 of the present invention, showing the seat frame in a sitting posture.

Fig. 7 is a schematic front view of the seat frame in embodiment 1 of the present invention, showing the seat frame in a TV posture.

Fig. 8 is a schematic perspective view of a seat frame in embodiment 1 of the present invention, showing the seat frame in a TV posture.

Fig. 9 is a schematic front view of the seat frame in embodiment 1 of the present invention, showing the seat frame in a lying state.

Fig. 10 is a schematic perspective view of a seat frame in embodiment 1 of the present invention, showing the seat frame in a TV posture.

Fig. 11 is an enlarged view at C in fig. 10.

Fig. 12 is a schematic perspective view of the extension unit.

Fig. 13 is an enlarged view at a in fig. 12.

Fig. 14 is a schematic perspective view of a second embodiment of the extension unit.

Fig. 15 is a schematic perspective view of a stretching unit.

Fig. 16 is a schematic front view of the seat frame in embodiment 2, showing the seat frame in a standing state.

Fig. 17 is a schematic front view of the seat frame in embodiment 2, showing the seat frame in a sitting posture.

Fig. 18 is a schematic front view of the seat frame in embodiment 2, showing the seat frame in a TV posture state.

Fig. 19 is a schematic front view of the seat frame in embodiment 2, showing the seat frame in a lying state.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.

Example 1

Referring to fig. 1 to 15, the seat frame of the present embodiment is adapted to an old man's chair, and includes a base 1, a lifting unit 2, an extension unit 3, and a power unit 4.

The base 1 in this embodiment includes a transverse support bar 11 and a longitudinal support bar 12, and the transverse support bar 11 and the longitudinal support bar are connected to form a support frame. The transverse support rods 11 are provided with two groups and the longitudinal support rods 12 are provided with two groups. The transverse support bars 11 extend in a first direction X and the longitudinal support bars 12 extend in a second direction Y. Wherein the first direction X is perpendicular or substantially perpendicular to the second direction Y.

The longitudinal support bar 12 may be welded to the transverse support bar 11. The longitudinal support bar 12 may also be bolted to the transverse support bar 11. One or both ends of the lateral support bar 11 extend beyond the longitudinal support bar 12 in the first direction X to form a first anti-toppling portion 111. The lifting units 2 in the present embodiment are provided in two groups and are disposed on the base 1. Specifically, the two sets of lifting units 2 are respectively disposed on the two sets of longitudinal support rods 12. The distance between the two sets of longitudinal support rods 12 defines the distance between the two sets of lifting units 2, which ultimately determines the width of the seat surface of the seat, which to a certain extent is within a fixed range. Therefore, one or both ends of the lateral support bar 11 are beyond the longitudinal support bar 12 to form the first anti-toppling portion 111, so that the seat is prevented from toppling in the first direction X, and the safety of the seat in use, particularly the safety of the seat for the elderly can be ensured.

The base 1 in this embodiment may further be provided with a second anti-toppling portion 13, where the second anti-toppling portion 13 is protruding from the base 1 in the second direction Y. The second anti-toppling part 13 is in a U shape and is fixed on one group of transverse supporting rods 11, and forms a closed structure with the transverse supporting rods 11, so that the structure of the second anti-toppling part 13 is more stable and can bear larger force. The second anti-toppling portion 13 in this embodiment is located in the central region of the base 1 in the first direction X. The second anti-toppling portion 13 comprises a tube portion, the tube portion is bent to form a U shape, and two ends of the tube portion are directly welded and fixed on the transverse supporting rod 11.

The ratio of the width dimension a of the second anti-toppling portion 13 in the second direction Y to the width dimension b of the support frame of the base 1 in this embodiment is 1:3-6. Further, the ratio of the width dimension a of the second anti-toppling portion 13 in the second direction Y to the width dimension b of the support frame of the base 1 is 1:3.5-4.5. Thus, the anti-toppling performance in the second direction Y can be improved.

The length dimension of the second anti-toppling portion 13 in the first direction x in this embodiment is at least 50% of the length dimension of the support frame. Thus, the anti-toppling performance in the first direction X can be improved.

In this embodiment, a plurality of support pads 14 are disposed at the bottom of the base 1. Specifically, two sides of the bottom of the transverse supporting rod 11 are respectively provided with a supporting pad 14 (or the bottom of the first anti-toppling portion 121 of the transverse supporting rod 11 is provided with a supporting pad 14), and two sides of the bottom of the longitudinal supporting rod 12 are respectively provided with a supporting pad 14. Further, a support pad 14 is provided at the bottom of the second anti-toppling portion 13 so that the second anti-toppling portion 13 can provide support in use.

The lifting unit 2 in this embodiment comprises a support 21, the support 21 being fixed to the base 1. Specifically, the support 21 is fixed to the longitudinal support bar 12. The support 21 comprises a sheet 211, and a part of the sheet 211 is attached to the inner side of the longitudinal support rod 12 opposite to the base 1 and is fixed. In some embodiments, the blade 211 is secured to the longitudinal support rod 12 by welding. In some embodiments, the blade 211 is bolted to the longitudinal support bar 12.

The support 21 is provided with a first limiting part 212, and the first limiting part 212 is propped against the top of the longitudinal support rod 12, so that the support 21 and the longitudinal support rod 12 are positioned, and subsequent fixing can be more conveniently performed. In this embodiment, the first limiting portion 212 is formed by bending the side portion of the sheet 211, and the first limiting portion 212 is protruded on the sheet 211 in the first direction X, and the first limiting portion 212 has the advantages of simple structure and convenient processing.

The lifting unit 2 in this embodiment may further include a lifting portion connected to the support 21. Specifically, the lifting portion (lifting unit 2) includes a first lifting lever 22, a second lifting lever 23, and a connecting piece 24, one end of the first lifting lever 22 is hinged to the support 21 and the other end thereof is hinged to the connecting piece 24, and one end of the second lifting lever 23 is hinged to the support 21 and the other end thereof is hinged to the connecting piece 24. The hinge point positions of the first lifting rod 22 and the second lifting rod 23 at the support 21 are different, and the hinge point positions of the first lifting rod 22 and the second lifting rod 23 at the connecting sheet 24 are different, so that the structure stability is better, the structure strength is higher, and the moving mode of the connecting sheet 24 is more controllable when the connecting sheet 24 moves relative to the first lifting rod 22 and the second lifting rod 23. The first lifting rod 22 and the second lifting rod 23 in this embodiment are both sheet-shaped and extend along a plane.

The connecting piece 24 in this embodiment is a sheet structure and includes a first portion 241 and a second portion 242, where the first lifting rod 23 and the second lifting rod 24 are both hinged to the first portion 241 of the connecting piece 24. The support 21 and the connecting piece 24 are arranged on the same side of the first lifting lever 22 and/or the second lifting lever 23. The vertical distance of the second portion 242 to the first lift bar 22 and/or the second lift bar 23 is greater than the vertical distance of the first portion 241 to the first lift bar 22 and/or the second lift bar 23. In other words, the second portion 242 is spaced apart from the first lifter 22 and/or the second lifter 23 in the thickness direction of the connecting piece 24, and the mount 21 is disposed within the spacing in the thickness direction of the connecting piece 24. By this arrangement of the distance, the abutment 21 is prevented from affecting the movement of the connecting piece 24 during movement.

The extension unit 3 in the present embodiment includes a base plate 31, a lifting unit 32, a foot adjusting unit 33, and a backrest adjusting unit 34, wherein the base plate 31 is fixed to the connection piece 24 (i.e., the extension unit 3 is fixed to the lifting unit 2 through the base plate 31). The extension units 3 in the present embodiment are provided with two sets, and the two sets of extension units 3 are located on both sides in the first direction X of the seat frame.

The lifting unit 32 is connected to the substrate 31, and the lifting unit 32 includes a first lifting link 321, a second lifting link 322, a third lifting link 323, a fourth lifting link 324, and a seat mounting portion 325, wherein a first end 3211 of the first lifting link 321 is hinged to the substrate 31, a second end 3212 of the first lifting link 321 is hinged to a first end 3231 of the third lifting link 323, a second end 3232 of the third lifting link 323 is hinged to a first end 3251 of the seat mounting portion 325, a second end 3252 of the seat mounting portion 325 is hinged to a first end 3241 of the fourth lifting link 324, a second end 3242 of the fourth lifting link 324 is hinged to a first end 3221 of the second lifting link 322, and a second end 3222 of the second lifting link 322 is connected to the substrate 31. The first lifting link 321, the second lifting link 322, the third lifting link 323, the fourth lifting link 324, and the seat mounting portion 325 in this embodiment are all sheet-like structures.

Further, the first lifting link 321 and the second lifting link 322 are provided with a first rotation fulcrum 301, and the first rotation fulcrum 301 is located in a middle area of the first lifting link 321 and/or the second lifting link 322. When the first lifting link 321 and the second lifting link 322 rotate relative to the first rotation pivot 301, the relative positions of the first end 3211 of the first lifting link 321 and the first end 3221 of the second lifting link 322 can be lifted, so that the seat mounting portion 325 can be lifted. Compared with the lifting structure with multiple connecting rods, the lifting structure is simpler in structure and higher in structural stability.

Further, a second end 3222 of the second lifting link 322 is provided with a chute 3223, and the base plate 31 is provided with a corresponding hinge shaft 311, and the hinge shaft 311 is disposed in the chute 3223. Therefore, the second end 3222 of the second lifting link 322 and the base plate 31 can be rotated relatively, and can be deflected relatively, so that the design of the movement structure is facilitated.

The substrate 31 in this embodiment is provided with a second limiting portion 312, and the second limiting portion 312 is configured corresponding to the first lifting link 322 to limit the sinking limit of the first lifting link 322.

The seat mounting portion 325 in this embodiment is provided with a third limiting portion 3253, and the third limiting portion 3253 is configured to correspond to the fourth lifting link 324 to limit the sinking limit of the seat mounting portion 325.

A mounting member 3254 may also be provided on the seat mounting portion 325 in this embodiment for mounting the seat. The mounting member 3254 may be directly welded to the seat mount 325, or may be bolted to the seat mount 325. In general, the mounting member 3254 and the seat mounting portion 325 are of a split type structure, and the mounting position and configuration thereof are more flexible. The mounting member 3254 includes a first plate portion 32541 for mounting to the seat mounting portion 325 (by bolting) and a second plate portion 32542 for supporting and mounting the second plate portion 32542 with mounting holes. The first sheet-like portion 32541 and the second sheet-like portion 32542 are integrally formed by bending.

The fourth lifting link 324 of this embodiment is "L" shaped or substantially "L" shaped to enhance structural strength and thus support capacity. Similarly, the third lifting link 323 may also be "L" shaped or substantially "L" shaped, thereby improving its structural strength and thus bearing capacity.

The first lifting link 321 in this embodiment has a first bending portion 3213 to have a receiving space in the width direction (first direction X) of the seat frame, and a part or all of the third lifting link 323 is located in the receiving space in the width direction of the seat frame. The first lifting link 321 in this embodiment has a second bending portion 3214, and the second bending portion 3214 forms a first end 3211 of the first lifting link 321, so as to be more conveniently connected to the substrate 31.

The foot adjusting unit 33 in the present embodiment is connected to the lifting unit 32, and includes a first foot adjusting lever 331, a second foot adjusting lever 332, a third foot adjusting lever 333, a fourth foot adjusting lever 334, and a foot mounting portion 335, the foot mounting portion 335 being configured to mount a foot supporting pedal. Wherein, the first end 3311 of the first foot adjusting lever 331 is hinged to the first end 3231 of the third lifting link 323, the second end 3312 of the first foot adjusting lever 331 is hinged to the first end 3321 of the second foot adjusting lever 332, and the second end 3322 of the second foot adjusting lever 332 is hinged to the foot mounting portion 335. The first end 3331 of the third foot adjustment lever 333 is hinged to the first end 3251 of the seat mount 325, the second end 3332 of the third foot adjustment lever 333 is hinged to the first end 3341 of the fourth foot adjustment lever 334, and the second end 3342 of the fourth foot adjustment lever 334 is hinged to the foot mount 335.

The second foot adjusting lever 332 and the third foot adjusting lever 333 in the present embodiment provide a second rotation fulcrum 3201, and the second rotation fulcrum 3201 is located in a middle area of the second foot adjusting lever 332 and/or the third foot adjusting lever 333. The middle region in this embodiment refers to the region between the first end 3321 and the second end 3322 of the second foot adjustment lever 332 and/or the region between the first end 3331 and the second end 3332 of the third foot adjustment lever 333. The second foot adjusting lever 332 and the third foot adjusting lever 333 are rotatable relative to each other through the second rotation fulcrum 3201, so that the foot adjusting unit 33 is unfolded or folded to achieve adjustment.

The foot adjusting unit 33 in this embodiment may further include a fifth foot adjusting lever 336, wherein one end of the fifth foot adjusting lever 336 is hinged to a middle region of the first foot adjusting lever 331 (herein, the middle region refers to a region between the first end 3311 and the second end 3312 of the first foot adjusting lever 331), and the other end of the fifth foot adjusting lever 336 is hinged to a middle region of the third foot adjusting lever 333 (herein, the middle region refers to a region between the first end 3331 and the second end 3332 of the third foot adjusting lever 333). By providing the fifth leg adjusting lever 336, the first leg adjusting lever 331 and the third leg adjusting lever 333 can be mutually supported by the fifth leg adjusting lever 336, and the stability of the structure can be improved.

The third leg adjusting lever 333 in the present embodiment is provided with a fourth limiting portion 3333, and the fourth limiting portion 3333 is configured corresponding to the second leg adjusting lever 332 to limit the folding limit of the leg adjusting portion 33.

The backrest adjusting unit 34 in this embodiment is connected to the lifting unit 32, and the backrest adjusting unit 34 is used for mounting a backrest. Specifically, the backrest adjusting unit 34 includes a backrest adjusting lever 341 and a backrest mounting portion 342, and the backrest mounting portion 342 is used for mounting the backrest. Wherein the first end 3411 of the back adjustment lever 341 is hinged to the base plate 31 and the second end 3412 of the back adjustment lever 341 is hinged to the back mounting portion 342. The back mount 342 is hinged to the second end 3252 of the seat mount 325. The backrest mounting portion 342 can be driven to rotate and adjust by the movement of the seat mounting portion 325, and the backrest adjusting lever 341 is provided to adjust the backrest mounting portion 342 on the one hand and to provide support for the backrest mounting portion 342 on the other hand.

The second end 3252 of the seat mounting portion 325 in this embodiment is provided with a turning portion 3253, and the turning portion 3253 forms an angle (the angle is approximately 70-120 degrees) with the main body of the seat mounting portion 325, and the backrest mounting portion 342 is hinged to the turning portion 3253. When in use, the turning part 3253 plays a certain supporting role, so that the turning part 3253 forms an included angle with the main body part of the seat mounting part 325, thereby improving the structural stability and strength and supporting capability.

The backrest adjusting rod 341 in the embodiment is concave on the outer side of the seat frame in the second direction Y, so that the structural strength of the backrest adjusting rod 341 can be improved, and in addition, the concave structure can also play a role in avoiding (avoiding a wood frame cross bar arranged on the seat frame) or positioning. The backrest adjusting rod 341 in the present embodiment includes a main body 3413, and a first end 3411 and a second end 3412 of the backrest adjusting rod 341 are located at two ends of the main body 3413. The body portion 3413 forms an obtuse angle with the first end 3411, and the body portion 3413 forms an obtuse angle with the second end 3412. That is, the main body 3413 is bent with the first end 3411 and the second end 3412, respectively. The structure of the backrest adjusting rod 341 can avoid stress concentration during bearing, thereby improving the bearing capacity.

The stretching unit 3 in this embodiment is used as a separate component, which can realize the opening and closing of the foot adjusting unit 33, the angle adjustment of the backrest adjusting unit 34, and the lifting or lowering of the lifting unit 32, and can realize the switching of sitting posture, TV posture and lying posture, and has simpler structure and strong structural stability.

The power unit 4 in this embodiment is disposed on the base 1 and connected to the lifting unit 2 and the stretching unit 3, respectively, and can control the lifting unit 2 to lift and the stretching unit 3 to operate.

The specific power unit 4 includes a driving unit 41, a connecting seat 42, and a driving connection rod 43. The driving unit 41 may be telescopic, and may adopt a cylinder structure, a oil rod structure or a motor structure in the prior art, so as to implement a telescopic function. In the present embodiment, the driving unit 41 is driven by a motor to achieve expansion and contraction thereof, thereby adjusting the state of the seat frame. One end of the driving unit 41 is hinged on the base 1, and a first hinging seat 44 is fixed on one group of transverse supporting rods 11 of the specific base 1, and a first end of the driving unit 41 is hinged on the first hinging seat 44. The other end of the driving unit 41 is hinged to the connecting seat 42, specifically, a second hinge seat 45 is fixed on the driving connecting rod 43, and the other end of the driving unit 41 is hinged to the second hinge seat 45.

One end of the driving connection rod 43 in the present embodiment is directly hinged to the connection piece 24, so that the connection piece 24 can be lifted up and down by the driving connection rod 43 when the driving unit 41 is operated.

The drive connection rod 43 may be directly or indirectly connected to the seat mount 325. In this embodiment, the drive connection rod 43 is indirectly connected to the seat mounting portion 325. Specifically, the power unit 4 further includes a first driving lever 46 and a second driving lever 47, one end of the first driving lever 46 is hinged to the driving connection rod 43, and the other end thereof is hinged to the second driving lever 47, and the other end of the second driving lever 47 opposite to the first driving lever 46 is hinged to the seat mounting portion 325. When the driving unit 41 is operated, the seat attachment portion 325 is driven to operate the extension unit 3.

In the embodiment, the four states of the seat frame can be adjusted by only one power unit, so that the seat frame has a simple structure and relatively reduced cost.

The seat frame in this embodiment has several states to provide different use positions. Specifically, the seat frame has a sitting posture state (which can be used as a normal seat), a TV posture state (in which the seat is put down, which is suitable for a television-viewing posture), a lying posture state (in which the backrest is put down further than the TV posture state, which can be a lying posture), and a standing posture state (which is raised up compared with the sitting posture state, which can assist the user in standing up).

As shown in fig. 1, the standing state of the seat frame is shown, in which the user (particularly the elderly) is assisted to stand up, and at this time, the elevating unit 2 is elevated to a raised or highest position. The foot adjusting unit 33 is folded with respect to the lifting unit 32. The lifting unit 32 is relatively lowered. The backrest adjustment unit 34 has an angle a1 with respect to the seat mount 325. The length dimension of the driving unit 41 is L1.

As shown in fig. 5, which shows a sitting posture of the seat frame, at this time, the elevating unit 2 is lowered to a low position. The first lifting lever 22 of the lifting unit 2 is supported by the lateral support lever 11. The first lifting link 321 is supported on the second limiting portion 312 of the substrate 31, and the foot adjusting unit 33 is folded relative to the lifting unit 32. The lifting unit 32 is relatively lowered. The backrest adjustment unit 34 has an angle a2 (a 1 is equal to or substantially equal to a 2) with respect to the seat mount 325. The length dimension of the driving unit 41 is L2 (L2 is smaller than L1).

As shown in fig. 7, the TV pose state of the seat frame is displayed, at which time the lifting unit 2 is lowered to the low position. The first lifting lever 22 of the lifting unit 2 is supported by the lateral support lever 11. The foot adjusting unit 33 is unfolded with respect to the lifting unit 32. The lifting unit 32 is relatively lowered. The angle of the back adjustment unit 34 relative to the seat mount 325 is a3 (a 3 is greater than a2, i.e., the back adjustment unit 34 expands more in the TV position than in the sitting position). The length dimension of the driving unit 41 is L3 (L3 is smaller than L2).

As shown in fig. 9, the lying state of the seat frame is shown, at which time the lifting unit 2 is lowered to the low position. The first lifting lever 22 of the lifting unit 2 is supported by the lateral support lever 11. The foot adjusting unit 33 is unfolded with respect to the lifting unit 32. The lifting unit 32 is relatively lifted and the foot adjustment unit 33 is lifted accordingly, which may create a zero gravity-like function. The angle of the back adjustment unit 34 relative to the seat mount 325 is a4 (a 4 is greater than a3, i.e., the back adjustment unit 34 expands more in the recumbent state than in the TV state). The length dimension of the driving unit 41 is L4 (L4 is smaller than L1).

When the driving unit 41 is in an extended state, the seat frame is in a standing state, and the driving unit 41 is sequentially switched to a sitting state, a TV posture state and a lying state in a gradual contraction process. The lifting unit 2 is lifted only when the standing posture is turned, and remains stationary in other states.

Example 2

Referring to fig. 16 to 19, the seat frame of the present embodiment is adapted to an old man's chair, and includes a base 1, a lifting unit 2, an extension unit 3, and a power unit 4. The basic mechanism of the seat frame in this embodiment is the same as that of the seat frame in embodiment 1. In contrast, the fifth foot adjustment lever 336 of the foot adjustment unit 33 has one end hinged to the first end 3231 of the third lift link 323 and the other end hinged to a middle region of the third foot adjustment lever 333 (herein, the middle region refers to a region between the first end 3331 and the second end 3332 of the third foot adjustment lever 333).

Example 3

The senior citizen chair of the present embodiment includes the seat frame of embodiment 1 or 2.

The foregoing description of the invention is merely exemplary of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions, without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A seat frame, comprising:

2. The seat frame of claim 1 wherein the second end of the second lift link is provided with a chute and the base plate is provided with a corresponding hinge shaft disposed within the chute.

3. The seat frame of claim 1, wherein the foot adjusting unit comprises a first foot adjusting lever, a second foot adjusting lever, a third foot adjusting lever, a fourth foot adjusting lever, and a foot mounting portion, wherein a first end of the first foot adjusting lever is hinged to a first end of the third lifting link, a second end of the first foot adjusting lever is hinged to a first end of the second foot adjusting lever, a second end of the second foot adjusting lever is hinged to the foot mounting portion, a first end of the third foot adjusting lever is hinged to a first end of the seat mounting portion, a second end of the third foot adjusting lever is hinged to a first end of the fourth foot adjusting lever, and a second end of the fourth foot adjusting lever is hinged to the foot mounting portion.

4. The seat frame of claim 3 wherein the second foot adjustment lever and the third foot adjustment lever provide a second pivot point, the second pivot point being located in a middle region of the second foot adjustment lever and/or the third foot adjustment lever.

5. The seat frame of claim 3 or 4 wherein the foot adjustment unit further comprises a fifth foot adjustment lever having one end hinged to the first end of the third lift link and the other end hinged to a middle region of the third foot adjustment lever.

6. The seat frame of claim 1, wherein the back adjustment unit includes a back adjustment lever and a back mounting portion, wherein a first end of the back adjustment lever is hinged to the base plate and a second end of the back adjustment lever is hinged to the back mounting portion, and wherein the back mounting portion is hinged to the second end of the seat mounting portion.

7. The seat frame of claim 6, wherein the back adjustment lever includes a main body portion, and the first end and the second end of the back adjustment lever are respectively located at two ends of the main body portion, and the main body portion is bent with the first end of the back adjustment lever and the second end of the back adjustment lever, respectively.

8. The seat frame of claim 1 wherein the power unit further comprises a first drive bar and a second drive bar, one end of the first drive bar being hinged to the drive link and the other end of the first drive bar being hinged to the second drive bar, the second drive bar being hinged to the seat mount opposite the other end of the first drive bar.

9. The seat frame of claim 1, wherein a first anti-toppling portion and a second anti-toppling portion are disposed on the base, one or both ends of the transverse support rod exceed the longitudinal support rod to form the first anti-toppling portion, the second anti-toppling portion is protruding on the base in the second direction, the second anti-toppling portion is U-shaped, and the ratio of the width dimension of the second anti-toppling portion in the second direction to the width dimension of the support frame of the base is 1:3.5-4.5.

10. The seat frame of claim 1, wherein the first lift link has a first bent portion to have a receiving space in a width direction of the seat frame, and a part or all of the third lift link is located in the receiving space in the width direction of the seat frame.

11. The seat frame of claim 1, wherein the seat mounting portion is provided with a mounting member having a split type structure from the seat mounting portion, the mounting member including a first sheet portion and a second sheet portion, wherein the first sheet portion is mounted to the seat mounting portion, and the second sheet portion is provided with a plurality of mounting holes.

12. The seat frame of claim 3 or 4, wherein the foot adjusting unit further comprises a fifth foot adjusting lever having one end hinged to a middle region of the first foot adjusting lever and the other end hinged to a middle region of the third foot adjusting lever.