An oven key management system and oven apparatus

Abstract

The application discloses a kind of oven key management system and oven equipment, the oven key management system includes sub pin, sub key management device and main pin, the sub key management device includes sub pin box, first main switch component and sub electromagnetic limiting component, the top of the sub pin box is equipped with the first main pin hole for the main pin insertion and the sub pin hole for the sub pin insertion, the first main switch component is used to connect main electromagnetic loop when the main pin is inserted into first main pin hole, and used to disconnect main electromagnetic loop when the main pin is pulled out from first main pin hole, the sub electromagnetic limiting component is used to lose power and be located in limit position when main electromagnetic loop is disconnected, and used to get power and be located in recovery position when main electromagnetic loop is connected. The application can realize intelligent management to sub pin, save time and effort, and convenient operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of equipment safety control, in particular to an oven key management system of a coating machine and an oven equipment. BACKGROUND

[0002] The oven door of the existing oven equipment is generally provided with a door lock assembly, which is generally realized by a sub-pin to realize unlocking or locking. The door lock assembly is generally a safety lock that can monitor the opening and closing state of the oven door. Specifically, the door lock assembly is connected with the controller through a cable. When the door lock assembly is unlocked by the sub-pin, the door lock assembly sends an unlocking signal to the controller, indicating that the oven door has been opened. When the door lock assembly is locked by the sub-pin, the door lock assembly sends a locking signal to the controller, indicating that the oven door has been closed.

[0003] At present, the management of the sub-pin of the door lock assembly is generally managed by artificial centralized management to limit access, which is time-consuming and laborious. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application provides an oven key management system and an oven equipment, which can realize intelligent management of the sub-pin, saving time and labor.

[0005] The technical scheme adopted by the present application to solve its technical problems is:

[0006] The first aspect of the present application provides an oven key management system, comprising a sub-pin for unlocking or locking a door lock assembly, a sub-key management device, and a main pin. The sub-key management device comprises a sub-pin box, a first main switch assembly, and a sub-electromagnetic limiting assembly. The top end of the sub-pin box is provided with a first main pin hole for inserting the main pin and a sub-pin hole for inserting the sub-pin. The first main switch assembly is used to connect the main electromagnetic circuit when the main pin is inserted into the first main pin hole, and to disconnect the main electromagnetic circuit when the main pin is pulled out of the first main pin hole. The sub-electromagnetic limiting assembly is used to lose power and be in a limiting position to block the sub-pin from being inserted into or pulled out of the sub-pin hole when the main electromagnetic circuit is disconnected, and to be powered on and be in a retracted position to enable the sub-pin to be inserted into or pulled out of the sub-pin hole when the main electromagnetic circuit is connected.

[0007] The second aspect of the present application provides a baking oven device, comprising a baking oven, and further comprising the baking oven key management system described in the above technical solution, the baking oven comprises a box body and a door lock assembly, the front of the box body is provided with a door frame, the door frame is provided with a door at the position of the door frame, the door lock assembly is arranged on the door frame and the door, and the sub-pin of the baking oven key management system is used for unlocking or locking the door lock assembly to realize the opening or closing of the door.

[0008] The present application has the advantages that: the sub-key management device and the main pin can realize intelligent management of the sub-pin, saving time and effort, and being convenient to operate, the main key management device, the power supply and the PLC controller can realize intelligent management of the main pin, saving time and effort, and being convenient to operate, and the sub-pin, the main pin, the sub-key management device, the main key management device, the power supply and the controller are combined together, so that the opening and closing state of the door of the baking oven can be monitored, the safety production of the baking oven is ensured, and compared with the monitoring mode of the door lock assembly in the prior art, the door lock assembly does not need to be connected with the controller through a cable, the use of the cable in the production area can be reduced, the structure is simplified, and the operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0009] The present application will be further described below in combination with the drawings and examples.

[0010] Figure 1 is a structure schematic view of a sub-key management device of a baking oven key management system provided by an embodiment of the present application;

[0011] Figure 2 is Figure 1 is a sectional view schematic view of the first kind of scheme that the main pin of the baking oven key management system shown in the figure is inserted into the first main pin hole of the sub-key management device;

[0012] Figure 3 is Figure 2 is a sectional view schematic view of the first kind of scheme that the sub-pin of the baking oven key management system shown in the figure is inserted into the sub-pin hole of the sub-key management device;

[0013] Figure 4 is Figure 1 is a sectional view schematic view of the first kind of scheme that the sub-pin of the baking oven key management system shown in the figure is inserted into the sub-pin hole of the sub-key management device;

[0014] Figure 5 is Figure 4 is a sectional view schematic view of the first kind of scheme that the sub-pin of the baking oven key management system shown in the figure is inserted into the sub-pin hole of the sub-key management device;

[0015] Figure 6 isFigure 1 The first main switch component and sub-switch component of the oven key management system shown are both circuit schematics of the first solution;

[0016] Figure 7 This is a schematic diagram of the structure of the master key management device of the oven key management system;

[0017] Figure 8 yes Figure 7 A cross-sectional schematic diagram of a first solution in which the master latch of the oven key management system is inserted into the second master latch hole of the master key management device;

[0018] Figure 9 yes Figure 8 A schematic cross-sectional view of the master key management device of the oven key management system, showing a limit pin on one side of the second master latch hole in a retracted position and an upper contact of the second main switch assembly disconnected from a lower contact;

[0019] Figure 10 yes Figure 7 The second main switch assembly of the oven key management system shown is a circuit diagram of the first solution;

[0020] Figure 11 yes Figure 1 A cross-sectional schematic diagram of a second solution in which the main latch of the oven key management system is inserted into the first main latch hole of the sub-key management device;

[0021] Figure 12 yes Figure 1 A cross-sectional schematic diagram of a second solution in which a sub-latch of the oven key management system is inserted into a sub-latch hole of a sub-key management device;

[0022] Figure 13 is a cross-sectional schematic diagram of a second solution in which the main latch of the oven key management system is inserted into the second main latch hole of the master key management device;

[0023] Figure 14 This is a circuit diagram of the first main switch component, sub-switch component, and second main switch component of the oven key management system for the second solution;

[0024] Figure 15 This is a schematic structural diagram of an oven of an oven device provided by one embodiment of the present invention;

[0025] Figure 16 yes Figure 15 A local enlarged schematic diagram of point A shown;

[0026] Figure 17 yes Figure 15 A schematic cross-sectional view of a door lock assembly of the oven of the oven apparatus shown;

[0027] Figure 18 is Figure 15 A cross-sectional view of the lock hole of the door lock assembly of the oven equipment when the sub-pin is inserted. DETAILED DESCRIPTION

[0028] The concept, specific structure and technical effects of the present application will be described clearly and completely in combination with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, and other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative labor are within the protection scope of the present application. In addition, all the coupling / connection relationships involved in the patent do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation situation. The technical features in the present application can be combined interactively without conflict.

[0029] Please refer to Figures 1 to 6 An oven key management system provided by an embodiment of the present application includes a sub-key management device 10, a main pin 20, a sub-pin 30, a main key management device 40, a power supply and a controller. The controller is a PLC controller. The sub-pin 30 is used to unlock or lock the door lock assembly of the oven, so as to realize opening or closing the oven door. The power supply is preferably a 24-volt DC power supply. The main pin 20 and the sub-pin 30 are the same in structure, and both include a body and a head formed at the bottom end of the body.

[0030] The sub-key management device 10 includes a sub-pin box body 12, a first main switch assembly 15, a sub-electromagnetic limiting assembly 18, a sub-switch assembly 19 and a first main electromagnetic limiting assembly 17. The first main switch assembly 15 and the sub-switch assembly 19 are both mechanical switches, preferably contact switches. The top end of the sub-pin box body 12 is provided with a first main pin hole 13 for inserting the main pin 20 and a sub-pin hole 14 for inserting the sub-pin 30. The bottom part of the first main pin hole 13 and the bottom part of the sub-pin hole 14 are respectively provided with through holes in communication with the inside of the sub-pin box body 12. When the main pin 20 is inserted into the first main pin hole 13, the head of the main pin 20 can extend into the sub-pin box body 12 through the through hole in the bottom part of the first main pin hole 13. When the sub-pin 30 is inserted into the sub-pin hole 14, the head of the sub-pin 30 can extend into the sub-pin box body 12 through the through hole in the bottom part of the sub-pin hole 14.

[0031] The first main switch assembly 15 is connected between the positive and negative poles of the power supply and forms a main electromagnetic circuit with the positive and negative poles of the power supply. The first main switch assembly 15 is used to turn on the main electromagnetic circuit when the main plug 20 is inserted into the first main plug hole 13, and is used to turn off the main electromagnetic circuit when the main plug 20 is pulled out of the first main plug hole 13.

[0032] The first main switch assembly 15 is connected between the positive and negative poles of the power supply and forms a main electromagnetic circuit with the positive and negative poles of the power supply. The first main switch assembly 15 is used to turn on the main electromagnetic circuit when the main plug 20 is inserted into the first main plug hole 13, and is used to turn off the main electromagnetic circuit when the main plug 20 is pulled out of the first main plug hole 13.

[0033] The first main switch assembly 15 is connected between the positive and negative poles of the power supply and forms a main electromagnetic circuit with the positive and negative poles of the power supply. The first main switch assembly 15 is used to turn on the main electromagnetic circuit when the main plug 20 is inserted into the first main plug hole 13, and is used to turn off the main electromagnetic circuit when the main plug 20 is pulled out of the first main plug hole 13.

[0034] The first main switch assembly 15 is connected between the positive and negative poles of the power supply and forms a main electromagnetic circuit with the positive and negative poles of the power supply. The first main switch assembly 15 is used to turn on the main electromagnetic circuit when the main plug 20 is inserted into the first main plug hole 13, and is used to turn off the main electromagnetic circuit when the main plug 20 is pulled out of the first main plug hole 13.

[0035] The first main switch assembly 15 is connected between the positive and negative poles of the power supply and forms a main electromagnetic circuit with the positive and negative poles of the power supply. The first main switch assembly 15 is used to turn on the main electromagnetic circuit when the main plug 20 is inserted into the first main plug hole 13, and is used to turn off the main electromagnetic circuit when the main plug 20 is pulled out of the first main plug hole 13.

[0036] Specifically, the first main partition 162 and the sub partition 163 are respectively arranged at one side of the first main plug hole 13 and at one side of the sub plug hole 14 in the sub plug box 12. One end of the first main partition 162 and the sub partition 163 is arranged at the top of the sub plug box 12, and the other end faces the bottom of the sub plug box 12. The first main switch assembly 15 and the sub switch assembly 19 have the same structure, and both include an upper spring 152 and a lower spring 153. The lower spring 153 is arranged at the bottom of the sub plug box 12 and below the upper spring 152, and the lower spring 153 and the upper spring 152 are arranged in parallel. A compression elastic element 154 is arranged between the upper spring 152 and the lower spring 153. The compression elastic element 154 is preferably a compression spring.

[0037] As shown in Figure 2 , Figure 3 , Figure 6 , in the first main switch assembly 15, one end of the upper spring 152 is rotatably arranged to the first main partition plate 162 through a rotating shaft and connected with the positive pole of the power supply, and the other end is located below the first main bolt hole 13 and forms an upper contact 1522. One end of the lower spring 153 is connected with the bottom end of the first main partition plate 162 and connected with the negative pole of the power supply, and the other end forms a lower contact 1532, which is arranged opposite to the upper contact 1522. The upper spring 152 and the lower spring 153 form a main electromagnetic circuit with the positive pole and the negative pole of the power supply, and the upper contact 1522 and the lower contact 1532 are used to contact and conduct when the main bolt 20 is inserted into the first main bolt hole 13, thereby realizing the connection of the main electromagnetic circuit, and are used to disconnect the contact when the main bolt 20 is pulled out of the first main bolt hole 13, thereby realizing the disconnection of the main electromagnetic circuit. In actual application, when the main bolt 20 is inserted into the first main bolt hole 13, the head of the main bolt 20 can extend into the sub-bolt box 12 and press down the end of the upper spring 152 where the upper contact 1522 is arranged, so that the upper contact 1522 and the lower contact 1532 are in contact and conduct.

[0038] As shown in Figures 4 to 6 , in the sub-switch assembly 19, one end of the upper spring 152 is rotatably arranged to the sub-partition plate 163 through a rotating shaft and connected with the positive pole of the power supply, and the other end is located below the sub-bolt hole 14 and forms an upper contact 1522. One end of the lower spring 153 is connected with the bottom end of the sub-partition plate 163 and connected with the negative pole of the power supply, and the other end forms a lower contact 1532, which is arranged opposite to the upper contact 1522. The upper spring 152 and the lower spring 153 form a sub-electromagnetic circuit with the positive pole and the negative pole of the power supply, and the upper contact 1522 and the lower contact 1532 are used to contact and conduct when the sub-bolt 30 is inserted into the sub-bolt hole 14, thereby realizing the connection of the sub-electromagnetic circuit, and are used to disconnect the contact when the sub-bolt 30 is pulled out of the sub-bolt hole 14, thereby realizing the disconnection of the sub-electromagnetic circuit. In actual application, when the sub-bolt 30 is inserted into the sub-bolt hole 14, the head of the sub-bolt 30 can extend into the sub-bolt box 12 and press down the end of the upper spring 152 where the upper contact 1522 is arranged, so that the upper contact 1522 and the lower contact 1532 are in contact and conduct.

[0039] The sub-electromagnetic limiting assembly 18 and the first main electromagnetic limiting assembly 17 have the same structure, both including an electromagnet 172, an L-shaped limiting pin 173 located on one side of the electromagnet 172, a connecting rod 174, and a tensile elastic member 175. The side of the limiting pin 173 close to the electromagnet 172 is provided with an armature 1732, and one end of the electromagnet 172 is opposite to the armature 1732. The tensile elastic member 175 is preferably a tensile spring.

[0040] In the sub-electromagnetic limiting component 18, as shown in Figures 4 to 6 , the limiting pin 173 is located between the electromagnet 172 and the sub-insertion hole 14. The end of the electromagnet 172 away from the armature 1732 is arranged to the sub-baffle 163, and the electromagnet 172 is connected between the first main switch component 15 and the negative pole of the power supply. The inner wall of the sub-insertion hole 14 is provided with a sub-limiting hole 142, and the electromagnet 172 is used to lose power and disconnect the adsorption of the armature 1732 of the limiting pin 173 to make the limiting pin 173 located in the limiting position when the main electromagnetic circuit is disconnected, and is used to get power and adsorb the armature 1732 of the limiting pin 173 to make the limiting pin 173 located in the retracted position when the main electromagnetic circuit is connected. When the limiting pin 173 is located in the limiting position, the first end of the limiting pin 173 passes through the sub-limiting hole 142 and is clamped with the recessed position 32 of the sub-insertion pin 30 or extends into the sub-insertion hole 14, so that the sub-insertion pin 30 can be blocked from being inserted into or pulled out of the sub-insertion hole 14 by the limiting pin 173. When the limiting pin 173 is located in the retracted position, the first end of the limiting pin 173 is located in the sub-limiting hole 142, so that the sub-insertion pin 30 can be inserted into or pulled out of the sub-insertion hole 14.

[0041] In the sub-electromagnetic limiting component 18, one end of the connecting rod 174 is arranged to the sub-baffle 163, and the other end is rotatably connected to the limiting pin 173 through a rotating shaft and faces the sub-insertion hole 14, and the stretching elastic member 175 is connected between the second end of the limiting pin 173 and the sub-baffle 163.

[0042] In the first main electromagnetic limiting component 17, as shown in Figure 2 , Figure 3 and Figure 6 , the limiting pin 173 is located between the electromagnet 172 and the first main insertion hole 13. The end of the electromagnet 172 away from the armature 1732 is arranged to the first main baffle 162, and the electromagnet 172 is connected between the sub-switch component 19 and the negative pole of the power supply. The inner wall of the first main insertion hole 13 is provided with a first main limiting hole 132, and the electromagnet 172 is used to lose power and disconnect the adsorption of the armature 1732 of the limiting pin 173 to make the limiting pin 173 located in the limiting position when the sub-electromagnetic circuit is disconnected, and is used to get power and adsorb the armature 1732 of the limiting pin 173 to make the limiting pin 173 located in the retracted position when the sub-electromagnetic circuit is connected. When the limiting pin 173 is located in the limiting position, the first end of the limiting pin 173 passes through the first main limiting hole 132 and is clamped with the recessed position 22 of the main insertion pin 20, so that the main insertion pin 20 can be blocked from being pulled out of the first main insertion hole 13 by the limiting pin 173. When the limiting pin 173 is located in the retracted position, the first end of the limiting pin 173 is located in the first main limiting hole 132, so that the main insertion pin 20 can be pulled out of the first main insertion hole 13.

[0043] In the first main electromagnetic limiting component 17, one end of the connecting rod 174 is arranged to the first main partition plate 162, and the other end is arranged towards the first main bolt hole 13 and rotatably connected with the limiting pin 173 through a rotating shaft. The stretching elastic member 175 is connected between the second end of the limiting pin 173 and the first main partition plate 162.

[0044] In the embodiment, the electromagnet 172 includes a magnet body 1722 and a coil 1723 arranged on the magnet body 1722. The coil 1723 of the sub-electromagnetic limiting component 18 is connected between the first main switch component 15 and the negative pole of the power supply, for losing power when the main electromagnetic circuit is disconnected and for getting power when the main electromagnetic circuit is connected. The magnet body 1722 is used for absorbing the armature 1732 of the limiting pin 173 under the electromagnetic induction generated by the coil 1723 when the coil 1723 gets power and for disconnecting the absorption of the armature 1732 of the limiting pin 173 when the coil 1723 loses power.

[0045] Through the above structure, in actual application, in the equipment factory state, the main bolt 20 and the sub-bolt 30 are respectively located in the first main bolt hole 13 and the sub-bolt hole 14. At this time, the main electromagnetic circuit and the sub-electromagnetic circuit are in the connected state. The sub-bolt 30 can be normally pulled out. After the sub-bolt 30 is pulled out from the sub-bolt hole 14, the door lock component of the oven door can be normally unlocked.

[0046] When the sub-bolt 30 is pulled out from the sub-bolt hole 14, the one end of the upper spring plate 152 of the sub-switch component 19 located below the sub-bolt hole 14 is not pressed by the head of the sub-bolt 30. Under the resetting action of the compression elastic member 154 of the sub-switch component 19, the upper spring plate 152 of the sub-switch component 19 can be rotated to the initial position in the counterclockwise direction relative to the sub-partition plate 163. At this time, the upper contact 1522 of the sub-switch component 19 is disconnected with the lower contact 1532 of the sub-switch component 19, like Figure 5As shown, at this time, the sub electromagnetic circuit is disconnected. When the sub electromagnetic circuit is disconnected, the electromagnet 172 of the first main electromagnetic limiting component 17 loses power and disconnects the adsorption of the armature 1732 of the limiting pin 173 of the first main electromagnetic limiting component 17. Under the resetting action of the tensile elastic member 175 of the first main electromagnetic limiting component 17, the limiting pin 173 of the first main electromagnetic limiting component 17 can rotate to the initial position along the clockwise direction relative to the connecting rod 174 of the first main electromagnetic limiting component 17. At this time, the limiting pin 173 of the first main electromagnetic limiting component 17 is located in the limiting position. The first end of the limiting pin 173 of the first main electromagnetic limiting component 17 passes through the first main limiting hole 132 and is clamped with the recessed position 22 of the main plug pin 20. Thus, the main plug pin 20 can be blocked from being pulled out of the first main plug pin hole 13 through the limiting pin 173 of the first main electromagnetic limiting component 17. The main plug pin 20 cannot be pulled out of the first main plug pin hole 13. When the main plug pin 20 cannot be pulled out of the first main plug pin hole 13, it indicates that the sub plug pin 30 is in a state of unlocking the door lock assembly of the oven door, and the oven door is not closed.

[0047] When the door lock assembly of the oven door is locked through the sub plug pin 30, the sub plug pin 30 can be inserted into the sub plug pin hole 14. During the insertion of the sub plug pin 30, the head of the sub plug pin 30 will extend into the sub plug pin box 12 and press down the one end of the upper spring piece 152 of the sub switch assembly 19 below the sub plug pin hole 14, so that the upper contact 1522 of the sub switch assembly 19 is in contact with the lower contact 1532 of the sub switch assembly 19, as shown in the figure. Figure 4 As shown, at this time, the sub electromagnetic circuit is connected. During the pressing down of the one end of the upper spring piece 152 of the sub switch assembly 19 below the sub plug pin hole 14, the upper spring piece 152 of the sub switch assembly 19 can rotate along the clockwise direction relative to the sub partition plate 163, and at the same time, the compression elastic member 154 of the sub switch assembly 19 is compressed. When the sub electromagnetic circuit is connected, the electromagnet 172 of the first main electromagnetic limiting component 17 is powered and adsorbs the armature 1732 of the limiting pin 173 of the first main electromagnetic limiting component 17. During the adsorption, the limiting pin 173 of the first main electromagnetic limiting component 17 can rotate along the counterclockwise direction relative to the connecting rod 174 of the first main electromagnetic limiting component 17. When the electromagnet 172 of the first main electromagnetic limiting component 17 and the armature 1732 of the limiting pin 173 of the first main electromagnetic limiting component 17 are adsorbed together, the limiting pin 173 of the first main electromagnetic limiting component 17 is located in the retracted position. At this time, the first end of the limiting pin 173 of the first main electromagnetic limiting component 17 is located in the first main limiting hole 132, and the tensile elastic member 175 of the first main electromagnetic limiting component 17 is in the tensile state, as shown in the figure. Figure 3As shown, since the first end of the limiting pin 173 of the first main electromagnetic limiting assembly 17 is not engaged with the recess 22 of the main bolt 20, the main bolt 20 can be pulled out of the first main bolt hole 13. When the main bolt 20 can be pulled out of the first main bolt hole 13, it indicates that the door lock assembly of the oven door has been locked by the sub-bolt 30, and the oven door has been closed.

[0048] During the process of pulling out the main bolt 20, the end of the upper spring plate 152 of the first main switch assembly 15 below the first main bolt hole 13 is not pressed by the head of the main bolt 20, and under the restoring action of the compression elastic member 154 of the first main switch assembly 15, the upper spring plate 152 of the first main switch assembly 15 can rotate counterclockwise to the initial position relative to the first main partition plate 162. At this time, the upper contact 1522 of the first main switch assembly 15 is disconnected with the lower contact 1532 of the first main switch assembly 15, and the main electromagnetic circuit is disconnected. When the main electromagnetic circuit is disconnected, the electromagnet 172 of the sub-electromagnetic limiting assembly 18 loses power and disconnects the adsorption of the armature 1732 of the limiting pin 173 of the sub-electromagnetic limiting assembly 18. Under the restoring action of the tensile elastic member 175 of the sub-electromagnetic limiting assembly 18, the limiting pin 173 of the sub-electromagnetic limiting assembly 18 can rotate clockwise to the initial position relative to the connecting rod 174 of the sub-electromagnetic limiting assembly 18. At this time, the limiting pin 173 of the sub-electromagnetic limiting assembly 18 is located in the limiting position, the first end of the limiting pin 173 of the sub-electromagnetic limiting assembly 18 passes through the sub-limiting hole 142 and is engaged with the recess 32 of the sub-bolt 30. Thus, the sub-bolt 30 can be blocked from being pulled out of the sub-bolt hole 14 by the limiting pin 173, and the sub-bolt 30 cannot be pulled out of the sub-bolt hole 14. In this way, the sub-bolt 30 cannot unlock the door lock assembly of the oven door, ensuring safe production.

[0049] When the main bolt 20 is inserted into the first main bolt hole 13, the head of the main bolt 20 will extend into the sub-bolt box 12 and press the end of the upper spring plate 152 of the first main switch assembly 15 below the first main bolt hole 13, so that the upper contact 1522 of the first main switch assembly 15 is connected with the lower contact 1532 of the first main switch assembly 15, and the main electromagnetic circuit is connected. Figure 2As shown, at this time, the main electromagnetic circuit is connected, and in the process of pressing the lower end of the upper elastic sheet 152 of the first main switch assembly 15 below the first main bolt hole 13, the upper elastic sheet 152 of the first main switch assembly 15 can rotate in the clockwise direction relative to the first main partition 162, and the compression elastic piece 154 of the first main switch assembly 15 is compressed. When the main electromagnetic circuit is connected, the electromagnet 172 of the sub-electromagnetic limiting assembly 18 is powered and can attract the armature 1732 of the limiting pin 173 of the sub-electromagnetic limiting assembly 18, and in the process of attraction, the limiting pin 173 of the sub-electromagnetic limiting assembly 18 can rotate in the counterclockwise direction relative to the connecting rod 174 of the sub-electromagnetic limiting assembly 18. When the electromagnet 172 of the sub-electromagnetic limiting assembly 18 and the armature 1732 of the limiting pin 173 of the sub-electromagnetic limiting assembly 18 are attracted together, the limiting pin 173 of the sub-electromagnetic limiting assembly 18 is in the retracted position, and at this time, the first end of the limiting pin 173 of the sub-electromagnetic limiting assembly 18 is located in the sub-limiting hole 142, and the tensile elastic piece 175 of the sub-electromagnetic limiting assembly 18 is in a tensile state, as shown in Figure 5 As shown, since the first end of the limiting pin 173 of the sub-electromagnetic limiting assembly 18 is not clamped with the recessed position 32 of the sub-bolt 30, the sub-bolt 30 can be pulled out of the sub-bolt hole 14, and at this time, the oven door can be unlocked through the sub-bolt 30.

[0050] In this embodiment, the main bolt 20 is one, the number of the first main bolt hole 13, the first main switch assembly 15, and the first main electromagnetic limiting assembly 17 corresponds to the number of the main bolt 20, and is also one. The sub-bolt 30 is multiple, for example, six, and the number of the sub-bolt hole 14, the sub-electromagnetic limiting assembly 18, and the sub-switch assembly 19 corresponds to the number of the sub-bolt 30, and is also six, so that this embodiment can realize unified management of the sub-bolt 30 of multiple ovens. The six sub-switch assemblies 19 are connected in series, and the six sub-switch assemblies 19 and the positive and negative poles of the power supply form a sub-electromagnetic circuit, and the electromagnets 172 of the six sub-electromagnetic limiting assemblies 18 are connected in parallel, as shown in Figure 6 As shown, when the main bolt 20 is inserted into the first main bolt hole 13, all the sub-bolts 30 can be normally inserted or pulled out, and when one of the sub-bolts 30 is not inserted into the sub-bolt hole 14, the main bolt 20 cannot be pulled out of the first main bolt hole 13.

[0051] It can be understood that the sizes of the six sub-bolts 30 can be the same or different. In order to facilitate the distinction and facilitate the on-site operation of the operator, each sub-bolt 30 and each sub-bolt hole 14 can be designed to be different colors, and the size and color of each sub-bolt 30 are matched with the size and color of the corresponding sub-bolt hole 14, and each sub-bolt 30 and each sub-bolt hole 14 can also be numbered, for example, sub-bolt 1, sub-bolt 2,..., sub-bolt 6, and the number of each sub-bolt hole 14 corresponds to the number of the corresponding sub-bolt 30.

[0052] The sub plug 30 can also be one, two, or other numbers.

[0053] It can be understood that the main plug 20 can also be multiple, for example, four, and the number of the first main plug hole 13, the first main switch assembly 15, and the first main electromagnetic limiting assembly 17 is also multiple. The multiple first main switch assemblies 15 are connected in series, the multiple first main switch assemblies 15 form a main electromagnetic loop with the positive and negative poles of the power supply, and the electromagnets 172 of the multiple first main electromagnetic limiting assemblies 17 are connected in parallel. When the main plug 20 is multiple, the sub plug 30 can be normally inserted or pulled out only after all the main plugs 20 are respectively inserted into the corresponding first main plug holes 13. When one of the main plugs 20 is not inserted into the corresponding first main plug hole 13, the sub plug 30 cannot be inserted into or pulled out of the corresponding sub plug hole 14.

[0054] In order to distinguish and facilitate on-site operation of the operator, each main plug 20 and each first main plug hole 13 can be designed to be different in color. The size and color of each main plug 20 are matched with the size and color of the corresponding first main plug hole 13. Each main plug 20 and each first main plug hole 13 can also be numbered, for example, main plug 1, main plug 2,..., and main plug 4. The number of each first main plug hole 13 corresponds to the number of the corresponding main plug 20.

[0055] The number of the main plug 20, the sub plug 30, the first main plug hole 13, the first main switch assembly 15, the first main electromagnetic limiting assembly 17, the sub plug hole 14, the sub electromagnetic limiting assembly 18, and the sub switch assembly 19 can be set according to actual conditions.

[0056] In combination Figures 7 to 10 As shown in the drawings, the main key management device 40 includes a main plug box 42, a second main switch assembly 45, and a second main electromagnetic limiting assembly 46. The top end of the main plug box 42 is provided with a second main plug hole 43 for inserting the main plug 20, and the second main plug hole 43 is in communication with the inside of the main plug box 42. The bottom of the second main plug hole 43 is provided with a through hole in communication with the inside of the main plug box 42. When the main plug 20 is inserted into the second main plug hole 43, the head of the main plug 20 can extend into the main plug box 42 through the through hole at the bottom of the second main plug hole 43.

[0057] The second main switch assembly 45 is arranged in the main latch box 42 below the second main latch hole 43. The second main electromagnetic limiting assembly 46 is arranged in the main latch box 42 at one side of the second main latch hole 43. The second main switch assembly 45 is mechanically structured, preferably a contact switch, same as the first main switch assembly 15 and the sub switch assembly 19. The second main electromagnetic limiting assembly 46 is structured same as the first main electromagnetic limiting assembly 17 and the sub electromagnetic limiting assembly 18.

[0058] The second main switch assembly 45 is connected between the PLC controller and the negative pole of the power supply, and forms a main electromagnetic loop with the PLC controller and the negative pole of the power supply. The second main switch assembly 45 is used to turn on the main electromagnetic loop and output a conductive signal to the PLC controller when the main latch 20 is inserted into the second main latch hole 43, and is used to turn off the main electromagnetic loop when the main latch 20 is pulled out of the second main latch hole 43. The PLC controller is used to control the start of the oven to perform heating and drying work when receiving the conductive signal, so that the pole pieces located in the oven box can be heated and dried through the oven.

[0059] The second main electromagnetic limiting assembly 46 is connected between the PLC controller and the negative pole of the power supply, and forms a secondary electromagnetic loop with the PLC controller and the negative pole of the power supply. The PLC controller is used to control the secondary electromagnetic loop to be turned off when receiving the conductive signal, and is used to control the secondary electromagnetic loop to be turned on. The second main electromagnetic limiting assembly 46 is used to lose power and be located in the limiting position when the secondary electromagnetic loop is turned off, so as to block the main latch 20 from being pulled out of the second main latch hole 43, and is used to be powered on and be located in the retracted position when the secondary electromagnetic loop is turned on, so that the main latch 20 can be pulled out of the second main latch hole 43.

[0060] Specifically, the second main partition plate 44 is arranged in the main plug box 42 and located at one side of the second main plug hole 43, one end of the second main partition plate 44 is arranged at the top of the main plug box 42, and the other end is towards the bottom of the main plug box 42. One end of the upper spring 152 of the second main switch assembly 45 is rotatably arranged to the second main partition plate 44 through a rotating shaft and connected with the PLC controller, and the other end is located below the second main plug hole 43 and forms an upper contact 1522. The lower spring 153 of the second main switch assembly 45 is arranged at the bottom of the main plug box 42 and located below the upper spring 152 of the second main switch assembly 45, one end of the lower spring 153 of the second main switch assembly 45 is connected with the bottom end of the second main partition plate 44 and connected with the negative electrode of the power supply, and the other end forms a lower contact 1532. The upper spring 152 and the lower spring 153 of the second main switch assembly 45 form a total electromagnetic loop with the PLC controller and the negative electrode of the power supply, the upper contact 1522 of the second main switch assembly 45 and the lower contact 1532 of the second main switch assembly 45 are used to contact and conduct when the main plug 20 is inserted into the second main plug hole 43, so as to realize the connection of the total electromagnetic loop and output the conductive signal to the PLC controller, and are used to disconnect the contact when the main plug 20 is pulled out of the second main plug hole 43, so as to realize the disconnection of the total electromagnetic loop. In actual application, when the main plug 20 is inserted into the second main plug hole 43, the head of the main plug 20 can extend into the main plug box 42 and press the end of the upper spring 152 where the upper contact 1522 is arranged, so that the upper contact 1522 is in contact with the lower contact 1532.

[0061] The limiting pin 173 of the second main electromagnetic limiting assembly 46 is located between the electromagnet 172 of the second main electromagnetic limiting assembly 46 and the second main plug hole 43. The electromagnet 172 of the second main electromagnetic limiting assembly 46 is connected between the PLC controller and the negative electrode of the power supply, and forms a secondary electromagnetic loop with the PLC controller and the negative electrode of the power supply. The PLC controller is used to control the disconnection of the secondary electromagnetic loop in the form of outputting low voltage when receiving the conductive signal, and is used to control the connection of the secondary electromagnetic loop in the form of outputting high voltage. The electromagnet 172 of the second main electromagnetic limiting assembly 46 is used to lose power and disconnect the adsorption of the armature 1732 of the limiting pin 173 of the second main electromagnetic limiting assembly 46 when the secondary electromagnetic loop is disconnected, so that the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located in the limiting position, so that the main plug 20 can be prevented from being pulled out of the second main plug hole 43 by the limiting pin 173 of the second main electromagnetic limiting assembly 46, and is used to get power and adsorb the armature 1732 of the limiting pin 173 of the second main electromagnetic limiting assembly 46 when the secondary electromagnetic loop is connected, so that the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located in the retracted position, so that the main plug 20 can be pulled out of the second main plug hole 43.

[0062] The inner wall of the second main plug hole 43 is provided with a second main limiting hole 432, when the limiting pin 173 of the second main electromagnetic limiting assembly 46 is in the retracted position, the first end of the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located in the second main limiting hole 432, when the limiting pin 173 of the second main electromagnetic limiting assembly 46 is in the limiting position, the first end of the limiting pin 173 of the second main electromagnetic limiting assembly 46 passes through the second main limiting hole 432 and is clamped with the recessed position 22 of the main plug 20.

[0063] One end of the connecting rod 174 of the second main electromagnetic limiting assembly 46 is arranged to the second main partition plate 44, and the other end faces the second main plug hole 43. The tensile elastic member 175 of the second main electromagnetic limiting assembly 46 is connected between the second main partition plate 44 and the second end of the limiting pin 463 of the second main electromagnetic limiting assembly 46.

[0064] Through the above structure, after the main plug 20 is pulled out from the first main plug hole 13 and before the main plug 20 is inserted into the second main plug hole 43, the secondary electromagnetic circuit is connected by the PLC controller at this time, the electromagnet 172 of the second main electromagnetic limiting assembly 46 is powered and adsorbs the armature 1732 of the limiting pin 173 of the second main electromagnetic limiting assembly 46, so that the limiting pin 173 of the second main electromagnetic limiting assembly 46 is in the retracted position, when the limiting pin 173 of the second main electromagnetic limiting assembly 46 is in the retracted position, the first end of the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located in the second main limiting hole 432, at this time, the main plug 20 can be inserted into the second main plug hole 43. During the process of inserting the main plug 20 into the second main plug hole 43, the head of the main plug 20 will extend into the main plug box 42 and press down the one end of the upper spring 152 of the second main switch assembly 45 located below the second main plug hole 43, so that the upper contact 1522 of the second main switch assembly 45 is in contact with the lower contact 1532 of the second main switch assembly, as shown in the figure, at this time, the total electromagnetic circuit is connected and outputs a signal to the PLC controller, the PLC controller can send a prompt to the display, for example, that the oven door is closed, or other sound prompts, etc. Figure 8 During the process of pressing down the one end of the upper spring 152 of the second main switch assembly 45 located below the second main plug hole 43, the upper spring 152 of the second main switch assembly 45 can rotate in the clockwise direction relative to the second main partition plate 44, and at the same time, the compression elastic member 154 of the second main switch assembly 45 is compressed.

[0065] After receiving the conduction signal, the PLC controller controls the secondary electromagnetic circuit to be disconnected, and controls the oven to start heating and drying. After the secondary electromagnetic circuit is disconnected, the electromagnet 172 of the second main electromagnetic limit assembly 46 loses power and disconnects the adsorption of the armature 1732 of the limit pin 173 of the second main electromagnetic limit assembly 46. Under the reset action of the tensile elastic member 175 of the second main electromagnetic limit assembly 46, the limit pin 173 of the second main electromagnetic limit assembly 46 can be relatively connected to the second main electromagnetic limit assembly 46. When the rod 174 rotates clockwise to its initial position, the limit pin 173 of the second main electromagnetic limit assembly 46 is in the limit position. The first end of the limit pin 173 of the second main electromagnetic limit assembly 46 passes through the second main limit hole 432 and engages with the recess 22 of the main latch 20. In this way, the limit pin 173 of the second main electromagnetic limit assembly 46 can prevent the main latch 20 from being pulled out of the second main latch hole 43. The main latch 20 cannot be pulled out of the second main latch hole 43, thereby ensuring safe production.

[0066] When the oven is in the heating and drying operation and the interior of the oven is at a high temperature, the PLC controller controls the secondary electromagnetic circuit to be disconnected, so that the main latch 20 cannot be pulled out from the second main latch hole 43, and thus the sub-latch 30 cannot be pulled out from the sub-latch hole 14. When the oven has finished working or the door is allowed to be opened, the PLC controller controls the secondary electromagnetic circuit to be connected, and the electromagnet 172 of the second main electromagnetic limit assembly 46 is energized and can adsorb the armature 1732 of the limit pin 173 of the second main electromagnetic limit assembly 46. During the adsorption process, the limit pin 173 of the second main electromagnetic limit assembly 46 can rotate counterclockwise relative to the connecting rod 174 of the second main electromagnetic limit assembly 46. When the electromagnet 172 of the second main electromagnetic limit assembly 46 and the armature 1732 of the limit pin 173 of the second main electromagnetic limit assembly 46 are adsorbed together, the limit pin 173 of the second main electromagnetic limit assembly 46 is in the retracted position. At this time, the first end of the limit pin 173 of the second main electromagnetic limit assembly 46 is located in the second main limit hole 432, and the tensile elastic member 175 of the second main electromagnetic limit assembly 46 is in a stretched state. Figure 9 As shown, since the first end of the limit pin 173 of the second main electromagnetic limit assembly 46 is not engaged with the recess 22 of the main latch 20, the main latch 20 can be pulled out from the second main latch hole 43. Then, the main latch 20 is inserted into the first main latch hole 13, and the sub-latch 30 can be pulled out from the sub-latch hole 14. After the sub-latch 30 is pulled out, the door lock assembly of the oven can be unlocked, so that the oven door can be opened.

[0067] After the main plug 20 is pulled out from the second main plug hole 43, the end of the upper spring 152 of the second main switch assembly 45 below the second main plug hole 43 is not pressed by the head of the main plug 20, and under the restoring force of the compression spring 154 of the second main switch assembly 45, the upper spring 152 of the second main switch assembly 45 rotates counterclockwise relative to the second main partition 44 to the initial position, at which time the upper contact 1522 of the second main switch assembly 45 is disconnected from the lower contact 1532 of the second main switch assembly 45, and at this time the total electromagnetic circuit is disconnected.

[0068] The number of the second main plug hole 43, the second main switch assembly 45, and the second main electromagnetic limiting assembly 46 corresponds to the number of the main plug 20. The size, shape, and color of the second main plug hole 43 correspond to the size, shape, and color of the main plug 20. When the main plug 20 has multiple, for example, four, the four second main switch assemblies 45 are connected in series, the four second main switch assemblies 45 form a total electromagnetic circuit with the PLC controller and the negative pole of the power supply, and the second main electromagnets 462 of the four second main electromagnetic limiting assemblies 46 are connected in parallel. After the four main plugs 20 are respectively inserted into the corresponding second main plug holes 43, the total electromagnetic circuit is connected and outputs a signal to the PLC controller.

[0069] The sub-key management device 10, the main key management device 40, the power supply, and the PLC controller of the present application can be arranged in a total control cabinet. The sub plug box 12 and the main plug box 42 are each provided with a wire passing hole, and the wires connecting the coils 1723 of the electromagnets 172 in the sub plug box 12 to the positive pole and the negative pole of the power supply can pass through the wire passing hole of the sub plug box 12. The wires connecting the coils 1723 of the electromagnets 172 in the main plug box 42 to the PLC controller and the negative pole of the power supply can pass through the wire passing hole of the main plug box 42.

[0070] In an alternative, as shown in Figure 11 , Figure 12 and Figure 14 , the first main switch assembly 15 and the sub switch assembly 19 are both inductive switches, and the inductive switch is an electromagnetic induction switch. The inductive switch can also be other, for example, a capacitive proximity switch, and in this case the material of the main plug 20 and the sub plug 30 is metal.

[0071] Specifically, the first main switch assembly 15 and the sub switch assembly 19 each include a main inductive coil 133 and a secondary inductive coil 23. The secondary inductive coil 23 corresponds to the primary coil of a transformer, and the main inductive coil 133 corresponds to the secondary coil of a transformer.

[0072] In the first main switch assembly 15, the secondary induction coil 23 is arranged at the bottom end of the main plug 20, and the primary induction coil 133 is arranged at the bottom of the first main plug hole 13. The primary induction coil 133 is connected between the PLC controller and the negative pole of the power supply, and forms a main path with the PLC controller and the negative pole of the power supply. When the main plug 20 is inserted into the first main plug hole 13, the secondary induction coil 23 is coupled with the primary induction coil 133 and outputs a conduction signal to the PLC controller, which is a current signal generated by the coupling of the secondary induction coil 23 and the primary induction coil 133. The coil 1723 of the electromagnet 172 of the sub-electromagnetic limiting assembly 18 is connected between the PLC controller and the negative pole of the power supply, and forms a main electromagnetic loop with the PLC controller and the negative pole of the power supply. When the PLC controller receives the conduction signal, the PLC controller controls the main electromagnetic loop to be turned on in a manner such as outputting a high level, so that the electromagnet 172 of the sub-electromagnetic limiting assembly 18 is powered on, and the armature 1732 of the limiting pin 173 is attracted to make the limiting pin 173 located at the retracted position.

[0073] In the sub switch assembly 19, the primary induction coil 23 is arranged at the bottom end of the sub plug 30, and the secondary induction coil 133 is arranged at the bottom of the sub plug hole 14. The secondary induction coil 133 is connected between the PLC controller and the negative pole of the power supply, and forms a sub path with the PLC controller and the negative pole of the power supply. When the sub plug 30 is inserted into the sub plug hole 14, the secondary induction coil 23 is coupled with the primary induction coil 133 and outputs a conduction signal to the PLC controller, which is a current signal generated by the coupling of the secondary induction coil 23 and the primary induction coil 133. The coil 1723 of the electromagnet 172 of the first main electromagnetic limiting assembly 17 is connected between the PLC controller and the negative pole of the power supply, and forms a sub electromagnetic loop with the PLC controller and the negative pole of the power supply. When the PLC controller receives the conduction signal, the PLC controller controls the sub electromagnetic loop to be turned on in a manner such as outputting a high level, so that the electromagnet 172 of the first main electromagnetic limiting assembly 17 is powered on, and the armature 1732 of the limiting pin 173 is attracted to make the limiting pin 173 located at the retracted position.

[0074] In actual application, when the sub plug 30 is pulled out from the sub plug hole 14, no current signal is generated between the secondary induction coil 23 of the sub switch assembly 19 and the primary induction coil 133, and the PLC controller controls the sub electromagnetic circuit to be disconnected. When the sub electromagnetic circuit is disconnected, the electromagnet 172 of the first primary electromagnetic limiting assembly 17 loses power and disconnects the attraction to the armature 1732 of the limiting pin 173 of the first primary electromagnetic limiting assembly 17. Under the resetting action of the tensile elastic member 175 of the first primary electromagnetic limiting assembly 17, the limiting pin 173 of the first primary electromagnetic limiting assembly 17 can rotate in the clockwise direction relative to the connecting rod 174 of the first primary electromagnetic limiting assembly 17 to the initial position. At this time, the limiting pin 173 of the first primary electromagnetic limiting assembly 17 is located in the limiting position, and the first end of the limiting pin 173 of the first primary electromagnetic limiting assembly 17 passes through the first primary limiting hole 132 and is clamped with the recessed position 22 of the main plug 20. Thus, the main plug 20 can be prevented from being pulled out from the first main plug hole 13 through the limiting pin 173 of the first primary electromagnetic limiting assembly 17, and the main plug 20 cannot be pulled out from the first main plug hole 13. When the main plug 20 cannot be pulled out from the first main plug hole 13, it indicates that the sub plug 30 is in the state of unlocking the door lock assembly of the oven door, and the oven door is not closed.

[0075] When the door lock assembly of the oven door is locked through the sub plug 30, the sub plug 30 is inserted into the sub plug hole 14. When the sub plug 30 is inserted, the secondary induction coil 23 of the sub switch assembly 19 is coupled with the primary induction coil 133 and outputs a conduction signal to the PLC controller. After receiving the conduction signal, the PLC controller controls the sub electromagnetic circuit to be connected. When the sub electromagnetic circuit is connected, the electromagnet 172 of the first primary electromagnetic limiting assembly 17 is powered and attracts the armature 1732 of the limiting pin 173 of the first primary electromagnetic limiting assembly 17. During the attraction, the limiting pin 173 of the first primary electromagnetic limiting assembly 17 can rotate in the counterclockwise direction relative to the connecting rod 174 of the first primary electromagnetic limiting assembly 17. When the electromagnet 172 of the first primary electromagnetic limiting assembly 17 and the armature 1732 of the limiting pin 173 of the first primary electromagnetic limiting assembly 17 are attracted together, the limiting pin 173 of the first primary electromagnetic limiting assembly 17 is located in the retracted position. At this time, the first end of the limiting pin 173 of the first primary electromagnetic limiting assembly 17 is located in the first primary limiting hole 132, and the tensile elastic member 175 of the first primary electromagnetic limiting assembly 17 is in the tensile state, as shown in FIG. 6. Since the first end of the limiting pin 173 of the first primary electromagnetic limiting assembly 17 is not clamped with the recessed position 22 of the main plug 20, the main plug 20 can be pulled out from the first main plug hole 13. When the main plug 20 can be pulled out from the first main plug hole 13, it indicates that the door lock assembly of the oven door has been locked through the sub plug 30, and the oven door is closed. Figure 3

[0076] ​In the process of pulling out the main plug 20, no current signal is generated between the secondary induction coil 23 of the first main switch assembly 15 and the main induction coil 133, and the PLC controller main electromagnetic loop is disconnected. When the main electromagnetic loop is disconnected, the electromagnet 172 of the sub-electromagnetic limiting assembly 18 loses power and disconnects the adsorption of the armature 1732 of the limiting pin 173 of the sub-electromagnetic limiting assembly 18. Under the resetting action of the stretching elastic member 175 of the sub-electromagnetic limiting assembly 18, the limiting pin 173 of the sub-electromagnetic limiting assembly 18 can rotate to the initial position along the clockwise direction relative to the connecting rod 174 of the sub-electromagnetic limiting assembly 18. At this time, the limiting pin 173 of the sub-electromagnetic limiting assembly 18 is located in the limiting position, the first end of the limiting pin 173 of the sub-electromagnetic limiting assembly 18 passes through the sub-limiting hole 142 and is clamped with the recessed position 32 of the sub plug 30. Thus, the sub plug 30 cannot be pulled out of the sub plug hole 14, and the sub plug 30 cannot be pulled out of the sub plug hole 14. Thus, the sub plug 30 cannot be used to unlock the door lock assembly of the oven door, ensuring safe production.

[0077] When the main plug 20 is inserted into the first main plug hole 13, the secondary induction coil 23 of the first main switch assembly 15 is coupled with the main induction coil 133 and outputs a conduction signal to the PLC controller. After receiving the conduction signal, the PLC controller controls the main electromagnetic loop to be connected. When the main electromagnetic loop is connected, the electromagnet 172 of the sub-electromagnetic limiting assembly 18 is powered on and can adsorb the armature 1732 of the limiting pin 173 of the sub-electromagnetic limiting assembly 18. During the adsorption, the limiting pin 173 of the sub-electromagnetic limiting assembly 18 can rotate along the counterclockwise direction relative to the connecting rod 174 of the sub-electromagnetic limiting assembly 18. When the electromagnet 172 of the sub-electromagnetic limiting assembly 18 and the armature 1732 of the limiting pin 173 of the sub-electromagnetic limiting assembly 18 are adsorbed together, the limiting pin 173 of the sub-electromagnetic limiting assembly 18 is located in the retracted position. At this time, the first end of the limiting pin 173 of the sub-electromagnetic limiting assembly 18 is located in the sub-limiting hole 142, and the stretching elastic member 175 of the sub-electromagnetic limiting assembly 18 is in a stretched state, as shown in FIG. 8. Since the first end of the limiting pin 173 of the sub-electromagnetic limiting assembly 18 is not clamped with the recessed position 32 of the sub plug 30, the sub plug 30 can be pulled out of the sub plug hole 14. At this time, the sub plug 30 can be used to unlock the oven door. Figure 5

[0078] In this scheme, when the sub switch assembly 19 is six, the main induction coils 133 of the six sub switch assemblies 19 are connected in parallel. The main induction coil 133 of each sub switch assembly 19 forms a sub path with the negative electrode of the PLC controller and the power supply, and the electromagnets 172 of the sub-electromagnetic limiting assemblies 18 are connected in parallel. Each sub-electromagnetic limiting assembly 18 forms a main electromagnetic loop with the PLC controller and the negative electrode of the power supply.

[0079] ​It can be understood that when the first main switch assembly 15 is a mechanical switch, the type of the sub switch assembly 19 can be the same as or different from that of the first main switch assembly 15.

[0080] As shown in FIGS. 1, 2 and 3, the first main switch assembly 15 is a mechanical switch. Figure 13 and Figure 14 As shown in FIGS. 1, 2 and 3, the first main switch assembly 15 is a mechanical switch.

[0081] Specifically, the second main switch assembly 45 includes a main induction coil 133 and a sub induction coil 23. The sub induction coil 23 is equivalent to a primary coil of a transformer, and the main induction coil 133 is equivalent to a secondary coil of the transformer.

[0082] In the second main switch assembly 45, the sub induction coil 23 is arranged at the bottom end of the body of the main plug 20, and the main induction coil 133 is arranged at the bottom of the second main plug hole 43. The main induction coil 133 is connected between the PLC controller and the negative pole of the power supply, and forms a total electromagnetic loop with the PLC controller and the negative pole of the power supply.

[0083] In actual application, after the main latch 20 is pulled out from the first main latch hole 13 and before the main latch 20 is inserted into the second main latch hole 43, the secondary electromagnetic circuit is first controlled to be turned on through the PLC controller. At this time, the electromagnet 172 of the second main electromagnetic limit assembly 46 is energized and adsorbs the armature 1732 of the limit pin 173 of the second main electromagnetic limit assembly 46, so that the limit pin 173 of the second main electromagnetic limit assembly 46 is located in the retracted position. When the limit pin 173 of the second main electromagnetic limit assembly 46 is located in the retracted position, the first end of the limit pin 173 of the second main electromagnetic limit assembly 46 is located in the second main limit hole 432. At this time, the main latch 20 can be inserted into the second main latch hole 43. When the main latch 20 is inserted into the second main latch hole 43, the secondary induction coil 23 couples with the main induction coil 133 and outputs a conduction signal to the PLC controller. The conduction signal is a current signal generated by the coupling of the secondary induction coil 23 and the main induction coil 133. When the PLC controller receives the conduction signal, the PLC controller can send a prompt to, for example, a display that the oven door is closed, or other prompts such as sound prompts. At the same time, the PLC controller controls the secondary electromagnetic circuit to disconnect, for example, by outputting a low level, and controls the start of the oven to perform heating and drying. After the secondary electromagnetic circuit is disconnected, the electromagnet 172 of the second main electromagnetic limit assembly 46 loses power and disconnects the adsorption of the armature 1732 of the limit pin 173 of the second main electromagnetic limit assembly 46. Under the reset action of the tensile elastic member 175 of the second main electromagnetic limit assembly 46, the limit pin 173 of the second main electromagnetic limit assembly 46 can be relative to the second main electromagnetic limit assembly 46. When the connecting rod 174 rotates clockwise to its initial position, the limiting pin 173 of the second main electromagnetic limiting assembly 46 is at the limiting position. The first end of the limiting pin 173 of the second main electromagnetic limiting assembly 46 passes through the second main limiting hole 432 and engages with the recess 22 of the main latch 20. In this way, the limiting pin 173 of the second main electromagnetic limiting assembly 46 can prevent the main latch 20 from being pulled out of the second main latch hole 43. The main latch 20 cannot be pulled out of the second main latch hole 43, thereby ensuring safe production.

[0084] In this solution, when there are multiple main plugs 20, for example four, the main induction coils 133 of the four second main switch components 45 are connected in parallel. The main induction coil 133 of each second main switch component 45 forms a total electromagnetic circuit with the PLC controller and the negative pole of the power supply.

[0085] The sub-key management device 10 and the main plug 20 can realize intelligent management of the sub plug 30, save time and effort, and are convenient to operate, without the need for centralized management by manual operation. The main key management device 40, the power supply and the PLC controller can realize intelligent management of the main plug 20, save time and effort, and are convenient to operate. The sub plug 30, the main plug 20, the sub-key management device 10, the main key management device 40, the power supply and the controller are combined together, so that the opening and closing states of the oven door can be monitored, the safety production of the oven is ensured, and the structure is simplified, the operation is convenient, and the cable in the production area is reduced. The door lock assembly does not need to be connected with the controller through the cable, and the structure is simplified, the operation is convenient.

[0086] Please refer to Figure 15 The application further provides an oven device comprising an oven 60 and the oven key management system.

[0087] Combining Figure 16 and Figure 17 It is shown that the oven 60 comprises a cabinet 62 and a door lock assembly. The front of the cabinet 62 is provided with a door frame 622, and the door frame 622 is provided with a door 623. The door lock assembly is arranged on the door 623 and the door frame 622. The cabinet 62 is provided with a heating mechanism. The heating mechanism is connected with the PLC controller of the oven key management system. The heating mechanism can be controlled by the PLC controller to perform heating and drying work, so that the pole pieces located in the cabinet 62 can be heated and dried. The sub plug 30 of the oven key management system is used to unlock or lock the door lock assembly, so as to open or close the door 623.

[0088] The door lock assembly includes a fixing base 632, a handle 633, a buckle 634, a lower ejector pin 635, an upper ejector pin 636, and an ejector pin elastic member 637. The fixing base 632 is disposed within the through-hole of the door 623. The handle 633 is inserted into the mounting hole of the fixing base 632 and can rotate relative to the fixing base 632. An end cap 6335 is provided on the outer periphery of one end of the handle 633. The outer diameter of the end cap 6335 is larger than the inner diameter of the mounting hole of the fixing base 632. The end cap 6335 can limit the handle 633 to prevent it from being disengaged from the mounting hole of the fixing base 632. The other end of the handle 633 is formed with a hand grip 6332 to facilitate rotation of the handle 633. One end of the handle 633, forming the grip portion 6332, is provided with a lock hole 6334 for inserting the sub-latch 30 of the oven key management system. The lock hole 6334 extends through both ends of the handle 633, and its size and shape match those of the sub-latch 30. A first through-slot 6334a is defined on one side of the inner wall of the lock hole 6334, located above the lock hole 6334. A second through-slot 632a, communicating with the first through-slot 6334a, is defined on one side of the inner wall of the mounting hole. Lower ejector pin 635 is disposed within first slot 6334a, with its bottom end extending into lock hole 6334. Upper ejector pin 636 is disposed within second slot 632a, with its bottom end extending into first slot 6334a and contacting the top of lower ejector pin 635. Because upper ejector pin 636 is partially located within first slot 6334a, i.e., the contact surface between upper ejector pin 636 and lower ejector pin 635 is located below second slot 632a, upper ejector pin 636 can prevent handle 633 from rotating relative to fixed base 632. An ejector pin elastic member 637 is located within second slot 632a. A cover 638 is provided within the end of second slot 632a away from first slot 6334a. The ejector pin elastic member 637 is connected between upper ejector pin 636 and the cover 638. The ejector pin elastic member 637 is preferably a compression spring. The lower ejector pin 635 and the upper ejector pin 636 can move up and down along the first through-slot 6334a and the second through-slot 632a. When the contact surface between the lower ejector pin 635 and the upper ejector pin 636 is located between the first through-slot 6334a and the second through-slot 632a, the handle 633 is not blocked by the upper ejector pin 636 and can therefore rotate within the mounting hole of the fixing base 632. A fastener 6333 is provided on the outer periphery of the handle 633, which engages with the buckle 634.

[0089] A groove 33 is formed on the outer periphery of the head of the sub-latch 30 , and the bottom end of the lower ejector pin 635 is adapted to cooperate with the groove 33 of the sub-latch 30 .

[0090] The inner diameter of the first through slot 6334a gradually increases in the direction close to the second through slot 632a, the size and shape of the lower ejector pin 635 are matched with the size and shape of the first through slot 6334a, and the structure can clamp the lower ejector pin 635 to prevent the bottom end of the lower ejector pin 635 from contacting the other side inner wall of the lock hole 6334, thereby facilitating the insertion of the sub-latch 30. The size and shape of the upper ejector pin 636 are matched with the size and shape of the second through slot 632a.

[0091] Through the above structure, when the cabinet door 623 is to be opened, the sub-latch 30 is first pulled out from the sub-latch hole 14 of the sub-key management device 10, and then the sub-latch 30 is inserted into the lock hole 6334. During the insertion of the sub-latch 30 into the lock hole 6334, the sub-latch 30 will press the lower ejector pin 635 upwards, and the lower ejector pin 635 can move upwards under the pressing of the sub-latch 30 and push the upper ejector pin 636 to move upwards. The upward movement of the upper ejector pin 636 will compress the ejector spring 637, and when the bottom end of the lower ejector pin 635 cooperates with the groove 33 of the sub-latch 30, the contact surface of the upper ejector pin 636 and the lower ejector pin 635 is located between the first through slot 6334a and the second through slot 632a, as shown in FIG. 6C. At this time, the handle 633 can rotate in the mounting hole of the fixed seat 632 without being blocked by the upper ejector pin 636, and then the handle 633 is rotated to separate the fastener 6333 from the buckle 634, so that the cabinet door 623 can be opened. Figure 18

[0092] When the cabinet door 623 is to be closed, the handle 633 is first rotated to make the fastener 6333 cooperate with the buckle 634, and then the sub-latch 30 is pulled out from the lock hole 6334. During the pulling-out process of the sub-latch 30, the ejector spring 637 can push the upper ejector pin 636 to move downwards to the initial position under the reset action of the ejector spring 637, and the downward movement of the upper ejector pin 636 can push the lower ejector pin 635 to move downwards to the initial position, as shown in FIG. 6D. In this way, the cabinet door 623 can be closed. Figure 17

[0093] The oven key management system provided by the present application can realize intelligent management of the sub-latch 30 and the main latch 20, and can monitor the opening and closing state of the cabinet door 623, thereby ensuring the safe production of the oven 60. Compared with the prior art, the door lock assembly does not need to be connected with the controller through a cable, which can reduce the use of cables in the production area, simplify the structure, and facilitate the operation. The door lock assembly provided by the present application is convenient to open and close through the sub-latch 30, and the opening and closing of the cabinet door 623 is also convenient, which is flexible to use and greatly meets the use requirements.

[0094] ​​The above is a specific description of the preferred embodiment of the application, but the application is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. An oven key management system, characterized in that: The door lock assembly comprises a sub-latch for unlocking or locking the door lock assembly, a sub-key management device and a main latch, the sub-key management device comprising a sub-latch housing, a first main switch assembly and a sub-electromagnetic limit assembly, the top of the sub-latch housing is provided with a first main latch hole for inserting the main latch and a sub-latch hole for inserting the sub-latch, the first main switch assembly is used to connect the main electromagnetic circuit when the main latch is inserted into the first main latch hole, and to disconnect the main electromagnetic circuit when the main latch is pulled out of the first main latch hole, the sub-electromagnetic limit assembly is used to lose power when the main electromagnetic circuit is disconnected and be located in a limit position to prevent the sub-latch from being inserted into the sub-latch hole or preventing the sub-latch from being pulled out of the sub-latch hole. , and is used to be energized and located in a retracted position when the main electromagnetic circuit is connected so that the sub-latch can be inserted into the sub-latch hole or the sub-latch can be pulled out from the sub-latch hole; the sub-key management device also includes a sub-switch component and a first main electromagnetic limit component, the sub-switch component is used to connect the sub-electromagnetic circuit when the sub-latch is inserted into the sub-latch hole, and is used to disconnect the sub-electromagnetic circuit when the sub-latch is pulled out from the sub-latch hole, the first main electromagnetic limit component is used to lose power and be located in a limiting position to prevent the main latch from being pulled out from the first main latch hole when the sub-electromagnetic circuit is disconnected, and is used to be energized and located in a retracted position when the sub-electromagnetic circuit is connected so that the main latch can be pulled out from the first main latch hole.

2. The oven key management system according to claim 1, characterized in that: There are one or more main pins, and the number of the first main pin holes, the first main switch components, and the first main electromagnetic limiter components corresponds to the number of the main pins.

3. The oven key management system according to claim 1, characterized in that: There are one or more sub-pins, and the number of the sub-pin holes, sub-electromagnetic limit assemblies, and sub-switch assemblies corresponds to the number of the sub-pins.

4. The oven key management system according to claim 1, characterized in that: The first main switch component and the sub-switch component are mechanical switches or inductive switches.

5. The oven key management system according to claim 1, characterized in that: The sub-latch housing is provided with a first main partition plate and the first main electromagnetic limit assembly on one side of the first main latch hole, and a sub-partition plate and the sub-electromagnetic limit assembly are respectively provided on one side of the sub-latch hole. The sub-electromagnetic limit assembly and the first main electromagnetic limit assembly each include an electromagnet and a limit pin located on one side of the electromagnet. An armature is provided on a side of the limit pin proximate to the electromagnet, and one end of the electromagnet is opposite to the armature. In the sub-electromagnetic limit assembly, the limit pin is located between the electromagnet and the sub-latch hole, the end of the electromagnet away from the armature is set to the sub-partition, and the inner wall of the sub-latch hole is provided with a sub-limit hole. The electromagnet is used to lose power when the main electromagnetic circuit is disconnected and disconnect the adsorption of the armature of the limit pin so that the limit pin is located in the limit position, and to be energized when the main electromagnetic circuit is connected and adsorb the armature of the limit pin so that the limit pin is located in the retracted position. When the limit pin is in the retracted position, the first end of the limit pin is located in the sub-limit hole. When the limit pin is in the limit position, the first end of the limit pin passes through the sub-limit hole and engages with the concave position of the sub-latch or extends into the sub-latch hole. In the first main electromagnetic limit assembly, the limit pin is located between the electromagnet and the first main latch hole, the end of the electromagnet away from the armature is set to the first main partition, and the inner wall of the first main latch hole is provided with a first main limit hole. The electromagnet is used to lose power when the sub-electromagnetic circuit is disconnected and disconnect the adsorption of the armature of the limit pin so that the limit pin is located in the limit position, and is used to gain power when the sub-electromagnetic circuit is connected and adsorb the armature of the limit pin so that the limit pin is located in the retracted position. When the limit pin is in the retracted position, the first end of the limit pin is located in the first main limit hole. When the limit pin is in the limit position, the first end of the limit pin passes through the first main limit hole and engages with the concave position of the main latch.

6. The oven key management system according to claim 5, characterized in that: The sub-electromagnetic limiting assembly and the first main electromagnetic limiting assembly both include a connecting rod and a tensile elastic member; In the sub-electromagnetic limit assembly, one end of the connecting rod is set to the sub-partition, and the other end faces the sub-pin hole and is rotatably connected to the limit pin, and the tensile elastic member is connected between the second end of the limit pin and the sub-partition; In the first main electromagnetic limit assembly, one end of the connecting rod is set to the first main partition, and the other end faces the first main pin hole and is rotatably connected to the limit pin, and the tensile elastic member is connected between the second end of the limit pin and the first main partition.

7. The oven key management system according to claim 1, characterized in that: It also includes a master key management device, a power supply and a controller. The master key management device includes a master plug box and a second main switch assembly. The top of the main plug box is provided with a second master plug hole for inserting the main plug. The second main switch assembly is connected between the controller and the negative pole of the power supply, and forms a total electromagnetic circuit with the controller and the negative pole of the power supply. The second main switch assembly is used to connect the total electromagnetic circuit and output a conduction signal to the controller when the main plug is inserted into the second main plug hole, and to disconnect the total electromagnetic circuit when the main plug is pulled out of the second main plug hole. The controller is used to control the start of the oven to perform heating and drying work when receiving the conduction signal.

8. The oven key management system according to claim 7, characterized in that: A second main electromagnetic limit assembly is provided in the main latch housing on one side of the second main latch hole. The second main electromagnetic limit assembly is connected between the controller and the negative pole of the power supply, and forms a secondary electromagnetic circuit with the controller and the negative pole of the power supply. The controller is used to control the secondary electromagnetic circuit to be disconnected and to control the secondary electromagnetic circuit to be connected when receiving the conduction signal. The second main electromagnetic limit assembly is used to lose power and be located in a limiting position when the secondary electromagnetic circuit is disconnected to prevent the main latch from being pulled out of the second main latch hole, and to be powered and be located in a retracted position when the secondary electromagnetic circuit is connected to enable the main latch to be pulled out of the second main latch hole.

9. The oven key management system according to claim 8, characterized in that: The second main switch assembly is a mechanical switch or an inductive switch, and the structure of the second main electromagnetic limit assembly is the same as that of the sub-electromagnetic limit assembly.

10. An oven device, comprising an oven, characterized in that: It also includes an oven key management system according to any one of claims 1 to 9, wherein the oven includes a box body and a door lock assembly, a door frame is provided on the front of the box body, a box door is provided in an empty space of the door frame, the door lock assembly is arranged on the door frame and the box door, and the sub-latch of the oven key management system is used to unlock or lock the door lock assembly to open or close the box door.

11. The oven equipment according to claim 10, characterized in that: The door lock assembly includes a fixing seat, a handle, a lower ejector pin, an upper ejector pin, an ejector pin elastic member and a buckle. The fixing seat is arranged in the through hole of the box door, the handle is inserted into the mounting hole of the fixing seat and can rotate relative to the fixing seat, the handle is provided with a lock hole for inserting the sub-latch and a buckle, one side of the inner wall of the lock hole is provided with a first through groove, one side of the inner wall of the mounting hole is provided with a second through groove connected to the first through groove, the lower ejector pin is arranged in the first through groove and the bottom end of the lower ejector pin extends into the lock hole, the upper ejector pin is arranged in the second through groove The first and second through slots are connected, and the bottom end of the upper ejector pin extends into the first through slot and contacts the top end of the lower ejector pin. The ejector pin elastic member is located in the second through slot, and one end of the ejector pin elastic member is connected to the top end of the upper ejector pin, and the other end is arranged in the end of the second through slot away from the first through slot. The lower ejector pin and the upper ejector pin can move up and down along the first through slot and the second through slot. When the contact surface of the lower ejector pin and the upper ejector pin is located between the first through slot and the second through slot, the handle can be rotated in the mounting hole of the fixing seat, and the fastener is engaged with the buckle.

12. The oven equipment according to claim 11, characterized in that: The inner diameter of the first through-slot gradually increases in a direction approaching the second through-slot, and the size and shape of the lower ejector pin are adapted to those of the first through-slot.

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