Elevator safety alarm device

Abstract

The present invention provides an elevator safety alarm device, which belongs to the technical field of elevators; it includes an elevator car and a left door and a right door installed at the opening of the elevator car, the left door and the right door are both fixed with frames, an audible and visual alarm is installed in the elevator car, and it also includes: a shell, the number of the shells is two, the two shells are respectively arranged on the side of the left door and the right door away from the elevator car, and the two shells are both provided with a detection component and a driving component. The driving component, the detection component and the audible and visual alarm of the present invention, when there is transparent glass between the left door and the right door, the contact sensor is triggered under the reaction force applied by the transparent glass, and then the left door and the right door can be opened, and when a rope-like object is detected, the driving component drives the infrared transmitter and the infrared receiver to descend at the same time, and the rope-like object in the blind spot can be detected, and then the left door and the right door are opened, so as to realize the safe operation of the elevator.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to an elevator safety alarm device. Background Art

[0002] An elevator is a vertical transportation device, mainly used to transport people and goods conveniently within or between buildings. The elevator is composed of a car, motor, rope, pulley system, guide rail, control system and safety devices, among which the safety devices include brakes, overspeed protection and door locks. There are also sound and light alarms installed inside the elevator. When the infrared transmitter and infrared receiver on the elevator door detect that there is a foreign object between the doors, the elevator door cannot be closed, and the sound and light alarm will sound an alarm to indicate that there is a foreign object between the elevator doors.

[0003] After searching, the Chinese utility model patent with authorization announcement number CN220485034U discloses an elevator anti-pinch alarm component, including an elevator car, a first installation groove is opened at the upper end of the front side surface of the elevator car, a door opening component is arranged on the inner side surface of the first installation groove, the door opening component is connected with a first elevator door and a second elevator door, anti-pinch components are arranged on the opposite sides of the first elevator door and the second elevator door, a second installation groove is opened on the bottom surface of the first elevator door and the second elevator door, pulleys are rotatably connected at both ends of the second installation groove, a slide rail is connected to the bottom end of the front side surface of the elevator car by bolts, an alarm component is arranged on the upper end of the left side wall of the elevator car, and a controller is connected to the middle of the left side wall of the elevator car by bolts.

[0004] In the above patent, an alarm component and an anti-pinch component are set to prevent foreign objects from being present between the elevator doors. However, the infrared transmitter and the infrared receiver in the anti-pinch component emit laser beams, and there is a blind spot between the laser beams. If it is a rope-like object, if the rope-like object is relatively thin, the rope-like object is easily located in the blind spot of the laser beam. If there is transparent glass between the elevator doors, the laser beam can pass through the transparent glass. Both of them can cause the anti-pinch component to lose its function, resulting in failure to detect foreign objects between the elevator doors. If foreign objects between the elevator doors are not detected, the elevator will be damaged during its travel, and serious safety accidents may occur. Therefore, the present application provides an elevator safety alarm device to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an elevator safety alarm device to solve the problem that when transparent glass or rope-like objects are present between elevator doors, the anti-pinch component loses its function, causing the elevator to be prone to safety accidents.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] An elevator safety alarm device comprises an elevator car and a left door and a right door installed at the opening of the elevator car, a frame is fixed on the left door and the right door, an audible and visual alarm is installed in the elevator car, and further comprises:

[0008] Shell, the number of the shells is two, the two shells are respectively arranged on the side of the left door and the right door away from the elevator car, the two shells are provided with detection components and drive components, the opposite surfaces of the two shells are provided with a plurality of installation openings, the detection components include an infrared transmitter, an infrared receiver and a contact sensor, the infrared transmitter is arranged on the shell of the right door, the infrared receiver is arranged on the shell of the left door, and the contact sensor, the infrared transmitter and the infrared receiver are all electrically connected to the sound and light alarm;

[0009] During the closing process of the left door and the right door, the driving assembly contacts the transparent glass and triggers the contact sensor under the reaction force exerted by the transparent glass, so that the left door and the right door open;

[0010] After the left door and the right door are closed, the driving assembly drives the infrared transmitter and the infrared receiver to descend simultaneously, and detects the blind areas of the infrared transmitter and the infrared receiver. When the rope-like object is detected, the left door and the right door are opened.

[0011] Preferably, the driving assembly includes a plurality of lower inclined plates and a plurality of fixed blocks which are arranged in the installation opening and distributed at intervals, the lower inclined plate is rotatably connected to the bottom of the installation opening, the movable end of the lower inclined plate is rotatably connected to the upper inclined plate, a spring is connected between the lower inclined plate and the upper inclined plate, a block is arranged at the top of the upper inclined plate, the block is slidably connected in the shell, the contact sensor is fixed in the shell, the contact sensor is located above the corresponding block, a slot is provided on the side of the fixed block, the lower inclined plate and the fixed block on the shell are arranged correspondingly, the slot is composed of a lower inclined portion, a recessed portion and an upper inclined portion, the inclination angle of the upper inclined portion is smaller than the inclination angle of the corresponding upper inclined plate, a plurality of through grooves are provided on the side of the shell away from the elevator car, a connecting block is fixed on the side of the block away from the elevator car, the side of the connecting block is movably connected to the inner wall of the through groove, the infrared transmitter and the corresponding block as well as the infrared receiver and the corresponding block are connected through the connecting block.

[0012] Preferably, a slide groove is provided at the bottom of the block, a sliding block is slidably connected to the inner wall of the slide groove, and the bottom of the sliding block is rotatably connected to the top of the upper inclined plate.

[0013] Preferably, an inner spring is fixed between a side of the sliding block close to the frame and an inner wall of the sliding groove.

[0014] Preferably, a protective sleeve is fixedly sleeved on the movable end of the lower inclined plate.

[0015] Preferably, the protective sleeve is a rubber sleeve, and the end of the protective sleeve is arranged as a curved surface.

[0016] Preferably, a support plate is fixed to one side of the two shells away from the elevator car, and an outer spring is fixed to the two support plates. The two outer springs are respectively attached to the bottom of the infrared transmitter and the infrared receiver.

[0017] Preferably, a positioning rod is fixed on the top of the infrared transmitter and the infrared receiver, a positioning plate is movably sleeved on the circumferential surface of the positioning rod, and the positioning plate is fixed on a side of the shell away from the elevator car.

[0018] Preferably, a guide portion is provided at the connection between the upper inclined portion and the fixing block.

[0019] Preferably, an electric push rod is fixed on both frames, the push rod of the electric push rod movably passes through the frame and is fixed to the side of the shell, the electric push rod is used to drive the shell to move, and a guide rod is fixed on the side of the shell close to the frame, and the guide rod movably passes through the frame.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] In the above scheme, by setting a driving component, a detection component and an audible and visual alarm, when there is transparent glass between the left door and the right door, the contact sensor is triggered under the reaction force exerted by the transparent glass, and then the left door and the right door can be opened. When a rope-like object is detected, after the left door and the right door are closed, the driving component drives the infrared transmitter and the infrared receiver to descend at the same time, and detects the blind spots of the infrared transmitter and the infrared receiver. The rope-like object in the blind spot can be detected, and then the left door and the right door are opened, thereby avoiding the transparent glass and the rope-like object from being sandwiched between the left door and the right door, thereby realizing the safe operation of the elevator.

[0022] By setting an electric push rod and a guide rod, when the left door and the right door are opened to the maximum, the electric push rod can drive the shell to retract, thereby retracting the drive assembly. After the drive assembly retracts, the drive assembly will not block the entrance and exit of the elevator car, and the drive assembly will not affect the entry and exit of people, thereby ensuring the convenience of the elevator in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2It is a schematic diagram of the three-dimensional structure of the left door and the right door of the present invention;

[0026] Figure 3 It is a cross-sectional view of the left door and the right door of the present invention;

[0027] Figure 4 For the present invention Figure 3 A magnified view of the structure at center;

[0028] Figure 5 It is a cross-sectional view of the housing of the present invention;

[0029] Figure 6 For the present invention Figure 5 A magnified view of the structure at B in the middle;

[0030] Figure 7 For the present invention Figure 5 A magnified view of the structure at C in the middle;

[0031] Figure 8 For the present invention Figure 5 A magnified view of the structure at D in the middle;

[0032] Fig. 9 It is a schematic diagram of the three-dimensional structure of the lower inclined plate of the present invention;

[0033] Fig.10 It is a schematic diagram of the three-dimensional structure of the fixing block of the present invention.

[0034] [Reference Signs]

[0035] 1. Elevator car; 2. Left door; 3. Right door; 4. Frame; 5. Shell; 6. Electric push rod; 7. Guide rod; 8. Infrared transmitter; 9. Infrared receiver; 10. Drive assembly; 11. Lower inclined plate; 12. Upper inclined plate; 13. Shrapnel; 14. Block; 15. Slide; 16. Slider; 17. Inner spring; 18. Protective cover; 19. Fixed block; 20. Slot; 21. Lower inclined portion; 22. Concave portion; 23. Upper inclined portion; 24. Guide portion; 25. Through groove; 26. Connecting block; 27. Support plate; 28. Outer spring; 29. ​​Positioning plate; 30. Positioning rod; 31. Contact sensor; 32. Sound and light alarm; 33. Detection component.

[0036] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0037] The elevator safety alarm device provided by the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0038] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0039] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0040] like Figure 1-Figure 9 As shown, an embodiment of the present invention provides an elevator safety alarm device, comprising an elevator car 1 and a left door 2 and a right door 3 installed at the opening of the elevator car 1, a drive is provided on the elevator car 1, which can drive the left door 2 and the right door 3 to open or close, an infrared transmitter 8 and an infrared receiver 9 and a detection component 33 are all electrically connected to the drive, a frame 4 is fixed on the left door 2 and the right door 3, an audible and visual alarm 32 is installed in the elevator car 1, and further comprises:

[0041] Shell 5, the number of shells 5 is two, the two shells 5 are respectively arranged on the side of the left door 2 and the right door 3 away from the elevator car 1, the two shells 5 are provided with a detection component 33 and a drive assembly 10, the opposite surfaces of the two shells 5 are provided with a plurality of installation openings, the detection component 33 includes an infrared transmitter 8, an infrared receiver 9 and a contact sensor 31, the infrared transmitter 8 is arranged on the shell 5 of the right door 3, the infrared receiver 9 is arranged on the shell 5 of the left door 2, and the contact sensor 31 and the infrared transmitter 8 and the infrared receiver 9 are all electrically connected to the sound and light alarm 32;

[0042] During the closing process of the left door 2 and the right door 3, the driving assembly 10 contacts the transparent glass and triggers the contact sensor 31 under the reaction force exerted by the transparent glass, so that the left door 2 and the right door 3 are opened;

[0043] After the left door 2 and the right door 3 are closed, the driving assembly 10 drives the infrared transmitter 8 and the infrared receiver 9 to descend simultaneously, and detects the blind areas of the infrared transmitter 8 and the infrared receiver 9. When a rope-like object is detected, the left door 2 and the right door 3 are opened.

[0044] like Figure 1-Figure 10 As shown, in this embodiment, the driving assembly 10 includes a plurality of lower inclined plates 11 and a plurality of fixed blocks 19 which are arranged in the installation opening and distributed at intervals. The lower inclined plate 11 is rotatably connected to the bottom of the installation opening, and the movable end of the lower inclined plate 11 is rotatably connected to the upper inclined plate 12. A spring piece 13 is connected between the lower inclined plate 11 and the upper inclined plate 12. A block 14 is arranged at the top of the upper inclined plate 12, and the block 14 is slidably connected in the shell 5. The contact sensor 31 is fixed in the shell 5, and the contact sensor 31 is located above the corresponding block 14. A slot 20 is provided on the side of the fixed block 19, which is correspondingly arranged on the lower inclined plate 11 and the fixed block 19 on the shell 5. The slot 20 is composed of a lower inclined portion 21, a recessed portion 22 and an upper inclined portion 23. The inclination angle of the upper inclined portion 23 is smaller than the inclination angle of the corresponding upper inclined plate 12. A plurality of through grooves 25 are provided on the side of the shell 5 away from the elevator car 1. The block A connecting block 26 is fixed on the side of 14 away from the elevator car 1, and the side of the connecting block 26 is movably connected to the inner wall of the through groove 25. The infrared transmitter 8 and the corresponding block 14, as well as the infrared receiver 9 and the corresponding block 14 are connected through the connecting block 26. When there is transparent glass between the left door 2 and the right door 3, the contact sensor 31 is triggered under the reaction force exerted by the transparent glass, and then the left door 2 and the right door 3 can be opened. When a rope-like object is detected, after the left door 2 and the right door 3 are closed, the driving component 10 drives the infrared transmitter 8 and the infrared receiver 9 to descend at the same time, and detects the blind areas of the infrared transmitter 8 and the infrared receiver 9, and can detect the rope-like object in the blind area, and then the left door 2 and the right door 3 are opened, thereby avoiding the transparent glass and the rope-like object from being sandwiched between the left door 2 and the right door 3, and realizing the safe operation of the elevator.

[0045] like Fig. 9 As shown, in this embodiment, a slide groove 15 is opened at the bottom of the block 14, and a slider 16 is slidably connected to the inner wall of the slide groove 15. The bottom of the slider 16 is rotatably connected to the top of the upper inclined plate 12. The slider 16 can slide on the inner wall of the slide groove 15, so that the upper inclined plate 12 can slide stably on the bottom of the block 14.

[0046] like Fig. 9As shown, in this embodiment, an inner spring 17 is fixed between the side of the slider 16 close to the frame 4 and the inner wall of the slide groove 15. By providing the inner spring 17, when the slider 16 moves in the direction of the inner spring 17, when the slider 16 needs to be reset, it is not only driven to reset by the upper inclined plate 12, but also driven to reset by the elastic force of the inner spring 17, so that the reset of the slider 16 is more stable.

[0047] like Fig. 9 As shown, in this embodiment, a protective sleeve 18 is fixedly sleeved on the movable end of the lower inclined plate 11. By providing the protective sleeve 18 and contacting the transparent glass through the protective sleeve 18, direct hard contact between the lower inclined plate 11 and the transparent glass is avoided, thereby protecting the transparent glass.

[0048] like Fig. 9 As shown, in this embodiment, the protective sleeve 18 is a rubber sleeve, and the end of the protective sleeve 18 is set as a curved surface. The rubber material is softer, which improves the protection effect on the transparent glass. After the end of the protective sleeve 18 is set as a curved surface, it can prevent the edge position from being stuck in the recessed portion 22.

[0049] like Figure 2 and Figure 7 As shown, in this embodiment, support plates 27 are fixed on the side of the two shells 5 away from the elevator car 1, and external springs 28 are fixed on the two support plates 27. The two external springs 28 are respectively attached to the bottom of the infrared transmitter 8 and the infrared receiver 9. When the infrared transmitter 8 and the infrared receiver 9 move upward, the infrared transmitter 8 and the infrared receiver 9 will not drive the external springs 28 to stretch upward. When the infrared transmitter 8 and the infrared receiver 9 move downward, the infrared transmitter 8 and the infrared receiver 9 can compress the external springs 28. When the infrared transmitter 8 and the infrared receiver 9 are reset, the elastic force of the external springs 28 makes it easier for the infrared transmitter 8 and the infrared receiver 9 to reset.

[0050] like Figure 2 and Figure 6 As shown, in this embodiment, a positioning rod 30 is fixed to the top of the infrared transmitter 8 and the infrared receiver 9, and a positioning plate 29 is movably sleeved on the circumferential surface of the positioning rod 30. The positioning plate 29 is fixed to the side of the shell 5 away from the elevator car 1. The positioning rod 30 can move vertically up and down on the inner wall of the positioning plate 29 to ensure the vertical movement of the infrared transmitter 8 and the infrared receiver 9, making the infrared transmitter 8 and the infrared receiver 9 more stable during the vertical movement.

[0051] like Fig.10As shown, in the present embodiment, a guide portion 24 is provided at the connection between the upper inclined portion 23 and the fixed block 19. By providing the guide portion 24, the guide portion 24 can guide the upper inclined plate 12 to avoid the end of the upper inclined plate 12 directly abutting against the fixed block 19, thereby protecting the upper inclined plate 12 and secondly avoiding stress concentration at the edge position of the opening of the fixed block 19, thereby improving the durability of the fixed block 19 during use.

[0052] like Figure 1-Figure 3 As shown, in this embodiment, electric push rods 6 are fixed on both frames 4, and the push rods of the electric push rods 6 move through the frames 4 and are fixed to the sides of the shells 5. The electric push rods 6 are used to drive the shells 5 to move, and a guide rod 7 is fixed to the side of the shells 5 close to the frames 4, and the guide rod 7 moves through the frames 4. When the left door 2 and the right door 3 are opened to the maximum state, the electric push rods 6 drive the shells 5 to retract, and the shells 5 drive the drive assembly 10 to retract, so that there is no obstruction of the drive assembly 10 at the entrance and exit of the elevator car 1, and the drive assembly 10 is placed in the way. By setting the guide rods 7, the shells 5 are moving, and the shells 5 are guided by the guide rods 7, so that the shells 5 can be more stable during movement, thereby avoiding the shells 5 from tilting.

[0053] Working principle: when there is transparent glass between the left door 2 and the right door 3, the left door 2 and the right door 3 are closed, and the left door 2 and the right door 3 drive the frame 4 to move at the same time, and the frame 4 will drive the shell 5 to move through the electric push rod 6, and the shell 5 will drive the drive assembly 10 to move. When the protective cover 18 on the lower inclined plate 11 contacts the transparent glass, the reaction force provided by the transparent glass will drive the lower inclined plate 11 to rotate upward, and the lower inclined plate 11 will drive the upper inclined plate 12 to rotate, and the upper inclined plate 12 will drive the block 14 to move upward through the slider 16 in the slide groove 15. When the block 14 contacts the contact transmission After the sensor 31 is touched, the contact sensor 31 contacts the block 14, and the contact sensor 31 sends a signal to the information processing unit. The information processing unit controls the left door 2 and the right door 3 to open through the control unit. Then, the information processing unit controls the sound and light alarm 32 to sound an alarm, indicating that there is a foreign object between the left door 2 and the right door 3. When the left door 2 and the right door 3 are opened, there is a foreign object between the left door 2 and the right door 3. After the transparent glass is away from the left door 2 and the right door 3, the spring 13 drives the upper inclined plate 12 to reset, and at the same time, the inner spring 17 drives the slider 16 to reset, and the cooperation with the spring 13 makes the reset of the upper inclined plate 12 more stable.

[0054] When there is a rope-like object between the left door 2 and the right door 3, and the rope-like object is located exactly in the blind spot of the infrared transmitter 8 and the infrared receiver 9, when the left door 2 and the right door 3 are closed, the upper inclined plate 12 contacts the upper inclined portion 23, and the upper inclined plate 12 is squeezed by the upper inclined portion 23, and the upper inclined plate 12 will drive the block 14 to move downward through the slider 16. At this time, the block 14 on the left door 2 will drive the infrared receiver 9 to move downward through the connecting block 26, and the block 14 on the right door 3 will drive the infrared transmitter 8 to move downward through the connecting block 26, and the downward moving distance is the distance between the blind spot of the infrared transmitter 8 and the infrared receiver 9. After the movement, the rope-like object in the blind spot can be detected. After detecting the rope-like object, the left door 2 and the right door 3 are opened, and the sound and light alarm 32 sounds an alarm.

[0055] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An elevator safety alarm device, comprising an elevator car (1) and a left door (2) and a right door (3) installed at the opening of the elevator car (1), wherein a frame (4) is fixed to the left door (2) and the right door (3), and an audible and visual alarm (32) is installed in the elevator car (1), characterized in that: Also includes: A shell (5), wherein the number of the shells (5) is two, and the two shells (5) are respectively arranged on the side of the left door (2) and the right door (3) away from the elevator car (1). The two shells (5) are both provided with a detection component (33) and a drive assembly (10). The two shells (5) are both provided with a plurality of mounting openings on the opposite surfaces of the two shells (5). The detection component (33) comprises an infrared transmitter (8), an infrared receiver (9) and a contact sensor (31). The infrared transmitter (8) is arranged on the shell (5) of the right door (3), and the infrared receiver (9) is arranged on the shell (5) of the left door (2). The contact sensor (31), the infrared transmitter (8) and the infrared receiver (9) are all electrically connected to the sound and light alarm (32); The driving assembly (10) comprises a plurality of lower inclined plates (11) and a plurality of fixed blocks (19) which are arranged in the installation opening and are spaced apart from each other. The lower inclined plate (11) is rotatably connected to the bottom of the installation opening. The movable end of the lower inclined plate (11) is rotatably connected to the upper inclined plate (12). A spring piece (13) is connected between the lower inclined plate (11) and the upper inclined plate (12). A block (14) is arranged at the top of the upper inclined plate (12). The block (14) is slidably connected in the housing (5). A contact sensor (31) is fixed in the housing (5). The contact sensor (31) is located above the corresponding block (14). A slot (20) is provided on the side of the fixed block (19) and is opposite to the upper portion of the housing (5). The lower inclined plate (11) and the fixed block (19) are arranged correspondingly, the slot (20) is composed of a lower inclined portion (21), a recessed portion (22) and an upper inclined portion (23), the inclination angle of the upper inclined portion (23) is smaller than the inclination angle of the corresponding upper inclined plate (12), a shell (5) is provided with a plurality of through slots (25) on the side away from the elevator car (1), a connecting block (26) is fixed on the side away from the elevator car (1) of the block (14), the side of the connecting block (26) is movably connected to the inner wall of the through slot (25), and the infrared transmitter (8) and the corresponding block (14) and the infrared receiver (9) and the corresponding block (14) are connected via the connecting block (26); During the process of closing the left door (2) and the right door (3), the driving assembly (10) contacts the transparent glass and triggers the contact sensor (31) under the reaction force exerted by the transparent glass, so that the left door (2) and the right door (3) open; After the left door (2) and the right door (3) are closed, the driving assembly (10) drives the infrared transmitter (8) and the infrared receiver (9) to descend simultaneously, detects the blind areas of the infrared transmitter (8) and the infrared receiver (9), and when the rope-like object is detected, the left door (2) and the right door (3) are opened.

2. The elevator safety alarm device according to claim 1, characterized in that: A slide groove (15) is provided at the bottom of the block (14), a sliding block (16) is slidably connected to the inner wall of the slide groove (15), and the bottom of the sliding block (16) is rotatably connected to the top of the upper inclined plate (12).

3. The elevator safety alarm device according to claim 2, characterized in that: An inner spring (17) is fixed between a side of the sliding block (16) close to the frame (4) and an inner wall of the sliding groove (15).

4. The elevator safety alarm device according to claim 1, characterized in that: The movable end of the lower inclined plate (11) is fixedly sleeved with a protective sleeve (18).

5. The elevator safety alarm device according to claim 4, characterized in that: The protective sleeve (18) is a rubber sleeve, and the end of the protective sleeve (18) is arranged as a curved surface.

6. The elevator safety alarm device according to claim 1, characterized in that: A support plate (27) is fixed to one side of the two shells (5) away from the elevator car (1), and an outer spring (28) is fixed to each of the two support plates (27). The two outer springs (28) are respectively attached to the bottom of the infrared transmitter (8) and the infrared receiver (9).

7. The elevator safety alarm device according to claim 1, characterized in that: A positioning rod (30) is fixed on the top of each of the infrared transmitter (8) and the infrared receiver (9), a positioning plate (29) is movably sleeved on the circumferential surface of the positioning rod (30), and the positioning plate (29) is fixed on a side of the housing (5) away from the elevator car (1).

8. The elevator safety alarm device according to claim 1, characterized in that: A guide portion (24) is provided at the connection between the upper inclined portion (23) and the fixed block (19).

9. The elevator safety alarm device according to claim 1, characterized in that: An electric push rod (6) is fixed on each of the two frames (4). The push rod of the electric push rod (6) movably passes through the frame (4) and is fixed to the side of the shell (5). The electric push rod (6) is used to drive the shell (5) to move. A guide rod (7) is fixed on the side of the shell (5) close to the frame (4). The guide rod (7) movably passes through the frame (4).

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