Head fixing device for ophthalmologic operation

Abstract

The invention discloses a head fixing device for ophthalmologic operations, and particularly relates to the technical field of head fixing devices for ophthalmologic operations, the head fixing device comprises a base, inclined tables are fixedly connected to the left side and the right side of the upper end of the base, and sliding rails are fixedly mounted on the inner sides of two supporting rods located on the left side and the inner sides of two supporting rods located on the right side; a lower jaw limiting assembly is jointly slidably mounted on the lower portions of the outer surfaces of the two sliding rails, and a head limiting assembly is fixedly mounted on the front portions of the lower sides of the outer surfaces of the two sliding rails. According to the head fixing device for the ophthalmologic operation, the lower jaw limiting assembly is arranged, the lower jaw position of a patient is limited in an abutting mode in the using process, the lower jaw limiting assembly is adjusted so that fitting limiting can be conducted according to different angles of the lower jaw, and meanwhile the head limiting assembly is arranged, so that the head fixing device is more convenient to use. The forehead and the back side of the head of the patient can be limited and fixed after the lower jaw limiting assembly is aligned and limited.

Description

Technical Field

[0001] This invention relates to the field of head fixation devices for ophthalmic surgery, and particularly to a head fixation device for ophthalmic surgery. Background Technology

[0002] A head stabilization device for ophthalmic surgery is a medical device specifically designed for ophthalmic surgery. Its main function is to help patients keep their heads stable during the procedure, ensuring the precision and safety of the surgery. These devices typically include a head support system and adjustment mechanisms, which can use pads, support straps, or similar structures to stabilize the patient's head in a predetermined position, avoiding errors caused by head instability during the procedure.

[0003] In ophthalmic surgery, especially procedures involving delicate manipulation of the eye's structures (such as cataract and retinal surgery), patient head stability is crucial. By fixing the head at a specific angle or position, surgeons can achieve greater precision and reduce the risks associated with head movement during surgery. Furthermore, fixation devices are typically designed to be adjustable to accommodate different head sizes and surgical needs.

[0004] However, existing head immobilization devices still have some shortcomings in use. First, while they can effectively immobilize the patient's head, patients often experience discomfort during the immobilization process, resulting in low comfort levels. Second, many existing devices fail to effectively limit and immobilize the patient's jaw when immobilizing the head, which may affect the overall stability of the head. Finally, existing immobilization devices lack sufficient support for the neck, and prolonged use may lead to neck discomfort or fatigue, especially during long surgical procedures.

[0005] Chinese Patent Publication No. CN211985889U discloses a head fixation device for ophthalmic surgery, including a telescopic rod, a fixing mechanism, a base, and an adjustment mechanism. The fixing mechanism is fixedly installed on both sides of the base. A third threaded rod is hinged to the inside of the base via bearings, and a hand crank is fixedly connected to one end of the third threaded rod. A first movable seat is hinged to the third threaded rod, and a fixing plate is fixedly installed on the top of the first movable seat via screws. This invention allows the adjustment bolt to move by rotating an adjusting bolt. One end of the adjusting bolt is connected to a fourth threaded rod, which has an external thread and an internal thread. The external and internal threads mesh with each other, thus moving the fourth threaded rod. A second fixing block is installed at the other end of the fourth threaded rod, which moves along with a second rubber pad. The second fixing block then adjusts the height of the patient's head, achieving the purpose of adjusting the patient's head height.

[0006] While the device described in the aforementioned patent documents can effectively limit and fix the patient's head during use, it lacks a support and restraint device for the patient's jaw and neck, thereby reducing the overall comfort of the device. Summary of the Invention

[0007] The main objective of this invention is to provide a head fixation device for ophthalmic surgery, which can effectively solve the problems in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A head fixation device for ophthalmic surgery includes a base. Inclined platforms are fixedly connected to the upper left and right sides of the base. Placement platforms for limbs are fixedly connected to the ends of the two inclined platforms that are far apart from each other. Support rods for support are fixedly connected to the front and rear of the ends of the two inclined platforms that are far apart from each other. A reclining board made of latex material is fixedly installed in the middle of the upper part of the base. Guide rails for guidance and fixation are fixedly installed on the inner sides of the two support rods on the left and the two support rods on the right. A mandibular limiting component for limiting the patient's chin is slidably installed on the lower outer surface of the two slide rails. A head limiting component for limiting the patient's forehead and neck is fixedly installed on the front lower side of the two slide rails.

[0010] Preferably, the mandibular limiting component includes two L-shaped plates. The upper ends of the horizontal portions of the two L-shaped plates are electrically connected to the lower end of the slide rail on the same side. A hollow plate is fixedly connected to one end of the two L-shaped plates that are close to each other. A slider with a concave front end is slidably connected to the inner surface of the hollow plate. Three springs are fixedly connected to the rear end of the slider and the front side wall of the inner surface of the hollow plate that are close to each other. A convex plate is rotatably connected to the concave front end of the slider. An arc-shaped plate made of silicone material is fixedly connected to the front end of the convex plate. A support groove matching the width of the mandible is opened in the middle of the front side of the arc-shaped plate. Engaging components are fixedly installed at both ends of the slider.

[0011] Preferably, the engaging assembly includes an extension plate fixedly connected to the middle of the front side of the right end of the slider. The middle of the front side of the right end of the extension plate has a circular hole for placing a ring. The left end of the ring is fixedly connected to the protruding plate. An octagonal groove is formed on the right end of the ring. An octagonal prism that cooperates with the octagonal groove is inserted into the inner surface of the octagonal groove. A knob is fixedly connected to the right end of the octagonal prism. Several insert plates are fixedly connected in a circular array on the outer side of the left end of the knob. A slot that cooperates with the several insert plates is formed on the right end of the extension plate.

[0012] Preferably, the head limiting assembly includes a limiting plate, the lower end of which is fixedly connected to the front upper part of the base. Two connecting plates are provided on the rear side of the limiting plate. A motor is fixedly connected to the rear end of the limiting plate. The output end of the motor is fixedly connected via a coupling to a rotating rod with a threaded upper surface. The upper surface of the rotating rod is threadedly connected to the inner side of the upper connecting plate, and the lower surface of the rotating rod is rotatably connected to the inner side of the lower connecting plate. The upper end of the rotating rod passes through the upper connecting plate and rotates. A fixed plate is connected, with its lower end fixedly connected to the upper end of the slide rails on both sides. A circular arc plate is fixedly connected to the rear end of each of the two connecting plates. The two circular arc plates are symmetrically distributed vertically. Support blocks are fixedly connected to the left and right sides of the outer arc surfaces of the two circular arc plates. Several guide posts penetrating the inner arc surfaces of the two circular arc plates are inserted on the side of the two circular arc plates that are far apart from each other. A circular arc plate is provided on the side of the inner arc surfaces of the two circular arc plates that are close to each other. The outer arc surfaces of the circular arc plates on the same side are fixedly connected to several guide posts on the same side.

[0013] Preferably, a plurality of springs are fixedly connected in a linear array on the side where the outer arc surface of the second arc plate on the same side and the inner arc surface of the first arc plate on the same side are close to each other, and the plurality of springs on the same side are respectively located on the outside of the plurality of guide posts on the same side.

[0014] Preferably, the connecting plate located on the upper side is slidably connected to the rear end of the limiting plate, and the connecting plate located on the lower side is fixedly connected to the rear end of the limiting plate.

[0015] Preferably, the two support blocks located on the upper side are telescopically oriented.

[0016] Preferably, the upper front part of the base has several entry holes, and several guide posts located on the lower side are slidably connected to the inner surfaces of several entry holes. The bottom walls of several entry holes are jointly provided with a hollow groove. The upper front part of the base is fixedly connected to a cavity box with an internal cavity. The cavity box is located in front of the lying board. A top block is slidably connected to the inner cavity of the cavity box. A support plate that cooperates with the neck is fixedly connected to the upper end of the top block.

[0017] Preferably, the cavity of the cavity box communicates with the slot.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention, through the design of the mandibular limiting component, can, during use, restrict and limit the position of the patient's mandible after the patient lies on the base. The mandibular limiting component is also adjustable to fit and limit the mandible according to different angles. At the same time, through the design of the head limiting component, after the mandibular limiting component limits the lower part, the forehead and back of the head of the patient can be limited and fixed. Therefore, the mandibular limiting component and the head limiting component work together to fix the patient's head without obstructing the space for surgical operations on the eyes.

[0020] 2. The present invention, through the head limiting component, can limit and fix the patient's forehead and back of the head. When the head is placed on the upper side of the head limiting component, the head limiting component can also lift the patient's neck, thereby improving the overall comfort when fixing the patient's head. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a top view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the overall structure of the present invention in another state;

[0024] Figure 4 This is a side view of the overall structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the overall structure of the mandibular limiting component of the present invention;

[0026] Figure 6 This is a partial cross-sectional view of the mandibular limiting component of the present invention;

[0027] Figure 7 This is a schematic diagram of the overall structure of the head limiting component of the present invention;

[0028] Figure 8 This is a side view of the head restraint assembly of the present invention;

[0029] Figure 9 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0030] Figure 10 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B.

[0031] In the diagram: 1. Base; 2. Inclined platform; 3. Placement platform; 4. Support rod; 5. Reclining plate; 6. Slide rail; 7. Jaw limiting assembly; 71. L-shaped plate; 72. Hollow plate; 73. Slider; 74. Spring 1; 75. Convex plate; 76. Arc plate; 77. Engaging assembly; 771. Extension plate; 772. Circular hole; 773. Ring; 774. Octagonal groove; 775. Knob; 776. Octagonal prism; 777. Insert plate; 8. Head limiting assembly; 81. Limiting plate; 82. Connecting plate; 83. Rotating rod; 84. Motor; 85. Fixing plate; 86. Arc plate 1; 87. Support block; 88. Guide post; 89. Arc plate 2; 80. Spring 2; 802. Hollow groove; 803. Entry hole; 804. Hollow box; 805. Top block; 806. Support plate. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] Example 1, as Figure 1 and Figure 2 As shown, a head fixation device for ophthalmic surgery includes a base 1. Inclined platforms 2 are fixedly connected to the upper left and right sides of the base 1. Placement platforms 3 for limbs are fixedly connected to the ends of the two inclined platforms 2 that are far apart from each other. Support rods 4 for support are fixedly connected to the front and rear of the ends of the two inclined platforms 2 that are far apart from each other. A reclining board 5 made of latex material is fixedly installed in the middle of the upper part of the base 1. Guide rails 6 are fixedly installed inside the two support rods 4 on the left and the two support rods 4 on the right. A mandibular limiting component 7 for limiting the patient's chin is slidably installed on the lower outer surface of the two slide rails 6. A head limiting component 8 for limiting the patient's forehead and neck is fixedly installed on the front lower outer surface of the two slide rails 6.

[0034] The aforementioned reclining board 5 is made of latex material, which is a material in the prior art. In this solution, this is to improve the comfort of the patient lying on the upper part of the reclining board 5. Latex has good toughness, so that the patient will not feel uncomfortable when lying on the upper part of the reclining board 5 because the reclining board 5 is too hard.

[0035] The specific installation methods and material properties of the latex materials mentioned above are all conventional designs in existing technologies, therefore this solution will not elaborate on them further.

[0036] During use, when the patient lies on the upper side of the reclining board 5 and then places their head inside the head limiting component 8, the head limiting component 8 can be activated to fix the position of the patient's forehead and back of the head, preventing the patient's head from moving around, thus facilitating subsequent eye surgery. At the same time, the chin limiting component 7 can be moved to the patient's chin position from the lower side of the two slide rails 6. When it moves to the patient's chin position, the angle of the chin limiting component 7 can be adjusted so that the chin limiting component 7 can completely fit the patient's chin, thereby limiting the entire head of the patient. At the same time, while fixing the patient's forehead and back of the head, the head limiting component 8 can also support the back of the patient's neck, thereby improving the patient's overall comfort during surgery.

[0037] Example 2, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 10 As shown, this embodiment includes two L-shaped plates 71. The upper ends of the horizontal portions of the two L-shaped plates 71 are electrically connected to the lower end of the slide rail 6 on the same side. The ends of the two L-shaped plates 71 that are close to each other are fixedly connected to a hollow plate 72. A slider 73 with a concave front end is slidably connected to the inner surface of the hollow plate 72. Three springs 74 are fixedly connected to the rear end of the slider 73 and the front side wall of the inner surface of the hollow plate 72 that are close to each other. A convex plate 75 is rotatably connected to the concave front end of the slider 73. An arc-shaped plate 76 made of silicone material is fixedly connected to the front end of the convex plate 75. A support groove matching the width of the lower jaw is opened in the middle of the front side of the arc-shaped plate 76. Engaging components 77 are fixedly installed at both ends of the slider 73.

[0038] Furthermore, the engaging assembly 77 includes an extension plate 771 fixedly connected to the middle of the front side of the right end of the slider 73. The middle of the front side of the right end of the extension plate 771 has a circular hole 772 for placing the ring 773. The left end of the ring 773 is fixedly connected to the protrusion 75. The right end of the ring 773 has an octagonal groove 774. An octagonal prism 776 that cooperates with it is inserted into the inner surface of the octagonal groove 774. A knob 775 is fixedly connected to the right end of the octagonal prism 776. Several insert plates 777 are fixedly connected to the outer side of the left end of the knob 775 in a circular array. The right end of the extension plate 771 has a slot that cooperates with the several insert plates 777.

[0039] The two L-shaped plates 71 mentioned above are electrically connected to the lower end of the slide rail 6 on the same side. In this solution, it is only necessary to ensure that when the L-shaped plate 71 needs to be controlled, it can slide at the lower end of the slide rail 6 after being powered on. The specific installation method, circuit connection method and control method are all conventional designs, so this solution will not elaborate on them in detail.

[0040] During use, the patient first lies on the upper part of the reclining board 5, then places their head inside the head limiting component 8. Next, the locking components 77 on both sides are pulled out. The two L-shaped plates 71 are then activated to move the hollow plate 72 toward the patient's chin. As the hollow plate 72 moves the slider 73, the arc plate 76 gradually approaches the patient's chin, causing the spring 74, which is fixedly connected to the convex plate 75, to gradually move closer to it. When the arc plate 76 moves to the patient's chin, the patient's jaw fits into the support groove at the front end of the arc plate 76. The convex plate 75, which is fixedly connected to the rear end of the arc plate 76, is rotatably connected to the concave part at the front end of the slider 73. Therefore, the angle of the convex plate 75 can be adjusted to make the arc plate 76 fit the patient's jaw more closely.

[0041] When the adjustment is complete, hold the knob 775 and insert the octagonal prism 776 into the octagonal groove 774, and at the same time insert several insert plates 777 into the slots on the same side. Since the ring 773 is fixedly connected to the convex plate 75 and the ring 773 is placed in the inner cavity of the round hole 772, the insert plates 777 and the octagonal prism 776 can simultaneously limit and fix the convex plate 75, thereby achieving the purpose of limiting and fixing the position of the patient's mandible.

[0042] The reason for making the curved plate 76 out of silicone material is that when the curved plate 76 supports the patient's chin, the silicone material can prevent the patient's chin from being scratched. At the same time, the silicone material also has a certain degree of flexibility, so it can provide sufficient cushioning effect to protect the patient's chin position.

[0043] Silicone is a conventional material in existing technology, and its specific properties and hardness can be adjusted according to actual production needs. Therefore, this solution will not elaborate on it in detail.

[0044] Example 3, see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 9As shown, this embodiment includes a limiting plate 81. The lower end of the limiting plate 81 is fixedly connected to the front of the upper end of the base 1. Two connecting plates 82 are provided on the rear side of the limiting plate 81. The upper connecting plate 82 is slidably connected to the rear end of the limiting plate 81, and the lower connecting plate 82 is fixedly connected to the rear end of the limiting plate 81. A motor 84 is fixedly connected to the rear end of the limiting plate 81. The output end of the motor 84 is fixedly connected to a rotating rod 83 with a threaded upper surface through a coupling. The upper surface of the rotating rod 83 is threadedly connected to the inner side of the upper connecting plate 82, and the lower surface of the rotating rod 83 is rotatably connected to the inner side of the lower connecting plate 82. The upper end of the rotating rod 83 passes through the upper connecting plate 82 and is rotatably connected to a fixing plate 85. The lower end of the fixing plate 85 is fixedly connected to the upper end of the slide rails 6 on both sides. Both connecting plates 82 have a fixed arc plate 86 at their rear ends. The two arc plates 86 are symmetrically distributed vertically. Support blocks 87 are fixedly connected to the left and right sides of the outer arc surfaces of the two arc plates 86. The two support blocks 87 on the upper side are telescopic. Several guide posts 88 penetrating the inner arc surfaces of the two arc plates 86 are inserted on the side of the two arc plates 86 that are far apart from each other. Arc plates 89 are provided on the side of the inner arc surfaces of the two arc plates 86 that are close to each other. The outer arc surfaces of the arc plates 89 on the same side are fixedly connected to several guide posts 88 on the same side. Several springs 80 are fixedly connected in a linear array on the side of the outer arc surfaces of the arc plates 89 and the inner arc surfaces of the arc plates 86 on the same side that are close to each other. The springs 80 on the same side are located outside the guide posts 88 on the same side.

[0045] Furthermore, the upper front of the base 1 has several entry holes 803, and several guide posts 88 located on the lower side are slidably connected to the inner surfaces of the several entry holes 803. The bottom walls of the several entry holes 803 are all provided with a slot 802. The upper front of the base 1 is fixedly connected to a cavity box 804 with an internal cavity. The cavity box 804 is located in front of the lying plate 5. The cavity of the cavity box 804 communicates with the slot 802. The cavity of the cavity box 804 is slidably connected to a top block 805. The upper end of the top block 805 is fixedly connected to a support plate 806 that cooperates with the neck.

[0046] During use, when the patient lies on the upper side of the reclining board 5, and the arc-shaped plate 76 is attached to the patient's chin, the back of the patient's head is placed on the inner arc surface of the lower arc plate 89, so that the back of the head presses the lower arc plate 89 downward. When the lower arc plate 89 is pressed downward, it can simultaneously drive the guide post 88, which is fixedly connected to it, to move into the inner cavity of the inlet hole 803. The inlet hole 803 is connected to the inner cavity of the slot 802, and the slot 802 is connected to the inner cavity of the cavity box 804. Under the action of the top block 805, the whole is formed into a sealed chamber. When the guide post 88 enters into the inlet hole 803, it changes the air pressure of the slot 802, so that the gas rises from the inner cavity of the cavity box 804 and pushes the top block 805 up, so that the top block 805 drives the support plate 806, which is fixedly connected to it, to fit against the back of the patient's neck.

[0047] Then, by starting the motor 84, the output end of the motor 84 drives the rotating rod 83, which is fixedly connected to it, to rotate through the coupling. When the rotating rod 83 rotates, since the upper part of its outer surface is threaded and is threadedly connected to the upper connecting plate 82, and the upper connecting plate 82 is slidably connected to the rear end of the limiting plate 81, the connecting plate 82 can move downward. When the upper connecting plate 82 moves downward, since the two support blocks 87 at the top are telescopic, the connecting plate 82 can drive the arc plate 86, which is fixedly connected to it, to move downward. This causes the inner arc surface of the upper arc plate 89 to fit against the patient's forehead. The upper arc plate 89 can compress and shrink the spring 80 on the same side, and cause the guide post 88 to move upward.

[0048] With the forehead, back of the head, neck, and jaw all fixed in place, the patient's head cannot move on its own, thus allowing for surgical procedures to be performed on the patient's eyes.

[0049] The two support blocks 87 located on the upper side mentioned above are conventional settings in the prior art. In this solution, it is only necessary to ensure that the arc plate 86 located on the upper side can extend and retract when it moves up and down. Therefore, its specific installation method and shape are conventional designs in the prior art, and this solution will not elaborate on them in detail.

[0050] It should be noted that the specific installation method, circuit connection method, and control method of the motor 84 used in this invention are all conventional designs, and will not be described in detail here.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A head fixation device for ophthalmic surgery, comprising a base (1), characterized in that: The base (1) is fixedly connected to the left and right sides of the upper end of the base (1). The two tilting platforms (2) are fixedly connected to the ends of the two tilting platforms (2) that are far apart from each other, and the two tilting platforms (2) are fixedly connected to the front and rear parts of the ends of the two tilting platforms (2) that are far apart from each other, and the base (1) is fixedly installed with a reclining board (5) made of latex material. The two support rods (4) on the left and the two support rods (4) on the right are fixedly installed with guide rails (6). The two slide rails (6) are slidably installed together on the lower part of the outer surface of the two slide rails (6) for limiting the patient's chin. The two slide rails (6) are fixedly installed on the front part of the lower part of the outer surface of the two slide rails (6) for limiting the patient's forehead and neck.

2. The head fixation device for ophthalmic surgery according to claim 1, characterized in that: The mandibular limiting component (7) includes two L-shaped plates (71). The upper ends of the horizontal portions of the two L-shaped plates (71) are electrically connected to the lower end of the slide rail (6) on the same side. The two L-shaped plates (71) are fixedly connected to a hollow plate (72) at their close ends. A slider (73) with a concave front end is slidably connected to the inner surface of the hollow plate (72). Three springs (74) are fixedly connected to the rear end of the slider (73) and the front side wall of the inner surface of the hollow plate (72) at their close ends. A convex plate (75) is rotatably connected to the concave front end of the slider (73). An arc-shaped plate (76) made of silicone material is fixedly connected to the front end of the convex plate (75). A support groove matching the width of the mandible is opened in the middle of the front side of the arc-shaped plate (76). Engaging components (77) are fixedly installed at both ends of the slider (73).

3. The head fixation device for ophthalmic surgery according to claim 2, characterized in that: The engaging assembly (77) includes an extension plate (771) fixedly connected to the middle of the front side of the right end of the slider (73). The middle of the front side of the right end of the extension plate (771) has a circular hole (772) for placing a ring (773). The left end of the ring (773) is fixedly connected to the protruding plate (75). The right end of the ring (773) has an octagonal groove (774). An octagonal prism (776) that cooperates with the octagonal groove (774) is inserted into the inner surface of the octagonal groove (774). A knob (775) is fixedly connected to the right end of the octagonal prism (776). Several insert plates (777) are fixedly connected to the outer side of the left end of the knob (775) in a circular array. The right end of the extension plate (771) has a slot that cooperates with the several insert plates (777).

4. The head fixation device for ophthalmic surgery according to claim 1, characterized in that: The head limiting assembly (8) includes a limiting plate (81). The lower end of the limiting plate (81) is fixedly connected to the front upper part of the base (1). Two connecting plates (82) are provided on the rear side of the limiting plate (81). A motor (84) is fixedly connected to the rear end of the limiting plate (81). The output end of the motor (84) is fixedly connected to a rotating rod (83) with a threaded upper surface through a coupling. The upper surface of the rotating rod (83) is threadedly connected to the inner side of the upper connecting plate (82). The lower surface of the rotating rod (83) is rotatably connected to the inner side of the lower connecting plate (82). The upper end of the rotating rod (83) passes through the upper connecting plate (82) and rotates. A fixed plate (85) is connected to the movable connection. The lower end of the fixed plate (85) is fixedly connected to the upper end of the slide rails (6) on both sides. The rear ends of the two connecting plates (82) are fixedly connected to arc plate one (86). The two arc plates one (86) are symmetrically distributed vertically. Support blocks (87) are fixedly connected to the left and right sides of the outer arc surface of the two arc plates one (86). Several guide posts (88) penetrating the inner arc surface are inserted on the side of the two arc plates one (86) that are far apart from each other. Arc plate two (89) is provided on the side of the inner arc surface of the two arc plates one (86) that are close to each other. The outer arc surface of the arc plate two (89) on the same side is fixedly connected to several guide posts (88) on the same side.

5. The head fixation device for ophthalmic surgery according to claim 4, characterized in that: Several springs (80) are fixedly connected in a linear array on the side where the outer arc surface of the arc plate II (89) and the inner arc surface of the arc plate I (86) on the same side are close to each other. The several springs (80) on the same side are located on the outside of the several guide posts (88) on the same side.

6. The head fixation device for ophthalmic surgery according to claim 4, characterized in that: The upper connecting plate (82) is slidably connected to the rear end of the limiting plate (81), and the lower connecting plate (82) is fixedly connected to the rear end of the limiting plate (81).

7. The head fixation device for ophthalmic surgery according to claim 6, characterized in that: The two support blocks (87) located on the upper side are telescopically oriented.

8. The head fixation device for ophthalmic surgery according to claim 7, characterized in that: The upper front of the base (1) has several entry holes (803), and several guide posts (88) located on the lower side are slidably connected to the inner surfaces of the several entry holes (803). The bottom walls of the several entry holes (803) are provided with a slot (802). The upper front of the base (1) is fixedly connected to a cavity box (804) with an internal cavity. The cavity box (804) is located in front of the lying board (5). The cavity of the cavity box (804) is slidably connected to a top block (805). The upper end of the top block (805) is fixedly connected to a support plate (806) that cooperates with the neck.

9. A head fixation device for ophthalmic surgery according to claim 8, characterized in that: The cavity of the cavity box (804) is connected to the cavity slot (802).

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