CN111134475A

CN111134475A - Power-assisted chair with armpit supporting device

Info

Publication number: CN111134475A
Application number: CN202010067287.5A
Authority: CN
Inventors: 黄诗展; 余裕浩; 杨瀚林; 姜峰
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-05-12
Anticipated expiration: 2040-01-20

Abstract

The invention provides a booster chair with an underarm support device, which relates to the technical field of seat devices and comprises: a seat supporting part, a seat part, a backrest part and a supporting part; the seat supporting part is provided with a horizontal placing platform; the seat part is provided with a seat cavity, and the seat part can be arranged on the horizontal placing platform in a turnover way; the backrest part is arranged at one end of the seat part far away from the seat supporting part in a turnover way, and the backrest parts are vertically arranged relative to the horizontal placing table; the supporting parts comprise armpit supporting plates and linkage mechanisms; the armpit supporting plate is assembled on the backrest part through the linkage mechanism, the seat part is in a vertical state, the linkage mechanism controls the armpit supporting plate to relatively protrude in the horizontal direction and transversely arrange on the backrest part, so that the armpit supporting plate is in a use state capable of supporting the armpits of a user and is used for supporting the weight of the upper half of the body of the user and avoiding accidents such as falling down. The seat portion is in the state of keeping flat, and link gear control armpit layer board is relative along vertical direction with leaning against a portion parallel placement for the armpit layer board is in the state of dodging of keeping away from the user relatively and interferes in order to reduce.

Description

Power-assisted chair with armpit supporting device

Technical Field

The invention relates to the technical field of seat devices, in particular to a power-assisted chair with an underarm support device.

Background

Along with the aging and the aging of the population in China, the number of disabled and sick old people in China is increasing. In life, people often see wounded people, old people and severe patients, and the physical strength of the people is very weak, so that the people are very inconvenient to move. Especially, the old suffering from chronic diseases such as arthritis, lumbar disc herniation and the like can seriously affect the old to sit up. These people often do not stand up after sitting for a long time and do not have enough strength in their legs to support their bodies.

The prior seat auxiliary product is still in a primary stage, the innovation is not outstanding enough, the function form is complicated, the device is large and heavy, the cost is high, and the common family can not be used under economic conditions at all. Most of the auxiliary seats on the market lift the pelvis of the old through the overturning of the seat plate, but have no supporting force on the weight of the upper body, so that when the old is likely to get up, the old bends due to insufficient knee force, and the whole body slides to the ground, thereby causing accidents.

Disclosure of Invention

The invention discloses a power-assisted chair with an underarm support device, which is simple in structure and convenient to operate and aims to solve the problem that the conventional power-assisted chair is lack of auxiliary support.

The invention adopts the following scheme:

a booster chair with underarm support means comprising: a seat support portion, a seat portion, a backrest portion, and a support portion; the seat supporting part is provided with a horizontal placing platform; a seat portion which is arranged on the horizontal placement table in a reversible manner, the seat portion having a standing state in which the seat portion is vertically arranged on the horizontal placement table and a lying state in which the seat portion is horizontally arranged on the horizontal placement table; the backrest part is arranged at one end of the seat part far away from the seat supporting part in a turnover manner, and when the seat part is in a vertical state or a horizontal state, the backrest parts are vertically arranged relative to the horizontal placing table for a user to lean against; the supporting parts are arranged at the left side and the right side of the backrest part and used for supporting the armpits of a user; the supporting parts comprise armpit supporting plates for supporting armpits and linkage mechanisms for controlling the armpit supporting plates to be switched between a use state and an avoiding state; the armpit supporting plate is assembled on the backrest part through the linkage mechanism, the seat part is in a vertical state, and the linkage mechanism controls the armpit supporting plate to relatively protrude in the horizontal direction and transversely arrange on the backrest part, so that the armpit supporting plate is in a use state capable of supporting the armpits of a user; the seat part is in a flat state, the armpit supporting plate is controlled by the linkage mechanism to be relatively placed in parallel with the backrest part along the vertical direction, and the armpit supporting plate is in an avoiding state relatively far away from a user.

As a further improvement, the linkage mechanism comprises a frame arranged on the backrest part, a support rod and a long connecting rod which are respectively hinged and arranged at two ends of the frame, and a short connecting rod which connects the support rod and the long connecting rod; the armpit supporting plate is arranged at one end, far away from a hinge point, of the supporting rod, the long connecting rod is a stressed rod, and an avoiding groove is formed in the long connecting rod and used for accommodating the supporting rod in a penetrating mode, so that the supporting rod and the long connecting rod are crossed along the rack and mutually avoid to rotate; the short connecting rods are hinged between the supporting rods and the long connecting rods, the long connecting rods are controlled by external force, so that the long connecting rods drive the short connecting rods to rotate to be accommodated in the avoiding grooves and perpendicular to the supporting rods, the hinge points of the long connecting rods and the rack, the hinge points of the short connecting rods and the supporting rods, and the hinge points of the long connecting rods and the short connecting rods are located on the same straight line position, and at the moment, the supporting rods are arranged on the backrest portion in a protruding mode relatively in the horizontal direction, so that the armpit supporting plate is in a use state.

As a further improvement, the control of the long connecting rod by external force is released, and the supporting rod is subjected to the self gravity of the axillary supporting plate arranged at the end part of the supporting rod, so that the short connecting rod is driven to rotate, the long connecting rod is driven to rotate until the supporting rod approximately stands along the vertical direction, and the axillary supporting plate is in an avoiding state.

As a further improvement, the length of the avoidance groove is at least greater than the sum of the length of the short connecting rod and the width of the supporting rod.

As a further improvement, one end of the rack is provided with a limiting rod along the vertical direction, and the limiting rod is used for relatively abutting and supporting the long connecting rod in the use state.

As a further improvement, the upper end surface of the armpit supporting plate is in an arc shape which is suitable for the armpit of a user, and the height of the armpit supporting plate relative to the supporting rod is adjustable.

As a further improvement, the seat supporting part comprises a front supporting leg and a rear supporting leg, and at least four supporting legs are arranged so as to stably place the seat supporting part; the front end face where the front supporting leg is located is provided with a pedal part capable of lifting and moving, the pedal part is linked with the supporting part, and therefore the armpit supporting plate of the supporting part is correspondingly switched between a use state and an avoidance state by controlling lifting of the pedal part.

As a further improvement, a pull rope is connected between the support portion and the pedal portion, one end of the pull rope is connected to the long connecting rod, the other end of the pull rope is connected to the pedal portion along the backrest portion and the seat portion, and the pull rope drives the long connecting rod to rotate along a hinge point of the long connecting rod and the frame through the lifting movement of the pedal portion.

As a further improvement, the pedal part comprises a pedal and a backup plate which are L-shaped; the backrest plate is vertically arranged relatively, and a sliding assembly for driving the pedal part to move up and down along the vertical direction is arranged between the backrest plate and the seat supporting part; the sliding assembly comprises a sliding rail vertically arranged on the seat supporting part and a sliding seat arranged on the sliding rail in a sliding manner, and the backup plate is fixedly connected with the sliding seat; the lower end face of the pedal is provided with a spring, and the spring is abutted to the pedal to provide elastic force for the pedal to move upwards along the vertical direction, so that the pedal is driven to move upwards.

As a further improvement, the pulling rope is a steel wire rope, and the steel wire rope is always in a stretching state by switching between a standing state and a flat state through the seat part so as to provide a pulling force for linkage between the pedal part and the support part.

By adopting the technical scheme, the invention can obtain the following technical effects:

the utility model provides a booster seat, through can overturn the seat portion of configuration on the seat props portion and can overturn the upset cooperation of leaning on between the portion of configuration on the seat portion for seat portion switches between erectting the state and the state of putting, corresponds the auxiliary user and stands or sits down, and leans on the portion and place the vertical setting of platform with the level all the time and supply the user to lean on the use, and the operation is convenient and the practicality is strong. Wherein, the left and right sides of backing to the portion is equipped with the supporting part that is used for supporting user's armpit, and the armpit supporting plate of supporting part switches between user state and dodge the state under link gear's control to when the state was in the state of erectting at the seat portion, the user stood in the seat portion of relative vertical setting, back to portion one side, place on the armpit supporting plate of relative protrusion and horizontal back to portion along the horizontal direction relatively through its armpit, with the weight of support user's upper half body, avoid taking place to fall down accidents such as. When the seat portion is in the state of keeping flat, the user sits on the seat portion and leans on the portion of leaning on, and the link gear control armpit layer board is placed along vertical direction relatively and leaning on portion mutual parallel for armpit layer board is in the state of dodging of keeping away from the user relatively, and the user of being convenient for sits down the back and leans on in leaning on the portion. The supporting part is relatively protruded and transversely arranged on the backrest part when in use, and is relatively retracted when not in use so as to reduce the problems of interference and the like to users.

Furthermore, the frame of the linkage mechanism is fixedly arranged on the backrest part, two ends of the frame are respectively hinged with the support rod and the long connecting rod, and a short connecting rod is hinged between the support rod and the long connecting rod. Wherein, the armpit supporting plate configuration is kept away from the one end of its pin joint at the bracing piece, bracing piece and long connecting rod are along alternately and dodging the rotation each other between the frame, and long connecting rod is the atress pole, it is controlled by external force, so that long connecting rod drives short connecting rod and rotates to holding in the groove of dodging of long connecting rod and mutually perpendicular with the bracing piece, it corresponds with it, the pin joint of long connecting rod and frame, the pin joint of short connecting rod and bracing piece, the pin joint of long connecting rod and short connecting rod, three pin joint is in same linear position, link gear is in the dead point position, the bracing piece is arranged back to the portion along the horizontal direction protrusion relatively this moment, so that the armpit supporting plate is in the user state, because link gear is in the dead point position this moment, the armpit supporting plate on the bracing. Until the external force is relieved to the control of long connecting rod, the bracing piece receives the armpit board self gravity of its tip configuration to drive short connecting rod and rotate, and then drive long connecting rod and rotate, keep static until the bracing piece roughly along vertical direction, so that the armpit board is in the state of dodging.

Furthermore, the front end face where the front supporting leg of the seat supporting part is located is provided with a pedal part capable of lifting and moving, and a pull rope is connected between the pedal part and the supporting part to realize mutual linkage. The spring that the footboard portion ascended and move is provided to the terminal surface configuration under the footboard of pedal portion, and the user is when not using, and the spring upwards drives pedal portion and reaches certain height, and the stay cord does not provide long connecting rod pulling force this moment for the armpit holds in the palm is in dodges the state. When the user uses the seat, through standing on pedal portion for pedal portion descends to subaerial along vertical direction, and the stay cord is under pedal portion's drive this moment, the long connecting rod of pulling, provides outside pulling force for long connecting rod, makes it rotate dead point position, corresponds the armpit layer board and is in the user state, supplies user armpit under bracing. Until the seat portion upset to the state of keeping flat, and the back of the body portion corresponds vertical setting, user's focus shifts to the seat portion this moment on, the spring promotes the footboard and rises along vertical direction and removes, makes the user both feet to move up simultaneously and corresponds the suitable position of sitting of adjustment, and the outside pulling force to long connecting rod is relieved to the stay cord this moment, and armpit board self gravity through its tip configuration of bracing piece drives rotation each other between bracing piece, long connecting rod and the short connecting rod, so that the armpit board is in and dodges the state.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a power-assisted chair according to embodiment 1 of the invention, in a first view, wherein a seat part is in an upright state;

fig. 2 is a schematic structural view of a booster chair according to embodiment 1 of the present invention, in a second viewing angle, in which a seat portion is in a flat state;

FIG. 3 is a schematic view of the structure of FIG. 1 from another perspective, wherein G represents the position of the center of gravity of the user;

FIG. 4 is a schematic view of the structure of FIG. 1 from another perspective;

FIG. 5 is a schematic view of the seat portion of FIG. 3 in a flat position;

FIG. 6 is a schematic structural view of a support part of the booster chair according to embodiment 1 of the present invention, in which the direction of the arrow indicates the direction of the tensile force applied to the long link;

fig. 7 is a schematic structural view of a booster chair according to embodiment 1 of the present invention, in a third viewing angle, in which a seat portion is in a flat state;

FIG. 8 is a schematic diagram of the structure of FIG. 5 in another embodiment;

FIG. 9 is a schematic view of the structure of FIG. 8 from another perspective;

fig. 10 is a schematic structural view of a booster chair according to embodiment 2 of the present invention in a first perspective view, in which a seat portion is in an upright state;

FIG. 11 is an enlarged view of a portion of the area I of FIG. 10;

fig. 12 is a schematic structural view of a booster chair according to embodiment 2 of the present invention in a second viewing angle, in which a seat portion is laid flat;

fig. 13 is a partially enlarged view of the region II in fig. 12.

Icon: 1-a seat supporting part; 11-a horizontal placing table; 12-a leg; 121-front leg; 122-rear leg; 13-a cross beam; 14-mounting a rod; 2-a seat portion; 21-a seat cavity; 3-backrest part; 4-a support part; 41-axillary splint; 42-a linkage mechanism; 421-a frame; 422-support rods; 423-long connecting rod; 4231-avoidance groove; 424-short link; 425-a stop lever; 426-a connecting rod; 43-a leaf spring sleeve; 5-a linkage mechanism; 51-a driving lever; 52-a first link; 53-a second link; 54-a third link; 6-a pushing mechanism; 61-electric push rod; 7-a pedal part; 71-a pedal; 72-a backup plate; 8-a sliding assembly; 81-sliding rails; 82-a slide carriage; 9-pulling a rope; 10-spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

With reference to fig. 1 to 4, the present embodiment provides a power-assisted chair with an under-arm support device, comprising: a seat supporting part 1, a seat part 2, a backrest part 3 and a supporting part 4.

Wherein the seat support portion 1 has a horizontal platform 11. In the present embodiment, the seat supporting portion 1 includes a front leg 121 and a rear leg 122, and at least four legs are provided to stably place the seat supporting portion 1. All be connected with crossbeam 13 between the landing leg 12, crossbeam 13 locates the top of each landing leg 12, and encloses between crossbeam 13 and close and form this horizontal platform 11 of placing. Preferably, each of the legs 12 and the beams 13 is made of aluminum profile, so that the legs are light and convenient to disassemble, assemble and transport.

The seat section 2 is arranged on the horizontal platform 11 so as to be turnable, and the seat section 2 has a standing state vertically arranged on the horizontal platform 11 and a lying state horizontally arranged on the horizontal platform 11. The backrest part 3 is arranged at one end of the seat part 2 far away from the seat supporting part 1 in a turnover way, and when the seat part 2 is in a vertical state or a horizontal state, the backrest parts 3 are vertically arranged relative to the horizontal placing platform 11 for a user to lean against. Through the upset cooperation between the seat portion 2 of configuration on the seat portion 1 that can overturn and the back portion 3 of configuration on seat portion 2 that can overturn for seat portion 2 switches between erect state and the state of putting, corresponds the auxiliary user and stands or sits down, and places the vertical setting of platform 11 with the level all the time to lean against portion 3 and supply the user to lean on the use, and the operation is convenient and the practicality is strong. It should be noted that the seat portion 2 and the backrest portion 3 which are arranged in an inverted manner are unfolding and rotating functions of the existing folding chair, and a connecting piece such as an opening hinge or a movable hinge may be arranged between the seat portion 2 and the backrest portion 3, so that the folding state of the seat portion 2 and the backrest portion 3 on the seat supporting portion 1 is realized through artificial force application, which is not described herein again. The tilting control of the seat portion 2 by the link mechanism 5 and the pushing mechanism 6 will be described in detail further later.

The support portions 4 are disposed on both left and right sides of the backrest portion 3 to support the armpits of the user. The support portions 4 each include an armpit support plate 41 for supporting an armpit and a link mechanism 42 for controlling the armpit support plate 41 to be switched between a use state and an avoidance state. The armpit supporting plate 41 is assembled on the backrest part 3 through the linkage mechanism 42, the seat part 2 is in an upright state, the linkage mechanism 42 controls the armpit supporting plate 41 to relatively protrude in the horizontal direction and transversely arrange on the backrest part 3, and the armpit supporting plate 41 is in a use state capable of supporting armpits of a user. The seat part 2 is in a flat state, and the link gear 42 controls the armpit supporting plate 41 to be relatively placed in parallel with the backrest part 3 along the vertical direction, so that the armpit supporting plate 41 is in an avoiding state relatively far away from a user. The support portion 4 is relatively protruded and horizontally placed on the backrest portion 3 when in use, and is relatively retracted when not in use. When seat portion 2 is in the state of erectting, the user stands in seat portion 2, the 3 one sides of back of the body portion of relative vertical setting, places relatively along the relative protrusion of horizontal direction and transversely on the armpit layer board 41 of back of the body portion 3 through its armpit to support user's upper half body weight, avoid taking place accidents such as falling. When the seat portion 2 is in a flat state, the user sits on the seat portion 2 and leans against the backrest portion 3, and at the moment, the linkage mechanism 42 controls the armpit supporting plate 41 to be relatively placed in parallel with the backrest portion 3 along the vertical direction, so that the armpit supporting plate 41 is in an avoiding state relatively far away from the user, and the user can lean against the backrest portion 3 after sitting down.

Referring to fig. 3 to 7, the linkage mechanism 42 includes a frame 421 disposed on the backrest 3, a support rod 422 and a long link 423 respectively hinged to two ends of the frame 421, and a short link 424 connecting the support rod 422 and the long link 423. The armpit supporting plate 41 is disposed at an end of the supporting rod 422 away from the hinge point thereof, and the long connecting rod 423 is provided with an avoiding groove 4231 for accommodating the short connecting rod 424 and penetrating the supporting rod 422, so that the supporting rod 422 and the long connecting rod 423 are crossed and mutually avoid rotating along the frame 421. The short link 424 is hinged between the support rod 422 and the long link 423, the long link 423 is a stressed rod, and the long link 423 is controlled by an external force, so that the long link 423 drives the short link 424 to rotate to be accommodated in the avoiding groove 4231 and perpendicular to the support rod 422. When the long link 423 rotates to the hinge point of the long link 423 and the frame 421, the hinge point of the short link 424 and the support rod 422, and the hinge point of the long link 423 and the short link 424 under the pulling of an external force, the three hinge points are located at the same straight position, so that the linkage mechanism 42 is located at the dead point position, and at this time, the support rod 422 protrudes relatively in the horizontal direction to the backrest portion 3, so that the armpit support plate 41 is in the use state. Since the linkage 42 is now in the dead center position, the armpit support plate 41 on the support bar 422 can withstand the large pressing force provided by the user's armpit. Until the pulling of the external force on the long connecting rod 423 is released, the supporting rod 422 receives the self gravity of the armpit supporting plate 41 configured at the end part thereof, so as to drive the short connecting rod 424 to rotate, further drive the long connecting rod 423 to rotate, until the supporting rod 422 approximately stands along the vertical direction, so as to enable the armpit supporting plate 41 to be in an avoiding state.

Specifically, the length of the avoidance groove 4231 is at least greater than the sum of the length of the short link 424 and the width of the support rod 422, so that the short link 424 can be accommodated in the avoidance groove 4231, the support rod 422 penetrates through the avoidance groove 4231, intersects with the long link 423 along the frame 421 and rotates in an avoidance manner, when the linkage mechanism 42 is located at a dead point position, the support rod 422 drives the short link 424 to be accommodated in the avoidance groove 4231, a hinge point of the long link 423 and the frame 421, a hinge point of the short link 424 and the support rod 422, and a hinge point of the long link 423 and the short link 424 are located at the same straight line position. It should be noted that, in other embodiments, the long link 423 may also be composed of two plate bodies hinged to two outer end surfaces of the same end of the frame 421, respectively, a gap is formed between the two plate bodies for the support rod 422 to pass through, and the short link 424 with one end hinged to an inner end surface of the other end of the two plate bodies may be accommodated, so that the link rod body rotates to the dead point position relatively, and the relative limit support of the support rod 422 along the pressing direction is facilitated.

Furthermore, a limiting rod 425 is disposed at one end of the frame 421 along the vertical direction, and the limiting rod 425 is used to relatively abut against and support the long connecting rod 423 in the use state. The limiting rod 425 is vertically arranged on one side of a hinge point of the frame 421 and the long connecting rod 423, so that the long connecting rod 423 at the dead point is just abutted to the limiting rod 425, and the long connecting rod 423 is prevented from being continuously pulled to rotate (rotate counterclockwise in the drawing) by external force, and the armpit supporting plate 41 is further stably supported for use.

Preferably, the upper end surface of the armpit support plate 41 is in a radian which is adapted to the armpit of the user, so that the armpit support plate accords with the human engineering and improves the comfort of armpit support. In this embodiment, the height of the armpit supporting plate 41 relative to the supporting rod 422 is adjustable, the armpit supporting plate 41 is assembled at one end of the supporting rod 422 through the elastic sheet type sleeve 43, the armpit supporting plate is arranged on the supporting rod 422 through the sleeve, the armpit supporting plate 41 is connected to the elastic sheet, the elastic sheet is sleeved in the sleeve relatively to achieve the height adjustment between the armpit supporting plate 41 and the supporting rod 422, the armpit supporting plate is suitable for users with different heights, and the applicability is high. It should be noted that, in other embodiments, the present invention may also be implemented by a telescopic rod or an adjusting member.

Referring to fig. 5 to 9, a pedal 7 capable of moving up and down is disposed on the front end surface of the front leg 121. The pedal portion 7 is linked with the support portion 4, so that the armpit support plate 41 of the support portion 4 is switched between a use state and a retreat state by controlling the lifting of the pedal portion 7.

In particular, the pedal portion 7 and the support portion 4 are interlocked with each other. A pull rope 9 is connected between the supporting portion 4 and the pedal portion 7, one end of the pull rope 9 is connected to the long connecting rod 423, the other end of the pull rope 9 is connected to the pedal portion 7 along the backrest portion 3 and the seat portion 2, and the pull rope 9 drives the long connecting rod 423 to rotate along a hinge point between the long connecting rod 423 and the rack 421 through the lifting movement of the pedal portion 7, so that the supporting rod 422 correspondingly drives the armpit supporting plate 41 to switch between a use state and an avoiding state. In the present embodiment, the footrest section 7 includes a pedal 71 and a backup plate 72 in an L-shape. The backup plate 72 is vertically arranged relatively, and a sliding assembly 8 for driving the pedal portion 7 to move up and down along the vertical direction is arranged between the backup plate 72 and the seat supporting portion 1. The slide module 8 comprises a slide rail 81 arranged vertically on the seat support 1 and a slide carriage 82 arranged slidably on the slide rail 81, the backrest plate 72 being fixedly connected to the slide carriage 82. The lower end surface of the pedal 71 is provided with a spring 10, and the spring 10 abuts against the pedal 71 to provide an elastic force for the ascending movement of the pedal portion 7 along the vertical direction, so as to drive the pedal portion 7 to ascend. When the pedal 71 is not pressed downwards by a user when standing, the pedal 71 is driven by the sliding base 82 to move upwards along the sliding rail 81 until reaching a certain height under the action of the elastic force of the spring 10, at this time, the pull rope 9 does not provide the pull force of the long connecting rod 423, and the armpit supporting plate 41 at one end of the supporting plate is in an avoiding state under the action of the self gravity of the armpit supporting plate 41.

More preferably, the pull cord 9 is a steel cord. The steel wire rope has certain elastic force and rigidity, and is switched between a vertical state and a horizontal state through the seat part 2, and the steel wire rope is always in a stretching state to provide tension for linkage between the pedal part 7 and the support part 4. In this embodiment, one end of the steel wire rope is fixedly connected to the pedal portion 7, and the other end of the steel wire rope is arranged along the outer frame of the booster chair until being connected to the long connecting rod 423 of the supporting portion 4, and is fixedly connected to one side of the long connecting rod 423 rod far away from the hinge point of the long connecting rod 423 rod and the frame 421, so that when the pedal portion 7 receives external pressing force (pedaling force of two feet of a user), the steel wire rope always in a tight state provides pulling force for the rotation of the long connecting rod 423, the linkage mechanism 42 rotates to the dead point position, and the armpit support plate 41 is in a use state. When the pedal portion 7 is not pressed by the external force, the pedal portion 7 is pushed by the spring 10 to move upward, and the pulling force (force to move to the dead point position) of the wire rope to the long link 423 is released, so that the link mechanism 42 relatively rotates by the weight of the armpit plate 41, and the armpit plate 41 is in the retreated state.

The rope 9 may be disposed on the outer frame of the booster chair by correspondingly forming guide holes (not shown) in the outer frame of the booster chair, and the rope 9 may be inserted into each guide hole to achieve a tight connection between the pedal portion 7 and the long link 423. The guide wheels may be provided along the pulling path of the rope 9, and the rope 9 may be closely disposed on the guide end surfaces of the guide wheels, so that the connection of the rope 9 between the foothold 7 and the long link 423 is realized, and the long link 423 may be pulled in accordance with the guide.

Furthermore, the two support parts 4 are linked by a connecting rod 426, wherein the connecting rod 426 is connected between the two long connecting rods 423, so that the two support parts 4 are synchronously in a use state or an avoiding state. Preferably, the connecting rod 426 is disposed at one end of the two long links 423 away from the hinge point with the frame 421, and one end of the pull rope 9 is tied to the connecting rod 426, so that the long links 423 are rotated by pulling the connecting rod 426.

The power chair of the embodiment works as follows:

when the user is not in use, the spring 10 drives the pedal portion 7 upwards to a certain height, and at the moment, the pull rope 9 does not provide a pulling force for the long connecting rod 423, and the armpit plate 41 is in a retreating state. When the user uses the seat, through relying on seat portion 2 and back portion 3, and stand on pedal portion 7 for pedal portion 7 descends to subaerial along vertical direction, and stay cord 9 pulls long connecting rod 423 under pedal portion 7's drive this moment, provides outside pulling force for long connecting rod 423, makes it rotate to the dead point position, corresponds armpit layer board 41 and is in user state, supplies user armpit under bracing. Until the seat part 2 is turned to a flat state, and the backrest part 3 is vertically arranged correspondingly, the gravity center of the user is transferred to the seat part 2, the spring 10 pushes the pedal 71 to ascend and move along the vertical direction, meanwhile, the two feet of the user move upwards to correspondingly adjust the proper sitting posture, and the pull rope 9 removes the external pulling force on the long connecting rod 423 at the moment so that the armpit support plate 41 returns to the avoiding state. Until the user needs to stand, the gravity center of the user returns to the feet, the pedal part 7 is pressed to the ground, and the armpit supporting plate 41 returns to the using state for supporting the user to get up.

Example 2

With reference to fig. 10 to 13, in the present embodiment, the seat portion 2 and the backrest portion 3 are arranged to be turned over. The link mechanism 5 includes at least an active lever 51, a first link 52, a second link 53, and a third link 54. The seat portion 2 is connected to the active lever 51 so as to follow the relative movement of the active lever 51. The third link 54 is a frame of the link mechanism 5, and the active lever 51 and the second link 53 rotate along the frame 421 to switch the seat 2 disposed on the active lever 51 between the upright state and the flat state. Backrest portion 3 links to each other with first connecting rod 52, and backrest portion 3 is in the state of erectting or when keeping flat the state at seat portion 2, and the platform 11 vertical setting is placed to the level of homogeneous phase, rotates along third connecting rod 54 via pushing mechanism 6 drive active lever 51 for seat portion 2 is in the state of erectting and changing between the state of keeping flat, corresponds supplementary user and stands or sits down, and is used for controlling opening of pushing mechanism 6 through control mechanism and stops, and then realizes seat portion 2 and backrest portion 3's upset linkage. The specific arrangement of the pusher mechanism and the control mechanism will be described in further detail below.

Further, the linkage 5 is a parallelogram linkage 5. The third link 54 is extended and fixed to one of the front legs 121 to serve as a fixed frame in the link mechanism 5. The driving rod 51 is a stressed rod in the link mechanism 5, and the driving rod 51 and the second link 53 are adapted to the cross beam 13, so that the driving rod 51 is forced by external force to rotate to be horizontally disposed on the corresponding cross beam 13, thereby driving the seat portion 2 to be in a flat state. In the present embodiment, the active lever 51 has one end connected to the first link 52 and the other end connected to the third link 54. The other end of the first link 52 is connected to a second link 53, both ends of the second link 53 are respectively connected to the first link 52 and a third link 54, and the other end of the third link 54 is connected to the active link 51 to form a parallelogram link mechanism 5 in an interlocking manner. Preferably, the active lever 51, the first link 52, the second link 53 and the third link 54 are all hinged to each other through a revolute pair. The link mechanism 5 is a double-rocker link mechanism 5, the active rod 51 and the second link 53 are long edges, the active rod 51 and the second link 53 are rockers, and the first link 52 is correspondingly a connecting rod, so that efficient linkage of the four-link mechanism 5 is realized.

In the present embodiment, when the seat portion 2 is in the flat state, the link mechanism 5 has a substantially rectangular shape, and the first link 52 and the third link 54 are perpendicular to the active link 51 or the second link 53, respectively. When the seat portion 2 is in the standing state, the active rod 51, the first link 52, the second link 53, and the third link 54 are all disposed substantially vertically, and the first link 52 and the third link 54 are parallel to the active rod 51 or the second link 53, respectively. Each pin joint of the four-bar linkage 5 is respectively and at most configured at the end point position in one of the bar bodies, so that when the bar linkage 5 rotates to drive the seat part 2 to be in the vertical state, the length of each bar body is set one by one due to the pin joints, and the bar bodies between the bar linkages 5 are enough to be approximately vertically arranged in parallel, thereby ensuring that the first bar body is vertically arranged in two different states of the seat part 2, and further ensuring that the backrest part 3 connected and configured on one side of the first bar body is vertically arranged on the horizontal placing table 11 in two different states of the seat part 2.

Referring to fig. 5, the booster chair of the present application has two link mechanisms 5 respectively disposed at left and right sides of a horizontal placement platform 11. Correspondingly, two pushing mechanisms 6 are provided, and each link mechanism 5 is driven to operate independently. In this embodiment, the seat 2 is fixedly connected between the two active rods 51 to move along with the active rods 51. The seat part 2 is approximately rectangular for the user to sit down. Wherein, be connected with a horizontal pole between two first links 52, back 3 vertical configuration on the horizontal pole and with first link 52 parallel arrangement, via link mechanism 5 rotation, back 3 and first link 52 keep mutual parallel arrangement to make back 3 place platform 11 vertical setting relatively the level, supply the user to lean on the use.

Further, the transverse rod extends outwards along the first connecting rod 52, and an extending part of the transverse rod is provided with an armrest part for a user to grasp. The armrest part is provided with a button switch, which is convenient for users to control and use. The button switch is electrically connected with the control mechanism so as to control the stretching and pushing of the pushing mechanism 6. The push switch, the control mechanism and the pushing mechanism 6 are electrically connected, and the push switch further controls the electric push rod 61 of the pushing mechanism 6 to extend and retract, so as to realize the linkage control between the seat part 2 and the backrest part 3.

Preferably, the seat portion 2 defines a seat cavity 21 adapted to the buttocks of the user, and the seat cavity 21 is located at a position substantially in the middle of the end surface of the seat portion 2. And a container (not shown) for collecting excrement after the user uses the toilet is arranged in the seat supporting part 1 corresponding to the seat cavity 21 on the seat part 2 in a flat state, so that the power-assisted chair is used for assisting the user in using the toilet to sit down and assisting the user in standing after the user uses the toilet.

It should be noted that the driving lever 51 may be driven to rotate along the third link 54 by the pushing mechanism 6. For example, the pushing mechanism 6 is preferably a conventional electric push rod 61, and the electric push rod 61 is disposed at one side of the seat supporting portion 1, and an output shaft thereof is hinged to the driving lever 51 or the seat portion 2, so as to push the seat portion 2 to move between the standing state and the lying state, which will not be described in detail herein.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention.

Claims

1. The utility model provides a helping hand chair with underarm strutting arrangement which characterized in that includes:

a seat support part (1) having a horizontal placement platform (11);

a seat part (2) which is arranged on the horizontal placing platform (11) in a turnover way, wherein the seat part (2) has a vertical state which is vertically arranged on the horizontal placing platform (11) and a horizontal state which is horizontally arranged on the horizontal placing platform (11);

the backrest part (3) is arranged at one end, far away from the seat supporting part (1), of the seat part (2) in a turnover mode, and when the seat part (2) is in a vertical state or a horizontal state, the backrest parts (3) are vertically arranged relative to the horizontal placing platform (11) so as to be leaned by a user;

support parts (4) which are arranged on the left and right sides of the backrest part (3) and are used for supporting the armpits of a user; the supporting parts (4) comprise armpit supporting plates (41) used for supporting armpits and linkage mechanisms (42) used for controlling the armpit supporting plates (41) to be switched between a use state and an avoiding state; the armpit supporting plate (41) is assembled on the backrest part (3) through the linkage mechanism (42), the seat part (2) is in a vertical state, and the linkage mechanism (42) controls the armpit supporting plate (41) to relatively protrude in the horizontal direction and transversely arranged on the backrest part (3), so that the armpit supporting plate (41) is in a use state capable of supporting armpits of a user; the seat part (2) is in a flat state, and the armpit supporting plate (41) is controlled by the linkage mechanism (42) to be placed in parallel with the backrest part (3) along the vertical direction, so that the armpit supporting plate (41) is in an avoiding state of being relatively far away from a user.

2. The booster chair according to claim 1, wherein the linkage mechanism (42) comprises a frame (421) disposed on the backrest part (3), a support rod (422) and a long link (423) respectively hinge-disposed at both ends of the frame (421), and a short link (424) connecting the support rod (422) and the long link (423); the armpit supporting plate (41) is arranged at one end, far away from a hinge point, of the supporting rod (422), and the long connecting rod (423) is provided with an avoiding groove for accommodating the supporting rod (422) in a penetrating mode, so that the supporting rod (422) and the long connecting rod (423) are crossed along the rack (421) and mutually avoid to rotate; the short connecting rods (424) are hinged between the supporting rods (422) and the long connecting rods (423), the long connecting rods (423) are stress rods, the long connecting rods (423) are controlled by external force, so that the long connecting rods (423) drive the short connecting rods (424) to rotate to be accommodated in the avoidance grooves and to be perpendicular to the supporting rods (422), hinge points of the long connecting rods (423) and the rack (421), hinge points of the short connecting rods (424) and the supporting rods (422), and hinge points of the long connecting rods (423) and the short connecting rods (424) are located at the same straight line position, and at the moment, the supporting rods (422) are relatively arranged in the backrest portion (3) in a protruding mode in the horizontal direction, so that the armpit supporting plates (41) are in a use state.

3. The booster chair as claimed in claim 2, wherein the long link (423) is controlled by releasing external force, and the support rod (422) is under the self-gravity of the armpit supporting plate (41) arranged at the end of the support rod, so as to drive the short link (424) to rotate and further drive the long link (423) to rotate until the support rod (422) is standing in the substantially vertical direction, so as to enable the armpit supporting plate (41) to be in an avoiding state.

4. A booster chair according to claim 2, characterised in that the length of the escape slot is at least greater than the sum of the length of the stub link (424) and the width of the support bar (422).

5. A booster chair as claimed in claim 2, wherein a restraint bar (425) is provided at one end of the frame (421) in a vertical direction, the restraint bar (425) being adapted to relatively abut against and support the long link (423) in the use position.

6. A booster chair as claimed in claim 5, characterised in that the upper end surface of the armpit support plate (41) is shaped to conform to the curvature of the armpit of the user, the armpit support plate (41) being height adjustable relative to the support bar (422).

7. A booster chair as claimed in claim 2, characterized in that the seat support (1) comprises a front leg (121) and a rear leg (122), and at least four, for smooth placement of the seat support (1); the front end face where the front supporting leg (121) is located is provided with a pedal part (7) capable of moving up and down, the pedal part (7) is linked with the supporting part (4), and therefore the armpit supporting plate (41) of the supporting part (4) is correspondingly switched between a use state and an avoidance state through controlling the lifting of the pedal part (7).

8. A power-assisted chair according to claim 7, characterized in that a pull rope (9) is connected between the supporting part (4) and the pedal part (7), one end of the pull rope (9) is connected to the long connecting rod (423), the other end is connected to the pedal part (7) along the backrest part (3) and the seat part (2), and the pull rope (9) drives the long connecting rod (423) to rotate along the hinge point of the long connecting rod and the frame (421) through the lifting movement of the pedal part (7).

9. A power-assisted chair according to claim 8, characterized in that the footrest (7) comprises a pedal (71) and a rest (72) in the shape of an L; the backrest plate (72) is vertically arranged relatively, and a sliding assembly (8) for driving the pedal part (7) to move up and down along the vertical direction is arranged between the backrest plate (72) and the seat supporting part (1); the sliding assembly (8) comprises a sliding rail (81) vertically arranged on the seat supporting part (1) and a sliding seat (82) slidably arranged on the sliding rail (81), and the backup plate (72) is fixedly connected with the sliding seat (82); the lower end face of the pedal (71) is provided with a spring (10), the spring (10) is abutted to the pedal (71) to provide elastic force for the pedal part (7) to move upwards along the vertical direction, and therefore the pedal part (7) is driven to move upwards.

10. A booster chair according to claim 8, characterised in that the pull cord (9) is a wire rope which is constantly under tension to provide a pulling force for the linkage between the footrest part (7) and the support part (4) by switching between an upright position and a flat position via the seat part (2).