Limit switch device for elevator

Abstract

The utility model provides a limit switch device for an elevator, which relates to the technical field of limit switches and comprises an elevator car, a mounting box is mounted at the bottom of the elevator car, a pressure plate and a pressure sensor are mounted at the inner bottom of the elevator car, and the pressure sensor is positioned at the bottom of the pressure plate; a switch structure is further arranged on the inner wall of the elevator car, and the switch structure comprises a shell, a button arranged in the shell and a mistaken touch prevention component for protecting the button; through the arrangement of the mistaken touch prevention component, not only can quick and timely alarm be realized, but also the operation is simple, the time for waiting for rescue of elevator passengers can be shortened, the risk is reduced, the safe taking of the elevator is facilitated, the collision rod can be limited and fixed, the effective protection on the button is ensured, and the safety of the elevator is improved. And elevator passengers can be further prevented from touching the switch device by mistake, and the problem that normal operation of the elevator is affected due to false alarm caused by the fact that the abutting rod abuts against the button when the elevator passengers touch the pressing block by mistake is solved.

Description

Technical Field

[0001] This utility model relates to the field of limit switch technology, and in particular to a limit switch device for elevators. Background Technology

[0002] An elevator is a permanent transportation device that serves several specific floors within a building, with its car moving along at least two rigid tracks perpendicular to the horizontal plane or at an angle of less than 15° to the vertical. It mainly consists of a traction system, a guiding system, a car, a door system, a weight balancing system, an electrical control system, and a safety protection system. The speed controller, serving as a safety device in the elevator, has limit switches. These limit switches are typically connected in the motor's power supply path. When the elevator car's speed within the elevator shaft exceeds a set speed, the speed controller activates the limit switch, disconnecting the power supply to the motor. Existing elevator limit switches are usually large and complex in structure, making them cumbersome to use in the confined spaces of older buildings. Furthermore, limit switches are often paired with an emergency alarm button installed inside the elevator car, which typically lacks external protection.

[0003] Although existing patent documents, such as application number 202022347504.4, disclose an elevator limit switch device, including an elevator car, a mounting box, and a button, with the mounting box fixedly installed below the elevator car, the button installed on the left side of the inner wall of the elevator car, a pressure plate embedded in the bottom of the elevator car interior, a pressure sensor installed on the bottom surface of the inner wall of the elevator car with its upper end in contact with the bottom surface of the pressure plate, a battery and a control box installed on the bottom surface of the mounting box interior, a horn installed on the right side of the mounting box, and a mounting plate and a housing on the outside of the button, with the left side of the mounting plate in contact with the right side of the inner wall of the elevator car, the left side of the outer wall of the housing fixedly connected to the right side of the mounting plate, and a cover plate hinged to the rear right side of the housing; the advantages of this utility model are: a relatively simple structure, convenient use, and effective prevention of users accidentally touching the emergency alarm button and affecting the normal operation of the elevator. However, when the limit switch device used in the elevator is activated in an emergency, passengers usually need to flip the cover on the outer shell and then put their fingers into the shell to press the button to trigger the alarm. Therefore, the alarm operation is cumbersome and often makes it inconvenient for passengers to quickly and timely report the alarm. In addition, passengers have to wait for a long time, which increases the risk and is detrimental to the safe use of the elevator. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a limit switch device for elevators.

[0005] The technical solution of this utility model is implemented as follows:

[0006] An elevator limit switch device includes an elevator car, an installation box is installed at the bottom of the elevator car, and a pressure plate and a pressure sensor are installed at the bottom of the interior of the elevator car, with the pressure sensor located at the bottom of the pressure plate.

[0007] The inner wall of the elevator car is also equipped with a switch structure, which includes a housing, a button inside the housing, and a component to protect the button from accidental touch.

[0008] The anti-accidental touch component includes a protective shell installed on one side of the outer shell. A pressing block is provided on one side of the protective shell, and an abutment rod that can move along the inside of the protective shell and reset is installed on one side of the pressing block. One end of the abutment rod extends into the outer shell and contacts the button. A limiting member is also provided on the outer shell to limit the position of the abutment rod.

[0009] Preferably, the limiting member includes a limiting plate, the outer shell has an opening for the limiting plate to be inserted, one end of the limiting plate has an arc groove that fits with the abutment rod, and a limiting block is installed in the arc groove, and the abutment rod has a limiting groove for the limiting block to be inserted.

[0010] Preferably, a fixed plate is installed inside the protective shell, a movable plate is installed at one end of the abutment rod near the pressing block, and a first spring is connected between the movable plate and the fixed plate, the first spring being sleeved on the outside of the abutment rod.

[0011] Further preferably, a quick-release connection structure is provided between the protective shell and the outer shell. The connection structure includes multiple connecting rods installed on one side of the protective shell and multiple connecting holes opened on one side of the outer shell. The multiple connecting rods correspond one-to-one with the multiple connecting holes, and each of the multiple connecting rods has an elastic element inside. Both sides of the elastic element are connected to a locking block that can extend to the outside of the connecting rod. The inner wall of the connecting hole has a locking hole that cooperates with the locking block.

[0012] More preferably, the elastic element includes a cavity formed inside the connecting rod, a second spring is provided in the cavity, and both ends of the second spring are connected to a connecting plate that can move along the cavity. The locking block is installed on the side of the connecting plate away from the second spring.

[0013] Most preferably, a guide strip is installed on the inner wall of the connecting hole, and a guide groove that cooperates with the guide strip is opened on the outer wall of the connecting rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When in use, this utility model, through the setting of the anti-accidental touch component, can not only achieve fast and timely alarm, but also be simple to operate, shorten the waiting time for rescue for elevator passengers, reduce the risk, and promote safe elevator rides. It can also limit and fix the contact rod to ensure effective protection of the button, further preventing elevator passengers from accidentally touching the switch device, avoiding the problem of elevator passengers accidentally touching the pressing block and causing the contact rod to press the button, resulting in a false alarm and affecting the normal operation of the elevator.

[0016] 2. In use, the connection structure of this utility model enables the installation between the protective shell and the outer shell, thereby facilitating the quick disassembly and assembly of the anti-accidental touch component. This makes it convenient to replace the anti-accidental touch component, which in turn helps to ensure the protective effect of the anti-accidental touch component on the button, preventing passengers from accidentally touching the button and ensuring the smooth and safe operation of the elevator. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0020] Figure 3 This is a partial cross-sectional view of the present invention;

[0021] Figure 4 This is an exploded view of the switch structure.

[0022] Figure 5 This is a schematic diagram of the protective shell structure;

[0023] Figure 6 This is a partial sectional view of the outer casing;

[0024] Figure 7 for Figure 5 A partial sectional view;

[0025] Figure 8 This is a partial sectional view of the connecting rod.

[0026] In the diagram: 1. Elevator car; 2. Pressure plate; 3. Switch structure; 31. Housing; 32. Button; 33. Protective housing; 34. Pressing block; 35. Connecting rod; 36. Connecting hole; 37. Limiting plate; 38. Limiting block; 39. Through port; 310. Contact rod; 311. Limiting groove; 312. Fixing plate; 313. Movable plate; 314. First spring; 315. Locking block; 316. Second spring; 317. Connecting plate; 4. Mounting box; 5. Pressure sensor. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This utility model provides, for example Figures 1-7 The elevator limit switch device shown includes an elevator car 1, an installation box 4 installed at the bottom of the elevator car 1, and a pressure plate 2 and a pressure sensor 5 installed at the bottom of the interior of the elevator car 1. The pressure sensor 5 is located at the bottom of the pressure plate 2. An alarm horn (not shown in the figure) can also be installed on the inner wall of the elevator car 1. The installation box 4 contains a battery and a control box (not shown in the figure). The control box is electrically connected to the battery. The pressure sensor 5, the button 32 and the horn are all electrically connected to the control box.

[0029] The inner wall of the elevator car 1 is also provided with a switch structure 3, and the switch structure 3 includes a housing 31, a button 32 disposed in the housing 31, and an anti-accidental contact component that protects the button 32.

[0030] The anti-accidental touch component includes a protective shell 33 installed on one side of the outer shell 31. A pressing block 34 is provided on one side of the protective shell 33, and an abutment rod 310 that can move along the inside of the protective shell 33 and reset is installed on one side of the pressing block 34. One end of the abutment rod 310 extends into the outer shell 31 and contacts the button 32. A limiting member is also provided on the outer shell 31 to limit the abutment rod 310.

[0031] Specifically, the limiting component includes a limiting plate 37, and the outer shell 31 has an opening 39 for the limiting plate 37 to be inserted. One end of the limiting plate 37 has an arc groove that fits against the abutment rod 310, and a limiting block 38 is installed in the arc groove. The abutment rod 310 has a limiting groove 311 for the limiting block 38 to be inserted.

[0032] Meanwhile, in this embodiment, regarding how the aforementioned abutment rod 310 moves and resets within the protective shell 33, as follows: Figure 7As shown, a fixed plate 312 is installed inside the protective shell 33, and a movable plate 313 is installed at one end of the abutment rod 310 near the pressing block 34. A first spring 314 is connected between the movable plate 313 and the fixed plate 312, and the first spring 314 is sleeved on the outside of the abutment rod 310.

[0033] As described above, when passengers enter elevator car 1 and ride the elevator, they step on pressure plate 2. Pressure plate 2 then transmits pressure to pressure sensor 5. When pressure sensor 5 detects that the pressure exceeds the preset limit pressure, the control box will control the horn to sound an alarm, reminding passengers in elevator car 1 to automatically exit, so as to reduce the weight in elevator car 1. In addition, when the elevator malfunctions, passengers can press button 32 to sound an emergency alarm, which facilitates rapid rescue by external rescue personnel.

[0034] During the use of the switch device, the protective shell 33 can protect the button 32, preventing accidental activation by passengers and preventing collisions with the button 32 when passengers are moving items, thus ensuring the normal use of the button 32. When passengers need to trigger an alarm, they only need to pull out the limit plate 37 from the opening 39, so that the limit block 38 moves out of the limit groove 311, and then press the pressing block 34, so that the pressing block 34 drives the contact rod 310 to move. Then the contact rod 310 presses the button 32 to activate the button 32. After the button is activated, the passenger releases the pressing block 34, and the contact rod 310 resets under the action of the first spring 314, so that the contact rod 310 releases the button 32, thereby realizing the alarm operation.

[0035] Secondly, after the alarm is triggered, the limiting plate 37 can be inserted back into the housing 31 through the through port 39, so that the limiting block 38 is inserted into the limiting groove 311 to limit and fix the abutment rod 310. This prevents passengers from accidentally touching the pressing block 34 and causing the abutment rod 310 to press the button 32 and trigger a false alarm. This ensures effective protection of the button 32 and further prevents passengers from accidentally touching the switch device, ensuring the normal use of the switch device.

[0036] Additionally, in one embodiment, such as Figures 4-8 As shown, a quick-release connection structure is also provided between the protective shell 33 and the outer shell 31. The connection structure includes multiple connecting rods 35 installed on one side of the protective shell 33 and multiple connecting holes 36 opened on one side of the outer shell 31. The multiple connecting rods 35 correspond one-to-one with the multiple connecting holes 36, and each of the multiple connecting rods 35 has an elastic element inside. Both sides of the elastic element are connected to a locking block 315 that can extend to the outside of the connecting rod 35. The inner wall of the connecting hole 36 is provided with a locking hole that cooperates with the locking block 315.

[0037] Specifically, the elastic element includes a cavity formed inside the connecting rod 35, a second spring 316 is provided in the cavity, and both ends of the second spring 316 are connected to a connecting plate 317 that can move along the cavity. The locking block 315 is installed on the side of the connecting plate 317 away from the second spring 316.

[0038] When the anti-accidental touch component needs to be disassembled, the protective shell 33 can be pulled outward, causing the connecting rod 35 to move from the connecting hole 36. At this time, the locking block 315 is squeezed and compresses the second spring 316 until the connecting rod 35 moves out of the connecting hole 36. The locking block 315 pops out under the action of the second spring 316, thereby achieving the disassembly between the protective shell 33 and the outer shell 31. When the button 32 needs to be protected, the protective shell 33 and the outer shell 31 are inserted through the cooperation of the connecting rod 35 and the connecting hole 36. At this time, the locking block 315 is locked into the locking hole under the action of the second spring 316 to lock and fix the connecting rod 35, thereby achieving the installation between the protective shell 33 and the outer shell 31. This enables the quick disassembly and assembly of the anti-accidental touch component, facilitates the replacement of the anti-accidental touch component, and helps to ensure the protective effect of the anti-accidental touch component on the button 32, preventing passengers from accidentally touching the button 32 and ensuring the smooth and safe operation of the elevator.

[0039] Furthermore, to facilitate the quick and stable insertion of the connecting rod 35 into the connecting hole 36, such as... Figures 5-8 As shown, a guide strip is also installed on the inner wall of the connecting hole 36, and a guide groove that cooperates with the guide strip is provided on the outer wall of the connecting rod 35.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A position-limiting switch device for an elevator, characterized by: The elevator includes an elevator car (1), a mounting box (4) is installed at the bottom of the elevator car (1), and a pressure plate (2) and a pressure sensor (5) are installed at the bottom of the interior of the elevator car (1), with the pressure sensor (5) located at the bottom of the pressure plate (2). The inner wall of the elevator car (1) is also provided with a switch structure (3), and the switch structure (3) includes a housing (31), a button (32) provided in the housing (31), and an anti-accidental touch component to protect the button (32); The anti-accidental touch component includes a protective shell (33) installed on one side of the outer shell (31). A pressing block (34) is provided on one side of the protective shell (33), and an abutment rod (310) that can move and reset inside the protective shell (33) is installed on one side of the pressing block (34). One end of the abutment rod (310) extends into the outer shell (31) and contacts the button (32). A limiting member is also provided on the outer shell (31) to limit the abutment rod (310).

2. The limit switch device for an elevator according to claim 1, characterized by: The limiting component includes a limiting plate (37), and the outer shell (31) has an opening (39) for the limiting plate (37) to be inserted into. One end of the limiting plate (37) has an arc groove that fits against the abutting rod (310), and a limiting block (38) is installed in the arc groove. The abutting rod (310) has a limiting groove (311) for the limiting block (38) to be inserted into.

3. The limit switch device for an elevator according to claim 1, characterized by: The protective shell (33) has a fixed plate (312) installed inside. The abutment rod (310) has a movable plate (313) installed at one end near the pressing block (34). A first spring (314) is connected between the movable plate (313) and the fixed plate (312). The first spring (314) is sleeved on the outside of the abutment rod (310).

4. The limit switch device for an elevator according to claim 1, characterized by: A quick-release connection structure is provided between the protective shell (33) and the outer shell (31). The connection structure includes multiple connecting rods (35) installed on one side of the protective shell (33) and multiple connecting holes (36) opened on one side of the outer shell (31). The multiple connecting rods (35) correspond one-to-one with the multiple connecting holes (36), and each of the multiple connecting rods (35) is provided with an elastic element inside. Both sides of the elastic element are connected with a locking block (315) that can extend to the outside of the connecting rod (35). The inner wall of the connecting hole (36) is provided with a locking hole that cooperates with the locking block (315).

5. The limit switch device for an elevator according to claim 4, characterized in that: The elastic element includes a cavity formed inside the connecting rod (35), a second spring (316) is provided in the cavity, and both ends of the second spring (316) are connected to a connecting plate (317) that can move along the cavity. The locking block (315) is installed on the side of the connecting plate (317) away from the second spring (316).

6. The limit switch device for an elevator according to claim 4, characterized by: A guide bar is also installed on the inner wall of the connecting hole (36), and a guide groove that cooperates with the guide bar is provided on the outer wall of the connecting rod (35).

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