Novel emergency door manual unlocking device

Abstract

The utility model discloses a novel emergency door manual unlocking device which comprises an upper lock, a top rod, a middle lock, a push rod, a tail lock, a ground rod and a lower lock. According to the upper lock, an upper lock catch piece is installed on a lintel, an upper lock spring bolt is rotatably installed in an upper lock shell, a sliding block is arranged in the upper lock shell in a sliding mode, and a top rod is connected with the upper lock and the middle lock. The middle lock comprises a middle lock shell, a middle shaft provided with a middle lock shifting wheel is vertically arranged on the middle lock shell, a left sliding sheet and a right sliding sheet are arranged in the middle lock shell, the upper ends and the lower ends of the left sliding sheet and the right sliding sheet are connected with the top rod and the ground rod respectively, a pin roller is arranged on the outer sides of the left sliding sheet and the right sliding sheet, and the middle lock shifting wheel is matched with the pin roller to push the left sliding sheet and the right sliding sheet to move upwards; two ends of a push rod for driving the middle shaft to rotate are respectively connected with the middle lock and the tail lock; the ground rod is connected with a lower lock latch of the lower lock, and a lock catch piece is fixed to a doorsill of the emergency door. Unlocking of the upper lock and the lower lock can be achieved by pressing the push rod downwards, and the lock has the advantages of being reasonable in structure and high in reliability.

Description

Technical Field

[0001] The utility model relates to a manual unlocking device, in particular to a novel emergency door manual unlocking device, belonging to the technical field of rail transportation. Background Art

[0002] Subway rail transit is one of the main means of transportation in the city. In order to ensure the safety of passengers, a safety door system is installed next to the platform near the subway track to separate the waiting platform from the track. This safety door system uses a sliding door. When the vehicle arrives at the station and stops, the sliding door is automatically controlled by electricity to open so that passengers can get on and off the vehicle. When the vehicle leaves the station, the sliding door will automatically close and lock to prevent waiting passengers from mistakenly entering the track and causing unnecessary injuries. When the subway vehicle door cannot be aligned with the platform door sliding door, because the emergency door is located between the sliding doors, passengers or station staff can manually open the emergency door, and people can be evacuated to ensure the safety of passengers.

[0003] CN202201650U discloses an emergency door safety lock, which includes an upper lock tongue assembly, an upper connecting plate, an upper transmission rod, a push rod lock unlocking baffle, a push rod lock unlocking assembly, a key unlocking assembly, a lower transmission rod and a compression limit fiber spring, wherein a push-pull lock upper lock tongue and an upper push rod are arranged in the upper lock tongue assembly, and the push rod lock unlocking assembly includes: a tongue plate, a rotating plate and a push rod, and the push rod can be pressed down to drive the rotating plate to rotate, thereby driving the tongue plate to rotate, and the tongue plate and the push rod lock unlocking baffle are in linear contact, pushing the upper and lower transmission rods to move upward, pushing the upper lock tongue to rotate, and realizing manual unlocking. However, since the tongue plate and the push rod lock unlocking baffle are in linear contact, there is a problem of poor working reliability.

[0004] Therefore, a manual unlocking device with reasonable structure and high reliability has become the goal pursued by those skilled in the art. Summary of the invention

[0005] The utility model aims to solve the problem that the existing emergency door safety lock has an unreasonable structure, thus resulting in poor reliability.

[0006] In order to achieve the above-mentioned invention object, the technical solution of the utility model is: a new type of emergency door manual unlocking device, which includes: an upper lock, a sky rod, a middle lock, a push rod, a tail lock, a ground rod and a lower lock; characterized in that:

[0007] The lock comprises: a locking catch piece fixedly mounted on the lintel of the emergency door and extending vertically downward, a locking bolt rotatably mounted on the upper inner part of a locking lock shell, a slider slidably mounted in the locking lock shell along the locking lock shell, and the upper end of the sky rod is connected to the lower end of the slider; when the slider is in a low position, the upper end of the slider and the lower end of the locking bolt form a support, so that the upper end of the locking bolt and the locking catch piece remain in a locked state; when the slider is in a high position, the lower end of the locking bolt is separated from the support and rotates, and the locking catch piece is unlocked;

[0008] The sky rod is in the shape of a vertical rod, and its lower end is connected to the middle lock;

[0009] The middle lock comprises: a middle lock shell of a rectangular parallelepiped arranged longitudinally, a middle axis arranged on the middle lock shell in a direction perpendicular to the plane where the emergency door is located, and a middle lock dial wheel installed on the middle axis; a left sliding piece and a right sliding piece arranged oppositely are arranged in the middle lock shell, and a space for accommodating the middle lock dial wheel is formed in the middle parts of the left sliding piece and the right sliding piece, and the upper and lower ends of the left sliding piece and the right sliding piece are fitted and fixed together, and extend from the guide holes at the upper and lower ends of the middle lock shell and are respectively connected to the lower end of the sky rod and the upper end of the ground rod, a roller parallel to the middle axis is rotatably arranged on the outer sides of the left sliding piece and the right sliding piece, away from one side of the push rod, and the middle lock dial wheel has a pull tooth matched with the roller, and when the middle lock dial wheel rotates clockwise, the pull tooth pushes the left sliding piece and the right sliding piece to move upward through the roller to unlock the lock;

[0010] The tail lock comprises: a tail shaft perpendicular to the plane where the emergency door is located and rotatably arranged on the tail lock housing;

[0011] The two ends of the push rod are respectively connected to the middle shaft of the middle lock and the tail shaft of the tail lock, so as to drive the middle shaft to rotate;

[0012] The lower end of the ground rod is connected to the lower lock;

[0013] The lower lock comprises: a lower lock housing in a longitudinal rectangular shape, an upper end of a lower lock latch connected to the lower end of the ground rod, and a lock plate with a lock hole in the middle for inserting the lower lock latch fixed on the threshold of the emergency door.

[0014] The utility model discloses a novel emergency door manual unlocking device, as a preferred solution, wherein: the locking bolt has a lock groove 1 which can be inserted into the locking lock plate, is in a locked state, and has a U-shaped cross section; a hinge pin hole for hinged connection with the locking lock shell is provided below one side wall of the lock groove 1, and a lock bolt hinge shaft passes through the hinge pin hole to rotatably install the locking bolt on the upper inner part of the locking lock shell; the other side wall of the lock groove 1 has an arc-shaped arm extending downward, and a lock groove 2 with a U-shaped cross section is formed between the arc-shaped arm and the outer wall of the hinge pin hole; the upper end of the slider has a support arm extending in an arc shape from the horizontal to the upper right, The outer side surface of the support arm has a stop surface for stopping the end of the arc-shaped arm of the locking lock tongue, and a space for the arc-shaped arm to be inserted when the lock groove 1 of the locking lock tongue is disengaged from the locking lock catch piece is formed on the outer side of the support arm. When the slider is in a low position, the stop surface of the support arm supports the arc-shaped arm and enables the locking lock catch piece to be inserted into the lock groove 1 and be in a locked state. When the slider slides to a high position, the end of the support arm is disengaged from the arc-shaped arm, the locking lock tongue rotates under the action of gravity, the arc-shaped arm is inserted into the space, and the locking lock catch piece is disengaged from the lock groove 1 to achieve unlocking.

[0015] The utility model describes a novel emergency door manual unlocking device, as a preferred solution, wherein: the slider includes a slider body surrounded by a back plate and two side plates and having a shape adapted to the inner wall of the locked lock shell, the support arm is formed on the upper part of the back plate of the slider, and the space is formed between the support arm and the two side plates of the slider body.

[0016] The utility model describes a novel emergency door manual unlocking device, as a preferred embodiment, wherein: the central axis is arranged on the central lock shell through a bracket fixed on the central lock shell; the bracket has a door-shaped cross-section, and its two oppositely arranged side panels are provided with mounting holes for installing the central axis, the free end of the side panel is provided with a flange connected to the left end plate of the central lock shell, and the central lock shell side panels corresponding to the central axis are provided with U-shaped grooves for the central axis to be embedded.

[0017] The utility model discloses a novel manual unlocking device for emergency door, as a preferred solution, wherein: the extended end of the central axis of the central lock is connected to one end of a rocker arm 1, and the end of the push rod is connected to the other end of the rocker arm 1; the end of the tail axis extending out of the tail lock housing is connected to one end of the rocker arm 2, and one end of the rocker arm 2 is connected to the tail end of the push rod; when the push rod is pushed downward, the rocker arm 1 drives the central axis and the central lock dial wheel to rotate clockwise, triggering the unlocking.

[0018] The utility model discloses a novel manual unlocking device for emergency door, as a preferred solution, wherein: one end of a middle lock reset spring is connected to the rear lower end of the middle lock dial wheel opposite to the dial tooth, and the other end of the middle lock reset spring is connected to the lower end of the end plate of the bracket, which is used to reset the middle lock dial wheel after unlocking; the tail lock also includes: a tail lock dial wheel arranged in the middle of the tail shaft, and a tail lock reset spring is connected between the tail lock dial wheel and the tail lock shell.

[0019] The utility model discloses a novel emergency door manual unlocking device, as a preferred solution, wherein: a guide plate having a guide hole in the middle for the lower lock bolt to pass through is provided in the lower lock shell.

[0020] The utility model discloses a novel manual unlocking device for emergency doors, as a preferred solution, wherein: the left sliding plate and the right sliding plate respectively protrude outward above the space one to form a space two, and a lock cylinder dial wheel for unlocking with a key and a paddle contacting the lock cylinder dial wheel are provided in the space two, and the two ends of the paddle are riveted to the left sliding plate and the right sliding plate.

[0021] The utility model describes a novel manual unlocking device for emergency doors, as a preferred solution, wherein: a riveted column is provided on one of the two side panels at the lower end of the locked slider, and the riveted column is connected to an upper screw rod, and the upper screw rod is threadedly connected to the top end of the sky rod; the upper part of the lower locking latch is a screw rod, and the lower locking latch is threadedly connected to the lower end of the ground rod.

[0022] The utility model adopts the above technical solution, connects the upper lock and the middle lock through the sky rod, connects the middle lock and the lower lock through the ground rod, and the push rod is arranged between the middle lock and the tail lock; the push rod is pressed down to drive the middle axis and the middle lock dial wheel installed on the middle axis to rotate, and the middle lock dial wheel further pushes the left slide and the right slide arranged in the middle lock shell to move upward, thereby driving the upper locked slider to move upward, and when the upper locked slider moves upward, the lock tongue is separated from the support of the slider, and the upper locked lock tongue rotates under the action of gravity, so that the lock catch piece is separated from the upper locked lock tongue, and the upper locked unlocking is realized. At the same time, the left slide and the right slide move upward, driving the lower locked lock bolt of the lower lock to be lifted upward, separated from the lock catch piece, and the lower locked unlocking is realized. The utility model has a reasonable and simple structural design. Through testing, it can ensure that the hand unlocking is stable and reliable in the application of platform doors, and it can ensure that the emergency door manual unlocking device does not loosen in the subway environment and vibration process, and the function is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of a novel emergency door manual unlocking device described in the utility model;

[0024] Figure 2It is a schematic diagram of a new type of manual unlocking device for emergency door according to the utility model installed on the emergency door;

[0025] Figure 3 , 4 It is a three-dimensional view and an exploded view of a locking device for a new type of emergency door manual unlocking device described in the utility model;

[0026] Figure 5 It is a three-dimensional diagram of a locking catch piece of a novel emergency door manual unlocking device described in the utility model;

[0027] Figure 6 It is a three-dimensional diagram of a locking bolt of a novel emergency door manual unlocking device described in the utility model;

[0028] Figure 7 It is a three-dimensional diagram of a slider of a novel emergency door manual unlocking device described in the utility model;

[0029] Figure 8 , 9 It is a three-dimensional diagram and an exploded diagram of a central lock of a novel emergency door manual unlocking device described in the utility model;

[0030] Fig.10 , 11 It is an end view and a stereogram of the assembly of the left slide and the right slide of a novel emergency door manual unlocking device described in the utility model;

[0031] Fig.12 It is a three-dimensional diagram of the central axis of a novel emergency door manual unlocking device described in the utility model;

[0032] Fig.13 It is a three-dimensional diagram of a central lock dial wheel of a novel emergency door manual unlocking device described in the utility model;

[0033] Fig.14 It is a three-dimensional diagram of a bracket of a novel emergency door manual unlocking device described in the utility model;

[0034] Fig.15 , 16 It is a stereoscopic view and an exploded view of a tail lock of a novel emergency door manual unlocking device described in the utility model;

[0035] Fig.17 , 18 It is a stereoscopic view and an exploded view of the lower lock of a novel emergency door manual unlocking device described in the utility model;

[0036] Fig.19 , 20 The utility model is a schematic diagram of the manual unlocking and locking process of a novel emergency door manual unlocking device.

[0037] Description of the reference numerals: upper lock 1, upper lock catch 10, upper lock tongue 11, lock groove 1 111, arc arm 112, hinge pin hole 113, lock groove 2 114; upper lock housing 12, slider 13, slider body 130, side plate 1 1301, back plate 1302, support arm 131, space 132, stop surface 133; lock tongue hinge 14, upper lock cover 15, upper screw rod 16, riveted column 17, screw 1 18; sky rod 2; middle lock 3, middle lock housing 31, left end plate 3101, guide hole 3102, middle lock housing side plate 3103, U-shaped groove 3 104, screw 2 3105; center shaft 32, rotary cut surface 321, annular groove 322, center lock dial wheel 33, dial tooth 331, spring mounting hole 1 332, center lock reset spring 34; roller 35, bracket 36, side plate 2 361, flange 362, end plate 363, spring mounting hole 2 364, mounting hole 365; space 1 37, left slide 38, rivet 381, right slide 39, center lock cover 310, shaft end retaining ring 311, lock core dial wheel 312, dial 313, space 2 314; push rod 4, rocker arm 1 41, rocker arm 2 42; Tail lock 5, tail lock dial wheel 51, tail lock housing 52, tail shaft 53, tail lock cover 54, tail lock reset spring 55; ground rod 6; lower lock 7: lower lock housing 71, lower lock cover plate 72, 131131 lower lock latch 73, guide plate 74, lock catch plate 75; emergency door 100. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the preferred embodiments cannot be used to limit the protection scope of the present invention.

[0039] Example 1, see Figure 1-18 , the figure shows a new type of emergency door manual unlocking device described in the utility model, the new type of emergency door manual unlocking device is arranged in the door frame of the subway platform emergency door 100, and comprises: an upper lock 1, a top rod 2, a middle lock 3, a push rod 4, a tail lock 5, a ground rod 6 and a lower lock 7; the upper lock 1 comprises: an upper lock lock plate 10, see Figure 3 , 4 , 5, 6, the locking catch piece 10 is fixedly mounted on the lintel of the emergency door by a screw 18, and is vertically extended downward; a locking bolt 11 can be rotatably mounted on the upper inner part of a locking lock shell 12, a slider 13 can be slid up and down along the locking lock shell 12 and is arranged on the locking lock shell 12, and the upper end of the sky rod 2 is connected to the lower end of the slider 13; see Figure 7 The slider 13 includes a slider body 130 which is surrounded by a back plate 1302 and two side plates 1301 and has a shape matching the inner wall of the locking lock housing 12 , and can slide up and down in the locking lock housing 12 .

[0040] See also Figure 6 , 7 The locking bolt 11 has a locking groove 111 with a U-shaped cross section, which can be inserted into the locking catch piece 10 and is in a locked state. A hinge pin hole 113 for hinged connection with the locking lock shell 12 is provided below one side wall of the locking groove 111. Specifically, the locking bolt 11 is rotatably installed on the upper inner part of the locking lock shell 12 through the hinge pin hole 113 via the locking bolt hinge shaft 14; the other side wall of the locking groove 111 has an arc-shaped arm 112 extending downward, and a locking groove 114 with a U-shaped cross section is formed between the arc-shaped arm 112 and the outer wall of the hinge pin hole 113; the back plate of the slider body 130 of the slider 13 The upper end has a support arm 131 extending in an arc shape from horizontal to the upper right, or in other words, the upper ends of the two side plates of the slider body 130 have two support arms 131 extending in an arc shape from horizontal to the upper right, and a stop surface 133 is provided on the outer side of the support arm 131 for stopping the end of the arc arm 112 of the locking bolt 11, and a space 132 is formed between the support arm 131 and the two side plates of the slider body 130 for the arc arm 112 to be inserted when the locking groove 111 of the locking bolt 11 and the locking catch piece 10 are disengaged and the support arm 131 moves upward to disengage the arc arm 112 from the support.

[0041] See also Figure 1 , Figure 3 The sky rod 2 is in the shape of a vertical rod, the upper end of which is connected to the locked slider 13, and the lower end of which is connected to the middle lock 3.

[0042] See also Figure 8 , 9 The middle lock 3 comprises: a middle lock shell 31 of a rectangular parallelepiped arranged in a longitudinal direction, which comprises: a left end plate 3101, two middle lock shell side plates 3103 and an upper end plate and a lower end plate; a middle axis 32 is arranged on the middle lock shell 31 perpendicular to the direction of the plane where the emergency door is located, and a middle lock dial wheel 33 is installed on the middle axis 32; a left sliding piece 38 and a right sliding piece 39 arranged oppositely are arranged in the middle lock shell 31, and the middle parts of the left sliding piece 38 and the right sliding piece 39 form a space 37 for accommodating the middle lock dial wheel 33, and the upper and lower ends of the left sliding piece 38 and the right sliding piece 39 are fitted and fixed together by rivets 381, and extend from the guide holes 3102 at the upper and lower ends of the middle lock shell 31 and are respectively connected to the lower end of the sky rod 2 and the upper end of the ground rod 6, and a roller 35 parallel to the middle axis 32 is rotatably arranged on the outer side of the left sliding piece 38 and the right sliding piece 39 away from the push rod side, see Fig. 9 , 10The left slide 38 and the right slide 39 have holes 382 for installing the roller 35 on their outer sides. In this embodiment, the holes 382 are open on their outer sides to facilitate the installation of the roller 35. The middle lock dial 33 has a tooth 331 that cooperates with the roller 35. When the middle lock dial 33 rotates clockwise, the tooth 331 pushes the left slide 38 and the right slide 39 upwards through the roller 35 to unlock the door. Fig. 9 , 12 , 14, specifically, the central axis 32 is mounted on the central lock housing 31 through a bracket 36, the bracket 36 is a door-shaped bracket, and its two oppositely arranged side plates 361 have mounting holes 365 for mounting the central axis 32, the central axis 32 is cylindrical, and has two oppositely cut surfaces 321 on the surface of the central axis 32, and its cylindrical surface cooperates with the mounting holes 365, and the central lock dial wheel 33 has a mounting hole with the same shape as the cross-section of the central axis 32. The rotary cut surface 321 of the central axis is used to drive the lock dial wheel 33, so there is no need to add a key or pin shaft for fixing. Both ends of the central axis 32 have annular grooves 322, and the central axis 32 is axially fixed by the shaft end retaining ring 311 and the annular groove; the free end of the side plate 361 has a flange 362 connected to the left end plate 3101 of the central lock shell 31, and the central lock shell side plate 3103 corresponding to the central lock shell 31 and the central axis 32 is provided with a U-shaped groove 3104 for the central axis 32 to be embedded.

[0043] One end of a middle lock reset spring 34 is connected to a spring mounting hole 1 332 at the rear lower end of the middle lock dial wheel 33 opposite to the shifting tooth 331, and the other end of the middle lock reset spring 34 is connected to a spring mounting hole 2 364 at the lower end of the end plate 363 of the bracket 36. The middle lock reset spring 34 is used to reset the middle lock dial wheel 33 after unlocking.

[0044] Furthermore, the left slide 38 and the right slide 39 are located above the space 1 37 and protrude to both sides (outwards) respectively, forming a space 2 314 for accommodating the lock cylinder dial wheel 312 and the paddle 313, that is, the lock cylinder dial wheel 312 for key unlocking and the paddle 313 in contact with the lock cylinder dial wheel 312 are arranged in the space 2 314, and the two ends of the paddle 313 are riveted to the left slide 38 and the right slide 39. The lock cylinder dial wheel 312 can be toggled by the unlocking key, and the paddle 313 is further triggered to drive the left slide 38 and the right slide 39 to move upward to unlock.

[0045] The two ends of the push rod 4 are respectively connected to the middle lock 3 and the tail lock 5. Specifically, the extended end of the central axis 32 of the middle lock 3 is connected to one end of a rocker arm 41, and the end of the push rod 4 is connected to the other end of the rocker arm 41; by pushing the push rod 4 downward, the central axis 32 is driven to rotate clockwise through the rocker arm 41, and the middle lock dial wheel 33 is driven to rotate clockwise to trigger unlocking.

[0046] The tail lock 5 includes: a tail shaft 53 perpendicular to the plane where the emergency door is located and rotatably arranged on the tail lock housing 52, one end of the tail shaft 53 extending out of the tail lock housing 52 is connected to one end of another rocker arm 2 42, and one end of the rocker arm 2 42 is connected to the tail end of the push rod 4; when the push rod 4 is pushed downward, the rocker arm 1 41 drives the middle shaft 32 and the middle lock dial wheel 33 to rotate clockwise, triggering the unlocking.

[0047] The tail lock housing 52 is a rectangular housing which is open at the top and bottom and the front, and a tail lock cover 54 is provided at the front end.

[0048] The tail lock 5 further comprises: a tail lock dial wheel 51 arranged at the middle of the tail shaft 53 , and a tail lock return spring 55 connected between the tail lock dial wheel 51 and the tail lock housing 52 .

[0049] The lower end of the ground rod 6 is connected to the lower lock 7 .

[0050] The lower lock 7 includes: a longitudinal rectangular lower lock shell 71, the lower lock shell 71 is a columnar shell with open upper and lower ends and a door-shaped cross-section, and a lower lock cover plate 72 is provided at the front end. The lower lock shell 71 and the lower lock cover plate 72 form a square or rectangular columnar shell, the upper end of a lower lock latch 73 is connected to the lower end of the ground rod 6, and a guide plate 74 with a middle for the lower lock latch 73 to pass through is provided in the lower lock shell 71, and a lock plate 75 with a lock hole in the middle for the lower lock latch 73 to be inserted is fixed on the threshold of the emergency door.

[0051] See also Figure 4 Specifically, the two side plates 1301 at the lower end of the locked slider 13 are provided with a riveted column 17, and an upper screw rod 16 is connected through the riveted column 17. The upper screw rod 16 is threadedly connected to the sky rod 2. The function of the upper screw rod 16 is to install and adjust the position of the slider 13; the upper part of the lower locking latch 73 is a screw, which is threadedly connected to the lower end of the ground rod 6, and the length of the lower locking latch 73 can be adjusted so that it has a suitable extension amount to enter the lock hole of the locking plate 75.

[0052] See also Fig.19 , 20The manual unlocking process of the novel emergency door manual unlocking device described in this embodiment is: the push rod 4 is pressed down, and the middle shaft 32 and the tail shaft 53 are driven to rotate clockwise through the rocker arm 1 41 and the rocker arm 2 42, and the middle shaft 32 drives the middle lock dial wheel 33 to rotate clockwise, and the teeth 331 of the middle lock dial wheel 33 push the left slide plate 38 and the right slide plate 39 to move upward through the roller 35, and the stop surface 133 on the outer side of the support arm 131 of the slide block 13 is separated from the support of the arc arm 112 of the locking bolt 11, and the locking bolt 11 rotates clockwise under the action of eccentric gravity, and the arc arm 112 is inserted into the space 132, at this time, the U-shaped lock groove 111 of the locking bolt 11 is separated from the locking lock plate 10, and the unlocking is completed; after unlocking, the middle lock dial wheel 33 and the tail lock dial wheel 51 are in the middle lock reset spring 34, The tail lock rotates counterclockwise under the action of the return spring 55, and the left slide 38 and the right slide 39 fall down under the action of gravity. The stop surface 133 on the outer side of the support arm 131 of the slider 13 provides support for the arc arm 112 of the locking bolt 11, so that the locking bolt 11 rotates counterclockwise, and its U-shaped lock groove 111 is locked with the locking lock catch plate 10 to restore the locked state.

[0053] The above description is only illustrative rather than restrictive of the present invention. The present invention aims to provide a new manual unlocking device for platform door emergency door. Those skilled in the art understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the claims, but they will all fall within the protection scope of the present invention.

Claims

1. A new type of emergency door manual unlocking device, which include: An upper lock (1), a top rod (2), a middle lock (3), a push rod (4), a tail lock (5), a ground rod (6) and a lower lock (7); the characteristics are: The lock (1) comprises: a locking catch plate (10) fixedly mounted on the lintel of the emergency door and extending vertically downward, a locking bolt (11) rotatably mounted on the upper part of a locking lock shell (12), a slider (13) slidably mounted in the locking lock shell (12) along the locking lock shell (12), and the upper end of the sky rod (2) is connected to the lower end of the slider (13); when the slider (13) is in a low position, the upper end of the slider (13) and the lower end of the locking bolt (11) form a support, so that the upper end of the locking bolt (11) and the locking catch plate (10) remain in a locked state; when the slider (13) is in a high position, the lower end of the locking bolt (11) is separated from the support and rotates, and the locking catch plate (10) is unlocked; The sky rod (2) is in the shape of a vertical rod, and its lower end is connected to the middle lock (3); The central lock (3) comprises: a central lock housing (31) in a rectangular shape arranged longitudinally; a central axis (32) arranged on the central lock housing (31) in a direction perpendicular to the plane where the emergency door is located; and a central lock dial wheel (33) mounted on the central axis (32); a left sliding plate (38) and a right sliding plate (39) arranged opposite to each other are arranged in the central lock housing (31); a space (37) for accommodating the central lock dial wheel (33) is formed in the middle of the left sliding plate (38) and the right sliding plate (39); the upper and lower ends of the left sliding plate (38) and the right sliding plate (39) are fitted and fixed together and are automatically The guide holes (3102) at the upper and lower ends of the middle lock housing (31) extend out and are respectively connected to the lower end of the sky rod (2) and the upper end of the ground rod (6); a roller (35) parallel to the middle axis (32) is rotatably arranged on the outer sides of the left slide plate (38) and the right slide plate (39); the middle lock dial wheel (33) has a shifting tooth (331) matched with the roller (35); when the middle lock dial wheel (33) rotates clockwise, the shifting tooth (331) pushes the left slide plate (38) and the right slide plate (39) to move upwards via the roller (35) to unlock the lock; The tail lock (5) comprises: a tail shaft (53) perpendicular to the plane where the emergency door is located and rotatably arranged on the tail lock housing (52); The two ends of the push rod (4) are respectively connected to the middle shaft (32) of the middle lock (3) and the tail shaft (53) of the tail lock (5), and are used to drive the middle shaft (32) to rotate; The lower end of the ground rod (6) is connected to the lower lock (7); The lower lock (7) comprises: a lower lock housing (71) in the shape of a longitudinal rectangular parallelepiped, a lower lock latch (73) whose upper end is connected to the lower end of the ground rod (6), and a lock plate (75) having a lock hole in the middle for inserting the lower lock latch (73) and fixed on the threshold of the emergency door.

2. A novel emergency door manual unlocking device according to claim 1, Features: The locking bolt (11) has a locking groove (111) with a U-shaped cross section and in which the locking catch (10) can be inserted, in a locked state, and a hinge pin hole (113) for hinged connection with the locking lock housing (12) is provided below a side wall of the locking groove (111), and a locking bolt hinge shaft (14) passes through the hinge pin hole (113) to rotatably mount the locking bolt (11) on the upper inner portion of the locking lock housing (12); the other side wall of the locking groove (111) has an arc-shaped arm (112) extending downward, and a locking groove (114) with a U-shaped cross section is formed between the arc-shaped arm (112) and the outer wall of the hinge pin hole (113); the upper end of the slider (13) has a support arm (131) extending in an arc shape from horizontal to the upper right, and an arc-shaped arm (114) for stopping the locking bolt (11) is provided on the outer side surface of the support arm (131). A stop surface (133) is formed at the end of the support arm (131), and a space (132) is formed on the outer side of the support arm (131) for the arc-shaped arm (112) to be inserted when the lock groove (111) of the locking bolt (11) is disengaged from the locking catch piece (10). When the slider (13) is in a low position, the stop surface (133) of the support arm (131) supports the arc-shaped arm (112) and enables the locking catch piece (10) to be inserted into the lock groove (111) and be in a locked state. When the slider (13) slides to a high position, the end of the support arm (131) is disengaged from the arc-shaped arm (112), the locking bolt (11) rotates under the action of gravity, the arc-shaped arm (112) is inserted into the space (132), and the locking catch piece (10) is disengaged from the lock groove (111), thereby achieving unlocking.

3. A novel emergency door manual unlocking device according to claim 2, Features: The slider (13) comprises a slider body (130) which is surrounded by a back plate (1302) and two side plates (1301) and has a shape adapted to the inner wall of the locking lock housing (12); the support arm (131) is formed on the upper part of the back plate (1302) of the slider (13), and the space (132) is formed between the support arm (131) and the two side plates (1301) of the slider body (130).

4. A novel emergency door manual unlocking device according to claim 1, Features: The central axis (32) is arranged on the central lock housing (31) via a bracket (36) fixed on the central lock housing (31); the bracket (36) has a door-shaped cross section, and two oppositely arranged side panels (361) thereof are provided with mounting holes (365) for mounting the central axis (32); the free end of the side panel (361) is provided with a flange (362) connected to the left end plate (3101) of the central lock housing (31); and the central lock housing side panels (3103) of the central lock housing (31) corresponding to the central axis (32) are provided with U-shaped grooves (3104) for the central axis (32) to be embedded.

5. A novel emergency door manual unlocking device according to claim 1, Features: The protruding end of the central axis (32) of the central lock (3) is connected to one end of a rocker arm (41), and the end of the push rod (4) is connected to the other end of the rocker arm (41); One end of the tail shaft (53) extending out of the tail lock housing (52) is connected to one end of the second rocker arm (42), and one end of the second rocker arm (42) is connected to the tail end of the push rod (4); When the push rod (4) is pushed downward, the rocker arm (41) drives the central axis (32) and the central lock dial wheel (33) to rotate clockwise, thereby triggering the unlocking.

6. A novel emergency door manual unlocking device according to claim 4, Features: One end of a middle lock reset spring (34) is connected to the rear lower end of the middle lock dial wheel (33) opposite to the dial tooth (331), and the other end of the middle lock reset spring (34) is connected to the lower end of the end plate (363) of the bracket (36) for resetting the middle lock dial wheel (33) after unlocking; The tail lock (5) further comprises: a tail lock dial wheel (51) arranged in the middle of the tail shaft (53); and a tail lock return spring (55) connected between the tail lock dial wheel (51) and the tail lock housing (52).

7. A novel emergency door manual unlocking device according to claim 1, Features: A guide plate (74) having a guide hole in the middle for the lower lock latch (73) to pass through is provided in the lower lock housing (71).

8. A novel emergency door manual unlocking device according to claim 1, Features: The left slide (38) and the right slide (39) protrude outwards above the space one (37) to form a space two (314), and a lock cylinder dial wheel (312) for unlocking with a key and a paddle (313) in contact with the lock cylinder dial wheel (312) are provided in the space two (314), and two ends of the paddle (313) are riveted to the left slide (38) and the right slide (39).

9. A novel emergency door manual unlocking device according to claim 3, Features: A riveted column (17) is provided on one of the two side plates (1301) at the lower end of the locking slider (13), and the riveted column (17) is connected to an upper screw rod (16), and the upper screw rod (16) is threadedly connected to the top end of the sky rod (2); the upper part of the lower locking latch (73) is a screw rod, and the lower locking latch (73) is threadedly connected to the lower end of the ground rod (6).

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