CN116439526A - Lifting chair - Google Patents

Abstract

The invention relates to a lifting chair, which comprises a base assembly and a fixed frame; the fixed frame is assembled on the base component; the fixed frame is connected with a backrest frame in a sliding manner, the bottom of the backrest frame is rotationally connected with a stool assembly, a lifting mechanism is arranged between the fixed frame and the backrest frame, and the lifting mechanism drives the backrest frame to move up and down on the fixed frame so as to drive the stool assembly to lift; according to the lifting chair, the lifting mechanism can efficiently realize different initial heights of the sitting stool of the lifting chair, and meanwhile, the backrest frame is rotationally connected with the sitting stool assembly and is switched between a storage state and a seat supply state; that is, giving the old people in the condition of inconvenient actions more autonomy; helping the elderly to stand up with minimal effort when falling down at home.

Description

Lifting chair

Technical Field

The invention belongs to the technical field of old-helping machines, and particularly relates to a lifting chair.

Background

With the development and progress of science and technology, the living and medical level of people is continuously improved, and the health problem of the body is also concerned, especially the health problem of the old, and the heart of the thousands of children is pulled at any time. According to investigation and research, the muscles and bones in the human body are lost at a certain speed each year along with the increase of the age, and the weight of most of the old is heavy, the requirements on the leg muscles and bones are improved, and once the muscles are lost too much, the old can have the symptoms of weakness of legs and feet, so that the old can fall down.

In order to solve the technical problems, the application number is: CN202211386708.6 discloses a liftable and lowerable chair for helping old people, comprising: a lifting structure and a driving structure; the lifting structure includes: the lifting support plate is of a two-fold movable support rod structure, the small movable shaft is arranged at the two-fold connection part, and the lifting base is rotatably connected with one end of the lifting support plate; the driving structure comprises a servo motor, a flange plate, a driving sprocket, a driven sprocket, a chain and a rotating unit, wherein one side of the flange plate is fixedly provided with the servo motor, the other side of the flange plate is provided with the driving sprocket, the driving sprocket is connected with the driven sprocket through the chain, the driving sprocket and the driven sprocket are respectively provided with the rotating unit, and the rotating unit is connected with the lifting structure.

But this device has the following drawbacks: the base still has certain distance from ground, and the old person can sit on the seat through the power of self standing to certain altitude of arbitrary back of falling down, and is higher to old person's arm strength and shank strength requirement, has reduced ease of use and practicality.

In the patent, the base is applied under the cushion and is mainly used for assisting the old to stand, according to the description of the patent document, the base and the cushion are connected through parts such as a rear support frame, a front support frame, an upper support frame and the like, are a complete whole, can not be split, and the structure which can not be split also causes inconvenience for transportation and storage,

in view of the above-described problems, improvements are needed.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the lifting chair which is simple and reasonable in structure, convenient to store and transport, capable of assisting the fallen old people to stand, and capable of being used as a common conventional chair.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the lifting chair comprises a base assembly and a fixed frame; the fixed frame is assembled on the base component; the base assembly comprises connecting plates fixedly arranged on two sides of the fixed frame, and a base is detachably assembled on the connecting plates; a limit groove mechanism is formed at one side end of the connecting plate, a pin is correspondingly formed at the inner side of the base and is assembled in the limit groove mechanism, and a limit mechanism for fastening the base on the connecting plate is arranged at the outer side of the connecting plate; the fixed frame is connected with a backrest frame in a sliding manner, the bottom of the backrest frame is rotationally connected with a stool assembly, a lifting mechanism is arranged between the fixed frame and the backrest frame, and the lifting mechanism drives the backrest frame to move up and down on the fixed frame so as to drive the stool assembly to lift; the lift chair has an extended state and a collapsed storage state, and when the lift chair is transitioned from the extended state to the collapsed storage state, the bench assembly pivots relative to the back frame such that an upper surface of the bench assembly is brought closer to a front surface of the back frame.

As a preferable mode of the invention, the lifting mechanism comprises a lifting motor fixedly arranged on a fixed frame, the backrest frame is connected with the lifting shaft output end of the lifting motor, and the backrest frame can move up and down along the lifting shaft.

In a preferred mode of the invention, the inner side of the upper part of the backrest frame is symmetrically provided with backrest reinforcing ribs, and the front end of the backrest frame is provided with a backrest.

As a preferable mode of the invention, the two sides of the backrest frame are fixedly provided with the connecting seats, the connecting seats are fixedly provided with the handle seats, and the handle seats are rotationally connected with handrails.

As a preferred mode of the invention, the stool assembly is connected with the backrest frame through a stool connector.

As a preferable mode of the invention, the stool connecting piece comprises a top plate and side plates fixedly arranged on two sides of the top plate, and the front ends of the bottoms of the side plates are downwards provided with mounting plates; roof, curb plate and mounting panel fixed connection, integrated into one piece.

As a preferable mode of the invention, an assembling cavity is formed between the top plate and the two side plates, and the bottom of the backrest frame is fixedly arranged in the assembling cavity; wherein, curb plate and mounting panel level are laid, and the curb plate is all circular arc transition structure with the mounting panel junction upper and lower extreme, forms S type structure between curb plate and the mounting panel.

As a preferable mode of the invention, the front side of the bottom of the mounting plates is in an arc structure, a pivot is assembled between the two mounting plates, the pivot is connected with the upper end of the stool reinforcing rib in a rotating way, and the lower end of the stool reinforcing rib is fixedly arranged at the end part of the stool component.

As a preferred mode of the invention, the bench assembly includes a bench main frame on which a bench is mounted.

As a preferable mode of the invention, the stool reinforcing rib comprises a positioning plate, reinforcing plates assembled on two sides of the positioning plate, and the positioning plate is fixedly connected with the reinforcing plates on two sides and integrally formed.

As a preferable mode of the invention, the bottom of the positioning plate is abutted against the main frame of the stool, the upper end of the reinforcing plate penetrates through the pivot, and the bottom of the reinforcing plate and the bottom of the main frame of the stool are on the same horizontal plane.

As a preferred mode of the invention, when the lifting mechanism is in the initial state and the bench assembly is in the unfolded state, the bench main frame bottom level is lower than the mounting plate bottom level.

As a preferred mode of the present invention, wheels for pushing the elevating chair are installed at the front end of the fixed frame.

As a preferable mode of the invention, the limit groove mechanism comprises a guide groove and a limit groove; the guide groove is downwards opened, the guide groove is obliquely arranged on the connecting plate, the limit groove is communicated with the guide groove, the limit groove is obliquely arranged from top to bottom, and a limit bulge is formed at the joint of the limit groove and the guide groove.

As a preferable mode of the invention, the guide groove is in a horn-shaped structure, and the end part of the guide groove is in an arc-shaped structure.

As a preferable mode of the invention, the fixing frame and the connecting plate are connected through a welding plate with an L-shaped structure.

As a preferable mode of the invention, the limiting mechanism comprises a pressing plate vertically fixed on the outer side of the connecting plate, the pressing plate is attached to the upper surface of the base, a limiting hole is formed on the pressing plate, a through hole corresponding to the limiting hole is formed on the base correspondingly, and bolts are inserted between the through hole and the limiting hole for fastening.

As a preferable mode of the invention, plugs are inserted at two sides of the base.

As a preferable mode of the invention, the two ends of the bottom of the base are provided with the feet, wherein the middle position of the bottom of the base is provided with the feet hanging hooks.

Compared with the prior art, the base assembly and the lifting chair provided by the invention have the following advantages:

1. according to the lifting chair, the lifting mechanism can efficiently realize different initial heights of the sitting stool of the lifting chair, and meanwhile, the backrest frame is rotationally connected with the sitting stool assembly and is switched between a storage state and a seat supply state; that is, giving the old people in the condition of inconvenient actions more autonomy; helping the elderly to stand up with minimal effort when falling down at home.

2. The invention has simple structure, can store and place the whole base assembly through the detachable connection of the connecting plate and the base, is convenient for transportation and improves the space utilization rate.

2. The invention has ingenious design, and the connecting plate and the base are convenient to detach and are connected and fastened by arranging the limit groove mechanism and the limit mechanism to be matched with each other, so that the use safety is ensured.

Drawings

FIG. 1 is a side view of a lift chair according to an embodiment of the present invention;

FIG. 2 is a view showing a use state of the elevating chair according to the embodiment of the present invention;

FIG. 3 is a schematic view of a lifting chair according to an embodiment of the present invention;

FIG. 4 is a schematic view of a stool connector in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of a stool reinforcement according to an embodiment of the present invention;

FIG. 6 is a schematic view (one) of a base assembly according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a base assembly according to an embodiment of the present invention;

FIG. 8 is a schematic view of a structure of a connecting plate according to an embodiment of the present invention;

reference numerals in the drawings: the seat comprises a fixed frame 1, a backrest frame 2, a seat assembly 3, a lifting mechanism 4, a seat connecting piece 5, a seat reinforcing rib 6, a connecting plate 7, a base 8, a limit mechanism 9, a limit groove mechanism 10, a guide groove 11, a limit groove 12, a limit protrusion 13, an arc-shaped structure 14, a plug 15, a welding plate 16, a ground leg 17, wheels 18, a ground leg hook 19, a connecting seat 20, a handle seat 21, an armrest 22, a backrest reinforcing rib 23, a backrest 24, a seat main frame 30, a seat 31, a lifting motor 40, a lifting shaft 41, a top plate 50, a side plate 51, a mounting plate 52, an arc-shaped transition structure 53, an assembly cavity 54, a pivot 55, an arc-shaped structure 56, a positioning plate 60, a reinforcing plate 61, a through hole 80, a pin 81, a pressing plate 90, a limit hole 91, a bolt 92 and a base assembly 100.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Examples:

as shown in fig. 1 to 3, the elevating chair includes a base assembly 100 and a fixed frame 1; the fixed frame 1 is assembled on the base assembly 100; the base assembly 100 comprises connecting plates 7 fixedly arranged at two sides of the fixed frame 1, and bases 8 are detachably assembled on the connecting plates 7; a limit groove mechanism 10 is formed at one side end of the connecting plate 7, a pin 81 is correspondingly formed at the inner side of the base 8, the pin 81 is assembled in the limit groove mechanism 10, and a limit mechanism 9 for fastening the base 8 on the connecting plate 7 is arranged at the outer side of the connecting plate 7; the fixed frame 1 is connected with the backrest frame 2 in a sliding manner, the bottom of the backrest frame 2 is rotationally connected with the stool component 3, a lifting mechanism 4 is arranged between the fixed frame 1 and the backrest frame 2, and the lifting mechanism 4 drives the backrest frame 2 to move up and down on the fixed frame 1 so as to drive the stool component 3 to lift; the lift chair has an extended state and a collapsed storage state, and upon transition of the lift chair from the extended state to the collapsed storage state, the bench assembly 3 is rotated about a pivot 55 relative to the back frame 2 such that the upper surface of the bench assembly 3 is brought closer to the front surface of the back frame 2.

It will be understood by those skilled in the art that in the description of the embodiments of the present invention, the front-back, left-right, up-down directions are all the directions in which the lift chair is normally used, for example, the front direction of the back frame 2, that is, the front direction, the rear direction of the back frame 2, that is, the left direction, that is, the right direction, of the back frame 2.

The fixed frame 1, the back frame 2 and the bench assembly 3 are made of a rigid material rated to withstand the applied forces without bending or incurring other damage; an important aspect of the back frame 2 and the fixed frame 1 is its robustness. In particular, when the elderly sits down on the stool assembly 3, the stool assembly 3 receives a large force with the fixed frame 1. For the comfort and safety of the elderly, it is important that the fixed frame 1 and the back frame 2 maintain a relative positional relationship, including in the case of placing a weight on the bench assembly 3. For this purpose, the backrest frame 2 and the fixed frame 1 may be sufficiently strong steel pipes so that their deformations remain minimal or zero; the fixed frame 1 plays a role in stabilizing at the bottom, steel pipes at two sides of the backrest frame 2 are sleeved in the steel pipes of the fixed frame 1, the backrest frame 2 is driven to move up and down by the lifting mechanism 4, the movement track and the travel are consistent,

the bench assembly 3 can thus be lowered to the ground. The fixing frame 1 and the backrest frame 2 are designed in such a way that the necessary robustness is maintained, while at the same time the ergonomics and the applicability of the device in many different situations are improved; giving the old more autonomy in the case of mobility impairment.

The bench assembly 3 can be raised to a desired height while remaining level to expand the range of applications, specifically, in this embodiment, the bench 31 has a range of travel of 0-500 mm.

According to the lifting chair, the lifting mechanism 4 can efficiently realize different initial heights of the sitting stool of the lifting chair, and meanwhile, the backrest frame 2 is rotatably connected with the sitting stool assembly 3, so that the chair can be switched between a storage state and a seat supply state.

In addition, the stool assembly 3 and the base assembly 100 are matched, and the stool assembly 3 can always bear the supporting force from the base assembly 100, so that the old can be assisted to change from the inverted posture to the standing or sitting posture in the lifting process of the lifting chair.

The invention ensures that the up-and-down adjusting process of the backrest frame 2 and the stool component 3 is more slow and stable by arranging the lifting mechanism 4, is easy to control, has simple structure and is convenient to install and maintain.

In addition, the lifting mechanism 4 is positioned in the middle of the backrest frame 2 and the stool assembly 3, so that the width between the front and the rear of the lifting chair is not occupied, the space utilization rate is high, and the using attractiveness and the storage attractiveness are greatly improved when the lifting chair is folded into a flat shape.

Specifically, the lifting mechanism 4 includes a lifting motor 40 fixed on the fixed frame 1, the backrest frame 2 is connected to an output end of a lifting shaft 41 of the lifting motor 40, and the backrest frame 2 can move up and down along the lifting shaft 41. The lift motor 40 may be electrically connected to a control mechanism, which may be a handle-type structure, through wires for controlling the lift and speed of the lift motor 40.

In particular use, the lift motor 40 drives the back frame 2 and the bench assembly 3 to move upwardly along the lift shaft 41. In the initial position, the bench assembly 3 is generally horizontal and is close to or attached to the ground, and the bench assembly 3 is in a sitting position to assist the elderly, if they fall to the ground, to be unable to get up without assistance. The present lift chair provides support and comfort for the movement of the elderly, as well as assistance that may prove critical in the case of isolated patients.

When the old people struggle to sit on the stool assembly 3 by himself, the stool assembly 3 moves further upwards along with the backrest frame 2 by pressing a control mechanism (not shown), until the old people on the stool assembly 3 are at a reasonable position, the control mechanism is pressed, so that the lifting motor 40 stops working; when the use is finished, the lifting motor 40 drives the backrest frame 2 and the stool assembly 3 to move downwards, and when the stool assembly 3 approaches or is attached to the ground, the lifting motor 40 stops working, and the stool assembly 3 is approximately in a horizontal state, and at this time, the stool assembly 3 is folded and stored.

In the above movement process, the working state of the lifting motor 40 is controlled by a control mechanism (not shown in the figure), and the control mechanism presets information such as the working state and the working time of the lifting motor 40, so that the telescopic amount of the lifting motor 40 just enables the stool assembly 3 to be in the storage state and the seating state. The control mechanism controls the expansion and contraction amount of the lifting motor 40, which belongs to the prior art and will not be described in detail herein. In addition, since the telescopic movement of the lifting motor 40 has more efficient reciprocating movement than the screw rod mechanism, the storage state can be changed into the seat supplying state more quickly, so that a user has better use experience. Of course, the seat-supplying state is changed into the storage state, and the expansion and contraction rate of the lifting motor 40 can be set according to the actual requirement of assisting the user in standing, so as to achieve better experience, and the description is omitted herein.

The lift chair has an extended state and a folded storage state, and when the lift chair is converted from the extended state to the folded storage state, the bench assembly 3 rotates relative to the back frame 2 about the pivot 55 so that the upper surface of the bench assembly 3 approaches the front surface of the back frame 2; when the lifting chair is not used, the lifting chair can be folded into a flat shape, the volume of the whole lifting chair is reduced, and the shape of the lifting chair is changed into a flat shape convenient to store, so that the lifting chair is easy to store.

The upper inner side of the backrest frame 2 is symmetrically provided with backrest reinforcing ribs 23, so that the structural strength and the overall firmness of the whole backrest frame 2 are improved, the use safety is further ensured, and the backrest 24 is arranged at the front end of the backrest frame 2.

The two sides of the backrest frame 2 are fixedly provided with connecting seats 20, the connecting seats 20 are fixedly provided with handle seats 21, and the handle seats 21 are rotatably connected with armrests 22; the patient can rest on the armrest 22 to position himself on the seat 31 of the seat assembly 3. The armrest 22 itself must be strong and support the weight of the elderly. In particular, they should not sag under the weight of the elderly person, and they should not move toward the inside or toward the outside of the bench 31 when the elderly person strives to lift themselves onto the bench assembly 3. The armrests 22 are advantageously fixed to the back frame 2 of the connecting seat 20, with rigidity and solidity that enable them to support the efforts of the elderly.

The armrest 22 is advantageously retractable to facilitate access to the bench 31 by elderly people; the armrest 22 may be pivoted upwardly, for example, from a position where support is available toward a retracted position. Such a retracted position corresponds, for example, to an orientation of the armrests parallel to the longitudinal axis of the side frame in the plane formed by the back frame 2. The position in which support is allowed generally corresponds to the orientation of the armrest 22 parallel to the axis of the bench 31. Is arranged to allow the armrest 22 to rotate from one of a supported and a position. Retracting toward each other. They may, for example, comprise a rotation axis about which the respective armrest 22 may pivot and a slot allowing the armrest 22 to pass between two support positions and a retracted position.

The stool assembly 3 is connected with the backrest frame 2 through a stool connecting piece 5; the whole lifting chair can be folded for storage, the folding mode is that the backrest frame 2 is a fixed point, the folding stool assembly 3 and the base 8 can be simultaneously realized, and the stool assembly 3 can be close to or attached to the ground under the initial state by arranging the stool connecting piece 5.

In this embodiment, the bench assembly 3 is connected to the lower part of the back frame 2 through the bench connector 5 and the bench stiffener 6, and when the lift chair is converted from the unfolded state to the folded state, the connector 3 rotates around the first pivot 11 toward the side of the back frame 2 until the bench assembly 3 is fully abutted against the side of the back frame 2, and the pivot 55 is directly used to enable rotation among the back frame 2, the bench assembly 3 and the bench stiffener 6.

It should be noted that the upper surface of the bench assembly 3 is preferably abutted against the front surface of the backrest frame 2, wherein the "abutment" is to highlight that the lifting chair is compact in the folded and stored state, for example, a gap between two objects abutted against each other may be defined to be less than 8mm, and the gap is preferably less than 5mm or 2mm.

As shown in fig. 4, a schematic structural diagram of the bench connector 5 in this embodiment is shown, specifically, the bench connector 5 includes a top plate 50, side plates 51 fixed on two sides of the top plate 50, and a mounting plate 52 is disposed at the front end of the bottom of the side plate 51 downward; the top plate 50, the side plate 51 and the mounting plate 52 are fixedly connected and integrally formed; the structural strength and the overall firmness of the whole stool connecting piece 5 are improved, and the use safety is further ensured.

An assembling cavity 54 is formed between the top plate 50 and the two side plates 51, and the bottom of the backrest frame 2 is fixedly arranged in the assembling cavity 54; wherein, curb plate 51 and mounting panel 52 level are laid, and curb plate 51 and mounting panel 52 junction upper and lower extreme all are circular arc transition structure 53, set up to be circular arc transition structure 53 and avoided in the use and accomodate the in-process, increase and old man's area of contact when bumping by mistake, and then guarantee the security of use.

The S-shaped structure is formed between the side plate 51 and the mounting plate 52, and the structure is adopted, so that the connection between the stool assembly 3 and the backrest frame 2 is more ingenious, the stool assembly 3 is positioned at the bottom of the backrest frame 2, the stool assembly 3 can be maximally limited to be close to the ground, meanwhile, excessive collision between the stool assembly 3 and the fixed frame 1 is avoided, and meanwhile, the stool assembly 3 can be turned by 0-90 degrees, so that the stool assembly is convenient to store.

The front side of the bottom of the mounting plates 52 is provided with an arc structure 56, a pivot 55 is assembled between the two mounting plates 52, the pivot 55 is rotatably connected with the upper end of the stool reinforcing rib 6, and the lower end of the stool reinforcing rib 6 is fixedly arranged at the end part of the stool assembly 3.

The stool assembly 3 includes a stool main frame 30, and a stool 31 is mounted on the stool main frame 30; the bench 31 may be a fabric or leather or rubber flexible seat or made of synthetic polymer.

As shown in fig. 6, the structure of the seat reinforcing rib 6 in this embodiment is schematically shown, specifically, the seat reinforcing rib 6 includes a positioning plate 60, reinforcing plates 61 assembled on two sides of the positioning plate 60, and the positioning plate 60 is fixedly connected with the reinforcing plates 61 on two sides, and is integrally formed. The structural strength and the integral firmness of the whole stool reinforcing rib 6 are improved, and the use safety is further ensured.

Moreover, the locating plate 60 that sets up is located the junction of stool main frame 30 and stool connecting piece 5 for the design of whole structure is ingenious more, and locating plate 60 is 45 and is connected with stool main frame 30, makes stool main frame 30 more nimble in folding process, and locating plate 60 just supports on leaning on back frame 2.

The bottom of the positioning plate 60 is abutted against the main stool frame 30, the upper end of the reinforcing plate 61 passes through the pivot 55, and the bottom of the reinforcing plate 61 and the bottom of the main stool frame 30 are on the same horizontal plane; by the arrangement, the main stool frame 30 can be close to or attached to the ground, so that the old can conveniently move to the stool.

When the lifting mechanism 4 is in the initial state and the bench assembly 3 is in the unfolded state, the bottom horizontal surface of the bench main frame 30 is lower than the bottom horizontal surface of the mounting plate 52; in particular, the bottom of the bench main frame 30 is lowered to a distance near the horizontal plane of the base 8, for example, about 10-30mm. In this way, the bench main frame 30 can be easily brought into contact with the ground. The thickness of the bench 31 is also thin enough to limit or avoid any obstruction of the patient on the ground. In particular, once the patient on the ground is in a low position, the patient can easily slide onto the stool 31. For this purpose, the thickness of the bench 31 is preferably less than 1cm, preferably less than 5mm. The bench assembly 3 may have a thickness on the order of 1 to 2cm to improve overall structural strength and firmness.

Wheels 18 for pushing the lifting chair are arranged at the front end of the fixed frame 1; and, the wheels 18 are located at the base end face of the front end of the fixed frame 1; thus, when the base 8 is detached from the connection plate 7, the lifting chair can be moved by the wheels 18; furthermore, the wheels 18 are positioned at the front end of the fixed frame 1, and do not occupy space.

The bench assembly 3 is free to switch between a horizontal use condition and an upright storage condition. And, armrests 22 are provided on both sides above the back frame 2 to switch from the horizontal use state to the upright storage state.

Therefore, when the stool assembly 3 and the armrest 22 are folded upward, the elevating chair becomes compact without protrusions when the base 8 is detached from the connection plate 7 of the base assembly, and thus is stored in a small space for easy transportation. And, preferably, the wheels 18 can freely change their rolling direction.

Of course, for the safety of the elderly, a safety belt (not shown) may be provided on the backrest 24 to maintain safety when the stool 31, where the elderly sits, is lifted and lifted, since the elderly cannot accidentally fall off the chair, thereby ensuring safety of use.

Fig. 6-7 are schematic structural diagrams of a base assembly according to an embodiment of the present invention, where a connection board 7 on the base assembly is detachably connected to a base 8, so that the whole base assembly can be stored and placed, which is convenient for transportation and improves space utilization.

As shown in fig. 8, a schematic structural diagram of a connecting plate according to an embodiment of the present invention; wherein, a limit groove mechanism 10 is formed at one side end of the connecting plate 7, and the limit groove mechanism 10 comprises a guide groove 11 and a limit groove 12; the guide groove 11 and the limit groove 12 are communicated, wherein the guide groove 11 is downwards opened, the limit groove 12 is obliquely arranged on the connecting plate 7, the limit groove 12 is communicated with the guide groove 11, the limit groove 12 is obliquely arranged from top to bottom, and a limit protrusion 13 is formed at the joint of the limit groove 12 and the guide groove 11.

In the mounting process of the base component, the guide groove 11 is used for facilitating the pin 81 on the base 8 to enter, the pin 81 slides from the guide groove 1 to the limit groove 12, the limit groove 12 is obliquely arranged from top to bottom, the pin 81 is assembled in the limit groove 12, and the limit protrusion 13 is formed at the joint of the limit groove 12 and the guide groove 11, so that the limit protrusion 13 can limit the pin 81 to move in the vertical or horizontal direction.

The guide groove 11 is in a horn-shaped structure, and is arranged in a horn-shaped structure, so that the opening area of the whole guide groove 11 is increased; the tip of guide way 11 is arc structure 14, sets up arc structure 14 at the guide way 11 tip, and in the pin 81 assembly process, the increase pin 81 and the contact area of the arc structure 14 of guide way 11 have guaranteed assembly safety, have also improved assembly efficiency.

The fixed frame 1 is connected with the connecting plate 7 through a welding plate 16 with an L-shaped structure; the structural strength of the whole base assembly is improved.

The limiting mechanism 9 comprises a pressing plate 90 vertically fixedly arranged on the outer side of the connecting plate 7, the pressing plate 90 is attached to the upper surface of the base 8, a limiting hole 91 is formed in the pressing plate 90, a through hole 80 corresponding to the limiting hole 91 is formed in the base 8 correspondingly, and bolts are inserted between the through hole 80 and the limiting hole 91 for fastening.

Plugs 15 are inserted at two sides of the base 8; the plug 15 is made of insulating or plastic materials, and the plug 15 can be used for enabling the whole base 8 to be in a sealed state, so that an attractive effect is achieved.

The bottom both ends of base 8 are installed lower margin 17, and wherein, the bottom intermediate position of base 8 is equipped with lower margin couple 16.

According to the invention, four feet 17 are arranged, the base 8 can be inclined within a preset height range, so that the whole base assembly is slightly inclined forwards, the old man can be conveniently assisted to move to the lifting chair, the height of the base assembly can be adjusted by the four feet 17, the stress of the base assembly is more uniform, and in addition, as the feet are assembled at the lower part of the base 8, a certain vibration energy can be consumed, so that the effect of relieving vibration is achieved.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more herein: the terms of the fixed frame 1, the backrest frame 2, the stool assembly 3, the lifting mechanism 4, the stool connector 5, the stool reinforcement 6, the connecting plate 7, the base 8, the limit mechanism 9, the limit groove mechanism 10, the guide groove 11, the limit groove 12, the limit projection 13, the arc-shaped structure 14, the plug 15, the welding plate 16, the ground feet 17, the wheels 18, the ground foot hooks 19, the connecting seat 20, the handle seat 21, the armrest 22, the backrest reinforcement 23, the backrest 24, the stool main frame 30, the stool 31, the lifting motor 40, the lifting shaft 41, the top plate 50, the side plate 51, the mounting plate 52, the arc-shaped transition structure 53, the assembly cavity 54, the pivot 55, the arc-shaped structure 56, the positioning plate 60, the reinforcing plate 61, the through hole 80, the pin 81, the pressing plate 90, the limit hole 91, the bolt 92, the base assembly 100, etc. are not excluded from the possibility of using other terms; these terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.

Claims (10)

1. Lifting chair, its characterized in that: comprises a base assembly (100) and a fixed frame (1); the fixed frame (1) is assembled on the base assembly (100); the base assembly (100) comprises connecting plates (7) fixedly arranged on two sides of the fixed frame (1), and bases (8) are detachably assembled on the connecting plates (7); a limit groove mechanism (10) is formed at one side end part of the connecting plate (7), a pin (81) is correspondingly formed at the inner side of the base (8), the pin (81) is assembled in the limit groove mechanism (10), and a limit mechanism (9) for fastening the base (8) on the connecting plate (7) is arranged at the outer side of the connecting plate (7); the fixed frame (1) is connected with the backrest frame (2) in a sliding manner, the bottom of the backrest frame (2) is rotationally connected with the stool component (3), a lifting mechanism (4) is arranged between the fixed frame (1) and the backrest frame (2), and the lifting mechanism (4) drives the backrest frame (2) to move up and down on the fixed frame (1) so as to drive the stool component (3) to lift; the lift chair has an extended state and a folded storage state, and when the lift chair is converted from the extended state to the folded storage state, the bench assembly (3) is rotated about a pivot (55) relative to the back frame (2) such that an upper surface of the bench assembly (3) is brought close to a front surface of the back frame (2).

2. The lift chair of claim 1 wherein: the lifting mechanism (4) comprises a lifting motor (40) fixedly arranged on the fixed frame (1), the backrest frame (2) is connected with the output end of a lifting shaft (41) of the lifting motor (40), and the backrest frame (2) can move up and down along the lifting shaft (41).

3. The lift chair of claim 2 wherein: backrest reinforcing ribs (23) are symmetrically arranged on the inner side of the upper part of the backrest frame (2), and a backrest (24) is arranged at the front end of the backrest frame (2); connecting seats (20) are fixedly arranged on two sides of the backrest frame (2), handle seats (21) are fixedly arranged on the connecting seats (20), and handrails (22) are rotatably connected to the handle seats (21).

4. The lift chair of claim 1 wherein: the stool assembly (3) is connected with the backrest frame (2) through a stool connecting piece (5); the stool connecting piece (5) comprises a top plate (50) and side plates (51) fixedly arranged on two sides of the top plate (50), and mounting plates (52) are downwards distributed at the front ends of the bottoms of the side plates (51); the top plate (50), the side plate (51) and the mounting plate (52) are fixedly connected and integrally formed.

5. The lift chair of claim 4 wherein: an assembling cavity (54) is formed between the top plate (50) and the two side plates (51), and the bottom of the backrest frame (2) is fixedly arranged in the assembling cavity (54); the side plates (51) and the mounting plates (52) are horizontally arranged, the upper ends and the lower ends of the joints of the side plates (51) and the mounting plates (52) are all in arc transition structures (53), and an S-shaped structure is formed between the side plates (51) and the mounting plates (52).

6. The lift chair of claim 5 wherein: the front sides of the bottoms of the mounting plates (52) are in arc structures (56), a pivot (55) is assembled between the two mounting plates (52), the pivot (55) is rotationally connected with the upper end of a stool reinforcing rib (6), and the lower end of the stool reinforcing rib (6) is fixedly arranged at the end part of the stool component (3); the stool reinforcing rib (6) comprises a positioning plate (60), reinforcing plates (61) assembled on two sides of the positioning plate (60), and the positioning plate (60) is fixedly connected with the reinforcing plates (61) on two sides and integrally formed.

7. The lift chair of claim 6 wherein: the bottom of the positioning plate (60) is abutted against the stool main frame (30), the upper end of the reinforcing plate (61) penetrates through the pivot (55), and the bottom of the reinforcing plate (61) and the bottom of the stool main frame (30) are on the same horizontal plane.

8. The lift chair of claim 1 wherein: the limit groove mechanism (10) comprises a guide groove (11) and a limit groove (12); the guide groove (11) is communicated with the limit groove (12), wherein the guide groove (11) is downwards opened, the limit groove (12) is obliquely arranged on the connecting plate (7), the guide groove (11) is communicated with the limit groove (12), the limit groove (12) is obliquely arranged from top to bottom, and a limit bulge (13) is formed at the joint of the limit groove (12) and the guide groove (11).

9. The lift chair of claim 8 wherein: the guide groove (11) is of a horn-shaped structure, and the end part of the guide groove (11) is of an arc-shaped structure (14).

10. The lift chair of claim 1 wherein: the limiting mechanism (9) comprises a pressing plate (90) vertically fixedly arranged on the outer side of the connecting plate (7), the pressing plate (90) is attached to the upper surface of the base (8), a limiting hole (91) is formed in the pressing plate (90), a through hole (80) corresponding to the limiting hole (91) is formed in the base (8) corresponding to the limiting hole, and a bolt (92) is inserted between the through hole (80) and the limiting hole (91) for fastening.