Eyelid opening device for fixing head in ophthalmologic operation and use method

Abstract

The invention provides an eyelid opening device for fixing the head in an ophthalmologic operation and a using method, the eyelid opening device comprises a head fixator and an eyelid opener, the eyelid opener comprises a mounting frame, a rotating table and two symmetrically-mounted cantilevers are rotationally mounted on the mounting frame, rotating wheels are rotationally mounted at the tail ends of the cantilevers, the rotating wheels abut against the cambered surface of the rotating table, and the rotating table is fixedly connected with the rotating table. A first electric push rod is fixedly installed at the front end of the cantilever, and the tail end of an output shaft of the first electric push rod is connected with a distraction plate used for distraction eyelids. The head fixator comprises a pillow arranged on the head of the operating bed, second electric push rods are oppositely and fixedly installed on the two sides of the pillow, and output shafts of the second electric push rods are connected with clamping plates used for clamping the head. The power mechanism can drive the rotating table to ascend while rotating, the rotating table can drive the two cantilevers to rotate slowly due to the fact that the rotating table is large in upper portion and small in lower portion, the front ends of the cantilevers are far away from each other, the opening plates are far away from each other, eyelids are opened slowly, and eyes of a patient are prevented from being damaged.

Description

Technical Field

[0001] This invention relates to an eyelid opening device, specifically to an eyelid opening device for head fixation in ophthalmic surgery and its method of use. Background Technology

[0002] Ophthalmology, short for "eye disease specialty," is a discipline that studies diseases occurring in the visual system, including the eyeball and related tissues. Ophthalmology generally studies a variety of eye diseases, including vitreous and retinal diseases, optometry, glaucoma and optic nerve disorders, and cataracts. Eyelid examination is typically conducted under natural light using observation and palpation. The main observations include: whether there are any congenital abnormalities of the eyelids, whether there are any abnormalities in the eyelid skin, whether there are any abnormalities in the position of the eyelids, and whether there are any abnormalities in the eyelid margins and eyelashes.

[0003] Currently, there are three types of eyelid openers used in hospitals. The first type is not suitable for patients with small palpebral fissures. The second type is adjustable in size, but it is prone to increasing orbital pressure. The third type has a baffle that should not be too short to ensure that it can cover most people's eyelid margins and eyelashes.

[0004] Existing head position fixation devices used in ophthalmic surgery have several drawbacks. Since ophthalmic surgeries are mostly performed under local anesthesia and the patient is awake, the head position fixation device can easily cause agitation or involuntary head turning during the procedure, thus affecting the progress of the surgery. Furthermore, prolonged surgery can cause discomfort for the patient. Additionally, medical staff may adjust the patient's head angle during the procedure, and after the adjustment, the patient may unconsciously turn their head or turn it at an excessive angle. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing an eyelid opening device and a method of use for head fixation in ophthalmic surgery. The eyelid opening device can adjust the angle and position of the eyelid opening device to adapt to different eye sizes of patients. It can fix the patient's head in multiple directions with good fixation effect, effectively prevent the patient's head from turning, improve the safety of the operation, and can be widely applied.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an eyelid-opening device for head fixation in ophthalmic surgery, characterized in that it includes a head fixator fixedly installed on the head of the operating table and eyelid openers located on both sides of the head fixator. The eyelid opener includes a mounting frame fixedly installed on the head of the operating table. A rotating platform and two symmetrically installed cantilever arms are rotatably installed on the mounting frame. The cross-section of the rotating platform is elliptical and gradually decreases in size from top to bottom, i.e., the rotating platform is "larger at the top and smaller at the bottom". A rotating wheel is rotatably installed at the end of the cantilever arm, and the rotating wheel abuts against the arc surface of the rotating platform. A first electric push rod is fixedly installed at the front end of the cantilever arm, and the output shaft end of the first electric push rod is connected to an opening plate for opening the eyelid.

[0007] The head fixation device includes a pillow mounted on the headboard of the operating table. Two electric push rods are fixedly mounted on opposite sides of the pillow. A rotating plate is hinged to the output shaft end of each of the second electric push rods. A clamping plate for holding the head is fixedly mounted on the top of the rotating plate. An airbag is provided on the opposite side of the clamping plate. A first screw is connected to the bottom of the rotating plate via a first constant force spring. The first constant force spring is a disc-shaped constant force spring. Two first screws are installed parallel to each other, located on the upper and lower sides of a third worm gear, with the same helical direction. A threaded sleeve is threaded onto each of the first screws.

[0008] The headboard is equipped with a drive mechanism for rotating the rotary table and the threaded sleeve respectively. The patient's head is secured by a head restraint. Activating the second electric push rod pushes two clamping plates closer together to clamp the patient's head. Once the clamping plates are in position, the airbag can be inflated or deflated to improve the clamping effect and comfort.

[0009] The first electric push rod is activated, and the first electric push rod extends to move the opening plate to the patient's eyelid. The opening plate is placed at the patient's eyelid. The drive mechanism is activated, and the drive mechanism drives the rotary table to rotate. The rotating rotary table pushes the rotating wheel to move, so that the two rotating wheels move closer to each other, causing the cantilever to rotate. The front ends of the cantilever move away from each other, and the two opening plates move away from each other, thus opening the patient's eyelid.

[0010] When it is necessary to adjust the angle of the patient's head, the drive mechanism is activated. The drive mechanism drives the threaded sleeve to rotate, and the rotating threaded sleeve drives the first screw to move laterally. The first screw pushes the clamping plate to rotate, allowing the patient's head to rotate.

[0011] When the patient's head turns to the left, the left clamping plate is pulled to the right by the first screw connected to it, causing it to rotate counterclockwise. The right clamping plate is also pushed to the right by the first screw connected to it, causing it to rotate counterclockwise as well, thus maintaining the clamping of the head by both clamping plates.

[0012] Preferably, a turntable is rotatably mounted on the end of the output shaft of the first electric actuator. A mounting rod is fixedly mounted on the arc surface of the turntable. A rotating seat is rotatably mounted on the top of the mounting rod. The expansion plate is fixedly connected to the rotating seat by a third constant force spring. A pressure sensor is provided between the third constant force spring and the rotating seat. The pressure sensor is used to detect the pressure on the third constant force spring, that is, the pressure exerted by the rotating seat on the expansion plate and the patient's eye socket, to prevent excessive pressure from compressing the patient's eye socket. The expansion plate can rotate with the rotating seat to further adjust the angle of the expansion plate for ease of use. An arc rack is fixedly mounted on the rotating seat. An angle gear is also rotatably mounted on the end of the output shaft of the first electric actuator. The angle gear meshes with the arc rack. A miniature servo motor for driving the angle gear to rotate is provided on the end of the output shaft of the first electric actuator.

[0013] A miniature servo motor drives an angle gear to rotate, which in turn drives a circular rack and a rotating seat to rotate, causing the mounting rod to rotate. This adjusts the angle of the mounting rod so that the opening plate can be placed close to the patient's eye socket, thus facilitating the opening of the eyelids.

[0014] Preferably, two first worm gears are rotatably mounted on the mounting bracket, a small servo motor is fixedly mounted on the mounting bracket, a first worm is fixedly connected to the end of the output shaft of the small servo motor, the first worm meshes with the first worm gears, a second constant force spring is provided on the first worm gears, and the outer end of the second constant force spring is fixedly connected to the side of the cantilever near the rotary table.

[0015] A small servo motor can drive the first worm gear to rotate, which in turn drives the two first worm wheels to rotate, causing the second constant force spring to coil or unwind, thereby pulling the cantilever to rotate. This causes the front ends of the cantilever to move closer together, reducing the pressure of the expansion plate on the patient's eye socket and preventing damage to the patient's eyes.

[0016] Preferably, a main shaft is vertically rotatably mounted on the mounting bracket. The main shaft is inserted into the rotary table, and the bottom end of the main shaft is connected to the drive mechanism. A variable diameter spline is provided in the middle of the main shaft. The variable diameter spline is used to connect and disconnect the main shaft from the rotary table. When the main shaft is connected to the rotary table, the main shaft can drive the rotary table to rotate. A third electric push rod is vertically fixedly mounted on the mounting bracket. A push plate is fixedly mounted on the end of the output shaft of the third electric push rod. The top surface of the push plate is close to the bottom surface of the rotary table. The cross-section of the rotary table gradually decreases from top to bottom, that is, the rotary table is "larger at the top and smaller at the bottom".

[0017] The third electric push rod can extend and retract to raise and lower the rotating platform. When the rotating platform is raised and lowered, the two wheels move closer to each other, causing the cantilever to rotate. This can be used to finely adjust the distance at the front end of the cantilever to accommodate different patients' eye sizes.

[0018] Preferably, a first bevel gear is fixedly installed at the top of the main shaft, and a first rotating shaft and two second rotating shafts are horizontally rotatably installed on the mounting bracket. The first rotating shaft and the two second rotating shafts are connected by a drive. Two first pulleys are fixedly installed on the first rotating shaft, and two second pulleys are fixedly installed on each of the two second rotating shafts. The first pulleys and the second pulleys are connected by a belt drive. The main shaft drives the first rotating shaft to rotate, and the rotation of the first rotating shaft can drive the two second rotating shafts to rotate synchronously and in the same direction.

[0019] A second bevel gear meshing with a first bevel gear is fixedly installed on the first rotating shaft. The main shaft can drive the first rotating shaft to rotate. A second worm gear is fixedly connected to the second rotating shaft. A second screw is vertically rotatably installed on the mounting bracket. A threaded disc is threaded onto the second screw. A second worm wheel meshing with the second worm gear is fixedly installed on the threaded disc. A first lifting disc is fixedly installed at the bottom end of the second screw. A second lifting disc is fixedly connected to the top end of the rotary table. The first lifting disc and the second lifting disc are engaged. The first lifting disc is a disc. An annular groove is provided on the periphery of the second lifting disc. The edge of the disc is engaged in the annular groove. That is, the engagement of the first lifting disc and the second lifting disc does not affect the rotation of the rotary table.

[0020] The second rotating shaft drives the second worm gear to rotate, which in turn drives the second worm wheel and the threaded disc to rotate. This causes the second screw to extend and retract relative to the threaded disc, which in turn drives the first lifting disc to rise and fall. The first lifting disc then drives the second lifting disc and the rotary table to rise and fall.

[0021] Preferably, the main shaft includes a first main shaft, a second main shaft, and a connecting shaft for connecting the first main shaft and the second main shaft. The variable diameter spline includes a first gear rotatably mounted on the connecting shaft. A plurality of limiting slide grooves are uniformly fixedly mounted on the connecting shaft. The limiting slide grooves are radially arranged. A slide bar is slidably mounted in the limiting slide groove. An arc plate is fixedly connected to the outer end of the slide bar. A spline bar for connecting with the rotary table is vertically fixedly mounted on the arc plate. A plurality of spline grooves that mate with the spline bar are provided inside the rotary table.

[0022] A spline motor is provided on one side of the main shaft. A second gear that meshes with the first gear is fixedly installed on the end of the output shaft of the spline motor. A slider is fixedly installed on the end of the slide bar near the main shaft. Multiple curved grooves are formed on the first gear. The slider is slidably connected to the curved grooves.

[0023] When the first gear rotates clockwise, the slider slides from the inside to the outside in the curved groove, causing the slide bar to slide from the inside to the outside in the limiting groove, thereby pushing the spline bar into the spline groove of the rotary table; when the first gear rotates counterclockwise, the slider slides from the outside to the inside in the curved groove, causing the slide bar to slide from the outside to the inside in the limiting groove, thereby causing the spline bar to disengage from the spline groove of the rotary table.

[0024] Preferably, the drive mechanism includes a drive motor, a third bevel gear is fixedly mounted on the output shaft of the drive motor, two transmission shafts are rotatably mounted on both sides of the drive motor on the operating table, a fourth bevel gear and a fifth bevel gear are fixedly mounted at both ends of the transmission shaft, both fourth bevel gears mesh with the third bevel gear, a main shaft drive shaft is rotatably mounted on the operating table, a sixth bevel gear meshing with the fifth bevel gear is fixedly mounted on the main shaft drive shaft, and the main shaft drive shaft is connected to the main shaft via belt drive.

[0025] The active motor drives the third bevel gear to rotate, which in turn drives the fourth bevel gear and the drive shaft to rotate. The fifth bevel gear on the two drive shafts rotates, which in turn drives the sixth bevel gear and the main shaft drive shaft to rotate. The main shaft drive shaft drives the main shaft to rotate via a belt, providing power to the two eyelid openers.

[0026] Preferably, a third worm gear is connected to the output shaft of the active motor via a sliding spline sleeve. An external spline is provided on one end of the output shaft of the active motor and the third worm gear. An internal spline is provided on the sliding spline sleeve, and the external and internal splines cooperate. A dovetail groove guide rail is fixedly installed on the operating table. A dovetail groove slider is slidably installed within the dovetail groove guide rail. The dovetail groove slider and the sliding spline sleeve are fixedly connected via a connecting rod. A guide rail motor for driving the dovetail groove slider to translate is provided within the dovetail groove guide rail.

[0027] The guide rail motor can drive the lead screw to rotate, and the lead screw drives the lead screw nut, which is fixedly connected to the dovetail slide block, to move laterally, so that the dovetail slide block moves laterally. Other mechanical transmission methods can also be adopted.

[0028] The horizontal movement of the dovetail slide block can drive the sliding spline sleeve to move, thereby connecting and disconnecting the output shaft of the active motor from the third worm gear.

[0029] A third worm gear is fixedly installed on the threaded sleeve, and the third worm gear meshes with the third worm.

[0030] When the output shaft of the active motor is disconnected from the third worm, the output shaft of the active motor cannot drive the third worm to rotate. When the output shaft of the active motor is connected to the third worm, the output shaft of the active motor can drive the third worm to rotate, and the third worm drives the third worm wheel and the threaded sleeve to rotate. The threaded sleeve provides power to the head retainer.

[0031] Preferably, the head fixation device further includes a top head support plate and a neck support plate disposed on the other two sides of the pillow. The bottom ends of the top head support plate and the neck support plate are respectively connected to electric push rods for pushing the top head support plate and the neck support plate to rise and fall. A top head limiting plate is also disposed on the upper side of the top head support plate. The top head limiting plate is connected to an electric push rod for pushing the top head limiting plate to move laterally. Airbags are disposed on the top head support plate, the neck support plate and the top head limiting plate.

[0032] The head support plate can be pressed against the bottom of the patient's head for support, the neck support plate can be pressed against the patient's neck for restraint, and the head restraint plate can be pressed against the top of the patient's head for restraint. The airbags on the head support plate, neck support plate and head restraint plate "wrap" the patient's head in multiple directions and angles to fix the patient's head.

[0033] A method of using a head-fixing eyelid-opening device in ophthalmic surgery, characterized by comprising the following steps: S1: Guide the patient to lie on the hospital bed with their head on a pillow.

[0034] S2: The patient's head is fixed by the head fixation device. The second electric push rod is activated, which pushes the two clamping plates closer together to clamp the patient's head. Activate the electric push rods connected to the head support, neck support, and head limiting plate to adjust their positions and inflate the airbag to fix the patient's head in multiple directions and angles.

[0035] S3: Open the patient's eyelids with the eyelid opener, activate the first electric push rod, the first electric push rod extends and drives the opening plate to move to the patient's eyelid, and place the opening plate at the patient's eyelid; The micro servo motor is activated, which drives the angle gear to rotate. The angle gear drives the arc rack and the rotating seat to rotate, causing the mounting rod to rotate. The angle of the mounting rod is adjusted so that the opening plate can be close to the patient's eye socket, thus facilitating the opening of the eyelids.

[0036] When the spline motor is started, the first gear rotates clockwise, and the slider slides from the inside to the outside in the curved groove, which in turn drives the slide bar to slide from the inside to the outside in the limiting groove. This pushes the spline bar into the spline groove of the rotary table, so that the main shaft and the rotary table complete the transmission connection.

[0037] When performing eyelid incision on the left eye, the spline motor on the left is activated, connecting the spindle to the rotary table on the left. When performing eyelid incision on the right eye, the spline motor on the right is activated, connecting the spindle to the rotary table on the right.

[0038] The active motor is started, which drives the third bevel gear to rotate. The third bevel gear drives the fourth bevel gear and the drive shaft to rotate. The fifth bevel gear on the two drive shafts rotates, which drives the sixth bevel gear and the main shaft drive shaft to rotate. The main shaft drive shaft drives the main shaft to rotate via a belt. The main shaft drives the rotary table to rotate. The rotating rotary table pushes the rotating wheel to move, so that the two rotating wheels move closer to each other, causing the cantilever to rotate. The front ends of the cantilever move away from each other, and the two opening plates move away from each other, opening the patient's eyelids.

[0039] While the cantilever is rotating, a small servo motor is started. The small servo motor can drive the first worm gear to rotate, which in turn drives the two first worm wheels to rotate, tightening the second constant force spring and maintaining the stability of the cantilever.

[0040] Simultaneously, the main shaft drives the first rotating shaft to rotate, which in turn drives the two second rotating shafts to rotate synchronously in the same direction. The second rotating shaft drives the second worm gear to rotate, which in turn drives the second worm wheel and the threaded disc to rotate, causing the second screw to extend and retract relative to the threaded disc, thereby driving the first lifting plate to rise and fall. The first lifting plate drives the second lifting plate and the rotary table to rise and fall. The second electric push rod at the bottom of the rotary table synchronously pushes the rotary table to rise and fall stably. When the rotary table rises and falls, the two rotating wheels move closer to each other, causing the cantilever to rotate.

[0041] That is, by spiraling upwards on the rotating platform, the cantilever rotates, causing the opening plates to slowly move away from each other, thus slowly opening the patient's eyelids.

[0042] After the eyelids are fully opened, disconnect the main shaft from the rotary table, and then ophthalmic surgery can be performed.

[0043] S4: When it is necessary to adjust the patient's head angle, the surgery is stopped.

[0044] Start the guide rail motor, which drives the lead screw to rotate. The lead screw drives the lead screw nut, which is fixedly connected to the dovetail slide block, to move laterally. This movement of the dovetail slide block can drive the sliding spline sleeve to move, thus connecting the output shaft of the active motor with the third worm gear.

[0045] The active motor of the drive mechanism is started, which drives the third worm gear to rotate. The third worm gear drives the third worm wheel and the threaded sleeve to rotate. The rotating threaded sleeve drives the first screw to move laterally. The first screw pushes the clamping plate to rotate, and the patient's head rotates.

[0046] After the head angle adjustment is completed, the guide rail motor is started. The guide rail motor drives the lead screw to rotate in the opposite direction. The lead screw drives the lead screw nut, which is fixedly connected to the dovetail slide block, to move laterally in the opposite direction. This lateral movement of the dovetail slide block can drive the sliding spline sleeve to move in the opposite direction, thus disconnecting the output shaft of the active motor from the third worm gear. Because the worm gear has self-locking properties, the clamping plate can remain stable.

[0047] Compared with the prior art, the present invention has the following advantages: The power mechanism of this invention provides power to the main shafts of the two eyelid openers through a bevel gear set. It can drive the variable-diameter spline on the main shaft to move through a spline motor, so that the main shaft is connected to the rotary table. Thus, the main shaft drives the rotary table to rotate, and the second screw drives the first lifting plate to rise and fall. The first lifting plate drives the second lifting plate and the rotary table to rise and fall. Since the rotary table is larger at the top and smaller at the bottom, the rotation and rise of the rotary table causes the two cantilever arms to rotate. The front ends of the cantilever arms move away from each other, so that the opening plates on the front ends of the cantilever arms move away from each other, slowly opening the eyelids and preventing damage to the patient's eyes. A second electric push rod is also provided between the cantilever arms and the opening plates, which can push the opening plates to move to the patient's eye socket. The angle of the opening plates can also be adjusted by the arc rack and angle gear on the output shaft of the second electric push rod to facilitate opening the patient's eyelids.

[0048] This invention includes a constant force spring between the support plate and the rotating base, and a pressure sensor between the constant force spring and the rotating base to detect the pressure on the third constant force spring, i.e., the pressure exerted by the turntable on the support plate and the patient's eye socket. A first worm gear is rotatably mounted on the mounting frame, and a constant force spring for pulling the two cantilever arms is mounted on the first worm gear. The first worm gear can be driven to rotate by a small servo motor. The first worm gear drives the constant force spring to coil or unwind, causing the cantilever arms to rotate, thereby allowing the support plates on the cantilever arms to move closer to each other, reducing the pressure exerted on the patient's eye socket and preventing excessive pressure from compressing the patient's eye socket.

[0049] The power mechanism of this invention provides power to the clamping plate of the head fixation device through a worm gear mechanism. The worm and the output shaft of the power mechanism are connected by a sliding spline sleeve. The clamping plate can be driven to rotate by the power mechanism, which in turn drives the patient's head to rotate and adjust the angle of the patient's head to facilitate ophthalmic surgery. After the head angle is adjusted, the transmission connection between the power mechanism and the head fixation device can be disconnected. The self-locking property of the worm gear mechanism maintains the clamping plate's grip on the patient's head. Furthermore, the airbags on the top support plate, neck support plate, and top limiting plate provide multi-directional and multi-angle "wrapping" of the patient's head, thus fixing the patient's head effectively.

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of the present invention.

[0052] Figure 2 This is an installation diagram of the present invention.

[0053] Figure 3 This is a schematic diagram of the usage state of the present invention.

[0054] Figure 4 This is a structural schematic diagram of the present invention from another perspective.

[0055] Figure 5 This is a schematic diagram of the eyelid opener in this invention.

[0056] Figure 6 This is a schematic diagram of the eyelid opener from another angle in this invention.

[0057] Figure 7 This is a schematic diagram of the main shaft in this invention.

[0058] Figure 8 This is a schematic diagram of the variable diameter spline in this invention.

[0059] Figure 9 This is a schematic diagram of the connection structure between the first electric push rod and the expansion plate in this invention.

[0060] Figure 10 This is a schematic diagram of the head fixation device in this invention.

[0061] Figure 11 This is a schematic diagram of the head fixation device from another angle in this invention.

[0062] Figure 12 This is a schematic diagram of the connection structure of the sliding spline sleeve in this invention.

[0063] Explanation of reference numerals in the attached figures: Detailed Implementation

[0064] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0065] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0066] like Figures 1-12As shown, the present invention provides an eyelid-opening device for head fixation in ophthalmic surgery, including a head fixator 1 fixedly installed on the head of an operating table and eyelid openers 2 located on both sides of the head fixator. The eyelid opener 2 includes a mounting frame 201 fixedly installed on the head of the operating table. A rotating platform 202 and two symmetrically installed cantilever arms 203 are rotatably mounted on the mounting frame 201. The cross-section of the rotating platform 202 is elliptical and gradually decreases in size from top to bottom, i.e., the rotating platform is "larger at the top and smaller at the bottom". A rotating wheel 2031 is rotatably mounted at the end of the cantilever arm 203. The rotating wheel 2031 abuts against the arc surface of the rotating platform 202. A first electric push rod 2032 is fixedly installed at the front end of the cantilever arm 203. The output shaft end of the first electric push rod 2032 is connected to an opening plate 206 for opening the eyelid.

[0067] The head fixation device 1 includes a pillow set on the head of the operating table. Second electric push rods 101 are fixedly installed on both sides of the pillow. A rotating plate 1011 is hinged to the end of the output shaft of the second electric push rod 101. A clamping plate 102 for clamping the head is fixedly installed on the top of the rotating plate 1011. An airbag is provided on the opposite side of the clamping plate 102. The bottom end of the rotating plate 1011 is connected to a first screw 1013 through a first constant force spring 1012. The first constant force spring 1012 is a disc-shaped constant force spring. The two first screws 1013 are installed in parallel, located on the upper and lower sides of the third worm gear 303, and the spiral direction is the same. A threaded sleeve 1014 is threaded onto the first screw 1013.

[0068] The headstock is equipped with a drive mechanism 3 for driving the rotary table 202 and the threaded sleeve 1014 to rotate respectively.

[0069] The patient's head is fixed by the head fixation device 1. The second electric push rod 101 is activated, which pushes the two clamping plates 102 closer together to clamp the patient's head. After the clamping plates 102 are in place, the airbag can be inflated or deflated to improve the clamping effect and comfort.

[0070] The first electric push rod 2032 is activated, and the first electric push rod 2032 extends to move the opening plate 206 to the patient's eyelid. The opening plate 206 is placed at the patient's eyelid. The drive mechanism 3 is activated, and the drive mechanism 3 drives the rotary table 202 to rotate. The rotating rotary table 202 pushes the rotating wheel 2031 to move, so that the two rotating wheels 2031 move closer to each other, so that the cantilever 203 rotates and the front ends of the cantilever 203 move away from each other. The two opening plates 206 move away from each other, thus opening the patient's eyelid.

[0071] When it is necessary to adjust the angle of the patient's head, the drive mechanism 3 is activated. The drive mechanism 3 drives the threaded sleeve 1014 to rotate. The rotating threaded sleeve 1014 drives the first screw 1013 to move laterally. The first screw 1013 pushes the clamping plate 102 to rotate, so that the patient's head can rotate.

[0072] When the patient's head turns to the left, the left clamping plate 102 is pulled to the right by the connected first screw 1013, causing it to rotate counterclockwise. The right clamping plate 102 is pushed to the right by the connected first screw 1013, also rotating counterclockwise, thus maintaining the clamping of the head by both clamping plates 102.

[0073] In this embodiment, a turntable 2033 is rotatably mounted on the end of the output shaft of the first electric push rod 2032. A mounting rod 2034 is fixedly mounted on the arc surface of the turntable 2033. A rotating seat 2035 is rotatably mounted on the top of the mounting rod 2034. The expansion plate 206 is fixedly connected to the rotating seat 2035 by a third constant force spring. A pressure sensor is provided between the third constant force spring and the rotating seat 2035. The pressure sensor is used to detect the pressure on the third constant force spring, i.e., the pressure exerted by the rotating seat 2035 on the expansion plate 206 and the patient's eye socket. The applied pressure is designed to prevent excessive pressure from compressing the patient's eye socket. The expansion plate 206 can rotate with the rotating seat 2035 to further adjust the angle of the expansion plate 206 for ease of use. An arc rack 2036 is fixedly installed on the rotating seat 2035. An angle gear 2037 is also rotatably installed on the end of the output shaft of the first electric push rod 2032. The angle gear 2037 meshes with the arc rack 2036. A miniature servo motor 2038 for driving the angle gear 2037 to rotate is provided on the end of the output shaft of the first electric push rod 2032.

[0074] The micro servo motor 2038 drives the angle gear 2037 to rotate, and the angle gear 2037 drives the arc rack 2036 and the rotating seat 2035 to rotate, causing the mounting rod 2034 to rotate. The angle of the mounting rod 2034 is adjusted so that the opening plate 206 can be close to the patient's eye socket, thereby facilitating the opening of the eyelid.

[0075] In this embodiment, two first worm gears 2011 are rotatably mounted on the mounting bracket 201. A small servo motor 2012 is fixedly mounted on the mounting bracket 201. A first worm 2013 is fixedly connected to the end of the output shaft of the small servo motor 2012. The first worm 2013 meshes with the first worm gears 2011. A second constant force spring 2014 is provided on the first worm gear 2011. The outer end of the second constant force spring 2014 is fixedly connected to the side of the cantilever 203 near the rotary table 202.

[0076] The small servo motor 2012 can drive the first worm gear 2013 to rotate, which in turn drives the two first worm wheels 2011 to rotate, causing the second constant force spring 2014 to coil or unwind, thereby pulling the cantilever 203 to rotate, so that the front ends of the cantilever 203 move closer to each other, reducing the pressure of the support plate 206 on the patient's eye socket and avoiding damage to the patient's eyes.

[0077] In this embodiment, a main shaft 204 is vertically rotatably mounted on the mounting bracket 201. The main shaft 204 is inserted into the rotary table 202. The bottom end of the main shaft 204 is connected to the drive mechanism 3. A variable diameter spline 2041 is provided in the middle of the main shaft 204. The variable diameter spline 2041 is used to connect and disconnect the main shaft 204 and the rotary table 202. When the main shaft 204 is connected to the rotary table 202, the main shaft 204 can drive the rotary table 202 to rotate. A third electric push rod 2015 is vertically fixedly mounted on the mounting bracket 201. A push plate 2016 is fixedly mounted on the end of the output shaft of the third electric push rod 2015. The top surface of the push plate 2016 is close to the bottom surface of the rotary table 202. The cross-section of the rotary table 202 gradually decreases from top to bottom, that is, the rotary table 202 is "larger at the top and smaller at the bottom".

[0078] The third electric push rod 2015 can extend and retract to push the rotary table 202 up and down. When the rotary table 202 is raised or lowered, the two rotating wheels 2031 move closer to each other, causing the cantilever 203 to rotate. This can be used to finely adjust the distance at the front end of the cantilever 203 to accommodate different patients' eye sizes.

[0079] In this embodiment, a first bevel gear 2042 is fixedly installed at the top of the main shaft 204. A first rotating shaft 2017 and two second rotating shafts 2018 are horizontally rotatably mounted on the mounting bracket 201. The first rotating shaft 2017 and the two second rotating shafts 2018 are connected by a drive. Two first pulleys are fixedly installed on the first rotating shaft 2017, and two second pulleys are fixedly installed on each of the two second rotating shafts 2018. The first pulleys and the second pulleys are connected by a belt drive. The main shaft 204 drives the first rotating shaft 2017 to rotate, and the rotation of the first rotating shaft 2017 can drive the two second rotating shafts 2018 to rotate synchronously and in the same direction.

[0080] A second bevel gear 20171, meshing with a first bevel gear 2042, is fixedly mounted on the first rotating shaft 2017. The main shaft 204 can drive the first rotating shaft 2017 to rotate. A second worm gear 20181 is fixedly connected to the second rotating shaft 2018. A second screw 205 is vertically rotatably mounted on the mounting bracket 201. A threaded disc is threaded onto the second screw 205, and a second worm wheel 205, meshing with the second worm gear 20181, is fixedly mounted on the threaded disc. 1. A first lifting plate 2052 is fixedly installed at the bottom end of the second screw 205, and a second lifting plate 2021 is fixedly connected to the top end of the rotary table 202. The first lifting plate 2052 and the second lifting plate 2021 are engaged. The first lifting plate 2052 is a disc, and the second lifting plate 2021 is provided with an annular groove on its periphery. The edge of the disc is engaged in the annular groove, that is, the engagement of the first lifting plate 2052 and the second lifting plate 2021 does not affect the rotation of the rotary table 202.

[0081] The second rotating shaft 2018 drives the second worm gear 20181 to rotate, and the second worm gear 20181 drives the second worm wheel 2051 and the threaded disc to rotate, causing the second screw 205 to extend and retract relative to the threaded disc, thereby driving the first lifting plate 2052 to rise and fall. The first lifting plate 2052 drives the second lifting plate 2021 and the rotary table 202 to rise and fall.

[0082] In this embodiment, the main shaft 204 includes a first main shaft 2043, a second main shaft 2044, and a connecting shaft 2045 for connecting the first main shaft 2043 and the second main shaft 2044. The variable diameter spline 2041 includes a first gear 20411 rotatably mounted on the connecting shaft 2045. A plurality of limiting slide grooves 20451 are uniformly fixedly mounted on the connecting shaft 2045. The limiting slide grooves 20451 are radial. A slide bar 20452 is slidably mounted in the limiting slide groove 20451. An arc plate 20453 is fixedly connected to the outer end of the slide bar 20452. A spline bar 20454 for connecting with the rotary table 202 is vertically fixedly mounted on the arc plate 20453. A plurality of spline grooves that cooperate with the spline bar 20454 are provided in the rotary table 202.

[0083] A spline motor 2046 is provided on one side of the main shaft 204. A second gear 20461 that meshes with the first gear 20411 is fixedly installed on the end of the output shaft of the spline motor 2046. A slider is fixedly installed on one end of the slide bar 20452 near the main shaft 204. Multiple curved grooves 20412 are formed on the first gear 20411. The slider is slidably connected to the curved grooves 20412.

[0084] When the first gear 20411 rotates clockwise, the slider slides from the inside to the outside in the curved groove 20412, causing the slide bar 20452 to slide from the inside to the outside in the limiting groove 20451, thereby pushing the spline bar 20454 into the spline groove of the rotary table 202; when the first gear 20411 rotates counterclockwise, the slider slides from the outside to the inside in the curved groove 20412, causing the slide bar 20452 to slide from the outside to the inside in the limiting groove 20451, thereby causing the spline bar 20454 to disengage from the spline groove of the rotary table 202.

[0085] In this embodiment, the drive mechanism 3 includes an active motor 301. A third bevel gear 3011 is fixedly mounted on the output shaft of the active motor 301. Two transmission shafts 3012 are rotatably mounted on both sides of the active motor 301 on the operating table. A fourth bevel gear 3013 and a fifth bevel gear 3014 are fixedly mounted at both ends of the transmission shaft 3012, respectively. Both fourth bevel gears 3013 mesh with the third bevel gear 3011. A main shaft transmission shaft 3015 is rotatably mounted on the operating table. A sixth bevel gear 3016 meshes with the fifth bevel gear 3014 on the main shaft transmission shaft 3015. The main shaft transmission shaft 3015 is connected to the main shaft 204 via a belt drive.

[0086] The active motor 301 drives the third bevel gear 3011 to rotate, which in turn drives the fourth bevel gear 3013 and the transmission shaft 3012 to rotate. The fifth bevel gear 3014 on the two transmission shafts 3012 rotates, which in turn drives the sixth bevel gear 3016 and the main shaft transmission shaft 3015 to rotate. The main shaft transmission shaft 3015 drives the main shaft 204 to rotate via a belt, providing power to the two eyelid openers 2.

[0087] In this embodiment, a third worm gear 303 is connected to the output shaft of the active motor 301 via a sliding spline sleeve 302. An external spline is provided on one end of the output shaft of the active motor 301 and one end of the third worm gear 303. An internal spline is provided on the sliding spline sleeve 302, and the external spline and internal spline cooperate. A dovetail groove guide rail 304 is fixedly installed on the operating table. A dovetail groove slider 3041 is slidably installed inside the dovetail groove guide rail 304. The dovetail groove slider 3041 and the sliding spline sleeve 302 are fixedly connected via a connecting rod. A guide rail motor 305 is provided inside the dovetail groove guide rail 304 for driving the dovetail groove slider 3041 to translate.

[0088] The guide rail motor 305 can drive the lead screw to rotate, and the lead screw drives the lead screw nut, which is fixedly connected to the dovetail slide block 3041, to move laterally, so that the dovetail slide block 3041 moves laterally. Other mechanical transmission methods can also be adopted.

[0089] The dovetail groove slider 3041 can move laterally to drive the sliding spline sleeve 302 to move, thereby connecting and disconnecting the output shaft of the active motor 301 from the third worm gear 303.

[0090] A third worm gear 10141 is fixedly installed on the threaded sleeve 1014, and the third worm gear 10141 meshes with the third worm 303.

[0091] When the output shaft of the active motor 301 is disconnected from the third worm gear 303, the output shaft of the active motor 301 cannot drive the third worm gear 303 to rotate. When the output shaft of the active motor 301 is connected to the third worm gear 303, the output shaft of the active motor 301 can drive the third worm gear 303 to rotate, and the third worm gear 303 drives the third worm wheel 10141 and the threaded sleeve 1014 to rotate, and the threaded sleeve 1014 provides power to the head retainer 1.

[0092] In this embodiment, the head fixation device 1 further includes a top support plate 103 and a neck support plate 104 disposed on the other two sides of the pillow. The bottom ends of the top support plate 103 and the neck support plate 104 are respectively connected to electric push rods for pushing the top support plate 103 and the neck support plate 104 to rise and fall. A top limiting plate 105 is also disposed on the upper side of the top support plate 103. The top limiting plate 105 is connected to an electric push rod for pushing the top limiting plate 105 to move laterally. Airbags are disposed on the top support plate 103, the neck support plate 104 and the top limiting plate 105.

[0093] The head support plate 103 can be pressed against the bottom of the patient's head for support, the neck support plate 104 can be pressed against the patient's neck for restraint, and the head restraint plate 105 can be pressed against the top of the patient's head for restraint. The airbags on the head support plate 103, neck support plate 104 and head restraint plate 105 "wrap" the patient's head in multiple directions and angles to fix the patient's head.

[0094] A method for using a head-fixing eyelid-opening device in ophthalmic surgery includes the following steps: S1: Guide the patient to lie on the hospital bed with their head on a pillow.

[0095] S2: Fix the patient's head with the head fixator 1, activate the second electric push rod 101, the second electric push rod 101 pushes the two clamping plates 102 closer to each other, clamping the patient's head; Activate the electric push rods connected to the head support plate 103, neck support plate 104 and head limiting plate 105, adjust the positions of the head support plate 103, neck support plate 104 and head limiting plate 105, and inflate the airbag to fix the patient's head in multiple directions and angles.

[0096] S3: Open the patient's eyelids using the eyelid opener 2, activate the first electric push rod 2032, the first electric push rod 2032 extends and drives the opening plate 206 to move to the patient's eyelid, and place the opening plate 206 at the patient's eyelid. Start the micro servo motor 2038, which drives the angle gear 2037 to rotate. The angle gear 2037 drives the arc rack 2036 and the rotating seat 2035 to rotate, causing the mounting rod 2034 to rotate. Adjust the angle of the mounting rod 2034 so that the opening plate 206 can be close to the patient's eye socket, thereby facilitating the opening of the eyelid.

[0097] When the spline motor 2046 is started, the first gear 20411 rotates clockwise driven by the spline motor 2046. The slider slides from the inside to the outside in the curved groove 20412, which drives the slide bar 20452 to slide from the inside to the outside in the limiting slide groove 20451. This pushes the spline bar 20454 into the spline groove of the rotary table 202, so that the main shaft 204 and the rotary table 202 complete the transmission connection.

[0098] When performing eyelid surgery on the left eye, the spline motor 2046 on the left side is activated, so that the main shaft 204 and the rotary table 202 on the left side are connected in a transmission manner; when performing eyelid surgery on the right eye, the spline motor 2046 on the right side is activated, so that the main shaft 204 and the rotary table 202 on the right side are connected in a transmission manner.

[0099] The active motor 301 is started, which drives the third bevel gear 3011 to rotate. The third bevel gear 3011 drives the fourth bevel gear 3013 and the transmission shaft 3012 to rotate. The fifth bevel gear 3014 on the two transmission shafts 3012 rotates, which drives the sixth bevel gear 3016 and the main shaft transmission shaft 3015 to rotate. The main shaft transmission shaft 3015 drives the main shaft 204 to rotate via a belt. The main shaft 204 drives the rotary table 202 to rotate. The rotating rotary table 202 pushes the rotating wheel 2031 to move, so that the two rotating wheels 2031 move closer to each other, causing the cantilever 203 to rotate. The front ends of the cantilever 203 move away from each other, and the two opening plates 206 move away from each other, opening the patient's eyelids.

[0100] While the cantilever 203 rotates, the small servo motor 2012 is started. The small servo motor 2012 can drive the first worm gear 2013 to rotate, which in turn drives the two first worm wheels 2011 to rotate, tightening the second constant force spring 2014 and maintaining the stability of the cantilever 203.

[0101] Simultaneously, the main shaft 204 drives the first rotating shaft 2017 to rotate. The rotation of the first rotating shaft 2017 can drive the two second rotating shafts 2018 to rotate synchronously and in the same direction. The second rotating shafts 2018 drive the second worm gear 20181 to rotate. The second worm gear 20181 drives the second worm wheel 2051 and the threaded disc to rotate, causing the second screw 205 to extend and retract relative to the threaded disc, driving the first lifting plate 2052 to rise and fall. The first lifting plate 2052 drives the second lifting plate 2021 and the rotary table 202 to rise and fall. The third electric push rod 2015 set at the bottom of the rotary table 202 synchronously pushes the rotary table 202 to rise and fall stably. When the rotary table 202 rises and falls, the two rotating wheels 2031 move closer to each other, causing the cantilever 203 to rotate.

[0102] That is, the spiral ascent of the rotating platform 202 drives the cantilever 203 to rotate, causing the opening plates 206 to slowly move away from each other, thus slowly opening the patient's eyelids.

[0103] After the eyelids are fully opened, disconnect the main shaft 204 from the rotary table 202, and then ophthalmic surgery can be performed.

[0104] S4: When it is necessary to adjust the patient's head angle, the surgery is stopped.

[0105] Start the guide rail motor 305, which drives the lead screw to rotate. The lead screw drives the lead screw nut, which is fixedly connected to the dovetail slide block 3041, to move laterally. The lateral movement of the dovetail slide block 3041 can drive the sliding spline sleeve 302 to move, thereby realizing the connection between the output shaft of the active motor 301 and the third worm gear 303.

[0106] The active motor 301 of the drive mechanism 3 is started. The active motor 301 drives the third worm gear 303 to rotate. The third worm gear 303 drives the third worm wheel 10141 and the threaded sleeve 1014 to rotate. The rotating threaded sleeve 1014 drives the first screw 1013 to move laterally. The first screw 1013 pushes the clamping plate 102 to rotate, and the patient's head rotates.

[0107] After the head angle adjustment is completed, the guide rail motor 305 is started. The guide rail motor 305 drives the lead screw to rotate in the opposite direction. The lead screw drives the lead screw nut, which is fixedly connected to the dovetail slide block 3041, to move laterally in the opposite direction. This lateral movement of the dovetail slide block 3041 can drive the sliding spline sleeve 302 to move in the opposite direction, thereby disconnecting the output shaft of the active motor 301 from the third worm gear 303. Because the worm gear has self-locking properties, the clamping plate 102 can remain stable.

[0108] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, alterations, and equivalent changes made to the above embodiments based on the inventive essence shall still fall within the protection scope of the present invention.

Claims

1. A head-fixing eyelid-opening device for ophthalmic surgery, characterized in that, The device includes a head fixation device (1) fixedly installed on the head of the operating table and eyelid openers (2) located on both sides of the head fixation device. The eyelid opener (2) includes a mounting frame (201) fixedly installed on the head of the operating table. A rotating platform (202) and two symmetrically installed cantilever arms (203) are rotatably installed on the mounting frame (201). The rotating platform (202) has an elliptical cross-section. A rotating wheel (2031) is rotatably installed at the end of the cantilever arm (203). The rotating wheel (2031) abuts against the arc surface of the rotating platform (202). A first electric push rod (2032) is fixedly installed at the front end of the cantilever arm (203). The output shaft end of the first electric push rod (2032) is connected to an opening plate (206) for opening the eyelid. The head fixation device (1) includes a pillow set on the head of the operating table. A second electric push rod (101) is fixedly installed on both sides of the pillow. A rotating plate (1011) is hinged to the end of the output shaft of the second electric push rod (101). A clamping plate (102) for clamping the head is fixedly installed on the top of the rotating plate (1011). An airbag is provided on the opposite side of the clamping plate (102). A first screw (1013) is connected to the bottom of the rotating plate (1011) through a first constant force spring (1012). A threaded sleeve (1014) is threaded onto the first screw (1013). The headstock is provided with a drive mechanism (3) for driving the rotary table (202) and the threaded sleeve (1014) to rotate respectively.

2. The eyelid-opening device for head fixation in ophthalmic surgery according to claim 1, characterized in that, A turntable (2033) is rotatably mounted on the end of the output shaft of the first electric push rod (2032). An installation rod (2034) is fixedly mounted on the arc surface of the turntable (2033). A rotating seat (2035) is rotatably mounted on the top of the installation rod (2034). The expansion plate (206) is fixedly connected to the rotating seat (2035) by a third constant force spring. A pressure sensor is provided between the third constant force spring and the rotating seat (2035). An arc rack (2036) is fixedly mounted on the rotating seat (2035). An angle gear (2037) is also rotatably mounted on the end of the output shaft of the first electric push rod (2032). The angle gear (2037) meshes with the arc rack (2036). A miniature servo motor (2038) for driving the angle gear (2037) to rotate is provided on the end of the output shaft of the first electric push rod (2032).

3. The eyelid-opening device for head fixation in ophthalmic surgery according to claim 2, characterized in that, Two first worm gears (2011) are rotatably mounted on the mounting bracket (201). A small servo motor (2012) is fixedly mounted on the mounting bracket (201). A first worm (2013) is fixedly connected to the end of the output shaft of the small servo motor (2012). The first worm (2013) meshes with the first worm gears (2011). A second constant force spring (2014) is provided on the first worm gear (2011). The outer end of the second constant force spring (2014) is fixedly connected to the side of the cantilever (203) near the rotary table (202).

4. The eyelid-opening device for head fixation in ophthalmic surgery according to claim 1, characterized in that, A main shaft (204) is vertically rotatably mounted on the mounting bracket (201). The main shaft (204) is inserted into the rotary table (202). The bottom end of the main shaft (204) is connected to the drive mechanism (3). A variable diameter spline (2041) is provided in the middle of the main shaft (204). The variable diameter spline (2041) is used to connect and disconnect the main shaft (204) and the rotary table (202). A third electric push rod (2015) is vertically fixedly mounted on the mounting bracket (201). A push plate (2016) is fixedly mounted on the end of the output shaft of the third electric push rod (2015). The top surface of the push plate (2016) is close to the bottom surface of the rotary table (202). The cross-section of the rotary table (202) gradually decreases from top to bottom.

5. The eyelid-opening device for head fixation in ophthalmic surgery according to claim 4, characterized in that, A first bevel gear (2042) is fixedly mounted on the top of the main shaft (204). A first rotating shaft (2017) and a second rotating shaft (2018) are horizontally rotatably mounted on the mounting bracket (201). The first rotating shaft (2017) and the second rotating shaft (2018) are connected in a transmission manner. A second bevel gear (20171) that meshes with the first bevel gear (2042) is fixedly mounted on the first rotating shaft (2017). A second worm gear (20181) is fixedly connected to the second rotating shaft (2018). A second screw (205) is vertically rotatably mounted on the mounting bracket (201). A threaded disc is threaded onto the second screw (205), and a second worm wheel (2051) that meshes with the second worm (20181) is fixedly installed on the threaded disc. A first lifting disc (2052) is fixedly installed at the bottom end of the second screw (205), and a second lifting disc (2021) is fixedly connected to the top end of the rotary table (202). The first lifting disc (2052) and the second lifting disc (2021) are engaged. The first lifting disc (2052) is a disc, and an annular groove is provided on the periphery of the second lifting disc (2021). The edge of the disc is engaged in the annular groove.

6. The eyelid-opening device for head fixation in ophthalmic surgery according to claim 4, characterized in that, The main shaft (204) includes a first main shaft (2043), a second main shaft (2044), and a connecting shaft (2045) for connecting the first main shaft (2043) and the second main shaft (2044). The variable diameter spline (2041) includes a first gear (20411) rotatably mounted on the connecting shaft (2045). Multiple limiting grooves (20451) are uniformly fixedly mounted on the connecting shaft (2045). The groove (20451) is radial. A slide bar (20452) is slidably installed in the limiting slide groove (20451). An arc plate (20453) is fixedly connected to the outer end of the slide bar (20452). A spline bar (20454) for connecting with the rotary table (202) is vertically fixedly installed on the arc plate (20453). The rotary table (202) is provided with multiple spline grooves that cooperate with the spline bar (20454). A spline motor (2046) is provided on one side of the main shaft (204). A second gear (20461) that meshes with the first gear (20411) is fixedly installed on the end of the output shaft of the spline motor (2046). A slider is fixedly installed on one end of the slide bar (20452) near the main shaft (204). Multiple curved grooves (20412) are opened on the first gear (20411). The slider is slidably connected to the curved grooves (20412). When the first gear (20411) rotates clockwise, the slider slides from the inside to the outside in the curved groove (20412), causing the slide bar (20452) to slide from the inside to the outside in the limiting groove (20451), thereby pushing the spline bar (20454) to engage in the spline groove of the rotary table (202); when the first gear (20411) rotates counterclockwise, the slider slides from the outside to the inside in the curved groove (20412), causing the slide bar (20452) to slide from the outside to the inside in the limiting groove (20451), thereby causing the spline bar (20454) to disengage from the spline groove of the rotary table (202).

7. The eyelid-opening device for head fixation in ophthalmic surgery according to claim 4, characterized in that, The drive mechanism (3) includes an active motor (301), on which a third bevel gear (3011) is fixedly mounted. A transmission shaft (3012) is rotatably mounted on the operating table. A fourth bevel gear (3013) and a fifth bevel gear (3014) are fixedly mounted at both ends of the transmission shaft (3012). The fourth bevel gear (3013) meshes with the third bevel gear (3011). A main shaft transmission shaft (3015) is rotatably mounted on the operating table. A sixth bevel gear (3016) meshes with the fifth bevel gear (3014) on the main shaft transmission shaft (3015). The main shaft transmission shaft (3015) is connected to the main shaft (204) in a transmission connection.

8. The eyelid-opening device for head fixation in ophthalmic surgery according to claim 7, characterized in that, The output shaft of the active motor (301) is connected to a third worm gear (303) via a sliding spline sleeve (302). The output shaft of the active motor (301) and one end of the third worm gear (303) are provided with external splines, and the sliding spline sleeve (302) is provided with internal splines. The external splines and internal splines cooperate with each other. A dovetail groove guide rail (304) is fixedly installed on the operating table. A dovetail groove slider (3041) is slidably installed in the dovetail groove guide rail (304). The dovetail groove slider (3041) and the sliding spline sleeve (302) are fixedly connected by a connecting rod. A guide rail motor (305) for driving the dovetail groove slider (3041) to translate is provided in the dovetail groove guide rail (304). A third worm gear (10141) is fixedly installed on the threaded sleeve (1014), and the third worm gear (10141) meshes with the third worm (303).

9. The eyelid-opening device for head fixation in ophthalmic surgery according to claim 1, characterized in that, The head fixation device (1) also includes a top support plate (103) and a neck support plate (104) disposed on the other two sides of the pillow. The bottom ends of the top support plate (103) and the neck support plate (104) are respectively connected to electric push rods for pushing the top support plate (103) and the neck support plate (104) to rise and fall. A top limiting plate (105) is also disposed on the upper side of the top support plate (103). The top limiting plate (105) is connected to an electric push rod for pushing the top limiting plate (105) to move laterally. Airbags are disposed on the top support plate (103), the neck support plate (104) and the top limiting plate (105).

10. A method of using a blepharoplasty device for head fixation in ophthalmic surgery according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Guide the patient to lie on the hospital bed with the patient's head on a pillow; S2: Fix the patient's head with the head fixation device (1), start the second electric push rod (101), the second electric push rod (101) pushes the two clamping plates (102) closer to each other to clamp the patient's head; S3: The patient's eyelids are opened using the eyelid opener (2). The first electric push rod (2032) is activated. The first electric push rod (2032) extends and drives the opening plate (206) to move to the patient's eyelid. The opening plate (206) is placed at the patient's eyelid. The drive mechanism (3) is activated. The drive mechanism (3) drives the rotating table (202) to rotate. The rotating table (202) pushes the rotating wheel (2031) to move, so that the two rotating wheels (2031) move closer to each other, so that the cantilever (203) rotates and the front ends of the cantilever (203) move away from each other. The two opening plates (206) move away from each other, opening the patient's eyelids. Then ophthalmic surgery can be performed. S4: When it is necessary to adjust the patient's head angle, start the drive mechanism (3), drive the threaded sleeve (1014) to rotate, the rotating threaded sleeve (1014) drives the first screw (1013) to move laterally, the first screw (1013) pushes the clamping plate (102) to rotate, and rotates the patient's head. After the patient's head angle adjustment is completed, S3 can be repeated.

Images