CN109620611B

CN109620611B - Thyroid surgery auxiliary device

Info

Publication number: CN109620611B
Application number: CN201910045621.4A
Authority: CN
Inventors: 王永波
Original assignee: First Affiliated Hospital of Zhengzhou University
Current assignee: First Affiliated Hospital of Zhengzhou University
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2021-03-23
Anticipated expiration: 2039-01-17
Also published as: CN109620611A

Abstract

A thyroid surgery auxiliary device solves the problems of short service life and poor auxiliary effect of the existing thyroid surgery auxiliary device, and comprises an operating bed, wherein a headrest capable of vertically sliding is arranged on the right side of the operating bed, and two symmetrical clamping plates capable of transversely sliding are arranged in the headrest; headrest below is equipped with the box fixed with the operation table, the rotatable axis of rotation that is equipped with in the box, the upper end of axis of rotation runs through the box and is equipped with the cam groove of spiral, but be equipped with lateral sliding's round pin axle in the headrest, be equipped with horizontal threaded rod in the headrest, the screw thread at threaded rod both ends revolves to opposite and respectively threaded connection has a lateral sliding's rectangular block, every rectangular block right-hand member is fixed with a rotatable first gear, every first gear top meshing has the first rack of fixing in the headrest, first gear edge articulates there is first connecting rod, the first connecting rod other end articulates there is the second connecting rod, the second connecting rod is articulated fixed with the grip block.

Description

Thyroid surgery auxiliary device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a thyroid surgery auxiliary device.

Background

The thyroid gland is a very important gland of vertebrates and belongs to an endocrine organ. In mammals, it is located under the neck nail-shaped hose, on both sides of the trachea. The thyroid gland of human is named after it is like butterfly, like the shield. The thyroid gland controls the rate of energy usage, protein production, and regulates the body's sensitivity to other hormones. The thyroid gland regulates these reactions by producing thyroxine, with triiodothyronine (T3) and thyroxine, also known as tetraiodothyronine (T4). Both regulate metabolism and growth rate, and also regulate other body systems. T3 and T4 were synthesized from iodine and tryptophane. The thyroid gland also produces Calcitonin (Calcitonin), which regulates the balance of calcium in the body.

For example, the thyroid operation auxiliary device for general surgery department clinical use with application number 201810159530.9 has the technical scheme that: including operation table 1, control switch group is installed at the top of operation table 1, and neck strutting arrangement is installed to the position that corresponds human neck on operation table 1, telescopic machanism is installed to the head of a bed position of operation table 1, and high adjusting device is installed to telescopic machanism's tip, angle adjusting device is installed to high adjusting device's tip, and angle adjusting device's end fixing has the headstock, external power supply's output is connected to control switch group's input electricity.

The patent has the following problems: 1) the telescopic rod is an electric telescopic rod and comprises a large number of electronic control units, the service life of an electric device is far shorter than that of a mechanical part, and the cost of the electric device is high, so that the electric telescopic rod is not beneficial to vigorous popularization; 2) need fix patient's head, everybody's head circumference size is all inequality, and electric telescopic handle can not carry out fine regulation.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the thyroid surgery auxiliary device, which effectively solves the problems of short service life and poor auxiliary effect of the conventional thyroid surgery auxiliary device.

In order to achieve the purpose, the multifunctional surgical bed comprises an operating bed, wherein a headrest capable of vertically sliding is arranged on the right side of the operating bed, two symmetrical clamping plates capable of transversely sliding are arranged in the headrest, a box body fixed with the operating bed is arranged below the headrest, a rotating shaft is rotatably arranged in the box body, the upper end of the rotating shaft penetrates through the box body and is provided with a spiral cam groove, a pin shaft capable of transversely sliding is arranged in the headrest, and the pin shaft is slidably inserted into the cam groove to form a structure that the rotating shaft rotates to drive the headrest to vertically lift;

a transverse threaded rod is arranged in the headrest, the thread turning directions of two ends of the threaded rod are opposite, and a rectangular block which slides transversely is respectively in threaded connection with the threaded rod, a rotatable first gear is fixed at the right end of each rectangular block, a first rack fixed in the headrest is meshed above each first gear, a first connecting rod is hinged to the edge of each first gear, a second connecting rod is hinged to the other end of each first connecting rod, and the second connecting rod is hinged and fixed with the clamping plate;

the box body is fixedly connected with the operating table through a plurality of vertical connecting rods, a first bevel gear is fixed on the outer circumference of the lower end of the rotating shaft, a second bevel gear is meshed on the outer side of the first bevel gear, a second gear is rotatably arranged in the box body, a first one-way gear is meshed on the outer side of the second gear, the first one-way gear is of a clockwise idle rotation structure and an anticlockwise rotation structure, an idler gear is further meshed on the outer side of the second gear, a second one-way gear is meshed on the outer side of the idler gear, the second one-way gear is of a clockwise idle rotation structure and an anticlockwise rotation structure, the first one-way gear and the second one-way gear are identical in structure and coaxially fixed, the second gear rotates clockwise to drive the first one-way gear to rotate anticlockwise, the second gear rotates anticlockwise through the idler gear, and the second bevel gear is coaxially.

Preferably, the third gear is coaxially connected in front of the second gear, a vertically sliding second rack is meshed outside the third gear, the upper end of the second rack penetrates through the box and is arranged above the box, a ring is fixed on the second rack, a first spring is sleeved on the second rack, the upper end of the first spring is fixedly connected with the ring, the lower end of the first spring is fixedly connected with the box, a second spring is fixed at the lower end of the second rack, and the second rack is pressed upwards by the second spring.

Preferably, first one-way gear and second one-way gear structure are the same, first one-way gear includes first one-way external gear, the inside star gear that is equipped with of first one-way external gear, star gear and gear shaft fixed connection, the star gear outside is gapped with first one-way external gear inboard, the outer fringe is equipped with wedge-shaped recess on the star gear, vertical limit in the recess is equipped with the round hole to the inboard, the round hole internal fixation has the third spring, the outside of third spring is fixed with spring ejector pin, spring ejector pin's the outside is equipped with rollable ball, the ball contacts with the interior terminal surface of first one-way external gear and constitutes first one-way pivoted structure.

Preferably, the second one-way gear comprises a second one-way external gear, a disc is arranged inside the second one-way external gear, the disc is fixedly connected with the gear shaft, a gap is reserved between the outer side of the disc and the inner side of the second one-way external gear, a wedge-shaped groove is formed in the outer edge of the disc, a round hole is formed in the inner side of a vertical edge in the groove, a fourth spring is fixed in the round hole, a spring push rod is fixed on the outer side of the fourth spring, a rolling ball is arranged on the outer side pushed by the spring, and the rolling ball is in contact with the inner end face of the second one-way external gear to.

Preferably, a sliding block capable of sliding vertically is arranged in the headrest, an arc-shaped bulge is arranged at the front end of the sliding block, a semi-cylindrical semi-circular ring is fixed at the rear end of the pin shaft, and the semi-circular ring is in contact with the bulge to form a structure that the bulge extrudes the semi-circular ring to insert the pin shaft into the cam groove;

the rear part of the pin shaft is fixed with a baffle, the front end of the baffle is fixed with a fifth spring, and the front end of the fifth spring is fixed in the headrest to form a structure that the fifth spring pushes the pin shaft to be separated from the cam groove.

Preferably, the headrest is internally provided with a plurality of positioning grooves positioned outside the sliding block, the sliding block is internally provided with a positioning head extending out of the sliding block, the positioning head and the positioning grooves are matched to form a structure for fixing the sliding block on the headrest, the sliding block is internally provided with a clamping block connected with the positioning head to form a structure for fixing the position of the clamping block extending out of the sliding block, and the clamping block is fixed in the sliding block through a sixth spring to form a structure for ejecting the sliding block out of the positioning head by the sixth spring all the time.

Preferably, the headrest lower extreme is equipped with vertical blind hole, and slidable is equipped with the guide bar in the blind hole, and the guide bar runs through headrest and box fixed connection, and the cover is equipped with the seventh spring on the guide bar, and seventh spring lower extreme and box contact, the upper end and the headrest contact of seventh spring.

Preferably, the middle part of the headrest is an arc-shaped groove, the two clamping plates are positioned at two ends of the arc-shaped groove, a T-shaped groove is formed in each of the front end and the rear end of the headrest respectively, a T-shaped block is slidably arranged in each T-shaped groove, the upper end of each T-shaped block penetrates through the headrest and the clamping plates to be fixedly connected, a vertical plate is fixed to the lower end of each T-shaped block, and the second connecting rod is hinged and fixed with the vertical plate.

According to the invention, a patient lies on the operating bed, the vertical position of the headrest is adjusted according to actual needs, the vertical position of the headrest can be rapidly fixed by stepping on the circular ring with feet, and then the threaded rod is rotated to enable the two clamping plates to clamp the head of the patient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of the overall axial structure of the present invention

FIG. 3 is a schematic view of a sliding structure of the clamping plate according to the present invention.

FIG. 4 is a schematic view of the sliding shaft side structure of the clamping plate of the present invention.

Fig. 5 is a structural schematic diagram of a gear shaft of a first one-way gear driven by a third gear according to the present invention.

FIG. 6 is a schematic axial view of a gear shaft of a first one-way gear driven by a third gear according to the present invention.

FIG. 7 is a schematic view of the structure of the rotating shaft and the pin shaft of the present invention.

Fig. 8 is a schematic view of the sectional structure of the case and the headrest of the present invention.

Fig. 9 is an enlarged view of the portion C in fig. 8.

Fig. 10 is an enlarged view of the part B in fig. 8.

Fig. 11 is an enlarged view of part a of fig. 7.

FIG. 12 is a schematic view of a first unidirectional gear of the present invention.

FIG. 13 is a structural diagram of a second unidirectional gear of the present invention.

Fig. 14 is a schematic view of the headrest of the present invention.

Fig. 15 is a schematic axial view of the headrest structure of the invention.

Detailed Description

The following description of the present invention will be made in further detail with reference to the accompanying drawings 1 to 15.

As shown in fig. 1-15, the invention comprises an operation bed 1, the operation bed 1 comprises a bed board and bed legs, a headrest 2 capable of vertically sliding is arranged at the right side of the operation bed 1, the headrest 2 is positioned at the head of the bed board, the upper end of the headrest 2 is positioned above the bed board, two symmetrical clamping plates 3 capable of transversely sliding are arranged in the headrest 2, the upper ends of the clamping plates 3 are positioned above the headrest 2, the inner sides of the clamping plates 3 are of arc structures and are fixed with rubber layers, so that the head of a patient can be conveniently clamped without causing injury to the patient;

a box body 4 fixed with the operating bed 1 is arranged below the headrest 2, the box body 4 is also positioned at the head of the operating bed, a rotating shaft 5 is rotatably arranged in the box body 4, the rotating shaft 5 is vertically arranged, the upper end of the rotating shaft 5 penetrates through the box body 4 and is provided with a spiral cam groove 6, the spiral angle of the cam groove 6 is smaller, the self-locking condition can be well met, a pin shaft 7 capable of sliding transversely is arranged in the headrest 2, the pin shaft 7 can be slidably inserted into the cam groove 6 to form a structure that the rotating shaft 5 rotates to drive the headrest 2 to vertically lift, a blind hole is arranged at the lower end of the right side of the headrest 2, the rotating shaft 5 can be slidably arranged in the blind hole, the headrest 2 is rectangular, a rectangular groove for the headrest 2 to slide through is arranged on the bed board, the rectangular groove plays a limiting role on the headrest 2, the vertical sliding, meanwhile, the self-locking is more convenient;

the headrest 2 is internally provided with a transverse threaded rod 8, the threaded rod 8 can rotate in the headrest 2, the thread turning directions of two ends of the threaded rod 8 are opposite and are respectively in threaded connection with a rectangular block 9 which slides transversely, the fast threads of the two rectangles are opposite, the rotation of the threaded rod 8 can drive the two rectangular blocks 9 to move relatively, the front end and the rear end of the threaded rod 8 are respectively arranged in the headrest 2, the front end of the threaded rod 8 is provided with a prismatic groove, a crank is inserted in the groove and drives the threaded rod 8 to rotate by driving the crank, the front end face of the box body 4 is superposed with the front end face of the bed plate, in the lifting process of the headrest 2, the threaded rod 8 is always positioned below the bed plate, the front end and the rear end of the threaded rod 8 do not exceed the box body 4, thereby the accidental injury of a user can be guaranteed, the right end of each rectangular block 9 is fixed with, the first gear 10 is rotatably connected with the rectangular block 9, a first rack 11 fixed in the headrest 2 is meshed above each first gear 10, a first connecting rod 12 is hinged at the edge of the first gear 10, a second connecting rod 13 is hinged at the other end of the first connecting rod 12, the second connecting rod 13 is hinged and fixed with the clamping plate 3, the threaded rod 8 enables the rectangular block 9 to generate transverse sliding in the rotating process, the rectangular block 9 transversely slides to drive the clamping plate 3 to generate the same horizontal movement, in the transverse sliding process of the rectangular block 9, because the first rack 11 is fixed in the headrest 2, the first gear 10 can generate rotation along with the rectangular block 9 in the sliding process, the first gear 10 rotates to pull the clamping plate 3 to slide forwards through the first connecting rod 12 and the second connecting rod 13, the clamping plate 3 has two sliding processes, the two sliding processes are overlapped, and accordingly the sliding speed of the clamping plate 3 is accelerated, in addition, the threaded connection has good self-locking performance, and the stability of the clamping plate 3 after sliding is guaranteed.

During initial position, round pin axle 7 inserts in the cam groove 6, and rotation through axis of rotation 5 makes headrest 2 carry out vertical lift, when going up and down to suitable position, rotates through crank drive threaded rod 8 to make the quick completion of two grip blocks 3 to the centre gripping of patient's head, and this device is through manual operation, can the manual control precision, can not cause the unnecessary injury to the patient.

The box body 4 is fixedly connected with the operating table 1 through a plurality of vertical connecting rods 14, the connecting rods 14 play a role in connection and fixation, the firmness of connection between the box body 4 and the operating table 1 is guaranteed, a first bevel gear 15 is fixed on the outer circumference of the lower end of the rotating shaft 5, the outer diameter of the lower end of the rotating shaft 5 can be properly reduced, and therefore the position of a space is reduced, and a second bevel gear 16 is meshed with the outer side of the first bevel gear 15;

a second gear 17 is rotatably arranged in the box body 4, the axis of the second gear 17 is horizontal, a first one-way gear 18 is meshed outside the second gear 17, the first one-way gear 18 is in a clockwise idling and anticlockwise rotating structure, an idler gear 19 is further meshed outside the second gear 17, a second one-way gear 20 is meshed outside the idler gear 19, the second one-way gear 20 is in a clockwise idling and anticlockwise rotating structure, the first one-way gear 18 and the second one-way gear 20 are identical in structure and coaxially fixed, the first one-way gear 18 is driven by the clockwise rotation of the second gear 17 to rotate anticlockwise, the second gear 17 is driven by the clockwise rotation of the second gear 17, the second one-way gear 17 is meshed with the first one-way gear 18, the first one-way gear 18 is driven to rotate anticlockwise at the moment, the second gear 17 drives the idler gear 19 to rotate anticlockwise, the idler gear 19 drives the second one-way gear 20 to idle clockwise, first one-way gear 18 produces anticlockwise rotation, thereby it carries out anticlockwise rotation to drive the gear shaft, when second gear 17 anticlockwise rotation, first one-way gear 18 idles, second gear 17 anticlockwise rotation drives second one-way gear 20 anticlockwise rotation through idler gear 19, second gear 17 corotation and reversal all can make first one-way gear 18's gear shaft carry out anticlockwise rotation, second bevel gear 16 and the coaxial fixed connection of second one-way gear 20, no matter second gear 17 corotation or reversal all can make first one-way gear 18's gear shaft carry out anticlockwise rotation, thereby make axis of rotation 5 rotate along a direction through first bevel gear 15 and second bevel gear 16.

A third gear 21 is coaxially connected in front of the second gear 17, a small frame can be fixed at the front end of the box 4, the third gear 21 is positioned in the small frame, a second rack 22 which slides vertically is engaged outside the third gear 21, the second rack 22 is also positioned in the small frame, the upper end of the second rack 22 penetrates through the box 4 and is arranged above the box 4 and is fixed with a ring, a first spring is sleeved on the first rack 11, the upper end of the first spring is fixedly connected with the ring, the lower end of the first spring is fixedly connected with the box 4, the lower end of the second rack 22 is fixed with a second spring 23, the second spring 23 presses the second rack 22 upwards, an operator can step on the ring by feet, the ring drives the second rack 22 to move downwards so as to drive the third gear 21 to rotate, so that the second gear 17 rotates, when the ring is loosened by feet, the second rack 22 is under the action of the first spring and the second spring 23, the second rack 22 slides upward to drive the third gear 21 to rotate in the reverse direction, and the third gear 21 drives the second gear 17 to rotate in the reverse direction, so that the rotation shaft 5 can rotate in one direction no matter the user steps on the headrest by pressing down or releasing the stepping, and the headrest 2 can rapidly ascend.

The first one-way gear 18 and the second one-way gear 20 have the same structure and both are structures capable of idle running clockwise and rotating anticlockwise, the first one-way gear 18 comprises a first one-way external gear 24, a star wheel 25 is arranged inside the first one-way external gear 24, the star wheel 25 is fixedly connected with a gear shaft, a gap is formed between the outer side of the star wheel 25 and the inner side of the first one-way external gear 24, a wedge-shaped groove is arranged on the upper outer edge of the star wheel 25, a circular hole is formed in the inner side of the vertical edge in the groove, a third spring 26 is fixed in the circular hole, a spring ejector rod 27 is fixed on the outer side of the third spring 26, a rolling ball 28 is arranged on the outer side of the spring ejector rod 27, the ball 28 is in contact with the inner end face of the first one-way external gear 24 to form a one-way rotating structure of the first one-, therefore, the first external unidirectional gear 24 can only rotate in a idling mode and cannot drive the gear shaft to rotate through the star wheel 25, when the first external unidirectional gear 24 rotates anticlockwise, the balls 28 are far away from the third spring 26 under the action of friction force, and the balls 28 are wedged with the star wheel 25 and the first external unidirectional gear 24, so that the gear is driven to rotate through the star wheel 25.

The second one-way gear 20 comprises a second one-way external gear 29, a disc 30 is arranged inside the second one-way external gear 29, the disc 30 is fixedly connected with the gear shaft, a gap is reserved between the outer side of the disc 30 and the inner side of the second one-way external gear 29, a wedge-shaped groove is formed in the outer edge of the disc 30, a round hole is formed in the inner side of the vertical edge in the groove, a fourth spring 31 is fixed in the round hole, a spring push rod 32 is fixed on the outer side of the fourth spring 31, a rolling ball 33 is arranged on the outer side pushed by the spring, the rolling ball 33 is contacted with the inner end face of the second one-way external gear 29 to form a one-way rotating structure of the second one-way gear 20, the second one-way gear 20.

A sliding block 34 capable of vertically sliding is arranged in the headrest 2, an arc-shaped bulge 35 is arranged at the front end of the sliding block 34, a semi-cylindrical semi-ring 36 is fixed at the rear end of the pin shaft 7, the semi-cylindrical semi-ring 36 is in contact with the bulge 35 to form a structure that the bulge 35 extrudes the semi-cylindrical ring 36 to insert the pin shaft 7 into the cam groove 6, the pin shaft 7 is pushed into the cam groove 6 when the bulge 35 is in contact with the semi-cylindrical ring 36 in the sliding process of the sliding block 34, and the pin shaft 7 is separated from the cam groove 6 when the bulge 35 is not;

the rear portion of the pin shaft 7 is fixed with a baffle 37, the front end of the baffle 37 is fixed with a fifth spring 38, the front end of the fifth spring 38 is fixed in the headrest 2 to form a structure that the fifth spring 38 pushes the pin shaft 7 to be separated from the cam groove 6, when the protrusion 35 is separated from the semicircular ring 36, the pin shaft 7 is separated from the cam groove 6 under the action of the fifth spring 38, and the headrest 2 can slide down quickly.

A plurality of positioning grooves positioned at the outer side of the sliding block 34 are arranged in the headrest 2, positioning heads 39 extending out of the sliding block 34 are arranged in the sliding block 34, the number of the positioning grooves is larger than that of the positioning heads 39, the positioning heads 39 and the positioning grooves are matched to form a structure that the sliding block 34 is fixed on the headrest 2, when sliding block 34 carries out vertical slip, the location head 39 inserts and to make protruding 35 and the contact of semicircle ring 36 in the constant head tank, guarantee that round pin axle 7 inserts in the cam groove 6, sliding block 34 is when carrying out vertical slip, the location head 39 inserts in the next constant head tank, protruding 35 and the separation of semicircle ring 36 this moment, round pin axle 7 can separate with cam groove 6 this moment, be equipped with the fixture block 40 of connecting location head 39 in the sliding block 34, constitute fixture block 40 and stretch out the fixed structure in sliding block 34 rigidity, fixture block 40 is fixed in sliding block 34 through sixth spring 41, constitute sixth spring 41 and will fix the outside structure of location head 39 ejecting sliding block 34 all the time.

The lower extreme of headrest 2 is equipped with vertical blind hole, and slidable is equipped with guide bar 42 in the blind hole, and guide bar 42 runs through headrest 2 and box 4 fixed connection, and the cover is equipped with seventh spring 43 on the guide bar 42, and seventh spring 43 lower extreme and box 4 contact, the upper end and the headrest 2 contact of seventh spring 43, and guide bar 42 has played the effect of direction, guarantees that headrest 2 can only carry out vertical slip.

The middle part of the headrest 2 is an arc-shaped groove, the two clamping plates 3 are positioned at two ends of the arc-shaped groove, a T-shaped groove is formed in each of the front end and the rear end of the headrest 2 respectively, a T-shaped block 44 is arranged in each T-shaped groove in a sliding mode, the upper end of each T-shaped block 44 penetrates through the headrest 2 and the clamping plates 3 and is fixedly connected with the headrest, a vertical plate 45 is fixed to the lower end of each T-shaped block 44, the second connecting rod 13 is hinged and fixed to the vertical plate 45, and the T-shaped blocks 44 can be matched with the T-shaped grooves to guarantee that the.

When the invention is used, an operator steps on the second rack 22 with feet, in the process that the operator steps on the second rack 22 in a reciprocating manner, the second rack 22 drives the rotating shaft 5 to rotate around one direction in the ascending and descending processes, the rotating shaft 5 is provided with the spiral cam groove 6, the pin shaft 7 is inserted into the cam groove 6, the rotation of the rotating shaft 5 drives the headrest 2 to vertically slide, so that the headrest 2 is quickly lifted to a required position, the position of the headrest 2 after ascending is reliably fixed due to the small spiral angle of the cam groove 6, the crank is inserted into the spiral rod, the spiral rod is rotated, the spiral rod rotates to quickly drive the two clamping plates 3 to approach each other, the head of a patient is clamped, after the operation is finished, the threaded rod 8 is reversely rotated to separate the two clamping plates 3, and the sliding block 34 is pressed, the protrusion 35 is separated from the semicircular ring 36, at this time, the pin 7 is separated from the cam groove 6, the headrest 2 rapidly falls, and the kinetic energy generated by the downward sliding of the headrest 2 is offset by the seventh spring 43.

Compared with the prior art, the invention has the following advantages: 1) the head of the patient is placed in the groove of the headrest 2, and the patient is initially positioned; 2) through the cooperation of the first one-way gear 18 and the second one-way gear 20, through the arrangement of the idle gear 19, the gear shaft of the first one-way gear 18 can rotate anticlockwise no matter the third gear 21 rotates forwards or backwards, so that the rotating shaft 5 rotates along one direction, and the headrest 2 can rapidly ascend; 3) the operator tramples the circular ring, no matter tramples downwards or looses, the rotating shaft 5 can rotate in one direction, and the trampling by feet is more convenient and the operation is simple; 4) all parts are completed by adopting a mechanical structure, the maintenance is convenient, the lubricating oil is coated after long-term use, the service life is long, and the cost is low; 5) when the two clamping plates 3 move relatively, the speed is high, the head of a patient can be clamped quickly, and the manual operation is adopted, so that the force is convenient to control; 6) after the use is finished, the clamping plate 3 is loosened, the sliding block 34 is slid, the pin shaft 7 is not inserted into the cam groove 6 any more, and the headrest 2 can slide down rapidly.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The thyroid surgery auxiliary device comprises an operating bed (1), wherein a vertically-slidable headrest (2) is arranged on the right side of the operating bed (1), two symmetrical clamping plates (3) capable of sliding transversely are arranged in the headrest (2), and the thyroid surgery auxiliary device is characterized in that a box body (4) fixed with the operating bed (1) is arranged below the headrest (2), a rotating shaft (5) is rotatably arranged in the box body (4), the upper end of the rotating shaft (5) penetrates through the box body (4) and is provided with a spiral cam groove (6), a transversely-slidable pin shaft (7) is arranged in the headrest (2), and the pin shaft (7) can be slidably inserted into the cam groove (6) to form a structure that the rotating shaft (5) rotates to drive the headrest (2) to vertically lift;

a transverse threaded rod (8) is arranged in the headrest (2), the thread turning directions of two ends of the threaded rod (8) are opposite, and a rectangular block (9) capable of sliding transversely is in threaded connection with each other respectively, a rotatable first gear (10) is fixed at the right end of each rectangular block (9), a first rack (11) fixed in the headrest (2) is meshed above each first gear (10), a first connecting rod (12) is hinged to the edge of each first gear (10), a second connecting rod (13) is hinged to the other end of each first connecting rod (12), and the second connecting rod (13) is hinged and fixed with the clamping plate (3);

the box body (4) is fixedly connected with the operating table (1) through a plurality of vertical connecting rods (14), a first bevel gear (15) is fixed on the outer circumference of the lower end of the rotating shaft (5), a second bevel gear (16) is meshed on the outer side of the first bevel gear (15), a second gear (17) is rotatably arranged in the box body (4), a first one-way gear (18) is meshed on the outer side of the second gear (17), the first one-way gear (18) is of a clockwise idling and anticlockwise rotating structure, an idle gear (19) is further meshed on the outer side of the second gear (17), a second one-way gear (20) is meshed on the outer side of the idle gear (19), the second one-way gear (20) is of a clockwise idling and anticlockwise rotating structure, the first one-way gear (18) and the second one-way gear (20) are identical in structure and coaxially fixed, the second gear (17) rotates clockwise to drive the first one-way gear (18) to, the second gear (17) rotates anticlockwise and drives the second one-way gear (20) to rotate anticlockwise through the idler gear (19), and the second bevel gear (16) is coaxially and fixedly connected with the second one-way gear (20).

2. The thyroid surgery auxiliary device according to claim 1, wherein a third gear (21) is coaxially connected in front of the second gear (17), a second rack (22) which vertically slides is engaged outside the third gear (21), the upper end of the second rack (22) penetrates through the box (4) and is arranged above the box (4) and is fixed with a circular ring, a first spring is sleeved on the second rack (22), the upper end of the first spring is fixedly connected with the circular ring, the lower end of the first spring is fixedly connected with the box (4), a second spring (23) is fixed at the lower end of the second rack (22), and the second spring (23) presses the second rack (22) upwards.

3. The thyroid surgery auxiliary device according to claim 1, wherein the first one-way gear (18) and the second one-way gear (20) have the same structure, the first one-way gear (18) comprises a first one-way external gear (24), a star wheel (25) is arranged inside the first one-way external gear (24), the star wheel (25) is fixedly connected with the gear shaft, a gap is reserved between the outer side of the star wheel (25) and the inner side of the first one-way external gear (24), a wedge-shaped groove is formed in the outer edge of the star wheel (25), a round hole is formed in the inner side of the vertical edge in the groove, a third spring (26) is fixed in the round hole, a spring ejector rod (27) is fixed on the outer side of the third spring (26), a rolling ball (28) is arranged on the outer side of the spring ejector rod (27), and the ball (28) is in contact with the inner end face of the first one-way external gear (.

4. The thyroid surgery auxiliary device according to claim 1, wherein the second one-way gear (20) comprises a second one-way external gear (29), a disk (30) is arranged inside the second one-way external gear (29), the disk (30) is fixedly connected with the gear shaft, a gap is formed between the outer side of the disk (30) and the inner side of the second one-way external gear (29), a wedge-shaped groove is formed in the upper outer edge of the disk (30), a circular hole is formed in the inner side of the vertical edge in the groove, a fourth spring (31) is fixed in the circular hole, a spring push rod (32) is fixed on the outer side of the fourth spring (31), a rolling ball (33) capable of rolling is arranged on the outer side pushed by the spring, and the rolling ball (33) is in contact with the inner end surface of the second one-way external gear (29) to form a one-.

5. The thyroid surgery auxiliary device according to claim 1, wherein a sliding block (34) capable of sliding vertically is arranged in the headrest (2), an arc-shaped protrusion (35) is arranged at the front end of the sliding block (34), a semi-cylindrical semi-ring (36) is fixed at the rear end of the pin shaft (7), and the semi-cylindrical semi-ring (36) is in contact with the protrusion (35) to form a structure that the protrusion (35) extrudes the semi-cylindrical semi-ring (36) to insert the pin shaft (7) into the cam groove (6);

a baffle (37) is fixed to the rear portion of the pin shaft (7), a fifth spring (38) is fixed to the front end of the baffle (37), and the front end of the fifth spring (38) is fixed in the headrest (2) to form a structure that the pin shaft (7) is pushed by the fifth spring (38) to be separated from the cam groove (6).

6. The thyroid surgery auxiliary device according to claim 5, wherein a plurality of positioning grooves are formed in the headrest (2) and located outside the sliding block (34), positioning heads (39) extending out of the sliding block (34) are formed in the sliding block (34), the positioning heads (39) and the positioning grooves are matched to form a structure that the sliding block (34) is fixed on the headrest (2), clamping blocks (40) connected with the positioning heads (39) are formed in the sliding block (34) and form a structure that the clamping blocks (40) extend out of the sliding block (34) in a fixed position, the clamping blocks (40) are fixed in the sliding block (34) through sixth springs (41), and the sixth springs (41) are formed to be a structure that the sliding block positioning heads (39) are always pushed out of the sliding block (34).

7. The thyroid surgery auxiliary device according to claim 1, wherein the lower end of the headrest (2) is provided with a vertical blind hole, a guide rod (42) is slidably arranged in the blind hole, the guide rod (42) penetrates through the headrest (2) and is fixedly connected with the box body (4), a seventh spring (43) is sleeved on the guide rod (42), the lower end of the seventh spring (43) is in contact with the box body (4), and the upper end of the seventh spring (43) is in contact with the headrest (2).

8. The thyroid surgery auxiliary device according to claim 1, wherein the middle of the headrest (2) is an arc-shaped groove, the two clamping plates (3) are arranged at two ends of the arc-shaped groove, the front end and the rear end of the headrest (2) are respectively provided with a T-shaped groove, a T-shaped block (44) is slidably arranged in each T-shaped groove, the upper end of each T-shaped block (44) penetrates through the headrest (2) and is fixedly connected with the clamping plates (3), the lower end of each T-shaped block (44) is fixedly provided with a vertical plate (45), and the second connecting rod (13) is hinged and fixed with the vertical plate (45).