A line equipment cover for an automatic electromagnetic security door system
The automatic electromagnetic safety door system utilizes the combination of permanent magnets and electromagnets, along with mechanical structures and microswitches, to reliably lock and unlock doors in the event of a power outage. This solves the problem of accidental opening of protective doors on production line equipment during power failures and improves the overall performance of safety protection equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU HAOZHI INTELLIGENT TECH CO LTD
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-21
AI Technical Summary
The safety doors of existing production line equipment are prone to accidental opening in the event of a power outage, and there is no way to distinguish between normal opening and accidental opening, indicating that the safety protection logic is not rigorous.
The automatic electromagnetic safety door system utilizes the combination of permanent magnets and electromagnets, along with mechanical structures and microswitches, to achieve purely mechanical automatic locking and unlocking, ensuring that the door can only operate when it is fully closed.
Even in the event of a power outage, the door can still be reliably locked. Automatic unlocking is achieved through mechanical structure and spring force, ensuring that the safety door can only operate when it is fully closed, thus improving the overall performance of the safety protection equipment.
Smart Images
Figure CN122428818A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of equipment cover safety. Background Technology
[0002] Common production line equipment safety doors often use electromagnetic locks or simple locks with electronic monitoring. However, electromagnetic locks rely on continuous power to maintain the locked state. If the production line suddenly fails and loses power, the lock can still be opened after the electromagnet loses its magnetism. However, in some cases, the door may be accidentally opened, resulting in a failure of safety protection. Furthermore, it cannot distinguish between normal opening and accidental opening, indicating that the system logic is not rigorous enough. Summary of the Invention
[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a production line equipment cover for an automatic electromagnetic safety door system, thereby improving the overall performance of safety protection equipment.
[0004] Technical Solution: To achieve the above objectives, the present invention provides an automatic electromagnetic safety door lock system for production line equipment, comprising a production line equipment cover, wherein a plurality of automatic electromagnetic safety doors are arranged in an array on both sides of the production line equipment cover, and the structure of the side of the production line equipment cover includes at least a door frame upper beam and a door frame vertical beam; one side of the automatic electromagnetic safety door is rotatably connected to the door frame vertical beam of the production line equipment cover via a hinge; each electromagnetic safety door corresponds to a set of automatic electromagnetic safety lock components, the automatic electromagnetic safety lock components including a lock tongue housing and a lock body housing that cooperate with each other; the lock tongue housing is fixed to the upper inner side of the automatic electromagnetic safety door away from the hinge by a housing support a; the lock body housing is fixed to the lower inner edge of the door frame upper beam by a housing support b; the lock body housing has a lock tongue insertion channel and a permanent magnet column movable channel that is perpendicularly connected to the middle of the lock tongue insertion channel; the lock tongue housing is provided with a lock tongue mounting compartment and a columnar lock tongue body whose tail end is installed in the lock tongue mounting compartment; when the electromagnetic safety door is closed, the columnar lock tongue body is coaxially inserted into the lock tongue insertion channel.
[0005] Furthermore, a permanent magnet column is coaxially arranged within the movable channel of the permanent magnet column. A permanent magnet column limiting ring is coaxially fixedly installed in the inner cavity of the movable channel of the permanent magnet column near the locking tongue insertion channel. An annular spring support is fixedly arranged on the outer edge of the permanent magnet column. An annular fixed inner edge is coaxially fixed within the movable channel of the permanent magnet column. A thrust spring is arranged between the annular spring support and the annular fixed inner edge. The inner rings of the annular fixed inner edge and the permanent magnet column limiting ring are both coaxially movable with the outer wall surface of the permanent magnet column. In the initial state, the annular spring support on the permanent magnet column is limited to contact the permanent magnet column limiting ring under the thrust of the thrust spring, so that the permanent magnet column enters the initial stable state.
[0006] Furthermore, an electromagnet unit coaxial with the permanent magnet column is fixedly installed inside the lock body. In the initial state, one end of the electromagnet maintains a certain distance from the tail end of the permanent magnet column. When the electromagnet is energized, it attracts the permanent magnet column.
[0007] Furthermore, the inner ring of the opening end of the latch mounting compartment is fixedly provided with a latch constraint inner edge; a ring groove is provided on the outer wall of the columnar latch body near the tail end, and the latch constraint inner edge is coaxially and movablely locked in the ring groove, thereby constraining the displacement of the columnar latch body in the axial direction.
[0008] Furthermore, a turntable is coaxially fixed at the tail end of the cylindrical latch body; a torque spring is coaxially arranged inside the latch mounting chamber to apply clockwise torque to the turntable; a limiting protrusion a is integrally provided on the outer ring of the rotating limiting turntable, and a limiting protrusion b is provided on the inner wall of the latch mounting chamber; under the torque of the torque spring, the limiting protrusion a rotates with the rotating limiting turntable to limit the limiting protrusion b on the inner wall of the latch mounting chamber, thereby bringing the rotating limiting turntable into a stable state, which is the initial state.
[0009] Furthermore, the central part of the cylindrical latch has an irregularly shaped cylindrical segment; the cross-sectional profile of the irregularly shaped cylindrical segment is a closed loop with a smooth transition of the irregular curved surface profile. In the initial state, the local curved surfaces of the irregularly shaped cylindrical segment near and away from the permanent magnet column are denoted as surface a and surface b, respectively; the distance between the surface of surface a and the axis of the cylindrical latch is less than the radius of the cylindrical part of the cylindrical latch, thus forming a groove on surface a of the irregularly shaped cylindrical segment; in the initial state, the end of the permanent magnet column is inserted into the groove; the distance between the surface of surface b and the axis of the cylindrical latch is exactly equal to the radius of the cylindrical part of the cylindrical latch, thus making the arc surface of surface b coincide with the cylindrical surface of the cylindrical latch.
[0010] Furthermore, the end of the cylindrical locking tongue is provided with a chamfered surface; a coupling groove is provided on the end face of the cylindrical locking tongue, the coupling groove is in the shape of a horizontal "I"; a micro switch is provided at the bottom of the coupling groove; a coupling shaft is provided on the end of the locking tongue insertion channel away from the insertion end through a bearing and rotates coaxially; a horizontal "I" shaped coupling tongue is integrally provided on the end of the coupling shaft near the cylindrical locking tongue; in the locked state, the coupling tongue is inserted into the coupling groove, and the coupling tongue presses the micro switch at the bottom of the coupling groove; the end of the coupling shaft away from the coupling tongue extends out of the b housing support and is vertically fixed to the auxiliary handle outside the b housing support; the auxiliary handle is fixed to the outer wall of the b housing support by an easily detachable fastener.
[0011] Furthermore, when the door needs to be opened, the control system energizes the electromagnet, which attracts the permanent magnet column, causing the permanent magnet column to automatically retract and disengage from the slot, thereby unlocking the door. At this time, as long as the micro switch at the bottom of the coupling slot is still pressed, the electromagnet remains energized. When the electromagnetic lock safety door is manually opened, the columnar lock tongue disengages from the lock tongue insertion channel. The system recognizes that the micro switch at the bottom of the coupling slot has been released, and at this time it is determined that the electromagnetic lock safety door has been opened. At this time, the control electromagnet is de-energized, and the end of the permanent magnet column re-enters the lock tongue insertion channel.
[0012] When the production line equipment enclosure suddenly loses power, the staff trapped inside the enclosure disassemble the easily detachable fasteners and then turn the power lever counterclockwise by hand. This causes the coupling shaft to drive the columnar locking tongue to overcome the torque of the torque spring and rotate 180° counterclockwise under the coupling of the coupling tongue and the coupling groove. After the irregular column section rotates 180°, the curved surface b side rotates to the position of the curved surface a side.
[0013] Beneficial effects: The columnar locking tongue body of this solution has an irregular columnar section in the middle section. The cross-sectional profile of the irregular columnar section is a closed-loop smooth curved surface, with an inwardly recessed groove on one side and flush with the cylindrical surface of the locking tongue on the other side.
[0014] When the door is closed, the chamfered surface at the end of the latch automatically pushes open the permanent magnet column that extends into the channel. After the latch is fully in place, the permanent magnet column is driven into the slot by the spring, achieving a purely mechanical automatic locking. When the door is opened normally, the control system briefly energizes the electromagnet to attract the permanent magnet column out of the slot, thus unlocking the door. At the same time, the micro switch in the coupling groove on the end face of the latch provides precise feedback on the door status, ensuring that the production line can only operate when the door is fully closed and the coupling is in place.
[0015] In the event of an unexpected power outage on the production line, trapped personnel only need to remove the easily removable external fasteners and operate the assist handle. The coupling shaft and coupling groove work together in a straight line to rotate the locking tongue, causing the side of the irregularly shaped column segment that was originally coplanar with the cylindrical surface to turn towards the permanent magnet column. The curved surface then pushes the permanent magnet column back, allowing the door to be unlocked from the inside without relying on any electricity. This system is completely independent of the electrical system, enhancing the overall performance of the safety protection equipment. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure;
[0017] Figure 2 This is a schematic diagram of the safety door structure;
[0018] Figure 3 This is a schematic diagram of the automatic electromagnetic safety lock assembly.
[0019] Figure 4 This is an internal sectional view of the automatic electromagnetic safety lock assembly structure;
[0020] Figure 5 This is a schematic diagram of the locking tongue drive structure. Detailed Implementation
[0021] The invention will now be further described with reference to the accompanying drawings.
[0022] As attached Figures 1 to 5The diagram illustrates an automatic electromagnetic safety door lock system for production line equipment. The system includes a production line equipment cover 42, with several automatic electromagnetic safety doors 4 arranged in an array on both sides. The side structure of the production line equipment cover 42 includes at least a door frame upper beam 1 and a door frame vertical beam. One side of each automatic electromagnetic safety door 4 is rotatably connected to the door frame vertical beam of the production line equipment cover 42 via a hinge 3. The production line equipment cover 42 is a closed protective cover made of a metal frame and transparent viewing panels, used to physically isolate high-speed, high-temperature, or potentially pinch-injury equipment areas in an automated production line from external operators. The multiple automatic electromagnetic safety doors 4 arranged in an array on both sides correspond to different workstations on the production line.
[0023] Each electromagnetic lock safety door 4 corresponds to a set of automatic electromagnetic safety lock components 51. The automatic electromagnetic safety lock components 51 include a latch housing 6 and a lock body housing 7 that cooperate with each other. The latch housing 6 is fixed to the upper inner side of the automatic electromagnetic lock safety door 4 away from the hinge 3 by a housing support 5. The lock body housing 7 is fixed to the lower inner edge of the upper beam 1 of the door frame by a housing support 8. The latch housing 6 moves with the safety door, and the lock body housing 7 is fixed to the door frame. The two are precisely aligned only when the safety door is fully closed. The a housing support 5 and the b housing support 8 are sheet metal parts with fine-tuning elongated holes.
[0024] The lock body housing 7 is provided with a lock tongue insertion channel 18 and a permanent magnet column movable channel 23 that is perpendicularly connected to the middle of the lock tongue insertion channel 18; the permanent magnet column movable channel 23 is arranged perpendicular to the lock tongue insertion direction.
[0025] The latch housing 6 is provided with a latch mounting compartment 28 and a columnar latch body 12 with its tail end installed in the latch mounting compartment 28; the latch mounting compartment 28 is a cylindrical cavity, and its axis is completely coincident with the axis of the latch insertion channel 18 when the safety door is closed.
[0026] When the electromagnetic lock safety door 4 is closed, the cylindrical lock tongue 12 is inserted coaxially into the lock tongue insertion channel 18, and the inner diameter of the lock tongue insertion channel 18 is slightly larger than the outer diameter of the cylindrical lock tongue 12; this gap is controlled between 0.1mm and 0.3mm.
[0027] A permanent magnet column 24 is coaxially arranged within the permanent magnet column movable channel 23. A permanent magnet column limiting ring 21 is coaxially fixedly installed in the inner cavity of one end of the permanent magnet column movable channel 23 near the lock tongue insertion channel 18. An annular spring support 34 is fixedly arranged on the outer edge of the permanent magnet column 24. An annular fixed inner edge 32 is coaxially fixed within the permanent magnet column movable channel 23. A thrust spring 33 is arranged between the annular spring support 34 and the annular fixed inner edge 32. The inner rings of the annular fixed inner edge 32 and the permanent magnet column limiting ring 21 are both coaxially movable with the outer wall surface of the permanent magnet column 24. In the initial state, the annular spring support 34 on the permanent magnet column 24 is limited to contact the permanent magnet column limiting ring 21 under the thrust of the thrust spring 33, thereby allowing the permanent magnet column 24 to enter the initial stable state. The thrust spring 33 is a helical compression spring, and its preload ensures that the end of the permanent magnet column 24 stably extends into the lock tongue insertion channel 18 in the unenergized state.
[0028] An electromagnet 25 unit, coaxial with the permanent magnet post 24, is also fixedly installed inside the lock body housing 7. In the initial state, one end of the electromagnet 25 maintains a certain distance from the tail end of the permanent magnet post 24. When the electromagnet 25 is energized, it exerts an attractive force on the permanent magnet post 24. The set value of this distance is greater than the depth of the slot 26 of the irregular column segment 29 of the columnar lock tongue body 12, so as to ensure that the engagement stroke of the electromagnet 25 is sufficient to completely pull the permanent magnet post 24 out of the slot 26, thereby unlocking the lock. The electromagnet 25 is preferably a DC solenoid push-pull electromagnet.
[0029] The inner ring of the opening end of the latch mounting compartment 28 is fixedly provided with a latch constraint inner edge 13; a ring groove 48 is provided on the outer wall of the columnar latch body 12 near the tail end, and the latch constraint inner edge 13 is coaxially and movably engaged in the ring groove 48, thereby constraining the displacement of the columnar latch body 12 in the axial direction; a turntable 11 is fixedly provided coaxially at the tail end of the columnar latch body 12; the cooperation between the latch constraint inner edge 13 and the ring groove 48 allows the columnar latch body 12 to rotate freely while strictly limiting its axial movement range, ensuring that the extension length of the columnar latch body 12 is constant.
[0030] A torque spring 10 is coaxially disposed inside the latch mounting chamber 28, applying clockwise torque to the turntable 11; a limiting protrusion 32 (a) is integrally provided on the outer ring of the rotating limiting turntable 11, and a limiting protrusion (b) is provided on the inner wall of the latch mounting chamber 28; the torque spring 10 is a helical torsion spring, one end of which is inserted into the notch of the turntable 11, and the other end is fixed to the latch housing 6. The cooperation between the limiting protrusion 32 (a) and the limiting protrusion (b) constitutes a rigid stop point of the rotation stroke, so that the cylindrical latch body 12 is always in the predetermined initial angle position in the free state.
[0031] Under the torque of the torque spring 10, the a-limiting protrusion 32 rotates with the rotating limiting turntable 11 to the b-limiting protrusion on the inner wall of the limiting engagement lock tongue mounting chamber 28, thereby causing the rotating limiting turntable 11 to enter a stable state, which is the initial state; this initial state corresponds to the position of the slot 26 of the irregular column segment 29 on the columnar lock tongue body 12 facing the permanent magnet column 24, ensuring that the permanent magnet column 24 can accurately fall into the slot 26 to form a lock after the door is closed.
[0032] The central part of the columnar locking tongue 12 has an irregular columnar segment 29; the cross-sectional profile of the irregular columnar segment 29 is a closed loop with a smooth transition of irregular curved surface profile. In the initial state, the local curved surfaces of the irregular columnar segment 29 on the side closer to the permanent magnet column 24 and the side farther away from the permanent magnet column 24 are respectively denoted as curved surface a side 29a and curved surface b side 29b; the profile of the irregular columnar segment 29 adopts a variable diameter curved surface design based on Archimedean spiral or eccentric circular arc, so that the radial depth of the contact between the columnar locking tongue 12 and the permanent magnet column 24 changes continuously during the rotation.
[0033] The distance between the surface of curved surface a side 29a and the axis of the columnar locking tongue 12 is less than the radius of the cylindrical part of the columnar locking tongue 12, thereby forming a groove 26 on the curved surface a side 29a of the irregular columnar segment 29. In the initial state, the end of the permanent magnet column 24 is inserted into the groove 26. After the end of the permanent magnet column 24 is inserted into the groove 26, under the action of the axial pulling force, the inclined surface of the groove 26 will generate a lateral component force on the permanent magnet column 24. However, the direction of this component force is perpendicular to the direction of movement of the permanent magnet column and cannot overcome the preload of the thrust spring 33 to push the permanent magnet column out.
[0034] The distance between the surface of curved side b 29b and the axis of the cylindrical locking tongue 12 is exactly equal to the radius of the cylindrical part of the cylindrical locking tongue 12, so that the arc surface of curved side b 29b coincides with the cylindrical surface of the cylindrical locking tongue 12. When curved side b 29b rotates to the position facing the permanent magnet column 24, the irregular column segment 29 at this angle position is equivalent to restoring the cylindrical shape, no longer providing the slot space to accommodate the end of the permanent magnet column 24. At this time, the end of the permanent magnet column 24 is held by the complete cylindrical surface of the irregular column segment 29 and remains in the retracted state.
[0035] The end of the columnar latch body 12 is provided with a chamfered surface 17; a coupling groove 16 is provided on the end surface of the columnar latch body 12, and the coupling groove 16 is in the shape of a horizontal "I"; a micro switch is provided at the bottom of the coupling groove 16; a coupling shaft 20 is provided on the end of the latch insertion channel 18 away from the insertion end through a bearing and rotates coaxially; a horizontal "I" shaped coupling tongue 19 is integrally provided on the end of the coupling shaft 20 near the columnar latch body 12; in the locked state, the coupling tongue 19 is inserted into the coupling groove 16, and the coupling tongue 19 presses the micro switch at the bottom of the coupling groove 16; the taper of the chamfered surface 17 is 30° to 45°, and its function is to gradually push open the permanent magnet column 24 inserted into the latch insertion channel 18 during the closing process, so as to achieve automatic relocation. The micro switch at the bottom of the coupling groove 16 is a waterproof and dustproof micro switch, and its contact protrudes slightly from the bottom plane of the groove. When the coupling tongue 19 is fully embedded in the coupling groove 16, it is reliably triggered and outputs a switching signal.
[0036] The end of the coupling shaft 20 away from the coupling tongue 19 extends out of the b-shell support 8 and is vertically fixed to the auxiliary handle 9 outside the b-shell support 8. The auxiliary handle 9 is fixed to the outer wall of the b-shell support 8 by an easily detachable fastener 54. The auxiliary handle 9 allows an adult operator to easily turn it without additional tools in an emergency, overcoming the torque of the torque spring 10 to achieve rotational unlocking. The easily detachable fastener 54 can be a hand-operated wing nut, quick-release pin, or magnetic fixing block, etc., and can be quickly disassembled without the use of special tools in an emergency situation of power failure.
[0037] As the closing process nears its end, the cylindrical latch 12 gradually inserts into the latch insertion channel 18. The chamfered surface 17 at the end of the cylindrical latch 12, through its conical structure, causes the permanent magnet column 24, which was originally vertically inserted into the latch insertion channel 18, to retract into the permanent magnet column movable channel 23. Then, when the cylindrical latch 12 is fully inserted into the latch insertion channel 18, the end of the permanent magnet column 24, pushed by the thrust spring 33, re-inserts into the latch insertion channel 18 and inserts into the slot 26 to achieve automatic locking. Simultaneously, the coupling tongue 19 inserts into the coupling groove 1. In step 6, the coupling tongue 19 presses the micro switch at the bottom of the coupling groove 16, and the control system determines that the electromagnetic lock safety door 4 is in a fully closed state by the state of the micro switch at the bottom of the coupling groove 16. This automatic locking process is completed entirely by mechanical structure and spring force without any electrical control intervention. The micro switch signal is also used to feed back the door lock status to the production line control system. Only when the micro switch is reliably triggered, that is, when the coupling tongue 19 is fully embedded in the coupling groove 16, can the production line start the dangerous action; otherwise, the equipment will be in a safe stop state.
[0038] When the door needs to be opened, the control system energizes the electromagnet 25, which attracts the permanent magnet column 24, causing it to automatically retract and disengage from the slot 26, thus unlocking the door. As long as the microswitch at the bottom of the coupling groove 16 remains pressed, the electromagnet 25 remains energized. When the electromagnetic lock safety door 4 is manually opened, the cylindrical latch 12 disengages from the latch insertion channel 18. The system detects that the microswitch at the bottom of the coupling groove 16 has been released, indicating that the electromagnetic lock safety door 4 has been opened. At this point, the control system de-energizes the electromagnet 25, and the end of the permanent magnet column 24 re-enters the latch insertion channel 18. This logic design, which maintains the electromagnet 25's energization, prevents the latch from relocking if the door is not opened promptly after unlocking, providing the operator with ample opening response time. Simultaneously, once the safety door is opened, the control system immediately cuts off the power supply to the electromagnet 25, resetting the permanent magnet column 24 and preparing for automatic locking upon the next closing.
[0039] When the production line equipment cover 42 suddenly loses power, the staff trapped inside the production line equipment cover 42 can disassemble the easily detachable fastener 54 and then manually turn the power assist handle 9 counterclockwise. This causes the coupling shaft 20 to drive the columnar locking tongue 12 to overcome the torque of the torque spring 10 and rotate counterclockwise by 180° under the coupling of the coupling tongue 19 and the coupling groove 16. After the irregular column section 29 rotates 180°, the curved surface b side 29b rotates to the position of the curved surface a side 29a. Since the curved surface b side 29b and the cylindrical surface of the columnar locking tongue 12 are coplanar, the columnar locking tongue 12 automatically retracts into the permanent magnet column moving channel 23, thereby enabling the electromagnetic lock safety door 4 to be opened inside the production line equipment cover 42 in an emergency.
[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A production line equipment cover for an automatic electromagnetic safety door lock system, comprising a production line equipment cover (42), characterized in that: Several automatic electromagnetic lock safety doors (4) are arranged in an array on both sides of the production line equipment cover (42). The structure of the side of the production line equipment cover (42) includes at least the upper beam (1) of the door frame and the vertical beam of the door frame. One side of the automatic electromagnetic lock safety door (4) is rotatably connected to the vertical beam of the door frame of the production line equipment cover (42) by a hinge (3). Each electromagnetic lock safety door (4) corresponds to a set of automatic electromagnetic safety lock components (51). The automatic electromagnetic safety lock components (51) include a lock tongue housing (6) and a lock body housing (7) that cooperate with each other. The lock tongue housing (6) is fixed to the upper inner side of the automatic electromagnetic lock safety door (4) away from the hinge (3) by a housing support (5). The lock body housing (7) is fixed to the lower inner side of the upper beam (1) of the door frame by b housing support (8). The lock body housing (7) has a lock tongue insertion channel (18) and a permanent magnet column movable channel (23) that is vertically connected to the middle of the lock tongue insertion channel (18). The lock tongue housing (6) is provided with a lock tongue mounting compartment (28) and a columnar lock tongue body (12) whose tail end is installed in the lock tongue mounting compartment (28). When the electromagnetic lock safety door (4) is closed, the columnar lock tongue body (12) is inserted into the lock tongue insertion channel (18) coaxially.
2. The production line equipment cover of the automatic electromagnetic safety door lock system according to claim 1, characterized in that: A permanent magnet column (24) is coaxially arranged in the permanent magnet column movable channel (23). A permanent magnet column limiting ring (21) is coaxially fixedly installed in the inner cavity of the permanent magnet column movable channel (23) near the locking tongue insertion channel (18). An annular spring support (34) is fixedly arranged on the outer edge of the permanent magnet column (24). An annular fixed inner edge (32) is coaxially fixed in the permanent magnet column movable channel (23). A thrust spring (33) is arranged between the annular spring support (34) and the annular fixed inner edge (32). The inner rings of the annular fixed inner edge (32) and the permanent magnet column limiting ring (21) are coaxially movable with the outer wall surface of the permanent magnet column (24). In the initial state, the annular spring support (34) on the permanent magnet column (24) is limited to contact the permanent magnet column limiting ring (21) under the thrust of the thrust spring (33), so that the permanent magnet column (24) enters the initial stable state.
3. The production line equipment cover of the automatic electromagnetic safety door lock system according to claim 2, characterized in that: The lock body shell (7) is also fixedly installed with an electromagnet (25) unit that is coaxial with the permanent magnet column (24). In the initial state, one end of the electromagnet (25) and the tail end of the permanent magnet column (24) maintain a certain distance. When the electromagnet (25) is energized, the electromagnet (25) forms an attractive force on the permanent magnet column (24).
4. The production line equipment cover of the automatic electromagnetic safety door lock system according to claim 3, characterized in that: The inner ring of the opening end of the latch mounting compartment (28) is fixedly provided with a latch constraint inner edge (13); a ring groove (48) is provided on the outer wall of the columnar latch body (12) near the tail end. The latch constraint inner edge (13) is coaxially and movable in the ring groove (48), thereby constraining the displacement of the columnar latch body (12) in the axial direction.
5. The production line equipment cover of the automatic electromagnetic safety door lock system according to claim 4, characterized in that: A turntable (11) is coaxially fixed at the tail end of the columnar lock tongue body (12); a torque spring (10) is coaxially arranged inside the lock tongue mounting chamber (28) to apply clockwise torque to the turntable (11); a limiting protrusion (32) is integrally provided on the outer ring of the rotating limiting turntable (11), and a limiting protrusion (b) is provided on the inner wall of the lock tongue mounting chamber (28); under the torque of the torque spring (10), the limiting protrusion (32) rotates with the rotating limiting turntable (11) to the limiting protrusion (b) on the inner wall of the locking tongue mounting chamber (28), thereby making the rotating limiting turntable (11) enter a stable state, which is the initial state.
6. The production line equipment cover of the automatic electromagnetic safety door lock system according to claim 5, characterized in that: The columnar latch body (12) has a section of irregularly shaped columnar segment (29) in the middle; the cross-sectional profile of the irregularly shaped columnar segment (29) is a closed loop with a smooth transition of irregular curved surface profile. In the initial state, the local curved surfaces of the irregularly shaped columnar segment (29) on the side close to and away from the permanent magnet column (24) are respectively denoted as surface a (29a) and surface b (29b); the distance between the surface of surface a (29a) and the axis of the columnar latch body (12) is less than that of the columnar latch body. (12) The radius of the cylindrical part, so that the curved surface a side (29a) of the irregular column segment (29) forms a slot (26); in the initial state, the end of the permanent magnet column (24) is inserted into the slot (26); the distance between the surface of the curved surface b side (29b) and the axis of the columnar locking tongue (12) is just equal to the radius of the cylindrical part of the columnar locking tongue (12), so that the arc surface of the curved surface b side (29b) coincides with the cylindrical surface of the columnar locking tongue (12).
7. The production line equipment cover of the automatic electromagnetic safety door lock system according to claim 6, characterized in that: The end of the columnar locking tongue (12) is provided with a chamfered surface (17); the end face of the columnar locking tongue (12) is provided with a coupling groove (16), which is in the shape of a horizontal "I"; a micro switch is provided at the bottom of the coupling groove (16); the end of the locking tongue insertion channel (18) away from the insertion end is provided with a coupling shaft (20) that rotates coaxially with a bearing, and the end of the coupling shaft (20) near the columnar locking tongue (12) is integrally provided with a horizontal "I" shaped coupling tongue (19); in the locked state, the coupling tongue (19) is inserted into the coupling groove (16), and the coupling tongue (19) presses the micro switch at the bottom of the coupling groove (16); the end of the coupling shaft (20) away from the coupling tongue (19) extends out of the b housing support (8) and is vertically fixed to the auxiliary handle (9) outside the b housing support (8), and the auxiliary handle (9) is fixed to the outer wall of the b housing support (8) by an easily detachable fastener (54).
8. The operating method of the production line equipment cover of the automatic electromagnetic safety door lock system according to claim 6, characterized in that: When the door needs to be opened, the control system energizes the electromagnet (25), and the electromagnet (25) attracts the permanent magnet column (24), thereby causing the permanent magnet column (24) to automatically retract and disengage from the slot (26), thus unlocking. At this time, as long as the micro switch at the bottom of the coupling groove (16) is still pressed, the electromagnet (25) will always remain energized. When the electromagnetic lock safety door (4) is manually opened, the columnar lock tongue (12) disengages from the lock tongue insertion channel (18). The system recognizes that the micro switch at the bottom of the coupling groove (16) has been released from pressing. At this time, it is determined that the electromagnetic lock safety door (4) has been opened. At this time, the control electromagnet (25) is de-energized, and the end of the permanent magnet column (24) re-enters the lock tongue insertion channel (18). When the production line equipment cover (42) suddenly fails to power, the staff who are trapped inside the production line equipment cover (42) disassemble the easily detachable fastener (54), and then use their hands to turn the power assist handle (9) counterclockwise, so that the coupling shaft (20) drives the columnar locking tongue body (12) to overcome the torque of the torque spring (10) and rotate counterclockwise by 180° under the coupling of the coupling tongue (19) and the coupling groove (16). After the irregular column section (29) rotates 180°, the curved surface b side (29b) rotates to the position of the curved surface a side (29a).