CN110448086A - The change born of the same parents' chair for helping old solitary people to stand up from sitting posture - Google Patents

Abstract

The invention discloses a metamorphic chair for helping the elderly living alone to stand up from a sitting position, which belongs to the technical field of mechanisms. The rear side of the frame is connected with the rear outrigger and the backrest assembly, and the front outrigger assembly is connected under the frame; the chair seat board is arranged above the frame; the symmetrically arranged left link lifting mechanism, right link lifting mechanism, Tension spring assembly; the two sides of the frame are connected with a railing assembly; the left railing assembly is connected with an armrest assembly; a self-locking mechanism is connected between the seat board of the chair and the frame; An unlocking mechanism that unlocks the lock mechanism. This metamorphic chair uses part of the energy stored when the old man sits down when standing up, and lifts the buttocks to help the old man stand up from a sitting position; if necessary, you can also use the set left and right armrests to help you stand firmly and then leave; if you change A pair of bearings are installed on the lower end of the back legs of the chair, which can be pulled by one hand or both hands to change positions.

Description

The metamorphosis chair that helps the elderly living alone stand up from a sitting position

technical field

The invention relates to the technical field of mechanisms, in particular to a metamorphic chair for helping the elderly living alone to stand up from a sitting position.

Background technique

Mechanical devices that help the elderly live independently provide assistance for the elderly at different levels of aging to live alone, for example, machinery that assists the elderly to sit up from the bed and get on and off the bed alone, machinery that assists the elderly to walk to prevent falls, auxiliary A machine that stands up after a fall, a machine that assists the elderly living in duplex floors to go up and down stairs, and so on.

Relatively old people are somewhat inconvenient to move around. Many old people live alone at home. Most old people watch TV for a long time to understand the outside world. Old people sit on the sofa and watch TV for a long time, and often encounter situations where it is difficult to get up. His strength is not as good as before, and he still occasionally suffers from low back pain and numbness in his legs. At this time, the old man has no choice but to change his posture, calm down, and wait for the right time to stand up.

Contents of the invention

In order to solve the problem that it is difficult for an elderly person living alone to stand up smoothly after sitting on a sofa or an ordinary chair for a long time, the invention provides a metamorphic chair that can help an elderly person living alone to stand up from a sitting position.

The present invention is realized through the following technical proposals: a metamorphosis chair for helping the elderly living alone to stand up from a sitting position, comprising a frame, a rear outrigger and a backrest assembly connected to the rear of the frame, and a front outrigger assembly connected under the frame;

A chair seat board is arranged above the frame;

A symmetrically arranged left link lifting mechanism and a right link lifting mechanism are connected under the seat board of the chair;

The left link lifting mechanism and the right link lifting mechanism are connected with a tension spring assembly that gives the left link lifting mechanism and the right link lifting mechanism the lifting power;

The two sides of the frame are connected with buttress components, and the buttress components include a left buttress component and a right buttress component;

The left handrail assembly is connected to the left railing beam assembly, and the right handrail assembly is connected to the right railing beam assembly;

A self-locking mechanism is connected between the seat board of the chair and the frame, and an unlocking mechanism for controlling the unlocking of the self-locking mechanism is installed on the cross support beam assembly.

It further includes: the rear outrigger and backrest assembly includes symmetrically arranged left leg backs and right leg backs, and top beams, lower beams, rear upper bearings, Rear lower bearing; the left inner plate, middle inner plate and right inner plate are connected between the top beam and the lower beam; a trapezoidal groove is opened on the rear side of the lower end of the left leg back, and the left lower bearing is installed in the trapezoidal groove of the left leg back There is a trapezoidal groove on the rear side of the lower end of the right leg back, and a right lower bearing is installed in the trapezoidal groove on the right leg back; the middle part of the left leg back and the right leg back are fixedly connected to the frame;

The front outrigger assembly includes symmetrically arranged left front legs and right front legs, with front upper bearings and front lower bearings sequentially connected from top to bottom between the left front legs and right front legs; the upper ends of the left front legs and right front legs are fixedly connected to the frame ;

A left upper bearing and a left lower bearing are sequentially connected between the left leg back and the left front leg from top to bottom;

A right upper bearing and a right lower bearing are sequentially connected between the back of the right leg and the right front leg from top to bottom.

Described left connecting rod elevating mechanism comprises left lower support beam, left lower support beam rear part is hinged with left lower first connecting rod, left lower second connecting rod, left lower first connecting rod, left lower second connecting rod are arranged in parallel; left lower supporting beam front part Hinged with the lower left third link;

The upper ends of the lower left first connecting rod and the lower left second connecting rod are hinged with a left front support shaft, and the upper ends of the left lower third connecting rod are hinged with a left rear sleeve; the rear end of the left front support shaft is sleeved in the left rear sleeve, and the left front support The shaft, the left rear sleeve are parallel to the left lower support beam;

The upper left first connecting rod and the second upper left connecting rod are hinged on the left rear sleeve, the first upper left connecting rod and the second upper left connecting rod are arranged in parallel; the third upper left connecting rod is hinged on the left front support shaft; The upper ends of the upper left first connecting rod, the second upper left connecting rod, and the third upper left connecting rod are hinged with a left support assembly; the left support assembly is parallel to the left lower support beam;

The right connecting rod lifting mechanism includes a right lower support beam, a right front support shaft, and a right rear sleeve;

The front and rear ends of the right lower support beam and the left lower support beam are respectively fixedly connected with a front support beam and a rear support beam; the lower part.

The tension spring assembly includes symmetrically arranged rear second fulcrums and front second fulcrums; the two ends of the rear second fulcrum are respectively hinged on the left rear sleeve and the right rear sleeve, The ends are respectively hinged on the left front fulcrum and the right front fulcrum; a symmetrically arranged left spring and a right spring are connected between the rear second fulcrum and the front second fulcrum.

The self-locking mechanism is installed on the left railing beam assembly;

The self-locking mechanism includes an intermediate support fixedly connected to the middle position under the seat of the chair; a linkage shaft is fixedly connected to the intermediate support; a linkage plate is mounted on the end of the linkage shaft, and a linkage spring is set on the linkage shaft; The upper end of the linkage spring is fixedly connected to the middle support, and the lower end of the linkage spring is fixedly connected to the linkage plate;

There are symmetrical front grooves and rear grooves on the linkage plate, a front linkage pin is slidably installed in the front groove of the linkage plate, and a rear linkage pin is slidably installed in the rear groove of the linkage plate; the front linkage pin is connected with a left right-angle head, and the rear linkage pin is The linkage pin is connected with a right right-angle head; the other end of the left right-angle head is connected with a left cross-lock rod, and the other end of the right right-angle head is connected with a right cross-lock rod;

The left cross-locking rod and the right cross-locking rod are arranged symmetrically;

The two ends of the left horizontal lock rod are slidingly fitted with a left outer support and a left inner support, and the left outer support and the left inner support are fixed under the chair seat; the outer end of the left horizontal lock rod is fixedly connected with a left lock head ; The outer surface of the left lock head is a slope, and the slope of the left lock head is opposite to the left side of the frame up and down.

The left buttress assembly is symmetrical to the right buttress assembly;

The left buttress assembly includes a left upright beam, the lower end of the left upright beam is fixedly connected to the left side of the frame, the upper end of the left upright beam is fixedly connected with a left buttress, and the rear end of the left buttress is fixedly connected with the rear outrigger and the backrest assembly.

The unlocking mechanism includes an unlocking installation hole that runs through the left vertical beam, the left railing beam, and the frame up and down; a push rod is installed in the unlocking installation hole, the upper end of the push rod is fixedly connected with an unlocking button, and the lower end of the push rod is fixedly connected with a slanting block , the inclined block is slidably installed in the lower part of the unlocking installation hole;

The left base opposite to the unlocking installation hole is fixedly connected to the lower side of the frame; a horizontal chute is opened in the left base, the upper opening of the left base chute is opposite to the lower end of the unlocking installation hole, and the lower end of the inclined block is located at In the left base chute, the bottom of the left base chute is provided with a long slot for inserting the tip of the lower end of the slanting block; an unlocking pole is slidably installed in the left base chute, and the inner end of the unlocking pole is matched with the slanting block. The outer end of the unlocking rod is relatively matched with the left lock head in the self-locking mechanism.

The left armrest assembly is symmetrical to the right armrest assembly;

The left handrail assembly includes a left handrail hinged on the front side of the left railing, the two ends of the left handrail are bent downwards, and the end of the left handrail is provided with a socket;

The lower left support beam is fixedly connected with the lower left support; the lower left support has a chute through the front and back, and the lower left inner slide frame is slidably installed in the chute of the lower left support. A plug matched with the socket at the end of the armrest; the lower left first plate is fixedly connected to the rear side of the lower left support, and the second lower left plate is fixed in the lower left inner slide frame; the lower left horizontal support shaft is fixedly connected to the first lower left plate, The front end of the lower left horizontal support shaft slides through the second lower left plate; the lower left horizontal support shaft is fitted with a lower left spring, and the two ends of the lower left spring are respectively against the first lower left plate and the second lower left plate;

A left lower vertical support shaft is rotatably installed in the left lower support; the lower end of the left lower vertical support shaft protrudes from the left lower support, and the lower left end of the left lower vertical support shaft is fixedly connected with a left lower hand wheel; the upper end of the left lower vertical support shaft extends into the lower left inner In the sliding frame, the lower left inner sliding frame is provided with an elongated groove for the lower left vertical support shaft to pass through, and the upper end of the lower left vertical support shaft is fixedly connected with the lower left bearing; the lower left bearing is against the front side of the second lower left plate.

The unlocking mechanism is installed on the right side rail assembly.

The beneficial effects of the present invention are: when standing up, use part of the energy stored by the old man when he sits down, and lift the buttocks to help the old man stand up from the sitting position; if necessary, the left and right handrails can also be used to help the old man stand up and then leave; If the position is changed, a pair of bearings are installed at the lower end of the rear legs of the chair, which can be pulled by one hand or both hands to change positions.

Description of drawings

Fig. 1 is the left side view of the chair seat board being in a high position when no one is sitting;

Fig. 2 is the left view of the seat board of the chair in a low position when someone is sitting;

Fig. 3 is the right view of the seat board of the chair in a low position when someone is sitting;

Figure 4 is the A-A sectional view of the bottom of the chair;

Figure 5 is a top view of the left rear sleeve part;

Fig. 6 is the front view of the first lower left connecting rod;

Figure 7 is a top view of the first lower left connecting rod;

Figure 8 is a front view of the rear outrigger and backrest assembly;

Figure 9 is a left side view of the rear outrigger and backrest assembly;

Figure 10 is a front view of the second lower left connecting rod;

Figure 11 is a top view of the second lower left connecting rod;

Fig. 12 is a top view of the tension spring assembly when the chair seat is in a high position;

Fig. 13 is a top view of the tension spring assembly when the chair seat is in a low position;

Figure 14 is a front view of the front outrigger assembly;

Figure 15 is a top view of the frame;

Fig. 16 is a partial front view of the self-locking mechanism during the lifting process of the seat board of the chair;

Fig. 17 is a partial top view of the self-locking mechanism during the lifting process of the seat board of the chair;

Fig. 18 is the front view of the chair seat board, the left support assembly, and the right support assembly;

Fig. 19 is a front view of the first state of the unlocking mechanism on the left side during the lifting process of the seat board assembly of the chair;

Figure 20 is a front view of the third lower left connecting rod;

Figure 21 is a top view of the third lower left connecting rod;

Fig. 22 is a front view of the second state of the unlocking mechanism on the left side during the lifting process of the seat board assembly of the chair;

Figure 23 is a front view of the upper left first connecting rod;

Figure 24 is a top view of the upper left first connecting rod;

Fig. 25 is a front view of the third state of the unlocking mechanism on the left side during the lifting process of the seat board assembly of the chair;

Figure 26 is a front view of the second upper left connecting rod;

Figure 27 is a top view of the second upper left connecting rod;

Fig. 28 is a front view of the fourth state of the unlocking mechanism on the left side during the lifting process of the seat board assembly of the chair;

Fig. 29 is a front view of the upper left third connecting rod;

Figure 30 is a top view of the third connecting rod on the left;

Figure 31 is a front view of the left handrail, the left handrail and the unlocking mechanism on the left side;

Fig. 32 is a top view of the left handrail, the left handrail and the unlocking mechanism on the left side;

Figure 33 is a left side view of the left lower support;

Figure 34 is a top view of the left lower support;

Figure 35 is a top view of the chair seat plate relative to the left vertical beam and the right vertical beam;

Figure 36 is a stepped sectional view of the left base;

Figure 37 is a top view of the left base;

Figure 38 is a left side view of the left base;

Fig. 39 is a front view of the right handrail, the right handrail and the unlocking mechanism on the right side;

Figure 40 is a right side view of the lower right support;

Figure 41 is a top view of the lower right support;

Figure 42 is a front view of the left lower handwheel;

Figure 43 is a left view of the lower left handwheel;

Figure 44 is a top view of the left lower handwheel;

Figure 45 is a front view of the lower left inner slide frame;

Figure 46 is a top view of the lower left inner sliding frame;

Figure 47 is a top view of the chair seat board and the left support assembly, the right support assembly, and the middle support;

Fig. 48 is the left side view of the chair seat board and the left support assembly, the right support assembly, and the middle support;

Figure 49 is a top view of the unlocking mechanism;

Figure 50 is a top view of the left front pivot;

Figure 51 is a left side view of the left rear sleeve and left front pivot assembly.

In the figure: 1 rear outrigger and backrest assembly; 2 left armrest; Three connecting rods; 9 frame; 10 connecting screw; 11 rear leg and frame left wooden pin; 12 left rear sleeve; 13 left rear first pin; 14 rear second support shaft; 15 left rear third pin; 16 left rear fourth pin; 17 left lower third connecting rod; 18 right lower bearing; 19 right lower underwriting; 20 left rear bolt; 21 left rear nut; 22 left lower second pin; 23 left lower second pin; 25 lower left first pin; 26 left lower support beam; 27 left lower third pin; 28 left lower third pin; 29 left front leg; 30 left front bolt; 31 left front nut; 32 left lower first connecting rod; 33 left lower Second connecting rod; 34 left front first pin; 35 left front first pin; 36 front second fulcrum; 37 left front second pin; 38 left front fulcrum; 39 right upper bearing; 40 right upper bearing; 41 right upright beam assembly; 42 upper left first connecting rod; 43 left upper second connecting rod; 44 left upper first pin; 45 left upper first pin; 46 left upper screw; 47 left support assembly; 48 chair seat board; 49 left vertical beam assembly; 50 left Handrail bolt; 51 left handrail nut;

52 right front leg; 53 rear upper bearing; 54 rear upper underwriting; 55 rear lower bearing; 56 rear lower underwriting; 57 front upper bearing; 58 front upper underwriting; 59 front lower bearing; 60 front lower underwriting; Horizontal buttress beam; 63 upper right second pin; 64 upper right second pin; 65 right upper third pin; 66 right upper third pin; 67 right upper third connecting rod; 68 rear leg and frame right wooden pin; 69 right rear sleeve Barrel; 70 left spring; 71 right spring; 72 right rear third pin; 73 right rear fourth pin; 74 right lower third connecting rod; 75 left lower bearing; 76 left lower underwriting; 77 right rear bolt; 78 right rear Nut; 79 rear beam; 80 lower right second pin; 81 lower right second pin; 82 lower right first pin; 83 lower right first pin; 84 right lower beam; 85 lower right third pin ; 86 lower right third pin; 87 front support beam; 88 right front bolt; 89 right front nut; 90 lower right first connecting rod; 91 lower right second connecting rod; 92 right rear fifth pin shaft; Pin; 94 right front support shaft; 95 upper right first connecting rod; 96 left upper bearing; 97 left upper bearing; 98 right upper second connecting rod; 99 right upper first pin shaft; 100 right upper pin; Right support assembly; 104 right handrail bolts; 105 right handrail nuts;

106 unlocking assembly; 107 left horizontal lock bar; 108 left vertical pin; 109 left lock head; 110 left right angle head; 111 front linkage pin; 112 middle support; 113 linkage plate; Head; 117 rear linkage pin; 118 middle screw; 119 right horizontal lock bar; 120 right vertical pin; 121 right lock head;

122 lower left first plate; 123 left lower support; 124 left lower bolt; 125 left lower nut; 126 left lower inner slide frame; 127 left lower bearing; 128 left lower handwheel; Axle; 132 left lower springs; 133 left lower ribs;

134 lower right first plate; 135 lower right bearing; 136 lower right bolt; 137 lower right nut; 138 lower right inner sliding frame; 139 lower right bearing; 140 lower right hand wheel; The second plate; 143 lower right horizontal support shaft; 144 lower right spring; 145 lower right rib plate;

146 lower left pin shafts; 147 lower right pin shafts;

1−1 left leg back; 1−2 upper left wooden pin; 1−3 left inner board; 1−4 top beam; 1−5 middle inner board; 1−6 right inner board; 1−7 upper right wooden pin; 1−8 right leg back; 1−9 lower beam; 1−10 middle wooden pin; 1−11 right lower pin; 1−12 right lower bearing; 1−13 left lower pin; 1−14 left lower bearing;

47−1 left bottom plate; 47−2 left front outer support; 47−3 left middle outer support; 47−4 left rear outer support plate; 47−5 left front inner support plate; 47−6 left middle inner support plate; 47− 7 left rear inner support plate; 47−8 left outer support; 47−9 left inner support;

41−1 right vertical beam; 41−2 right horizontal pin; 41−3 right vertical sleeve;

49−1 left vertical beam; 49−2 left horizontal pin; 49−3 left vertical sleeve;

103−1 right bottom plate; 103−2 right front outer support; 103−3 right middle outer support; 103−4 right rear outer support; 103−5 right front inner support; 103−6 right middle inner support; 103− 7 right rear inner support; 103−8 right outer support; 103−9 right inner support;

106−1 unlock button; 106−2 push rod; 106−3 inclined block; 106−4 left base; 106−5 left bottom screw; 106−6 outer guide bearing; 106−7 outer support shaft; 106−8 inner guide Bearing; 106−9 inner pivot; 106−10 unlocking strut.

Symbols in the figure: B _k the outer width of the chair leg; D the diameter of the hand wheel; H the displacement of the left and right unlocking; H ₁ the displacement of the left and right self-locking; H _z the height change of the chair seat _; The distance between; L ₁ the shortest length of the tension spring; L ₂ the maximum length of the tension spring; L ₁₂ the length variation of the tension spring; K the inner square groove of the frame; L the length of each of the twelve connecting rods; φ ₁ is the angular displacement of the third lower left link; φ ₂ is the angular displacement of the second upper left link.

Detailed ways

The following is a specific embodiment of the present invention, and the present invention will be further described in conjunction with the accompanying drawings.

Combining Figures 1 to 3, and Figures 16 and 19, a metamorphosis chair that helps the elderly living alone to stand up from a sitting position, the rear side of the frame 9 is connected to the back leg and the backrest assembly 1, and the lower front side of the frame 9 is connected Front outrigger assembly. A chair seat plate 48 is provided above the frame 9; a symmetrically arranged left link lifting mechanism and a right link lifting mechanism are connected under the chair seat plate 48. The tension spring assembly connected to the lifting power of the left link lifting mechanism and the right link lifting mechanism in the left link lifting mechanism and the right link lifting mechanism. Both sides on the frame 9 are connected with a left railing assembly 49 and a right railing assembly 41; A self-locking mechanism is connected between the chair seat plate 48 and the frame 9, and an unlocking mechanism for controlling the unlocking of the self-locking mechanism is installed on the left side rail assembly. The unlocking mechanism can also optionally be mounted on the right rail assembly 41 .

With reference to Figures 1 to 3, and Figures 8, 9, 14 and 15,

Rear outrigger and backrest assembly 1. Front outrigger assembly:

It is used to solve the basic configuration of the chair and the installation of other related parts, and solve the problem that the elderly can pull and change positions instead of lifting them when they lean back about 20°;

The front and bottom of the frame 9 are fixedly connected with the left front leg 29 and the right front leg 52 through two upper wooden pins 101, and are respectively fixed with the front upper support 57, rear upper support 53, left upper support 96, and right upper support 39 through six connecting screws 10. . The rear leg and the left pin 11 of the frame connect the frame 9 and the back of the left leg 1−1, and the rear leg and the right wooden pin 68 of the frame connect the frame 9 and the back of the right leg 1−8;

The front upper bearing 57 is fixedly connected with the right front leg 52 by the upper underwriting pin 58 and the left front leg 29 before the front, and the lower bearing 59 is fixedly connected with the right front leg 52 by the front lower underwriting pin 60 and the left front leg 29. The rear upper bearing 53 is fixedly connected with the rear upper underwriting 54 and the left leg 1−1 and the right leg 1−8, and the rear lower bearing 55 is fixed through the rear lower underwriting 56 and the left leg 1−1 and the right leg 1−8. even. The upper left bearing 96 is fixedly connected with the back of the left leg 1−1 through the upper left underwriting pin 97 and the left front leg 29, and the lower left bearing 75 is fixedly connected with the back of the left leg 1−1 through the lower left underwriting pin 76 and the left front leg 29. The upper right bearing 39 is fixedly connected with the back of the right leg 1−8 through the upper right underwriting 40 and the right front leg 52, and the lower right bearing 18 is fixedly connected with the back of the right leg 1−8 through the lower right underwriting 19 and the right front leg 52;

The left end of the top beam 1−4 is fixedly connected with the left leg 1−1 through the upper left wooden pin 1−2, and the right end of the top beam 1−4 is fixed with the right leg 1−8 through the upper right wooden pin 1−7. The upper ends of the left inner panel 1-3, the middle inner panel 1-5, and the right inner panel 1-6 are fixedly connected to the top beam 1-4, and the lower ends are fixedly connected to the lower beam 1-9. The lower beam 1−9 is fixedly connected with the left leg 1−1 and the right leg 1−8 through the middle wooden pin 1−10. The lower right bearing 1−12 is installed on the lower right pin shaft 1−11, and the lower right pin shaft 1−11 is fixedly connected with the back of the right leg 1−8. The left lower bearing 1−14 is installed on the left lower pin shaft 1−13, and the left lower pin shaft 1−13 is fixedly connected with the left leg back 1−1.

When the chair is transposed on the ground, the number of movable components is 3, that is, the lower right bearing is 1−12, and the lower left bearing is 1−14. There are 2 vices, and the degree of freedom relative to the ground is equal to F =3 n -2 P _L -1 P _H =3×3-2×2-1×2=3, which can be freely transposed.

1 to 14, and Figure 18, Figure 20, Figure 21, Figure 23, Figure 24, Figure 26, Figure 27, Figure 29, Figure 30, Figure 47, Figure 48, Figure 50, Figure 51,

Left link lifting mechanism:

The left link lifting mechanism and the right link lifting mechanism are arranged symmetrically about the chair seat, combined with the tension spring assembly, to solve the problem of using the gravity of the elderly to store energy when the chair seat is vertically moving down, and when the vertical translation is rising. The problem of helping the elderly to stand up;

The lower end of the lower left first connecting rod 32 passes through the lower left pin shaft 24 and the left lower support beam 26 to form a revolving pair, and the lower left first pin 25 is used for positioning the lower left first pin shaft 24; the upper end of the lower left first connecting rod 32 passes through the left second branch The shaft 36 and the left front support shaft 38 form a rotary pair, and the left front second pin 37 is used for positioning the front second support shaft 36. The lower end of the second lower left connecting rod 33 passes through the lower left pin shaft 22 and the lower left support beam 26 to form a revolving pair, and the second lower left pin 23 is used to locate the lower left second pin shaft 22; the upper end of the lower left second connecting rod 33 passes through the first left front pin The shaft 34 and the left front support shaft 38 form a revolving pair, and the left front first pin 35 is used for positioning the left front first pin shaft 34 . The lower left third connecting rod 17 lower end passes through the left lower third pin shaft 27 and the left lower support beam 26 to form a revolving pair, and the left lower third pin 28 is used for positioning the left lower third pin shaft 27; the left lower third connecting rod 17 upper end passes through the left rear first The pin shaft 13, the rear second support shaft 14 and the left rear sleeve 12 form a revolving pair;

The left rear sleeve 12 and the left front support shaft 38 form a moving pair;

The lower end of the upper left first connecting rod 42 passes through the left rear third pin shaft 15 and the left rear fourth pin shaft 16 and the left rear sleeve 12 to form a revolving pair; the left upper first connecting rod 42 upper end passes through the left upper first pin shaft 44 and the left branch The seat assembly 47 forms a rotating pair, and the upper left first pin 45 is used for positioning the upper left first pin shaft 44 . The lower end of the upper left second connecting rod 43 passes through the left rear first pin shaft 13 and the rear second support shaft 14 to form a revolving pair with the left rear sleeve 12; the upper end of the left upper second connecting rod 43 passes through the left upper second pin shaft 4 and the left support The assembly 47 constitutes a rotating pair, and the upper left second pin 5 is used for positioning the upper left second pin shaft 4 . The lower end of the upper left third connecting rod 8 forms a revolving pair through the front second support shaft 36 and the left front supporting shaft 38, and the upper end of the upper left third connecting rod 8 forms a revolving pair through the upper left third pin shaft 6 and the left bearing assembly 47. The pin 7 is used for positioning the upper left third pin shaft 6 .

In the same way, the right connecting rod elevating mechanism includes the rear second fulcrum 14, the front second fulcrum 36, the upper right second pin 63, the second upper right pin 64, the third upper right pin 65, the third upper right pin 66, the upper right Third connecting rod 67, right rear sleeve 69, right rear third pin shaft 72, right rear fourth pin shaft 73, right lower third connecting rod 74, right lower second pin shaft 80, right lower second pin 81 , the first lower right pin 82, the first lower right pin 83, the lower right support beam 84, the third lower right pin 85, the third lower right pin 86, the first lower right connecting rod 90, the second lower right connecting rod Rod 91, right rear fifth pin shaft 92, right rear first pin 93, right front support shaft 94, right upper first connecting rod 95, right upper second connecting rod 98, right upper first pin shaft 99, right upper pin 100, right support Seat assembly 103.

The left lower support beam 26 is installed in the left side hole of the rear support beam 79 and the front support beam 87 and is spot welded together, and the right lower support beam 84 is installed in the right side hole of the rear support beam 79 and the front support beam 87 and is spot welded together. The front support beam 87 is fixedly connected with the left front leg 29 by the left front bolt 30 and the left front nut 31 , and the front support beam 87 is fixedly connected with the right front leg 52 by the right front bolt 88 and the right front nut 89 . The rear support beam 79 is fixedly connected with the left leg back 1−1 through the left rear bolt 20 and the left rear nut 21, and the rear support beam 79 is fixedly connected with the right leg back 1−8 through the right rear bolt 77 and the right rear nut 78. The left support assembly 47 and the right support assembly 103 are fixedly installed on the bottom surface of the chair seat plate 48 by bolt groups.

From the perspective of mechanical principles, the right link lifting mechanism is an application of virtual constraints relative to the left link lifting mechanism. The number of movable components of the left link lifting mechanism is n = 9, the low pair number P _L = 13, and the high pair number P _H = 0, degrees of freedom F =3 n -2 P _L -1 P _H =3×9-2×13-1×0=1.

When the chair seat plate is lifted and lowered, the number of movable members is 9, that is, the left support assembly 47, the third connecting rod 8 on the left, the first connecting rod 42 on the left, the second connecting rod 43 on the left, the rear left sleeve 12, the left front support Shaft 38, first lower left connecting rod 32, second lower left connecting rod 33, third lower left connecting rod 17, degree of freedom relative to lower left support beam 26 F =3 n -2 P _L -1 P _H =3×9- 2×13-1×0=1.

In combination with Figure 12, Figure 13, Figure 5, and Figure 50,

Tension spring assembly:

Comprising left spring 70, right spring 71, rear second fulcrum 14, front second fulcrum 36, the front ends of left spring 70 and right spring 71 are hung on the front second fulcrum 36, left spring 70 and right spring 71 The rear end is hung on the rear second support shaft 14.

When the chair seat 48 is at a high or low position and no one is sitting, the tension of the spring is not transmitted vertically to the chair seat 48, and the ratio of the height variation H _z of the chair seat 48 to the length variation L _of the tension spring is designed is 1.317, assuming that the maximum force that the old man needs to help is G , the total maximum tension of the two springs is F ₁₂ , the energy conservation equation is H _z G = L ₁₂ F ₁₂ , the maximum tension F ₁ on the left spring 70 is the same as that of the right spring The maximum pulling force F ₂ on 71 is F ₁ = F ₂ = F ₁₂ /2 = H _z G /2 L ₁₂ =0.6586 G , in this embodiment G = 300 N, F ₁ = F ₂ = 197.58 N, chair seat When the minimum downward force G ₀ of this embodiment on 48 = 50 N, the minimum tension F ₁₀ on the left spring 70 and the minimum tension F ₂₀ on the right spring 71 are F ₁₀ = F ₂₀ =0.6586 G ₀ = 32.93 N.

In combination with Figures 1 to 3, Figures 16 to 19, and Figures 22, 25, 28, 35, 47, and 48,

Left support assembly 47, right support assembly 103, linkage plate 113:

It is used to solve the installation problems of the left link lifting mechanism, the right link lifting mechanism and the self-locking mechanism:

The left bottom plate 47−1 is fixedly connected on the left side bottom surface of the chair seat plate 48 by 10 left upper screws 46. Left front outer support 47−2, left middle outer support 47−3, left rear outer support plate 47−4, left front inner support plate 47−5, left middle inner support plate 47−6, left rear inner support plate 47−7 , the left outer support 47−8 are respectively welded to the left bottom of the left bottom plate 47−1;

The right bottom plate 103−1 is fixedly connected to the right bottom surface of the chair seat plate 48 through 10 right upper screws 102, the right front outer support 103−2, the right middle outer support 103−3, the right rear outer support 103−4, the right front inner The support 103−5, the right middle inner support 103−6, the right rear inner support 103−7, and the right outer support 103−8 are respectively welded to the right bottom of the right bottom plate 103−1;

The middle support 112 is fixedly connected to the middle bottom surface of the chair seat plate 48 by 4 middle screws 118, and the left inner support 47−9 and the right inner support 103−9 are respectively welded on the left and right sides of the bottom of the linkage plate 113.

Combined with Figure 16 and Figure 17,

Self-locking mechanism:

The left lock head 109 is welded on the outer end of the left cross lock bar 107, and the left vertical pin 108 is fixedly installed on the left side of the left cross lock bar 107. The left horizontal lock bar 107 forms a mobile pair with the holes of the left outer support 47−8 and the left inner support 47−9. Left right angle head 110 is fixedly installed on the inboard of left cross lock bar 107, and front linkage pin 111 is fixedly installed on the right side of left right angle head 110, and the front groove of front linkage pin 111 and linkage plate 113 forms high pair. The linkage plate 113 is rotatably mounted on the linkage shaft 114, and the linkage shaft 114 is fixedly installed on the middle support 112, and the middle support 112 is installed below the chair seat plate 48 by four middle screws 118. One end of the linkage spring 115 is installed on the middle support 112, and the other end is installed on the linkage plate 113;

In the same way: the right lock head 121 is welded on the outer end of the right horizontal locking bar 119, and the right vertical pin 120 is fixedly installed on the right side of the right horizontal locking bar 119. The right cross lock bar 119 forms a moving pair with the holes of the right outer support 103−8 and the right inner support 103−9. Right right angle head 116 is fixedly installed in the inner end of right cross lock bar 119, and rear linkage pin 117 is fixedly installed in right angle head 116 left side, and the rear groove of rear linkage pin 117 and linkage plate 113 forms high pair.

In the self-locking mechanism, the number of movable members is 3, that is, the left cross lock bar 107 and the left right angle head 110 and the front linkage pin 111 assembly, the linkage plate 113, the right cross lock bar 119 and the right right angle 116 and the rear linkage pin 117 assembly, There are 2 moving pairs, 1 revolving pair, and 2 high-speed pairs. The degree of freedom relative to the fixed linkage shaft 114 is equal to F =3 n -2 P _L -1 P _H =3×3-2×3-1×2= 1.

1 to 3, 16, 17, 19, 22, 25, 28, 36 to 38, 47, 49,

Left railing beam assembly 49, right railing beam assembly 41, unlocking mechanism:

The unlocking mechanism can be installed on the left railing assembly 49 or the right railing assembly 41, and in this embodiment, the unlocking mechanism is installed on the left railing assembly 49;

The bottom of the left vertical beam 49−1 is installed in the square hole on the left side of the frame 9, and the top is installed in the square hole of the left cross rail 3. The bottom of the right vertical beam 41−1 is installed in the square hole on the right side of the frame 9, and the top is installed in the square hole of the right cross buttress 62. The left buttress 3 is fixedly connected with the back of the left leg 1−1, and the right buttress 62 is connected with the back of the right leg 1−8.

The left vertical cover 49−3 is installed in the vertical hole of the left vertical beam 49−1, and the left horizontal pin 49−2 positions the left vertical cover 49−3 in the left vertical beam 49−1. Unlocking button 106−1 is installed on the top of push rod 106−2, and push rod 106−2 is installed in the hole of left vertical sleeve 49−3, and inclined block 106−3 is fixedly installed on the bottom of push rod 106−2. The left base 106−4 is installed on the left bottom of the frame 9 by four left bottom screws 106−5. One outer guide bearing 106−6 is installed in the hole outside the unlocking pole 106−10 through the outer supporting shaft 106−7, and two inner guiding bearings 106−8 are installed on the unlocking pole 106 through two inner supporting shafts 106−9 −10, they are placed in the slots of the left base 106−4.

The number of movable components of the unlocking mechanism is 4, that is, the inclined block 106−3, the outer guide bearing 106−6, the inner guide bearing 106−8, the unlocking rod 106−10, 1 moving pair, 2 rotating pairs, and the high pair 5, the degree of freedom relative to the left vertical sleeve 49−3 is equal to F =3 n -2 P _L -1 P _H =3×4-2×3-1×5=1.

After the old man sat down, the top surface of the left lock head 109 and the right lock head 121 contacted the bottom surface of the frame 9 with _a length of H1 , and the torsional moment of the linkage spring 115 was set to 0.8N·m, which was used for the left horizontal lock bar 107 and the bottom surface of the frame 9. The automatic extension of right cross lock bar 119, the distance of extension is H. When the unlocking button 106−1 is pressed down, the unlocking rod 106−10 moves H to the inside to realize unlocking.

As shown in Figures 1 to 3, Figures 31 to 34, and Figures 39 to 46,

Left armrest assembly, right armrest assembly:

The left armrest assembly and the right armrest assembly are symmetrical about the chair, and are used as a "crutch" at that time when the old man stands up. You can only use the left armrest, or only use the right armrest, or use the left armrest and the right armrest at the same time, so that the old man Stand up and prepare physically and mentally to get out of the chair.

This embodiment only describes the left armrest assembly in detail;

The left handrail 2 forms a revolving pair with the left handrail 3 through the left handrail bolt 50 and the left handrail nut 51 . The left lower first plate 122 is welded with the left lower support 123 and the left lower rib plate 133 to form a left lower support assembly, which is fixedly installed under the left buttress 3 through the left lower bolt 124 and the left lower nut 125 . The left lower second plate 130 is welded to the middle part of the left lower inner slide frame 126, and the left lower inner slide frame 126 and the left lower support assembly form a moving pair. The left end of the lower left horizontal support shaft 131 is fixedly installed in the hole of the first lower left plate 122, and the right end forms a moving pair with the hole of the second lower left plate 130. The lower left spring 132 is sleeved on the lower left horizontal support shaft 131. Left lower bearing 127 is installed on the top of left lower vertical support shaft 129, and left lower vertical support shaft 129 and left lower bearing 123 form a rotating pair, and left lower hand wheel 128 is fixedly connected with left lower vertical support shaft 129 by left lower pin shaft 146.

When the left lower hand wheel 128 rotates 90° counterclockwise, the left lower bearing 127 pushes the left lower inner slide frame 126 to the left to unlock, and when the left lower hand wheel 128 turns clockwise 90° again, the left lower inner slide frame 126 is pushed by the left lower spring 132 Move down to the right to reset. When used as a chair, the left armrest 2 lies in the groove of the left railing beam 3. When used as a stick, the left armrest 2 is rotated clockwise by 95° by the elderly, and the left lower inner sliding frame 126 is pushed by the left lower spring 132 Moving to the right automatically locks the left handrail 2.

When the left handrail is shifted relative to the left railing, the number of movable members is 1, that is, there are 2 left railings and 1 revolving pair, and the degree of freedom relative to the left railing 3 is equal to F = 3 n -2 P _L - 1 P _H =3×1-2×1-1×0=1. When the left armrest does not move in place, the degree of freedom relative to other parts is equal to 0.

Similarly: the right handrail assembly includes a right handrail 61, a right cross rail 62, a right handrail bolt 104, a right handrail nut 105, a lower right first plate 134; a lower right support 135; a lower right bolt 136; a lower right nut 137; Lower right inner sliding frame 138; Lower right bearing 139; Lower right handwheel 140; Lower right vertical support shaft 141; Lower right second plate 142; Lower right horizontal support shaft 143; Lower right spring 144; The operation of right handrail 61 is the same as left handrail 2.

When the right handrail is shifted relative to the right railing, the number of movable members is 1, that is, the right railing 61, one revolving pair, and the degree of freedom relative to the right railing 62 is equal to F = 3 n -2 P _L - 1 P _H =3×1-2×1-1×0=1. When the right armrest does not move in its original position, the degrees of freedom relative to other parts are equal to 0.

working principle:

When the chair seat 48 was at a high position, the right end face of the left rear sleeve 12 was in contact with the left end face of the left front support shaft 38, the right end face of the right rear sleeve 69 was in contact with the left end face of the right front support shaft 94, and the tension on the tension spring Become the pressure between the two rear sleeves and the two front pivots, not vertically transmitted to the chair seat 48, only when the downward pressure on the chair seat 48 exceeds the initial tension on the tension spring, the chair seat 48 can downlink;

When the seat plate 48 of the chair reaches the low position, the set downward force is 200 N to 500 N. Springs with different rigidities can be installed according to the needs of the elderly. The pressure series are 200 N, 300 N, 400 N, and 500 N. When the elderly When sitting all the time, the chair seat plate 48 remains in place, and when leaving, the force of the chair seat plate 48 being lifted is transmitted to the frame 9 by the left lock head 109 and the right lock head 121;

When it is necessary to lift up, just sit and apply 25 N pressure on the unlocking button 106−1. The six connecting rods in the left connecting rod lifting mechanism are of equal length, and the upper, middle and lower horizontal axes are parallel to each other. The upper part forms a parallelogram mechanism. and the anti-parallelogram mechanism, the lower part forms a parallelogram mechanism and an anti-parallelogram mechanism, φ ₁ = φ ₂ , with the center of circle of the third pin shaft 27 on the lower left as the origin, and the horizontal displacement of the center of the second pin shaft 4 on the left x = L cos (π − φ ₁ ) + L cos φ ₂ = 0, the size of the right link lifting mechanism is the same as that of the left link lifting mechanism.

The beneficial effects of this embodiment are:

When the old man sits down, hold the left railing with the left hand and the right railing with the right hand. The seat of the chair is pressed down by the buttocks to a height of _Hz and stops. The bottom surface of the seat of the chair is in contact with the top of the frame. It is jointly borne by the frame and the tension spring assembly. At this time, it is basically the same as a normal chair . When pressing down the distance of _Hz , it absorbs G percent of the old man's own gravity so that it can be released when standing up from a sitting position to help stand up;

When the old man stands up, the seat of the chair is set in two states. The first state is that the seat of the chair does not move in place, that is, the old man does not need help when standing up, and the old man can stand up directly without any operation; the second state is to help, When the old man is sitting, apply a pressure of 25 N to the unlock button, the left lock head and the right lock head leave the frame, the tension on the left spring and the right spring lifts the chair seat through the left link lifting mechanism and the right link lifting mechanism, help to stand up;

In addition, a left handrail is set on the left railing beam, and a right handrail is set on the right railing beam. When needed, the left handrail is turned up by the left hand and then self-locked to help stand up, and the right handrail is turned up by the right hand Self-locking after erection to help stand up, the erected left armrest and the erected right armrest can help the elderly to stand still before leaving, the height H _z can be customized according to needs, G can be selected according to needs, left armrest and right armrest Decide whether to use it according to your needs;

When the chair is tilted back about 20°, it can be pulled and changed instead of lifted.

A metamorphic mechanism is a mechanism in which the number of effective components, degrees of freedom, and structural form change when the function changes. The chair of the metamorphic mechanism is one of the metamorphic mechanisms. The metamorphic chair is the abbreviation of the metamorphic mechanism chair. When the degree of freedom of the metamorphic chair relative to the four legs is zero, it is an ordinary chair. The degree of freedom is equal to 3 ( F =3 n -2 P _L -1 P _H =3×3-2×2-1×2=3), and the degree of freedom relative to the four legs is equal to 1 ( F = 3 n －2 P _L －1 P _H ＝3×9－2×13－1×0＝1), the degree of freedom of the left handrail relative to the four legs is equal to 1 ( F ＝3 n －2 P _L －1 P _H ＝3×1－2×1－1×0＝1), the degree of freedom of the right handrail relative to the right railing is equal to 1 when it is shifted relative to the four legs ( F ＝3 n -2 P _L -1 P _H =3×1-2×1-1×0=1), the degrees of freedom relative to the four legs are equal to 0 when the left armrest and the right armrest do not move in their original positions.

Claims (9)

1. a kind of change born of the same parents' chair for helping old solitary people to stand up from sitting posture, including frame (9), after frame (9) rear side is connected with Supporting leg and backrest module (1), frame are connected with front leg strut component under (9)；

It is characterized by:

Chair seat plate (48) are equipped with above the frame (9)；

The left connecting rod elevating mechanism being arranged symmetrically, right connecting rod elevating mechanism are connected under the chair seat plate (48)；

It is connected in the left connecting rod elevating mechanism, right connecting rod elevating mechanism to left connecting rod elevating mechanism, right connecting rod elevating mechanism The tension spring component of lifting power；

On the frame (9) two sides be connected with it is horizontal help beam assembly, it is horizontal that help beam assembly include left horizontal helping beam assembly (49), right horizontal helping beam Component (41)；

Left horizontal help on beam assembly (49) is connected with left handrail component, and right horizontal help on beam assembly (41) is connected with right handrail group Part；

It is connected with self-locking mechanism between the chair seat plate (48) and frame (9), is equipped in horizontal help on beam assembly for controlling The unlocking mechanism of self-locking mechanism unlock.

2. the change born of the same parents' chair according to claim 1 for helping old solitary people to stand up from sitting posture, it is characterised in that: after described Supporting leg and backrest module (1) include the left leg back (1 1) being arranged symmetrically, right leg back (1 8), left leg back (1 1), right leg back (1 8) be from top to bottom connected in turn between head piece (1-4), lower beam (1-9), it is rear on hold (53), it is rear under hold (54)；The top Left inside plate (1-3), middle inner panel (1-5), right inner panel (1-6) are connected between crossbeam (1-4), lower beam (1-9)；The left leg back It is provided with dovetail groove on rear side of (1 1) lower end, lower-left bearing (1-14) is installed in left leg back (1 1) dovetail groove；The right leg back (1 8) it is provided with dovetail groove on rear side of lower end, bottom right bearing (1-12) is installed in right leg back (1 8) dovetail groove；The left leg back (1 1), It is fixedly connected in the middle part of right leg back (1 8) with frame (9)；

The front leg strut component includes the left front leg (29) being arranged symmetrically, right front leg (52), left front leg (29), right front leg (52) it Between be from top to bottom connected in turn before on hold (57), front lower hold (59)；The left front leg (29), right front leg (52) upper end and frame (9) it is fixedly connected；

From top to bottom it is connected with that (96) are held in upper left, (75) are held in lower-left between the left leg back (1 1), left front leg (29) in turn；

From top to bottom it is connected with that upper right holds (39), (18) are held in bottom right between the right leg back (1 8), right front leg (52) in turn.

3. the change born of the same parents' chair according to claim 1 for helping old solitary people to stand up from sitting posture, it is characterised in that: the left side Connecting rod lifting mechanism includes lower-left strutbeam (26), and lower-left strutbeam (26) rear portion is hinged with lower-left first connecting rod (32), lower-left second Connecting rod (33), lower-left first connecting rod (32), lower-left second connecting rod (33) parallel arrangement；Lower-left strutbeam (26) front is hinged with lower-left Third connecting rod (17)；

The lower-left first connecting rod (32), lower-left second connecting rod (33) upper end are hinged with left front fulcrum (38), lower-left third connecting rod (17) upper end is hinged with left back sleeve (12)；Left front fulcrum (38) rear end cap is in left back sleeve (12), left front fulcrum (38), left back sleeve (12) is parallel with lower-left strutbeam (26)；

Upper left first connecting rod (42), upper left second connecting rod (43), upper left first connecting rod are hinged on the left back sleeve (12) (42), upper left second connecting rod (43) is arranged in parallel；Upper left third connecting rod (8) are hinged on the left front fulcrum (38)；The left side Upper first connecting rod (42), upper left second connecting rod (43), upper left third connecting rod (8) upper end are hinged with left support abutment component (47)；It is described Left support abutment component (47) is parallel with lower-left strutbeam (26)；

The right connecting rod elevating mechanism includes bottom right strutbeam (84), right anterior branch axis (94), right after sleeve (69)；

The bottom right strutbeam (84), lower-left strutbeam (26) front and back ends be respectively fixedly connected with front supported beam (87), rear strutbeam (79)；The front supported beam (87), rear strutbeam (79) are fixedly connected under rear support leg and backrest module (1) and front leg strut component Portion.

4. the change born of the same parents' chair according to claim 3 for helping old solitary people to stand up from sitting posture, it is characterised in that: the drawing Power spring assembly includes rear second fulcrum (14) being arranged symmetrically, preceding second fulcrum (36)；Second fulcrum (14) both ends after described It is respectively hinged at left back sleeve (12), in right after sleeve (69), preceding second fulcrum (36) both ends are respectively hinged at left front fulcrum (38), on right anterior branch axis (94)；The left side being arranged symmetrically is connected between second fulcrum (14), preceding second fulcrum (36) after described Spring (70) and right spring (71).

5. the change born of the same parents' chair according to claim 1 for helping old solitary people to stand up from sitting posture, it is characterised in that: it is described from Latch mechanism is mounted on left horizontal help on beam assembly (49)；

Self-locking mechanism includes the intermediate support (112) for being fixedly connected on chair seat plate (48) following middle position；The intermediate branch Universal driving shaft (114) are fixedly connected on seat (112)；Universal driving shaft (114) end is rotatably equipped with linkage board (113), linkage Linkage spring (115) is set on axis (114)；The linkage spring (115) upper end is fixedly connected with intermediate support (112), connection Spring (115) lower end of moving is fixedly connected with linkage board (113)；

It is provided with symmetrical preceding slot, pit on the linkage board (113), is slidably fitted with preceding set bar in slot before linkage board (113) (111), rear set bar (117) are slidably fitted in linkage board (113) pit；The preceding set bar (111) is connected with left right angle Head (110), rear set bar (117) are connected with right right-angle head (116)；Left right-angle head (110) other end is connected with left cross locking Bar (107), right right-angle head (116) other end are connected with right cross locking rod (119)；

The left cross locking rod (107), right cross locking rod (119) are arranged symmetrically；

The both ends sliding sleeve of the left cross locking rod (107) is equipped with left outside support (47 8), left inside support (47 9), left outside support (47 8), left inside support (47 9) are fixed under chair seat plate (48)；Left cross locking rod (107) outer end is fixedly connected with left tapered end (109)；Left tapered end (109) lateral surface is inclined-plane, and (109) inclined-plane Zuo Suotou and frame (9) left side are opposite up and down.

6. the change born of the same parents' chair according to claim 5 for helping old solitary people to stand up from sitting posture, it is characterised in that: the left side It is horizontal that beam assembly (49) is helped horizontal to help beam assembly (41) symmetrical with right；

It is described it is left it is horizontal to help beam assembly (49) include left vertical beam (49-1), the lower end Zuo Liliang (49-1) is fixedly connected on frame (9) left side Side, the upper end Zuo Liliang (49-1) be fixedly connected with it is left it is horizontal help beam (3), it is left horizontal to help beam (3) rear end and rear support leg and backrest module (1) It is fixedly connected.

7. the change born of the same parents' chair according to claim 6 for helping old solitary people to stand up from sitting posture, it is characterised in that: the solution Latch mechanism includes left vertical beam (49-1), the left horizontal unlock mounting hole for helping beam (3), frame (9) up and down；The unlock mounting hole In be equipped with push rod (106-2), the upper end push rod (106-2) is fixedly connected with unblock button (106-1), the lower end push rod (106-2) It is fixedly connected with skewback (106-3), skewback (106-3) is slidably mounted on unlock mounting hole lower part；

The left pedestal (106-4) opposite with unlock mounting hole is fixedly connected in the frame (9) downside；The left pedestal Horizontal sliding slot is provided in (106-4), side opening is opposite with unlock mounting hole lower end on left pedestal (106-4) sliding slot, described oblique The block lower end (106-3) is located in left pedestal (106-4) sliding slot, and left pedestal (106-4) sliding slot bottom is provided under skewback (106-3) Hold the elongate slots of tip insertion；It is slidably fitted with unlock strut (106-10) in left pedestal (106-4) sliding slot, unlocks strut The inner end (106-10) and skewback (106-3) relative engagement, the unlock strut outer end (106-10) and the left tapered end in self-locking mechanism (109) relative engagement.

8. the change born of the same parents' chair according to claim 6 for helping old solitary people to stand up from sitting posture, it is characterised in that: the left side Armrest assembly and right handrail component are symmetrical；

The left handrail component includes being hinged on the left horizontal left handrail (2) for helping beam (3) exterior front, the both ends of left handrail (2) to Lower bending, left handrail (2) end are provided with socket；

Left horizontal help under beam (3) is fixedly connected with lower-left support (123)；Front and back perforation is provided in the lower-left support (123) Sliding slot, be slidably fitted with sliding sash in lower-left (126) in lower-left support (123) sliding slot, in lower-left sliding sash (126) front end have with it is left The plug of handrail (2) end socket cooperation；It is fixedly connected with the first plate of lower-left (122) on rear side of the lower-left support (123), it is described The second plate of lower-left (130) is fixed in sliding sash (126) in lower-left；The horizontal fulcrum in lower-left is fixedly connected on the first plate of lower-left (122) (131), the horizontal fulcrum in lower-left (131) front end slides through the second plate of lower-left (130)；It is set on the horizontal fulcrum in lower-left (131) Lower-left spring (132), lower-left spring (132) both ends are against the first plate of lower-left (122), on the second plate of lower-left (130) respectively；

It is rotatably equipped with lower-left in the lower-left support (123) and stands fulcrum (129)；Stand the stretching of fulcrum (129) lower end in the lower-left Lower-left support (123), lower-left stand fulcrum (129) lower end and are fixedly connected with lower-left handwheel (128)；Stand fulcrum (129) in the lower-left Upper end is protruded into sliding sash in lower-left (126), is provided on sliding sash (126) in lower-left and is found the elongate slots that fulcrum (129) passes through for lower-left, It stands fulcrum (129) upper end and is fixedly connected with lower-left bearing (127) in lower-left；The lower-left bearing (127) is against the second plate of lower-left (130) front side.

9. the change born of the same parents' chair according to claim 1 for helping old solitary people to stand up from sitting posture, it is characterised in that: the solution Latch mechanism is mounted on left horizontal help on beam assembly (49).