CN214207982U - Protective tableware capable of preventing cross infection of catering - Google Patents

Abstract

The utility model discloses a protective tableware capable of preventing cross infection of catering, which comprises a tableware cover and a chopstick body, wherein the top of the tableware cover is provided with an opening, the opening is provided with a closing mechanism, and the closing mechanism is provided with a driving mechanism for driving the closing mechanism to close and open the opening; the side wall of the tableware cover is provided with a plurality of sensors connected with the driving mechanism; the chopstick body is provided with a trigger piece for triggering the sensor, and when the sensor is triggered by the trigger piece, the driving mechanism drives the closing mechanism to open the opening in a folding mode. The utility model aims to provide a protective tableware which can prevent cross infection of catering; can make the diners use the public chopsticks to pick up food.

Description

Protective tableware capable of preventing cross infection of catering

Technical Field

The utility model relates to the technical field of food tableware, in particular to a protective tableware capable of preventing cross infection of catering.

Background

At present, when a plurality of people have dinner, a pair of private chopsticks and a pair of public chopsticks with different colors are provided for each diner in a restaurant for public health, the private chopsticks are used for clamping food into an inlet, and the public chopsticks are used for clamping the food into a bowl from a dinner plate; however, many people do not have the habit of public chopsticks, the situation that people use private chopsticks to clamp dishes in the process of eating by many people cannot be avoided, and when the private chopsticks are used to clamp dishes, saliva is brought into food of the dinner plate, so that propagation of some infectious diseases is easily caused, and certain dining risks are provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a protective tableware capable of preventing cross infection of catering, which mainly solves the problem that part of diners do not use public chopsticks in the prior art.

The utility model discloses the technical scheme who adopts: a protective tableware capable of preventing cross infection of catering comprises a tableware cover and a chopstick body, wherein an opening is formed in the top of the tableware cover, a closing mechanism is arranged at the opening, and a driving mechanism for driving the closing mechanism to close and open the opening is arranged on the closing mechanism; the side wall of the tableware cover is provided with a plurality of sensors connected with the driving mechanism; the chopstick body is provided with a trigger piece for triggering the sensor, and when the sensor is triggered by the trigger piece, the driving mechanism drives the closing mechanism to open the opening in a folding mode.

Preferably, the closing mechanism comprises a first cover plate fixedly connected to the cutlery lid and a third cover plate which can be overlapped with the first cover plate and is movably arranged above the first cover plate, and the driving mechanism is used for driving the third cover plate to close the opening.

In a further preferred scheme, the tableware cover is in a circular ring shape in a top view; a second cover plate is arranged between the first cover plate and the third cover plate, the first cover plate, the second cover plate and the third cover plate are all fan-shaped in plan view, the driving mechanism is arranged at the circle center positions of the first cover plate, the second cover plate and the third cover plate, and the second cover plate and the third cover plate can rotate by taking the driving mechanism as a shaft; a first limiting assembly is arranged between the first cover plate and the second cover plate, and a second limiting assembly is arranged between the second cover plate and the third cover plate; when the driving mechanism drives the third cover plate to rotate, the third cover plate drives the second cover plate to rotate to close the opening through the second limiting assembly.

In a further preferred embodiment, the first limiting mechanism comprises a first limiting boss arranged at the top of the first cover plate and arranged along the radial direction of the first cover plate, and a second limiting boss arranged at the bottom of the second cover plate and arranged along the radial direction of the second cover plate; the first limiting boss is positioned on one side edge of the first cover plate, and the second limiting boss is positioned on the other side edge of the second cover plate; when the first limit boss is abutted to the second limit boss, the second cover plate cannot rotate continuously in the direction of closing the opening. In a further preferred embodiment, the second limiting mechanism includes a third limiting boss disposed at the top of the second cover plate and arranged along the radial direction of the second cover plate, a fourth limiting boss and a fifth limiting boss disposed at the bottom of the third cover plate and arranged along the radial direction of the third cover plate; the third limiting boss is positioned on one side edge of the second cover plate, the fifth limiting boss is positioned on one side edge of the third cover plate, and the fourth limiting boss is positioned on the other side edge of the third cover plate; when the fifth limiting boss abuts against the first limiting boss, the third cover plate cannot rotate continuously in the direction of opening the opening.

In a further preferred scheme, the driving mechanism comprises an inverted-T-shaped fixed boss, a cylindrical connecting column arranged on the first cover plate, a first planar bearing arranged between the first cover plate and the second cover plate and sleeved on the connecting column, a second planar bearing arranged between the second cover plate and the third cover plate and sleeved on the connecting column, and a driving motor fixedly connected to the third cover plate; an output shaft of the driving motor is fixedly connected in the connecting column; the upper end of the fixed boss penetrates through the first cover plate and the connecting column in sequence and then is fixedly connected with an output shaft of the driving motor through a bolt.

Preferably, the inductor comprises a shell made of a non-metal material, and a first U-shaped groove, a second U-shaped groove and an article holding groove are formed in the shell; a first U-shaped copper sheet is arranged in the first U-shaped groove, and the storage groove is positioned at the opening end of the first U-shaped copper sheet; a second U-shaped copper sheet is arranged in the second U-shaped groove, the second U-shaped copper sheet is sleeved outside the first U-shaped copper sheet, and gaps are formed between two side walls of the opening end of the first U-shaped copper sheet and two side walls of the opening end of the second U-shaped copper sheet respectively; the first U-shaped copper sheet and the second U-shaped copper sheet are electrically connected with the driving mechanism through electric wires respectively; a magnetic bead is placed in the storage groove, when the trigger piece is close to the magnetic bead, the magnetic bead presses one side wall of the first U-shaped copper sheet to one side wall of the second U-shaped copper sheet, and the first U-shaped copper sheet is conducted with the second U-shaped copper sheet. In a further preferred scheme, the bottom of the storage groove is a V-shaped groove, and two high ends of the V-shaped groove are positioned below two side walls of the opening end of the first U-shaped copper sheet; the top of the storage groove is an inverted V-shaped groove with a structure symmetrically arranged with the V-shaped groove. In a further preferred scheme, the clamping end of the chopstick body is made of a magnetic material or a magnetic conductivity material.

The utility model adopts the beneficial effect behind the above structure to do: this structural design can force the requirement personnel of having dinner to adopt public chopsticks to press from both sides the dish, is favorable to strengthening the consciousness that the personnel of having dinner used public chopsticks, reduces the risk that arouses cross infection, and food and the mobile air in the dinner plate sustained contact still can be avoided to this design simultaneously, realize keeping warm to the food in the dinner plate, the function of food cooling rate slows down to the condition emergence in the saliva fly into food when can avoiding the personnel of having dinner to chat.

Drawings

Fig. 1 is a schematic structural view of a closing mechanism closing an opening according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the closing mechanism for opening the opening in the embodiment of the present invention;

fig. 3 is an exploded view of a closure mechanism in an embodiment of the invention;

fig. 4 is an axial cross-sectional view of a drive mechanism in an embodiment of the invention;

fig. 5 is a schematic structural view of the first limiting boss and the second limiting boss abutting against each other in the embodiment of the present invention;

fig. 6 is a schematic structural view of the first limiting boss and the fifth limiting boss abutting against each other in the embodiment of the present invention;

fig. 7 is a schematic structural view of an embodiment of the present invention when the inductor housing is opened;

fig. 8 is a partial cross-sectional view of an inductor in an embodiment of the invention.

In the figure: 1-a tableware cover, 2-a chopstick body, 3-a closing mechanism, 4-a driving mechanism and 5-an inductor; 11-opening, 12-flanging; 21-a trigger; 31-a first cover plate, 32-a second cover plate, 33-a third cover plate, 34-a first limiting boss, 35-a second limiting boss, 36-a third limiting boss, 37-a fourth limiting boss, and 38-a fifth limiting boss; 41-a fixed boss, 42-a connecting column, 43-a first plane bearing, 44-a second plane bearing and 45-a driving motor; 51-shell, 52-first U-shaped copper sheet, 53-second U-shaped copper sheet, 54-storage groove, 55-magnetic bead, 56-V-shaped groove and 57-inverted V-shaped groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The protective tableware capable of preventing cross infection of catering shown in fig. 1-8 comprises a tableware cover 1 and chopstick bodies 2, wherein an opening 11 is formed in the top of the tableware cover 1, a closing mechanism 3 is arranged at the opening 11, and a driving mechanism 4 for driving the closing mechanism 3 to close and open the opening 11 is arranged on the closing mechanism 3; the side wall of the tableware cover 1 is provided with a plurality of inductors 5 connected with the driving mechanism 4; the chopstick body 2 is provided with a trigger piece 21 for triggering the inductor 5, and when the inductor 5 is triggered by the trigger piece 21, the driving mechanism 4 drives the closing mechanism 3 to open the opening 11 in a folding mode. The chopstick body 2 in the utility model is used as public chopsticks, and common plastic/wood chopsticks in the market are used as private chopsticks; the tableware cover 1 can adopt two types of structures, the first type of structure (shown as the first type of structure) is a structure which is covered outside the dinner plate and completely covers the dinner plate in the tableware cover 1, and the structure has no requirement on the shape of the tableware cover 1, so the tableware cover 1 with the structure can be made into a structure with a square, round, oval or other figures in the top view; the second type of structure is a structure that covers the top of the dinner plate, and the structure needs the shape of the tableware cover 1 to be matched with the top of the dinner plate.

During the use, will the utility model provides a 1 lids of tableware lid close on the dinner plate, when the personnel of having dinner used public chopsticks to press from both sides the dish, inductor 5 was triggered by trigger piece 21 on the public chopsticks, and signal to actuating mechanism 4 is produced, is opened opening 11 by actuating mechanism 4 drive closing mechanism 3, and the personnel of having dinner can adopt public chopsticks to press from both sides the dish, and after closing mechanism 3 opened opening 11 certain time, closing mechanism 3 recloses opening 11. When using private chopsticks to press from both sides the dish, inductor 5 can't be triggered, and opening 11 can not be opened to closing mechanism 3, consequently this design can force the requirement diner to adopt public chopsticks to press from both sides the dish, is favorable to strengthening the consciousness that diner used public chopsticks, reduces the risk that arouses cross infection, and this design still can keep warm to the food in the dinner plate simultaneously, slows down the refrigerated speed of food to the condition emergence in the saliva foam fly into food when can avoiding diner to chat.

Preferably, the closing mechanism 3 comprises a first cover plate 31 fixedly connected to the cutlery lid 1 and a third cover plate 33 which can be overlapped with the first cover plate 31, the third cover plate 33 is movably arranged above the first cover plate 31, and the driving mechanism 4 is used for driving the third cover plate 33 to close the opening 11. In the structure of this embodiment, the first cover plate 31 blocks a part of the opening 11, and the third cover plate 33 can close the opening 11 by sliding in parallel or rotating in a closed manner under the drive of the drive mechanism 4.

In a further preferred embodiment, the tableware lid 1 has a circular ring shape in a top view; a second cover plate 32 is arranged between the first cover plate 31 and the third cover plate 33, the first cover plate 31, the second cover plate 32 and the third cover plate 33 are all fan-shaped in plan view, the driving mechanism 4 is arranged at the circle center positions of the first cover plate 31, the second cover plate 32 and the third cover plate 33, and the second cover plate 32 and the third cover plate 33 can rotate by taking the driving mechanism 4 as an axis; a first limiting component is arranged between the first cover plate 31 and the second cover plate 32, and a second limiting component is arranged between the second cover plate 32 and the third cover plate 33; when the driving mechanism 4 drives the third cover plate 33 to rotate, the third cover plate 33 drives the second cover plate 32 to rotate to close the opening 11 through the second limiting component; in the structure of the scheme, the driving mechanism 4 can drive the third cover plate 33 to rotate, the third cover plate 33 drives the second cover plate 32 to move through the second limiting component, and finally the third cover plate 33 and the second cover plate 32 close the opening 11; this structure compares with the structure that only has first apron 31, third apron 33 alone, and this structure is littleer to opening 11's the area that shelters from to set up actuating mechanism 4 in the design of three apron central point and put, make three apron folding back can not surpass tableware lid 1 outside, and the structure is more reasonable, and when three apron is folding, angle after folding is about 130, and the angle that the opening does not shelter from is about 230, can use on big round table more the adaptation. In a further preferred embodiment, step-shaped grooves matched with the first cover plate 31, the second cover plate 32 and the third cover plate 33 may be formed in the top of the tableware cover 1, so as to facilitate installation of the first cover plate 31 and shielding of edges of the second cover plate 32 and the third cover plate 33, and improve overall aesthetic appearance.

In a further preferred embodiment, the first limiting mechanism includes a first limiting boss 34 disposed on the top of the first cover plate 31 and arranged along the radial direction of the first cover plate 31, and a second limiting boss 35 disposed on the bottom of the second cover plate 32 and arranged along the radial direction of the second cover plate 32; the first limit boss 34 is located on one side of the first cover plate 31, and the second limit boss 35 is located on the other side of the second cover plate 32; when the first limit boss 34 abuts against the second limit boss 35, the second cover plate 32 cannot rotate continuously in the direction of closing the opening 11; the limiting structure has simple and effective limiting function, can be produced by a manufacturer conveniently, and is favorable for reducing the production cost.

In a further preferred embodiment, the second limiting mechanism includes a third limiting boss 36 disposed on the top of the second cover plate 32 and arranged along the radial direction of the second cover plate 32, a fourth limiting boss 37 and a fifth limiting boss 38 disposed on the bottom of the third cover plate 33 and arranged along the radial direction of the third cover plate 33; the third limiting boss 36 is located at one side of the second cover plate 32, the fifth limiting boss 38 is located at one side of the third cover plate 33, and the fourth limiting boss 37 is located at the other side of the third cover plate 33; when the fifth limit boss 38 abuts against the first limit boss 34, the third cover plate 33 cannot rotate continuously in the direction of opening the opening 11; the limiting structure has simple and effective limiting function, can be produced by a manufacturer conveniently, and is favorable for reducing the production cost.

In a further preferred embodiment, the driving mechanism 4 includes an inverted T-shaped fixing boss 41, a connecting column 42 which is arranged on the first cover plate 31 and is cylindrical, a first planar bearing 43 which is arranged between the first cover plate 31 and the second cover plate 32 and is sleeved on the connecting column 42, a second planar bearing 44 which is arranged between the second cover plate 32 and the third cover plate 33 and is sleeved on the connecting column 42, and a driving motor 45 which is fixedly connected to the third cover plate 33; an output shaft of the driving motor 45 is fixedly connected in the connecting column 42; the upper end of the fixed boss 41 passes through the first cover plate 31 and the connecting column 42 in sequence and then is fixedly connected with an output shaft of the driving motor 45 through bolts, and through the matching of the two plane bearings, the fluency of each cover plate in the rotating process can be improved, the wear rate of each cover plate is reduced, and the service life of the tableware is finally prolonged. Grooves for placing plane bearings can be machined on the back surfaces of the second cover plate 32 and the third cover plate 33, so that the overlapping thickness of the three cover plates can be reduced; the fixing boss 41 may be integrally formed with the first cover plate 31 or fixedly coupled together by bolts. In order to improve the accuracy of the rotation angle of each cover plate, travel switches can be installed on the first cover plate 31 and the second cover plate 32, the first limit component and the second limit component trigger corresponding travel switches, and after triggering, the travel switches send out induction signals to the control circuit so that the control circuit controls the driving motor 45 to stop rotating; of course, the drive motor 45 may be controlled by sensing the torque of the drive motor 45. In order to facilitate the washing of the dish lids by the attendant, the driving motor 45 may be covered with a waterproof motor or with a cover seal. The motor driving circuit board of the driving motor 45 can be mounted on the top of the third cover plate 33 by adopting an external or directly additionally mounted sealing cover, the driving motor and the inductor 5 are electrically connected to the motor driving circuit board, and the motor driving circuit board is also connected with a timer, a main switch and a lithium battery; the sealed cover can avoid the influence of water inflow of all electronic elements on use, and the tableware can be taken and used at any time without being connected with a socket for use due to the arrangement of the lithium battery. The motor driving circuit board can directly adopt a conventional motor driving circuit board in the prior art, such as a motor driving module with a chip of BTS7970 or L298. The joint of the third cover plate 33 and the driving motor 45 can be provided with a waterproof ring in the prior art for waterproofing.

In a further preferable scheme, each cover plate is made of antifogging glass or other food-grade transparent materials, and the tableware cover 1 can be made of aluminum alloy or plastic materials or food-grade transparent materials or the combination of the materials; the food grade transparent material is pp plastic material; the purpose of arranging the cover plates as the anti-fog glass is to ensure that diners can check the food state in the dinner plate through the cover plates when the tableware cover 1 is closed on the dinner plate, and the anti-fog glass can avoid the occurrence of the condition that the vision is influenced by water drops, water mist and the like generated on the cover plates; of course, other opaque materials may be used by the manufacturer in order to reduce the cost of producing each cover plate.

Preferably, the inductor 5 includes a housing 51 made of a non-metal material, and a first U-shaped groove, a second U-shaped groove and a storage groove 54 are provided in the housing 51; a first U-shaped copper sheet 52 is arranged in the first U-shaped groove, and the article holding groove 54 is positioned at the opening 11 end of the first U-shaped copper sheet 52; a second U-shaped copper sheet 53 is arranged in the second U-shaped groove, the second U-shaped copper sheet 53 is sleeved outside the first U-shaped copper sheet 52, and gaps are formed between two side walls of the opening 11 end of the first U-shaped copper sheet 52 and two side walls of the opening 11 end of the second U-shaped copper sheet 53 respectively; the first U-shaped copper sheet 52 and the second U-shaped copper sheet 53 are respectively electrically connected with the driving mechanism 4 through electric wires; a magnetic bead 55 is placed in the storage groove 54, and when the trigger 21 is close to the magnetic bead 55, the magnetic bead 55 presses one side wall of the first U-shaped copper sheet 52 against one side wall of the second U-shaped copper sheet 53, so that the first U-shaped copper sheet 52 is conducted with the second U-shaped copper sheet 53. The sensor 5 is structurally designed so that the diner only needs to bring the public chopsticks close to the corresponding areas, the magnetic beads 55 are driven to move, and the magnetic beads 55 press one side wall of the first U-shaped copper sheet 52 to one side wall corresponding to the second U-shaped copper sheet 53, so as to send a signal to the control circuit; this inductor 5's principle is the same with dabbing the switch principle, but the design of this structure can more adapt the in-service use, and the purpose that sets up magnetic bead 55 in inductor 5 is because public chopsticks can often be heated in the use, if set up the condition that magnet degaussing then appears easily in public chopsticks, the influence is used, and the adoption is changed inductor 5 into all kinds of electronic sensor's the case, and cost and operation requirement are too high again, for this reason the utility model discloses new structural design has been carried out inductor 5.

In a further preferable scheme, the bottom of the storage groove 54 is a V-shaped groove 56, and two high-position ends of the V-shaped groove 56 are located below two side walls of the opening 11 end of the first U-shaped copper sheet 52; the groove top of the object placing groove 54 is an inverted V-shaped groove 57 symmetrically arranged with the V-shaped groove 56 in structure, so that the magnetic beads 55 can be placed in the V-shaped groove 56 when being useless, the error touch is avoided, the design of the inverted V-shaped groove 57 enables the inductor 5 to be normally used in the forward and reverse installation, and the inductor is convenient for manufacturers to install. In a further preferred embodiment, the holding end of the chopstick body 2 is made of a magnetic material or a magnetic conductive material, or the trigger 21 may be configured as an iron column, and then wrapped with a plastic material to finally form the chopstick body 2.

In a further preferable scheme, the top of the tableware cover 1 is provided with a flanging 12 which is turned outwards, and the inductor 5 is arranged in the flanging; the inductor 5 cannot be exposed due to the structural design, and the electric wire of the inductor 5 can be hidden in the flanging, so that the overall attractiveness of the equipment is improved.

In order to facilitate understanding of the working principle of the present invention, the following description of the present invention will be made in conjunction with all the preferred embodiments.

When in use, a waiter closes the tableware cover 1 on the dinner plate and opens the main switch, when the diners use the public chopsticks to pick up food, the magnetic beads 55 in the inductor 5 are attracted by the iron posts on the public chopsticks, so that one side wall of the first U-shaped copper sheet 52 is attached to one side wall of the second U-shaped copper sheet 53, the generated electrical signal is sent to the motor driving circuit board, the motor driving circuit board controls the driving motor 45 to drive the third cover plate 33 to rotate, the third cover plate 33 drives the second cover plate 32 to rotate when rotating to a certain angle, thereby opening the opening 11, stopping the rotation of the driving motor 45 when the third cover plate 33 and the second cover plate 32 rotate to the designated position, meanwhile, the timer starts to time, and after the preset seconds, the timer sends a signal to the motor driving circuit board, and the motor driving circuit board controls the driving motor 45 to rotate reversely until the third cover plate 33 and the second cover plate 32 close the opening 11; during the closing of the third cover 33 and the second cover 32, if the sensor 5 is sensed again, the driving motor 45 controls the opening 11 of the third cover 33 and the second cover 32 again, and the timer is reset.

The above embodiment is the preferred embodiment of the present invention, which is only used to facilitate the explanation of the present invention, it is not right to the present invention, which makes the restriction on any form, and any person who knows commonly in the technical field can use the present invention to make the equivalent embodiment of local change or modification without departing from the technical features of the present invention.

Claims (9)

1. The utility model provides a can prevent protection tableware of food and beverage cross infection, includes tableware lid (1) and chopsticks body (2), its characterized in that: an opening (11) is formed in the top of the tableware cover (1), a closing mechanism (3) is arranged at the opening (11), and a driving mechanism (4) for driving the closing mechanism (3) to close and open the opening (11) is arranged on the closing mechanism (3); the side wall of the tableware cover (1) is provided with a plurality of inductors (5) connected with the driving mechanism (4); the chopstick body (2) is provided with a trigger piece (21) for triggering the inductor (5), and when the inductor (5) is triggered by the trigger piece (21), the driving mechanism (4) drives the closing mechanism (3) to open the opening (11) in a folding mode.

2. The protective tableware for preventing cross infection of catering according to claim 1, wherein: the closing mechanism (3) comprises a first cover plate (31) fixedly connected to the tableware cover (1) and a third cover plate (33) capable of being overlapped with the first cover plate (31), the third cover plate (33) is movably arranged above the first cover plate (31), and the driving mechanism (4) is used for driving the third cover plate (33) to close the opening (11).

3. The protective tableware for preventing cross infection of catering according to claim 2, wherein: the tableware cover (1) is in a circular ring shape in the top view; a second cover plate (32) is arranged between the first cover plate (31) and the third cover plate (33), the first cover plate (31), the second cover plate (32) and the third cover plate (33) are fan-shaped in plan view, the driving mechanism (4) is arranged at the circle center positions of the first cover plate (31), the second cover plate (32) and the third cover plate (33), and the second cover plate (32) and the third cover plate (33) can rotate by taking the driving mechanism (4) as a shaft; a first limiting component is arranged between the first cover plate (31) and the second cover plate (32), and a second limiting component is arranged between the second cover plate (32) and the third cover plate (33); when the driving mechanism (4) drives the third cover plate (33) to rotate, the third cover plate (33) drives the second cover plate (32) to rotate to close the opening (11) through the second limiting component.

4. Protective tableware for preventing cross contamination of catering according to claim 3, wherein: the first limiting mechanism comprises a first limiting boss (34) arranged at the top of the first cover plate (31) and arranged along the radial direction of the first cover plate (31), and a second limiting boss (35) arranged at the bottom of the second cover plate (32) and arranged along the radial direction of the second cover plate (32); the first limiting boss (34) is positioned on one side edge of the first cover plate (31), and the second limiting boss (35) is positioned on the other side edge of the second cover plate (32); when the first limit boss (34) is abutted against the second limit boss (35), the second cover plate (32) cannot rotate continuously in the direction of closing the opening (11).

5. The protective tableware for preventing cross infection of catering according to claim 4, wherein: the second limiting mechanism comprises a third limiting boss (36) arranged at the top of the second cover plate (32) and arranged along the radial direction of the second cover plate (32), a fourth limiting boss (37) and a fifth limiting boss (38) arranged at the bottom of the third cover plate (33) and arranged along the radial direction of the third cover plate (33); the third limiting boss (36) is positioned on one side edge of the second cover plate (32), the fifth limiting boss (38) is positioned on one side edge of the third cover plate (33), and the fourth limiting boss (37) is positioned on the other side edge of the third cover plate (33); when the fifth limit boss (38) abuts against the first limit boss (34), the third cover plate (33) cannot rotate continuously in the direction of opening the opening (11).

6. Protective tableware for preventing cross contamination of catering according to claim 3, wherein: the driving mechanism (4) comprises an inverted T-shaped fixing boss (41), a connecting column (42) which is arranged on the first cover plate (31) and is cylindrical, a first plane bearing (43) which is arranged between the first cover plate (31) and the second cover plate (32) and is sleeved on the connecting column (42), a second plane bearing (44) which is arranged between the second cover plate (32) and the third cover plate (33) and is sleeved on the connecting column (42), and a driving motor (45) which is fixedly connected on the third cover plate (33); an output shaft of the driving motor (45) is fixedly connected in the connecting column (42); the upper end of the fixed boss (41) sequentially penetrates through the first cover plate (31) and the connecting column (42) and then is fixedly connected with an output shaft of the driving motor (45) through a bolt.

7. The protective tableware for preventing cross infection of catering according to claim 1, wherein: the inductor (5) comprises a shell (51) made of non-metal materials, and a first U-shaped groove, a second U-shaped groove and an object placing groove (54) are arranged in the shell (51); a first U-shaped copper sheet (52) is arranged in the first U-shaped groove, and the storage groove (54) is positioned at the opening (11) end of the first U-shaped copper sheet (52); a second U-shaped copper sheet (53) is arranged in the second U-shaped groove, the second U-shaped copper sheet (53) is sleeved outside the first U-shaped copper sheet (52), and gaps are formed between two side walls of the opening (11) end of the first U-shaped copper sheet (52) and two side walls of the opening (11) end of the second U-shaped copper sheet (53) respectively; the first U-shaped copper sheet (52) and the second U-shaped copper sheet (53) are respectively electrically connected with the driving mechanism (4) through electric wires; a magnetic bead (55) is placed in the storage groove (54), when the trigger piece (21) is close to the magnetic bead (55), one side wall of the first U-shaped copper sheet (52) is pressed to one side wall of the second U-shaped copper sheet (53) by the magnetic bead (55), and the first U-shaped copper sheet (52) is conducted with the second U-shaped copper sheet (53).

8. The protective tableware for preventing cross infection of catering according to claim 7, wherein: the bottom of the storage groove (54) is a V-shaped groove (56), and two high-position ends of the V-shaped groove (56) are positioned below two side walls of the opening (11) end of the first U-shaped copper sheet (52); the top of the article holding groove (54) is an inverted V-shaped groove (57) which is symmetrically arranged with the V-shaped groove (56).

9. The protective tableware for preventing cross infection of catering according to claim 7, wherein: the clamping end of the chopstick body (2) is made of magnetic materials or magnetic conductivity materials.

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