阅读说明：本技术 一种重症护理用患者转运架 (Patient transferring frame for critical care ) 是由 王娟 于 2021-07-01 设计创作，主要内容包括：本发明公开一种重症护理用患者转运架,涉及重症护理用患者转运架领域。该重症护理用患者转运架包括支撑座、转动组件、升降组件、限位组件、卡块,支撑座的下表面固定连接有四个滑轮,支撑座的上表面设置有转运架主体,转运架主体的正面连接有支架。通过设置的转动组件,通过转动转轮使得第二下连接杆、第二上连接杆、第一下连接杆、第一上连接杆,随之进行转动,此时转运架主体进行转动,发生倾斜,当倾斜到合适的位置,反向转动转轮对蜗杆进行固定,此时通过缓慢移动患者,使得其沿着转运架主体滑动到检测仪器上。(The invention discloses a patient transferring frame for intensive care, and relates to the field of patient transferring frames for intensive care. This intensive care therapy transports frame with patient includes supporting seat, runner assembly, lifting unit, spacing subassembly, fixture block, and four pulleys of the lower fixed surface of supporting seat are connected with, and the upper surface of supporting seat is provided with transports frame main part, and the front of transporting frame main part is connected with the support. Through the runner assembly who sets up, make connecting rod, first connecting rod, the first connecting rod of going up under the second through rotating the runner, rotate thereupon, the transport frame main part rotates this moment, takes place the slope, when inclining to suitable position, the worm is fixed to the counter-rotation runner, through the slow moving patient this moment for it slides to detecting instrument along transport frame main part on.)

1. The utility model provides a patient transports frame for intensive care which characterized in that includes:

the device comprises a supporting seat (1), wherein four pulleys (101) are fixedly connected to the lower surface of the supporting seat (1), a transfer frame main body (103) is arranged on the upper surface of the supporting seat (1), and a support (104) is connected to the front side of the transfer frame main body (103);

a rotating assembly (2), wherein the rotating assembly (2) comprises a first bevel gear (201) and two second bevel gears (202), and the first bevel gear (201) is meshed with the two second bevel gears (202);

the lifting assembly (3) comprises two first lower connecting rods (301), two first upper connecting rods (302), two second lower connecting rods (303) and two second upper connecting rods (304), the first lower connecting rods (301) are rotatably connected with the first upper connecting rods (302), and the second lower connecting rods (303) are rotatably connected with the second upper connecting rods (304);

the limiting component (4) comprises a worm (401) and a worm wheel (402), and the worm (401) is meshed with the worm wheel (402);

the fixture block (5), the fixture block (5) is connected on the inner walls of the bracket (104) and the transfer rack main body (103) in a sliding mode.

2. The intensive care patient transfer rack according to claim 1, wherein: two push handles (102) of side fixedly connected with of supporting seat (1), and one side fixedly connected with connecting seat (403) that supporting seat (1) is opposite, two first spout (105) have been seted up to the upper surface of supporting seat (1), sliding connection has first slider (206) on the inner wall of first spout (105), the last fixed surface of first slider (206) is connected with rack (205), the upper surface meshing of rack (205) is connected with master gear (204), first gear (207) and second gear (208).

3. The intensive care patient transfer rack according to claim 2, wherein: two equal fixedly connected with first pivot (203) in the side that main gear (204) is relative, two first pivot (203) respectively with two second bevel gears (202) fixed connection, second gear (208) meshing is connected with third gear (209), two equal fixedly connected with second pivot (210) between first gear (207), two second gear (208) and two third gear (209), and two first gear (207), two second gear (208) and two third gear (209) rotate through second pivot (210) and connect the upper surface at supporting seat (1).

4. The intensive care patient transfer rack according to claim 3, wherein: two first gear (207) and two third gear (209) are fixed connection respectively and are connected in the side of different first lower connecting rod (301) and second lower connecting rod (303), the other end of first lower connecting rod (301) and second lower connecting rod (303) is connected with the one end rotation of first upper connecting rod (302) and second upper connecting rod (304) respectively, two first upper connecting rod (302) and two second upper connecting rod (304) relative one side is equallyd divide and is do not fixedly connected with first gear (207) and third gear (209), third gear (209) meshing is connected with second gear (208), the surface of second gear (208) and first gear (207) meshes with the lower surface of rack (205).

5. The intensive care patient transfer rack according to claim 4, wherein: the utility model discloses a gear rack, including rack (205), second spout (306), first slider (206), two fixed blocks (307) of side fixedly connected with of fixing base (305), first gear (207), second gear (208) and third gear (209) rotate respectively and connect on the inner wall of two fixed blocks (307), the top of rack (205) is provided with fixing base (305), second spout (306) have been seted up to the lower surface of fixing base (305), first slider (206) sliding connection is on the inner wall of second spout (306).

6. The intensive care patient transfer rack according to claim 5, wherein: two the upper surface of fixing base (305) all rotates and is connected with turning block (308), two turning block (308) sliding connection is at the lower surface of transport frame main part (103), spacing groove (309) have been seted up to the lower surface of transport frame main part (103), two turning block (308) sliding connection is on the inner wall of spacing groove (309), the front of transport frame main part (103) is rotated and is connected with support (104), draw-in groove (502) have been seted up at the back of support (104), the lower surface sliding connection of transport frame main part (103) has pull block (503), pull block (503) fixed connection is at the lower surface of fixture block (5).

7. The intensive care patient transfer rack according to claim 1, wherein: the clamping block (5) is connected to the inner wall of the clamping groove (502) in a sliding mode, a spring (501) is fixedly connected to one side, away from the clamping groove (502), of the clamping block (5), the spring (501) is fixedly connected to the inner wall of the transfer frame main body (103), and the spring (501) is in a compression state all the time.

8. The intensive care patient transfer rack according to claim 1, wherein: the inner wall of the first bevel gear (201) is inserted with a third rotating shaft (211), the outer surface of the third rotating shaft (211) is sleeved with a worm wheel (402), the front surface of the worm (401) penetrates through the connecting seat (403) to extend outwards, and one end of the worm extending outwards is fixedly connected with a rotating handle (404).

9. The intensive care patient transfer rack according to claim 8, wherein: the side threaded connection of connecting seat (403) has threaded rod (405), one side fixedly connected with arc stopper (406) of threaded rod (405), arc stopper (406) sliding connection is on the inner wall of connecting seat (403), and arc stopper (406) meshes with worm (401) mutually, threaded rod (405) is located external one side fixedly connected with runner (407).

Technical Field

The invention relates to the technical field of patient transfer frames for intensive care, in particular to a patient transfer frame for intensive care.

Background

The transfer frame is a special medical bed used for transferring patients between hospitals and sickbeds and transferring the patients from an operating table to a ward and from an ambulance, solves the difficulty that the patients are transferred from the operating table to the ward after operation by using the transfer frame, reduces the pain and difficulty brought to the patients when the patients are transferred by lifting hands in the prior art, is used in all hospitals and is necessary medical equipment of the hospitals.

The existing transfer frame is mostly in a fixed form, when a patient needs to be carried to carry out various detections, the patient can move inconveniently, the patient is not convenient to move on the transfer frame and the detector, at the moment, the patient can only be carried by medical staff, when the weight of the patient is too heavy, the method needs more manpower to carry, and then the patient can be seriously injured due to mistaken collision during carrying, so that the patient transfer frame for critical care is provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention discloses a patient transferring frame for critical care, which aims to solve the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a patient transport rack for intensive care includes:

the lower surface of the supporting seat is fixedly connected with four pulleys, the upper surface of the supporting seat is provided with a transfer frame main body, and the front side of the transfer frame main body is connected with a support;

the rotating assembly comprises a first bevel gear and two second bevel gears, and the first bevel gear is meshed with the two second bevel gears;

the lifting assembly comprises two first lower connecting rods, two first upper connecting rods, two second lower connecting rods and two second upper connecting rods, the first lower connecting rods are rotatably connected with the first upper connecting rods, and the second lower connecting rods are rotatably connected with the second upper connecting rods;

the limiting assembly comprises a worm and a worm wheel, and the worm is meshed with the worm wheel;

and the clamping blocks are connected to the inner walls of the bracket and the transfer frame main body in a sliding manner.

Preferably, the two push handles are fixedly connected to the side faces of the supporting seat, the connecting seat is fixedly connected to the side face opposite to the supporting seat, two first sliding grooves are formed in the upper surface of the supporting seat, a first sliding block is connected to the inner wall of each first sliding groove in a sliding mode, a rack is fixedly connected to the upper surface of each first sliding block, and a main gear, a first gear and a second gear are connected to the upper surface of each rack in a meshed mode.

Preferably, the two main gears are fixedly connected with first rotating shafts on the side surfaces opposite to each other, the two first rotating shafts are fixedly connected with the two second bevel gears respectively, the second gears are connected with third gears in a meshed manner, second rotating shafts are fixedly connected between the two first gears, the two second gears and the two third gears respectively, and the two first gears, the two second gears and the two third gears are rotatably connected to the upper surface of the supporting seat through the second rotating shafts.

Preferably, two the side of connecting rod under first gear and two third gears fixed connection respectively in the difference under first connecting rod and the second, the other end of connecting rod rotates with the one end of connecting rod on first connecting rod and the second respectively under first connecting rod and the second and is connected, two first gear and the third gear of fixedly connected with are equallyd divide to the relative one side of connecting rod on first connecting rod and two seconds, third gear engagement is connected with the second gear, the surface of second gear and first gear meshes with the lower surface of rack mutually.

Preferably, the upper surface of rack fixedly connected with first slider, the top of rack is provided with the fixing base, the second spout has been seted up to the lower surface of fixing base, first slider sliding connection is on the inner wall of second spout, two second spouts of side fixedly connected with of fixing base, first gear, second gear and third gear rotate respectively and connect on the inner wall of two second spouts.

Preferably, two the upper surface of fixing base all rotates and is connected with the turning block, two turning block sliding connection is at the lower surface of transport frame main part, the spacing groove has been seted up to the lower surface of transport frame main part, two turning block sliding connection is on the inner wall of spacing groove, the front of transport frame main part is rotated and is connected with the support, the draw-in groove has been seted up at the back of support, the lower surface sliding connection of transport frame main part has the piece of drawing, draw a fixed connection at the lower surface of fixture block.

Preferably, the fixture block is connected to the inner wall of the clamping groove in a sliding mode, one side, far away from the clamping groove, of the fixture block is fixedly connected with a spring, the spring is fixedly connected to the inner wall of the transfer frame main body, and the spring is in a compression state all the time.

Preferably, a third rotating shaft is inserted into the inner wall of the first bevel gear, a worm wheel is sleeved on the outer surface of the third rotating shaft, the front surface of the worm penetrates through the connecting seat and extends outwards, and one end of the worm, which extends outwards, is fixedly connected with a rotating handle.

Preferably, the side threaded connection of connecting seat has the threaded rod, one side fixedly connected with arc stopper of threaded rod, arc stopper sliding connection is on the inner wall of connecting seat, and arc stopper meshes with the worm mutually, the threaded rod is located external one side fixedly connected with runner.

The invention discloses a patient transferring frame for critical care, which has the following beneficial effects:

1. this intensive care patient transports frame is through the spacing subassembly that sets up, draw the piece through outside pulling this moment, it slides on the inner wall of transporting a main part to have driven the fixture block, compress the spring simultaneously, fixture block and draw-in groove phase separation this moment, can put down the support this moment, the patient of being convenient for moves to detecting instrument in transporting a main part, this moment through rotating the runner, make the threaded rod remove, thereby it removes to have driven the arc stopper, arc stopper and worm phase separation this moment, can rotate the rotation handle this moment, thereby it rotates to have driven the worm, thereby make the worm wheel with it engaged with rotate, thereby the rotation along with the worm wheel has driven the third pivot and has rotated.

2. Under the action of the rotating component and the lifting component, the patient transport rack for intensive care makes the first bevel gear rotate through the rotating rotation of the third rotating shaft, so that the two second bevel gears rotate in opposite directions, at the moment, the two first rotating shafts and the two main gears also rotate in opposite directions, so that the two racks meshed with the first rotating shafts move in opposite directions under the rotation of the two main gears, the first lower connecting rod and the second lower connecting rod are driven to rotate in opposite directions, meanwhile, the second upper connecting rod rotationally connected with the second lower connecting rod and the first upper connecting rod rotationally connected with the first lower connecting rod rotate along with the first upper connecting rod, at the moment, the two racks slide in opposite directions, so that one fixed seat moves upwards and the other fixed seat moves downwards, at the moment, the main body of the transport rack rotates and tilts, when the transport rack tilts to a proper position, the counter-rotating wheels fix the worm, by moving the patient slowly, so that it slides along the gantry body onto the detection instrument.

3. This severe nursing is with patient's transport frame fixture block one side fixedly connected with spring far away from the draw-in groove, spring fixed connection is on the inner wall of transport frame main part, and the spring is in compression state all the time, makes fixture block and draw-in groove mesh through the spring, draws the piece to make the fixture block remove through the pulling to make fixture block and support phase separation, thereby make the support rotate and make it receive and release, be convenient for protect the patient, and make things convenient for the patient to get off from transport frame main part.

Drawings

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

FIG. 2 is a schematic view of the present invention with the structure broken away;

FIG. 3 is a schematic view of a portion of the present invention;

FIG. 4 is a schematic view of a rotating assembly according to the present invention;

FIG. 5 is a schematic view of the upper structure of the supporting base according to the present invention;

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

FIG. 7 is a schematic illustration of the lift assembly of the present invention shown disassembled;

FIG. 8 is a schematic view of a spacing assembly of the present invention;

FIG. 9 is a schematic illustration of the spacing assembly of the present invention;

FIG. 10 is a schematic view of the stent structure of the present invention.

In the figure: 1. a supporting seat; 101. a pulley; 102. pushing the handle; 103. a transfer rack main body; 104. a support; 105. a first chute; 2. a rotating assembly; 201. a first bevel gear; 202. a second bevel gear; 203. a first rotating shaft; 204. a main gear; 205. a rack; 206. a first slider; 207. a first gear; 208. a second gear; 209. a third gear; 210. a second rotating shaft; 211. a third rotating shaft; 3. a lifting assembly; 301. a first lower connecting rod; 302. a first upper connecting rod; 303. a second lower connecting rod; 304. a second upper connecting rod; 305. a fixed seat; 306. a second chute; 307. a fixed block; 308. rotating the block; 309. a limiting groove; 4. a limiting component; 401. a worm; 402. a worm gear; 403. a connecting seat; 404. rotating the handle; 405. a threaded rod; 406. an arc-shaped limiting block; 407. a rotating wheel; 5. a clamping block; 501. a spring; 502. a card slot; 503. and (5) pulling the block.

Detailed Description

The first embodiment is as follows:

the embodiment of the invention discloses a patient transferring frame for critical care,

as shown in fig. 1-4, the device comprises a supporting seat 1 and a rotating assembly 2, four pulleys 101 are fixedly connected to the lower surface of the supporting seat 1, a transport frame main body 103 is arranged on the upper surface of the supporting seat 1, a support 104 is connected to the front surface of the transport frame main body 103, the rotating assembly 2 comprises a first bevel gear 201 and two second bevel gears 202, and the first bevel gear 201 is engaged with the two second bevel gears 202.

Four pulleys 101 of lower fixed surface of supporting seat 1, the upper surface of supporting seat 1 is provided with transports frame main part 103, the front of transporting frame main part 103 is connected with support 104, two push-pull handles 102 of side fixedly connected with of supporting seat 1, make supporting seat 1 remove through promoting two push-pull handles 102, conveniently transport the patient under the effect of four pulleys 101, and supporting seat 1 opposite one side fixedly connected with connecting seat 403, two first spouts 105 have been seted up to the upper surface of supporting seat 1, sliding connection has first slider 206 on the inner wall of first spout 105, the last fixed surface of first slider 206 is connected with rack 205, sliding connection is on the inner wall of first spout 105 through first slider 206, make rack 205's shift position certain.

The rotating assembly 2 comprises a first bevel gear 201 and two second bevel gears 202, a third rotating shaft 211 is inserted into the inner wall of the first bevel gear 201, the first bevel gear 201 is engaged with the two second bevel gears 202, a first rotating shaft 203 is fixedly connected to one side of each of the two second bevel gears 202, a main gear 204 is fixedly connected to one side of each of the two first rotating shafts 203, the other side of each of the two first rotating shafts 203 is opposite to the other side of each of the two first rotating shafts 203, the main gear 204 is engaged with a rack 205, a first gear 207 and a second gear 208 are engaged with the upper surface of the rack 205, a third gear 209 is engaged with the second gear 208, second rotating shafts 210 are fixedly connected between the two first gears 207, the two second gears 208 and the two third gears 209, and the two first gears 207, the two second gears 208 and the two third gears 209 are rotatably connected to the upper surface of the support base 1 through the second rotating shafts 210.

As shown in fig. 5 to 7, the lifting assembly 3 is included, the lifting assembly 3 includes two first lower connecting rods 301, two first upper connecting rods 302, two second lower connecting rods 303 and two second upper connecting rods 304, the first lower connecting rods 301 are rotatably connected with the first upper connecting rods 302, and the second lower connecting rods 303 are rotatably connected with the second upper connecting rods 304.

The lifting assembly 3 comprises two first lower connecting rods 301 and two first upper connecting rods 302, the two first lower connecting rods 301 are rotatably connected with the first upper connecting rod 302, the two second lower connecting rods 303 are rotatably connected with the second upper connecting rod 304, the two first gears 207 and the two third gears 209 are respectively and fixedly connected with the side surfaces of the different first lower connecting rods 301 and the different second lower connecting rods 303, the other ends of the first lower connecting rods 301 and the second lower connecting rods 303 are respectively and rotatably connected with one ends of the first upper connecting rods 302 and the second upper connecting rods 304, the opposite sides of the two first upper connecting rods 302 and the two second upper connecting rods 304 are respectively and fixedly connected with the first gears 207 and the third gears 209, the third gears 209 are connected with the second gears 208 in a meshed manner, and the outer surfaces of the second gears 208 and the first gears 207 are meshed with the lower surface of the rack 205.

The upper surface of the rack 205 is fixedly connected with a first sliding block 206, a fixed seat 305 is arranged above the rack 205, a second sliding groove 306 is formed in the lower surface of the fixed seat 305, the first sliding block 206 is connected to the inner wall of the second sliding groove 306 in a sliding mode, two fixed blocks 307 are fixedly connected to the side face of the fixed seat 305, and the first gear 207, the second gear 208 and the third gear 209 are respectively connected to the inner walls of the two fixed blocks 307 in a rotating mode.

The upper surface of fixing base 305 all rotates and is connected with turning block 308, and two turning block 308 sliding connection have been seted up spacing groove 309 at the lower surface of transport frame main part 103 in the lower surface of transport frame main part 103, and two turning block 308 sliding connection are on the inner wall of spacing groove 309, and the front of transport frame main part 103 rotates and is connected with support 104.

Rotate through first bevel gear 201, it moves to drive rack 205, thereby it carries out the rotation of equidirectional to have driven first gear 207 and second gear 208, make third gear 209 opposite with the direction of rotation of first gear 207 under the effect of second gear 208, thereby make two first lower connecting rod 301 rotate mutually in opposite directions, two second lower connecting rod 303 rotate relatively simultaneously, it carries out the rotation of opposite direction to have driven first lower connecting rod 301 and second lower connecting rod 303 simultaneously, make two racks 205 carry out the slip of opposite direction under the effect of second lower connecting rod 303 and first lower connecting rod 301, thereby make two fixing bases 305 an rebound, a lapse, thereby make the transport frame main part 103 rotate, take place the slope, be convenient for remove the patient.

The working principle is as follows: first, by rotating the third rotating shaft 211, the first bevel gear 201 is rotated as the third rotating shaft 211 is rotated, and thus the two second bevel gears 202, in opposite directions, the two first rotation shafts 203 and the two main gears 204 are also rotated in opposite directions, so that the two racks 205 engaged therewith are moved in opposite directions by the rotation of the two main gears 204, at the same time, the two first sliding blocks 206 slide on the inner wall of the first sliding chute 105, and, with the movement of the rack 205, thereby causing the first gear 207 and the second gear 208 to rotate in the same direction, the third gear 209 is rotated in the opposite direction to the first gear 207 by the second gear 208, so that the two first lower connecting rods 301 rotate oppositely, and simultaneously the two second lower connecting rods 303 rotate oppositely, at the same time, the first lower connecting rod 301 and the second lower connecting rod 303 are driven to rotate in opposite directions.

The second upper connecting rod 304 rotatably connected to the second lower connecting rod 303, the first upper connecting rod 302 rotatably connected to the first lower connecting rod 301, and then the first gear 207 and the third gear 209 fixedly connected to the first upper connecting rod 302 and the second upper connecting rod 304 rotate, the second gear 208 is driven to rotate by the rotation of the third gear 209, at this time, the two racks 205 slide in opposite directions, so that the two fixing bases 305 move upward and downward, and the two rotating blocks 308 and the four fixing blocks 307 move in the same direction, and the two rotating blocks 308 rotate relative to the fixing bases 305 under the action of the transporting rack main body 103 along with the movement of the rotating blocks 308, and the two rotating blocks 308 slide on the inner wall of the limiting groove 309 while rotating, so that the transporting rack main body 103 rotates, tilting takes place and when tilted into place, the worm 401 is fixed by counter-rotating the wheel 407, by slowly moving the patient so that it slides along the gantry body 103 onto the detection apparatus.

After the detection is finished, the bracket 104 is turned over, the bracket 104 extrudes the fixture block 5, the fixture block is enabled to move in the same way, when the fixture block is superposed with the clamping groove 502, the fixture block is inserted into the inner wall of the clamping groove 502 under the action of the spring 501, at the moment, one part of the patient is moved to the surface of the transport rack main body 103 to move in the opposite direction, the transport rack main body 103 is enabled to tilt in the opposite direction, the patient is enabled to be separated from the instrument, when the fixture block is rotated to a proper position, the patient is pushed to move to the center of the transport rack main body 103, the next part of the patient is convenient to move for detection, the carrying of medical staff is avoided through the instrument, and meanwhile, the situation of injury aggravation caused by mistaken collision is avoided.

Example two:

as shown in fig. 8 and 9, including spacing subassembly 4, spacing subassembly 4 includes worm 401 and worm wheel 402, worm 401 meshes with worm wheel 402, third pivot 211 is pegged graft on the inner wall of worm wheel 402, the front of worm 401 runs through connecting seat 403 and outwards extends, and the one end fixedly connected with who outwards extends rotates handle 404, the side threaded connection of connecting seat 403 has threaded rod 405, one side fixedly connected with arc stopper 406 of threaded rod 405, arc stopper 406 sliding connection is on the inner wall of connecting seat 403, and arc stopper 406 meshes with worm 401, threaded rod 405 is located one side fixedly connected with runner 407 of external world.

The arc-shaped limiting block 406 is driven to move by rotating the rotating wheel 407, so that the arc-shaped limiting block 406 is separated from the worm 401, the worm wheel 402 is driven to rotate under the rotation of the worm 401, and the control of the rotating frame main body 103 is facilitated.

As shown in fig. 10, the clamping block 5 is included, the clamping block 5 is slidably connected to the inner walls of the bracket 104 and the transport rack main body 103, the back of the bracket 104 is provided with a clamping groove 502, the lower surface of the transport rack main body 103 is slidably connected with a pulling block 503, the pulling block 503 is fixedly connected to the lower surface of the clamping block 5, the clamping block 5 is slidably connected to the inner wall of the clamping groove 502, one side of the clamping block 5 away from the clamping groove 502 is fixedly connected with a spring 501, the spring 501 is fixedly connected to the inner wall of the transport rack main body 103, and the spring 501 is always in a compressed state, the latch 5 is engaged with the latch groove 502 by the spring 501, the latch 5 is moved by pulling the pull block 503, thereby make fixture block 5 and support 104 phase separation to make support 104 can rotate and make it receive and release, be convenient for protect the patient, and make things convenient for the patient to get off from transport frame main part 103.

The working principle is as follows: when needing to take the patient to examine, at first through promoting push handle 102 for supporting seat 1 removes under the effect of four pulleys 101, make the patient that is in transport frame main part 103 upper surface remove the detecting instrument next door, pull piece 503 through outside pulling this moment, it slides on the inner wall of transport frame main part 103 to have driven fixture block 5, compress spring 501 simultaneously, fixture block 5 and draw-in groove 502 phase separation this moment, can put down support 104 this moment, be convenient for the patient from moving on the detecting instrument on transport frame main part 103.

At this moment, the rotating wheel 407 is rotated, so that the threaded rod 405 moves, the arc-shaped limiting block 406 is driven to move, the arc-shaped limiting block 406 is separated from the worm 401, the rotating handle 404 can be rotated at the moment, the worm 401 is driven to rotate, the worm wheel 402 meshed with the worm can be driven to rotate, and the third rotating shaft 211 is driven to rotate along with the rotation of the worm wheel 402.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.