CN114948574B - Ophthalmic chair - Google Patents

Abstract

The invention relates to the field of medical auxiliary apparatuses and discloses an ophthalmic chair, which comprises a seat board, a backrest, a pair of supporting legs and a pair of armrests, wherein the backrest is an angle-adjustable backrest between the backrest and the seat board; the support legs are positioned below two sides of the seat board, the support legs comprise front support legs and rear support legs, the rear support legs extend to the rear part of the seat board, the front support legs extend to the front part of the seat board, the armrest comprises an armrest body, and front support legs and rear support legs connected with the armrest body, the front support legs and the rear support legs are positioned between the front support legs and the rear support legs, and the front support legs, the rear support legs, the front support legs and the rear support legs are all in contact with the ground; the armrest body is obliquely arranged. According to the ophthalmic chair, when a patient lies down or gets up through the optimization of the armrests, the force is easier to be exerted, and meanwhile, the center of the chair is moved forward to the lower part of the seat plate through the optimization of the armrests, so that the use safety is improved.

Description

Ophthalmic chair

Technical Field

The invention relates to the field of medical auxiliary instruments, in particular to an ophthalmic chair.

Background

Ophthalmic technical operation is one of the important means of eye disease treatment, and many patients who carry out eye disease treatment at the hospital ophthalmic clinic have different ages and different body types. The common clinical treatment operation is eye irrigation, eye channel irrigation, eye dressing change, etc. When the treatment is carried out, a patient is generally seated on a treatment chair, and the head is reclined against the headrest for treatment, and the method has the defects that: 1. in order to facilitate the operation of nurses, the patient cushion is lower, the old does not have armrests when sitting down, and the nurses are required to sit down or rise up, so that the operation is inconvenient. 2. When the patient carries out the eye and washes, current ophthalmology chair only has set up the head bracket, and support and fixed action to the patient are not enough, can't control the upper and lower regulation, and the nurse of being inconvenient for operates the best direction of patient's head. 3. When the patient washes eyes with medicine, the cup stand is needed, the cup stand of the existing treatment chair can not be clung to the face, eye drops can not flow into the cup stand or the cup stand fixing frame can not be adjusted according to the body shape of the patient. 4. The prior ophthalmic chair can not provide comfortable experience for patients, and the waist of the patients can not be clung to the backrest and is in a suspended state, or when the backrest is adjusted, the armrests are also adjusted together, the armrests in a semi-lying state are not supported, and when the patients are treated for a long time, the patients often feel soreness and tiredness of the waist, and the patients have no sense of security.

The following cases can be seen in particular:

CN201520962750.7 (D1) discloses an ophthalmologic integrated treatment chair, comprising a chair surface, chair legs and a backrest, wherein the chair legs comprise a left chair leg and a right chair leg which are connected through a cross beam, the chair surface is arranged on the cross beam between the chair legs at two sides, the backrest is hinged on the rear legs at two sides, the backrest comprises a back pad, a support frame for supporting the back pad, an adjusting mechanism for adjusting the inclination of the backrest on the hinged support frame, a rocker arm which is arranged at the side edge of the support frame and has a lifting function, a water receiving device arranged on the rocker arm, and a head rest which is arranged on the support frame and is used for supporting the head; the cross beam below the chair seat is provided with a bracket, and the bracket is provided with a water collecting device which is connected with the water receiving device through a conduit.

CN202123364141.6 (D2) discloses a multifunctional reclining chair for ophthalmic examination, which belongs to the technical field of ophthalmic examination, and comprises a reclining chair; the stabilizing mechanism comprises fixing blocks, screw nuts, screw rods, hollow blocks, limiting rods and second hollow grooves, wherein the fixing blocks, the screw nuts and the second hollow grooves are all arranged in two, the two fixing blocks are fixedly connected to one end of the deck chair, and the screw rods are rotatably connected to the adjacent ends of the two fixing blocks.

CN201720075730.7 (D3) discloses an operation chair for washing conjunctival sac, comprising a conjunctival sac washing chair with adjustable backrest angle, a head support and chair legs, wherein the left side and the right side of a chair seat plate of the conjunctival sac washing chair are provided with fixing seats, the middle part of a washing liquid container hanging rod is provided with a water receiver supporting frame, one end of the water receiver supporting frame is provided with a water receiver supporting frame shaft sleeve matched with the washing liquid container hanging rod, the other end of the water receiver supporting frame is provided with a water receiver fixing ring, a telescopic rod is arranged between the water receiver fixing ring and the water receiver supporting frame shaft sleeve, a limiting step for limiting the water receiver supporting frame shaft sleeve is arranged on the washing liquid container hanging rod, an adjustable backrest supporting rod is arranged between the backrest and the rear chair legs of the four chair legs, the lower end of the backrest is hinged with the hinged support on the rear chair legs, and the upper end of the adjustable backrest supporting rod is hinged with the hinged support on the back of the backrest.

Among the above-mentioned D1-D3, there are common problems in that: when part of people such as the old lie down or get up, the existing chair can not provide good stress support, and when standing up, the gravity center of the chair is easy to overturn and bring about potential safety hazards.

The technical problems to be solved by the invention are as follows: how to improve the stability of the prior ophthalmic chair, how to make the ophthalmic chair more beneficial to the use of special people, and improve the use safety.

Disclosure of Invention

The main object of the invention is to provide an ophthalmic chair which is easier to exert force when a patient lies down or gets up by optimizing armrests, and simultaneously, the center of the chair is moved forward to the position below a seat plate by optimizing armrests, so that the use safety is improved.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows:

an ophthalmic chair comprises a seat plate, a backrest, a pair of supporting legs and a pair of armrests, wherein the backrest is an angle-adjustable backrest between the backrest and the seat plate; the support legs are positioned below two sides of the seat board, the support legs comprise front support legs and rear support legs, the rear support legs extend to the rear part of the seat board, the front support legs extend to the front part of the seat board, the armrest comprises an armrest body, and front support legs and rear support legs connected with the armrest body, the front support legs and the rear support legs are positioned between the front support legs and the rear support legs, and the front support legs, the rear support legs, the front support legs and the rear support legs are all in contact with the ground; the armrest body is obliquely arranged, and the height of one side of the armrest body close to the backrest is lower than that of one side of the armrest body away from the backrest; the front support leg is fixedly connected with the front support leg, and the rear support leg is fixedly connected with the rear support leg.

In the above-mentioned ophthalmologic chair, the armrest body includes the U-shaped section of armrest body, opening towards the back, the back stabilizer blade is connected at the one end of armrest body, preceding stabilizer blade is connected at the one end of U-shaped section, the other end of U-shaped section and the other end connection of armrest body.

In the ophthalmic chair, the included angle between the armrest body and the horizontal plane is 15-25 degrees, and the U-shaped section extends to the front of the seat plate.

In the above-mentioned ophthalmic chair, the seat plate comprises a seat plate body and a seat plate supporting frame fixedly connected with the seat plate body, and the seat plate supporting frame is fixedly connected with the front support leg and/or the rear support leg; the landing leg further comprises a connecting rod for connecting the front landing leg and the rear landing leg, the landing leg is of a U-shaped structure with a downward opening, and the seat plate supporting frame is fixedly connected with the connecting rod.

In the ophthalmic chair, a headrest, a C-shaped connecting piece and a lifting mechanism are connected to the backrest; the headrest is hinged with one end of the C-shaped connecting piece in a lockable manner, and the other end of the C-shaped connecting piece is hinged with the lifting mechanism in a lockable manner;

when the lifting mechanism descends to the lowest position, the top of the backrest enters the C-shaped connecting piece from the opening of the C-shaped connecting piece.

The ophthalmology chair further comprises a water receiving unit, wherein the water receiving unit comprises a water receiver, a water receiver support and a support fixer, the water receiver support is a support which rotates universally, the support fixer is hinged with one end of the water receiver support, the water receiver support can move and position between the left side and the right side of the backrest around the support fixer, and the support fixer is fixed on the C-shaped connecting piece; the water receiver bracket is connected with an elastic piece, and the elastic piece is used for pulling the water receiver bracket towards the headrest direction.

The ophthalmic chair further comprises a connecting plate, wherein one end of the connecting plate is hinged with the C-shaped connecting piece in a fixable mode, and the other end of the connecting plate is hinged with the end part of the water receiver bracket in a fixable mode; the elastic piece is an elastic piece with adjustable pulling force, and the back of the headrest is provided with a holding part for adjusting the position of the headrest by a person.

In the above-mentioned ophthalmologic chair, the water receiver support includes a first rod body, a second rod body, a plate body, and a frame body, wherein one end of the first rod body is hinged with the connecting plate, the first rod body is connected with the second rod body through a lockable ball joint connecting piece, the plate body is fixedly connected with the end of the second rod body, a bar-shaped hole is arranged on the plate body, and the frame body is fixed on the bar-shaped hole in a position-adjustable manner; the water receiver is fixed in the frame body, one end of the elastic piece is connected with the second rod body, and the other end of the elastic piece is connected with the headrest.

In the above-mentioned ophthalmology chair, the support body is including being used for holding cup support, torsional spring, the base of water receiver, cup support, torsional spring are fixed on the base, the base passes through the bolt fastening on the bar hole, the water receiver is the contact side with one side of human face, the power end of torsional spring is fixed connection with the water receiver for one side of contact side.

In the ophthalmic chair, the armrests are provided with soft cushions; a cross rod is arranged between the two rear supporting legs, an air cylinder, an oil cylinder or an electric cylinder is hinged on the cross rod, and the power output end of the air cylinder, the oil cylinder or the electric cylinder is hinged with the back of the backrest; the cross rod extends to a position between the rear supporting leg and the rear supporting leg, and the hinging position of the air cylinder is positioned between the rear supporting leg and the rear supporting leg; it should be noted that: the electric cylinder can be an electric push rod.

A backrest bracket is fixed on the back of the backrest;

the bottoms of the front support leg, the rear support leg, the front support leg and the rear support leg are respectively provided with a leveling anti-skid foot pad.

The scheme has at least one of the following advantages or beneficial effects:

according to the scheme, the supporting legs of the armrests extend between the front supporting legs and the rear supporting legs, when a patient lies down or gets up, the armrests are retracted and pulled, part of force can be transmitted to the supporting legs by the armrests, and part of force is transmitted to the front supporting legs and the rear supporting legs connected with the supporting legs.

Meanwhile, the armrests are obliquely arranged, when a person lies down, hands move along the armrests, one side of each armrest, which is close to the backrest, is lower, the armrest is suitable for a state that the user lies down gradually, and the hands can apply stable pulling force to the armrests;

when people get up, in the initial stage of getting up, exert pulling force to the handrail, the pulling force can be dispersed to back stabilizer blade and preceding back landing leg (back stabilizer blade, back landing leg are the main part), compares traditional design force and mostly concentrate on the back landing leg, and its focus is near forward, and stability is higher.

After a person sits and stands, the forearm is supported on the handrail to exert force, the gravity of the person is exerted on the handrail, and the force is transmitted as above; in the process of gradually standing, as the arm position of a person gradually rises and the position of the person gradually advances, the height of the handrail also gradually rises, and better support can be provided;

therefore, the design of the armrest fully considers the mechanical stability and the force generation of the change of the lying posture of the person, and has the effects of reliability and convenience.

Drawings

Fig. 1 is a front view of embodiment 1;

FIG. 2 is a left side view of example 1;

fig. 3 is a perspective view of embodiment 1;

fig. 4 is a front view of the headrest and water receiving unit of embodiment 1;

fig. 5 is a bottom view of the headrest, water receiving unit of embodiment 1;

fig. 6 is a right side view of the headrest, water receiving unit of embodiment 1;

fig. 7 is a perspective view of the headrest and water receiving unit of embodiment 1;

fig. 8 is a perspective view of the headrest and the water receiving unit of embodiment 1.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the implementations of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Example 1

Referring to fig. 1 to 8, an ophthalmic chair comprises a seat plate 1, a backrest 2, a pair of supporting legs 3 and a pair of armrests 4, wherein the backrest 2 is an adjustable backrest with respect to the seat plate 1; the support legs 3 are positioned below two sides of the seat board 1, the support legs 3 comprise a front support leg 31 and a rear support leg 32, the rear support leg 32 extends to the rear part of the seat board 1, the front support leg 31 extends to the front part of the seat board 1, the front support leg and the rear support leg extend out of the seat board to improve the stability of the chair, the distance between the center of gravity and the front support leg and the rear support leg is prevented from being too large, the armrest 4 comprises an armrest body, a front support leg 41 and a rear support leg 42 which are connected with the armrest body, the front support leg 41 and the rear support leg 42 are positioned between the front support leg 31 and the rear support leg 32, and the front support leg 41, the rear support leg 42, the front support leg 31 and the rear support leg 32 are all in contact with the ground; the armrest body is obliquely arranged, and the height of one side of the armrest body, which is close to the backrest 2, is lower than that of one side of the armrest body, which is far away from the backrest 2; the front leg 41 is fixedly connected with the front leg 31, and the rear leg 42 is fixedly connected with the rear leg 32.

Generally, the angle of the inclined arrangement of the armrest body is not too large, and the included angle of the horizontal surface is preferably 10-30 degrees, more preferably 15-25 degrees. In this embodiment 18.62.

The design of the angle fully considers the relative positions of the trunk and hands of most adults, particularly the old, when lying down, so that the hands can naturally contact the armrests 4 when the trunk is lying on the backrest 2, and can keep continuous and easily-forced contact with the armrests 4 along with the change of the angle of the backrest 2.

According to the chair, the supporting legs of the armrests 4 extend between the front supporting legs and the rear supporting legs, when a patient lies down or gets up, the armrests 4 are retracted, part of force is transmitted to the supporting legs, and part of force is transmitted to the front supporting legs and the rear supporting legs connected with the supporting legs, so that compared with the traditional design of connecting the armrests 4 on the seat plate 1, the force distribution is more uniform, the whole gravity center is kept forward, and the chair is prevented from turning backwards;

meanwhile, the armrests 4 are arranged in an inclined mode, when a person lies down, hands move along the armrests 4, one side of the armrests 4 close to the backrest 2 is lower, the device can adapt to a state that the user lies down gradually, and the hands can apply stable pulling force to the armrests 4;

when a person gets up, in the initial stage of getting up, a pulling force is applied to the handrail 4, the pulling force is dispersed to the rear supporting leg 42 and the front and rear supporting legs (the rear supporting leg 42 and the rear supporting leg 32 are mainly), and compared with the traditional design, the force is mostly concentrated on the rear supporting leg 32, and the gravity center is forward, so that the stability is higher.

After a person sits and stands, the forearm is supported on the armrest 4 to exert force, the gravity of the person is exerted on the armrest 4, and the force is transmitted in the same way; in the process of gradually standing, as the arm position of a person gradually rises and the position of the person gradually advances, the arm is not supported on the armrest 4 any more, and force is applied to the armrest 4 through the hand and the wrist instead, and in the process of changing the posture of the person, the height of the armrest 4 also gradually rises, so that better support can be provided;

therefore, the design of the armrest 4 fully considers the mechanical stability and the force generated by the change of the lying posture of the person, and has the effects of reliability and convenience.

In this embodiment, the armrest body includes an armrest body 43, a U-shaped section 44 open toward the backrest 2, the rear leg 42 is connected to one end of the armrest body 43, the front leg 41 is connected to one end of the U-shaped section 44, and the other end of the U-shaped section 44 is connected to the other end of the armrest body 43. The U-shaped section 44 is designed to facilitate the elderly's grip to pull the body forward to contact the feet, then the forearm, hand, wrist, etc. and arm rest 4 act to stand up gradually. Therefore, for more convenient foot contact, the U-shaped section 44 extends to the front of the seat plate 1 so that the body can move forward more conveniently.

Preferably, the seat board 1 comprises a seat board body 11 and a seat board supporting frame 12 fixedly connected with the seat board body 11, wherein the seat board supporting frame 12 is fixedly connected with the front support legs 41; the support leg 3 further comprises a connecting rod 33 for connecting the front support leg 31 and the rear support leg 32, the support leg 3 is of a U-shaped structure with a downward opening, and the seat plate support frame 12 is fixedly connected with the connecting rod 33. In the embodiment, the front and rear supporting legs and the seat plate supporting frame are preferably made of steel pipes or aluminum alloy pipes;

the seat board 1 is fixedly connected with the front support leg 41 and the front support leg and the rear support leg through the seat board supporting frame 12, so that the gravity of the seat board 1 and the person on the seat board 1 can be dispersed to the front support leg 41 and the front support leg and the rear support leg, and the two sides of the seat board can be uniformly distributed, the overall stability is improved, and the burden of most of the gravity by the front support leg and the rear support leg is avoided;

meanwhile, since the rear leg 42 and the rear leg 32 are fixedly connected, the gravity of the seat plate 1 can be dispersed to the rear leg 32, and in this case, there are 8 ground contact points, which are more stable and reliable.

As another core point of the embodiment, the backrest 2 is connected with a headrest 5, a C-shaped connecting piece 6 and a lifting mechanism 7; the lifting mechanism 7 is fixed on the back surface of the backrest 2, the headrest 5 is hinged with one end of the C-shaped connecting piece 6 in a locking manner, and the other end of the C-shaped connecting piece 6 is hinged with the lifting mechanism 7 in a locking manner;

when the lifting mechanism 7 is lowered to the lowest position, the top of the backrest 2 enters the inside of the C-shaped connecting piece 6 from the opening of the C-shaped connecting piece 6.

That is, the opening of the C-shaped link 6 is oriented towards the backrest 2, which has the advantage that it is suitable for particularly short patients, by adjusting the lifting mechanism 7 to lower the C-shaped link 6 to a very low position, in which the top of the backrest 2 is accessible from the opening of the C-shaped link 6 into the interior of the C-shaped link 6.

Meanwhile, the C-shaped connecting piece 6, the headrest 5 and the lifting mechanism 7 are hinged in a locking mode, so that the angle of the headrest 5 in the vertical direction is randomly adjustable.

As another innovation point of the present embodiment: in this embodiment, the water receiving unit 8 is integrated on the headrest 5, so as to avoid the need of adjusting the water receiving unit 8 and the headrest 5 separately, and meanwhile, this embodiment also optimizes the attaching reliability, angle and position adjustment convenience of the water receiving unit 8.

Specifically, the embodiment further comprises a water receiving unit 8, the water receiving unit 8 comprises a water receiver 81, a water receiver bracket and a bracket fixer, the water receiver bracket is a bracket which rotates universally, the bracket fixer is hinged with one end of the water receiver bracket, the water receiver bracket can move and position between the left side and the right side of the backrest 2 around the bracket fixer, and the bracket fixer is fixed on the C-shaped connecting piece 6; the water receiver bracket is connected with an elastic piece 82, and the elastic piece 82 is used for pulling the water receiver bracket towards the direction of the headrest 5.

When a doctor of the conventional ophthalmologic chair uses the water receiver 81, the doctor must attach the water receiver 81 to the face with one hand and operate the diagnosis and treatment equipment with the other hand; although the conventional ophthalmic chair also has a water receptor stand, the stand is separate from the headrest 5 and does not have an automatic fitting capability, so that it is very inconvenient to use.

The scheme solves the problem through the support which can be universally rotated through the elastic piece 82, the water receiver support is pulled through the elastic piece 82, the water receiver support which can be universally rotated can be attached to the face under the action of the elastic piece 82, and a doctor only needs to adjust the water receiver 81 to the proper position of the face without continuously holding in the diagnosis and treatment process.

The elastic member 82 in this embodiment is a rubber band, and the rubber band has a plurality of holes, and the tension of the elastic member 82 can be adjusted by adjusting the combination position of the holes and the headrest 5, and the elastic member 82 can be a tension spring or the like in practical application.

Preferably, it also comprises a connecting plate 83, one end of the connecting plate 83 is hinged with the C-shaped connecting piece 6 in a fixable mode, and the other end of the connecting plate 83 is hinged with the end part of the water receiver bracket in a fixable mode; the back of the headrest 5 is provided with a grip portion 51 for a person to adjust the position of the headrest 5.

In this embodiment, "fixable hinged" and "lockable hinged" are mostly locked to a predetermined hinge angle by a bolt lock or a latch. This is conventional in the art, and any hinge means that achieves the above objective is within the scope of the present invention in practical applications.

Another difficulty with the use of the water receptor 81 is that it is difficult to fit the water receptor 81 to the face very tightly, and the tightening of the fitting by the elastic member 82 described above may allow the water receptor 81 to be fitted to the face, but the tightness of fitting is not optimal. In order to enable seamless and close fitting of the water receptor 81 and the face, the following is adopted: the water receiver bracket comprises a first rod body 84, a second rod body 85, a plate body 86 and a bracket body, wherein one end of the first rod body 84 is hinged with the connecting plate 83, the first rod body 84 and the second rod body 85 are connected through a lockable ball joint connecting piece 87, the plate body 86 is fixedly connected to the end part of the second rod body 85, a strip-shaped hole is formed in the plate body 86, and the bracket body is fixed on the strip-shaped hole in a position-adjustable mode; the water receiver 81 is fixed in the frame, elastic component 82 one end is connected with the second body of rod 85 and the other end is connected with headrest 5, the frame is including the cup support 88 that is used for holding water receiver 81, torsional spring 89, base 80, cup support 88, torsional spring 89 are fixed on base 80, base 80 passes through the bolt fastening on the bar hole, the water receiver 81 is the contact side with one side of human face, the power end of torsional spring 89 is fixed connection for one side of contact side with water receiver 81.

The first rod body 84 is connected with the second rod body 85 through the ball joint connecting piece 87, the second rod body 85 is connected with the elastic piece 82, and the elastic piece 82 directly acts on the second rod body 85 to enable the water receiver 81 to be attached to the face at any acceptable angle;

simultaneously, outwards pull one side of the water receiver 81 through the torsional spring 89, avoid the water receiver 81 to push outwards with the human face when water receiver 81 and human face laminating (because cup support 88 can not be fixed with water receiver 81 seamless), whole taut in the scope that can push outwards with water receiver 81 in advance through torsional spring 89, water receiver 81 just can not rock when laminating with the face like this, through the two direction effort of elastic component 82, torsional spring 89, can make water receiver 81 closely laminating human face not shift.

As an optimization of the embodiment, the armrests 4 are provided with soft cushions 43; a cross bar 21 is arranged between the two rear supporting legs 32, an electric push rod 22 is hinged on the cross bar 21, and the power output end of the electric push rod 22 is hinged with the back of the backrest 2; the cross bar 21 extends between the rear leg 32 and the rear foot 42, and the hinge position of the air cylinder 22 is located between the rear leg 32 and the rear foot 42;

a backrest bracket 23 is fixed on the back of the backrest 2;

the bottoms of the front support leg 41, the rear support leg 42, the front support leg 31 and the rear support leg 32 are respectively provided with a leveling anti-skid foot pad.

The position of the electric putter 22 of this embodiment is particularly optimized, and the point of action of the electric putter 22 extends between the rear leg 32 and the rear foot 42, since the weight of the back of the person is acting on the backrest 2, the weight of the backrest 2 is transferred to the crossbar 21 via the electric putter 22, and the position of the crossbar 21 is important for the position of the center of gravity.

In the above, it is emphasized that the rear leg 42 plays a great supporting role when a person is lying up or down, where the position of the cross bar 21 is optimized, and after the person is completely lying down, the position of the center of gravity thereof does not change much, so that the overall stability of the chair is very high when the posture of the person is changed.

Overview:

1. the stability of the person when the person is in a posture change or lying down is closely related to the position of the center of gravity of the chair, the position of the center of gravity of the chair is closely related to the positions of the front and rear legs, the cross bar 21 and the angle of the armrests 4, and at least the four times have close cooperation;

2. the headrest 5 is optimized and can be suitable for people with different body types;

3. the headrest 5 and the water receiving unit 8 are optimized, and the angle adjustment convenience, the position adjustment convenience, the synchronous adjustment convenience of the headrest 5 and the water receiving unit 8, the operation convenience and the reliability of the water receiver 81 are improved.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An ophthalmic chair comprises a seat plate, a backrest, a pair of supporting legs and a pair of armrests, wherein the backrest is an angle-adjustable backrest between the backrest and the seat plate; the support legs are positioned below two sides of the seat board and comprise a front support leg and a rear support leg, the rear support leg extends to the rear part of the seat board, and the front support leg extends to the front part of the seat board; the armrest body is obliquely arranged, and the height of one side of the armrest body close to the backrest is lower than that of one side of the armrest body away from the backrest; the front support leg is fixedly connected with the front support leg, and the rear support leg is fixedly connected with the rear support leg.

2. The chair of claim 1, wherein the armrest body comprises an armrest body, a U-shaped section open to the backrest, the rear leg being connected at one end of the armrest body, the front leg being connected at one end of the U-shaped section, the other end of the U-shaped section being connected with the other end of the armrest body.

3. An ophthalmic chair according to claim 2, wherein the angle between the armrest body and horizontal is 15-25 °, and the U-shaped section extends to the front of the seat plate.

4. The ophthalmic chair of claim 1, wherein the seat plate comprises a seat plate body and a seat plate support frame fixedly connected to the seat plate body, the seat plate support frame being fixedly connected to the front leg and/or the rear leg; the landing leg further comprises a connecting rod for connecting the front landing leg and the rear landing leg, the landing leg is of a U-shaped structure with a downward opening, and the seat plate supporting frame is fixedly connected with the connecting rod.

5. The ophthalmic chair of claim 1, wherein a headrest, a C-shaped connector, and a lifting mechanism are attached to the backrest; the headrest is hinged with one end of the C-shaped connecting piece in a lockable manner, and the other end of the C-shaped connecting piece is hinged with the lifting mechanism in a lockable manner;

when the lifting mechanism descends to the lowest position, the top of the backrest enters the C-shaped connecting piece from the opening of the C-shaped connecting piece.

6. The chair of claim 5, further comprising a water receiving unit comprising a water receiver, a water receiver support, a support holder, the water receiver support being a gimbaled support, the support holder being hinged to one end of the water receiver support, the water receiver support being movable and positionable about the support holder between left and right sides of the backrest, the support holder being secured to the C-shaped connector; the water receiver bracket is connected with an elastic piece, and the elastic piece is used for pulling the water receiver bracket towards the headrest direction.

7. The ophthalmic chair of claim 6, further comprising a connecting plate, one end of the connecting plate being fixably hinged to the C-shaped connector, the other end of the connecting plate being fixably hinged to an end of the water receptor bracket; the elastic piece is an elastic piece with adjustable pulling force, and the back of the headrest is provided with a holding part for adjusting the position of the headrest by a person.

8. The ophthalmic chair according to claim 7, wherein the water receiver support comprises a first rod body, a second rod body, a plate body and a frame body, wherein one end of the first rod body is hinged with the connecting plate, the first rod body is connected with the second rod body through a lockable ball joint connecting piece, the plate body is fixedly connected to the end part of the second rod body, a strip-shaped hole is formed in the plate body, and the frame body is fixed on the strip-shaped hole in a position-adjustable manner; the water receiver is fixed in the frame body, one end of the elastic piece is connected with the second rod body, and the other end of the elastic piece is connected with the headrest.

9. The chair of claim 8, wherein the frame comprises a cup holder, a torsion spring, and a base for receiving the water receiver, wherein the cup holder and the torsion spring are fixed on the base, the base is fixed on the bar-shaped hole by bolts, one side of the water receiver, which is in contact with the face of the human body, is a contact side, and a power end of the torsion spring is fixedly connected with one side of the water receiver opposite to the contact side.

10. The chair according to any one of claims 1 to 9, wherein the armrests are provided with cushions; a cross rod is arranged between the two rear supporting legs, an air cylinder, an oil cylinder or an electric cylinder is hinged on the cross rod, and the power output end of the oil cylinder or the electric cylinder is hinged with the back of the backrest; the cross rod extends to a position between the rear supporting leg and the rear supporting leg, and the hinging position of the air cylinder is positioned between the rear supporting leg and the rear supporting leg;

a backrest bracket is fixed on the back of the backrest;

the bottoms of the front support leg, the rear support leg, the front support leg and the rear support leg are respectively provided with a leveling anti-skid foot pad.