CN215959523U - Old-people assisting chair with automatic braking function - Google Patents

Abstract

The utility model provides an old-age assisting chair with an automatic braking function, which comprises a rotating mechanism, a sitting-standing switching mechanism, a back rubbing mechanism, a folding mechanism and a braking mechanism. The utility model provides a chair of helping old man has the function of rubbing one's back, sits and stands conversion function, rotation function, folding function and sits at the old man and automatic brake function behind the chair of helping old man, has solved effectively that the solitary old man sits the standing difficulty for a long time when being at home like the lavatory, stands easily to fall down and the back cleans inconvenient circumstances of life such as comparatively labouring on slippery ground when bathing, has reduced the safety risk when the old man lives alone, has improved its quality of life.

Description

Old-people assisting chair with automatic braking function

Technical Field

The utility model relates to the technical field of old people assisting equipment, in particular to an old people assisting chair with an automatic brake function.

Background

The aging of population becomes an important characteristic of the growth of Chinese population in the century, and the auxiliary product for the aged solves part of the requirements of the aged, sick and 'empty nest' aged. Standing and bathing are one of the most important factors affecting the independence of activities of daily life of the elderly. For example, when bathing, the floor of the bathroom is wet and slippery, which easily causes the old to fall down and the back of the old is cleaned with labored force; the old people have low bone density, poor cardiovascular regulation response and aged organs such as muscles, so that cerebral ischemia is easy to occur when the old people stand up after sitting in a toilet for a long time, muscle damage and even fracture can be caused by carelessness, and great difficulty and risk are brought to the independent life of the old people.

In order to solve the problems, various domestic and foreign bathing auxiliary equipment is continuously made available since the 21 st century, but the old-fashioned machines are not widely used in the market because of the high price.

The utility model patent No. (pub. No.: US 2017/0347845 Al) "variable height lift chair" is a type of chair that involves mechanization, the variable height mechanism power source using electric push rods, with selective variable height and mode of operation to lift the user, and optionally including a incorporated toilet bowl. The lifting chair is specially designed for disabled persons, old persons or other persons with significant physical limitations, but the lifting chair can only be placed on a closestool for use, is inconvenient to move and cannot be used together with family personnel.

The utility model patent number CN 107638253A's utility model patent "a mechanical system of multi-functional electronic bath chair" angle change people's back posture between bath chair back and the seat is adjusted to the accessible, the transform of position of sitting and the appearance of lying when realizing the bathing, nevertheless do not possess people and change the adjustment of the shank position appearance when standing the appearance by the position of sitting when like the lavatory, and the device brake adopts the mode that the foot stepped on, forget easily when the old man uses alone and step on the brake, there is certain potential safety hazard.

The patent of the utility model "a multi-functional nursing chair" of patent CN203107475U can follow the bend support frame on the chair and slide from top to bottom, realize changing the angle of seat support when the height of seat support is changed to the lift in-process, with the change position of sitting, thereby make things convenient for nursing staff's nursing old man to storing placing of bedpan when the lavatory and carrying out the omnidirectional washing to the old man when taking out and bathing, but the device is for the back to the adjustment of old man position appearance when ascending, it is different to lean forward the position appearance that the closestool stands up after like the lavatory with the solitary old man, and the clearance to the old man back needs nursing staff's help during the bathing. In addition, above-mentioned two kinds of devices are all bulky, can not fold, and inconvenient accomodating and removal are carried.

SUMMERY OF THE UTILITY MODEL

The utility model aims to design a foldable defecation assisting chair suitable for solitary old people, aiming at the conditions of inconvenient life such as difficult sitting and standing for a long time when the solitary old people sit in a toilet, easy falling when standing on a slippery ground during bathing, hard back scrubbing and the like, so that the safety risk of the old people during solitary living is reduced, and the life quality of the old people is improved.

In order to achieve the aim, the utility model provides an old-person assisting chair with an automatic braking function, which comprises a rotating mechanism, a sitting-standing switching mechanism, a back rubbing mechanism, a folding mechanism and a braking mechanism, wherein the sitting-standing switching mechanism is arranged on the back rubbing mechanism; wherein,

the rotating mechanism comprises a rotating plate and a bottom plate which are horizontally and vertically arranged in an opposite mode, coaxial first through holes are formed in the rotating plate and the bottom plate in a penetrating mode, and the rotating plate is axially and rotatably installed on the bottom plate around the first through holes;

the sitting and standing conversion mechanism comprises a turnover plate and a driving assembly for driving the turnover plate to move along a motion track of a human body from a sitting state to a standing state, the turnover plate is arranged above the rotating plate, a second through hole corresponding to the first through hole is formed in the middle of the turnover plate, and the driving assembly is installed on the rotating plate;

the back rubbing mechanism comprises a horizontal adjusting component, an up-down adjusting component arranged on the horizontal adjusting component and a back rubbing plate arranged on the up-down adjusting component; the horizontal adjusting assembly is arranged on the rotating plate and used for driving the vertical adjusting assembly to reciprocate in the horizontal direction; the up-down adjusting component is used for adjusting the distance between the back wiping plate and the turnover plate and the position extending into the upper part of the turnover plate;

the folding mechanism comprises two folding units which are oppositely arranged, the folding units are of Z-shaped folding structures and comprise connecting pipes and brake grooves which are horizontally and oppositely arranged up and down, and the connecting pipes are connected with the brake grooves through supporting pipes; the top end of the supporting tube is hinged with one end of the connecting tube through a hinge piece, the hinge piece is locked with the supporting tube through a first bayonet lock, and the other end of the connecting tube and the middle part of the supporting tube are connected with a first air pressure rod; the bottom end of the supporting tube is hinged with the middle part of the brake groove and is locked by a second clamping pin, the bottom of the supporting tube and one end of the brake groove are connected with a second air pressure rod, the second air pressure rod and the first air pressure rod are respectively arranged at two sides of the supporting tube, a longitudinal sliding groove is formed in the brake groove, the bottom end of the second air pressure rod is connected in the sliding groove in a sliding mode through a pin shaft, and the other end of the second air pressure rod is rotatably connected to the supporting tube; the connecting pipe is fixedly arranged at the bottom of the bottom plate;

the brake mechanism comprises a directional wheel, a steel plate spring and a universal wheel, the directional wheel is installed on one end of the steel plate spring, and the other end of the steel plate spring is installed in the brake groove; the universal wheel is installed at one end of the second pneumatic rod connected with the brake groove through a connecting piece.

Further, the rotating plate is rotatably mounted on the bottom plate through a bull eye bearing;

the bottom of the rotating plate is provided with a limiting ring which is coaxial with the first through hole and extends downwards, the bottom of the outer wall of the limiting ring is provided with a first bearing, and the outer ring of the first bearing rolls on the upper surface of the bottom plate;

a second bearing is arranged on the upper surface of the bottom plate, and the outer ring of the second bearing rolls on the outer wall of the limiting ring;

the rotating plate and the bottom plate are clamped and fixed through a turnover hinge.

Furthermore, the driving assembly comprises a third air pressure rod and an electric push rod which are respectively arranged at two sides of the turnover plate, and the third air pressure rod and the electric push rod are both connected with the turnover plate through a guide piece;

the guide piece comprises a curved tube handrail and guide rails inserted into the two ends of the curved tube handrail, the curved tube handrail is connected with the guide rails in a sliding mode through guide rail sleeves, the bottom end of each guide rail is fixed on the rotating plate, and the two ends of the curved tube handrail are fixed on the turnover plate respectively;

the bottoms of the third pneumatic rod and the electric push rod are rotatably arranged on the rotating plate, and the tops of the third pneumatic rod and the electric push rod are respectively rotatably connected with the corresponding curved tube handrails.

Further, the horizontal adjusting assembly comprises a ball screw and a screw motor for driving the ball screw to rotate, and two ends of the ball screw are both mounted on the rotating plate through a bearing seat;

the ball screw is provided with a moving platform through a ball screw pair in a sliding manner, an optical axis penetrates through the moving platform through a linear bearing in a sliding manner, the optical axis is parallel to the ball screw, and two ends of the optical axis are respectively and fixedly connected to the corresponding bearing seats;

the two ends of the optical axis are provided with limit switches, and the limit switches are in signal connection with the screw motor;

the up-down adjusting component is fixedly arranged on the mobile station.

Further, telescopic sleeves are sleeved on the ball screws between the mobile station and the bearing blocks on the two sides;

the outer cover of the screw motor is provided with a motor shell;

the lead screw motor is connected with the ball screw through a coupler;

the rotating plate is further provided with a battery box, and a battery and a controller for supplying power are arranged in the battery box.

Further, the up-down adjusting assembly comprises a mounting box, an adjusting motor and an adjusting arm;

the mounting box is square and comprises a mounting plate and rotating boxes rotatably connected to two ends of the mounting plate, the bottom of each rotating box is provided with an opening and is buckled on the mounting plate, the adjusting motor is mounted in the rotating box, and a first spring is connected between the rotating box and the mounting plate;

the adjusting arm comprises a swing arm, a connecting rod and an unfolding arm, the connecting rod comprises a first connecting rod and a second connecting rod which is rotatably connected with one end of the first connecting rod, and the first connecting rod and the second connecting rod are arranged in the same plane; the other end of the first connecting rod is rotatably connected to the outer wall of one side of the rotating box;

the swing arm is connected with the spreading arm through a first gear set, the first gear set comprises a first gear and a second gear which are meshed with each other, the first gear is fixedly installed at one end of the swing arm, the second gear is fixedly installed at one end of the spreading arm, and the first gear and the second gear are both rotatably installed on one side of the second connecting rod;

the swing arm is connected with the adjusting motor through a second gear set, the second gear set comprises a third gear and a fourth gear which are meshed with each other, the third gear is fixedly installed at the other end of the swing arm, and the third gear is rotatably installed on the outer side wall, connected with a first connecting rod, of the rotating box; the fourth gear is arranged on a rotating shaft of the adjusting motor;

the backboard is arranged at the other end of the exhibition arm in a manner of being capable of rotating left and right through the mounting piece.

Furthermore, a limiting rod is arranged at the open end of the bottom of the rotating box, the limiting rod is parallel to the axial direction of the adjusting motor, and two ends of the limiting rod are connected to the rotating box;

the mounting plate is inserted with a limiting pin matched with the limiting rod, and the limiting pin is matched with the limiting rod to limit the rotation of the rotating box.

Further, a gear cover used for covering the second gear set is connected to the rotating box;

and a gear shell used for covering the first gear set is arranged on the second connecting rod.

Furthermore, the first bayonet lock and the second bayonet lock are synchronously connected through a brake cable, the brake cable penetrates through the connecting pipe and the supporting pipe, one end of the brake cable is connected with a brake handle, and the brake handle is arranged at one end, far away from the supporting pipe, of the connecting pipe;

the other end of the brake cable is connected to the second clamping pin, a second spring is connected between the second clamping pin and the supporting tube, and the bottom end of the second spring is connected with the supporting tube through a fixing bolt;

the middle part of the brake cable is connected with the first clamping pin through a connecting wire, two ends of the connecting wire are fixedly connected with the middle part of the first clamping pin after respectively bypassing the two fixing bolts, the two fixing bolts are both arranged on the supporting tube, and the middle part of the connecting wire is fixedly connected with the brake cable through a connecting block.

The utility model has the beneficial effects that:

1. the utility model provides a chair of helping old people has the function of rubbing back, can use the function of rubbing back during the bathing, and horizontal adjustment subassembly drives to wipe the backplate and removes and rub the back, and the height of rubbing the backplate can be adjusted to upper and lower adjustment subassembly. In addition, the up-and-down adjusting assembly can adjust the position according to the radian of the back of a person, and the back rubbing plate can apply certain pressure to the back under the tension of the first spring. The angle of the back rubbing board can be adjusted according to the radian of the back of a person, so that the back rubbing board is ensured to be always attached to the back of the person, the back rubbing board can be contacted in a normal sitting posture, and the back rubbing board is not required to be met by adjusting the sitting posture.

2. The seat station conversion function is that a third pneumatic rod and an electric push rod are arranged on two sides of the turnover plate, and the third pneumatic rod can replace the electric push rod to provide thrust, so that the cost can be controlled, the weight is reduced, and the electricity is saved. The flexible upset board that realizes along the guide rail upset of control electric putter, the upset orbit of upset board accords with the motion orbit that the human body stood, and the supplementary old man stands up after like the lavatory, reduces old man's muscle damage and prevents the risk of the unable station-up.

3. Help old chair this application help old chair has rotation function, and the part can rotate more than the rotor plate, and the old man sits and can break upset hinge unblock rotation function off with the fingers and thumb on helping old chair, both can rotate like rotatory seat, and the article of taking the side of the hand conveniently. When the rotation function is not used, the turnover hinge can be turned upwards to be clamped with the rotating plate, and the rotation function of the old-assistant chair is locked.

4. The utility model provides a chair of helping old person can fold, folds the stay tube promptly, reduces the height of chair of helping old person to practice thrift occupation space, and portable. The first air pressure rod and the second air pressure rod on the supporting tube can provide buffering force for the folding of the old-person-assistant chair, provide thrust for the unfolding of the old-person-assistant chair, and are time-saving, labor-saving, convenient and fast.

5. The old-person-assisting chair has an automatic braking function, namely when an old person sits on the old-person-assisting chair, the second air pressure rod can contract under the gravity of the old person, and the steel plate spring can also bend until the brake groove is in contact with the ground, so that the stable and quick braking effect is achieved. For the pedal type brake, the risk that the old people forget to step on the brake to cause the chair to move can be avoided, and the operation is simpler.

Drawings

FIG. 1 is a first schematic view of a structural plate of an old-people assisting chair with an automatic braking function according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a second structural plate of an old-people assisting chair with an automatic braking function according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a rotation mechanism of an old-people assisting chair with an automatic braking function according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a sitting-standing switching mechanism of an old-people-assistant chair with an automatic braking function according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a horizontal adjustment assembly of a senior chair with an automatic braking function according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of an up-down adjustment assembly of a chair for old people with an automatic braking function according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a folding mechanism of an old-people chair with an automatic braking function according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a braking mechanism of an old-people chair with an automatic braking function according to an embodiment of the present invention;

wherein, the rotating mechanism 1, the sitting station switching mechanism 2, the back rubbing mechanism 3, the folding mechanism 4, the braking mechanism 5, the rotating plate 6, the bottom plate 7, the first through hole 8, the turnover plate 9, the second through hole 10, the back rubbing plate 11, the connecting pipe 12, the braking groove 13, the supporting pipe 14, the hinge 15, the first bayonet 16, the first air pressure rod 17, the second bayonet 18, the second air pressure rod 19, the orientation wheel 20, the spring steel plate 21, the universal wheel 22, the connecting piece 23, the bull eye bearing 24, the spacing ring 25, the first bearing 26, the second bearing 27, the third air pressure rod 28, the electric push rod 29, the curved pipe handrail 30, the guide rail 31, the guide rail sleeve 32, the ball screw 33, the screw motor 34, the bearing seat 35, the ball screw pair 36, the moving platform 37, the linear bearing 38, the optical axis 39, the spacing switch 40, the telescopic sleeve 41, the motor shell 42, the coupling 43, the battery box 44, the adjusting motor 45, the mounting plate 46, the bottom plate 7, the second through hole 10, the positioning plate, the positioning device, and the positioning device, and the positioning device, The device comprises a rotating box 47, a first spring 48, a swing arm 49, an unfolding arm 50, a first connecting rod 51, a second connecting rod 52, a first gear set 53, a second gear set 54, a mounting piece 55, a limiting rod 56, a limiting pin 57, a gear cover 58, a gear shell 59, a sliding groove 60, a brake cable 61, a brake handle 62, a second spring 63, a fixing bolt 64, a connecting wire 65, a connecting block 66 and a turnover hinge 67.

Detailed Description

The following describes in more detail embodiments of the present invention with reference to the schematic drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As shown in fig. 1 to 8, an old-age chair with an automatic braking function according to an embodiment of the present invention includes a rotating mechanism 1, a sitting-standing switching mechanism 2, a back-rubbing mechanism 3, a folding mechanism 4, and a braking mechanism 5. Wherein, rotary mechanism 1 includes level, relative rotor plate 6 and the bottom plate 7 that sets up from top to bottom, and coaxial first through-hole 8 has all been seted up in running through on rotor plate 6 and the bottom plate 7, and rotor plate 6 rotates around first through-hole 8 axial and installs on bottom plate 7. The sitting and standing conversion mechanism 2 comprises an overturning plate 9 and a driving assembly used for driving the overturning plate 9 to move along the motion track of a human body from a sitting state to a standing state, the overturning plate 9 is arranged above the rotating plate 6, a second through hole 10 corresponding to the first through hole 8 is formed in the middle of the overturning plate 9, and the driving assembly is installed on the rotating plate 6. The back rubbing mechanism 3 comprises a horizontal adjusting component, an up-down adjusting component arranged on the horizontal adjusting component and a back rubbing plate 11 arranged on the up-down adjusting component; the horizontal adjusting component is arranged on the rotating plate 6 and used for driving the vertical adjusting component to reciprocate in the horizontal direction; the up-down adjusting component is used for adjusting the distance between the back wiping plate 11 and the turnover plate 9 and the position extending into the upper part of the turnover plate 9. The folding mechanism 4 comprises two oppositely arranged folding units, each folding unit is of a Z-shaped folding structure and comprises a connecting pipe 12 and a brake groove 13 which are horizontally oppositely arranged up and down, and the connecting pipe 12 is connected with the brake groove 13 through a supporting pipe 14; the top end of the supporting tube 14 is hinged with one end of the connecting tube 12 through a hinge element 15, the hinge element 15 is locked with the supporting tube 14 through a first bayonet 16, and the other end of the connecting tube 12 and the middle part of the supporting tube 14 are connected with a first air pressure rod 17; the bottom end of the supporting tube 14 is hinged with the middle part of the brake groove 13 and is locked by a second bayonet 18, the bottom of the supporting tube 14 and one end of the brake groove 13 are connected with a second air pressure rod 19, the second air pressure rod 19 and the first air pressure rod 17 are respectively arranged at two sides of the supporting tube 14, and the connecting part of the second air pressure rod 19 and the brake groove 13 can move up and down in the brake groove 13; the connecting pipe 12 is fixedly arranged at the bottom of the bottom plate 7. The brake mechanism 5 comprises a directional wheel 20, a steel plate spring 21 and a universal wheel 22, wherein the directional wheel 20 is arranged at one end of the steel plate spring 21, and the other end of the steel plate spring 21 is arranged in the brake groove 13; the universal wheel 22 is mounted on one end of the second pneumatic rod 19 connected with the brake groove 13 through a connecting piece 23.

When the old man sits on the chair, the weight of the old man can enable the second pneumatic rod 19 to contract, and meanwhile, the steel plate spring 21 is stressed and bent until the brake groove 13 is in contact with the ground to form a brake effect, and the chair cannot move. After the old person leaves the chair, the reverse thrust of the second pneumatic rod 19 and the reaction force of the steel plate spring 21 lift the chair to lift the brake groove 13 off the ground, and the chair can be moved at the moment.

Specifically, the rotating plate 6 is rotatably mounted on the bottom plate 7 through a bull's eye bearing 24, and the bull's eye bearing 24 is mounted on the bottom plate 7. The bottom of the rotating plate 6 is provided with a limiting ring 25 which is coaxial with the first through hole 8 and extends downwards, the bottom of the outer wall of the limiting ring 25 is provided with a first bearing 26 through a bearing screw, and the outer ring of the first bearing 26 rolls on the upper surface of the bottom plate 7. A second bearing 27 is arranged on the upper surface of the bottom plate 7 through a bearing screw, and the outer ring of the second bearing 27 rolls on the outer wall of the limiting ring 25. The first bearing 26 and the second bearing 27 keep the rotating plate 6 axially rotated around the first through hole 8. The rotating plate 6 and the bottom plate 7 are clamped and fixed through a turnover hinge 67, and the turnover hinge 67 is installed on the bottom plate 7. The rotating plate 6 can be clamped and fixed by turning the turning hinge 67 upwards, and the rotating plate 6 can be unlocked by breaking the turning hinge 67 away from the rotating plate 6 if the rotating plate 6 needs to rotate.

Specifically, the driving assembly comprises a third pneumatic rod 28 and an electric push rod 29 which are respectively arranged at two sides of the turnover plate 9, and the third pneumatic rod 28 and the electric push rod 29 are both connected with the turnover plate 9 through a guide piece. The guide piece comprises a curved pipe handrail 30 and guide rails 31 inserted into the two ends of the curved pipe handrail 30, the curved pipe handrail 30 is connected with the guide rails 31 in a sliding mode through guide rail sleeves 32, the bottom end of each guide rail 31 is fixed on the rotating plate 6, and the two ends of the curved pipe handrail 30 are fixed on the turnover plate 9 through flange plates respectively. The flange plate is fixed with the curved pipe handrail 30 through a primary and secondary bolt which is arranged in the guide rail sleeve 32 in a penetrating way and is movably arranged in a guide hole on the guide rail 31 in a penetrating way.

The bottoms of the third pneumatic rod 28 and the electric push rod 29 are rotatably mounted on the rotating plate 6, and the tops of the third pneumatic rod and the electric push rod are rotatably connected with corresponding curved tube handrails 30 through primary and secondary bolts. The electric push rod 29 is controlled to stretch and drive the curved pipe handrail 30 to drive the turnover plate 9 to turn over for a certain angle along the track of the guide hole of the guide rail 31, so that the function of assisting the old to stand up after going to the toilet is realized. The third pneumatic rod 28 can replace the electric push rod 29 to provide thrust, so that the cost can be controlled, the weight can be reduced, and the electricity can be saved.

Specifically, the horizontal adjustment assembly includes a ball screw 33 and a screw motor 34 for driving the ball screw 33 to rotate, and both ends of the ball screw 33 are mounted on the rotating plate 6 through a bearing seat 35. The ball screw 33 is slidably provided with a movable table 37 through a ball screw pair 36, an optical axis 39 is slidably arranged in the movable table 37 through a linear bearing 38, the optical axis 39 is parallel to the ball screw 33, and two ends of the optical axis 39 are fixedly connected to corresponding bearing seats 35 respectively. Both ends of the optical axis 39 are provided with limit switches 40, the limit switches 40 are in signal connection with the lead screw motor 34, and the moving direction of the lead screw motor 34 can be changed when the moving platform 37 moves and touches the limit switches 40, so that the left and right reciprocating movement of the moving platform 37 is realized. The up-down adjustment assembly is fixedly mounted on the moving table 37.

Further, the ball screws 33 between the movable table 37 and the bearing blocks 35 on both sides are respectively sleeved with a telescopic sleeve 41. The lead screw motor 34 is housed with a motor housing 42. The lead screw motor 34 is connected to the ball screw 33 via a coupling 43. The rotating plate 6 is further provided with a battery box 44, a battery for supplying power and a controller are arranged in the battery box 44, and the controller is in signal connection with the electric push rod 29 and the lead screw motor 34 and is used for controlling the electric push rod 29 to extend and retract and controlling the lead screw motor 34 to rotate forwards and backwards.

Specifically, the vertical adjustment assembly includes a mounting box, an adjustment motor 45, and an adjustment arm. The mounting box is squarely, including mounting panel 46 and through the rotatory box 47 of bolted connection at mounting panel 46 both ends, the uncovered setting in rotatory box 47 bottom is detained on mounting panel 46, and adjustment motor 45 installs in rotatory box 47, is connected with first spring 48 between rotatory box 47 and the mounting panel 46. Under the tension of the first spring 48, the friction plate 11 will give a certain pressure to the back.

The adjusting arm comprises a swing arm 49, a connecting rod and an unfolding arm 50, the connecting rod comprises a first connecting rod 51 and a second connecting rod 52 which is rotatably connected with one end of the first connecting rod 51, and the first connecting rod 51 and the second connecting rod 52 are arranged in the same plane; the other end of the first connecting rod 51 is rotatably connected to one side outer wall of the rotating case 47.

The swing arm 49 is connected with the spreading arm 50 through a first gear set 53, the first gear set 53 comprises a first gear and a second gear which are meshed with each other, the first gear is fixedly installed at one end of the swing arm 49, the second gear is fixedly installed at one end of the spreading arm 50, and the first gear and the second gear are both rotatably installed at one side of the second connecting rod 52.

The swing arm 49 is connected with the adjusting motor 45 through a second gear set 54, the second gear set 54 comprises a third gear and a fourth gear which are meshed with each other, the third gear is fixedly arranged at the other end of the swing arm 49, and the third gear is rotatably arranged on the outer side wall of the rotating box 47, which is connected with a first connecting rod 51; the fourth gear is mounted on the rotation shaft of the adjustment motor 45.

The backboard 11 is rotatably mounted to the other end of the arm 50 by a mounting member 55.

The adjustment motor 45 drives the third gear to rotate through the fourth gear, so that the included angle and the height of the swing arm 49 and the extending arm 50 are adjusted, the position of the back board 11 is adjusted, the back board 11 can be adjusted in angle according to the radian of the back of a person, the back board 11 is guaranteed to be attached to the back all the time, the back board 11 can be contacted in a normal sitting posture, and the back board 11 is free from being rubbed in a meeting way without adjusting the sitting posture.

Further, a limiting rod 56 is arranged at the open end of the bottom of the rotating box 47, the limiting rod 56 is parallel to the adjusting motor 45 and is axially arranged, and two ends of the limiting rod are connected to the rotating box 47; a limit pin 57 engaged with the limit rod 56 is inserted in the mounting plate 46, and the limit pin 57 is engaged with the limit rod 56 to limit the rotation of the rotating box 47. The rotating box 47 can be rotated outwards by 90 degrees by pulling out the limit pin 57, and then the limit pin 57 is inserted and fixed, so that the collision between the turnover plate 9 and the back wiping plate 11 can be avoided when the seat station conversion function is used.

Further, the rotary case 47 is connected with a gear cover 58 for covering the second gear set 54; the second connecting rod 52 is provided with a gear housing 59 for housing the first gear set 53.

Furthermore, a longitudinal sliding groove 60 is formed in the brake groove 13, the bottom end of the second pneumatic rod 19 is slidably connected in the sliding groove 60 through a pin shaft, and the other end of the second pneumatic rod 19 is rotatably connected to the support tube 14.

Specifically, the first clamping pin 16 and the second clamping pin 18 are synchronously connected through a brake cable 61, the brake cable 61 is arranged in the connecting pipe 12 and the supporting pipe 14 in a penetrating manner, one end of the brake cable 61 is connected with a brake handle 62, and the brake handle 62 is arranged at one end of the connecting pipe 12 far away from the supporting pipe 14. The other end of the brake cable 61 is connected to the second pin 18, a second spring 63 is connected between the second pin 18 and the support tube 14, and the bottom end of the second spring 63 is connected to the support tube 14 through a fixing bolt 64.

The middle part of the brake cable 61 is connected with the first bayonet 16 through a connecting wire 65, two ends of the connecting wire 65 are fixedly connected with the middle part of the first bayonet 16 after respectively bypassing the two fixing bolts 64, the two fixing bolts 64 are both arranged on the supporting tube 14, and the middle part of the connecting wire 65 is fixedly connected with the brake cable 61 through a connecting block 66.

The first locking pin 16 and the second locking pin 18 can move along the opened movable hole in the support pipe 14, and the moving directions of the first locking pin 16 and the second locking pin 18 are opposite. In the rest state, the second spring 63 has a certain tension, pulling the second locking pin 18 to lock the support tube 14 and the brake groove 13, while the first locking pin 16 is under a tension opposite to the tension of the second spring 63 to lock the hinge member 15 and the support tube 14 under the action of the brake cable 61.

When the folding bicycle is folded, the rotating plate 6 needs to be slightly lifted to unlock the second bayonet lock 18, then the brake handle 62 is pulled, the brake cable 61 drives the first bayonet lock 16 and the second bayonet lock 18 to reversely move, wherein the second bayonet lock 18 moves upwards in an inclined mode to be separated from the brake groove 13, after the other first bayonet lock 16 moves downwards in an inclined mode to be separated from the hinge piece 15, the rotating plate 6 is slightly pressed downwards with force, at the moment, the first air pressure rod 17 and the second air pressure rod 19 can contract, and when the supporting tube 14 rotates clockwise to a horizontal position around a hinge point with the brake groove 13, the folding bicycle can be folded.

When the wheelchair is unfolded, the rotating plate 6 is lifted by a little force, the wheelchair is automatically unfolded under the pushing force of the first air pressure rod 17 and the second air pressure rod 19, the supporting tube 14 and the brake groove 13 are clamped and interlocked by the second clamping pin 18 under the pulling force of the second spring 63, and the supporting tube 14 and the hinge part 15 are clamped and interlocked by the first clamping pin 16.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (9)

1. An old-age chair with an automatic braking function is characterized by comprising a rotating mechanism (1), a sitting-standing switching mechanism (2), a back rubbing mechanism (3), a folding mechanism (4) and a braking mechanism (5); wherein,

the rotating mechanism (1) comprises a rotating plate (6) and a bottom plate (7) which are horizontally and oppositely arranged up and down, coaxial first through holes (8) are formed in the rotating plate (6) and the bottom plate (7) in a penetrating mode, and the rotating plate (6) is axially and rotatably installed on the bottom plate (7) around the first through holes (8);

the sitting and standing conversion mechanism (2) comprises an overturning plate (9) and a driving assembly for driving the overturning plate (9) to move along a motion track of a human body from a sitting state to a standing state, the overturning plate (9) is arranged above the rotating plate (6), a second through hole (10) corresponding to the first through hole (8) is formed in the middle of the overturning plate (9), and the driving assembly is installed on the rotating plate (6);

the back rubbing mechanism (3) comprises a horizontal adjusting component, an up-down adjusting component arranged on the horizontal adjusting component and a back rubbing plate (11) arranged on the up-down adjusting component; the horizontal adjusting assembly is arranged on the rotating plate (6) and is used for driving the vertical adjusting assembly to reciprocate in the horizontal direction; the up-down adjusting component is used for adjusting the distance between the backboard (11) and the turnover plate (9) and the position extending into the upper part of the turnover plate (9);

the folding mechanism (4) comprises two oppositely arranged folding units, the folding units are of Z-shaped folding structures and comprise connecting pipes (12) and brake grooves (13) which are horizontally oppositely arranged up and down, and the connecting pipes (12) and the brake grooves (13) are connected through supporting pipes (14); the top end of the supporting tube (14) is hinged with one end of the connecting tube (12) through a hinge piece (15), the hinge piece (15) is locked with the supporting tube (14) through a first bayonet (16), and the other end of the connecting tube (12) is connected with the middle part of the supporting tube (14) through a first air pressure rod (17); the bottom end of the supporting tube (14) is hinged with the middle of the brake groove (13) and is locked by a second clamping pin (18), the bottom of the supporting tube (14) and one end of the brake groove (13) are connected with a second air pressure rod (19), the second air pressure rod (19) and the first air pressure rod (17) are respectively arranged on two sides of the supporting tube (14), the brake groove (13) is provided with a longitudinal sliding groove (60), the bottom end of the second air pressure rod (19) is connected in the sliding groove (60) in a sliding mode through a pin shaft, and the other end of the second air pressure rod (19) is connected to the supporting tube (14) in a rotating mode; the connecting pipe (12) is fixedly arranged at the bottom of the bottom plate (7);

the brake mechanism (5) comprises a directional wheel (20), a steel plate spring (21) and a universal wheel (22), the directional wheel (20) is installed on one end of the steel plate spring (21), and the other end of the steel plate spring (21) is installed in the brake groove (13); the universal wheel (22) is installed on one end of the second air pressure rod (19) connected with the brake groove (13) through a connecting piece (23).

2. The chair with the automatic brake function as claimed in claim 1, wherein the rotating plate (6) is rotatably mounted on the base plate (7) by means of a bull's eye bearing (24);

a limiting ring (25) which is coaxial with the first through hole (8) and extends downwards is arranged at the bottom of the rotating plate (6), a first bearing (26) is arranged at the bottom of the outer wall of the limiting ring (25), and the outer ring of the first bearing (26) rolls on the upper surface of the bottom plate (7);

a second bearing (27) is arranged on the upper surface of the bottom plate (7), and the outer ring of the second bearing (27) rolls on the outer wall of the limiting ring (25);

the rotating plate (6) and the bottom plate are clamped and fixed through a turnover hinge (67).

3. The old-fashioned chair with automatic brake function as claimed in claim 1, wherein said driving assembly comprises a third pneumatic rod (28) and an electric push rod (29) respectively arranged at both sides of said turnover plate (9), said third pneumatic rod (28) and electric push rod (29) being connected with said turnover plate (9) through a guide member;

the guide piece comprises a curved pipe handrail (30) and guide rails (31) inserted into the two ends of the curved pipe handrail (30), the curved pipe handrail (30) is connected with the guide rails (31) in a sliding mode through guide rail sleeves (32), the bottom end of each guide rail (31) is fixed on the rotating plate (6), and the two ends of each curved pipe handrail (30) are respectively fixed on the turnover plate (9);

the bottoms of the third pneumatic rod (28) and the electric push rod (29) are rotatably arranged on the rotating plate (6), and the tops of the third pneumatic rod and the electric push rod are respectively rotatably connected with the corresponding curved tube handrails (30).

4. The chair as claimed in claim 1, wherein the horizontal adjustment assembly comprises a ball screw (33) and a screw motor (34) for driving the ball screw (33) to rotate, both ends of the ball screw (33) are mounted on the rotating plate (6) through a bearing seat (35);

a moving table (37) is slidably mounted on the ball screw (33) through a ball screw pair (36), an optical axis (39) penetrates through the moving table (37) in a sliding mode through a linear bearing (38), the optical axis (39) is parallel to the ball screw (33), and two ends of the optical axis are fixedly connected to the corresponding bearing seats (35) respectively;

both ends of the optical axis (39) are provided with limit switches (40), and the limit switches (40) are in signal connection with the screw motor (34);

the up-down adjusting component is fixedly arranged on the mobile station (37).

5. The chair as claimed in claim 4, wherein a telescopic sleeve (41) is sleeved on the ball screw (33) between the moving table (37) and the bearing seats (35) at both sides;

a motor shell (42) is arranged outside the lead screw motor (34);

the lead screw motor (34) is connected with the ball screw (33) through a coupler (43);

the rotating plate (6) is further provided with a battery box (44), and a battery and a controller for supplying power are arranged in the battery box (44).

6. The chair for old people with automatic brake function as claimed in claim 4, wherein the up-down adjusting assembly comprises a mounting box, an adjusting motor (45) and an adjusting arm;

the mounting box is square and comprises a mounting plate (46) and rotating boxes (47) which are rotatably connected to two ends of the mounting plate (46), the bottoms of the rotating boxes (47) are open and buckled on the mounting plate (46), the adjusting motors (45) are mounted in the rotating boxes (47), and first springs (48) are connected between the rotating boxes (47) and the mounting plate (46);

the adjusting arm comprises a swing arm (49), a connecting rod and an unfolding arm (50), the connecting rod comprises a first connecting rod (51) and a second connecting rod (52) rotatably connected with one end of the first connecting rod (51), and the first connecting rod (51) and the second connecting rod (52) are arranged in the same plane; the other end of the first connecting rod (51) is rotatably connected to the outer wall of one side of the rotating box (47);

the swing arm (49) is connected with the spreading arm (50) through a first gear set (53), the first gear set (53) comprises a first gear and a second gear which are meshed with each other, the first gear is fixedly arranged at one end of the swing arm (49), the second gear is fixedly arranged at one end of the spreading arm (50), and the first gear and the second gear are both rotatably arranged at one side of the second connecting rod (52);

the swing arm (49) is connected with the adjusting motor (45) through a second gear set (54), the second gear set (54) comprises a third gear and a fourth gear which are meshed with each other, the third gear is fixedly installed at the other end of the swing arm (49), and the third gear is rotatably installed on the outer side wall, connected with a first connecting rod (51), of the rotating box (47); the fourth gear is arranged on a rotating shaft of the adjusting motor (45);

the backboard (11) is arranged at the other end of the exhibition arm (50) in a manner of being capable of rotating left and right through a mounting piece (55).

7. The chair for the aged having the automatic braking function as claimed in claim 6, wherein a limit rod (56) is provided on an open end of the bottom of the rotating box (47), the limit rod (56) is arranged in parallel with the axial direction of the adjusting motor (45), and both ends are connected to the rotating box (47);

insert on mounting panel (46) be equipped with gag lever post (56) matched with spacing pin (57), spacing pin (57) with gag lever post (56) cooperation is in order to restrict the rotation of rotatory box (47).

8. The chair as claimed in claim 6, wherein a gear cover (58) for covering the second gear set (54) is attached to the rotary case (47);

the second connecting rod (52) is provided with a gear shell (59) used for covering the first gear set (53).

9. The chair with the automatic brake function as claimed in claim 1, wherein the first clamping pin (16) and the second clamping pin (18) are synchronously connected through a brake cable (61), the brake cable (61) is arranged in the connecting pipe (12) and the supporting pipe (14) in a penetrating way, one end of the brake cable (61) is connected with a brake handle (62), and the brake handle (62) is arranged at one end of the connecting pipe (12) far away from the supporting pipe (14);

the other end of the brake cable (61) is connected to the second clamping pin (18), a second spring (63) is connected between the second clamping pin (18) and the support tube (14), and the bottom end of the second spring (63) is connected with the support tube (14) through a fixing bolt (64);

the middle part of brake cable (61) pass through connecting wire (65) with first bayonet lock (16) are connected, the both ends of connecting wire (65) respectively bypass behind two gim peg (64) with first bayonet lock (16) middle part fixed connection, two gim peg (64) are all installed on stay tube (14), the middle part of connecting wire (65) pass through connecting block (66) with brake cable (61) fixed connection.

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