A mechanically maintained electromagnetic lock for a safety door

Abstract

The present invention discloses a mechanically maintained electromagnetic lock for a safety door, comprising: a main connecting plate; an electromagnet connected to the main connecting plate; two first travel switches symmetrically connected to the main connecting plate and arranged together with the electromagnet on the same surface of the main connecting plate to form a triangular arrangement; and a retaining member connected to the main connecting plate, distributed on both sides of the main connecting plate, capable of being connected to the electromagnet, and capable of contacting or separating from the first travel switch after a lock pin on a door body is moved; thereby overcoming the technical problem that the electromagnetic lock adopts electrical retention, the electrical retention requires the electromagnet to be energized for a long time, which easily causes the electromagnet to be burned out and has poor structural reliability, and achieving the technical effect of being able to reduce the continuous energization time of the electromagnet, prolong the service life of the electromagnet, form mechanical retention, and have relatively good structural reliability, which is conducive to wide promotion.

Description

Technical Field

[0001] The invention relates to the technical field of safety doors, in particular to a mechanically held electromagnetic lock for safety doors. Background Art

[0002] With the development of urban subways, the demand for subway safety doors is increasing. In the entire safety door system module, sliding doors are the most frequently used door bodies. In the sliding door opening system, electromagnetic locks are the most critical core components. The reliability of the electromagnetic lock's function is related to whether the door body can be opened normally. At present, most electromagnetic locks use electric retention, which has a complex structure, large size, and is inconvenient to install and maintain. Electric retention requires the electromagnet to be energized for a long time, which can easily cause the electromagnet to burn out and often cause some faults. Summary of the invention

[0003] In view of the above-mentioned deficiencies existing in the related art, the object of the present invention is to provide a mechanically held electromagnetic lock for a safety door, so as to solve the technical problems that the electromagnetic lock in the related art adopts electrical holding, which requires the electromagnet to be energized for a long time, which can easily cause the electromagnet to burn out, has poor structural reliability, and is inconvenient to install and maintain.

[0004] The technical solution to achieve the purpose of the present invention is: a mechanically held electromagnetic lock for a safety door, comprising an electromagnet; and further comprising:

[0005] A main connecting plate, connected to the electromagnet;

[0006] Two first travel switches are symmetrically connected to the main connecting plate and are arranged together with the electromagnet on the same surface of the main connecting plate to form a triangular arrangement;

[0007] and a retaining member connected to the main connecting plate, distributed on both sides of the main connecting plate, capable of being connected to the electromagnet, and capable of contacting or separating with the first travel switch after the lock pin on the door body is moved;

[0008] The retaining member comprises: a first connecting member connected to the main connecting plate member, and having two ends passing through the main connecting plate member;

[0009] A second connecting member, connected to the main connecting plate, with two ends passing through the main connecting plate and spaced apart from the first connecting member;

[0010] A first sliding member, connected to one end of the first connecting member or the second connecting member through a first long groove, spaced from the main connecting plate, and connected to the electromagnet at one end, and capable of contacting or separating from the first travel switch when moving along the first connecting member and the second connecting member;

[0011] a first pin connected to the first sliding member and disposed between the first sliding member and the main connecting plate;

[0012] A first stopper, connected to the second connecting member, capable of rotating at an angle with the second connecting member as a rotation center, engaging with or separating from the first pin, and disposed between the first sliding member and the main connecting plate;

[0013] A second sliding member, connected to the other end of the first connecting member or the second connecting member through a second long groove, is spaced apart from the main connecting plate, has a first notch on one side capable of clamping the locking pin, and is respectively arranged on both sides of the main connecting plate with the first sliding member;

[0014] A second stopper, connected to the second connecting member, capable of rotating at an angle with the second connecting member as a rotation center, having a second notch capable of cooperating with the first notch to clamp the locking pin, and arranged between the second sliding member and the main connecting plate;

[0015] A first toggle shaft is connected to the second sliding member and passes through a third long slot on the main connecting plate to be connected to the first sliding member, so as to link the second sliding member when the first sliding member moves.

[0016] And a second toggle shaft is connected to the second limiting member, passes through the fourth long slot on the main connecting plate, and is connected to the first limiting member. When the second limiting member is toggled by the locking pin, the first limiting member is linked.

[0017] Further: the first connecting member includes: two first stepped shafts, symmetrically connected to both sides of the main connecting plate;

[0018] a first gasket, which is sleeved on the first stepped shaft and is respectively fitted with the first sliding member or the second sliding member;

[0019] And a first locking nut, connected to the first stepped shaft, for limiting the position of the first sliding member or the second sliding member.

[0020] Further: the second connecting member includes: two second stepped shafts, symmetrically connected to both sides of the main connecting plate;

[0021] a second gasket, which is sleeved on the second stepped shaft and is respectively fitted with the first sliding member or the second sliding member;

[0022] A plurality of nylon sleeves, which are sleeved on the second stepped shaft and are arranged at intervals with the first limiting member or the second limiting member;

[0023] And a second locking nut is connected to the second stepped shaft and is used to limit the positions of the second gasket, the nylon sleeve, the first sliding member, the second sliding member, the first limiting member and the second limiting member.

[0024] Further: the first limiting member has a third notch and a fourth notch; the third notch and the fourth notch are continuously arranged at one end of the first limiting member, can respectively abut against the first pin, and are away from the second connecting member.

[0025] Further: further comprising: a first spacer and a second spacer; the first spacer and the second spacer have the same structure;

[0026] The first spacer is connected to the main connecting plate, is disposed between the main connecting plate and the second sliding member, and is penetrated by the first shifting shaft;

[0027] The second spacer is connected to the main connecting plate, is arranged between the main connecting plate and the second limiting member, and is penetrated by the second shifting shaft.

[0028] Further: also includes: a manual unlocking member connected to the main connecting plate;

[0029] The manual unlocking member includes: a second travel switch connected to the main connecting plate and on the same side as the first travel switch;

[0030] A sleeve body connected to the main connecting plate and arranged opposite to the second travel switch;

[0031] An unlocking rod is arranged at the sleeve body, and one end of the unlocking rod can be inserted into the sleeve body and fit with the sleeve body, and the other end protrudes outside the sleeve body;

[0032] A trigger head, one end of which passes through the main connecting plate and is connected to the unlocking rod;

[0033] A spring, which is sleeved on the unlocking rod and the trigger head and is arranged in the sleeve;

[0034] and a contact member connected to the first sliding member, away from the electromagnet, and capable of contacting the other end of the trigger head.

[0035] Further: the contact member includes: a "["-shaped block connected to the first sliding member; a central shaft connected to the "["-shaped block; and a bearing connected to the central shaft and capable of contacting the trigger head.

[0036] By adopting the above technical scheme, the present invention has the following beneficial effects: a mechanically held electromagnetic lock for a safety door, compared with the related art, an electromagnet, a first travel switch and a retaining member are connected on the main connecting plate; when the door body needs to be opened, the electromagnet is actuated to link the retaining member, the retaining member triggers the first travel switch, the door body moves, and the lock pin moves the retaining member, so that the retaining member is in a mechanically held state, and the door body can always be in an open state for a certain period of time, and there is no need for an electromagnet to be electrically held, thereby reducing the continuous power-on time of the electromagnet, extending the service life of the electromagnet, and having relatively better structural reliability; thereby overcoming the technical problem that the electromagnetic lock adopts electrical holding, the electrical holding requires the electromagnet to be powered on for a long time, which can easily cause the electromagnet to be burned out, and has poor structural reliability, and achieving the technical effect of being able to reduce the continuous power-on time of the electromagnet, extend the service life of the electromagnet, form mechanical holding, and have relatively good structural reliability, which is conducive to wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 An exploded view of an embodiment of the present invention;

[0038] Figure 2 This is one of the three-dimensional structural schematic diagrams of an embodiment of the present invention;

[0039] Figure 3 This is the second schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0040] Figure 4 is an exploded view of a first connecting member in an embodiment of the present invention;

[0041] Figure 5 An exploded view of the second connecting member, the first limiting member, the second limiting member and the second toggle shaft in an embodiment of the present invention;

[0042] Figure 6 is a front view of a main connecting plate in an embodiment of the present invention;

[0043] Figure 7 is a front view of a first sliding member in an embodiment of the present invention;

[0044] Figure 8 is a front view of a first position-limiting member in an embodiment of the present invention;

[0045] Fig. 9 is a front view of a second position-limiting member in an embodiment of the present invention;

[0046] Fig.10 is a front view of a second sliding member in an embodiment of the present invention;

[0047] Fig.11 This is a schematic diagram of the cooperation between the second limit member, the second sliding member and the locking pin in an embodiment of the present invention;

[0048] Fig.12 It is a schematic diagram of the three-dimensional structure of the first spacer, the second spacer and the main connecting plate in the embodiment of the present invention;

[0049] Fig.13 is a schematic diagram of the three-dimensional structure of the manual unlocking member in an embodiment of the present invention;

[0050] Fig.14 For the present invention Fig.13 A partial enlarged schematic diagram of part A in FIG.

[0051] Fig.15 is a cross-sectional view of a manual unlocking member in an embodiment of the present invention;

[0052] In the figure: 10. Main connecting plate, 11. Third long slot, 12. Fourth long slot, 20. Electromagnet, 30. First travel switch, 40. Holding member, 41. First connecting member, 411. First stepped shaft, 412. First gasket, 413. First locking nut, 42. Second connecting member, 421. Second stepped shaft, 422. Second gasket, 423. Nylon sleeve, 424. Second locking nut, 43. First sliding member, 431. First long slot, 44. First pin, 45. First stopper, 451. The third notch, 452. The fourth notch, 46. The second sliding member, 461. The second long groove, 462. The first notch, 47. The second limit member, 471. The second notch, 48. The first toggle shaft, 49. The second toggle shaft, 500. The locking pin, 60. The first spacer sleeve, 70. The manual unlocking member, 71. The second travel switch, 72. The sleeve body, 73. The unlocking rod, 74. The trigger head, 75. The spring, 76. The contact member, 761. The "["-shaped block, 762. The center shaft, 763. The bearing, 80. The second spacer sleeve. DETAILED DESCRIPTION

[0053] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings;

[0054] The invention discloses a mechanically held electromagnetic lock for a safety door, which solves the technical problems that the electromagnetic lock in the related art adopts electric holding, the electric holding requires the electromagnet to be energized for a long time, which easily causes the electromagnet to be burned out and has poor structural reliability, and achieves the positive effects of being able to reduce the continuous energization time of the electromagnet, prolong the service life of the electromagnet, form mechanical holding, and have relatively good structural reliability. The overall idea is as follows:

[0055] Example:

[0056] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 As shown; A mechanically held electromagnetic lock for a safety door, comprising:

[0057] Main connecting plate 10;

[0058] An electromagnet 20 connected to the main connecting plate 10;

[0059] Two first travel switches 30 are symmetrically connected to the main connecting plate 10 and are arranged together with the electromagnet 20 on the same surface of the main connecting plate 10 to form a triangular arrangement;

[0060] and a retaining member 40, connected to the main connecting plate 10, distributed on both sides of the main connecting plate 10, capable of being connected to the electromagnet 20, and capable of contacting or separating with the first travel switch 30 after the lock pin 500 on the door body is toggled;

[0061] The retaining member 40 includes: a first connecting member 41, connected to the main connecting plate 10, and having two ends passing through the main connecting plate 10;

[0062] A second connecting member 42 is connected to the main connecting plate 10, with two ends passing through the main connecting plate 10 and arranged at intervals with the first connecting member 41;

[0063] The first sliding member 43 is connected to one end of the first connecting member 41 or the second connecting member 42 through the first long groove 431, is spaced apart from the main connecting plate 10, and one end is connected to the electromagnet 20, and can contact or separate from the first travel switch 30 when moving along the first connecting member 41 and the second connecting member 42;

[0064] A first pin 44, connected to the first sliding member 43, and disposed between the first sliding member 43 and the main connecting plate 10;

[0065] A first stopper 45 is connected to the second connecting member 42, can rotate with the second connecting member 42 as a rotation center, engages with or separates from the first pin 44, and is disposed between the first sliding member 43 and the main connecting plate 10;

[0066] The second sliding member 46 is connected to the other end of the first connecting member 41 or the second connecting member 42 through the second long groove 461, and is spaced apart from the main connecting plate 10. One side of the second sliding member 46 has a first notch 462 capable of clamping the locking pin 500, and the first sliding member 43 is disposed on both sides of the main connecting plate 10;

[0067] The second stopper 47 is connected to the second connecting member 42, can rotate around the second connecting member 42, has a second notch 471 that can cooperate with the first notch 462 to clamp the locking pin 500, and is disposed between the second sliding member 46 and the main connecting plate 10;

[0068] A first toggle shaft 48 is connected to the second sliding member 46 and passes through the third long slot 11 on the main connecting plate 10 to be connected to the first sliding member 43. When the first sliding member 43 moves, the second sliding member 46 is linked;

[0069] And the second shifting shaft 49 is connected to the second limiting member 47, passes through the fourth long groove 12 on the main connecting plate 10, and is connected to the first limiting member 45. When the second limiting member 47 is shifted by the locking pin 500, the first limiting member 45 is linked.

[0070] Specifically, during implementation, the electromagnet 20, the first travel switch 30 and the retaining member 40 are connected to the main connecting plate 10; when the door body needs to be opened, the electromagnet 20 is actuated to link the retaining member 40, the retaining member 40 triggers the first travel switch 30, the door body moves, and the lock pin 500 toggles the retaining member 40, so that the retaining member 40 is in a mechanical holding state, and the door body can always be in an open state for a certain period of time, and the electromagnet 20 is not required to be electrically held, thereby reducing the continuous power-on time of the electromagnet 20, extending the service life of the electromagnet 20, and having relatively better structural reliability; thereby overcoming the technical problem that the electromagnetic lock adopts electrical holding, the electrical holding requires the electromagnet to be powered on for a long time, which easily causes the electromagnet to be burned out, and the structural reliability is poor, and achieving the technical effect of being able to reduce the continuous power-on time of the electromagnet, extend the service life of the electromagnet, form mechanical holding, and have relatively good structural reliability;

[0071] The following is a detailed description of each component and its connection relationship:

[0072] Specifically, if Figure 1 , Figure 2 , Figure 3 , Figure 6 As shown, the main connecting plate 10 can be formed by stamping a plate and can be connected with a countersunk screw inserted into the installation part, so that the installation and disassembly of the mechanically held electromagnetic lock of the safety door is very convenient;

[0073] The shape of the third long groove 11 is approximately waist-shaped; the shape of the fourth long groove 12 is approximately waist-shaped and has a certain curvature; the purpose of providing the third long groove 11 and the fourth long groove 12 is to not affect the normal movement position of the first toggle shaft 48 or the second toggle shaft 49;

[0074] Specifically, if Figure 1 , Figure 2 , Figure 3 As shown, the electromagnet 20 is a common structure in the prior art, connected to the main connecting plate 10 by screws, and plugged with one end of the first sliding member 43 through a "U"-shaped notch at one end, and then the two are tightened by a pin shaft, so that the electromagnet 20 can pull the first sliding member 43 to move the position; the first travel switch 30 adopts a common micro switch in the prior art, and is connected to the main connecting plate 10 by inserting a "["-shaped profile into the screw; after seeing the content disclosed in the present invention, ordinary technicians in this field can directly and unambiguously know how to set the electromagnet 20 and the first travel switch 30 without creative labor or excessive experiments;

[0075] Specifically, if Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the first connecting member 41 includes: two first stepped shafts 411, symmetrically connected to the two sides of the main connecting plate 10; a first gasket 412, sleeved on the first stepped shafts 411, respectively fitted with the first sliding member 43 or the second sliding member 46; and a first locking nut 413, connected to the first stepped shafts 411, used to limit the position of the first sliding member 43 or the second sliding member 46;

[0076] During implementation, the first stepped shaft 411 is machined from round steel, with the small shaft section at one end being plugged into the first through hole reserved on the main connecting plate 10, and then welded to the main connecting plate 10;

[0077] After the first locking nut 413 is connected to the threaded section on the other end of the first stepped shaft 411, the first washer 412 is adjusted to position the first sliding member 43 or the second sliding member 46 on the first stepped shaft 411 without affecting the sliding position of the first sliding member 43 or the second sliding member 46.

[0078] Specifically, if Figure 1 , Figure 2 , Figure 3 , Figure 5As shown, the second connecting member 42 includes: two second stepped shafts 421, symmetrically connected to the two sides of the main connecting plate 10; a second gasket 422, sleeved on the second stepped shaft 421, respectively fitted with the first sliding member 43 or the second sliding member 46; a plurality of nylon sleeves 423, sleeved on the second stepped shaft 421, and arranged at intervals with the first limiting member 45 or the second limiting member 47; and a second locking nut 424, connected to the second stepped shaft 421, for limiting the positions of the second gasket 422, the nylon sleeve 423, the first sliding member 43, the second sliding member 46, the first limiting member 45 and the second limiting member 47;

[0079] During implementation, the second stepped shaft 421 is machined from round steel, with the small shaft section at one end being plugged into the second through hole reserved on the main connecting plate 10, and then welded to the main connecting plate 10;

[0080] After the second locking nut 424 is connected to the threaded section on the other end of the second stepped shaft 421, the second gasket 422 and the nylon sleeve 423 are adjusted and arranged so that the first sliding member 43, the second sliding member 46, the first limiting member 45 and the second limiting member 47 are positioned on the second stepped shaft 421, and the first sliding member 43 and the second sliding member 46 can slide to a certain position, and the first limiting member 45 and the second limiting member 47 can rotate to a certain angle;

[0081] Specifically, if Figure 1 , Figure 2 , Figure 3 , Figure 7 As shown, the first sliding member 43 can be formed by stamping a plate; the shape of the first long groove 431 is approximately waist-shaped, which is conducive to the first sliding member 43 being able to move under the action of the electromagnet 20;

[0082] The contact portion between the first sliding member 43 and the first travel switch 30 is a first inclined surface, which can increase the contact area with the first travel switch 30 and ensure the contact effect;

[0083] Specifically, if Figure 1 , Figure 2 , Figure 3 , Figure 8 As shown, the first pin 44 has a "T" shape, and the top is welded to the main connecting plate 10;

[0084] The first stopper 45 can be formed by stamping a plate; the first stopper 45 has a third notch 451 and a fourth notch 452; the third notch 451 and the fourth notch 452 are continuously arranged at one end of the first stopper 45, and can respectively abut against the first pin 44 and be away from the second connecting member 42;

[0085] When the first pin 44 abuts against the third notch 451, the first sliding member 43 is not in contact with the first travel switch 30, and the door body is in a closed state;

[0086] When the first pin 44 abuts against the fourth notch 452, the first sliding member 43 contacts the first travel switch 30, the electromagnet 20 is in a power-off state, and the door body is in an open state;

[0087] Specifically, if Figure 1 , Figure 2 , Figure 3 , Fig. 9 , Fig.10 , Fig.11 As shown, the second sliding member 46 can be formed by stamping a plate; the second limiting member 47 can be formed by stamping a plate;

[0088] The shape of the second long groove 461 is approximately waist-shaped, which is conducive to the second sliding member 46 being able to move under the linkage of the first sliding member 43;

[0089] The first notch 462 and the second notch 471 can limit the lock pin 500 when the door is closed, and the second notch 471 can also ensure that the lock pin 500 moves the second limiting member 47;

[0090] Specifically, if Figure 1 , Figure 2 , Figure 3 As shown, the first toggle shaft 48 has a T-shaped shape, is tightly matched with the third through hole reserved on the second sliding member 46, and passes through the third long groove 11 on the main connecting plate 10, and is tightly matched with the fourth through hole reserved on the first sliding member 43. When the first sliding member 43 moves, the second sliding member 46 is linked to slide. A ninth through hole is also provided on the end of the first toggle shaft 48 passing through the first sliding member 43, and a cotter pin is inserted into the ninth through hole to prevent the first toggle shaft 48 from falling off.

[0091] The second toggle shaft 49 is T-shaped, tightly matched with the fifth through hole reserved on the second limit member 47, and passes through the fourth long groove 12 on the main connecting plate 10, and tightly matched with the sixth through hole reserved on the first limit member 45. When the second limit member 47 is toggled by the locking pin 500, the first limit member 45 is linked to rotate, so that the third notch 451 and the fourth notch 452 on the first limit member 45 are respectively abutted against the first pin 44; the end of the second toggle shaft 49 passing through the first limit member 45 is further provided with a tenth through hole, and a split pin is inserted into the tenth through hole to prevent the second toggle shaft 49 from falling off;

[0092] Specifically, if Figure 1 , Figure 2 , Figure 3 , Fig.12 As shown, it also includes: a first spacer 60 and a second spacer 80; the first spacer 60 and the second spacer 80 have the same structure;

[0093] The first spacer 60 is connected to the main connecting plate 10, disposed between the main connecting plate 10 and the second sliding member 46, and is penetrated by the first shifting shaft 48;

[0094] The second spacer 80 is connected to the main connecting plate 10, disposed between the main connecting plate 10 and the second limiting member 47, and is penetrated by the second shifting shaft 49;

[0095] During implementation, the first spacer 60 and the second spacer 80 are both circular in cross section, and one end is welded to the main connecting plate 10. The first spacer 60 can block the first toggle shaft 48, and the second spacer 80 can block the second toggle shaft 49, respectively protecting the first toggle shaft 48 and the second toggle shaft 49, with good sealing and beautiful appearance, and without affecting the normal operation of other components;

[0096] Specifically, if Figure 1 , Figure 2 , Figure 3 , Fig.13 , Fig.14 , Fig.15 As shown, it also includes: a manual unlocking member 70, which is connected to the main connecting plate 10 and can manually open the door body when the door body is closed and the electromagnet 20 fails, thereby improving safety;

[0097] The manual unlocking member 70 includes: a second travel switch 71 connected to the main connecting plate 10 and on the same side as the first travel switch 30;

[0098] An unlocking rod 73 is disposed at the sleeve 72, and one end of the unlocking rod 73 can be inserted into the sleeve 72 and is loosely matched with the sleeve 72, and the other end protrudes from the outside of the sleeve 72;

[0099] A trigger head 74, one end of which passes through the main connecting plate 10 and is connected to the unlocking rod 73;

[0100] A spring 75, which is sleeved on the unlocking rod 73 and the trigger head 74 and is disposed in the sleeve body 72;

[0101] and a contact member 76 connected to the first sliding member 43 , away from the electromagnet 20 , capable of contacting the other end of the trigger head 74 ;

[0102] During implementation, the second travel switch 71 adopts a common micro switch in the prior art, and is connected to the main connecting plate 10 by inserting a screw through an "L"-shaped profile; after reading the contents disclosed in the present invention, a person skilled in the art can directly and unambiguously know how to set the second travel switch 71 without creative labor or excessive experiments;

[0103] The sleeve 72 has a circular ring structure in cross section, and one end is welded to the main connecting plate 10;

[0104] The unlocking rod 73 is a "T"-shaped structure, one end of which is partially inserted into the sleeve 72, and the other end is arranged outside the sleeve 72, so that the manual unlocking device on the sliding door body presses the unlocking rod 73 to trigger unlocking;

[0105] The trigger head 74 includes a trigger block and a trigger shaft connected to the trigger block; one end of the trigger shaft passes through the seventh through hole reserved on the main connecting plate 10, and is threadedly connected to the threaded blind hole reserved on the unlocking rod 73 in the sleeve 72, or is tightly matched with the blind hole reserved on the unlocking rod 73, so that the unlocking rod 73 and the trigger head 74 are connected to the main connecting plate 10; the trigger block is a square block, and a second inclined surface is also provided on one side wall, which can gradually contact with the contact member 76 to push the first sliding member 43 to move the position;

[0106] The spring 75 is a cylindrical spring, which is limited between the unlocking rod 73 and the trigger head 74 and is arranged in the sleeve 72. After the manual unlocking device on the sliding door body triggers the unlocking rod 73, the cylindrical spring will continue to be compressed. After the trigger head 74 triggers the contact member 76 and the second travel switch 71, the elastic force of the spring 75 is conducive to the return of the unlocking rod 73 and the trigger head 74.

[0107] The contact member 76 includes: a "["-shaped block 761, connected to the first sliding member 43; a central shaft 762, connected to the "["-shaped block 761; and a bearing 763, connected to the central shaft 762, capable of contacting the trigger head 74; the "["-shaped block 761 is cut from a plate and welded to the first sliding member 43; the central shaft 762 passes through the eighth through hole reserved on the "["-shaped block 761, and is tightly fitted with the "["-shaped block 761; the bearing 763 is a deep groove ball bearing, which is tightly fitted in the middle part of the central shaft 762, and two retaining springs are connected to the central shaft 762 to limit the position of the bearing 763;

[0108] After the manual unlocking device on the sliding door body triggers the unlocking rod 73, the second inclined surface on the trigger head 74 contacts the bearing 763, and while being able to push the first sliding member 43, the rotation of the bearing 763 and the setting of the second inclined surface can reduce the friction force, thereby improving the service life of the overall structure;

[0109] The working principle of the present invention is as follows:

[0110] When the door needs to be opened, the central control panel PSC outputs a door opening command. After the DCU receives the door opening command, the electromagnet 20 is energized, driving the first sliding member 43 to move the position, and the first sliding member 43 contacts the first travel switch 30, triggering the first travel switch 30. At the same time, the first sliding member 43 is linked to the second sliding member 46, so that the first notch 462 on the second sliding member 46 is separated from the lock pin 500. The first travel switch 30 transmits a signal to the door controller DCU, and the driver in the door controller DCU sends an instruction to drive the motor to move, so that the door starts to move, and the lock pin 500 drives the second limit member 47 to rotate, and links the first limit member 45, so that the fourth notch 452 abuts against the first pin 44, which can prevent the first sliding member 43 from sliding down due to gravity after the electromagnet 20 is powered off, forming a mechanical hold, and the electromagnet 20 is in a power-off state when the door is in an open state for a period of time;

[0111] When the door needs to be closed, the central control panel PSC outputs a door closing command. After the driver in the door controller DCU receives the door closing command, the drive motor is activated, so that the door starts to move, and the lock pin 500 drives the second limiter 47 to rotate in the opposite direction, linking the first limiter 45, so that the notch 452 is separated from the first pin 44. At this time, since the electromagnet 20 is in a power-off state, under the action of gravity, the first sliding member 43 and the second sliding member 46 fall down, and the lock pin 500 on the door is locked, preparing for the next opening of the door.

[0112] When the door body is in a closed state and the electromagnet 20 fails, it needs to be opened manually by operating the manual unlocking device on the sliding door body. The manual unlocking device will press the unlocking rod 73, and the trigger head 74 will push the first sliding member 43. At the same time, the first sliding member 43 will link the second sliding member 46, so that the first notch 462 on the second sliding member 46 is separated from the lock pin 500, and the second travel switch 71 and the first travel switch 30 are triggered. The first travel switch 30 feeds back a signal to the door controller DCU, and the safety circuit is disconnected. The second travel switch 71 transmits a signal to the driver in the door controller DCU. Manually pushing the door causes the door body to start moving, and the lock pin 500 drives the second limit member 47 to rotate, linking the first limit member 45 so that the fourth notch 452 abuts against the first pin 44, and the door body is opened. The second travel switch 71 transmits a signal to the driver in the door controller DCU. After 30 seconds, the driver will issue a command to drive the motor to close the door.

[0113] In the description of the present invention, it is necessary to understand that the terms "up", "down", "left", "right", "front", "back" and the like indicating directions or positional relationships are based on the positional relationships described in the accompanying drawings and are only for the convenience of describing the present invention or simplifying the description, rather than indicating a specific direction that must be possessed; the operating process described in the embodiments is not an absolute usage procedure and corresponding adjustments may be made during actual use.

[0114] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons having ordinary skills in the field to which the invention belongs; the words "first", "second" and similar terms used in the specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not necessarily indicate a quantity limitation, but rather indicate the existence of at least one, which needs to be determined based on the content of the embodiment.

[0115] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mechanically held electromagnetic lock for a safety door, comprising an electromagnet (20); characterized in that: Also includes: A main connecting plate (10) connected to the electromagnet (20); Two first travel switches (30) are symmetrically connected to the main connecting plate (10) and are arranged together with the electromagnet (20) on the same surface of the main connecting plate (10) to form a triangular arrangement; and a retaining member (40) connected to the main connecting plate (10), distributed on both sides of the main connecting plate (10), capable of being connected to the electromagnet (20), and capable of contacting or separating from the first travel switch (30) after a lock pin (500) on the door body is moved; The retaining member (40) comprises: a first connecting member (41) connected to the main connecting plate member (10), and having two ends passing through the main connecting plate member (10); A second connecting member (42) is connected to the main connecting plate (10), with two ends passing through the main connecting plate (10) and arranged at intervals with the first connecting member (41); A first sliding member (43) is connected to one end of the first connecting member (41) or the second connecting member (42) through a first long slot (431), is spaced apart from the main connecting plate (10), and one end is connected to the electromagnet (20), and can contact or separate from the first travel switch (30) when moving along the first connecting member (41) and the second connecting member (42); A first pin (44) connected to the first sliding member (43) and arranged between the first sliding member (43) and the main connecting plate member (10); A first stopper (45) is connected to the second connecting member (42), can rotate at an angle with the second connecting member (42) as a rotation center, engages with or separates from the first pin (44), and is arranged between the first sliding member (43) and the main connecting plate (10); A second sliding member (46) is connected to the other end of the first connecting member (41) or the second connecting member (42) through a second long groove (461), is arranged at a distance from the main connecting plate (10), has a first notch (462) on one side capable of clamping the locking pin (500), and is arranged on both sides of the main connecting plate (10) together with the first sliding member (43); A second limiting member (47) is connected to the second connecting member (42), can rotate at an angle with the second connecting member (42) as a rotation center, has a second notch (471) that can cooperate with the first notch (462) to clamp the locking pin (500), and is arranged between the second sliding member (46) and the main connecting plate (10); A first shifting shaft (48) is connected to the second sliding member (46), passes through the third long slot (11) on the main connecting plate (10), and is connected to the first sliding member (43), so as to link the second sliding member (46) when the first sliding member (43) moves. and a second shifting shaft (49), which is connected to the second limiting member (47), passes through the fourth long slot (12) on the main connecting plate (10), and is connected to the first limiting member (45), so that when the second limiting member (47) is shifted by the locking pin (500), the first limiting member (45) is linked.

2. A mechanically held electromagnetic lock for a safety door according to claim 1, characterized in that: The first connecting member (41) comprises: two first stepped shafts (411) symmetrically connected to two sides of the main connecting plate (10); A first gasket (412) is sleeved on the first stepped shaft (411) and is respectively fitted with the first sliding member (43) or the second sliding member (46); and a first locking nut (413), connected to the first stepped shaft (411), for limiting the position of the first sliding member (43) or the second sliding member (46).

3. A mechanically held electromagnetic lock for a safety door according to claim 1, characterized in that: The second connecting member (42) comprises: two second stepped shafts (421) symmetrically connected to two sides of the main connecting plate (10); A second gasket (422) is sleeved on the second stepped shaft (421) and is respectively fitted with the first sliding member (43) or the second sliding member (46); A plurality of nylon sleeves (423), which are sleeved on the second stepped shaft (421) and are arranged at intervals with the first limiting member (45) or the second limiting member (47); And a second locking nut (424) is connected to the second stepped shaft (421) and is used to limit the positions of the second gasket (422), the nylon sleeve (423), the first sliding member (43), the second sliding member (46), the first limiting member (45) and the second limiting member (47).

4. A mechanically held electromagnetic lock for a safety door according to claim 1, characterized in that: The first limiting member (45) has a third notch (451) and a fourth notch (452); the third notch (451) and the fourth notch (452) are arranged continuously at one end of the first limiting member (45), and can respectively abut against the first pin (44) and are away from the second connecting member (42).

5. The mechanically held electromagnetic lock for a safety door according to claim 1, characterized in that: Also includes: A first spacer (60) and a second spacer (80); the first spacer (60) and the second spacer (80) have the same structure; The first spacer (60) is connected to the main connecting plate (10), is arranged between the main connecting plate (10) and the second sliding member (46), and is penetrated by the first shifting shaft (48); The second spacer (80) is connected to the main connecting plate (10), is arranged between the main connecting plate (10) and the second limiting member (47), and is penetrated by the second shifting shaft (49).

6. A mechanically held electromagnetic lock for a safety door according to claim 1, characterized in that: Also includes: A manual unlocking member (70) connected to the main connecting plate (10); The manual unlocking member (70) comprises: a second travel switch (71) connected to the main connecting plate (10) and located on the same side as the first travel switch (30); A sleeve (72) connected to the main connecting plate (10) and arranged opposite to the second travel switch (71); An unlocking rod (73) is arranged at the sleeve (72), one end of which can be inserted into the sleeve (72) and is clearance-matched with the sleeve (72), and the other end of which protrudes outside the sleeve (72); A trigger head (74), one end of which passes through the main connecting plate (10) and is connected to the unlocking rod (73); A spring (75) is sleeved on the unlocking rod (73) and the trigger head (74) and is arranged in the sleeve body (72); and a contact member (76) connected to the first sliding member (43), away from the electromagnet (20), and capable of contacting the other end of the trigger head (74).

7. A mechanically held electromagnetic lock for a safety door according to claim 6, characterized in that: The contact member (76) comprises: a "["-shaped block (761) connected to the first sliding member (43); a central shaft (762) connected to the "["-shaped block (761); and a bearing (763) connected to the central shaft (762) and capable of contacting the trigger head (74).

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