CN107334591A - It is a kind of that there is the auxiliary lift chair for pulling lifting device - Google Patents

Abstract

The present invention discloses a kind of auxiliary lift chair for having and pulling lifting device, and it includes chair frame and synchronizing bar；The chair frame is provided with chair frame back and left handrail frame and right handrail frame, and the left handrail frame has front support leg and second cross beam；The second cross beam connection chair frame back and the upper end of front support leg；The left handrail frame and right handrail frame are symmetrical；It is respectively and fixedly provided with the left handrail frame and right handrail frame and pulls lifting device；Wherein, first connecting shaft and the second connecting shaft pass through second cross beam, and the gear train and ratchet mechanism are on the outside of the second cross beam, and two connecting rods being hinged with crossbeam are close to the inner side of crossbeam.The present invention pulls lifting device by pulling and drives inconvenient person to stand up, prevent that pulling lifting device down overturns by ratchet mechanism, the lifting frame for pulling lifting device can adjust height within the specific limits, to match the people of different heights, the people of different shoulder breadths can be matched by the distance of the upper end of two lifting frame of adjustment.

Description

An auxiliary rising chair with a hand-pull lifting device

technical field

The invention relates to the field of living and home technology, in particular to an auxiliary rising chair with a hand-pull lifting device.

Background technique

Chairs have become people's daily necessities in daily life. When people sit on a common seat and want to get up or sit down, they need the support of the leg muscles to complete the action. However, it is more difficult for the elderly or those with weak leg muscles to complete this action. Elderly people or people with weak leg muscles need external force to get up and sit down.

The invention patent with the existing publication number CN104274283B is a chair for assisting sitting up, which includes a parallelogram mechanism composed of a chair surface, a connecting rod, a connecting rod and a rocking bar, and a rocker composed of a chair body, a slider, a connecting rod and a rocking bar. Rod slider mechanism. The two mechanisms are combined into a six-bar mechanism. One end of the push rod is hinged with the rocker, and the other end is hinged with the rocker. One end of the rocker is hinged with the push rod, and the other end is hinged with the worm shaft. The rocker rotates to drive the six-bar combination mechanism. When getting up, the worm gear and worm drive drive the rocking bar to rotate clockwise, so that the push rod drives the rocking bar to rotate, so that the slider moves upward along the inner chute, and the chair surface rotates around the pin shaft simultaneously to assist the user to stand up. When sitting down, the user's buttocks are close to the chair surface, and the rocker rotates counterclockwise, so that the rocker drives the slider to move downward, and the chair surface supports the user to sit down; the chair for assisting people to get up When the chair seat is turned over, the human body rotates with the seat seat, which is prone to accidents, such as people falling down because they cannot grasp the armrest of the chair, and it is inconvenient to use at the same time. Slipping and falling from the seat, the angle of the seat turning up is too small, and people cannot lean on the chair to stand up.

Contents of the invention

The technical problem to be solved by the present invention is to propose an auxiliary rising chair with a hand-pull lifting device in view of the above-mentioned deficiencies of the prior art.

The technical solution adopted by the present invention to solve the technical problem is an auxiliary rising chair with a hand-pull lifting device.

A hand lift device comprising:

a gear set, which is connected with a handle rod, and the handle rod is used to drive the gear set;

A lifting frame, which is connected with the gear set, and the rotating gear set drives the lifting frame to rise or fall;

An automatic opening and closing ratchet mechanism, the automatic opening and closing ratchet mechanism is connected with the gear set, and the automatic opening and closing ratchet mechanism is provided with a ratchet, a pawl and an automatic opening and closing assembly;

When the ratchet rotates clockwise and the ratchet exceeds the first preset rotation range, the automatic opening and closing assembly separates the ratchet and the pawl; when the ratchet rotates counterclockwise and the ratchet exceeds the second preset rotation range , the automatic opening and closing assembly engages the ratchet and the pawl.

Further, the gear set is provided with a first connecting shaft, a second connecting shaft, a first gear sleeved on the first connecting shaft, a second gear sleeved on the second connecting shaft, a first one-way bearing and a second Two one-way bearings, the first one-way bearing is sleeved on the first connecting shaft and fixedly connected with the handle rod, the second one-way bearing is arranged between the first connecting shaft and the first gear, the The first gear meshes with the second gear.

Further, the automatic opening and closing assembly is provided with a ratchet sleeve set on the ratchet, a first limit pin and a second limit pin arranged on the end surface of the ratchet, the ratchet sleeve is fan-shaped, and when clockwise When the rotating ratchet exceeds the first preset rotation range, the first limit pin pushes the ratchet sleeve, and the ratchet sleeve pushes the pawl to separate the pawl from the ratchet; when the ratchet rotates counterclockwise beyond the first When the second preset rotation range is reached, the second limit pin pushes the ratchet sleeve, and the pawl resets and engages with the ratchet.

Further, the lifting frame is provided with a handle; the handle is fixed on the upper end of the lifting frame, the lower end of the lifting frame has a first crossbeam, the rear end of the first crossbeam is hinged with a first connecting rod, and the first The front end of the beam is hinged with a second connecting rod, and the first connecting rod is fixed on the second connecting shaft;

The lifting frame also has two support rods, an overlapping rod connecting the two support rods and two fixed cylinders, the two fixed cylinders are fixed on the side body of the first beam, and the lower ends of the support rods extend into the In the fixed cylinder, the overlapping rod is located above the fixed cylinder, and the fixed cylinder has a plurality of position-limiting holes, and the plurality of position-limiting holes are arranged in a row up and down.

Further, there is a lift adjuster in the lifting frame, and the lift adjuster has an adjustment button, an iron wire and a detent; the iron wire extends from one support rod, passes through the overlapping rod, and passes through the other support rod , both ends of the iron wire are fixedly connected with the bayonet pin, and the bayonet pin passes through the limiting hole; the adjustment button has a push rod, and the push rod is fixed on the iron wire.

An auxiliary rising chair with a hand-pull lifting device, comprising:

A chair frame is provided with a chair frame back, a left armrest frame and a right armrest frame, and the left armrest frame has a front leg and a second beam; the second beam connects the chair frame back and the upper end of the front leg; the left armrest frame Symmetrical to the right armrest;

Both the left armrest frame and the right armrest frame are fixed with a hand-drawn lifting device; wherein, the first connecting shaft and the second connecting shaft pass through the second beam, and the gear set and the automatic opening and closing ratchet mechanism are close to the On the outer side of the second beam, the first connecting rod is close to the inner side of the second beam, and the second connecting rod is hinged to the second beam.

Further, a first spring is also included, one end of the first spring is fixed on the outside of the second beam, and the other end of the first spring is connected with the pawl.

Further, two second springs are provided on the back of the chair frame, and the back of the chair frame is respectively connected to two pull rods through the two second springs.

Further, it also includes a telescopic synchronizing rod, and the fixing of the synchronizing rod is respectively fixedly connected with the upper ends of the two lifting frames.

Further, the front end of the second beam is provided with a limit block, and the limit block is used as a rotation limit of the second connecting rod;

A partition is provided on the inner side of the second crossbeam, and the partition serves as a limit for the counterclockwise rotation of the first connecting rod and the second connecting rod.

The invention drives the inconvenient person to stand up by pulling the hand-pull lifting device, and prevents the hand-pull lifting device from turning down through the ratchet mechanism. The lifting frame of the hand-pull lifting device can be adjusted in height within a certain range to match people of different lengths. , you can match people with different shoulder widths by adjusting the distance between the upper ends of the two lifting frames.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is the connection schematic diagram of the hand lifting device of the present invention;

Fig. 3 is the automatic opening and closing ratchet mechanism of the present invention;

Fig. 4 is a half-sectional schematic diagram of the lifting frame of the present invention.

detailed description

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

Please refer to FIGS. 1-4 , the present invention is an auxiliary rising chair with a pull-up lifting device, which includes a pull-up lifting device 100 and a chair frame 200 .

The hand-pull lifting device 100 is arranged on the armrests on the left side and the right side of the chair frame 200, and the hand-pull lifting device 100 is used to assist people to get up on the chair.

The manual lifting device 100 includes a gear set 120, an automatic opening and closing ratchet mechanism 130 and a lifting frame 110. There is a hand lever 140 in the gear set 120. By pulling the pull lever 140, the gear set 120 is driven, and the gear set 120 drives the lifting frame 110 to Rotate clockwise, when the lifting frame 110 rotates clockwise, the lifting frame 110 is in a raised state.

Example 1:

A gear set 120, which is connected with a handle rod 140, and the handle rod is used to drive the gear set 120;

Lifting frame 110, which is connected with the gear set 120, and the rotating gear set 120 drives the lifting frame 110 to rise or fall;

An automatic opening and closing ratchet mechanism, the automatic opening and closing ratchet mechanism is connected with the gear set 120, and the automatic opening and closing ratchet mechanism is provided with a ratchet 131, a ratchet 132 and an automatic opening and closing assembly;

When the ratchet 131 rotates clockwise and the ratchet 131 exceeds the first preset rotation range, the automatic opening and closing assembly separates the ratchet 131 and the pawl 132; when the ratchet 131 rotates counterclockwise and the ratchet 131 exceeds the second When the preset rotation range is reached, the automatic opening and closing assembly engages the ratchet wheel 131 and the ratchet pawl 132 .

The first preset rotation range is when the ratchet 131 and the pawl 132 are engaged, and the ratchet 131 can only rotate clockwise. If the ratchet 131 rotates beyond this range, the ratchet 131 can rotate counterclockwise.

The second preset rotation range is that the ratchet 131 and the ratchet 132 are in a disengaged state. Within this range, the ratchet 131 can rotate clockwise or counterclockwise, and the clockwise rotation limit is determined by controlling the rotation limit of the first connecting rod 119a. Control, the limit of counterclockwise rotation is that the second limit pin 135 pushes the ratchet sleeve 133, so that the ratchet sleeve 133 is disengaged from between the ratchet 132 and the ratchet 131, and the ratchet 132 resets and engages with the ratchet 131.

The gear set 120 is provided with a first connecting shaft 121, a second connecting shaft 122, a first gear 123 sleeved on the first connecting shaft 121, a second gear 124 sleeved on the second connecting shaft 122, a first unit To the bearing 125 and the second one-way rotating shaft 126, the first gear 123 meshes with the second gear 124; the hand lever 140 is fixed on the first one-way bearing 125; pull the hand lever 140 counterclockwise, the hand The pull rod 140 drives the first connecting shaft 121 to rotate counterclockwise, the first gear 123 rotates counterclockwise, the second gear 124 meshing with the first gear 123 rotates clockwise, and the first one-way bearing 125 There is no relative rotation with the handle rod 140 , when the handle rod 140 is pulled clockwise, the handle rod 140 rotates clockwise with the first connecting shaft 121 as a fulcrum, and the first connecting shaft 121 is stationary.

The automatic opening and closing ratchet mechanism 130 is provided with a ratchet 131 coaxial with the second gear 124, a ratchet 132, and an automatic opening and closing assembly. The first limit pin 134 and the second limit pin 135 on the end face of 131, the ratchet sleeve 133 is fan-shaped, when the clockwise rotating ratchet 131 exceeds the first preset rotation range, the first limit The pin 134 pushes the ratchet sleeve, and the ratchet sleeve pushes the pawl to separate the pawl from the ratchet 131; at this time, the ratchet withdraws from the tooth groove of the ratchet 131; wherein, the ratchet 131 rotates at the first preset When rotating within the range, the ratchet 131 can only rotate clockwise, and the ratchet blocks the ratchet 131 so that the ratchet 131 cannot rotate counterclockwise.

When the ratchet 131 rotating counterclockwise exceeds the second preset rotation range, the second limit pin 135 pushes the ratchet sleeve, and the ratchet resets (the ratchet extends into the tooth groove of the ratchet 131) and engages with the ratchet 131, wherein When the ratchet 131 rotates within the second preset rotation range, the ratchet does not limit the rotation direction of the ratchet 131 .

When the ratchet 131 rotates, the first limit pin 134 or the second limit pin 135 on the ratchet 131 pushes the ratchet sleeve 133 to rotate, and the ratchet 132 extends into the tooth groove of the ratchet 131 to limit the counterclockwise rotation of the ratchet 131 .

When the second gear 124 rotates clockwise, the second connecting shaft 122 also rotates clockwise, and the second connecting shaft 122 drives the lifting frame 110 to rotate clockwise; the pawl 132 extends into the ratchet 131 , the ratchet 131 rotates clockwise within a preset range, and the ratchet 132 can prevent the ratchet 131 from rotating counterclockwise.

If the rotation of the ratchet 131 exceeds the first preset rotation range, the first limit pin 134 on the ratchet 131 contacts the ratchet sleeve 133, and the first limit pin 134 promotes the rotation of the ratchet sleeve 133, and the rotation of the ratchet sleeve 133 The ratchet 132 is withdrawn from the tooth groove of the ratchet 131, and the ratchet sleeve 133 is stuck between the ratchet 132 and the tooth groove of the ratchet 131. At this time, the ratchet 132 cannot limit the rotation of the ratchet 131 counterclockwise. If the ratchet 131 rotates counterclockwise to the second preset rotation range, the second limit pin 135 touches the ratchet sleeve 133, pushes the ratchet sleeve 133 to rotate counterclockwise, and the ratchet sleeve 133 moves from the pawl 132 and Withdraw between the ratchet wheels 131, and the ratchet pawls 132 extend into the tooth grooves of the ratchet wheels 131 again.

The lifting frame 110 is provided with a handle 111; the handle 111 is fixed on the upper end of the lifting frame 110, the lower end of the lifting frame 110 has a first beam 112, and the rear end of the first beam 112 is hinged with a first connecting rod 119a, the front end of the first beam 112 is hinged with a second connecting rod 119b, and the first connecting rod 119a is fixed on the second connecting shaft 122 .

When the second connecting shaft 122 rotates clockwise, the first connecting rod 119a also rotates clockwise. When the lifting frame 110 rotates clockwise from the initial position to the end position, the lifting frame 110 first rises. The initial position is the position when the first connecting rod 119a and the second connecting rod 119b are parallel to the first beam 112 . The end position is the position where the first connecting rod 119a can rotate at the maximum angle, and the rotation range from the initial position to the end position of the first connecting rod 119a corresponds to the preset rotation range of the ratchet 131 .

The lifting frame 110 has two support rods 113, a connecting rod 114 connecting the two support rods 113, and two fixed cylinders 115, and the two fixed cylinders 115 are fixed on the side of the first beam 112, and the support The lower end of the rod 113 extends into the fixed cylinder 115, the overlapping rod 114 is located above the fixed cylinder 115, the fixed cylinder 115 has a plurality of limiting holes, and the plurality of limiting holes are arranged up and down a row.

There is a lift regulator in the lift frame 110, and the lift regulator has an adjustment button 116, an iron wire 117 and a bayonet pin 118; The support rod 113 passes through, and the two ends of the iron wire 117 are respectively fixedly connected with the bayonet pin 118, and the bayonet pin passes through the limit hole; the adjustment button 116 has a push rod, and the push rod is fixed on the On the iron wire 117. The two ends of the iron wire 117 are covered with bayonet springs, one end of the bayonet spring is against the bayonet 118, and the other end is against the support rod 113, and the bayonet spring is covered with an anti-twist sleeve to prevent the bayonet spring from bending .

The height of the lifting frame 110 is adjustable, wherein the strength of the two fixed cylinders 115 is large enough, the more the two support rods 113 protrude from the two fixed cylinders 115, the higher the lifting frame 110 will be. .

The height of the lift frame 110 can be adjusted by the lift adjuster, and the adjustment button 116 also has two small springs, one end of the small springs withstands the lapping rod 114, and the other end of the small springs withstands the lap rod 114. Adjust the button 116, press the adjusting button 116, the push rod withstands the iron wire 117, the two ends of the iron wire 117 shrink toward the middle, the bayonet spring is in a compressed state, the bayonet retracts from the limiting hole, and then adjust the support The relative position of the rod 113 and the fixed cylinder 115 can then adjust the height of the lifting frame 110, release the adjustment button 116, the two small springs will naturally elongate, the bayonet spring will naturally elongate, and the bayonet pin 118 will be fixed. Limiting holes protrude from the barrel 115 , so that the support rod 113 is fixed in the fixing barrel 115 . The height of the lifting frame 110 is adjusted by the lifting regulator, so that the height of the lifting frame 110 can be matched with people of different body lengths.

During the lifting process of the lifting frame 110: pull the handle rod 140 repeatedly to realize the intermittent lifting of the lifting frame 110. When the handle rod 140 rotates counterclockwise, the first connecting shaft 121 rotates counterclockwise, and the first gear 123 rotates counterclockwise. Rotate, drive the second gear 124 to rotate clockwise, the second gear 124 rotates clockwise, the second connecting shaft 122 also rotates clockwise with the second gear 124, the second connecting shaft 122 drives the first connecting rod 119a clockwise Turn clockwise, the first connecting rod 119a is from the horizontal state to the erect state, the lifting frame 110 rises, and the lifting frame 110 can only be lifted when the hand lever 140 rotates counterclockwise. When the hand lever 140 rotates clockwise, because the first single Due to the bearing 125, the first rotating shaft cannot be driven to rotate, so when the handle bar 140 rotates clockwise, the elevating frame 110 remains still (does not rise or fall).

To lower the lifting frame 110, pull the hand lever 140 counterclockwise to rotate the ratchet clockwise until the first limit pin 134 pushes the ratchet sleeve 133, allowing the ratchet sleeve 133 to push the ratchet 132 from the tooth groove in the ratchet 131 Open, the ratchet sleeve 133 is stuck between the ratchet 132 and the ratchet 131. At this time, the ratchet 131 can rotate counterclockwise, and the first connecting rod 119a can be rotated counterclockwise, and the lifting frame 110 is lowered. At this time, the second The two connecting shafts 122 rotate counterclockwise, the ratchet 131 rotates counterclockwise, the second gear 124 rotates counterclockwise, and the second gear 124 drives the first gear 123 to rotate clockwise. Because the second one-way bearing 126 is arranged between the first gear 123 and the first connecting shaft 121, so the first connecting shaft 121 does not rotate with the first gear 123, therefore, when the lifting frame 110 descends, the hand The tie rod 140 is stationary.

Example 2:

The hand lifting device 100 is arranged on the left side of the chair frame 200 and the armrest frame on the right side, the chair frame 200 is provided with a chair frame back 210 and a left armrest frame 220 and a right armrest frame 230; the left armrest frame 220 It has a front leg 221 and a second beam 222 ; the second beam 222 connects the back 210 of the chair frame and the upper end of the front leg 221 ; the left armrest frame 220 is symmetrical to the right armrest frame 230 .

Both the left armrest frame 220 and the right armrest frame 230 are fixed with a manual lifting device 100; wherein, the first connecting shaft 121 and the second connecting shaft 122 pass through the second beam 222, and the gear set 120 and the automatic The opening and closing ratchet mechanism 130 is close to the outside of the second beam 222 , the first connecting rod 119 a is close to the inside of the second beam 222 , and the second connecting rod 119 b is hinged to the second beam 222 .

When using an auxiliary rising chair with a hand-pull lifting device 100, the lifting frame 110 is supported under people's armpits, and the left and right hands pull the pull rod at the same time, and the pull rod counterclockwise drives the gear set 120, and the gear set 120 drives the lift. The frame 110 rotates, wherein the first link 119a and the second link 119b on the lifting frame 110 rotate clockwise.

The outside of the second beam 222 is fixed with a first spring, the lower end of the first spring is fixed on the outside of the second beam 222, and the other end is connected to the head of the pawl 132, and the pawl 132 is connected to the pawl 132. The outer side of the second beam 222 is hinged. When the ratchet 131 rotates clockwise, the ratchet 132 repeatedly extends into the tooth groove of the ratchet 131 and withdraws from the tooth groove of the ratchet 131. The first spring is the ratchet 132 stretches into the tooth groove of ratchet 131 and provides power.

The back of the chair frame 210 is provided with two second springs 211, the back of the chair frame 210 is respectively connected to the two handle bars 140 through the two second springs 211, and the second springs 211 can limit the handle bar The range of clockwise rotation of 140, when people accidentally pull the hand lever 140 too much, the hand lever 140 can provide people with a certain supporting force to prevent people from falling.

The front end of the second beam 222 is provided with a limit block 223, the limit block 223 is used as the rotation limit of the second connecting rod 119b, the limit block 223 has a damping spring, the limit block 223 The position is the extreme position where the second connecting rod 119b rotates clockwise, and the damping spring on the limiting block 223 acts as a buffer to prevent the second connecting rod 119b from directly hitting the limiting block 223, avoiding the discomfort of a hard landing feel.

Telescopic synchronous rod 300, the fixing of described synchronous rod 300 is fixedly connected with the upper end of two described lifting frames 110 respectively, can adjust the distance of the upper end of two described lifting frames 110 by synchronous rod 300, make the left side as far as possible Both the lifting frame 110 and the right side can be supported under people's armpits.

The inner side of the second beam 222 is provided with a baffle, and the baffle acts as a limit for counterclockwise rotation of the first connecting rod 119 a and the second connecting rod 119 b.

In this embodiment, when the human body stands firmly and pulls the lifting frame 140 until the second connecting rod 119b will touch the limit block 223, at this time the ratchet sleeve 133 rotates to just right under the action of the first limit pin 134. Contacting with the pawl 132, the pawl 132 presses the ratchet sleeve 133 under the pull of the small spring. At this time, the ratchet 131 and the pawl 132 are separated, and the first connecting rod 119a can rotate counterclockwise. When the rotation is close to the initial position (about to be in contact with the shelf), the second limit pin 135 just pushes the ratchet sleeve 133 down and when the first connecting rod 119a and the second connecting rod 119b are in full contact with the shelf, the ratchet 131, The pawl 132 just makes contact again.

A toilet 400 can be provided on the underside of the auxiliary lifting chair with a hand-pull lifting device, and the toilet 400 includes a backrest 410 and a toilet seat 420; 400, it is convenient for the handicapped person to go to the toilet, and the handicapped person can use the auxiliary rising chair with the hand-pull lifting device 100 to get up.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (10)

1. one kind pulls lifting device, it is characterised in that including：

Gear train, it is connected with hand lever, and the hand lever is used to drive the gear train；

Lifting frame, it is connected with the gear train, and lifting frame described in the gear set drive of rotation rises or falls；

Automatic division ratchet mechanism, the automatic ratchet mechanism are connected with the gear train, and the automatic division ratchet mechanism is set There are ratchet, ratchet and automatic division component；

When ratchet rotates clockwise and the ratchet is more than the first default slewing area, the automatic division component makes ratchet Separated with ratchet；When ratchet rotates counterclockwise and the ratchet is more than the second default slewing area, the automatic division group Part engages ratchet and pawl.

2. one kind pulls lifting device according to claim 1, it is characterised in that：The gear train be provided with the first connecting shaft, Second connecting shaft, the first gear being enclosed in the first connecting shaft, the second gear being enclosed in the second connecting shaft, the first unilateral bearing With the second unilateral bearing, first unilateral bearing is enclosed in the first connecting shaft and is fixedly connected with the hand lever, and described Two unilateral bearings are arranged between the first connecting shaft and first gear, first gear and the second gear engagement.

3. one kind pulls lifting device according to claim 2, it is characterised in that：The automatic division component, which is provided with, is enclosed on spine Ratchet sleeve on wheel, the first spacer pin and the second spacer pin being arranged on the end face of the ratchet, the ratchet sleeve in sector, When the ratchet rotated clockwise is more than the first default slewing area, first spacer pin promotes the ratchet sleeve, described Ratchet sleeve promotes ratchet ratchet is separated with the ratchet；When the ratchet rotated counterclockwise is more than the second default slewing area When, second spacer pin promotes ratchet sleeve, and ratchet pawl reset engages with the ratchet.

4. one kind pulls lifting device according to claim 3, it is characterised in that：The lifting frame is provided with handle；The drawing Hand is fixed on the upper end of lifting frame, and the lower end of the lifting frame has first crossbeam, and the rear end of the first crossbeam is hinged with One connecting rod, the front end of the first crossbeam are hinged with second connecting rod, and the first connecting rod is fixed in the second connecting shaft；

The lifting frame also has two support bars, connects the lap bars and two fixed cylinders of two support bars, two fixed cylinders It is fixed on the leaning to one side of the first crossbeam, the lower end of the support bar is stretched into the fixed cylinder, and the lap bars are located at institute The top of fixed cylinder is stated, the fixed cylinder has multiple spacing holes, and the multiple spacing hole is arranged in a row up and down.

5. one kind according to claim 4 pulls lifting device, it is characterised in that：There is lifting regulation in the lifting frame Device, the lifting adjuster have regulation button, iron wire and bayonet lock；The iron wire stretches into from a support bar, by overlap joint Bar, passed from another support bar, the both ends of the iron wire are fixedly connected with the bayonet lock, and the bayonet lock passes through spacing hole； The regulation button has push rod, and the push rod is scheduled on the iron wire.

6. a kind of have the auxiliary lift chair for pulling lifting device, it is characterised in that including：

Chair frame, provided with chair frame back and left handrail frame and right handrail frame, the left handrail frame has front support leg and second cross beam； The second cross beam connection chair frame back and the upper end of front support leg；The left handrail frame and right handrail frame are symmetrical；

It is respectively and fixedly provided with the left handrail frame and right handrail frame and pulls lifting device according to any one of claim 1 to 5； Wherein, first connecting shaft and the second connecting shaft pass through second cross beam, and the gear train and automatic division ratchet mechanism are close On the outside of the second cross beam, the first connecting rod is cut with scissors close to the inner side of second cross beam, the second connecting rod with the second cross beam Connect.

It is 7. according to claim 6 a kind of with the auxiliary lift chair for pulling lifting device, it is characterised in that：Also include the One spring, one end of first spring are fixed on the outside of the second cross beam, and its other end is connected with ratchet.

It is 8. according to claim 6 a kind of with the auxiliary lift chair for pulling lifting device, it is characterised in that：The chair frame Back is provided with two second springs, and the chair frame back is connected with two hand levers respectively by two described second springs.

It is 9. according to claim 6 a kind of with the auxiliary lift chair for pulling lifting device, it is characterised in that：Also including can Flexible synchronizing bar, the upper end of the fixation of the synchronizing bar respectively with two lifting frame are fixedly connected.

It is 10. according to claim 6 a kind of with the auxiliary lift chair for pulling lifting device, it is characterised in that：Described The front end of two crossbeams is provided with limited block, and the limited block is used for the rotation boundary as second connecting rod；

The inner side of the second cross beam is provided with dividing plate, the boundary that the dividing plate rotates counterclockwise as first connecting rod and second connecting rod Limit.