Linkage type electromagnetic door lock

Abstract

The utility model discloses a linkage type electromagnetic door lock which comprises a cavity and a cavity door arranged at an opening of the cavity, an electromagnet is arranged on the cavity, and a sliding plate moving along with the stroke of the electromagnet is arranged at the output end of the electromagnet. The cavity door is provided with a door hook which abuts against the sliding plate and limits the sliding plate when the door is closed. The cavity is provided with a pushing limiting assembly which abuts against the sliding plate and limits the sliding plate when the door is opened, and the pushing limiting assembly abuts against the door hook and generates pushing force on the door hook when the door is closed. The sliding plate is pushed and pulled by controlling attraction of the electromagnet, the effect of controlling opening and closing of the door is achieved, the problems of door opening caused by misoperation and accidental door opening can be avoided, the use process is reliable, and the safety of experiments can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic door locks, and in particular relates to a linkage type electromagnetic door lock. Background Art

[0002] Existing mechanical door locks are often locked by the cooperation of door hooks and pawls or by inserting a lock tongue into a lock hole. This leads to the following disadvantages in the installation, use and door opening and closing of existing mechanical door locks:

[0003] 1. Existing mechanical door locks often use a hand-pull or button-type door opening method. The door is opened by pulling the door handle or pressing the door opening button. Although this door opening method makes the door opening more convenient; it will cause the door to be opened at will, which will not only affect the experimental results, but may also cause the experimental instrument to be misjudged and shut down, causing the instrument in operation to hurt the user.

[0004] 2. For existing mechanical door locks, when opening the door, the door lock needs to be pressed to the door opening trigger position to open the door. The door opening trigger position is deeper than the door locking position, which results in greater force required to open the door, making the user experience worse.

[0005] 3. With existing mechanical door locks, the closing force required for closing the door continues to increase during the closing action. During the entire closing process, there is no change in the closing force before the door is successfully closed, and there is no change in the closing feel. The closing state cannot be judged, which affects the user experience. Utility Model Content

[0006] The purpose of the utility model is to provide a linkage type electromagnetic door lock to solve the problems raised in the above background technology.

[0007] To achieve the above object, the utility model provides the following technical solution: a linkage electromagnetic door lock, comprising a cavity and a cavity door arranged at the opening of the cavity, wherein:

[0008] The cavity is provided with an electromagnet, and the output end of the electromagnet is provided with a slide plate that moves with the stroke of the electromagnet;

[0009] The cavity is provided with a limit assembly for limiting the travel of the slide plate, and the limit assembly can prevent the slide plate from leaving the cavity;

[0010] The cavity door is provided with a door hook which abuts against the slide plate and limits the slide plate when the door is closed;

[0011] The cavity is provided with a push limit component which abuts against the slide plate and limits the slide plate when the door is opened, and the push limit component abuts against the door hook and generates a thrust on the door hook when the door is closed;

[0012] A switch device is provided on the cavity.

[0013] Preferably, the limiting assembly comprises a limiting groove provided on the slide plate and a limiting member provided on the front cover of the cavity, and the limiting member is provided in the limiting groove and limits the end point of the travel of the limiting groove.

[0014] Preferably, an anti-slipping piece is provided on the limiting piece, the anti-slipping piece exceeds the depth range of the limiting groove and is arranged outside the slide plate, and the anti-slipping piece can prevent the slide plate from escaping from the cavity.

[0015] Preferably, the anti-slip component is designed as a circular structure, and the diameter of the anti-slip component is greater than the width of the limiting groove.

[0016] Preferably, the thrust limit assembly includes a rotating shaft fixed to the cavity, a thrust limit block is provided on the rotating shaft, and the thrust limit block can rotate relative to the cavity through the rotating shaft; a mounting piece is provided on the thrust limit block, a thrust limit spring is provided on the mounting piece, and the other end of the thrust limit spring is fixedly connected to the cavity through a flange plate.

[0017] Preferably, the push limit block is provided with a push limit piece for limiting the position of the slide plate, and the push limit piece can generate thrust on the door hook through the compression and release of the push limit spring.

[0018] Preferably, the push-limiting member abuts against the slide plate and limits the slide plate when the door is opened, and the push-limiting member abuts against the door hook and generates a thrust on the door hook when the door is closed.

[0019] Preferably, the push-limiting spring will undergo elastic deformation under external force, and the door hook will push the push-limiting member when closing the door and drive the mounting member to compress the push-limiting spring through the push-limiting block.

[0020] Preferably, the switch device comprises a proximity switch fixed to the cavity and a proximity member fixed to the slide, and the electromagnet can control the slide to slide to drive the proximity member to contact or separate from the proximity switch.

[0021] Preferably, the door hook is provided with a hook groove which engages with the slide plate when the door is closed, and the slide plate is provided with a clamping groove which engages with the hook groove of the door hook when the door is closed.

[0022] The technical effects and advantages of the utility model are as follows:

[0023] 1. By controlling the attraction of the electromagnet to push and pull the slide, the door can be controlled to open and close, which can avoid opening the door due to misoperation and prevent the problem of accidental door opening. The use process is reliable and can improve the safety of the experiment;

[0024] 2. Through the setting of the push limit component, when the door is opened, the electromagnet is attracted to pull the slide down to release the lock on the door hook. At this time, the push limit component will generate thrust to push the door hook, which can automatically pop open the cavity door. The user does not need to manually open the cavity door, which can improve the user experience;

[0025] 3. Through the setting of the push limit component, when the door is closed, the door hook will push the push limit component inward, so that the push limit component will be separated from the support of the slide plate, and the limit on the movement of the slide plate will be released, so that the slide plate can be stuck in the door hook. In this process, the push limit component will apply a thrust to the door hook to prevent it from returning to its original position to assist in closing the door. Therefore, when the door is closed, the thrust will suddenly disappear, producing a suction feeling, causing a jump in the closing force, which can remind the user that the door is closed successfully;

[0026] 4. Through the setting of the switch device, the switch device can be linked with the door opening and closing status, and the operating status of the instrument can be controlled according to the door opening and closing status. When the door is opened, the signal of the switch device is interrupted and the instrument stops running, which can prevent the working instrument from hurting the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the utility model in a closed state;

[0029] Figure 3 This is a schematic diagram of the structure of the utility model in the open state;

[0030] Figure 4 It is a side view of the utility model in a closed state;

[0031] Figure 5 It is a side view of the utility model in the open state;

[0032] Figure 6 It is a schematic diagram of the specific structure of the utility model;

[0033] Figure 7 It is a specific structural schematic diagram of the thrust limiting assembly of the utility model.

[0034] In the figure:

[0035] 1. Cavity; 2. Cavity door; 3. Electromagnet; 4. Slide plate; 5. Door hook; 6. Limiting assembly; 7. Push limiting assembly; 8. Switch device;

[0036] 11. Opening; 12. Front cover;

[0037] 41. Card slot;

[0038] 51. Hook groove;

[0039] 61. Limiting groove; 62. Limiting member; 63. Anti-slip member;

[0040] 71. rotating shaft; 72. push limit block; 73. push limit spring; 74. flange plate; 75. push limit member; 76. mounting member;

[0041] 81. Proximity switch; 82. Proximity element. DETAILED DESCRIPTION

[0042] The following will be combined with the attached embodiment of the utility model Figure 1-7 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] The utility model provides Figure 1-Figure 7 A linkage electromagnetic door lock shown in the figure comprises a cavity 1 and a cavity door 2 arranged at an opening 11 of the cavity 1. In the utility model, one end of the cavity door 2 is hinged to the cavity 1, and the cavity door 2 can rotate relative to the cavity 1 around the hinge point.

[0044] Furthermore, in the present invention, the cavity 1 can be used to place a test sample.

[0045] in:

[0046] The cavity 1 is provided with an electromagnet 3, and the output end of the electromagnet 3 is provided with a slide plate 4 which moves with the stroke of the electromagnet 3. The slide plate 4 is pushed and pulled by controlling the attraction of the electromagnet 3 to achieve the effect of controlling the opening and closing of the door, which can avoid the door opening caused by misoperation and prevent the problem of accidental door opening. The use process is reliable and can improve the safety of the experiment.

[0047] In the present utility model, the electromagnet 3 is a push-pull type electromagnet 3 .

[0048] The electromagnet 3 utilizes the magnetic effect of electric current and can generate magnetic force when powered. When the current passes through, the electromagnet 3 will generate a strong suction force, which can drive the slide plate 4 to move downward, thereby achieving the effect of opening the door.

[0049] In addition, a return spring is provided at the output end of the electromagnet 3; when the electromagnet 3 is powered on, the electromagnet 3 generates suction, the output end of the electromagnet 3 retracts to compress the return spring, and drives the slide plate 4 to move downward; when the electromagnet 3 is powered off, the electromagnet 3 has no suction, the return spring is compressed and restored, and pushes the output end of the electromagnet 3 to extend, and drives the slide plate 4 to move upward.

[0050] The cavity body 1 is provided with a limit component 6 for limiting the stroke of the slide plate 4. The door hook 5 on the cavity door 2 cooperates with the slide plate 4 to achieve the door opening and closing effect. The up and down moving stroke of the slide plate 4 is limited by the limit component 6, so that the moving stroke of the slide plate 4 is fixed, and the slide plate 4 can slide up and down within the range, ensuring that the moving end position of the slide plate 4 is fixed, so that the linkage cooperation between the door hook 5 and the slide plate 4 is stable, and the smoothness of the door opening and closing process is guaranteed.

[0051] The limiting assembly 6 can prevent the slide plate 4 from being separated from the cavity 1 , and during the movement of the slide plate 4 , the limiting assembly 6 can guide the movement direction of the slide plate 4 , which is beneficial to further improve the stability of the movement process of the slide plate 4 .

[0052] The cavity door 2 is provided with a door hook 5 which abuts against the slide plate 4 and limits the slide plate 4 when the door is closed. When the door is closed, the door hook 5 can hook the slide plate 4 to lock the cavity door 2, so that the position of the cavity door 2 can be kept fixed, and artificial opening of the cavity door 2 during use can be avoided.

[0053] Due to long-term use, the cavity door 2 will fall due to gravity, which may cause usage errors and make the cavity door 2 unable to lock. In actual use, the cavity door 2 is usually used in a closed state. Therefore, in the utility model, the slide plate 4 will continue to support the door hook 5 in the closed state, so that the cavity door 2 can be prevented from falling under the action of gravity.

[0054] The cavity body 1 is provided with a push limit component 7 which abuts against the slide plate 4 and limits the slide plate 4 when the door is opened, and the push limit component 7 abuts against the door hook 5 and generates a thrust on the door hook 5 when the door is closed. Through the setting of the push limit component 7, when the door is opened, the electromagnet 3 is attracted to pull the slide plate 4 down to release the lock on the door hook 5. At this time, the push limit component 7 will generate a thrust to push the door hook 5, which can automatically pop open the cavity door 2. The user does not need to manually pull open the cavity door 2, which can improve the user experience.

[0055] Furthermore, through the setting of the push limit assembly 7, when the door is closed, the door hook 5 will push the push limit assembly 7 inward, so that the push limit assembly 7 will be separated from the support to the slide plate 4, and the limit on the movement of the slide plate 4 will be released, so that the slide plate 4 can be stuck in the door hook 5. During this process, the push limit assembly 7 will apply a thrust to the door hook 5 to prevent it from returning to its original position to assist in closing the door, so that the thrust will suddenly disappear when the door is closed, creating a suction feeling, causing a jump in the door closing force, and can remind the user that the door is closed successfully.

[0056] The cavity 1 is provided with a switch device 8. Through the setting of the switch device 8, the switch device 8 can be linked with the door opening and closing status, and the operating status of the instrument can be controlled according to the door opening and closing status. When the door is opened, the signal of the switch device 8 is interrupted and the instrument stops running, which can prevent the working instrument from hurting the user.

[0057] In the utility model, an outer shell is provided outside the cavity 1, and a liquid crystal display screen can be provided on the front side of the outer shell body for displaying the door opening and closing status and controlling the door opening and closing. When the door needs to be opened, the liquid crystal display screen is controlled to send a door opening instruction, the electromagnet 3 is attracted, and the slide plate 4 is pulled down to realize the door opening operation. By controlling the door opening through the liquid crystal display screen, it is possible to avoid accidental operation of the door opening and improve the safety of the experiment.

[0058] Specifically, the limit assembly 6 includes a limit groove 61 provided on the slide plate 4 and a limit piece 62 provided on the front cover 12 of the cavity 1, and the limit piece 62 is provided in the limit groove 61 and limits the stroke end point of the limit groove 61, by setting the limit piece 62 in the limit groove 61; in this way, when the slide plate 4 moves upward to the top stroke, the limit piece 62 will limit the bottom of the limit groove 61, thereby achieving the effect of fixing the top stroke position of the slide plate 4; and when the slide plate 4 moves downward to the bottom stroke, the limit piece 62 will limit the top of the limit groove 61, thereby achieving the effect of fixing the bottom stroke position of the slide plate 4.

[0059] Specifically, an anti-slip component 63 is provided on the limiting component 62, and the anti-slip component 63 exceeds the depth range of the limiting groove 61 and is arranged outside the slide plate 4, and the anti-slip component 63 can prevent the slide plate 4 from being separated from the cavity 1, and the slide plate 4 can be movably set on the cavity 1 through the anti-slip component 63.

[0060] Specifically, the anti-slip component 63 is designed as a circular structure, and the diameter of the anti-slip component 63 is larger than the width of the limiting groove 61, so that the area covered by the anti-slip component 63 is larger than the width of the limiting groove 61. In this way, the anti-slip component 63 can cover the outside of the limiting groove 61 to prevent the slide plate 4 from detaching from the cavity 1.

[0061] Specifically, the thrust limit assembly 7 includes a rotating shaft 71 fixed to the cavity 1, a thrust limit block 72 is provided on the rotating shaft 71, and the thrust limit block 72 can rotate relative to the cavity 1 through the rotating shaft 71; the thrust limit block 72 is provided with a mounting member 76, the mounting member 76 is provided with a thrust limit spring 73, and the other end of the thrust limit spring 73 is fixedly connected to the cavity 1 through a flange plate 74.

[0062] Specifically, the limit push block 72 is provided with a limit push piece 75 for limiting the slide plate 4. When the door is opened, the slide plate 4 moves downward to release the lock on the door hook 5. The limit push piece 75 bounces the door hook 5 open and abuts against the front cover 12 under the action of the limit push spring 73. In this way, the bottom of the limit push piece 75 will limit the top of the slide plate 4. Since the slide plate 4 can only move up and down, and when the door is closed, the door hook 5 moves from the outside to the inside, if the slide plate 4 covers the lock hole, it will cause the cavity door 2 to fail to close. By limiting the slide plate 4 with the limit push piece 75, the slide plate 4 can be prevented from moving up to cover the lock hole, thereby ensuring the smooth operation of the door closing operation.

[0063] The push-limiting member 75 can generate a thrust on the door hook 5 through the compression and release of the push-limiting spring 73. When the door is closed, the door hook 5 pushes the push-limiting member 75 inward and drives the mounting member 76 to compress the push-limiting spring 73. When the door is opened, the push-limiting spring 73 is released from compression and can drive the push-limiting member 75 to push the door hook 5 outward through the mounting member 76.

[0064] Specifically, the push-limiting member 75 abuts against the slide plate 4 and limits the slide plate 4 when opening the door, thereby preventing the slide plate 4 from moving up to cover the lock hole, thereby ensuring the smooth operation of the door closing operation; and the push-limiting member 75 abuts against the door hook 5 when closing the door and generates a thrust on the door hook 5, so that when opening the door, the push-limiting member 75 can push the door hook 5 outward to automatically pop open the cavity door 2, without the need for the user to manually pull open the cavity door 2, thereby improving the user experience.

[0065] Specifically, the push limit spring 73 will undergo elastic deformation under external force, and the door hook 5 will push the push limit member 75 when closing the door and drive the mounting member 76 to compress the push limit spring 73 through the push limit block 72. The push limit spring 73 will generate elastic potential energy when compressed by the door hook 5, so that the push limit spring 73 will push the door hook 5 outward after the compression is released.

[0066] Specifically, the switch device 8 includes a proximity switch 81 fixed to the cavity 1 and a proximity member 82 fixed to the slide plate 4, and the electromagnet 3 can control the slide plate 4 to slide and drive the proximity member 82 to contact or disengage from the proximity switch 81. The proximity member 82 is linked to the door opening and closing state, and the operating state of the instrument can be controlled according to the door opening and closing state; when the door is closed, the proximity member 82 contacts the proximity switch 81, the signal of the proximity switch 81 is stable, and the instrument operates normally; when the door is open, the proximity member 82 disengages from the proximity switch 81, the signal of the proximity switch 81 is interrupted, and the instrument stops running, which can prevent the working instrument from hurting the user.

[0067] Specifically, the door hook 5 is provided with a hook groove 51 which engages with the slide plate 4 when the door is closed. Through the setting of the hook groove 51, the slide plate 4 can be stuck in the hook groove 51 of the door hook 5 when the door is closed. The hook groove 51 can cooperate with the slide plate 4 so that the door hook 5 can firmly hold the slide plate 4, which can make the locking of the door hook 5 more stable, and can prevent the cavity door 2 from being opened manually during use, so that the position of the cavity door 2 remains fixed, and the cavity door 2 is stably locked.

[0068] In the utility model, when closing the door, since the push limit assembly 7 will generate a thrust on the door hook 5, the push limit assembly 7 will apply a force on the door hook 5 to make it move away from the cavity 1. In this way, the slide plate 4 is clamped in the hook groove 51 of the door hook 5, so that the slide plate 4 can be locked with the door hook 5, and the position of the door hook 5 is locked, and the thrust applied to the door hook 5 by the push limit assembly 7 can be overcome when closing the door.

[0069] Furthermore, when the slide plate 4 is separated from the door hook 5 , the lock on the door hook 5 can be released, and the thrust preventing the door hook 5 can be released, so that the push limit assembly 7 can push the door hook 5 to make the cavity door 2 bounce off the front cover 12 of the cavity 1 .

[0070] The slide plate 4 is provided with a slot 41 which engages with the hook slot 51 of the door hook 5 when the door is closed. The slot 41 and the door hook 5 are arranged corresponding to each other. By inserting the door hook 5 into the slot 41 and engaging the hook slot 51 with the slot 41, the locking of the door hook 5 can be made more stable, thereby preventing the door hook 5 from being subjected to impact force when closing and causing the cavity door 2 to become loose.

[0071] In the utility model, in order to ensure the stability of the closing of the cavity door 2, two door hooks 5 are provided on the upper and lower sides of the cavity door 2; the hook groove 51 of the door hook 5 located on the upper side of the cavity door 2 is engaged with the top of the slide plate 4; the hook groove 51 of the door hook 5 located on the lower side of the cavity door 2 is engaged with the card groove 41 of the slide plate 4.

[0072] In the utility model, a lock hole for inserting the door hook 5 is provided on the front cover 12 of the cavity 1, and the lock hole and the door hook 5 are arranged corresponding to each other; when closing the door, the door hook 5 can be inserted into the lock hole opened at the front end of the front cover 12 and engage with the slide plate 4 arranged at the rear end of the front cover 12; when opening the door, the slide plate 4 releases the lock on the door hook 5, and the push limit assembly 7 pushes the door hook 5, and the door hook 5 is ejected from the front cover 12 of the cavity 1 through the lock hole.

[0073] Working principle:

[0074] 1. Door closing operation:

[0075] When closing the door, the user pushes the cavity door 2 by hand, and the door hook 5 on the cavity door 2 will push the push limit member 75 from the outside to the inside through the lock hole and drive the installation member 76 to compress the push limit spring 73. The door hook 5 pushes the push limit member 75 inward to release the lock of the push limit member 75 on the slide plate 4, so that the slide plate 4 slides up under the drive of the electromagnet 3 and engages with the door hook 5 to realize the door closing operation.

[0076] After the door closing operation is completed, the proximity member 82 will contact the proximity switch 81, and the signal of the proximity switch 81 will be stable, so that the instrument can operate normally.

[0077] During the door closing process, the push limit member 75, under the action of the push limit spring 73, will apply a thrust to the door hook 5 to prevent it from returning to its original position to assist in closing the door. As a result, when the door closing operation is completed, the thrust will suddenly disappear, creating a suction feeling and causing a jump in the door closing force, which can remind the user that the door has been closed successfully.

[0078] 2. Door closed and locked:

[0079] After the door closing operation is completed, the door hook 5 is engaged with the slide plate 4, and the slide plate 4 can be stuck in the hook groove 51 of the door hook 5, so that the door hook 5 can firmly buckle the slide plate 4, which can make the locking of the door hook 5 more stable, realize the closing and locking of the chamber door 2, and avoid opening the door due to misoperation during use, prevent the problem of accidental door opening, and improve the safety of the experiment.

[0080] 3. Door opening operation:

[0081] When opening the door, the user controls the electromagnet 3 through the LCD screen to attract and drive the slide plate 4 to pull down, thereby releasing the lock on the door hook 5. At this time, the push limit spring 73 is released from compression, and can drive the push limit member 75 to push the door hook 5 outward through the mounting member 76, so that the cavity door 2 can be automatically popped open to realize the door opening operation.

[0082] After the door opening operation is completed, the proximity member 82 will be separated from the proximity switch 81, and the signal of the proximity switch 81 will be interrupted, so that the instrument stops running, which can prevent the working instrument from hurting the user.

[0083] 4. Door open and locked status:

[0084] After the door opening operation is completed, the slide plate 4 moves down to release the lock on the door hook 5, and the push-limiting member 75, pushed by the push-limiting spring 73, bounces the door hook 5 open and abuts against the front cover 12. In this way, the bottom of the push-limiting member 75 will limit the top of the slide plate 4, thereby realizing the door opening lock of the cavity door 2, and preventing the slide plate 4 from moving up to cover the lock hole, thereby ensuring the smooth operation of the subsequent door closing operation.

[0085] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A linkage electromagnetic door lock, comprising a cavity (1) and a cavity door (2) arranged at an opening (11) of the cavity (1), characterized in that: The cavity (1) is provided with an electromagnet (3), and the output end of the electromagnet (3) is provided with a slide plate (4) that moves along with the travel of the electromagnet (3); The cavity (1) is provided with a limit assembly (6) for limiting the travel of the slide plate (4), and the limit assembly (6) can prevent the slide plate (4) from escaping from the cavity (1); The cavity door (2) is provided with a door hook (5) which abuts against the slide plate (4) and limits the position of the slide plate (4) when the door is closed; The cavity (1) is provided with a push-limiting assembly (7) which abuts against the slide plate (4) and limits the position of the slide plate (4) when the door is opened, and the push-limiting assembly (7) abuts against the door hook (5) and generates a thrust force on the door hook (5) when the door is closed; The cavity (1) is provided with a switch device (8).

2. A linkage electromagnetic door lock according to claim 1, characterized in that: The limiting assembly (6) comprises a limiting groove (61) provided on the slide plate (4) and a limiting member (62) provided on the front cover (12) of the cavity (1), and the limiting member (62) is provided in the limiting groove (61) and limits the end point of the travel of the limiting groove (61).

3. A linkage electromagnetic door lock according to claim 2, characterized in that: The limiting member (62) is provided with an anti-slip member (63), the anti-slip member (63) exceeds the depth range of the limiting groove (61) and is arranged outside the slide plate (4), and the anti-slip member (63) can prevent the slide plate (4) from escaping from the cavity (1).

4. A linkage electromagnetic door lock according to claim 3, characterized in that: The anti-slipping piece (63) is designed to be a circular structure, and the diameter of the anti-slipping piece (63) is greater than the width of the limiting groove (61).

5. The linkage electromagnetic door lock according to claim 1, characterized in that: The thrust limiting assembly (7) comprises a rotating shaft (71) fixed to the cavity (1); a thrust limiting block (72) is provided on the rotating shaft (71); and the thrust limiting block (72) can rotate relative to the cavity (1) via the rotating shaft (71); The push limit block (72) is provided with a mounting piece (76), the mounting piece (76) is provided with a push limit spring (73), and the other end of the push limit spring (73) is fixedly connected to the cavity (1) via a flange plate (74).

6. A linkage electromagnetic door lock according to claim 5, characterized in that: The push limit block (72) is provided with a push limit member (75) for limiting the position of the slide plate (4), and the push limit member (75) can generate a thrust force on the door hook (5) through the compression and release of the push limit spring (73).

7. A linkage electromagnetic door lock according to claim 6, characterized in that: The push limiting member (75) abuts against the slide plate (4) and limits the position of the slide plate (4) when the door is opened, and the push limiting member (75) abuts against the door hook (5) and generates a thrust on the door hook (5) when the door is closed.

8. A linkage electromagnetic door lock according to claim 5 or 6, characterized in that: The push limit spring (73) will undergo elastic deformation under external force, and the door hook (5) will push the push limit member (75) when the door is closed and drive the mounting member (76) to compress the push limit spring (73) through the push limit block (72).

9. The linkage electromagnetic door lock according to claim 1, characterized in that: The switch device (8) comprises a proximity switch (81) fixed to the cavity (1) and a proximity member (82) fixed to the slide plate (4), and the electromagnet (3) can control the slide plate (4) to slide and drive the proximity member (82) to contact or separate from the proximity switch (81).

10. The linkage electromagnetic door lock according to claim 1, characterized in that: The door hook (5) is provided with a hook groove (51) which is engaged with the slide plate (4) when the door is closed, and the slide plate (4) is provided with a clamping groove (41) which is engaged with the hook groove (51) of the door hook (5) when the door is closed.

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