CN112932882A

CN112932882A - Head fixing and disturbance preventing device and method for ophthalmologic operation

Info

Publication number: CN112932882A
Application number: CN202110180207.1A
Authority: CN
Inventors: 王逸文; 张莉薇; 李芳玲
Original assignee: Second Xiangya Hospital of Central South University
Current assignee: Second Xiangya Hospital of Central South University
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-06-11

Abstract

The invention provides a head fixing and disturbance preventing device for ophthalmologic operation, which comprises head fixing and disturbance preventing units, wherein the head fixing and disturbance preventing units are used in pairs and are used for fixing two sides of a head respectively, each head fixing and disturbance preventing unit comprises a main telescopic device, an upper auxiliary telescopic device, a lower auxiliary telescopic device, a telescopic clamping device and a main controller, and the main controller is used for controlling the movement of a main telescopic device piston in the main telescopic device and the movement of auxiliary telescopic device pistons in the upper auxiliary telescopic device and the lower auxiliary telescopic device so that the telescopic clamping device is contacted with the head of a patient to clamp the head of the patient. By the technical scheme, the optimal clamping force can be provided for the head of the patient, the optimal posture control can be provided for the implementation of the ophthalmic surgery, and the surgical errors caused by slight vibration and disturbance of the head of the patient during the ophthalmic surgery can be eliminated, so that the surgical quality and speed of an ophthalmic surgeon can be improved, the time of the patient in an operating room can be reduced, and the pain time can be reduced.

Description

Head fixing and disturbance preventing device and method for ophthalmologic operation

Technical Field

The invention relates to the technical field of medical instruments, in particular to a head fixing and disturbance preventing device and method for an ophthalmologic operation.

Background

In clinical ophthalmic operations, such as glaucoma operation, lacrimal apparatus operation, eye tumor operation, cataract ultrasonic emulsification operation, foldable intraocular lens implantation, multifocal intraocular lens implantation, intraocular lens implantation with iris, and the like, and in high-difficulty vitreous body and retina operations of ophthalmology, complicated retinal detachment, removal of non-magnetic foreign bodies in the ball, standard trabecular resection, combined trabecular resection, and the like, the patients need to be injected with anesthetic before the operations. Therefore, in the course of these related operations, the patient is often in an unconscious state, the head may have involuntary slight tremor or peristalsis, especially in children, the head may have involuntary disturbance, which may seriously interfere with the operation of the ophthalmologist, and in serious cases may even cause operation errors, thereby affecting the operation effect, and even further increasing the lesion of the patient. Therefore, it is very necessary to develop a device and a method for fixing the head of a patient with an ophthalmic disease during an operation, and adjusting the head position and posture of the patient in real time according to the ideal operation position of an ophthalmologist, thereby facilitating the operation of the ophthalmologist and improving the operation quality and operation efficiency. In addition, the head fixing device must consider the age level of the patient again, and the size of the head shape is adjusted, according to the head contour of the patient, the head shape of the patient can be fitted to the maximum extent, and a large enough contact area can be provided, so that the head of the patient can be sufficiently fixed by the clamping mechanism, and the comfortable experience effect is improved.

Currently, head fixation devices have been developed. Chinese patent CN203647646U discloses an ophthalmic head fixing device, which comprises a fixing plate with a head placing groove, a hook and a fixing strap, wherein the inner surface of the fixing plate is provided with a soft pad and the like. However, the patent has the following problems in the real-time process: the fixing device is fixed on the operating bed through the hook, so that the fixing device is not firm enough and is easy to cause potential safety hazards; in addition, the angle of the head needs to be continuously adjusted by medical staff in the implementation process of the ophthalmic surgery so as to achieve the most suitable surgical visual angle, and the head of the patient cannot be accurately measured, controlled and adjusted in posture, so that the implementation of the surgery is affected by extremely adverse effects, and the surgery quality of an ophthalmic doctor is affected. Chinese patent CN107898586A discloses a head fixing device for ophthalmologic surgery, which includes an operating table, an object, a driving mechanism, a fixing mechanism, etc., but this patent lacks an ergonomic design concept in design, adopts a fixing plate to fix the head of a patient, and does not fully consider the head contour of the patient, so that it is not possible to provide accurate head position control and head posture adjustment, let alone consider the comfort problem of head fixation of the patient; chinese patent CN110801287A discloses a pediatric head fixation device, which comprises a main board, a left fixation block and a right fixation block. Although the patent considers a certain ergonomic design concept and adopts a curved surface design, the head of the patient can be attached to a certain extent, but the head of the patient can only be horizontally and transversely fixed, and the position of the head of the patient cannot be controlled; chinese patent CN201098254Y discloses a head fixing device for pediatric ophthalmic surgery, which comprises a bottom plate, a splint and a bolt. The patent also lacks of a human-machine engineering design concept and does not consider the problems of head fixation comfort and the like of a patient; chinese patent CN20251821U discloses an ophthalmologic operation head fixing device, which comprises a fixing plate with a head placing groove, a fixing strap, and a cushion placed on the inner surface of the fixing plate, although the comfort of the head of a patient is considered, since the fixing plate and the fixing strap occupy too much space of an operating table, the operating space of ophthalmologic related operation equipment is greatly squeezed, which is not beneficial to the precise operation of an ophthalmologist; furthermore, the position adjustment of the patient's head cannot be controlled in relation to the posture control as well.

To sum up, the above-mentioned patent fails to fully consider the theory of ergonomic design, satisfies promptly to patient's head rigidity under, still needs to carry out appropriate adjustment according to patient's head size and head profile, laminating patient's head type by a maximum margin, and then can provide enough big area of contact for clamping mechanism can fully fix patient's head, and reaches and improve comfortable experience effect. In addition, the above patents do not fully embody precise control of the patient's head fixation position and posture adjustment.

Disclosure of Invention

The invention aims to: the head fixing and disturbance preventing device and method for the ophthalmic surgery provide the optimal clamping force for the head of a patient, provide the optimal posture control for the implementation of the ophthalmic surgery, and eliminate surgical errors caused by slight vibration and disturbance of the head of the patient during the ophthalmic surgery, so that the surgical quality and speed of an ophthalmic surgeon are improved, the time of the patient in an operating room is reduced, and the pain time is reduced.

The technical scheme of the invention is as follows: an ophthalmic surgery head fixing and disturbance preventing device comprises head fixing and disturbance preventing units which are used in pairs and respectively fix two sides of a head, wherein the head fixing and disturbance preventing units comprise a main telescopic device, an upper auxiliary telescopic device, a lower auxiliary telescopic device, a telescopic clamping device and a main controller,

the main telescopic device comprises a main telescopic device support, a main telescopic device shell, a main telescopic device piston and a main telescopic device piston push rod, the main telescopic device support is fixed on an operating table, the main telescopic device shell is fixed on the inner side of the main telescopic device support, the main telescopic device piston is fixedly connected with the main telescopic device piston push rod, the main telescopic device piston is matched with the inner wall of the main telescopic device shell, the main telescopic device piston push rod is fixedly connected with the telescopic clamping device, and the telescopic clamping device is driven to be far away from or close to the head of a patient by the movement of the main telescopic device piston in the main telescopic device shell;

the upper auxiliary expansion device and the lower auxiliary expansion device are positioned at the upper side and the lower side of the main expansion device, one end of the upper auxiliary expansion device and the lower auxiliary expansion device is arranged on the main expansion device shell through an auxiliary expansion device lower spherical kinematic pair, the other end of the upper auxiliary expansion device and the lower auxiliary expansion device are connected with the upper section or the lower section of the telescopic clamping device through an auxiliary expansion device upper spherical kinematic pair, the upper auxiliary expansion device and the lower auxiliary expansion device are identical in structure and comprise an auxiliary expansion device shell, an auxiliary expansion device piston and an auxiliary expansion device piston push rod, the auxiliary expansion device piston and the auxiliary expansion device piston push rod are fixedly connected, the auxiliary expansion device piston is matched with the inner wall of the auxiliary expansion device shell, the auxiliary expansion device piston push rods of the upper auxiliary expansion device and the, the upper section and the lower section of the telescopic clamping device are driven to bend by the telescopic motion of the upper auxiliary telescopic device and the lower auxiliary telescopic device;

the telescopic clamping device is of a sectional type structure, the upper section and the lower section are both variable radian head type patches, the middle section of the telescopic clamping device is arranged between the upper section and the lower section, and the included angle between the variable radian head type patches of the upper section and the lower section and the middle section of the telescopic clamping device is variable under the driving of the auxiliary telescopic device;

the main controller monitors the telescopic positions of the main telescopic device, the upper auxiliary telescopic device and the lower auxiliary telescopic device, monitors the clamping force of the telescopic clamping device on the head of the patient, and controls the clamping force of the telescopic clamping device on the head of the patient by controlling the telescopic degrees of the main telescopic device, the upper auxiliary telescopic device and the lower auxiliary telescopic device.

The invention also provides an ophthalmic surgical head fixing and disturbance preventing method, which comprises the following steps:

two groups of head fixing and disturbance preventing units are placed on two sides of the head of a patient and are fixed on an operating table through a left main expansion device bracket and a right main expansion device bracket;

the main controller controls a main telescopic device piston in the main telescopic device, an upper auxiliary telescopic device and an auxiliary telescopic device piston in the lower auxiliary telescopic device to return to the initial position;

the main controller controls the main telescopic device piston in the main telescopic device to move until the telescopic clamping device is contacted with the head of the patient, pressure is applied to the head of the patient, and when the pressure reaches a preset set value, the main telescopic device piston is controlled to stop moving;

the main controller controls the upper auxiliary telescopic device and the lower auxiliary telescopic device to move through the auxiliary telescopic device pistons, the variable radian head-shaped patch contracts to be in contact with the head of a patient, pressure is applied to the head of the patient, and when the pressure reaches a preset set value, the auxiliary telescopic device pistons are controlled to stop moving.

The invention has the beneficial effects that:

(1) according to the head fixing and disturbance preventing device and method for the ophthalmic surgery, provided by the invention, the head of a patient is clamped and controlled; meanwhile, the head of the patient can be properly adjusted in position and controlled in posture within a normal torsion range, so that surgical errors caused by slight vibration and disturbance of the head of the patient during ophthalmic surgery can be eliminated;

(2) according to the head fixing and disturbance preventing device and method for the ophthalmologic operation, provided by the invention, during clamping, enough supporting force can be improved, so that the head of a patient can be comfortably fixed at a certain position in space for a long time, and the requirement on controlling the position of the head of the patient during the operation is met;

(3) according to the head fixing and disturbance preventing device and method for the ophthalmologic operation, provided by the invention, the head can be properly adjusted according to the size of the head of a patient, and the head shape of the patient can be fitted to the maximum extent according to the head contour of the patient, so that a large enough contact area can be provided, the head of the patient can be fully fixed by a clamping mechanism, and the comfortable experience effect is improved;

(4) according to the head fixing and disturbance preventing device and method for the ophthalmic surgery, provided by the invention, the pressure of the clamping mechanism on the head of the patient can be detected in real time, and once the maximum allowable pressure is exceeded, the pressure is automatically controlled, namely, the pressure is stabilized under the allowable maximum pressure, so that the influence on the head of the patient caused by overlarge clamping pressure can be prevented;

(5) according to the head fixing and disturbance preventing device and method for the ophthalmic surgery, provided by the invention, the main controller is adopted to acquire the position of each clamping telescopic device and the pressure of the clamping mechanism in real time, so that the optimal clamping force is provided for the head of a patient according to the head shape of the patient, and the optimal posture control is provided for the implementation of the ophthalmic surgery.

Drawings

The advantages of the above and/or additional aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of the overall structure of an ophthalmic surgical head fixation and anti-disturbance device provided by the present invention;

FIG. 2 is a schematic diagram of oil pump control in the main and auxiliary telescoping devices;

FIG. 3 is a schematic view of the main retractor;

FIG. 4 is a schematic view showing the connection of the main expansion device, the auxiliary expansion device and the retractable clamping device;

FIG. 5 is a schematic view of the structure of the main retractor pusher anchor plate;

FIG. 6 is a schematic view of the structure of the auxiliary telescoping device;

FIG. 7 is a side view (left) and a left side view (right) of the retractable clamping device;

FIG. 8 is a schematic view of the construction of the telescoping member anchor tab;

FIG. 9 is a schematic view of the head fixation and anti-disturbance device self-checking and return control;

FIG. 10 is a schematic view of the head fixation and anti-perturbation device movement;

fig. 11 is a schematic side view (left) and a left side view (right) of the telescoping member motion control.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

According to a first aspect of the present invention, as shown in fig. 1, there is provided an ophthalmologic operation head fixing and disturbance preventing apparatus including a head fixing and disturbance preventing unit for fixing both sides of a head, respectively, in a pair, the head fixing and disturbance preventing unit including a main retractor, an upper auxiliary retractor 70, a lower auxiliary retractor 71, a retractable clamping device, and a main controller 40, wherein,

the main telescopic device comprises a main telescopic device support 1, a main telescopic device shell 55, a main telescopic device piston 49 and a main telescopic device piston push rod 50, wherein the main telescopic device support 1 is fixed on an operating table, the main telescopic device shell 55 is fixed on the inner side of the main telescopic device support 1, the main telescopic device piston 49 is fixedly connected with the main telescopic device piston push rod 50, the main telescopic device piston 49 is matched with the inner wall of the main telescopic device shell 55, the main telescopic device piston push rod 50 is fixedly connected with a telescopic clamping device, and the telescopic clamping device is driven to be far away from or close to the head of a patient by the main telescopic device piston 49 moving in the main telescopic device shell 55 (exemplified by a head model 9 in the figure);

the upper auxiliary telescoping device 70 and the lower auxiliary telescoping device 71 are positioned at the upper side and the lower side of the main telescoping device, one end of the upper auxiliary telescoping device is arranged on the main telescoping device shell 55 through the lower spherical kinematic pair 3 of the auxiliary telescoping device, the other end of the upper auxiliary telescoping device is connected with the upper section or the lower section of the telescopic clamping device through the upper spherical kinematic pair 7 of the auxiliary telescoping device, the upper auxiliary telescoping device 70 and the lower auxiliary telescoping device 71 are identical in structure and comprise an auxiliary telescoping device shell 4, an auxiliary telescoping device piston 61 and an auxiliary telescoping device piston push rod 62, the auxiliary telescoping device piston 61 and the auxiliary telescoping device piston push rod 62 are fixedly connected, the auxiliary telescoping device piston 61 is matched with the inner wall of the auxiliary telescoping device shell 4, the auxiliary telescoping device piston push rods 62 of the upper auxiliary telescoping device 70 and the lower auxiliary telescoping device 71 are respectively connected with the upper section and the lower section of the telescopic clamping device, and the upper section and the lower section of the telescopic Bending to fit and clamp the head of the patient;

the telescopic clamping device is of a sectional type structure, the upper section and the lower section are both variable radian head-shaped patches 8, a middle section 68 of the telescopic clamping device is arranged between the upper section and the lower section, and the included angles between the variable radian head-shaped patches 8 of the upper section and the lower section and the middle section 68 of the telescopic clamping device are variable under the driving of the auxiliary telescopic device, so that the head fixing requirements of different patients are met;

the main controller 40 monitors the telescopic positions of the main telescopic device, the upper auxiliary telescopic device 70 and the lower auxiliary telescopic device 71, monitors the clamping force of the telescopic clamping device on the head of the patient, and controls the clamping force of the telescopic clamping device on the head of the patient by controlling the telescopic degrees of the main telescopic device, the upper auxiliary telescopic device 70 and the lower auxiliary telescopic device 71.

In the present invention, as shown in fig. 1 and 2, in the head fixing and disturbance preventing device, a main telescopic device, an upper auxiliary telescopic device 70 and a lower auxiliary telescopic device 71 perform telescopic motion in a hydraulic oil driving manner, and at this time, the head fixing and disturbance preventing device is divided into an upper oil path and a lower oil path, the upper oil path includes an upper hydraulic oil tank 14, a main telescopic device oil path and an upper auxiliary telescopic device oil path, and the main telescopic device oil path includes a lower main telescopic device oil pipe 2 and an upper main telescopic device oil pipe 5 which are respectively communicated with both ends of a main telescopic device housing 55; the upper auxiliary telescopic device oil path comprises an upper auxiliary telescopic device upper oil pipe 10 and an upper auxiliary telescopic device lower oil pipe 24 which are respectively communicated with two ends of the upper auxiliary telescopic device 70; hydraulic oil in the upper hydraulic oil tank 14 enters and exits the main telescopic device and the upper auxiliary telescopic device 70 through two-way oil pipes, and bidirectional circulation of the hydraulic oil in the main telescopic device and the upper auxiliary telescopic device 70 is implemented; the lower oil path comprises a lower hydraulic oil tank 28 and a lower auxiliary telescopic device oil path, and the upper auxiliary telescopic device oil path comprises a lower auxiliary telescopic device upper oil pipe and a lower auxiliary telescopic device lower oil pipe which are respectively communicated with two ends of the lower auxiliary telescopic device 71; hydraulic oil in the lower hydraulic oil tank 28 enters and exits the lower auxiliary telescopic device 71 through a double-way oil pipe, and bidirectional circulation of the hydraulic oil in the lower auxiliary telescopic device 71 is realized; alternatively, the main telescopic device oil path may also be provided in the lower oil path.

Further, as shown in fig. 1 and fig. 2, the main retractor oil circuit further includes a main retractor upper oil pump 12, a main retractor upper return electromagnetic valve 16, a main retractor upper pressure stabilizing electromagnetic valve 17, a main retractor lower return electromagnetic valve 20, a main retractor lower oil pump 21 and a main retractor lower pressure stabilizing electromagnetic valve 23, which are both connected to the main controller 40, wherein the main retractor upper pressure stabilizing electromagnetic valve 17 is installed at a position of the upper main retractor oil pipe 5 close to the main retractor housing 55, and the main retractor lower pressure stabilizing electromagnetic valve 23 is installed at a position of the lower main retractor oil pipe 2 close to the main retractor housing 55, so as to stabilize the oil pressure inside the main retractor housing 55 and control the position of the middle section 68 of the retractable clamping device, thereby controlling the position of the head of the patient; the main telescopic device upper oil pump 12 and the main telescopic device upper return electromagnetic valve 16 are respectively connected with the upper main telescopic device oil pipe 5 through pipelines, and are arranged between the main telescopic device upper pressure stabilizing electromagnetic valve 17 and the upper hydraulic oil tank 14 and used for controlling the direction of hydraulic oil in the upper main telescopic device oil pipe 5; the main telescopic device lower return electromagnetic valve 20 and the main telescopic device lower oil pump 21 are respectively connected with the lower main telescopic device oil pipe 2 through pipelines, and are arranged between the main telescopic device lower pressure stabilizing electromagnetic valve 23 and the upper hydraulic oil tank 14 and used for controlling the direction of hydraulic oil in the lower main telescopic device oil pipe 2; the piston position of the main retractor housing 55 can be controlled by the main controller 40 controlling the solenoid valves and oil pumps to achieve position control of the retractable clamping device and thus clamp the head model.

Further, as shown in fig. 1 and 2, the oil circuit of the upper auxiliary telescopic device further comprises a pressure stabilizing solenoid valve 11 on the upper auxiliary telescopic device, an oil pump 12 on the upper auxiliary telescopic device and a return solenoid valve 13 on the upper auxiliary telescopic device, and an upper auxiliary telescoping device lower return electromagnetic valve 18, an upper auxiliary telescoping device lower oil pump 19 and an upper auxiliary telescoping device lower pressure stabilizing electromagnetic valve 22, both of which are connected with a main controller 40, wherein, the pressure stabilizing solenoid valve 11 on the upper auxiliary expansion device is arranged at the position of the oil pipe 10 on the upper auxiliary expansion device close to the upper auxiliary expansion device 70, and the upper auxiliary telescoping device lower pressure stabilizing solenoid valve 22 is installed at the position of the upper auxiliary telescoping device lower oil pipe 24 close to the upper auxiliary telescoping device 70, the two solenoid valves are used for stabilizing the oil pressure in the upper auxiliary telescopic device 70, thereby controlling the spatial position of the variable arc head patch 8; the upper auxiliary telescopic device upper oil pump 12 and the upper auxiliary telescopic device upper return electromagnetic valve 13 are respectively connected with the upper auxiliary telescopic device upper oil pipe 10 through pipelines, are arranged between the upper auxiliary telescopic device upper pressure stabilizing electromagnetic valve 11 and the upper hydraulic oil tank 14, and are used for controlling the hydraulic oil direction in the upper auxiliary telescopic device upper oil pipe 10; the upper auxiliary telescopic device lower return electromagnetic valve 18 and the upper auxiliary telescopic device lower oil pump 19 are respectively connected with an upper auxiliary telescopic device lower oil pipe 24 through pipelines, and are arranged between the upper auxiliary telescopic device lower pressure stabilizing electromagnetic valve 22 and the upper hydraulic oil tank 14 and used for controlling the direction of hydraulic oil in the upper auxiliary telescopic device lower oil pipe 24; the position of the piston of the upper auxiliary telescopic device 70 can be controlled by controlling the electromagnetic valve and the oil pump by the main controller 40, so that the position control of the spherical kinematic pair 7 and the variable radian head type patch 8 on the auxiliary telescopic device is realized.

Further, as shown in fig. 1, the oil path of the lower auxiliary telescopic device further comprises a lower pressure stabilizing solenoid valve 25 of the lower auxiliary telescopic device, a lower oil pump 26 of the lower auxiliary telescopic device and a lower return solenoid valve 27 of the lower auxiliary telescopic device, and a lower auxiliary telescopic device upper pressure stabilizing solenoid valve 29, a lower auxiliary telescopic device upper return solenoid valve 30 and a lower auxiliary telescopic device upper oil pump 31, both of which are connected with a main controller 40, wherein, the lower pressure stabilizing electromagnetic valve 25 of the lower auxiliary telescopic device is arranged at the position of the lower oil pipe of the lower auxiliary telescopic device close to the lower auxiliary telescopic device 71, and the upper pressure stabilizing solenoid valve 29 of the lower auxiliary telescopic device is arranged at the position of the oil pipe of the lower auxiliary telescopic device close to the lower auxiliary telescopic device 71, the two solenoid valves are used for stabilizing the oil pressure in the lower auxiliary telescopic device 71 so as to control the space position of the variable arc head patch 8; the lower oil pump 26 of the lower auxiliary telescoping device and the lower return solenoid valve 27 of the lower auxiliary telescoping device are respectively connected with the lower oil pipe of the lower auxiliary telescoping device through pipelines, and are arranged between the lower pressure stabilizing solenoid valve 25 of the lower auxiliary telescoping device and the lower hydraulic oil tank 28 for controlling the direction of hydraulic oil in the oil pipe of the lower auxiliary telescoping device 71; the upper return electromagnetic valve 30 of the lower auxiliary telescopic device and the upper oil pump 31 of the lower auxiliary telescopic device are respectively connected with the upper oil pipe of the lower auxiliary telescopic device through pipelines, are arranged between the upper pressure stabilizing electromagnetic valve 29 of the lower auxiliary telescopic device and the lower hydraulic oil tank 28 and are used for controlling the direction of hydraulic oil in the oil pipe of the lower auxiliary telescopic device 71; the position of the piston of the lower auxiliary telescopic device 71 can be controlled by controlling the electromagnetic valve and the oil pump by the main controller 40, so that the position control of the spherical kinematic pair 7 and the variable radian head type patch 8 on the auxiliary telescopic device is realized; finally, through to the variable radian head type paster 8 about to, and the accurate position control of variable radian head type paster 8 from top to bottom to can adjust according to patient's head shape.

In the present invention, as shown in fig. 3 and 4, in the main telescopic device, a lower main telescopic device oil port 46 and an upper main telescopic device oil port 51 are processed on a main telescopic device shell 55, and the lower main telescopic device oil port 46 is close to the main telescopic device bracket 1 and is communicated with a lower main telescopic device oil pipe 2; the upper main telescopic device oil port 51 is far away from the main telescopic device bracket 1 and is communicated with the upper main telescopic device oil pipe 5.

Further, the one end that main telescoping device casing 55 kept away from main telescoping device support 1 is the open end for the reciprocating telescoping motion of main telescoping device piston push rod 50 in main telescoping device casing 55, and main telescoping device push rod seal stationary blade 53 is installed through main telescoping device push rod seal stationary blade bolt 54 in the open end outside for sealed main telescoping device piston push rod 50 prevents the hydraulic oil outflow in the main telescoping device casing 55.

Further, a main retractor piston position detector 52 is mounted on a closed surface of an inner open end of the main retractor housing 55 and used for detecting a specific position of the main retractor piston 49 in the main retractor housing 55, so that a spatial position of the middle section 68 of the telescopic clamping device is controlled, and accurate positioning of the head of the patient is achieved.

Further, a main retractor piston upper stop 48 and/or a main retractor piston lower stop 39 are machined on the inner wall of the main retractor housing 55 near the main retractor bracket 1 as the initial position of the main retractor piston 49.

Further, as shown in fig. 5, the end of the main telescoping device piston push rod 50 is fixed with a main telescoping device push rod fixing plate 38, a telescopic clamping device fixing plate piston push rod hole 45 and a main telescoping device push rod fixing plate screw hole 56 are provided on the main telescoping device push rod fixing plate 38, the main telescoping device piston push rod 50 is positioned on the main telescoping device push rod fixing plate 38 through the telescopic clamping device fixing plate piston push rod hole 45, and the main telescoping device piston push rod fixing plate screw hole 56 and the main telescoping device push rod fixing plate bolt 42 are connected with a telescopic clamping device middle section 68, so that the main telescoping device piston push rod 50 and the telescopic clamping device middle section 68 are rigidly fixed.

In the present invention, as shown in fig. 6, one end of the auxiliary telescoping device housing 4 of the upper auxiliary telescoping device 70 and the lower auxiliary telescoping device 71 facing the telescoping clamp is an open end for assisting the reciprocating telescoping motion of the telescoping device piston push rod 62 in the auxiliary telescoping device housing 4, and an auxiliary telescoping device push rod sealing fixing plate 65 is installed outside the open end for sealing the auxiliary telescoping device housing 4 to prevent the hydraulic oil in the auxiliary telescoping device from flowing out.

Further, as shown in fig. 6, an auxiliary retractor piston position detector 66 is mounted on a closed surface of the inner open end of the auxiliary retractor housing 4, and is used for detecting a specific position of the auxiliary retractor piston 61 in the auxiliary retractor housing 4, so as to determine a spatial position of the variable arc head patch 8.

Further, as shown in fig. 6, an upper limit stopper 58 and/or a lower limit stopper 59 of the auxiliary retractor piston are/is formed on the inner wall of the auxiliary retractor housing 4 away from the retractable clamping device as an initial position of the auxiliary retractor piston 61.

Further, as shown in fig. 3 and fig. 6, one end of the auxiliary telescopic device housing 4, which is far away from the telescopic clamping device, is connected with an auxiliary telescopic device lower ball joint 57 through an auxiliary telescopic device lower ball joint rod 60, main telescopic device lower ball grooves 47 are processed on the upper and lower sides of the main telescopic device housing 55, the two auxiliary telescopic device lower ball joints 57 and the two main telescopic device lower ball grooves 47 form two auxiliary telescopic device lower ball kinematic pairs 3, the connection of the two auxiliary telescopic devices and the main telescopic device is implemented, and the arbitrary rotation of the auxiliary telescopic device at the spatial position is realized;

as shown in fig. 6 and 7, one end of the piston push rod 62 of the auxiliary telescopic device is connected to an upper ball joint 63 of the auxiliary telescopic device through an upper ball joint rod 64 of the auxiliary telescopic device, the outer sides of the variable arc head patches 8 of the upper section and the lower section of the telescopic clamping device are both processed with upper ball holes 41 of the auxiliary telescopic device, the upper ball joints 63 of the two auxiliary telescopic devices and the upper ball holes 41 of the two auxiliary telescopic devices form two upper ball kinematic pairs 7 of the auxiliary telescopic device, and the two auxiliary telescopic devices are connected to the upper variable arc head patches 8 of the upper section and the lower section.

In the present invention, as shown in fig. 7, the upper and lower variable arch head patches 8 and the intermediate section 68 of the retractable clip are connected by a variable arch head patch hinge 33.

Further, as shown in fig. 7 and 8, the retractable part 34 is symmetrically installed near both end positions in the retractable clamping device middle section 68, which is a retractable flexible body or an elastic body, the retractable part fixing piece 37 is installed outside the retractable part 34, the retractable part fixing piece bolt groove 44 is processed on the retractable part fixing piece 37, an arbitrary position in the retractable part fixing piece bolt groove 44 corresponds to one retractable part fixing piece threaded hole 67, the retractable part fixing piece 37 is installed in the retractable part fixing piece threaded hole 67 through the retractable part fixing piece bolt 36 to be installed outside the retractable part 34, and real-time adjustment of the length of the retractable part 34 is implemented through the position of the retractable part fixing piece bolt 36 in the retractable part fixing piece bolt groove 44.

Further, as shown in fig. 1, in the retractable clamping device, a pressure strain gauge 32 is adhered to the inner surface of the upper and/or lower variable arc head patch 8, and is used for measuring the stress of the variable arc head patch 8 on the head of the patient in real time and feeding back the stress to the main controller 40 in real time.

Further, as shown in fig. 1, the inner surface of the middle section 68 of the retractable clamping device is adhered with the main strain gauge 35 for real-time measuring the stress of the middle section 68 of the retractable clamping device on the head of the patient and feeding back to the main controller 40.

Further, as shown in fig. 4, the inner surfaces of the upper and lower variable camber head patches 8 and the middle section 68 of the retractable clamping device are adhered with buffer layers 69, which is beneficial for providing a comfortable contact surface.

Further, as shown in fig. 7, in the retractable clamping device, the outer surfaces of the upper and lower variable arc head patches 8 are processed with a horizontal auxiliary expansion device upper ball joint sliding groove 43, and any position in the auxiliary expansion device upper ball joint sliding groove 43 corresponds to an auxiliary expansion device upper ball hole 41, so that the auxiliary expansion device piston push rod 62 controls the spatial position and the operation action of the variable arc head patches 8 at multiple points.

According to a second aspect of the present invention, there is provided an ophthalmic surgical head fixation and anti-perturbation method comprising:

two groups of head fixing and disturbance preventing units are placed on two sides of the head of a patient and are fixed on an operating table through a left main expansion device bracket 1 and a right main expansion device bracket 1;

the main controller 40 controls the main retractor piston 49 in the main retractor, the upper auxiliary retractor 70 and the auxiliary retractor piston 61 in the lower auxiliary retractor 71 to return to the initialization position; as shown in fig. 9;

the main controller 40 controls the main telescopic device piston 49 in the main telescopic device to move until the telescopic clamping device is contacted with the head of the patient, applies pressure to the head of the patient, and controls the main telescopic device piston 49 to stop moving when the pressure reaches a preset set value; as shown in fig. 10;

the main controller 40 controls the auxiliary retractor piston 61 in the upper auxiliary retractor 70 and the lower auxiliary retractor 71 to move, the variable arc head patch 8 contracts to contact with the head of the patient, pressure is applied to the head of the patient, and when the pressure reaches a preset set value, the auxiliary retractor piston 61 is controlled to stop moving.

In the present invention, the head fixing and disturbance preventing method further includes a self-checking operation of the main controller on the upper oil path and the lower oil path before controlling the main telescopic device piston 49 and the auxiliary telescopic device piston 61 to return to the initialization position, specifically:

the main controller 40 performs self-checking on the oil pumps and the like of the upper pressure stabilizing solenoid valve 11 of the upper auxiliary retractor, the upper oil pump 12 of the upper auxiliary retractor, the upper return solenoid valve 13 of the upper auxiliary retractor, the upper oil pump 12 of the main retractor, the upper return solenoid valve 16 of the main retractor, the upper pressure stabilizing solenoid valve 17 of the main retractor, the lower return solenoid valve 18 of the upper auxiliary retractor, the lower oil pump 19 of the upper auxiliary retractor, the lower return solenoid valve 20 of the main retractor, the lower oil pump 21 of the main retractor, the lower pressure stabilizing solenoid valve 22 of the upper auxiliary retractor, the lower pressure stabilizing solenoid valve 23 of the main retractor, the lower pressure stabilizing solenoid valve 25 of the lower auxiliary retractor, the lower oil pump 26 of the lower auxiliary retractor, the lower return solenoid valve 27 of the lower auxiliary retractor, the upper pressure stabilizing solenoid valve 29 of the lower auxiliary retractor, the upper return solenoid valve 30 of the lower auxiliary retractor, and the upper oil, judging whether the electromagnetic valve and the oil pump have faults or not;

if the fault exists, the system automatically searches the position of the fault; if there is no fault, the system proceeds to the next command, and the main controller 40 judges the spatial positions of the main retractor piston 49 and the auxiliary retractor piston 61 through the signals collected in real time by the main retractor piston position detector 52 and the auxiliary retractor piston position detector 66, and then returns the main retractor piston 49 and the auxiliary retractor piston 61 to the initialization positions.

In the present invention, the main controller 40 controls the main expansion device piston 49 in the main expansion device to return to the initial position by:

the main controller 40 controls the pressure stabilizing solenoid valve 17 on the left main telescopic device, the pressure stabilizing solenoid valve 20 on the lower main telescopic device and the pressure stabilizing solenoid valve 23 on the lower main telescopic device to be opened, the upper oil pump 12 on the main telescopic device is opened, the upper return solenoid valve 16 of the main telescopic device and the lower oil pump 21 of the main telescopic device are closed, the upper oil pump 12 on the main telescopic device works, hydraulic oil is extracted from the upper hydraulic oil tank 14, the hydraulic oil enters the main telescopic device shell 55 through the pressure stabilizing solenoid valve 17 on the main telescopic device and the upper main telescopic device oil pipe 5, and the main telescopic device piston 49 is pushed to be close to the side of the main telescopic device bracket 1 under the action of the hydraulic oil until the hydraulic oil moves to the positions of the upper limit stopper 48 of the main telescopic device piston and the lower limit stopper 39 of the main telescopic.

In the present invention, the main controller 40 controls the auxiliary pantograph piston 61 of the upper auxiliary pantograph 70 and the lower auxiliary pantograph 71 to return to the initial position by:

the main controller 40 controls the upper pressure stabilizing solenoid valve 11 of the upper auxiliary telescopic device, the lower return solenoid valve 18 of the upper auxiliary telescopic device, the lower pressure stabilizing solenoid valve 22 of the upper auxiliary telescopic device, the upper pressure stabilizing solenoid valve 29 of the lower auxiliary telescopic device, the lower pressure stabilizing solenoid valve 25 of the lower auxiliary telescopic device and the lower return solenoid valve 27 of the lower auxiliary telescopic device to be opened, simultaneously the upper oil pump 12 of the upper auxiliary telescopic device and the upper oil pump 31 of the lower auxiliary telescopic device to be opened, the upper return solenoid valve 13 of the upper auxiliary telescopic device, the upper return solenoid valve 30 of the lower auxiliary telescopic device, the lower oil pump 26 of the lower auxiliary telescopic device and the lower oil pump 19 of the upper auxiliary telescopic device to be closed, the upper oil pump 12 of the upper auxiliary telescopic device and the upper oil pump 31 of the lower auxiliary telescopic device to be operated, hydraulic oil is respectively extracted from the upper hydraulic oil tank 14 and the lower hydraulic oil tank 28, the hydraulic oil in the upper hydraulic oil tank 14 passes through the upper, entering the upper auxiliary telescoping device 70, under the action of hydraulic oil, pushing an auxiliary telescoping device piston 61 in the upper auxiliary telescoping device 70 to be close to the auxiliary telescoping device piston upper stopper 58 and the auxiliary telescoping device piston lower stopper 59 until the auxiliary telescoping device piston stopper is moved to the position of the auxiliary telescoping device piston stopper, and returning to the initial position; the hydraulic oil in the lower hydraulic oil tank 28 enters the lower auxiliary telescopic device 71 through the upper pressure stabilizing solenoid valve 29 of the lower auxiliary telescopic device and the upper oil pipe of the lower auxiliary telescopic device, and under the action of the hydraulic oil, the auxiliary telescopic device piston 61 in the lower auxiliary telescopic device 71 is pushed to be close to the upper limit stopper 58 of the auxiliary telescopic device piston and the lower limit stopper 59 of the auxiliary telescopic device piston until the auxiliary telescopic device piston moves to the position of the upper limit stopper of the auxiliary telescopic device piston, and returns to the initial position, namely four auxiliary telescopic devices in the two groups of head fixing and disturbance preventing units are restored.

In the present invention, the main controller 40 controls the movement of the main retractor piston 49 in the main retractor by:

adjusting the length of the telescopic part 34 according to the contour size of the face of the patient (as shown in fig. 11), then the main controller 40 controls the left and right main telescopic device upper pressure stabilizing solenoid valves 17, the main telescopic device upper return solenoid valves 16 and the main telescopic device lower pressure stabilizing solenoid valves 23 to be opened, simultaneously the main telescopic device lower oil pumps 21 to be opened, the main telescopic device lower return solenoid valves 20 and the main telescopic device upper oil pumps 12 to be closed, and as the main telescopic device lower oil pumps 21 work, the hydraulic oil is pumped from the upper hydraulic oil tank 14 and then enters the main telescopic device shell 55 through the main telescopic device lower pressure stabilizing solenoid valves 23 and the lower main telescopic device oil pipes 2; under the action of hydraulic oil, the main telescopic device piston 49 is pushed to be far away from the main telescopic device bracket 1, namely, the main telescopic device piston push rod 50 slowly extends until the telescopic clamping device is moved to be contacted with the head of a patient, pressure is applied to the head of the patient, when the pressure detected by the main strain gauge reaches a preset set value, the main controller 40 controls to close the main telescopic device oil-discharging pump 21, and simultaneously closes the pressure stabilizing electromagnetic valves 17 on the left main telescopic device and the right main telescopic device and the pressure stabilizing electromagnetic valves 23 under the main telescopic device, so that the oil pressure in the main telescopic device shell 55 is stabilized, and the position of the main telescopic device piston 49 is stabilized.

In the present invention, the main controller 40 controls the movement of the auxiliary pantograph piston 61 in the upper auxiliary pantograph 70 and the lower auxiliary pantograph 71 by:

the main controller 40 controls the upper pressure stabilizing solenoid valve 11 of the upper auxiliary telescopic device, the upper return-flow solenoid valve 13 of the upper auxiliary telescopic device, the lower pressure stabilizing solenoid valve 22 of the upper auxiliary telescopic device, the lower pressure stabilizing solenoid valve 25 of the lower auxiliary telescopic device, the upper pressure stabilizing solenoid valve 29 of the lower auxiliary telescopic device and the upper return-flow solenoid valve 30 of the lower auxiliary telescopic device to be opened, and simultaneously, the lower oil pump 19 of the upper auxiliary telescopic device and the lower oil pump 26 of the lower auxiliary telescopic device are opened; and the lower reflux electromagnetic valve 18 of the upper auxiliary expansion device, the lower reflux electromagnetic valve 27 of the lower auxiliary expansion device, the upper oil pump 31 of the lower auxiliary expansion device and the upper oil pump 12 of the upper auxiliary expansion device are closed, the hydraulic oil is pumped from the upper hydraulic oil tank 14 and the lower hydraulic oil tank 28 along with the opening of the lower oil pump 19 of the upper auxiliary expansion device and the lower oil pump 26 of the lower auxiliary expansion device, the hydraulic oil pumped from the upper hydraulic oil tank 14 enters the upper auxiliary expansion device 70 through the lower pressure stabilizing electromagnetic valve 22 of the upper auxiliary expansion device and the lower oil pipe 24 of the upper auxiliary expansion device, the piston push rod 62 of the auxiliary expansion device is pushed to be slowly extended under the action of the hydraulic oil, the variable radian head patch 8 at the upper section is contracted, the pressure of the piston 61 of the auxiliary expansion device on the head of the patient is detected in real time by the pressure strain gauge 32, and the hydraulic oil pumped from the lower hydraulic oil, The lower oil pipe of the lower auxiliary telescoping device enters the lower auxiliary telescoping device 71, under the action of hydraulic oil, the piston push rod 62 of the auxiliary telescoping device is pushed to slowly extend, the lower section of the variable radian head patch 8 contracts, the pressure strain gauge 32 detects the pressure of the auxiliary telescoping device piston 61 on the head of a patient in real time, when the pressure reaches a set value, the main controller 40 controls to close the lower oil pump 19 of the upper auxiliary telescoping device and the lower oil pump 26 of the lower auxiliary telescoping device, and simultaneously closes the upper pressure stabilizing solenoid valves 11 of the left upper auxiliary telescoping device and the right upper auxiliary telescoping device, the lower pressure stabilizing solenoid valves 22 of the upper auxiliary telescoping device, the lower pressure stabilizing solenoid valves 25 of the lower auxiliary telescoping device and the upper pressure stabilizing solenoid valves 29 of the lower auxiliary telescoping device, thereby stabilizing the oil pressure in the upper auxiliary telescoping device 70 and the lower auxiliary telescoping device 71, stabilizing the position of the piston 61 of the auxiliary telescoping device, and finally fixing, the head of the patient is fixed, and the expected target, namely the accurate position and posture control and adjustment of the head of the patient, is achieved, so that the eye region can be accurately operated during the operation, and the operation error caused by the slight vibration and peristalsis of the head of the patient during the ophthalmic operation is eliminated.

In the present invention, the length of the retractable member 34 is maximized or minimized to meet the size of the head of the population of our country. For adults, the upper and lower variable arc head patches 8 contract, slowly gripping about the upper and lower jaw portions of the patient's head; for children, the upper and lower variable arc head patches 8 are retracted, slowly gripping the chin and crown portions of the patient's head. Of course, the above-mentioned general position is not an absolute position, because the head shape of the human body is different.

The steps in the invention can be sequentially adjusted, combined and deleted according to actual requirements.

The units in the device of the invention can be merged, divided and deleted according to actual requirements.

Although the present invention has been disclosed in detail with reference to the accompanying drawings, it is to be understood that such description is merely illustrative of and not restrictive on the application of the present invention. The scope of the invention is defined by the appended claims and may include various modifications, adaptations and equivalents of the invention without departing from its scope and spirit.

Claims

1. An ophthalmic surgery head fixing and disturbance preventing device is characterized by comprising head fixing and disturbance preventing units which are used in pairs and respectively fix two sides of a head, wherein the head fixing and disturbance preventing units comprise a main telescopic device, an upper auxiliary telescopic device (70), a lower auxiliary telescopic device (71), a telescopic clamping device and a main controller (40),

the main telescopic device comprises a main telescopic device support (1), a main telescopic device shell (55), a main telescopic device piston (49) and a main telescopic device piston push rod (50), the main telescopic device support (1) is fixed on an operating table, the main telescopic device shell (55) is fixed on the inner side of the main telescopic device support (1), the main telescopic device piston (49) is fixedly connected with the main telescopic device piston push rod (50), the main telescopic device piston (49) is matched with the inner wall of the main telescopic device shell (55), the main telescopic device piston push rod (50) is fixedly connected with a telescopic clamping device, and the main telescopic device piston (49) moves in the main telescopic device shell (55) to drive the telescopic clamping device to be far away from or close to the head of a patient;

the upper auxiliary telescoping device (70) and the lower auxiliary telescoping device (71) are positioned at the upper side and the lower side of the main telescoping device, one end of the upper auxiliary telescoping device (70) is arranged on the main telescoping device shell (55) through the auxiliary telescoping device lower spherical kinematic pair (3), the other end of the upper auxiliary telescoping device (71) is connected with the upper section or the lower section of the telescopic clamping device through the auxiliary telescoping device upper spherical kinematic pair (7), the upper auxiliary telescoping device (70) and the lower auxiliary telescoping device (71) have the same structure and comprise an auxiliary telescoping device shell (4), an auxiliary telescoping device piston (61) and an auxiliary telescoping device piston push rod (62), the auxiliary telescoping device piston (61) and the auxiliary telescoping device piston push rod (62) are fixedly connected, the auxiliary telescoping device piston push rod (61) of the upper auxiliary telescoping device (70) and the auxiliary telescoping device piston push rod (62) of the lower auxiliary telescoping device (71) are respectively connected with the upper section and the lower section of the telescopic clamping device, the upper section and the lower section of the telescopic clamping device are driven to bend by the telescopic motion of the upper auxiliary telescopic device (70) and the lower auxiliary telescopic device (71);

the telescopic clamping device is of a sectional type structure, the upper section and the lower section are both variable radian head-shaped patches (8), a middle section (68) of the telescopic clamping device is arranged between the upper section and the lower section, and the included angle between the variable radian head-shaped patches (8) of the upper section and the lower section and the middle section (68) of the telescopic clamping device is variable under the driving of the auxiliary telescopic device;

the main controller (40) monitors the telescopic positions of the main telescopic device, the upper auxiliary telescopic device (70) and the lower auxiliary telescopic device (71), monitors the clamping force of the telescopic clamping device on the head of a patient, and controls the clamping force of the telescopic clamping device on the head of the patient by controlling the telescopic degrees of the main telescopic device, the upper auxiliary telescopic device (70) and the lower auxiliary telescopic device (71).

2. An ophthalmic surgical head fixation and anti-disturbance device according to claim 1, wherein the primary telescopic device, the upper auxiliary telescopic device (70), and the lower auxiliary telescopic device (71) perform telescopic movements by means of hydraulic oil driving, and the head fixation and anti-disturbance device is divided into an upper oil path and a lower oil path, and the upper oil path comprises an upper hydraulic oil tank (14), a primary telescopic device oil path, and an upper auxiliary telescopic device oil path;

the main telescopic device oil path comprises a lower main telescopic device oil pipe (2) and an upper main telescopic device oil pipe (5) which are respectively communicated with two ends of a main telescopic device shell (55); the upper auxiliary telescopic device oil path comprises an upper auxiliary telescopic device oil feeding pipe (10) and an upper auxiliary telescopic device oil discharging pipe (24), which are respectively communicated with two ends of an upper auxiliary telescopic device (70); hydraulic oil in the upper hydraulic oil tank (14) enters and exits the main telescopic device and the upper auxiliary telescopic device (70) through a double-way oil pipe, and bidirectional circulation of the hydraulic oil in the main telescopic device and the upper auxiliary telescopic device (70) is implemented;

the lower oil circuit comprises a lower hydraulic oil tank (28) and a lower auxiliary telescopic device oil circuit, and the upper auxiliary telescopic device oil circuit comprises a lower auxiliary telescopic device upper oil pipe and a lower auxiliary telescopic device lower oil pipe which are respectively communicated with two ends of a lower auxiliary telescopic device (71); and hydraulic oil in the lower hydraulic oil tank (28) enters and exits the lower auxiliary telescopic device (71) through a double-way oil pipe, and bidirectional circulation of the hydraulic oil in the lower auxiliary telescopic device (71) is realized.

3. An ophthalmic surgical head fixation and anti-disturbance device according to claim 2, wherein the primary telescopic device oil circuit further comprises a primary telescopic device upper oil pump (15), a primary telescopic device upper return solenoid valve (16) and a primary telescopic device upper pressure stabilizing solenoid valve (17), and a primary telescopic device lower return solenoid valve (20), a primary telescopic device lower oil pump (21) and a primary telescopic device lower pressure stabilizing solenoid valve (23), both of which are connected to a main controller (40),

the upper pressure stabilizing electromagnetic valve (17) of the main telescopic device is arranged at the position, close to the main telescopic device shell (55), of an oil pipe (5) of the upper main telescopic device, and the lower pressure stabilizing electromagnetic valve (23) of the main telescopic device is arranged at the position, close to the main telescopic device shell (55), of an oil pipe (2) of the lower main telescopic device and used for stabilizing the oil pressure in the main telescopic device shell (55) and controlling the position of the middle section (68) of the telescopic clamping device, so that the position of the head of a patient is controlled; the main telescopic device upper oil pump (15) and the main telescopic device upper return electromagnetic valve (16) are respectively connected with an upper main telescopic device oil pipe (5) through pipelines, are arranged between a main telescopic device upper pressure stabilizing electromagnetic valve (17) and an upper hydraulic oil tank (14), and are used for controlling the direction of hydraulic oil in the upper main telescopic device oil pipe (5); the main telescopic device lower return electromagnetic valve 20 and the main telescopic device lower oil pump 21 are respectively connected with the lower main telescopic device oil pipe 2 through pipelines, are arranged between the main telescopic device lower pressure stabilizing electromagnetic valve 23 and the upper hydraulic oil tank 14, and are used for controlling the direction of hydraulic oil in the lower main telescopic device oil pipe 2; a main controller (40) controls the solenoid valve and the oil pump switch to control the position of the piston of the main telescopic device housing (55).

4. An ophthalmic surgical head fixation and disturbance prevention device according to claim 2, wherein the upper auxiliary retractor oil circuit further comprises an upper auxiliary retractor upper pressure stabilizing solenoid valve (11), an upper auxiliary retractor upper oil pump (12) and an upper auxiliary retractor upper return solenoid valve (13), as well as an upper auxiliary retractor lower return solenoid valve (18), an upper auxiliary retractor lower oil pump (19) and an upper auxiliary retractor lower pressure stabilizing solenoid valve (22), both of which are connected to a main controller (40), wherein,

the upper pressure stabilizing electromagnetic valve (11) of the upper auxiliary telescopic device is arranged at the position, close to the upper auxiliary telescopic device (70), of an upper oil pipe (10) of the upper auxiliary telescopic device, the lower pressure stabilizing electromagnetic valve (22) of the upper auxiliary telescopic device is arranged at the position, close to the upper auxiliary telescopic device (70), of a lower oil pipe (24) of the upper auxiliary telescopic device, and the two electromagnetic valves are used for stabilizing oil pressure in the upper auxiliary telescopic device (70) so as to control the spatial position of the variable radian head type patch (8); the upper auxiliary telescopic device upper oil pump (12) and the upper auxiliary telescopic device upper return electromagnetic valve (13) are respectively connected with the upper auxiliary telescopic device upper oil pipe (10) through pipelines, are arranged between the upper auxiliary telescopic device upper pressure stabilizing electromagnetic valve (11) and the upper hydraulic oil tank (14), and are used for controlling the hydraulic oil direction in the upper auxiliary telescopic device upper oil pipe (10); the lower return electromagnetic valve (18) of the upper auxiliary telescopic device and the lower oil pump (19) of the upper auxiliary telescopic device are respectively connected with the lower oil pipe (24) of the upper auxiliary telescopic device through pipelines, are arranged between the lower pressure stabilizing electromagnetic valve (22) of the upper auxiliary telescopic device and the upper hydraulic oil tank (14), and are used for controlling the direction of hydraulic oil in the lower oil pipe (24) of the upper auxiliary telescopic device; the main controller (40) controls the solenoid valve and the oil pump switch to control the position of the piston of the upper auxiliary telescopic device (70).

5. An ophthalmic surgical head fixation and anti-disturbance device according to claim 2, wherein the lower auxiliary retractor oil circuit further comprises a lower auxiliary retractor lower pressure stabilizing solenoid valve (25), a lower auxiliary retractor lower oil pump (26) and a lower auxiliary retractor lower return solenoid valve (27), and a lower auxiliary retractor upper pressure stabilizing solenoid valve (29), a lower auxiliary retractor upper return solenoid valve (30) and a lower auxiliary retractor upper oil pump (31), all of which are connected to the main controller (40),

the lower pressure stabilizing electromagnetic valve (25) of the lower auxiliary telescopic device is arranged at the position, close to the lower auxiliary telescopic device (71), of a lower oil pipe of the lower auxiliary telescopic device, the upper pressure stabilizing electromagnetic valve (29) of the lower auxiliary telescopic device is arranged at the position, close to the lower auxiliary telescopic device (71), of an upper oil pipe of the lower auxiliary telescopic device, and the two electromagnetic valves are used for stabilizing the oil pressure in the lower auxiliary telescopic device (71) so as to control the space position of the variable-radian head type patch (8); the lower oil pump (26) of the lower auxiliary telescopic device and the lower return electromagnetic valve (27) of the lower auxiliary telescopic device are respectively connected with a lower oil pipe of the lower auxiliary telescopic device through pipelines, are arranged between a lower pressure stabilizing electromagnetic valve (25) of the lower auxiliary telescopic device and a lower hydraulic oil tank (28), and are used for controlling the direction of hydraulic oil in the oil pipe of the lower auxiliary telescopic device (71); an upper return electromagnetic valve (30) of the lower auxiliary telescopic device and an upper oil pump (31) of the lower auxiliary telescopic device are respectively connected with an upper oil pipe of the lower auxiliary telescopic device through pipelines, are arranged between an upper pressure stabilizing electromagnetic valve (29) of the lower auxiliary telescopic device and a lower hydraulic oil tank (28), and are used for controlling the direction of hydraulic oil in the oil pipe of the lower auxiliary telescopic device (71); the main controller (40) controls the opening and closing of the electromagnetic valve and the oil pump, and controls the position of the piston of the lower auxiliary telescopic device (71).

6. An ophthalmic surgical head fixation and anti-disturbance device according to any one of claims 1 to 5, wherein the main retractor housing (55) is formed with a lower main retractor oil port (46) and an upper main retractor oil port (51), the lower main retractor oil port (46) is close to the main retractor bracket (1) and is communicated with the lower main retractor oil tube (2); an oil port (51) of the upper main telescopic device is far away from the main telescopic device bracket (1) and is communicated with an oil pipe (5) of the upper main telescopic device.

7. An ophthalmic surgical head fixation and anti-tamper arrangement according to claim 6, wherein the end of the primary telescope housing (55) remote from the primary telescope support (1) is open ended for reciprocating telescopic movement of the primary telescope piston ram (50) within the primary telescope housing (55), and a primary telescope ram seal anchor (53) is mounted outside the open ended by a primary telescope ram seal anchor bolt (54) for sealing the primary telescope piston ram (50).

8. An ophthalmic surgical head fixation and tamper evidence as claimed in claim 6 wherein a primary retractor piston position detector (52) is mounted on the closed face of the inner open end of the primary retractor housing (55) for detecting the specific position of the primary retractor piston (49) within the primary retractor housing (55) and controlling the spatial position of the intermediate section (68) of the retractable clamping device.

9. An ophthalmic surgical head fixation and anti-perturbation method, comprising:

two groups of head fixing and disturbance preventing units are placed on two sides of the head of a patient and are fixed on an operating table through a left main telescopic device bracket and a right main telescopic device bracket (1);

the main controller (40) controls a main telescopic device piston (49) in the main telescopic device, an upper auxiliary telescopic device (70) and an auxiliary telescopic device piston (61) in a lower auxiliary telescopic device (71) to return to an initial position;

the main controller (40) controls a main telescopic device piston (49) in the main telescopic device to move until the telescopic clamping device is contacted with the head of a patient, pressure is applied to the head of the patient, and when the pressure reaches a preset set value, the main telescopic device piston (49) is controlled to stop moving;

the main controller (40) controls the auxiliary telescopic device piston (61) in the upper auxiliary telescopic device (70) and the lower auxiliary telescopic device (71) to move, the variable radian head-shaped patch (8) contracts to be in contact with the head of a patient, pressure is applied to the head of the patient, and when the pressure reaches a preset set value, the auxiliary telescopic device piston (61) is controlled to stop moving.

10. An ophthalmic surgical head fixation and tamper evidence method according to claim 9, characterized in that it further comprises a main controller self-checking the upper and lower oil circuits before controlling the primary (49) and secondary (61) pantograph pistons to return to their initial positions;

the main controller (40) is used for controlling the upper voltage stabilizing electromagnetic valve (11) of the upper auxiliary expansion device, the upper oil pump (12) of the upper auxiliary expansion device, the upper return electromagnetic valve (13) of the upper auxiliary expansion device, the upper oil pump (15) of the main expansion device, the upper return electromagnetic valve (16) of the main expansion device, the upper voltage stabilizing electromagnetic valve (17) of the main expansion device, the lower return electromagnetic valve (18) of the upper auxiliary expansion device, the lower oil pump (19) of the upper auxiliary expansion device, the lower return electromagnetic valve (20) of the main expansion device, the lower oil pump (21) of the main expansion device, the lower voltage stabilizing electromagnetic valve (22) of the upper auxiliary expansion device, the lower voltage stabilizing electromagnetic valve (23) of the main expansion device, the lower voltage stabilizing electromagnetic valve (25) of the lower auxiliary expansion device, the lower oil pump (26) of the lower auxiliary expansion device, the lower return electromagnetic, the lower auxiliary telescopic device is used for self-checking an electromagnetic valve and an oil pump such as an upper oil pump (31) and judging whether the electromagnetic valve and the oil pump have faults or not;

if the fault exists, the system automatically searches the position of the fault; if no fault exists, the system carries out the next instruction, the main controller (40) judges the spatial positions of the main telescopic device piston (49) and the auxiliary telescopic device piston (61) through signals acquired by the main telescopic device piston position detector (52) and the auxiliary telescopic device piston position detector (66) in real time, and then the main telescopic device piston (49) and the auxiliary telescopic device piston (61) return to the initial positions.