CN117860475A - Expander for ophthalmic surgery - Google Patents

Abstract

The invention discloses an expanding device for ophthalmic surgery, which comprises a base and a positioning pillow fixed on the base, wherein four telescopic rods which are symmetrically distributed in pairs are vertically fixed on the upper surface of the base, mounting seats are jointly fixed at the top ends of two adjacent telescopic rods in front and back, four expanding rods which are positioned above the base and symmetrically distributed in pairs are arranged between the two mounting seats, and an adjusting assembly for driving the expanding rods is arranged above the base. According to the invention, the adjusting assembly is arranged so as to drive the expansion supporting rods to move along the horizontal direction, so that the positions of the four expansion supporting rods can be adjusted according to eye distances of different patients; through setting up and expanding the support subassembly to four expansion poles of simultaneous drive, let two front and back adjacent expansion poles to move in opposite directions, with patient's upper eyelid and lower eyelid expansion, need not to adjust every expansion pole alone, the holistic work efficiency of device has been improved, and the convenience.

Description

Expander for ophthalmic surgery

Technical Field

The invention relates to the technical field of medical treatment, in particular to an expander for ophthalmic surgery.

Background

The general term "eye disease department" refers to the discipline of studying diseases related to the visual system, including the eyeball and its associated tissues. Ophthalmic diseases such as vitreous and retina diseases, ocular optics, glaucoma, optic neuropathy, cataract and the like are commonly studied by ophthalmology.

The expander, namely the eyelid retractor, is an instrument for expanding the eyelid of a patient during eye surgery so as to facilitate the surgery, is beneficial to expanding the surgery field and is an indispensable medical instrument in the ophthalmic surgery.

The lower eyelid is hooked and spread by a spreading device, the lock bar is rotated to downwards move, the lock block at the lower end of the lock bar is abutted against the limit block, the limit block is moved to two sides and separated, the saw teeth are separated from the saw tooth surface, the locking state of the front and back sliding of the push bar is released, when the lock bar is rotated to upwards move, the lock block at the lower end of the lock bar drives the sleeve column to upwards move, the lower end of the sleeve column is separated from the stupefied tooth of the limit block, the push bar can vertically deflect in the first through groove, the lower eyelid is flexibly hooked and spread by the operation, after the lower eyelid moves to a target position, the lock bar is rotated to the original position, the push bar is fixed, the limit block is abutted against the side face of the push bar under the action of the elasticity of the first spring, the saw teeth are meshed with the saw tooth surface, the sleeve column is abutted against the limit block under the action of self gravity and the action of the second spring, and meshed with the stupefied tooth, and when the eyelid is hooked, the eyelid is pulled and lifted by the suction head, the eyelid is pulled and the auxiliary to spread the eyelid; when the upper eyelid is hooked, the eyes of a patient are closed, then the upper eyelid is lifted by a suction head, and then the upper eyelid is hooked and spread by a spreading plate.

Although the device realizes the effect of opening the eyelids of the patient, the upper eyelid and the lower eyelid of the two eyes of the patient need to be operated separately, and the whole structure is relatively complicated to operate.

Thus we propose an expander for ophthalmic surgery which solves the above problems.

Disclosure of Invention

The invention aims to provide an expanding device for ophthalmic surgery, which is convenient for driving expanding rods to move along the horizontal direction by arranging an adjusting component, so that the positions of four expanding rods can be adjusted according to eye distances of different patients; through setting up and expanding the support subassembly to four expansion poles of drive simultaneously, let two front and back adjacent expansion poles to the opposite direction remove, expand patient's upper eyelid and lower eyelid, need not to adjust every expansion pole alone, effectually improved the holistic work efficiency of device, and the convenience, solved the upper eyelid and the lower eyelid of patient's both eyes and all need separate the operation, the comparatively complicated problem of overall structure operation.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an ophthalmic surgery expands and props ware, includes the base to and fix the location pillow on the base, base upper surface vertical fixation has four two symmetrical distribution's telescopic links, and the top of two adjacent telescopic links is fixed with the mount pad jointly around, two be provided with four expansion poles that lie in base top and two symmetrical distribution between the mount pad, the base top is provided with the adjusting part that is used for driving expansion pole, through setting up adjusting part to the drive expansion pole is along the horizontal direction removal, makes four expansion pole's position can be adjusted according to different patient's eye distance, thereby has improved the holistic suitability of device effectively.

Preferably, the adjusting component comprises a rotating shaft which is rotationally connected between two mounting seats, a first threaded rod which is symmetrically distributed is sleeved on the rotating shaft, a bearing seat which is in threaded connection with the threaded rod is sleeved on one surface of the first threaded rod, a limiting rod which penetrates through the two bearing seats and is mutually parallel to the rotating shaft is fixedly connected between the mounting seats, each two expansion supporting rods corresponds to one of the bearing seats, and the directions of threads on one surface of the two threaded rods are opposite.

Preferably, one of the mounting seats is inserted with a spline shaft on the upper surface, one end of the spline shaft positioned in the mounting seat is fixedly provided with a cylindrical rack, an annular shaft is connected in the mounting seat in a rotating manner, one end of the annular shaft is fixedly connected with a gear I and a ratchet wheel which are integrally formed, and the gear I is meshed with the cylindrical rack.

Preferably, the surface of the rotating shaft is connected with two movable rods in a telescopic manner, the upper ends of the two rotating shafts are fixedly connected with ratchets together, and springs sleeved on the surfaces of the movable rods are fixedly connected between the ratchets and the rotating shafts.

Preferably, two expansion rods which are adjacent front and back are driven to move in opposite directions above the base, and an expansion assembly for expanding the upper eyelid and the lower eyelid of a patient is arranged, so that four expansion rods are driven simultaneously, the two expansion rods which are adjacent front and back move in opposite directions, the upper eyelid and the lower eyelid of the patient are expanded, each expansion rod does not need to be independently regulated, and the overall working efficiency and convenience of the device are effectively improved; the expanding and supporting assembly comprises a second gear sleeved on the surface of the spline shaft, two symmetrically distributed U-shaped plates are fixedly connected to the upper surface of the mounting seat, and the edge of the second gear is movably connected in the U-shaped plates.

Preferably, the upper surface of the mounting seat is rotationally connected with a gear III which is meshed with the gear II, and a threaded rod II which is positioned above the gear III and is coaxially fixed with the gear III, the surface of the threaded rod II is sleeved with a rectangular internal thread sleeve which is in threaded connection with the threaded rod II, the upper surface of the mounting seat is vertically fixed with a vertical rod which penetrates through the rectangular internal thread sleeve, and the surface of the rectangular internal thread sleeve is fixedly connected with a bending rod.

Preferably, the two bearing seat surfaces are all connected with rectangular blocks in a sliding manner, two rectangular plates are sleeved on the bending rods, two gears II are fixedly connected with the lower surfaces of the rectangular plates, inclined surface grooves which are mutually matched with the inclined surface rods are formed in the rectangular blocks, strip-shaped grooves for the inclined surface rods to pass through are formed in the bearing seat surfaces, the four expansion supporting rods are respectively and fixedly mounted on the side walls of the four rectangular blocks, and the inclined angles of the front inclined surface rod and the rear inclined surface rod are different.

Preferably, the telescopic link includes the body of rod first of perpendicular fixed at the base upper surface to and flexible grafting is at body of rod second on body of rod top, be provided with the lifting unit who is used for driving the expansion link along vertical direction and removes to patient's eyes directly over in the mount pad.

Preferably, the lifting assembly comprises a threaded rod III which is rotationally connected in one rod body I, one end of the rod body II, which is positioned in the rod body I, is inserted with a circular internal thread sleeve, the threaded rod III penetrates through the circular internal thread sleeve and is in threaded connection with the circular internal thread sleeve, a movable groove is formed in the inner wall of the rod body I, and a slide bar which is mutually matched with the movable groove is integrally fixed on the surface of the rod body II.

Preferably, the mounting seat is rotationally connected with a cylindrical cam which is fixed with the threaded rod in a three-axis manner, the lower surface of the cylindrical rack is rotationally connected with an L-shaped rod, the free end of the first gear is matched with a groove on the surface of the cylindrical cam, the surface of the L-shaped rod is sleeved with a limiting plate, and two ends of the limiting plate are longitudinally limited and slidingly connected on the inner wall of the mounting seat.

Compared with the prior art, the invention has the following beneficial effects:

1. through setting up adjusting part to the drive expands the vaulting pole and removes along the horizontal direction, makes four positions that expand the vaulting pole can be adjusted according to different patient's eye distance, thereby has improved the holistic fitness of device effectively.

2. Through setting up and expanding the support subassembly to four expansion poles of simultaneous drive, let two front and back adjacent expansion poles to move in opposite directions, with patient's upper eyelid and lower eyelid expansion, need not to adjust every expansion pole alone, improved device holistic work efficiency effectively, and the convenience.

3. By providing a lifting assembly to drive the spreader bar downward to directly over the patient's eyes, the upper and lower eyelids of the patient can be hooked on the spreader bar.

Drawings

FIG. 1 is a schematic overall perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the mounting base of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the structure of the present invention showing the position of the annular shaft;

FIG. 4 is an enlarged schematic view of the structure of FIG. 2A according to the present invention;

FIG. 5 is an enlarged schematic view of the structure of FIG. 2B according to the present invention;

FIG. 6 is a schematic view of the structure of the spreader assembly of the present invention;

FIG. 7 is a schematic view of a bevel lever according to the present invention;

FIG. 8 is a schematic cross-sectional view of a first rod and a second rod according to the present invention;

FIG. 9 is an enlarged schematic view of the structure of FIG. 8C in accordance with the present invention;

fig. 10 is a schematic diagram of a cross-sectional structure of the mounting base of fig. 1 according to the present invention.

In the figure: 1. a base; 2. positioning a pillow; 3. a telescopic rod; 31. a first rod body; 32. a second rod body; 4. a mounting base; 5. expanding a supporting rod; 6. an adjustment assembly; 61. a rotating shaft; 62. a first threaded rod; 63. a bearing seat; 64. a limit rod; 65. a spline shaft; 66. a cylindrical rack; 67. a ring shaft; 68. a first gear; 69. a ratchet wheel; 610. a movable rod; 611. a ratchet; 612. a spring; 7. a spread assembly; 71. a second gear; 72. a U-shaped plate; 73. a third gear; 74. a second threaded rod; 75. rectangular internal thread sleeve; 76. a vertical rod; 77. bending the rod; 78. rectangular blocks; 79. a rectangular plate; 710. a bevel lever; 711. an inclined surface groove; 712. a bar-shaped groove; 8. a lifting assembly; 81. a third threaded rod; 82. a circular internal thread sleeve; 83. a slide bar; 84. a movable groove; 85. a cylindrical cam; 86. an L-shaped rod; 87. and a limiting plate.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Embodiment one:

referring to fig. 1-4, the present invention provides a technical solution: the utility model provides an ophthalmic surgery expands and props ware, includes base 1 to and fix the location pillow 2 on base 1, base 1 upper surface vertical fixation has four two liang of symmetric distribution's telescopic link 3, and the top of two adjacent telescopic links 3 is fixed with mount pad 4 jointly around, two be provided with between the mount pad 4 and be located base 1 top and two liang of symmetric distribution's four expansion stay bars 5, base 1 top is provided with the adjusting part 6 that is used for driving expansion stay bar 5.

Through setting up adjusting part 6 to the drive expands vaulting pole 5 and removes along the horizontal direction, makes four expand the position of vaulting pole 5 and can adjust according to different patient's eye distance, has improved the holistic fitness of device effectively then.

The adjusting component 6 comprises a rotating shaft 61 which is rotationally connected between two mounting seats 4, two symmetrically distributed first threaded rods 62 are sleeved on the rotating shaft 61, bearing seats 63 which are in threaded connection with the first threaded rods 62 are sleeved on the surfaces of the first threaded rods 62, limiting rods 64 which penetrate through the two bearing seats 63 and are parallel to the rotating shaft 61 are fixedly connected between the mounting seats 4, each two expansion supporting rods 5 corresponds to one bearing seat 63, and the directions of threads on the surfaces of the first threaded rods 62 are opposite.

One of them the upper surface grafting of mount pad 4 has the integral key shaft 65, the one end that the integral key shaft 65 is located the mount pad 4 is fixed with cylindricality rack 66, the mount pad 4 swivelling joint has annular axle 67, annular axle 67 one end fixedly connected with integrated into one piece's gear one 68 and ratchet 69, gear one 68 and cylindricality rack 66 intermesh.

The surface of the rotating shaft 61 is connected with two movable rods 610 in a telescopic manner, the upper ends of the two rotating shafts 61 are fixedly connected with ratchets 611 together, and springs 612 sleeved on the surfaces of the movable rods 610 are fixedly connected between the ratchets 611 and the rotating shafts 61.

The base 1 is arranged on an external bed body, and the head of a patient is positioned in the positioning pillow 2 after lying down;

the hand-held spline shaft 65 drives the cylindrical rack 66 to move up and down, the cylindrical rack 66 can drive the first gear 68 meshed with the cylindrical rack 66 and the ratchet 69 integrally formed with the first gear 68 to rotate reciprocally, the ratchet 69 can drive the movable rod 610 and the rotating shaft 61 to rotate anticlockwise through the ratchet 611 meshed with the ratchet 69, the first gear 68 and the ratchet 69 can not drive the rotating shaft 61 to rotate when rotating clockwise, and the rotating shaft 61 can drive the first two threaded rods 62 sleeved on the surface of the rotating shaft to rotate along with the rotating shaft;

in the initial state, two bearing seats 63 are located the extreme position that keeps away from each other, because the screw thread direction on two threaded rod one 62 surfaces is opposite, then two threaded rod one 62 can drive two bearing seats 63 respectively and move towards relative direction when rotatory, bear seat 63 can drive two expansion brace 5 that correspond with it and remove along with it for four two liang of symmetrical distribution expand brace 5 be located respectively directly over two eyes of patient, thereby make expansion brace 5's position can be adjusted according to different patient's eye distance, easy operation is convenient, and has improved the holistic suitability of device effectively.

Embodiment two:

referring to fig. 5-7, for further explanation of the embodiment, a spreader assembly 7 for spreading the upper eyelid and the lower eyelid of the patient is disposed above the base 1 and drives the two front and rear adjacent spreaders 5 to move in opposite directions.

Through setting up expansion assembly 7 to four expansion poles 5 of simultaneous drive, make two front and back adjacent expansion poles 5 move in opposite directions, with patient's upper eyelid and lower eyelid expansion, need not to adjust every expansion pole 5 alone, improved device holistic work efficiency effectively, and the convenience.

The expanding and supporting assembly 7 comprises a second gear 71 sleeved on the surface of the spline shaft 65, two symmetrically-distributed U-shaped plates 72 are fixedly connected to the upper surface of the mounting seat 4, the edge of the second gear 71 is movably connected in the U-shaped plates 72, a third gear 73 meshed with the second gear 71 is rotatably connected to the upper surface of the mounting seat 4, a second threaded rod 74 coaxially fixed with the third gear 73 and located above the third gear 73 is sleeved on the surface of the second threaded rod 74, a rectangular inner threaded sleeve 75 in threaded connection with the second threaded rod is sleeved on the surface of the second threaded rod, a vertical rod 76 penetrating through the rectangular inner threaded sleeve 75 is vertically fixed to the upper surface of the mounting seat 4, and a bending rod 77 is fixedly connected to the surface of the rectangular inner threaded sleeve 75.

The provision of the U-shaped plate 72 can prevent the second gear 71 from moving up and down following the spline shaft 65;

the manual rotation spline shaft 65 can drive the second gear 71 sleeved on the surface of the spline shaft to rotate therewith, the second gear 71 can drive the third gear 73 meshed with the second gear to rotate therewith, the third gear 73 can drive the second threaded rod 74 coaxially fixed with the third gear to rotate, the second threaded rod 74 can drive the rectangular internal thread sleeve 75 to move upwards, and the rectangular internal thread sleeve 75 can drive the bending rod 77 fixed on the surface of the rectangular internal thread sleeve to move upwards therewith.

Two rectangular blocks 78 which are symmetrically distributed are slidably connected to the surface of the bearing seat 63, two rectangular plates 79 are sleeved on the bending rods 77, two gears two 71 are fixedly connected to the lower surface of each rectangular plate 79, inclined grooves 711 which are mutually matched with the inclined rods 710 are formed in the rectangular blocks 78, strip-shaped grooves 712 for the inclined rods 710 to pass through are formed in the surface of the bearing seat 63, and four expansion supporting rods 5 are fixedly mounted on the side walls of the four rectangular blocks 78 respectively.

The upper eyelid and the lower eyelid of the two eyes of the patient are respectively hooked on the four expansion rods 5;

when the bending rod 77 moves upwards, the two rectangular plates 79 for color registration on the surface of the bending rod can be driven to move upwards, the rectangular plates 79 can drive the two inclined plane rods 710 fixed on the lower surface of the bending rod to move upwards, the two front and rear adjacent inclined plane rods 710 can push the two rectangular blocks 78 to move in opposite directions, and the rectangular blocks 78 can drive the expansion rod 5 fixed on the surface of the expansion rod to move along with the rectangular blocks, so that the front and rear adjacent expansion rod 5 moves in opposite directions to expand the upper eyelid and the lower eyelid of a patient.

The inclination angles of the two front and rear adjacent inclined plane rods 710 are different;

because the upper eyelid and the lower eyelid of the patient need to be opened to different degrees, the inclined plane rods 710 with different inclined angles are arranged, so that the moving distances of the two rectangular blocks 78 which are adjacent in front and back are controlled to be different, and the moving distances of the two expanding rods 5 which are adjacent in front and back are also different, so that the upper eyelid and the lower eyelid of the patient can be opened to different degrees.

Embodiment III:

referring to fig. 8-10, in this embodiment, for the second example, the telescopic rod 3 includes a first rod 31 vertically fixed on the upper surface of the base 1, and a second rod 32 telescopically inserted into the top end of the first rod 31.

A lifting assembly 8 for driving the expansion rod 5 to move to the position right above the eyes of the patient along the vertical direction is arranged in the mounting seat 4.

By providing the lifting assembly 8 so as to drive the spreader lever 5 downwardly to just above the patient's eyes, the upper and lower eyelids of the patient can be hooked on the spreader lever 5.

The lifting assembly 8 comprises a third threaded rod 81 rotatably connected in one rod body 31, a circular inner threaded sleeve 82 is inserted into one end of the second rod body 32 positioned in the first rod body 31, the third threaded rod 81 penetrates through the circular inner threaded sleeve 82 and is in threaded connection with the circular inner threaded sleeve 82, a movable groove 84 is formed in the inner wall of the first rod body 31, and a sliding bar 83 mutually matched with the movable groove 84 is integrally fixed on the surface of the second rod body 32.

The mounting seat 4 is rotationally connected with a cylindrical cam 85 which is coaxially fixed with a threaded rod III 81, the lower surface of the cylindrical rack 66 is rotationally connected with an L-shaped rod 86, the free end of the first gear 68 is matched with a groove on the surface of the cylindrical cam 85, a limiting plate 87 is sleeved on the surface of the L-shaped rod 86, and two ends of the limiting plate 87 are longitudinally limited and slidingly connected to the inner wall of the mounting seat 4.

The spline shaft 65 is pushed downwards, the L-shaped rod 86 can be driven to move downwards through the cylindrical rack 66, when the cylindrical rack 66 is separated from the first gear 68, the free end of the L-shaped rod 86 gradually enters a groove of the cylindrical cam 85 to push the cylindrical cam 85 to rotate, the cylindrical cam 85 can drive a third threaded rod 81 coaxially fixed with the cylindrical cam to rotate, the third threaded rod 81 can drive the circular internal thread sleeve 82 and the second rod 32 to move downwards, and the second rod 32 can drive the mounting seat 4 to move downwards, so that the expansion rod 5 also moves downwards to the position right above eyes of a patient.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides an ophthalmic surgery expands and props ware, includes base (1) to and fix location pillow (2) on base (1), its characterized in that: four telescopic rods (3) which are symmetrically distributed in pairs are vertically fixed on the upper surface of the base (1), mounting bases (4) are jointly fixed on the top ends of two telescopic rods (3) which are adjacent in front and back, four expansion rods (5) which are located above the base (1) and symmetrically distributed in pairs are arranged between the mounting bases (4), an adjusting component (6) used for driving the expansion rods (5) is arranged above the base (1), and two expansion rods (5) which are adjacent in front and back are arranged above the base (1) and move in opposite directions, so that the upper eyelid and the lower eyelid of a patient can be expanded, and the expansion components (7) are used for expanding the upper eyelid and the lower eyelid of the patient.

2. An ophthalmic surgical dilator according to claim 1, wherein: the adjusting component (6) comprises a rotating shaft (61) which is rotationally connected between two mounting seats (4), two symmetrically distributed threaded rods (62) are sleeved on the rotating shaft (61), bearing seats (63) which are in threaded connection with the threaded rods are sleeved on the surfaces of the threaded rods (62), limiting rods (64) which penetrate through the two bearing seats (63) and are parallel to the rotating shaft (61) are fixedly connected between the mounting seats (4), one bearing seat (63) is corresponding to each two expanding supporting rods (5), and the directions of the threads on the surfaces of the threaded rods (62) are opposite.

3. An ophthalmic surgical dilator according to claim 2, wherein: one of them the upper surface grafting of mount pad (4) has integral key shaft (65), the one end that integral key shaft (65) are located mount pad (4) is fixed with cylindricality rack (66), the rotation of mount pad (4) is connected with annular axle (67), annular axle (67) one end fixedly connected with inside and outside nested integrated into one piece's gear (68) and ratchet (69), gear (68) and cylindricality rack (66) intermeshing.

4. A spreader for ophthalmic surgery according to claim 3, wherein: the surface of the rotating shaft (61) is connected with two movable rods (610) in a telescopic inserting mode, the upper ends of the two rotating shafts (61) are fixedly connected with the same ratchet (611) together, and springs (612) sleeved on the surfaces of the movable rods (610) are fixedly connected between the ratchet (611) and the rotating shaft (61).

5. An ophthalmic surgical dilator according to claim 4, wherein: the expanding and supporting assembly (7) comprises a second gear (71) sleeved on the surface of the spline shaft (65), two symmetrically distributed U-shaped plates (72) are fixedly connected to the upper surface of the mounting seat (4), and the edge of the second gear (71) is movably connected in the U-shaped plates (72).

6. An ophthalmic surgical dilator according to claim 5, wherein: the mounting seat (4) upper surface rotation is connected with gear three (73) with gear two (71) intermeshing to and be located gear three (73) top and gear three (73) coaxial fixed threaded rod two (74), threaded rod two (74) surface cover be equipped with rather than threaded connection's rectangle internal thread cover (75), the vertical fixation of mounting seat (4) upper surface has pole setting (76) that pass rectangle internal thread cover (75), rectangle internal thread cover (75) surface fixedly connected with bent rod (77).

7. An ophthalmic surgical dilator according to claim 6, wherein: two rectangular blocks (78) which are symmetrically distributed are slidably connected to the surfaces of the two bearing seats (63), two rectangular plates (79) are sleeved on the bending rods (77), two gears (71) are fixedly connected to the lower surfaces of the rectangular plates (79), inclined grooves (711) which are mutually matched with the inclined rods (710) are formed in the rectangular blocks (78), strip-shaped grooves (712) through which the inclined rods (710) penetrate are formed in the surfaces of the bearing seats (63), four expansion supporting rods (5) are fixedly installed on the side walls of the four rectangular blocks (78) respectively, and the inclined angles of the inclined rods (710) are different from front to back.

8. A spreader for ophthalmic surgery according to claim 3, wherein: the telescopic rod (3) comprises a first rod body (31) vertically fixed on the upper surface of the base (1) and a second rod body (32) which is telescopically inserted into the top end of the first rod body (31), and a lifting assembly (8) for driving the telescopic rod (5) to move to the position right above eyes of a patient along the vertical direction is arranged in the mounting seat (4).

9. An ophthalmic surgical dilator according to claim 8, wherein: lifting assembly (8) are including rotating threaded rod three (81) of connecting in one of them body of rod one (31), body of rod two (32) are located one end grafting in body of rod one (31) and have circular internal thread cover (82), threaded rod three (81) pass circular internal thread cover (82) and rather than threaded connection, movable groove (84) have been seted up to body of rod one (31) inner wall, body of rod two (32) surface integration is fixed with slide (83) with movable groove (84) looks adaptation each other.

10. An ophthalmic surgical dilator according to claim 9, wherein: the mounting seat (4) is rotationally connected with a cylindrical cam (85) which is coaxially fixed with a threaded rod III (81), the lower surface of the cylindrical rack (66) is rotationally connected with an L-shaped rod (86), the free end of the gear I (68) is matched with a groove on the surface of the cylindrical cam (85), the surface of the L-shaped rod (86) is sleeved with a limiting plate (87), and two ends of the limiting plate (87) are longitudinally and slidably connected onto the inner wall of the mounting seat (4).