Emergency vehicle door opening mechanism

Abstract

The application relates to an emergency vehicle door opening mechanism, belonging to the technical field of vehicle door emergency opening, which comprises a U-shaped mounting frame arranged on a B column of a vehicle, a bidirectional folding frame fixedly arranged in the mounting frame, two longitudinally arranged separable and spliced hooks in the bidirectional folding frame, two folding springs arranged in the bidirectional folding frame, and two separable and spliced hooks connected with the two folding springs respectively. The two separable and spliced hooks keep a combined state under normal conditions and are used for locking control in cooperation with a vehicle door lock core. The separable and spliced hooks are composed of a sliding mounting plate slidingly arranged in the bidirectional folding frame and an L-shaped connecting rod fixedly arranged on the sliding mounting plate. After the two separable and spliced hooks are spliced into an L shape, a U-shaped buckle is formed and is used for buckling the vehicle door lock core. The application not only can quickly unlock the vehicle door lock, but also is convenient for forcibly opening the vehicle door when the vehicle door is deformed, is convenient for being additionally arranged on the vehicle in the later period, and has high applicability.

Description

Technical Field

[0001] This invention relates to the field of emergency door opening technology, and in particular to an emergency door opening mechanism. Background Technology

[0002] As an indispensable means of transportation in modern society, automobiles not only greatly facilitate people's travel but also play a crucial role in promoting national economic development and social progress. However, when a vehicle is involved in a traffic accident and loses power, it can create safety hazards. In the event of a power outage, the side door locks may malfunction, making the doors difficult to open. This not only increases the difficulty of passenger escape in an emergency but may also delay rescue personnel's opportunity to provide assistance.

[0003] To address this issue, Chinese invention patent CN111852214A discloses a car door lock structure with an emergency opening function and its usage method. The structure includes a transmission mechanism comprising an inward-opening handle and a first opening rocker arm, a first unlocking rocker arm, and a second unlocking rocker arm, all mounted on the car door lock housing. The inward-opening handle is connected to the first opening rocker arm via an inward-opening cable. The first end of the first opening rocker arm abuts against the first end of the first unlocking rocker arm, and the second end of the first unlocking rocker arm is rotatably connected to the first end of the second unlocking rocker arm. An opening mechanism includes a second opening rocker arm and a limiting block coaxially connected to the housing. The second opening rocker arm abuts against the second end of the first opening rocker arm, and the limiting block abuts against the door lock's latch. The latch is rotatably mounted on the housing. An unlocking stop mechanism includes an unlocking rod, with both ends of the unlocking rod slidably connected to the second unlocking rocker arm and the second opening rocker arm, respectively.

[0004] In the aforementioned disclosed technical solution, the opening action is performed by linking the inner opening handle and the inner opening cable to the opening mechanism. This causes the first opening rocker arm to move through the unlocking rod, the protrusion, and the locking block to the limit block, thereby resetting the lock tongue and opening the door lock. However, the unlocking method is mainly by pulling the inner opening handle, which needs to be installed on the door, directly exposed and with a certain protrusion, posing a risk of accidental activation. Furthermore, it requires significant modifications to the door and is difficult to retrofit after leaving the factory according to actual needs. It can only be assembled during vehicle production. Therefore, this application is hereby submitted. Summary of the Invention

[0005] To overcome the technical defects of the existing technology, the present invention provides an emergency door opening mechanism, which is simple and quick to operate, easy to install later, and easy to open when the door is deformed.

[0006] The technical solution adopted in this invention is as follows: a U-shaped mounting frame is placed on the B-pillar of a car. A two-way retractable frame is fixedly installed inside the mounting frame. Two detachable splicing hooks are longitudinally installed inside the two-way retractable frame. Two retractable springs are also installed inside the two-way retractable frame. The two retractable springs are respectively connected to the upper and lower detachable splicing hooks. Under normal conditions, the two detachable splicing hooks are kept in a combined state under the pull of the retractable springs, which is used to cooperate with the door lock cylinder for locking control. After the two detachable splicing hooks are combined, a traditional U-shaped structure can be formed.

[0007] The detachable splicing hook consists of a sliding mounting plate and an L-shaped connecting rod slidably disposed within a two-way retractable frame. The L-shaped connecting rod is fixedly disposed on the sliding mounting plate. The upper and lower L-shaped connecting rods of the detachable splicing hook are spliced ​​together to form a U-shaped buckle, which is used to engage the door lock cylinder. The splicing hook structure design allows the door lock to be opened without controlling it in case of an unexpected situation. Simply controlling the two L-shaped connecting rods to separate the detachable splicing hook from the lock cylinder can achieve quick unlocking.

[0008] The mounting frame contains two first guide wheels positioned above and below the bidirectional retracting frame. A second guide wheel is rotatably mounted at the center of the inner side wall of the mounting frame. A guide wire is fixed to the side wall of the sliding mounting plate, and the guide wire passes around the first guide wheel and is fixedly connected to the second guide wheel. A rotating lever for controlling the rotation of the second guide wheel is rotatably mounted within the mounting frame. In practical application of this invention, when an emergency opening of the car door is required, simply pull the rotating lever out of the mounting frame and rotate it to drive the second guide wheel to rotate, thereby winding up the wire. This allows the other end of the wire to pull the sliding mounting plate, causing the two L-shaped connecting rods to separate, thus releasing the lock cylinder of the car door from its restraints. At this point, the car door can be opened quickly.

[0009] Preferably, the bidirectional retractable frame consists of two limiting strips respectively disposed on both sides of the inner wall of the mounting frame and a connecting central column for connecting the two limiting strips. One end of the retractable spring is fixed to the connecting central column, and the other end is connected to the sliding mounting plate. The bidirectional retractable frame has an overall H-shaped structure. The limiting strips on both sides provide sliding space for the sliding mounting plate. The retractable spring is located in the middle position, which can apply a relatively stable pulling force to the sliding mounting plate, so that the L-shaped connecting rods on the two sliding mounting plates remain in a combined state.

[0010] Preferably, sliding grooves are provided on the side walls of the two limiting strips facing each other, and strip-shaped protrusions are provided on both side walls of the sliding mounting plate for sliding into the sliding grooves, so that the sliding mounting plate and the limiting strips have a relatively stable connection structure and will not wobble, thereby ensuring the alignment and stability of the two L-shaped connecting rods.

[0011] Preferably, the rotating lever includes a strip handle and a retractable sleeve fixedly mounted on the strip handle. The retractable sleeve passes through the mounting frame and is connected to the second guide wheel. The retractable sleeve is a telescopic rod in which the inner and outer rods cannot rotate relative to each other. After the retractable sleeve extends, the strip handle can disengage from the strip-shaped storage groove of the mounting frame. Then, the rotation of the strip handle can drive the retractable sleeve to rotate as a whole, thereby driving the second guide wheel to rotate. This causes the second guide wheel to simultaneously wind up the upper and lower steel wires, thereby pulling the upper and lower sliding mounting plates together with the L-shaped connecting rods, causing the two L-shaped connecting rods to separate, thus realizing the quick door unlocking and opening function.

[0012] Preferably, the top and bottom sides of the strip handle are provided with a latching groove for pulling the strip handle and the telescopic sleeve out of the mounting frame with both hands. This makes it easy to manually remove the strip handle from the mounting frame. When not in use, the strip handle is placed in the strip storage groove of the mounting frame. It has no protruding parts, which is not only aesthetically pleasing but also prevents accidental contact and enhances safety.

[0013] Preferably, both sides of the strip handle are provided with side slots, and a rotating handle is rotatably installed in the side slot. The two rotating handles can be magnetically connected after being rotated to a horizontal position. A baffle plate is provided in the middle of the side slot to limit the rotation angle of the rotating handle to within 90 degrees. The two rotating handles can also be rotated out during use to form a cross structure with the strip handle, which makes it easier to rotate and operate in narrow spaces inside the vehicle.

[0014] Preferably, the outer wall of the mounting frame is provided with a strip-shaped storage groove for inserting a strip-shaped handle, and a circular through hole is provided in the strip-shaped storage groove for the retractable sleeve rod to pass through. One side of the mounting frame is provided with a groove for the door lock cylinder to enter and connect with the detachable splicing hook.

[0015] Preferably, the inner wall of the mounting frame is provided with a strip groove, and a trapezoidal slider is slidably disposed in the strip groove. The side wall of the trapezoidal slider is provided with a sliding retaining strip for engaging with the strip groove. The side wall of the trapezoidal slider is fixedly connected to the detachable splicing hook through an outward push rod. When the two detachable splicing hooks move, the trapezoidal slider can be moved synchronously by the outward push rod.

[0016] Preferably, the inner wall of the mounting frame is also provided with an elastic push rod that can be pushed out of the mounting frame by the trapezoidal slider. The mounting frame is provided with a square through slot for the elastic push rod to pass through. When the car door encounters an unexpected situation and needs to be opened manually, it can be unlocked by rotating the lever. In addition, if the car door is deformed, it may still be impossible to open even if the lock cylinder is separated from the detachable splicing hook. At this time, it is only necessary to continuously control the rotation of the lever to continuously pull the sliding mounting plate outward. The trapezoidal slider can be pushed towards each elastic push rod through the outward push linkage, so that the trapezoidal slider pushes each elastic push rod towards the outside of the mounting frame, thereby pushing the car door that is attached to the outside of the mounting frame outward.

[0017] Preferably, the elastic push rod consists of a movable rod that can pass through a square through-slot, an extension piece fixedly disposed on one side of the movable rod, and an elastic push rod fixed to the inner wall of the mounting frame. The telescopic end of the elastic push rod is fixedly connected to the extension piece. Under normal conditions, the elastic push rod pushes out the extension piece and the movable rod, so that the movable rod is inside the mounting frame. A conical top block is provided at the end of the movable rod facing the square through-slot. Under the control of the elastic push rod, when the trapezoidal slider does not apply pressure to the elastic push rod, the elastic push rod pushes the movable rod into the mounting frame and will not be exposed. When pushed by the trapezoidal slider, the elastic push rod is compressed, and the movable rod can push the conical top block outward, thereby pushing out the door that is attached to the outer wall of the mounting frame.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention uses two detachable and splicable hooks to form a traditional U-shaped structure, which does not require modification to the existing car door lock structure. It can be used simply by fixing the mounting frame of this application to the existing B-pillar of the vehicle body with screws. The modification to the vehicle is minimal and the applicability is strong.

[0020] 2. The hook used in this invention for connecting with the door lock cylinder adopts a spliced ​​hook design, so that when the vehicle encounters an unexpected situation and the door needs to be opened, it is not necessary to control the door lock. Simply controlling the separation of the two L-shaped connecting rods can separate the detachable spliced ​​hook from the lock cylinder, thereby achieving quick unlocking.

[0021] 3. When an emergency opening of the car door is required, the rotating lever can be pulled out of the mounting frame, and then the rotating lever can be rotated to drive the second guide wheel to rotate, thereby winding up the steel wire. This allows the other end of the steel wire to pull the sliding mounting plate, thereby separating the two L-shaped connecting rods and releasing the lock cylinder of the car door from its restraint. At this time, the car door can be opened quickly. The operation is simple and quick. When not in use, the rotating lever is placed in the mounting frame, eliminating the risk of accidental activation. It is both aesthetically pleasing and highly safe.

[0022] 4. In cases where the car door is deformed and cannot be opened, this invention allows for easy opening by continuously controlling the rotating lever to pull the sliding mounting plate outward. This, in turn, pushes the trapezoidal slider towards the elastic push rods via the outward push linkage. The trapezoidal slider then pushes the elastic push rods outward toward the mounting frame, thereby pushing the car door outward from the mounting frame. This not only facilitates quick unlocking of the car door but also allows for pushing the door outward even when it is deformed, further increasing the probability of escape. Furthermore, the unlocking and force-opening operations are identical, eliminating the need for cumbersome procedures and greatly reducing the difficulty of escape for the user. This invention has significant practical application value. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a structural schematic diagram of the present invention from a rear view.

[0025] Figure 3 This is a schematic diagram of the mounting frame in this invention.

[0026] Figure 4 This is a schematic diagram of the structure of the mounting frame from the rear view in this invention.

[0027] Figure 5 This is the right view of the present invention.

[0028] Figure 6 This is a schematic diagram of the connection structure of the bidirectional retractable frame, the detachable and splicable hook, and the rotating lever in this invention.

[0029] Figure 7 This is a schematic diagram of the rotating lever component in this invention.

[0030] Figure 8 This is a schematic diagram of the connection structure between the separable splicing hook and the trapezoidal slider in this invention.

[0031] Figure 9 This is a schematic diagram of the elastic push rod in this invention.

[0032] Explanation of reference numerals in the attached diagram: 1. Mounting frame; 101. Strip-shaped storage slot; 102. Circular through hole; 103. Square through slot; 104. Lock cylinder slot; 105. Strip-shaped sliding groove; 2. Two-way folding frame; 201. Limiting strip; 202. Connecting center column; 203. Sliding groove; 3. Folding spring; 4. Separable and modular hook; 401. Sliding mounting plate; 402. L-shaped connecting rod; 403. Guide. 5. Steel wire; 6. First guide wheel; 7. Second guide wheel; 8. Rotating lever; 9. Strip handle; 10. Telescopic sleeve rod; 11. Snap groove; 12. Side slot; 13. Rotating handle; 14. Outward push linkage; 15. Trapezoidal slider; 16. Sliding clip; 17. Elastic push rod; 18. Movable rod; 19. Conical top block; 10. Extension plate; 10. Elastic push rod. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings:

[0034] like Figures 1-9 As shown.

[0035] Example 1

[0036] This embodiment provides an emergency vehicle door opening mechanism, including a U-shaped mounting frame 1 placed on the B-pillar of a car. A two-way retractable frame 2 is fixedly installed inside the mounting frame 1. Two detachable splicing hooks 4 are longitudinally installed inside the two-way retractable frame 2. Two retractable springs 3 are also installed inside the two-way retractable frame 2. The two retractable springs 3 are respectively connected to the upper and lower detachable splicing hooks 4. Under normal conditions, the two detachable splicing hooks 4 are kept in a closed state under the pull of the retractable springs 3, which is used to cooperate with the door lock cylinder for locking control. After the two detachable splicing hooks 4 are closed, they can form a traditional U-shaped structure. There is no need to modify the existing door lock structure. The mounting frame 1 of this application can be used simply by fixing it to the existing B-pillar of the vehicle body with screws. The modification to the vehicle is minimal and the applicability is strong.

[0037] The detachable splicing hook 4 consists of a sliding mounting plate 401 and an L-shaped connecting rod 402 that are slidably set in the bidirectional retractable frame 2. The L-shaped connecting rod is fixedly set on the sliding mounting plate 401. The L-shaped connecting rods 402 of the upper and lower detachable splicing hooks 4 are spliced ​​together to form a U-shaped buckle, which is used to engage the door lock cylinder. The splicing hook structure design means that when the vehicle encounters an unexpected situation and the door needs to be opened, it is not necessary to control the door lock. Only the separation of the two L-shaped connecting rods 402 is required to separate the detachable splicing hook 4 from the lock cylinder, thereby achieving quick unlocking.

[0038] The mounting frame 1 has two first guide wheels 5 positioned above and below the bidirectional retracting frame 2, respectively. A second guide wheel 6 is rotatably mounted at the center of the inner side wall of the mounting frame 1. A guide wire 403 is fixed on the side wall of the sliding mounting plate 401. The guide wire 403 passes around the first guide wheel 5 and is fixedly connected to the second guide wheel 6. A rotating lever 7 for controlling the rotation of the second guide wheel 6 is rotatably mounted inside the mounting frame 1. In actual application of the structure of this invention, when it is necessary to open the car door in an emergency, simply pull the rotating lever 7 out of the mounting frame 1, and then rotate the rotating lever 7 to drive the second guide wheel 6 to rotate, thereby winding up the wire. This allows the other end of the wire to pull the sliding mounting plate 401, thereby separating the two L-shaped connecting rods 402 and releasing the lock cylinder of the car door from its restraint. At this time, the car door can be opened quickly, and the operation is simple and quick.

[0039] Specifically, such as Figure 6 As shown, the bidirectional retractable frame 2 consists of two limiting strips 201 respectively set on both sides of the inner wall of the mounting frame 1 and a connecting column 202 for connecting the two limiting strips 201. One end of the retractable spring 3 is fixed on the connecting column 202, and the other end is connected to the sliding mounting plate 401. The bidirectional retractable frame 2 has an overall H-shaped structure. The limiting strips 201 on both sides provide sliding space for the sliding mounting plate 401. The retractable spring 3 is located in the middle position and can apply a relatively stable pulling force to the sliding mounting plate 401, so that the L-shaped connecting rods 402 on the two sliding mounting plates 401 remain in a combined state. Sliding grooves 203 are provided on the side walls facing each other of the two limiting strips 201. Strip-shaped protrusions that can slide into the sliding grooves 203 are provided on both side walls of the sliding mounting plate 401, so that the sliding mounting plate 401 and the limiting strips 201 have a relatively stable connection structure and will not wobble, thereby ensuring the alignment and stability of the two L-shaped connecting rods 402.

[0040] Specifically, such as Figure 7As shown, the rotating lever 7 includes a strip handle 701 and a telescopic rod 702 fixedly mounted on the strip handle 701. The telescopic rod 702 passes through the mounting frame 1 and is connected to the second guide wheel 6. The telescopic rod 702 is a telescopic rod in which the inner and outer rods cannot rotate relative to each other. After the telescopic rod 702 extends, the strip handle 701 can disengage from the strip-shaped storage groove 101 of the mounting frame 1. Then, the rotation of the strip handle 701 can drive the telescopic rod 702 to rotate as a whole, thereby driving the second guide wheel 6 to rotate. This causes the second guide wheel 6 to simultaneously wind up the upper and lower steel wires, thereby pulling the upper and lower sliding mounting plates 401 together with the L-shaped connecting rods 402, causing the two L-shaped connecting rods 402 to separate, realizing the quick door unlocking and opening function. The top and bottom sides of the strip handle 701 are both opened with The strip handle 701, along with the retractable sleeve 702, is secured with both hands to pull it out of the mounting frame 1. This facilitates manual removal of the strip handle 701 from the mounting frame 1. When not in use, the strip handle 701 is placed in the strip-shaped storage slot 101 of the mounting frame 1, without any protrusions, which is aesthetically pleasing and prevents accidental contact, thus enhancing safety. Both sides of the strip handle 701 are provided with side opening slots 704, and rotating handles 705 are rotatably installed in the side opening slots 704. The two rotating handles 705 can be magnetically connected when rotated to a horizontal position. A baffle is provided in the middle of the side opening slots 704 to limit the rotation angle of the rotating handles 705 to within 90 degrees. The two rotating handles 705 can also be rotated out during use, forming a cross structure with the strip handle 701, which makes it easier to rotate and operate in narrow spaces inside the vehicle.

[0041] Specifically, such as Figure 3 As shown, a strip-shaped storage groove 101 for inserting a strip-shaped handle 701 is provided on the outer side wall of the mounting frame 1. A circular through hole 102 is provided in the strip-shaped storage groove 101 for the telescopic sleeve 702 to pass through. A lock cylinder inlet groove 104 for the door lock cylinder to enter and connect with the detachable splicing hook 4 is provided on one side of the mounting frame 1.

[0042] Example 2

[0043] This embodiment adds a collaboratively detachable hook 4 separation structure for forcibly opening the car door, based on embodiment 1. See details for further information. Figure 4 , Figure 5 as well as Figure 8 The inner wall of the mounting frame 1 is provided with a strip groove 105, and a trapezoidal slider 9 is slidably arranged in the strip groove 105. The side wall of the trapezoidal slider 9 is provided with a sliding retainer 901 for engaging with the strip groove 105. The side wall of the trapezoidal slider 9 is fixedly connected to the detachable splicing hook 4 through the outward push link 8. When the two detachable splicing hooks 4 move, the trapezoidal slider 9 can be moved synchronously by the outward push link 8.

[0044] Specifically, such as Figure 5 and Figure 8 As shown, the inner wall of the mounting frame 1 is also provided with an elastic push rod 10 that can be pushed out of the mounting frame 1 by the trapezoidal slider 9. The mounting frame 1 is provided with a square through slot 103 for the elastic push rod 10 to pass through. When the car door encounters an unexpected situation and needs to be opened manually, it can be unlocked by rotating the lever 7. In addition, if the car door is deformed, it may still be impossible to open even if the lock cylinder is separated from the detachable splicing hook 4. At this time, it is only necessary to continuously control the rotation of the lever 7 to continuously pull the sliding mounting plate 401 outward, and it can be opened by pushing the lever outward. Rod 8 pushes trapezoidal slider 9 toward each elastic push rod 10, causing trapezoidal slider 9 to push each elastic push rod 10 toward the outside of mounting frame 1, thereby pushing the car door that is attached to the outside of mounting frame 1 out. Compared with the existing emergency unlocking method of car door, the structure of the present invention not only facilitates quick opening of the car door lock, but also pushes the car door outward even when the car door is deformed, further improving the probability of escape. Moreover, the operation end for unlocking and forcibly opening the door is the same, without cumbersome operation, greatly reducing the difficulty of escape for users, and has great practical application significance.

[0045] Specifically, such as Figure 9 As shown, the elastic push rod 10 consists of a movable rod 1001 that can pass through a square through slot 103, an extension piece 1003 fixedly disposed on one side of the movable rod 1001, and an elastic push rod 1004 fixed to the inner wall of the mounting frame 1. The telescopic end of the elastic push rod 1004 is fixedly connected to the extension piece 1003. Under normal conditions, the elastic push rod 1004 pushes out the extension piece 1003 and the movable rod 1001, so that the movable rod 1001 is inside the mounting frame 1. A tapered top block 1002 is provided at one end of the square through slot 103. Under the control of the elastic push rod 1004, when the trapezoidal slider 9 does not apply pressure to the elastic push rod 10, the elastic push rod 1004 pushes the movable rod 1001 into the mounting frame 1, so that it is not exposed. When pushed by the trapezoidal slider 9, the elastic push rod 1004 is compressed, and the movable rod 1001 can push the tapered top block 1002 outward, thereby pushing out the door that is attached to the outer wall of the mounting frame 1.

[0046] The foregoing has shown and described the basic principles, main features and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from the spirit and scope of this invention. All such changes and modifications fall within the scope of this invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An emergency vehicle door opening mechanism, comprising a U-shaped mounting frame (1) placed on the B-pillar of a vehicle, characterized in that: The mounting frame (1) is fixedly provided with a two-way retractable frame (2). Two detachable splicing hooks (4) are installed longitudinally inside the two-way retractable frame (2). Two retractable springs (3) are also provided inside the two-way retractable frame (2). The two retractable springs (3) are respectively connected to the upper and lower detachable splicing hooks (4). Under normal conditions, the two detachable splicing hooks (4) are kept in a combined state to cooperate with the door lock cylinder for locking control. The separable splicing hook (4) is composed of a sliding mounting plate (401) and an L-shaped connecting rod (402) that are slidably set in the bidirectional retracting frame (2). The L-shaped connecting rod is fixedly set on the sliding mounting plate (401). The L-shaped connecting rods of the upper and lower separable splicing hooks (4) are spliced ​​together to form a U-shaped buckle, which is used to fasten the door lock cylinder. The mounting frame (1) is provided with two first guide wheels (5) located above and below the bidirectional retracting frame (2). A second guide wheel (6) is rotatably mounted at the center of the inner side wall of the mounting frame (1). A guide wire (403) is fixed on the side wall of the sliding mounting plate (401). The guide wire (403) passes around the first guide wheel (5) and is fixedly connected to the second guide wheel (6). A rotating lever (7) for controlling the rotation of the second guide wheel (6) is rotatably mounted in the mounting frame (1).

2. The emergency door opening mechanism according to claim 1, characterized in that: The bidirectional retractable frame (2) consists of two limiting strips (201) respectively set on both sides of the inner wall of the mounting frame (1) and a connecting column (202) for connecting the two limiting strips (201). One end of the retractable spring (3) is fixed on the connecting column (202), and the other end is connected to the sliding mounting plate (401).

3. The emergency door opening mechanism according to claim 2, characterized in that: The two limiting strips (201) are provided with sliding grooves (203) on their facing sidewalls, and the sliding mounting plate (401) is provided with strip-shaped protrusions on both sidewalls for sliding into the sliding grooves (203).

4. The emergency door opening mechanism according to claim 1, characterized in that: The rotating lever (7) includes a bar handle (701) and a telescopic sleeve (702) fixedly mounted on the bar handle (701). The telescopic sleeve (702) passes through the mounting frame (1) and is connected to the second guide wheel (6).

5. The emergency door opening mechanism according to claim 4, characterized in that: The top and bottom sides of the strip handle (701) are provided with a buckle groove (703) for using both hands to buckle and pull the strip handle (701) together with the telescopic sleeve (702) out of the mounting frame (1).

6. The emergency door opening mechanism according to claim 5, characterized in that: Both sides of the strip handle (701) are provided with side slots (704), and a rotating handle (705) is rotatably installed in the side slot (704). The two rotating handles (705) can be magnetically connected after being rotated to a horizontal position. A baffle plate is provided in the middle of the side slot (704) to limit the rotation angle of the rotating handle (705) to within 90 degrees.

7. The emergency door opening mechanism according to claim 6, characterized in that: The outer side wall of the mounting frame (1) is provided with a strip-shaped storage groove (101) for inserting the strip handle (701). A circular through hole (102) is provided in the strip-shaped storage groove (101) for the telescopic sleeve (702) to pass through. One side of the mounting frame (1) is provided with a lock cylinder inlet groove (104) for the door lock cylinder to enter and connect with the detachable splicing hook (4).

8. The emergency door opening mechanism according to claim 7, characterized in that: The inner wall of the mounting frame (1) is provided with a strip groove (105), and a trapezoidal slider (9) is slidably arranged in the strip groove (105). The side wall of the trapezoidal slider (9) is provided with a sliding clip (901) for engaging the strip groove (105). The side wall of the trapezoidal slider (9) is fixedly connected to the detachable splicing hook (4) through an outward push rod (8). When the two detachable splicing hooks (4) move, the trapezoidal slider (9) can be carried to move synchronously through the outward push rod (8).

9. The emergency door opening mechanism according to claim 8, characterized in that: The inner sidewall of the mounting frame (1) is also provided with an elastic push rod (10) that can be pushed out of the mounting frame (1) by the trapezoidal slider (9), and the mounting frame (1) is provided with a square through slot (103) for the elastic push rod (10) to pass through.

10. The emergency door opening mechanism according to claim 9, characterized in that: The elastic push rod (10) consists of a movable rod (1001) that can pass through a square through slot (103), an extension piece (1003) fixedly disposed on one side of the movable rod (1001), and an elastic push rod (1004) fixed on the inner wall of the mounting frame (1). The telescopic end of the elastic push rod (1004) is fixedly connected to the extension piece (1003). Under normal conditions, the elastic push rod (1004) pushes out the extension piece (1003) and the movable rod (1001), so that the movable rod (1001) is inside the mounting frame (1). A conical top block (1002) is provided at one end of the movable rod (1001) facing the square through slot (103).

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