Electromagnetic lock structure and electromagnetic lock system

Abstract

The application relates to the technical field of electromagnetic locks and provides an electromagnetic lock structure and an electromagnetic lock system. The electromagnetic lock structure comprises a mounting frame, a moving frame, a first locking assembly, a second locking assembly and an electromagnet; the moving frame is slidingly matched with the mounting frame, and a limiting column is arranged on the moving frame; the first locking assembly comprises a first lock piece, and the second locking assembly comprises a second lock piece; a first lock groove and a second lock groove are arranged on the first lock piece, and a third lock groove and a fourth lock groove are arranged on the second lock piece; in an unlocking state, an opening is formed between the first lock groove and the third lock groove, and the first lock piece and the second lock piece are both abutted against the limiting column; in a locking state, a first limiting structure is formed between the first lock groove and the third lock groove, a second limiting structure is formed between the second lock groove and the fourth lock groove, and the limiting column is located in the second limiting structure. The application solves the defect that the electromagnetic lock is prone to locking failure in the prior art, and improves the reliability and operation stability of the electromagnetic lock structure.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic lock technology, and in particular to an electromagnetic lock structure and electromagnetic lock system. Background Technology

[0002] In platform screen door systems, electromagnetic locks, as part of the transmission interlocking system, play a role in assisting in controlling the normal opening and closing of sliding platform screen doors to ensure their reliability.

[0003] The related technology discloses a lock structure, including a mounting base plate, a first driving member, a sliding plate, and two locking plates. The top of the sliding plate is bent away from the mounting base plate to form a bend. The output shaft of the first driving member is connected to the bend. The bottom of the sliding plate extends towards the mounting base plate and is provided with a push plate. The push plate is used to connect with a second driving member so that the sliding plate can be driven to move vertically by the first or second driving member. The sliding plate is provided with a limiting post. The locking plates are rotatably connected to the mounting base plate so that the locking plates can rotate between a first working position and a second working position. The two locking plates are arranged facing each other. The locking plates are provided with a lock groove and a hook groove for engaging a locking pin on a sliding door. The configuration is as follows: in the locked state, the limiting post falls into the lock groove and the locking plate is in the first working position; in the unlocked state, the first or second driving member drives the sliding plate to move upward so that the limiting post disengages from the lock groove and the locking plate can rotate to the second working position.

[0004] However, when the locking pin of the sliding door pushes the locking plate to rotate around the hinge point of its mounting base plate and reaches the limit position, the locking plate will generate a certain reaction force on the locking pin. If the lower limit position of the locking pin is far from the upper limit position of the locking plate, the locking pin is likely to pop out of the hook groove under the reaction force of the locking plate, causing the locking pin to pop open when the sliding door is closed, the sliding plate to lock, resulting in locking failure.

[0005] Therefore, there is an urgent need for an electromagnetic lock structure and electromagnetic lock system to solve the above problems. Summary of the Invention

[0006] This invention provides an electromagnetic lock structure and electromagnetic lock system to solve the defect of electromagnetic locks in the prior art that are prone to locking failure, thereby improving the reliability and operational stability of the electromagnetic lock structure.

[0007] The present invention provides an electromagnetic lock structure, comprising: a mounting frame, a movable frame, a first locking component, a second locking component, and an electromagnet; The movable frame is slidably mounted on the mounting frame in a set direction, the electromagnet is mounted on the mounting frame, the movable frame is connected to the output end of the electromagnet, and the movable frame is provided with a limiting post; The first locking assembly includes a first locking plate, and the second locking assembly includes a second locking plate. Both the first locking plate and the second locking plate are rotatably connected to the mounting bracket. The first locking plate is provided with a first locking groove and a second locking groove, and the second locking plate is provided with a third locking groove and a fourth locking groove. In the unlocked state, an opening is formed between the first lock groove and the third lock groove for the sliding door lock pin to pass through, and the first lock piece and the second lock piece both abut against the limiting post, so that the movable frame is in the first position; In the locked state, a first limiting structure is formed between the first lock groove and the third lock groove to limit the sliding door lock pin, and a second limiting structure is formed between the second lock groove and the fourth lock groove. The limiting post is located in the second limiting structure, so that the moving frame is located in the second position.

[0008] According to the electromagnetic lock structure provided by the present invention, the first locking assembly includes two symmetrically arranged first locking plates, both of which are rotatably connected to the mounting bracket; the second locking assembly includes two symmetrically arranged second locking plates, both of which are rotatably connected to the mounting bracket.

[0009] According to the electromagnetic lock structure provided by the present invention, in the unlocked state, the center of gravity of the first locking piece is located below the rotational connection point between the first locking piece and the mounting bracket, so that the first locking piece can return to its initial position under the action of gravity.

[0010] According to the electromagnetic lock structure provided by the present invention, the first locking piece is provided with a first bushing, the mounting bracket is provided with a first hinge shaft, the first bushing is sleeved on the first hinge shaft, and the first locking groove and the second locking groove are located on the same side of the first bushing, so that the center of gravity of the first locking piece is located below the center of the bushing.

[0011] The electromagnetic lock structure provided by the present invention further includes a reset mechanism for driving the second lock piece back to its initial position, the reset mechanism being connected to the second lock piece.

[0012] According to the electromagnetic lock structure provided by the present invention, the reset mechanism includes a counterweight portion disposed on the second lock plate, so that in the unlocked state, the center of gravity of the second lock plate is located below the rotational connection point between the second lock plate and the mounting bracket.

[0013] According to the electromagnetic lock structure provided by the present invention, the reset mechanism includes a reset torsion spring, a second bushing is provided on the second lock plate, a second hinge shaft is provided on the mounting bracket, the second bushing is sleeved on the second hinge shaft, the reset torsion spring is sleeved on the hinge shaft, and the second lock plate is connected to the reset torsion spring.

[0014] According to the electromagnetic lock structure provided by the present invention, a first abutting part is provided between the first lock groove and the second lock groove, and a second abutting part is provided between the third lock groove and the fourth lock groove. In the unlocked state, both the first abutting part and the second abutting part abut against the limiting post.

[0015] The electromagnetic lock structure provided by the present invention further includes a stroke detection mechanism, which is disposed on the mounting frame and is used to detect the position of the movable frame.

[0016] Another aspect of the present invention provides an electromagnetic lock system, including the electromagnetic lock structure as described in any of the preceding claims.

[0017] The electromagnetic lock structure and electromagnetic lock system provided by the present invention, by setting a first locking component and a second locking component on the mounting bracket, in the unlocked state, an opening for the sliding door lock pin to pass through is formed between the first lock groove and the third lock groove, and both the first lock piece and the second lock piece abut against the limiting post, so that the moving bracket is located in the first position; in the locked state, a first limiting structure for limiting the sliding door lock pin is formed between the first lock groove and the third lock groove, a second limiting structure is formed between the second lock groove and the fourth lock groove, and the limiting post is located in the second limiting structure, so that the moving bracket is located in the second position. Under normal circumstances, the distance between the sliding door lock pin and the upper and lower ends of the opening is equal. However, due to long-term use or manual adjustment, the distance between the sliding door lock pin and the upper and lower ends of the opening may deviate. The electromagnetic lock structure provided in this application, when the distance between the sliding door lock pin and the lower end of the opening increases, its distance from the upper end of the opening decreases. After the sliding door lock pin pushes the first and second locking plates to their limit positions, the groove position of the third lock groove (at the upper end of the opening) can block the sliding door lock pin (because during the rotation of the second locking plate, the groove of the third lock groove...). The opening moves towards a height closer to the axis of the sliding door lock pin. In the unlocked state, when the distance between the sliding door lock pin and the upper end of the opening is less than the limit value, the second locking plate can block the sliding door lock pin during rotation (the same applies to the first locking plate), preventing the sliding door lock pin from popping out. Similarly, when the distance between the sliding door lock pin and the upper end of the opening increases, its distance from the lower end of the opening decreases. After the sliding door lock pin pushes the first and second locking plates to rotate to their limit positions, the groove position of the first lock groove (lower end of the opening) can block the sliding door lock pin, preventing it from popping out. Furthermore, in the unlocked state, both the first and second locking plates abut against the limiting post, preventing the moving frame from falling. The electromagnetic lock structure and electromagnetic lock system provided by this invention solve the defect of easy locking failure in existing electromagnetic locks, improving the reliability and operational stability of the electromagnetic lock structure.

[0018] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is one of the schematic diagrams of one embodiment of the electromagnetic lock structure provided by the present invention; Figure 2 This is a second schematic diagram of one embodiment of the electromagnetic lock structure provided by the present invention; Figure 3 This is a third schematic diagram of one embodiment of the electromagnetic lock structure provided by the present invention; Figure 4 This is the fourth schematic diagram of one embodiment of the electromagnetic lock structure provided by the present invention; Figure 5 This is a schematic diagram of the first locking piece in one embodiment of the electromagnetic lock structure provided by the present invention; Figure 6 This is a schematic diagram of the second locking piece in one embodiment of the electromagnetic lock structure provided by the present invention; Figure 7 This is one of the schematic diagrams of a second embodiment of the electromagnetic lock structure provided by the present invention; Figure 8 This is a second schematic diagram of a second embodiment of the electromagnetic lock structure provided by the present invention; Figure 9 This is the third schematic diagram of the second embodiment of the electromagnetic lock structure provided by the present invention; Figure 10 This is the fourth schematic diagram of the second embodiment of the electromagnetic lock structure provided by the present invention; Figure 11 This is a schematic diagram of the first locking plate in a second embodiment of the electromagnetic lock structure provided by the present invention; Figure 12 This is a schematic diagram of the second locking piece in a second embodiment of the electromagnetic lock structure provided by the present invention; Figure 13 This is a schematic diagram of the fixing frame in the electromagnetic lock structure provided by the present invention; Figure 14This is a schematic diagram of the movable frame in the electromagnetic lock structure provided by the present invention.

[0021] Figure label: 1. Mounting bracket; 101. Mounting bracket body; 102. Electromagnet mounting bracket; 103. Stroke detection mechanism mounting bracket; 2. Moving bracket; 3. Electromagnet; 4. Limiting post; 5. First locking plate; 501. First locking groove; 502. Second locking groove; 503. First bushing; 504. First abutment part; 6. Second locking plate; 601. Third locking groove; 602. Fourth locking groove; 603. Counterweight part; 604. Second abutment part; 605. Second bushing; 7. First hinge shaft; 8. Detection device; 9. First connecting arm; 10. Second connecting arm; 11. Roller; 12. Return torsion spring; 13. Second hinge shaft; 14. Sliding door lock pin. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0025] The following is combined Figures 1 to 14 This invention describes the electromagnetic lock structure and electromagnetic lock system provided by the present invention.

[0026] like Figures 1 to 4 The figures shown are schematic diagrams of the electromagnetic lock structure provided in one embodiment of the present invention in the unlocked state and the locked state, respectively. The electromagnetic lock structure includes a mounting frame 1, a movable frame 2, a first locking component, a second locking component, and an electromagnet 3; The movable frame 2 is slidably mounted on the mounting frame 1 along a set direction, the electromagnet 3 is mounted on the mounting frame 1, the movable frame 2 is connected to the output end of the electromagnet 3, and the movable frame 2 is provided with a limit post 4; The first locking assembly includes a first locking plate 5, and the second locking assembly includes a second locking plate 6. The first locking plate 5 and the second locking plate 6 are rotatably connected to the mounting bracket 1. The first locking plate 5 is provided with a first locking groove 501 and a second locking groove 502, and the second locking plate 6 is provided with a third locking groove 601 and a fourth locking groove 602. In the unlocked state, an opening is formed between the first lock groove 501 and the third lock groove 601 for the sliding door lock pin 14 to pass through, and the first lock piece 5 and the second lock piece 6 both abut against the limiting post 4, so that the moving frame 2 is in the first position. In the locked state, a first limiting structure is formed between the first locking groove 501 and the third locking groove 601 to limit the sliding door lock pin 14, and a second limiting structure is formed between the second locking groove 502 and the fourth locking groove 602. The limiting post 4 is located in the second limiting structure, so that the moving frame 2 is in the second position.

[0027] like Figure 13 and Figure 14 As shown, in this embodiment, the mounting frame 1 serves as the overall mounting structure for all components in the electromagnetic lock structure. It provides support and mounting for the remaining components of the electromagnetic lock structure and remains fixed during use. The movable frame 2 is slidably fitted onto the mounting frame 1 and can move downwards or upwards under its own weight or driven by the electromagnet 3. In specific implementation, sliding connectors and vertically oriented sliding grooves can be respectively provided on the mounting frame 1 and the movable frame 2, configuring them into a sliding connection relationship.

[0028] Specifically, such as Figure 1 and Figure 13 As shown, the mounting bracket 1 includes a mounting bracket body 101 and an electromagnet mounting bracket 102. The left and right ends of the electromagnet mounting bracket 102 are fixed to the mounting bracket body 101 by threaded connectors (or welding), and the middle part of the electromagnet mounting bracket 102 is provided with a slot for accommodating the electromagnet 3. The electromagnet 3 is fixed to the middle part of the electromagnet mounting bracket 102 by threaded connectors (or welding).

[0029] like Figure 5As shown, in this embodiment, the first locking groove 501 and the second locking groove 502 are spaced apart from the first locking piece 5, and the first locking groove 501 and the second locking groove 502 are parallel to each other, with a contact portion between the first locking groove 501 and the second locking groove 502. Figure 6 As shown, the third locking groove 601 and the fourth locking groove 602 are spaced apart from the second locking plate 6, and the third locking groove 601 and the fourth locking groove 602 are parallel to each other. A contact portion is also provided between the third locking groove 601 and the fourth locking groove 602. During the locking process, the sliding door lock pin 14 pushes the contact portion of the first locking plate 5 and the second locking plate 6 to rotate the first locking plate 5 and the second locking plate 6 to a set position. Figure 4 As shown, after locking, the first lock groove 501 and the third lock groove 601 form a strip-shaped groove in the direction perpendicular to the mounting bracket 1 to lock the sliding door lock pin 14. Similarly, the second lock groove 502 and the fourth lock groove 602 form a strip-shaped groove in the direction perpendicular to the mounting bracket 1. At this time, the limiting post 4 falls into the strip-shaped groove formed by the second lock groove 502 and the fourth lock groove 602 to limit and fix the first lock piece 5 and the second lock piece 6.

[0030] When unlocking, the output end of the electromagnet 3 drives the moving frame 2 to move upward and reach the set height. Then, the limit post 4 drives the second locking plate 6 to rotate, and the sliding door lock pin 14 moves out of the strip groove formed by the first lock groove 501 and the third lock groove 601. The first locking plate 5 and the second locking plate 6 both return to their initial positions.

[0031] It should be noted that the electromagnetic lock structure provided by this invention can be a single-sided lock structure, meaning that it can only be used on one side. Figure 3 or Figure 4 The left or right side shown in the diagram is provided with a first locking plate 5 and a second locking plate 6 to lock and fix the sliding door lock pin 14 on one side. Alternatively, it can be a double-sided lock structure. In this case, the first locking assembly includes two symmetrically arranged first locking plates 5, both of which are rotatably connected to the mounting bracket 1. The second locking assembly includes two symmetrically arranged second locking plates 6, both of which are rotatably connected to the mounting bracket 1, enabling the locking and fixing of the sliding door lock pin 14 on both sides.

[0032] It should be noted that the first position mentioned above specifically refers to the unlocked state, where the movable frame 2 is fixed under the abutment of the first locking piece 5 and the second locking piece 6, and is located at a set height. The second position mentioned above specifically refers to the locked state, where the limiting post 4 on the movable frame 2 falls into the strip groove formed by the second locking groove 502 and the fourth locking groove 602, and is located at a set height.

[0033] The electromagnetic lock structure and system provided by this invention, by setting a first locking component and a second locking component on the mounting frame 1, forms an opening between the first locking groove 501 and the third locking groove 601 for the sliding door lock pin 14 to pass through in the unlocked state, and both the first locking plate 5 and the second locking plate 6 abut against the limiting post 4, so that the moving frame 2 is in the first position; in the locked state, a first limiting structure for limiting the sliding door lock pin 14 is formed between the first locking groove 501 and the third locking groove 601, and a second limiting structure is formed between the second locking groove 502 and the fourth locking groove 602, with the limiting post 4 located in the second limiting structure, so that the moving frame 2 is in the second position. Under normal circumstances, the distance between the sliding door lock pin 14 and the upper and lower ends of the opening is equal (approximately 2mm), but due to long-term use or manual adjustment, the distance between the sliding door lock pin 14 and the upper and lower ends of the opening may deviate. The electromagnetic lock structure provided in this application, when the distance between the sliding door lock pin 14 and the lower end of the opening increases, its distance from the upper end of the opening decreases. After the sliding door lock pin 14 pushes the first lock plate 5 and the second lock plate 6 to rotate to their extreme positions, the groove position of the third lock groove 601 (upper end of the opening) can block the sliding door lock pin 14. (Because during the rotation of the second lock plate 6, the groove position of the third lock groove 601 will move towards the height of the axis of the sliding door lock pin 14. In the unlocked state, when the sliding door lock pin 14 is far from the upper end of the opening...) When the distance from the upper end of the opening is less than the limit value, the second locking plate can block the sliding door lock pin during rotation (the same applies to the first locking plate 5), preventing the sliding door lock pin 14 from popping out. Similarly, when the distance between the sliding door lock pin 14 and the upper end of the opening increases, its distance from the lower end of the opening decreases. After the sliding door lock pin 14 pushes the first locking plate 5 and the second locking plate 6 to rotate to the limit position, the slot position of the first lock groove 501 (lower end of the opening) can block the sliding door lock pin 14, preventing it from popping out. Furthermore, in the unlocked state, both the first locking plate 5 and the second locking plate 6 abut against the limiting post 4, preventing the moving frame 2 from falling. The electromagnetic lock structure and electromagnetic lock system provided by this invention solve the defect of easy locking failure in existing electromagnetic locks, improving the reliability and operational stability of the electromagnetic lock structure.

[0034] like Figure 1 and Figure 3 As shown, in this embodiment of the invention, in the unlocked state, the center of gravity of the first locking piece 5 is located below the rotational connection point between the first locking piece 5 and the mounting bracket 1 (or in the locked state, the center of gravity of the first locking piece 5 is located above the rotational connection point between the first locking piece 5 and the mounting bracket 1, giving the first locking piece 5 a tendency to rotate towards its initial position), so that the first locking piece 5 can return to its initial position under the action of gravity. Thus, when the electromagnet 3 is unlocked, the first locking piece 5 can return to its initial position under the action of gravity without the need for other driving components to drive it to reset, simplifying the structure.

[0035] like Figure 5 As shown, in this embodiment of the invention, the first locking plate 5 is provided with a first bushing 503, and the mounting bracket 1 is provided with a first hinge shaft 7. The first bushing 503 is sleeved on the first hinge shaft 7 to configure the first locking plate 5 and the first hinge shaft 7 as a hinged connection. The first locking groove 501 and the second locking groove 502 are located on the same side of the first bushing 503 so that the center of gravity of the first locking plate 5 is located below the center of the bushing. Similarly, by providing the first locking groove 501 and the second locking groove 502 on the same side of the first bushing 503, in the unlocked state, the center of gravity of the first locking plate 5 can be located below the center of the bushing (or in the locked state, the center of gravity of the first locking plate 5 can be located above the center of the bushing). Its structure is simple and has strong stability.

[0036] In this embodiment of the invention, the electromagnetic lock structure further includes a reset mechanism for driving the second locking plate 6 back to its initial position, and the reset mechanism is connected to the second locking plate 6. By providing the reset mechanism, it is convenient to return the second locking plate 6 to its initial position after unlocking.

[0037] Specifically, such as Figure 6 As shown, in this embodiment of the invention, the reset mechanism includes a counterweight 603 disposed on the second locking plate 6, so that in the unlocked state, the center of gravity of the second locking plate 6 is located below the rotational connection point between the second locking plate 6 and the mounting bracket 1 (or in the locked state, the center of gravity of the second locking plate is located above the rotational connection point between the second locking plate and the mounting bracket 1, so that the second locking plate 6 has a tendency to rotate back to the initial position). Thus, when the electromagnetic lock structure is unlocked, the second locking plate can return to its initial position under gravity without the need for other driving components to reset it, simplifying the structure.

[0038] like Figure 5 and Figure 6 As shown in this embodiment of the invention, a first abutment portion 504 is provided between the first locking groove 501 and the second locking groove 502, and a second abutment portion 604 is provided between the third locking groove 601 and the fourth locking groove 602. In the unlocked state, both the first abutment portion 504 and the second abutment portion 604 abut against the limiting post 4. By providing the first abutment portion 504 and the second abutment portion 604 on the first locking plate 5 and the second locking plate 6 respectively, in the unlocked state, the first abutment portion 504 and the second abutment portion 604 can simultaneously abut against the limiting post 4, so that the moving frame 2 can be stably maintained in the initial position, reducing the probability of electromagnetic lock structure failure.

[0039] like Figures 1 to 4 As shown in the embodiment of the invention, the electromagnetic lock structure further includes a travel detection mechanism, which is disposed on the mounting frame 1 and is used to detect the position of the movable frame 2. By setting the travel detection mechanism, the position (displacement) of the movable frame 2 can be detected and recorded, thereby issuing an unlocking or locking signal.

[0040] Specifically, in this embodiment, the stroke detection mechanism includes two sets of detection components, which are respectively disposed on both sides of the movable frame 2. Each detection component includes a detection device 8, a first connecting arm 9, a second connecting arm 10, and a roller 11. The detection device 8 is disposed on the mounting frame 1. The first end of the first connecting arm 9 is connected to the detection device 8. The first end of the second connecting arm 10 is hinged to the second end of the first connecting arm 9. A reset element for resetting the second connecting arm 10 is provided on the hinge shaft between the first connecting arm 9 and the second connecting arm 10. The roller 11 is rotatably disposed on the second end of the second connecting arm 10. When the movable frame 2 moves up and down, the roller 11 abuts against both sides of the movable frame 2 and rolls, detecting and recording the position (displacement) of the movable frame 2.

[0041] In this embodiment, guide ramps are provided on both sides of the movable frame 2 to prevent the rollers 11 from being damaged after prolonged contact with the movable frame 2.

[0042] In this embodiment, two sides of the mounting frame body 101 are respectively provided with stroke detection mechanism mounting frames 103 for mounting stroke detection mechanisms. The stroke detection mechanism mounting frames 103 are connected to the mounting frame body 101 by threaded connectors (or welding).

[0043] like Figures 7 to 12 The figures shown are schematic diagrams of the electromagnetic lock structure provided in Embodiment 2 of the present invention in the unlocked and locked states, respectively. The difference between this embodiment and Embodiment 1 is that the reset mechanism for resetting the second locking plate 6 includes a reset torsion spring 12. The second locking plate 6 is provided with a second bushing 605, and the mounting bracket 1 is provided with a second hinge shaft 13. The second bushing 605 is sleeved on the second hinge shaft 13, and the reset torsion spring 12 is sleeved on the hinge shaft. The two second locking plates 6 are respectively connected to the two ends of the reset torsion spring 12. That is, in this embodiment, the second locking plate 6 is reset by the reset torsion spring 12.

[0044] The following provides a detailed explanation of a specific example of the electromagnetic lock structure and its working principle provided by this invention. Please refer to [link / reference]. Figures 1 to 14 .

[0045] The electromagnetic lock structure provided by this invention includes a mounting frame 1, a movable frame 2, a first locking assembly, a second locking assembly, and an electromagnet 3. The mounting frame 1 includes a mounting frame body 101, an electromagnet mounting frame 102, and a stroke detection mechanism mounting frame 103. The electromagnet mounting frame 102 and the stroke detection mechanism mounting frame 103 are used to install and fix the electromagnet 3 and the stroke detection mechanism, respectively. A limiting post 4 is provided at the centerline of the movable frame 2. A first hinge shaft 7 and a second hinge shaft 13 are vertically spaced at the centerline of the mounting frame body 101. Two first locking plates 5 are sleeved on the first hinge shaft 7 via first bushings 503, and two second locking plates 6 are sleeved on the second hinge shaft 13 via second bushings 605. Both first locking plates 5 are reset by gravity, and both second locking plates 6 are reset by a counterweight 603 or a reset torsion spring 12.

[0046] The first locking plate 5 is provided with a first locking groove 501 and a second locking groove 502 that are parallel to each other and spaced apart, and a first abutting part 504 is formed between the first locking groove 501 and the second locking groove 502. The second locking plate 6 is provided with a third locking groove 601 and a fourth locking groove 602 that are parallel to each other and spaced apart, and a second abutting part 604 is formed between the third locking groove 601 and the fourth locking groove 602.

[0047] In the unlocked state, an opening is formed between the first lock groove 501 and the third lock groove 601 for the sliding door lock pin 14 to pass through, and both first lock plates 5 and two second lock plates 6 abut against the limiting post 4, so that the moving frame 2 is in the first position; in the locked state, a first limiting structure is formed between the first lock groove 501 and the third lock groove 601 for limiting the sliding door lock pin 14, and a second limiting structure is formed between the second lock groove 502 and the fourth lock groove 602, with the limiting post 4 located within the second limiting structure, so that the moving frame 2 is in the second position. When the sliding doors on both sides are closed, the sliding door lock pin 14 enters the internal area of ​​the first lock groove 501 and the third lock groove 601 through the opening and comes into contact with the contact parts of the first lock piece 5 and the second lock piece 6. Then, the sliding door lock pin 14 pushes the first lock piece 5 and the second lock piece 6 to rotate. After the first lock piece 5 and the second lock piece 6 rotate to a set angle, the sliding door lock pin 14 is confined within the first limiting structure formed by the first lock groove 501 and the third lock groove 601. The limiting post 4 falls from the first abutment part 504 and the second abutment part 604 into the second limiting structure formed by the second lock groove 502 and the fourth lock groove 602, and limits the two first lock pieces 5 and the two second lock pieces 6 to prevent them from rotating. At this point, the locking is completed.

[0048] Under normal circumstances, the distance between the sliding door lock pin 14 and the upper and lower ends of the opening is equal (approximately 2mm). However, due to long-term use or manual adjustment, the distance between the sliding door lock pin 14 and the upper and lower ends of the opening may deviate. In the electromagnetic lock structure provided in this application, when the distance between the sliding door lock pin 14 and the lower end of the opening increases, its distance from the upper end of the opening decreases. After the sliding door lock pin 14 pushes the first locking plate 5 and the second locking plate 6 to their extreme positions, the slot position of the second lock groove 502 (the upper end of the opening) can block the sliding door lock pin 14 (because during the rotation of the second locking plate 6, the third lock groove 60...). The slot of the first lock groove 501 will move towards the height of the axis of the sliding door lock pin 14. In the unlocked state, when the distance between the sliding door lock pin 14 and the upper end of the opening is less than the limit value, the second lock plate can block the sliding door lock pin during rotation (the same applies to the first lock plate 5), preventing the sliding door lock pin 14 from popping out. Similarly, when the distance between the sliding door lock pin 14 and the upper end of the opening increases, its distance from the lower end of the opening decreases. After the sliding door lock pin 14 pushes the first lock plate 5 and the second lock plate 6 to rotate to the limit position, the slot position of the first lock groove 501 (lower end of the opening) can block the sliding door lock pin 14, preventing the sliding door lock pin 14 from popping out. In the unlocked state, both the first lock plate 5 and the second lock plate 6 abut against the limiting post 4, which can prevent the moving frame 2 from falling. The electromagnetic lock structure and electromagnetic lock system provided by the present invention solve the defect of easy locking failure in the prior art electromagnetic lock, and improve the reliability and operational stability of the electromagnetic lock structure.

[0049] When the door is opened electrically, the coil of the electromagnet 3 is energized for a set time, and an unlocking command is issued through the DCU (Door Control Unit). The output end of the electromagnet 3 drives the moving frame 2 to move upward. After reaching the set height, the limit post 4 drives the second lock plate 6 to rotate, and the sliding door lock pin 14 moves out of the second limit structure formed by the first lock groove 501 and the third lock groove 601. The first lock plate 5 and the second lock plate 6 both return to their initial positions.

[0050] Another aspect of the present invention provides an electromagnetic lock system, including the electromagnetic lock structure as described in any of the preceding embodiments.

[0051] The electromagnetic lock system provided by this invention adopts the above-described electromagnetic lock structure, and therefore also has advantages such as high reliability and high operational stability, which will not be elaborated further.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electromagnetic lock structure, characterized in that, include: Mounting bracket, movable bracket, first locking assembly, second locking assembly, and electromagnet; The movable frame is slidably mounted on the mounting frame in a set direction, the electromagnet is mounted on the mounting frame, the movable frame is connected to the output end of the electromagnet, and the movable frame is provided with a limiting post; The first locking assembly includes a first locking plate, and the second locking assembly includes a second locking plate. Both the first locking plate and the second locking plate are rotatably connected to the mounting bracket. The first locking plate is provided with a first locking groove and a second locking groove, and the second locking plate is provided with a third locking groove and a fourth locking groove. In the unlocked state, an opening is formed between the first lock groove and the third lock groove for the sliding door lock pin to pass through, and the first lock piece and the second lock piece both abut against the limiting post, so that the movable frame is in the first position; In the locked state, a first limiting structure is formed between the first lock groove and the third lock groove to limit the sliding door lock pin, and a second limiting structure is formed between the second lock groove and the fourth lock groove. The limiting post is located in the second limiting structure, so that the moving frame is located in the second position. It also includes a reset mechanism for driving the second locking piece back to its initial position, the reset mechanism being connected to the second locking piece; The reset mechanism includes a counterweight portion disposed on the second locking plate, so that in the unlocked state, the center of gravity of the second locking plate is located below the rotational connection point between the second locking plate and the mounting bracket; A first abutting part is provided between the first locking groove and the second locking groove, and a second abutting part is provided between the third locking groove and the fourth locking groove. In the unlocked state, both the first abutting part and the second abutting part abut against the limiting post.

2. The electromagnetic lock structure according to claim 1, characterized in that, The first locking assembly includes two symmetrically arranged first locking plates, both of which are rotatably connected to the mounting bracket. The second locking assembly includes two symmetrically arranged second locking plates, both of which are rotatably connected to the mounting bracket.

3. The electromagnetic lock structure according to claim 1, characterized in that, In the unlocked state, the center of gravity of the first locking piece is located below the rotational connection point between the first locking piece and the mounting bracket, so that the first locking piece can return to its initial position under the action of gravity.

4. The electromagnetic lock structure according to claim 3, characterized in that, The first locking piece is provided with a first bushing, and the mounting bracket is provided with a first hinge shaft. The first bushing is sleeved on the first hinge shaft, and the first locking groove and the second locking groove are located on the same side of the first bushing, so that the center of gravity of the first locking piece is located below the center of the bushing.

5. The electromagnetic lock structure according to claim 1, characterized in that, The reset mechanism includes a reset torsion spring, a second bushing is provided on the second locking plate, a second hinge shaft is provided on the mounting bracket, the second bushing is sleeved on the second hinge shaft, the reset torsion spring is sleeved on the hinge shaft, and the second locking plate is connected to the reset torsion spring.

6. The electromagnetic lock structure according to any one of claims 1 to 5, characterized in that, It also includes a stroke detection mechanism, which is located on the mounting frame and is used to detect the position of the movable frame.

7. An electromagnetic lock system, characterized in that, Includes the electromagnetic lock structure as described in any one of claims 1 to 6.

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