An elevator call box

Abstract

The application relates to an elevator calling box, belonging to the technical field of elevator accessories, which comprises an industrial automatic control system device manufacturing type panel, a calling button and a bottom box. The industrial automatic control system device manufacturing type panel is buckled on the bottom box. The calling button is arranged on the industrial automatic control system device manufacturing type panel. The calling button comprises a mounting shell, a button cap, a spring and an adjusting ring. The mounting shell is arranged on the industrial automatic control system device manufacturing type panel. The button cap is slidingly arranged in the mounting shell. The adjusting ring is rotationally connected to the bottom wall of the mounting shell. A ring-shaped base body is arranged on the bottom wall of the mounting shell. A spiral guide groove is formed in the inner side wall of the ring-shaped base body. The spring is embedded in the spiral guide groove. One end of the spring is connected with the button cap, and the other end of the spring is connected with the adjusting ring. An electric trigger unit is connected between the mounting shell and the button cap. The application can relieve the slight fatigue of the spring and prolong the service life of the elevator calling box.

Description

Technical Field

[0001] This application relates to the technical field of elevator accessories, and in particular to an elevator call box. Background Technology

[0002] In today's society, high-rise buildings are ubiquitous. To facilitate people's daily lives, elevators have become an indispensable amenity in many buildings, making the elevator call box, as a crucial component of the elevator, particularly important. The elevator call box is installed at the elevator entrance on each floor. Passengers press the call button to summon the elevator to their current floor, and the display screen promptly informs passengers of the elevator's operational status.

[0003] Currently, the spring under the call button in the elevator call box is repeatedly pressed at high frequency. After a period of time, the spring's performance deteriorates, resulting in slight fatigue, which reduces the sensitivity of the elevator call box and shortens its service life.

[0004] Regarding the aforementioned technologies, the inventors believe that there is a defect where repeated pressing of the button spring causes fatigue, thus affecting the button's lifespan. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides an elevator call box.

[0006] This application provides an elevator call box, which adopts the following technical solution: An elevator call box includes a prefabricated panel for an industrial automatic control system device, a call button, and a base box. The prefabricated panel is fastened to the base box. The call button is disposed on the prefabricated panel. The call button includes a mounting shell, a button cap, a spring, and an adjusting ring. The mounting shell is disposed on the prefabricated panel. The button cap is slidably disposed within the mounting shell. The adjusting ring is rotatably connected to the bottom wall of the mounting shell. An annular base is disposed on the bottom wall of the mounting shell. A spiral guide groove is formed on the inner side wall of the annular base. The spring is embedded in the spiral guide groove. One end of the spring is connected to the button cap, and the other end is connected to the adjusting ring. An electrical trigger unit is connected between the mounting shell and the button cap.

[0007] By adopting the above technical solution, and by setting a spiral guide groove on the inner wall of the annular substrate and embedding the spring inside the spiral guide groove, the working mode of the traditional call button spring, which only involves single axial compression deformation, is changed. During the pressing of the button cap, the spring, when compressed, is guided and limited by the side wall of the spiral guide groove, transforming the simple axial extension and contraction motion into a composite motion of axial compression combined with circumferential torsion. This effectively solves the problems of slow reset, jamming, and incomplete reset caused by spring fatigue in traditional buttons, ensuring the pressing and reset sensitivity of elevator call buttons during long-term use and improving the stability of equipment operation.

[0008] Preferably, the call button further includes a torsion spring; the torsion spring is sleeved on the outside of the adjustment ring; one end of the torsion spring is connected to the adjustment ring, and the other end is connected to the mounting shell.

[0009] By adopting the above technical solution, when the spring is compressed and generates a spiral motion and drives the adjusting ring to rotate, the torsion spring undergoes torsional deformation synchronously with the adjusting ring, and relies on its own torsional elastic force to pull the adjusting ring in the opposite direction; after the button cap is released and the pressing pressure is removed, the spring's relaxed restoring force and the torsional rebound force of the torsion spring are superimposed to form a compound restoring driving force, avoiding the faults of the button unit getting stuck after being pressed, slow rebound, and failure to automatically return to its original position.

[0010] Preferably, a stop ring is provided on the side wall of the mounting housing; a limit ring is provided on the periphery of the button cap; the limit ring is located between the top wall inside the mounting housing and the stop ring.

[0011] By adopting the above technical solution, when the button cap is pressed down to the limit, the limiting ring will abut against the stop ring to form a hard block, preventing the button cap from continuing to move downward, avoiding the electrical trigger unit being squeezed or jammed, and significantly extending the service life of the electrical trigger unit.

[0012] Preferably, an annular airbag is connected between the limiting ring and the stop ring; multiple air inlets are provided at the bottom of the inner sidewall of the annular airbag; multiple air outlets are provided at the top of the annular airbag; multiple air outlet pipes are provided on the limiting ring; the bottom end of the air outlet pipe is connected to the air outlet; and the top end of the air outlet pipe penetrates the limiting ring vertically.

[0013] By adopting the above technical solution, under normal conditions, the annular airbag is connected to the inner cavity of the mounting shell through the bottom air inlet. Water vapor or condensation inside the mounting shell can be stored inside the annular airbag through the air inlet. The humidity inside the annular airbag is consistent with that inside the mounting shell, which can reflect the moisture status inside the button in real time and provide a storage medium for water accumulation warning. After the button cap is pressed, the air inlet is sealed and blocked, and the annular airbag forms a closed air chamber. During the pressing process, the volume of the annular airbag contracts, and the internal gas continuously accumulates pressure. After reaching the limit stroke, the high-pressure medium can be concentrated and sprayed outward through the air outlet and air outlet pipe, relying on air pressure to carry out the water accumulated inside the annular airbag, realizing a visual water ingress reminder.

[0014] Preferably, the limiting ring is provided with a plurality of sealing plates; the plurality of sealing plates are respectively located above the plurality of air inlets; the bottom wall of the sealing plate extends downward to the air inlet.

[0015] By adopting the above technical solution, during the pressing of the button cap, the sealing plate moves down synchronously with the limiting ring, and the lower end directly covers the air inlet. This, combined with the compression and contraction of the annular airbag, forms a double seal, quickly isolating the annular airbag from the inner cavity of the mounting shell. This prevents gas or water from flowing back from the air inlet during compression, ensuring that the annular airbag can quickly accumulate pressure and guaranteeing sufficient force for subsequent air and water spray warnings. When the button cap rebounds and resets, the sealing plate rises up with the limiting ring, completely separating from the air inlet, and the air passage is reopened. The expansion of the annular airbag generates negative pressure, allowing air from inside the mounting shell to smoothly enter the annular airbag through the air inlet, restoring the air volume inside the annular airbag and providing conditions for the next press to store air and water, thus achieving self-replenishment of the air passage circulation.

[0016] Preferably, the top wall inside the mounting housing has multiple slots; the top ends of the multiple air outlet pipes are respectively inserted into or away from the multiple slots.

[0017] By adopting the above technical solution, when the button cap is not pressed and the top of the vent pipe is inserted into the slot, the inner wall of the slot wraps around the end of the vent pipe to form a sealed partition, isolating the annular airbag cavity from the sliding gap on the outside of the button. External moisture and dust will not flow back into the annular airbag and the mounting shell along the vent pipe, avoiding air blockage and moisture corrosion of internal electrical components. During the pressing process, the vent pipe moves down synchronously with the limit ring, gradually disengaging from the slot, and the exhaust channel opens with a delay. Until the limit ring reaches the maximum compression stroke, the vent pipe is completely disengaged from the slot, and the annular airbag has accumulated sufficient high pressure. Gas or water is sprayed out instantly and in a concentrated manner, without premature depressurization leading to insufficient water spray or incomplete drainage of water, ensuring the reliability of the water accumulation warning function.

[0018] Preferably, the electrical triggering unit includes a plunger and a circuit board; one end of the plunger is connected to a button cap, and the other end is provided with a trigger metal piece; the circuit board is disposed inside the bottom box; and two trigger heads are provided on the circuit board.

[0019] By adopting the above technical solution, the plunger directly connects the button cap and the trigger metal plate. The vertical displacement of the button cap can be transmitted to the trigger metal plate below without lag. The downward stroke is stable and controllable, which can ensure that the trigger metal plate synchronously attaches to the two sets of trigger heads on the circuit board, realizing instantaneous circuit conduction.

[0020] Preferably, the two ends of the trigger metal sheet are respectively provided with contacts corresponding to the two trigger heads.

[0021] Preferably, the mounting housing has two mounting ears on each side; each mounting ear has a mounting hole; a screw passes through the mounting hole; the screw is threaded to the industrial automatic control system device manufacturing panel.

[0022] By adopting the above technical solution, the mounting shell is locked and fixed to the panel by the mounting ears and mounting holes on both sides and screws. During fault repair, the entire set of call buttons can be removed by simply unscrewing the screws, which greatly simplifies the maintenance operation and shortens the elevator maintenance downtime.

[0023] Preferably, the top of the button cap is engraved with Braille corresponding to the text on it.

[0024] By adopting the above technical solution, the button caps are engraved with Braille corresponding to the floor markings, allowing visually impaired passengers to independently call the elevator by touching the identification buttons without the assistance of others, thus taking into account the travel needs of special groups.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting a spiral guide groove on the inner wall of the annular base and embedding the spring inside the spiral guide groove, the working mode of the traditional call button spring, which only undergoes single axial compression deformation, is changed. During the pressing of the button cap, the spring is guided and limited by the side wall of the spiral guide groove, transforming the simple axial extension and contraction motion into a composite motion of axial compression and circumferential torsion. The torsion spring enhances the elasticity of the spring and delays spring fatigue aging. It effectively solves the problems of slow reset, jamming, and incomplete reset caused by spring fatigue in traditional buttons, ensuring the pressing and reset sensitivity of elevator call buttons during long-term use and improving the stability of equipment operation.

[0026] 2. Under normal conditions, the annular airbag is connected to the inner cavity of the mounting shell through the bottom air inlet. Water vapor or condensation inside the mounting shell can be stored inside the annular airbag through the air inlet. The humidity inside the annular airbag is consistent with that inside the mounting shell, which can reflect the moisture status inside the button in real time and provide a storage medium for water accumulation warning. After the button cap is pressed, the air inlet is sealed and blocked, and the annular airbag forms a closed air chamber. During the pressing process, the volume of the annular airbag contracts, and the internal gas continuously accumulates pressure. After reaching the limit stroke, the high-pressure medium can be concentrated and sprayed outward through the air outlet and air outlet pipe, relying on air pressure to carry out the water accumulated inside the annular airbag, realizing a visual water ingress reminder.

[0027] 3. When the button cap is not pressed and the top of the vent pipe is inserted into the slot, the inner wall of the slot wraps around the end of the vent pipe to form a sealed partition, isolating the annular airbag cavity from the sliding gap on the outside of the button. External moisture and dust will not flow back into the annular airbag and the mounting shell through the vent pipe, avoiding air blockage and moisture corrosion of internal electrical components. During the pressing process, the vent pipe moves down synchronously with the limit ring, gradually disengaging from the slot, and the exhaust channel opens with a delay. Until the limit ring reaches the maximum compression stroke, the vent pipe is completely disengaged from the slot, and sufficient high pressure has accumulated inside the annular airbag. Gas or water is sprayed out instantly and in a concentrated manner, preventing premature depressurization that could lead to insufficient water spray or incomplete drainage of water, thus ensuring the reliability of the water accumulation warning function. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the elevator call box.

[0029] Figure 2 This is a schematic diagram of the external structure of the button unit in the embodiment.

[0030] Figure 3 This is a schematic diagram of the internal structure of the mounting shell in the embodiment.

[0031] Figure 4 yes Figure 3 A magnified view of part A in the image.

[0032] Figure 5 yes Figure 3 A magnified view of part B in the image.

[0033] Explanation of reference numerals in the attached figures: 1. Industrial automatic control system device manufacturing panel; 2. Call button; 21. Mounting housing; 211. Mounting ear; 212. Stop ring; 213. Slot; 22. Button cap; 221. Limit ring; 2211. Sealing plate; 23. Spring; 24. Adjusting ring; 25. Torsion spring; 26. Annular base; 261. Spiral guide groove; 3. Base box; 4. Electrical trigger unit; 41. Plunger; 411. Trigger metal plate; 4111. Contact; 42. Circuit board; 421. Trigger head; 5. Annular airbag; 51. Air inlet; 52. Air outlet; 6. Air outlet pipe. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses an elevator call box. (Refer to...) Figure 1-4 The system includes an industrial automatic control system device manufacturing panel 1, a call button 2, and a base box 3. The industrial automatic control system device manufacturing panel 1 is bolted to the base box 3. The call button 2 is located between the industrial automatic control system device manufacturing panel 1 and the base box 3 and is bolted to the industrial automatic control system device manufacturing panel 1. The bolted connection facilitates disassembly and repair by maintenance personnel when the elevator call box malfunctions.

[0036] The main device for relieving slight fatigue of the spring 23 inside the call button 2 is as follows: The call button 2 includes a mounting housing 21, a button cap 22, a plunger 41, a torsion spring 25, a spring 23, and an adjusting ring 24. Two mounting ears 211 are respectively provided on both sides of the mounting housing 21; each mounting ear 211 has a mounting hole; by passing a screw through the mounting hole, it is threaded onto the industrial automatic control system device manufacturing panel 1, thereby detachably mounting the mounting housing 21 onto the industrial automatic control system device manufacturing panel 1; the button cap 22 is slidably disposed inside the mounting housing 21; one side of the button cap 22... Located on the outer side of the industrial automatic control system device manufacturing panel 1, and engraved with Braille corresponding to the text thereon, the other side of the button cap 22 is fixedly connected to the spring 23, and the other end of the spring 23 is connected to the adjusting ring 24, which is rotatably connected to the bottom wall of the mounting shell 21; the torsion spring 25 is sleeved on the outside of the adjusting ring 24; one end of the torsion spring 25 is connected to the adjusting ring 24, and the other end is connected to the mounting shell 21; an annular base 26 is provided on the bottom wall of the mounting shell 21; a spiral guide groove 261 is opened on the inner side wall of the annular base 26; the spring 23 is embedded in the spiral guide groove 261.

[0037] An electrical triggering unit 4 is connected between the mounting housing 21 and the button cap 22. The electrical triggering unit 4 includes a plunger 41 and a circuit board 42. The circuit board 42 is mounted on the bottom wall of the mounting housing 21. Two trigger heads 421 are provided on the circuit board 42. A main control circuit board is installed inside the bottom box 3. The circuit board 42 is electrically connected to the main control circuit board. One end of the plunger 41 is connected to the button cap 22, and the other end is provided with a trigger metal piece 411. The two ends of the trigger metal piece 411 are respectively provided with contacts 4111 corresponding to the two trigger heads 421.

[0038] When a passenger presses button cap 22 to summon the elevator, plunger 41 moves trigger metal plate 411 synchronously until the two contacts 4111 at the bottom of trigger metal plate 411 are fully in contact with the two trigger heads 421 of circuit board 42. The two contact paths are connected, and circuit board 42 generates floor electrical signals, which are transmitted to the main control circuit board via the cable tray to complete logic recognition and command issuance. At this time, spring 23 is compressed. Since spring 23 is embedded in the spiral groove, the wall of the spiral groove generates a normal reaction force on spring 23. This normal reaction force can be decomposed into axial force and tangential force, where the tangential force will drive spring 23 to move along the trajectory of the spiral groove. Thus, the simple axial compression motion of spring 23 is converted into helical motion along the helical groove; when spring 23 performs helical motion, it pulls the adjusting ring 24 to rotate, thereby tightening spring 23 and increasing the elastic force of spring 23; in the case of spring 23 fatigue, this tightening force can effectively supplement the elastic force of spring 23, thereby increasing the service life of spring 23 and alleviating the problem of button not being able to reset in time due to elastic fatigue of spring 23.

[0039] Reference Figure 5 A stop ring 212 is provided on the side wall of the mounting housing 21; a limit ring 221 is provided on the periphery of the button cap 22; the limit ring 221 is located between the top wall inside the mounting housing 21 and the stop ring 212; when the button cap 22 is pressed, the stop ring 212 can limit the excessive displacement of the limit ring 221, thereby preventing excessive compression between the contact 4111 and the trigger head 421, and improving the service life of the electrical trigger unit 4; an annular airbag 5 is connected between the limit ring 221 and the stop ring 212; the inner ring side wall of the annular airbag 5 Multiple air inlets 51 are provided at the bottom; multiple air outlets 52 are provided at the top of the annular airbag 5; multiple air outlet pipes 6 are provided on the limiting ring 221; the bottom end of the air outlet pipe 6 is connected to the air outlet 52; the top end of the air outlet pipe 6 passes through the limiting ring 221 vertically; multiple sealing plates 2211 are provided on the limiting ring 221; the multiple sealing plates 2211 are respectively located above the multiple air inlets 51; the bottom wall of the sealing plate 2211 extends downward to the air inlet 51; multiple slots 213 are provided on the top wall inside the mounting shell 21.

[0040] When the button cap 22 is in the initial unpressed and stationary state, the limit ring 221 rises, and the annular airbag 5 is fully expanded without compression; the bottom of the sealing plate 2211 is far away from the air inlet 51 at the bottom of the airbag, and all air inlets 51 are fully open. The cavity of the annular airbag 5 is in long-term communication with the entire internal cavity of the mounting shell 21 through the air inlet 51. The air humidity and air pressure inside the annular airbag 5 are completely synchronized with those inside the mounting shell 21, reflecting the humidity level inside the mounting shell 21 in real time. If the mounting shell 21 fails to seal, condenses, or leaks water, the accumulated water will flow into the annular airbag 5 along the air inlet 51 and be stored inside the annular airbag 5.

[0041] At this time, the top of each vent pipe 6 is inserted into the corresponding slot 213 with the top end facing upward. The slot 213 wraps around the top end of the vent pipe 6 to form a sealed partition. The gas inside the annular airbag 5 cannot leak out through the vent pipe 6, and external dust and water vapor will not enter the interior of the mounting shell 21 through the vent pipe 6 in the opposite direction.

[0042] When the button cap 22 is pressed, the button cap 22 slides vertically downward along the inner wall of the mounting shell 21. The limiting ring 221 moves downward simultaneously to compress the annular airbag 5. The annular airbag 5 is compressed, and the cavity volume shrinks rapidly. At the same time, the sealing plate 2211 moves downward along with the limiting ring 221. The lower end of the sealing plate 2211 directly covers and blocks the corresponding air inlet 51. After the annular airbag 5 is compressed, the side wall contracts inward to compress the air inlet 51, forming a double seal. This completely cuts off the ventilation channel between the annular airbag 5 and the inner cavity of the mounting shell 21. The annular airbag 5 becomes an independent sealed cavity, and the internal gas or water is sealed inside the airbag and cannot flow back into the mounting shell 21.

[0043] As the limiting ring 221 continues to move downward, the exhaust pipe 6 moves downward in sync. The top of the exhaust pipe 6, which was originally inserted into the slot 213, is gradually pulled out of the slot 213. The annular airbag 5 has a passage for exhausting air outward, but at this time the compression stroke of the annular airbag 5 has not reached its limit, and the internal pressure of the annular airbag 5 continues to rise.

[0044] When the limiting ring 221 descends to its lowest limit position, the annular airbag 5 is compressed to its minimum volume, and the internal air pressure instantly reaches its peak. At this time, the top of the vent pipe 6 completely disengages from the slot 213, and the air stored in the annular airbag 5 or the previously accumulated water rushes into the vent pipe 6 from the top vent 52 of the annular airbag 5, and is instantly sprayed outward through the vent pipe 6. The sprayed air or water overflows to the outside of the button along the vertical sliding gap between the outer wall of the button cap 22 and the inner wall of the mounting shell 21. If there is water inside the airbag, the water spraying action is visible to the naked eye, directly reminding the operator that water has entered the mounting shell 21 and that it needs to be disassembled for inspection and waterproofing. If there is no water, only high-pressure airflow is sprayed to blow away dust from the sliding gap and provide an auxiliary effect of moisture prevention.

[0045] After the pressure is removed, the limiting ring 221 pulls the annular airbag 5 upward, and the annular airbag 5 expands axially, gradually restoring the cavity volume; the exhaust pipe 6 rises upward synchronously with the limiting ring 221, and the pipe head is reinserted into the slot 213, and the exhaust passage is sealed and isolated by the slot 213 again.

[0046] As the limiting ring 221 continues to move upward, the sealing plate 2211 fixed on it rises synchronously. When the button cap 22 is fully reset, the bottom of the sealing plate 2211 leaves the air inlet 51, and the air inlet 51 reopens completely. The airbag cavity expands to generate negative pressure, and the air inside the mounting shell 21 is instantly drawn into the airbag through the air inlet 51, completing the air replenishment inside the airbag and storing gas for the next press.

[0047] It should be noted that the state when the opening of the button cap 22 on the top of the mounting shell 21 is facing upward is taken as the reference; the sliding of the button cap 22 into the mounting shell 21 is defined as sliding downward.

[0048] The working principle of an elevator call box in this application is as follows: When a passenger presses button cap 22, plunger 41 moves the trigger metal piece 411 with double contacts 4111 at the bottom downwards. The contacts 4111 then contact the two sets of trigger heads 421 on the circuit board 42, and the circuit is turned on to generate a floor signal, which is transmitted to the main control board of the bottom box 3 for recognition and to issue an elevator call command.

[0049] The button reset spring 23 is embedded in the spiral guide groove 261 of the annular base 26 of the mounting shell 21. When pressed, the spring 23 is compressed, and the reaction force of the spiral guide groove 261 wall is decomposed into a tangential component force, which drives the spring 23 to make a spiral movement along the spiral guide groove 261. This pulls the adjusting ring 24 to rotate and tighten the spring 23, compensate for the spring 23's reduced elasticity, alleviate elastic fatigue, ensure that the button cap 22 rebounds quickly, and extend the service life of the spring 23. The torsion spring 25 works with the adjusting ring 24 to assist in the rotation reset.

[0050] Under normal conditions, the sealing plate 2211 is raised, the air inlet 51 of the annular airbag 5 is open, the annular airbag 5 is interconnected with the inner cavity of the mounting shell 21, and the internal humidity is synchronized. Water seepage and condensation will be stored in the annular airbag 5; the top of the air outlet pipe 6 is inserted into the slot 213 to seal and lock the air.

[0051] When the button cap 22 is pressed down, the annular airbag 5 is sealed and pressurized. The limiting ring 221 moves downward, causing the air outlet pipe 6 to disengage from the slot 213. When it reaches the limit position, the gas / water inside the annular airbag 5 is ejected from the air outlet pipe 6 and overflows along the sliding gap of the button cap 22. Spraying water can visually indicate that water has entered the interior and maintenance is needed. Spraying air can blow away dust and moisture from the gap. After the button cap 22 is released, the annular airbag 5 expands, the air inlet 51 is reopened, air from the mounting shell 21 is replenished into the annular airbag 5, the air outlet pipe 6 is reinserted into the slot 213 and sealed, and the structure is reset to await the next press.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An elevator call box, characterized in that: The device includes a prefabricated panel (1), a call button (2), and a base box (3); the prefabricated panel (1) is fastened to the base box (3); the call button (2) is disposed on the prefabricated panel (1); the call button (2) includes a mounting shell (21), a button cap (22), a spring (23), and an adjusting ring (24); the mounting shell (21) is disposed on the prefabricated panel (1); the button cap (22) is slidably disposed on the prefabricated panel (1). The mounting housing (21) is placed inside the mounting housing (21); the adjusting ring (24) is rotatably connected to the bottom wall of the mounting housing (21); an annular base (26) is provided on the bottom wall of the mounting housing (21); a spiral guide groove (261) is provided on the inner side wall of the annular base (26); the spring (23) is embedded in the spiral guide groove (261); one end of the spring (23) is connected to the button cap (22), and the other end is connected to the adjusting ring (24); an electrical trigger unit (4) is connected between the mounting housing (21) and the button cap (22).

2. An elevator call box according to claim 1, characterized in that: The call button (2) also includes a torsion spring (25); the torsion spring (25) is sleeved on the outside of the adjustment ring (24); one end of the torsion spring (25) is connected to the adjustment ring (24), and the other end is connected to the mounting shell (21).

3. An elevator call box according to claim 1, characterized in that: A stop ring (212) is provided on the side wall of the mounting shell (21); a limit ring (221) is provided on the periphery of the button cap (22); the limit ring (221) is located between the top wall inside the mounting shell (21) and the stop ring (212).

4. An elevator call box according to claim 3, characterized in that: An annular airbag (5) is connected between the limiting ring (221) and the stop ring (212); multiple air inlets (51) are provided at the bottom of the inner sidewall of the annular airbag (5); multiple air outlets (52) are provided at the top of the annular airbag (5); multiple air outlet pipes (6) are provided on the limiting ring (221); the bottom end of the air outlet pipe (6) is connected to the air outlet (52); the top end of the air outlet pipe (6) passes through the limiting ring (221) vertically.

5. An elevator call box according to claim 4, characterized in that: The limiting ring (221) is provided with a plurality of sealing plates (2211); the plurality of sealing plates (2211) are respectively located above the plurality of air inlets (51); the bottom wall of the sealing plate (2211) extends downward to the air inlet (51).

6. An elevator call box according to claim 4, characterized in that: Multiple slots (213) are provided on the top wall inside the mounting housing (21); the top ends of the multiple air outlet pipes (6) are respectively inserted into or away from the multiple slots (213).

7. An elevator call box according to claim 1, characterized in that: The electrical triggering unit (4) includes a plunger (41) and a circuit board (42); one end of the plunger (41) is connected to the button cap (22), and the other end is provided with a trigger metal piece (411); the circuit board (42) is located inside the bottom box (3); two trigger heads (421) are provided on the circuit board (42).

8. An elevator call box according to claim 7, characterized in that: The two ends of the trigger metal piece (411) are respectively provided with contacts (4111) corresponding to the two trigger heads (421).

9. An elevator call box according to claim 1, characterized in that: The mounting housing (21) has two mounting ears (211) on each side; the mounting ears (211) have mounting holes; screws are inserted into the mounting holes; the screws are threaded to the industrial automatic control system device manufacturing panel (1).

10. An elevator call box according to claim 1, characterized in that: The button cap (22) is engraved with Braille that matches the text on it.

Images