CN112022584A

CN112022584A - General tray of patient postoperative care

Info

Publication number: CN112022584A
Application number: CN202011133003.4A
Authority: CN
Inventors: 顿兰兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2020-12-04

Abstract

The invention discloses a general tray for postoperative care of patients, and relates to the field of care equipment. This general tray of patient's postoperative care, two sets of one side fixedly connected with adjusting part that move the seat relative, the upper surface of sliding seat is fixedly connected with first threaded rod and second threaded rod respectively, the top activity joint of first threaded rod and second threaded rod has the rotation tray. This general tray of patient's postoperative care, through with snap ring follow connecting block side roll-off, then rotate the second threaded rod to the horizontality, then pass the second threaded rod from nursing bed, then rotate the second threaded rod to vertical state and activity joint in the inside of connecting block, the screw ring rotates this moment, make first hollow tube and second hollow tube remove downwards on the top of first threaded rod and second threaded rod, make the highly suitable of rotating the tray, the convenient nursing bed to different widths uses simultaneously, conveniently carry out wound clearance and dressing change to the patient, avoid polluting nursing bed.

Description

General tray of patient postoperative care

Technical Field

The invention relates to the technical field of nursing equipment, in particular to a general tray for postoperative nursing of a patient.

Background

Nowadays, with the development of medical technology, many diseases can be cured through operations, and now many hospitals also have nursing wards, make things convenient for the patient to carry out the observation of being in hospital before the operation to some emergency, especially after the operation, need to look over patient's operation condition continuously, the patient still need to carry out some dressing changes and wound nursing this moment, consequently often need use the nursing tray.

And its main effect of present nursing tray is exactly that the transport that is used for the nurse to carry out medicine and some medical supplies expendable, article such as gauze that replace some patient simultaneously deposit temporarily, but all carry out handheld removal through the nurse basically, its capacity is less, it is very inconvenient to use when removing more article, need the nurse to reciprocate to make a round trip many times, when carrying out some wound treatment to the patient simultaneously, generally all directly place on the sick bed, can not be fine support patient wound, make some medicines and oozing the blood flow to the sick bed on easily, cause the pollution, consequently, need provide a general tray of patient postoperative care in order to solve above-mentioned problem.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a general tray for postoperative care of patients, 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 general tray for postoperative care of patients comprises two groups of sliding seats, wherein two groups of sliding seats are fixedly connected with adjusting components on one opposite side of each sliding seat, one group of sliding seats are fixedly connected with a first threaded rod, the other group of sliding seats are movably hinged with a second threaded rod, the outer surface of the top end of the first threaded rod is in threaded connection with a first hollow tube, the outer surface of the top end of the second threaded rod is in threaded connection with a second hollow tube, the outer surface of the first hollow tube is rotatably connected with an article box, connecting blocks are arranged at the top ends of the first hollow tube and the second hollow tube, an inserting rod is arranged on one opposite side of each connecting block, a rotating tray is movably clamped at one end, far away from the connecting blocks, of the inserting rod, a metal disc is arranged on the upper surface of the rotating tray, clamping components are movably clamped on the upper surface of the rotating tray and on two sides, located on the, the bottom end of the clamping component extends into the rotating tray and is movably clamped with the inserted rod;

the adjusting assembly comprises threaded sleeves, a forward rotation lead screw, a reverse rotation lead screw and a rotary table, the number of the threaded sleeves is two, the two sets of threaded sleeves are connected with the forward rotation lead screw and the reverse rotation lead screw in a threaded mode respectively in the opposite ends, the opposite ends of the forward rotation lead screw and the reverse rotation lead screw are fixedly connected, and the rotary table is fixedly sleeved on the outer surface of the joint of the forward rotation lead screw and the reverse rotation lead screw.

Preferably, the opposite ends of the threaded sleeves are respectively and fixedly connected to the side surfaces of the two groups of sliding seats, and the thread grooves on the outer surfaces of the forward rotation screw rod and the reverse rotation screw rod are opposite in direction.

Preferably, the bottom ends of the first hollow tube and the second hollow tube are rotatably connected with threaded rings, and the top ends of the first threaded rod and the second threaded rod are respectively in threaded connection with the two groups of threaded rings.

Preferably, the surface of first hollow tube has been seted up and has been rotated the groove, article case's side fixedly connected with rotates the seat, it rotates the inside of connecting in rotating the groove to rotate the seat, the surface activity joint that rotates the seat has fixed subassembly, fixed subassembly extends to the inside and the first hollow tube activity joint that rotate the seat.

Preferably, the fixed subassembly includes slider, kelly, fixed sleeve and first spring, slider fixed connection is in the surface of kelly, the one end surface at the kelly is cup jointed in the fixed sleeve activity, first spring activity joint is in fixed sleeve's inside.

Preferably, a through hole is formed in the inner wall of the rotating groove, one end, far away from the fixing sleeve, of the clamping rod is movably clamped in the through hole, a sliding groove is formed in the outer surface of the rotating seat, and the sliding block is connected in the sliding groove in a sliding mode.

Preferably, the top fixedly connected with snap ring of second hollow tube, snap ring activity joint is in the inside of connecting block, the upper surface of snap ring is equipped with fixing bolt, fixing bolt's bottom through connection piece and threaded connection are in the inside of snap ring.

Preferably, a sliding sleeve is movably sleeved on the outer surface of one end, close to the connecting block, of the inserted bar, the sliding sleeve is fixedly connected to the side face of the connecting block, the inserted bar is close to one side fixedly connected with clamping plate of the rotating tray, fixing grooves matched with the clamping plate are formed in the two sides of the rotating tray, fixing holes are formed in the inner side wall of the fixing grooves, one side fixedly connected with fixing heads of the inserted bar are far away from the clamping plate, and the fixing heads are movably clamped inside the fixing holes.

Preferably, the joint subassembly includes connecting strip, dead lever, second spring and fender ring, the quantity of dead lever is two sets of and difference fixed connection at the both ends lower surface of connecting strip, the surface at the dead lever is cup jointed in the second spring activity, keep off the fixed below that cup joints at the surface of dead lever and is located the second spring of ring, the bottom of dead lever extends to the inside of fixed orifices and the activity is pegged graft at the upper surface of fixed head.

Preferably, the inner bottom of the rotating tray is fixedly connected with a magnetic sheet, and the magnetic sheet is fixedly adsorbed with the metal disc.

The invention provides a general tray for postoperative care of patients, which has the following beneficial effects:

1. the universal tray for postoperative care of patients is characterized in that a turntable is rotated to enable a positive rotation screw rod and a negative rotation screw rod to synchronously rotate, the distance between two groups of sliding seats is increased to be larger than the width of a care bed, then a fixing bolt is upwards spirally moved to enable the bottom end of the fixing bolt to be moved out of the interior of a clamping ring, then the clamping ring slides out from the side face of a connecting block, at the moment, a second threaded rod is rotated to enable the bottom end of the second threaded rod to rotate to be in a horizontal state on the upper surface of the sliding seat, then the second threaded rod penetrates through the care bed, then the second threaded rod is rotated to be in a vertical state and enables the clamping ring to be movably clamped in the connecting block again, at the moment, the rotating tray is positioned above the care bed, then a threaded ring is rotated to enable a first hollow pipe and a second hollow pipe to downwards move at the top ends of the first threaded rod, simultaneously, the nursing bed with different widths is convenient to use, the wound of a patient is convenient to clean and change dressings, and the nursing bed is prevented from being polluted.

2. This general tray of patient postoperative care, place the inside at the article case through the consumables with some medicines and some medical care usefulness, then rotate the article case to being in under the rotation tray and then fixing through fixed subassembly, then remove the device to appointed ward position through the sliding seat by the nursing staff, when using to rotate the tray and nurse the patient, move the slider to the one end of keeping away from first hollow tube at the rotation seat surface, make the tip of kelly shift out from first hollow tube is inside, simultaneously with first spring compression, then will rotate the seat and rotate 180 degrees, make the article case outwards, then loosen the slider, this moment the kelly is spacing fixed to the article case, conveniently store simultaneously and carry more nursing materials, the convenience is being taken when nursing simultaneously.

3. The general tray for postoperative care of patients is characterized in that upper limbs or lower limbs of patients needing dressing change or wound treatment are placed on the upper surface of a metal tray, then wounds of the patients are treated through articles in an article box, after the treatment is finished, limbs of the patients are moved away from the metal tray, then the metal tray is taken down from a rotating tray for cleaning, then a connecting strip is pulled upwards, the bottom end of a fixing rod is taken out from the upper part of a fixing head, a clamping plate is taken out from the inside of a fixing groove, then the rotating tray is turned for 180 degrees, the lower surface of the rotating tray faces upwards, the fixing head is inserted into a fixing hole and is clamped and fixed through the fixing rod, at the moment, the limbs of the patients can be placed on the rotating tray for nursing massage, pollution to a nursing bed when the wounds are treated is effectively avoided, and the limbs of the patients can be supported through the device, the nursing massage is convenient.

Drawings

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

FIG. 2 is a schematic view of the external surface structure of a second hollow tube of the present invention;

FIG. 3 is a schematic view of the outer surface configuration of a first hollow tube of the present invention;

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

FIG. 5 is a schematic view of the adjusting assembly of the present invention;

FIG. 6 is a schematic view of the outer surface structure of the rotating tray of the present invention;

FIG. 7 is a schematic view of a latch assembly of the present invention.

In the figure: 1. a sliding seat; 2. an adjustment assembly; 201. a threaded sleeve; 202. a positive rotation screw rod; 203. reversing the screw rod; 204. a turntable; 3. a first threaded rod; 4. a second threaded rod; 5. a second hollow tube; 6. a first hollow tube; 7. rotating the tray; 8. an article box; 9. connecting blocks; 10. fixing the bolt; 11. a sliding sleeve; 12. inserting a rod; 13. clamping a plate; 14. a fixed head; 15. a snap ring; 16. a rotating groove; 17. a rotating seat; 18. a fixing assembly; 181. a slider; 182. a clamping rod; 183. fixing the sleeve; 184. a first spring; 19. a metal disc; 20. a magnetic sheet; 21. fixing grooves; 22. a fixing hole; 23. a clamping assembly; 231. a connecting strip; 232. fixing the rod; 233. a second spring; 234. and (4) a baffle ring.

Detailed Description

The embodiment of the invention provides a general tray for postoperative care of a patient, which comprises two groups of sliding seats 1, wherein the number of the sliding seats 1 is two, one opposite side of the two groups of sliding seats 1 is fixedly connected with an adjusting component 2, the upper surface of one group of sliding seats 1 is fixedly connected with a first threaded rod 3, the upper surface of the other group of sliding seats 1 is movably hinged with a second threaded rod 4, the outer surface of the top end of the first threaded rod 3 is in threaded connection with a first hollow pipe 6, the outer surface of the top end of the second threaded rod 4 is in threaded connection with a second hollow pipe 5, the outer surface of the first hollow pipe 6 is rotatably connected with an article box 8, the top ends of the first hollow pipe 6 and the second hollow pipe 5 are respectively provided with a connecting block 9, one opposite side of the connecting block 9 is provided with an inserting rod 12, one end of the inserting rod 12, which is far away from the connecting block 9, the magnetic sheet 20 is fixedly connected to the inner bottom of the rotating tray 7, the magnetic sheet 20 and the metal disc 19 are fixedly adsorbed, the clamping components 23 are movably clamped on the upper surface of the rotating tray 7 and positioned on two sides of the metal disc 19, and the bottom ends of the clamping components 23 extend into the rotating tray 7 and are movably clamped with the inserted link 12;

more specifically, the adjusting assembly 2 comprises a threaded sleeve 201, a forward rotation lead screw 202, a reverse rotation lead screw 203 and a rotary table 204, the number of the threaded sleeve 201 is two, the opposite ends of the two sets of threaded sleeves 201 are respectively and internally connected with the forward rotation lead screw 202 and the reverse rotation lead screw 203 in a threaded manner, the opposite ends of the forward rotation lead screw 202 and the reverse rotation lead screw 203 are fixedly connected, the rotary table 204 is fixedly sleeved on the outer surface of the joint of the forward rotation lead screw 202 and the reverse rotation lead screw 203, the opposite ends of the threaded sleeve 201 are respectively and fixedly connected to the side surfaces of the two sets of sliding seats 1, the thread grooves on the outer surfaces of the forward rotation lead screw 202 and the reverse rotation lead screw 203 are opposite in, because the thread grooves on the outer surfaces of the forward rotation screw rod 202 and the reverse rotation screw rod 203 are opposite in direction, the two groups of thread sleeves 201 move towards the opposite ends at the moment, so that the distance between the two groups of sliding seats 1 is increased to be larger than the width of the nursing bed.

Further, the bottom of first hollow tube 6 and second hollow tube 5 is all rotated and is connected with the screw ring, the top of first threaded rod 3 and second threaded rod 4 respectively with two sets of screw ring threaded connection, rotation groove 16 has been seted up to the surface of first hollow tube 6, article box 8's side fixedly connected with rotates seat 17, it rotates the inside of connecting in rotation groove 16 to rotate seat 17, the surface activity joint that rotates seat 17 has fixed subassembly 18, fixed subassembly 18 extends to the inside and the 6 activity joints of first hollow tube that rotate seat 17.

More specifically, the fixing assembly 18 includes a sliding block 181, a clamping rod 182, a fixing sleeve 183 and a first spring 184, the sliding block 181 is fixedly connected to the outer surface of the clamping rod 182, the fixing sleeve 183 is movably sleeved on the outer surface of one end of the clamping rod 182, the first spring 184 is movably clamped inside the fixing sleeve 183, a through hole is formed in the inner wall of the rotating groove 16, one end of the clamping rod 182, which is far away from the fixing sleeve 183, is movably clamped inside the through hole, a sliding groove is formed in the outer surface of the rotating seat 17, the sliding block 181 is slidably connected inside the sliding groove, the sliding block 181 is moved to one end, which is far away from the first hollow tube 6, on the outer surface, so that the end of the catch lever 182 is moved out of the interior of the first hollow tube 6, while compressing the first spring 184, then the rotating seat 17 is rotated 180 degrees to make the article box 8 face outwards, then the sliding block 181 is released, and at the moment, the clamping rod 182 enters the other end of the through hole under the action of the first spring 184 to be limited and fixed.

Further, a snap ring 15 is fixedly connected to the top end of the second hollow tube 5, the snap ring 15 is movably clamped inside the connecting block 9, a fixing bolt 10 is arranged on the upper surface of the snap ring 15, the bottom end of the fixing bolt 10 penetrates through the connecting block 9 and is in threaded connection with the inside of the snap ring 15, a sliding sleeve 11 is movably sleeved on the outer surface of one end, close to the connecting block 9, of the inserted rod 12, the sliding sleeve 11 is fixedly connected to the side surface of the connecting block 9, a clamping plate 13 is fixedly connected to one side, close to the rotating tray 7, of the inserted rod 12, fixing grooves 21 matched with the clamping plate 13 are formed in both sides of the rotating tray 7, fixing holes 22 are formed in the inner side wall of the fixing grooves 21, fixing heads 14 are fixedly connected to one side, far away from the inserted rod 12, of the fixing heads 14 are movably clamped inside the fixing holes 22, the clamping assembly 23 comprises connecting strips 231, fixing rods 232, second springs 233 and baffle rings, the second spring 233 is movably sleeved on the outer surface of the fixing rod 232, the baffle ring 234 is fixedly sleeved on the outer surface of the fixing rod 232 and located below the second spring 233, the bottom end of the fixing rod 232 extends to the inside of the fixing hole 22 and is movably inserted into the upper surface of the fixing head 14, the connecting strip 231 is pulled upwards, the bottom end of the fixing rod 232 is taken out from the upper side of the fixing head 14, the clamping plate 13 is taken out from the inside of the fixing groove 21, the rotating tray 7 is turned over for 180 degrees, the lower surface of the rotating tray 7 faces upwards, the fixing head 14 is inserted into the inside of the fixing hole 22 and is clamped and fixed through the fixing rod 232, and at the moment, the limbs of a patient can be placed on the rotating tray 7 for nursing and massage.

The working principle is as follows: the invention discloses a general tray for postoperative care of a patient, which is characterized in that when the tray is used, a plurality of medicines and a plurality of consumables for medical care are placed in an article box 8, then the article box 8 is rotated to be positioned under a rotating tray 7 and then is fixed by a fixing component 18, then a nursing staff moves the tray to a designated ward position through a sliding seat 1, then the patient is nursed, when the upper limb or the lower limb of the patient needs wound treatment or dressing change, a rotating disc 204 is rotated firstly, a forward rotation screw rod 202 and a reverse rotation screw rod 203 synchronously rotate, as the directions of thread grooves on the outer surfaces of the forward rotation screw rod 202 and the reverse rotation screw rod 203 are opposite, at the moment, two groups of thread sleeves 201 move towards the opposite ends, the distance between the two groups of sliding seats 1 is increased to be larger than the width of a nursing bed, an inserted rod 12 at the top end moves outwards from the inside of the sliding sleeve 11 in the process, then, the fixing bolt 10 is moved upwards in a spiral way, so that the bottom end of the fixing bolt 10 is moved out of the interior of the clamping ring 15, then the clamping ring 15 is slid out from the side surface of the connecting block 9, at the moment, the second threaded rod 4 is rotated, so that the bottom end of the second threaded rod 4 is rotated to be in a horizontal state on the upper surface of the sliding seat 1, then the second threaded rod 4 passes through the nursing bed, then the second threaded rod 4 is rotated to be in a vertical state, so that the clamping ring 15 is clamped in the connecting block 9 again, at the moment, the rotating tray 7 is positioned above the nursing bed, then the sliding block 181 is moved towards one end, far away from the first hollow tube 6, on the outer surface of the rotating seat 17, so that the end part of the clamping rod 182 is moved out of the interior of the first hollow tube 6, at the same time, the first spring 184 is compressed, then the rotating seat 17 is rotated 180 degrees, so that the article box 8 faces outwards, then the sliding block 181, at this time, the threaded rings are rotated to make the first hollow tube 6 and the second hollow tube 5 move downwards at the top ends of the first threaded rod 3 and the second threaded rod 4, and finally make the height of the rotating tray 7 suitable for use, then the upper limb or the lower limb of the patient needing dressing change or wound treatment is placed on the upper surface of the metal plate 19, then the wound of the patient is treated through the articles in the article box 8, after the treatment is finished, the limb of the patient is removed from the metal plate 19, then the metal plate 19 is taken down from the rotating tray 7, cleaning is carried out, then the connecting strip 231 is pulled upwards to make the bottom end of the fixing rod 232 taken out from the upper part of the fixing head 14, then the clamping plate 13 is taken out from the inside of the fixing groove 21, then the rotating tray 7 is turned over by 180 degrees to make the lower surface of the rotating tray 7 face upwards, then the fixing head 14 is inserted into the fixing hole 22, and is clamped and fixed by a fixing rod 232, and the limbs of the patient can be placed on the rotating tray 7 for nursing and massage.

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.

Claims

1. The utility model provides a general tray of patient postoperative care, includes sliding seat (1), its characterized in that: the quantity of sliding seat (1) is two sets of, two sets of one side fixedly connected with adjusting part (2) that sliding seat (1) is relative, a set of the last fixed surface of sliding seat (1) is connected with first threaded rod (3), another group the last surface activity of sliding seat (1) articulates there is second threaded rod (4), the surface screw thread connection in top of first threaded rod (3) has first hollow tube (6), the surface screw thread connection in top of second threaded rod (4) has second hollow tube (5), the surface rotation of first hollow tube (6) is connected with article case (8), first hollow tube (6) and second hollow tube (5) top all are equipped with connecting block (9), the one side that connecting block (9) is relative is equipped with inserted bar (12), the one end activity joint that connecting block (9) was kept away from to inserted bar (12) has rotation tray (7), a metal disc (19) is arranged on the upper surface of the rotating tray (7), clamping components (23) are movably clamped on the upper surface of the rotating tray (7) and positioned on two sides of the metal disc (19), and the bottom end of each clamping component (23) extends to the inside of the rotating tray (7) and is movably clamped with the insertion rod (12);

the adjusting assembly (2) comprises threaded sleeves (201), a positive rotation screw rod (202), a reverse rotation screw rod (203) and a rotary table (204), the number of the threaded sleeves (201) is two, the two sets of the opposite ends of the threaded sleeves (201) are internally and respectively in threaded connection with the positive rotation screw rod (202) and the reverse rotation screw rod (203), the opposite ends of the positive rotation screw rod (202) and the reverse rotation screw rod (203) are fixedly connected, and the rotary table (204) is fixedly sleeved on the outer surface of the joint of the positive rotation screw rod (202) and the reverse rotation screw rod (203).

2. The universal tray for post-operative care of patients as claimed in claim 1, wherein: one end, back to the back, of the threaded sleeve (201) is fixedly connected to the side faces of the two groups of sliding seats (1) respectively, and the thread grooves in the outer surfaces of the forward rotation screw rod (202) and the reverse rotation screw rod (203) are opposite in direction.

3. The universal tray for post-operative care of patients as claimed in claim 1, wherein: the bottom of first hollow tube (6) and second hollow tube (5) all rotates and is connected with the screw ring, the top of first threaded rod (3) and second threaded rod (4) respectively with two sets of screw ring threaded connection.

4. The universal tray for post-operative care of patients as claimed in claim 1, wherein: the surface of first hollow tube (6) has been seted up and has been rotated groove (16), the side fixedly connected with of article case (8) rotates seat (17), rotate seat (17) and rotate the inside of connecting in rotation groove (16), the surface activity joint that rotates seat (17) has fixed subassembly (18), fixed subassembly (18) extend to the inside and the first hollow tube (6) activity joint that rotate seat (17).

5. The universal tray for post-operative care of patients as claimed in claim 4, wherein: fixed subassembly (18) include slider (181), kelly (182), fixed sleeve (183) and first spring (184), slider (181) fixed connection is in the surface of kelly (182), the one end surface at kelly (182) is cup jointed in fixed sleeve (183) activity, first spring (184) activity joint is in the inside of fixed sleeve (183).

6. The universal tray for post-operative care of patients as claimed in claim 5, wherein: the inner wall of the rotating groove (16) is provided with a through hole, one end, far away from the fixed sleeve (183), of the clamping rod (182) is movably clamped inside the through hole, the outer surface of the rotating seat (17) is provided with a sliding groove, and the sliding block (181) is connected inside the sliding groove in a sliding mode.

7. The universal tray for post-operative care of patients as claimed in claim 1, wherein: the top fixedly connected with snap ring (15) of second hollow tube (5), snap ring (15) activity joint is in the inside of connecting block (9), the upper surface of snap ring (15) is equipped with fixing bolt (10), the bottom through connection piece (9) and the inside of threaded connection at snap ring (15) of fixing bolt (10).

8. The universal tray for post-operative care of patients as claimed in claim 1, wherein: sliding sleeve (11) have been cup jointed in the activity of the one end surface that inserted bar (12) is close to connecting block (9), sliding sleeve (11) fixed connection is in the side of connecting block (9), inserted bar (12) are close to one side fixedly connected with cardboard (13) that rotate tray (7), fixed slot (21) with cardboard (13) looks adaptation are all seted up to the both sides of rotating tray (7), fixed orifices (22) have been seted up on the inside wall of fixed slot (21), one side fixedly connected with fixed head (14) of inserted bar (12) are kept away from in cardboard (13), fixed head (14) activity joint is in the inside of fixed orifices (22).

9. The universal tray for post-operative care of patients as claimed in claim 8, wherein: clamping subassembly (23) is including connecting strip (231), dead lever (232), second spring (233) and fender ring (234), the quantity of dead lever (232) is two sets of and respectively fixed connection at the both ends lower surface of connecting strip (231), the surface at dead lever (232) is cup jointed in second spring (233) activity, keep off ring (234) fixed cup joint in the surface of dead lever (232) and be located the below of second spring (233), the bottom of dead lever (232) extends to the inside of fixed orifices (22) and the activity is pegged graft at the upper surface of fixed head (14).

10. The universal tray for post-operative care of patients as claimed in claim 1, wherein: the inner bottom of the rotary tray (7) is fixedly connected with a magnetic sheet (20), and the magnetic sheet (20) is fixedly adsorbed with the metal disc (19).