CN113116671A

CN113116671A - Ophthalmic surgery fixing device

Info

Publication number: CN113116671A
Application number: CN202110420158.4A
Authority: CN
Inventors: 王丽琴; 付敏; 胡盼; 朱姝; 宋碧英; 张刚
Original assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Current assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-07-16
Anticipated expiration: 2041-04-19
Also published as: CN113116671B

Abstract

The invention discloses a fixing device for ophthalmologic operation, which comprises a base, a mandible fixer and a forehead fixing component, wherein the top of the base is provided with a groove for supporting a head; the lower jaw fixer is arranged on the base and used for fixing two lower jaw shuttle lines of a patient, the lower jaw fixer comprises two supporting components, two driving components and two embracing claws, the supporting components are arranged on the base, the angles and the lengths of the supporting components can be adjusted, the driving components are arranged on the supporting components, the two embracing claws are oppositely arranged on the driving components, the driving components can drive the two embracing claws to be separated or folded simultaneously, the forehead fixing components are arranged on the base, and the lengths of the forehead fixing components can be adjusted and used for fixing the forehead of the patient. The fixing device for the ophthalmic surgery can form support on the forehead and two lower jaw shuttle lines of a patient, thereby ensuring that the patient is fixed in the process of the ophthalmic surgery.

Description

Ophthalmic surgery fixing device

Technical Field

The invention relates to the field of auxiliary equipment for operations, in particular to an ophthalmic operation fixing device.

Background

In ophthalmic surgery, the patient needs to be subjected to general anesthesia in part of surgery, for the patient who is subjected to general anesthesia, an air passage needs to be opened to establish an artificial air passage and the air passage is required to be in an opened state in the surgery process, and meanwhile, in the surgery process, as the eyes belong to a sensitive area of a human body, once the patient moves, the surgery process possibly causes great damage to the patient. Therefore, in the eye surgery, the medical staff usually fixes the head of the patient by using a binding means to prevent the head of the patient from moving and causing the injury in the surgery.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an ophthalmologic operation fixing device which can support the forehead and two lower jaw shuttle lines of a patient so as to ensure that the patient is fixed in the ophthalmologic operation process.

In order to achieve the purpose, the invention is realized by the following technical scheme: an ophthalmic surgical fixation device comprising:

the top of the base is provided with a groove for supporting the head;

the lower jaw fixer is arranged on the base and used for fixing two lower jaw shuttle lines of a patient, the lower jaw fixer comprises a supporting component, a driving component and two holding claws, the supporting component is arranged on the base, the angle and the length of the supporting component can be adjusted, the driving component is arranged on the supporting component, the two holding claws are oppositely arranged on the driving component, and the driving component can drive the two holding claws to be simultaneously separated or folded, and

the forehead fixing component is arranged on the base, and the length of the forehead fixing component can be adjusted to fix the forehead of a patient.

Further, the driving assembly comprises a mounting plate, a bidirectional rotating power source, a worm, two worm gears, two first connecting rods, two second connecting rods and two third connecting rods; the mounting plate is arranged on the supporting component, one side, far away from the supporting component, of the mounting plate is provided with a mounting groove, the bidirectional rotating power source is arranged on the mounting plate, a power output shaft of the bidirectional rotating power source is provided with the worm, the worm extends into the mounting groove, the two worm gears are rotatably arranged in the mounting groove, are oppositely positioned on the left side and the right side of the worm gears and are meshed with the worm gears; every be provided with one on the worm wheel first connecting rod, just first connecting rod along the radial setting of worm wheel, the second connecting rod with first connecting rod parallel arrangement, just second connecting rod one end articulates in the mounting groove, third connecting rod both ends are kept away from with first connecting rod and second connecting rod respectively the one end of mounting panel is articulated, be provided with on the third connecting rod embrace the claw.

Further, the supporting component comprises a first supporting rod, a second supporting rod and a third supporting rod, wherein the first supporting rod is vertically arranged on the base, the first supporting rod is far away from the end portion of the base, a first spherical mounting groove is formed in the end portion of the base, the second supporting rod is arranged on the mounting plate, the second supporting rod is far away from one end of the mounting plate, a second spherical mounting groove is formed in the end portion of the mounting plate, and the two ends of the third supporting rod are ball joints which are hinged to the first spherical mounting groove and the second spherical mounting groove and matched with the ball joints.

Furthermore, the supporting assembly further comprises a limiting piece, the third supporting rod is a hollow rod, and the limiting piece comprises an air bag, a bolt, a three-fork-shaped air pipe and an inflating device; the utility model discloses a spherical air bag, including spherical mounting groove, gasbag, aerating device, the tracheal first end of trident, the gasbag has two to be located two respectively in the bulb hinge, the tracheal both ends of trident respectively with two the gasbag intercommunication, be connected with on the tracheal third end of trident aerating device, a plurality of via holes have been seted up on the bulb hinge, first spherical mounting groove with all be provided with a plurality of spacing holes on the inner wall of the spherical mounting groove of second, the outer wall interval of gasbag is provided with a plurality ofly the bolt, just the bolt with the via hole one-to-one, when the gasbag is free state, the bolt with spacing hole is the off-state, works as when the gasbag is the inflation state, the bolt can insert spacing downthehole.

Furthermore, the forehead fixing assembly comprises a head band and two winding devices, the two winding devices are arranged on the base and symmetrically arranged on the left side and the right side of the groove, the head band can be bent, two ends of the head band are respectively arranged on the two winding devices, and the winding devices can wind and unwind the head band.

Further, the winder comprises a shell, a rotating shaft, a coil spring and a limiting block, wherein the inner cavity of the shell is hollow, the rotating shaft is arranged in the inner cavity of the shell, a through hole communicated with the inner cavity of the shell is formed in the side wall of the shell, the through hole is arranged in parallel with the rotating shaft, the coil spring is sleeved on the rotating shaft, and the tail end of the coil spring is connected to the rotating shaft; the end part of the headband penetrates through the through hole and then is connected with the head end of the coil spring; the shell is provided with a T-shaped sliding groove at the position of the through hole, the small end of the T-shaped sliding groove is communicated with the outside, the large end of the T-shaped sliding groove is communicated with the through hole, the interface of the small end and the large end is a first inclined plane, the limiting block comprises a sliding portion and a clamping portion, the sliding portion is located in the small end and extends out of the shell, a baffle is arranged at the end portion, far away from the clamping portion, of the sliding portion and abuts against the end face of the shell, the clamping portion is located in the large end and extends into the inner cavity of the shell until abutting against the head band, and the clamping portion and the sliding portion are obliquely arranged and are matched with the first inclined plane.

Further, a cushion pad is arranged between the baffle and the shell.

Further, still include the shoulder pad, the shoulder pad sets up in the side of base is far away from the supporting component.

Further, still include the adjusting pad, the adjusting pad is located the base with between the shoulder pad, the adjusting pad height can be adjusted.

Further, the adjusting cushion is an air bag.

The invention has the beneficial effects that:

above-mentioned ophthalmic surgery fixing device, including base, jaw fixer and forehead fixed subassembly, the top of base is seted up flutedly for support head, and jaw fixer sets up on the base for fixed patient's lower jaw shuttle line, and forehead fixed subassembly sets up on the base, and angle and length can be adjusted, are used for fixed patient's two lower jaw shuttle lines. When the device is used, the two lower jaw shuttle lines of a human body can be fixed through the two holding claws, the headband can fix the forehead part, so that the whole head part is fixed in a three-point mode, the position of the head part can be firmly fixed, and meanwhile, the patient can keep the state that an air passage is opened through fixing the two lower jaw shuttle lines simultaneously. The angle and the height of the supporting component can be adjusted at will, when the device is used, the driving component is pulled to a required position, after the two lower jaw shuttle lines are fixed, the angle and the height of the supporting component are fixed, the purpose that the driving component and the holding claw are adjusted to the required position flexibly can be achieved, meanwhile, the position of the supporting component is fixed in a pneumatic mode, and the device is simple, convenient and reliable in operation mode.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

FIG. 1 is a schematic view of an ophthalmic surgical fastening device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a support assembly of the ophthalmic surgical fixation device of FIG. 1;

FIG. 3 is a schematic view of the support assembly of the ophthalmic surgical fastening device of FIG. 2 being angularly adjusted;

FIG. 4 is a schematic view of a drive assembly in an ophthalmic surgical fixture as shown in FIG. 1;

FIG. 5 is a schematic view of a retractor of an ophthalmic surgical fastening device shown in FIG. 1;

FIG. 6 is a schematic view of a stop block of the ophthalmic surgical fastening device of FIG. 1;

FIG. 7 is a schematic view of the head;

reference numerals:

100-base, 110-groove, 200-jaw fixer, 210-driving component, 211-mounting plate, 212-bidirectional rotation power source, 213-worm, 214-worm wheel, 215-first connecting rod, 216-second connecting rod, 217-third connecting rod, 220-supporting component, 221-first supporting rod, 222-second supporting rod, 223-third supporting rod, 2211-first spherical mounting groove, 2222-second spherical groove, 2231-ball head hinge, 2212-limiting hole, 2232-through hole, 224-limiting component, 2241-air bag, 2242-bolt, 2243-three-fork-shaped air pipe, 2244-inflating device, 230-embracing claw, 300-forehead fixing component, 310-head band, 320-winder, 321-shell, 3211-T type spout, 3212-perforation, 322-pivot, 323-coil spring, 324-stopper, 3241-sliding part, 3242-screens portion, 3243-baffle, 3244-blotter, 400-shoulder pad, 500-adjusting pad.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

Referring to fig. 1 to 8, the present invention provides an ophthalmic surgery fixing apparatus including a base 100, a mandibular fixer 200 and a forehead fixing assembly 300 for fixing a patient's head and two mandibular bobbin threads 1 during general anesthesia ophthalmic surgery, and maintaining the patient in an airway open state by simultaneously fixing the two mandibular bobbin threads 1 and the forehead.

Referring to fig. 1 and 2, in particular, the top of the base 100 is formed with a groove 110 for supporting the head, and the size and shape of the groove 110 should be similar to the head of a human body.

Referring to fig. 1, 3, 4 and 5, a mandible fixer 200 is provided on the base 100 for fixing two mandible shuttle lines 1 of a patient. The mandibular fixator 200 comprises a support assembly 220, a driving assembly 210 and two holding claws 230, wherein the support assembly 220 is arranged on the base 100, the angle and the length of the support assembly 220 can be adjusted, the driving assembly 210 is arranged on the support assembly 220, the two holding claws 230 are oppositely arranged on the driving assembly 210, and the driving assembly 210 can drive the two holding claws 230 to be opened or closed simultaneously. During operation, the airway of the patient is opened, the head of the patient is in an open airway state, the driving assembly 210 is pulled, the driving assembly 210 is started, and the two holding claws 230 are driven to respectively hold the two lower jaw shuttle lines 1 of the patient from the left side and the right side.

Referring to fig. 5, in detail, the driving assembly 210 includes a mounting plate 211, a bidirectional rotation power source 212, a worm 213, two worm gears 214, two first links 215, two second links 216, and two third links 217. The mounting block is disposed on the support assembly 220. The mounting panel 211 sets up on supporting component 220, and the mounting groove has been seted up to one side that supporting component was kept away from to mounting panel 211, and two-way rotary power source 212 sets up on the mounting panel 211, is provided with worm 213 on two-way rotary power source 212's the power output shaft, and in worm 213 extended to the mounting groove, two worm wheel 214 can the pivoted setting in the mounting groove, and relative be located the left and right sides of worm wheel 214 and mesh with worm wheel 214. Each worm wheel 214 is provided with a first link 215, and the first link 215 is arranged along a radial direction of the worm wheel 214. The second link 216 is disposed in parallel with the first link 215, and one end of the second link 216 is hinged in the mounting groove. Two ends of the third connecting rod 217 are respectively hinged with one ends of the first connecting rod 215 and the second connecting rod 216 far away from the mounting plate 211, and a holding claw 230 is arranged on the third connecting rod 217. When the bidirectional rotation power source 212 rotates clockwise, the worm 213 and the worm wheel 214 are driven to rotate, the two clasping claws 230 move relatively under the action of the worm wheel 214, the two first connecting rods 215, the two second connecting rods 216 and the two third connecting rods 217, and can respectively clasp the left side and the right side of the lower jaw, and when the bidirectional rotation power source 212 rotates counterclockwise, the two clasping claws 230 can be driven to move back to back.

Referring to fig. 3 and 4, in the present embodiment, the support assembly 220 includes a first support bar 221, a second support bar 222, and a third support bar 223. The first supporting rod 221 is vertically disposed on the base 100, and a first spherical mounting groove 2211 is disposed at an end of the first supporting rod 221 away from the base 100. The second support rod 222 is disposed on the mounting plate 211, and a second spherical mounting groove 2222 is formed at an end of the second support rod 222 away from the mounting plate 211. The two ends of the third support rod 223 are ball joints 2231, the two ball joints 2231 are hinged to the first spherical mounting groove 2211 and the second spherical mounting groove 2222, and the two ball joints 2231 and the second spherical mounting groove 2222 matched with the ball joints are in tight fit. With the ball-end hinge 2231, the clasping claw 230 can be adjusted to a desired position by pulling the driving assembly 210 during use.

In order to prevent the ball pivot 2231 from loosening from the second ball mounting groove 2222 after a long period of use, the support assembly 220 further includes a stopper 224. The third support bar 223 is a hollow bar, and the position-limiting member 224 includes an air bag 2241, a bolt 2242, a three-fork shaped air pipe 2243 and an inflator 2244. The number of the air bags 2241 is two, the air bags are located in the two ball hinges 2231 respectively, two ends of the three-fork-shaped air pipe 2243 are communicated with the two air bags 2241 respectively, and the third end of the three-fork-shaped air pipe 2243 is connected with an inflating device 2244. A plurality of through holes 3212 are formed in the ball joint 2231, a plurality of through holes 2232 are formed in the inner wall of the ball joint 2231, a plurality of bolts 2242 are arranged on the outer wall of the air bag 2241 at intervals, the bolts 2242 correspond to the through holes 2232 one to one, when the air bag 2241 is in a free state, the bolts 2242 are in a separation state from the limiting holes 2212, and when the air bag 2241 is in an expansion state, the bolts 2242 can be inserted into the limiting holes 2212.

In a natural state, the air bags 2241 are in a natural state, the bolts 2242 are not inserted into the limiting holes 2212, when the holding of the lower jaw shuttle thread 1 is completed, an operator can start the inflating device 2244 to inflate, air enters the two air bags 2241 through the three-fork-shaped air pipe 2243, the two air bags 2241 expand, all the bolts 2242 on the two air bags are driven to penetrate into the corresponding limiting blocks 324 along the through holes 3212, and then the ball joint 2231 can be prevented from rotating; when needs angle of adjustment or height, start aerating device 2244, gas in the gasbag 2241 is put away, gasbag 2241 recovers natural state, bolt 2242 breaks away from spacing hole 2212, then angle or altitude mixture control can carry out, effect through locating part 224, the position that can effectual assurance hug closely the state changes, and simultaneously, spacing mode easy operation, when concrete implementation, aerating device can set up on ground, operator's accessible foot carries out the operation of the quick closing of aerating device, and then can vacate two hands and carry out other relevant operations.

Referring previously to fig. 2, 5 and 7, forehead fixing assembly 300 is used to fix the forehead of a patient. The forehead fixing assembly 300 includes a headband 310 and a retractor 320. The two winding devices 320 are disposed on the base 100 and symmetrically disposed on the left and right sides of the groove 110, the headband 310 can be bent, two ends of the headband 310 are disposed on the two winding devices 320, respectively, and the winding devices 320 are used for winding and unwinding the headband 310.

Referring to fig. 6 and 7, in the present embodiment, the retractor 320 includes a housing 321, a rotation shaft 322, a coil spring 323, and a stopper 324. The inner cavity of the shell 321 is hollow, the rotating shaft 322 is arranged in the inner cavity of the shell 321, a through hole 3212 communicated with the inner cavity of the shell 321 is formed in the side wall of the shell 321, the through hole 3212 is arranged in parallel with the rotating shaft 322, the coil spring 323 is sleeved on the rotating shaft 322, and the tail end of the coil spring 323 is connected to the rotating shaft 322; the end of the headband 310 passes through the through hole 3212 and is connected to the head end of the coil spring 323; the shell 321 is provided with a T-shaped chute 3211 at the through hole 3212, a small end of the T-shaped chute 3211 communicates with the outside, a large end of the T-shaped chute 3211 communicates with the through hole 3212, an interface between the small end and the large end is a first inclined surface, the stopper 324 includes a sliding portion 3241 and a locking portion 3242, the sliding portion 3241 is located in the small end and extends to the outside of the shell 321, an end of the sliding portion 3241 away from the locking portion 3242 is provided with a baffle 3243, the baffle 3243 abuts against an end surface of the shell 321, the locking portion 3242 is located in the large end and extends into an inner cavity of the shell 321 until abutting against the headband 310, and the interface between the locking portion 3242 and the sliding portion 3241 is obliquely arranged and adapted to the first inclined surface.

When the head needs to be fixed, the headband 310 is pulled outwards, the two ends of the headband 310 are pulled out of the rolling device 320, the headband 310 is sleeved on the forehead of the patient after the headband is pulled to the required length, and then the two baffles 3243 are pushed respectively. When the headband 310 needs to be taken off, the position of the headband 310 can be clamped and fixed by firmly clamping the end part of the clamping part 3242 on the headband 310, and when the headband 310 needs to be taken off, the baffle 3243 is pushed reversely, so that the headband 310 can be loosened, and the headband 310 is pulled and taken off. Further, a cushion 3244 is provided between the baffle 3243 and the housing 321. The bumper 3244 provides some cushioning to prevent the stop block 324 from crushing the headband 310.

In a preferred embodiment, the fastening device further comprises a shoulder pad 400, the shoulder pad 400 being disposed on the side of the base 100 remote from the support assembly 220. The shoulder pad 400 can provide a certain support for the shoulder, which facilitates the convenient opening of the airway. In addition, the fixing device further includes a conditioning pad 500. The adjusting pad 500 is located between the base 100 and the shoulder pad 400, and the height of the adjusting pad 500 can be adjusted. The adjusting pad 500 is used for supporting the neck of a patient, and the height of the adjusting pad can be adjusted according to the shapes of the head, the shoulders and the neck when the adjusting pad is used, so that the dislocation of the neck of the patient is avoided. In particular implementations, the conditioner mat 500 may preferably be an air bag 2241 or other height adjustable mat.

The usage of the ophthalmic surgery fixing device comprises the following steps:

the fixing device is placed on an operation bed surface between general anaesthesia, then the head of a patient is positioned in the groove 110, the shoulders of the patient are positioned on the shoulder pads 400, then the driving component 210 is pulled, the two holding claws 230 are positioned at the left side and the right side of the two lower jaw shuttle lines 1, and then the bidirectional rotary power source 212 is started, so that the two holding claws 230 respectively and slowly approach to the lower jaw shuttle lines 1 at the two sides until the two lower jaw shuttle lines 1 are clamped tightly; then, the headband 310 is pulled and sleeved on the head, and finally, the two limit blocks 324 are locked, so that the corresponding eye surgery can be performed. After the operation is completed, the limiting block 324 is firstly released, the head band 310 is pulled and the head band 310 is taken down from the head, and then the bidirectional rotation power source 212 is started to rotate reversely to drive the two holding claws 230 to be released.

The fixing device for ophthalmic surgery comprises a base 100, a mandibular fixator 200 and a forehead fixing assembly 300, and when in use, the whole head is fixed in a three-point mode through two holding claws 230 and a head band 310, so that the position of the head can be firmly fixed. The angle and the height of the supporting component 220 can be adjusted at will, when the device is used, the driving component 210 is pulled to a required position, after the mandible shuttle lines 1 on two sides are fixed, the angle and the height of the supporting component 220 are fixed, the requirement of the flexible use holding position can be met, meanwhile, the position of the supporting component 220 is fixed in a pneumatic mode, and the whole operation is simple, convenient and reliable. The shoulder and the head of the patient are kept in a straight line through the support of the shoulder pad 400, so that the opening of the airway is facilitated; the height of the adjusting pad 500 can be adjusted, and the height of the adjusting pad can be adjusted according to the shapes of the head, the shoulders and the neck when the adjusting pad is used, so that the dislocation of the neck of a patient is avoided.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. An ophthalmic surgical fixation device, comprising:

the top of the base is provided with a groove for supporting the head;

2. The ophthalmic surgical fixation device of claim 1, wherein the drive assembly comprises a mounting plate, a bi-directional rotary power source, a worm, two worm gears, two first links, two second links, and two third links; the mounting plate is arranged on the supporting component, one side, far away from the supporting component, of the mounting plate is provided with a mounting groove, the bidirectional rotating power source is arranged on the mounting plate, a power output shaft of the bidirectional rotating power source is provided with the worm, the worm extends into the mounting groove, the two worm gears are rotatably arranged in the mounting groove, are oppositely positioned on the left side and the right side of the worm gears and are meshed with the worm gears; every be provided with one on the worm wheel first connecting rod, just first connecting rod along the radial setting of worm wheel, the second connecting rod with first connecting rod parallel arrangement, just second connecting rod one end articulates in the mounting groove, third connecting rod both ends are kept away from with first connecting rod and second connecting rod respectively the one end of mounting panel is articulated, be provided with on the third connecting rod embrace the claw.

3. The ophthalmic surgical fixation device of claim 1, wherein the support assembly comprises a first support bar, a second support bar, and a third support bar; the vertical setting of first bracing piece is in on the base, first bracing piece is kept away from first spherical mounting groove has been seted up in the tip setting of base, the second bracing piece sets up on the mounting panel, the second bracing piece is kept away from the spherical mounting groove of second has been seted up to the one end of mounting panel, the both ends of third bracing piece are the bulb hinge, two the bulb hinge respectively with first spherical mounting groove and the spherical mounting groove of second are articulated, and two the bulb hinge with its adaptation tight fit between the spherical mounting groove of second.

4. The ophthalmic surgical fixation device of claim 3, wherein the support assembly further comprises a stop, the third support rod is a hollow rod, the stop comprises an air bag, a plug, a trifurcate air tube, and an inflation device; the utility model discloses a spherical air bag, including spherical mounting groove, gasbag, aerating device, the tracheal first end of trident, the gasbag has two to be located two respectively in the bulb hinge, the tracheal both ends of trident respectively with two the gasbag intercommunication, be connected with on the tracheal third end of trident aerating device, a plurality of via holes have been seted up on the bulb hinge, first spherical mounting groove with all be provided with a plurality of spacing holes on the inner wall of the spherical mounting groove of second, the outer wall interval of gasbag is provided with a plurality ofly the bolt, just the bolt with the via hole one-to-one, when the gasbag is free state, the bolt with spacing hole is the off-state, works as when the gasbag is the inflation state, the bolt can insert spacing downthehole.

5. The ophthalmic surgical fixing device according to claim 1, wherein the forehead fixing assembly comprises two head straps and two winding devices, the two winding devices are disposed on the base and symmetrically disposed at the left and right sides of the groove, the head straps can be bent, two ends of the head straps are disposed on the two winding devices, respectively, and the winding devices can wind and unwind the head straps.

6. The ophthalmic surgery fixing device of claim 5, wherein the retractor comprises a housing, a rotating shaft, a coil spring and a limiting block, the inner cavity of the housing is hollow, the rotating shaft is arranged in the inner cavity of the housing, a through hole communicated with the inner cavity of the housing is formed in a side wall of the housing, the through hole is arranged in parallel with the rotating shaft, the coil spring is sleeved on the rotating shaft, and the tail end of the coil spring is connected to the rotating shaft; the end part of the headband penetrates through the through hole and then is connected with the head end of the coil spring; the shell is provided with a T-shaped sliding groove at the position of the through hole, the small end of the T-shaped sliding groove is communicated with the outside, the large end of the T-shaped sliding groove is communicated with the through hole, the interface of the small end and the large end is a first inclined plane, the limiting block comprises a sliding portion and a clamping portion, the sliding portion is located in the small end and extends out of the shell, a baffle is arranged at the end portion, far away from the clamping portion, of the sliding portion and abuts against the end face of the shell, the clamping portion is located in the large end and extends into the inner cavity of the shell until abutting against the head band, and the clamping portion and the sliding portion are obliquely arranged and are matched with the first inclined plane.

7. The ophthalmic surgical fixation device of claim 6, wherein a cushion is disposed between the baffle and the housing.

8. The ophthalmic surgical fixation device of claim 1, further comprising a shoulder pad disposed on a side of the base distal from the support assembly.

9. The ophthalmic surgical fixation device of claim 8, further comprising an adjustment pad positioned between the base and the shoulder pad, the adjustment pad being adjustable in height.

10. The ophthalmic surgical fixation device of claim 9, wherein the adjustment pad is a balloon.