CN107334591B - Auxiliary rising chair with hand-pulling lifting device - Google Patents
Auxiliary rising chair with hand-pulling lifting device Download PDFInfo
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- CN107334591B CN107334591B CN201710508801.2A CN201710508801A CN107334591B CN 107334591 B CN107334591 B CN 107334591B CN 201710508801 A CN201710508801 A CN 201710508801A CN 107334591 B CN107334591 B CN 107334591B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
- A61G7/1001—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto specially adapted for specific applications
- A61G7/1009—Buttock lifting device for placing bed-pans under patients
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/10—General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
- A61G2203/14—Joysticks
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Abstract
The invention discloses an auxiliary rising chair with a hand-pulling lifting device, which comprises a chair frame and a synchronizing rod; the chair frame is provided with a chair frame back part, a left armrest frame and a right armrest frame, and the left armrest frame is provided with a front support leg and a second cross beam; the second cross beam is connected with the back of the chair frame and the upper end of the front supporting leg; the left armrest frame is symmetrical to the right armrest frame; the left handrail frame and the right handrail frame are both fixed with a hand-pulling lifting device; the first connecting shaft and the second connecting shaft penetrate through a second cross beam, the gear set and the ratchet mechanism are close to the outer side of the second cross beam, and the two connecting rods hinged to the cross beam are close to the inner side of the cross beam. The invention drives the inconvenient people to get up by pulling the hand-pulling lifting device, prevents the hand-pulling lifting device from turning downwards by the ratchet mechanism, can adjust the height of the lifting frame of the hand-pulling lifting device within a certain range to match people with different body lengths, and can match people with different shoulder widths by adjusting the distance between the upper ends of the two lifting frames.
Description
Technical Field
The invention relates to the technical field of living homes, in particular to an auxiliary rising chair with a hand-pulling lifting device.
Background
In daily life, chairs have become necessities of people. When people sit on a common chair and need to rise or sit down, the leg muscles are required to support forcefully to complete the action. It is difficult for the elderly or people with leg muscle weakness to perform this action. The elderly or people with leg muscle weakness need external force to get up and sit down to complete the exercise.
The patent of the invention with the prior publication number of CN104274283B discloses a chair for assisting in sitting up, which comprises a parallelogram mechanism consisting of a chair surface, a connecting rod and a rocker, and a rocker-slider mechanism consisting of a chair body, a slider, a connecting rod and a rocker. The two mechanisms are combined into a six-rod mechanism. One end of the push rod is hinged with the rocker, the other end of the push rod is hinged with the rocker, one end of the rocker is hinged with the push rod, the other end of the rocker is hinged with the worm gear shaft, and the rocker rotates to drive the six-rod combined mechanism. When the chair rises, the worm wheel and the worm drive the rocker to rotate clockwise, so that the push rod drives the rocker to rotate, the sliding block moves upwards along the inner sliding groove, and meanwhile, the chair surface rotates around the pin shaft to assist a user to stand. When sitting down, the buttocks of a user cling to the chair surface, the rocker rotates anticlockwise, the rocker drives the sliding block to move downwards, and meanwhile the chair surface supports the user to sit down; when the chair assisting in sitting up helps people to stand up, the chair seat is turned, the body of people rotates along with the chair seat, accidents easily occur, for example, people grab the armrest of an unstable chair and fall down, the chair seat is inconvenient to use, the angle of the upward turning of the chair seat is too large, people easily slip down from the chair seat, the angle of the upward turning of the chair seat is too small, and people cannot stand up by leaning on the chair.
Disclosure of Invention
The invention provides an auxiliary rising chair with a hand-pulling lifting device, aiming at the defects in the prior art.
The invention solves the technical problem by adopting the technical scheme that the invention relates to an auxiliary rising chair with a hand-pulling lifting device.
A hand pulling hoist, comprising:
the gear set is connected with a hand lever, and the hand lever is used for driving the gear set;
the lifting frame is connected with the gear set, and the rotating gear set drives the lifting frame to ascend or descend;
the automatic opening and closing ratchet mechanism is connected with the gear set and is provided with a ratchet wheel, a pawl and an automatic opening and closing assembly;
when the ratchet wheel rotates clockwise and exceeds a first preset rotation range, the automatic opening and closing assembly enables the ratchet wheel and the pawl to be separated; and when the ratchet wheel rotates anticlockwise and exceeds a second preset rotation range, the automatic opening and closing assembly enables the ratchet wheel to be meshed with the pawl.
Furthermore, the gear train is equipped with first connecting axle, second connecting axle, cover first gear, the cover second gear, first one-way bearing and the one-way bearing of second on the first connecting axle of first connecting axle, cover on the second connecting axle, first one-way bearing housing on first connecting axle and with hand lever fixed connection, the one-way bearing of second sets up between first connecting axle and first gear, first gear and the meshing of second gear.
Furthermore, the automatic opening and closing assembly is provided with a ratchet sleeve sleeved on the ratchet wheel, and a first limit pin and a second limit pin which are arranged on the end surface of the ratchet wheel, wherein the ratchet sleeve is in a fan shape, when the ratchet wheel rotating clockwise exceeds a first preset rotating range, the first limit pin pushes the ratchet sleeve, and the ratchet sleeve pushes the pawl to separate the pawl from the ratchet wheel; when the ratchet wheel rotating anticlockwise exceeds a second preset rotating range, the second limiting pin pushes the ratchet wheel sleeve, and the pawl resets and is meshed with the ratchet wheel.
Further, a handle is arranged on the lifting frame; the handle is fixed at the upper end of the lifting frame, the lower end of the lifting frame is provided with a first cross beam, the rear end of the first cross beam is hinged with a first connecting rod, the front end of the first cross beam is hinged with a second connecting rod, and the first connecting rod is fixed on a second connecting shaft;
the lifting frame still has two bracing pieces, connects the overlap joint pole and two fixed cylinders of two bracing pieces, and two fixed cylinders are fixed on the side of first crossbeam, the lower extreme of bracing piece stretches into in the fixed cylinder, the overlap joint pole is located the top of fixed cylinder, fixed cylinder has a plurality of spacing holes, a plurality of spacing holes are arranged into one row from top to bottom.
Furthermore, a lifting regulator is arranged in the lifting frame, and the lifting regulator is provided with an adjusting button, an iron wire and a clamping pin; the iron wire extends into one support rod, passes through the lapping rod and penetrates out of the other support rod, two ends of the iron wire are fixedly connected with the clamping pins, and the clamping pins penetrate through the limiting holes; the adjusting button is provided with a push rod, and the push rod is fixed on the iron wire.
An assisted rise chair with hand-pulled lift comprising:
the chair frame is provided with a chair frame back part, a left armrest frame and a right armrest frame, and the left armrest frame is provided with a front support leg and a second cross beam; the second cross beam is connected with the back of the chair frame and the upper end of the front supporting leg; the left armrest frame and the right armrest frame are symmetrical;
the left handrail frame and the right handrail frame are both fixed with a hand-pulling lifting device; the first connecting shaft and the second connecting shaft penetrate through the second cross beam, the gear set and the automatic opening and closing ratchet mechanism are close to the outer side of the second cross beam, the first connecting rod is close to the inner side of the second cross beam, and the second connecting rod is hinged to the second cross beam.
Furthermore, the device also comprises a first spring, wherein one end of the first spring is fixed on the outer side of the second cross beam, and the other end of the first spring is connected with the pawl.
Furthermore, two second springs are arranged on the back of the chair frame, and the back of the chair frame is connected with the two hand pull rods through the two second springs respectively.
Furthermore, the lifting frame further comprises a telescopic synchronizing rod, and the synchronizing rod is fixedly connected with the upper ends of the two lifting frames respectively.
Furthermore, a limiting block is arranged at the front end of the second cross beam and used as a rotation limit of the second connecting rod;
and a partition plate is arranged on the inner side of the second cross beam and serves as a limit for counterclockwise rotation of the first connecting rod and the second connecting rod.
According to the invention, the hand-pulling lifting device is pulled to drive the person who is inconvenient to get up, the hand-pulling lifting device is prevented from turning downwards through the ratchet mechanism, the heights of the lifting frames of the hand-pulling lifting device can be adjusted within a certain range to match people with different lengths, and the distances between the upper ends of the two lifting frames can be adjusted to match people with different shoulder widths.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic connection diagram of the hand pulling device of the present invention;
FIG. 3 is an automatic opening and closing ratchet mechanism of the present invention;
fig. 4 is a schematic half-section view of the lifting frame of the present invention.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Referring to fig. 1-4, the present invention provides an auxiliary rising chair with a hand-pulling lifting device, which comprises a hand-pulling lifting device 100 and a chair frame 200.
The hand-pulling lifting device 100 is arranged on the armrests on the left side and the right side of the chair frame 200, and the hand-pulling lifting device 100 assists people to get up on the chair.
The hand pulling lifting device 100 comprises a gear set 120, an automatic opening and closing ratchet mechanism 130 and a lifting frame 110, wherein a hand pulling rod 140 is arranged in the gear set 120, the gear set 120 is driven by the pulling hand pulling rod 140, the gear set 120 drives the lifting frame 110 to rotate clockwise, and when the lifting frame 110 rotates clockwise, the lifting frame 110 is in a lifting state.
Example 1:
a gear set 120 to which a hand lever 140 is connected, the hand lever being used to drive the gear set 120;
the lifting frame 110 is connected with the gear set 120, and the rotating gear set 120 drives the lifting frame 110 to ascend or descend;
the automatic opening and closing ratchet mechanism is connected with the gear set 120 and is provided with a ratchet wheel 131, a pawl 132 and an automatic opening and closing component;
when the ratchet wheel 131 rotates clockwise and the ratchet wheel 131 exceeds a first preset rotation range, the automatic clutch assembly enables the ratchet wheel 131 and the pawl 132 to be separated; when the ratchet wheel 131 rotates counterclockwise and the ratchet wheel 131 exceeds a second predetermined rotation range, the automatic opening and closing assembly engages the ratchet wheel 131 with the pawl 132.
The first predetermined range of rotation is that ratchet 131 and pawl 132 are engaged, and ratchet 131 can only rotate clockwise, and ratchet 131 can rotate counterclockwise when the rotation exceeds this range.
The second preset rotation range is that the ratchet wheel 131 and the pawl 132 are in a separated state, in this range, the ratchet wheel 131 can rotate clockwise or counterclockwise, the clockwise rotation limit is controlled by controlling the rotation limit of the first link 119a, the counterclockwise rotation limit is that the second limit pin 135 pushes the ratchet sleeve 133, the ratchet sleeve 133 is disengaged from between the pawl 132 and the ratchet wheel 131, and the pawl 132 is reset to be engaged with the ratchet wheel 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 one-way bearing 125 and a second one-way rotating shaft 126, wherein the first gear 123 is meshed with the second gear 124; a hand lever 140 is fixed on the first one-way bearing 125; pulling the hand lever 140 in the counterclockwise direction, the hand lever 140 drives the first connecting shaft 121 to rotate counterclockwise, the first gear 123 rotates counterclockwise, and the second gear 124 engaged with the first gear 123 rotates clockwise, the first one-way bearing 125 does not rotate relative to the hand lever 140, when the hand lever 140 is pulled clockwise, the hand lever 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 wheel 131, a pawl 132 and an automatic opening and closing component which are coaxial with the second gear 124, the automatic opening and closing component comprises a ratchet sleeve 133 sleeved on the ratchet wheel 131, a first limit pin 134 and a second limit pin 135 which are arranged on the end surface of the ratchet wheel 131, the ratchet sleeve 133 is in a sector shape, when the ratchet wheel 131 rotating clockwise exceeds a first preset rotating range, the first limit pin 134 pushes the ratchet sleeve, and the ratchet sleeve pushes the pawl to separate the pawl from the ratchet wheel 131; at this time, the pawl is withdrawn from the tooth grooves of the ratchet wheel 131; when the ratchet wheel 131 rotates within the first preset rotation range, the ratchet wheel 131 can only rotate clockwise, and the pawl blocks the ratchet wheel 131 so that the ratchet wheel 131 cannot rotate counterclockwise.
When the ratchet wheel 131 rotating counterclockwise exceeds a second preset rotating range, the second limit pin 135 pushes the ratchet sleeve, and the pawl reset (the pawl extends into the tooth groove of the ratchet wheel 131) is engaged with the ratchet wheel 131, wherein when the ratchet wheel 131 rotates within the second preset rotating range, the pawl does not limit the rotating direction of the ratchet wheel 131.
When the ratchet wheel 131 rotates, the first limit pin 134 or the second limit pin 135 on the ratchet wheel 131 pushes the ratchet sleeve 133 to rotate, and the pawl 132 extends into the tooth slot of the ratchet wheel 131 to limit the ratchet wheel 131 from rotating counterclockwise.
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 also rotate clockwise; the pawl 132 protrudes into the tooth slot of the ratchet wheel 131, the ratchet wheel 131 rotates clockwise within a preset range, and the pawl 132 can prevent the ratchet wheel 131 from rotating counterclockwise.
If the rotation of the ratchet wheel 131 exceeds the first preset rotation range, the first limit pin 134 on the ratchet wheel 131 contacts the ratchet sleeve 133, the first limit pin 134 pushes the ratchet sleeve 133 to rotate, the rotation of the ratchet sleeve 133 withdraws the pawl 132 from the tooth socket of the ratchet wheel 131, the ratchet sleeve 133 is clamped between the pawl 132 and the tooth socket of the ratchet wheel 131, at this time, the pawl 132 cannot limit the ratchet wheel 131 to rotate counterclockwise, if the ratchet wheel 131 rotates counterclockwise to the second preset rotation range, the second limit pin 135 contacts the ratchet sleeve 133 to push the ratchet sleeve 133 to rotate counterclockwise, the ratchet sleeve 133 withdraws from between the pawl 132 and the ratchet wheel 131, and the pawl 132 extends into the tooth socket of the ratchet wheel 131.
The lifting frame 110 is provided with a handle 111; the handle 111 is fixed at the upper end of the lifting frame 110, the lower end of the lifting frame 110 is provided with a first cross beam 112, the rear end of the first cross beam 112 is hinged with a first connecting rod 119a, the front end of the first cross beam 112 is hinged with a second connecting rod 119b, and the first connecting rod 119a is fixed on a second connecting shaft 122.
When the second connecting shaft 122 rotates clockwise, the first link 119a also rotates clockwise, and when the lifting frame 110 rotates clockwise from the initial position to the final position, the lifting frame 110 is lifted and then lowered, and the initial position is a position when the first link 119a, the second link 119b, and the first beam 112 are parallel. The final position is a position of a maximum angle at which the first link 119a can rotate, and a rotation range from an initial position to the final position in which the first link 119a rotates corresponds to a preset rotation range of the ratchet 131.
The lifting frame 110 is provided with two support rods 113, an overlapping rod 114 for connecting the two support rods 113 and two fixed cylinders 115, the two fixed cylinders 115 are fixed on the side of the first cross beam 112, the lower ends of the support rods 113 extend into the fixed cylinders 115, the overlapping rod 114 is located above the fixed cylinders 115, the fixed cylinders 115 are provided with a plurality of limiting holes, and the limiting holes are arranged in a row up and down.
The lifting frame 110 is provided with a lifting adjuster which is provided with an adjusting button 116, an iron wire 117 and a clamping pin 118; the iron wire 117 penetrates through one support rod 113, passes through the lapping rod 114 and penetrates out of the other support rod 113, two ends of the iron wire 117 are fixedly connected with the clamping pins 118 respectively, and the clamping pins penetrate through the limiting holes; the adjustment button 116 has a plunger which is fixed to the iron wire 117. The both ends cover of iron wire 117 has the bayonet lock spring, bayonet lock spring one end supports bayonet lock 118, and the other end supports bracing piece 113, bayonet lock spring cover has prevents turning round the cover, prevents that the bayonet lock spring from bending.
The height of the lifting frame 110 is adjustable, wherein the strength of the two fixed cylinders 115 is large enough, and the more the two support rods 113 extend from the two fixed cylinders 115, the higher the lifting frame 110 is.
The height of lifting frame 110 can pass through the lifting regulator is adjusted, still has two little springs on adjustment button 116, the one end of little spring withstands overlap pole 114, and its other end supports adjustment button 116 presses adjustment button 116, and the ejector pin withstands iron wire 117, and iron wire 117 both ends shrink to the centre, and the bayonet lock spring is in the compression situation, the bayonet lock is followed spacing hole contracts into, adjusts bracing piece 113 again with fixed barrel 115's relative position and then adjust the height of lifting frame 110, unclamps adjustment button 116, two little spring natural extension, the bayonet lock spring natural extension, stretch out spacing hole in the fixed barrel 115 of bayonet lock 118 to make bracing piece 113 fixed in fixed barrel 115. The height of the lifting frame 110 is adjusted through the lifting adjuster, so that the height of the lifting frame 110 can be matched with people with different heights.
The lifting frame 110 is lifted: stimulate the hand lever 140 repeatedly, realize the lifting of lifting frame 110 intermittent type nature, during hand lever 140 anticlockwise rotation, first connecting axle 121 anticlockwise rotation, first gear 123 anticlockwise rotation drives second gear 124 clockwise rotation, second connecting axle 122 is also along with second gear 124 clockwise rotation, and second connecting axle 122 drives first connecting rod 119a clockwise rotation, and first connecting rod 119a is to the state of erectting by the state of putting horizontally, and lifting frame 110 rises, and hand lever 140 is when anticlockwise rotation only, and lifting frame 110 just can the lifting, when hand lever 140 clockwise rotation, because the reason of first one-way bearing 125, can not drive first rotating shaft rotates, so during hand lever 140's clockwise rotation, lifting frame 110 is motionless (do not rise not fall).
If the lifting frame 110 is to be lowered, the hand lever 140 is pulled counterclockwise to rotate the ratchet wheel clockwise, until the first limit pin 134 pushes the ratchet sleeve 133, the ratchet sleeve 133 pushes the pawl 132 away from the tooth slot in the ratchet wheel 131, the ratchet sleeve 133 is clamped between the pawl 132 and the ratchet wheel 131, at this time, the ratchet wheel 131 can rotate counterclockwise and rotate the first link 119a counterclockwise, the lifting frame 110 is lowered, at this time, the second link 122 rotates counterclockwise, the ratchet wheel 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 disposed between the first gear 123 and the first connecting shaft 121, the first connecting shaft 121 does not rotate along with the first gear 123, and therefore, the hand lever 140 is stationary during the descending process of the lifting frame 110.
Example 2:
the hand pulling lifting device 100 is arranged on the armrest frames on the left side and the right side of the chair frame 200, the chair frame 200 is provided with a chair frame back 210, a left armrest frame 220 and a right armrest frame 230; the left armrest frame 220 has a front leg 221 and a second cross member 222; the second cross member 222 connects the upper ends of the seat back 210 and the front leg 221; the left armrest frame 220 is symmetrical to the right armrest frame 230.
The hand-pulling lifting device 100 is fixed on both the left armrest frame 220 and the right armrest frame 230; the first connecting shaft 121 and the second connecting shaft 122 pass through a second beam 222, the gear set 120 and the automatic opening and closing ratchet mechanism 130 are close to the outer side of the second beam 222, the first connecting rod 119a is close to the inner side of the second beam 222, and the second connecting rod 119b is hinged to the second beam 222.
When using the auxiliary rising chair with the hand pulling lifting device 100, the lifting frame 110 is supported under the armpit of people, the left hand and the right hand pull the pull rod simultaneously, the counterclockwise pull rod drives the gear set 120, the gear set 120 drives the lifting frame 110 to rotate, wherein the first connecting rod 119a and the second connecting rod 119b on the lifting frame 110 rotate clockwise.
A first spring is fixed on the outer side of the second beam 222, the lower end of the first spring is fixed on the outer side of the second beam 222, the other end of the first spring is connected with the head of the pawl 132, the pawl 132 is hinged with the outer side of the second beam 222, when the ratchet wheel 131 rotates clockwise, the pawl 132 repeatedly extends into the tooth space of the ratchet wheel 131 and withdraws from the tooth space of the ratchet wheel 131, and the first spring provides power for the pawl 132 to extend into the tooth space of the ratchet wheel 131.
Chair back 210 is equipped with two second springs 211, chair back 210 passes through two second springs 211 link to each other with two hand lever 140 respectively, second spring 211 can restrict hand lever 140 clockwise turning's scope, and when people stimulate hand lever 140 excessively carelessly, hand lever 140 can provide certain holding power for people, avoids people to fall down.
The front end of the second beam 222 is provided with a limit block 223, the limit block 223 is used as a rotation limit of the second connecting rod 119b, the limit block 223 is provided with a damping spring, the position of the limit block 223 is a limit position of the second connecting rod 119b rotating clockwise, the damping spring on the limit block 223 plays a role in buffering, the second connecting rod 119b is prevented from directly striking the limit block 223, and discomfort of hard landing is avoided.
The telescopic synchronous rod 300, the fixed respectively with two of synchronous rod 300 the upper end fixed connection of lifting frame 110 can adjust two through synchronous rod 300 the distance of the upper end of lifting frame 110, lets left side and right side lifting frame 110 can both support in people's armpit as far as possible.
A partition is provided on the inner side of the second beam 222, and the partition serves as a limit for counterclockwise rotation of the first link 119a and the second link 119 b.
In this embodiment, after the human body stands stably, when the lifting frame 140 is pulled until the second connecting rod 119b contacts the limiting block 223, the ratchet sleeve 133 rotates to just contact with the pawl 132 under the action of the first limiting pin 134, the pawl 132 presses the ratchet sleeve 133 under the pulling of the small spring, the ratchet wheel 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 (to be contacted with the shelf), the second limit pin 135 just pulls the ratchet sleeve 133 downwards until the first link 119a and the second link 119b are completely contacted with the shelf, and the ratchet 131 and the pawl 132 are just contacted again.
The lower side of the assisted rising chair with the hand-pulled lifting device can be provided with a toilet 400, wherein the toilet 400 comprises a backrest 410 and a toilet seat 420; the toilet 400 is disposed under the chair frame 200, and the toilet 400 is disposed under the chair frame 200, so that a person with mobility difficulty can go to the toilet conveniently, and the person with mobility difficulty can get up by using the auxiliary chair with the hand-pulling lifting device 100.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (6)
1. A hand power lifting device, comprising:
the gear set is connected with a hand lever, the hand lever is used for driving the gear set, 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 one-way bearing, the first one-way bearing is sleeved on the first connecting shaft and is fixedly connected with the hand lever, the second one-way bearing is arranged between the first connecting shaft and the first gear, and the first gear is meshed with the second gear;
the lifting frame is connected with the gear set, the rotating gear set drives the lifting frame to ascend or descend, the lifting frame is provided with a handle, the handle is fixed at the upper end of the lifting frame, the lower end of the lifting frame is provided with a first cross beam, the rear end of the first cross beam is hinged with a first connecting rod, the front end of the first cross beam is hinged with a second connecting rod, and the first connecting rod is fixed on a second connecting shaft;
the lifting frame is also provided with two support rods, a lapping rod and two fixing cylinders, the lapping rod is connected with the two support rods, the two fixing cylinders are fixed on the side body of the first cross beam, the lower ends of the support rods extend into the fixing cylinders, the lapping rod is positioned above the fixing cylinders, the fixing cylinders are provided with a plurality of limiting holes, and the limiting holes are vertically arranged in a row;
the lifting frame is also internally provided with a lifting regulator, and the lifting regulator is provided with an adjusting button, an iron wire and a bayonet lock; the iron wire extends into one support rod, passes through the lapping rod and penetrates out of the other support rod, two ends of the iron wire are fixedly connected with the clamping pins, and the clamping pins penetrate through the limiting holes; the adjusting button is provided with an ejector rod, the ejector rod is fixed on the iron wire, two ends of the iron wire are sleeved with bayonet lock springs, one ends of the bayonet lock springs abut against the bayonet locks, the other ends of the bayonet lock springs abut against the supporting rod, and the bayonet lock springs are sleeved with anti-twisting sleeves to prevent the bayonet lock springs from being bent;
the automatic opening and closing ratchet mechanism is connected with the gear set and is provided with a ratchet wheel, a pawl and an automatic opening and closing assembly, the automatic opening and closing assembly is provided with a ratchet wheel sleeve sleeved on the ratchet wheel, a first limit pin and a second limit pin, the first limit pin and the second limit pin are arranged on the end face of the ratchet wheel, the ratchet wheel sleeve is in a fan shape, when the ratchet wheel rotating clockwise exceeds a first preset rotating range, the first limit pin pushes the ratchet wheel sleeve, and the ratchet wheel sleeve pushes the pawl to enable the pawl to be separated from the ratchet wheel; when the ratchet wheel rotating anticlockwise exceeds a second preset rotating range, the second limiting pin pushes the ratchet wheel sleeve, and the pawl resets and is meshed with the ratchet wheel;
when the ratchet wheel rotates clockwise and exceeds a first preset rotation range, the automatic opening and closing assembly enables the ratchet wheel and the pawl to be separated; when the ratchet wheel rotates anticlockwise and the ratchet wheel exceeds a second preset rotation range, the automatic opening and closing assembly enables the ratchet wheel to be meshed with the pawl.
2. An assisted rising chair with a hand-pulled lifting device, comprising: the chair frame is provided with a chair frame back part, a left armrest frame and a right armrest frame, and the left armrest frame is provided with a front support leg and a second cross beam; the second cross beam is connected with the back of the chair frame and the upper end of the front supporting leg; the left armrest frame is symmetrical to the right armrest frame;
the hand-pulling lifting device according to claim 1 is fixed on each of the left armrest frame and the right armrest frame; the first connecting shaft and the second connecting shaft penetrate through a second cross beam, the gear set and the automatic opening and closing ratchet mechanism are close to the outer side of the second cross beam, the first connecting rod is close to the inner side of the second cross beam, and the second connecting rod is hinged to the second cross beam.
3. The chair of claim 2, wherein the lifting device comprises: the first spring is fixed to the outer side of the second cross beam at one end, and the other end of the first spring is connected with the pawl.
4. The chair of claim 2, wherein the lift assist comprises: the chair frame back is equipped with two second springs, the chair frame back pass through two second springs link to each other with two hand lever respectively.
5. The chair of claim 2, wherein the lifting device comprises: the lifting frame is characterized by further comprising a telescopic synchronizing rod, and the synchronizing rod is fixedly connected with the upper ends of the two lifting frames respectively.
6. The chair of claim 2, wherein the lifting device comprises: the front end of the second cross beam is provided with a limiting block which is used as a rotation limit of the second connecting rod;
and a partition plate is arranged on the inner side of the second cross beam and used as a limit for the counterclockwise rotation of the first connecting rod and the second connecting rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710508801.2A CN107334591B (en) | 2017-06-28 | 2017-06-28 | Auxiliary rising chair with hand-pulling lifting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710508801.2A CN107334591B (en) | 2017-06-28 | 2017-06-28 | Auxiliary rising chair with hand-pulling lifting device |
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| CN107334591A CN107334591A (en) | 2017-11-10 |
| CN107334591B true CN107334591B (en) | 2022-07-26 |
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|---|---|---|---|---|
| CN107753198A (en) * | 2017-11-13 | 2018-03-06 | 长沙宁湖机械设备有限公司 | A kind of aiding upright device |
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| CN107647988B (en) * | 2017-11-13 | 2020-03-24 | 陈士香 | Auxiliary standing device |
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| CN111658379B (en) * | 2020-05-12 | 2021-05-11 | 武汉理工大学 | Help old subassembly of standing and collapsible domestic help old device of standing |
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