Ophthalmologic operation fixing device

Abstract

The invention discloses an ophthalmologic operation fixing device. The ophthalmologic operation fixing device comprises an operating bed, a sliding table, a supporting base, a head top fixing frame and a main controller. The sliding table is arranged on a base of a bed head of the operating bed and can be driven by a first electric driving mechanism and a second electric driving mechanism to move front and back and left and right. The supporting seat is arranged on the sliding table and driven by a third electric driving mechanism to move up and down, a flexible bag body is fixedly arranged on the concave surface of the inner side of the supporting seat, and shear thickening fluid is filled or discharged through the fluid supply module so as to adapt to the curved surface of the head and neck of the patient and provide supporting and limiting. The head top fixing frame is arranged on the front side of the supporting base, the position can be finely adjusted through a first manual adjusting mechanism and a second manual adjusting mechanism, the head top fixing frame is composed of a deformation frame and an elastic shield, and the deformation frame is made of memory alloy, expands when catching a cold and shrinks when receiving body temperature heat, is convenient to install and fix and adapts to different head types. The device can effectively limit movement of the head of a patient and ensure operation stability.

Description

Technical Field

[0001] The invention relates to the field of ophthalmic surgery, and in particular to an ophthalmic surgery fixing device. Background Art

[0002] It is very important to fix the patient's head during ophthalmic surgery. Stable and reliable head fixation can effectively prevent accidental movement of the patient's head, thereby ensuring the accuracy of the surgical operation, reducing surgical risks, and ensuring the smooth progress of the operation.

[0003] Traditional methods of head fixation in ophthalmic surgery mainly rely on simple headbands, head frames and other devices. However, these methods have many limitations. For example, although the headband fixation method is simple to operate, it is difficult to ensure the absolute stability of the head during the operation. The slight movement of the patient's head may interfere with the surgical operation. Especially when performing delicate ophthalmic surgery, this instability may lead to reduced surgical accuracy and even cause surgical complications. Although head frame fixation improves the fixation effect to a certain extent, it usually requires applying greater pressure to the patient's head, which may not only make the patient feel uncomfortable, but also cause compressive damage to the patient's head, affecting the safety of the operation.

[0004] Related technologies have been improved. For example, patents such as CN202110391206.1 use multiple movable fixing plates to clamp and fix the patient's head. However, due to the fixed shape of the fixing plates, it is difficult to adapt to the head shapes of different patients, which makes it uncomfortable for patients to use. Moreover, when in use, only the patient's forehead is fixed, and there is a lack of limit on the head, neck and cheeks, which has a poor fixation effect on the patient's head. In addition, the entire fixator has little freedom of movement and cannot flexibly adjust its position.

[0005] Therefore, developing a new type of ophthalmic surgical fixation device to solve the problems existing in the existing technology and improve the safety, stability and comfort of the operation is an important research direction in the current field of ophthalmic surgery. This device needs to have flexible adjustment functions to adapt to the shape and size of different patients' heads; it needs to have a good fixation effect and be able to effectively limit the movement of the patient's head during the operation; it also needs to consider the patient's comfort and avoid unnecessary pressure and damage to the patient's head. At the same time, the operation of the device should be simple and quick, which can improve the efficiency of the operation and meet the high requirements of modern ophthalmic surgery. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an ophthalmic surgery fixation device.

[0007] The technical solution of the present invention is as follows: an ophthalmic surgical fixation device, characterized in that it comprises:

[0008] An operating table, wherein a base is provided at the head of the operating table;

[0009] A slide, the slide is movably arranged on the base, and a first electric drive mechanism and a second electric drive mechanism are arranged on the base, the first electric drive mechanism is used to drive the slide to move forward and backward, and the second electric drive mechanism is used to drive the slide to move left and right;

[0010] A support seat, the support seat is movably arranged on the slide, the slide is provided with a third electric drive mechanism, the third electric drive mechanism is used to drive the support seat to move up and down, the support seat is an open annular seat that is concave downward as a whole, a flexible capsule is fixedly arranged on the entire inner concave surface of the support seat, a liquid supply module is provided on the slide, the liquid supply module is connected to the flexible capsule, and the liquid supply module is used to fill and discharge the shear thickening fluid into the flexible capsule;

[0011] A head-mounted fixing frame, the head-mounted fixing frame is movably arranged on the front side of the support seat, the support seat is provided with a first manual adjustment mechanism and a second manual adjustment mechanism, the first manual adjustment mechanism is used to adjust the head-mounted fixing frame to move forward and backward, and the second manual adjustment mechanism is used to adjust the head-mounted fixing frame to move left and right, the head-mounted fixing frame includes a deformation frame and an elastic shield, the deformation frame is a memory alloy frame that expands when exposed to cold and contracts when exposed to heat, the deformation frame is an arc-shaped frame that is concave forward, the elastic shield fixing cover is arranged on the outside of the deformation frame and can be deformed together with the deformation frame, the elastic shield is hollow inside to form a sandwich cavity, a water supply pipe is provided on the top of the elastic shield, and a drainage pipe is provided on the bottom, the water supply pipe and the drainage pipe are respectively connected to the sandwich cavity, and a first control valve is provided on the drainage pipe;

[0012] A main controller is arranged at the head of the operating bed, and the first electric drive mechanism, the second electric drive mechanism, the third electric drive mechanism and the liquid supply module are electrically connected to the main controller respectively.

[0013] Further, the first electric drive mechanism includes a first base, a first motor, a first screw rod, a first slider and a first guide rod, the first base is fixed on the pedestal, the first base is provided with a first screw rod and a first guide rod extending in the front-rear direction respectively, the first motor is arranged on the first base and connected to the first screw rod to drive the first screw rod to rotate, the first slider is provided with a first screw hole and a first guide hole, the first screw hole is threadedly matched with the first screw rod, and the first guide hole is slidably matched with the first guide rod.

[0014] Furthermore, the second electric drive mechanism includes a second base, a second motor, a second screw rod, a second slider and a second guide rod, the second base is fixedly arranged on the first slider, the second base is provided with a second screw rod and a second guide rod extending in the front-rear direction respectively, the second motor is arranged on the second base and connected to the second screw rod to drive the second screw rod to rotate, the second slider is provided with a second screw hole and a second guide hole, the second screw hole is threadedly matched with the second screw rod, the second guide hole is slidably matched with the second guide rod, and the slide is fixedly arranged on the second slider.

[0015] Furthermore, the third electric drive mechanism includes an electric telescopic rod, which is vertically arranged, with a lower end of the electric telescopic rod connected to the slide, and an upper end of the electric telescopic rod connected to the support seat.

[0016] Furthermore, the liquid supply mechanism includes an inflow hose, a driving pump, a return hose, a second control valve and a liquid tank. The liquid tank is fixedly arranged on the slide. One end of the inflow hose is connected to the liquid tank, and the other end is connected to the bottom of the flexible sac. One end of the return hose is connected to the bottom of the flexible sac, and the other end is connected to the liquid tank. The driving pump is provided on the inflow hose, and the second control valve is provided on the return hose.

[0017] Furthermore, the driving pump is a twin-screw pump.

[0018] Furthermore, the manual adjustment mechanism includes a sliding rod, a sliding seat, a first fastening bolt and a baffle. The front side of the support seat is provided with a plurality of sliding rods arranged in parallel and extending forward. The ends of the plurality of sliding rods are connected through the baffle. The sliding seat is provided with a plurality of sliding holes corresponding to the sliding rods one by one. The sliding seat is slidably arranged on the sliding rod through the sliding holes. The first fastening bolt is arranged on the sliding seat. The first fastening bolt is used to squeeze the sliding rod to fix the sliding seat.

[0019] Furthermore, the second manual adjustment mechanism includes an outer tube body, an inner rod body and a second fastening bolt, the outer tube body is fixedly arranged on the upper side of the slide seat, the front end of the elastic shield is provided with an avoidance opening, the upper end of the inner rod body passes through the avoidance opening and is fixedly connected to the deformation frame, the lower end of the inner rod body is inserted into the outer tube body, the second fastening bolt is arranged on the outer tube body, and the second fastening bolt is used to squeeze the inner rod body to fix the inner rod body.

[0020] Furthermore, the shear thickening fluid is SiO 2 The nanoparticles and polyethylene glycol were mixed into a shear thickening fluid, and 0.5% citric acid was added as a dispersion stabilizer.

[0021] Furthermore, the deformation frame is made of Nitinol shape memory alloy, and its austenite phase transition temperature is 33-35°C.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The device fixes the patient's head mainly through the joint action of the support seat and the top of the head fixing frame, which can prevent the patient's head from turning left and right, raising the head, lowering the head, etc., effectively limit the movement of the patient's head, and ensure the stability of the operation process.

[0024] 2. The support base and the top head fixation frame can be automatically moved in the front-to-back, left-to-right, and up-and-down directions, and the top head fixation frame can also be further manually fine-tuned, so it is easy to flexibly adjust according to the patient's head position and surgical needs to meet fixation requirements.

[0025] 3. A flexible capsule is provided on the inner concave surface of the support seat, and the flexible capsule is filled with a shear thickening fluid. This fluid has good fluidity at low shear rates and can adapt to the patient's head, neck and cheek curves to provide uniform support and limitation. At the same time, it quickly becomes viscous at high shear rates to form a rigid support, effectively limiting the deflection of the patient's head.

[0026] 4. The top of the head fixing frame adopts a memory alloy frame that expands when exposed to cold and contracts when exposed to body temperature. Combined with the sandwich cavity design of the elastic cover, the memory alloy frame is expanded by injecting low-temperature liquid, which is convenient for installation and removal. The body temperature triggers the contraction of the memory alloy frame to achieve adaptive tightening, which can adapt to the head shapes of different patients.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0029] Figure 1 It is an overall schematic diagram of the present invention;

[0030] Figure 2 It is a three-dimensional view of the slide portion of the present invention from a rear side perspective;

[0031] Figure 3 is a stereoscopic view of the front side view of the slide portion of the present invention;

[0032] Figure 4 is a three-dimensional diagram of the support seat portion of the present invention;

[0033] Figure 5 is a schematic cross-sectional view of the support seat portion of the present invention;

[0034] Figure 6 It is a schematic diagram of the top of the head fixing frame of the present invention;

[0035] Figure 7 is an exploded view of the deformable frame and the elastic shield of the present invention;

[0036] Figure 8 is a schematic cross-sectional view of the elastic shield of the present invention;

[0037] Fig. 9 yes Figure 8 Enlarged view of point A in the middle;

[0038] Fig.10 yes Figure 8 Enlarged view of point B in the middle.

[0039] Reference numerals:

[0040] 1. Operating table; 11. Base;

[0041] 2. Slide; 21. First electric drive mechanism; 211. First base; 212. First motor; 213. First screw rod; 214. First slider; 215. First guide rod; 22. Second electric drive mechanism; 221. Second base; 222. Second motor; 223. Second screw rod; 224. Second slider; 225. Second guide rod; 23. Third electric drive mechanism; 231. Electric telescopic rod;

[0042] 3. Support seat; 31. Flexible capsule; 32. Shear thickening fluid; 33. Liquid supply module; 331. Inflow hose; 332. Drive pump; 333. Return hose; 334. Second control valve; 335. Liquid tank;

[0043] 4. Overhead fixing frame; 41. Deformation frame; 42. Elastic shield; 43. Interlayer cavity; 44. Water supply pipe; 45. Drain pipe; 46. First control valve; 47. First manual adjustment mechanism; 471. Sliding rod; 472. Sliding seat; 473. First fastening bolt; 474. Baffle; 48. Second manual adjustment mechanism; 481. Outer tube body; 482. Inner rod body; 483. Second fastening bolt; 49. Pipe plug

[0044] 5. Main controller. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0049] like Figure 1-Figure 10 An ophthalmic surgical fixation device shown includes: an operating table 1, a slide 2, a support seat 3, an overhead fixing frame 4 and a main controller 5.

[0050] like Figure 1 and Figure 2As shown, a base 11 and a main controller 5 are provided at the head of the operating bed 1. The slide 2 is movably provided on the base 11, and a first electric drive mechanism 21 and a second electric drive mechanism 22 are provided on the base 11. The first electric drive mechanism 21 is used to drive the slide 2 to move forward and backward, and the second electric drive mechanism 22 is used to drive the slide 2 to move left and right. The support seat 3 is movably provided on the slide 2, and a third electric drive mechanism 23 is provided on the slide 2. The third electric drive mechanism 23 is used to drive the support seat 3 to move up and down. In this way, the movement of the support seat 3 in the front-to-back direction, the left-to-right direction, and the up-and-down direction can be realized, so that the spatial position of the support seat 3 can be flexibly adjusted to meet the support requirements for the patient's head.

[0051] The first electric drive mechanism 21, the second electric drive mechanism 22 and the third electric drive mechanism 23 are electrically connected to the main controller 5, respectively, so that the medical staff can control a certain electric drive mechanism to work through the main controller 5 to achieve automatic position adjustment of the support base 3 in the corresponding direction. The main controller 5 can be integrated with a display screen and control buttons to facilitate control interaction with the medical staff.

[0052] like Figure 2-Figure 5 As shown, the support seat 3 is an open annular seat which is concave downward as a whole. A flexible capsule 31 is fixedly provided on the entire inner concave surface of the support seat 3. A liquid supply module 33 is provided on the slide 2. The liquid supply module 33 is connected to the flexible capsule 31. The liquid supply module 33 is electrically connected to the main controller 5. The liquid supply module 33 is used to fill and discharge the shear thickening fluid 32 into the flexible capsule 31.

[0053] like Figure 3 As shown, the top of the head fixing frame 4 is movably arranged on the front side of the support base 3, and the support base 3 is provided with a first manual adjustment mechanism 47 and a second manual adjustment mechanism 48. The first manual adjustment mechanism 47 is used to adjust the front and back movement of the top of the head fixing frame 4, and the second manual adjustment mechanism 48 is used to adjust the left and right movement of the top of the head fixing frame 4. This facilitates manual fine-tuning of the position of the top of the head fixing frame 4, so that the top of the head fixing frame 4 can be more appropriately covered on the top of the patient's head.

[0054] like Figure 6-Figure 10 As shown, the head fixing frame 4 includes a deformable frame 41 and an elastic shield 42. The deformable frame 41 is a memory alloy frame that expands when exposed to cold and contracts when exposed to body temperature. The deformable frame 41 is an arc-shaped frame that is concave forward. The elastic shield 42 is fixed on the outside of the deformable frame 41 and can be deformed together with the deformable frame 41. The elastic shield 42 is hollow inside to form an interlayer cavity 43. A water supply pipe 44 is provided on the top of the elastic shield 42, and a drainage pipe 45 is provided on the bottom. The water supply pipe 44 and the drainage pipe 45 are respectively connected to the interlayer cavity 43, and a first control valve 46 is provided on the drainage pipe 45. The water supply pipe 44 can be a hard plastic pipe with a pipe plug 49 at the pipe mouth, and the drainage pipe 45 can be a hose.

[0055] Specifically, when the patient lies on his back on the operating table 1, in order to effectively fix the patient's head, it is necessary to prevent the patient's head from turning left and right, raising his head, lowering his head, etc. Therefore, the fixation of the patient's head by the device is mainly achieved through the joint action of the support seat 3 and the top of the head fixing frame 4.

[0056] For the support seat 3, if Figure 5 As shown, the inner concave surface of the support seat 3 is provided with a flexible bladder 31, and the flexible bladder 31 can be filled with a shear thickening fluid 32. The shear thickening fluid 32 is a non-Newtonian fluid, and its viscosity will increase significantly with the increase of shear rate or shear stress. This fluid exhibits good fluidity at low shear rates, and becomes very viscous at high shear rates, and even undergoes a solid-like transition, so it can be used to fix the patient's head.

[0057] As for the head fixing frame 4, its main structure, the deformable frame 41, is a memory alloy frame that expands when exposed to cold and contracts when exposed to body temperature. Therefore, when it is put on the top of the patient's head, the deformable frame 41 can be contracted by the patient's body temperature, thereby being clamped around the top of the patient's head for fixation. In addition, a hollow elastic shield 42 is provided on the outside of the deformable frame 41. The elastic shield 42 is elastic and can be deformed along with the deformable frame 41. At the same time, an interlayer cavity 43 is provided inside the deformable frame 41. Therefore, by pouring low-temperature water or other liquids into the interlayer cavity 43, the deformable frame 41 can be expanded when exposed to cold, thereby facilitating removal from the top of the patient's head.

[0058] When the device is in use, it can be specifically divided into three stages: preoperative preparation, intraoperative fixation, and postoperative release.

[0059] In the preoperative preparation stage, the patient lies on his back on the operating table 1. The medical staff can first close the first control valve 46, and then pour low-temperature water into the interlayer cavity 43 of the elastic shield 42 through the water supply pipe 44, so that the deformable frame 41 can be cooled and expanded. Subsequently, the medical staff controls the first electric drive mechanism 21, the second electric drive mechanism 22 and the third electric drive mechanism 23 through the main controller 5 to adjust the position of the slide 2. When the slide 2 moves, the support seat 3 and the top of the head fixing frame 4 will also move with it until the patient's head and neck can be supported on the concave support seat 3, the left and right cheeks are limited by the left and right side walls of the support seat 3, and the top of the patient's head extends into the top of the head fixing frame 4. At this time, the position of the top of the head fixing frame 4 can be further manually fine-tuned according to the actual situation, so that the top of the head fixing frame 4 can be more appropriately covered at the top of the patient's head.

[0060] After adjusting the positions of the support seat 3 and the top bracket 4, the liquid supply module 33 is turned on, and the shear thickening fluid 32 is slowly filled into the flexible capsule 31. At this time, the shear thickening fluid 32 is in liquid state, and the flexible capsule 31 will slowly expand. During the expansion process, the flexible capsule 31 will deform adaptively until it fits the patient's head and neck curved surface and cheek curved surface. At this time, the flexible capsule 31 is equivalent to a hydraulic cushion, and the support for the patient's head and neck and the limit of the cheek will be more uniform, without local high pressure, and the patient will feel more comfortable.

[0061] During the intraoperative fixation stage, the liquid supply module 33 is closed, the shear thickening fluid 32 is stopped, and the first control valve 46 is opened to drain the low-temperature water from the drain pipe 45. At this time, the deformable frame 41 will begin to shrink under the influence of the body temperature of the patient's head, so that it can be clamped on the patient's head for fixation. This method of using body temperature to trigger the shape memory effect of the memory alloy can achieve adaptive tightening, and can adapt to the size of different patients' head circumferences, automatically match the head shape, and has a wide range of applications.

[0062] During the operation, if the patient tries to raise or lower his head, he will not be able to perform the corresponding movement because the top of his head is limited by the deformable frame 41. If the patient's head suddenly deflects left or right, the shear thickening fluid 32 in the flexible capsule 31 will double its pressure viscosity, thereby quickly forming a rigid limiting support to limit the deflection of the patient's head.

[0063] During the postoperative loosening stage, the liquid supply module 33 discharges the shear thickening fluid 32 in the flexible capsule 31, and the flexible capsule 31 contracts and no longer limits the patient's cheek. The medical staff can then refill the elastic shield 42 with cold water, and the deformable frame 41 expands due to the cold and no longer holds the patient's head, and then the slide 2 can be removed.

[0064] Therefore, the device can effectively fix the patient's head during ophthalmic surgery, effectively limit the movement of the patient's head, and ensure the stability of the surgical process.

[0065] In practical applications, the shear thickening fluid 32 is SiO 2 The shear thickening fluid 32 is a mixture of nanoparticles and polyethylene glycol, and 0.5% citric acid is added as a dispersion stabilizer.

[0066] The deformation frame 41 is made of Nitinol memory alloy, and its austenite phase transition temperature is 33-35°C. This memory alloy is in a martensite state at a low temperature phase, and the alloy is superelastic and can be manually deformed and stretched to fit the head circumference. It is in an austenite state at a high temperature phase and can shrink to tighten the head. The austenite phase transition temperature of the Nitinol memory alloy is set by regulating the nickel / titanium atomic ratio and related heat treatment processes. This is a prior art and will not be described in detail.

[0067] In further settings, such as Figure 2 and Figure 3 As shown, the first electric drive mechanism 21 includes a first base 211, a first motor 212, a first screw rod 213, a first slider 214 and a first guide rod 215. The first base 211 is fixedly arranged on the base 11. The first base 211 is provided with a first screw rod 213 and a first guide rod 215 extending in the front-rear direction respectively. The first motor 212 is arranged on the first base 211 and is connected to the first screw rod 213 to drive the first screw rod 213 to rotate. The first slider 214 is provided with a first screw hole and a first guide hole. The first screw hole is threadedly matched with the first screw rod 213, and the first guide hole is slidably matched with the first guide rod 215. The second electric drive mechanism 22 includes a second base 221, a second motor 222, a second screw rod 223, a second slider 224 and a second guide rod 225. The second base 221 is fixedly arranged on the first slider 214. The second base 221 is provided with a second screw rod 223 and a second guide rod 225 extending in the front-rear direction respectively. The second motor 222 is arranged on the second base 221 and connected to the second screw rod 223 to drive the second screw rod 223 to rotate. The second slider 224 is provided with a second screw hole and a second guide hole. The second screw hole is threadedly matched with the second screw rod 223. The second guide hole is slidably matched with the second guide rod 225. The slide 2 is fixedly arranged on the second slider 224. The third electric drive mechanism 23 includes an electric telescopic rod 231. The electric telescopic rod 231 is vertically arranged. The lower end of the electric telescopic rod 231 is connected to the slide 2, and the upper end is connected to the support seat 3.

[0068] That is to say, the first electric drive mechanism 21 and the second electric drive mechanism 22 are electric screw mechanisms, and the rotation of the screws can drive the corresponding sliders to move linearly, thereby ultimately achieving the movement of the support seat 3 in the front-to-back direction and the left-to-right direction. The third electric drive mechanism 23 is an electric telescopic rod 231 mechanism, and the upward and downward movement of the support seat 3 can be achieved by the upward and downward extension of the electric telescopic rod 231. This movement realization method has a simple structure and is easy to operate.

[0069] like Figure 4 and Figure 5As shown, the liquid supply mechanism includes an inflow hose 331, a driving pump 332, a return hose 333, a second control valve 334 and a liquid tank 335. The liquid tank 335 is fixedly arranged on the slide 2. One end of the inflow hose 331 is connected to the liquid tank 335, and the other end is connected to the bottom of the flexible capsule 31. One end of the return hose 333 is connected to the bottom of the flexible capsule 31, and the other end is connected to the liquid tank 335. The inflow hose 331 is provided with a driving pump 332, and the return hose 333 is provided with a second control valve 334. Both the inflow hose 331 and the return hose 333 are hose-type designs, which will not affect the up and down movement of the support seat 3. The driving pump 332 is used to extract the shear thickening fluid 32 from the liquid tank 335, and then slowly pump it into the flexible capsule 31. When the second control valve 334 is opened, the shear thickening fluid 32 can slowly flow back to the liquid tank 335 from the return hose 333 at the bottom of the flexible capsule 31.

[0070] In practical applications, the driving pump 332 can be, for example, a twin-screw pump, and the two screws of the twin-screw pump can be designed to be non-contact meshing, and the shear rate is evenly distributed. This pump has good sealing performance and stable pressure, and is particularly suitable for high-viscosity fluids. In addition, a peristaltic pump or other device can also be used for pumping, which is not limited here.

[0071] like Figure 3 and Figure 4 As shown, the manual adjustment mechanism includes a slide bar 471, a slide seat 472, a first fastening bolt 473 and a baffle 474. A plurality of slide bars 471 arranged in parallel and extending forward are provided on the front side of the support seat 3. The ends of the plurality of slide bars 471 are connected by a baffle 474. A plurality of slide holes corresponding to the slide bars 471 are provided on the slide seat 472. The slide seat 472 is slidably arranged on the slide bar 471 through the slide holes. The first fastening bolt 473 is provided on the slide seat 472. When the slide seat 472 is slid back and forth, the front and rear position of the overhead fixing frame 4 can be adjusted. When the first fastening bolt 473 is tightened, the first fastening bolt 473 squeezes the slide bar 471 to fix the slide seat 472.

[0072] like Figure 6 and Figure 7 As shown, the second manual adjustment mechanism 48 includes an outer tube body 481, an inner rod body 482 and a second fastening bolt 483. The outer tube body 481 is fixedly arranged on the upper side of the slide seat 472. The front end of the elastic shield 42 is provided with an avoidance opening. The upper end of the inner rod body 482 passes through the avoidance opening and is fixedly connected to the deformation frame 41. The lower end of the inner rod body 482 is inserted into the outer tube body 481. The second fastening bolt 483 is arranged on the outer tube body 481. When the inner rod body 482 is slid up and down, the upper and lower positions of the overhead fixing frame 4 can be adjusted. When the second fastening bolt 483 is tightened, the second fastening bolt 483 squeezes the inner rod body 482 to fix the inner rod body 482, which is very convenient to use.

[0073] In summary, this device has the following characteristics:

[0074] 1. The fixation of the patient's head by the device is mainly achieved through the joint action of the support seat 3 and the top of the head fixing frame 4, which can prevent the patient's head from turning left and right, raising the head, lowering the head, etc., effectively limit the movement of the patient's head, and ensure the stability of the operation process.

[0075] 2. The support seat 3 and the top head fixing frame 4 can be automatically moved in the front-to-back direction, left-to-right direction, and up-down direction, and the top head fixing frame 4 can also be further manually fine-tuned, so it is convenient to flexibly adjust according to the patient's head position and surgical needs to meet the fixation requirements.

[0076] 3. A flexible capsule 31 is provided on the inner concave surface of the support seat 3, and a shear thickening fluid 32 is filled in the flexible capsule 31. This fluid has good fluidity at low shear rates and can adapt to the patient's head, neck and cheek curves to provide uniform support and positioning. At the same time, it quickly becomes viscous at high shear rates to form a rigid support, effectively limiting the deflection of the patient's head.

[0077] 4. The top of the head fixing frame 4 adopts a memory alloy frame that expands when exposed to cold and contracts when exposed to body temperature. Combined with the interlayer cavity 43 design of the elastic shield 42, the memory alloy frame is expanded by injecting low-temperature liquid, which is convenient for installation and removal, while the body temperature triggers the memory alloy frame to contract, achieving adaptive tightening, which can adapt to the head shapes of different patients.

[0078] Although a portion of the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations to these embodiments are within the scope of protection of the claims of the present invention without departing from the principles and purpose of the present invention.

Claims

1. An ophthalmic surgical fixation device, characterized in that: include: An operating table, wherein a base is provided at the head of the operating table; A slide, the slide is movably arranged on the base, and a first electric drive mechanism and a second electric drive mechanism are arranged on the base, the first electric drive mechanism is used to drive the slide to move forward and backward, and the second electric drive mechanism is used to drive the slide to move left and right; A support seat, the support seat is movably arranged on the slide, the slide is provided with a third electric drive mechanism, the third electric drive mechanism is used to drive the support seat to move up and down, the support seat is an open annular seat that is concave downward as a whole, a flexible capsule is fixedly arranged on the entire inner concave surface of the support seat, a liquid supply module is provided on the slide, the liquid supply module is connected to the flexible capsule, and the liquid supply module is used to fill and discharge the shear thickening fluid into the flexible capsule; A head-mounted fixing frame, the head-mounted fixing frame is movably arranged on the front side of the support seat, the support seat is provided with a first manual adjustment mechanism and a second manual adjustment mechanism, the first manual adjustment mechanism is used to adjust the head-mounted fixing frame to move forward and backward, and the second manual adjustment mechanism is used to adjust the head-mounted fixing frame to move left and right, the head-mounted fixing frame includes a deformation frame and an elastic shield, the deformation frame is a memory alloy frame that expands when exposed to cold and contracts when exposed to heat, the deformation frame is an arc-shaped frame that is concave forward, the elastic shield fixing cover is arranged on the outside of the deformation frame and can be deformed together with the deformation frame, the elastic shield is hollow inside to form a sandwich cavity, a water supply pipe is provided on the top of the elastic shield, and a drainage pipe is provided on the bottom, the water supply pipe and the drainage pipe are respectively connected to the sandwich cavity, and a first control valve is provided on the drainage pipe; A main controller is arranged at the head of the operating bed, and the first electric drive mechanism, the second electric drive mechanism, the third electric drive mechanism and the liquid supply module are electrically connected to the main controller respectively.

2. The ophthalmic surgical fixation device according to claim 1, characterized in that: The first electric drive mechanism includes a first base, a first motor, a first screw rod, a first slider and a first guide rod. The first base is fixed on the pedestal. The first base is provided with a first screw rod and a first guide rod extending in the front-rear direction respectively. The first motor is arranged on the first base and connected to the first screw rod to drive the first screw rod to rotate. The first slider is provided with a first screw hole and a first guide hole. The first screw hole is threadably matched with the first screw rod, and the first guide hole is slidably matched with the first guide rod.

3. The ophthalmic surgical fixation device according to claim 2, characterized in that: The second electric drive mechanism includes a second base, a second motor, a second screw rod, a second slider and a second guide rod. The second base is fixedly arranged on the first slider. The second base is provided with a second screw rod and a second guide rod extending in the front-rear direction respectively. The second motor is arranged on the second base and connected to the second screw rod to drive the second screw rod to rotate. The second slider is provided with a second screw hole and a second guide hole. The second screw hole is threadably matched with the second screw rod. The second guide hole is slidably matched with the second guide rod. The slide is fixedly arranged on the second slider.

4. The ophthalmic surgical fixation device according to claim 1, characterized in that: The third electric drive mechanism comprises an electric telescopic rod, which is arranged vertically, wherein the lower end of the electric telescopic rod is connected to the slide table, and the upper end of the electric telescopic rod is connected to the support seat.

5. The ophthalmic surgical fixation device according to claim 1, characterized in that: The liquid supply mechanism includes an inflow hose, a driving pump, a return hose, a second control valve and a liquid tank. The liquid tank is fixed on the slide. One end of the inflow hose is connected to the liquid tank, and the other end is connected to the bottom of the flexible sac. One end of the return hose is connected to the bottom of the flexible sac, and the other end is connected to the liquid tank. The driving pump is provided on the inflow hose, and the second control valve is provided on the return hose.

6. The ophthalmic surgical fixation device according to claim 5, characterized in that: The driving pump is a twin-screw pump.

7. The ophthalmic surgical fixation device according to claim 1, characterized in that: The manual adjustment mechanism includes a sliding rod, a sliding seat, a first fastening bolt and a baffle. The front side of the support seat is provided with a plurality of sliding rods arranged in parallel and extending forward. The ends of the plurality of sliding rods are connected through the baffle. The sliding seat is provided with a plurality of sliding holes corresponding to the sliding rods one by one. The sliding seat is slidably arranged on the sliding rod through the sliding holes. The first fastening bolt is arranged on the sliding seat. The first fastening bolt is used to squeeze the sliding rod to fix the sliding seat.

8. The ophthalmic surgical fixation device according to claim 1, characterized in that: The second manual adjustment mechanism includes an outer tube body, an inner rod body and a second fastening bolt. The outer tube body is fixedly arranged on the upper side of the slide seat. The front end of the elastic shield is provided with an escape opening. The upper end of the inner rod body passes through the escape opening and is fixedly connected to the deformation frame. The lower end of the inner rod body is inserted into the outer tube body. The second fastening bolt is arranged on the outer tube body. The second fastening bolt is used to squeeze the inner rod body to fix the inner rod body.

9. The ophthalmic surgical fixation device according to claim 1, characterized in that: The shear thickening fluid is a shear thickening fluid mixed with SiO2 nanoparticles and polyethylene glycol, and 0.5% of citric acid is added as a dispersion stabilizer.

10. The ophthalmic surgical fixation device according to claim 1, characterized in that: The deformation frame is made of Nitinol shape memory alloy, and its austenite phase transition temperature is 33-35°C.

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