Elevator with a hidden emergency device

Abstract

The present application relates to elevator technology field, specifically relates to a kind of elevator with hidden emergency device of car, including the car in hoistway, installation port is opened in the thickness direction through in car side wall, and rotatingly installed with display device in car inner wall.Display device blocks installation port, and power supply assembly, controller and speed sensor are embedded in display device.Display device is electrically locked between car, and electrically locked is used to lock display device and car.Car outside is provided with anti-falling brake mechanism, and the rear side of display device close to installation port is hinged with one end of pull rod assembly, and the other end of pull rod assembly is connected with the locking assembly of anti-falling brake mechanism after passing through installation port, and anti-falling brake mechanism has working state and locking state.In locking state, locking assembly locks anti-falling brake mechanism, and anti-falling brake mechanism does not hinder the lifting of car.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to an elevator with a concealed emergency device in the car. Background Technology

[0002] Elevator overspeed descent is a fatal safety accident type in the operation of elevators in high-rise buildings. Currently, standard elevator fall protection systems include active and passive fall protection systems. In an active braking system, an electromagnetic brake is installed at the elevator traction machine. The brake's opening and closing is controlled by electrical components such as the traction machine, speed sensors outside the car, the main control communication module, and the linkage control circuit. When the elevator just begins to stall and fall, the power to the brake is actively disconnected, causing the brake to lock the traction machine and achieve elevator braking. In a passive fall protection system, a speed governor and safety brake externally mounted in the shaft are used for linkage braking.

[0003] However, if the sensors and communication components in the shaft age and malfunction, or if the shaft is in extreme conditions such as fire or high temperature smoke, even though the purely mechanical structures such as the brakes fixed in the shaft have strong stability and resistance to damage, the failure of the electrical control and sensing equipment and communication lines in the shaft can still cause the active fall protection system to malfunction.

[0004] In other words, after the original active fall protection system fails, there is no redundancy of other active fall protection systems; therefore, it is impossible to brake the elevator in time in the event of a slight stall, and it can only rely on the speed governor and safety brake as the final braking and fall protection measures in the event of a severe stall. Summary of the Invention

[0005] The present invention provides an elevator with a concealed emergency device in the car, which can solve at least one of the above-mentioned technical problems.

[0006] To address the aforementioned technical problems, one or more embodiments of the present invention provide an elevator with a concealed emergency device in the car, comprising a car located within a shaft, a mounting opening extending through the thickness direction in the side wall of the car, and a display device rotatably mounted on the inner wall of the car. The display device blocks the mounting opening and incorporates a power supply assembly, a controller, and a speed sensor. An electric lock is provided between the display device and the car to lock the display device to the car. The display device is rotatably connected to the side wall of the car via a rotating shaft, on which a torsion spring is provided to drive the display device to rotate away from the mounting opening.

[0007] An anti-fall braking mechanism is installed on the outside of the car. One end of a pull rod assembly is hinged to the rear side of the display device near the mounting opening. The other end of the pull rod assembly passes through the mounting opening and connects to the locking component of the anti-fall braking mechanism. The anti-fall braking mechanism has an active state and a locked state. In the locked state, the locking component locks the anti-fall braking mechanism, which does not obstruct the car's ascent or descent. When the car's descent speed exceeds a preset threshold, the controller unlocks the electric lock. The display device, driven by a torsion spring, rotates inwards from the mounting opening, causing the pull rod assembly to release the locking component, thus engaging the anti-fall braking mechanism to brake the car. The preset threshold is greater than the first speed threshold triggered by the elevator traction machine's brake, but less than the second speed threshold triggered by the elevator's speed governor.

[0008] The beneficial effects of one or more of the above technical solutions are as follows: 1. This invention installs a display device inside the car, embedding the speed sensor and controller within it, thus forming a protective structure based on the car's main body. Furthermore, this backup speed sensor and controller, housed within the car's display device, receives better physical protection during normal operation and is less prone to damage or malfunction. In the event of failure of the external active fall arrest system, this invention facilitates a second level of active fall arrest, minimizing the need for speed limiters and safety brakes to prevent severe falls.

[0009] 2. This invention only triggers the unlocking action in high-risk situations where the car's descent speed exceeds the conventional overspeed threshold and the external active anti-fall system is deemed to have failed. This avoids uneven force and sudden speed changes caused by the simultaneous activation of multiple anti-fall systems.

[0010] 3. This invention integrates the emergency braking trigger linkage structure into the display device on the side wall of the car. Under normal conditions, the display device completely seals the installation opening, with no exposed emergency mechanism components, thus not disrupting the integrity of the car's interior decoration and not occupying additional installation space inside the car. After unlocking the electric lock at the display device, the locking components can be quickly unlocked, enabling the braking of the active anti-fall system of this invention. Attached Figure Description

[0011] Figure 1 This is an axonometric schematic diagram of some structures in an embodiment of the present invention.

[0012] Figure 2 for Figure 1 Enlarged structural diagram of part A.

[0013] Figure 3 This is an axonometric schematic diagram of the car in an embodiment of the present invention.

[0014] Figure 4 This is a schematic diagram of the car from the main view direction in an embodiment of the present invention.

[0015] Figure 5 for Figure 4 A sectional view along the AA direction.

[0016] Figure 6 for Figure 5 A schematic diagram showing the display device rotating towards the interior of the car to actuate the lever assembly.

[0017] Figure 7 This is a partial structural cross-sectional view of the car side wall in an embodiment of the present invention.

[0018] Figure 8 This is a cross-sectional view of the limiting sleeve and wedge block and other parts of the structure in an embodiment of the present invention.

[0019] Reference numerals: 1. Hoistway; 2. Car; 201. Control panel; 202. Side wall; 203. Car door; 204. Top plate; 3. Traction wire rope; 4. Handle; 5. Guide rail; 6. Anti-fall braking mechanism; 601. Limit sleeve; 602. Limit bracket; 603. Locking pin; 604. Bracket; 605. Emergency wire rope; 606. Hole; 608. Wedge block; 7. Tie rod assembly; 701. First tie rod; 702. Second tie rod; 8. Mounting port; 9. Electric lock; 10. Display device; 11. Rotating shaft. Detailed Implementation

[0020] Those skilled in the art should understand that the embodiments described below are merely preferred embodiments of this application, and these preferred embodiments are only used to explain the technical principles of this application and are not intended to limit the scope of protection of this application.

[0021] It should be noted that in the description of this application, terms such as "center," "upper," "lower," "top," "bottom," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can also refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] like Figures 1 to 8 As shown, this embodiment discloses an elevator with a concealed emergency device in the car 2, including a car 2 located within a shaft 1. The car 2 has an operating panel 201 on the wall of each floor. The car 2 includes a car door 203, left and right side walls 202, a top plate 204, and a floor plate. The top of the car 2 is driven by multiple traction steel cables 3 to achieve lifting and lowering. Guide rails 5 are respectively provided on the inner walls of the left and right sides of the shaft 1. These guide rails 5 cooperate with the sliders on the outer side of the car 2 to guide the car 2 during lifting and lowering.

[0024] The car 2 has at least one side wall 202 along the left and right directions with an installation opening 8 that extends through the thickness of the plate. The inner walls of the car 2 are rotatably fitted with inwardly flip-up display devices 10. Each display device 10 corresponds to and blocks the installation opening 8, so that the entire emergency triggering structure is normally concealed without compromising the integrity of the car 2. The display device 10 internally integrates an independent power supply component, controller, and speed sensor (not shown in the figure). The entire speed detection and control unit is built into the car 2, relying on the car 2 shell for physical protection, and operates independently of the external electrical control, communication, and sensing systems of the hoistway 1. More specifically, the display device 10 has its own power supply component to power the controller, speed sensor, and the electric lock 9 described below.

[0025] Electric locks 9 are installed between the display device 10 and the side wall 202 of the car 2. The electric locks 9 achieve mechanical locking, restricting the arbitrary rotation of the display device 10 and avoiding problems caused by the elevator's normal operation being bumpy or by passenger misoperation. The display device 10 is rotatably connected to the side wall 202 of the car 2 via a rotating shaft 11. The rotating shaft 11 is equipped with a torsion spring (not shown in the figure) that drives the display device 10 to rotate in a direction away from the mounting port 8.

[0026] A fall arrestor braking mechanism 6 is installed on the outer side of the car 2, corresponding to the display device 10. One end of a pull rod assembly 7 is hinged to the rear end face of the display device 10 near the mounting opening 8. The end of the pull rod assembly 7 away from the display device 10 extends through the mounting opening 8 to the outer side of the car 2 and is connected to the locking component of the corresponding fall arrestor braking mechanism 6. The fall arrestor braking mechanism 6 has two stable operating states: a locked state and a working state, which can be switched according to the normal operating state of the car 2 and the high-speed fall failure state.

[0027] In the locked state, the locking component locks the anti-fall braking mechanism 6, and the anti-fall braking mechanism 6 does not obstruct the lifting and lowering of the car 2; when the falling speed of the car 2 exceeds the preset threshold, the controller controls the electric lock 9 to unlock, and the display device 10 is driven by the torsion spring to rotate inward of the car 2, that is, away from the installation port 8, which can drive the pull rod assembly 7 to release the locking component, so that the anti-fall braking mechanism 6 is in working state, and the anti-fall braking mechanism 6 acts to brake the car 2; the preset threshold is greater than the first speed threshold triggered by the brake in the active anti-fall system at the elevator traction machine, and less than the second speed threshold triggered by the speed governor in the passive anti-fall system of the elevator.

[0028] The main improvement of this embodiment lies in providing an additional active fall protection system with monitoring elements located inside the car 2, instead of relying on the inherent mode of external electrical control sensors and communication lines triggering braking in the hoistway 1. This invention integrates the detection and control components inside the car 2, reducing the adverse effects of high temperatures and circuit burnout in the hoistway 1. It also sets an overspeed judgment threshold higher than that of the traction brake, activating only when the external active fall protection system fails and the car 2 experiences a high-risk, high-speed fall. This constitutes a redundant active fall protection system for elevator safety.

[0029] Specifically, the speed sensor and controller in each display device 10 can be designed with redundancy, with at least two sets set in parallel, to avoid the inability to open the electric lock 9 due to the failure of a single set.

[0030] Specifically, in this embodiment, the anti-fall braking mechanism 6 includes an emergency steel wire rope 605 vertically arranged inside the hoistway 1. The emergency steel wire rope 605 is made of high-temperature resistant material, and its upper and lower ends are rigidly fixed to the top and bottom of the hoistway 1, respectively, so that it can temporarily maintain structural integrity and stable load-bearing performance under short-term fire conditions. The anti-fall braking mechanism 6 also includes a vertical limiting sleeve 601 fixedly mounted on the outside of the car 2 and two wedge-shaped blocks 608 embedded inside the limiting sleeve 601. The emergency steel wire rope 605 vertically passes through the limiting sleeve 601 and the center of the two wedge-shaped blocks 608. The inner wall of the limiting sleeve 601 is provided with a wedge-shaped inclined surface structure that is narrow at the top and wide at the bottom. The outer wall of the wedge block 608 is provided with a wedge-shaped outer wall that fits completely with the wedge-shaped inner wall of the limiting sleeve 601. The wedge-shaped inclined surface gradually approaches the center of the limiting sleeve 601 in the upward direction, so that when the car 2 falls, the wedge block 608 can slide vertically relative to the limiting sleeve 601 and automatically retract and clamp towards the center, forming a self-locking clamping braking effect.

[0031] To achieve normal locking and emergency unlocking functions, this embodiment is equipped with a locking assembly, which includes a bracket 604 and a locking pin 603. The bracket 604 is fixedly installed on the outer wall of the car 2, and the bottom wall of the limiting sleeve 601 is entirely fixed to the upper surface of the bracket 604, preventing it from sliding with the wedge blocks 608. The bottom of the limiting sleeve 601 has multiple perforated holes 606 for the locking pin 603 to pass through. The lower ends of the two wedge blocks 608 are supported on the upper surface of the bracket 604, with the bracket 604 providing vertical support and limiting to prevent the wedge blocks 608 from falling off or shifting.

[0032] The locking pin 603 is horizontally arranged, passing sequentially through the hollow hole 606 at the bottom of the limiting sleeve 601, and horizontally inserted into the corresponding pin holes of the limiting frame 602 and the two wedge blocks 608, achieving synchronous locking and positioning of the two wedge blocks 608. The left and right ends of the locking pin 603 are supported and limited by the limiting frame 602, which is supported and fixed by the bracket 604. Under normal conditions, the locking pin 603 is stably inserted into the pin holes of the wedge blocks 608, locking the two wedge blocks 608 and restricting their vertical sliding, ensuring that the anti-fall braking mechanism 6 remains stably locked, and preventing braking interference during normal lifting and lowering of the car 2. Specifically, the two limiting frames 602 and the two wedge blocks 608 are respectively provided with the aforementioned pin holes.

[0033] The outer end of the pull rod assembly 7 is hinged to the end of the locking pin 603, forming a mechanical linkage unlocking structure. When an extreme fall condition is triggered and the electric lock 9 is unlocked, the display device 10 flips inward toward the car 2. During the rotation of the display device 10, the pull rod assembly 7 is displaced as a whole, causing the locking pin 603 to move outward horizontally. This causes the locking pin 603 to exit the pin hole of the wedge block 608 and the bracket 604, releasing the locking limit on the two wedge blocks 608. The wedge blocks 608 switch to a state where they can slide freely vertically, and the fall arrest braking mechanism 6 switches to the working state simultaneously, providing emergency braking capability.

[0034] A friction pad (not shown in the figure) is fixedly installed on the inner contact surface of the wedge block 608 and the emergency wire rope 605. The high friction coefficient pad can improve the adhesion friction between the wedge block 608 and the wire rope, avoiding slippage, displacement, and braking failure during high-speed descent braking. Specifically, the locking pin 603 and the limiting bracket 602 are provided with an anti-rust coating to reduce the probability of the locking pin 603 getting stuck in the limiting bracket 602 and the wedge block 608.

[0035] Specifically, to achieve the reset of the wedge block 608, an electric push rod (not shown in the figure) can be installed on the limiting sleeve 601. The rod body is parallel to the axial direction of the limiting sleeve 601, and passes downward through the vertical stop hole in the limiting sleeve 601 to abut against the wedge-shaped outer wall at the upper end of the wedge block 608. Under normal circumstances, the rod body does not push the wedge block 608 down. When reset is required, the electric push rod pushes the wedge block 608 down.

[0036] Alternatively, in some other embodiments, after the elevator is raised to the top of the shaft 1, the staff uses the stop hole on the limit sleeve 601 to manually push the wedge block 608 downward with the push rod to complete the reset.

[0037] In this embodiment, a double-sided symmetrical arrangement structure is adopted. A set of display devices 10 and a set of anti-fall braking mechanisms 6 are symmetrically arranged on both sides of the car 2 in the left and right directions, which further improves the braking load-bearing capacity and stability of the elevator in the case of heavy load and high speed fall.

[0038] In this embodiment, the controller establishes reliable electrical connections with the speed sensor and the electric lock 9, respectively. The speed sensor collects the lifting speed signal of the car 2 in real time and transmits it to the controller. The controller has a preset falling speed threshold that is higher than the conventional overspeed standard. Only when the controller detects a high-speed fall of the car 2 and determines that the external active anti-fall system of the hoistway 1 has completely failed will it output a control signal to unlock the electric lock 9, and at the same time, the torsion spring controls the display device 10 to flip. Normal slight overspeed and equipment vibration will not trigger unlocking, avoiding the risk of accidental braking.

[0039] To accommodate the flipping and pulling stroke and compensate for assembly gaps, the pull rod assembly 7 adopts a segmented hinged structure, including a first pull rod 701 and a second pull rod 702 that are hinged to each other at their ends. The first pull rod 701 is hinged to the rigid plate on the back of the display device 10, and the second pull rod 702 is hinged to the locking pin 603.

[0040] The display device 10 includes an outer frame and an inner display screen body. A rigid plate is fixedly mounted on the back of the display device 10, and the rigid plate is reliably fixed to the frame on all four sides. The end of the tie rod assembly 7 is hinged to the rigid plate. By using the rear rigid plate as the main load-bearing base, the thin shell structure of the display device 10 is prevented from being directly deformed by stress. In addition, the display device 10 is provided with a handle 4, which can be used to close the display device 10 during the installation stage and seal the mounting port 8.

[0041] It should be noted that the emergency steel wire rope 605 here is close to the guide rail 5 clamped by the safety clamp on the side of the elevator car 2, thereby reducing the uneven force distribution caused by the anti-fall mechanism, speed governor, and safety clamp braking simultaneously. Furthermore, the structural strength of this invention can be designed by those skilled in the art to prevent the elevator car 2 from being torn during braking.

[0042] Furthermore, a time-sequential shielding structure is incorporated between the existing electromagnetic brake-type active fall arrestor system, the fall arrestor braking system of this invention, and the existing purely mechanical speed limiter and safety clamp fall arrestor systems to delay the triggering of the subsequent fall arrestor system. However, if the preceding electrical control fails, the subsequent fall arrestor system loses its shielding and can be triggered immediately.

[0043] Specifically, the timing shielding here can be achieved by a time delay relay and an electromagnetic limit valve controlled by the time delay relay. More specific timing shielding structures can be set by those skilled in the art, and will not be elaborated here.

[0044] The overall working principle of this device is as follows: Under normal elevator operation, the external active anti-fall system of the hoistway 1 operates normally, providing conventional overspeed protection. In the hidden locked state, the electric lock 9 securely locks the display device 10, which in turn tightly seals the mounting opening 8 on the side wall 202 of the car 2. The locking pin 603 engages and locks two wedge blocks 608, restricting their vertical sliding. The anti-fall braking mechanism 6 remains locked, preventing it from gripping the emergency steel wire rope 605 and thus not obstructing the normal lifting and lowering of the car 2.

[0045] When the external sensors, controllers, communication lines, and control circuits installed in hoistway 1 malfunction, causing the entire conventional external active fall protection system to fail, the car 2 will fall out of control at high speed. The speed sensor and controller built into the car 2 are not affected by the extreme environment of hoistway 1 and can independently collect the fall speed data. When the fall speed exceeds the preset threshold, the controller determines that the external active fall protection system has failed and then outputs a control signal to unlock the electric lock 9.

[0046] After the electric lock 9 is unlocked, the torsion spring drives the display device 10 to flip inward to the inside of the car 2. The display device 10 pulls the pull rod assembly 7 through the rear rigid plate. The pull rod assembly 7 is pulled by force to move the locking pin 603 out of the pin hole laterally, releasing the locking limit on the two wedge blocks 608.

[0047] During the continuous descent of the car 2, the wedge block 608 and the limiting sleeve 601 move downwards simultaneously. However, the wedge block 608 slides upwards relative to the limiting sleeve 601 due to friction from the emergency wire rope 605. The wedge block 608 adaptively moves upwards along the wedge-shaped inner wall of the limiting sleeve 601 and clamps towards the center. The friction pad on the inner side of the wedge block 608 is tightly attached to the outer wall of the emergency wire rope 605. Relying on the self-locking friction force, the wedge block 608 locks onto the emergency wire rope 605, consuming the descent kinetic energy of the car 2 and achieving emergency braking of the car 2.

[0048] After the emergency fault is cleared, the elevator's traction machine, in conjunction with the traction steel wire rope 3, causes the elevator to rise a certain distance, and the limit sleeve 601 and wedge block 608 are no longer under force. The wedge block 608, tie rod assembly 7, and display device 10 are reset, and each mechanism automatically returns to its initial locked and hidden state. The device can be reused.

[0049] If the active fall protection system of the present invention still fails, for example, if the electric lock 9 is stuck or the braking effect of the wedge block 608 in the limit sleeve 601 is insufficient and the elevator cannot be braked and decelerated within the set time, then the existing purely mechanical speed governor and safety clamp will serve as the last purely mechanical fall protection trigger.

[0050] The specific embodiments described above should not be construed as limiting the scope of protection of this invention. Any alternative modifications or variations made to the embodiments of this invention by those skilled in the art will fall within the scope of protection of this invention. Any aspects not detailed in this invention are well-known to those skilled in the art.

Claims

1. An elevator with a concealed emergency device in the car, characterized in that, The system includes a car housed within a hoistway. The car's side wall has a through-hole extending along its thickness. A display device is rotatably mounted on the car's inner wall. The display device blocks the through-hole and includes a power supply unit, a controller, and a speed sensor. An electric lock is installed between the display device and the car to secure them. The display device is rotatably connected to the car's side wall via a rotating shaft, which has a torsion spring that drives the display device to rotate away from the through-hole. An anti-fall braking mechanism is provided on the outside of the car. One end of a pull rod assembly is hinged to the rear side of the display device near the mounting opening. The other end of the pull rod assembly passes through the mounting opening and is connected to the locking assembly of the anti-fall braking mechanism. The anti-fall braking mechanism has a working state and a locking state. In the locked state, the locking component locks the anti-fall braking mechanism, and the anti-fall braking mechanism does not obstruct the raising and lowering of the car; when the car's falling speed exceeds a preset threshold, the controller controls the electric lock to unlock, and the display device is driven by the torsion spring to rotate towards the inside of the car and away from the installation port, so as to drive the pull rod assembly to release the locking component, so that the anti-fall braking mechanism is in working state, and the anti-fall braking mechanism acts to brake the car. The preset threshold is greater than the first speed threshold triggered by the brake at the elevator traction machine, and less than the second speed threshold triggered by the elevator speed governor.

2. The elevator with a concealed emergency device in the car according to claim 1, characterized in that, The anti-fall braking mechanism includes an emergency steel wire rope installed in the hoistway, with the upper and lower ends of the emergency steel wire rope fixedly connected to the top and bottom of the hoistway, respectively. The anti-fall braking mechanism also includes a vertical limiting sleeve fixed to the car and two wedge-shaped blocks embedded in the limiting sleeve. The emergency steel wire rope passes through the limiting sleeve, and the two wedge blocks slide vertically with the inner wall of the limiting sleeve; the limiting sleeve has a wedge-shaped inner wall, and the wedge blocks have a wedge-shaped outer wall that fits against the wedge-shaped inner wall, and the wedge-shaped outer wall gradually approaches the center of the limiting sleeve in the upward direction.

3. The elevator with a concealed emergency device in the car according to claim 2, characterized in that, The locking assembly includes a bracket and a locking pin. The bracket is fixed to the outer wall of the car, and the bottom wall of the limiting sleeve is fixed to the bracket. The bottom of the limiting sleeve has multiple hollow holes. The lower end of the wedge block is supported by a bracket, and the locking pin passes through the hollow hole to enter the wedge block from the outside of the limiting sleeve. The two ends of the locking pin are supported by limiting frames, which are fixed by the bracket. The locking pin is horizontally inserted into the pin holes of the limiting frame and the two wedge blocks.

4. The elevator with a concealed emergency device in the car according to claim 3, characterized in that, The end of the pull rod assembly furthest from the display device is hinged to the end of the locking pin. When the display device rotates, it pulls the pull rod assembly to drive the locking pin out of the pin hole, thereby disengaging the locking assembly from locking.

5. The elevator with a concealed emergency device in the car according to claim 2, characterized in that, The contact side between the wedge block and the emergency wire rope is provided with a friction pad.

6. The elevator with a concealed emergency device in the car according to claim 1, characterized in that, The display devices are symmetrically arranged on both sides of the car along the left and right directions, and the anti-fall braking mechanism that cooperates with the corresponding display device is respectively provided on the outer side of the left and right directions of the car.

7. The elevator with a concealed emergency device in the car according to claim 1, characterized in that, The controller is electrically connected to the speed sensor and the electric lock respectively. The controller receives the detection signal from the speed sensor. When the descent speed of the car is detected to be greater than a preset threshold, the controller controls the electric lock to unlock.

8. The elevator with a concealed emergency device in the car according to claim 1, characterized in that, The pull rod assembly includes a first pull rod and a second pull rod hinged at both ends. The first pull rod is hinged to the display device, and the second pull rod is hinged to a locking pin.

9. The elevator with a concealed emergency device in the car according to claim 1, characterized in that, The display device includes a frame and a display screen. A rigid plate is provided on the back of the display device. The rigid plate is fixed to the frame around its perimeter and is used to connect one end of the pull rod assembly.

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