CN113229659A

CN113229659A - Chair frame

Info

Publication number: CN113229659A
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: 2021-08-10

Abstract

The present invention provides a seat frame, including: 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 substrate, a lifting unit, a foot adjusting unit and a backrest adjusting unit, wherein the substrate is fixed with the connecting sheet; the power unit is arranged on the base and is respectively connected with the lifting unit and the extending 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; the first lifting connecting rod and the second lifting connecting rod are provided with a first rotating fulcrum.

Description

Chair frame

Technical Field

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

Background

The seat is a common seat in life. The seat typically includes a backrest, armrests, and the like. With the improvement of living standard and the use requirements of special groups, particularly the requirements of the old people on the chair, special chairs for the old people are derived. The chair for the old people has an adjusting function, so that the chair for the old people can be adjusted among various using states.

The application publication number is CN 112089241A, and the application publication date is China invention application of 2020, 12, 18, discloses a seat frame and a seat driven by double motors, which comprises a base frame (1), a lifting component (2), a driving component (3) and a telescopic connecting rod component (4); the telescopic connecting rod component (4) is connected with a foot connecting piece (5) and a backrest connecting piece (6); the driving component (3) is used for driving the telescopic connecting rod component (4) under the driving of a first driving motor so as to change the telescopic state of the foot connecting piece (5) and drive the lifting component (2) to lift; and is used for driving the backrest connecting piece (6) to carry out angle adjustment under the drive of a second motor; the driving assembly (3) comprises a first driving rod (31), and a 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), a second driving connecting piece (11) is arranged on the base frame (1), and the first driving connecting piece (32) and the second driving connecting piece (11) are used for being connected with a first driving motor; telescopic link assembly (4) include foot link assembly (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) through middle link assembly (43) with foot link assembly (41) link to each other, second back link assembly (422) are connected with third drive pole (423), lift connecting plate (21) still is connected with fourth drive pole (424), third drive pole (423) are equipped with third drive connecting piece (425), fourth drive pole (424) are equipped with fourth drive connecting piece (426), third drive connecting piece (425) with fourth drive connecting piece (426) are used for connecting second driving motor. In the application of the invention, the first driving motor and the second motor are used for driving and adjusting the state of the seat frame, so that the structure is complex and the cost is high.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned deficiencies in the prior art and providing a seat frame having a rational structural design.

The technical scheme adopted by the embodiment of the invention for solving the problems is as follows: a seat frame, comprising:

the base comprises a transverse supporting rod and a longitudinal supporting rod, the transverse supporting rod extends along a first direction, the longitudinal supporting rod extends 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 piece, 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 piece; 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;

the extension unit comprises a substrate, a lifting unit, a foot adjusting unit and a backrest adjusting unit, wherein the substrate 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 extending 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, and the second end of the second lifting connecting rod is connected with the base plate; the first lifting connecting rod and the second lifting connecting rod are provided with a first rotating fulcrum, and the first rotating fulcrum is located in the middle area of the first lifting connecting rod and/or the second lifting connecting rod.

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

In the embodiment of the invention, the seat mounting part is provided with a mounting component which is in a split structure with the seat mounting part, the mounting component comprises a first sheet part and a second sheet part, wherein the first sheet part is mounted on the seat mounting part, and the second sheet 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 portion, wherein the first end of the first foot adjusting rod is hinged to the first end of the third lifting connecting rod, the second end of the first foot adjusting rod is hinged to the first end of the second foot adjusting rod, the second end of the second foot adjusting rod is hinged to the foot mounting portion, the first end of the third foot adjusting rod is hinged to the first end of the seat mounting portion, the second end of the third foot adjusting rod is hinged to the first end of the fourth foot adjusting rod, and the second end of the fourth foot adjusting rod is hinged to the foot mounting portion.

In the embodiment of the present invention, the second foot adjustment lever and the third foot adjustment lever are provided with a second rotation fulcrum, and the second rotation fulcrum is located in a middle area of the second foot adjustment lever and/or the third foot adjustment lever.

The foot adjusting unit of the embodiment of the invention further comprises a fifth foot adjusting rod, 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 a first end of the backrest adjusting rod is hinged with the base plate, a second end of the backrest adjusting rod is hinged with the backrest mounting part, and the backrest mounting part is hinged with a 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 located 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.

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

In the embodiment of the invention, the base is provided with a first anti-dumping part and a second anti-dumping part, and one end or two ends of the transverse supporting rod exceed the longitudinal supporting rod to form the first anti-dumping part; the second anti-toppling portion is arranged on the base in a protruding mode 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 supporting frame of the base is 1: 3.5 to 4.5.

In the embodiment of the invention, the first lifting connecting rod is provided with a first bending part so as to form an accommodating space in the width direction of the seat frame, and one part or all of the third lifting connecting rod is positioned in the accommodating space in the width direction of the seat frame.

The foot adjusting unit of the embodiment of the invention further comprises a fifth foot adjusting rod, 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 invention has one or more of the following advantages or effects: the structure is simple, and the design is reasonable; the four states of the seat frame can be adjusted only by one power unit, so that the cost is relatively reduced; the second anti-dumping part is U-shaped and is 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-dumping part is more stable and can bear larger force; when the first lifting connecting rod and the second lifting connecting rod rotate relative to the 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, so that the seat mounting part can be lifted; the second end of the second lifting connecting rod is provided with a sliding chute, the base plate is provided with a corresponding hinge shaft, and the hinge shaft is arranged in the sliding chute, so that the second end of the second lifting connecting rod and the base plate can realize relative rotation and relative deflection, and the design of a motion structure is facilitated; the structure of the backrest adjusting rod avoids stress concentration during bearing, thereby improving bearing capacity and avoiding a wood frame cross rod arranged on the seat frame.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view schematically showing a seat frame according to embodiment 1 of the present invention, showing the seat frame in a standing posture.

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 posture.

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

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

Fig. 7 is a front view schematically showing the seat frame in the TV posture in the seat frame according to embodiment 1 of the present invention.

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

Fig. 9 is a front view schematically showing the seat frame in the reclining position in the seat frame according to embodiment 1 of the present invention.

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 state.

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

Fig. 12 is a perspective view of the first stretching unit.

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

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

Fig. 15 is a perspective view of the extension unit.

Fig. 16 is a front view schematically illustrating the seat frame according to embodiment 2, showing the seat frame in a standing posture.

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

Fig. 18 is a front view schematically showing the seat frame in the TV posture in the seat frame according to embodiment 2.

Fig. 19 is a front view schematically showing the seat frame in the reclining state in the seat frame according to embodiment 2.

Detailed Description

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

Example 1

Referring to fig. 1 to 15, the seat frame of the present embodiment, which is suitable for an elder chair, includes a base 1, a lifting unit 2, an extending unit 3, and a power unit 4.

The base 1 in this embodiment comprises a transverse support bar 11 and a longitudinal support bar 12, wherein the transverse support bar 11 and the longitudinal support bar are connected to form a support frame. Two groups of transverse supporting rods 11 and two groups of longitudinal supporting rods 12 are arranged. The transverse support bar 11 extends along a first direction X, and the longitudinal support bar 12 extends along a second direction Y. Wherein the first direction X is perpendicular or substantially perpendicular to the second direction Y.

The longitudinal support rods 12 may be welded to the lateral support rods 11. The longitudinal support rods 12 may also be bolted to the transverse support rods 11. One or both ends of the transverse supporting rod 11 extend beyond the longitudinal supporting rod 12 in the first direction X to form a first anti-tipping portion 111. The two sets of lifting units 2 are arranged 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 bars 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 some extent is within a fixed range. Therefore, one or both ends of the transverse support bar 11 are extended beyond the longitudinal support bar 12 to form the first falling prevention portion 111, so that the seat can be prevented from falling 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 include a second anti-toppling portion 13, and the second anti-toppling portion 13 is disposed on the base 1 in a protruding manner in the second direction Y. The second anti-tipping portion 13 is U-shaped, and is fixed to one of the transverse support rods 11, and forms a closed structure with the transverse support rods 11, so that the second anti-tipping portion 13 is more stable in structure and can bear larger force. The second anti-toppling portion 13 in this embodiment is located in a middle region of the base 1 in the first direction X. The second falling prevention portion 13 includes a pipe portion bent to form a "U" shape, and both ends of the pipe portion are directly welded and fixed to the lateral support rods 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 to 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 to 4.5. So that the toppling prevention performance in the second direction Y can be improved.

The second anti-toppling portion 13 in this embodiment has a length dimension in the first direction x that occupies at least 50% of the length dimension of the support frame. So that the falling prevention performance in the first direction X can be improved.

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

The lifting unit 2 in this embodiment includes a support 21, and the support 21 is fixed to the base 1. In particular, the support 21 is fixed to the longitudinal support bar 12. The support 21 comprises a sheet body 211, and a part of the sheet body 211 is attached to the inner side of the longitudinal support bar 12 relative to the base 1 and fixed. In some embodiments, the plate 211 is fixed to the longitudinal support bar 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 portion 212, and the first limiting portion 212 abuts against the top of the longitudinal support rod 12, so that the support 21 and the longitudinal support rod 12 can be positioned, and subsequent fixing can be performed more conveniently. In this embodiment, the first position-limiting portion 212 is formed by bending the side portion of the sheet body 211, and the first position-limiting portion 212 is disposed on the sheet body 211 in a protruding manner in the first direction X, and the first position-limiting portion 212 has the advantages of simple structure and convenience in processing.

The lifting unit 2 in this embodiment may further include a lifting portion connected to the support 21. Specifically, the lifting part (lifting unit 2) comprises a first lifting rod 22, a second lifting rod 23 and a connecting piece 24, one end of the first lifting rod 22 is hinged to the support 21, and the other end of the first lifting rod is hinged to the connecting piece 24; one end of the second lifting rod 23 is hinged to the support 21 and the other end thereof is hinged to the connecting piece 24. The positions of the hinge points of the first lifting rod 22 and the second lifting rod 23 at the support 21 are different, and the positions of the hinge points of the first lifting rod 22 and the second lifting rod 23 at the connecting piece 24 are different, so that the structural stability is better, the structural strength is higher, and the moving mode of the connecting piece 24 is more controllable when the connecting piece 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-shaped structure and includes a first portion 241 and a second portion 242, wherein 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 rod 22 and/or the second lifting rod 23. The vertical distance of the second portion 242 to the first lift pin 22 and/or the second lift pin 23 is greater than the vertical distance of the first portion 241 to the first lift pin 22 and/or the second lift pin 23. In other words, the second portion 242 is spaced apart from the first lifter bar 22 and/or the second lifter bar 23 in the thickness direction of the connecting piece 24, and the support 21 is disposed within the gap in the thickness direction of the connecting piece 24. By means of this spacing, the abutment 21 is prevented from influencing the movement of the web 24 during movement.

The extension unit 3 in this embodiment includes a base plate 31, a lifting unit 32, a foot adjustment unit 33, and a backrest adjustment unit 34, wherein the base plate 31 is fixed with the connecting 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 this embodiment are provided in two sets, and the two sets of extension units 3 are located on both sides of the seat frame in the first direction X.

The lifting unit 32 is connected to the base plate 31, 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 base plate 31, a second end 3212 of the first lifting link 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 base plate 31. In this embodiment, 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 are all sheet-shaped structures.

Further, the first lift link 321 and the second lift link 322 are provided with a first rotation fulcrum 301, and the first rotation fulcrum 301 is located at a middle region of the first lift link 321 and/or the second lift link 322. When the first lifting link 321 and the second lifting link 322 rotate relative to the first rotation fulcrum 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. The lifting structure of many connecting rods is compared to above-mentioned structure, and the structure is simpler, and structural stability is higher.

Further, a sliding slot 3223 is disposed at the second end 3222 of the second lifting link 322, and a corresponding hinge shaft 311 is disposed on the base plate 31, wherein the hinge shaft 311 is disposed in the sliding slot 3223. Therefore, the second end 3222 of the second lift link 322 may rotate relative to the base plate 31 and may deflect relative to the base plate, thereby facilitating the design of the motion structure.

In this embodiment, the substrate 31 is provided with a second position-limiting portion 312, and the second position-limiting portion 312 and the first lifting link 322 are correspondingly configured to limit the sinking limit of the first lifting link 322.

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

The seat mounting portion 325 of this embodiment may further include a mounting member 3254 for mounting a seat. The mounting member 3254 may be directly welded and fixed to the seat mounting portion 325, or may be fixed to the seat mounting portion 325 by bolts. Generally, the mounting member 3254 and the seat mounting portion 325 are of a split structure, and the mounting position and the structural configuration are more flexible. The mounting member 3254 includes a first plate portion 32541 and a second plate portion 32542, wherein the first plate portion 32541 is used for mounting to the seat mounting portion 325 (by bolts), and the second plate portion 32542 is used for supporting and mounting and is provided with a plurality of mounting holes. The first sheet portion 32541 and the second sheet portion 32542 are integrally formed by bending.

The fourth lift link 324 in this embodiment is "L" shaped or substantially "L" shaped to increase its structural strength and thus its support capacity. Similarly, the third lift link 323 may be "L" shaped or substantially "L" shaped to increase its structural strength and thus support.

The first lifting link 321 in this embodiment has a first bending portion 3213 to form a receiving space in the width direction (the 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. In this embodiment, the first lifting link 321 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 this 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, and the foot mounting portion 335 is configured to mount a foot support pedal. The first end 3311 of the first foot adjustment lever 331 is hinged to the first end 3231 of the third lift link 323, the second end 3312 of the first foot adjustment lever 331 is hinged to the first end 3321 of the second foot adjustment lever 332, and the second end 3322 of the second foot adjustment 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 mounting portion 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 mounting portion 335.

The second and third foot adjustment levers 332, 333 of the present embodiment are provided with a second rotation pivot 3201, and the second rotation pivot 3201 is located in the middle area of the second and/or third foot adjustment levers 332, 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 and third leg adjustment levers 332 and 333 are relatively rotatable via the second rotation pivot 3201 to expand or contract the leg adjustment unit 33 to achieve adjustment, and the above structure is simple.

The foot adjusting unit 33 in this embodiment may further include a fifth foot adjusting lever 336 having one end hinged to a middle region of the first foot adjusting lever 331 (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 hinged to a middle region of the third foot adjusting lever 333 (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 adjustment lever 336, the first leg adjustment lever 331 and the third leg adjustment lever 333 can be supported by the fifth leg adjustment lever 336, and the structural stability can be improved.

The third leg adjustment lever 333 of the present embodiment is provided with a fourth position-limiting portion 3333, and the fourth position-limiting portion 3333 and the second leg adjustment lever 332 are disposed correspondingly to limit the closing limit of the leg adjustment 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 to mount 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 a backrest. Wherein the first end 3411 of the backrest adjustment rod 341 is hinged to the base plate 31, and the second end 3412 of the backrest adjustment rod 341 is hinged to the backrest mounting part 342. The back mount portion 342 is hingedly connected to the second end 3252 of the seat mount 325. Through the activity of seat installation portion 325, can drive back installation portion 342 and rotate the regulation, and the setting of back regulation pole 341 plays the effect of adjusting back installation portion 342 jointly on the one hand, and on the other hand provides the support to back installation portion 342.

In this embodiment, a turning portion 3253 is disposed at the second end 3252 of the seat mounting portion 325, the turning portion 3253 forms an included angle (the included angle is about 70 degrees to 120 degrees) with the main portion 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 the supporting capability.

In this embodiment, the backrest adjustment rod 341 is concave outward in the second direction Y of the seat frame, so as to improve the structural strength of the backrest adjustment rod 341, and the concave structure may also perform a position avoidance function (avoiding a wood frame rail disposed on the seat frame) or a positioning function. The backrest adjustment lever 341 in this embodiment includes a body portion 3413, and the first end 3411 and the second end 3412 of the backrest adjustment lever 341 are respectively located at both ends of the body portion 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 body 3413 is bent at the first end 3411 and the second end 3412, respectively. The structure of the backrest adjusting rod 341 prevents concentrated stress when bearing load, thereby improving the bearing capacity.

The extension unit 3 in this embodiment is an independent component, and 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 the sitting posture, the TV posture, and the lying posture, and has a 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 extending unit 3, respectively, and can control the lifting unit 2 to lift and the extending unit 3 to move.

The power unit 4 includes a driving unit 41, a connecting base 42 and a driving connecting rod 43. The driving unit 41 can be extended and retracted, and it can adopt a cylinder structure, an oil rod structure or a motor structure in the prior art to realize the extension and retraction function. In this embodiment, the driving unit 41 is driven by a motor to extend and contract, thereby adjusting the state of the seat frame. One end of the driving unit 41 is hinged to the base 1, a first hinge seat 44 is fixed to one group of the transverse supporting rods 11 of the base 1, and a first end of the driving unit 41 is hinged to the first hinge seat 44. The other end of the driving unit 41 is hinged to the connecting seat 42, specifically, a second hinged seat 45 is fixed on the driving connecting rod 43, and the other end of the driving unit 41 is hinged to the second hinged seat 45.

One end of the driving link 43 in this embodiment is directly hinged to the connecting piece 24, so that the connecting piece 24 can be lifted by driving the link 43 when the driving unit 41 is actuated.

The drive link 43 may be directly or indirectly connected to the seat mount 325. In this embodiment, the drive link 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 link 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 extension unit 3 can be operated by driving the seat surface mounting portion 325.

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

The seat frame in this embodiment has several states to provide different use postures. Specifically, the seat frame has a sitting position (usable as a normal seat), a TV posture (a position in which the seat is laid down and is suitable for watching TV), a lying position (a position in which the backrest is laid down further than the TV posture), and a standing position (a position in which the backrest is raised than the sitting position and assists the user in standing up).

As shown in fig. 1, a standing posture state of the seat frame is shown, in which a user (particularly, an old person) is assisted to stand up, and the lifting unit 2 is raised to a high 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 angle of the back adjustment unit 34 with respect to the seat mounting portion 325 is a 1. The length dimension of the drive unit 41 is L1.

As shown in fig. 5, which shows the sitting position of the seat frame, the lifting unit 2 is lowered. The first lifting bar 22 of the lifting unit 2 is supported to the transverse support bar 11. The first lifting link 321 is supported on the second limiting portion 312 of the base plate 31, and the foot adjusting unit 33 is folded relative to the lifting unit 32. The lifting unit 32 is relatively lowered. The angle of the back adjustment unit 34 with respect to the seat mounting portion 325 is a2(a1 is equal to or substantially equal to a 2). The length dimension of the drive unit 41 is L2(L2 is smaller than L1).

As shown in fig. 7, the TV posture state of the seat frame is displayed, and the lifting unit 2 is lowered to the low position. The first lifting bar 22 of the lifting unit 2 is supported to the transverse support bar 11. The foot adjusting unit 33 is deployed with respect to the lifting unit 32. The lifting unit 32 is relatively lowered. The angle of the back adjustment unit 34 with respect to the seat mounting portion 325 is a3(a3 is greater than a2, i.e., the back adjustment unit 34 expands more in the TV posture than in the sitting posture). The length dimension of the drive unit 41 is L3(L3 is smaller than L2).

As shown in fig. 9, the lying posture of the seat frame is shown, and the lifting unit 2 is lowered. The first lifting bar 22 of the lifting unit 2 is supported to the transverse support bar 11. The foot adjusting unit 33 is deployed with respect to the lifting unit 32. The lifting unit 32 is relatively lifted and the foot adjustment unit 33 is correspondingly lifted, resulting in a zero gravity-like function. The angle of the back adjustment unit 34 with respect to the seat surface mounting portion 325 is a4(a4 is greater than a3, i.e., the back adjustment unit 34 expands more in the recumbent state than in the TV posture state). The length dimension of the drive unit 41 is L4(L4 is smaller than L1).

When the driving unit 41 is in the extended state, the seat frame is in the standing posture state, and the driving unit 41 is gradually contracted and sequentially switched to the sitting posture state, the TV posture state and the lying posture state. The lifting unit 2 is lifted only in the standing posture and turning state, and is kept still in other states.

Example 2

Referring to fig. 16 to 19, the seat frame of the present embodiment, which is suitable for the geriatric chair, 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, one end of the fifth foot adjustment lever 336 of the foot adjustment unit 33 is hinged to the first end 3231 of the third lift link 323, and the other end thereof is hinged to a middle region of the third foot adjustment lever 333 (the middle region herein refers to a region between the first end 3331 and the second end 3332 of the third foot adjustment lever 333).

Example 3

The geriatric chair of the present embodiment includes the seat frame of

embodiment

1 or 2.

The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A seat frame, comprising:

2. The seat frame according to claim 1, wherein: the second end of the second lifting connecting rod is provided with a sliding groove, the base plate is provided with a corresponding hinge shaft, and the hinge shaft is arranged in the sliding groove.

3. The seat frame according to claim 1, wherein: foot adjusting unit includes that first foot adjusts pole, second foot adjusts pole, third foot adjusts pole, fourth foot adjusts pole and foot's installation department, wherein, the first end of first foot adjust the pole with the first end of third lifting connecting rod is articulated, the second end of first foot adjust the pole with the first end of second foot adjust the pole is articulated, the second end of second foot adjust the pole is articulated with foot's installation department, the first end of third foot adjust the pole with the first end of seat installation department is articulated, the second end of third foot adjust the pole with the first end of fourth foot adjust the pole is articulated, the second end of fourth foot adjust the pole is articulated with foot's installation department.

4. The seat frame according to claim 3, wherein: the second foot adjusting rod and the third foot adjusting rod are provided with a second rotating fulcrum, and the second rotating fulcrum is located in the middle area of the second foot adjusting rod and/or the third foot adjusting rod.

5. The seat frame according to claim 3 or 4, wherein: the foot adjusting unit further comprises a fifth foot adjusting rod, 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.

6. The seat frame according to claim 1, wherein: the backrest adjusting unit comprises a backrest adjusting rod and a backrest installing part, wherein the first end of the backrest adjusting rod is hinged to the base plate, the second end of the backrest adjusting rod is hinged to the backrest installing part, and the backrest installing part is hinged to the second end of the seat installing part.

7. The seat frame according to claim 6, wherein: the backrest adjusting rod comprises a main body part, the first end and the second end of the backrest adjusting rod are respectively located at the two ends of the main body part, and the main body part is respectively bent with the first end of the backrest adjusting rod and the second end of the backrest adjusting rod.

8. The seat frame according to claim 1, wherein: the power unit 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 portion.

9. The seat frame according to claim 1, wherein: the base is provided with a first anti-dumping part and a second anti-dumping part, and one end or two ends of the transverse supporting rod exceed the longitudinal supporting rod to form the first anti-dumping part; the second anti-toppling portion is arranged on the base in a protruding mode 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 supporting frame of the base is 1: 3.5 to 4.5.

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

11. The seat frame according to claim 1, wherein: the chair seat comprises a chair seat installation part and is characterized in that an installation component of a split type structure is arranged on the chair seat installation part, the installation component comprises a first sheet part and a second sheet part, wherein the first sheet part is installed on the chair seat installation part, and the second sheet part is provided with a plurality of installation holes.

12. The seat frame according to claim 3 or 4, wherein: the foot adjusting unit further comprises a fifth foot adjusting rod, 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.