CN219281478U

CN219281478U - Oven key management system and oven equipment

Info

Publication number: CN219281478U
Application number: CN202223020178.1U
Authority: CN
Inventors: 张忠涛; 杨林林; 焦国庆; 涂耀昌
Original assignee: Dongguan Songshanhu Jiatuo Intelligent Equipment Co ltd
Current assignee: Dongguan Songshanhu Jiatuo Intelligent Equipment Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-06-30
Anticipated expiration: 2032-11-14

Abstract

The utility model discloses an oven key management system and oven equipment, the oven key management system comprises a sub-bolt, a sub-key management device and a main bolt, the sub-key management device comprises a sub-bolt box body, a first main switch component and a sub-electromagnetic limiting component, a first main bolt hole for inserting the main bolt and a sub-bolt hole for inserting the sub-bolt are arranged at the top end of the sub-bolt box body, the first main switch component is used for switching on a main electromagnetic loop when the main bolt is inserted into the first main bolt hole and switching off the main electromagnetic loop when the main bolt is pulled out from the first main bolt hole, and the sub-electromagnetic limiting component is used for losing electricity and being located in a limiting position when the main electromagnetic loop is switched off and is used for getting electricity and being located in a return position when the main electromagnetic loop is switched on. The utility model can realize the intelligent management of the sub-bolts, saves time and labor and is convenient to operate.

Description

Oven key management system and oven equipment

Technical Field

The utility model relates to the technical field of equipment safety control, in particular to an oven key management system of a coating machine and oven equipment.

Background

The oven of the existing oven equipment is generally provided with a door lock assembly on the oven door, the door lock assembly is generally used for unlocking or locking the oven door through a sub-bolt, the door lock assembly is generally a safety lock capable of monitoring the opening and closing states of the oven door, specifically, the door lock assembly is connected with a controller through a cable, when the door lock assembly is unlocked through the sub-bolt, the door lock assembly sends an unlocking signal to the controller to indicate that the oven door is opened, and when the door lock assembly is locked through the sub-bolt, the door lock assembly sends a locking signal to the controller to indicate that the oven door is closed.

At present, the management of the sub-bolts of the door lock assembly is generally carried out in a centralized management mode in order to limit taking, which is time-consuming and labor-consuming.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides the oven key management system and the oven equipment, which can realize intelligent management of the sub-bolts and save time and labor.

The technical scheme adopted for solving the technical problems is as follows:

a first aspect of the present utility model provides an oven key management system, comprising a sub-plug for unlocking or locking a door lock assembly, a sub-key management device and a main plug, the sub-key management device comprising a sub-plug housing, a first main switch assembly and a sub-electromagnetic limit assembly, the top end of the sub-plug housing being provided with a first main plug hole for insertion of the main plug and a sub-plug hole for insertion of the sub-plug, the first main switch assembly being arranged to switch on a main electromagnetic circuit when the main plug is inserted into the first main plug hole and to switch off the main electromagnetic circuit when the main plug is pulled out of the first main plug hole, the sub-electromagnetic limit assembly being arranged to be de-energized and located in a limit position to block insertion of the sub-plug into or removal of the sub-plug from the sub-plug hole when the main electromagnetic circuit is switched on and to be de-energized and located in a return position to enable insertion of the sub-plug into or removal of the sub-plug from the sub-plug hole.

The second aspect of the utility model provides oven equipment, which comprises an oven and the oven key management system according to the technical scheme, wherein the oven comprises a box body and a door lock assembly, a door frame is arranged on the front surface of the box body, a door is arranged at a vacancy of the door frame, the door lock assembly is arranged on the door frame and the door, and a sub-bolt of the oven key management system is used for unlocking or locking the door lock assembly so as to open or close the door.

The beneficial effects of the utility model are as follows: the intelligent management of the sub-bolts can be realized through the sub-key management device and the main bolts, the time and labor are saved, the operation is convenient, the intelligent management of the main bolts can be realized through the main key management device, the power supply and the PLC, the time and labor are saved, the operation is convenient, and the sub-bolts, the main bolt, the sub-key management device, the main key management device, the power supply and the controller are combined together, so that the switch state of the oven door can be monitored, the safe production of the oven is ensured, compared with the monitoring mode of the door lock assembly in the prior art, the door lock assembly is not connected with the controller through a cable, the use of the cable in a production area can be reduced, the structure is simplified, and the operation is convenient.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of a sub-key management device of an oven key management system according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a first version of the main plug of the oven key management system of FIG. 1 inserted into a first main plug aperture of a sub-key management device;

FIG. 3 is a schematic cross-sectional view of the key management device of the oven key management system of FIG. 2 with the first master plug hole side stop pin in the retracted position and the upper contact and lower contact of the first master switch assembly out of contact;

FIG. 4 is a schematic cross-sectional view of a first version of the insertion of a sub-plug of the oven key management system of FIG. 1 into a sub-plug aperture of a sub-key management device;

FIG. 5 is a schematic cross-sectional view of a retaining pin on one side of a sub-plug aperture of a sub-key management device of the oven key management system of FIG. 4 in a retracted position and with an upper contact of a sub-switch assembly in contact with a lower contact;

FIG. 6 is a schematic circuit diagram of a first embodiment of a first main switch assembly and a sub-switch assembly of the oven key management system of FIG. 1;

FIG. 7 is a schematic diagram of the structure of the primary key management device of the oven key management system;

FIG. 8 is a schematic cross-sectional view of a first version of the master plug of the oven key management system of FIG. 7 inserted into a second master plug aperture of a master key management device;

FIG. 9 is a schematic cross-sectional view of the key management device of the oven key management system of FIG. 8 with the retaining pin on the second main bolt hole side in the retracted position and with the upper contact of the second main switch assembly out of contact with the lower contact;

FIG. 10 is a schematic circuit diagram of a first version of a second main switch assembly of the oven key management system of FIG. 7;

FIG. 11 is a schematic cross-sectional view of a second version of the main plug of the oven key management system of FIG. 1 inserted into a first main plug aperture of a sub-key management device;

FIG. 12 is a schematic cross-sectional view of a second version of the oven key management system of FIG. 1 with a sub-plug inserted into a sub-plug aperture of a sub-key management device;

FIG. 13 is a schematic cross-sectional view of a second alternative of a master plug of an oven key management system inserted into a second master plug aperture of a master key management device;

FIG. 14 is a schematic circuit diagram of a second embodiment of the first, sub, and second main switch assemblies of the oven key management system;

Fig. 15 is a schematic structural view of an oven apparatus according to an embodiment of the present utility model;

FIG. 16 is an enlarged partial schematic view of FIG. 15 at A;

FIG. 17 is a schematic cross-sectional view of a door lock assembly of an oven of the oven apparatus of FIG. 15;

fig. 18 is a schematic cross-sectional view of the oven apparatus of fig. 15 with a sub-latch inserted into a latch hole of a door lock assembly.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all the coupling/connection relationships referred to in the patent are not direct connection of the single-finger members, but rather, it means that a better coupling structure can be formed by adding or subtracting coupling aids depending on the specific implementation. The technical features in the utility model can be interactively combined on the premise of no contradiction and conflict.

Referring to fig. 1 to 6, an oven key management system according to an embodiment of the present utility model includes a sub-key management device 10, a main plug 20, a sub-plug 30, a main key management device 40, a power source and a controller. The controller is a PLC controller. The sub-latch 30 is used to unlock or lock the door lock assembly of the oven, so that the door of the oven can be opened or closed. The power supply is preferably a 24 volt dc power supply. The main bolt 20 and the sub-bolt 30 are identical in structure and each include a body and a head formed at the bottom end of the body.

The sub-key management device 10 includes a sub-plug housing 12, a first main switch assembly 15, a sub-electromagnetic limit assembly 18, a sub-switch assembly 19, and a first main electromagnetic limit assembly 17. The first main switch assembly 15 and the sub switch assembly 19 are mechanical switches, preferably contact switches. The top end of the sub-plug housing 12 is provided with a first main plug pin hole 13 for inserting the main plug pin 20 and a sub-plug pin hole 14 for inserting the sub-plug pin 30. The bottom in the first main bolt hole 13 and the bottom in the sub bolt hole 14 are respectively provided with a through hole communicated with the inside of the sub bolt box body 12. 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 housing 12 through the bottom through hole in the first main bolt hole 13, and 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 housing 12 through the bottom through hole in the sub-bolt hole 14.

A first main switch assembly 15 is provided in the sub-plug housing 12 below the first main plug pin aperture 13 and a sub-switch assembly 19 is provided below the sub-plug pin aperture 14. A sub electromagnetic limit assembly 18 is arranged in the sub-plug box body 12 at one side of the sub-plug hole 14, and a first main electromagnetic limit assembly 17 is arranged at one side of the first main plug hole 13.

The first main switch assembly 15 is connected between the positive pole and the negative pole of the power supply, and forms a main electromagnetic loop with the positive pole and the negative pole of the power supply. The first main switch assembly 15 is used to switch on the main electromagnetic circuit when the main bolt 20 is inserted into the first main bolt hole 13 and to switch off the main electromagnetic circuit when the main bolt 20 is pulled out of the first main bolt hole 13.

The sub electromagnetic limiting assembly 18 is connected between the first main switch assembly 15 and the negative pole of the power supply, and the sub electromagnetic limiting assembly 18 is used for losing electricity and being located at a limiting position when the main electromagnetic circuit is disconnected, so that the sub bolt 30 can be blocked from being inserted into the sub bolt hole 14 or the sub bolt 30 can be blocked from being pulled out of the sub bolt hole 14, and is used for getting electricity and being located at a retracting position when the main electromagnetic circuit is connected, so that the sub bolt 30 can be inserted into the sub bolt hole 14 or the sub bolt 30 can be pulled out of the sub bolt hole 14.

The sub-switch assembly 19 is connected between and forms a sub-electromagnetic circuit with the positive and negative poles of the power supply, and the sub-switch assembly 19 is used for switching on the sub-electromagnetic circuit when the sub-plug 30 is inserted into the sub-plug hole 14 and switching off the sub-electromagnetic circuit when the sub-plug 30 is pulled out of the sub-plug hole 14.

The first main electromagnetic limiting assembly 17 is connected between the sub-switch assembly 19 and the negative pole of the power supply, and the first main electromagnetic limiting assembly 17 is used for losing electricity and being located at a limiting position when the sub-electromagnetic circuit is disconnected, so that the main bolt 20 can be blocked from being pulled out of the first main bolt hole 13, and is used for getting electricity and being located at a retracting position when the sub-electromagnetic circuit is connected, so that the main bolt 20 can be pulled out of the first main bolt hole 13.

Specifically, the sub-plug housing 12 is provided with a first main partition 162 and a sub-partition 163 on the side of the first main plug hole 13 and on the side of the sub-plug hole 14, respectively. One end of the first main partition 162 and one end of the sub partition 163 are disposed at the top in the sub-plug housing 12, and the other end faces the bottom in the sub-plug housing 12. The first main switch assembly 15 and the sub switch assembly 19 have the same structure and each include an upper spring plate 152 and a lower spring plate 153. The lower spring 153 is disposed at the bottom of the sub-latch housing 12 and below the upper spring 152, where the lower spring 153 and the upper spring 152 are disposed in parallel. A compression spring 154 is provided between the upper spring 152 and the lower spring 153. The compression spring 154 is preferably a compression spring.

As shown in fig. 2, 3 and 6, in the first main switch assembly 15, one end of the upper spring plate 152 is rotatably disposed on the first main partition 162 through a rotating shaft and connected to the positive electrode of the power supply, and the other end is located below the first main latch hole 13 and is formed with an upper contact 1522. One end of the lower spring plate 153 is connected to the bottom end of the first main separator 162 and to the negative electrode of the power supply, and the other end is formed with a lower contact 1532, where the lower contact 1532 and the upper contact 1522 are disposed vertically opposite to each other. The upper spring plate 152 and the lower spring plate 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 for contact conduction when the main bolt 20 is inserted into the first main bolt hole 13, so as to realize the connection of the main electromagnetic circuit, and are used for disconnection when the main bolt 20 is pulled out from the first main bolt hole 13, so as to realize the disconnection of the main electromagnetic circuit. In practical application, when the main bolt 20 is inserted into the first main bolt hole 13, the head of the main bolt 20 may extend into the sub-bolt housing 12 and press down one end of the upper spring 152 where the upper contact 1522 is disposed, so that the upper contact 1522 is in contact conduction with the lower contact 1532.

In the sub-switch assembly 19, as shown in fig. 4 to 6, one end of the upper spring plate 152 is rotatably disposed on the sub-spacer 163 through a rotating shaft and connected to the positive electrode of the power source, and the other end is located below the sub-plug hole 14 and is formed with an upper contact 1522. One end of the lower spring plate 153 is connected with the bottom end of the sub-partition 163 and is connected with the negative electrode of the power supply, the other end of the lower spring plate is provided with a lower contact 1532, the lower contact 1532 and the upper contact 1522 are arranged vertically opposite to each other, the upper spring plate 152 and the lower spring plate 153 form a sub-electromagnetic loop with the positive electrode and the negative electrode of the power supply, the upper contact 1522 and the lower contact 1532 are used for being contacted and conducted when the sub-plug 30 is inserted into the sub-plug pin hole 14, so that the sub-electromagnetic loop is switched on, and for being disconnected when the sub-plug 30 is pulled out of the sub-plug pin hole 14, so that the sub-electromagnetic loop is switched off. In practical application, when the sub-plug 30 is inserted into the sub-plug hole 14, the head of the sub-plug 30 may extend into the sub-plug housing 12 and press down one end of the upper spring 152 where the upper contact 1522 is disposed, so that the upper contact 1522 is in contact conduction with the lower contact 1532.

The sub electromagnetic limiting assembly 18 has the same structure as the first main electromagnetic limiting assembly 17, and comprises an electromagnet 172, an L-shaped limiting pin 173 positioned on one side of the electromagnet 172, a connecting rod 174 and a tensile elastic member 175. An armature 1732 is provided on the side of the stop pin 173 adjacent to the electromagnet 173, with one end of the electromagnet 172 opposite 1732. The tensile elastic member 175 is preferably a tensile spring.

In the sub-electromagnetic limit assembly 18, as shown in fig. 4 to 6, the limit pin 173 is located between the electromagnet 172 and the sub-plug pin hole 14. An end of electromagnet 172 remote from armature 1732 is provided to sub-spacer 163, and electromagnet 172 is connected between first main switch assembly 15 and the negative pole of the power source. The inner wall of the sub-latch hole 14 is provided with a sub-latch hole 142, and the electromagnet 172 is used for losing electricity and breaking the adsorption to the armature 1732 of the latch 173 when the main electromagnetic circuit is disconnected so as to enable the latch 173 to be in a limit position, and is used for getting electricity and adsorbing the armature 1732 of the latch 173 when the main electromagnetic circuit is connected so as to enable the latch 173 to be in a retracted position. When the limiting pin 173 is located at the limiting position, the first end of the limiting pin 173 passes through the sub-limiting hole 142 and is engaged with the concave portion 32 of the sub-plug pin 30 or extends into the sub-plug pin hole 14, so that the sub-plug pin 30 can be prevented from being inserted into the sub-plug pin hole 14 or the sub-plug pin 30 can be prevented from being pulled out from the sub-plug pin hole 14 by the limiting pin 173. When the limiting pin 173 is in the retracted position, the first end of the limiting pin 173 is positioned in the sub-limiting hole 142, so that the sub-plug pin 30 can be inserted into the sub-plug pin hole 14 or the sub-plug pin 30 can be pulled out from the sub-plug pin hole 14.

In the sub electromagnetic limit assembly 18, one end of the connecting rod 174 is provided to the sub spacer 163, and the other end is directed toward the sub bolt hole 14 and rotatably connected to the limit pin 173 through a rotation shaft, and the tensile elastic member 175 is connected between the second end of the limit pin 173 and the sub spacer 163.

In the first main electromagnetic limit assembly 17, as shown in fig. 2, 3 and 6, the limit pin 173 is located between the electromagnet 172 and the first main plug pin hole 13. An end of electromagnet 172 remote from armature 1732 is provided to first main diaphragm 162 and electromagnet 172 is connected between sub-switch assembly 19 and the negative pole of the power source. The inner wall of the first main latch hole 13 is provided with a first main limit hole 132, and the electromagnet 172 is used for losing electricity and breaking the adsorption to the armature 1732 of the limit pin 173 when the sub electromagnetic circuit is disconnected so as to enable the limit pin 173 to be in a limit position, and is used for getting electricity and adsorbing the armature 1732 of the limit pin 173 when the sub electromagnetic circuit is connected so as to enable the limit pin 173 to be in a retracted position. When the limiting pin 173 is located at the limiting position, the first end of the limiting pin 173 passes through the first main limiting hole 132 and is engaged with the concave position 22 of the main bolt 20, so that the main bolt 20 can be prevented from being pulled out from the first main bolt hole 13 by the limiting pin 173. When the limiting pin 173 is in the retracted position, the first end of the limiting pin 173 is positioned in the first main limiting hole 132, so that the main bolt 20 can be pulled out from the first main bolt hole 13.

In the first main electromagnetic limiting assembly 17, one end of the connecting rod 174 is disposed to the first main partition 162, the other end faces the first main bolt hole 13 and is rotatably connected with the limiting pin 173 through a rotating shaft, and the tensile elastic member 175 is connected between the second end of the limiting pin 173 and the second main partition 162.

In this embodiment, the electromagnet 172 includes a magnet body 1722 and a coil 1723 wound on the magnet body 1722, the coil 1723 of the sub-electromagnetic limit assembly 18 is connected between the first main switch assembly 15 and the negative electrode of the power source, and is used for losing power when the main electromagnetic circuit is turned off and for powering on when the main electromagnetic circuit is turned on, and the magnet body 1722 is used for adsorbing the armature 1732 of the limit pin 173 under electromagnetic induction generated when the coil 1723 is powered on and for disconnecting the adsorption of the armature 1732 of the limit pin 173 when the coil 1723 is powered off.

Through the structure, when the device leaves a factory in actual application, the main bolt 20 and the sub-bolt 30 are respectively positioned in the first main bolt hole 13 and the sub-bolt hole 14, at the moment, the main electromagnetic loop and the sub-electromagnetic loop are both in a connection state, the sub-bolt 30 can be normally pulled out, and the door lock assembly of the oven door can be normally unlocked after the sub-bolt 30 is pulled out from the sub-bolt hole 14.

When the sub-plug 30 is pulled out of the sub-plug hole 14, the end of the upper spring 152 of the sub-switch assembly 19 located below the sub-plug hole 14 is not pressed by the head of the sub-plug 30, and under the reset action of the compression elastic member 154 of the sub-switch assembly 19, the upper spring 152 of the sub-switch assembly 19 can rotate to the initial position in the counterclockwise direction relative to the sub-partition 163, at this time, the upper contact 1522 of the sub-switch assembly 19 is disconnected from the lower contact 1532 of the sub-switch assembly 19, as shown in fig. 5, and at this time, the sub-electromagnetic circuit is disconnected. When the sub-electromagnetic loop is disconnected, the electromagnet 172 of the first main electromagnetic limiting assembly 17 is de-energized and the adsorption of the armature 1732 of the limiting pin 173 of the first main electromagnetic limiting assembly 17 is disconnected, under the reset action of the tensile elastic piece 175 of the first main electromagnetic limiting assembly 17, the limiting pin 173 of the first main electromagnetic limiting assembly 17 can rotate to the initial position along the clockwise direction relative to the connecting rod 174 of the first main electromagnetic limiting assembly 17, at this time, the limiting pin 173 of the first main electromagnetic limiting assembly 17 is located at the limiting position, and the first end of the limiting pin 173 of the first main electromagnetic limiting assembly 17 passes through the first main limiting hole 132 and is engaged with the concave position 22 of the main plug 20, so that the main plug 20 can be blocked from being pulled out from the first main plug hole 13 through the limiting pin 173 of the first main electromagnetic limiting assembly 17, and the main plug 20 cannot be pulled out from the first main plug hole 13. When the main bolt 20 cannot be pulled out from the first main bolt hole 13, the sub bolt 30 is indicated to be in a state of unlocking the door lock assembly of the oven door, and the oven door is not closed.

After the door lock assembly of the oven door is locked by the sub-bolt 30, the sub-bolt 30 is inserted into the sub-bolt hole 14. During insertion of the sub-plug 30, the head of the sub-plug 30 extends into the sub-plug housing 12 and presses down one end of the upper spring 152 of the sub-switch assembly 19 located below the sub-plug 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 fig. 4, at which time the sub-electromagnetic circuit is turned on, and during pressing down one end of the upper spring 152 of the sub-switch assembly 19 located below the sub-plug hole 14, the upper spring 152 of the sub-switch assembly 19 may rotate clockwise with respect to the sub-spacer 163, while the compression elastic member 154 of the sub-switch assembly 19 is compressed. When the sub-electromagnetic circuit is turned on, the electromagnet 172 of the first main electromagnetic limiting assembly 17 is powered on and adsorbs the armature 1732 of the limiting pin 173 of the first main electromagnetic limiting assembly 17, in the adsorption process, the limiting pin 173 of the first main electromagnetic limiting assembly 17 can rotate in the anticlockwise direction relative to the connecting rod 174 of the first main electromagnetic limiting assembly 17, when the electromagnet 172 of the first main electromagnetic limiting assembly 17 and the armature 1732 of the limiting pin 173 of the first main electromagnetic limiting assembly 17 are adsorbed together, the limiting pin 173 of the first main electromagnetic limiting assembly 17 is located in the retraction position, at the moment, the first end of the limiting pin 173 of the first main electromagnetic limiting assembly 17 is located in the first main limiting hole 132, and the stretching elastic piece 175 of the first main electromagnetic limiting assembly 17 is in a stretching state, as shown in fig. 3, since the first end of the limiting pin 173 of the first main electromagnetic limiting assembly 17 is not engaged with the concave position 22 of the main bolt 20, the main bolt 20 can be pulled out from the first main bolt hole 13, and when the main bolt 20 can be pulled out from the first main bolt hole 13, the main bolt hole 20 is pulled out, the door lock of the oven door 30 is closed by the sub-door lock assembly.

In the process of pulling out the main bolt 20, one end of the upper elastic piece 152 of the first main switch assembly 15, which is located below the first main bolt hole 13, is not pressed down by the head of the main bolt 20, under the reset action of the compression elastic piece 154 of the first main switch assembly 15, the upper elastic piece 152 of the first main switch assembly 15 can rotate to an initial position along the counterclockwise direction relative to the first main partition 162, at this time, the upper contact 1522 of the first main switch assembly 15 is disconnected from the lower contact 1532 of the first main switch assembly 15, and at this time, the main electromagnetic circuit is disconnected. When the main electromagnetic loop is disconnected, the electromagnet 172 of the sub electromagnetic limiting assembly 18 is de-energized and the adsorption of the armature 1732 of the limiting pin 173 of the sub electromagnetic limiting assembly 18 is disconnected, under the reset action of the stretching elastic piece 175 of the sub electromagnetic limiting assembly 18, the limiting pin 173 of the sub electromagnetic limiting assembly 18 can rotate to an 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 at a limiting position, and 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 concave position 32 of the sub plug 30, so that the sub plug 30 can be blocked from being pulled out from the sub plug pin hole 14 through the sub limiting pin 183, and the sub plug 30 can not be pulled out from the sub plug pin hole 14, so that the door lock assembly of the oven door can not be unlocked through the sub plug 30, and safety production is ensured.

When the main bolt 20 is inserted into the first main bolt hole 13, the head of the main bolt 20 extends into the sub-bolt housing 12 and presses down one end of the upper spring 152 of the first main switch assembly 15 located below the first main bolt hole 13, so that the upper contact 1522 of the first main switch assembly 15 is in contact with the lower contact 1532 of the first main switch assembly 15, as shown in fig. 2, at this time, the main electromagnetic circuit is turned on, and during the process of pressing down one end of the upper spring 152 of the first main switch assembly 15 located below the first main bolt hole 13, the upper spring 152 of the first main switch assembly 15 can rotate in a clockwise direction with respect to the first main partition 162, and at the same time, the compression elastic member 154 of the first main switch assembly 15 is compressed. When the main electromagnetic loop is connected, the electromagnet 172 of the sub electromagnetic limiting assembly 18 is electrified and can absorb the armature 1732 of the limiting pin 173 of the sub electromagnetic limiting assembly 18, in the absorption process, the limiting pin 173 of the sub electromagnetic limiting assembly 18 can rotate along the anticlockwise 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 absorbed together, the limiting pin 173 of the sub electromagnetic limiting assembly 18 is positioned at the retraction position, at the moment, the first end of the limiting pin 173 of the sub electromagnetic limiting assembly 18 is positioned in the sub limiting hole 142, and the stretching elastic piece 175 of the sub electromagnetic limiting assembly 18 is in the stretching state, as shown in fig. 5, as the first end of the limiting pin 173 of the sub electromagnetic limiting assembly 18 is not clamped with the concave position 32 of the sub plug pin 30, the sub plug pin 30 can be pulled out from the sub plug pin hole 14, and at the moment, the oven door can be unlocked through the sub plug pin 30.

In this embodiment, the number of the first main pin holes 13, the first main switch assemblies 15, and the first main electromagnetic limit assemblies 17 corresponds to the number of the main pins 20, and the number of the sub pins 30 corresponds to the number of the sub pins 30, for example, six, and the number of the sub pin holes 14, the sub electromagnetic limit assemblies 18, and the sub switch assemblies 19 corresponds to the number of the sub pins 30, and six, so that unified management of the sub pins 30 of multiple ovens can be realized in this embodiment. The six sub-switch assemblies 19 are connected in series, the six sub-switch assemblies 19 and the positive pole and the negative pole of the power supply form a sub-electromagnetic loop, and the electromagnets 172 of the six sub-electromagnetic limiting assemblies 18 are connected in parallel, as shown in fig. 6. 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 from the first main bolt hole 13.

It will be appreciated that the six sub-pins 30 may or may not be the same size. For convenience in distinguishing and convenience in field operation of operators, each sub-plug pin 30 and each sub-plug pin hole 14 may be designed to have a different color, and the size and color of each sub-plug pin 30 are matched with those of the corresponding sub-plug pin hole 14, and each sub-plug pin 30 and each sub-plug pin hole 14 may be numbered, for example, the sub-plug pin 1 and the sub-plug pin 2.

The sub-plug 30 may be, for example, one, two, or other numbers.

It should be understood that the number of the first main pin holes 13, the first main switch assemblies 15, and the first main electromagnetic limit assemblies 17 may be plural, for example, four, the number of the first main switch assemblies 15 is plural, the first main switch assemblies 15 are connected in series, the first main switch assemblies 15 form a main electromagnetic circuit with the positive pole and the negative pole of the power supply, and the electromagnets 172 of the first main electromagnetic limit assemblies 17 are connected in parallel. When there are a plurality of main bolts 20, all the main bolts 20 are respectively inserted into the corresponding first main bolt holes 13, then the sub bolts 30 can be normally inserted or extracted, and when one main bolt 20 is not inserted into the corresponding first main bolt hole 13, the sub bolts 30 cannot be inserted into the corresponding sub bolt holes 14 or extracted from the corresponding sub bolt holes 14.

For convenience in distinguishing and for convenience in field operation of operators, each main bolt 20 and each first main bolt hole 13 may be designed to have a different color, and the size and color of each main bolt 20 are matched with those of the corresponding first main bolt hole 13, and each main bolt 20 and each first main bolt hole 13 may be numbered, for example, a main bolt 1 and a main bolt 2.

The number of the main bolts 20, the sub bolts 30, the first main bolt holes 13, the first main switch assembly 15, the first main electromagnetic limit assembly 17, the sub bolt holes 14, the sub electromagnetic limit assemblies 18 and the sub switch assemblies 19 can be set according to practical situations.

As shown in connection with fig. 7-10, the master key management device 40 includes a master latch housing 42, a second master switch assembly 45, and a second master electromagnetic limit assembly 46. The top end of the main bolt housing 42 is provided with a second main bolt hole 43 for the main bolt 20 to be inserted, and the second main bolt hole 43 communicates with the inside of the main bolt housing 42. The bottom in the second main bolt hole 43 is provided with a through hole which is communicated with the inside of the main bolt box body 42, and when the main bolt 20 is inserted into the second main bolt hole 43, the head of the main bolt 20 can extend into the main bolt box body 42 through the through hole at the bottom in the second main bolt hole 43.

A second main switch assembly 45 is disposed within the main bolt housing 42 below the second main bolt aperture 43. A second main electromagnetic limit assembly 46 is provided in the main bolt housing 42 on the side of the second main bolt bore 43. The second main switch assembly 45 is also a mechanical switch, preferably a contact switch, similar in construction to the first main switch assembly 15 and the sub switch assembly 19. The structure of the second main electromagnetic limiting assembly 46 is the same as that of the first main electromagnetic limiting assembly 17 and the sub electromagnetic limiting assembly 18.

The second main switch assembly 45 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. The second main switch assembly 45 is used for switching on the total electromagnetic circuit and outputting a conducting signal to the PLC when the main bolt 20 is inserted into the second main bolt hole 43, and switching off the total electromagnetic circuit when the main bolt 20 is pulled out of the second main bolt hole 43, and the PLC is used for controlling the starting oven to perform heating and drying work when receiving the conducting signal, so that the pole piece positioned in the oven body can be heated and dried through the oven.

The second main electromagnetic limiting component 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, and the PLC controller is used for controlling the secondary electromagnetic loop to be turned off and for controlling the secondary electromagnetic loop to be turned on when receiving the on signal. The second main electromagnetic limit assembly 46 is configured to be de-energized and in a limit position when the secondary electromagnetic circuit is off, thereby blocking the main bolt 20 from being pulled out of the second main bolt aperture 43, and configured to be energized and in a retract position when the secondary electromagnetic circuit is on, thereby enabling the main bolt 20 to be pulled out of the second main bolt aperture 43.

Specifically, a second main partition 44 is disposed in the main latch housing 42 at one side of the second main latch hole 43, and one end of the second main partition 44 is disposed at the top in the main latch housing 42, and the other end is directed toward the bottom in the main latch housing 42. One end of the upper spring 152 of the second main switch assembly 45 is rotatably provided to the second main partition 44 through a rotation shaft and connected to the PLC controller, and the other end is located under the second main pin hole 43 and formed with an upper contact 1522. The lower spring plate 153 of the second main switch assembly 45 is disposed at the bottom of the main latch box 42 and below the upper spring plate 152 of the second main switch assembly 45, one end of the lower spring plate 153 of the second main switch assembly 45 is connected with the bottom end of the second main separator 44 and connected with the negative electrode of the power supply, and the other end is formed with a lower contact 1532. The upper spring plate 152 and the lower spring plate 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, and 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 for being in contact and conduction when the main bolt 20 is inserted into the second main bolt hole 43, so as to realize the switching on of the total electromagnetic loop and the outputting of a conducting signal to the PLC controller, and are used for being out of contact when the main bolt 20 is pulled out from the second main bolt hole 43, so as to realize the switching off of the total electromagnetic loop. In practice, when the main bolt 20 is inserted into the second main bolt hole 43, the head of the main bolt 20 may extend into the main bolt housing 42 and press down one end of the upper spring 152 where the upper contact 1522 is disposed, so that the upper contact 1522 is in contact conduction with the lower contact 1532.

The stop pin 173 of the second main electromagnetic stop assembly 46 is positioned between the electromagnet 172 of the second main electromagnetic stop assembly 46 and the second main bolt hole 43. The electromagnet 172 of the second main magnetic 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 configured to control the secondary electromagnetic loop to be turned off in such a manner as to output a low level and to control the secondary electromagnetic loop to be turned on in such a manner as to output a high level when receiving the on signal. The electromagnet 172 of the second main electromagnetic limit assembly 46 is used for losing electricity and breaking the adsorption to the armature 1732 of the limit pin 173 of the second main electromagnetic limit assembly 46 when the secondary electromagnetic circuit is broken so that the limit pin 173 of the second main electromagnetic limit assembly 46 is located at the limit position, thereby blocking the main bolt 20 from being pulled out of the second main bolt hole 43 through the limit pin 173 of the second main electromagnetic limit assembly 46, and is used for getting electricity and adsorbing the armature 1732 of the limit pin 173 of the second main electromagnetic limit assembly 46 when the secondary electromagnetic circuit is turned on so that the limit pin 173 of the second main electromagnetic limit assembly 46 is located at the retract position, thereby enabling the main bolt 30 to be pulled out from the second main bolt hole 43.

The inner wall of the second main bolt 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 positioned at the retraction position, the first end of the limiting pin 173 of the second main electromagnetic limiting assembly 46 is positioned in the second main limiting hole 432, and when the limiting pin 173 of the second main electromagnetic limiting assembly 46 is positioned 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 is clamped with the concave position 22 of the main bolt 20.

One end of the connecting rod 174 of the second main electromagnetic stop assembly 46 is provided to the second main partition 44 and the other end is directed toward the second main bolt hole 43. The tensile spring 175 of the second primary electromagnetic limit assembly 46 is connected between the second primary spacer 44 and the second end of the limit pin 463 of the second primary electromagnetic limit assembly 46.

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 controlled by the PLC controller to be turned on, at this time, the electromagnet 172 of the second main electromagnetic limiting assembly 46 is powered on 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 located at the retracted position, and when the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located at the retracted position, the first end of the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located at the second main limiting hole 432, and at this time, the main plug 20 can be inserted into the second main plug hole 43. During insertion of the main bolt 20 into the second main bolt hole 43, the head of the main bolt 20 will extend into the main bolt housing 42 and press down one end of the upper spring piece 152 of the second main switch assembly 45 below the second main bolt hole 43, so that the upper contact 1522 of the second main switch assembly 45 is in contact conduction with the lower contact 1532 of the second main switch assembly, as shown in fig. 8, at this time, the main electromagnetic circuit is turned on and a conduction signal will be output to the PLC controller, and a prompt, such as an indication that the door of the oven is closed, or other such as an audible prompt, can be sent to the display through the PLC controller. In the process of pressing down one end of the upper spring 152 of the second main switch assembly 45 located below the second main bolt hole 43, the upper spring 152 of the second main switch assembly 45 may rotate in a clockwise direction with respect to the second main partition 44, while the compression elastic member 154 of the second main switch assembly 45 is compressed.

After receiving the on signal, the PLC controller controls the secondary electromagnetic circuit to be disconnected and controls the starting oven to perform heating and drying operations, after the secondary electromagnetic circuit is disconnected, the electromagnet 172 of the second main electromagnetic limiting assembly 46 is powered off and the adsorption of the armature 1732 of the limiting pin 173 of the second main electromagnetic limiting assembly 46 is disconnected, under the reset action of the tensile elastic piece 175 of the second main electromagnetic limiting assembly 46, the limiting pin 173 of the second main electromagnetic limiting assembly 46 can rotate to the initial position along the clockwise direction relative to the connecting rod 174 of the second main electromagnetic limiting assembly 46, at this time, the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located at the limiting position, and 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 concave position 22 of the main plug 20, so that the main plug 20 can be blocked from being pulled out from the second main plug hole 43 through the limiting pin 173 of the second main plug 46, and the main plug 20 can not be pulled out from the second main plug hole 43, thereby ensuring safe production.

When the oven is in a heating and drying operation and the interior of the oven is in a high temperature state, the PLC controls the secondary electromagnetic circuit to be disconnected, so that the main bolt 20 cannot be pulled out of the second main bolt hole 43, and the sub-bolts 30 cannot be pulled out of the sub-bolt holes 14. When the oven finishes working or the door is allowed to be opened, the PLC controller controls the secondary electromagnetic circuit to be connected, the electromagnet 172 of the second main electromagnetic limiting assembly 46 is powered on and can absorb the armature 1732 of the limiting pin 173 of the second main electromagnetic limiting assembly 46, in the absorption process, the limiting pin 173 of the second main electromagnetic limiting assembly 46 can rotate along the anticlockwise direction relative to the connecting rod 174 of the second main electromagnetic limiting assembly 46, when the electromagnet 172 of the second main electromagnetic limiting assembly 46 and the armature 1732 of the limiting pin 173 of the second main electromagnetic limiting assembly 46 are absorbed together, the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located in the receiving and returning position, at this time, 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, and the stretching elastic piece 175 of the second main electromagnetic limiting assembly 46 is in the stretching state, as shown in fig. 9, since the first end of the limiting pin 173 of the second main electromagnetic limiting assembly 46 is not clamped with the concave position 22 of the main plug 20, the main plug 20 can be pulled out from the second main plug pin hole 43, and then the main plug 20 can be plugged into the first main plug pin hole 13 to realize the plug hole of the oven, and the plug 30 can be pulled out from the oven door 30.

After the main bolt 20 is pulled out from the second main bolt hole 43, one end of the upper elastic piece 152 of the second main switch assembly 45, which is located below the second main bolt hole 43, is not pressed down by the head of the main bolt 20, and under the reset action of the compression elastic piece 154 of the second main switch assembly 45, the upper elastic piece 152 of the second main switch assembly 45 can rotate to the initial position along the anticlockwise direction relative to the second main partition 44, at this 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.

The number of second main bolt holes 43, second main switch assemblies 45, second main electromagnetic limit assemblies 46 corresponds to the number of main bolts 20. The second main bolt aperture 43 corresponds in size, shape, and color to the main bolt 20. When there are a plurality of, for example four, main plugs 20, 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 limit 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 switched on and a conducting signal is output to the PLC controller.

The sub key management device 10, the main key management device 40, the power supply and the PLC controller of the present utility model may be provided in a general control cabinet. The sub-latch case 12 and the main latch case 42 are respectively provided with a wire passing hole, and wires connected with the positive electrode and the negative electrode of the power supply by the upper elastic sheet 152, the lower elastic sheet 153 and the coil 1723 of the electromagnet 172 in the sub-latch case 12 can pass through the wire passing holes of the sub-latch case 12. The wires of the upper spring plate 152, the lower spring plate 153 and the coil 1723 of the electromagnet 172 in the main bolt box 42, which are connected with the negative electrode of the PLC controller and the power supply, can pass through the wire passing holes of the main bolt box 42.

In an alternative, as shown in fig. 11, 12 and 14, the first main switch assembly 15 and the sub switch assembly 19 are both inductive switches, which are electromagnetic inductive switches. The inductive switch may be other, such as a capacitive proximity switch, where the main bolt 20 and the sub-bolt 30 are both made of metal.

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

In the first main switch assembly 15, the secondary induction coil 23 is disposed at the bottom end of the body of the main bolt 20, and the main induction coil 133 is disposed at the bottom inside the first main bolt hole 13. The main induction coil 133 is connected between the PLC controller and the negative electrode of the power supply, and forms a main path with the PLC controller and the negative electrode 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 main induction coil 133 and outputs a turn-on signal, which is a current signal generated by coupling the secondary induction coil 23 with the main induction coil 133, to the PLC controller. The coil 1723 of the electromagnet 172 of the sub-electromagnetic limit 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 on signal, the PLC controller controls the main electromagnetic circuit to be turned on in a manner of outputting a high level, for example, so that the electromagnet 172 of the sub-electromagnetic limit assembly 18 is powered on, and the armature 1732 of the limit pin 173 is adsorbed to enable the limit pin 173 to be located at the retracted position.

In the sub-switch assembly 19, the main induction coil 23 is disposed at the bottom end of the body of the sub-plug 30, and the sub-induction coil 133 is disposed at the bottom inside the sub-plug hole 14. The secondary induction coil 133 is connected between the PLC controller and the negative electrode of the power supply, and forms a sub-path with the PLC controller and the negative electrode of the power supply. When the sub-plug 30 is inserted into the sub-plug hole 14, the sub-induction coil 23 is coupled with the main induction coil 133 and outputs a turn-on signal, which is a current signal generated by coupling the sub-induction coil 23 with the main induction coil 133, to the PLC controller. The coil 1723 of the electromagnet 172 of the first main electromagnetic limit 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 on signal, the PLC controller controls the sub-electromagnetic circuit to be turned on in a manner of outputting a high level, for example, so that the electromagnet 172 of the first main electromagnetic limit assembly 17 is powered on, and the armature 1732 of the limit pin 173 is adsorbed to enable the limit pin 173 to be located at the retracted position.

In practical 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 and the primary induction coil 133 of the sub-switch assembly 19, and the PLC controller controls the sub-electromagnetic circuit to be disconnected. When the sub-electromagnetic loop is disconnected, the electromagnet 172 of the first main electromagnetic limiting assembly 17 is de-energized and the adsorption of the armature 1732 of the limiting pin 173 of the first main electromagnetic limiting assembly 17 is disconnected, under the reset action of the tensile elastic piece 175 of the first main electromagnetic limiting assembly 17, the limiting pin 173 of the first main electromagnetic limiting assembly 17 can rotate to the initial position along the clockwise direction relative to the connecting rod 174 of the first main electromagnetic limiting assembly 17, at this time, the limiting pin 173 of the first main electromagnetic limiting assembly 17 is located at the limiting position, and the first end of the limiting pin 173 of the first main electromagnetic limiting assembly 17 passes through the first main limiting hole 132 and is engaged with the concave position 22 of the main plug 20, so that the main plug 20 can be blocked from being pulled out from the first main plug hole 13 through the limiting pin 173 of the first main electromagnetic limiting assembly 17, and the main plug 20 cannot be pulled out from the first main plug hole 13. When the main bolt 20 cannot be pulled out from the first main bolt hole 13, the sub bolt 30 is indicated to be in a state of unlocking the door lock assembly of the oven door, and the oven door is not closed.

After the door lock assembly of the oven door is locked by the sub-bolt 30, the sub-bolt 30 is inserted into the sub-bolt 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 conducting signal to the PLC controller, and the PLC controller controls the sub-electromagnetic circuit to be turned on after receiving the conducting signal. When the sub-electromagnetic circuit is turned on, the electromagnet 172 of the first main electromagnetic limiting assembly 17 is powered on and adsorbs the armature 1732 of the limiting pin 173 of the first main electromagnetic limiting assembly 17, in the adsorption process, the limiting pin 173 of the first main electromagnetic limiting assembly 17 can rotate in the anticlockwise direction relative to the connecting rod 174 of the first main electromagnetic limiting assembly 17, when the electromagnet 172 of the first main electromagnetic limiting assembly 17 and the armature 1732 of the limiting pin 173 of the first main electromagnetic limiting assembly 17 are adsorbed together, the limiting pin 173 of the first main electromagnetic limiting assembly 17 is located in the retraction position, at the moment, the first end of the limiting pin 173 of the first main electromagnetic limiting assembly 17 is located in the first main limiting hole 132, and the stretching elastic piece 175 of the first main electromagnetic limiting assembly 17 is in a stretching state, as shown in fig. 3, since the first end of the limiting pin 173 of the first main electromagnetic limiting assembly 17 is not engaged with the concave position 22 of the main bolt 20, the main bolt 20 can be pulled out from the first main bolt hole 13, and when the main bolt 20 can be pulled out from the first main bolt hole 13, the main bolt hole 20 is pulled out, the door lock of the oven door 30 is closed by the sub-door lock assembly.

During the process of pulling out the main plug 20, no current signal is generated between the secondary induction coil 23 and the main induction coil 133 of the first main switch assembly 15, and the PLC controller main electromagnetic circuit is disconnected. When the main electromagnetic loop is disconnected, the electromagnet 172 of the sub electromagnetic limiting assembly 18 is de-energized and the adsorption of the armature 1732 of the limiting pin 173 of the sub electromagnetic limiting assembly 18 is disconnected, under the reset action of the stretching elastic piece 175 of the sub electromagnetic limiting assembly 18, the limiting pin 173 of the sub electromagnetic limiting assembly 18 can rotate to an 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 at a limiting position, and 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 concave position 32 of the sub plug 30, so that the sub plug 30 can be blocked from being pulled out from the sub plug pin hole 14 through the sub limiting pin 183, and the sub plug 30 can not be pulled out from the sub plug pin hole 14, so that the door lock assembly of the oven door can not be unlocked through the sub plug 30, and safety production is ensured.

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 turn-on signal to the PLC controller, which controls the main electromagnetic circuit to be turned on after receiving the turn-on signal. When the main electromagnetic loop is connected, the electromagnet 172 of the sub electromagnetic limiting assembly 18 is electrified and can absorb the armature 1732 of the limiting pin 173 of the sub electromagnetic limiting assembly 18, in the absorption process, the limiting pin 173 of the sub electromagnetic limiting assembly 18 can rotate along the anticlockwise 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 absorbed together, the limiting pin 173 of the sub electromagnetic limiting assembly 18 is positioned at the retraction position, at the moment, the first end of the limiting pin 173 of the sub electromagnetic limiting assembly 18 is positioned in the sub limiting hole 142, and the stretching elastic piece 175 of the sub electromagnetic limiting assembly 18 is in the stretching state, as shown in fig. 5, as the first end of the limiting pin 173 of the sub electromagnetic limiting assembly 18 is not clamped with the concave position 32 of the sub plug pin 30, the sub plug pin 30 can be pulled out from the sub plug pin hole 14, and at the moment, the oven door can be unlocked through the sub plug pin 30.

In this embodiment, when the number of the sub-switch assemblies 19 is plural, for example, 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 poles of the PLC controller and the power supply respectively, the electromagnets 172 of the sub-electromagnetic limit assemblies 18 are connected in parallel, and each sub-electromagnetic limit assembly 18 forms a main electromagnetic loop with the negative poles of the PLC controller and the power supply respectively.

It will be appreciated that when the first main switch assembly 15 is a mechanical switch, the sub-switch assembly 19 may be of the same type as the first main switch assembly 15 or may be of a different type.

As shown in fig. 13 and 14, in one alternative, the second main switch assembly 45 is an inductive switch, which is a coil inductive switch. The inductive switch may be other, such as a capacitive proximity switch, and the main bolt 20 is made of metal.

Specifically, the second main switch assembly 45 includes a main induction coil 133 and a sub-induction coil 23. The secondary induction coil 23 corresponds to a primary coil of a transformer, and the primary induction coil 133 corresponds to a secondary coil of the transformer.

In the second main switch assembly 45, the secondary induction coil 23 is disposed at the bottom end of the body of the main bolt 20, and the main induction coil 133 is disposed at the bottom inside the second main bolt 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.

In practical application, after the main bolt 20 is pulled out from the first main bolt hole 13 and before the main bolt 20 is inserted into the second main bolt hole 43, the secondary electromagnetic circuit is controlled to be turned on by the PLC controller, at this time, the electromagnet 172 of the second main electromagnetic limiting assembly 46 is powered on 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 located at the retraction position, and when the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located at the retraction position, the first end of the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located at the second main limiting hole 432, and at this time, the main bolt 20 can be inserted into the second main bolt hole 43. When the main plug 20 is inserted into the second main plug hole 43, the secondary induction coil 23 is coupled with the main induction coil 133 and outputs a turn-on signal, which is a current signal generated by coupling the secondary induction coil 23 with the main induction coil 133, to the PLC controller. When the PLC controller receives the on signal, a prompt that the oven door of the oven is closed or other voice prompts and the like can be sent to a display through the PLC controller. Meanwhile, the PLC controls the secondary electromagnetic loop to be disconnected in a low-level output mode, and controls the starting oven to heat and dry, after the secondary electromagnetic loop is disconnected, the electromagnet 172 of the second main electromagnetic limiting assembly 46 is powered off and the armature 1732 of the limiting pin 173 of the second main electromagnetic limiting assembly 46 is disconnected, under the reset action of the stretching elastic piece 175 of the second main electromagnetic limiting assembly 46, the limiting pin 173 of the second main electromagnetic limiting assembly 46 can rotate to an initial position along the clockwise direction relative to the connecting rod 174 of the second main electromagnetic limiting assembly 46, at the moment, the limiting pin 173 of the second main electromagnetic limiting assembly 46 is located at a limiting position, and the first end of the limiting pin 173 of the second main electromagnetic limiting assembly 46 penetrates through the second main limiting hole 432 and is clamped with the concave position 22 of the main plug 20, so that the main plug 20 can be blocked from being pulled out from the second main plug hole 43 through the limiting pin 173 of the second main electromagnetic limiting assembly 46, and the main plug 20 cannot be pulled out from the second main plug hole 43, so that safe production is ensured.

In this embodiment, when there are a plurality of, for example four, main bolts 20, the main induction coils 133 of the four second main switch assemblies 45 are connected in parallel. The main induction coil 133 of each second main switch assembly 45 forms a total electromagnetic loop with the PLC controller and the negative pole of the power supply, respectively.

The intelligent management of the sub-bolts 30 can be realized through the sub-key management device 10 and the main bolts 20, the time and labor are saved, the operation is convenient, the centralized management is not needed by manpower, the intelligent management of the main bolts 20 can be realized through the main key management device 40, the power supply and the PLC, the time and labor are saved, the operation is convenient, and the sub-bolts 30, the main bolts 20, the sub-key management device 10, the main key management device 40 and the power supply are combined with the controller, so that the on-off state of the oven door can be monitored, the safe production of the oven is ensured, compared with the monitoring mode of the door lock assembly in the prior art, the door lock assembly is not connected with the controller through the cable, the use of the cable in the production area can be reduced, the structure is simplified, and the operation is convenient. The mechanical switch or the inductive switch and the electromagnetic limit assembly are adopted in the process of managing the sub-plug 30 and the main plug 20, so that the structure is simplified, and the operation is easy.

Referring to fig. 15, the present utility model further provides an oven apparatus, including an oven 60 and the oven key management system described above.

As shown in connection with fig. 16 and 17, oven 60 includes a housing 62 and a door lock assembly. The front surface of the case 62 is provided with a door 622, and a door 623 is provided at a space of the door 622. Door lock assemblies are provided on the door 623 and the door frame 622. A heating mechanism is provided in the case 62. The heating mechanism is connected with a PLC controller of the oven key management system. The heating mechanism can be controlled by the PLC to heat and dry, so that the pole piece positioned in the box 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 to effect opening or closing of the oven door 623.

The door lock assembly includes a fixed base 632, a handle 633, a buckle 634, a lower thimble 635, an upper thimble 636, and a thimble elastic member 637. The fixing base 632 is arranged in the through hole of the refrigerator door 623, the handle 633 is arranged in the mounting hole of the fixing base 632 in a penetrating mode and can rotate relative to the fixing base 632, an end cover 6335 is arranged on the periphery of one end of the handle 633, the outer diameter of the end cover 6335 is larger than the inner diameter of the mounting hole of the fixing base 632, the handle 633 can be limited through the arranged end cover 6335, the handle 633 is prevented from being separated from the mounting hole of the fixing base 632, a hand holding portion 6332 is formed at the other end of the handle 633, and the handle 633 can be rotated conveniently. One end of the handle 633 forming the hand holding part 6332 is provided with a lock hole 6334 for inserting the sub-plug 30 of the oven key management system, the lock hole 6334 penetrates through two ends of the handle 633, and the size and shape of the lock hole 6334 are matched with those of the sub-plug 30. A first through groove 6334a is formed in one side of the inner wall of the lock hole 6334, and the first through groove 6334a is located above the lock hole 6334. A second through groove 632a communicated with the first through groove 6334a is arranged on one side of the inner wall of the mounting hole. The lower thimble 635 is disposed in the first through groove 6334a, the bottom end of the lower thimble 635 extends into the lock hole 6334, the upper thimble 636 is disposed in the second through groove 632a, and the bottom end of the upper thimble 636 extends into the first through groove 6334a and contacts with the top end of the lower thimble 635, and since the upper thimble 636 is partially disposed in the first through groove 6334a, i.e. the contact surface between the upper thimble 636 and the lower thimble 635 is disposed below the second through groove 632a, the upper thimble 636 can block the handle 633 from rotating relative to the fixing seat 632. The ejector pin elastic member 637 is located in the second through groove 632a, and a cover 638 is disposed in an end of the second through groove 632a away from the first through groove 6334a, and the ejector pin elastic member 637 is connected between the upper ejector pin 636 and the cover 638. The ejector pin spring 638 is preferably a compression spring. The lower thimble 635 and the upper thimble 636 can move up and down along the first through groove 6334a and the second through groove 632a, when the contact surface between the lower thimble 635 and the upper thimble 636 is located between the first through groove 6334a and the second through groove 632a, the handle 633 is not blocked by the upper thimble 636, so that the handle 633 can rotate in the installation hole of the fixing seat 632. The handle 633 has a catch 6333 on its outer periphery, and the catch 6333 engages with the catch 634.

The periphery of the head of the sub-plug 30 is provided with a groove 33, and the bottom end of the lower thimble 635 is used for matching with the groove 33 of the sub-plug 30.

The inner diameter of the first through groove 6334a gradually increases along the direction approaching to the second through groove 632a, the size and shape of the lower thimble 635 are matched with those of the first through groove 6334a, and the structure can clamp the lower thimble 635 so as to prevent the bottom end of the lower thimble 635 from contacting with the inner wall of the other side of the locking hole 6334, thereby facilitating the insertion of the sub-plug 30. The upper thimble 636 has a size and shape that is compatible with the size and shape of the second through groove 632 a.

With the above structure, when the door 623 is to be opened, the sub-plug 30 is first pulled out from the sub-plug hole 14 of the sub-key management device 10, then the sub-plug 30 is inserted into the lock hole 6334, during the process of inserting the sub-plug 30 into the lock hole 6334, the sub-plug 30 presses the lower-plug 635 upward, the lower-plug 635 can move upward under the pressing of the sub-plug 30 and pushes the upper-plug 636 to move upward, the upward movement of the upper-plug 636 compresses the elastic member 637, when the bottom end of the lower-plug 635 is matched with the groove 33 of the sub-plug 30, the contact surface of the upper-plug 636 and the lower-plug 635 is located between the first through groove 6334a and the second through groove 632a, as shown in fig. 18, at this time, the handle 633 is not blocked by the upper-plug 636, so that the handle 633 can rotate in the mounting hole of the fixing seat 632, and then the handle 633 is rotated, so that the fastening member 6333 is separated from the fastening member 634, and the door 623 is opened.

When the door 623 is to be closed, the handle 633 is turned to engage the catch 6333 with the catch 634, and then the sub-plug 30 is pulled out from the lock hole 6334, and the sub-plug 6334 is pulled out, under the reset action of the ejector pin elastic member 637, the ejector pin elastic member 637 can push the upper ejector pin 636 to move downward to the initial position, and the downward movement of the upper ejector pin 636 can push the lower ejector pin 635 to move downward to the initial position, as shown in fig. 17, so as to close the door 623.

The utility model can realize the intelligent management of the sub-bolt 30 and the main bolt 20 through the arranged oven key management system, can monitor the opening and closing states of the oven door 623, ensures the safe production of the oven 60, and compared with the prior art, the door lock assembly does not need to be connected with a controller through a cable, can reduce the use of the cable in a production area, simplifies the structure and is convenient to operate. Through the lock subassembly that sets up, unlocking, closing the lock through sub-bolt 30 is more convenient, and the switch of chamber door 623 is also more convenient, uses in a flexible way, very big satisfied the user demand.

While the preferred embodiment of the present utility model has been described in detail, the present utility model is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model, and these equivalent modifications or substitutions are included in the scope of the present utility model as defined in the appended claims.

Claims

1. The utility model provides a baking oven key management system which characterized in that, includes sub bolt, sub key management device and the main bolt that is used for unblanking or locking door lock assembly, sub key management device includes sub bolt box, first main switch assembly and sub electromagnetic limit assembly, the top of sub bolt box is equipped with the first main bolt hole that is used for supplying the main bolt inserts and is used for supplying the sub bolt inserts, first main switch assembly is used for switching on the main electromagnetic circuit when the main bolt inserts in the first main bolt hole, and is used for breaking off the main electromagnetic circuit when the main bolt is pulled out from first main bolt hole, sub electromagnetic limit assembly is used for losing electricity when main electromagnetic circuit breaks and is located the restriction position in order to stop sub bolt inserts in the sub bolt hole or stop sub bolt hole in, and is used for obtaining electricity when main electromagnetic circuit switch-on and be located the return in order to make sub can insert in the sub bolt hole or sub bolt can pull out from in the sub bolt hole.

2. The oven key management system of claim 1, wherein the sub-key management device further comprises a sub-switch assembly for switching on a sub-electromagnetic circuit when the sub-plug is inserted into a sub-plug pin hole and for switching off a sub-electromagnetic circuit when the sub-plug is pulled out of the sub-plug pin hole, and a first main electromagnetic limit assembly for switching off the sub-electromagnetic circuit when the sub-electromagnetic circuit is switched off and in a limit position to block the main plug from being pulled out of the first main plug pin hole, and for switching on and in a retract position to enable the main plug to be pulled out of the first main plug pin hole.

3. The oven key management system of claim 2, wherein the number of main pins is one or more, and the number of first main pin holes, first main switch assemblies, first main electromagnetic limit assemblies corresponds to the number of main pins; the number of the sub-bolts is one or more, and the number of the sub-bolt holes, the sub-electromagnetic limiting assemblies and the sub-switch assemblies corresponds to the number of the sub-bolts.

4. The oven key management system of claim 2, wherein a first main partition plate and the first main electromagnetic limiting assembly are arranged in the sub-plug box body at one side of the first main plug pin hole, a sub partition plate and the sub electromagnetic limiting assembly are respectively arranged at one side of the sub-plug pin hole, each of the sub electromagnetic limiting assembly and the first main electromagnetic limiting assembly comprises an electromagnet and a limiting pin at one side of the electromagnet, an armature is arranged at one side of the limiting pin close to the electromagnet, and one end of the electromagnet is opposite to the armature;

in the sub electromagnetic limiting assembly, the limiting pin is positioned between the electromagnet and the sub bolt hole, one end, far away from the armature, of the electromagnet is arranged on the sub baffle plate, a sub limiting hole is formed in the inner wall of the sub bolt hole, the electromagnet is used for losing electricity and cutting off the adsorption of the armature of the limiting pin when the main electromagnetic circuit is disconnected so that the limiting pin is positioned at a limiting position, and is used for obtaining electricity and adsorbing the armature of the limiting pin when the main electromagnetic circuit is connected so that the limiting pin is positioned at a retracting position, when the limiting pin is positioned at the retracting position, the first end of the limiting pin is positioned in the sub limiting hole, and when the limiting pin is positioned at the limiting position, the first end of the limiting pin passes through the sub limiting hole and is clamped with the concave position of the sub bolt or stretches into the sub bolt hole;

In the first main electromagnetic limiting assembly, the limiting pin is located between the electromagnet and the first main bolt hole, one end, away from the armature, of the electromagnet is arranged on the first main partition plate, a first main limiting hole is formed in the inner wall of the first main bolt hole, the electromagnet is used for losing electricity and breaking the adsorption of the armature of the limiting pin when the sub electromagnetic circuit is disconnected so that the limiting pin is located at a limiting position, and is used for getting electricity and adsorbing the armature of the limiting pin when the sub electromagnetic circuit is connected so that the limiting pin is located at a retracting position, when the limiting pin is located at the retracting position, the first end of the limiting pin is located in the first main limiting hole, and when the limiting pin is located at the limiting position, the first end of the limiting pin penetrates through the first main limiting hole and is clamped with the concave position of the main bolt.

5. The oven key management system of claim 4, wherein the sub-electromagnetic limit assembly and the first main electromagnetic limit assembly each comprise a connecting rod and a tensile spring;

in the sub electromagnetic limiting assembly, one end of the connecting rod is arranged on the sub partition board, the other end of the connecting rod faces the sub bolt hole and is rotatably connected with the limiting pin, and the stretching elastic piece is connected between the second end of the limiting pin and the sub partition board;

In the first main electromagnetic limiting assembly, one end of the connecting rod is arranged to the first main partition board, the other end of the connecting rod faces the first main bolt hole and is rotatably connected with the limiting pin, and the stretching elastic piece is connected between the second end of the limiting pin and the first main partition board.

6. The oven key management system of claim 1, further comprising a master key management device, a power source and a controller, wherein the master key management device comprises a master latch housing and a second master switch assembly, a second master latch hole for inserting the master latch is formed in the top end of the master latch housing, the second master switch assembly is connected between the controller and the negative pole of the power source and forms a total electromagnetic circuit with the controller and the negative pole of the power source, the second master switch assembly is used for switching on the total electromagnetic circuit and outputting a conducting signal to the controller when the master latch is inserted into the second master latch hole, and switching off the total electromagnetic circuit when the master latch is pulled out from the second master latch hole, and the controller is used for controlling starting of the oven to perform heating and drying operation when the conducting signal is received.

7. The oven key management system of claim 6, wherein a second main electromagnetic limit assembly is disposed in the main plug housing on a side of the second main plug pin hole, the second main electromagnetic limit assembly being connected between the controller and a negative pole of the power supply and forming a secondary electromagnetic loop with the controller and the negative pole of the power supply, the controller being configured to control the secondary electromagnetic loop to be turned off and to control the secondary electromagnetic loop to be turned on when the on signal is received, the second main electromagnetic limit assembly being configured to be de-energized and in a limit position to block the main plug pin from being pulled out of the second main plug pin hole when the secondary electromagnetic loop is turned on, and configured to be energized and in a retract position to enable the main plug pin to be pulled out of the second main plug pin hole when the secondary electromagnetic loop is turned on.

8. The oven key management system of claim 7, wherein the second primary electromagnetic limit assembly is identical in structure to the secondary electromagnetic limit assembly.

9. An oven apparatus comprising an oven, further comprising an oven key management system according to any one of claims 1-8, the oven comprising a housing and a door lock assembly, a door frame being provided on a front side of the housing, a door being provided at a void of the door frame, the door lock assembly being provided on the door frame and the door, a sub-plug of the oven key management system being adapted to unlock or lock the door lock assembly to effect opening or closing of the door.

10. The oven equipment according to claim 9, wherein the door lock assembly comprises a fixing seat, a handle, a lower ejector pin, an upper ejector pin, an ejector pin elastic piece and a buckle, the fixing seat is arranged in a through hole of the door, the handle is arranged in a mounting hole of the fixing seat in a penetrating manner and can rotate relative to the fixing seat, the handle is provided with a lock hole for inserting the sub-ejector pin 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 communicated with the first through groove, the lower ejector pin is arranged in the first through groove, 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 bottom end of the upper ejector pin extends into the first through groove and is in contact with the top end of the lower ejector pin, the ejector pin elastic piece is arranged in the second through groove, one end of the second through groove, which is far away from the first through groove, and the lower ejector pin, the upper ejector pin and the upper ejector pin can move along the first through groove and the second through groove, the upper ejector pin and the buckle are arranged in the second through groove, and the buckle is in contact with the second through groove; the inner diameter of the first through groove gradually increases along the direction close to the second through groove, and the size and the shape of the lower ejector pin are matched with those of the first through groove.