A kind of protective tableware that can prevent cross-infection in dining

Abstract

The present invention discloses a protective tableware that can prevent cross-infection in dining, including a tableware cover and a chopstick body. An opening is provided at the top of the tableware cover, and a closing mechanism is provided at the opening. A driving mechanism for driving the closing mechanism to close and open the opening is provided on the closing mechanism; a plurality of sensors connected to the driving mechanism are provided on the side wall of the tableware cover; a triggering member for triggering the sensors is provided on the chopstick body. When the sensors are triggered by the triggering member, the driving mechanism drives the closing mechanism to open the opening in a folding manner. The purpose of the present invention is to provide a protective tableware that can prevent cross-infection in dining; it enables diners to use serving chopsticks to pick up food.

Description

Technical Field

[0001] The present invention relates to the technical field of food tableware, and particularly relates to a protective tableware that can prevent cross-infection of food and beverages. Background Art

[0002] Currently, when multiple people dine, for public health, restaurants will provide each diner with a pair of private chopsticks and a pair of public chopsticks of a different color. The private chopsticks are used to pick up food and put it into the mouth, and the public chopsticks are used to pick up food from the plate and put it into the bowl; however, since many people do not have the habit of using public chopsticks, it is still impossible to avoid the situation of using private chopsticks to pick up dishes during the meal of multiple people. When using private chopsticks to pick up dishes, saliva will be brought into the food on the plate, which is likely to cause the spread of some infectious diseases and has a certain dining risk. Summary of the Invention

[0003] The present invention provides a protective tableware that can prevent cross-infection of food and beverages, mainly solving the problem that some diners do not use public chopsticks in the prior art.

[0004] The technical solution adopted by the present invention: A protective tableware that can prevent cross-infection of food and beverages includes a tableware cover and a chopstick body. An opening is provided at the top of the tableware cover, and a closing mechanism is provided at the opening. A driving mechanism for driving the closing mechanism to close and open the opening is provided on the closing mechanism; a plurality of sensors connected to the driving mechanism are provided on the side wall of the tableware cover; a triggering member for triggering the sensor is provided on the chopstick body. When the sensor is triggered by the triggering member, the driving mechanism drives the closing mechanism to open the opening in a folding manner.

[0005] As a preferred solution, the closing mechanism includes a first cover plate fixedly connected to the tableware cover and a third cover plate that can overlap with the first cover plate. The third cover plate is movably arranged above the first cover plate, and the driving mechanism is used to drive the third cover plate to close the opening.

[0006] A further preferred solution is that the top view shape of the tableware cover is an annular shape; a second cover plate is provided between the first cover plate and the third cover plate. The top view shapes of the first cover plate, the second cover plate, and the third cover plate are all fan-shaped. The driving mechanism is arranged at the center position of the first cover plate, the second cover plate, and the third cover plate. The second cover plate and the third cover plate can rotate around the driving mechanism as an axis; a first limiting component is provided between the first cover plate and the second cover plate, and a second limiting component is provided 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 through the second limiting component to close the opening.

[0007] In a further preferred embodiment, the first limiting mechanism includes a first limiting boss disposed on the top of the first cover plate and arranged along the radial direction of the first cover plate, and a second limiting boss disposed on the bottom of the second cover plate and arranged along the radial direction of the second cover plate; the first limiting boss is located on one side edge of the first cover plate, and the second limiting boss is located on the other side edge of the second cover plate; when the first limiting boss abuts against the second limiting boss, the second cover plate cannot continue to rotate in the direction of closing the opening. In a further preferred embodiment, the second limiting mechanism includes a third limiting boss disposed on 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 on the bottom of the third cover plate and arranged along the radial direction of the third cover plate; the third limiting boss is located on one side edge of the second cover plate, the fifth limiting boss is located on one side edge of the third cover plate, and the fourth limiting boss is located 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 continue to rotate in the direction of opening the opening.

[0008] In a further preferred embodiment, the driving mechanism includes an inverted T-shaped fixed boss, a cylindrical connecting column disposed on the first cover plate, a first plain bearing disposed between the first cover plate and the second cover plate and sleeved on the connecting column, a second plain bearing disposed 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; the output shaft of the driving motor is fixedly connected inside the connecting column; the upper end of the fixed boss sequentially passes through the first cover plate and the connecting column and is fixedly connected to the output shaft of the driving motor by a bolt.

[0009] As a preferred embodiment, the inductor includes a housing made of a non-metallic material, and a first U-shaped groove, a second U-shaped groove and a placing groove are provided inside the housing; a first U-shaped copper sheet is installed in the first U-shaped groove, and the placing groove is located at the open end of the first U-shaped copper sheet; a second U-shaped copper sheet is installed in the second U-shaped groove, the second U-shaped copper sheet is sleeved outside the first U-shaped copper sheet, and there are gaps between the two side walls of the open end of the first U-shaped copper sheet and the two side walls of the open 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 to the driving mechanism through wires respectively; a magnetic bead is placed in the placing groove, and when the triggering member approaches the magnetic bead, the magnetic bead presses one side wall of the first U-shaped copper sheet against one side wall of the second U-shaped copper sheet, so that the first U-shaped copper sheet and the second U-shaped copper sheet are electrically connected. In a further preferred embodiment, the bottom of the placing groove is a V-shaped groove, and the two high-position ends of the V-shaped groove are located below the two side walls of the open end of the first U-shaped copper sheet; the top of the placing groove is an inverted V-shaped groove whose structure is symmetrically arranged with the V-shaped groove. In a further preferred embodiment, the clamping end of the chopstick body is made of a magnetic material or a magnetically conductive material.

[0010] The beneficial effects of the present invention adopting the above structure are as follows: This structural design can force diners to use serving chopsticks for picking up food, which is conducive to enhancing the awareness of diners to use serving chopsticks and reducing the risk of cross-infection. At the same time, this design can also prevent the food in the plate from continuously contacting the flowing air, realizing the function of keeping the food in the plate warm and slowing down the cooling speed of the food, and can avoid the situation where saliva flies into the food when diners chat. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram when the closing mechanism closes the opening in the embodiment of the present invention;

[0012] Figure 2 is a schematic structural diagram when the closing mechanism opens the opening in the embodiment of the present invention;

[0013] Figure 3 is an exploded view of the closing mechanism in the embodiment of the present invention;

[0014] Figure 4 is an axial sectional view of the driving mechanism in the embodiment of the present invention;

[0015] Figure 5 is a schematic structural diagram when the first limiting boss and the second limiting boss are in contact in the embodiment of the present invention;

[0016] Figure 6 is a schematic structural diagram when the first limiting boss and the fifth limiting boss are in contact in the embodiment of the present invention;

[0017] Figure 7 is a schematic structural diagram when the sensor housing is opened in the embodiment of the present invention;

[0018] Figure 8 is a partial sectional view of the sensor in the embodiment of the present invention.

[0019] In the figure: 1 - tableware cover, 2 - chopstick body, 3 - closing mechanism, 4 - driving mechanism, 5 - sensor; 11 – opening, 12 - flanging; 21 - triggering member; 31 - first cover plate, 32 - second cover plate, 33 - third cover plate, 34 - first limiting boss, 35 - second limiting boss, 36 - third limiting boss, 37 - fourth limiting boss, 38 - fifth limiting boss; 41 - fixed boss, 42 - connecting column, 43 - first plain bearing, 44 - second plain bearing, 45 - driving motor; 51 - housing, 52 - first U-shaped copper sheet, 53 - second U-shaped copper sheet, 54 - placing groove, 55 - magnetic bead, 56 - V-shaped groove, 57 - inverted V-shaped groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figure 1-8 shown, a kind of protective tableware that can prevent cross-infection in catering includes a tableware cover 1 and a chopstick body 2. An opening 11 is provided at the top of the tableware cover 1, and a closing mechanism 3 is provided at the opening 11. A driving mechanism 4 for driving the closing mechanism 3 to close and open the opening 11 is provided on the closing mechanism 3; a plurality of sensors 5 connected to the driving mechanism 4 are provided on the side wall of the tableware cover 1; a triggering member 21 for triggering the sensor 5 is provided on the chopstick body 2. When the sensor 5 is triggered by the triggering member 21, the driving mechanism 4 drives the closing mechanism 3 to open the opening 11 in a folding manner. The chopstick body 2 in this invention is used as a serving chopstick, and ordinary plastic / wooden chopsticks on the market are used as personal chopsticks; the tableware cover 1 can adopt two types of structures. The first type of structure (the figure shows the first type of structure) is a structure that covers the outside of the dinner plate and completely covers the dinner plate inside the tableware cover 1. There is no requirement for the shape of the tableware cover 1. Therefore, the tableware cover 1 of this structure can be made into a structure with a square, circular, oval or other graphic top view; the second type of structure is a structure that covers the top of the dinner plate, and this structure requires the shape of the tableware cover 1 to be adapted to the top of the dinner plate.

[0022] When in use, cover the tableware cover 1 of the present invention on the dinner plate. When the diner uses the serving chopstick to pick up food, the sensor 5 is triggered by the triggering member 21 on the serving chopstick, generating a signal to the driving mechanism 4. The driving mechanism 4 drives the closing mechanism 3 to open the opening 11, and the diner can use the serving chopstick to pick up food. After the closing mechanism 3 opens the opening 11 for a certain period of time, the closing mechanism 3 closes the opening 11 again. When using the personal chopstick to pick up food, the sensor 5 cannot be triggered, and the closing mechanism 3 will not open the opening 11. Therefore, this design can force the diner to use the serving chopstick to pick up food, which is beneficial to enhancing the diner's awareness of using the serving chopstick, reducing the risk of cross-infection. At the same time, this design can also keep the food in the dinner plate warm, slow down the cooling speed of the food, and avoid the situation where saliva flies into the food when the diner chats.

[0023] As a preferred solution, the closing mechanism 3 includes a first cover plate 31 fixedly connected to the tableware cover 1 and a third cover plate 33 that can overlap 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 to drive the third cover plate 33 to close the opening 11. In the structure of this solution, the first cover plate 31 blocks a part of the opening 11. Driven by the driving mechanism 4, the third cover plate 33 can close the opening 11 in a manner of parallel sliding closure or rotational closure.

[0024] In a further preferred solution, the top view shape of the tableware cover 1 is an annular shape; a second cover plate 32 is provided between the first cover plate 31 and the third cover plate 33. The top view shapes of the first cover plate 31, the second cover plate 32, and the third cover plate 33 are all fan-shaped. The driving mechanism 4 is arranged at the center positions of the first cover plate 31, the second cover plate 32, and the third cover plate 33. The second cover plate 32 and the third cover plate 33 can rotate around the driving mechanism 4; a first limiting component is provided between the first cover plate 31 and the second cover plate 32, and a second limiting component is provided 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 through the second limiting component to close the opening 11; in the structure of this solution, the driving mechanism 4 can drive the third cover plate 33 to rotate, and the third cover plate 33 drives the second cover plate 32 to move through the second limiting component, finally closing the opening 11 with the third cover plate 33 and the second cover plate 32; compared with the structure with only the first cover plate 31 and the third cover plate 33 alone, this structure has a smaller area blocking the opening 11, and the design of arranging the driving mechanism 4 at the center positions of the three cover plates makes the three cover plates not exceed the outside of the tableware cover 1 after folding, with a more reasonable structure. And when the three cover plates are folded, the folded angle is about 130°, and the angle of the opening without blockage is about 230°, which is more suitable for use on a large round table. In a further preferred solution, a stepped groove adapted to the first cover plate 31, the second cover plate 32, and the third cover plate 33 can be provided at the top of the tableware cover 1 to facilitate the installation of the first cover plate 31 and the blocking of the edges of the second cover plate 32 and the third cover plate 33, improving the overall aesthetic appearance.

[0025] A further preferred solution is that the first limiting mechanism includes a first limiting boss 34 arranged on the top of the first cover plate 31 and along the radial direction of the first cover plate 31, and a second limiting boss 35 arranged on the bottom of the second cover plate 32 and along the radial direction of the second cover plate 32; the first limiting boss 34 is located on one side edge of the first cover plate 31, and the second limiting boss 35 is located on the other side edge of the second cover plate 32; when the first limiting boss 34 abuts against the second limiting boss 35, the second cover plate 32 cannot continue to rotate in the direction of closing the opening 11; the limiting function of this limiting structure is simple and effective, which is convenient for manufacturers to produce and helps to reduce production costs.

[0026] A further preferred solution is that the second limiting mechanism includes a third limiting boss 36 arranged on the top of the second cover plate 32 and along the radial direction of the second cover plate 32, and a fourth limiting boss 37 and a fifth limiting boss 38 arranged on the bottom of the third cover plate 33 and along the radial direction of the third cover plate 33; the third limiting boss 36 is located on one side edge of the second cover plate 32, the fifth limiting boss 38 is located on one side edge of the third cover plate 33, and the fourth limiting boss 37 is located on the other side edge of the third cover plate 33; when the fifth limiting boss 38 abuts against the first limiting boss 34, the third cover plate 33 cannot continue to rotate in the direction of opening the opening 11; the limiting function of this limiting structure is simple and effective, which is convenient for manufacturers to produce and helps to reduce production costs.

[0027] Further preferred solution: The driving mechanism 4 includes an inverted T-shaped fixed boss 41, a cylindrical connecting column 42 provided on the first cover plate 31, a first plain bearing 43 provided between the first cover plate 31 and the second cover plate 32 and sleeved on the connecting column 42, a second plain bearing 44 provided between the second cover plate 32 and the third cover plate 33 and sleeved on the connecting column 42, and a driving motor 45 fixedly connected to the third cover plate 33; the output shaft of the driving motor 45 is fixedly connected inside 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 is fixedly connected to the output shaft of the driving motor 45 through a bolt. Through the cooperation of the two plain bearings, the smoothness during the rotation of each cover plate can be improved, the wear rate of each cover plate can be reduced, and finally the service life of the tableware can be prolonged. Grooves for placing plain bearings can also be machined on the back surfaces of the second cover plate 32 and the third cover plate 33 to facilitate reducing the stacked thickness of the three cover plates; the fixed boss 41 can be integrally formed with the first cover plate 31 or fixedly connected together through 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 the corresponding travel switches, and after being triggered, the travel switches send induction signals to the control circuit so that the control circuit controls the driving motor 45 to stop rotating; of course, the driving motor 45 can also be controlled by sensing the torque of the driving motor 45. In order to facilitate the waiter to clean the tableware cover, the driving motor 45 can be a waterproof motor or sealed with a cover. The motor driving circuit board of the driving motor 45 can be an external type or directly installed on the top of the third cover plate 33 with a sealed cover added. The driving motor is electrically connected to the motor driving circuit board through the inductor 5, and a timer, a main switch and a lithium battery are also connected to the motor driving circuit board; the sealed cover can prevent each electronic component from being affected by water ingress, and because of the lithium battery, the tableware can be taken and used at any time without being connected to a socket. 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 chips such as BTS7970 or L298. A waterproof ring in the prior art can be installed at the connection between the third cover plate 33 and the driving motor 45 for waterproofing.

[0028] Even further preferred solution: Each cover plate is made of anti-fog glass or other food-grade transparent materials, and the tableware cover 1 can be made of aluminum alloy, plastic material, food-grade transparent material or a combination of the above materials; the food-grade transparent material such as pp plastic material; the purpose of setting each cover plate as anti-fog glass is that when the tableware cover 1 is closed on the dinner plate, diners can view the food status in the dinner plate through each cover plate, and the anti-fog glass can prevent water droplets, water mist, etc. from generating on each cover plate and affecting the vision; of course, in order to reduce the production cost of each cover plate, the manufacturer can also use other opaque materials.

[0029] As a preferred solution, the sensor 5 includes a housing 51 made of a non-metallic material. A first U-shaped groove, a second U-shaped groove, and a storage groove 54 are provided inside the housing 51. A first U-shaped copper sheet 52 is installed in the first U-shaped groove. The storage groove 54 is located at the open end 11 of the first U-shaped copper sheet 52. A second U-shaped copper sheet 53 is installed in the second U-shaped groove. The second U-shaped copper sheet 53 is sleeved outside the first U-shaped copper sheet 52, and there are gaps between the two side walls of the open end 11 of the first U-shaped copper sheet 52 and the two side walls of the open end 11 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 electrically connected to the driving mechanism 4 through wires respectively. A magnetic bead 55 is placed in the storage groove 54. When the trigger 21 approaches 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, making the first U-shaped copper sheet 52 and the second U-shaped copper sheet 53 conduct. The design of the structure of this sensor 5 enables the diner to simply bring the serving chopsticks close to the corresponding area, and the magnetic bead 55 will be driven to move. The magnetic bead 55 presses one side wall of the first U-shaped copper sheet 52 against the corresponding side wall of the second U-shaped copper sheet 53, thereby sending a signal to the control circuit. The principle of this sensor 5 is the same as that of a tactile switch, but the design of this structure can be more suitable for actual use. The purpose of setting the magnetic bead 55 in the sensor 5 is that the serving chopsticks are often heated during use. If a magnet is set in the serving chopsticks, the magnet is likely to be demagnetized, affecting the use. And if the sensor 5 is replaced with various electronic sensors, the cost and usage requirements are too high. Therefore, the present invention has carried out a new structural design for the sensor 5.

[0030] In a further preferred solution, the bottom of the storage groove 54 is a V-shaped groove 56, and the two high-position ends of the V-shaped groove 56 are located below the two side walls of the open end 11 of the first U-shaped copper sheet 52. The top of the storage groove 54 is an inverted V-shaped groove 57 whose structure is symmetrically arranged with the V-shaped groove 56. This enables the magnetic bead 55 to be placed in the V-shaped groove 56 when it is not in use, avoiding accidental touch. The design of the inverted V-shaped groove 57 enables this sensor 5 to be installed and used normally in both the forward and reverse directions, facilitating the installation by the manufacturer. In a further preferred solution, the clamping end of the chopstick body 2 is made of a magnetic material or a magnetically conductive material, or the trigger 21 can be set as an iron column and then wrapped with a plastic material to finally form the chopstick body 2.

[0031] In an even further preferred solution, the top of the tableware cover 1 is provided with a turned-out flange 12, and the sensor 5 is installed inside the flange. This structural design makes the sensor 5 not exposed, and the wires of the sensor 5 can be hidden inside the flange, improving the overall aesthetic appearance of the device.

[0032] To facilitate the understanding of the working principle of the present invention, the principle of the present invention after combining all preferred solutions is described below.

[0033] When in use, the waiter puts the tableware cover 1 of the present invention on the dinner plate and turns on the main switch. When the diners use the serving chopsticks to pick up the dishes, the magnetic beads 55 in the sensor 5 are attracted by the iron column on the serving chopsticks, so that the side wall of the first U-shaped copper sheet 52 and the side wall of the second U-shaped copper sheet 53 are in contact and connected, and the generated electrical signal is sent to the motor driving circuit board, which controls the driving motor 45 to drive the third cover plate 33 to rotate. When the third cover plate 33 rotates to a certain angle, it drives the second cover plate 32 to rotate, thereby opening the opening 11. When the third cover plate 33 and the second cover plate 32 rotate to the specified position, the driving motor 45 stops rotating, and the timer starts timing. After the preset number of seconds is reached, the timer sends a signal to the motor driving circuit board, and the motor driving circuit board controls the driving motor 45 to rotate in the opposite direction until the third cover plate 33 and the second cover plate 32 close the opening 11. During the closing period of the third cover plate 33 and the second cover plate 32, if the sensor 5 is sensed again, the driving motor 45 controls the opening 11 of the third cover plate 33 and the second cover plate 32 again, and the timer counts again.

[0034] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the description of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the relevant technical field, if they do not depart from the scope of the technical features of the present invention, can make equivalent embodiments by partial changes or modifications to the technical contents disclosed in the present invention, and they still fall within the scope of the technical features of the present invention without departing from the technical features of the present invention.

Claims

1. A protective tableware that can prevent cross-infection in dining, comprising a tableware cover (1) and a chopstick body (2), characterized in that: The top of the tableware cover (1) is provided with an opening (11), and a closing mechanism (3) is arranged at the opening (11). A driving mechanism (4) for driving the closing mechanism (3) to close and open the opening (11) is arranged on the closing mechanism (3); a plurality of sensors (5) connected to the driving mechanism (4) are arranged on the side wall of the tableware cover (1); a triggering member (21) for triggering the sensor (5) is arranged on the chopstick body (2); after the closing mechanism (3) opens the opening (11) for a certain period of time, the closing mechanism (3) closes the opening (11) again; the closing mechanism (3) includes a first cover plate (31) fixedly connected to the tableware cover (1) and a third cover plate (33) that can overlap 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 to drive the third cover plate (33) to close the opening (11); the top view shape of the tableware cover (1) is an annular shape; a second cover plate (32) is arranged between the first cover plate (31) and the third cover plate (33). The top view shapes of the first cover plate (31), the second cover plate (32), and the third cover plate (33) are all fan-shaped. The driving mechanism (4) is arranged at the center positions of the first cover plate (31), the second cover plate (32), and the third cover plate (33). The second cover plate (32) and the third cover plate (33) can rotate around 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 and close the opening (11) through the second limiting component.

2. The protective tableware capable of preventing cross-infection in catering according to claim 1, wherein: The first limiting mechanism includes a first limiting boss (34) arranged 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) arranged on 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 located on one side edge of the first cover plate (31), and the second limiting boss (35) is located on the other side edge of the second cover plate (32); when the first limiting boss (34) abuts against the second limiting boss (35), the second cover plate (32) cannot continue to rotate in the direction of closing the opening (11).

3. A protective tableware capable of preventing cross-infection in catering according to claim 2, characterized in that: The second limiting mechanism includes a third limiting boss (36) arranged on the top of the second cover plate (32) and along the radial direction of the second cover plate (32), a fourth limiting boss (37) and a fifth limiting boss (38) arranged on the bottom of the third cover plate (33) and along the radial direction of the third cover plate (33); the third limiting boss (36) is located on one side edge of the second cover plate (32), the fifth limiting boss (38) is located on one side edge of the third cover plate (33), and the fourth limiting boss (37) is located on the other side edge of the third cover plate (33); when the fifth limiting boss (38) abuts against the first limiting boss (34), the third cover plate (33) cannot continue to rotate in the direction of the opening (11).

4. A protective tableware capable of preventing cross-infection in catering according to claim 1, characterized in that: The driving mechanism (4) includes an inverted T-shaped fixed boss (41), a cylindrical connecting column (42) arranged on the first cover plate (31), a first plain bearing (43) arranged between the first cover plate (31) and the second cover plate (32) and sleeved on the connecting column (42), a second plain bearing (44) arranged between the second cover plate (32) and the third cover plate (33) and sleeved on the connecting column (42), and a driving motor (45) fixedly connected to the third cover plate (33); the output shaft of the driving motor (45) is fixedly connected inside the connecting column (42); the upper end of the fixed boss (41) sequentially passes through the first cover plate (31) and the connecting column (42) and is fixedly connected to the output shaft of the driving motor (45) by bolts.

5. A protective tableware capable of preventing cross-infection in catering according to claim 1, characterized in that: The inductor (5) includes a housing (51) made of a non-metallic material. The housing (51) is provided with a first U-shaped groove, a second U-shaped groove and a placing groove (54); a first U-shaped copper sheet (52) is installed in the first U-shaped groove, and the placing groove (54) is located at the opening (11) end of the first U-shaped copper sheet (52); a second U-shaped copper sheet (53) is installed in the second U-shaped groove. The second U-shaped copper sheet (53) is sleeved outside the first U-shaped copper sheet (52), and there are gaps between the two side walls of the opening (11) end of the first U-shaped copper sheet (52) and the 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 electrically connected to the driving mechanism (4) through wires respectively; a magnetic bead (55) is placed in the placing groove (54). When the triggering member (21) approaches 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).

6. The protective tableware capable of preventing cross-infection in catering according to claim 5, characterized in that: The bottom of the placing groove (54) is a V-shaped groove (56), and the two high-position ends of the V-shaped groove (56) are located below the two side walls of the opening (11) end of the first U-shaped copper sheet (52); the top of the placing groove (54) is an inverted V-shaped groove (57) whose structure is symmetrically arranged with the V-shaped groove (56).

7. A protective tableware capable of preventing cross-infection in catering according to claim 5, characterized in that: The clamping end of the chopstick body (2) is made of a magnetic material or a magnetically conductive material.

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