CN112425946A

CN112425946A - Seat with adjustable body position height

Info

Publication number: CN112425946A
Application number: CN202011584501.0A
Authority: CN
Inventors: 张争艳; 吴俊雄; 黎萧琪; 魏振伟; 马一夫; 高佳梦; 刘海涛
Original assignee: Hebei University of Technology
Current assignee: Hebei University of Technology
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-03-02

Abstract

The invention relates to a seat with an adjustable body position height, which comprises a seat lifting device, an armrest adjusting device, a back adjusting device, a head adjusting device and a moving device, wherein the seat lifting device is arranged on the back of the seat lifting device; the seat lifting device is arranged at the middle lower part of the seat and is responsible for lifting the whole seat; the armrest adjusting device is arranged above the seat and provides convenience for the seat; the back adjusting device is arranged below the seat and is used for adjusting the angle of the seat back plate; the head adjusting device is arranged at the uppermost part of the seat and is used for controlling the adjustment of the angle of the headrest; the moving device is arranged at the lowest part of the seat and used for moving the seat. The chair realizes the lifting of the chair through an ingenious mechanism, and can be flush with the ground when being reduced to the lowest degree so as to adapt to special working occasions such as automobile repair and the like. And the seat realizes the automatic change of the armrests and the automatic lifting of the headrest through linkage. The posture conversion is realized by only using two electric push rods, and the power source is less.

Description

Seat with adjustable body position height

Technical Field

The invention relates to the field of seats, in particular to a seat with an adjustable body position and height.

Background

With the continuous improvement of the automobile holding capacity in China's society, the requirements of people on automobile maintenance are also increased, and correspondingly more and more people are added to the automobile repair industry. The automobile repair worker needs to frequently go in and out of the bottom of the automobile when repairing the automobile, needs to continuously switch between a lying posture and a sitting posture, and whether the automobile repair worker can easily go in and out of the bottom of the automobile to operate becomes a big problem. The main tool for the automobile maintenance worker to go in and out of the bottom of the automobile in China is researched and developed to be a lying plate, namely a simple plate with wheels. When the tool is used for entering the vehicle bottom for operation, even the back of the tool is required to be separated from the lying plate for maintenance, and the vehicle bottom entering and exiting needs to be separated from the lying plate once, so that the tool is very labor-consuming and is not humanized. Not only the automobile repair factory, but also a seat with adjustable body position and height is needed in many other fields such as medical treatment, nursing and the like.

A portable lying and repairing plate for automobile repair is designed by a mark of Huizhou engineering profession college, and the folding of a lying and repairing chair and the adjustment of the angle of a headrest can be realized; the lying and repairing plate lacks the adjustment of the back angle, only has lying posture without sitting posture, and has single function.

Disclosure of Invention

Aiming at the existing problems, the invention aims to solve the technical problem of providing a chair with adjustable body position height.

The technical scheme for solving the technical problems is as follows:

a chair with adjustable body position and height comprises a chair lifting device, an armrest adjusting device, a back adjusting device, a head adjusting device and a moving device; the chair is characterized in that the seat lifting device is positioned at the middle lower part of the armrest adjusting device; the moving device is arranged at the bottommost part of the seat lifting device and is used for moving the seat; the back adjusting device is positioned above the seat lifting device and behind the armrest adjusting device and is used for adjusting the back angle; the head adjusting device is positioned above the back adjusting device and is used for supporting the head of a person;

the seat lifting device comprises a long seat frame, a short seat frame, a first connecting rod, a second connecting rod, a sliding rod, a lifting sliding rail, a left electric push rod, a right electric push rod and the like;

the armrest adjusting device comprises a hand supporting plate, a cushion plate, an arm supporting plate, a tool box containing plate and the like;

the back adjusting device comprises a back plate, a rocking block positioning shaft, a rocking block translation rod, a clamping pin fixing plate, a rocking block, a clamping pin, a rocking block sealing cover and the like;

the head adjusting device comprises a headrest, a push rod, a manual adjusting rod, a linkage push rod, a manual release rod and the like;

the long seat frame is fixedly connected with the middle of the short seat frame to form a scissor type structure capable of rotating by an angle, the upper end of the short seat frame is fixedly connected with the bottom of the cushion plate, a lifting slide rail is fixed at the bottom of the cushion plate, a first connecting rod and a second connecting rod are connected at positions on the upper side of the fixedly connected long seat frame and the short seat frame, and the slide rod fixedly connected with the upper end of the first connecting rod and the upper end of the second connecting rod can slide in the lifting slide rail. The rear part of the back plate is fixedly connected with the rocking block positioning shaft, the tail end of the bayonet lock fixing plate is fixedly connected with the long seat frame, the rear part of the bayonet lock fixing plate is fixedly connected with the rocking block translation rod, and a hole site at the upper end of the rocking block is inserted into the rocking block positioning shaft and a hole site at the lower end of the rocking block is inserted into the rocking block translation rod, so that the rocking block can rotate around the rocking block translation rod and translate along the rocking block translation rod. Two liang of links firmly mutually of backplate top rear portion, push rod, manual release lever, push rod top links firmly mutually with manual regulation pole, and the backplate top links firmly mutually with the headrest.

Compared with the prior art, the invention has the beneficial effects that:

(1) the two electric push rods are used as power sources, the conversion between the sitting posture and the ground-attaching lying posture is realized by utilizing the mutual matching of the components of the seat lifting device and the back adjusting device, and different requirements of various conditions when the automobile enters or exits from the bottom of the automobile can be met; the linkage and manpower between each part are fully utilized, the power source is reduced, the structure is simple, and the cost is saved.

(2) The invention mainly realizes the transformation between postures by mechanical limit, namely the bayonet lock fixing plate and the bayonet lock can limit the angle and the position of the movable block to realize back adjustment, and the cushion plate, the parallelogram mechanism, the long seat frame and the short seat frame integrally form a mechanism combining a parallelogram and a similar triangle, thereby realizing that the cushion plate is always horizontal to the ground.

Drawings

FIG. 1 is a schematic structural diagram of a sitting position according to an embodiment of the present invention;

FIG. 2 is a schematic view of an overall structure of an angle according to an embodiment of the present invention;

FIG. 3 is a schematic view of another embodiment of the present invention;

FIG. 4 is a bottom schematic view of a cushion plate according to an embodiment of the present invention;

figure 5 is an overall schematic view of a back adjustment device according to an embodiment of the invention;

FIG. 6 is a schematic view of a rocker mounting according to one embodiment of the invention;

FIG. 7 is an overall schematic view of a headrest adjustment according to an embodiment of the invention;

FIG. 8 is a schematic view of the installation of a seat whistle of one embodiment of the present invention;

FIG. 9 is a schematic view of an embodiment of the present invention in a fully recumbent position;

FIG. 10 is a schematic view of a back raised in a recumbent position in accordance with an embodiment of the present invention;

in the figure: 1. seat lifting device-short seat frame; 2. armrest adjusting devices-arm rest plates; 3. back adjustment device-back plate; 4. head adjusting device-headrest; 5. mobile device-wheel-carrying plate;

1-1, a bench seat frame; 1-2, a first connecting rod; 1-3, connecting rod positioning shaft; 1-4, an electric push rod; 1-5, positioning a shaft by an electric push rod; 1-6, a second connecting rod; 1-7, a short seat frame fixing seat; 1-8, a slide bar; 1-9, lifting slide rails; 1-10, a frame fixed connecting shaft;

2-1, a cushion plate; 2-2, a handrail connecting rod; 2-3, supporting arm plates;

3-1, fixing a bayonet fixing plate; 3-2, rocking block positioning shaft; 3-3, a rocking block; 3-4, an anti-falling cover; 3-5, a clamping pin; 3-6, a positioning seat of the rocking block translation rod; 3-7, a rocker translation rod; 3-8, positioning seats of the rocker positioning shafts; 3-9, an inner rod of a bayonet pin; 3-10, a bayonet return spring;

4-1, manually releasing the lever cap; 4-2, a push rod; 4-3, manually adjusting a rod; 4-4, manually releasing the thin shaft of the rod; 4-5, manually releasing the thick shaft of the lever; 4-6, a lock whistle base; 4-7, a lock whistle; 4-8, a lock whistle fixing shaft; 4-9, a lock whistle return spring; 4-10, a headrest positioning seat; 4-11, a linkage shaft positioning seat; 4-12 and a linkage shaft.

5-1, a wheel carrying plate positioning shaft; 5-2, universal wheels;

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings. The specific examples are only intended to illustrate the invention in further detail and do not limit the scope of protection of the claims of the present application.

The invention provides a seat (seat for short) with an adjustable body position height, which is characterized by comprising a seat lifting device 1; 2. an armrest adjustment device; 3. a back adjustment device; 4. a head adjusting device; 5. a mobile device;

the seat lifting device 1 is used for supporting the main body of the seat, and simultaneously realizes the most important function of the seat, namely lifting of the seat. The middle parts of the short seat frame 1 and the long seat frame 1-1 are fixedly connected through a frame fixing shaft 1-10 to form a scissor type mechanism, the bottom of the long seat frame 1-1 is connected with an electric push rod fixing shaft 1-5, two electric push rods 1-4 are placed on the electric push rod fixing shaft 1-5, the upper ends of the electric push rods 1-4 are connected with the short seat frame, and the scissor type mechanism is opened and closed through stretching and shrinking of the electric push rods 1-4, so that the seat is lifted.

The upper part of the middle of the long seat frame 1-1 is fixedly connected with a connecting rod positioning shaft 1-3, the upper part of the connecting rod positioning shaft 1-3 is connected with the lower end of a first connecting rod 1-2, and the lower end of a second connecting rod 1-6 is connected with the upper part of the short seat frame 1. The upper ends of the first connecting rod 1-2 and the second connecting rod 1-6 are connected through a sliding rod 1-8, and the sliding rod 1-8 can move back and forth on a lifting sliding rail 1-9. The triangle formed by the second connecting rod 1-6 and the short seat frame 1 is similar to the triangle at the lower end of the scissor type mechanism to ensure that the cushion plate 2-1 is always parallel to the ground. The parallelogram mechanism formed by the long seat frame 1-1, the short seat frame 1, the second connecting rod 1-6 and the first connecting rod 1-2 is used for shortening the length of the lifting slide rail 1-9 to ensure that the lifting slide rail is arranged at the lower end of the cushion plate, thereby ensuring that the gravity center of the whole seat can be stable no matter what state the whole seat is.

The main component of the armrest adjusting device 2 is a cushion plate 2-1, four armrest connecting rods 2-4 are fixed on two sides of the cushion plate 2-1 through four screws, a hand supporting plate 2 is fixed at the upper ends of every two armrest connecting rods 2-4 through screws, a part of hollowed stroke is arranged in the middle of the hand supporting plate 2, and the stroke is mutually meshed with bulges on two sides of a back plate 3, so that the hand supporting plate 2 is lowered when the back plate 3 lies down, and the hand supporting plate 2 is raised when the back plate 3 rises. The arm supporting plate 2-3 is fixedly connected with two sides of the middle part of the back plate 3 through bolts, and the tail part of the arm supporting plate 2 and the front end arm supporting part form a certain angle, so that the arm supporting plate 2-3 can be supported. The effect that is finally achieved is that when the seat is lifted, the arm rest board 2 is lifted to support the small arm and the hand (as shown in figure 1), and when the seat is laid on the ground to enter the large machine or the bottom of the vehicle for working, the arm rest board 2-3 is lifted to support the large arm for saving labor (as shown in figures 9 and 10).

The back adjusting device 3 is responsible for adjusting the angle of the back plate 3. The bottom of the bayonet fixing plate 3-1 is fixedly connected with the bench seat frame 1-1, and the bayonet fixing plate can rotate relative to the bench seat frame 1-1. Two rocking block translation rod positioning seats 3-1 are fixed on the inner side of the bayonet pin fixing plate 3-1 and used for fixing the rocking block translation rods 3-7. Two rocking block positioning shaft positioning seats 3-8 are fixed at the upper part of the back plate 3 and are used for fixing the rocking block positioning shafts 3-2. A blind hole is arranged at the rear upper part of the rocking block 3-3, and the rocking block positioning shaft 3-2 is inserted into the blind hole, so that the relative position of the rocking block and the back plate is fixed. A through hole is formed in the middle of the rocking block 3-3, the rocking block translation rod 3-7 penetrates through the through hole, the rocking block 3-3 can translate on the rocking block translation rod 3-7, and meanwhile the rocking block can rotate along with the bayonet fixing plate 3-1 and keeps relatively parallel. The inner part of the front end of the rocking block 3-3 is provided with a blind hole with a special stroke, the blind hole enables the inner rod 3-9 of the bayonet lock to move back and forth before reaching the end, and the inner rod 3-9 of the bayonet lock can rotate to lock when reaching the end. The top end of the inner rod 3-9 of the bayonet lock is fixedly connected with the bayonet lock 3-5, and the bayonet lock 3-5 is used for realizing the function of fixing the back plate at 3-angle by being clamped in the hole on the bayonet lock fixing plate 3-1. An anti-falling cover 3-4 is fixed at the front end of the rocking block 3-3, a bayonet return spring is arranged between the anti-falling cover 3-3 and the bayonet inner rod 3-9, and the spring has the function of actively clamping the bayonet 3-5 in a hole on the bayonet fixing plate 3-1 when the hand is released.

There are two modes of back adjustment, one driven and one fixed.

Driven mode: when the seat is in a sitting state (as shown in fig. 1), the bayonet pins 3-5 are pulled to the head and rotated to enable the seat to be in a driven mode, in the driven mode, the back plate 3 can be pressed on the bench seat frame 1-1 only by lightly pressing the back when the seat descends, at the moment, the seat is lifted, and the back plate 3 can also descend until the seat completely lies flat (as shown in fig. 9). When the chair is fully reclined, the back is slightly raised and the back plate 3 is also raised. When raised to the desired angle, backing plate 3 is locked by restoring pins 3-5 (as shown in FIG. 10). Note: the seat must be in this mode when raised.

A fixed mode: the effect of this mode is that the angle of the back plate 3 remains unchanged when the seat is raised and lowered. The fixed connection position of the tail part of the bayonet fixing plate 3-1 is right behind the cushion plate 2-1, the position is right behind the cushion plate 2-1 no matter the angle of the seat, and the position is the premise that the angle of the back plate 3 is not changed. When the seat is raised, the bayonet 3 is in the normal state and the seat is in the secured mode.

The head restraint 4 functions to control the adjustment of the head restraint 4 so that the head restraint 4 can be laid down without obstructing the view of a person when the seat is being made, and the head restraint 4 can be raised to support the head when the seat is lying down. The upper part of the back of the backboard 3 is fixedly connected with a rotatable push head rod 4-2, the lower part of the upper end of the long seat frame 1-1 is provided with two linkage shaft fixedly connected seats 4-11, a linkage shaft 4-12 is fixedly connected between the linkage shaft fixedly connected seats 4-11, and when the seat descends, the linkage shaft 4-12 can push the push head rod 4-2 to lift the headrest 4. The manual release lever is composed of three parts, namely a manual release lever cap 4-1, a manual release lever thin shaft 4-4 and a manual release lever thick shaft 4-5. Two lock whistle bases 4-6 are arranged at the back upper part of the back plate 3, the lock whistle 4-7 is connected with the lock whistle fixing shaft 4-11 through the lock whistle bases 4-6, and a lock whistle return spring 4-9 ensures that the spring always springs upwards (as shown in figure 8). An incomplete gear is arranged on the thin shaft 4-4 of the manual release lever, and when the headrest 4 is lifted to a certain angle, the gear is meshed with the lock whistle 4-7 to fix the headrest 4. The upper end of the push rod 4-2 is fixedly connected with the manual adjusting rod 4-3, and the headrest 4 can be adjusted to a comfortable angle by pulling the manual adjusting rod 4-3. When the headrest 4 is put down, the lever cap 4-1 of the release lever of the headrest is pressed inwards, the gear is disengaged from the whistle 4-7 of the lock head, and the headrest can fall down.

The moving device 5 is composed of three wheel bearing plates 5, and each wheel bearing plate 5 is fixed with two universal wheels 5-2. The front wheel carrying plate 5 is directly connected with the lower end of the long seat frame 1-1, and the rear wheel carrying plates 5 are connected with the lowest end of the short seat frame 1 through wheel carrying plate positioning shafts 5-1.

Claims

1. A chair with adjustable body position and height comprises a chair lifting device, an armrest adjusting device, a back adjusting device, a head adjusting device and a moving device;

the chair is characterized in that the seat lifting device is positioned at the middle lower part of the armrest adjusting device, the moving device is arranged at the bottommost part of the seat lifting device, the back adjusting device is positioned above the seat lifting device and behind the armrest adjusting device, and the head adjusting device is positioned above the back adjusting device;

the seat lifting device comprises a short seat frame, a long seat frame, a first connecting rod, a connecting rod positioning shaft, an electric push rod positioning shaft, a second connecting rod, a short seat frame fixing seat, a sliding rod, a lifting sliding rail and a frame fixing and connecting shaft;

in the seat lifting device, the middle parts of a long seat frame and a short seat frame are hinged through a frame fixing shaft to form a scissor-fork type structure capable of rotating an angle, and the upper end of the short seat frame is fixedly connected with the bottom of a cushion plate; a lifting slide rail is fixed at the bottom of the cushion plate, a connecting rod positioning shaft is fixedly connected to the upper part of the middle of the long seat frame, the connecting rod positioning shaft is connected with the lower end of a first connecting rod, the lower end of a second connecting rod is connected with the upper part of the short seat frame, the upper ends of the first connecting rod and the second connecting rod are connected through a slide rod, and the slide rod is inserted into the lifting slide rail and can slide in the lifting slide rail; the bottom of the long seat frame is connected with an electric push rod fixing shaft, an electric push rod is fixedly connected to the electric push rod fixing shaft, and the upper end of the electric push rod is connected with the short seat frame;

the back adjusting device comprises a back plate, a clamping pin fixing plate, a rocking block positioning shaft, a rocking block, an anti-falling cover, a clamping pin, a rocking block translation rod positioning seat, a rocking block translation rod, a rocking block positioning shaft positioning seat, a clamping pin inner rod and a clamping pin reset spring;

in the back adjusting device, the bottom of a clamping pin fixing plate is hinged with a bench seat frame, two rocking block translation rod positioning seats are fixed on the inner side of the clamping pin fixing plate and are used for fixing the rocking block translation rods, two rocking block positioning shaft positioning seat fixing rocking block positioning shafts are fixed on the middle part of a back plate, a blind hole is formed in the rear upper part of a rocking block, the rocking block positioning shaft is inserted into the blind hole, a through hole is formed in the middle of the rocking block, the rocking block translation rod penetrates through the through hole, a blind hole with a special stroke is formed in the front end of the rocking block, a clamping pin inner rod is inserted into the blind hole, the top end of the clamping pin inner rod is fixedly connected with a clamping pin, the clamping pin is clamped in a hole in the clamping pin fixing plate, an anti-;

the handrail adjusting device comprises a cushion plate, a handrail connecting rod, a hand supporting plate and an arm supporting plate;

in the armrest adjusting device, two sides of the seat cushion plate are connected with four armrest connecting rods through four screws, the upper ends of every two armrest connecting rods are fixed with a hand supporting plate through screws, the middle part of the hand supporting plate is provided with a part of hollowed stroke, the stroke is mutually occluded with bulges at two sides of the back plate, the arm supporting plate is fixedly connected with two sides of the middle part of the back plate through bolts, and the tail part of the hand supporting plate is contacted with the hand supporting part at the front end at a certain angle;

the headrest adjusting device comprises a headrest, a manual release lever cap, a push lever, a manual adjusting lever, a manual release lever thin shaft, a manual release lever thick shaft, a lock whistle base, a lock whistle fixing shaft, a lock whistle reset spring, a headrest positioning seat, a linkage shaft positioning seat and a linkage shaft;

in the head adjusting device, a push head rod is hinged with a back plate, two linkage shaft fixedly-connected seats are fixed at the lower part of the upper end of a long seat frame, a linkage shaft is fixedly connected between the linkage shaft fixedly-connected seats, a manual release rod consists of three parts, namely a manual release rod cap, a manual release rod thin shaft and a manual release rod thick shaft, two lock head whistle bases are arranged above the back plate, lock head whistles are connected through the lock head whistle bases and the lock head whistle fixed shafts, gears are arranged on the manual release rod thin shafts and can be occluded with the lock head whistles, and the upper end of the push head rod is fixedly connected with the manual adjustment rod;

the moving device comprises a wheel carrying plate, a wheel carrying plate fixing shaft and a universal wheel; the universal wheel is fixed on the surface of the wheel-carrying plate, the front end of the long seat frame is hinged with the wheel-carrying plate, the tail end of the short seat frame is hinged with the wheel-carrying plate fixing shaft, and two ends of the wheel-carrying plate fixing shaft are respectively fixed with the wheel-carrying plate.

2. The adjustable chair of claim 1 wherein the rockers are provided with blind holes of specific internal stroke to allow the pin to rotate only when pulled to the end and to lock after rotation.

3. The adjustable body position height seat according to claim 1, wherein two universal wheels are fixed to each wheel carrying plate.

4. A posture height adjustable chair as claimed in claim 1 wherein the gear on the thin shaft of the manual release lever is an incomplete gear, with the geared portion corresponding to the angle at which the headrest is adapted to support the head and the non-geared portion corresponding to the other angle.

5. The adjustable chair of claim 1 wherein the cushion plate has a tool placement location at each end.

6. The adjustable chair for body position and height according to claim 1, wherein a return spring is arranged between the whistle part of the fixed lock head, the hinged part of the cushion plate and the back plate, and the thick rod of the manual release lever and the thin rod of the manual release lever.