阅读说明：本技术 一种多功能泪点扩张仪 (Multifunctional lacrimal point dilator ) 是由 王延延 周婷 薛娟 于 2021-09-17 设计创作，主要内容包括：本发明公开了一种多功能泪点扩张仪,涉及医疗器械技术领域,包括操作组件、后脑固定组件、前额固定组件、下颌固定组件、扩张组件等。操作组件具备四个自由度,可灵活实现扩张组件的位姿调控,以适应特定工位的应用需求；扩张组件带有三个扩张头,可实现对泪点的扩张,且可与操作组件一起在工作位置悬停,便于单个医生进行手术操作；后脑固定组件、前额固定组件、下颌固定组件实现对病人头部的固定和位姿调姿,可灵活适配不同病人的特定情况。(The invention discloses a multifunctional punctum dilator, which relates to the technical field of medical instruments and comprises an operation component, a hindbrain fixing component, a forehead fixing component, a lower jaw fixing component, a dilator component and the like. The operation assembly has four degrees of freedom, and can flexibly realize the pose regulation and control of the expansion assembly so as to adapt to the application requirement of a specific station; the expansion assembly is provided with three expansion heads, so that the lacrimal punctum can be expanded, and the expansion assembly and the operation assembly can hover at a working position, so that a single doctor can conveniently perform operation; the hindbrain fixing component, the forehead fixing component and the lower jaw fixing component realize the fixation and pose adjustment of the head of the patient, and can be flexibly adapted to the specific conditions of different patients.)

1. The utility model provides a multi-functional punctum expansion appearance, includes operation subassembly, the fixed subassembly of back brain, the fixed subassembly of forehead, the fixed subassembly of lower jaw, expansion subassembly, first electric putter, first connecting rod, upper bracket plate, second connecting rod, preceding layer board, its characterized in that: the operating assembly comprises a first bottom plate, a first support, a second support and a four-degree-of-freedom mechanical arm; the two first supports are fixedly arranged on two sides of the first bottom plate; the second support and the four-degree-of-freedom mechanical arm are fixedly arranged on the first bottom plate;

the afterbrain fixing component comprises a third bottom plate, a first rotating shaft, a third support, an incomplete internal gear, an incomplete external gear and a sliding rail; two first rotating shafts are fixedly arranged on two sides of the third bottom plate; the third support is fixedly arranged on the third bottom plate; the sliding rail is fixedly arranged on the third bottom plate; the incomplete inner gear and the incomplete outer gear are respectively and rotatably arranged on the slide rail;

the forehead fixing assembly comprises a first support, a friction ring, a first sliding rod, a fourth support, a first sliding frame, a first guide rod and a first sliding block; the friction ring and the fourth support are respectively and fixedly arranged on the first support; the first sliding rod is slidably arranged on the fourth support; the first sliding frame is fixedly arranged on the first sliding rod; the first guide rod is fixedly arranged in the first sliding frame; the first sliding block is sleeved on the first guide rod and is in sliding connection with the first sliding frame;

the lower jaw fixing component comprises a second rotating shaft, a threaded column, a second sliding rod, a second sliding frame, a second sliding block and a third guide rod; the threaded column is fixedly arranged on the second rotating shaft; the second sliding rod is slidably arranged in the threaded column; the second sliding frame is fixedly arranged on the second sliding rod; the third guide rod is fixedly arranged on the second sliding frame; the second sliding block is sleeved on the third guide rod and is in sliding connection with the second sliding frame;

the expansion assembly comprises a sixth support;

the hindbrain fixing component is rotatably arranged on two first supports of the operation component through two first rotating shafts; the first end of the first electric push rod is hinged to the second support, and the second end of the first electric push rod is hinged to the third support; the incomplete inner gear and the incomplete outer gear are fixedly provided with a forehead fixing component through a first strut respectively; two ends of the first connecting rod are respectively and rotatably arranged on the first sliding blocks of the two forehead fixing components; the upper supporting plate is fixedly arranged on the first connecting rod; each first support column is rotatably provided with a lower jaw fixing component through a second rotating shaft; two ends of the second connecting rod are respectively and rotatably arranged on the second sliding blocks of the two lower jaw fixing assemblies; the front supporting plate is fixedly arranged on the second connecting rod; the expansion assembly is fixedly arranged at the tail end of the four-degree-of-freedom mechanical arm through a sixth support.

2. The multi-functional punctal dilatometer of claim 1, characterized in that: the four-degree-of-freedom mechanical arm comprises a second electric push rod, a second bottom plate, a first motor, a third connecting rod, a second motor, a fourth connecting rod and a third motor; the two second electric push rods are fixedly arranged on the first bottom plate; the second bottom plate is fixedly connected with the push rod ends of the two second electric push rods; the first motor is fixedly arranged on the second bottom plate; the first end of the third connecting rod is rotatably arranged on the second bottom plate; the first end of the third connecting rod is fixedly connected with the output shaft of the first motor; the second motor is fixedly arranged at the second end of the third connecting rod; the first end of the fourth connecting rod is rotatably arranged at the second end of the third connecting rod; the first end of the fourth connecting rod is fixedly connected with an output shaft of the second motor; the third motor is fixedly arranged at the second end of the fourth connecting rod.

3. The multi-functional punctal dilatometer as set forth in claim 2, characterized in that: the hindbrain fixing component also comprises a fourth motor, a rear supporting plate, a driving gear and a lower supporting plate; the fourth motor is fixedly arranged on the third bottom plate; the driving gear is rotatably arranged on the third bottom plate; the driving gear is fixedly connected with an output shaft of the fourth motor; the driving gear is respectively meshed with inner gear teeth arranged on the incomplete internal gear and outer gear teeth arranged on the incomplete external gear; the rear supporting plate is fixedly arranged on the third support; the lower supporting plate is rotatably arranged on the third bottom plate.

4. A multi-functional punctal dilatometer as set forth in claim 3, characterized in that: the first bottom plate also comprises a containing hole which is used for containing the fourth motor.

5. The multi-functional punctal dilatometer as set forth in claim 4, characterized in that: the forehead fixing assembly further comprises a second support, a third support, a fifth connecting rod, a roller, a first bolt, a first spring and a second spring; the second support column is fixedly arranged on the first support column; the fifth connecting rod is rotatably arranged on the first support; the third support is fixedly arranged at the first end of the fifth connecting rod; a roller is rotatably arranged at the second end of the fifth connecting rod; the first bolt is slidably arranged in the first support; the roller is in contact fit with the first end of the first bolt; the first sliding rod is provided with a plurality of saw teeth, and the second end of the first bolt is in contact fit with the saw teeth on the first sliding rod; two ends of the first spring are respectively and fixedly arranged on the first support and the first plug pin; and two ends of the second spring are respectively and fixedly arranged on the fourth support and the first sliding frame.

6. The multi-functional punctal dilatometer of claim 5, wherein: the second sliding rod is provided with a plurality of pin holes.

7. The multi-functional punctal dilatometer as set forth in claim 6, characterized in that: the lower jaw fixing component also comprises a second bolt, a third spring, a fourth pillar, a threaded sleeve, a fifth pillar, a sixth connecting rod, a fifth support, a sixth pillar, a fourth spring and a second guide rod; the second bolt is slidably arranged in the threaded column; the second bolt is matched with the pin hole; two ends of the third spring are respectively fixedly connected with the second bolt and the threaded column; the threaded sleeve is sleeved on the threaded column; the internal thread on the thread sleeve is matched with the external thread on the thread column; two fourth struts are fixedly arranged on two sides of the threaded sleeve; the two fifth supports are respectively and fixedly arranged on two sides of the second rotating shaft; each fifth support is rotatably provided with a sixth connecting rod; a fifth support and a sixth support are fixedly mounted at two ends of the sixth connecting rod respectively; the second guide rod is slidably arranged on the second rotating shaft; one end of the second guide rod is fixedly connected with the second sliding frame; and two ends of the fourth spring are respectively fixedly connected with the second rotating shaft and the second sliding frame.

8. The multi-functional punctal dilators of claim 7, characterized in that: the side surface of the thread bushing is provided with a conical surface; the fifth support is in contact fit with the conical surface on the threaded sleeve; the conical angle of the conical surface on the threaded sleeve is smaller than the friction angle of the contact surface of the threaded sleeve and the fifth support; the sixth strut is adapted for contact engagement with the friction ring.

9. The multi-functional punctal dilatometer as set forth in claim 8, characterized in that: the expansion assembly further comprises a third electric push rod, a seventh support, an eighth support, a camera, a picture frame, a lens, a fourth electric push rod, a ninth support, a rolling ball, a third bolt, a fifth spring and an expansion head; the sixth support is rotatably arranged at the second end of the fourth connecting rod; the sixth support is fixedly connected with an output shaft of the third motor; the third electric push rod is fixedly arranged on the sixth support; the seventh support is fixedly arranged at the push rod end of the third electric push rod; the eighth support is fixedly arranged on the seventh support; the camera is fixedly arranged on the eighth support; the mirror frame is fixedly arranged on the seventh support; the lens is arranged in the frame in a sliding way; the side surface of the mirror frame is fixedly provided with three fourth electric push rods which are uniformly distributed on the circumference; the bottom of the mirror frame is fixedly provided with three ninth supports which are uniformly distributed on the circumference; a rolling ball is fixedly arranged at the push rod end of each fourth electric push rod; each ninth support is provided with a third bolt in a sliding way; the first end of the third bolt is provided with an inclined plane; the inclined plane of the first end of the third bolt is in contact fit with the rolling ball; two ends of the fifth spring are respectively fixedly connected with the third bolt and the ninth support; an expansion head is fixedly arranged on the second end of each third bolt.

10. The multi-functional punctal dilatometer as recited in claim 9, wherein: the lens is a multifocal convex lens.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a multifunctional punctum dilator.

Background

"Yingfeng tear" is a common disease in clinic, which not only brings trouble to patients, but also develops chronic irritant conjunctivitis, eczematous dermatitis of lower eyelid and cheek, and other diseases, the main disease root is punctal abnormality, in the actual treatment, punctal forming operation is adopted, the curative effect is definite, the operation is simple, the postoperative complication is few, the treatment can be repeated, and the method is one of effective methods for treating punctal abnormality. The main applicable scenarios for punctal angioplasty are: punctal occlusion or membrane closure, punctal stenosis (those who have failed dilated therapy), blockage of the head of the lacrimal canaliculus, lesions involving the punctum or head of the lacrimal canaliculus (e.g., pigmented nevi, which do not cause blockage, but need surgical resection).

The primary method of punctal angioplasty is the bite-cut (usually performed microscopically), with punctal dilators to dilate the punctum. If the lacrimal punctum is blocked, under the operation microscope or magnifier, the patient can find the position and pass through the position with strong force, and then normal saline is injected to confirm that the lacrimal passage is unobstructed, and then the operation is continued. In contrast, patent No. 201611207327.1 discloses a punctum dilator, which comprises a first dilating forceps body and a second dilating forceps body, wherein the front ends of the two dilating forceps bodies are respectively provided with dilating jaws, and a dilating bolt assembly is arranged in a containing part between the two dilating jaws; the expansion bolt assembly comprises a fixed cavity, the upper part of which is provided with a push bolt rod, and the lower end of the cavity of the fixed cavity is provided with a cavity; the push bolt rod comprises a rod cap, the lower side of which is provided with a push rod, and the push rod extends into the rod penetrating hole of the fixed cavity; the punctum expansion plug comprises a plug body, the upper end of the plug body is provided with a flange, the lower end of the plug body is provided with a conical plug head, and the upper part of a central through hole of the plug body is provided with a fixing groove; a punctal dilation plug is disposed in a cavity in the lower portion of the fixation lumen. The lacrimal dilator has the advantages of reasonable design, compact structure, rapid dilation, simple operation, sustainable dilation, avoidance of repeated operation and reduction of pain of patients. However, the patent is a hand-held manual operation device, which is easy to affect accuracy due to shaking of the hand of the operator in actual operation, and further may cause damage to the patient, and secondly, the reliability of taking out the expansion plug after the expansion plug is put in is not strong, and if the expansion plug is not put in, the expansion clamp is simply used, and in the operation, the fixation of the expansion clamp becomes a problem to be solved urgently.

Disclosure of Invention

Aiming at the technical problems, the technical scheme adopted by the invention is as follows: a multifunctional punctum dilator comprises an operation component, a hindbrain fixing component, a forehead fixing component, a lower jaw fixing component, a dilating component, a first electric push rod, a first connecting rod, an upper supporting plate, a second connecting rod and a front supporting plate; the operating assembly comprises a first bottom plate, a first support, a second support and a four-degree-of-freedom mechanical arm; the two first supports are fixedly arranged on two sides of the first bottom plate; the second support and the four-degree-of-freedom mechanical arm are fixedly arranged on the first bottom plate; the afterbrain fixing component comprises a third bottom plate, a first rotating shaft, a third support, an incomplete internal gear, an incomplete external gear and a sliding rail; two first rotating shafts are fixedly arranged on two sides of the third bottom plate; the third support is fixedly arranged on the third bottom plate; the sliding rail is fixedly arranged on the third bottom plate; the incomplete inner gear and the incomplete outer gear are respectively and rotatably arranged on the slide rail; the forehead fixing assembly comprises a first support, a friction ring, a first sliding rod, a fourth support, a first sliding frame, a first guide rod and a first sliding block; the friction ring and the fourth support are respectively and fixedly arranged on the first support; the first sliding rod is slidably arranged on the fourth support; the first sliding frame is fixedly arranged on the first sliding rod; the first guide rod is fixedly arranged in the first sliding frame; the first sliding block is sleeved on the first guide rod and is in sliding connection with the first sliding frame; the lower jaw fixing component comprises a second rotating shaft, a threaded column, a second sliding rod, a second sliding frame, a second sliding block and a third guide rod; the threaded column is fixedly arranged on the second rotating shaft; the second sliding rod is slidably arranged in the threaded column; the second sliding frame is fixedly arranged on the second sliding rod; the third guide rod is fixedly arranged on the second sliding frame; the second sliding block is sleeved on the third guide rod and is in sliding connection with the second sliding frame; the expansion assembly comprises a sixth support; the hindbrain fixing component is rotatably arranged on two first supports of the operation component through two first rotating shafts; the first end of the first electric push rod is hinged to the second support, and the second end of the first electric push rod is hinged to the third support; the incomplete inner gear and the incomplete outer gear are fixedly provided with a forehead fixing component through a first strut respectively; two ends of the first connecting rod are respectively and rotatably arranged on the first sliding blocks of the two forehead fixing components; the upper supporting plate is fixedly arranged on the first connecting rod; each first support column is rotatably provided with a lower jaw fixing component through a second rotating shaft; two ends of the second connecting rod are respectively and rotatably arranged on the second sliding blocks of the two lower jaw fixing assemblies; the front supporting plate is fixedly arranged on the second connecting rod; the expansion assembly is fixedly arranged at the tail end of the four-degree-of-freedom mechanical arm through a sixth support.

Further, the four-degree-of-freedom mechanical arm comprises a second electric push rod, a second bottom plate, a first motor, a third connecting rod, a second motor, a fourth connecting rod and a third motor; the two second electric push rods are fixedly arranged on the first bottom plate; the second bottom plate is fixedly connected with the push rod ends of the two second electric push rods; the first motor is fixedly arranged on the second bottom plate; the first end of the third connecting rod is rotatably arranged on the second bottom plate; the first end of the third connecting rod is fixedly connected with the output shaft of the first motor; the second motor is fixedly arranged at the second end of the third connecting rod; the first end of the fourth connecting rod is rotatably arranged at the second end of the third connecting rod; the first end of the fourth connecting rod is fixedly connected with an output shaft of the second motor; the third motor is fixedly arranged at the second end of the fourth connecting rod.

Furthermore, the hindbrain fixing component also comprises a fourth motor, a rear supporting plate, a driving gear and a lower supporting plate; the fourth motor is fixedly arranged on the third bottom plate; the driving gear is rotatably arranged on the third bottom plate; the driving gear is fixedly connected with an output shaft of the fourth motor; the driving gear is respectively meshed with inner gear teeth arranged on the incomplete internal gear and outer gear teeth arranged on the incomplete external gear; the rear supporting plate is fixedly arranged on the third support; the lower supporting plate is rotatably arranged on the third bottom plate.

Furthermore, the first bottom plate further comprises a containing hole, and the containing hole is used for containing the fourth motor.

Furthermore, the forehead fixing assembly further comprises a second support, a third support, a fifth connecting rod, a roller, a first bolt, a first spring and a second spring; the second support column is fixedly arranged on the first support column; the fifth connecting rod is rotatably arranged on the first support; the third support is fixedly arranged at the first end of the fifth connecting rod; a roller is rotatably arranged at the second end of the fifth connecting rod; the first bolt is slidably arranged in the first support; the roller is in contact fit with the first end of the first bolt; the first sliding rod is provided with a plurality of saw teeth, and the second end of the first bolt is in contact fit with the saw teeth on the first sliding rod; two ends of the first spring are respectively and fixedly arranged on the first support and the first plug pin; and two ends of the second spring are respectively and fixedly arranged on the fourth support and the first sliding frame.

Furthermore, a plurality of pin holes are formed in the second sliding rod.

Furthermore, the lower jaw fixing component also comprises a second bolt, a third spring, a fourth pillar, a threaded sleeve, a fifth pillar, a sixth connecting rod, a fifth support, a sixth pillar, a fourth spring and a second guide rod; the second bolt is slidably arranged in the threaded column; the second bolt is matched with the pin hole; two ends of the third spring are respectively fixedly connected with the second bolt and the threaded column; the threaded sleeve is sleeved on the threaded column; the internal thread on the thread sleeve is matched with the external thread on the thread column; two fourth struts are fixedly arranged on two sides of the threaded sleeve; the two fifth supports are respectively and fixedly arranged on two sides of the second rotating shaft; each fifth support is rotatably provided with a sixth connecting rod; a fifth support and a sixth support are fixedly mounted at two ends of the sixth connecting rod respectively; the second guide rod is slidably arranged on the second rotating shaft; one end of the second guide rod is fixedly connected with the second sliding frame; and two ends of the fourth spring are respectively fixedly connected with the second rotating shaft and the second sliding frame.

Furthermore, a conical surface is arranged on the side surface of the threaded sleeve; the fifth support is in contact fit with the conical surface on the threaded sleeve; the conical angle of the conical surface on the threaded sleeve is smaller than the friction angle of the contact surface of the threaded sleeve and the fifth support; the sixth strut is adapted for contact engagement with the friction ring.

Furthermore, the expansion assembly also comprises a third electric push rod, a seventh support, an eighth support, a camera, a picture frame, a lens, a fourth electric push rod, a ninth support, a rolling ball, a third bolt, a fifth spring and an expansion head; the sixth support is rotatably arranged at the second end of the fourth connecting rod; the sixth support is fixedly connected with an output shaft of the third motor; the third electric push rod is fixedly arranged on the sixth support; the seventh support is fixedly arranged at the push rod end of the third electric push rod; the eighth support is fixedly arranged on the seventh support; the camera is fixedly arranged on the eighth support; the mirror frame is fixedly arranged on the seventh support; the lens is arranged in the frame in a sliding way; the side surface of the mirror frame is fixedly provided with three fourth electric push rods which are uniformly distributed on the circumference; the bottom of the mirror frame is fixedly provided with three ninth supports which are uniformly distributed on the circumference; a rolling ball is fixedly arranged at the push rod end of each fourth electric push rod; each ninth support is provided with a third bolt in a sliding way; the first end of the third bolt is provided with an inclined plane; the inclined plane of the first end of the third bolt is in contact fit with the rolling ball; two ends of the fifth spring are respectively fixedly connected with the third bolt and the ninth support; an expansion head is fixedly arranged on the second end of each third bolt.

Further, the lens is a multi-focal convex lens.

Compared with the prior art, the invention has the beneficial effects that: (1) the multifunctional punctum dilator can realize the function of fixing the head of a patient; (2) the multifunctional punctum dilator can realize the pose adjustment of the head of a patient; (3) after the multifunctional lacrimal punctum dilator expands the lacrimal punctum, the multifunctional lacrimal punctum dilator can hover for a long time, so that the injury to a patient caused by the possible vibration of the dilating head is avoided; (4) the multifunctional punctum dilatometer can realize the whole-process operation of a single doctor with a main knife without the assistance of additional doctors, thereby reducing the workload and the working strength.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention in the storage state.

Fig. 2 is a schematic view showing the overall structure of the present invention in an expanded state.

Fig. 3 is a schematic view showing the overall structure of the present invention in an expanded state.

Fig. 4 is a schematic view of the overall structure of the present invention in operation.

FIG. 5 is a schematic view of an operating assembly according to the present invention.

Fig. 6 is a schematic structural view of a hindbrain fixation assembly of the present invention.

FIG. 7 is a view showing a structure of a partial internal gear part of the present invention.

Fig. 8 is a view showing a structure of a part of a partial external gear according to the present invention.

Fig. 9 is a schematic structural view of a forehead fixing assembly according to the present invention.

Fig. 10 is a schematic view of the connection between two forehead attachment assemblies of the present invention.

Fig. 11 is a schematic view of the mandibular fixation assembly of the present invention.

Fig. 12 is a schematic view of the connection between two mandibular fixation assemblies of the invention.

Fig. 13 is a schematic view of the stent assembly of the present invention.

Fig. 14 is an enlarged partial schematic view of a stent assembly of the present invention.

In the figure: 1-operating the assembly; 2-hindbrain fixation assembly; 3-forehead fixation assembly; 4-a mandibular fixation assembly; 5-an expansion component; 6-a first electric push rod; 7-a first link; 8-mounting a supporting plate; 9-a second link; 10-a front fascia; 101-a first backplane; 102-a first support; 103-a second support; 104-a second electric push rod; 105-a second backplane; 106-a first motor; 107-third link; 108-a second motor; 109-a fourth link; 110-a third motor; 111-containment holes; 201-a third base plate; 202-a first shaft; 203-a fourth motor; 204-a third support; 205-rear pallet; 206-a drive gear; 207-partial internal gear; 20701-inner gear teeth; 208-incomplete external gear; 20801-external gear teeth; 209-lower supporting plate; 210-a slide rail; 301-a first strut; 302-a second pillar; 303-a third strut; 304-a fifth link; 305-a roller; 306-a first latch; 307-friction ring; 308-a first slide bar; 309-a first spring; 310-a fourth support; 311-a second spring; 312 — a first sliding frame; 313-a first guide bar; 314-a first slider; 401-a second spindle; 402-a threaded post; 403-a second bolt; 404-a third spring; 405-a fourth strut; 406-a threaded sleeve; 407-fifth strut; 408-a sixth link; 409-a fifth support; 410-a sixth strut; 411-fourth spring; 412-a second guide bar; 413-a second slide bar; 414-pin holes; 415-a second sliding frame; 416-a second slider; 417-a third guide bar; 501-a sixth support; 502-third electric putter; 503-a seventh support; 504-eighth support; 505-a camera; 506-the frame; 507-a lens; 508-a fourth electric putter; 509-ninth support; 510-a ball; 511-a third bolt; 512-fifth spring; 513-expansion head.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Fig. 1 to 14 show a preferred embodiment of the present invention.

As shown in fig. 5, in the operating assembly 1, two first supporting seats 102 are fixedly installed at both sides of a first base plate 101; the second support 103 is fixedly mounted on the first base plate 101; two second electric push rods 104 are fixedly arranged on the first bottom plate 101; the second bottom plate 105 is fixedly connected with the push rod ends of the two second electric push rods 104; the first motor 106 is fixedly mounted on the second base plate 105; a first end of the third link 107 is rotatably mounted on the second base plate 105; a first end of the third connecting rod 107 is fixedly connected with an output shaft of the first motor 106; the second motor 108 is fixedly arranged at the second end of the third connecting rod 107; a first end of the fourth link 109 is rotatably mounted at a second end of the third link 107; a first end of the fourth connecting rod 109 is fixedly connected with an output shaft of the second motor 108; the third motor 110 is fixedly installed at the second end of the fourth link 109.

As shown in fig. 6, 7 and 8, in the hindbrain fixation assembly 2, two first rotation shafts 202 are fixedly installed at both sides of a third base plate 201; the third support 204 is fixedly arranged on the third bottom plate 201; the slide rail 210 is fixedly installed on the third bottom plate 201; the incomplete inner gear 207 and the incomplete outer gear 208 are respectively and rotatably mounted on a slide rail 210; the fourth motor 203 is fixedly arranged on the third bottom plate 201; a driving gear 206 is rotatably mounted on the third base plate 201; the driving gear 206 is fixedly connected with an output shaft of the fourth motor 203; the drive gear 206 is engaged with inner ring teeth 20701 provided on the partial internal gear 207 and outer ring teeth 20801 provided on the partial external gear 208, respectively; the rear supporting plate 205 is fixedly arranged on the third support 204; the lower supporting plate 209 is rotatably arranged on the third bottom plate 201; the first base plate 101 further includes a receiving hole 111, and the receiving hole 111 is used for receiving the fourth motor 203.

As shown in fig. 9, in the forehead fixing assembly 3, the friction ring 307 and the fourth support 310 are respectively fixedly mounted on the first support 301; the first sliding bar 308 is slidably mounted on the fourth support 310; the first sliding frame 312 is fixedly mounted on the first sliding bar 308; the first guide rod 313 is fixedly arranged in the first sliding frame 312; the first sliding block 314 is sleeved on the first guide rod 313 and is connected with the first sliding frame 312 in a sliding manner; the second support column 302 is fixedly arranged on the first support column 301; the fifth connecting rod 304 is rotatably mounted on the first support 301; the third support 303 is fixedly arranged at the first end of the fifth connecting rod 304; a roller 305 is rotatably arranged at the second end of the fifth connecting rod 304; a first bolt 306 is slidably mounted in the first strut 301; the roller 305 is in contact engagement with a first end of a first pin 306; the first sliding rod 308 is provided with a plurality of saw teeth, and the second end of the first bolt 306 is in contact fit with the saw teeth on the first sliding rod 308; two ends of the first spring 309 are respectively and fixedly arranged on the first support 301 and the first bolt 306; two ends of the second spring 311 are respectively and fixedly mounted on the fourth support 310 and the first sliding frame 312.

As shown in fig. 11, in the mandibular fixation assembly 4, a threaded post 402 is fixedly mounted on the second shaft 401; a second sliding bar 413 is slidably mounted within the threaded post 402; the second slide frame 415 is fixedly installed on the second slide bar 413; the third guide bar 417 is fixedly mounted on the second slide frame 415; the second sliding block 416 is sleeved on the third guide rod 417 and is connected with the second sliding frame 415 in a sliding manner; a second bolt 403 is slidably mounted in the threaded post 402; the second pin 403 mates with the pin hole 414; two ends of the third spring 404 are respectively fixedly connected with the second bolt 403 and the threaded column 402; the threaded sleeve 406 is sleeved on the threaded post 402; the internal threads on the threaded sleeve 406 mate with the external threads on the threaded post 402; two fourth struts 405 are fixedly arranged at two sides of the threaded sleeve 406; the two fifth supports 409 are respectively and fixedly installed at two sides of the second rotating shaft 401; each fifth support 409 is rotatably provided with a sixth connecting rod 408; a fifth support 407 and a sixth support 410 are respectively fixedly mounted at two ends of the sixth connecting rod 408; the second guide rod 412 is slidably mounted on the second rotating shaft 401; one end of the second guide bar 412 is fixedly connected with the second sliding frame 415; two ends of the fourth spring 411 are respectively and fixedly connected with the second rotating shaft 401 and the second sliding frame 415; the second sliding rod 413 is provided with a plurality of pin holes 414; the side surface of the threaded sleeve 406 is provided with a conical surface; the fifth support 407 is in contact fit with a conical surface on the threaded sleeve 406; the taper angle of the taper surface on the threaded sleeve 406 is smaller than the friction angle of the contact surface of the threaded sleeve 406 and the fifth support 407; the sixth leg 410 is adapted to be in contact engagement with the friction ring 307.

As shown in fig. 13 and 14, in the expansion assembly 5, the third electric push rod 502 is fixedly mounted on the sixth support 501; the seventh support 503 is fixedly installed at the push rod end of the third electric push rod 502; the eighth support 504 is fixedly mounted on the seventh support 503; the camera 505 is fixedly mounted on the eighth support 504; the mirror frame 506 is fixedly mounted on the seventh mount 503; the lens 507 is slidably mounted in the frame 506; three fourth electric push rods 508 which are uniformly distributed circumferentially are fixedly arranged on the side surface of the mirror frame 506; the bottom of the mirror frame 506 is fixedly provided with three ninth supports 509 which are uniformly distributed on the circumference; a rolling ball 510 is fixedly arranged at the push rod end of each fourth electric push rod 508; a third bolt 511 is slidably mounted on each ninth support 509; a first end of the third latch 511 is provided with an inclined plane; the inclined surface of the first end of the third pin 511 is in contact fit with the ball 510; two ends of the fifth spring 512 are respectively fixedly connected with the third bolt 511 and the ninth support 509; an expansion head is fixedly mounted on a second end of each third latch 511.

As shown in fig. 1, 2, 3, 4, 10 and 12, the hindbrain fixation assembly 2 is rotatably mounted on two first supports 102 of the operation assembly 1 by two first rotation shafts 202; the first end of the first electric push rod 6 is hinged on the second support 103, and the second end of the first electric push rod 6 is hinged on the third support 204; a forehead fixing assembly 3 is fixedly mounted on the incomplete inner gear 207 and the incomplete outer gear 208 through a first strut 301 respectively; two ends of the first link rod 7 are respectively rotatably mounted on the first sliding blocks 314 of the two forehead fixing assemblies 3; the upper supporting plate 8 is fixedly arranged on the first connecting rod 7; each first strut 301 is rotatably mounted with a mandibular fixation assembly 4 via a second rotating shaft 401; two ends of the second connecting rod 9 are respectively and rotatably arranged on the second sliding blocks 416 of the two lower jaw fixing assemblies 4; the front supporting plate 10 is fixedly arranged on the second connecting rod 9; the expansion component 5 is connected with the hindbrain fixation component 2 through a sixth support 501; the sixth support 501 is rotatably mounted at the second end of the fourth link 109; the sixth mount 501 is fixedly connected to the output shaft of the third motor 110.

The working principle of the invention is as follows: the storage state of the whole structure of the invention is schematically shown in fig. 1, when in use, the device is placed on an operating table, the head of a patient is placed on the back supporting plate 205 and the lower supporting plate 209, then the fourth motor 203 drives the driving gear 206 to rotate, the driving gear 206 drives the incomplete internal gear 207 and the incomplete external gear 208 to rotate, and finally the forehead fixing component 3 and the mandible fixing component 4 are driven to the positions shown in fig. 2.

Further, the threaded sleeve 406 is rotated by screwing the fourth strut 405 by hand, so that the threaded sleeve 406 moves away from the fifth support 409, and the sixth strut 410 is disengaged from the friction ring 307, then, the mandibular fixation assembly 4 is manually rotated, about the second axis 401, to the position shown in figure 3, then, the threaded sleeve 406 is driven to rotate by screwing the fourth support 405 by hand, so that the threaded sleeve 406 moves towards the direction close to the fifth support 409, thereby, the sixth support 410 is tightly contacted with the friction ring 307, the contact pressure between the sixth support 410 and the friction ring 307 is increased by pre-tightening the threaded sleeve 406, thereby locking the relative position of the lower jaw fixing component 4 and the forehead fixing component 3 through friction force, because the conical angle of the conical surface on the threaded sleeve 406 is smaller than the friction angle of the contact surface between the threaded sleeve 406 and the fifth support 407, the mechanism is self-locked, and the pose is fixed and reliable.

Further, the first connecting rod 7 and the second connecting rod 9 are pressed by hand, so that the first sliding rod 308 moves along the fourth support 310, the second sliding rod 413 moves along the threaded column 402, and when the upper supporting plate 8 is in close contact with the forehead of the patient, the first latch 306 blocks the first sliding rod 308, so that the position of the upper supporting plate 8 is fixed; when the front fascia 10 is in close contact with the lower jaw of the patient, the second pin 403 is inserted into the pin hole 414 to block the second slide rod 413, so that the position of the front fascia 10 is fixed.

Further, the first electric push rod 6 drives the third bottom plate 201 to rotate around the axis of the first rotating shaft 202, so that the inclination angle of the hindbrain fixation assembly 2 is equal to the inclination angle required by the optimal operation position; then, the four-degree-of-freedom mechanical arm drives the expansion assembly 5 to the working position, the third electric push rod 502 drives the seventh support 503 to move to a proper position, the camera 505 determines the final pose of the expansion head by taking a picture, so that the expansion head is opposite to the lacrimal punctum of the patient, then, the third electric push rod 502 drives the seventh support 503 to move downwards continuously, so that the expansion head is inserted into the lacrimal punctum of the patient, further, the three fourth electric push rods 508 drive the rolling ball 510 to move downwards, further, the third pin 511 is driven to move along the ninth support 509 to the radial outward direction of the mirror frame 506 through the inclined plane on the third pin 511, so that the three expansion heads prop open the lacrimal punctum, and at the moment, a doctor can perform operation on the lacrimal duct through the lacrimal punctum.

Particularly, the camera 505 is connected with a display device, so that the operation scene can be watched through a large display screen, in addition, the camera 505 can be turned over manually, at the moment, a doctor can directly watch the operation part through the lens 507, and the lens 507 is a multi-focus convex mirror and can magnify the operation part.

When the operation is completed, the two second bolts 403 are manually pulled out, the second sliding frame 415 drives the second sliding rod 413 to be lifted through the rebounded fourth spring 411, the front supporting plate 10 is separated from the lower jaw of the patient, and when the fourth spring 411 rebounds to the balance position, the second bolts 403 are released, and the second sliding rod 413 is locked.

Further, the fifth link 304 is manually driven to make the third support 303 and the second support 302 approach, at this time, the roller 305 drives the first latch 306 to disengage from the saw teeth on the first slide bar 308, the first slide frame 312 drives the first slide bar 308 to lift through the rebounded second spring 311, the upper support plate 8 disengages from the contact with the forehead of the patient, and when the second spring 311 rebounds to the equilibrium position, the fifth link 304 is released, and the first slide bar 308 is locked.

The device is then moved sequentially in the sequence described above with reference to figures 4, 3 and 2 to finally reach the position shown in figure 1, where the device can be removed from contact with the patient's head.

The present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make various modifications without creative efforts from the above-described conception and fall within the scope of the present invention.